Commit | Line | Data |
---|---|---|
c906108c SS |
1 | What has changed in GDB? |
2 | (Organized release by release) | |
3 | ||
cd385f94 JB |
4 | *** Changes since GDB 8.1 |
5 | ||
b744723f AA |
6 | * The commands 'info variables/functions/types' now show the source line |
7 | numbers of symbol definitions when available. | |
8 | ||
2d97a5d9 JB |
9 | * 'info proc' now works on running processes on FreeBSD systems and core |
10 | files created on FreeBSD systems. | |
11 | ||
007e1530 TT |
12 | * C expressions can now use _Alignof, and C++ expressions can now use |
13 | alignof. | |
14 | ||
386a8676 JB |
15 | * New commands |
16 | ||
17 | set debug fbsd-nat | |
18 | show debug fbsd-nat | |
19 | Control display of debugging info regarding the FreeBSD native target. | |
20 | ||
3fcded8f JB |
21 | set|show varsize-limit |
22 | This new setting allows the user to control the maximum size of Ada | |
23 | objects being printed when those objects have a variable type, | |
24 | instead of that maximum size being hardcoded to 65536 bytes. | |
25 | ||
4a4495d6 MM |
26 | set|show record btrace cpu |
27 | Controls the processor to be used for enabling errata workarounds for | |
28 | branch trace decode. | |
29 | ||
6d7bb824 TT |
30 | * Python API |
31 | ||
32 | ** Type alignment is now exposed via the "align" attribute of a gdb.Type. | |
33 | ||
a913fffb TT |
34 | ** The commands attached to a breakpoint can be set by assigning to |
35 | the breakpoint's "commands" field. | |
36 | ||
56bcdbea TT |
37 | ** gdb.execute can now execute multi-line gdb commands. |
38 | ||
dbbb1059 AB |
39 | * New targets |
40 | ||
41 | RiscV ELF riscv*-*-elf | |
42 | ||
a2a79012 PA |
43 | * Removed targets and native configurations |
44 | ||
45 | m88k running OpenBSD m88*-*-openbsd* | |
8a3de5e1 PA |
46 | SH-5/SH64 ELF sh64-*-elf*, SH-5/SH64 support in sh* |
47 | SH-5/SH64 running GNU/Linux SH-5/SH64 support in sh*-*-linux* | |
48 | SH-5/SH64 running OpenBSD SH-5/SH64 support in sh*-*-openbsd* | |
a2a79012 | 49 | |
a3b60e45 JK |
50 | * Aarch64/Linux hardware watchpoints improvements |
51 | ||
52 | Hardware watchpoints on unaligned addresses are now properly | |
53 | supported when running Linux kernel 4.10 or higher: read and access | |
54 | watchpoints are no longer spuriously missed, and all watchpoints | |
55 | lengths between 1 and 8 bytes are supported. On older kernels, | |
56 | watchpoints set on unaligned addresses are no longer missed, with | |
57 | the tradeoff that there is a possibility of false hits being | |
58 | reported. | |
59 | ||
cd385f94 | 60 | *** Changes in GDB 8.1 |
305d16a9 | 61 | |
cef0f868 SH |
62 | * GDB now supports dynamically creating arbitrary register groups specified |
63 | in XML target descriptions. This allows for finer grain grouping of | |
64 | registers on systems with a large amount of registers. | |
65 | ||
7c161838 SDJ |
66 | * The 'ptype' command now accepts a '/o' flag, which prints the |
67 | offsets and sizes of fields in a struct, like the pahole(1) tool. | |
68 | ||
97cbe998 SDJ |
69 | * New "--readnever" command line option instructs GDB to not read each |
70 | symbol file's symbolic debug information. This makes startup faster | |
71 | but at the expense of not being able to perform symbolic debugging. | |
72 | This option is intended for use cases where symbolic debugging will | |
73 | not be used, e.g., when you only need to dump the debuggee's core. | |
74 | ||
2400729e UW |
75 | * GDB now uses the GNU MPFR library, if available, to emulate target |
76 | floating-point arithmetic during expression evaluation when the target | |
77 | uses different floating-point formats than the host. At least version | |
78 | 3.1 of GNU MPFR is required. | |
79 | ||
289e23aa AA |
80 | * GDB now supports access to the guarded-storage-control registers and the |
81 | software-based guarded-storage broadcast control registers on IBM z14. | |
82 | ||
0a2dde4a SDJ |
83 | * On Unix systems, GDB now supports transmitting environment variables |
84 | that are to be set or unset to GDBserver. These variables will | |
85 | affect the environment to be passed to the remote inferior. | |
86 | ||
87 | To inform GDB of environment variables that are to be transmitted to | |
88 | GDBserver, use the "set environment" command. Only user set | |
89 | environment variables are sent to GDBserver. | |
90 | ||
91 | To inform GDB of environment variables that are to be unset before | |
92 | the remote inferior is started by the GDBserver, use the "unset | |
93 | environment" command. | |
94 | ||
d044bac8 PA |
95 | * Completion improvements |
96 | ||
97 | ** GDB can now complete function parameters in linespecs and | |
98 | explicit locations without quoting. When setting breakpoints, | |
99 | quoting around functions names to help with TAB-completion is | |
100 | generally no longer necessary. For example, this now completes | |
101 | correctly: | |
102 | ||
103 | (gdb) b function(in[TAB] | |
104 | (gdb) b function(int) | |
105 | ||
106 | Related, GDB is no longer confused with completing functions in | |
107 | C++ anonymous namespaces: | |
108 | ||
109 | (gdb) b (anon[TAB] | |
110 | (gdb) b (anonymous namespace)::[TAB][TAB] | |
111 | (anonymous namespace)::a_function() | |
112 | (anonymous namespace)::b_function() | |
113 | ||
114 | ** GDB now has much improved linespec and explicit locations TAB | |
115 | completion support, that better understands what you're | |
116 | completing and offers better suggestions. For example, GDB no | |
117 | longer offers data symbols as possible completions when you're | |
118 | setting a breakpoint. | |
119 | ||
120 | ** GDB now TAB-completes label symbol names. | |
121 | ||
122 | ** The "complete" command now mimics TAB completion accurately. | |
123 | ||
c179febe SL |
124 | * New command line options (gcore) |
125 | ||
126 | -a | |
127 | Dump all memory mappings. | |
128 | ||
a20714ff PA |
129 | * Breakpoints on C++ functions are now set on all scopes by default |
130 | ||
131 | By default, breakpoints on functions/methods are now interpreted as | |
132 | specifying all functions with the given name ignoring missing | |
133 | leading scopes (namespaces and classes). | |
134 | ||
135 | For example, assuming a C++ program with symbols named: | |
136 | ||
137 | A::B::func() | |
138 | B::func() | |
139 | ||
140 | both commands "break func()" and "break B::func()" set a breakpoint | |
141 | on both symbols. | |
142 | ||
143 | You can use the new flag "-qualified" to override this. This makes | |
144 | GDB interpret the specified function name as a complete | |
145 | fully-qualified name instead. For example, using the same C++ | |
146 | program, the "break -q B::func" command sets a breakpoint on | |
b89641ba SM |
147 | "B::func", only. A parameter has been added to the Python |
148 | gdb.Breakpoint constructor to achieve the same result when creating | |
149 | a breakpoint from Python. | |
a20714ff | 150 | |
bd69330d PA |
151 | * Breakpoints on functions marked with C++ ABI tags |
152 | ||
153 | GDB can now set breakpoints on functions marked with C++ ABI tags | |
154 | (e.g., [abi:cxx11]). See here for a description of ABI tags: | |
155 | https://developers.redhat.com/blog/2015/02/05/gcc5-and-the-c11-abi/ | |
156 | ||
157 | Functions with a C++11 abi tag are demangled/displayed like this: | |
158 | ||
159 | function[abi:cxx11](int) | |
160 | ^^^^^^^^^^^ | |
161 | ||
162 | You can now set a breakpoint on such functions simply as if they had | |
163 | no tag, like: | |
164 | ||
165 | (gdb) b function(int) | |
166 | ||
167 | Or if you need to disambiguate between tags, like: | |
168 | ||
169 | (gdb) b function[abi:other_tag](int) | |
170 | ||
171 | Tab completion was adjusted accordingly as well. | |
172 | ||
7c96f8c1 TT |
173 | * Python Scripting |
174 | ||
175 | ** New events gdb.new_inferior, gdb.inferior_deleted, and | |
176 | gdb.new_thread are emitted. See the manual for further | |
177 | description of these. | |
178 | ||
4e725347 JB |
179 | ** A new function, "gdb.rbreak" has been added to the Python API. |
180 | This function allows the setting of a large number of breakpoints | |
181 | via a regex pattern in Python. See the manual for further details. | |
d8ae99a7 | 182 | |
824cc835 PM |
183 | ** Python breakpoints can now accept explicit locations. See the |
184 | manual for a further description of this feature. | |
185 | ||
186 | ||
6d580b63 YQ |
187 | * New features in the GDB remote stub, GDBserver |
188 | ||
bc3b087d SDJ |
189 | ** GDBserver is now able to start inferior processes with a |
190 | specified initial working directory. | |
191 | ||
192 | The user can set the desired working directory to be used from | |
193 | GDB using the new "set cwd" command. | |
194 | ||
6d580b63 YQ |
195 | ** New "--selftest" command line option runs some GDBserver self |
196 | tests. These self tests are disabled in releases. | |
197 | ||
198 | ** On Unix systems, GDBserver now does globbing expansion and variable | |
199 | substitution in inferior command line arguments. | |
200 | ||
201 | This is done by starting inferiors using a shell, like GDB does. | |
202 | See "set startup-with-shell" in the user manual for how to disable | |
203 | this from GDB when using "target extended-remote". When using | |
204 | "target remote", you can disable the startup with shell by using the | |
205 | new "--no-startup-with-shell" GDBserver command line option. | |
aefd8b33 | 206 | |
0a2dde4a SDJ |
207 | ** On Unix systems, GDBserver now supports receiving environment |
208 | variables that are to be set or unset from GDB. These variables | |
209 | will affect the environment to be passed to the inferior. | |
210 | ||
e547c119 JB |
211 | * When catching an Ada exception raised with a message, GDB now prints |
212 | the message in the catchpoint hit notification. In GDB/MI mode, that | |
213 | information is provided as an extra field named "exception-message" | |
214 | in the *stopped notification. | |
215 | ||
7403715e TT |
216 | * Trait objects can now be inspected When debugging Rust code. This |
217 | requires compiler support which will appear in Rust 1.24. | |
218 | ||
aefd8b33 SDJ |
219 | * New remote packets |
220 | ||
0a2dde4a SDJ |
221 | QEnvironmentHexEncoded |
222 | Inform GDBserver of an environment variable that is to be passed to | |
223 | the inferior when starting it. | |
224 | ||
225 | QEnvironmentUnset | |
226 | Inform GDBserver of an environment variable that is to be unset | |
227 | before starting the remote inferior. | |
228 | ||
229 | QEnvironmentReset | |
230 | Inform GDBserver that the environment should be reset (i.e., | |
231 | user-set environment variables should be unset). | |
232 | ||
aefd8b33 SDJ |
233 | QStartupWithShell |
234 | Indicates whether the inferior must be started with a shell or not. | |
235 | ||
bc3b087d SDJ |
236 | QSetWorkingDir |
237 | Tell GDBserver that the inferior to be started should use a specific | |
238 | working directory. | |
239 | ||
8e2141c6 YQ |
240 | * The "maintenance print c-tdesc" command now takes an optional |
241 | argument which is the file name of XML target description. | |
242 | ||
1526853e SM |
243 | * The "maintenance selftest" command now takes an optional argument to |
244 | filter the tests to be run. | |
245 | ||
d0fe4701 XR |
246 | * The "enable", and "disable" commands now accept a range of |
247 | breakpoint locations, e.g. "enable 1.3-5". | |
248 | ||
c4dcb155 SM |
249 | * New commands |
250 | ||
d092c5a2 SDJ |
251 | set|show cwd |
252 | Set and show the current working directory for the inferior. | |
253 | ||
6e41ddec JK |
254 | set|show compile-gcc |
255 | Set and show compilation command used for compiling and injecting code | |
256 | with the 'compile' commands. | |
257 | ||
c4dcb155 SM |
258 | set debug separate-debug-file |
259 | show debug separate-debug-file | |
260 | Control the display of debug output about separate debug file search. | |
261 | ||
1e52e849 SL |
262 | set dump-excluded-mappings |
263 | show dump-excluded-mappings | |
264 | Control whether mappings marked with the VM_DONTDUMP flag should be | |
265 | dumped when generating a core file. | |
266 | ||
1526853e SM |
267 | maint info selftests |
268 | List the registered selftests. | |
269 | ||
4e5a4f58 JB |
270 | starti |
271 | Start the debugged program stopping at the first instruction. | |
272 | ||
b282f0f2 SH |
273 | set|show debug or1k |
274 | Control display of debugging messages related to OpenRISC targets. | |
275 | ||
883fd55a KS |
276 | set|show print type nested-type-limit |
277 | Set and show the limit of nesting level for nested types that the | |
278 | type printer will show. | |
279 | ||
44d0fb3a RK |
280 | * TUI Single-Key mode now supports two new shortcut keys: `i' for stepi and |
281 | `o' for nexti. | |
282 | ||
d69cf9b2 PA |
283 | * Safer/improved support for debugging with no debug info |
284 | ||
285 | GDB no longer assumes functions with no debug information return | |
286 | 'int'. | |
287 | ||
288 | This means that GDB now refuses to call such functions unless you | |
289 | tell it the function's type, by either casting the call to the | |
290 | declared return type, or by casting the function to a function | |
291 | pointer of the right type, and calling that: | |
292 | ||
293 | (gdb) p getenv ("PATH") | |
294 | 'getenv' has unknown return type; cast the call to its declared return type | |
295 | (gdb) p (char *) getenv ("PATH") | |
296 | $1 = 0x7fffffffe "/usr/local/bin:/"... | |
297 | (gdb) p ((char * (*) (const char *)) getenv) ("PATH") | |
298 | $2 = 0x7fffffffe "/usr/local/bin:/"... | |
299 | ||
300 | Similarly, GDB no longer assumes that global variables with no debug | |
301 | info have type 'int', and refuses to print the variable's value | |
302 | unless you tell it the variable's type: | |
303 | ||
304 | (gdb) p var | |
305 | 'var' has unknown type; cast it to its declared type | |
306 | (gdb) p (float) var | |
307 | $3 = 3.14 | |
308 | ||
351787dd JB |
309 | * New native configurations |
310 | ||
311 | FreeBSD/aarch64 aarch64*-*-freebsd* | |
4f9d9906 | 312 | FreeBSD/arm arm*-*-freebsd* |
351787dd | 313 | |
c0f84956 JB |
314 | * New targets |
315 | ||
316 | FreeBSD/aarch64 aarch64*-*-freebsd* | |
7176dfd2 | 317 | FreeBSD/arm arm*-*-freebsd* |
b282f0f2 | 318 | OpenRISC ELF or1k*-*-elf |
c0f84956 | 319 | |
281c4447 RO |
320 | * Removed targets and native configurations |
321 | ||
322 | Solaris 2.0-9 i?86-*-solaris2.[0-9], sparc*-*-solaris2.[0-9] | |
323 | ||
305d16a9 | 324 | *** Changes in GDB 8.0 |
51547df6 MS |
325 | |
326 | * GDB now supports access to the PKU register on GNU/Linux. The register is | |
327 | added by the Memory Protection Keys for Userspace feature which will be | |
328 | available in future Intel CPUs. | |
751b375e | 329 | |
c0f55cc6 AV |
330 | * GDB now supports C++11 rvalue references. |
331 | ||
0a0faf9f TW |
332 | * Python Scripting |
333 | ||
334 | ** New functions to start, stop and access a running btrace recording. | |
c0f55cc6 | 335 | ** Rvalue references are now supported in gdb.Type. |
0a0faf9f | 336 | |
20b477a7 LM |
337 | * GDB now supports recording and replaying rdrand and rdseed Intel 64 |
338 | instructions. | |
339 | ||
e6485aaf | 340 | * Building GDB and GDBserver now requires a C++11 compiler. |
d2946923 PA |
341 | |
342 | For example, GCC 4.8 or later. | |
cf6de44d PA |
343 | |
344 | It is no longer possible to build GDB or GDBserver with a C | |
345 | compiler. The --disable-build-with-cxx configure option has been | |
346 | removed. | |
347 | ||
f2ff9acd SM |
348 | * Building GDB and GDBserver now requires GNU make >= 3.81. |
349 | ||
350 | It is no longer supported to build GDB or GDBserver with another | |
351 | implementation of the make program or an earlier version of GNU make. | |
352 | ||
8ba42bc5 EZ |
353 | * Native debugging on MS-Windows supports command-line redirection |
354 | ||
355 | Command-line arguments used for starting programs on MS-Windows can | |
356 | now include redirection symbols supported by native Windows shells, | |
357 | such as '<', '>', '>>', '2>&1', etc. This affects GDB commands such | |
358 | as "run", "start", and "set args", as well as the corresponding MI | |
359 | features. | |
360 | ||
24cdb46e РИ |
361 | * Support for thread names on MS-Windows. |
362 | ||
363 | GDB now catches and handles the special exception that programs | |
364 | running on MS-Windows use to assign names to threads in the | |
365 | debugger. | |
366 | ||
9c37b5ae TT |
367 | * Support for Java programs compiled with gcj has been removed. |
368 | ||
df3ee9ca PA |
369 | * User commands now accept an unlimited number of arguments. |
370 | Previously, only up to 10 was accepted. | |
371 | ||
01770bbd PA |
372 | * The "eval" command now expands user-defined command arguments. |
373 | ||
374 | This makes it easier to process a variable number of arguments: | |
375 | ||
376 | define mycommand | |
377 | set $i = 0 | |
378 | while $i < $argc | |
379 | eval "print $arg%d", $i | |
380 | set $i = $i + 1 | |
381 | end | |
382 | end | |
383 | ||
3f7b46f2 IR |
384 | * Target descriptions can now describe registers for sparc32 and sparc64. |
385 | ||
0ae60b63 JK |
386 | * GDB now supports DWARF version 5 (debug information format). |
387 | Its .debug_names index is not yet supported. | |
388 | ||
b268007c JB |
389 | * New native configurations |
390 | ||
391 | FreeBSD/mips mips*-*-freebsd | |
392 | ||
ad0a504f AK |
393 | * New targets |
394 | ||
395 | Synopsys ARC arc*-*-elf32 | |
387360da | 396 | FreeBSD/mips mips*-*-freebsd |
ad0a504f | 397 | |
db6be0d5 SM |
398 | * Removed targets and native configurations |
399 | ||
400 | Alpha running FreeBSD alpha*-*-freebsd* | |
401 | Alpha running GNU/kFreeBSD alpha*-*-kfreebsd*-gnu | |
402 | ||
78cbbba8 LM |
403 | * New commands |
404 | ||
405 | flash-erase | |
406 | Erases all the flash memory regions reported by the target. | |
407 | ||
db6be0d5 SM |
408 | maint print arc arc-instruction address |
409 | Print internal disassembler information about instruction at a given address. | |
51457a05 | 410 | |
db6be0d5 | 411 | * New options |
65b48a81 PB |
412 | |
413 | set disassembler-options | |
414 | show disassembler-options | |
415 | Controls the passing of target specific information to the disassembler. | |
416 | If it is necessary to specify more than one disassembler option then | |
417 | multiple options can be placed together into a comma separated list. | |
418 | The default value is the empty string. Currently, the only supported | |
419 | targets are ARM, PowerPC and S/390. | |
420 | ||
db6be0d5 | 421 | * New MI commands |
eea78757 | 422 | |
db6be0d5 SM |
423 | -target-flash-erase |
424 | Erases all the flash memory regions reported by the target. This is | |
425 | equivalent to the CLI command flash-erase. | |
1e1a8bef | 426 | |
db6be0d5 SM |
427 | -file-list-shared-libraries |
428 | List the shared libraries in the program. This is | |
429 | equivalent to the CLI command "info shared". | |
1e1a8bef | 430 | |
bea298f9 XR |
431 | -catch-handlers |
432 | Catchpoints stopping the program when Ada exceptions are | |
433 | handled. This is equivalent to the CLI command "catch handlers". | |
434 | ||
751b375e | 435 | *** Changes in GDB 7.12 |
1233c0ba | 436 | |
69ffd7f2 PA |
437 | * GDB and GDBserver now build with a C++ compiler by default. |
438 | ||
439 | The --enable-build-with-cxx configure option is now enabled by | |
440 | default. One must now explicitly configure with | |
441 | --disable-build-with-cxx in order to build with a C compiler. This | |
442 | option will be removed in a future release. | |
443 | ||
c0272db5 TW |
444 | * GDBserver now supports recording btrace without maintaining an active |
445 | GDB connection. | |
446 | ||
bb556f1f TK |
447 | * GDB now supports a negative repeat count in the 'x' command to examine |
448 | memory backward from the given address. For example: | |
449 | ||
450 | (gdb) bt | |
451 | #0 Func1 (n=42, p=0x40061c "hogehoge") at main.cpp:4 | |
452 | #1 0x400580 in main (argc=1, argv=0x7fffffffe5c8) at main.cpp:8 | |
453 | (gdb) x/-5i 0x0000000000400580 | |
454 | 0x40056a <main(int, char**)+8>: mov %edi,-0x4(%rbp) | |
455 | 0x40056d <main(int, char**)+11>: mov %rsi,-0x10(%rbp) | |
456 | 0x400571 <main(int, char**)+15>: mov $0x40061c,%esi | |
457 | 0x400576 <main(int, char**)+20>: mov $0x2a,%edi | |
458 | 0x40057b <main(int, char**)+25>: | |
459 | callq 0x400536 <Func1(int, char const*)> | |
460 | ||
9920b434 BH |
461 | * Fortran: Support structures with fields of dynamic types and |
462 | arrays of dynamic types. | |
463 | ||
34c41c68 DE |
464 | * The symbol dumping maintenance commands have new syntax. |
465 | maint print symbols [-pc address] [--] [filename] | |
466 | maint print symbols [-objfile objfile] [-source source] [--] [filename] | |
467 | maint print psymbols [-objfile objfile] [-pc address] [--] [filename] | |
468 | maint print psymbols [-objfile objfile] [-source source] [--] [filename] | |
469 | maint print msymbols [-objfile objfile] [--] [filename] | |
470 | ||
81516450 DE |
471 | * GDB now supports multibit bitfields and enums in target register |
472 | descriptions. | |
473 | ||
f2f3ccb9 SM |
474 | * New Python-based convenience function $_as_string(val), which returns |
475 | the textual representation of a value. This function is especially | |
476 | useful to obtain the text label of an enum value. | |
477 | ||
012b3a21 WT |
478 | * Intel MPX bound violation handling. |
479 | ||
480 | Segmentation faults caused by a Intel MPX boundary violation | |
481 | now display the kind of violation (upper or lower), the memory | |
482 | address accessed and the memory bounds, along with the usual | |
483 | signal received and code location. | |
484 | ||
485 | For example: | |
486 | ||
487 | Program received signal SIGSEGV, Segmentation fault | |
488 | Upper bound violation while accessing address 0x7fffffffc3b3 | |
489 | Bounds: [lower = 0x7fffffffc390, upper = 0x7fffffffc3a3] | |
490 | 0x0000000000400d7c in upper () at i386-mpx-sigsegv.c:68 | |
491 | ||
0bdfa368 TT |
492 | * Rust language support. |
493 | GDB now supports debugging programs written in the Rust programming | |
494 | language. See https://www.rust-lang.org/ for more information about | |
495 | Rust. | |
496 | ||
86f78169 PA |
497 | * Support for running interpreters on specified input/output devices |
498 | ||
499 | GDB now supports a new mechanism that allows frontends to provide | |
500 | fully featured GDB console views, as a better alternative to | |
501 | building such views on top of the "-interpreter-exec console" | |
502 | command. See the new "new-ui" command below. With that command, | |
503 | frontends can now start GDB in the traditional command-line mode | |
504 | running in an embedded terminal emulator widget, and create a | |
505 | separate MI interpreter running on a specified i/o device. In this | |
506 | way, GDB handles line editing, history, tab completion, etc. in the | |
507 | console all by itself, and the GUI uses the separate MI interpreter | |
508 | for its own control and synchronization, invisible to the command | |
509 | line. | |
510 | ||
e3487908 GKB |
511 | * The "catch syscall" command catches groups of related syscalls. |
512 | ||
513 | The "catch syscall" command now supports catching a group of related | |
514 | syscalls using the 'group:' or 'g:' prefix. | |
515 | ||
d2dffb8d DE |
516 | * New commands |
517 | ||
518 | skip -file file | |
519 | skip -gfile file-glob-pattern | |
520 | skip -function function | |
521 | skip -rfunction regular-expression | |
522 | A generalized form of the skip command, with new support for | |
523 | glob-style file names and regular expressions for function names. | |
524 | Additionally, a file spec and a function spec may now be combined. | |
525 | ||
f2403c39 AB |
526 | maint info line-table REGEXP |
527 | Display the contents of GDB's internal line table data struture. | |
528 | ||
dcd1f979 TT |
529 | maint selftest |
530 | Run any GDB unit tests that were compiled in. | |
531 | ||
86f78169 PA |
532 | new-ui INTERP TTY |
533 | Start a new user interface instance running INTERP as interpreter, | |
534 | using the TTY file for input/output. | |
535 | ||
93daf339 TT |
536 | * Python Scripting |
537 | ||
538 | ** gdb.Breakpoint objects have a new attribute "pending", which | |
539 | indicates whether the breakpoint is pending. | |
8d2a0a14 TT |
540 | ** Three new breakpoint-related events have been added: |
541 | gdb.breakpoint_created, gdb.breakpoint_modified, and | |
542 | gdb.breakpoint_deleted. | |
93daf339 | 543 | |
463888ab РИ |
544 | signal-event EVENTID |
545 | Signal ("set") the given MS-Windows event object. This is used in | |
546 | conjunction with the Windows JIT debugging (AeDebug) support, where | |
547 | the OS suspends a crashing process until a debugger can attach to | |
548 | it. Resuming the crashing process, in order to debug it, is done by | |
549 | signalling an event. | |
550 | ||
c37c0ba6 MK |
551 | * Support for tracepoints and fast tracepoints on s390-linux and s390x-linux |
552 | was added in GDBserver, including JIT compiling fast tracepoint's | |
553 | conditional expression bytecode into native code. | |
554 | ||
f7c38292 PA |
555 | * Support for various remote target protocols and ROM monitors has |
556 | been removed: | |
557 | ||
558 | target m32rsdi Remote M32R debugging over SDI | |
559 | target mips MIPS remote debugging protocol | |
560 | target pmon PMON ROM monitor | |
561 | target ddb NEC's DDB variant of PMON for Vr4300 | |
562 | target rockhopper NEC RockHopper variant of PMON | |
563 | target lsi LSI variant of PMO | |
564 | ||
22084c42 MK |
565 | * Support for tracepoints and fast tracepoints on powerpc-linux, |
566 | powerpc64-linux, and powerpc64le-linux was added in GDBserver, | |
567 | including JIT compiling fast tracepoint's conditional expression | |
568 | bytecode into native code. | |
569 | ||
38b022b4 SM |
570 | * MI async record =record-started now includes the method and format used for |
571 | recording. For example: | |
572 | ||
573 | =record-started,thread-group="i1",method="btrace",format="bts" | |
574 | ||
4034d0ff AT |
575 | * MI async record =thread-selected now includes the frame field. For example: |
576 | ||
577 | =thread-selected,id="3",frame={level="0",addr="0x00000000004007c0"} | |
578 | ||
a28d8e50 YTL |
579 | * New targets |
580 | ||
581 | Andes NDS32 nds32*-*-elf | |
582 | ||
1233c0ba | 583 | *** Changes in GDB 7.11 |
7c79d316 | 584 | |
6e9567fe JB |
585 | * GDB now supports debugging kernel-based threads on FreeBSD. |
586 | ||
5d5658a1 PA |
587 | * Per-inferior thread numbers |
588 | ||
589 | Thread numbers are now per inferior instead of global. If you're | |
590 | debugging multiple inferiors, GDB displays thread IDs using a | |
591 | qualified INF_NUM.THR_NUM form. For example: | |
592 | ||
593 | (gdb) info threads | |
594 | Id Target Id Frame | |
595 | 1.1 Thread 0x7ffff7fc2740 (LWP 8155) (running) | |
596 | 1.2 Thread 0x7ffff7fc1700 (LWP 8168) (running) | |
597 | * 2.1 Thread 0x7ffff7fc2740 (LWP 8157) (running) | |
598 | 2.2 Thread 0x7ffff7fc1700 (LWP 8190) (running) | |
599 | ||
600 | As consequence, thread numbers as visible in the $_thread | |
601 | convenience variable and in Python's InferiorThread.num attribute | |
602 | are no longer unique between inferiors. | |
603 | ||
604 | GDB now maintains a second thread ID per thread, referred to as the | |
605 | global thread ID, which is the new equivalent of thread numbers in | |
663f6d42 | 606 | previous releases. See also $_gthread below. |
5d5658a1 PA |
607 | |
608 | For backwards compatibility, MI's thread IDs always refer to global | |
609 | IDs. | |
610 | ||
611 | * Commands that accept thread IDs now accept the qualified | |
612 | INF_NUM.THR_NUM form as well. For example: | |
613 | ||
614 | (gdb) thread 2.1 | |
615 | [Switching to thread 2.1 (Thread 0x7ffff7fc2740 (LWP 8157))] (running) | |
616 | (gdb) | |
617 | ||
71ef29a8 PA |
618 | * In commands that accept a list of thread IDs, you can now refer to |
619 | all threads of an inferior using a star wildcard. GDB accepts | |
620 | "INF_NUM.*", to refer to all threads of inferior INF_NUM, and "*" to | |
621 | refer to all threads of the current inferior. For example, "info | |
622 | threads 2.*". | |
623 | ||
c84f6bbf PA |
624 | * You can use "info threads -gid" to display the global thread ID of |
625 | all threads. | |
626 | ||
663f6d42 PA |
627 | * The new convenience variable $_gthread holds the global number of |
628 | the current thread. | |
629 | ||
e3940304 PA |
630 | * The new convenience variable $_inferior holds the number of the |
631 | current inferior. | |
632 | ||
f303dbd6 PA |
633 | * GDB now displays the ID and name of the thread that hit a breakpoint |
634 | or received a signal, if your program is multi-threaded. For | |
635 | example: | |
636 | ||
637 | Thread 3 "bar" hit Breakpoint 1 at 0x40087a: file program.c, line 20. | |
638 | Thread 1 "main" received signal SIGINT, Interrupt. | |
639 | ||
cbb55fa7 MM |
640 | * Record btrace now supports non-stop mode. |
641 | ||
58d2eda5 PL |
642 | * Support for tracepoints on aarch64-linux was added in GDBserver. |
643 | ||
da8c46d2 | 644 | * The 'record instruction-history' command now indicates speculative execution |
bc504a31 | 645 | when using the Intel Processor Trace recording format. |
da8c46d2 | 646 | |
629500fa KS |
647 | * GDB now allows users to specify explicit locations, bypassing |
648 | the linespec parser. This feature is also available to GDB/MI | |
649 | clients. | |
650 | ||
02f024f9 YQ |
651 | * Multi-architecture debugging is supported on AArch64 GNU/Linux. |
652 | GDB now is able to debug both AArch64 applications and ARM applications | |
653 | at the same time. | |
654 | ||
4d9d419e PL |
655 | * Support for fast tracepoints on aarch64-linux was added in GDBserver, |
656 | including JIT compiling fast tracepoint's conditional expression bytecode | |
657 | into native code. | |
658 | ||
eda14cf2 YQ |
659 | * GDB now supports displaced stepping on AArch64 GNU/Linux. |
660 | ||
be81798b PA |
661 | * "info threads", "info inferiors", "info display", "info checkpoints" |
662 | and "maint info program-spaces" now list the corresponding items in | |
663 | ascending ID order, for consistency with all other "info" commands. | |
664 | ||
3685b09f PMR |
665 | * In Ada, the overloads selection menu has been enhanced to display the |
666 | parameter types and the return types for the matching overloaded subprograms. | |
667 | ||
fbea99ea PA |
668 | * New commands |
669 | ||
670 | maint set target-non-stop (on|off|auto) | |
671 | maint show target-non-stop | |
672 | Control whether GDB targets always operate in non-stop mode even if | |
673 | "set non-stop" is "off". The default is "auto", meaning non-stop | |
674 | mode is enabled if supported by the target. | |
675 | ||
18989b3c AB |
676 | maint set bfd-sharing |
677 | maint show bfd-sharing | |
678 | Control the reuse of bfd objects. | |
679 | ||
566f5e3b AB |
680 | set debug bfd-cache |
681 | show debug bfd-cache | |
682 | Control display of debugging info regarding bfd caching. | |
683 | ||
6e9567fe JB |
684 | set debug fbsd-lwp |
685 | show debug fbsd-lwp | |
686 | Control display of debugging info regarding FreeBSD threads. | |
687 | ||
73b8c1fd PA |
688 | set remote multiprocess-extensions-packet |
689 | show remote multiprocess-extensions-packet | |
690 | Set/show the use of the remote protocol multiprocess extensions. | |
691 | ||
65706a29 PA |
692 | set remote thread-events |
693 | show remote thread-events | |
694 | Set/show the use of thread create/exit events. | |
695 | ||
3685b09f PMR |
696 | set ada print-signatures on|off |
697 | show ada print-signatures" | |
698 | Control whether parameter types and return types are displayed in overloads | |
699 | selection menus. It is activaled (@code{on}) by default. | |
700 | ||
5fdf6324 AB |
701 | set max-value-size |
702 | show max-value-size | |
703 | Controls the maximum size of memory, in bytes, that GDB will | |
704 | allocate for value contents. Prevents incorrect programs from | |
705 | causing GDB to allocate overly large buffers. Default is 64k. | |
706 | ||
6ff0ba5f DE |
707 | * The "disassemble" command accepts a new modifier: /s. |
708 | It prints mixed source+disassembly like /m with two differences: | |
709 | - disassembled instructions are now printed in program order, and | |
710 | - and source for all relevant files is now printed. | |
711 | The "/m" option is now considered deprecated: its "source-centric" | |
712 | output hasn't proved useful in practice. | |
713 | ||
0c532a29 MM |
714 | * The "record instruction-history" command accepts a new modifier: /s. |
715 | It behaves exactly like /m and prints mixed source+disassembly. | |
716 | ||
f2665db5 MM |
717 | * The "set scheduler-locking" command supports a new mode "replay". |
718 | It behaves like "off" in record mode and like "on" in replay mode. | |
719 | ||
40e0b271 PA |
720 | * Support for various ROM monitors has been removed: |
721 | ||
722 | target dbug dBUG ROM monitor for Motorola ColdFire | |
723 | target picobug Motorola picobug monitor | |
724 | target dink32 DINK32 ROM monitor for PowerPC | |
725 | target m32r Renesas M32R/D ROM monitor | |
726 | target mon2000 mon2000 ROM monitor | |
727 | target ppcbug PPCBUG ROM monitor for PowerPC | |
728 | ||
fd2ae5d6 | 729 | * Support for reading/writing memory and extracting values on architectures |
d63dd61e | 730 | whose memory is addressable in units of any integral multiple of 8 bits. |
fd2ae5d6 | 731 | |
9f757bf7 XR |
732 | catch handlers |
733 | Allows to break when an Ada exception is handled. | |
734 | ||
b459a59b DB |
735 | * New remote packets |
736 | ||
737 | exec stop reason | |
738 | Indicates that an exec system call was executed. | |
739 | ||
740 | exec-events feature in qSupported | |
741 | The qSupported packet allows GDB to request support for exec | |
742 | events using the new 'gdbfeature' exec-event, and the qSupported | |
743 | response can contain the corresponding 'stubfeature'. Set and | |
744 | show commands can be used to display whether these features are enabled. | |
745 | ||
de979965 PA |
746 | vCtrlC |
747 | Equivalent to interrupting with the ^C character, but works in | |
748 | non-stop mode. | |
749 | ||
65706a29 PA |
750 | thread created stop reason (T05 create:...) |
751 | Indicates that the thread was just created and is stopped at entry. | |
752 | ||
753 | thread exit stop reply (w exitcode;tid) | |
754 | Indicates that the thread has terminated. | |
755 | ||
756 | QThreadEvents | |
757 | Enables/disables thread create and exit event reporting. For | |
758 | example, this is used in non-stop mode when GDB stops a set of | |
759 | threads and synchronously waits for the their corresponding stop | |
760 | replies. Without exit events, if one of the threads exits, GDB | |
761 | would hang forever not knowing that it should no longer expect a | |
762 | stop for that same thread. | |
763 | ||
f2faf941 | 764 | N stop reply |
f2faf941 PA |
765 | Indicates that there are no resumed threads left in the target (all |
766 | threads are stopped). The remote stub reports support for this stop | |
767 | reply to GDB's qSupported query. | |
768 | ||
aab3c527 JK |
769 | QCatchSyscalls |
770 | Enables/disables catching syscalls from the inferior process. | |
771 | The remote stub reports support for this packet to GDB's qSupported query. | |
82075af2 JS |
772 | |
773 | syscall_entry stop reason | |
774 | Indicates that a syscall was just called. | |
775 | ||
776 | syscall_return stop reason | |
777 | Indicates that a syscall just returned. | |
778 | ||
b459a59b DB |
779 | * Extended-remote exec events |
780 | ||
781 | ** GDB now has support for exec events on extended-remote Linux targets. | |
782 | For such targets with Linux kernels 2.5.46 and later, this enables | |
783 | follow-exec-mode and exec catchpoints. | |
784 | ||
785 | set remote exec-event-feature-packet | |
786 | show remote exec-event-feature-packet | |
787 | Set/show the use of the remote exec event feature. | |
788 | ||
79efa585 SM |
789 | * Thread names in remote protocol |
790 | ||
791 | The reply to qXfer:threads:read may now include a name attribute for each | |
792 | thread. | |
793 | ||
19d9d4ef DB |
794 | * Target remote mode fork and exec events |
795 | ||
796 | ** GDB now has support for fork and exec events on target remote mode | |
797 | Linux targets. For such targets with Linux kernels 2.5.46 and later, | |
798 | this enables follow-fork-mode, detach-on-fork, follow-exec-mode, and | |
799 | fork and exec catchpoints. | |
800 | ||
82075af2 JS |
801 | * Remote syscall events |
802 | ||
803 | ** GDB now has support for catch syscall on remote Linux targets, | |
804 | currently enabled on x86/x86_64 architectures. | |
805 | ||
806 | set remote catch-syscall-packet | |
807 | show remote catch-syscall-packet | |
808 | Set/show the use of the remote catch syscall feature. | |
809 | ||
1c35a88f LM |
810 | * MI changes |
811 | ||
812 | ** The -var-set-format command now accepts the zero-hexadecimal | |
813 | format. It outputs data in hexadecimal format with zero-padding on the | |
814 | left. | |
815 | ||
84654457 PA |
816 | * Python Scripting |
817 | ||
22a02324 PA |
818 | ** gdb.InferiorThread objects have a new attribute "global_num", |
819 | which refers to the thread's global thread ID. The existing | |
820 | "num" attribute now refers to the thread's per-inferior number. | |
821 | See "Per-inferior thread numbers" above. | |
84654457 PA |
822 | ** gdb.InferiorThread objects have a new attribute "inferior", which |
823 | is the Inferior object the thread belongs to. | |
824 | ||
7c79d316 | 825 | *** Changes in GDB 7.10 |
df8411da | 826 | |
c16a3f52 OJ |
827 | * Support for process record-replay and reverse debugging on aarch64*-linux* |
828 | targets has been added. GDB now supports recording of A64 instruction set | |
829 | including advance SIMD instructions. | |
830 | ||
18a94d75 DE |
831 | * Support for Sun's version of the "stabs" debug file format has been removed. |
832 | ||
df8411da SDJ |
833 | * GDB now honors the content of the file /proc/PID/coredump_filter |
834 | (PID is the process ID) on GNU/Linux systems. This file can be used | |
835 | to specify the types of memory mappings that will be included in a | |
836 | corefile. For more information, please refer to the manual page of | |
837 | "core(5)". GDB also has a new command: "set use-coredump-filter | |
838 | on|off". It allows to set whether GDB will read the content of the | |
839 | /proc/PID/coredump_filter file when generating a corefile. | |
3b2f13ff | 840 | |
d33279b3 AT |
841 | * The "info os" command on GNU/Linux can now display information on |
842 | cpu information : | |
843 | "info os cpus" Listing of all cpus/cores on the system | |
844 | ||
236af5e3 YG |
845 | * GDB has two new commands: "set serial parity odd|even|none" and |
846 | "show serial parity". These allows to set or show parity for the | |
847 | remote serial I/O. | |
848 | ||
b6577aab DE |
849 | * The "info source" command now displays the producer string if it was |
850 | present in the debug info. This typically includes the compiler version | |
851 | and may include things like its command line arguments. | |
852 | ||
b30a0bc3 JB |
853 | * The "info dll", an alias of the "info sharedlibrary" command, |
854 | is now available on all platforms. | |
855 | ||
599bd15c GB |
856 | * Directory names supplied to the "set sysroot" commands may be |
857 | prefixed with "target:" to tell GDB to access shared libraries from | |
858 | the target system, be it local or remote. This replaces the prefix | |
859 | "remote:". The default sysroot has been changed from "" to | |
860 | "target:". "remote:" is automatically converted to "target:" for | |
861 | backward compatibility. | |
862 | ||
a9a5a3d1 GB |
863 | * The system root specified by "set sysroot" will be prepended to the |
864 | filename of the main executable (if reported to GDB as absolute by | |
865 | the operating system) when starting processes remotely, and when | |
866 | attaching to already-running local or remote processes. | |
867 | ||
1b6e6f5c GB |
868 | * GDB now supports automatic location and retrieval of executable |
869 | files from remote targets. Remote debugging can now be initiated | |
870 | using only a "target remote" or "target extended-remote" command | |
871 | (no "set sysroot" or "file" commands are required). See "New remote | |
872 | packets" below. | |
873 | ||
cf75d6c3 AB |
874 | * The "dump" command now supports verilog hex format. |
875 | ||
417c80f9 AA |
876 | * GDB now supports the vector ABI on S/390 GNU/Linux targets. |
877 | ||
51aad7cc GB |
878 | * On GNU/Linux, GDB and gdbserver are now able to access executable |
879 | and shared library files without a "set sysroot" command when | |
880 | attaching to processes running in different mount namespaces from | |
881 | the debugger. This makes it possible to attach to processes in | |
882 | containers as simply as "gdb -p PID" or "gdbserver --attach PID". | |
883 | See "New remote packets" below. | |
884 | ||
51f0e40d AB |
885 | * The "tui reg" command now provides completion for all of the |
886 | available register groups, including target specific groups. | |
887 | ||
b58c513b PP |
888 | * The HISTSIZE environment variable is no longer read when determining |
889 | the size of GDB's command history. GDB now instead reads the dedicated | |
bc460514 PP |
890 | GDBHISTSIZE environment variable. Setting GDBHISTSIZE to "-1" or to "" now |
891 | disables truncation of command history. Non-numeric values of GDBHISTSIZE | |
892 | are ignored. | |
b58c513b | 893 | |
37442ce1 DE |
894 | * Guile Scripting |
895 | ||
896 | ** Memory ports can now be unbuffered. | |
897 | ||
3a8b707a DE |
898 | * Python Scripting |
899 | ||
900 | ** gdb.Objfile objects have a new attribute "username", | |
901 | which is the name of the objfile as specified by the user, | |
902 | without, for example, resolving symlinks. | |
d11916aa | 903 | ** You can now write frame unwinders in Python. |
59fb7612 SS |
904 | ** gdb.Type objects have a new method "optimized_out", |
905 | returning optimized out gdb.Value instance of this type. | |
4c082a81 SC |
906 | ** gdb.Value objects have new methods "reference_value" and |
907 | "const_value" which return a reference to the value and a | |
908 | "const" version of the value respectively. | |
3a8b707a | 909 | |
f57d2163 DE |
910 | * New commands |
911 | ||
912 | maint print symbol-cache | |
913 | Print the contents of the symbol cache. | |
914 | ||
915 | maint print symbol-cache-statistics | |
916 | Print statistics of symbol cache usage. | |
917 | ||
918 | maint flush-symbol-cache | |
919 | Flush the contents of the symbol cache. | |
920 | ||
f4abbc16 MM |
921 | record btrace bts |
922 | record bts | |
923 | Start branch trace recording using Branch Trace Store (BTS) format. | |
924 | ||
36de76f9 JK |
925 | compile print |
926 | Evaluate expression by using the compiler and print result. | |
927 | ||
a4ea0946 AB |
928 | tui enable |
929 | tui disable | |
930 | Explicit commands for enabling and disabling tui mode. | |
931 | ||
29c1c244 WT |
932 | show mpx bound |
933 | set mpx bound on i386 and amd64 | |
bc504a31 | 934 | Support for bound table investigation on Intel MPX enabled applications. |
29c1c244 | 935 | |
b20a6524 MM |
936 | record btrace pt |
937 | record pt | |
bc504a31 | 938 | Start branch trace recording using Intel Processor Trace format. |
b20a6524 | 939 | |
b0627500 MM |
940 | maint info btrace |
941 | Print information about branch tracing internals. | |
942 | ||
943 | maint btrace packet-history | |
944 | Print the raw branch tracing data. | |
945 | ||
946 | maint btrace clear-packet-history | |
947 | Discard the stored raw branch tracing data. | |
948 | ||
949 | maint btrace clear | |
950 | Discard all branch tracing data. It will be fetched and processed | |
951 | anew by the next "record" command. | |
952 | ||
253828f1 JK |
953 | * New options |
954 | ||
b4f54984 DE |
955 | set debug dwarf-die |
956 | Renamed from "set debug dwarf2-die". | |
957 | show debug dwarf-die | |
958 | Renamed from "show debug dwarf2-die". | |
959 | ||
960 | set debug dwarf-read | |
961 | Renamed from "set debug dwarf2-read". | |
962 | show debug dwarf-read | |
963 | Renamed from "show debug dwarf2-read". | |
964 | ||
965 | maint set dwarf always-disassemble | |
966 | Renamed from "maint set dwarf2 always-disassemble". | |
967 | maint show dwarf always-disassemble | |
968 | Renamed from "maint show dwarf2 always-disassemble". | |
969 | ||
970 | maint set dwarf max-cache-age | |
971 | Renamed from "maint set dwarf2 max-cache-age". | |
972 | maint show dwarf max-cache-age | |
973 | Renamed from "maint show dwarf2 max-cache-age". | |
974 | ||
27e0867f DE |
975 | set debug dwarf-line |
976 | show debug dwarf-line | |
977 | Control display of debugging info regarding DWARF line processing. | |
978 | ||
ef0b411a GB |
979 | set max-completions |
980 | show max-completions | |
981 | Set the maximum number of candidates to be considered during | |
982 | completion. The default value is 200. This limit allows GDB | |
983 | to avoid generating large completion lists, the computation of | |
984 | which can cause the debugger to become temporarily unresponsive. | |
985 | ||
fc637f04 PP |
986 | set history remove-duplicates |
987 | show history remove-duplicates | |
988 | Control the removal of duplicate history entries. | |
989 | ||
f57d2163 DE |
990 | maint set symbol-cache-size |
991 | maint show symbol-cache-size | |
992 | Control the size of the symbol cache. | |
993 | ||
d33501a5 MM |
994 | set|show record btrace bts buffer-size |
995 | Set and show the size of the ring buffer used for branch tracing in | |
996 | BTS format. | |
997 | The obtained size may differ from the requested size. Use "info | |
998 | record" to see the obtained buffer size. | |
999 | ||
7a6a1731 GB |
1000 | set debug linux-namespaces |
1001 | show debug linux-namespaces | |
1002 | Control display of debugging info regarding Linux namespaces. | |
1003 | ||
b20a6524 MM |
1004 | set|show record btrace pt buffer-size |
1005 | Set and show the size of the ring buffer used for branch tracing in | |
bc504a31 | 1006 | Intel Processor Trace format. |
b20a6524 MM |
1007 | The obtained size may differ from the requested size. Use "info |
1008 | record" to see the obtained buffer size. | |
1009 | ||
b0627500 MM |
1010 | maint set|show btrace pt skip-pad |
1011 | Set and show whether PAD packets are skipped when computing the | |
1012 | packet history. | |
1013 | ||
253828f1 JK |
1014 | * The command 'thread apply all' can now support new option '-ascending' |
1015 | to call its specified command for all threads in ascending order. | |
1016 | ||
9f050062 DE |
1017 | * Python/Guile scripting |
1018 | ||
1019 | ** GDB now supports auto-loading of Python/Guile scripts contained in the | |
1020 | special section named `.debug_gdb_scripts'. | |
1021 | ||
f4abbc16 MM |
1022 | * New remote packets |
1023 | ||
1024 | qXfer:btrace-conf:read | |
1025 | Return the branch trace configuration for the current thread. | |
1026 | ||
d33501a5 MM |
1027 | Qbtrace-conf:bts:size |
1028 | Set the requested ring buffer size for branch tracing in BTS format. | |
1029 | ||
b20a6524 | 1030 | Qbtrace:pt |
bc504a31 | 1031 | Enable Intel Procesor Trace-based branch tracing for the current |
b20a6524 MM |
1032 | process. The remote stub reports support for this packet to GDB's |
1033 | qSupported query. | |
1034 | ||
1035 | Qbtrace-conf:pt:size | |
bc504a31 | 1036 | Set the requested ring buffer size for branch tracing in Intel Processor |
b20a6524 MM |
1037 | Trace format. |
1038 | ||
f7e6eed5 PA |
1039 | swbreak stop reason |
1040 | Indicates a memory breakpoint instruction was executed, irrespective | |
1041 | of whether it was GDB that planted the breakpoint or the breakpoint | |
1042 | is hardcoded in the program. This is required for correct non-stop | |
1043 | mode operation. | |
1044 | ||
1045 | hwbreak stop reason | |
1046 | Indicates the target stopped for a hardware breakpoint. This is | |
1047 | required for correct non-stop mode operation. | |
1048 | ||
0a93529c GB |
1049 | vFile:fstat: |
1050 | Return information about files on the remote system. | |
1051 | ||
c78fa86a GB |
1052 | qXfer:exec-file:read |
1053 | Return the full absolute name of the file that was executed to | |
1054 | create a process running on the remote system. | |
1055 | ||
15a201c8 GB |
1056 | vFile:setfs: |
1057 | Select the filesystem on which vFile: operations with filename | |
1058 | arguments will operate. This is required for GDB to be able to | |
1059 | access files on remote targets where the remote stub does not | |
1060 | share a common filesystem with the inferior(s). | |
1061 | ||
0d71eef5 DB |
1062 | fork stop reason |
1063 | Indicates that a fork system call was executed. | |
1064 | ||
1065 | vfork stop reason | |
1066 | Indicates that a vfork system call was executed. | |
1067 | ||
1068 | vforkdone stop reason | |
1069 | Indicates that a vfork child of the specified process has executed | |
1070 | an exec or exit, allowing the vfork parent to resume execution. | |
1071 | ||
1072 | fork-events and vfork-events features in qSupported | |
1073 | The qSupported packet allows GDB to request support for fork and | |
1074 | vfork events using new 'gdbfeatures' fork-events and vfork-events, | |
1075 | and the qSupported response can contain the corresponding | |
1076 | 'stubfeatures'. Set and show commands can be used to display | |
1077 | whether these features are enabled. | |
1078 | ||
1079 | * Extended-remote fork events | |
1080 | ||
1081 | ** GDB now has support for fork events on extended-remote Linux | |
1082 | targets. For targets with Linux kernels 2.5.60 and later, this | |
1083 | enables follow-fork-mode and detach-on-fork for both fork and | |
1084 | vfork, as well as fork and vfork catchpoints. | |
1085 | ||
d33501a5 MM |
1086 | * The info record command now shows the recording format and the |
1087 | branch tracing configuration for the current thread when using | |
1088 | the btrace record target. | |
1089 | For the BTS format, it shows the ring buffer size. | |
1090 | ||
b05e3b0d JM |
1091 | * GDB now has support for DTrace USDT (Userland Static Defined |
1092 | Tracing) probes. The supported targets are x86_64-*-linux-gnu. | |
1093 | ||
550bdf96 AA |
1094 | * GDB now supports access to vector registers on S/390 GNU/Linux |
1095 | targets. | |
1096 | ||
4f45d445 JK |
1097 | * Removed command line options |
1098 | ||
1099 | -xdb HP-UX XDB compatibility mode. | |
1100 | ||
0800b440 JK |
1101 | * Removed targets and native configurations |
1102 | ||
1103 | HP/PA running HP-UX hppa*-*-hpux* | |
1104 | Itanium running HP-UX ia64-*-hpux* | |
1105 | ||
58bfce93 MM |
1106 | * New configure options |
1107 | ||
1108 | --with-intel-pt | |
1109 | This configure option allows the user to build GDB with support for | |
bc504a31 | 1110 | Intel Processor Trace (default: auto). This requires libipt. |
58bfce93 MM |
1111 | |
1112 | --with-libipt-prefix=PATH | |
1113 | Specify the path to the version of libipt that GDB should use. | |
1114 | $PATH/include should contain the intel-pt.h header and | |
1115 | $PATH/lib should contain the libipt.so library. | |
1116 | ||
f5f85ab9 JB |
1117 | *** Changes in GDB 7.9.1 |
1118 | ||
1119 | * Python Scripting | |
1120 | ||
1121 | ** Xmethods can now specify a result type. | |
1122 | ||
3b2f13ff | 1123 | *** Changes in GDB 7.9 |
919b9a93 | 1124 | |
05db5edd ST |
1125 | * GDB now supports hardware watchpoints on x86 GNU Hurd. |
1126 | ||
5f3b99cf | 1127 | * Python Scripting |
2b4fd423 DE |
1128 | |
1129 | ** You can now access frame registers from Python scripts. | |
1130 | ** New attribute 'producer' for gdb.Symtab objects. | |
d096d8c1 DE |
1131 | ** gdb.Objfile objects have a new attribute "progspace", |
1132 | which is the gdb.Progspace object of the containing program space. | |
a0be3e44 | 1133 | ** gdb.Objfile objects have a new attribute "owner". |
7c50a931 DE |
1134 | ** gdb.Objfile objects have a new attribute "build_id", |
1135 | which is the build ID generated when the file was built. | |
86e4ed39 | 1136 | ** gdb.Objfile objects have a new method "add_separate_debug_file". |
4ffbba72 DE |
1137 | ** A new event "gdb.clear_objfiles" has been added, triggered when |
1138 | selecting a new file to debug. | |
02be9a71 | 1139 | ** You can now add attributes to gdb.Objfile and gdb.Progspace objects. |
6dddd6a5 | 1140 | ** New function gdb.lookup_objfile. |
5f3b99cf | 1141 | |
8fda9068 YQ |
1142 | New events which are triggered when GDB modifies the state of the |
1143 | inferior. | |
1144 | ||
1145 | ** gdb.events.inferior_call_pre: Function call is about to be made. | |
1146 | ** gdb.events.inferior_call_post: Function call has just been made. | |
1147 | ** gdb.events.memory_changed: A memory location has been altered. | |
1148 | ** gdb.events.register_changed: A register has been altered. | |
1149 | ||
faa42425 DE |
1150 | * New Python-based convenience functions: |
1151 | ||
1152 | ** $_caller_is(name [, number_of_frames]) | |
1153 | ** $_caller_matches(regexp [, number_of_frames]) | |
1154 | ** $_any_caller_is(name [, number_of_frames]) | |
1155 | ** $_any_caller_matches(regexp [, number_of_frames]) | |
1156 | ||
bb2ec1b3 TT |
1157 | * GDB now supports the compilation and injection of source code into |
1158 | the inferior. GDB will use GCC 5.0 or higher built with libcc1.so | |
1159 | to compile the source code to object code, and if successful, inject | |
1160 | and execute that code within the current context of the inferior. | |
1161 | Currently the C language is supported. The commands used to | |
1162 | interface with this new feature are: | |
1163 | ||
1164 | compile code [-raw|-r] [--] [source code] | |
1165 | compile file [-raw|-r] filename | |
1166 | ||
81219e53 DE |
1167 | * New commands |
1168 | ||
439250fb DE |
1169 | demangle [-l language] [--] name |
1170 | Demangle "name" in the specified language, or the current language | |
1171 | if elided. This command is renamed from the "maint demangle" command. | |
1172 | The latter is kept as a no-op to avoid "maint demangle" being interpreted | |
1173 | as "maint demangler-warning". | |
1174 | ||
81219e53 DE |
1175 | queue-signal signal-name-or-number |
1176 | Queue a signal to be delivered to the thread when it is resumed. | |
1177 | ||
f10c5b19 JK |
1178 | add-auto-load-scripts-directory directory |
1179 | Add entries to the list of directories from which to load auto-loaded | |
1180 | scripts. | |
1181 | ||
f5b95c01 AA |
1182 | maint print user-registers |
1183 | List all currently available "user" registers. | |
1184 | ||
bb2ec1b3 TT |
1185 | compile code [-r|-raw] [--] [source code] |
1186 | Compile, inject, and execute in the inferior the executable object | |
1187 | code produced by compiling the provided source code. | |
1188 | ||
1189 | compile file [-r|-raw] filename | |
1190 | Compile and inject into the inferior the executable object code | |
1191 | produced by compiling the source code stored in the filename | |
1192 | provided. | |
1193 | ||
70509625 PA |
1194 | * On resume, GDB now always passes the signal the program had stopped |
1195 | for to the thread the signal was sent to, even if the user changed | |
1196 | threads before resuming. Previously GDB would often (but not | |
1197 | always) deliver the signal to the thread that happens to be current | |
1198 | at resume time. | |
1199 | ||
1200 | * Conversely, the "signal" command now consistently delivers the | |
1201 | requested signal to the current thread. GDB now asks for | |
1202 | confirmation if the program had stopped for a signal and the user | |
1203 | switched threads meanwhile. | |
1204 | ||
a25a5a45 PA |
1205 | * "breakpoint always-inserted" modes "off" and "auto" merged. |
1206 | ||
1207 | Now, when 'breakpoint always-inserted mode' is set to "off", GDB | |
1208 | won't remove breakpoints from the target until all threads stop, | |
1209 | even in non-stop mode. The "auto" mode has been removed, and "off" | |
1210 | is now the default mode. | |
1211 | ||
cc485e62 DE |
1212 | * New options |
1213 | ||
1214 | set debug symbol-lookup | |
1215 | show debug symbol-lookup | |
1216 | Control display of debugging info regarding symbol lookup. | |
1217 | ||
2ddf4301 SM |
1218 | * MI changes |
1219 | ||
1220 | ** The -list-thread-groups command outputs an exit-code field for | |
1221 | inferiors that have exited. | |
1222 | ||
bb7e3f4d YQ |
1223 | * New targets |
1224 | ||
1225 | MIPS SDE mips*-sde*-elf* | |
1226 | ||
3831839c PA |
1227 | * Removed targets |
1228 | ||
1229 | Support for these obsolete configurations has been removed. | |
1230 | ||
5ab806de PA |
1231 | Alpha running OSF/1 (or Tru64) alpha*-*-osf* |
1232 | SGI Irix-5.x mips-*-irix5* | |
1233 | SGI Irix-6.x mips-*-irix6* | |
09dd9a69 PA |
1234 | VAX running (4.2 - 4.3 Reno) BSD vax-*-bsd* |
1235 | VAX running Ultrix vax-*-ultrix* | |
3831839c | 1236 | |
6bf6fd09 JB |
1237 | * The "dll-symbols" command, and its two aliases ("add-shared-symbol-files" |
1238 | and "assf"), have been removed. Use the "sharedlibrary" command, or | |
1239 | its alias "share", instead. | |
1240 | ||
919b9a93 | 1241 | *** Changes in GDB 7.8 |
e9475ead | 1242 | |
8d551b02 DE |
1243 | * New command line options |
1244 | ||
1245 | -D data-directory | |
1246 | This is an alias for the --data-directory option. | |
1247 | ||
e9475ead SA |
1248 | * GDB supports printing and modifying of variable length automatic arrays |
1249 | as specified in ISO C99. | |
1250 | ||
a75fef0e NC |
1251 | * The ARM simulator now supports instruction level tracing |
1252 | with or without disassembly. | |
b7bba001 | 1253 | |
ed3ef339 DE |
1254 | * Guile scripting |
1255 | ||
1256 | GDB now has support for scripting using Guile. Whether this is | |
1257 | available is determined at configure time. | |
1258 | Guile version 2.0 or greater is required. | |
1259 | Guile version 2.0.9 is well tested, earlier 2.0 versions are not. | |
1260 | ||
1261 | * New commands (for set/show, see "New options" below) | |
1262 | ||
1263 | guile [code] | |
1264 | gu [code] | |
1265 | Invoke CODE by passing it to the Guile interpreter. | |
1266 | ||
1267 | guile-repl | |
1268 | gr | |
1269 | Start a Guile interactive prompt (or "repl" for "read-eval-print loop"). | |
1270 | ||
1271 | info auto-load guile-scripts [regexp] | |
1272 | Print the list of automatically loaded Guile scripts. | |
1273 | ||
1274 | * The source command is now capable of sourcing Guile scripts. | |
1275 | This feature is dependent on the debugger being built with Guile support. | |
1276 | ||
c6044dd1 JB |
1277 | * New options |
1278 | ||
770e7fc7 DE |
1279 | set print symbol-loading (off|brief|full) |
1280 | show print symbol-loading | |
1281 | Control whether to print informational messages when loading symbol | |
1282 | information for a file. The default is "full", but when debugging | |
1283 | programs with large numbers of shared libraries the amount of output | |
1284 | becomes less useful. | |
1285 | ||
ed3ef339 DE |
1286 | set guile print-stack (none|message|full) |
1287 | show guile print-stack | |
1288 | Show a stack trace when an error is encountered in a Guile script. | |
1289 | ||
1290 | set auto-load guile-scripts (on|off) | |
1291 | show auto-load guile-scripts | |
1292 | Control auto-loading of Guile script files. | |
1293 | ||
c6044dd1 JB |
1294 | maint ada set ignore-descriptive-types (on|off) |
1295 | maint ada show ignore-descriptive-types | |
1296 | Control whether the debugger should ignore descriptive types in Ada | |
1297 | programs. The default is not to ignore the descriptive types. See | |
1298 | the user manual for more details on descriptive types and the intended | |
1299 | usage of this option. | |
1300 | ||
6a3cb8e8 PA |
1301 | set auto-connect-native-target |
1302 | ||
1303 | Control whether GDB is allowed to automatically connect to the | |
1304 | native target for the run, attach, etc. commands when not connected | |
1305 | to any target yet. See also "target native" below. | |
1306 | ||
67b5c0c1 MM |
1307 | set record btrace replay-memory-access (read-only|read-write) |
1308 | show record btrace replay-memory-access | |
1309 | Control what memory accesses are allowed during replay. | |
1310 | ||
329ea579 PA |
1311 | maint set target-async (on|off) |
1312 | maint show target-async | |
5784b3ca JK |
1313 | This controls whether GDB targets operate in synchronous or |
1314 | asynchronous mode. Normally the default is asynchronous, if it is | |
329ea579 | 1315 | available; but this can be changed to more easily debug problems |
5784b3ca | 1316 | occurring only in synchronous mode. |
329ea579 PA |
1317 | |
1318 | set mi-async (on|off) | |
1319 | show mi-async | |
1320 | Control whether MI asynchronous mode is preferred. This supersedes | |
1321 | "set target-async" of previous GDB versions. | |
1322 | ||
1323 | * "set target-async" is deprecated as a CLI option and is now an alias | |
1324 | for "set mi-async" (only puts MI into async mode). | |
1325 | ||
1326 | * Background execution commands (e.g., "c&", "s&", etc.) are now | |
1327 | possible ``out of the box'' if the target supports them. Previously | |
1328 | the user would need to explicitly enable the possibility with the | |
1329 | "set target-async on" command. | |
1330 | ||
87ce2a04 DE |
1331 | * New features in the GDB remote stub, GDBserver |
1332 | ||
1333 | ** New option --debug-format=option1[,option2,...] allows one to add | |
1334 | additional text to each output. At present only timestamps | |
1335 | are supported: --debug-format=timestamps. | |
1336 | Timestamps can also be turned on with the | |
1337 | "monitor set debug-format timestamps" command from GDB. | |
1338 | ||
5de9129b MM |
1339 | * The 'record instruction-history' command now starts counting instructions |
1340 | at one. This also affects the instruction ranges reported by the | |
1341 | 'record function-call-history' command when given the /i modifier. | |
1342 | ||
8710b709 MM |
1343 | * The command 'record function-call-history' supports a new modifier '/c' to |
1344 | indent the function names based on their call stack depth. | |
1345 | The fields for the '/i' and '/l' modifier have been reordered. | |
1346 | The source line range is now prefixed with 'at'. | |
1347 | The instruction range is now prefixed with 'inst'. | |
1348 | Both ranges are now printed as '<from>, <to>' to allow copy&paste to the | |
1349 | "record instruction-history" and "list" commands. | |
1350 | ||
0688d04e MM |
1351 | * The ranges given as arguments to the 'record function-call-history' and |
1352 | 'record instruction-history' commands are now inclusive. | |
1353 | ||
066ce621 | 1354 | * The btrace record target now supports the 'record goto' command. |
0b722aec MM |
1355 | For locations inside the execution trace, the back trace is computed |
1356 | based on the information stored in the execution trace. | |
066ce621 | 1357 | |
52834460 MM |
1358 | * The btrace record target supports limited reverse execution and replay. |
1359 | The target does not record data and therefore does not allow reading | |
1360 | memory or registers. | |
1361 | ||
237b092b AA |
1362 | * The "catch syscall" command now works on s390*-linux* targets. |
1363 | ||
936d2992 PA |
1364 | * The "compare-sections" command is no longer specific to target |
1365 | remote. It now works with all targets. | |
1366 | ||
930ee1b1 PA |
1367 | * All native targets are now consistently called "native". |
1368 | Consequently, the "target child", "target GNU", "target djgpp", | |
1369 | "target procfs" (Solaris/Irix/OSF/AIX) and "target darwin-child" | |
1370 | commands have been replaced with "target native". The QNX/NTO port | |
1371 | leaves the "procfs" target in place and adds a "native" target for | |
1372 | consistency with other ports. The impact on users should be minimal | |
1373 | as these commands previously either throwed an error, or were | |
1374 | no-ops. The target's name is visible in the output of the following | |
1375 | commands: "help target", "info target", "info files", "maint print | |
1376 | target-stack". | |
1377 | ||
6a3cb8e8 PA |
1378 | * The "target native" command now connects to the native target. This |
1379 | can be used to launch native programs even when "set | |
1380 | auto-connect-native-target" is set to off. | |
1381 | ||
bc504a31 | 1382 | * GDB now supports access to Intel MPX registers on GNU/Linux. |
dc304a94 | 1383 | |
bc504a31 PA |
1384 | * Support for Intel AVX-512 registers on GNU/Linux. |
1385 | Support displaying and modifying Intel AVX-512 registers | |
dc304a94 JK |
1386 | $zmm0 - $zmm31 and $k0 - $k7 on GNU/Linux. |
1387 | ||
969c39fb MM |
1388 | * New remote packets |
1389 | ||
1390 | qXfer:btrace:read's annex | |
1391 | The qXfer:btrace:read packet supports a new annex 'delta' to read | |
1392 | branch trace incrementally. | |
1393 | ||
f7bd0f78 SC |
1394 | * Python Scripting |
1395 | ||
1396 | ** Valid Python operations on gdb.Value objects representing | |
1397 | structs/classes invoke the corresponding overloaded operators if | |
1398 | available. | |
0c6e92a5 SC |
1399 | ** New `Xmethods' feature in the Python API. Xmethods are |
1400 | additional methods or replacements for existing methods of a C++ | |
1401 | class. This feature is useful for those cases where a method | |
1402 | defined in C++ source code could be inlined or optimized out by | |
1403 | the compiler, making it unavailable to GDB. | |
f7bd0f78 | 1404 | |
36c24d95 UW |
1405 | * New targets |
1406 | PowerPC64 GNU/Linux little-endian powerpc64le-*-linux* | |
1407 | ||
95060284 JB |
1408 | * The "dll-symbols" command, and its two aliases ("add-shared-symbol-files" |
1409 | and "assf"), have been deprecated. Use the "sharedlibrary" command, or | |
1410 | its alias "share", instead. | |
1411 | ||
7f3c0343 JB |
1412 | * The commands "set remotebaud" and "show remotebaud" are no longer |
1413 | supported. Use "set serial baud" and "show serial baud" (respectively) | |
1414 | instead. | |
1415 | ||
329ea579 PA |
1416 | * MI changes |
1417 | ||
1418 | ** A new option "-gdb-set mi-async" replaces "-gdb-set | |
1419 | target-async". The latter is left as a deprecated alias of the | |
1420 | former for backward compatibility. If the target supports it, | |
1421 | CLI background execution commands are now always possible by | |
1422 | default, independently of whether the frontend stated a | |
1423 | preference for asynchronous execution with "-gdb-set mi-async". | |
1424 | Previously "-gdb-set target-async off" affected both MI execution | |
1425 | commands and CLI execution commands. | |
1426 | ||
b7bba001 | 1427 | *** Changes in GDB 7.7 |
2d450646 | 1428 | |
33a97bbe OJ |
1429 | * Improved support for process record-replay and reverse debugging on |
1430 | arm*-linux* targets. Support for thumb32 and syscall instruction | |
1431 | recording has been added. | |
1432 | ||
08248ca9 SDJ |
1433 | * GDB now supports SystemTap SDT probes on AArch64 GNU/Linux. |
1434 | ||
73869dc2 DE |
1435 | * GDB now supports Fission DWP file format version 2. |
1436 | http://gcc.gnu.org/wiki/DebugFission | |
1437 | ||
a280dbd1 SDJ |
1438 | * New convenience function "$_isvoid", to check whether an expression |
1439 | is void. A void expression is an expression where the type of the | |
1440 | result is "void". For example, some convenience variables may be | |
1441 | "void" when evaluated (e.g., "$_exitcode" before the execution of | |
1442 | the program being debugged; or an undefined convenience variable). | |
1443 | Another example, when calling a function whose return type is | |
1444 | "void". | |
1445 | ||
52e260a3 DE |
1446 | * The "maintenance print objfiles" command now takes an optional regexp. |
1447 | ||
9f948660 SDJ |
1448 | * The "catch syscall" command now works on arm*-linux* targets. |
1449 | ||
901461f8 PA |
1450 | * GDB now consistently shows "<not saved>" when printing values of |
1451 | registers the debug info indicates have not been saved in the frame | |
1452 | and there's nowhere to retrieve them from | |
1453 | (callee-saved/call-clobbered registers): | |
1454 | ||
1455 | (gdb) p $rax | |
1456 | $1 = <not saved> | |
1457 | ||
1458 | (gdb) info registers rax | |
1459 | rax <not saved> | |
1460 | ||
1461 | Before, the former would print "<optimized out>", and the latter | |
1462 | "*value not available*". | |
1463 | ||
caf26be9 SB |
1464 | * New script contrib/gdb-add-index.sh for adding .gdb_index sections |
1465 | to binaries. | |
1466 | ||
1e611234 PM |
1467 | * Python scripting |
1468 | ||
1469 | ** Frame filters and frame decorators have been added. | |
f76c27b5 | 1470 | ** Temporary breakpoints are now supported. |
bc79de95 | 1471 | ** Line tables representation has been added. |
a16b0e22 SC |
1472 | ** New attribute 'parent_type' for gdb.Field objects. |
1473 | ** gdb.Field objects can be used as subscripts on gdb.Value objects. | |
c0d48811 | 1474 | ** New attribute 'name' for gdb.Type objects. |
1e611234 | 1475 | |
a1217d97 SL |
1476 | * New targets |
1477 | ||
1478 | Nios II ELF nios2*-*-elf | |
1479 | Nios II GNU/Linux nios2*-*-linux | |
42059f0e | 1480 | Texas Instruments MSP430 msp430*-*-elf |
a1217d97 | 1481 | |
2659903b JK |
1482 | * Removed native configurations |
1483 | ||
1484 | Support for these a.out NetBSD and OpenBSD obsolete configurations has | |
1485 | been removed. ELF variants of these configurations are kept supported. | |
1486 | ||
1487 | arm*-*-netbsd* but arm*-*-netbsdelf* is kept supported. | |
1488 | i[34567]86-*-netbsd* but i[34567]86-*-netbsdelf* is kept supported. | |
1489 | i[34567]86-*-openbsd[0-2].* but i[34567]86-*-openbsd* is kept supported. | |
1490 | i[34567]86-*-openbsd3.[0-3] | |
1491 | m68*-*-netbsd* but m68*-*-netbsdelf* is kept supported. | |
1492 | sparc-*-netbsd* but sparc-*-netbsdelf* is kept supported. | |
1493 | vax-*-netbsd* but vax-*-netbsdelf* is kept supported. | |
1494 | ||
bd712aed | 1495 | * New commands: |
b340913d TT |
1496 | catch rethrow |
1497 | Like "catch throw", but catches a re-thrown exception. | |
7d0c9981 DE |
1498 | maint check-psymtabs |
1499 | Renamed from old "maint check-symtabs". | |
1500 | maint check-symtabs | |
1501 | Perform consistency checks on symtabs. | |
1502 | maint expand-symtabs | |
1503 | Expand symtabs matching an optional regexp. | |
b340913d | 1504 | |
dccca75d EZ |
1505 | show configuration |
1506 | Display the details of GDB configure-time options. | |
1507 | ||
bd712aed DE |
1508 | maint set|show per-command |
1509 | maint set|show per-command space | |
1510 | maint set|show per-command time | |
1511 | maint set|show per-command symtab | |
1512 | Enable display of per-command gdb resource usage. | |
1513 | ||
98297bf6 NB |
1514 | remove-symbol-file FILENAME |
1515 | remove-symbol-file -a ADDRESS | |
1516 | Remove a symbol file added via add-symbol-file. The file to remove | |
1517 | can be identified by its filename or by an address that lies within | |
1518 | the boundaries of this symbol file in memory. | |
1519 | ||
58d06528 JB |
1520 | info exceptions |
1521 | info exceptions REGEXP | |
1522 | Display the list of Ada exceptions defined in the program being | |
1523 | debugged. If provided, only the exceptions whose names match REGEXP | |
1524 | are listed. | |
1525 | ||
bd3eecc3 PA |
1526 | * New options |
1527 | ||
8fb8eb5c DE |
1528 | set debug symfile off|on |
1529 | show debug symfile | |
1530 | Control display of debugging info regarding reading symbol files and | |
1531 | symbol tables within those files | |
1532 | ||
e7045703 DE |
1533 | set print raw frame-arguments |
1534 | show print raw frame-arguments | |
1535 | Set/show whether to print frame arguments in raw mode, | |
1536 | disregarding any defined pretty-printers. | |
1537 | ||
bd3eecc3 PA |
1538 | set remote trace-status-packet |
1539 | show remote trace-status-packet | |
1540 | Set/show the use of remote protocol qTStatus packet. | |
1541 | ||
a1217d97 SL |
1542 | set debug nios2 |
1543 | show debug nios2 | |
1544 | Control display of debugging messages related to Nios II targets. | |
1545 | ||
c1e36e3e PA |
1546 | set range-stepping |
1547 | show range-stepping | |
1548 | Control whether target-assisted range stepping is enabled. | |
1549 | ||
98882a26 PA |
1550 | set startup-with-shell |
1551 | show startup-with-shell | |
1552 | Specifies whether Unix child processes are started via a shell or | |
1553 | directly. | |
1554 | ||
29453a14 YQ |
1555 | set code-cache |
1556 | show code-cache | |
1557 | Use the target memory cache for accesses to the code segment. This | |
1558 | improves performance of remote debugging (particularly disassembly). | |
1559 | ||
1c2e4450 PA |
1560 | * You can now use a literal value 'unlimited' for options that |
1561 | interpret 0 or -1 as meaning "unlimited". E.g., "set | |
1562 | trace-buffer-size unlimited" is now an alias for "set | |
1563 | trace-buffer-size -1" and "set height unlimited" is now an alias for | |
1564 | "set height 0". | |
1565 | ||
db0fec5c DE |
1566 | * The "set debug symtab-create" debugging option of GDB has been changed to |
1567 | accept a verbosity level. 0 means "off", 1 provides basic debugging | |
1568 | output, and values of 2 or greater provides more verbose output. | |
1569 | ||
dccca75d EZ |
1570 | * New command-line options |
1571 | --configuration | |
1572 | Display the details of GDB configure-time options. | |
1573 | ||
d0353e76 YQ |
1574 | * The command 'tsave' can now support new option '-ctf' to save trace |
1575 | buffer in Common Trace Format. | |
1576 | ||
b292c783 JK |
1577 | * Newly installed $prefix/bin/gcore acts as a shell interface for the |
1578 | GDB command gcore. | |
1579 | ||
6e72ca20 TT |
1580 | * GDB now implements the the C++ 'typeid' operator. |
1581 | ||
b340913d TT |
1582 | * The new convenience variable $_exception holds the exception being |
1583 | thrown or caught at an exception-related catchpoint. | |
1584 | ||
1585 | * The exception-related catchpoints, like "catch throw", now accept a | |
1586 | regular expression which can be used to filter exceptions by type. | |
1587 | ||
0c557179 SDJ |
1588 | * The new convenience variable $_exitsignal is automatically set to |
1589 | the terminating signal number when the program being debugged dies | |
1590 | due to an uncaught signal. | |
1591 | ||
d0353e76 YQ |
1592 | * MI changes |
1593 | ||
403cb6b1 | 1594 | ** All MI commands now accept an optional "--language" option. |
4e35e808 JB |
1595 | Support for this feature can be verified by using the "-list-features" |
1596 | command, which should contain "language-option". | |
403cb6b1 | 1597 | |
6b7cbff1 JB |
1598 | ** The new command -info-gdb-mi-command allows the user to determine |
1599 | whether a GDB/MI command is supported or not. | |
1600 | ||
2ea126fa JB |
1601 | ** The "^error" result record returned when trying to execute an undefined |
1602 | GDB/MI command now provides a variable named "code" whose content is the | |
1603 | "undefined-command" error code. Support for this feature can be verified | |
1604 | by using the "-list-features" command, which should contain | |
1605 | "undefined-command-error-code". | |
1606 | ||
d0353e76 YQ |
1607 | ** The -trace-save MI command can optionally save trace buffer in Common |
1608 | Trace Format now. | |
1609 | ||
c5867ab6 HZ |
1610 | ** The new command -dprintf-insert sets a dynamic printf breakpoint. |
1611 | ||
c898adb7 YQ |
1612 | ** The command -data-list-register-values now accepts an optional |
1613 | "--skip-unavailable" option. When used, only the available registers | |
1614 | are displayed. | |
1615 | ||
dc673c81 YQ |
1616 | ** The new command -trace-frame-collected dumps collected variables, |
1617 | computed expressions, tvars, memory and registers in a traceframe. | |
1618 | ||
6211c335 YQ |
1619 | ** The commands -stack-list-locals, -stack-list-arguments and |
1620 | -stack-list-variables now accept an option "--skip-unavailable". | |
1621 | When used, only the available locals or arguments are displayed. | |
1622 | ||
5713b9b5 JB |
1623 | ** The -exec-run command now accepts an optional "--start" option. |
1624 | When used, the command follows the same semantics as the "start" | |
1625 | command, stopping the program's execution at the start of its | |
72bfa06c JB |
1626 | main subprogram. Support for this feature can be verified using |
1627 | the "-list-features" command, which should contain | |
1628 | "exec-run-start-option". | |
5713b9b5 | 1629 | |
40555925 JB |
1630 | ** The new commands -catch-assert and -catch-exceptions insert |
1631 | catchpoints stopping the program when Ada exceptions are raised. | |
1632 | ||
58d06528 JB |
1633 | ** The new command -info-ada-exceptions provides the equivalent of |
1634 | the new "info exceptions" command. | |
1635 | ||
0201faac JB |
1636 | * New system-wide configuration scripts |
1637 | A GDB installation now provides scripts suitable for use as system-wide | |
1638 | configuration scripts for the following systems: | |
1639 | ** ElinOS | |
1640 | ** Wind River Linux | |
1641 | ||
c1e36e3e PA |
1642 | * GDB now supports target-assigned range stepping with remote targets. |
1643 | This improves the performance of stepping source lines by reducing | |
1644 | the number of control packets from/to GDB. See "New remote packets" | |
1645 | below. | |
1646 | ||
28a93511 YQ |
1647 | * GDB now understands the element 'tvar' in the XML traceframe info. |
1648 | It has the id of the collected trace state variables. | |
1649 | ||
4ac33720 UW |
1650 | * On S/390 targets that provide the transactional-execution feature, |
1651 | the program interruption transaction diagnostic block (TDB) is now | |
1652 | represented as a number of additional "registers" in GDB. | |
1653 | ||
c1e36e3e PA |
1654 | * New remote packets |
1655 | ||
1656 | vCont;r | |
1657 | ||
1658 | The vCont packet supports a new 'r' action, that tells the remote | |
1659 | stub to step through an address range itself, without GDB | |
1660 | involvemement at each single-step. | |
1661 | ||
7f91dbec GB |
1662 | qXfer:libraries-svr4:read's annex |
1663 | The previously unused annex of the qXfer:libraries-svr4:read packet | |
1664 | is now used to support passing an argument list. The remote stub | |
1665 | reports support for this argument list to GDB's qSupported query. | |
1666 | The defined arguments are "start" and "prev", used to reduce work | |
1667 | necessary for library list updating, resulting in significant | |
1668 | speedup. | |
1669 | ||
c2d6af84 PA |
1670 | * New features in the GDB remote stub, GDBserver |
1671 | ||
1672 | ** GDBserver now supports target-assisted range stepping. Currently | |
1673 | enabled on x86/x86_64 GNU/Linux targets. | |
1674 | ||
28a93511 YQ |
1675 | ** GDBserver now adds element 'tvar' in the XML in the reply to |
1676 | 'qXfer:traceframe-info:read'. It has the id of the collected | |
1677 | trace state variables. | |
1678 | ||
7a60ad40 YQ |
1679 | ** GDBserver now supports hardware watchpoints on the MIPS GNU/Linux |
1680 | target. | |
1681 | ||
6fbe845e AB |
1682 | * New 'z' formatter for printing and examining memory, this displays the |
1683 | value as hexadecimal zero padded on the left to the size of the type. | |
1684 | ||
9058cc3a TG |
1685 | * GDB can now use Windows x64 unwinding data. |
1686 | ||
0d12017b JB |
1687 | * The "set remotebaud" command has been replaced by "set serial baud". |
1688 | Similarly, "show remotebaud" has been replaced by "show serial baud". | |
1689 | The "set remotebaud" and "show remotebaud" commands are still available | |
1690 | to provide backward compatibility with older versions of GDB. | |
1691 | ||
2d450646 | 1692 | *** Changes in GDB 7.6 |
80c8d323 | 1693 | |
59ea5688 MM |
1694 | * Target record has been renamed to record-full. |
1695 | Record/replay is now enabled with the "record full" command. | |
1696 | This also affects settings that are associated with full record/replay | |
1697 | that have been moved from "set/show record" to "set/show record full": | |
1698 | ||
1699 | set|show record full insn-number-max | |
1700 | set|show record full stop-at-limit | |
1701 | set|show record full memory-query | |
1702 | ||
1703 | * A new record target "record-btrace" has been added. The new target | |
1704 | uses hardware support to record the control-flow of a process. It | |
1705 | does not support replaying the execution, but it implements the | |
1706 | below new commands for investigating the recorded execution log. | |
1707 | This new recording method can be enabled using: | |
1708 | ||
1709 | record btrace | |
1710 | ||
1711 | The "record-btrace" target is only available on Intel Atom processors | |
1712 | and requires a Linux kernel 2.6.32 or later. | |
1713 | ||
1714 | * Two new commands have been added for record/replay to give information | |
1715 | about the recorded execution without having to replay the execution. | |
1716 | The commands are only supported by "record btrace". | |
1717 | ||
1718 | record instruction-history prints the execution history at | |
1719 | instruction granularity | |
1720 | ||
1721 | record function-call-history prints the execution history at | |
1722 | function granularity | |
1723 | ||
543bf33d AT |
1724 | * New native configurations |
1725 | ||
51d66578 | 1726 | ARM AArch64 GNU/Linux aarch64*-*-linux-gnu |
543bf33d | 1727 | FreeBSD/powerpc powerpc*-*-freebsd |
4f4352f7 | 1728 | x86_64/Cygwin x86_64-*-cygwin* |
ea5f3910 | 1729 | Tilera TILE-Gx GNU/Linux tilegx*-*-linux-gnu |
543bf33d | 1730 | |
249729c4 JB |
1731 | * New targets |
1732 | ||
51d66578 MS |
1733 | ARM AArch64 aarch64*-*-elf |
1734 | ARM AArch64 GNU/Linux aarch64*-*-linux | |
249729c4 | 1735 | Lynx 178 PowerPC powerpc-*-lynx*178 |
3c095f49 | 1736 | x86_64/Cygwin x86_64-*-cygwin* |
ea5f3910 | 1737 | Tilera TILE-Gx GNU/Linux tilegx*-*-linux |
249729c4 | 1738 | |
e64e0392 DE |
1739 | * If the configured location of system.gdbinit file (as given by the |
1740 | --with-system-gdbinit option at configure time) is in the | |
1741 | data-directory (as specified by --with-gdb-datadir at configure | |
1742 | time) or in one of its subdirectories, then GDB will look for the | |
1743 | system-wide init file in the directory specified by the | |
1744 | --data-directory command-line option. | |
1745 | ||
07540c15 DE |
1746 | * New command line options: |
1747 | ||
1748 | -nh Disables auto-loading of ~/.gdbinit, but still executes all the | |
1749 | other initialization files, unlike -nx which disables all of them. | |
1750 | ||
e93a8774 TT |
1751 | * Removed command line options |
1752 | ||
1753 | -epoch This was used by the gdb mode in Epoch, an ancient fork of | |
1754 | Emacs. | |
1755 | ||
53342f27 TT |
1756 | * The 'ptype' and 'whatis' commands now accept an argument to control |
1757 | type formatting. | |
1758 | ||
451b7c33 TT |
1759 | * 'info proc' now works on some core files. |
1760 | ||
a72c3253 DE |
1761 | * Python scripting |
1762 | ||
1763 | ** Vectors can be created with gdb.Type.vector. | |
1764 | ||
d7de8e3c TT |
1765 | ** Python's atexit.register now works in GDB. |
1766 | ||
18a9fc12 TT |
1767 | ** Types can be pretty-printed via a Python API. |
1768 | ||
9a27f2c6 PK |
1769 | ** Python 3 is now supported (in addition to Python 2.4 or later) |
1770 | ||
bea883fd SCR |
1771 | ** New class gdb.Architecture exposes GDB's internal representation |
1772 | of architecture in the Python API. | |
1773 | ||
1774 | ** New method Frame.architecture returns the gdb.Architecture object | |
1775 | corresponding to the frame's architecture. | |
1776 | ||
a72c3253 DE |
1777 | * New Python-based convenience functions: |
1778 | ||
1779 | ** $_memeq(buf1, buf2, length) | |
1780 | ** $_streq(str1, str2) | |
1781 | ** $_strlen(str) | |
1782 | ** $_regex(str, regex) | |
1783 | ||
f3c8a52a JK |
1784 | * The 'cd' command now defaults to using '~' (the home directory) if not |
1785 | given an argument. | |
1786 | ||
1605ef26 TT |
1787 | * The C++ ABI now defaults to the GNU v3 ABI. This has been the |
1788 | default for GCC since November 2000. | |
1789 | ||
504b36fd YQ |
1790 | * The command 'forward-search' can now be abbreviated as 'fo'. |
1791 | ||
f2a8bc8a YQ |
1792 | * The command 'info tracepoints' can now display 'installed on target' |
1793 | or 'not installed on target' for each non-pending location of tracepoint. | |
1794 | ||
23a80689 JB |
1795 | * New configure options |
1796 | ||
1797 | --enable-libmcheck/--disable-libmcheck | |
1798 | By default, development versions are built with -lmcheck on hosts | |
1799 | that support it, in order to help track memory corruption issues. | |
1800 | Release versions, on the other hand, are built without -lmcheck | |
1801 | by default. The --enable-libmcheck/--disable-libmcheck configure | |
1802 | options allow the user to override that default. | |
393fd4c3 YQ |
1803 | --with-babeltrace/--with-babeltrace-include/--with-babeltrace-lib |
1804 | This configure option allows the user to build GDB with | |
1805 | libbabeltrace using which GDB can read Common Trace Format data. | |
23a80689 | 1806 | |
d6b28940 TT |
1807 | * New commands (for set/show, see "New options" below) |
1808 | ||
ab04a2af TT |
1809 | catch signal |
1810 | Catch signals. This is similar to "handle", but allows commands and | |
1811 | conditions to be attached. | |
1812 | ||
d6b28940 TT |
1813 | maint info bfds |
1814 | List the BFDs known to GDB. | |
1815 | ||
8315665e YPK |
1816 | python-interactive [command] |
1817 | pi [command] | |
1818 | Start a Python interactive prompt, or evaluate the optional command | |
1819 | and print the result of expressions. | |
1820 | ||
1821 | py [command] | |
1822 | "py" is a new alias for "python". | |
1823 | ||
18a9fc12 TT |
1824 | enable type-printer [name]... |
1825 | disable type-printer [name]... | |
1826 | Enable or disable type printers. | |
1827 | ||
aa9259cc TS |
1828 | * Removed commands |
1829 | ||
1830 | ** For the Renesas Super-H architecture, the "regs" command has been removed | |
1831 | (has been deprecated in GDB 7.5), and "info all-registers" should be used | |
1832 | instead. | |
1833 | ||
53342f27 TT |
1834 | * New options |
1835 | ||
1836 | set print type methods (on|off) | |
1837 | show print type methods | |
1838 | Control whether method declarations are displayed by "ptype". | |
1839 | The default is to show them. | |
1840 | ||
1841 | set print type typedefs (on|off) | |
1842 | show print type typedefs | |
1843 | Control whether typedef definitions are displayed by "ptype". | |
1844 | The default is to show them. | |
1845 | ||
1b56eb55 JK |
1846 | set filename-display basename|relative|absolute |
1847 | show filename-display | |
1848 | Control the way in which filenames is displayed. | |
1849 | The default is "relative", which preserves previous behavior. | |
1850 | ||
e9f1758d PA |
1851 | set trace-buffer-size |
1852 | show trace-buffer-size | |
1853 | Request target to change the size of trace buffer. | |
1854 | ||
a46c1e42 PA |
1855 | set remote trace-buffer-size-packet auto|on|off |
1856 | show remote trace-buffer-size-packet | |
1857 | Control the use of the remote protocol `QTBuffer:size' packet. | |
1858 | ||
be9a8770 PA |
1859 | set debug aarch64 |
1860 | show debug aarch64 | |
1861 | Control display of debugging messages related to ARM AArch64. | |
1862 | The default is off. | |
1863 | ||
1864 | set debug coff-pe-read | |
1865 | show debug coff-pe-read | |
1866 | Control display of debugging messages related to reading of COFF/PE | |
1867 | exported symbols. | |
1868 | ||
1869 | set debug mach-o | |
1870 | show debug mach-o | |
1871 | Control display of debugging messages related to Mach-O symbols | |
1872 | processing. | |
1873 | ||
1874 | set debug notification | |
1875 | show debug notification | |
1876 | Control display of debugging info for async remote notification. | |
1877 | ||
5b9afe8a YQ |
1878 | * MI changes |
1879 | ||
1880 | ** Command parameter changes are now notified using new async record | |
1881 | "=cmd-param-changed". | |
201b4506 YQ |
1882 | ** Trace frame changes caused by command "tfind" are now notified using |
1883 | new async record "=traceframe-changed". | |
134a2066 YQ |
1884 | ** The creation, deletion and modification of trace state variables |
1885 | are now notified using new async records "=tsv-created", | |
1886 | "=tsv-deleted" and "=tsv-modified". | |
82a90ccf YQ |
1887 | ** The start and stop of process record are now notified using new |
1888 | async record "=record-started" and "=record-stopped". | |
8de0566d YQ |
1889 | ** Memory changes are now notified using new async record |
1890 | "=memory-changed". | |
ed8a1c2d | 1891 | ** The data-disassemble command response will include a "fullname" field |
ec83d211 | 1892 | containing the absolute file name when source has been requested. |
62747a60 TT |
1893 | ** New optional parameter COUNT added to the "-data-write-memory-bytes" |
1894 | command, to allow pattern filling of memory areas. | |
3fa7bf06 MG |
1895 | ** New commands "-catch-load"/"-catch-unload" added for intercepting |
1896 | library load/unload events. | |
f2a8bc8a YQ |
1897 | ** The response to breakpoint commands and breakpoint async records |
1898 | includes an "installed" field containing a boolean state about each | |
1899 | non-pending tracepoint location is whether installed on target or not. | |
f5911ea1 HAQ |
1900 | ** Output of the "-trace-status" command includes a "trace-file" field |
1901 | containing the name of the trace file being examined. This field is | |
1902 | optional, and only present when examining a trace file. | |
ec83d211 JK |
1903 | ** The "fullname" field is now always present along with the "file" field, |
1904 | even if the file cannot be found by GDB. | |
5b9afe8a | 1905 | |
608e2dbb TT |
1906 | * GDB now supports the "mini debuginfo" section, .gnu_debugdata. |
1907 | You must have the LZMA library available when configuring GDB for this | |
1908 | feature to be enabled. For more information, see: | |
1909 | http://fedoraproject.org/wiki/Features/MiniDebugInfo | |
1910 | ||
f6f899bf HAQ |
1911 | * New remote packets |
1912 | ||
1913 | QTBuffer:size | |
1914 | Set the size of trace buffer. The remote stub reports support for this | |
1915 | packet to gdb's qSupported query. | |
1916 | ||
10782d74 MM |
1917 | Qbtrace:bts |
1918 | Enable Branch Trace Store (BTS)-based branch tracing for the current | |
1919 | thread. The remote stub reports support for this packet to gdb's | |
1920 | qSupported query. | |
1921 | ||
1922 | Qbtrace:off | |
1923 | Disable branch tracing for the current thread. The remote stub reports | |
1924 | support for this packet to gdb's qSupported query. | |
1925 | ||
1926 | qXfer:btrace:read | |
1927 | Read the traced branches for the current thread. The remote stub | |
1928 | reports support for this packet to gdb's qSupported query. | |
1929 | ||
80c8d323 | 1930 | *** Changes in GDB 7.5 |
d6e00af6 | 1931 | |
1b3371b1 L |
1932 | * GDB now supports x32 ABI. Visit <http://sites.google.com/site/x32abi/> |
1933 | for more x32 ABI info. | |
1934 | ||
d0e64392 MR |
1935 | * GDB now supports access to MIPS DSP registers on Linux targets. |
1936 | ||
4cc0665f MR |
1937 | * GDB now supports debugging microMIPS binaries. |
1938 | ||
85d4a676 SS |
1939 | * The "info os" command on GNU/Linux can now display information on |
1940 | several new classes of objects managed by the operating system: | |
1941 | "info os procgroups" lists process groups | |
1942 | "info os files" lists file descriptors | |
1943 | "info os sockets" lists internet-domain sockets | |
1944 | "info os shm" lists shared-memory regions | |
1945 | "info os semaphores" lists semaphores | |
1946 | "info os msg" lists message queues | |
1947 | "info os modules" lists loaded kernel modules | |
1948 | ||
55aa24fb SDJ |
1949 | * GDB now has support for SDT (Static Defined Tracing) probes. Currently, |
1950 | the only implemented backend is for SystemTap probes (<sys/sdt.h>). You | |
1951 | can set a breakpoint using the new "-probe, "-pstap" or "-probe-stap" | |
1952 | options and inspect the probe arguments using the new $_probe_arg family | |
1953 | of convenience variables. You can obtain more information about SystemTap | |
1954 | in <http://sourceware.org/systemtap/>. | |
1955 | ||
72508ac0 PO |
1956 | * GDB now supports reversible debugging on ARM, it allows you to |
1957 | debug basic ARM and THUMB instructions, and provides | |
1958 | record/replay support. | |
1959 | ||
16899756 DE |
1960 | * The option "symbol-reloading" has been deleted as it is no longer used. |
1961 | ||
4795f398 DE |
1962 | * Python scripting |
1963 | ||
7d74f244 DE |
1964 | ** GDB commands implemented in Python can now be put in command class |
1965 | "gdb.COMMAND_USER". | |
1966 | ||
4795f398 DE |
1967 | ** The "maint set python print-stack on|off" is now deleted. |
1968 | ||
50897289 TT |
1969 | ** A new class, gdb.printing.FlagEnumerationPrinter, can be used to |
1970 | apply "flag enum"-style pretty-printing to any enum. | |
1971 | ||
64e7d9dd TT |
1972 | ** gdb.lookup_symbol can now work when there is no current frame. |
1973 | ||
1974 | ** gdb.Symbol now has a 'line' attribute, holding the line number in | |
1975 | the source at which the symbol was defined. | |
1976 | ||
f0823d2c TT |
1977 | ** gdb.Symbol now has the new attribute 'needs_frame' and the new |
1978 | method 'value'. The former indicates whether the symbol needs a | |
1979 | frame in order to compute its value, and the latter computes the | |
1980 | symbol's value. | |
1981 | ||
7b282c5a SCR |
1982 | ** A new method 'referenced_value' on gdb.Value objects which can |
1983 | dereference pointer as well as C++ reference values. | |
1984 | ||
a20ee7a4 SCR |
1985 | ** New methods 'global_block' and 'static_block' on gdb.Symtab objects |
1986 | which return the global and static blocks (as gdb.Block objects), | |
1987 | of the underlying symbol table, respectively. | |
1988 | ||
7efc75aa SCR |
1989 | ** New function gdb.find_pc_line which returns the gdb.Symtab_and_line |
1990 | object associated with a PC value. | |
1991 | ||
ee0bf529 SCR |
1992 | ** gdb.Symtab_and_line has new attribute 'last' which holds the end |
1993 | of the address range occupied by code for the current source line. | |
1994 | ||
a766d390 DE |
1995 | * Go language support. |
1996 | GDB now supports debugging programs written in the Go programming | |
1997 | language. | |
1998 | ||
e0f9f062 DE |
1999 | * GDBserver now supports stdio connections. |
2000 | E.g. (gdb) target remote | ssh myhost gdbserver - hello | |
2001 | ||
217bff3e JK |
2002 | * The binary "gdbtui" can no longer be built or installed. |
2003 | Use "gdb -tui" instead. | |
2004 | ||
cafec441 TT |
2005 | * GDB will now print "flag" enums specially. A flag enum is one where |
2006 | all the enumerator values have no bits in common when pairwise | |
2007 | "and"ed. When printing a value whose type is a flag enum, GDB will | |
2008 | show all the constants, e.g., for enum E { ONE = 1, TWO = 2}: | |
2009 | (gdb) print (enum E) 3 | |
2010 | $1 = (ONE | TWO) | |
2011 | ||
4aac40c8 TT |
2012 | * The filename part of a linespec will now match trailing components |
2013 | of a source file name. For example, "break gcc/expr.c:1000" will | |
2014 | now set a breakpoint in build/gcc/expr.c, but not | |
2015 | build/libcpp/expr.c. | |
2016 | ||
d99bd577 UW |
2017 | * The "info proc" and "generate-core-file" commands will now also |
2018 | work on remote targets connected to GDBserver on Linux. | |
2019 | ||
53fe1783 GB |
2020 | * The command "info catch" has been removed. It has been disabled |
2021 | since December 2007. | |
2022 | ||
e41eec66 JB |
2023 | * The "catch exception" and "catch assert" commands now accept |
2024 | a condition at the end of the command, much like the "break" | |
2025 | command does. For instance: | |
2026 | ||
2027 | (gdb) catch exception Constraint_Error if Barrier = True | |
2028 | ||
2029 | Previously, it was possible to add a condition to such catchpoints, | |
2030 | but it had to be done as a second step, after the catchpoint had been | |
2031 | created, using the "condition" command. | |
2032 | ||
5808517f YQ |
2033 | * The "info static-tracepoint-marker" command will now also work on |
2034 | native Linux targets with in-process agent. | |
2035 | ||
481860b3 GB |
2036 | * GDB can now set breakpoints on inlined functions. |
2037 | ||
2038 | * The .gdb_index section has been updated to include symbols for | |
2039 | inlined functions. GDB will ignore older .gdb_index sections by | |
2040 | default, which could cause symbol files to be loaded more slowly | |
e615022a DE |
2041 | until their .gdb_index sections can be recreated. The new command |
2042 | "set use-deprecated-index-sections on" will cause GDB to use any older | |
2043 | .gdb_index sections it finds. This will restore performance, but the | |
2044 | ability to set breakpoints on inlined functions will be lost in symbol | |
2045 | files with older .gdb_index sections. | |
481860b3 | 2046 | |
156942c7 DE |
2047 | The .gdb_index section has also been updated to record more information |
2048 | about each symbol. This speeds up the "info variables", "info functions" | |
2049 | and "info types" commands when used with programs having the .gdb_index | |
2050 | section, as well as speeding up debugging with shared libraries using | |
2051 | the .gdb_index section. | |
2052 | ||
927fbba6 JB |
2053 | * Ada support for GDB/MI Variable Objects has been added. |
2054 | ||
20388dd6 YQ |
2055 | * GDB can now support 'breakpoint always-inserted mode' in 'record' |
2056 | target. | |
2057 | ||
f3e0e960 SS |
2058 | * MI changes |
2059 | ||
2060 | ** New command -info-os is the MI equivalent of "info os". | |
2061 | ||
37ce89eb SS |
2062 | ** Output logs ("set logging" and related) now include MI output. |
2063 | ||
edcc5120 TT |
2064 | * New commands |
2065 | ||
e615022a DE |
2066 | ** "set use-deprecated-index-sections on|off" |
2067 | "show use-deprecated-index-sections on|off" | |
2068 | Controls the use of deprecated .gdb_index sections. | |
2069 | ||
edcc5120 TT |
2070 | ** "catch load" and "catch unload" can be used to stop when a shared |
2071 | library is loaded or unloaded, respectively. | |
2072 | ||
816338b5 SS |
2073 | ** "enable count" can be used to auto-disable a breakpoint after |
2074 | several hits. | |
2075 | ||
57651221 | 2076 | ** "info vtbl" can be used to show the virtual method tables for |
c4aeac85 TT |
2077 | C++ and Java objects. |
2078 | ||
06fc020f | 2079 | ** "explore" and its sub commands "explore value" and "explore type" |
6ea71545 | 2080 | can be used to recursively explore values and types of |
06fc020f SCR |
2081 | expressions. These commands are available only if GDB is |
2082 | configured with '--with-python'. | |
2083 | ||
bf88dd68 JK |
2084 | ** "info auto-load" shows status of all kinds of auto-loaded files, |
2085 | "info auto-load gdb-scripts" shows status of auto-loading GDB canned | |
2086 | sequences of commands files, "info auto-load python-scripts" | |
2087 | shows status of auto-loading Python script files, | |
2088 | "info auto-load local-gdbinit" shows status of loading init file | |
2089 | (.gdbinit) from current directory and "info auto-load libthread-db" shows | |
2090 | status of inferior specific thread debugging shared library loading. | |
2091 | ||
2092 | ** "info auto-load-scripts", "set auto-load-scripts on|off" | |
2093 | and "show auto-load-scripts" commands have been deprecated, use their | |
2094 | "info auto-load python-scripts", "set auto-load python-scripts on|off" | |
2095 | and "show auto-load python-scripts" counterparts instead. | |
2096 | ||
e7e0cddf SS |
2097 | ** "dprintf location,format,args..." creates a dynamic printf, which |
2098 | is basically a breakpoint that does a printf and immediately | |
2099 | resumes your program's execution, so it is like a printf that you | |
2100 | can insert dynamically at runtime instead of at compiletime. | |
2101 | ||
9cb709b6 TT |
2102 | ** "set print symbol" |
2103 | "show print symbol" | |
2104 | Controls whether GDB attempts to display the symbol, if any, | |
2105 | corresponding to addresses it prints. This defaults to "on", but | |
2106 | you can set it to "off" to restore GDB's previous behavior. | |
2107 | ||
2d4c29c5 TS |
2108 | * Deprecated commands |
2109 | ||
2110 | ** For the Renesas Super-H architecture, the "regs" command has been | |
2111 | deprecated, and "info all-registers" should be used instead. | |
2112 | ||
a58b110a KB |
2113 | * New targets |
2114 | ||
2115 | Renesas RL78 rl78-*-elf | |
60c9a3c0 | 2116 | HP OpenVMS ia64 ia64-hp-openvms* |
a58b110a | 2117 | |
72895ff6 LM |
2118 | * GDBserver supports evaluation of breakpoint conditions. When |
2119 | support is advertised by GDBserver, GDB may be told to send the | |
2120 | breakpoint conditions in bytecode form to GDBserver. GDBserver | |
2121 | will only report the breakpoint trigger to GDB when its condition | |
2122 | evaluates to true. | |
2123 | ||
2124 | * New options | |
2125 | ||
4cc0665f MR |
2126 | set mips compression |
2127 | show mips compression | |
2128 | Select the compressed ISA encoding used in functions that have no symbol | |
2129 | information available. The encoding can be set to either of: | |
2130 | mips16 | |
2131 | micromips | |
2132 | and is updated automatically from ELF file flags if available. | |
2133 | ||
72895ff6 LM |
2134 | set breakpoint condition-evaluation |
2135 | show breakpoint condition-evaluation | |
cf65ecd3 | 2136 | Control whether breakpoint conditions are evaluated by GDB ("host") or by |
5b43fab2 JK |
2137 | GDBserver ("target"). Default option "auto" chooses the most efficient |
2138 | available mode. | |
72895ff6 LM |
2139 | This option can improve debugger efficiency depending on the speed of the |
2140 | target. | |
2141 | ||
bf88dd68 JK |
2142 | set auto-load off |
2143 | Disable auto-loading globally. | |
2144 | ||
2145 | show auto-load | |
2146 | Show auto-loading setting of all kinds of auto-loaded files. | |
2147 | ||
2148 | set auto-load gdb-scripts on|off | |
2149 | show auto-load gdb-scripts | |
2150 | Control auto-loading of GDB canned sequences of commands files. | |
2151 | ||
2152 | set auto-load python-scripts on|off | |
2153 | show auto-load python-scripts | |
2154 | Control auto-loading of Python script files. | |
2155 | ||
2156 | set auto-load local-gdbinit on|off | |
2157 | show auto-load local-gdbinit | |
2158 | Control loading of init file (.gdbinit) from current directory. | |
2159 | ||
2160 | set auto-load libthread-db on|off | |
2161 | show auto-load libthread-db | |
2162 | Control auto-loading of inferior specific thread debugging shared library. | |
2163 | ||
7349ff92 | 2164 | set auto-load scripts-directory <dir1>[:<dir2>...] |
9cc815f5 | 2165 | show auto-load scripts-directory |
7349ff92 JK |
2166 | Set a list of directories from which to load auto-loaded scripts. |
2167 | Automatically loaded Python scripts and GDB scripts are located in one | |
2168 | of the directories listed by this option. | |
2169 | The delimiter (':' above) may differ according to the host platform. | |
2170 | ||
bccbefd2 JK |
2171 | set auto-load safe-path <dir1>[:<dir2>...] |
2172 | show auto-load safe-path | |
2173 | Set a list of directories from which it is safe to auto-load files. | |
2174 | The delimiter (':' above) may differ according to the host platform. | |
2175 | ||
4dc84fd1 JK |
2176 | set debug auto-load on|off |
2177 | show debug auto-load | |
2178 | Control display of debugging info for auto-loading the files above. | |
2179 | ||
d3ce09f5 | 2180 | set dprintf-style gdb|call|agent |
e7e0cddf | 2181 | show dprintf-style |
d3ce09f5 SS |
2182 | Control the way in which a dynamic printf is performed; "gdb" |
2183 | requests a GDB printf command, while "call" causes dprintf to call a | |
2184 | function in the inferior. "agent" requests that the target agent | |
2185 | (such as GDBserver) do the printing. | |
e7e0cddf SS |
2186 | |
2187 | set dprintf-function <expr> | |
2188 | show dprintf-function | |
2189 | set dprintf-channel <expr> | |
2190 | show dprintf-channel | |
2191 | Set the function and optional first argument to the call when using | |
2192 | the "call" style of dynamic printf. | |
2193 | ||
d3ce09f5 SS |
2194 | set disconnected-dprintf on|off |
2195 | show disconnected-dprintf | |
2196 | Control whether agent-style dynamic printfs continue to be in effect | |
2197 | after GDB disconnects. | |
2198 | ||
6dea1fbd JK |
2199 | * New configure options |
2200 | ||
7349ff92 JK |
2201 | --with-auto-load-dir |
2202 | Configure default value for the 'set auto-load scripts-directory' | |
1564a261 JK |
2203 | setting above. It defaults to '$debugdir:$datadir/auto-load', |
2204 | $debugdir representing global debugging info directories (available | |
2205 | via 'show debug-file-directory') and $datadir representing GDB's data | |
2206 | directory (available via 'show data-directory'). | |
7349ff92 | 2207 | |
6dea1fbd JK |
2208 | --with-auto-load-safe-path |
2209 | Configure default value for the 'set auto-load safe-path' setting | |
7349ff92 | 2210 | above. It defaults to the --with-auto-load-dir setting. |
6dea1fbd JK |
2211 | |
2212 | --without-auto-load-safe-path | |
2213 | Set 'set auto-load safe-path' to '/', effectively disabling this | |
2214 | security feature. | |
2215 | ||
72895ff6 LM |
2216 | * New remote packets |
2217 | ||
74c48cbb PA |
2218 | z0/z1 conditional breakpoints extension |
2219 | ||
72895ff6 LM |
2220 | The z0/z1 breakpoint insertion packets have been extended to carry |
2221 | a list of conditional expressions over to the remote stub depending on the | |
2222 | condition evaluation mode. The use of this extension can be controlled | |
2223 | via the "set remote conditional-breakpoints-packet" command. | |
2224 | ||
9b224c5e PA |
2225 | QProgramSignals: |
2226 | ||
2227 | Specify the signals which the remote stub may pass to the debugged | |
2228 | program without GDB involvement. | |
2229 | ||
8320cc4f JK |
2230 | * New command line options |
2231 | ||
2232 | --init-command=FILE, -ix Like --command, -x but execute it | |
2233 | before loading inferior. | |
2234 | --init-eval-command=COMMAND, -iex Like --eval-command=COMMAND, -ex but | |
2235 | execute it before loading inferior. | |
2236 | ||
8837a20f JB |
2237 | *** Changes in GDB 7.4 |
2238 | ||
f8eba3c6 TT |
2239 | * GDB now handles ambiguous linespecs more consistently; the existing |
2240 | FILE:LINE support has been expanded to other types of linespecs. A | |
2241 | breakpoint will now be set on all matching locations in all | |
2242 | inferiors, and locations will be added or removed according to | |
2243 | inferior changes. | |
2244 | ||
1bfeeb0f JL |
2245 | * GDB now allows you to skip uninteresting functions and files when |
2246 | stepping with the "skip function" and "skip file" commands. | |
2247 | ||
480a3f21 PW |
2248 | * GDB has two new commands: "set remote hardware-watchpoint-length-limit" |
2249 | and "show remote hardware-watchpoint-length-limit". These allows to | |
2250 | set or show the maximum length limit (in bytes) of a remote | |
2251 | target hardware watchpoint. | |
2252 | ||
2253 | This allows e.g. to use "unlimited" hardware watchpoints with the | |
2254 | gdbserver integrated in Valgrind version >= 3.7.0. Such Valgrind | |
2255 | watchpoints are slower than real hardware watchpoints but are | |
2256 | significantly faster than gdb software watchpoints. | |
2257 | ||
3a7bf607 PM |
2258 | * Python scripting |
2259 | ||
32d1c362 | 2260 | ** The register_pretty_printer function in module gdb.printing now takes |
7d0aff21 | 2261 | an optional `replace' argument. If True, the new printer replaces any |
32d1c362 DE |
2262 | existing one. |
2263 | ||
3a7bf607 | 2264 | ** The "maint set python print-stack on|off" command has been |
4795f398 DE |
2265 | deprecated and will be deleted in GDB 7.5. |
2266 | A new command: "set python print-stack none|full|message" has | |
2267 | replaced it. Additionally, the default for "print-stack" is | |
2268 | now "message", which just prints the error message without | |
2269 | the stack trace. | |
3a7bf607 | 2270 | |
baacfb07 | 2271 | ** A prompt substitution hook (prompt_hook) is now available to the |
3a7bf607 | 2272 | Python API. |
713389e0 | 2273 | |
fa3a4f15 PM |
2274 | ** A new Python module, gdb.prompt has been added to the GDB Python |
2275 | modules library. This module provides functionality for | |
baacfb07 | 2276 | escape sequences in prompts (used by set/show |
fa3a4f15 PM |
2277 | extended-prompt). These escape sequences are replaced by their |
2278 | corresponding value. | |
2279 | ||
5e239b84 PM |
2280 | ** Python commands and convenience-functions located in |
2281 | 'data-directory'/python/gdb/command and | |
2282 | 'data-directory'/python/gdb/function are now automatically loaded | |
2283 | on GDB start-up. | |
2284 | ||
9df2fbc4 PM |
2285 | ** Blocks now provide four new attributes. global_block and |
2286 | static_block will return the global and static blocks | |
2287 | respectively. is_static and is_global are boolean attributes | |
2288 | that indicate if the block is one of those two types. | |
2289 | ||
457e09f0 DE |
2290 | ** Symbols now provide the "type" attribute, the type of the symbol. |
2291 | ||
6839b47f KP |
2292 | ** The "gdb.breakpoint" function has been deprecated in favor of |
2293 | "gdb.breakpoints". | |
2294 | ||
cc72b2a2 KP |
2295 | ** A new class "gdb.FinishBreakpoint" is provided to catch the return |
2296 | of a function. This class is based on the "finish" command | |
2297 | available in the CLI. | |
2298 | ||
84ad80e6 PK |
2299 | ** Type objects for struct and union types now allow access to |
2300 | the fields using standard Python dictionary (mapping) methods. | |
2301 | For example, "some_type['myfield']" now works, as does | |
2302 | "some_type.items()". | |
2303 | ||
20c168b5 KP |
2304 | ** A new event "gdb.new_objfile" has been added, triggered by loading a |
2305 | new object file. | |
2306 | ||
03c3051a PK |
2307 | ** A new function, "deep_items" has been added to the gdb.types |
2308 | module in the GDB Python modules library. This function returns | |
2309 | an iterator over the fields of a struct or union type. Unlike | |
2310 | the standard Python "iteritems" method, it will recursively traverse | |
2311 | any anonymous fields. | |
2312 | ||
7376e450 TT |
2313 | * MI changes |
2314 | ||
2315 | ** "*stopped" events can report several new "reason"s, such as | |
2316 | "solib-event". | |
2317 | ||
2318 | ** Breakpoint changes are now notified using new async records, like | |
2319 | "=breakpoint-modified". | |
2320 | ||
2321 | ** New command -ada-task-info. | |
2322 | ||
98a5dd13 DE |
2323 | * libthread-db-search-path now supports two special values: $sdir and $pdir. |
2324 | $sdir specifies the default system locations of shared libraries. | |
2325 | $pdir specifies the directory where the libpthread used by the application | |
2326 | lives. | |
2327 | ||
2328 | GDB no longer looks in $sdir and $pdir after it has searched the directories | |
2329 | mentioned in libthread-db-search-path. If you want to search those | |
2330 | directories, they must be specified in libthread-db-search-path. | |
2331 | The default value of libthread-db-search-path on GNU/Linux and Solaris | |
2332 | systems is now "$sdir:$pdir". | |
2333 | ||
2334 | $pdir is not supported by gdbserver, it is currently ignored. | |
2335 | $sdir is supported by gdbserver. | |
2336 | ||
478aac75 DE |
2337 | * New configure option --with-iconv-bin. |
2338 | When using the internationalization support like the one in the GNU C | |
2339 | library, GDB will invoke the "iconv" program to get a list of supported | |
2340 | character sets. If this program lives in a non-standard location, one can | |
2341 | use this option to specify where to find it. | |
2342 | ||
9c06b0b4 TJB |
2343 | * When natively debugging programs on PowerPC BookE processors running |
2344 | a Linux kernel version 2.6.34 or later, GDB supports masked hardware | |
2345 | watchpoints, which specify a mask in addition to an address to watch. | |
2346 | The mask specifies that some bits of an address (the bits which are | |
2347 | reset in the mask) should be ignored when matching the address accessed | |
2348 | by the inferior against the watchpoint address. See the "PowerPC Embedded" | |
2349 | section in the user manual for more details. | |
2350 | ||
03f2bd59 JK |
2351 | * The new option --once causes GDBserver to stop listening for connections once |
2352 | the first connection is made. The listening port used by GDBserver will | |
2353 | become available after that. | |
2354 | ||
71eba9c2 | 2355 | * New commands "info macros" and "alias" have been added. |
edc84990 | 2356 | |
2bda9cc5 JK |
2357 | * New function parameters suffix @entry specifies value of function parameter |
2358 | at the time the function got called. Entry values are available only since | |
2359 | gcc version 4.7. | |
2360 | ||
ed59ded5 DE |
2361 | * New commands |
2362 | ||
2363 | !SHELL COMMAND | |
2364 | "!" is now an alias of the "shell" command. | |
2365 | Note that no space is needed between "!" and SHELL COMMAND. | |
2366 | ||
9c06b0b4 TJB |
2367 | * Changed commands |
2368 | ||
2369 | watch EXPRESSION mask MASK_VALUE | |
2370 | The watch command now supports the mask argument which allows creation | |
2371 | of masked watchpoints, if the current architecture supports this feature. | |
2372 | ||
dbaefcf7 DE |
2373 | info auto-load-scripts [REGEXP] |
2374 | This command was formerly named "maintenance print section-scripts". | |
2375 | It is now generally useful and is no longer a maintenance-only command. | |
2376 | ||
71eba9c2 | 2377 | info macro [-all] [--] MACRO |
2378 | The info macro command has new options `-all' and `--'. The first for | |
2379 | printing all definitions of a macro. The second for explicitly specifying | |
2380 | the end of arguments and the beginning of the macro name in case the macro | |
2381 | name starts with a hyphen. | |
2382 | ||
3065dfb6 SS |
2383 | collect[/s] EXPRESSIONS |
2384 | The tracepoint collect command now takes an optional modifier "/s" | |
2385 | that directs it to dereference pointer-to-character types and | |
2386 | collect the bytes of memory up to a zero byte. The behavior is | |
2387 | similar to what you see when you use the regular print command on a | |
2388 | string. An optional integer following the "/s" sets a bound on the | |
2389 | number of bytes that will be collected. | |
2390 | ||
f196051f SS |
2391 | tstart [NOTES] |
2392 | The trace start command now interprets any supplied arguments as a | |
2393 | note to be recorded with the trace run, with an effect similar to | |
2394 | setting the variable trace-notes. | |
2395 | ||
2396 | tstop [NOTES] | |
2397 | The trace stop command now interprets any arguments as a note to be | |
2398 | mentioned along with the tstatus report that the trace was stopped | |
2399 | with a command. The effect is similar to setting the variable | |
2400 | trace-stop-notes. | |
2401 | ||
d248b706 KY |
2402 | * Tracepoints can now be enabled and disabled at any time after a trace |
2403 | experiment has been started using the standard "enable" and "disable" | |
2404 | commands. It is now possible to start a trace experiment with no enabled | |
2405 | tracepoints; GDB will display a warning, but will allow the experiment to | |
2406 | begin, assuming that tracepoints will be enabled as needed while the trace | |
2407 | is running. | |
2408 | ||
405f8e94 SS |
2409 | * Fast tracepoints on 32-bit x86-architectures can now be placed at |
2410 | locations with 4-byte instructions, when they were previously | |
2411 | limited to locations with instructions of 5 bytes or longer. | |
2412 | ||
2bda9cc5 JK |
2413 | * New options |
2414 | ||
45cfd468 DE |
2415 | set debug dwarf2-read |
2416 | show debug dwarf2-read | |
2417 | Turns on or off display of debugging messages related to reading | |
2418 | DWARF debug info. The default is off. | |
2419 | ||
2420 | set debug symtab-create | |
2421 | show debug symtab-create | |
2422 | Turns on or off display of debugging messages related to symbol table | |
2423 | creation. The default is off. | |
2424 | ||
baacfb07 PM |
2425 | set extended-prompt |
2426 | show extended-prompt | |
2427 | Set the GDB prompt, and allow escape sequences to be inserted to | |
2428 | display miscellaneous information (see 'help set extended-prompt' | |
2429 | for the list of sequences). This prompt (and any information | |
2430 | accessed through the escape sequences) is updated every time the | |
2431 | prompt is displayed. | |
2432 | ||
2bda9cc5 JK |
2433 | set print entry-values (both|compact|default|if-needed|no|only|preferred) |
2434 | show print entry-values | |
2435 | Set printing of frame argument values at function entry. In some cases | |
2436 | GDB can determine the value of function argument which was passed by the | |
2437 | function caller, even if the value was modified inside the called function. | |
2438 | ||
2439 | set debug entry-values | |
2440 | show debug entry-values | |
2441 | Control display of debugging info for determining frame argument values at | |
2442 | function entry and virtual tail call frames. | |
2443 | ||
c011a4f4 DE |
2444 | set basenames-may-differ |
2445 | show basenames-may-differ | |
2446 | Set whether a source file may have multiple base names. | |
2447 | (A "base name" is the name of a file with the directory part removed. | |
2448 | Example: The base name of "/home/user/hello.c" is "hello.c".) | |
2449 | If set, GDB will canonicalize file names (e.g., expand symlinks) | |
2450 | before comparing them. Canonicalization is an expensive operation, | |
2451 | but it allows the same file be known by more than one base name. | |
2452 | If not set (the default), all source files are assumed to have just | |
2453 | one base name, and gdb will do file name comparisons more efficiently. | |
2454 | ||
f196051f SS |
2455 | set trace-user |
2456 | show trace-user | |
2457 | set trace-notes | |
2458 | show trace-notes | |
2459 | Set a user name and notes for the current and any future trace runs. | |
2460 | This is useful for long-running and/or disconnected traces, to | |
2461 | inform others (or yourself) as to who is running the trace, supply | |
2462 | contact information, or otherwise explain what is going on. | |
2463 | ||
2464 | set trace-stop-notes | |
2465 | show trace-stop-notes | |
2466 | Set a note attached to the trace run, that is displayed when the | |
2467 | trace has been stopped by a tstop command. This is useful for | |
2468 | instance as an explanation, if you are stopping a trace run that was | |
2469 | started by someone else. | |
2470 | ||
d248b706 KY |
2471 | * New remote packets |
2472 | ||
2473 | QTEnable | |
2474 | ||
2475 | Dynamically enable a tracepoint in a started trace experiment. | |
2476 | ||
2477 | QTDisable | |
2478 | ||
2479 | Dynamically disable a tracepoint in a started trace experiment. | |
2480 | ||
f196051f SS |
2481 | QTNotes |
2482 | ||
2483 | Set the user and notes of the trace run. | |
2484 | ||
2485 | qTP | |
2486 | ||
2487 | Query the current status of a tracepoint. | |
2488 | ||
405f8e94 SS |
2489 | qTMinFTPILen |
2490 | ||
2491 | Query the minimum length of instruction at which a fast tracepoint may | |
2492 | be placed. | |
2493 | ||
1a532630 PP |
2494 | * Dcache size (number of lines) and line-size are now runtime-configurable |
2495 | via "set dcache line" and "set dcache line-size" commands. | |
2496 | ||
11315641 YQ |
2497 | * New targets |
2498 | ||
2499 | Texas Instruments TMS320C6x tic6x-*-* | |
2500 | ||
87326c78 DD |
2501 | * New Simulators |
2502 | ||
2503 | Renesas RL78 rl78-*-elf | |
2504 | ||
e8d56f18 JB |
2505 | *** Changes in GDB 7.3.1 |
2506 | ||
2507 | * The build failure for NetBSD and OpenBSD targets have now been fixed. | |
2508 | ||
d6e00af6 | 2509 | *** Changes in GDB 7.3 |
797054e6 | 2510 | |
60f98dde MS |
2511 | * GDB has a new command: "thread find [REGEXP]". |
2512 | It finds the thread id whose name, target id, or thread extra info | |
2513 | matches the given regular expression. | |
2514 | ||
eee5b35e DD |
2515 | * The "catch syscall" command now works on mips*-linux* targets. |
2516 | ||
b716877b AB |
2517 | * The -data-disassemble MI command now supports modes 2 and 3 for |
2518 | dumping the instruction opcodes. | |
2519 | ||
aae1c79a DE |
2520 | * New command line options |
2521 | ||
2522 | -data-directory DIR Specify DIR as the "data-directory". | |
2523 | This is mostly for testing purposes. | |
2524 | ||
a86caf66 DE |
2525 | * The "maint set python auto-load on|off" command has been renamed to |
2526 | "set auto-load-scripts on|off". | |
2527 | ||
99e7ae30 DE |
2528 | * GDB has a new command: "set directories". |
2529 | It is like the "dir" command except that it replaces the | |
2530 | source path list instead of augmenting it. | |
2531 | ||
4694da01 TT |
2532 | * GDB now understands thread names. |
2533 | ||
2534 | On GNU/Linux, "info threads" will display the thread name as set by | |
2535 | prctl or pthread_setname_np. | |
2536 | ||
2537 | There is also a new command, "thread name", which can be used to | |
2538 | assign a name internally for GDB to display. | |
2539 | ||
f4b8a18d KW |
2540 | * OpenCL C |
2541 | Initial support for the OpenCL C language (http://www.khronos.org/opencl) | |
2542 | has been integrated into GDB. | |
2543 | ||
585d1eb8 PM |
2544 | * Python scripting |
2545 | ||
da5d4055 PM |
2546 | ** The function gdb.Write now accepts an optional keyword 'stream'. |
2547 | This keyword, when provided, will direct the output to either | |
2548 | stdout, stderr, or GDB's logging output. | |
2549 | ||
9a6f1302 PM |
2550 | ** Parameters can now be be sub-classed in Python, and in particular |
2551 | you may implement the get_set_doc and get_show_doc functions. | |
2552 | This improves how Parameter set/show documentation is processed | |
2553 | and allows for more dynamic content. | |
2554 | ||
29703da4 PM |
2555 | ** Symbols, Symbol Table, Symbol Table and Line, Object Files, |
2556 | Inferior, Inferior Thread, Blocks, and Block Iterator APIs now | |
2557 | have an is_valid method. | |
2558 | ||
350c6c65 PM |
2559 | ** Breakpoints can now be sub-classed in Python, and in particular |
2560 | you may implement a 'stop' function that is executed each time | |
2561 | the inferior reaches that breakpoint. | |
2562 | ||
6e6fbe60 DE |
2563 | ** New function gdb.lookup_global_symbol looks up a global symbol. |
2564 | ||
585d1eb8 PM |
2565 | ** GDB values in Python are now callable if the value represents a |
2566 | function. For example, if 'some_value' represents a function that | |
2567 | takes two integer parameters and returns a value, you can call | |
2568 | that function like so: | |
2569 | ||
2570 | result = some_value (10,20) | |
2571 | ||
0e3509db DE |
2572 | ** Module gdb.types has been added. |
2573 | It contains a collection of utilities for working with gdb.Types objects: | |
2574 | get_basic_type, has_field, make_enum_dict. | |
2575 | ||
7b51bc51 DE |
2576 | ** Module gdb.printing has been added. |
2577 | It contains utilities for writing and registering pretty-printers. | |
2578 | New classes: PrettyPrinter, SubPrettyPrinter, | |
2579 | RegexpCollectionPrettyPrinter. | |
2580 | New function: register_pretty_printer. | |
2581 | ||
2582 | ** New commands "info pretty-printers", "enable pretty-printer" and | |
2583 | "disable pretty-printer" have been added. | |
2584 | ||
99e7ae30 DE |
2585 | ** gdb.parameter("directories") is now available. |
2586 | ||
d8e22779 TT |
2587 | ** New function gdb.newest_frame returns the newest frame in the |
2588 | selected thread. | |
2589 | ||
4694da01 TT |
2590 | ** The gdb.InferiorThread class has a new "name" attribute. This |
2591 | holds the thread's name. | |
2592 | ||
505500db SW |
2593 | ** Python Support for Inferior events. |
2594 | Python scripts can add observers to be notified of events | |
824446ad | 2595 | occurring in the process being debugged. |
c17a9e46 HZ |
2596 | The following events are currently supported: |
2597 | - gdb.events.cont Continue event. | |
2598 | - gdb.events.exited Inferior exited event. | |
2599 | - gdb.events.stop Signal received, and Breakpoint hit events. | |
2600 | ||
def98928 TT |
2601 | * C++ Improvements: |
2602 | ||
2603 | ** GDB now puts template parameters in scope when debugging in an | |
2604 | instantiation. For example, if you have: | |
2605 | ||
2606 | template<int X> int func (void) { return X; } | |
2607 | ||
2608 | then if you step into func<5>, "print X" will show "5". This | |
2609 | feature requires proper debuginfo support from the compiler; it | |
2610 | was added to GCC 4.5. | |
2611 | ||
66cb8159 TT |
2612 | ** The motion commands "next", "finish", "until", and "advance" now |
2613 | work better when exceptions are thrown. In particular, GDB will | |
2614 | no longer lose control of the inferior; instead, the GDB will | |
2615 | stop the inferior at the point at which the exception is caught. | |
2616 | This functionality requires a change in the exception handling | |
2617 | code that was introduced in GCC 4.5. | |
2618 | ||
4aac0db7 UW |
2619 | * GDB now follows GCC's rules on accessing volatile objects when |
2620 | reading or writing target state during expression evaluation. | |
2621 | One notable difference to prior behavior is that "print x = 0" | |
2622 | no longer generates a read of x; the value of the assignment is | |
2623 | now always taken directly from the value being assigned. | |
2624 | ||
283e6a52 TT |
2625 | * GDB now has some support for using labels in the program's source in |
2626 | linespecs. For instance, you can use "advance label" to continue | |
2627 | execution to a label. | |
2628 | ||
2629 | * GDB now has support for reading and writing a new .gdb_index | |
2630 | section. This section holds a fast index of DWARF debugging | |
2631 | information and can be used to greatly speed up GDB startup and | |
2632 | operation. See the documentation for `save gdb-index' for details. | |
2633 | ||
b56df873 | 2634 | * The "watch" command now accepts an optional "-location" argument. |
14c0d4e1 | 2635 | When used, this causes GDB to watch the memory referred to by the |
b56df873 TT |
2636 | expression. Such a watchpoint is never deleted due to it going out |
2637 | of scope. | |
2638 | ||
ae53ffa4 PA |
2639 | * GDB now supports thread debugging of core dumps on GNU/Linux. |
2640 | ||
2641 | GDB now activates thread debugging using the libthread_db library | |
2642 | when debugging GNU/Linux core dumps, similarly to when debugging | |
2643 | live processes. As a result, when debugging a core dump file, GDB | |
2644 | is now able to display pthread_t ids of threads. For example, "info | |
2645 | threads" shows the same output as when debugging the process when it | |
2646 | was live. In earlier releases, you'd see something like this: | |
2647 | ||
2648 | (gdb) info threads | |
2649 | * 1 LWP 6780 main () at main.c:10 | |
2650 | ||
2651 | While now you see this: | |
2652 | ||
2653 | (gdb) info threads | |
2654 | * 1 Thread 0x7f0f5712a700 (LWP 6780) main () at main.c:10 | |
2655 | ||
2656 | It is also now possible to inspect TLS variables when debugging core | |
2657 | dumps. | |
2658 | ||
2659 | When debugging a core dump generated on a machine other than the one | |
2660 | used to run GDB, you may need to point GDB at the correct | |
2661 | libthread_db library with the "set libthread-db-search-path" | |
2662 | command. See the user manual for more details on this command. | |
2663 | ||
f1310107 TJB |
2664 | * When natively debugging programs on PowerPC BookE processors running |
2665 | a Linux kernel version 2.6.34 or later, GDB supports ranged breakpoints, | |
2666 | which stop execution of the inferior whenever it executes an instruction | |
2667 | at any address within the specified range. See the "PowerPC Embedded" | |
2668 | section in the user manual for more details. | |
2669 | ||
248c9dbc JB |
2670 | * New features in the GDB remote stub, GDBserver |
2671 | ||
1aee7009 JB |
2672 | ** GDBserver is now supported on PowerPC LynxOS (versions 4.x and 5.x), |
2673 | and i686 LynxOS (version 5.x). | |
248c9dbc | 2674 | |
eb826dc6 MF |
2675 | ** GDBserver is now supported on Blackfin Linux. |
2676 | ||
44603653 JB |
2677 | * New native configurations |
2678 | ||
2679 | ia64 HP-UX ia64-*-hpux* | |
2680 | ||
91021223 MF |
2681 | * New targets: |
2682 | ||
2683 | Analog Devices, Inc. Blackfin Processor bfin-* | |
2684 | ||
6e1bb179 JB |
2685 | * Ada task switching is now supported on sparc-elf targets when |
2686 | debugging a program using the Ravenscar Profile. For more information, | |
2687 | see the "Tasking Support when using the Ravenscar Profile" section | |
2688 | in the GDB user manual. | |
2689 | ||
50c97f38 TT |
2690 | * Guile support was removed. |
2691 | ||
448a92bf MF |
2692 | * New features in the GNU simulator |
2693 | ||
2694 | ** The --map-info flag lists all known core mappings. | |
2695 | ||
66ee2731 MF |
2696 | ** CFI flashes may be simulated via the "cfi" device. |
2697 | ||
76b8507d | 2698 | *** Changes in GDB 7.2 |
bfbf3774 | 2699 | |
ba25b921 PA |
2700 | * Shared library support for remote targets by default |
2701 | ||
2702 | When GDB is configured for a generic, non-OS specific target, like | |
2703 | for example, --target=arm-eabi or one of the many *-*-elf targets, | |
2704 | GDB now queries remote stubs for loaded shared libraries using the | |
2705 | `qXfer:libraries:read' packet. Previously, shared library support | |
2706 | was always disabled for such configurations. | |
2707 | ||
4656f5c6 SW |
2708 | * C++ Improvements: |
2709 | ||
2710 | ** Argument Dependent Lookup (ADL) | |
2711 | ||
2712 | In C++ ADL lookup directs function search to the namespaces of its | |
2713 | arguments even if the namespace has not been imported. | |
2714 | For example: | |
2715 | namespace A | |
2716 | { | |
2717 | class B { }; | |
2718 | void foo (B) { } | |
2719 | } | |
2720 | ... | |
2721 | A::B b | |
2722 | foo(b) | |
2723 | Here the compiler will search for `foo' in the namespace of 'b' | |
2724 | and find A::foo. GDB now supports this. This construct is commonly | |
2725 | used in the Standard Template Library for operators. | |
2726 | ||
2727 | ** Improved User Defined Operator Support | |
2728 | ||
2729 | In addition to member operators, GDB now supports lookup of operators | |
2730 | defined in a namespace and imported with a `using' directive, operators | |
2731 | defined in the global scope, operators imported implicitly from an | |
2732 | anonymous namespace, and the ADL operators mentioned in the previous | |
2733 | entry. | |
2734 | GDB now also supports proper overload resolution for all the previously | |
2735 | mentioned flavors of operators. | |
2736 | ||
254e6b9e DE |
2737 | ** static const class members |
2738 | ||
2739 | Printing of static const class members that are initialized in the | |
2740 | class definition has been fixed. | |
2741 | ||
711e434b PM |
2742 | * Windows Thread Information Block access. |
2743 | ||
2744 | On Windows targets, GDB now supports displaying the Windows Thread | |
2745 | Information Block (TIB) structure. This structure is visible either | |
2746 | by using the new command `info w32 thread-information-block' or, by | |
2747 | dereferencing the new convenience variable named `$_tlb', a | |
2748 | thread-specific pointer to the TIB. This feature is also supported | |
2749 | when remote debugging using GDBserver. | |
2750 | ||
0fb4aa4b PA |
2751 | * Static tracepoints |
2752 | ||
2753 | Static tracepoints are calls in the user program into a tracing | |
2754 | library. One such library is a port of the LTTng kernel tracer to | |
2755 | userspace --- UST (LTTng Userspace Tracer, http://lttng.org/ust). | |
2756 | When debugging with GDBserver, GDB now supports combining the GDB | |
2757 | tracepoint machinery with such libraries. For example: the user can | |
2758 | use GDB to probe a static tracepoint marker (a call from the user | |
2759 | program into the tracing library) with the new "strace" command (see | |
2760 | "New commands" below). This creates a "static tracepoint" in the | |
2761 | breakpoint list, that can be manipulated with the same feature set | |
2762 | as fast and regular tracepoints. E.g., collect registers, local and | |
2763 | global variables, collect trace state variables, and define | |
2764 | tracepoint conditions. In addition, the user can collect extra | |
2765 | static tracepoint marker specific data, by collecting the new | |
2766 | $_sdata internal variable. When analyzing the trace buffer, you can | |
2767 | inspect $_sdata like any other variable available to GDB. For more | |
2768 | information, see the "Tracepoints" chapter in GDB user manual. New | |
2769 | remote packets have been defined to support static tracepoints, see | |
2770 | the "New remote packets" section below. | |
2771 | ||
ca11e899 SS |
2772 | * Better reconstruction of tracepoints after disconnected tracing |
2773 | ||
2774 | GDB will attempt to download the original source form of tracepoint | |
2775 | definitions when starting a trace run, and then will upload these | |
2776 | upon reconnection to the target, resulting in a more accurate | |
2777 | reconstruction of the tracepoints that are in use on the target. | |
2778 | ||
2779 | * Observer mode | |
2780 | ||
2781 | You can now exercise direct control over the ways that GDB can | |
2782 | affect your program. For instance, you can disallow the setting of | |
2783 | breakpoints, so that the program can run continuously (assuming | |
2784 | non-stop mode). In addition, the "observer" variable is available | |
2785 | to switch all of the different controls; in observer mode, GDB | |
2786 | cannot affect the target's behavior at all, which is useful for | |
2787 | tasks like diagnosing live systems in the field. | |
2788 | ||
2789 | * The new convenience variable $_thread holds the number of the | |
2790 | current thread. | |
2791 | ||
711e434b PM |
2792 | * New remote packets |
2793 | ||
2794 | qGetTIBAddr | |
2795 | ||
2796 | Return the address of the Windows Thread Information Block of a given thread. | |
2797 | ||
dde08ee1 PA |
2798 | qRelocInsn |
2799 | ||
2800 | In response to several of the tracepoint packets, the target may now | |
2801 | also respond with a number of intermediate `qRelocInsn' request | |
2802 | packets before the final result packet, to have GDB handle | |
2803 | relocating an instruction to execute at a different address. This | |
2804 | is particularly useful for stubs that support fast tracepoints. GDB | |
2805 | reports support for this feature in the qSupported packet. | |
2806 | ||
0fb4aa4b PA |
2807 | qTfSTM, qTsSTM |
2808 | ||
2809 | List static tracepoint markers in the target program. | |
2810 | ||
2811 | qTSTMat | |
2812 | ||
2813 | List static tracepoint markers at a given address in the target | |
2814 | program. | |
2815 | ||
2816 | qXfer:statictrace:read | |
2817 | ||
2818 | Read the static trace data collected (by a `collect $_sdata' | |
2819 | tracepoint action). The remote stub reports support for this packet | |
2820 | to gdb's qSupported query. | |
2821 | ||
ca11e899 SS |
2822 | QAllow |
2823 | ||
2824 | Send the current settings of GDB's permission flags. | |
2825 | ||
2826 | QTDPsrc | |
2827 | ||
2828 | Send part of the source (textual) form of a tracepoint definition, | |
2829 | which includes location, conditional, and action list. | |
2830 | ||
3f7b2faa DE |
2831 | * The source command now accepts a -s option to force searching for the |
2832 | script in the source search path even if the script name specifies | |
2833 | a directory. | |
2834 | ||
d337e9f0 PA |
2835 | * New features in the GDB remote stub, GDBserver |
2836 | ||
0fb4aa4b PA |
2837 | - GDBserver now support tracepoints (including fast tracepoints, and |
2838 | static tracepoints). The feature is currently supported by the | |
2839 | i386-linux and amd64-linux builds. See the "Tracepoints support | |
2840 | in gdbserver" section in the manual for more information. | |
2841 | ||
2842 | GDBserver JIT compiles the tracepoint's conditional agent | |
2843 | expression bytecode into native code whenever possible for low | |
2844 | overhead dynamic tracepoints conditionals. For such tracepoints, | |
2845 | an expression that examines program state is evaluated when the | |
2846 | tracepoint is reached, in order to determine whether to capture | |
2847 | trace data. If the condition is simple and false, processing the | |
2848 | tracepoint finishes very quickly and no data is gathered. | |
2849 | ||
2850 | GDBserver interfaces with the UST (LTTng Userspace Tracer) library | |
2851 | for static tracepoints support. | |
d337e9f0 | 2852 | |
c24d0242 PM |
2853 | - GDBserver now supports x86_64 Windows 64-bit debugging. |
2854 | ||
c8d5aac9 L |
2855 | * GDB now sends xmlRegisters= in qSupported packet to indicate that |
2856 | it understands register description. | |
2857 | ||
7c953934 TT |
2858 | * The --batch flag now disables pagination and queries. |
2859 | ||
8685c86f L |
2860 | * X86 general purpose registers |
2861 | ||
2862 | GDB now supports reading/writing byte, word and double-word x86 | |
2863 | general purpose registers directly. This means you can use, say, | |
2864 | $ah or $ax to refer, respectively, to the byte register AH and | |
2865 | 16-bit word register AX that are actually portions of the 32-bit | |
2866 | register EAX or 64-bit register RAX. | |
2867 | ||
95a42b64 | 2868 | * The `commands' command now accepts a range of breakpoints to modify. |
86b17b60 PA |
2869 | A plain `commands' following a command that creates multiple |
2870 | breakpoints affects all the breakpoints set by that command. This | |
2871 | applies to breakpoints set by `rbreak', and also applies when a | |
2872 | single `break' command creates multiple breakpoints (e.g., | |
2873 | breakpoints on overloaded c++ functions). | |
95a42b64 | 2874 | |
8bd10a10 CM |
2875 | * The `rbreak' command now accepts a filename specification as part of |
2876 | its argument, limiting the functions selected by the regex to those | |
2877 | in the specified file. | |
2878 | ||
ab38a727 PA |
2879 | * Support for remote debugging Windows and SymbianOS shared libraries |
2880 | from Unix hosts has been improved. Non Windows GDB builds now can | |
2881 | understand target reported file names that follow MS-DOS based file | |
2882 | system semantics, such as file names that include drive letters and | |
2883 | use the backslash character as directory separator. This makes it | |
2884 | possible to transparently use the "set sysroot" and "set | |
2885 | solib-search-path" on Unix hosts to point as host copies of the | |
2886 | target's shared libraries. See the new command "set | |
2887 | target-file-system-kind" described below, and the "Commands to | |
2888 | specify files" section in the user manual for more information. | |
2889 | ||
6149aea9 PA |
2890 | * New commands |
2891 | ||
f1421989 HZ |
2892 | eval template, expressions... |
2893 | Convert the values of one or more expressions under the control | |
2894 | of the string template to a command line, and call it. | |
2895 | ||
ab38a727 PA |
2896 | set target-file-system-kind unix|dos-based|auto |
2897 | show target-file-system-kind | |
2898 | Set or show the assumed file system kind for target reported file | |
2899 | names. | |
2900 | ||
6149aea9 PA |
2901 | save breakpoints <filename> |
2902 | Save all current breakpoint definitions to a file suitable for use | |
2903 | in a later debugging session. To read the saved breakpoint | |
2904 | definitions, use the `source' command. | |
2905 | ||
2906 | `save tracepoints' is a new alias for `save-tracepoints'. The latter | |
2907 | is now deprecated. | |
2908 | ||
0fb4aa4b PA |
2909 | info static-tracepoint-markers |
2910 | Display information about static tracepoint markers in the target. | |
2911 | ||
2912 | strace FN | FILE:LINE | *ADDR | -m MARKER_ID | |
2913 | Define a static tracepoint by probing a marker at the given | |
2914 | function, line, address, or marker ID. | |
2915 | ||
ca11e899 SS |
2916 | set observer on|off |
2917 | show observer | |
2918 | Enable and disable observer mode. | |
2919 | ||
2920 | set may-write-registers on|off | |
2921 | set may-write-memory on|off | |
2922 | set may-insert-breakpoints on|off | |
2923 | set may-insert-tracepoints on|off | |
2924 | set may-insert-fast-tracepoints on|off | |
2925 | set may-interrupt on|off | |
2926 | Set individual permissions for GDB effects on the target. Note that | |
2927 | some of these settings can have undesirable or surprising | |
2928 | consequences, particularly when changed in the middle of a session. | |
2929 | For instance, disabling the writing of memory can prevent | |
2930 | breakpoints from being inserted, cause single-stepping to fail, or | |
2931 | even crash your program, if you disable after breakpoints have been | |
2932 | inserted. However, GDB should not crash. | |
2933 | ||
2934 | set record memory-query on|off | |
2935 | show record memory-query | |
2936 | Control whether to stop the inferior if memory changes caused | |
2937 | by an instruction cannot be recorded. | |
2938 | ||
53a71c06 CR |
2939 | * Changed commands |
2940 | ||
2941 | disassemble | |
2942 | The disassemble command now supports "start,+length" form of two arguments. | |
2943 | ||
f3e9a817 PM |
2944 | * Python scripting |
2945 | ||
9279c692 JB |
2946 | ** GDB now provides a new directory location, called the python directory, |
2947 | where Python scripts written for GDB can be installed. The location | |
2948 | of that directory is <data-directory>/python, where <data-directory> | |
2949 | is the GDB data directory. For more details, see section `Scripting | |
2950 | GDB using Python' in the manual. | |
2951 | ||
adc36818 | 2952 | ** The GDB Python API now has access to breakpoints, symbols, symbol |
595939de PM |
2953 | tables, program spaces, inferiors, threads and frame's code blocks. |
2954 | Additionally, GDB Parameters can now be created from the API, and | |
2955 | manipulated via set/show in the CLI. | |
f870a310 | 2956 | |
fa33c3cd | 2957 | ** New functions gdb.target_charset, gdb.target_wide_charset, |
07ca107c DE |
2958 | gdb.progspaces, gdb.current_progspace, and gdb.string_to_argv. |
2959 | ||
2960 | ** New exception gdb.GdbError. | |
fa33c3cd DE |
2961 | |
2962 | ** Pretty-printers are now also looked up in the current program space. | |
f3e9a817 | 2963 | |
967cf477 DE |
2964 | ** Pretty-printers can now be individually enabled and disabled. |
2965 | ||
8a1ea21f DE |
2966 | ** GDB now looks for names of Python scripts to auto-load in a |
2967 | special section named `.debug_gdb_scripts', in addition to looking | |
2968 | for a OBJFILE-gdb.py script when OBJFILE is read by the debugger. | |
2969 | ||
a7bdde9e VP |
2970 | * Tracepoint actions were unified with breakpoint commands. In particular, |
2971 | there are no longer differences in "info break" output for breakpoints and | |
2972 | tracepoints and the "commands" command can be used for both tracepoints and | |
2973 | regular breakpoints. | |
2974 | ||
05071a4d PA |
2975 | * New targets |
2976 | ||
2977 | ARM Symbian arm*-*-symbianelf* | |
2978 | ||
6aecb9c2 JB |
2979 | * D language support. |
2980 | GDB now supports debugging programs written in the D programming | |
2981 | language. | |
2982 | ||
431e49aa TJB |
2983 | * GDB now supports the extended ptrace interface for PowerPC which is |
2984 | available since Linux kernel version 2.6.34. This automatically enables | |
2985 | any hardware breakpoints and additional hardware watchpoints available in | |
2986 | the processor. The old ptrace interface exposes just one hardware | |
2987 | watchpoint and no hardware breakpoints. | |
2988 | ||
2989 | * GDB is now able to use the Data Value Compare (DVC) register available on | |
2990 | embedded PowerPC processors to implement in hardware simple watchpoint | |
2991 | conditions of the form: | |
2992 | ||
2993 | watch ADDRESS|VARIABLE if ADDRESS|VARIABLE == CONSTANT EXPRESSION | |
2994 | ||
2995 | This works in native GDB running on Linux kernels with the extended ptrace | |
2996 | interface mentioned above. | |
2997 | ||
bfbf3774 | 2998 | *** Changes in GDB 7.1 |
abc7453d | 2999 | |
4eef138c TT |
3000 | * C++ Improvements |
3001 | ||
3002 | ** Namespace Support | |
71dee663 SW |
3003 | |
3004 | GDB now supports importing of namespaces in C++. This enables the | |
3005 | user to inspect variables from imported namespaces. Support for | |
3006 | namepace aliasing has also been added. So, if a namespace is | |
3007 | aliased in the current scope (e.g. namepace C=A; ) the user can | |
3008 | print variables using the alias (e.g. (gdb) print C::x). | |
3009 | ||
4eef138c TT |
3010 | ** Bug Fixes |
3011 | ||
3012 | All known bugs relating to the printing of virtual base class were | |
3013 | fixed. It is now possible to call overloaded static methods using a | |
3014 | qualified name. | |
3015 | ||
3016 | ** Cast Operators | |
3017 | ||
3018 | The C++ cast operators static_cast<>, dynamic_cast<>, const_cast<>, | |
3019 | and reinterpret_cast<> are now handled by the C++ expression parser. | |
3020 | ||
2d1c1221 ME |
3021 | * New targets |
3022 | ||
3023 | Xilinx MicroBlaze microblaze-*-* | |
34207b9e | 3024 | Renesas RX rx-*-elf |
2d1c1221 ME |
3025 | |
3026 | * New Simulators | |
3027 | ||
3028 | Xilinx MicroBlaze microblaze | |
34207b9e | 3029 | Renesas RX rx |
2d1c1221 | 3030 | |
6c95b8df PA |
3031 | * Multi-program debugging. |
3032 | ||
3033 | GDB now has support for multi-program (a.k.a. multi-executable or | |
3034 | multi-exec) debugging. This allows for debugging multiple inferiors | |
3035 | simultaneously each running a different program under the same GDB | |
3036 | session. See "Debugging Multiple Inferiors and Programs" in the | |
3037 | manual for more information. This implied some user visible changes | |
3038 | in the multi-inferior support. For example, "info inferiors" now | |
3039 | lists inferiors that are not running yet or that have exited | |
3040 | already. See also "New commands" and "New options" below. | |
3041 | ||
d5551862 SS |
3042 | * New tracing features |
3043 | ||
3044 | GDB's tracepoint facility now includes several new features: | |
3045 | ||
3046 | ** Trace state variables | |
f61e138d SS |
3047 | |
3048 | GDB tracepoints now include support for trace state variables, which | |
3049 | are variables managed by the target agent during a tracing | |
3050 | experiment. They are useful for tracepoints that trigger each | |
3051 | other, so for instance one tracepoint can count hits in a variable, | |
3052 | and then a second tracepoint has a condition that is true when the | |
3053 | count reaches a particular value. Trace state variables share the | |
3054 | $-syntax of GDB convenience variables, and can appear in both | |
3055 | tracepoint actions and condition expressions. Use the "tvariable" | |
3056 | command to create, and "info tvariables" to view; see "Trace State | |
3057 | Variables" in the manual for more detail. | |
7a697b8d | 3058 | |
d5551862 | 3059 | ** Fast tracepoints |
7a697b8d SS |
3060 | |
3061 | GDB now includes an option for defining fast tracepoints, which | |
3062 | targets may implement more efficiently, such as by installing a jump | |
3063 | into the target agent rather than a trap instruction. The resulting | |
3064 | speedup can be by two orders of magnitude or more, although the | |
3065 | tradeoff is that some program locations on some target architectures | |
3066 | might not allow fast tracepoint installation, for instance if the | |
3067 | instruction to be replaced is shorter than the jump. To request a | |
3068 | fast tracepoint, use the "ftrace" command, with syntax identical to | |
3069 | the regular trace command. | |
3070 | ||
d5551862 SS |
3071 | ** Disconnected tracing |
3072 | ||
3073 | It is now possible to detach GDB from the target while it is running | |
3074 | a trace experiment, then reconnect later to see how the experiment | |
3075 | is going. In addition, a new variable disconnected-tracing lets you | |
3076 | tell the target agent whether to continue running a trace if the | |
3077 | connection is lost unexpectedly. | |
3078 | ||
00bf0b85 SS |
3079 | ** Trace files |
3080 | ||
3081 | GDB now has the ability to save the trace buffer into a file, and | |
3082 | then use that file as a target, similarly to you can do with | |
3083 | corefiles. You can select trace frames, print data that was | |
3084 | collected in them, and use tstatus to display the state of the | |
3085 | tracing run at the moment that it was saved. To create a trace | |
3086 | file, use "tsave <filename>", and to use it, do "target tfile | |
3087 | <name>". | |
4daf5ac0 SS |
3088 | |
3089 | ** Circular trace buffer | |
3090 | ||
3091 | You can ask the target agent to handle the trace buffer as a | |
3092 | circular buffer, discarding the oldest trace frames to make room for | |
3093 | newer ones, by setting circular-trace-buffer to on. This feature may | |
3094 | not be available for all target agents. | |
3095 | ||
21a0512e PP |
3096 | * Changed commands |
3097 | ||
3098 | disassemble | |
3099 | The disassemble command, when invoked with two arguments, now requires | |
3100 | the arguments to be comma-separated. | |
3101 | ||
0fe7935b DJ |
3102 | info variables |
3103 | The info variables command now displays variable definitions. Files | |
3104 | which only declare a variable are not shown. | |
3105 | ||
fb2e7cb4 JB |
3106 | source |
3107 | The source command is now capable of sourcing Python scripts. | |
3108 | This feature is dependent on the debugger being build with Python | |
3109 | support. | |
3110 | ||
3111 | Related to this enhancement is also the introduction of a new command | |
3112 | "set script-extension" (see below). | |
3113 | ||
6c95b8df PA |
3114 | * New commands (for set/show, see "New options" below) |
3115 | ||
399cd161 MS |
3116 | record save [<FILENAME>] |
3117 | Save a file (in core file format) containing the process record | |
3118 | execution log for replay debugging at a later time. | |
3119 | ||
3120 | record restore <FILENAME> | |
3121 | Restore the process record execution log that was saved at an | |
3122 | earlier time, for replay debugging. | |
3123 | ||
6c95b8df PA |
3124 | add-inferior [-copies <N>] [-exec <FILENAME>] |
3125 | Add a new inferior. | |
3126 | ||
3127 | clone-inferior [-copies <N>] [ID] | |
3128 | Make a new inferior ready to execute the same program another | |
3129 | inferior has loaded. | |
3130 | ||
3131 | remove-inferior ID | |
3132 | Remove an inferior. | |
3133 | ||
3134 | maint info program-spaces | |
3135 | List the program spaces loaded into GDB. | |
3136 | ||
9a7071a8 JB |
3137 | set remote interrupt-sequence [Ctrl-C | BREAK | BREAK-g] |
3138 | show remote interrupt-sequence | |
3139 | Allow the user to select one of ^C, a BREAK signal or BREAK-g | |
3140 | as the sequence to the remote target in order to interrupt the execution. | |
3141 | Ctrl-C is a default. Some system prefers BREAK which is high level of | |
3142 | serial line for some certain time. Linux kernel prefers BREAK-g, a.k.a | |
3143 | Magic SysRq g. It is BREAK signal and character 'g'. | |
3144 | ||
3145 | set remote interrupt-on-connect [on | off] | |
3146 | show remote interrupt-on-connect | |
3147 | When interrupt-on-connect is ON, gdb sends interrupt-sequence to | |
3148 | remote target when gdb connects to it. This is needed when you debug | |
3149 | Linux kernel. | |
3150 | ||
3151 | set remotebreak [on | off] | |
3152 | show remotebreak | |
3153 | Deprecated. Use "set/show remote interrupt-sequence" instead. | |
3154 | ||
f61e138d SS |
3155 | tvariable $NAME [ = EXP ] |
3156 | Create or modify a trace state variable. | |
3157 | ||
3158 | info tvariables | |
3159 | List trace state variables and their values. | |
3160 | ||
3161 | delete tvariable $NAME ... | |
3162 | Delete one or more trace state variables. | |
3163 | ||
6da95a67 SS |
3164 | teval EXPR, ... |
3165 | Evaluate the given expressions without collecting anything into the | |
3166 | trace buffer. (Valid in tracepoint actions only.) | |
3167 | ||
7a697b8d SS |
3168 | ftrace FN / FILE:LINE / *ADDR |
3169 | Define a fast tracepoint at the given function, line, or address. | |
3170 | ||
b0f02ee9 JK |
3171 | * New expression syntax |
3172 | ||
3173 | GDB now parses the 0b prefix of binary numbers the same way as GCC does. | |
3174 | GDB now parses 0b101010 identically with 42. | |
3175 | ||
6c95b8df PA |
3176 | * New options |
3177 | ||
3178 | set follow-exec-mode new|same | |
3179 | show follow-exec-mode | |
3180 | Control whether GDB reuses the same inferior across an exec call or | |
3181 | creates a new one. This is useful to be able to restart the old | |
3182 | executable after the inferior having done an exec call. | |
3183 | ||
236f1d4d SS |
3184 | set default-collect EXPR, ... |
3185 | show default-collect | |
3186 | Define a list of expressions to be collected at each tracepoint. | |
3187 | This is a useful way to ensure essential items are not overlooked, | |
3188 | such as registers or a critical global variable. | |
3189 | ||
d5551862 SS |
3190 | set disconnected-tracing |
3191 | show disconnected-tracing | |
3192 | If set to 1, the target is instructed to continue tracing if it | |
3193 | loses its connection to GDB. If 0, the target is to stop tracing | |
3194 | upon disconnection. | |
3195 | ||
4daf5ac0 SS |
3196 | set circular-trace-buffer |
3197 | show circular-trace-buffer | |
3198 | If set to on, the target is instructed to use a circular trace buffer | |
3199 | and discard the oldest trace frames instead of stopping the trace due | |
3200 | to a full trace buffer. If set to off, the trace stops when the buffer | |
3201 | fills up. Some targets may not support this. | |
3202 | ||
fb2e7cb4 JB |
3203 | set script-extension off|soft|strict |
3204 | show script-extension | |
3205 | If set to "off", the debugger does not perform any script language | |
3206 | recognition, and all sourced files are assumed to be GDB scripts. | |
3207 | If set to "soft" (the default), files are sourced according to | |
3208 | filename extension, falling back to GDB scripts if the first | |
3209 | evaluation failed. | |
3210 | If set to "strict", files are sourced according to filename extension. | |
3211 | ||
2b71fc8e JB |
3212 | set ada trust-PAD-over-XVS on|off |
3213 | show ada trust-PAD-over-XVS | |
3214 | If off, activate a workaround against a bug in the debugging information | |
3215 | generated by the compiler for PAD types (see gcc/exp_dbug.ads in | |
3216 | the GCC sources for more information about the GNAT encoding and | |
3217 | PAD types in particular). It is always safe to set this option to | |
3218 | off, but this introduces a slight performance penalty. The default | |
3219 | is on. | |
3220 | ||
de2e5182 TT |
3221 | * Python API Improvements |
3222 | ||
3223 | ** GDB provides the new class gdb.LazyString. This is useful in | |
3224 | some pretty-printing cases. The new method gdb.Value.lazy_string | |
3225 | provides a simple way to create objects of this type. | |
3226 | ||
3227 | ** The fields returned by gdb.Type.fields now have an | |
3228 | `is_base_class' attribute. | |
3229 | ||
3230 | ** The new method gdb.Type.range returns the range of an array type. | |
3231 | ||
3232 | ** The new method gdb.parse_and_eval can be used to parse and | |
3233 | evaluate an expression. | |
3234 | ||
f61e138d SS |
3235 | * New remote packets |
3236 | ||
3237 | QTDV | |
3238 | Define a trace state variable. | |
3239 | ||
3240 | qTV | |
3241 | Get the current value of a trace state variable. | |
3242 | ||
d5551862 SS |
3243 | QTDisconnected |
3244 | Set desired tracing behavior upon disconnection. | |
3245 | ||
4daf5ac0 SS |
3246 | QTBuffer:circular |
3247 | Set the trace buffer to be linear or circular. | |
3248 | ||
d5551862 SS |
3249 | qTfP, qTsP |
3250 | Get data about the tracepoints currently in use. | |
3251 | ||
2d483d34 MS |
3252 | * Bug fixes |
3253 | ||
3254 | Process record now works correctly with hardware watchpoints. | |
3255 | ||
6e0e5977 JB |
3256 | Multiple bug fixes have been made to the mips-irix port, making it |
3257 | much more reliable. In particular: | |
3258 | - Debugging threaded applications is now possible again. Previously, | |
3259 | GDB would hang while starting the program, or while waiting for | |
3260 | the program to stop at a breakpoint. | |
3261 | - Attaching to a running process no longer hangs. | |
3262 | - An error occurring while loading a core file has been fixed. | |
3263 | - Changing the value of the PC register now works again. This fixes | |
3264 | problems observed when using the "jump" command, or when calling | |
3265 | a function from GDB, or even when assigning a new value to $pc. | |
3266 | - With the "finish" and "return" commands, the return value for functions | |
3267 | returning a small array is now correctly printed. | |
3268 | - It is now possible to break on shared library code which gets executed | |
3269 | during a shared library init phase (code executed while executing | |
3270 | their .init section). Previously, the breakpoint would have no effect. | |
3271 | - GDB is now able to backtrace through the signal handler for | |
3272 | non-threaded programs. | |
3273 | ||
93c26624 JK |
3274 | PIE (Position Independent Executable) programs debugging is now supported. |
3275 | This includes debugging execution of PIC (Position Independent Code) shared | |
3276 | libraries although for that, it should be possible to run such libraries as an | |
3277 | executable program. | |
3278 | ||
abc7453d | 3279 | *** Changes in GDB 7.0 |
75feb17d | 3280 | |
4efc6507 DE |
3281 | * GDB now has an interface for JIT compilation. Applications that |
3282 | dynamically generate code can create symbol files in memory and register | |
3283 | them with GDB. For users, the feature should work transparently, and | |
3284 | for JIT developers, the interface is documented in the GDB manual in the | |
3285 | "JIT Compilation Interface" chapter. | |
3286 | ||
782b2b07 SS |
3287 | * Tracepoints may now be conditional. The syntax is as for |
3288 | breakpoints; either an "if" clause appended to the "trace" command, | |
3289 | or the "condition" command is available. GDB sends the condition to | |
3290 | the target for evaluation using the same bytecode format as is used | |
3291 | for tracepoint actions. | |
3292 | ||
53a71c06 CR |
3293 | * The disassemble command now supports: an optional /r modifier, print the |
3294 | raw instructions in hex as well as in symbolic form, and an optional /m | |
3295 | modifier to print mixed source+assembly. | |
e6158f16 | 3296 | |
e7a8dbfb HZ |
3297 | * Process record and replay |
3298 | ||
3299 | In a architecture environment that supports ``process record and | |
3300 | replay'', ``process record and replay'' target can record a log of | |
3301 | the process execution, and replay it with both forward and reverse | |
3302 | execute commands. | |
3303 | ||
64644d9b MS |
3304 | * Reverse debugging: GDB now has new commands reverse-continue, reverse- |
3305 | step, reverse-next, reverse-finish, reverse-stepi, reverse-nexti, and | |
3306 | set execution-direction {forward|reverse}, for targets that support | |
3307 | reverse execution. | |
3308 | ||
b9412953 DD |
3309 | * GDB now supports hardware watchpoints on MIPS/Linux systems. This |
3310 | feature is available with a native GDB running on kernel version | |
3311 | 2.6.28 or later. | |
3312 | ||
6c7a06a3 TT |
3313 | * GDB now has support for multi-byte and wide character sets on the |
3314 | target. Strings whose character type is wchar_t, char16_t, or | |
3315 | char32_t are now correctly printed. GDB supports wide- and unicode- | |
3316 | literals in C, that is, L'x', L"string", u'x', u"string", U'x', and | |
3317 | U"string" syntax. And, GDB allows the "%ls" and "%lc" formats in | |
3318 | `printf'. This feature requires iconv to work properly; if your | |
3319 | system does not have a working iconv, GDB can use GNU libiconv. See | |
3320 | the installation instructions for more information. | |
3321 | ||
f1838a98 UW |
3322 | * GDB now supports automatic retrieval of shared library files from |
3323 | remote targets. To use this feature, specify a system root that begins | |
3324 | with the `remote:' prefix, either via the `set sysroot' command or via | |
3325 | the `--with-sysroot' configure-time option. | |
3326 | ||
55333a84 DE |
3327 | * "info sharedlibrary" now takes an optional regex of libraries to show, |
3328 | and it now reports if a shared library has no debugging information. | |
3329 | ||
7f6a6314 PM |
3330 | * Commands `set debug-file-directory', `set solib-search-path' and `set args' |
3331 | now complete on file names. | |
3332 | ||
65d12d83 TT |
3333 | * When completing in expressions, gdb will attempt to limit |
3334 | completions to allowable structure or union fields, where appropriate. | |
3335 | For instance, consider: | |
3336 | ||
3337 | # struct example { int f1; double f2; }; | |
3338 | # struct example variable; | |
3339 | (gdb) p variable. | |
3340 | ||
3341 | If the user types TAB at the end of this command line, the available | |
3342 | completions will be "f1" and "f2". | |
3343 | ||
edb3359d DJ |
3344 | * Inlined functions are now supported. They show up in backtraces, and |
3345 | the "step", "next", and "finish" commands handle them automatically. | |
3346 | ||
2fae03e8 TT |
3347 | * GDB now supports the token-splicing (##) and stringification (#) |
3348 | operators when expanding macros. It also supports variable-arity | |
3349 | macros. | |
3350 | ||
47a3467a | 3351 | * GDB now supports inspecting extra signal information, exported by |
58d6951d DJ |
3352 | the new $_siginfo convenience variable. The feature is currently |
3353 | implemented on linux ARM, i386 and amd64. | |
3354 | ||
3355 | * GDB can now display the VFP floating point registers and NEON vector | |
3356 | registers on ARM targets. Both ARM GNU/Linux native GDB and gdbserver | |
3357 | can provide these registers (requires Linux 2.6.30 or later). Remote | |
3358 | and simulator targets may also provide them. | |
47a3467a | 3359 | |
08388c79 DE |
3360 | * New remote packets |
3361 | ||
3362 | qSearch:memory: | |
3363 | Search memory for a sequence of bytes. | |
3364 | ||
a6f3e723 SL |
3365 | QStartNoAckMode |
3366 | Turn off `+'/`-' protocol acknowledgments to permit more efficient | |
3367 | operation over reliable transport links. Use of this packet is | |
3368 | controlled by the `set remote noack-packet' command. | |
3369 | ||
d7713ae0 EZ |
3370 | vKill |
3371 | Kill the process with the specified process ID. Use this in preference | |
3372 | to `k' when multiprocess protocol extensions are supported. | |
3373 | ||
07e059b5 VP |
3374 | qXfer:osdata:read |
3375 | Obtains additional operating system information | |
3376 | ||
47a3467a PA |
3377 | qXfer:siginfo:read |
3378 | qXfer:siginfo:write | |
3379 | Read or write additional signal information. | |
3380 | ||
060871df PA |
3381 | * Removed remote protocol undocumented extension |
3382 | ||
3383 | An undocumented extension to the remote protocol's `S' stop reply | |
3384 | packet that permited the stub to pass a process id was removed. | |
3385 | Remote servers should use the `T' stop reply packet instead. | |
3386 | ||
c055b101 | 3387 | * GDB now supports multiple function calling conventions according to the |
a0ef4274 | 3388 | DWARF-2 DW_AT_calling_convention function attribute. |
c055b101 CV |
3389 | |
3390 | * The SH target utilizes the aforementioned change to distinguish between gcc | |
a0ef4274 DJ |
3391 | and Renesas calling convention. It also adds the new CLI commands |
3392 | `set/show sh calling-convention'. | |
c055b101 | 3393 | |
31fffb02 CS |
3394 | * GDB can now read compressed debug sections, as produced by GNU gold |
3395 | with the --compress-debug-sections=zlib flag. | |
3396 | ||
88d8a8e0 JB |
3397 | * 64-bit core files are now supported on AIX. |
3398 | ||
7f99b190 JB |
3399 | * Thread switching is now supported on Tru64. |
3400 | ||
ccd213ac DJ |
3401 | * Watchpoints can now be set on unreadable memory locations, e.g. addresses |
3402 | which will be allocated using malloc later in program execution. | |
3403 | ||
1fddbabb | 3404 | * The qXfer:libraries:read remote procotol packet now allows passing a |
31fffb02 | 3405 | list of section offsets. |
1fddbabb | 3406 | |
a0ef4274 DJ |
3407 | * On GNU/Linux, GDB can now attach to stopped processes. Several race |
3408 | conditions handling signals delivered during attach or thread creation | |
3409 | have also been fixed. | |
3410 | ||
bfb8797a | 3411 | * GDB now supports the use of DWARF boolean types for Ada's type Boolean. |
158c7665 PH |
3412 | From the user's standpoint, all unqualified instances of True and False |
3413 | are treated as the standard definitions, regardless of context. | |
bfb8797a | 3414 | |
71c25dea TT |
3415 | * GDB now parses C++ symbol and type names more flexibly. For |
3416 | example, given: | |
3417 | ||
3418 | template<typename T> class C { }; | |
3419 | C<char const *> c; | |
3420 | ||
3421 | GDB will now correctly handle all of: | |
3422 | ||
3423 | ptype C<char const *> | |
3424 | ptype C<char const*> | |
3425 | ptype C<const char *> | |
3426 | ptype C<const char*> | |
3427 | ||
ccd213ac DJ |
3428 | * New features in the GDB remote stub, gdbserver |
3429 | ||
3430 | - The "--wrapper" command-line argument tells gdbserver to use a | |
3431 | wrapper program to launch programs for debugging. | |
3432 | ||
7ae0e2a2 UW |
3433 | - On PowerPC and S/390 targets, it is now possible to use a single |
3434 | gdbserver executable to debug both 32-bit and 64-bit programs. | |
3435 | (This requires gdbserver itself to be built as a 64-bit executable.) | |
3436 | ||
a6f3e723 SL |
3437 | - gdbserver uses the new noack protocol mode for TCP connections to |
3438 | reduce communications latency, if also supported and enabled in GDB. | |
3439 | ||
da8bd9a3 DJ |
3440 | - Support for the sparc64-linux-gnu target is now included in |
3441 | gdbserver. | |
3442 | ||
d70e31dd DE |
3443 | - The amd64-linux build of gdbserver now supports debugging both |
3444 | 32-bit and 64-bit programs. | |
3445 | ||
3446 | - The i386-linux, amd64-linux, and i386-win32 builds of gdbserver | |
3447 | now support hardware watchpoints, and will use them automatically | |
3448 | as appropriate. | |
3449 | ||
d57a3c85 TJB |
3450 | * Python scripting |
3451 | ||
3452 | GDB now has support for scripting using Python. Whether this is | |
3453 | available is determined at configure time. | |
3454 | ||
d8906c6f TJB |
3455 | New GDB commands can now be written in Python. |
3456 | ||
aadc346a JB |
3457 | * Ada tasking support |
3458 | ||
3459 | Ada tasks can now be inspected in GDB. The following commands have | |
3460 | been introduced: | |
3461 | ||
3462 | info tasks | |
3463 | Print the list of Ada tasks. | |
3464 | info task N | |
3465 | Print detailed information about task number N. | |
3466 | task | |
3467 | Print the task number of the current task. | |
3468 | task N | |
3469 | Switch the context of debugging to task number N. | |
3470 | ||
adb483fe DJ |
3471 | * Support for user-defined prefixed commands. The "define" command can |
3472 | add new commands to existing prefixes, e.g. "target". | |
3473 | ||
2277426b PA |
3474 | * Multi-inferior, multi-process debugging. |
3475 | ||
3476 | GDB now has generalized support for multi-inferior debugging. See | |
3477 | "Debugging Multiple Inferiors" in the manual for more information. | |
3478 | Although availability still depends on target support, the command | |
3479 | set is more uniform now. The GNU/Linux specific multi-forks support | |
3480 | has been migrated to this new framework. This implied some user | |
3481 | visible changes; see "New commands" and also "Removed commands" | |
3482 | below. | |
3483 | ||
08d16641 PA |
3484 | * Target descriptions can now describe the target OS ABI. See the |
3485 | "Target Description Format" section in the user manual for more | |
3486 | information. | |
3487 | ||
e35359c5 UW |
3488 | * Target descriptions can now describe "compatible" architectures |
3489 | to indicate that the target can execute applications for a different | |
3490 | architecture in addition to those for the main target architecture. | |
3491 | See the "Target Description Format" section in the user manual for | |
3492 | more information. | |
3493 | ||
85e747d2 UW |
3494 | * Multi-architecture debugging. |
3495 | ||
3496 | GDB now includes general supports for debugging applications on | |
3497 | hybrid systems that use more than one single processor architecture | |
3498 | at the same time. Each such hybrid architecture still requires | |
3499 | specific support to be added. The only hybrid architecture supported | |
3500 | in this version of GDB is the Cell Broadband Engine. | |
3501 | ||
3502 | * GDB now supports integrated debugging of Cell/B.E. applications that | |
3503 | use both the PPU and SPU architectures. To enable support for hybrid | |
3504 | Cell/B.E. debugging, you need to configure GDB to support both the | |
3505 | powerpc-linux or powerpc64-linux and the spu-elf targets, using the | |
3506 | --enable-targets configure option. | |
3507 | ||
11ade57a PA |
3508 | * Non-stop mode debugging. |
3509 | ||
3510 | For some targets, GDB now supports an optional mode of operation in | |
3511 | which you can examine stopped threads while other threads continue | |
3512 | to execute freely. This is referred to as non-stop mode, with the | |
3513 | old mode referred to as all-stop mode. See the "Non-Stop Mode" | |
3514 | section in the user manual for more information. | |
3515 | ||
3516 | To be able to support remote non-stop debugging, a remote stub needs | |
3517 | to implement the non-stop mode remote protocol extensions, as | |
3518 | described in the "Remote Non-Stop" section of the user manual. The | |
3519 | GDB remote stub, gdbserver, has been adjusted to support these | |
3520 | extensions on linux targets. | |
3521 | ||
d7713ae0 | 3522 | * New commands (for set/show, see "New options" below) |
75feb17d | 3523 | |
a96d9b2e SDJ |
3524 | catch syscall [NAME(S) | NUMBER(S)] |
3525 | Catch system calls. Arguments, which should be names of system | |
3526 | calls or their numbers, mean catch only those syscalls. Without | |
3527 | arguments, every syscall will be caught. When the inferior issues | |
3528 | any of the specified syscalls, GDB will stop and announce the system | |
3529 | call, both when it is called and when its call returns. This | |
3530 | feature is currently available with a native GDB running on the | |
3531 | Linux Kernel, under the following architectures: x86, x86_64, | |
3532 | PowerPC and PowerPC64. | |
3533 | ||
08388c79 DE |
3534 | find [/size-char] [/max-count] start-address, end-address|+search-space-size, |
3535 | val1 [, val2, ...] | |
3536 | Search memory for a sequence of bytes. | |
3537 | ||
d57a3c85 TJB |
3538 | maint set python print-stack |
3539 | maint show python print-stack | |
3540 | Show a stack trace when an error is encountered in a Python script. | |
3541 | ||
3542 | python [CODE] | |
3543 | Invoke CODE by passing it to the Python interpreter. | |
3544 | ||
d7713ae0 EZ |
3545 | macro define |
3546 | macro list | |
3547 | macro undef | |
3548 | These allow macros to be defined, undefined, and listed | |
3549 | interactively. | |
3550 | ||
3551 | info os processes | |
3552 | Show operating system information about processes. | |
3553 | ||
2277426b PA |
3554 | info inferiors |
3555 | List the inferiors currently under GDB's control. | |
3556 | ||
3557 | inferior NUM | |
3558 | Switch focus to inferior number NUM. | |
3559 | ||
3560 | detach inferior NUM | |
3561 | Detach from inferior number NUM. | |
3562 | ||
3563 | kill inferior NUM | |
3564 | Kill inferior number NUM. | |
3565 | ||
d7713ae0 EZ |
3566 | * New options |
3567 | ||
3285f3fe UW |
3568 | set spu stop-on-load |
3569 | show spu stop-on-load | |
3570 | Control whether to stop for new SPE threads during Cell/B.E. debugging. | |
3571 | ||
ff1a52c6 UW |
3572 | set spu auto-flush-cache |
3573 | show spu auto-flush-cache | |
3574 | Control whether to automatically flush the software-managed cache | |
3575 | during Cell/B.E. debugging. | |
3576 | ||
d7713ae0 EZ |
3577 | set sh calling-convention |
3578 | show sh calling-convention | |
3579 | Control the calling convention used when calling SH target functions. | |
3580 | ||
e0a3ce09 | 3581 | set debug timestamp |
75feb17d | 3582 | show debug timestamp |
d7713ae0 EZ |
3583 | Control display of timestamps with GDB debugging output. |
3584 | ||
3585 | set disassemble-next-line | |
3586 | show disassemble-next-line | |
3587 | Control display of disassembled source lines or instructions when | |
3588 | the debuggee stops. | |
3589 | ||
3590 | set remote noack-packet | |
3591 | show remote noack-packet | |
3592 | Set/show the use of remote protocol QStartNoAckMode packet. See above | |
3593 | under "New remote packets." | |
3594 | ||
3595 | set remote query-attached-packet | |
3596 | show remote query-attached-packet | |
3597 | Control use of remote protocol `qAttached' (query-attached) packet. | |
3598 | ||
3599 | set remote read-siginfo-object | |
3600 | show remote read-siginfo-object | |
3601 | Control use of remote protocol `qXfer:siginfo:read' (read-siginfo-object) | |
3602 | packet. | |
3603 | ||
3604 | set remote write-siginfo-object | |
3605 | show remote write-siginfo-object | |
3606 | Control use of remote protocol `qXfer:siginfo:write' (write-siginfo-object) | |
3607 | packet. | |
3608 | ||
40ab02ce MS |
3609 | set remote reverse-continue |
3610 | show remote reverse-continue | |
3611 | Control use of remote protocol 'bc' (reverse-continue) packet. | |
3612 | ||
3613 | set remote reverse-step | |
3614 | show remote reverse-step | |
3615 | Control use of remote protocol 'bs' (reverse-step) packet. | |
3616 | ||
d7713ae0 EZ |
3617 | set displaced-stepping |
3618 | show displaced-stepping | |
3619 | Control displaced stepping mode. Displaced stepping is a way to | |
3620 | single-step over breakpoints without removing them from the debuggee. | |
3621 | Also known as "out-of-line single-stepping". | |
3622 | ||
3623 | set debug displaced | |
3624 | show debug displaced | |
3625 | Control display of debugging info for displaced stepping. | |
3626 | ||
3627 | maint set internal-error | |
3628 | maint show internal-error | |
3629 | Control what GDB does when an internal error is detected. | |
3630 | ||
3631 | maint set internal-warning | |
3632 | maint show internal-warning | |
3633 | Control what GDB does when an internal warning is detected. | |
75feb17d | 3634 | |
ccd213ac DJ |
3635 | set exec-wrapper |
3636 | show exec-wrapper | |
3637 | unset exec-wrapper | |
3638 | Use a wrapper program to launch programs for debugging. | |
fa4727a6 | 3639 | |
aad4b048 JB |
3640 | set multiple-symbols (all|ask|cancel) |
3641 | show multiple-symbols | |
3642 | The value of this variable can be changed to adjust the debugger behavior | |
3643 | when an expression or a breakpoint location contains an ambiguous symbol | |
3644 | name (an overloaded function name, for instance). | |
3645 | ||
74960c60 VP |
3646 | set breakpoint always-inserted |
3647 | show breakpoint always-inserted | |
3648 | Keep breakpoints always inserted in the target, as opposed to inserting | |
3649 | them when resuming the target, and removing them when the target stops. | |
3650 | This option can improve debugger performance on slow remote targets. | |
3651 | ||
0428b8f5 DJ |
3652 | set arm fallback-mode (arm|thumb|auto) |
3653 | show arm fallback-mode | |
3654 | set arm force-mode (arm|thumb|auto) | |
3655 | show arm force-mode | |
3656 | These commands control how ARM GDB determines whether instructions | |
3657 | are ARM or Thumb. The default for both settings is auto, which uses | |
3658 | the current CPSR value for instructions without symbols; previous | |
3659 | versions of GDB behaved as if "set arm fallback-mode arm". | |
3660 | ||
10568435 JK |
3661 | set disable-randomization |
3662 | show disable-randomization | |
3663 | Standalone programs run with the virtual address space randomization enabled | |
3664 | by default on some platforms. This option keeps the addresses stable across | |
3665 | multiple debugging sessions. | |
3666 | ||
d7713ae0 EZ |
3667 | set non-stop |
3668 | show non-stop | |
3669 | Control whether other threads are stopped or not when some thread hits | |
3670 | a breakpoint. | |
3671 | ||
b3eb342c | 3672 | set target-async |
d7713ae0 | 3673 | show target-async |
b3eb342c VP |
3674 | Requests that asynchronous execution is enabled in the target, if available. |
3675 | In this case, it's possible to resume target in the background, and interact | |
3676 | with GDB while the target is running. "show target-async" displays the | |
3677 | current state of asynchronous execution of the target. | |
3678 | ||
6c7a06a3 TT |
3679 | set target-wide-charset |
3680 | show target-wide-charset | |
3681 | The target-wide-charset is the name of the character set that GDB | |
3682 | uses when printing characters whose type is wchar_t. | |
3683 | ||
84603566 SL |
3684 | set tcp auto-retry (on|off) |
3685 | show tcp auto-retry | |
3686 | set tcp connect-timeout | |
3687 | show tcp connect-timeout | |
3688 | These commands allow GDB to retry failed TCP connections to a remote stub | |
3689 | with a specified timeout period; this is useful if the stub is launched | |
3690 | in parallel with GDB but may not be ready to accept connections immediately. | |
3691 | ||
17a37d48 PP |
3692 | set libthread-db-search-path |
3693 | show libthread-db-search-path | |
3694 | Control list of directories which GDB will search for appropriate | |
3695 | libthread_db. | |
3696 | ||
d4db2f36 PA |
3697 | set schedule-multiple (on|off) |
3698 | show schedule-multiple | |
3699 | Allow GDB to resume all threads of all processes or only threads of | |
3700 | the current process. | |
3701 | ||
4e5d721f DE |
3702 | set stack-cache |
3703 | show stack-cache | |
3704 | Use more aggressive caching for accesses to the stack. This improves | |
3705 | performance of remote debugging (particularly backtraces) without | |
3706 | affecting correctness. | |
3707 | ||
910c5da8 JB |
3708 | set interactive-mode (on|off|auto) |
3709 | show interactive-mode | |
3710 | Control whether GDB runs in interactive mode (on) or not (off). | |
3711 | When in interactive mode, GDB waits for the user to answer all | |
3712 | queries. Otherwise, GDB does not wait and assumes the default | |
3713 | answer. When set to auto (the default), GDB determines which | |
3714 | mode to use based on the stdin settings. | |
3715 | ||
2277426b PA |
3716 | * Removed commands |
3717 | ||
3718 | info forks | |
3719 | For program forks, this is replaced by the new more generic `info | |
3720 | inferiors' command. To list checkpoints, you can still use the | |
3721 | `info checkpoints' command, which was an alias for the `info forks' | |
3722 | command. | |
3723 | ||
3724 | fork NUM | |
3725 | Replaced by the new `inferior' command. To switch between | |
3726 | checkpoints, you can still use the `restart' command, which was an | |
3727 | alias for the `fork' command. | |
3728 | ||
3729 | process PID | |
3730 | This is removed, since some targets don't have a notion of | |
3731 | processes. To switch between processes, you can still use the | |
3732 | `inferior' command using GDB's own inferior number. | |
3733 | ||
3734 | delete fork NUM | |
3735 | For program forks, this is replaced by the new more generic `kill | |
3736 | inferior' command. To delete a checkpoint, you can still use the | |
3737 | `delete checkpoint' command, which was an alias for the `delete | |
3738 | fork' command. | |
3739 | ||
3740 | detach fork NUM | |
3741 | For program forks, this is replaced by the new more generic `detach | |
3742 | inferior' command. To detach a checkpoint, you can still use the | |
3743 | `detach checkpoint' command, which was an alias for the `detach | |
3744 | fork' command. | |
3745 | ||
a80b95ba TG |
3746 | * New native configurations |
3747 | ||
3748 | x86/x86_64 Darwin i[34567]86-*-darwin* | |
3749 | ||
b8bfd3ed JB |
3750 | x86_64 MinGW x86_64-*-mingw* |
3751 | ||
75a2d5e7 TT |
3752 | * New targets |
3753 | ||
c28c63d8 | 3754 | Lattice Mico32 lm32-* |
75a2d5e7 | 3755 | x86 DICOS i[34567]86-*-dicos* |
4c1d2973 | 3756 | x86_64 DICOS x86_64-*-dicos* |
5f814c3b | 3757 | S+core 3 score-*-* |
75a2d5e7 | 3758 | |
6de3146c PA |
3759 | * The GDB remote stub, gdbserver, now supports x86 Windows CE |
3760 | (mingw32ce) debugging. | |
3761 | ||
d5cbbe6e JB |
3762 | * Removed commands |
3763 | ||
3764 | catch load | |
3765 | catch unload | |
3766 | These commands were actually not implemented on any target. | |
3767 | ||
75feb17d | 3768 | *** Changes in GDB 6.8 |
f9ed52be | 3769 | |
af5ca30d NH |
3770 | * New native configurations |
3771 | ||
3772 | NetBSD/hppa hppa*-*netbsd* | |
94a0e877 | 3773 | Xtensa GNU/Linux xtensa*-*-linux* |
af5ca30d NH |
3774 | |
3775 | * New targets | |
3776 | ||
3777 | NetBSD/hppa hppa*-*-netbsd* | |
94a0e877 | 3778 | Xtensa GNU/Lunux xtensa*-*-linux* |
af5ca30d | 3779 | |
7a404eba PA |
3780 | * Change in command line behavior -- corefiles vs. process ids. |
3781 | ||
3782 | When the '-p NUMBER' or '--pid NUMBER' options are used, and | |
3783 | attaching to process NUMBER fails, GDB no longer attempts to open a | |
3784 | core file named NUMBER. Attaching to a program using the -c option | |
3785 | is no longer supported. Instead, use the '-p' or '--pid' options. | |
3786 | ||
430ebac9 PA |
3787 | * GDB can now be built as a native debugger for debugging Windows x86 |
3788 | (mingw32) Portable Executable (PE) programs. | |
3789 | ||
fe6fbf8b | 3790 | * Pending breakpoints no longer change their number when their address |
8d5f9c6f | 3791 | is resolved. |
fe6fbf8b VP |
3792 | |
3793 | * GDB now supports breakpoints with multiple locations, | |
8d5f9c6f DJ |
3794 | including breakpoints on C++ constructors, inside C++ templates, |
3795 | and in inlined functions. | |
fe6fbf8b | 3796 | |
10665d76 JB |
3797 | * GDB's ability to debug optimized code has been improved. GDB more |
3798 | accurately identifies function bodies and lexical blocks that occupy | |
3799 | more than one contiguous range of addresses. | |
3800 | ||
7cc46491 DJ |
3801 | * Target descriptions can now describe registers for PowerPC. |
3802 | ||
d71340b8 DJ |
3803 | * The GDB remote stub, gdbserver, now supports the AltiVec and SPE |
3804 | registers on PowerPC targets. | |
3805 | ||
523c4513 DJ |
3806 | * The GDB remote stub, gdbserver, now supports thread debugging on GNU/Linux |
3807 | targets even when the libthread_db library is not available. | |
3808 | ||
a6b151f1 DJ |
3809 | * The GDB remote stub, gdbserver, now supports the new file transfer |
3810 | commands (remote put, remote get, and remote delete). | |
3811 | ||
2d717e4f DJ |
3812 | * The GDB remote stub, gdbserver, now supports run and attach in |
3813 | extended-remote mode. | |
3814 | ||
24a836bd | 3815 | * hppa*64*-*-hpux11* target broken |
d001be7a DJ |
3816 | The debugger is unable to start a program and fails with the following |
3817 | error: "Error trying to get information about dynamic linker". | |
3818 | The gdb-6.7 release is also affected. | |
24a836bd | 3819 | |
d0c678e6 UW |
3820 | * GDB now supports the --enable-targets= configure option to allow |
3821 | building a single GDB executable that supports multiple remote | |
3822 | target architectures. | |
3823 | ||
d64a946d TJB |
3824 | * GDB now supports debugging C and C++ programs which use the |
3825 | Decimal Floating Point extension. In addition, the PowerPC target | |
3826 | now has a set of pseudo-registers to inspect decimal float values | |
3827 | stored in two consecutive float registers. | |
3828 | ||
ee163bf5 VP |
3829 | * The -break-insert MI command can optionally create pending |
3830 | breakpoints now. | |
3831 | ||
b93b6ca7 | 3832 | * Improved support for debugging Ada |
d001be7a DJ |
3833 | Many improvements to the Ada language support have been made. These |
3834 | include: | |
b93b6ca7 JB |
3835 | - Better support for Ada2005 interface types |
3836 | - Improved handling of arrays and slices in general | |
3837 | - Better support for Taft-amendment types | |
3838 | - The '{type} ADDRESS' expression is now allowed on the left hand-side | |
3839 | of an assignment | |
3840 | - Improved command completion in Ada | |
3841 | - Several bug fixes | |
3842 | ||
d001be7a DJ |
3843 | * GDB on GNU/Linux and HP/UX can now debug through "exec" of a new |
3844 | process. | |
3845 | ||
a6b151f1 DJ |
3846 | * New commands |
3847 | ||
6d53d0af JB |
3848 | set print frame-arguments (all|scalars|none) |
3849 | show print frame-arguments | |
3850 | The value of this variable can be changed to control which argument | |
3851 | values should be printed by the debugger when displaying a frame. | |
3852 | ||
a6b151f1 DJ |
3853 | remote put |
3854 | remote get | |
3855 | remote delete | |
3856 | Transfer files to and from a remote target, and delete remote files. | |
3857 | ||
3858 | * New MI commands | |
3859 | ||
3860 | -target-file-put | |
3861 | -target-file-get | |
3862 | -target-file-delete | |
3863 | Transfer files to and from a remote target, and delete remote files. | |
3864 | ||
3865 | * New remote packets | |
3866 | ||
3867 | vFile:open: | |
3868 | vFile:close: | |
3869 | vFile:pread: | |
3870 | vFile:pwrite: | |
3871 | vFile:unlink: | |
3872 | Open, close, read, write, and delete files on the remote system. | |
d0c678e6 | 3873 | |
2d717e4f DJ |
3874 | vAttach |
3875 | Attach to an existing process on the remote system, in extended-remote | |
3876 | mode. | |
3877 | ||
3878 | vRun | |
3879 | Run a new process on the remote system, in extended-remote mode. | |
3880 | ||
8d5f9c6f | 3881 | *** Changes in GDB 6.7 |
6dd09645 | 3882 | |
19d378fc MS |
3883 | * Resolved 101 resource leaks, null pointer dereferences, etc. in gdb, |
3884 | bfd, libiberty and opcodes, as revealed by static analysis donated by | |
3885 | Coverity, Inc. (http://scan.coverity.com). | |
3886 | ||
3a40aaa0 UW |
3887 | * When looking up multiply-defined global symbols, GDB will now prefer the |
3888 | symbol definition in the current shared library if it was built using the | |
3889 | -Bsymbolic linker option. | |
3890 | ||
a6ec25f2 BW |
3891 | * When the Text User Interface (TUI) is not configured, GDB will now |
3892 | recognize the -tui command-line option and print a message that the TUI | |
3893 | is not supported. | |
3894 | ||
6dd09645 JB |
3895 | * The GDB remote stub, gdbserver, now has lower overhead for high |
3896 | frequency signals (e.g. SIGALRM) via the QPassSignals packet. | |
3897 | ||
c9bb8148 DJ |
3898 | * GDB for MIPS targets now autodetects whether a remote target provides |
3899 | 32-bit or 64-bit register values. | |
3900 | ||
0d5de010 DJ |
3901 | * Support for C++ member pointers has been improved. |
3902 | ||
23181151 DJ |
3903 | * GDB now understands XML target descriptions, which specify the |
3904 | target's overall architecture. GDB can read a description from | |
3905 | a local file or over the remote serial protocol. | |
3906 | ||
ea37ba09 DJ |
3907 | * Vectors of single-byte data use a new integer type which is not |
3908 | automatically displayed as character or string data. | |
3909 | ||
3910 | * The /s format now works with the print command. It displays | |
3911 | arrays of single-byte integers and pointers to single-byte integers | |
3912 | as strings. | |
e1f48ead | 3913 | |
123dc839 DJ |
3914 | * Target descriptions can now describe target-specific registers, |
3915 | for architectures which have implemented the support (currently | |
8d5f9c6f | 3916 | only ARM, M68K, and MIPS). |
123dc839 | 3917 | |
05a4558a DJ |
3918 | * GDB and the GDB remote stub, gdbserver, now support the XScale |
3919 | iWMMXt coprocessor. | |
fb1e4ffc | 3920 | |
7c963485 PA |
3921 | * The GDB remote stub, gdbserver, has been updated to support |
3922 | ARM Windows CE (mingw32ce) debugging, and GDB Windows CE support | |
3923 | has been rewritten to use the standard GDB remote protocol. | |
3924 | ||
b18be20d DJ |
3925 | * GDB can now step into C++ functions which are called through thunks. |
3926 | ||
0ca420ce UW |
3927 | * GDB for the Cell/B.E. SPU now supports overlay debugging. |
3928 | ||
31d99776 DJ |
3929 | * The GDB remote protocol "qOffsets" packet can now honor ELF segment |
3930 | layout. It also supports a TextSeg= and DataSeg= response when only | |
3931 | segment base addresses (rather than offsets) are available. | |
3932 | ||
a4642986 MR |
3933 | * The /i format now outputs any trailing branch delay slot instructions |
3934 | immediately following the last instruction within the count specified. | |
3935 | ||
cfa9d6d9 DJ |
3936 | * The GDB remote protocol "T" stop reply packet now supports a |
3937 | "library" response. Combined with the new "qXfer:libraries:read" | |
3938 | packet, this response allows GDB to debug shared libraries on targets | |
3939 | where the operating system manages the list of loaded libraries (e.g. | |
3940 | Windows and SymbianOS). | |
255e7678 DJ |
3941 | |
3942 | * The GDB remote stub, gdbserver, now supports dynamic link libraries | |
3943 | (DLLs) on Windows and Windows CE targets. | |
f5db8714 JK |
3944 | |
3945 | * GDB now supports a faster verification that a .debug file matches its binary | |
3946 | according to its build-id signature, if the signature is present. | |
cfa9d6d9 | 3947 | |
c9bb8148 DJ |
3948 | * New commands |
3949 | ||
23776285 MR |
3950 | set remoteflow |
3951 | show remoteflow | |
3952 | Enable or disable hardware flow control (RTS/CTS) on the serial port | |
3953 | when debugging using remote targets. | |
3954 | ||
c9bb8148 DJ |
3955 | set mem inaccessible-by-default |
3956 | show mem inaccessible-by-default | |
3957 | If the target supplies a memory map, for instance via the remote | |
3958 | protocol's "qXfer:memory-map:read" packet, setting this variable | |
3959 | prevents GDB from accessing memory outside the memory map. This | |
3960 | is useful for targets with memory mapped registers or which react | |
3961 | badly to accesses of unmapped address space. | |
3962 | ||
3963 | set breakpoint auto-hw | |
3964 | show breakpoint auto-hw | |
3965 | If the target supplies a memory map, for instance via the remote | |
3966 | protocol's "qXfer:memory-map:read" packet, setting this variable | |
3967 | lets GDB use hardware breakpoints automatically for memory regions | |
3968 | where it can not use software breakpoints. This covers both the | |
3969 | "break" command and internal breakpoints used for other commands | |
3970 | including "next" and "finish". | |
3971 | ||
0e420bd8 JB |
3972 | catch exception |
3973 | catch exception unhandled | |
3974 | Stop the program execution when Ada exceptions are raised. | |
3975 | ||
3976 | catch assert | |
3977 | Stop the program execution when an Ada assertion failed. | |
3978 | ||
f822c95b DJ |
3979 | set sysroot |
3980 | show sysroot | |
3981 | Set an alternate system root for target files. This is a more | |
3982 | general version of "set solib-absolute-prefix", which is now | |
3983 | an alias to "set sysroot". | |
3984 | ||
83cc5c53 UW |
3985 | info spu |
3986 | Provide extended SPU facility status information. This set of | |
3987 | commands is available only when debugging the Cell/B.E. SPU | |
3988 | architecture. | |
3989 | ||
bd372731 MK |
3990 | * New native configurations |
3991 | ||
3992 | OpenBSD/sh sh*-*openbsd* | |
3993 | ||
23181151 DJ |
3994 | set tdesc filename |
3995 | unset tdesc filename | |
3996 | show tdesc filename | |
3997 | Use the specified local file as an XML target description, and do | |
3998 | not query the target for its built-in description. | |
3999 | ||
c9bb8148 DJ |
4000 | * New targets |
4001 | ||
54fe9172 | 4002 | OpenBSD/sh sh*-*-openbsd* |
c9bb8148 | 4003 | MIPS64 GNU/Linux (gdbserver) mips64-linux-gnu |
c077150c | 4004 | Toshiba Media Processor mep-elf |
c9bb8148 | 4005 | |
6dd09645 JB |
4006 | * New remote packets |
4007 | ||
4008 | QPassSignals: | |
4009 | Ignore the specified signals; pass them directly to the debugged program | |
4010 | without stopping other threads or reporting them to GDB. | |
4011 | ||
23181151 DJ |
4012 | qXfer:features:read: |
4013 | Read an XML target description from the target, which describes its | |
4014 | features. | |
6dd09645 | 4015 | |
83cc5c53 UW |
4016 | qXfer:spu:read: |
4017 | qXfer:spu:write: | |
4018 | Read or write contents of an spufs file on the target system. These | |
4019 | packets are available only on the Cell/B.E. SPU architecture. | |
4020 | ||
cfa9d6d9 DJ |
4021 | qXfer:libraries:read: |
4022 | Report the loaded shared libraries. Combined with new "T" packet | |
4023 | response, this packet allows GDB to debug shared libraries on | |
4024 | targets where the operating system manages the list of loaded | |
4025 | libraries (e.g. Windows and SymbianOS). | |
4026 | ||
483367ee DJ |
4027 | * Removed targets |
4028 | ||
4029 | Support for these obsolete configurations has been removed. | |
4030 | ||
d08950c4 UW |
4031 | alpha*-*-osf1* |
4032 | alpha*-*-osf2* | |
7ce59000 | 4033 | d10v-*-* |
483367ee DJ |
4034 | hppa*-*-hiux* |
4035 | i[34567]86-ncr-* | |
4036 | i[34567]86-*-dgux* | |
4037 | i[34567]86-*-lynxos* | |
4038 | i[34567]86-*-netware* | |
4039 | i[34567]86-*-sco3.2v5* | |
4040 | i[34567]86-*-sco3.2v4* | |
4041 | i[34567]86-*-sco* | |
4042 | i[34567]86-*-sysv4.2* | |
4043 | i[34567]86-*-sysv4* | |
4044 | i[34567]86-*-sysv5* | |
4045 | i[34567]86-*-unixware2* | |
4046 | i[34567]86-*-unixware* | |
4047 | i[34567]86-*-sysv* | |
4048 | i[34567]86-*-isc* | |
4049 | m68*-cisco*-* | |
4050 | m68*-tandem-* | |
ad527d2e | 4051 | mips*-*-pe |
483367ee | 4052 | rs6000-*-lynxos* |
ad527d2e | 4053 | sh*-*-pe |
483367ee | 4054 | |
7ce59000 DJ |
4055 | * Other removed features |
4056 | ||
4057 | target abug | |
4058 | target cpu32bug | |
4059 | target est | |
4060 | target rom68k | |
4061 | ||
4062 | Various m68k-only ROM monitors. | |
4063 | ||
ea35711c DJ |
4064 | target hms |
4065 | target e7000 | |
4066 | target sh3 | |
4067 | target sh3e | |
4068 | ||
4069 | Various Renesas ROM monitors and debugging interfaces for SH and | |
4070 | H8/300. | |
4071 | ||
4072 | target ocd | |
4073 | ||
4074 | Support for a Macraigor serial interface to on-chip debugging. | |
4075 | GDB does not directly support the newer parallel or USB | |
4076 | interfaces. | |
4077 | ||
7ce59000 DJ |
4078 | DWARF 1 support |
4079 | ||
4080 | A debug information format. The predecessor to DWARF 2 and | |
4081 | DWARF 3, which are still supported. | |
4082 | ||
54d61198 DJ |
4083 | Support for the HP aCC compiler on HP-UX/PA-RISC |
4084 | ||
4085 | SOM-encapsulated symbolic debugging information, automatic | |
4086 | invocation of pxdb, and the aCC custom C++ ABI. This does not | |
4087 | affect HP-UX for Itanium or GCC for HP-UX/PA-RISC. Code compiled | |
4088 | with aCC can still be debugged on an assembly level. | |
4089 | ||
ea35711c DJ |
4090 | MIPS ".pdr" sections |
4091 | ||
4092 | A MIPS-specific format used to describe stack frame layout | |
4093 | in debugging information. | |
4094 | ||
4095 | Scheme support | |
4096 | ||
4097 | GDB could work with an older version of Guile to debug | |
4098 | the interpreter and Scheme programs running in it. | |
4099 | ||
1a69e1e4 DJ |
4100 | set mips stack-arg-size |
4101 | set mips saved-gpreg-size | |
4102 | ||
4103 | Use "set mips abi" to control parameter passing for MIPS. | |
4104 | ||
6dd09645 | 4105 | *** Changes in GDB 6.6 |
e374b601 | 4106 | |
ca3bf3bd DJ |
4107 | * New targets |
4108 | ||
4109 | Xtensa xtensa-elf | |
9c309e77 | 4110 | Cell Broadband Engine SPU spu-elf |
ca3bf3bd | 4111 | |
6aec2e11 DJ |
4112 | * GDB can now be configured as a cross-debugger targeting native Windows |
4113 | (mingw32) or Cygwin. It can communicate with a remote debugging stub | |
4114 | running on a Windows system over TCP/IP to debug Windows programs. | |
4115 | ||
4116 | * The GDB remote stub, gdbserver, has been updated to support Windows and | |
4117 | Cygwin debugging. Both single-threaded and multi-threaded programs are | |
4118 | supported. | |
4119 | ||
17218d91 DJ |
4120 | * The "set trust-readonly-sections" command works again. This command was |
4121 | broken in GDB 6.3, 6.4, and 6.5. | |
4122 | ||
9ebce043 DJ |
4123 | * The "load" command now supports writing to flash memory, if the remote |
4124 | stub provides the required support. | |
4125 | ||
7d3d3ece DJ |
4126 | * Support for GNU/Linux Thread Local Storage (TLS, per-thread variables) no |
4127 | longer requires symbolic debug information (e.g. DWARF-2). | |
4128 | ||
4f8253f3 JB |
4129 | * New commands |
4130 | ||
4131 | set substitute-path | |
4132 | unset substitute-path | |
4133 | show substitute-path | |
4134 | Manage a list of substitution rules that GDB uses to rewrite the name | |
4135 | of the directories where the sources are located. This can be useful | |
4136 | for instance when the sources were moved to a different location | |
4137 | between compilation and debugging. | |
4138 | ||
9fa66fd7 AS |
4139 | set trace-commands |
4140 | show trace-commands | |
4141 | Print each CLI command as it is executed. Each command is prefixed with | |
4142 | a number of `+' symbols representing the nesting depth. | |
4143 | The source command now has a `-v' option to enable the same feature. | |
4144 | ||
1f5befc1 DJ |
4145 | * REMOVED features |
4146 | ||
4147 | The ARM Demon monitor support (RDP protocol, "target rdp"). | |
4148 | ||
2ec3381a DJ |
4149 | Kernel Object Display, an embedded debugging feature which only worked with |
4150 | an obsolete version of Cisco IOS. | |
4151 | ||
3d00d119 DJ |
4152 | The 'set download-write-size' and 'show download-write-size' commands. |
4153 | ||
be2a5f71 DJ |
4154 | * New remote packets |
4155 | ||
4156 | qSupported: | |
4157 | Tell a stub about GDB client features, and request remote target features. | |
4158 | The first feature implemented is PacketSize, which allows the target to | |
4159 | specify the size of packets it can handle - to minimize the number of | |
4160 | packets required and improve performance when connected to a remote | |
4161 | target. | |
4162 | ||
0876f84a DJ |
4163 | qXfer:auxv:read: |
4164 | Fetch an OS auxilliary vector from the remote stub. This packet is a | |
4165 | more efficient replacement for qPart:auxv:read. | |
4166 | ||
9ebce043 DJ |
4167 | qXfer:memory-map:read: |
4168 | Fetch a memory map from the remote stub, including information about | |
4169 | RAM, ROM, and flash memory devices. | |
4170 | ||
4171 | vFlashErase: | |
4172 | vFlashWrite: | |
4173 | vFlashDone: | |
4174 | Erase and program a flash memory device. | |
4175 | ||
0876f84a DJ |
4176 | * Removed remote packets |
4177 | ||
4178 | qPart:auxv:read: | |
4179 | This packet has been replaced by qXfer:auxv:read. Only GDB 6.4 and 6.5 | |
4180 | used it, and only gdbserver implemented it. | |
4181 | ||
e374b601 | 4182 | *** Changes in GDB 6.5 |
53e5f3cf | 4183 | |
96309189 MS |
4184 | * New targets |
4185 | ||
4186 | Renesas M32C/M16C m32c-elf | |
4187 | ||
4188 | Morpho Technologies ms1 ms1-elf | |
4189 | ||
53e5f3cf AS |
4190 | * New commands |
4191 | ||
4192 | init-if-undefined Initialize a convenience variable, but | |
4193 | only if it doesn't already have a value. | |
4194 | ||
ac264b3b MS |
4195 | The following commands are presently only implemented for native GNU/Linux: |
4196 | ||
4197 | checkpoint Save a snapshot of the program state. | |
4198 | ||
4199 | restart <n> Return the program state to a | |
4200 | previously saved state. | |
4201 | ||
4202 | info checkpoints List currently saved checkpoints. | |
4203 | ||
4204 | delete-checkpoint <n> Delete a previously saved checkpoint. | |
4205 | ||
4206 | set|show detach-on-fork Tell gdb whether to detach from a newly | |
4207 | forked process, or to keep debugging it. | |
4208 | ||
4209 | info forks List forks of the user program that | |
4210 | are available to be debugged. | |
4211 | ||
4212 | fork <n> Switch to debugging one of several | |
4213 | forks of the user program that are | |
4214 | available to be debugged. | |
4215 | ||
4216 | delete-fork <n> Delete a fork from the list of forks | |
4217 | that are available to be debugged (and | |
4218 | kill the forked process). | |
4219 | ||
4220 | detach-fork <n> Delete a fork from the list of forks | |
4221 | that are available to be debugged (and | |
4222 | allow the process to continue). | |
4223 | ||
3950dc3f NS |
4224 | * New architecture |
4225 | ||
4226 | Morpho Technologies ms2 ms1-elf | |
4227 | ||
0ea3f30e DJ |
4228 | * Improved Windows host support |
4229 | ||
4230 | GDB now builds as a cross debugger hosted on i686-mingw32, including | |
4231 | native console support, and remote communications using either | |
4232 | network sockets or serial ports. | |
4233 | ||
f79daebb GM |
4234 | * Improved Modula-2 language support |
4235 | ||
4236 | GDB can now print most types in the Modula-2 syntax. This includes: | |
4237 | basic types, set types, record types, enumerated types, range types, | |
4238 | pointer types and ARRAY types. Procedure var parameters are correctly | |
4239 | printed and hexadecimal addresses and character constants are also | |
4240 | written in the Modula-2 syntax. Best results can be obtained by using | |
4241 | GNU Modula-2 together with the -gdwarf-2 command line option. | |
4242 | ||
acab6ab2 MM |
4243 | * REMOVED features |
4244 | ||
4245 | The ARM rdi-share module. | |
4246 | ||
f4267320 DJ |
4247 | The Netware NLM debug server. |
4248 | ||
53e5f3cf | 4249 | *** Changes in GDB 6.4 |
156a53ca | 4250 | |
e0ecbda1 MK |
4251 | * New native configurations |
4252 | ||
02a677ac | 4253 | OpenBSD/arm arm*-*-openbsd* |
e0ecbda1 MK |
4254 | OpenBSD/mips64 mips64-*-openbsd* |
4255 | ||
d64a6579 KB |
4256 | * New targets |
4257 | ||
4258 | Morpho Technologies ms1 ms1-elf | |
4259 | ||
b33a6190 AS |
4260 | * New command line options |
4261 | ||
4262 | --batch-silent As for --batch, but totally silent. | |
4263 | --return-child-result The debugger will exist with the same value | |
4264 | the child (debugged) program exited with. | |
4265 | --eval-command COMMAND, -ex COMMAND | |
4266 | Execute a single GDB CLI command. This may be | |
4267 | specified multiple times and in conjunction | |
4268 | with the --command (-x) option. | |
4269 | ||
11dced61 AC |
4270 | * Deprecated commands removed |
4271 | ||
4272 | The following commands, that were deprecated in 2000, have been | |
4273 | removed: | |
4274 | ||
4275 | Command Replacement | |
4276 | set|show arm disassembly-flavor set|show arm disassembler | |
4277 | othernames set arm disassembler | |
4278 | set|show remotedebug set|show debug remote | |
4279 | set|show archdebug set|show debug arch | |
4280 | set|show eventdebug set|show debug event | |
4281 | regs info registers | |
4282 | ||
6fe85783 MK |
4283 | * New BSD user-level threads support |
4284 | ||
4285 | It is now possible to debug programs using the user-level threads | |
4286 | library on OpenBSD and FreeBSD. Currently supported (target) | |
4287 | configurations are: | |
4288 | ||
4289 | FreeBSD/amd64 x86_64-*-freebsd* | |
4290 | FreeBSD/i386 i386-*-freebsd* | |
4291 | OpenBSD/i386 i386-*-openbsd* | |
4292 | ||
4293 | Note that the new kernel threads libraries introduced in FreeBSD 5.x | |
4294 | are not yet supported. | |
4295 | ||
5260ca71 MS |
4296 | * New support for Matsushita MN10300 w/sim added |
4297 | (Work in progress). mn10300-elf. | |
4298 | ||
e84ecc99 AC |
4299 | * REMOVED configurations and files |
4300 | ||
4301 | VxWorks and the XDR protocol *-*-vxworks | |
9445aa30 | 4302 | Motorola MCORE mcore-*-* |
9445aa30 | 4303 | National Semiconductor NS32000 ns32k-*-* |
156a53ca | 4304 | |
31e35378 JB |
4305 | * New "set print array-indexes" command |
4306 | ||
4307 | After turning this setting "on", GDB prints the index of each element | |
4308 | when displaying arrays. The default is "off" to preserve the previous | |
4309 | behavior. | |
4310 | ||
e85e5c83 MK |
4311 | * VAX floating point support |
4312 | ||
4313 | GDB now supports the not-quite-ieee VAX F and D floating point formats. | |
4314 | ||
d91e9901 AS |
4315 | * User-defined command support |
4316 | ||
4317 | In addition to using $arg0..$arg9 for argument passing, it is now possible | |
4318 | to use $argc to determine now many arguments have been passed. See the | |
4319 | section on user-defined commands in the user manual for more information. | |
4320 | ||
f2cb65ca MC |
4321 | *** Changes in GDB 6.3: |
4322 | ||
f47b1503 AS |
4323 | * New command line option |
4324 | ||
4325 | GDB now accepts -l followed by a number to set the timeout for remote | |
4326 | debugging. | |
4327 | ||
f2cb65ca MC |
4328 | * GDB works with GCC -feliminate-dwarf2-dups |
4329 | ||
4330 | GDB now supports a more compact representation of DWARF-2 debug | |
4331 | information using DW_FORM_ref_addr references. These are produced | |
4332 | by GCC with the option -feliminate-dwarf2-dups and also by some | |
4333 | proprietary compilers. With GCC, you must use GCC 3.3.4 or later | |
4334 | to use -feliminate-dwarf2-dups. | |
860660cb | 4335 | |
d08c0230 AC |
4336 | * Internationalization |
4337 | ||
4338 | When supported by the host system, GDB will be built with | |
4339 | internationalization (libintl). The task of marking up the sources is | |
4340 | continued, we're looking forward to our first translation. | |
4341 | ||
117ea3cf PH |
4342 | * Ada |
4343 | ||
4344 | Initial support for debugging programs compiled with the GNAT | |
4345 | implementation of the Ada programming language has been integrated | |
4346 | into GDB. In this release, support is limited to expression evaluation. | |
4347 | ||
d08c0230 AC |
4348 | * New native configurations |
4349 | ||
4350 | GNU/Linux/m32r m32r-*-linux-gnu | |
4351 | ||
4352 | * Remote 'p' packet | |
4353 | ||
4354 | GDB's remote protocol now includes support for the 'p' packet. This | |
4355 | packet is used to fetch individual registers from a remote inferior. | |
4356 | ||
4357 | * END-OF-LIFE registers[] compatibility module | |
4358 | ||
4359 | GDB's internal register infrastructure has been completely rewritten. | |
4360 | The new infrastructure making possible the implementation of key new | |
4361 | features including 32x64 (e.g., 64-bit amd64 GDB debugging a 32-bit | |
4362 | i386 application). | |
4363 | ||
4364 | GDB 6.3 will be the last release to include the the registers[] | |
4365 | compatibility module that allowed out-of-date configurations to | |
4366 | continue to work. This change directly impacts the following | |
4367 | configurations: | |
4368 | ||
4369 | hppa-*-hpux | |
4370 | ia64-*-aix | |
4371 | mips-*-irix* | |
4372 | *-*-lynx | |
4373 | mips-*-linux-gnu | |
4374 | sds protocol | |
4375 | xdr protocol | |
4376 | powerpc bdm protocol | |
4377 | ||
4378 | Unless there is activity to revive these configurations, they will be | |
4379 | made OBSOLETE in GDB 6.4, and REMOVED from GDB 6.5. | |
4380 | ||
4381 | * OBSOLETE configurations and files | |
4382 | ||
4383 | Configurations that have been declared obsolete in this release have | |
4384 | been commented out. Unless there is activity to revive these | |
4385 | configurations, the next release of GDB will have their sources | |
4386 | permanently REMOVED. | |
4387 | ||
4388 | h8300-*-* | |
4389 | mcore-*-* | |
4390 | mn10300-*-* | |
4391 | ns32k-*-* | |
4392 | sh64-*-* | |
4393 | v850-*-* | |
4394 | ||
ebb7c577 AC |
4395 | *** Changes in GDB 6.2.1: |
4396 | ||
4397 | * MIPS `break main; run' gave an heuristic-fence-post warning | |
4398 | ||
4399 | When attempting to run even a simple program, a warning about | |
4400 | heuristic-fence-post being hit would be reported. This problem has | |
4401 | been fixed. | |
4402 | ||
4403 | * MIPS IRIX 'long double' crashed GDB | |
4404 | ||
4405 | When examining a long double variable, GDB would get a segmentation | |
4406 | fault. The crash has been fixed (but GDB 6.2 cannot correctly examine | |
4407 | IRIX long double values). | |
4408 | ||
4409 | * VAX and "next" | |
4410 | ||
4411 | A bug in the VAX stack code was causing problems with the "next" | |
4412 | command. This problem has been fixed. | |
4413 | ||
860660cb | 4414 | *** Changes in GDB 6.2: |
faae5abe | 4415 | |
0dea2468 AC |
4416 | * Fix for ``many threads'' |
4417 | ||
4418 | On GNU/Linux systems that use the NPTL threads library, a program | |
4419 | rapidly creating and deleting threads would confuse GDB leading to the | |
4420 | error message: | |
4421 | ||
4422 | ptrace: No such process. | |
4423 | thread_db_get_info: cannot get thread info: generic error | |
4424 | ||
4425 | This problem has been fixed. | |
4426 | ||
2c07db7a AC |
4427 | * "-async" and "-noasync" options removed. |
4428 | ||
4429 | Support for the broken "-noasync" option has been removed (it caused | |
4430 | GDB to dump core). | |
4431 | ||
c23968a2 JB |
4432 | * New ``start'' command. |
4433 | ||
4434 | This command runs the program until the begining of the main procedure. | |
4435 | ||
71009278 MK |
4436 | * New BSD Kernel Data Access Library (libkvm) interface |
4437 | ||
4438 | Using ``target kvm'' it is now possible to debug kernel core dumps and | |
4439 | live kernel memory images on various FreeBSD, NetBSD and OpenBSD | |
4440 | platforms. Currently supported (native-only) configurations are: | |
4441 | ||
4442 | FreeBSD/amd64 x86_64-*-freebsd* | |
4443 | FreeBSD/i386 i?86-*-freebsd* | |
4444 | NetBSD/i386 i?86-*-netbsd* | |
4445 | NetBSD/m68k m68*-*-netbsd* | |
4446 | NetBSD/sparc sparc-*-netbsd* | |
4447 | OpenBSD/amd64 x86_64-*-openbsd* | |
4448 | OpenBSD/i386 i?86-*-openbsd* | |
4449 | OpenBSD/m68k m68*-openbsd* | |
4450 | OpenBSD/sparc sparc-*-openbsd* | |
4451 | ||
3c0b7db2 AC |
4452 | * Signal trampoline code overhauled |
4453 | ||
4454 | Many generic problems with GDB's signal handling code have been fixed. | |
4455 | These include: backtraces through non-contiguous stacks; recognition | |
4456 | of sa_sigaction signal trampolines; backtrace from a NULL pointer | |
4457 | call; backtrace through a signal trampoline; step into and out of | |
4458 | signal handlers; and single-stepping in the signal trampoline. | |
4459 | ||
73cc75f3 AC |
4460 | Please note that kernel bugs are a limiting factor here. These |
4461 | features have been shown to work on an s390 GNU/Linux system that | |
4462 | include a 2.6.8-rc1 kernel. Ref PR breakpoints/1702. | |
3c0b7db2 | 4463 | |
7243600a BF |
4464 | * Cygwin support for DWARF 2 added. |
4465 | ||
6f606e1c MK |
4466 | * New native configurations |
4467 | ||
97dc871c | 4468 | GNU/Linux/hppa hppa*-*-linux* |
0e56aeaf | 4469 | OpenBSD/hppa hppa*-*-openbsd* |
bf2ca189 MK |
4470 | OpenBSD/m68k m68*-*-openbsd* |
4471 | OpenBSD/m88k m88*-*-openbsd* | |
d195bc9f | 4472 | OpenBSD/powerpc powerpc-*-openbsd* |
6f606e1c | 4473 | NetBSD/vax vax-*-netbsd* |
9f076e7a | 4474 | OpenBSD/vax vax-*-openbsd* |
6f606e1c | 4475 | |
a1b461bf AC |
4476 | * END-OF-LIFE frame compatibility module |
4477 | ||
4478 | GDB's internal frame infrastructure has been completely rewritten. | |
4479 | The new infrastructure making it possible to support key new features | |
4480 | including DWARF 2 Call Frame Information. To aid in the task of | |
4481 | migrating old configurations to this new infrastructure, a | |
4482 | compatibility module, that allowed old configurations to continue to | |
4483 | work, was also included. | |
4484 | ||
4485 | GDB 6.2 will be the last release to include this frame compatibility | |
4486 | module. This change directly impacts the following configurations: | |
4487 | ||
4488 | h8300-*-* | |
4489 | mcore-*-* | |
4490 | mn10300-*-* | |
4491 | ns32k-*-* | |
4492 | sh64-*-* | |
4493 | v850-*-* | |
4494 | xstormy16-*-* | |
4495 | ||
4496 | Unless there is activity to revive these configurations, they will be | |
4497 | made OBSOLETE in GDB 6.3, and REMOVED from GDB 6.4. | |
4498 | ||
3c7012f5 AC |
4499 | * REMOVED configurations and files |
4500 | ||
4501 | Sun 3, running SunOS 3 m68*-*-sunos3* | |
4502 | Sun 3, running SunOS 4 m68*-*-sunos4* | |
4503 | Sun 2, running SunOS 3 m68000-*-sunos3* | |
4504 | Sun 2, running SunOS 4 m68000-*-sunos4* | |
4505 | Motorola 680x0 running LynxOS m68*-*-lynxos* | |
4506 | AT&T 3b1/Unix pc m68*-att-* | |
4507 | Bull DPX2 (68k, System V release 3) m68*-bull-sysv* | |
4508 | decstation mips-dec-* mips-little-* | |
4509 | riscos mips-*-riscos* mips-*-sysv* | |
4510 | sonymips mips-sony-* | |
4511 | sysv mips*-*-sysv4* (IRIX 5/6 not included) | |
4512 | ||
e5fe55f7 AC |
4513 | *** Changes in GDB 6.1.1: |
4514 | ||
4515 | * TUI (Text-mode User Interface) built-in (also included in GDB 6.1) | |
4516 | ||
4517 | The TUI (Text-mode User Interface) is now built as part of a default | |
4518 | GDB configuration. It is enabled by either selecting the TUI with the | |
4519 | command line option "-i=tui" or by running the separate "gdbtui" | |
4520 | program. For more information on the TUI, see the manual "Debugging | |
4521 | with GDB". | |
4522 | ||
4523 | * Pending breakpoint support (also included in GDB 6.1) | |
4524 | ||
4525 | Support has been added to allow you to specify breakpoints in shared | |
4526 | libraries that have not yet been loaded. If a breakpoint location | |
4527 | cannot be found, and the "breakpoint pending" option is set to auto, | |
4528 | GDB queries you if you wish to make the breakpoint pending on a future | |
4529 | shared-library load. If and when GDB resolves the breakpoint symbol, | |
4530 | the pending breakpoint is removed as one or more regular breakpoints | |
4531 | are created. | |
4532 | ||
4533 | Pending breakpoints are very useful for GCJ Java debugging. | |
4534 | ||
4535 | * Fixed ISO-C build problems | |
4536 | ||
4537 | The files bfd/elf-bfd.h, gdb/dictionary.c and gdb/types.c contained | |
4538 | non ISO-C code that stopped them being built using a more strict ISO-C | |
4539 | compiler (e.g., IBM's C compiler). | |
4540 | ||
4541 | * Fixed build problem on IRIX 5 | |
4542 | ||
4543 | Due to header problems with <sys/proc.h>, the file gdb/proc-api.c | |
4544 | wasn't able to compile compile on an IRIX 5 system. | |
4545 | ||
4546 | * Added execute permission to gdb/gdbserver/configure | |
4547 | ||
4548 | The shell script gdb/testsuite/gdb.stabs/configure lacked execute | |
4549 | permission. This bug would cause configure to fail on a number of | |
4550 | systems (Solaris, IRIX). Ref: server/519. | |
4551 | ||
4552 | * Fixed build problem on hpux2.0w-hp-hpux11.00 using the HP ANSI C compiler | |
4553 | ||
4554 | Older HPUX ANSI C compilers did not accept variable array sizes. somsolib.c | |
4555 | has been updated to use constant array sizes. | |
4556 | ||
4557 | * Fixed a panic in the DWARF Call Frame Info code on Solaris 2.7 | |
4558 | ||
4559 | GCC 3.3.2, on Solaris 2.7, includes the DW_EH_PE_funcrel encoding in | |
4560 | its generated DWARF Call Frame Info. This encoding was causing GDB to | |
4561 | panic, that panic has been fixed. Ref: gdb/1628. | |
4562 | ||
4563 | * Fixed a problem when examining parameters in shared library code. | |
4564 | ||
4565 | When examining parameters in optimized shared library code generated | |
4566 | by a mainline GCC, GDB would incorrectly report ``Variable "..." is | |
4567 | not available''. GDB now correctly displays the variable's value. | |
4568 | ||
faae5abe | 4569 | *** Changes in GDB 6.1: |
f2c06f52 | 4570 | |
9175c9a3 MC |
4571 | * Removed --with-mmalloc |
4572 | ||
4573 | Support for the mmalloc memory manager has been removed, as it | |
4574 | conflicted with the internal gdb byte cache. | |
4575 | ||
3cc87ec0 MK |
4576 | * Changes in AMD64 configurations |
4577 | ||
4578 | The AMD64 target now includes the %cs and %ss registers. As a result | |
4579 | the AMD64 remote protocol has changed; this affects the floating-point | |
4580 | and SSE registers. If you rely on those registers for your debugging, | |
4581 | you should upgrade gdbserver on the remote side. | |
4582 | ||
f0424ef6 MK |
4583 | * Revised SPARC target |
4584 | ||
4585 | The SPARC target has been completely revised, incorporating the | |
4586 | FreeBSD/sparc64 support that was added for GDB 6.0. As a result | |
03cebad2 MK |
4587 | support for LynxOS and SunOS 4 has been dropped. Calling functions |
4588 | from within GDB on operating systems with a non-executable stack | |
4589 | (Solaris, OpenBSD) now works. | |
f0424ef6 | 4590 | |
59659be2 ILT |
4591 | * New C++ demangler |
4592 | ||
4593 | GDB has a new C++ demangler which does a better job on the mangled | |
4594 | names generated by current versions of g++. It also runs faster, so | |
4595 | with this and other changes gdb should now start faster on large C++ | |
4596 | programs. | |
4597 | ||
9e08b29b DJ |
4598 | * DWARF 2 Location Expressions |
4599 | ||
4600 | GDB support for location expressions has been extended to support function | |
4601 | arguments and frame bases. Older versions of GDB could crash when they | |
4602 | encountered these. | |
4603 | ||
8dfe8985 DC |
4604 | * C++ nested types and namespaces |
4605 | ||
4606 | GDB's support for nested types and namespaces in C++ has been | |
4607 | improved, especially if you use the DWARF 2 debugging format. (This | |
4608 | is the default for recent versions of GCC on most platforms.) | |
4609 | Specifically, if you have a class "Inner" defined within a class or | |
4610 | namespace "Outer", then GDB realizes that the class's name is | |
4611 | "Outer::Inner", not simply "Inner". This should greatly reduce the | |
4612 | frequency of complaints about not finding RTTI symbols. In addition, | |
4613 | if you are stopped at inside of a function defined within a namespace, | |
4614 | GDB modifies its name lookup accordingly. | |
4615 | ||
cced5e27 MK |
4616 | * New native configurations |
4617 | ||
4618 | NetBSD/amd64 x86_64-*-netbsd* | |
27d1e716 | 4619 | OpenBSD/amd64 x86_64-*-openbsd* |
2031c21a | 4620 | OpenBSD/alpha alpha*-*-openbsd* |
f2cab569 MK |
4621 | OpenBSD/sparc sparc-*-openbsd* |
4622 | OpenBSD/sparc64 sparc64-*-openbsd* | |
cced5e27 | 4623 | |
b4b4b794 KI |
4624 | * New debugging protocols |
4625 | ||
4626 | M32R with SDI protocol m32r-*-elf* | |
4627 | ||
7989c619 AC |
4628 | * "set prompt-escape-char" command deleted. |
4629 | ||
4630 | The command "set prompt-escape-char" has been deleted. This command, | |
4631 | and its very obscure effet on GDB's prompt, was never documented, | |
4632 | tested, nor mentioned in the NEWS file. | |
4633 | ||
5994185b AC |
4634 | * OBSOLETE configurations and files |
4635 | ||
4636 | Configurations that have been declared obsolete in this release have | |
4637 | been commented out. Unless there is activity to revive these | |
4638 | configurations, the next release of GDB will have their sources | |
4639 | permanently REMOVED. | |
4640 | ||
4641 | Sun 3, running SunOS 3 m68*-*-sunos3* | |
4642 | Sun 3, running SunOS 4 m68*-*-sunos4* | |
4643 | Sun 2, running SunOS 3 m68000-*-sunos3* | |
4644 | Sun 2, running SunOS 4 m68000-*-sunos4* | |
4645 | Motorola 680x0 running LynxOS m68*-*-lynxos* | |
4646 | AT&T 3b1/Unix pc m68*-att-* | |
4647 | Bull DPX2 (68k, System V release 3) m68*-bull-sysv* | |
0748d941 AC |
4648 | decstation mips-dec-* mips-little-* |
4649 | riscos mips-*-riscos* mips-*-sysv* | |
4650 | sonymips mips-sony-* | |
4651 | sysv mips*-*-sysv4* (IRIX 5/6 not included) | |
5994185b | 4652 | |
0ddabb4c AC |
4653 | * REMOVED configurations and files |
4654 | ||
4655 | SGI Irix-4.x mips-sgi-irix4 or iris4 | |
4656 | SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris | |
4a8269c0 AC |
4657 | Z8000 simulator z8k-zilog-none or z8ksim |
4658 | Matsushita MN10200 w/simulator mn10200-*-* | |
4659 | H8/500 simulator h8500-hitachi-hms or h8500hms | |
4660 | HP/PA running BSD hppa*-*-bsd* | |
4661 | HP/PA running OSF/1 hppa*-*-osf* | |
4662 | HP/PA Pro target hppa*-*-pro* | |
4663 | PMAX (MIPS) running Mach 3.0 mips*-*-mach3* | |
cf7c5c23 | 4664 | 386BSD i[3456]86-*-bsd* |
4a8269c0 AC |
4665 | Sequent family i[3456]86-sequent-sysv4* |
4666 | i[3456]86-sequent-sysv* | |
4667 | i[3456]86-sequent-bsd* | |
f0424ef6 MK |
4668 | SPARC running LynxOS sparc-*-lynxos* |
4669 | SPARC running SunOS 4 sparc-*-sunos4* | |
4a8269c0 AC |
4670 | Tsqware Sparclet sparclet-*-* |
4671 | Fujitsu SPARClite sparclite-fujitsu-none or sparclite | |
0ddabb4c | 4672 | |
c7f1390e DJ |
4673 | *** Changes in GDB 6.0: |
4674 | ||
1fe43d45 AC |
4675 | * Objective-C |
4676 | ||
4677 | Support for debugging the Objective-C programming language has been | |
4678 | integrated into GDB. | |
4679 | ||
e6beb428 AC |
4680 | * New backtrace mechanism (includes DWARF 2 Call Frame Information). |
4681 | ||
4682 | DWARF 2's Call Frame Information makes available compiler generated | |
4683 | information that more exactly describes the program's run-time stack. | |
4684 | By using this information, GDB is able to provide more robust stack | |
4685 | backtraces. | |
4686 | ||
4687 | The i386, amd64 (nee, x86-64), Alpha, m68hc11, ia64, and m32r targets | |
4688 | have been updated to use a new backtrace mechanism which includes | |
4689 | DWARF 2 CFI support. | |
4690 | ||
4691 | * Hosted file I/O. | |
4692 | ||
4693 | GDB's remote protocol has been extended to include support for hosted | |
4694 | file I/O (where the remote target uses GDB's file system). See GDB's | |
4695 | remote protocol documentation for details. | |
4696 | ||
4697 | * All targets using the new architecture framework. | |
4698 | ||
4699 | All of GDB's targets have been updated to use the new internal | |
4700 | architecture framework. The way is now open for future GDB releases | |
4701 | to include cross-architecture native debugging support (i386 on amd64, | |
4702 | ppc32 on ppc64). | |
4703 | ||
4704 | * GNU/Linux's Thread Local Storage (TLS) | |
4705 | ||
4706 | GDB now includes support for for the GNU/Linux implementation of | |
4707 | per-thread variables. | |
4708 | ||
4709 | * GNU/Linux's Native POSIX Thread Library (NPTL) | |
4710 | ||
4711 | GDB's thread code has been updated to work with either the new | |
4712 | GNU/Linux NPTL thread library or the older "LinuxThreads" library. | |
4713 | ||
4714 | * Separate debug info. | |
4715 | ||
4716 | GDB, in conjunction with BINUTILS, now supports a mechanism for | |
4717 | automatically loading debug information from a separate file. Instead | |
4718 | of shipping full debug and non-debug versions of system libraries, | |
4719 | system integrators can now instead ship just the stripped libraries | |
4720 | and optional debug files. | |
4721 | ||
4722 | * DWARF 2 Location Expressions | |
4723 | ||
4724 | DWARF 2 Location Expressions allow the compiler to more completely | |
4725 | describe the location of variables (even in optimized code) to the | |
4726 | debugger. | |
4727 | ||
4728 | GDB now includes preliminary support for location expressions (support | |
4729 | for DW_OP_piece is still missing). | |
4730 | ||
4731 | * Java | |
4732 | ||
4733 | A number of long standing bugs that caused GDB to die while starting a | |
4734 | Java application have been fixed. GDB's Java support is now | |
4735 | considered "useable". | |
4736 | ||
85f8f974 DJ |
4737 | * GNU/Linux support for fork, vfork, and exec. |
4738 | ||
4739 | The "catch fork", "catch exec", "catch vfork", and "set follow-fork-mode" | |
4740 | commands are now implemented for GNU/Linux. They require a 2.5.x or later | |
4741 | kernel. | |
4742 | ||
0fac0b41 DJ |
4743 | * GDB supports logging output to a file |
4744 | ||
4745 | There are two new commands, "set logging" and "show logging", which can be | |
4746 | used to capture GDB's output to a file. | |
f2c06f52 | 4747 | |
6ad8ae5c DJ |
4748 | * The meaning of "detach" has changed for gdbserver |
4749 | ||
4750 | The "detach" command will now resume the application, as documented. To | |
4751 | disconnect from gdbserver and leave it stopped, use the new "disconnect" | |
4752 | command. | |
4753 | ||
e286caf2 | 4754 | * d10v, m68hc11 `regs' command deprecated |
5f601589 AC |
4755 | |
4756 | The `info registers' command has been updated so that it displays the | |
4757 | registers using a format identical to the old `regs' command. | |
4758 | ||
d28f9cdf DJ |
4759 | * Profiling support |
4760 | ||
4761 | A new command, "maint set profile on/off", has been added. This command can | |
4762 | be used to enable or disable profiling while running GDB, to profile a | |
4763 | session or a set of commands. In addition there is a new configure switch, | |
4764 | "--enable-profiling", which will cause GDB to be compiled with profiling | |
4765 | data, for more informative profiling results. | |
4766 | ||
da0f9dcd AC |
4767 | * Default MI syntax changed to "mi2". |
4768 | ||
4769 | The default MI (machine interface) syntax, enabled by the command line | |
4770 | option "-i=mi", has been changed to "mi2". The previous MI syntax, | |
b68767c1 | 4771 | "mi1", can be enabled by specifying the option "-i=mi1". |
da0f9dcd AC |
4772 | |
4773 | Support for the original "mi0" syntax (included in GDB 5.0) has been | |
4774 | removed. | |
4775 | ||
fb9b6b35 JJ |
4776 | Fix for gdb/192: removed extraneous space when displaying frame level. |
4777 | Fix for gdb/672: update changelist is now output in mi list format. | |
4778 | Fix for gdb/702: a -var-assign that updates the value now shows up | |
4779 | in a subsequent -var-update. | |
4780 | ||
954a4db8 MK |
4781 | * New native configurations. |
4782 | ||
4783 | FreeBSD/amd64 x86_64-*-freebsd* | |
4784 | ||
6760f9e6 JB |
4785 | * Multi-arched targets. |
4786 | ||
b4263afa | 4787 | HP/PA HPUX11 hppa*-*-hpux* |
85a453d5 | 4788 | Renesas M32R/D w/simulator m32r-*-elf* |
6760f9e6 | 4789 | |
1b831c93 AC |
4790 | * OBSOLETE configurations and files |
4791 | ||
4792 | Configurations that have been declared obsolete in this release have | |
4793 | been commented out. Unless there is activity to revive these | |
4794 | configurations, the next release of GDB will have their sources | |
4795 | permanently REMOVED. | |
4796 | ||
8b0e5691 | 4797 | Z8000 simulator z8k-zilog-none or z8ksim |
67f16606 | 4798 | Matsushita MN10200 w/simulator mn10200-*-* |
fd2299bd | 4799 | H8/500 simulator h8500-hitachi-hms or h8500hms |
56056df7 AC |
4800 | HP/PA running BSD hppa*-*-bsd* |
4801 | HP/PA running OSF/1 hppa*-*-osf* | |
4802 | HP/PA Pro target hppa*-*-pro* | |
78c43945 | 4803 | PMAX (MIPS) running Mach 3.0 mips*-*-mach3* |
2fbce691 AC |
4804 | Sequent family i[3456]86-sequent-sysv4* |
4805 | i[3456]86-sequent-sysv* | |
4806 | i[3456]86-sequent-bsd* | |
f81824a9 AC |
4807 | Tsqware Sparclet sparclet-*-* |
4808 | Fujitsu SPARClite sparclite-fujitsu-none or sparclite | |
fd2299bd | 4809 | |
5835abe7 NC |
4810 | * REMOVED configurations and files |
4811 | ||
4812 | V850EA ISA | |
1b831c93 AC |
4813 | Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88 |
4814 | IBM AIX PS/2 i[3456]86-*-aix | |
4815 | i386 running Mach 3.0 i[3456]86-*-mach3* | |
4816 | i386 running Mach i[3456]86-*-mach* | |
4817 | i386 running OSF/1 i[3456]86-*osf1mk* | |
4818 | HP/Apollo 68k Family m68*-apollo*-sysv*, | |
4819 | m68*-apollo*-bsd*, | |
4820 | m68*-hp-bsd*, m68*-hp-hpux* | |
4821 | Argonaut Risc Chip (ARC) arc-*-* | |
4822 | Mitsubishi D30V d30v-*-* | |
4823 | Fujitsu FR30 fr30-*-elf* | |
4824 | OS/9000 i[34]86-*-os9k | |
4825 | I960 with MON960 i960-*-coff | |
5835abe7 | 4826 | |
a094c6fb AC |
4827 | * MIPS $fp behavior changed |
4828 | ||
4829 | The convenience variable $fp, for the MIPS, now consistently returns | |
4830 | the address of the current frame's base. Previously, depending on the | |
4831 | context, $fp could refer to either $sp or the current frame's base | |
4832 | address. See ``8.10 Registers'' in the manual ``Debugging with GDB: | |
4833 | The GNU Source-Level Debugger''. | |
4834 | ||
299ffc64 | 4835 | *** Changes in GDB 5.3: |
37057839 | 4836 | |
46248966 AC |
4837 | * GNU/Linux shared library multi-threaded performance improved. |
4838 | ||
4839 | When debugging a multi-threaded application on GNU/Linux, GDB now uses | |
4840 | `/proc', in preference to `ptrace' for memory reads. This may result | |
4841 | in an improvement in the start-up time of multi-threaded, shared | |
4842 | library applications when run under GDB. One GDB user writes: ``loads | |
4843 | shared libs like mad''. | |
4844 | ||
b9d14705 | 4845 | * ``gdbserver'' now supports multi-threaded applications on some targets |
6da02953 | 4846 | |
b9d14705 DJ |
4847 | Support for debugging multi-threaded applications which use |
4848 | the GNU/Linux LinuxThreads package has been added for | |
4849 | arm*-*-linux*-gnu*, i[3456]86-*-linux*-gnu*, mips*-*-linux*-gnu*, | |
4850 | powerpc*-*-linux*-gnu*, and sh*-*-linux*-gnu*. | |
6da02953 | 4851 | |
e0e9281e JB |
4852 | * GDB now supports C/C++ preprocessor macros. |
4853 | ||
4854 | GDB now expands preprocessor macro invocations in C/C++ expressions, | |
4855 | and provides various commands for showing macro definitions and how | |
4856 | they expand. | |
4857 | ||
dd73b9bb AC |
4858 | The new command `macro expand EXPRESSION' expands any macro |
4859 | invocations in expression, and shows the result. | |
4860 | ||
4861 | The new command `show macro MACRO-NAME' shows the definition of the | |
4862 | macro named MACRO-NAME, and where it was defined. | |
4863 | ||
e0e9281e JB |
4864 | Most compilers don't include information about macros in the debugging |
4865 | information by default. In GCC 3.1, for example, you need to compile | |
4866 | your program with the options `-gdwarf-2 -g3'. If the macro | |
4867 | information is present in the executable, GDB will read it. | |
4868 | ||
2250ee0c CV |
4869 | * Multi-arched targets. |
4870 | ||
6e3ba3b8 JT |
4871 | DEC Alpha (partial) alpha*-*-* |
4872 | DEC VAX (partial) vax-*-* | |
2250ee0c | 4873 | NEC V850 v850-*-* |
6e3ba3b8 | 4874 | National Semiconductor NS32000 (partial) ns32k-*-* |
a1789893 GS |
4875 | Motorola 68000 (partial) m68k-*-* |
4876 | Motorola MCORE mcore-*-* | |
2250ee0c | 4877 | |
cd9bfe15 | 4878 | * New targets. |
e33ce519 | 4879 | |
456f8b9d DB |
4880 | Fujitsu FRV architecture added by Red Hat frv*-*-* |
4881 | ||
e33ce519 | 4882 | |
da8ca43d JT |
4883 | * New native configurations |
4884 | ||
4885 | Alpha NetBSD alpha*-*-netbsd* | |
029923d4 | 4886 | SH NetBSD sh*-*-netbsdelf* |
45888261 | 4887 | MIPS NetBSD mips*-*-netbsd* |
9ce5c36a | 4888 | UltraSPARC NetBSD sparc64-*-netbsd* |
da8ca43d | 4889 | |
cd9bfe15 AC |
4890 | * OBSOLETE configurations and files |
4891 | ||
4892 | Configurations that have been declared obsolete in this release have | |
4893 | been commented out. Unless there is activity to revive these | |
4894 | configurations, the next release of GDB will have their sources | |
4895 | permanently REMOVED. | |
4896 | ||
92eb23c5 | 4897 | Mitsubishi D30V d30v-*-* |
a99a9e1b | 4898 | OS/9000 i[34]86-*-os9k |
1c7cc583 | 4899 | IBM AIX PS/2 i[3456]86-*-aix |
7a3085c1 | 4900 | Fujitsu FR30 fr30-*-elf* |
7fb623f7 | 4901 | Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88 |
eb4c54a2 | 4902 | Argonaut Risc Chip (ARC) arc-*-* |
d8ee244c MK |
4903 | i386 running Mach 3.0 i[3456]86-*-mach3* |
4904 | i386 running Mach i[3456]86-*-mach* | |
4905 | i386 running OSF/1 i[3456]86-*osf1mk* | |
822e978b AC |
4906 | HP/Apollo 68k Family m68*-apollo*-sysv*, |
4907 | m68*-apollo*-bsd*, | |
4908 | m68*-hp-bsd*, m68*-hp-hpux* | |
4d210288 | 4909 | I960 with MON960 i960-*-coff |
92eb23c5 | 4910 | |
db034ac5 AC |
4911 | * OBSOLETE languages |
4912 | ||
4913 | CHILL, a Pascal like language used by telecommunications companies. | |
4914 | ||
cd9bfe15 AC |
4915 | * REMOVED configurations and files |
4916 | ||
4917 | AMD 29k family via UDI a29k-amd-udi, udi29k | |
4918 | A29K VxWorks a29k-*-vxworks | |
4919 | AMD 29000 embedded, using EBMON a29k-none-none | |
4920 | AMD 29000 embedded with COFF a29k-none-coff | |
4921 | AMD 29000 embedded with a.out a29k-none-aout | |
4922 | ||
4923 | testsuite/gdb.hp/gdb.threads-hp/ directory | |
4924 | ||
20f01a46 DH |
4925 | * New command "set max-user-call-depth <nnn>" |
4926 | ||
4927 | This command allows the user to limit the call depth of user-defined | |
4928 | commands. The default is 1024. | |
4929 | ||
a5941fbf MK |
4930 | * Changes in FreeBSD/i386 native debugging. |
4931 | ||
4932 | Support for the "generate-core-file" has been added. | |
4933 | ||
89743e04 MS |
4934 | * New commands "dump", "append", and "restore". |
4935 | ||
4936 | These commands allow data to be copied from target memory | |
4937 | to a bfd-format or binary file (dump and append), and back | |
4938 | from a file into memory (restore). | |
37057839 | 4939 | |
9fb14e79 JB |
4940 | * Improved "next/step" support on multi-processor Alpha Tru64. |
4941 | ||
4942 | The previous single-step mechanism could cause unpredictable problems, | |
4943 | including the random appearance of SIGSEGV or SIGTRAP signals. The use | |
4944 | of a software single-step mechanism prevents this. | |
4945 | ||
2037aebb AC |
4946 | *** Changes in GDB 5.2.1: |
4947 | ||
4948 | * New targets. | |
4949 | ||
4950 | Atmel AVR avr*-*-* | |
4951 | ||
4952 | * Bug fixes | |
4953 | ||
4954 | gdb/182: gdb/323: gdb/237: On alpha, gdb was reporting: | |
4955 | mdebugread.c:2443: gdb-internal-error: sect_index_data not initialized | |
4956 | Fix, by Joel Brobecker imported from mainline. | |
4957 | ||
4958 | gdb/439: gdb/291: On some ELF object files, gdb was reporting: | |
4959 | dwarf2read.c:1072: gdb-internal-error: sect_index_text not initialize | |
4960 | Fix, by Fred Fish, imported from mainline. | |
4961 | ||
4962 | Dwarf2 .debug_frame & .eh_frame handler improved in many ways. | |
4963 | Surprisingly enough, it works now. | |
4964 | By Michal Ludvig, imported from mainline. | |
4965 | ||
4966 | i386 hardware watchpoint support: | |
4967 | avoid misses on second run for some targets. | |
4968 | By Pierre Muller, imported from mainline. | |
4969 | ||
37057839 | 4970 | *** Changes in GDB 5.2: |
eb7cedd9 | 4971 | |
1a703748 MS |
4972 | * New command "set trust-readonly-sections on[off]". |
4973 | ||
4974 | This command is a hint that tells gdb that read-only sections | |
4975 | really are read-only (ie. that their contents will not change). | |
4976 | In this mode, gdb will go to the object file rather than the | |
4977 | target to read memory from read-only sections (such as ".text"). | |
4978 | This can be a significant performance improvement on some | |
4979 | (notably embedded) targets. | |
4980 | ||
cefd4ef5 MS |
4981 | * New command "generate-core-file" (or "gcore"). |
4982 | ||
55241689 AC |
4983 | This new gdb command allows the user to drop a core file of the child |
4984 | process state at any time. So far it's been implemented only for | |
4985 | GNU/Linux and Solaris, but should be relatively easily ported to other | |
4986 | hosts. Argument is core file name (defaults to core.<pid>). | |
cefd4ef5 | 4987 | |
352ed7b4 MS |
4988 | * New command line option |
4989 | ||
4990 | GDB now accepts --pid or -p followed by a process id. | |
4991 | ||
4992 | * Change in command line behavior -- corefiles vs. process ids. | |
4993 | ||
4994 | There is a subtle behavior in the way in which GDB handles | |
4995 | command line arguments. The first non-flag argument is always | |
4996 | a program to debug, but the second non-flag argument may either | |
4997 | be a corefile or a process id. Previously, GDB would attempt to | |
4998 | open the second argument as a corefile, and if that failed, would | |
4999 | issue a superfluous error message and then attempt to attach it as | |
5000 | a process. Now, if the second argument begins with a non-digit, | |
5001 | it will be treated as a corefile. If it begins with a digit, | |
5002 | GDB will attempt to attach it as a process, and if no such process | |
5003 | is found, will then attempt to open it as a corefile. | |
5004 | ||
fe419ffc RE |
5005 | * Changes in ARM configurations. |
5006 | ||
5007 | Multi-arch support is enabled for all ARM configurations. The ARM/NetBSD | |
5008 | configuration is fully multi-arch. | |
5009 | ||
eb7cedd9 MK |
5010 | * New native configurations |
5011 | ||
fe419ffc | 5012 | ARM NetBSD arm*-*-netbsd* |
eb7cedd9 | 5013 | x86 OpenBSD i[3456]86-*-openbsd* |
55241689 | 5014 | AMD x86-64 running GNU/Linux x86_64-*-linux-* |
768f0842 | 5015 | Sparc64 running FreeBSD sparc64-*-freebsd* |
eb7cedd9 | 5016 | |
c9f63e6b CV |
5017 | * New targets |
5018 | ||
5019 | Sanyo XStormy16 xstormy16-elf | |
5020 | ||
9b4ff276 AC |
5021 | * OBSOLETE configurations and files |
5022 | ||
5023 | Configurations that have been declared obsolete in this release have | |
5024 | been commented out. Unless there is activity to revive these | |
5025 | configurations, the next release of GDB will have their sources | |
5026 | permanently REMOVED. | |
5027 | ||
5028 | AMD 29k family via UDI a29k-amd-udi, udi29k | |
5029 | A29K VxWorks a29k-*-vxworks | |
5030 | AMD 29000 embedded, using EBMON a29k-none-none | |
5031 | AMD 29000 embedded with COFF a29k-none-coff | |
5032 | AMD 29000 embedded with a.out a29k-none-aout | |
5033 | ||
b4ceaee6 | 5034 | testsuite/gdb.hp/gdb.threads-hp/ directory |
9b4ff276 | 5035 | |
e2caac18 AC |
5036 | * REMOVED configurations and files |
5037 | ||
5038 | TI TMS320C80 tic80-*-* | |
7bc65f05 | 5039 | WDC 65816 w65-*-* |
7768dd6c AC |
5040 | PowerPC Solaris powerpcle-*-solaris* |
5041 | PowerPC Windows NT powerpcle-*-cygwin32 | |
5042 | PowerPC Netware powerpc-*-netware* | |
5e734e1f | 5043 | Harris/CXUX m88k m88*-harris-cxux* |
1406caf7 AC |
5044 | Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-* |
5045 | ns32k-utek-sysv* ns32k-utek-* | |
7e24f0b1 | 5046 | SunOS 4.0.Xi on i386 i[3456]86-*-sunos* |
9b567150 | 5047 | Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern* |
3680c638 AC |
5048 | Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news |
5049 | ISI Optimum V (3.05) under 4.3bsd. m68*-isi-* | |
a752853e | 5050 | Apple Macintosh (MPW) host and target N/A host, powerpc-*-macos* |
e2caac18 | 5051 | |
c2a727fa TT |
5052 | * Changes to command line processing |
5053 | ||
5054 | The new `--args' feature can be used to specify command-line arguments | |
5055 | for the inferior from gdb's command line. | |
5056 | ||
467d8519 TT |
5057 | * Changes to key bindings |
5058 | ||
5059 | There is a new `operate-and-get-next' function bound to `C-o'. | |
5060 | ||
7072a954 AC |
5061 | *** Changes in GDB 5.1.1 |
5062 | ||
5063 | Fix compile problem on DJGPP. | |
5064 | ||
5065 | Fix a problem with floating-point registers on the i386 being | |
5066 | corrupted. | |
5067 | ||
5068 | Fix to stop GDB crashing on .debug_str debug info. | |
5069 | ||
5070 | Numerous documentation fixes. | |
5071 | ||
5072 | Numerous testsuite fixes. | |
5073 | ||
34f47bc4 | 5074 | *** Changes in GDB 5.1: |
139760b7 MK |
5075 | |
5076 | * New native configurations | |
5077 | ||
5078 | Alpha FreeBSD alpha*-*-freebsd* | |
5079 | x86 FreeBSD 3.x and 4.x i[3456]86*-freebsd[34]* | |
55241689 | 5080 | MIPS GNU/Linux mips*-*-linux* |
e23194cb EZ |
5081 | MIPS SGI Irix 6.x mips*-sgi-irix6* |
5082 | ia64 AIX ia64-*-aix* | |
55241689 | 5083 | s390 and s390x GNU/Linux {s390,s390x}-*-linux* |
139760b7 | 5084 | |
bf64bfd6 AC |
5085 | * New targets |
5086 | ||
def90278 | 5087 | Motorola 68HC11 and 68HC12 m68hc11-elf |
24be5c34 | 5088 | CRIS cris-axis |
55241689 | 5089 | UltraSparc running GNU/Linux sparc64-*-linux* |
def90278 | 5090 | |
17e78a56 | 5091 | * OBSOLETE configurations and files |
bf64bfd6 AC |
5092 | |
5093 | x86 FreeBSD before 2.2 i[3456]86*-freebsd{1,2.[01]}*, | |
9b9c068d | 5094 | Harris/CXUX m88k m88*-harris-cxux* |
bb19ff3b AC |
5095 | Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-* |
5096 | ns32k-utek-sysv* ns32k-utek-* | |
76f4ea53 AC |
5097 | TI TMS320C80 tic80-*-* |
5098 | WDC 65816 w65-*-* | |
4a1968f4 | 5099 | Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern* |
1b2b2c16 AC |
5100 | PowerPC Solaris powerpcle-*-solaris* |
5101 | PowerPC Windows NT powerpcle-*-cygwin32 | |
5102 | PowerPC Netware powerpc-*-netware* | |
24f89b68 | 5103 | SunOS 4.0.Xi on i386 i[3456]86-*-sunos* |
514e603d AC |
5104 | Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news |
5105 | ISI Optimum V (3.05) under 4.3bsd. m68*-isi-* | |
d036b4d9 | 5106 | Apple Macintosh (MPW) host N/A |
bf64bfd6 | 5107 | |
17e78a56 AC |
5108 | stuff.c (Program to stuff files into a specially prepared space in kdb) |
5109 | kdb-start.c (Main loop for the standalone kernel debugger) | |
5110 | ||
7fcca85b AC |
5111 | Configurations that have been declared obsolete in this release have |
5112 | been commented out. Unless there is activity to revive these | |
5113 | configurations, the next release of GDB will have their sources | |
5114 | permanently REMOVED. | |
5115 | ||
a196c81c | 5116 | * REMOVED configurations and files |
7fcca85b AC |
5117 | |
5118 | Altos 3068 m68*-altos-* | |
5119 | Convex c1-*-*, c2-*-* | |
5120 | Pyramid pyramid-*-* | |
5121 | ARM RISCix arm-*-* (as host) | |
5122 | Tahoe tahoe-*-* | |
a196c81c | 5123 | ser-ocd.c *-*-* |
bf64bfd6 | 5124 | |
6d6b80e5 | 5125 | * GDB has been converted to ISO C. |
e23194cb | 5126 | |
6d6b80e5 | 5127 | GDB's source code has been converted to ISO C. In particular, the |
e23194cb EZ |
5128 | sources are fully protoized, and rely on standard headers being |
5129 | present. | |
5130 | ||
bf64bfd6 AC |
5131 | * Other news: |
5132 | ||
e23194cb EZ |
5133 | * "info symbol" works on platforms which use COFF, ECOFF, XCOFF, and NLM. |
5134 | ||
5135 | * The MI enabled by default. | |
5136 | ||
5137 | The new machine oriented interface (MI) introduced in GDB 5.0 has been | |
5138 | revised and enabled by default. Packages which use GDB as a debugging | |
5139 | engine behind a UI or another front end are encouraged to switch to | |
5140 | using the GDB/MI interface, instead of the old annotations interface | |
5141 | which is now deprecated. | |
5142 | ||
5143 | * Support for debugging Pascal programs. | |
5144 | ||
5145 | GDB now includes support for debugging Pascal programs. The following | |
5146 | main features are supported: | |
5147 | ||
5148 | - Pascal-specific data types such as sets; | |
5149 | ||
5150 | - automatic recognition of Pascal sources based on file-name | |
5151 | extension; | |
5152 | ||
5153 | - Pascal-style display of data types, variables, and functions; | |
5154 | ||
5155 | - a Pascal expression parser. | |
5156 | ||
5157 | However, some important features are not yet supported. | |
5158 | ||
5159 | - Pascal string operations are not supported at all; | |
5160 | ||
5161 | - there are some problems with boolean types; | |
5162 | ||
5163 | - Pascal type hexadecimal constants are not supported | |
5164 | because they conflict with the internal variables format; | |
5165 | ||
5166 | - support for Pascal objects and classes is not full yet; | |
5167 | ||
5168 | - unlike Pascal, GDB is case-sensitive for symbol names. | |
5169 | ||
5170 | * Changes in completion. | |
5171 | ||
5172 | Commands such as `shell', `run' and `set args', which pass arguments | |
5173 | to inferior programs, now complete on file names, similar to what | |
5174 | users expect at the shell prompt. | |
5175 | ||
5176 | Commands which accept locations, such as `disassemble', `print', | |
5177 | `breakpoint', `until', etc. now complete on filenames as well as | |
5178 | program symbols. Thus, if you type "break foob TAB", and the source | |
5179 | files linked into the programs include `foobar.c', that file name will | |
5180 | be one of the candidates for completion. However, file names are not | |
5181 | considered for completion after you typed a colon that delimits a file | |
5182 | name from a name of a function in that file, as in "break foo.c:bar". | |
5183 | ||
5184 | `set demangle-style' completes on available demangling styles. | |
5185 | ||
5186 | * New platform-independent commands: | |
5187 | ||
5188 | It is now possible to define a post-hook for a command as well as a | |
5189 | hook that runs before the command. For more details, see the | |
5190 | documentation of `hookpost' in the GDB manual. | |
5191 | ||
5192 | * Changes in GNU/Linux native debugging. | |
5193 | ||
d7275149 MK |
5194 | Support for debugging multi-threaded programs has been completely |
5195 | revised for all platforms except m68k and sparc. You can now debug as | |
5196 | many threads as your system allows you to have. | |
5197 | ||
e23194cb EZ |
5198 | Attach/detach is supported for multi-threaded programs. |
5199 | ||
d7275149 MK |
5200 | Support for SSE registers was added for x86. This doesn't work for |
5201 | multi-threaded programs though. | |
e23194cb EZ |
5202 | |
5203 | * Changes in MIPS configurations. | |
bf64bfd6 AC |
5204 | |
5205 | Multi-arch support is enabled for all MIPS configurations. | |
5206 | ||
e23194cb EZ |
5207 | GDB can now be built as native debugger on SGI Irix 6.x systems for |
5208 | debugging n32 executables. (Debugging 64-bit executables is not yet | |
5209 | supported.) | |
5210 | ||
5211 | * Unified support for hardware watchpoints in all x86 configurations. | |
5212 | ||
5213 | Most (if not all) native x86 configurations support hardware-assisted | |
5214 | breakpoints and watchpoints in a unified manner. This support | |
5215 | implements debug register sharing between watchpoints, which allows to | |
5216 | put a virtually infinite number of watchpoints on the same address, | |
5217 | and also supports watching regions up to 16 bytes with several debug | |
5218 | registers. | |
5219 | ||
5220 | The new maintenance command `maintenance show-debug-regs' toggles | |
5221 | debugging print-outs in functions that insert, remove, and test | |
5222 | watchpoints and hardware breakpoints. | |
5223 | ||
5224 | * Changes in the DJGPP native configuration. | |
5225 | ||
5226 | New command ``info dos sysinfo'' displays assorted information about | |
5227 | the CPU, OS, memory, and DPMI server. | |
5228 | ||
5229 | New commands ``info dos gdt'', ``info dos ldt'', and ``info dos idt'' | |
5230 | display information about segment descriptors stored in GDT, LDT, and | |
5231 | IDT. | |
5232 | ||
5233 | New commands ``info dos pde'' and ``info dos pte'' display entries | |
5234 | from Page Directory and Page Tables (for now works with CWSDPMI only). | |
5235 | New command ``info dos address-pte'' displays the Page Table entry for | |
5236 | a given linear address. | |
5237 | ||
5238 | GDB can now pass command lines longer than 126 characters to the | |
5239 | program being debugged (requires an update to the libdbg.a library | |
5240 | which is part of the DJGPP development kit). | |
5241 | ||
5242 | DWARF2 debug info is now supported. | |
5243 | ||
6c56c069 EZ |
5244 | It is now possible to `step' and `next' through calls to `longjmp'. |
5245 | ||
e23194cb EZ |
5246 | * Changes in documentation. |
5247 | ||
5248 | All GDB documentation was converted to GFDL, the GNU Free | |
5249 | Documentation License. | |
5250 | ||
5251 | Tracepoints-related commands are now fully documented in the GDB | |
5252 | manual. | |
5253 | ||
5254 | TUI, the Text-mode User Interface, is now documented in the manual. | |
5255 | ||
5256 | Tracepoints-related commands are now fully documented in the GDB | |
5257 | manual. | |
5258 | ||
5259 | The "GDB Internals" manual now has an index. It also includes | |
5260 | documentation of `ui_out' functions, GDB coding standards, x86 | |
5261 | hardware watchpoints, and memory region attributes. | |
5262 | ||
5d6640b1 AC |
5263 | * GDB's version number moved to ``version.in'' |
5264 | ||
5265 | The Makefile variable VERSION has been replaced by the file | |
5266 | ``version.in''. People creating GDB distributions should update the | |
5267 | contents of this file. | |
5268 | ||
1a1d8446 AC |
5269 | * gdba.el deleted |
5270 | ||
5271 | GUD support is now a standard part of the EMACS distribution. | |
139760b7 | 5272 | |
9debab2f | 5273 | *** Changes in GDB 5.0: |
7a292a7a | 5274 | |
c63ce875 EZ |
5275 | * Improved support for debugging FP programs on x86 targets |
5276 | ||
5277 | Unified and much-improved support for debugging floating-point | |
5278 | programs on all x86 targets. In particular, ``info float'' now | |
5279 | displays the FP registers in the same format on all x86 targets, with | |
5280 | greater level of detail. | |
5281 | ||
5282 | * Improvements and bugfixes in hardware-assisted watchpoints | |
5283 | ||
5284 | It is now possible to watch array elements, struct members, and | |
5285 | bitfields with hardware-assisted watchpoints. Data-read watchpoints | |
5286 | on x86 targets no longer erroneously trigger when the address is | |
5287 | written. | |
5288 | ||
5289 | * Improvements in the native DJGPP version of GDB | |
5290 | ||
5291 | The distribution now includes all the scripts and auxiliary files | |
5292 | necessary to build the native DJGPP version on MS-DOS/MS-Windows | |
5293 | machines ``out of the box''. | |
5294 | ||
5295 | The DJGPP version can now debug programs that use signals. It is | |
5296 | possible to catch signals that happened in the debuggee, deliver | |
5297 | signals to it, interrupt it with Ctrl-C, etc. (Previously, a signal | |
5298 | would kill the program being debugged.) Programs that hook hardware | |
5299 | interrupts (keyboard, timer, etc.) can also be debugged. | |
5300 | ||
5301 | It is now possible to debug DJGPP programs that redirect their | |
5302 | standard handles or switch them to raw (as opposed to cooked) mode, or | |
5303 | even close them. The command ``run < foo > bar'' works as expected, | |
5304 | and ``info terminal'' reports useful information about the debuggee's | |
5305 | terminal, including raw/cooked mode, redirection, etc. | |
5306 | ||
5307 | The DJGPP version now uses termios functions for console I/O, which | |
5308 | enables debugging graphics programs. Interrupting GDB with Ctrl-C | |
5309 | also works. | |
5310 | ||
5311 | DOS-style file names with drive letters are now fully supported by | |
5312 | GDB. | |
5313 | ||
5314 | It is now possible to debug DJGPP programs that switch their working | |
5315 | directory. It is also possible to rerun the debuggee any number of | |
5316 | times without restarting GDB; thus, you can use the same setup, | |
5317 | breakpoints, etc. for many debugging sessions. | |
5318 | ||
ed9a39eb JM |
5319 | * New native configurations |
5320 | ||
5321 | ARM GNU/Linux arm*-*-linux* | |
afc05dd4 | 5322 | PowerPC GNU/Linux powerpc-*-linux* |
ed9a39eb | 5323 | |
7a292a7a SS |
5324 | * New targets |
5325 | ||
96baa820 | 5326 | Motorola MCore mcore-*-* |
adf40b2e JM |
5327 | x86 VxWorks i[3456]86-*-vxworks* |
5328 | PowerPC VxWorks powerpc-*-vxworks* | |
7a292a7a SS |
5329 | TI TMS320C80 tic80-*-* |
5330 | ||
085dd6e6 JM |
5331 | * OBSOLETE configurations |
5332 | ||
5333 | Altos 3068 m68*-altos-* | |
5334 | Convex c1-*-*, c2-*-* | |
9846de1b | 5335 | Pyramid pyramid-*-* |
ed9a39eb | 5336 | ARM RISCix arm-*-* (as host) |
104c1213 | 5337 | Tahoe tahoe-*-* |
7a292a7a | 5338 | |
9debab2f AC |
5339 | Configurations that have been declared obsolete will be commented out, |
5340 | but the code will be left in place. If there is no activity to revive | |
5341 | these configurations before the next release of GDB, the sources will | |
5342 | be permanently REMOVED. | |
5343 | ||
5330533d SS |
5344 | * Gould support removed |
5345 | ||
5346 | Support for the Gould PowerNode and NP1 has been removed. | |
5347 | ||
bc9e5bbf AC |
5348 | * New features for SVR4 |
5349 | ||
5350 | On SVR4 native platforms (such as Solaris), if you attach to a process | |
5351 | without first loading a symbol file, GDB will now attempt to locate and | |
5352 | load symbols from the running process's executable file. | |
5353 | ||
5354 | * Many C++ enhancements | |
5355 | ||
5356 | C++ support has been greatly improved. Overload resolution now works properly | |
5357 | in almost all cases. RTTI support is on the way. | |
5358 | ||
adf40b2e JM |
5359 | * Remote targets can connect to a sub-program |
5360 | ||
5361 | A popen(3) style serial-device has been added. This device starts a | |
5362 | sub-process (such as a stand-alone simulator) and then communicates | |
5363 | with that. The sub-program to run is specified using the syntax | |
5364 | ``|<program> <args>'' vis: | |
5365 | ||
5366 | (gdb) set remotedebug 1 | |
5367 | (gdb) target extended-remote |mn10300-elf-sim program-args | |
5368 | ||
43e526b9 JM |
5369 | * MIPS 64 remote protocol |
5370 | ||
5371 | A long standing bug in the mips64 remote protocol where by GDB | |
5372 | expected certain 32 bit registers (ex SR) to be transfered as 32 | |
5373 | instead of 64 bits has been fixed. | |
5374 | ||
5375 | The command ``set remote-mips64-transfers-32bit-regs on'' has been | |
5376 | added to provide backward compatibility with older versions of GDB. | |
5377 | ||
96baa820 JM |
5378 | * ``set remotebinarydownload'' replaced by ``set remote X-packet'' |
5379 | ||
5380 | The command ``set remotebinarydownload'' command has been replaced by | |
5381 | ``set remote X-packet''. Other commands in ``set remote'' family | |
5382 | include ``set remote P-packet''. | |
5383 | ||
11cf8741 JM |
5384 | * Breakpoint commands accept ranges. |
5385 | ||
5386 | The breakpoint commands ``enable'', ``disable'', and ``delete'' now | |
5387 | accept a range of breakpoints, e.g. ``5-7''. The tracepoint command | |
5388 | ``tracepoint passcount'' also accepts a range of tracepoints. | |
5389 | ||
7876dd43 DB |
5390 | * ``apropos'' command added. |
5391 | ||
5392 | The ``apropos'' command searches through command names and | |
5393 | documentation strings, printing out matches, making it much easier to | |
5394 | try to find a command that does what you are looking for. | |
5395 | ||
bc9e5bbf AC |
5396 | * New MI interface |
5397 | ||
5398 | A new machine oriented interface (MI) has been added to GDB. This | |
5399 | interface is designed for debug environments running GDB as a separate | |
7162c0ca EZ |
5400 | process. This is part of the long term libGDB project. See the |
5401 | "GDB/MI" chapter of the GDB manual for further information. It can be | |
5402 | enabled by configuring with: | |
bc9e5bbf AC |
5403 | |
5404 | .../configure --enable-gdbmi | |
5405 | ||
c906108c SS |
5406 | *** Changes in GDB-4.18: |
5407 | ||
5408 | * New native configurations | |
5409 | ||
5410 | HP-UX 10.20 hppa*-*-hpux10.20 | |
5411 | HP-UX 11.x hppa*-*-hpux11.0* | |
55241689 | 5412 | M68K GNU/Linux m68*-*-linux* |
c906108c SS |
5413 | |
5414 | * New targets | |
5415 | ||
5416 | Fujitsu FR30 fr30-*-elf* | |
5417 | Intel StrongARM strongarm-*-* | |
5418 | Mitsubishi D30V d30v-*-* | |
5419 | ||
5420 | * OBSOLETE configurations | |
5421 | ||
5422 | Gould PowerNode, NP1 np1-*-*, pn-*-* | |
5423 | ||
5424 | Configurations that have been declared obsolete will be commented out, | |
5425 | but the code will be left in place. If there is no activity to revive | |
5426 | these configurations before the next release of GDB, the sources will | |
5427 | be permanently REMOVED. | |
5428 | ||
5429 | * ANSI/ISO C | |
5430 | ||
5431 | As a compatibility experiment, GDB's source files buildsym.h and | |
5432 | buildsym.c have been converted to pure standard C, no longer | |
5433 | containing any K&R compatibility code. We believe that all systems in | |
5434 | use today either come with a standard C compiler, or have a GCC port | |
5435 | available. If this is not true, please report the affected | |
5436 | configuration to bug-gdb@gnu.org immediately. See the README file for | |
5437 | information about getting a standard C compiler if you don't have one | |
5438 | already. | |
5439 | ||
5440 | * Readline 2.2 | |
5441 | ||
5442 | GDB now uses readline 2.2. | |
5443 | ||
5444 | * set extension-language | |
5445 | ||
5446 | You can now control the mapping between filename extensions and source | |
5447 | languages by using the `set extension-language' command. For instance, | |
5448 | you can ask GDB to treat .c files as C++ by saying | |
5449 | set extension-language .c c++ | |
5450 | The command `info extensions' lists all of the recognized extensions | |
5451 | and their associated languages. | |
5452 | ||
5453 | * Setting processor type for PowerPC and RS/6000 | |
5454 | ||
5455 | When GDB is configured for a powerpc*-*-* or an rs6000*-*-* target, | |
5456 | you can use the `set processor' command to specify what variant of the | |
5457 | PowerPC family you are debugging. The command | |
5458 | ||
5459 | set processor NAME | |
5460 | ||
5461 | sets the PowerPC/RS6000 variant to NAME. GDB knows about the | |
5462 | following PowerPC and RS6000 variants: | |
5463 | ||
5464 | ppc-uisa PowerPC UISA - a PPC processor as viewed by user-level code | |
5465 | rs6000 IBM RS6000 ("POWER") architecture, user-level view | |
5466 | 403 IBM PowerPC 403 | |
5467 | 403GC IBM PowerPC 403GC | |
5468 | 505 Motorola PowerPC 505 | |
5469 | 860 Motorola PowerPC 860 or 850 | |
5470 | 601 Motorola PowerPC 601 | |
5471 | 602 Motorola PowerPC 602 | |
5472 | 603 Motorola/IBM PowerPC 603 or 603e | |
5473 | 604 Motorola PowerPC 604 or 604e | |
5474 | 750 Motorola/IBM PowerPC 750 or 750 | |
5475 | ||
5476 | At the moment, this command just tells GDB what to name the | |
5477 | special-purpose processor registers. Since almost all the affected | |
5478 | registers are inaccessible to user-level programs, this command is | |
5479 | only useful for remote debugging in its present form. | |
5480 | ||
5481 | * HP-UX support | |
5482 | ||
5483 | Thanks to a major code donation from Hewlett-Packard, GDB now has much | |
5484 | more extensive support for HP-UX. Added features include shared | |
5485 | library support, kernel threads and hardware watchpoints for 11.00, | |
5486 | support for HP's ANSI C and C++ compilers, and a compatibility mode | |
5487 | for xdb and dbx commands. | |
5488 | ||
5489 | * Catchpoints | |
5490 | ||
5491 | HP's donation includes the new concept of catchpoints, which is a | |
5492 | generalization of the old catch command. On HP-UX, it is now possible | |
5493 | to catch exec, fork, and vfork, as well as library loading. | |
5494 | ||
5495 | This means that the existing catch command has changed; its first | |
5496 | argument now specifies the type of catch to be set up. See the | |
5497 | output of "help catch" for a list of catchpoint types. | |
5498 | ||
5499 | * Debugging across forks | |
5500 | ||
5501 | On HP-UX, you can choose which process to debug when a fork() happens | |
5502 | in the inferior. | |
5503 | ||
5504 | * TUI | |
5505 | ||
5506 | HP has donated a curses-based terminal user interface (TUI). To get | |
5507 | it, build with --enable-tui. Although this can be enabled for any | |
5508 | configuration, at present it only works for native HP debugging. | |
5509 | ||
5510 | * GDB remote protocol additions | |
5511 | ||
5512 | A new protocol packet 'X' that writes binary data is now available. | |
5513 | Default behavior is to try 'X', then drop back to 'M' if the stub | |
5514 | fails to respond. The settable variable `remotebinarydownload' | |
5515 | allows explicit control over the use of 'X'. | |
5516 | ||
5517 | For 64-bit targets, the memory packets ('M' and 'm') can now contain a | |
5518 | full 64-bit address. The command | |
5519 | ||
5520 | set remoteaddresssize 32 | |
5521 | ||
5522 | can be used to revert to the old behaviour. For existing remote stubs | |
5523 | the change should not be noticed, as the additional address information | |
5524 | will be discarded. | |
5525 | ||
5526 | In order to assist in debugging stubs, you may use the maintenance | |
5527 | command `packet' to send any text string to the stub. For instance, | |
5528 | ||
5529 | maint packet heythere | |
5530 | ||
5531 | sends the packet "$heythere#<checksum>". Note that it is very easy to | |
5532 | disrupt a debugging session by sending the wrong packet at the wrong | |
5533 | time. | |
5534 | ||
5535 | The compare-sections command allows you to compare section data on the | |
5536 | target to what is in the executable file without uploading or | |
5537 | downloading, by comparing CRC checksums. | |
5538 | ||
5539 | * Tracing can collect general expressions | |
5540 | ||
5541 | You may now collect general expressions at tracepoints. This requires | |
5542 | further additions to the target-side stub; see tracepoint.c and | |
5543 | doc/agentexpr.texi for further details. | |
5544 | ||
5545 | * mask-address variable for Mips | |
5546 | ||
5547 | For Mips targets, you may control the zeroing of the upper 32 bits of | |
5548 | a 64-bit address by entering `set mask-address on'. This is mainly | |
5549 | of interest to users of embedded R4xxx and R5xxx processors. | |
5550 | ||
5551 | * Higher serial baud rates | |
5552 | ||
5553 | GDB's serial code now allows you to specify baud rates 57600, 115200, | |
5554 | 230400, and 460800 baud. (Note that your host system may not be able | |
5555 | to achieve all of these rates.) | |
5556 | ||
5557 | * i960 simulator | |
5558 | ||
5559 | The i960 configuration now includes an initial implementation of a | |
5560 | builtin simulator, contributed by Jim Wilson. | |
5561 | ||
5562 | ||
5563 | *** Changes in GDB-4.17: | |
5564 | ||
5565 | * New native configurations | |
5566 | ||
5567 | Alpha GNU/Linux alpha*-*-linux* | |
5568 | Unixware 2.x i[3456]86-unixware2* | |
5569 | Irix 6.x mips*-sgi-irix6* | |
5570 | PowerPC GNU/Linux powerpc-*-linux* | |
5571 | PowerPC Solaris powerpcle-*-solaris* | |
5572 | Sparc GNU/Linux sparc-*-linux* | |
5573 | Motorola sysV68 R3V7.1 m68k-motorola-sysv | |
5574 | ||
5575 | * New targets | |
5576 | ||
5577 | Argonaut Risc Chip (ARC) arc-*-* | |
5578 | Hitachi H8/300S h8300*-*-* | |
5579 | Matsushita MN10200 w/simulator mn10200-*-* | |
5580 | Matsushita MN10300 w/simulator mn10300-*-* | |
5581 | MIPS NEC VR4100 mips64*vr4100*{,el}-*-elf* | |
5582 | MIPS NEC VR5000 mips64*vr5000*{,el}-*-elf* | |
5583 | MIPS Toshiba TX39 mips64*tx39*{,el}-*-elf* | |
5584 | Mitsubishi D10V w/simulator d10v-*-* | |
5585 | Mitsubishi M32R/D w/simulator m32r-*-elf* | |
5586 | Tsqware Sparclet sparclet-*-* | |
5587 | NEC V850 w/simulator v850-*-* | |
5588 | ||
5589 | * New debugging protocols | |
5590 | ||
5591 | ARM with RDI protocol arm*-*-* | |
5592 | M68K with dBUG monitor m68*-*-{aout,coff,elf} | |
5593 | DDB and LSI variants of PMON protocol mips*-*-* | |
5594 | PowerPC with DINK32 monitor powerpc{,le}-*-eabi | |
5595 | PowerPC with SDS protocol powerpc{,le}-*-eabi | |
5596 | Macraigor OCD (Wiggler) devices powerpc{,le}-*-eabi | |
5597 | ||
5598 | * DWARF 2 | |
5599 | ||
5600 | All configurations can now understand and use the DWARF 2 debugging | |
5601 | format. The choice is automatic, if the symbol file contains DWARF 2 | |
5602 | information. | |
5603 | ||
5604 | * Java frontend | |
5605 | ||
5606 | GDB now includes basic Java language support. This support is | |
5607 | only useful with Java compilers that produce native machine code. | |
5608 | ||
5609 | * solib-absolute-prefix and solib-search-path | |
5610 | ||
5611 | For SunOS and SVR4 shared libraries, you may now set the prefix for | |
5612 | loading absolute shared library symbol files, and the search path for | |
5613 | locating non-absolute shared library symbol files. | |
5614 | ||
5615 | * Live range splitting | |
5616 | ||
5617 | GDB can now effectively debug code for which GCC has performed live | |
5618 | range splitting as part of its optimization. See gdb/doc/LRS for | |
5619 | more details on the expected format of the stabs information. | |
5620 | ||
5621 | * Hurd support | |
5622 | ||
5623 | GDB's support for the GNU Hurd, including thread debugging, has been | |
5624 | updated to work with current versions of the Hurd. | |
5625 | ||
5626 | * ARM Thumb support | |
5627 | ||
5628 | GDB's ARM target configuration now handles the ARM7T (Thumb) 16-bit | |
5629 | instruction set. ARM GDB automatically detects when Thumb | |
5630 | instructions are in use, and adjusts disassembly and backtracing | |
5631 | accordingly. | |
5632 | ||
5633 | * MIPS16 support | |
5634 | ||
5635 | GDB's MIPS target configurations now handle the MIP16 16-bit | |
5636 | instruction set. | |
5637 | ||
5638 | * Overlay support | |
5639 | ||
5640 | GDB now includes support for overlays; if an executable has been | |
5641 | linked such that multiple sections are based at the same address, GDB | |
5642 | will decide which section to use for symbolic info. You can choose to | |
5643 | control the decision manually, using overlay commands, or implement | |
5644 | additional target-side support and use "overlay load-target" to bring | |
5645 | in the overlay mapping. Do "help overlay" for more detail. | |
5646 | ||
5647 | * info symbol | |
5648 | ||
5649 | The command "info symbol <address>" displays information about | |
5650 | the symbol at the specified address. | |
5651 | ||
5652 | * Trace support | |
5653 | ||
5654 | The standard remote protocol now includes an extension that allows | |
5655 | asynchronous collection and display of trace data. This requires | |
5656 | extensive support in the target-side debugging stub. Tracing mode | |
5657 | includes a new interaction mode in GDB and new commands: see the | |
5658 | file tracepoint.c for more details. | |
5659 | ||
5660 | * MIPS simulator | |
5661 | ||
5662 | Configurations for embedded MIPS now include a simulator contributed | |
5663 | by Cygnus Solutions. The simulator supports the instruction sets | |
5664 | of most MIPS variants. | |
5665 | ||
5666 | * Sparc simulator | |
5667 | ||
5668 | Sparc configurations may now include the ERC32 simulator contributed | |
5669 | by the European Space Agency. The simulator is not built into | |
5670 | Sparc targets by default; configure with --enable-sim to include it. | |
5671 | ||
5672 | * set architecture | |
5673 | ||
5674 | For target configurations that may include multiple variants of a | |
5675 | basic architecture (such as MIPS and SH), you may now set the | |
5676 | architecture explicitly. "set arch" sets, "info arch" lists | |
5677 | the possible architectures. | |
5678 | ||
5679 | *** Changes in GDB-4.16: | |
5680 | ||
5681 | * New native configurations | |
5682 | ||
5683 | Windows 95, x86 Windows NT i[345]86-*-cygwin32 | |
5684 | M68K NetBSD m68k-*-netbsd* | |
5685 | PowerPC AIX 4.x powerpc-*-aix* | |
5686 | PowerPC MacOS powerpc-*-macos* | |
5687 | PowerPC Windows NT powerpcle-*-cygwin32 | |
5688 | RS/6000 AIX 4.x rs6000-*-aix4* | |
5689 | ||
5690 | * New targets | |
5691 | ||
5692 | ARM with RDP protocol arm-*-* | |
5693 | I960 with MON960 i960-*-coff | |
5694 | MIPS VxWorks mips*-*-vxworks* | |
5695 | MIPS VR4300 with PMON mips64*vr4300{,el}-*-elf* | |
5696 | PowerPC with PPCBUG monitor powerpc{,le}-*-eabi* | |
5697 | Hitachi SH3 sh-*-* | |
5698 | Matra Sparclet sparclet-*-* | |
5699 | ||
5700 | * PowerPC simulator | |
5701 | ||
5702 | The powerpc-eabi configuration now includes the PSIM simulator, | |
5703 | contributed by Andrew Cagney, with assistance from Mike Meissner. | |
5704 | PSIM is a very elaborate model of the PowerPC, including not only | |
5705 | basic instruction set execution, but also details of execution unit | |
5706 | performance and I/O hardware. See sim/ppc/README for more details. | |
5707 | ||
5708 | * Solaris 2.5 | |
5709 | ||
5710 | GDB now works with Solaris 2.5. | |
5711 | ||
5712 | * Windows 95/NT native | |
5713 | ||
5714 | GDB will now work as a native debugger on Windows 95 and Windows NT. | |
5715 | To build it from source, you must use the "gnu-win32" environment, | |
5716 | which uses a DLL to emulate enough of Unix to run the GNU tools. | |
5717 | Further information, binaries, and sources are available at | |
5718 | ftp.cygnus.com, under pub/gnu-win32. | |
5719 | ||
5720 | * dont-repeat command | |
5721 | ||
5722 | If a user-defined command includes the command `dont-repeat', then the | |
5723 | command will not be repeated if the user just types return. This is | |
5724 | useful if the command is time-consuming to run, so that accidental | |
5725 | extra keystrokes don't run the same command many times. | |
5726 | ||
5727 | * Send break instead of ^C | |
5728 | ||
5729 | The standard remote protocol now includes an option to send a break | |
5730 | rather than a ^C to the target in order to interrupt it. By default, | |
5731 | GDB will send ^C; to send a break, set the variable `remotebreak' to 1. | |
5732 | ||
5733 | * Remote protocol timeout | |
5734 | ||
5735 | The standard remote protocol includes a new variable `remotetimeout' | |
5736 | that allows you to set the number of seconds before GDB gives up trying | |
5737 | to read from the target. The default value is 2. | |
5738 | ||
5739 | * Automatic tracking of dynamic object loading (HPUX and Solaris only) | |
5740 | ||
5741 | By default GDB will automatically keep track of objects as they are | |
5742 | loaded and unloaded by the dynamic linker. By using the command `set | |
5743 | stop-on-solib-events 1' you can arrange for GDB to stop the inferior | |
5744 | when shared library events occur, thus allowing you to set breakpoints | |
5745 | in shared libraries which are explicitly loaded by the inferior. | |
5746 | ||
5747 | Note this feature does not work on hpux8. On hpux9 you must link | |
5748 | /usr/lib/end.o into your program. This feature should work | |
5749 | automatically on hpux10. | |
5750 | ||
5751 | * Irix 5.x hardware watchpoint support | |
5752 | ||
5753 | Irix 5 configurations now support the use of hardware watchpoints. | |
5754 | ||
5755 | * Mips protocol "SYN garbage limit" | |
5756 | ||
5757 | When debugging a Mips target using the `target mips' protocol, you | |
5758 | may set the number of characters that GDB will ignore by setting | |
5759 | the `syn-garbage-limit'. A value of -1 means that GDB will ignore | |
5760 | every character. The default value is 1050. | |
5761 | ||
5762 | * Recording and replaying remote debug sessions | |
5763 | ||
5764 | If you set `remotelogfile' to the name of a file, gdb will write to it | |
5765 | a recording of a remote debug session. This recording may then be | |
5766 | replayed back to gdb using "gdbreplay". See gdbserver/README for | |
5767 | details. This is useful when you have a problem with GDB while doing | |
5768 | remote debugging; you can make a recording of the session and send it | |
5769 | to someone else, who can then recreate the problem. | |
5770 | ||
5771 | * Speedups for remote debugging | |
5772 | ||
5773 | GDB includes speedups for downloading and stepping MIPS systems using | |
5774 | the IDT monitor, fast downloads to the Hitachi SH E7000 emulator, | |
5775 | and more efficient S-record downloading. | |
5776 | ||
5777 | * Memory use reductions and statistics collection | |
5778 | ||
5779 | GDB now uses less memory and reports statistics about memory usage. | |
5780 | Try the `maint print statistics' command, for example. | |
5781 | ||
5782 | *** Changes in GDB-4.15: | |
5783 | ||
5784 | * Psymtabs for XCOFF | |
5785 | ||
5786 | The symbol reader for AIX GDB now uses partial symbol tables. This | |
5787 | can greatly improve startup time, especially for large executables. | |
5788 | ||
5789 | * Remote targets use caching | |
5790 | ||
5791 | Remote targets now use a data cache to speed up communication with the | |
5792 | remote side. The data cache could lead to incorrect results because | |
5793 | it doesn't know about volatile variables, thus making it impossible to | |
5794 | debug targets which use memory mapped I/O devices. `set remotecache | |
5795 | off' turns the the data cache off. | |
5796 | ||
5797 | * Remote targets may have threads | |
5798 | ||
5799 | The standard remote protocol now includes support for multiple threads | |
5800 | in the target system, using new protocol commands 'H' and 'T'. See | |
5801 | gdb/remote.c for details. | |
5802 | ||
5803 | * NetROM support | |
5804 | ||
5805 | If GDB is configured with `--enable-netrom', then it will include | |
5806 | support for the NetROM ROM emulator from XLNT Designs. The NetROM | |
5807 | acts as though it is a bank of ROM on the target board, but you can | |
5808 | write into it over the network. GDB's support consists only of | |
5809 | support for fast loading into the emulated ROM; to debug, you must use | |
5810 | another protocol, such as standard remote protocol. The usual | |
5811 | sequence is something like | |
5812 | ||
5813 | target nrom <netrom-hostname> | |
5814 | load <prog> | |
5815 | target remote <netrom-hostname>:1235 | |
5816 | ||
5817 | * Macintosh host | |
5818 | ||
5819 | GDB now includes support for the Apple Macintosh, as a host only. It | |
5820 | may be run as either an MPW tool or as a standalone application, and | |
5821 | it can debug through the serial port. All the usual GDB commands are | |
5822 | available, but to the target command, you must supply "serial" as the | |
5823 | device type instead of "/dev/ttyXX". See mpw-README in the main | |
5824 | directory for more information on how to build. The MPW configuration | |
5825 | scripts */mpw-config.in support only a few targets, and only the | |
5826 | mips-idt-ecoff target has been tested. | |
5827 | ||
5828 | * Autoconf | |
5829 | ||
5830 | GDB configuration now uses autoconf. This is not user-visible, | |
5831 | but does simplify configuration and building. | |
5832 | ||
5833 | * hpux10 | |
5834 | ||
5835 | GDB now supports hpux10. | |
5836 | ||
5837 | *** Changes in GDB-4.14: | |
5838 | ||
5839 | * New native configurations | |
5840 | ||
5841 | x86 FreeBSD i[345]86-*-freebsd | |
5842 | x86 NetBSD i[345]86-*-netbsd | |
5843 | NS32k NetBSD ns32k-*-netbsd | |
5844 | Sparc NetBSD sparc-*-netbsd | |
5845 | ||
5846 | * New targets | |
5847 | ||
5848 | A29K VxWorks a29k-*-vxworks | |
5849 | HP PA PRO embedded (WinBond W89K & Oki OP50N) hppa*-*-pro* | |
5850 | CPU32 EST-300 emulator m68*-*-est* | |
5851 | PowerPC ELF powerpc-*-elf | |
5852 | WDC 65816 w65-*-* | |
5853 | ||
5854 | * Alpha OSF/1 support for procfs | |
5855 | ||
5856 | GDB now supports procfs under OSF/1-2.x and higher, which makes it | |
5857 | possible to attach to running processes. As the mounting of the /proc | |
5858 | filesystem is optional on the Alpha, GDB automatically determines | |
5859 | the availability of /proc during startup. This can lead to problems | |
5860 | if /proc is unmounted after GDB has been started. | |
5861 | ||
5862 | * Arguments to user-defined commands | |
5863 | ||
5864 | User commands may accept up to 10 arguments separated by whitespace. | |
5865 | Arguments are accessed within the user command via $arg0..$arg9. A | |
5866 | trivial example: | |
5867 | define adder | |
5868 | print $arg0 + $arg1 + $arg2 | |
5869 | ||
5870 | To execute the command use: | |
5871 | adder 1 2 3 | |
5872 | ||
5873 | Defines the command "adder" which prints the sum of its three arguments. | |
5874 | Note the arguments are text substitutions, so they may reference variables, | |
5875 | use complex expressions, or even perform inferior function calls. | |
5876 | ||
5877 | * New `if' and `while' commands | |
5878 | ||
5879 | This makes it possible to write more sophisticated user-defined | |
5880 | commands. Both commands take a single argument, which is the | |
5881 | expression to evaluate, and must be followed by the commands to | |
5882 | execute, one per line, if the expression is nonzero, the list being | |
5883 | terminated by the word `end'. The `if' command list may include an | |
5884 | `else' word, which causes the following commands to be executed only | |
5885 | if the expression is zero. | |
5886 | ||
5887 | * Fortran source language mode | |
5888 | ||
5889 | GDB now includes partial support for Fortran 77. It will recognize | |
5890 | Fortran programs and can evaluate a subset of Fortran expressions, but | |
5891 | variables and functions may not be handled correctly. GDB will work | |
5892 | with G77, but does not yet know much about symbols emitted by other | |
5893 | Fortran compilers. | |
5894 | ||
5895 | * Better HPUX support | |
5896 | ||
5897 | Most debugging facilities now work on dynamic executables for HPPAs | |
5898 | running hpux9 or later. You can attach to running dynamically linked | |
5899 | processes, but by default the dynamic libraries will be read-only, so | |
5900 | for instance you won't be able to put breakpoints in them. To change | |
5901 | that behavior do the following before running the program: | |
5902 | ||
5903 | adb -w a.out | |
5904 | __dld_flags?W 0x5 | |
5905 | control-d | |
5906 | ||
5907 | This will cause the libraries to be mapped private and read-write. | |
5908 | To revert to the normal behavior, do this: | |
5909 | ||
5910 | adb -w a.out | |
5911 | __dld_flags?W 0x4 | |
5912 | control-d | |
5913 | ||
5914 | You cannot set breakpoints or examine data in the library until after | |
5915 | the library is loaded if the function/data symbols do not have | |
5916 | external linkage. | |
5917 | ||
5918 | GDB can now also read debug symbols produced by the HP C compiler on | |
5919 | HPPAs (sorry, no C++, Fortran or 68k support). | |
5920 | ||
5921 | * Target byte order now dynamically selectable | |
5922 | ||
5923 | You can choose which byte order to use with a target system, via the | |
5924 | commands "set endian big" and "set endian little", and you can see the | |
5925 | current setting by using "show endian". You can also give the command | |
5926 | "set endian auto", in which case GDB will use the byte order | |
5927 | associated with the executable. Currently, only embedded MIPS | |
5928 | configurations support dynamic selection of target byte order. | |
5929 | ||
5930 | * New DOS host serial code | |
5931 | ||
5932 | This version uses DPMI interrupts to handle buffered I/O, so you | |
5933 | no longer need to run asynctsr when debugging boards connected to | |
5934 | a PC's serial port. | |
5935 | ||
5936 | *** Changes in GDB-4.13: | |
5937 | ||
5938 | * New "complete" command | |
5939 | ||
5940 | This lists all the possible completions for the rest of the line, if it | |
5941 | were to be given as a command itself. This is intended for use by emacs. | |
5942 | ||
5943 | * Trailing space optional in prompt | |
5944 | ||
5945 | "set prompt" no longer adds a space for you after the prompt you set. This | |
5946 | allows you to set a prompt which ends in a space or one that does not. | |
5947 | ||
5948 | * Breakpoint hit counts | |
5949 | ||
5950 | "info break" now displays a count of the number of times the breakpoint | |
5951 | has been hit. This is especially useful in conjunction with "ignore"; you | |
5952 | can ignore a large number of breakpoint hits, look at the breakpoint info | |
5953 | to see how many times the breakpoint was hit, then run again, ignoring one | |
5954 | less than that number, and this will get you quickly to the last hit of | |
5955 | that breakpoint. | |
5956 | ||
5957 | * Ability to stop printing at NULL character | |
5958 | ||
5959 | "set print null-stop" will cause GDB to stop printing the characters of | |
5960 | an array when the first NULL is encountered. This is useful when large | |
5961 | arrays actually contain only short strings. | |
5962 | ||
5963 | * Shared library breakpoints | |
5964 | ||
5965 | In SunOS 4.x, SVR4, and Alpha OSF/1 configurations, you can now set | |
5966 | breakpoints in shared libraries before the executable is run. | |
5967 | ||
5968 | * Hardware watchpoints | |
5969 | ||
5970 | There is a new hardware breakpoint for the watch command for sparclite | |
5971 | targets. See gdb/sparclite/hw_breakpoint.note. | |
5972 | ||
55241689 | 5973 | Hardware watchpoints are also now supported under GNU/Linux. |
c906108c SS |
5974 | |
5975 | * Annotations | |
5976 | ||
5977 | Annotations have been added. These are for use with graphical interfaces, | |
5978 | and are still experimental. Currently only gdba.el uses these. | |
5979 | ||
5980 | * Improved Irix 5 support | |
5981 | ||
5982 | GDB now works properly with Irix 5.2. | |
5983 | ||
5984 | * Improved HPPA support | |
5985 | ||
5986 | GDB now works properly with the latest GCC and GAS. | |
5987 | ||
5988 | * New native configurations | |
5989 | ||
5990 | Sequent PTX4 i[34]86-sequent-ptx4 | |
5991 | HPPA running OSF/1 hppa*-*-osf* | |
5992 | Atari TT running SVR4 m68*-*-sysv4* | |
5993 | RS/6000 LynxOS rs6000-*-lynxos* | |
5994 | ||
5995 | * New targets | |
5996 | ||
5997 | OS/9000 i[34]86-*-os9k | |
5998 | MIPS R4000 mips64*{,el}-*-{ecoff,elf} | |
5999 | Sparc64 sparc64-*-* | |
6000 | ||
6001 | * Hitachi SH7000 and E7000-PC ICE support | |
6002 | ||
6003 | There is now support for communicating with the Hitachi E7000-PC ICE. | |
6004 | This is available automatically when GDB is configured for the SH. | |
6005 | ||
6006 | * Fixes | |
6007 | ||
6008 | As usual, a variety of small fixes and improvements, both generic | |
6009 | and configuration-specific. See the ChangeLog for more detail. | |
6010 | ||
6011 | *** Changes in GDB-4.12: | |
6012 | ||
6013 | * Irix 5 is now supported | |
6014 | ||
6015 | * HPPA support | |
6016 | ||
6017 | GDB-4.12 on the HPPA has a number of changes which make it unable | |
6018 | to debug the output from the currently released versions of GCC and | |
6019 | GAS (GCC 2.5.8 and GAS-2.2 or PAGAS-1.36). Until the next major release | |
6020 | of GCC and GAS, versions of these tools designed to work with GDB-4.12 | |
6021 | can be retrieved via anonymous ftp from jaguar.cs.utah.edu:/dist. | |
6022 | ||
6023 | ||
6024 | *** Changes in GDB-4.11: | |
6025 | ||
6026 | * User visible changes: | |
6027 | ||
6028 | * Remote Debugging | |
6029 | ||
6030 | The "set remotedebug" option is now consistent between the mips remote | |
6031 | target, remote targets using the gdb-specific protocol, UDI (AMD's | |
6032 | debug protocol for the 29k) and the 88k bug monitor. It is now an | |
6033 | integer specifying a debug level (normally 0 or 1, but 2 means more | |
6034 | debugging info for the mips target). | |
6035 | ||
6036 | * DEC Alpha native support | |
6037 | ||
6038 | GDB now works on the DEC Alpha. GCC 2.4.5 does not produce usable | |
6039 | debug info, but GDB works fairly well with the DEC compiler and should | |
6040 | work with a future GCC release. See the README file for a few | |
6041 | Alpha-specific notes. | |
6042 | ||
6043 | * Preliminary thread implementation | |
6044 | ||
6045 | GDB now has preliminary thread support for both SGI/Irix and LynxOS. | |
6046 | ||
6047 | * LynxOS native and target support for 386 | |
6048 | ||
6049 | This release has been hosted on LynxOS 2.2, and also can be configured | |
6050 | to remotely debug programs running under LynxOS (see gdb/gdbserver/README | |
6051 | for details). | |
6052 | ||
6053 | * Improvements in C++ mangling/demangling. | |
6054 | ||
6055 | This release has much better g++ debugging, specifically in name | |
6056 | mangling/demangling, virtual function calls, print virtual table, | |
6057 | call methods, ...etc. | |
6058 | ||
6059 | *** Changes in GDB-4.10: | |
6060 | ||
6061 | * User visible changes: | |
6062 | ||
6063 | Remote debugging using the GDB-specific (`target remote') protocol now | |
6064 | supports the `load' command. This is only useful if you have some | |
6065 | other way of getting the stub to the target system, and you can put it | |
6066 | somewhere in memory where it won't get clobbered by the download. | |
6067 | ||
6068 | Filename completion now works. | |
6069 | ||
6070 | When run under emacs mode, the "info line" command now causes the | |
6071 | arrow to point to the line specified. Also, "info line" prints | |
6072 | addresses in symbolic form (as well as hex). | |
6073 | ||
6074 | All vxworks based targets now support a user settable option, called | |
6075 | vxworks-timeout. This option represents the number of seconds gdb | |
6076 | should wait for responses to rpc's. You might want to use this if | |
6077 | your vxworks target is, perhaps, a slow software simulator or happens | |
6078 | to be on the far side of a thin network line. | |
6079 | ||
6080 | * DEC alpha support | |
6081 | ||
6082 | This release contains support for using a DEC alpha as a GDB host for | |
6083 | cross debugging. Native alpha debugging is not supported yet. | |
6084 | ||
6085 | ||
6086 | *** Changes in GDB-4.9: | |
6087 | ||
6088 | * Testsuite | |
6089 | ||
6090 | This is the first GDB release which is accompanied by a matching testsuite. | |
6091 | The testsuite requires installation of dejagnu, which should be available | |
6092 | via ftp from most sites that carry GNU software. | |
6093 | ||
6094 | * C++ demangling | |
6095 | ||
6096 | 'Cfront' style demangling has had its name changed to 'ARM' style, to | |
6097 | emphasize that it was written from the specifications in the C++ Annotated | |
6098 | Reference Manual, not necessarily to be compatible with AT&T cfront. Despite | |
6099 | disclaimers, it still generated too much confusion with users attempting to | |
6100 | use gdb with AT&T cfront. | |
6101 | ||
6102 | * Simulators | |
6103 | ||
6104 | GDB now uses a standard remote interface to a simulator library. | |
6105 | So far, the library contains simulators for the Zilog Z8001/2, the | |
6106 | Hitachi H8/300, H8/500 and Super-H. | |
6107 | ||
6108 | * New targets supported | |
6109 | ||
6110 | H8/300 simulator h8300-hitachi-hms or h8300hms | |
6111 | H8/500 simulator h8500-hitachi-hms or h8500hms | |
6112 | SH simulator sh-hitachi-hms or sh | |
6113 | Z8000 simulator z8k-zilog-none or z8ksim | |
6114 | IDT MIPS board over serial line mips-idt-ecoff | |
6115 | ||
6116 | Cross-debugging to GO32 targets is supported. It requires a custom | |
6117 | version of the i386-stub.c module which is integrated with the | |
6118 | GO32 memory extender. | |
6119 | ||
6120 | * New remote protocols | |
6121 | ||
6122 | MIPS remote debugging protocol. | |
6123 | ||
6124 | * New source languages supported | |
6125 | ||
6126 | This version includes preliminary support for Chill, a Pascal like language | |
6127 | used by telecommunications companies. Chill support is also being integrated | |
6128 | into the GNU compiler, but we don't know when it will be publically available. | |
6129 | ||
6130 | ||
6131 | *** Changes in GDB-4.8: | |
6132 | ||
6133 | * HP Precision Architecture supported | |
6134 | ||
6135 | GDB now supports HP PA-RISC machines running HPUX. A preliminary | |
6136 | version of this support was available as a set of patches from the | |
6137 | University of Utah. GDB does not support debugging of programs | |
6138 | compiled with the HP compiler, because HP will not document their file | |
6139 | format. Instead, you must use GCC (version 2.3.2 or later) and PA-GAS | |
6140 | (as available from jaguar.cs.utah.edu:/dist/pa-gas.u4.tar.Z). | |
6141 | ||
6142 | Many problems in the preliminary version have been fixed. | |
6143 | ||
6144 | * Faster and better demangling | |
6145 | ||
6146 | We have improved template demangling and fixed numerous bugs in the GNU style | |
6147 | demangler. It can now handle type modifiers such as `static' or `const'. Wide | |
6148 | character types (wchar_t) are now supported. Demangling of each symbol is now | |
6149 | only done once, and is cached when the symbol table for a file is read in. | |
6150 | This results in a small increase in memory usage for C programs, a moderate | |
6151 | increase in memory usage for C++ programs, and a fantastic speedup in | |
6152 | symbol lookups. | |
6153 | ||
6154 | `Cfront' style demangling still doesn't work with AT&T cfront. It was written | |
6155 | from the specifications in the Annotated Reference Manual, which AT&T's | |
6156 | compiler does not actually implement. | |
6157 | ||
6158 | * G++ multiple inheritance compiler problem | |
6159 | ||
6160 | In the 2.3.2 release of gcc/g++, how the compiler resolves multiple | |
6161 | inheritance lattices was reworked to properly discover ambiguities. We | |
6162 | recently found an example which causes this new algorithm to fail in a | |
6163 | very subtle way, producing bad debug information for those classes. | |
6164 | The file 'gcc.patch' (in this directory) can be applied to gcc to | |
6165 | circumvent the problem. A future GCC release will contain a complete | |
6166 | fix. | |
6167 | ||
6168 | The previous G++ debug info problem (mentioned below for the gdb-4.7 | |
6169 | release) is fixed in gcc version 2.3.2. | |
6170 | ||
6171 | * Improved configure script | |
6172 | ||
6173 | The `configure' script will now attempt to guess your system type if | |
6174 | you don't supply a host system type. The old scheme of supplying a | |
6175 | host system triplet is preferable over using this. All the magic is | |
6176 | done in the new `config.guess' script. Examine it for details. | |
6177 | ||
6178 | We have also brought our configure script much more in line with the FSF's | |
6179 | version. It now supports the --with-xxx options. In particular, | |
6180 | `--with-minimal-bfd' can be used to make the GDB binary image smaller. | |
6181 | The resulting GDB will not be able to read arbitrary object file formats -- | |
6182 | only the format ``expected'' to be used on the configured target system. | |
6183 | We hope to make this the default in a future release. | |
6184 | ||
6185 | * Documentation improvements | |
6186 | ||
6187 | There's new internal documentation on how to modify GDB, and how to | |
6188 | produce clean changes to the code. We implore people to read it | |
6189 | before submitting changes. | |
6190 | ||
6191 | The GDB manual uses new, sexy Texinfo conditionals, rather than arcane | |
6192 | M4 macros. The new texinfo.tex is provided in this release. Pre-built | |
6193 | `info' files are also provided. To build `info' files from scratch, | |
6194 | you will need the latest `makeinfo' release, which will be available in | |
6195 | a future texinfo-X.Y release. | |
6196 | ||
6197 | *NOTE* The new texinfo.tex can cause old versions of TeX to hang. | |
6198 | We're not sure exactly which versions have this problem, but it has | |
6199 | been seen in 3.0. We highly recommend upgrading to TeX version 3.141 | |
6200 | or better. If that isn't possible, there is a patch in | |
6201 | `texinfo/tex3patch' that will modify `texinfo/texinfo.tex' to work | |
6202 | around this problem. | |
6203 | ||
6204 | * New features | |
6205 | ||
6206 | GDB now supports array constants that can be used in expressions typed in by | |
6207 | the user. The syntax is `{element, element, ...}'. Ie: you can now type | |
6208 | `print {1, 2, 3}', and it will build up an array in memory malloc'd in | |
6209 | the target program. | |
6210 | ||
6211 | The new directory `gdb/sparclite' contains a program that demonstrates | |
6212 | how the sparc-stub.c remote stub runs on a Fujitsu SPARClite processor. | |
6213 | ||
6214 | * New native hosts supported | |
6215 | ||
6216 | HP/PA-RISC under HPUX using GNU tools hppa1.1-hp-hpux | |
6217 | 386 CPUs running SCO Unix 3.2v4 i386-unknown-sco3.2v4 | |
6218 | ||
6219 | * New targets supported | |
6220 | ||
6221 | AMD 29k family via UDI a29k-amd-udi or udi29k | |
6222 | ||
6223 | * New file formats supported | |
6224 | ||
6225 | BFD now supports reading HP/PA-RISC executables (SOM file format?), | |
6226 | HPUX core files, and SCO 3.2v2 core files. | |
6227 | ||
6228 | * Major bug fixes | |
6229 | ||
6230 | Attaching to processes now works again; thanks for the many bug reports. | |
6231 | ||
6232 | We have also stomped on a bunch of core dumps caused by | |
6233 | printf_filtered("%s") problems. | |
6234 | ||
6235 | We eliminated a copyright problem on the rpc and ptrace header files | |
6236 | for VxWorks, which was discovered at the last minute during the 4.7 | |
6237 | release. You should now be able to build a VxWorks GDB. | |
6238 | ||
6239 | You can now interrupt gdb while an attached process is running. This | |
6240 | will cause the attached process to stop, and give control back to GDB. | |
6241 | ||
6242 | We fixed problems caused by using too many file descriptors | |
6243 | for reading symbols from object files and libraries. This was | |
6244 | especially a problem for programs that used many (~100) shared | |
6245 | libraries. | |
6246 | ||
6247 | The `step' command now only enters a subroutine if there is line number | |
6248 | information for the subroutine. Otherwise it acts like the `next' | |
6249 | command. Previously, `step' would enter subroutines if there was | |
6250 | any debugging information about the routine. This avoids problems | |
6251 | when using `cc -g1' on MIPS machines. | |
6252 | ||
6253 | * Internal improvements | |
6254 | ||
6255 | GDB's internal interfaces have been improved to make it easier to support | |
6256 | debugging of multiple languages in the future. | |
6257 | ||
6258 | GDB now uses a common structure for symbol information internally. | |
6259 | Minimal symbols (derived from linkage symbols in object files), partial | |
6260 | symbols (from a quick scan of debug information), and full symbols | |
6261 | contain a common subset of information, making it easier to write | |
6262 | shared code that handles any of them. | |
6263 | ||
6264 | * New command line options | |
6265 | ||
6266 | We now accept --silent as an alias for --quiet. | |
6267 | ||
6268 | * Mmalloc licensing | |
6269 | ||
6270 | The memory-mapped-malloc library is now licensed under the GNU Library | |
6271 | General Public License. | |
6272 | ||
6273 | *** Changes in GDB-4.7: | |
6274 | ||
6275 | * Host/native/target split | |
6276 | ||
6277 | GDB has had some major internal surgery to untangle the support for | |
6278 | hosts and remote targets. Now, when you configure GDB for a remote | |
6279 | target, it will no longer load in all of the support for debugging | |
6280 | local programs on the host. When fully completed and tested, this will | |
6281 | ensure that arbitrary host/target combinations are possible. | |
6282 | ||
6283 | The primary conceptual shift is to separate the non-portable code in | |
6284 | GDB into three categories. Host specific code is required any time GDB | |
6285 | is compiled on that host, regardless of the target. Target specific | |
6286 | code relates to the peculiarities of the target, but can be compiled on | |
6287 | any host. Native specific code is everything else: it can only be | |
6288 | built when the host and target are the same system. Child process | |
6289 | handling and core file support are two common `native' examples. | |
6290 | ||
6291 | GDB's use of /proc for controlling Unix child processes is now cleaner. | |
6292 | It has been split out into a single module under the `target_ops' vector, | |
6293 | plus two native-dependent functions for each system that uses /proc. | |
6294 | ||
6295 | * New hosts supported | |
6296 | ||
6297 | HP/Apollo 68k (under the BSD domain) m68k-apollo-bsd or apollo68bsd | |
6298 | 386 CPUs running various BSD ports i386-unknown-bsd or 386bsd | |
6299 | 386 CPUs running SCO Unix i386-unknown-scosysv322 or i386sco | |
6300 | ||
6301 | * New targets supported | |
6302 | ||
6303 | Fujitsu SPARClite sparclite-fujitsu-none or sparclite | |
6304 | 68030 and CPU32 m68030-*-*, m68332-*-* | |
6305 | ||
6306 | * New native hosts supported | |
6307 | ||
6308 | 386 CPUs running various BSD ports i386-unknown-bsd or 386bsd | |
6309 | (386bsd is not well tested yet) | |
6310 | 386 CPUs running SCO Unix i386-unknown-scosysv322 or sco | |
6311 | ||
6312 | * New file formats supported | |
6313 | ||
6314 | BFD now supports COFF files for the Zilog Z8000 microprocessor. It | |
6315 | supports reading of `a.out.adobe' object files, which are an a.out | |
6316 | format extended with minimal information about multiple sections. | |
6317 | ||
6318 | * New commands | |
6319 | ||
6320 | `show copying' is the same as the old `info copying'. | |
6321 | `show warranty' is the same as `info warrantee'. | |
6322 | These were renamed for consistency. The old commands continue to work. | |
6323 | ||
6324 | `info handle' is a new alias for `info signals'. | |
6325 | ||
6326 | You can now define pre-command hooks, which attach arbitrary command | |
6327 | scripts to any command. The commands in the hook will be executed | |
6328 | prior to the user's command. You can also create a hook which will be | |
6329 | executed whenever the program stops. See gdb.texinfo. | |
6330 | ||
6331 | * C++ improvements | |
6332 | ||
6333 | We now deal with Cfront style name mangling, and can even extract type | |
6334 | info from mangled symbols. GDB can automatically figure out which | |
6335 | symbol mangling style your C++ compiler uses. | |
6336 | ||
6337 | Calling of methods and virtual functions has been improved as well. | |
6338 | ||
6339 | * Major bug fixes | |
6340 | ||
6341 | The crash that occured when debugging Sun Ansi-C compiled binaries is | |
6342 | fixed. This was due to mishandling of the extra N_SO stabs output | |
6343 | by the compiler. | |
6344 | ||
6345 | We also finally got Ultrix 4.2 running in house, and fixed core file | |
6346 | support, with help from a dozen people on the net. | |
6347 | ||
6348 | John M. Farrell discovered that the reason that single-stepping was so | |
6349 | slow on all of the Mips based platforms (primarily SGI and DEC) was | |
6350 | that we were trying to demangle and lookup a symbol used for internal | |
6351 | purposes on every instruction that was being stepped through. Changing | |
6352 | the name of that symbol so that it couldn't be mistaken for a C++ | |
6353 | mangled symbol sped things up a great deal. | |
6354 | ||
6355 | Rich Pixley sped up symbol lookups in general by getting much smarter | |
6356 | about when C++ symbol mangling is necessary. This should make symbol | |
6357 | completion (TAB on the command line) much faster. It's not as fast as | |
6358 | we'd like, but it's significantly faster than gdb-4.6. | |
6359 | ||
6360 | * AMD 29k support | |
6361 | ||
6362 | A new user controllable variable 'call_scratch_address' can | |
6363 | specify the location of a scratch area to be used when GDB | |
6364 | calls a function in the target. This is necessary because the | |
6365 | usual method of putting the scratch area on the stack does not work | |
6366 | in systems that have separate instruction and data spaces. | |
6367 | ||
6368 | We integrated changes to support the 29k UDI (Universal Debugger | |
6369 | Interface), but discovered at the last minute that we didn't have all | |
6370 | of the appropriate copyright paperwork. We are working with AMD to | |
6371 | resolve this, and hope to have it available soon. | |
6372 | ||
6373 | * Remote interfaces | |
6374 | ||
6375 | We have sped up the remote serial line protocol, especially for targets | |
6376 | with lots of registers. It now supports a new `expedited status' ('T') | |
6377 | message which can be used in place of the existing 'S' status message. | |
6378 | This allows the remote stub to send only the registers that GDB | |
6379 | needs to make a quick decision about single-stepping or conditional | |
6380 | breakpoints, eliminating the need to fetch the entire register set for | |
6381 | each instruction being stepped through. | |
6382 | ||
6383 | The GDB remote serial protocol now implements a write-through cache for | |
6384 | registers, only re-reading the registers if the target has run. | |
6385 | ||
6386 | There is also a new remote serial stub for SPARC processors. You can | |
6387 | find it in gdb-4.7/gdb/sparc-stub.c. This was written to support the | |
6388 | Fujitsu SPARClite processor, but will run on any stand-alone SPARC | |
6389 | processor with a serial port. | |
6390 | ||
6391 | * Configuration | |
6392 | ||
6393 | Configure.in files have become much easier to read and modify. A new | |
6394 | `table driven' format makes it more obvious what configurations are | |
6395 | supported, and what files each one uses. | |
6396 | ||
6397 | * Library changes | |
6398 | ||
6399 | There is a new opcodes library which will eventually contain all of the | |
6400 | disassembly routines and opcode tables. At present, it only contains | |
6401 | Sparc and Z8000 routines. This will allow the assembler, debugger, and | |
6402 | disassembler (binutils/objdump) to share these routines. | |
6403 | ||
6404 | The libiberty library is now copylefted under the GNU Library General | |
6405 | Public License. This allows more liberal use, and was done so libg++ | |
6406 | can use it. This makes no difference to GDB, since the Library License | |
6407 | grants all the rights from the General Public License. | |
6408 | ||
6409 | * Documentation | |
6410 | ||
6411 | The file gdb-4.7/gdb/doc/stabs.texinfo is a (relatively) complete | |
6412 | reference to the stabs symbol info used by the debugger. It is (as far | |
6413 | as we know) the only published document on this fascinating topic. We | |
6414 | encourage you to read it, compare it to the stabs information on your | |
6415 | system, and send improvements on the document in general (to | |
6416 | bug-gdb@prep.ai.mit.edu). | |
6417 | ||
6418 | And, of course, many bugs have been fixed. | |
6419 | ||
6420 | ||
6421 | *** Changes in GDB-4.6: | |
6422 | ||
6423 | * Better support for C++ function names | |
6424 | ||
6425 | GDB now accepts as input the "demangled form" of C++ overloaded function | |
6426 | names and member function names, and can do command completion on such names | |
6427 | (using TAB, TAB-TAB, and ESC-?). The names have to be quoted with a pair of | |
6428 | single quotes. Examples are 'func (int, long)' and 'obj::operator==(obj&)'. | |
6429 | Make use of command completion, it is your friend. | |
6430 | ||
6431 | GDB also now accepts a variety of C++ mangled symbol formats. They are | |
6432 | the GNU g++ style, the Cfront (ARM) style, and the Lucid (lcc) style. | |
6433 | You can tell GDB which format to use by doing a 'set demangle-style {gnu, | |
6434 | lucid, cfront, auto}'. 'gnu' is the default. Do a 'set demangle-style foo' | |
6435 | for the list of formats. | |
6436 | ||
6437 | * G++ symbol mangling problem | |
6438 | ||
6439 | Recent versions of gcc have a bug in how they emit debugging information for | |
6440 | C++ methods (when using dbx-style stabs). The file 'gcc.patch' (in this | |
6441 | directory) can be applied to gcc to fix the problem. Alternatively, if you | |
6442 | can't fix gcc, you can #define GCC_MANGLE_BUG when compling gdb/symtab.c. The | |
6443 | usual symptom is difficulty with setting breakpoints on methods. GDB complains | |
6444 | about the method being non-existent. (We believe that version 2.2.2 of GCC has | |
6445 | this problem.) | |
6446 | ||
6447 | * New 'maintenance' command | |
6448 | ||
6449 | All of the commands related to hacking GDB internals have been moved out of | |
6450 | the main command set, and now live behind the 'maintenance' command. This | |
6451 | can also be abbreviated as 'mt'. The following changes were made: | |
6452 | ||
6453 | dump-me -> maintenance dump-me | |
6454 | info all-breakpoints -> maintenance info breakpoints | |
6455 | printmsyms -> maintenance print msyms | |
6456 | printobjfiles -> maintenance print objfiles | |
6457 | printpsyms -> maintenance print psymbols | |
6458 | printsyms -> maintenance print symbols | |
6459 | ||
6460 | The following commands are new: | |
6461 | ||
6462 | maintenance demangle Call internal GDB demangler routine to | |
6463 | demangle a C++ link name and prints the result. | |
6464 | maintenance print type Print a type chain for a given symbol | |
6465 | ||
6466 | * Change to .gdbinit file processing | |
6467 | ||
6468 | We now read the $HOME/.gdbinit file before processing the argv arguments | |
6469 | (e.g. reading symbol files or core files). This allows global parameters to | |
6470 | be set, which will apply during the symbol reading. The ./.gdbinit is still | |
6471 | read after argv processing. | |
6472 | ||
6473 | * New hosts supported | |
6474 | ||
6475 | Solaris-2.0 !!! sparc-sun-solaris2 or sun4sol2 | |
6476 | ||
55241689 | 6477 | GNU/Linux support i386-unknown-linux or linux |
c906108c SS |
6478 | |
6479 | We are also including code to support the HP/PA running BSD and HPUX. This | |
6480 | is almost guaranteed not to work, as we didn't have time to test or build it | |
6481 | for this release. We are including it so that the more adventurous (or | |
6482 | masochistic) of you can play with it. We also had major problems with the | |
6483 | fact that the compiler that we got from HP doesn't support the -g option. | |
6484 | It costs extra. | |
6485 | ||
6486 | * New targets supported | |
6487 | ||
6488 | Hitachi H8/300 h8300-hitachi-hms or h8300hms | |
6489 | ||
6490 | * More smarts about finding #include files | |
6491 | ||
6492 | GDB now remembers the compilation directory for all include files, and for | |
6493 | all files from which C is generated (like yacc and lex sources). This | |
6494 | greatly improves GDB's ability to find yacc/lex sources, and include files, | |
6495 | especially if you are debugging your program from a directory different from | |
6496 | the one that contains your sources. | |
6497 | ||
6498 | We also fixed a bug which caused difficulty with listing and setting | |
6499 | breakpoints in include files which contain C code. (In the past, you had to | |
6500 | try twice in order to list an include file that you hadn't looked at before.) | |
6501 | ||
6502 | * Interesting infernals change | |
6503 | ||
6504 | GDB now deals with arbitrary numbers of sections, where the symbols for each | |
6505 | section must be relocated relative to that section's landing place in the | |
6506 | target's address space. This work was needed to support ELF with embedded | |
6507 | stabs used by Solaris-2.0. | |
6508 | ||
6509 | * Bug fixes (of course!) | |
6510 | ||
6511 | There have been loads of fixes for the following things: | |
6512 | mips, rs6000, 29k/udi, m68k, g++, type handling, elf/dwarf, m88k, | |
6513 | i960, stabs, DOS(GO32), procfs, etc... | |
6514 | ||
6515 | See the ChangeLog for details. | |
6516 | ||
6517 | *** Changes in GDB-4.5: | |
6518 | ||
6519 | * New machines supported (host and target) | |
6520 | ||
6521 | IBM RS6000 running AIX rs6000-ibm-aix or rs6000 | |
6522 | ||
6523 | SGI Irix-4.x mips-sgi-irix4 or iris4 | |
6524 | ||
6525 | * New malloc package | |
6526 | ||
6527 | GDB now uses a new memory manager called mmalloc, based on gmalloc. | |
6528 | Mmalloc is capable of handling mutiple heaps of memory. It is also | |
6529 | capable of saving a heap to a file, and then mapping it back in later. | |
6530 | This can be used to greatly speedup the startup of GDB by using a | |
6531 | pre-parsed symbol table which lives in a mmalloc managed heap. For | |
6532 | more details, please read mmalloc/mmalloc.texi. | |
6533 | ||
6534 | * info proc | |
6535 | ||
6536 | The 'info proc' command (SVR4 only) has been enhanced quite a bit. See | |
6537 | 'help info proc' for details. | |
6538 | ||
6539 | * MIPS ecoff symbol table format | |
6540 | ||
6541 | The code that reads MIPS symbol table format is now supported on all hosts. | |
6542 | Thanks to MIPS for releasing the sym.h and symconst.h files to make this | |
6543 | possible. | |
6544 | ||
6545 | * File name changes for MS-DOS | |
6546 | ||
6547 | Many files in the config directories have been renamed to make it easier to | |
6548 | support GDB on MS-DOSe systems (which have very restrictive file name | |
6549 | conventions :-( ). MS-DOSe host support (under DJ Delorie's GO32 | |
6550 | environment) is close to working but has some remaining problems. Note | |
6551 | that debugging of DOS programs is not supported, due to limitations | |
6552 | in the ``operating system'', but it can be used to host cross-debugging. | |
6553 | ||
6554 | * Cross byte order fixes | |
6555 | ||
6556 | Many fixes have been made to support cross debugging of Sparc and MIPS | |
6557 | targets from hosts whose byte order differs. | |
6558 | ||
6559 | * New -mapped and -readnow options | |
6560 | ||
6561 | If memory-mapped files are available on your system through the 'mmap' | |
6562 | system call, you can use the -mapped option on the `file' or | |
6563 | `symbol-file' commands to cause GDB to write the symbols from your | |
6564 | program into a reusable file. If the program you are debugging is | |
6565 | called `/path/fred', the mapped symbol file will be `./fred.syms'. | |
6566 | Future GDB debugging sessions will notice the presence of this file, | |
6567 | and will quickly map in symbol information from it, rather than reading | |
6568 | the symbol table from the executable program. Using the '-mapped' | |
6569 | option in a GDB `file' or `symbol-file' command has the same effect as | |
6570 | starting GDB with the '-mapped' command-line option. | |
6571 | ||
6572 | You can cause GDB to read the entire symbol table immediately by using | |
6573 | the '-readnow' option with any of the commands that load symbol table | |
6574 | information (or on the GDB command line). This makes the command | |
6575 | slower, but makes future operations faster. | |
6576 | ||
6577 | The -mapped and -readnow options are typically combined in order to | |
6578 | build a `fred.syms' file that contains complete symbol information. | |
6579 | A simple GDB invocation to do nothing but build a `.syms' file for future | |
6580 | use is: | |
6581 | ||
6582 | gdb -batch -nx -mapped -readnow programname | |
6583 | ||
6584 | The `.syms' file is specific to the host machine on which GDB is run. | |
6585 | It holds an exact image of GDB's internal symbol table. It cannot be | |
6586 | shared across multiple host platforms. | |
6587 | ||
6588 | * longjmp() handling | |
6589 | ||
6590 | GDB is now capable of stepping and nexting over longjmp(), _longjmp(), and | |
6591 | siglongjmp() without losing control. This feature has not yet been ported to | |
6592 | all systems. It currently works on many 386 platforms, all MIPS-based | |
6593 | platforms (SGI, DECstation, etc), and Sun3/4. | |
6594 | ||
6595 | * Solaris 2.0 | |
6596 | ||
6597 | Preliminary work has been put in to support the new Solaris OS from Sun. At | |
6598 | this time, it can control and debug processes, but it is not capable of | |
6599 | reading symbols. | |
6600 | ||
6601 | * Bug fixes | |
6602 | ||
6603 | As always, many many bug fixes. The major areas were with g++, and mipsread. | |
6604 | People using the MIPS-based platforms should experience fewer mysterious | |
6605 | crashes and trashed symbol tables. | |
6606 | ||
6607 | *** Changes in GDB-4.4: | |
6608 | ||
6609 | * New machines supported (host and target) | |
6610 | ||
6611 | SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco | |
6612 | (except core files) | |
6613 | BSD Reno on Vax vax-dec-bsd | |
6614 | Ultrix on Vax vax-dec-ultrix | |
6615 | ||
6616 | * New machines supported (target) | |
6617 | ||
6618 | AMD 29000 embedded, using EBMON a29k-none-none | |
6619 | ||
6620 | * C++ support | |
6621 | ||
6622 | GDB continues to improve its handling of C++. `References' work better. | |
6623 | The demangler has also been improved, and now deals with symbols mangled as | |
6624 | per the Annotated C++ Reference Guide. | |
6625 | ||
6626 | GDB also now handles `stabs' symbol information embedded in MIPS | |
6627 | `ecoff' symbol tables. Since the ecoff format was not easily | |
6628 | extensible to handle new languages such as C++, this appeared to be a | |
6629 | good way to put C++ debugging info into MIPS binaries. This option | |
6630 | will be supported in the GNU C compiler, version 2, when it is | |
6631 | released. | |
6632 | ||
6633 | * New features for SVR4 | |
6634 | ||
6635 | GDB now handles SVR4 shared libraries, in the same fashion as SunOS | |
6636 | shared libraries. Debugging dynamically linked programs should present | |
6637 | only minor differences from debugging statically linked programs. | |
6638 | ||
6639 | The `info proc' command will print out information about any process | |
6640 | on an SVR4 system (including the one you are debugging). At the moment, | |
6641 | it prints the address mappings of the process. | |
6642 | ||
6643 | If you bring up GDB on another SVR4 system, please send mail to | |
6644 | bug-gdb@prep.ai.mit.edu to let us know what changes were reqired (if any). | |
6645 | ||
6646 | * Better dynamic linking support in SunOS | |
6647 | ||
6648 | Reading symbols from shared libraries which contain debugging symbols | |
6649 | now works properly. However, there remain issues such as automatic | |
6650 | skipping of `transfer vector' code during function calls, which | |
6651 | make it harder to debug code in a shared library, than to debug the | |
6652 | same code linked statically. | |
6653 | ||
6654 | * New Getopt | |
6655 | ||
6656 | GDB is now using the latest `getopt' routines from the FSF. This | |
6657 | version accepts the -- prefix for options with long names. GDB will | |
6658 | continue to accept the old forms (-option and +option) as well. | |
6659 | Various single letter abbreviations for options have been explicity | |
6660 | added to the option table so that they won't get overshadowed in the | |
6661 | future by other options that begin with the same letter. | |
6662 | ||
6663 | * Bugs fixed | |
6664 | ||
6665 | The `cleanup_undefined_types' bug that many of you noticed has been squashed. | |
6666 | Many assorted bugs have been handled. Many more remain to be handled. | |
6667 | See the various ChangeLog files (primarily in gdb and bfd) for details. | |
6668 | ||
6669 | ||
6670 | *** Changes in GDB-4.3: | |
6671 | ||
6672 | * New machines supported (host and target) | |
6673 | ||
6674 | Amiga 3000 running Amix m68k-cbm-svr4 or amix | |
6675 | NCR 3000 386 running SVR4 i386-ncr-svr4 or ncr3000 | |
6676 | Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88 | |
6677 | ||
6678 | * Almost SCO Unix support | |
6679 | ||
6680 | We had hoped to support: | |
6681 | SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco | |
6682 | (except for core file support), but we discovered very late in the release | |
6683 | that it has problems with process groups that render gdb unusable. Sorry | |
6684 | about that. I encourage people to fix it and post the fixes. | |
6685 | ||
6686 | * Preliminary ELF and DWARF support | |
6687 | ||
6688 | GDB can read ELF object files on System V Release 4, and can handle | |
6689 | debugging records for C, in DWARF format, in ELF files. This support | |
6690 | is preliminary. If you bring up GDB on another SVR4 system, please | |
6691 | send mail to bug-gdb@prep.ai.mit.edu to let us know what changes were | |
6692 | reqired (if any). | |
6693 | ||
6694 | * New Readline | |
6695 | ||
6696 | GDB now uses the latest `readline' library. One user-visible change | |
6697 | is that two tabs will list possible command completions, which previously | |
6698 | required typing M-? (meta-question mark, or ESC ?). | |
6699 | ||
6700 | * Bugs fixed | |
6701 | ||
6702 | The `stepi' bug that many of you noticed has been squashed. | |
6703 | Many bugs in C++ have been handled. Many more remain to be handled. | |
6704 | See the various ChangeLog files (primarily in gdb and bfd) for details. | |
6705 | ||
6706 | * State of the MIPS world (in case you wondered): | |
6707 | ||
6708 | GDB can understand the symbol tables emitted by the compilers | |
6709 | supplied by most vendors of MIPS-based machines, including DEC. These | |
6710 | symbol tables are in a format that essentially nobody else uses. | |
6711 | ||
6712 | Some versions of gcc come with an assembler post-processor called | |
6713 | mips-tfile. This program is required if you want to do source-level | |
6714 | debugging of gcc-compiled programs. I believe FSF does not ship | |
6715 | mips-tfile with gcc version 1, but it will eventually come with gcc | |
6716 | version 2. | |
6717 | ||
6718 | Debugging of g++ output remains a problem. g++ version 1.xx does not | |
6719 | really support it at all. (If you're lucky, you should be able to get | |
6720 | line numbers and stack traces to work, but no parameters or local | |
6721 | variables.) With some work it should be possible to improve the | |
6722 | situation somewhat. | |
6723 | ||
6724 | When gcc version 2 is released, you will have somewhat better luck. | |
6725 | However, even then you will get confusing results for inheritance and | |
6726 | methods. | |
6727 | ||
6728 | We will eventually provide full debugging of g++ output on | |
6729 | DECstations. This will probably involve some kind of stabs-in-ecoff | |
6730 | encapulation, but the details have not been worked out yet. | |
6731 | ||
6732 | ||
6733 | *** Changes in GDB-4.2: | |
6734 | ||
6735 | * Improved configuration | |
6736 | ||
6737 | Only one copy of `configure' exists now, and it is not self-modifying. | |
6738 | Porting BFD is simpler. | |
6739 | ||
6740 | * Stepping improved | |
6741 | ||
6742 | The `step' and `next' commands now only stop at the first instruction | |
6743 | of a source line. This prevents the multiple stops that used to occur | |
6744 | in switch statements, for-loops, etc. `Step' continues to stop if a | |
6745 | function that has debugging information is called within the line. | |
6746 | ||
6747 | * Bug fixing | |
6748 | ||
6749 | Lots of small bugs fixed. More remain. | |
6750 | ||
6751 | * New host supported (not target) | |
6752 | ||
6753 | Intel 386 PC clone running Mach i386-none-mach | |
6754 | ||
6755 | ||
6756 | *** Changes in GDB-4.1: | |
6757 | ||
6758 | * Multiple source language support | |
6759 | ||
6760 | GDB now has internal scaffolding to handle several source languages. | |
6761 | It determines the type of each source file from its filename extension, | |
6762 | and will switch expression parsing and number formatting to match the | |
6763 | language of the function in the currently selected stack frame. | |
6764 | You can also specifically set the language to be used, with | |
6765 | `set language c' or `set language modula-2'. | |
6766 | ||
6767 | * GDB and Modula-2 | |
6768 | ||
6769 | GDB now has preliminary support for the GNU Modula-2 compiler, | |
6770 | currently under development at the State University of New York at | |
6771 | Buffalo. Development of both GDB and the GNU Modula-2 compiler will | |
6772 | continue through the fall of 1991 and into 1992. | |
6773 | ||
6774 | Other Modula-2 compilers are currently not supported, and attempting to | |
6775 | debug programs compiled with them will likely result in an error as the | |
6776 | symbol table is read. Feel free to work on it, though! | |
6777 | ||
6778 | There are hooks in GDB for strict type checking and range checking, | |
6779 | in the `Modula-2 philosophy', but they do not currently work. | |
6780 | ||
6781 | * set write on/off | |
6782 | ||
6783 | GDB can now write to executable and core files (e.g. patch | |
6784 | a variable's value). You must turn this switch on, specify | |
6785 | the file ("exec foo" or "core foo"), *then* modify it, e.g. | |
6786 | by assigning a new value to a variable. Modifications take | |
6787 | effect immediately. | |
6788 | ||
6789 | * Automatic SunOS shared library reading | |
6790 | ||
6791 | When you run your program, GDB automatically determines where its | |
6792 | shared libraries (if any) have been loaded, and reads their symbols. | |
6793 | The `share' command is no longer needed. This also works when | |
6794 | examining core files. | |
6795 | ||
6796 | * set listsize | |
6797 | ||
6798 | You can specify the number of lines that the `list' command shows. | |
6799 | The default is 10. | |
6800 | ||
6801 | * New machines supported (host and target) | |
6802 | ||
6803 | SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris | |
6804 | Sony NEWS (68K) running NEWSOS 3.x: m68k-sony-sysv or news | |
6805 | Ultracomputer (29K) running Sym1: a29k-nyu-sym1 or ultra3 | |
6806 | ||
6807 | * New hosts supported (not targets) | |
6808 | ||
6809 | IBM RT/PC: romp-ibm-aix or rtpc | |
6810 | ||
6811 | * New targets supported (not hosts) | |
6812 | ||
6813 | AMD 29000 embedded with COFF a29k-none-coff | |
6814 | AMD 29000 embedded with a.out a29k-none-aout | |
6815 | Ultracomputer remote kernel debug a29k-nyu-kern | |
6816 | ||
6817 | * New remote interfaces | |
6818 | ||
6819 | AMD 29000 Adapt | |
6820 | AMD 29000 Minimon | |
6821 | ||
6822 | ||
6823 | *** Changes in GDB-4.0: | |
6824 | ||
6825 | * New Facilities | |
6826 | ||
6827 | Wide output is wrapped at good places to make the output more readable. | |
6828 | ||
6829 | Gdb now supports cross-debugging from a host machine of one type to a | |
6830 | target machine of another type. Communication with the target system | |
6831 | is over serial lines. The ``target'' command handles connecting to the | |
6832 | remote system; the ``load'' command will download a program into the | |
6833 | remote system. Serial stubs for the m68k and i386 are provided. Gdb | |
6834 | also supports debugging of realtime processes running under VxWorks, | |
6835 | using SunRPC Remote Procedure Calls over TCP/IP to talk to a debugger | |
6836 | stub on the target system. | |
6837 | ||
6838 | New CPUs supported include the AMD 29000 and Intel 960. | |
6839 | ||
6840 | GDB now reads object files and symbol tables via a ``binary file'' | |
6841 | library, which allows a single copy of GDB to debug programs of multiple | |
6842 | object file types such as a.out and coff. | |
6843 | ||
6844 | There is now a GDB reference card in "doc/refcard.tex". (Make targets | |
6845 | refcard.dvi and refcard.ps are available to format it). | |
6846 | ||
6847 | ||
6848 | * Control-Variable user interface simplified | |
6849 | ||
6850 | All variables that control the operation of the debugger can be set | |
6851 | by the ``set'' command, and displayed by the ``show'' command. | |
6852 | ||
6853 | For example, ``set prompt new-gdb=>'' will change your prompt to new-gdb=>. | |
6854 | ``Show prompt'' produces the response: | |
6855 | Gdb's prompt is new-gdb=>. | |
6856 | ||
6857 | What follows are the NEW set commands. The command ``help set'' will | |
6858 | print a complete list of old and new set commands. ``help set FOO'' | |
6859 | will give a longer description of the variable FOO. ``show'' will show | |
6860 | all of the variable descriptions and their current settings. | |
6861 | ||
6862 | confirm on/off: Enables warning questions for operations that are | |
6863 | hard to recover from, e.g. rerunning the program while | |
6864 | it is already running. Default is ON. | |
6865 | ||
6866 | editing on/off: Enables EMACS style command line editing | |
6867 | of input. Previous lines can be recalled with | |
6868 | control-P, the current line can be edited with control-B, | |
6869 | you can search for commands with control-R, etc. | |
6870 | Default is ON. | |
6871 | ||
6872 | history filename NAME: NAME is where the gdb command history | |
6873 | will be stored. The default is .gdb_history, | |
6874 | or the value of the environment variable | |
6875 | GDBHISTFILE. | |
6876 | ||
6877 | history size N: The size, in commands, of the command history. The | |
6878 | default is 256, or the value of the environment variable | |
6879 | HISTSIZE. | |
6880 | ||
6881 | history save on/off: If this value is set to ON, the history file will | |
6882 | be saved after exiting gdb. If set to OFF, the | |
6883 | file will not be saved. The default is OFF. | |
6884 | ||
6885 | history expansion on/off: If this value is set to ON, then csh-like | |
6886 | history expansion will be performed on | |
6887 | command line input. The default is OFF. | |
6888 | ||
6889 | radix N: Sets the default radix for input and output. It can be set | |
6890 | to 8, 10, or 16. Note that the argument to "radix" is interpreted | |
6891 | in the current radix, so "set radix 10" is always a no-op. | |
6892 | ||
6893 | height N: This integer value is the number of lines on a page. Default | |
6894 | is 24, the current `stty rows'' setting, or the ``li#'' | |
6895 | setting from the termcap entry matching the environment | |
6896 | variable TERM. | |
6897 | ||
6898 | width N: This integer value is the number of characters on a line. | |
6899 | Default is 80, the current `stty cols'' setting, or the ``co#'' | |
6900 | setting from the termcap entry matching the environment | |
6901 | variable TERM. | |
6902 | ||
6903 | Note: ``set screensize'' is obsolete. Use ``set height'' and | |
6904 | ``set width'' instead. | |
6905 | ||
6906 | print address on/off: Print memory addresses in various command displays, | |
6907 | such as stack traces and structure values. Gdb looks | |
6908 | more ``symbolic'' if you turn this off; it looks more | |
6909 | ``machine level'' with it on. Default is ON. | |
6910 | ||
6911 | print array on/off: Prettyprint arrays. New convenient format! Default | |
6912 | is OFF. | |
6913 | ||
6914 | print demangle on/off: Print C++ symbols in "source" form if on, | |
6915 | "raw" form if off. | |
6916 | ||
6917 | print asm-demangle on/off: Same, for assembler level printouts | |
6918 | like instructions. | |
6919 | ||
6920 | print vtbl on/off: Prettyprint C++ virtual function tables. Default is OFF. | |
6921 | ||
6922 | ||
6923 | * Support for Epoch Environment. | |
6924 | ||
6925 | The epoch environment is a version of Emacs v18 with windowing. One | |
6926 | new command, ``inspect'', is identical to ``print'', except that if you | |
6927 | are running in the epoch environment, the value is printed in its own | |
6928 | window. | |
6929 | ||
6930 | ||
6931 | * Support for Shared Libraries | |
6932 | ||
6933 | GDB can now debug programs and core files that use SunOS shared libraries. | |
6934 | Symbols from a shared library cannot be referenced | |
6935 | before the shared library has been linked with the program (this | |
6936 | happens after you type ``run'' and before the function main() is entered). | |
6937 | At any time after this linking (including when examining core files | |
6938 | from dynamically linked programs), gdb reads the symbols from each | |
6939 | shared library when you type the ``sharedlibrary'' command. | |
6940 | It can be abbreviated ``share''. | |
6941 | ||
6942 | sharedlibrary REGEXP: Load shared object library symbols for files | |
6943 | matching a unix regular expression. No argument | |
6944 | indicates to load symbols for all shared libraries. | |
6945 | ||
6946 | info sharedlibrary: Status of loaded shared libraries. | |
6947 | ||
6948 | ||
6949 | * Watchpoints | |
6950 | ||
6951 | A watchpoint stops execution of a program whenever the value of an | |
6952 | expression changes. Checking for this slows down execution | |
6953 | tremendously whenever you are in the scope of the expression, but is | |
6954 | quite useful for catching tough ``bit-spreader'' or pointer misuse | |
6955 | problems. Some machines such as the 386 have hardware for doing this | |
6956 | more quickly, and future versions of gdb will use this hardware. | |
6957 | ||
6958 | watch EXP: Set a watchpoint (breakpoint) for an expression. | |
6959 | ||
6960 | info watchpoints: Information about your watchpoints. | |
6961 | ||
6962 | delete N: Deletes watchpoint number N (same as breakpoints). | |
6963 | disable N: Temporarily turns off watchpoint number N (same as breakpoints). | |
6964 | enable N: Re-enables watchpoint number N (same as breakpoints). | |
6965 | ||
6966 | ||
6967 | * C++ multiple inheritance | |
6968 | ||
6969 | When used with a GCC version 2 compiler, GDB supports multiple inheritance | |
6970 | for C++ programs. | |
6971 | ||
6972 | * C++ exception handling | |
6973 | ||
6974 | Gdb now supports limited C++ exception handling. Besides the existing | |
6975 | ability to breakpoint on an exception handler, gdb can breakpoint on | |
6976 | the raising of an exception (before the stack is peeled back to the | |
6977 | handler's context). | |
6978 | ||
6979 | catch FOO: If there is a FOO exception handler in the dynamic scope, | |
6980 | set a breakpoint to catch exceptions which may be raised there. | |
6981 | Multiple exceptions (``catch foo bar baz'') may be caught. | |
6982 | ||
6983 | info catch: Lists all exceptions which may be caught in the | |
6984 | current stack frame. | |
6985 | ||
6986 | ||
6987 | * Minor command changes | |
6988 | ||
6989 | The command ``call func (arg, arg, ...)'' now acts like the print | |
6990 | command, except it does not print or save a value if the function's result | |
6991 | is void. This is similar to dbx usage. | |
6992 | ||
6993 | The ``up'' and ``down'' commands now always print the frame they end up | |
6994 | at; ``up-silently'' and `down-silently'' can be used in scripts to change | |
6995 | frames without printing. | |
6996 | ||
6997 | * New directory command | |
6998 | ||
6999 | 'dir' now adds directories to the FRONT of the source search path. | |
7000 | The path starts off empty. Source files that contain debug information | |
7001 | about the directory in which they were compiled can be found even | |
7002 | with an empty path; Sun CC and GCC include this information. If GDB can't | |
7003 | find your source file in the current directory, type "dir .". | |
7004 | ||
7005 | * Configuring GDB for compilation | |
7006 | ||
7007 | For normal use, type ``./configure host''. See README or gdb.texinfo | |
7008 | for more details. | |
7009 | ||
7010 | GDB now handles cross debugging. If you are remotely debugging between | |
7011 | two different machines, type ``./configure host -target=targ''. | |
7012 | Host is the machine where GDB will run; targ is the machine | |
7013 | where the program that you are debugging will run. |