Fix typo in "show remotelogfile" docs
[deliverable/binutils-gdb.git] / gdb / NEWS
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1 What has changed in GDB?
2 (Organized release by release)
3
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4*** Changes since GDB 8.2
5
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6* GDB and GDBserver now support access to additional registers on
7 PowerPC GNU/Linux targets: PPR, DSCR, TAR, EBB/PMU registers, and
8 HTM registers.
9
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10* GDB now has experimental support for the compilation and injection of
11 C++ source code into the inferior. This beta release does not include
12 support for several language features, such as templates, constructors,
13 and operators.
14
15 This feature requires GCC 7.1 or higher built with libcp1.so
16 (the C++ plug-in).
17
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18* GDB and GDBserver now support IPv6 connections. IPv6 addresses
19 can be passed using the '[ADDRESS]:PORT' notation, or the regular
20 'ADDRESS:PORT' method.
21
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22* DWARF index cache: GDB can now automatically save indices of DWARF
23 symbols on disk to speed up further loading of the same binaries.
24
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25* Ada task switching is now supported on aarch64-elf targets when
26 debugging a program using the Ravenscar Profile. For more information,
27 see the "Tasking Support when using the Ravenscar Profile" section
28 in the GDB user manual.
29
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30* GDB in batch mode now exits with status 1 if the last command to be
31 executed failed.
32
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33* The RISC-V target now supports target descriptions.
34
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35* System call catchpoints now support system call aliases on FreeBSD.
36 When the ABI of a system call changes in FreeBSD, this is
37 implemented by leaving a compatibility system call using the old ABI
38 at the existing number and allocating a new system call number for
39 the new ABI. For example, FreeBSD 12 altered the layout of 'struct
40 kevent' used by the 'kevent' system call. As a result, FreeBSD 12
41 kernels ship with both 'kevent' and 'freebsd11_kevent' system calls.
42 The 'freebsd11_kevent' system call is assigned an alias of 'kevent'
43 so that a system call catchpoint for the 'kevent' system call will
44 catch invocations of both the 'kevent' and 'freebsd11_kevent'
45 binaries. This ensures that 'kevent' system calls are caught for
46 binaries using either the old or new ABIs.
47
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48* Terminal styling is now available for the CLI and the TUI. GNU
49 Source Highlight can additionally be used to provide styling of
50 source code snippets. See the "set style" commands, below, for more
51 information.
52
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53* Removed support for old demangling styles arm, edg, gnu, hp and
54 lucid.
55
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56* New targets
57
58 NXP S12Z s12z-*-elf
66ac1ae9 59 GNU/Linux/OpenRISC or1k*-*-linux*
51d21d60 60
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61* New commands
62
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63set debug compile-cplus-types
64show debug compile-cplus-types
65 Control the display of debug output about type conversion in the
66 C++ compile feature. Commands have no effect while compiliong
67 for other languages.
68
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69set debug skip
70show debug skip
71 Control whether debug output about files/functions skipping is
72 displayed.
73
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74frame apply [all | COUNT | -COUNT | level LEVEL...] [FLAG]... COMMAND
75 Apply a command to some frames.
76 FLAG arguments allow to control what output to produce and how to handle
77 errors raised when applying COMMAND to a frame.
78
79taas COMMAND
80 Apply a command to all threads (ignoring errors and empty output).
81 Shortcut for 'thread apply all -s COMMAND'.
82
83faas COMMAND
84 Apply a command to all frames (ignoring errors and empty output).
85 Shortcut for 'frame apply all -s COMMAND'.
86
87tfaas COMMAND
88 Apply a command to all frames of all threads (ignoring errors and empty
89 output).
90 Shortcut for 'thread apply all -s frame apply all -s COMMAND'.
91
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92maint set dwarf unwinders (on|off)
93maint show dwarf unwinders
94 Control whether DWARF unwinders can be used.
95
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96info proc files
97 Display a list of open files for a process.
98
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99* Changed commands
100
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101Changes to the "frame", "select-frame", and "info frame" CLI commands.
102 These commands all now take a frame specification which
103 is either a frame level, or one of the keywords 'level', 'address',
104 'function', or 'view' followed by a parameter. Selecting a frame by
105 address, or viewing a frame outside the current backtrace now
106 requires the use of a keyword. Selecting a frame by level is
107 unchanged. The MI comment "-stack-select-frame" is unchanged.
108
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109target remote FILENAME
110target extended-remote FILENAME
111 If FILENAME is a Unix domain socket, GDB will attempt to connect
112 to this socket instead of opening FILENAME as a character device.
113
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114info args [-q] [-t TYPEREGEXP] [NAMEREGEXP]
115info functions [-q] [-t TYPEREGEXP] [NAMEREGEXP]
116info locals [-q] [-t TYPEREGEXP] [NAMEREGEXP]
117info variables [-q] [-t TYPEREGEXP] [NAMEREGEXP]
118 These commands can now print only the searched entities
119 matching the provided regexp(s), giving a condition
120 on the entity names or entity types. The flag -q disables
121 printing headers or informations messages.
122
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123info functions
124info types
125info variables
126rbreak
127 These commands now determine the syntax for the shown entities
128 according to the language chosen by `set language'. In particular,
129 `set language auto' means to automatically choose the language of
130 the shown entities.
131
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132thread apply [all | COUNT | -COUNT] [FLAG]... COMMAND
133 The 'thread apply' command accepts new FLAG arguments.
134 FLAG arguments allow to control what output to produce and how to handle
135 errors raised when applying COMMAND to a thread.
136
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137set tui tab-width NCHARS
138show tui tab-width NCHARS
139 "set tui tab-width" replaces the "tabset" command, which has been deprecated.
140
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141set style enabled [on|off]
142show style enabled
143 Enable or disable terminal styling. Styling is enabled by default
144 on most hosts.
145
146set style filename foreground COLOR
147set style filename background COLOR
148set style filename intensity VALUE
149 Control the styling of file names.
150
151set style function foreground COLOR
152set style function background COLOR
153set style function intensity VALUE
154 Control the styling of function names.
155
156set style variable foreground COLOR
157set style variable background COLOR
158set style variable intensity VALUE
159 Control the styling of variable names.
160
161set style address foreground COLOR
162set style address background COLOR
163set style address intensity VALUE
164 Control the styling of addresses.
165
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166* MI changes
167
168 ** The '-data-disassemble' MI command now accepts an '-a' option to
169 disassemble the whole function surrounding the given program
170 counter value or function name. Support for this feature can be
171 verified by using the "-list-features" command, which should
172 contain "data-disassemble-a-option".
173
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174 ** Command responses and notifications that include a frame now include
175 the frame's architecture in a new "arch" attribute.
176
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177* New native configurations
178
179GNU/Linux/RISC-V riscv*-*-linux*
74792ff7 180FreeBSD/riscv riscv*-*-freebsd*
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181
182* New targets
183
184GNU/Linux/RISC-V riscv*-*-linux*
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185CSKY ELF csky*-*-elf
186CSKY GNU/LINUX csky*-*-linux
ed65e20b 187FreeBSD/riscv riscv*-*-freebsd*
52a187f8 188
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189* Python API
190
191 ** The gdb.Inferior type has a new 'progspace' property, which is the program
192 space associated to that inferior.
193
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194 ** The gdb.Progspace type has a new 'objfiles' method, which returns the list
195 of objfiles associated to that program space.
196
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197 ** gdb.SYMBOL_LOC_COMMON_BLOCK, gdb.SYMBOL_MODULE_DOMAIN, and
198 gdb.SYMBOL_COMMON_BLOCK_DOMAIN were added to reflect changes to
199 the gdb core.
200
201 ** gdb.SYMBOL_VARIABLES_DOMAIN, gdb.SYMBOL_FUNCTIONS_DOMAIN, and
202 gdb.SYMBOL_TYPES_DOMAIN are now deprecated. These were never
203 correct and did not work properly.
204
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205* Configure changes
206
207--enable-ubsan
208
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209 Enable or disable the undefined behavior sanitizer. This is
210 disabled by default, but passing --enable-ubsan=yes or
211 --enable-ubsan=auto to configure will enable it. Enabling this can
212 cause a performance penalty. The undefined behavior sanitizer was
213 first introduced in GCC 4.9.
f35d5ade 214
4e5b2f89 215*** Changes in GDB 8.2
cd385f94 216
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217* The 'set disassembler-options' command now supports specifying options
218 for the MIPS target.
219
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220* The 'symbol-file' command now accepts an '-o' option to add a relative
221 offset to all sections.
222
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223* Similarly, the 'add-symbol-file' command also accepts an '-o' option to add
224 a relative offset to all sections, but it allows to override the load
225 address of individual sections using '-s'.
226
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227* The 'add-symbol-file' command no longer requires the second argument
228 (address of the text section).
229
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230* The endianness used with the 'set endian auto' mode in the absence of
231 an executable selected for debugging is now the last endianness chosen
232 either by one of the 'set endian big' and 'set endian little' commands
233 or by inferring from the last executable used, rather than the startup
234 default.
235
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236* The pager now allows a "c" response, meaning to disable the pager
237 for the rest of the current command.
238
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239* The commands 'info variables/functions/types' now show the source line
240 numbers of symbol definitions when available.
241
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242* 'info proc' now works on running processes on FreeBSD systems and core
243 files created on FreeBSD systems.
244
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245* C expressions can now use _Alignof, and C++ expressions can now use
246 alignof.
247
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248* Support for SVE on AArch64 Linux. Note that GDB does not detect changes to
249 the vector length while the process is running.
250
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251* New commands
252
253set debug fbsd-nat
254show debug fbsd-nat
255 Control display of debugging info regarding the FreeBSD native target.
256
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257set|show varsize-limit
258 This new setting allows the user to control the maximum size of Ada
259 objects being printed when those objects have a variable type,
260 instead of that maximum size being hardcoded to 65536 bytes.
261
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262set|show record btrace cpu
263 Controls the processor to be used for enabling errata workarounds for
264 branch trace decode.
265
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266maint check libthread-db
267 Run integrity checks on the current inferior's thread debugging
268 library
269
270maint set check-libthread-db (on|off)
271maint show check-libthread-db
272 Control whether to run integrity checks on inferior specific thread
273 debugging libraries as they are loaded. The default is not to
274 perform such checks.
275
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276* Python API
277
278 ** Type alignment is now exposed via the "align" attribute of a gdb.Type.
279
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280 ** The commands attached to a breakpoint can be set by assigning to
281 the breakpoint's "commands" field.
282
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283 ** gdb.execute can now execute multi-line gdb commands.
284
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285 ** The new functions gdb.convenience_variable and
286 gdb.set_convenience_variable can be used to get and set the value
287 of convenience variables.
288
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289 ** A gdb.Parameter will no longer print the "set" help text on an
290 ordinary "set"; instead by default a "set" will be silent unless
291 the get_set_string method returns a non-empty string.
292
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293* New targets
294
295RiscV ELF riscv*-*-elf
296
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297* Removed targets and native configurations
298
299m88k running OpenBSD m88*-*-openbsd*
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300SH-5/SH64 ELF sh64-*-elf*, SH-5/SH64 support in sh*
301SH-5/SH64 running GNU/Linux SH-5/SH64 support in sh*-*-linux*
302SH-5/SH64 running OpenBSD SH-5/SH64 support in sh*-*-openbsd*
a2a79012 303
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304* Aarch64/Linux hardware watchpoints improvements
305
306 Hardware watchpoints on unaligned addresses are now properly
307 supported when running Linux kernel 4.10 or higher: read and access
308 watchpoints are no longer spuriously missed, and all watchpoints
309 lengths between 1 and 8 bytes are supported. On older kernels,
310 watchpoints set on unaligned addresses are no longer missed, with
311 the tradeoff that there is a possibility of false hits being
312 reported.
313
056dec39 314* Configure changes
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315
316--enable-codesign=CERT
317 This can be used to invoke "codesign -s CERT" after building gdb.
318 This option is useful on macOS, where code signing is required for
319 gdb to work properly.
320
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321--disable-gdbcli has been removed
322 This is now silently accepted, but does nothing.
323
cd385f94 324*** Changes in GDB 8.1
305d16a9 325
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326* GDB now supports dynamically creating arbitrary register groups specified
327 in XML target descriptions. This allows for finer grain grouping of
328 registers on systems with a large amount of registers.
329
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330* The 'ptype' command now accepts a '/o' flag, which prints the
331 offsets and sizes of fields in a struct, like the pahole(1) tool.
332
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333* New "--readnever" command line option instructs GDB to not read each
334 symbol file's symbolic debug information. This makes startup faster
335 but at the expense of not being able to perform symbolic debugging.
336 This option is intended for use cases where symbolic debugging will
337 not be used, e.g., when you only need to dump the debuggee's core.
338
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339* GDB now uses the GNU MPFR library, if available, to emulate target
340 floating-point arithmetic during expression evaluation when the target
341 uses different floating-point formats than the host. At least version
342 3.1 of GNU MPFR is required.
343
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344* GDB now supports access to the guarded-storage-control registers and the
345 software-based guarded-storage broadcast control registers on IBM z14.
346
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347* On Unix systems, GDB now supports transmitting environment variables
348 that are to be set or unset to GDBserver. These variables will
349 affect the environment to be passed to the remote inferior.
350
351 To inform GDB of environment variables that are to be transmitted to
352 GDBserver, use the "set environment" command. Only user set
353 environment variables are sent to GDBserver.
354
355 To inform GDB of environment variables that are to be unset before
356 the remote inferior is started by the GDBserver, use the "unset
357 environment" command.
358
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359* Completion improvements
360
361 ** GDB can now complete function parameters in linespecs and
362 explicit locations without quoting. When setting breakpoints,
363 quoting around functions names to help with TAB-completion is
364 generally no longer necessary. For example, this now completes
365 correctly:
366
367 (gdb) b function(in[TAB]
368 (gdb) b function(int)
369
370 Related, GDB is no longer confused with completing functions in
371 C++ anonymous namespaces:
372
373 (gdb) b (anon[TAB]
374 (gdb) b (anonymous namespace)::[TAB][TAB]
375 (anonymous namespace)::a_function()
376 (anonymous namespace)::b_function()
377
378 ** GDB now has much improved linespec and explicit locations TAB
379 completion support, that better understands what you're
380 completing and offers better suggestions. For example, GDB no
381 longer offers data symbols as possible completions when you're
382 setting a breakpoint.
383
384 ** GDB now TAB-completes label symbol names.
385
386 ** The "complete" command now mimics TAB completion accurately.
387
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388* New command line options (gcore)
389
390-a
391 Dump all memory mappings.
392
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393* Breakpoints on C++ functions are now set on all scopes by default
394
395 By default, breakpoints on functions/methods are now interpreted as
396 specifying all functions with the given name ignoring missing
397 leading scopes (namespaces and classes).
398
399 For example, assuming a C++ program with symbols named:
400
401 A::B::func()
402 B::func()
403
404 both commands "break func()" and "break B::func()" set a breakpoint
405 on both symbols.
406
407 You can use the new flag "-qualified" to override this. This makes
408 GDB interpret the specified function name as a complete
409 fully-qualified name instead. For example, using the same C++
410 program, the "break -q B::func" command sets a breakpoint on
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411 "B::func", only. A parameter has been added to the Python
412 gdb.Breakpoint constructor to achieve the same result when creating
413 a breakpoint from Python.
a20714ff 414
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415* Breakpoints on functions marked with C++ ABI tags
416
417 GDB can now set breakpoints on functions marked with C++ ABI tags
418 (e.g., [abi:cxx11]). See here for a description of ABI tags:
419 https://developers.redhat.com/blog/2015/02/05/gcc5-and-the-c11-abi/
420
421 Functions with a C++11 abi tag are demangled/displayed like this:
422
423 function[abi:cxx11](int)
424 ^^^^^^^^^^^
425
426 You can now set a breakpoint on such functions simply as if they had
427 no tag, like:
428
429 (gdb) b function(int)
430
431 Or if you need to disambiguate between tags, like:
432
433 (gdb) b function[abi:other_tag](int)
434
435 Tab completion was adjusted accordingly as well.
436
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437* Python Scripting
438
439 ** New events gdb.new_inferior, gdb.inferior_deleted, and
440 gdb.new_thread are emitted. See the manual for further
441 description of these.
442
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443 ** A new function, "gdb.rbreak" has been added to the Python API.
444 This function allows the setting of a large number of breakpoints
445 via a regex pattern in Python. See the manual for further details.
d8ae99a7 446
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447 ** Python breakpoints can now accept explicit locations. See the
448 manual for a further description of this feature.
449
450
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451* New features in the GDB remote stub, GDBserver
452
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453 ** GDBserver is now able to start inferior processes with a
454 specified initial working directory.
455
456 The user can set the desired working directory to be used from
457 GDB using the new "set cwd" command.
458
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459 ** New "--selftest" command line option runs some GDBserver self
460 tests. These self tests are disabled in releases.
461
462 ** On Unix systems, GDBserver now does globbing expansion and variable
463 substitution in inferior command line arguments.
464
465 This is done by starting inferiors using a shell, like GDB does.
466 See "set startup-with-shell" in the user manual for how to disable
467 this from GDB when using "target extended-remote". When using
468 "target remote", you can disable the startup with shell by using the
469 new "--no-startup-with-shell" GDBserver command line option.
aefd8b33 470
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471 ** On Unix systems, GDBserver now supports receiving environment
472 variables that are to be set or unset from GDB. These variables
473 will affect the environment to be passed to the inferior.
474
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475* When catching an Ada exception raised with a message, GDB now prints
476 the message in the catchpoint hit notification. In GDB/MI mode, that
477 information is provided as an extra field named "exception-message"
478 in the *stopped notification.
479
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480* Trait objects can now be inspected When debugging Rust code. This
481 requires compiler support which will appear in Rust 1.24.
482
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483* New remote packets
484
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485QEnvironmentHexEncoded
486 Inform GDBserver of an environment variable that is to be passed to
487 the inferior when starting it.
488
489QEnvironmentUnset
490 Inform GDBserver of an environment variable that is to be unset
491 before starting the remote inferior.
492
493QEnvironmentReset
494 Inform GDBserver that the environment should be reset (i.e.,
495 user-set environment variables should be unset).
496
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497QStartupWithShell
498 Indicates whether the inferior must be started with a shell or not.
499
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500QSetWorkingDir
501 Tell GDBserver that the inferior to be started should use a specific
502 working directory.
503
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504* The "maintenance print c-tdesc" command now takes an optional
505 argument which is the file name of XML target description.
506
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507* The "maintenance selftest" command now takes an optional argument to
508 filter the tests to be run.
509
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510* The "enable", and "disable" commands now accept a range of
511 breakpoint locations, e.g. "enable 1.3-5".
512
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513* New commands
514
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515set|show cwd
516 Set and show the current working directory for the inferior.
517
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518set|show compile-gcc
519 Set and show compilation command used for compiling and injecting code
520 with the 'compile' commands.
521
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522set debug separate-debug-file
523show debug separate-debug-file
524 Control the display of debug output about separate debug file search.
525
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526set dump-excluded-mappings
527show dump-excluded-mappings
528 Control whether mappings marked with the VM_DONTDUMP flag should be
529 dumped when generating a core file.
530
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531maint info selftests
532 List the registered selftests.
533
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534starti
535 Start the debugged program stopping at the first instruction.
536
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537set|show debug or1k
538 Control display of debugging messages related to OpenRISC targets.
539
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540set|show print type nested-type-limit
541 Set and show the limit of nesting level for nested types that the
542 type printer will show.
543
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544* TUI Single-Key mode now supports two new shortcut keys: `i' for stepi and
545 `o' for nexti.
546
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547* Safer/improved support for debugging with no debug info
548
549 GDB no longer assumes functions with no debug information return
550 'int'.
551
552 This means that GDB now refuses to call such functions unless you
553 tell it the function's type, by either casting the call to the
554 declared return type, or by casting the function to a function
555 pointer of the right type, and calling that:
556
557 (gdb) p getenv ("PATH")
558 'getenv' has unknown return type; cast the call to its declared return type
559 (gdb) p (char *) getenv ("PATH")
560 $1 = 0x7fffffffe "/usr/local/bin:/"...
561 (gdb) p ((char * (*) (const char *)) getenv) ("PATH")
562 $2 = 0x7fffffffe "/usr/local/bin:/"...
563
564 Similarly, GDB no longer assumes that global variables with no debug
565 info have type 'int', and refuses to print the variable's value
566 unless you tell it the variable's type:
567
568 (gdb) p var
569 'var' has unknown type; cast it to its declared type
570 (gdb) p (float) var
571 $3 = 3.14
572
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573* New native configurations
574
575FreeBSD/aarch64 aarch64*-*-freebsd*
4f9d9906 576FreeBSD/arm arm*-*-freebsd*
351787dd 577
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578* New targets
579
580FreeBSD/aarch64 aarch64*-*-freebsd*
7176dfd2 581FreeBSD/arm arm*-*-freebsd*
b282f0f2 582OpenRISC ELF or1k*-*-elf
c0f84956 583
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584* Removed targets and native configurations
585
586Solaris 2.0-9 i?86-*-solaris2.[0-9], sparc*-*-solaris2.[0-9]
587
305d16a9 588*** Changes in GDB 8.0
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589
590* GDB now supports access to the PKU register on GNU/Linux. The register is
591 added by the Memory Protection Keys for Userspace feature which will be
592 available in future Intel CPUs.
751b375e 593
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594* GDB now supports C++11 rvalue references.
595
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596* Python Scripting
597
598 ** New functions to start, stop and access a running btrace recording.
c0f55cc6 599 ** Rvalue references are now supported in gdb.Type.
0a0faf9f 600
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601* GDB now supports recording and replaying rdrand and rdseed Intel 64
602 instructions.
603
e6485aaf 604* Building GDB and GDBserver now requires a C++11 compiler.
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605
606 For example, GCC 4.8 or later.
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607
608 It is no longer possible to build GDB or GDBserver with a C
609 compiler. The --disable-build-with-cxx configure option has been
610 removed.
611
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612* Building GDB and GDBserver now requires GNU make >= 3.81.
613
614 It is no longer supported to build GDB or GDBserver with another
615 implementation of the make program or an earlier version of GNU make.
616
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617* Native debugging on MS-Windows supports command-line redirection
618
619 Command-line arguments used for starting programs on MS-Windows can
620 now include redirection symbols supported by native Windows shells,
621 such as '<', '>', '>>', '2>&1', etc. This affects GDB commands such
622 as "run", "start", and "set args", as well as the corresponding MI
623 features.
624
24cdb46e
РИ
625* Support for thread names on MS-Windows.
626
627 GDB now catches and handles the special exception that programs
628 running on MS-Windows use to assign names to threads in the
629 debugger.
630
9c37b5ae
TT
631* Support for Java programs compiled with gcj has been removed.
632
df3ee9ca
PA
633* User commands now accept an unlimited number of arguments.
634 Previously, only up to 10 was accepted.
635
01770bbd
PA
636* The "eval" command now expands user-defined command arguments.
637
638 This makes it easier to process a variable number of arguments:
639
640 define mycommand
641 set $i = 0
642 while $i < $argc
643 eval "print $arg%d", $i
644 set $i = $i + 1
645 end
646 end
647
3f7b46f2
IR
648* Target descriptions can now describe registers for sparc32 and sparc64.
649
0ae60b63
JK
650* GDB now supports DWARF version 5 (debug information format).
651 Its .debug_names index is not yet supported.
652
b268007c
JB
653* New native configurations
654
655FreeBSD/mips mips*-*-freebsd
656
ad0a504f
AK
657* New targets
658
659Synopsys ARC arc*-*-elf32
387360da 660FreeBSD/mips mips*-*-freebsd
ad0a504f 661
db6be0d5
SM
662* Removed targets and native configurations
663
664Alpha running FreeBSD alpha*-*-freebsd*
665Alpha running GNU/kFreeBSD alpha*-*-kfreebsd*-gnu
666
78cbbba8
LM
667* New commands
668
669flash-erase
670 Erases all the flash memory regions reported by the target.
671
db6be0d5
SM
672maint print arc arc-instruction address
673 Print internal disassembler information about instruction at a given address.
51457a05 674
db6be0d5 675* New options
65b48a81
PB
676
677set disassembler-options
678show disassembler-options
679 Controls the passing of target specific information to the disassembler.
680 If it is necessary to specify more than one disassembler option then
681 multiple options can be placed together into a comma separated list.
682 The default value is the empty string. Currently, the only supported
683 targets are ARM, PowerPC and S/390.
684
db6be0d5 685* New MI commands
eea78757 686
db6be0d5
SM
687-target-flash-erase
688 Erases all the flash memory regions reported by the target. This is
689 equivalent to the CLI command flash-erase.
1e1a8bef 690
db6be0d5
SM
691-file-list-shared-libraries
692 List the shared libraries in the program. This is
693 equivalent to the CLI command "info shared".
1e1a8bef 694
bea298f9
XR
695-catch-handlers
696 Catchpoints stopping the program when Ada exceptions are
697 handled. This is equivalent to the CLI command "catch handlers".
698
751b375e 699*** Changes in GDB 7.12
1233c0ba 700
69ffd7f2
PA
701* GDB and GDBserver now build with a C++ compiler by default.
702
703 The --enable-build-with-cxx configure option is now enabled by
704 default. One must now explicitly configure with
705 --disable-build-with-cxx in order to build with a C compiler. This
706 option will be removed in a future release.
707
c0272db5
TW
708* GDBserver now supports recording btrace without maintaining an active
709 GDB connection.
710
bb556f1f
TK
711* GDB now supports a negative repeat count in the 'x' command to examine
712 memory backward from the given address. For example:
713
714 (gdb) bt
715 #0 Func1 (n=42, p=0x40061c "hogehoge") at main.cpp:4
716 #1 0x400580 in main (argc=1, argv=0x7fffffffe5c8) at main.cpp:8
717 (gdb) x/-5i 0x0000000000400580
718 0x40056a <main(int, char**)+8>: mov %edi,-0x4(%rbp)
719 0x40056d <main(int, char**)+11>: mov %rsi,-0x10(%rbp)
720 0x400571 <main(int, char**)+15>: mov $0x40061c,%esi
721 0x400576 <main(int, char**)+20>: mov $0x2a,%edi
722 0x40057b <main(int, char**)+25>:
723 callq 0x400536 <Func1(int, char const*)>
724
9920b434
BH
725* Fortran: Support structures with fields of dynamic types and
726 arrays of dynamic types.
727
34c41c68
DE
728* The symbol dumping maintenance commands have new syntax.
729maint print symbols [-pc address] [--] [filename]
730maint print symbols [-objfile objfile] [-source source] [--] [filename]
731maint print psymbols [-objfile objfile] [-pc address] [--] [filename]
732maint print psymbols [-objfile objfile] [-source source] [--] [filename]
733maint print msymbols [-objfile objfile] [--] [filename]
734
81516450
DE
735* GDB now supports multibit bitfields and enums in target register
736 descriptions.
737
f2f3ccb9
SM
738* New Python-based convenience function $_as_string(val), which returns
739 the textual representation of a value. This function is especially
740 useful to obtain the text label of an enum value.
741
012b3a21
WT
742* Intel MPX bound violation handling.
743
744 Segmentation faults caused by a Intel MPX boundary violation
745 now display the kind of violation (upper or lower), the memory
746 address accessed and the memory bounds, along with the usual
747 signal received and code location.
748
749 For example:
750
751 Program received signal SIGSEGV, Segmentation fault
752 Upper bound violation while accessing address 0x7fffffffc3b3
753 Bounds: [lower = 0x7fffffffc390, upper = 0x7fffffffc3a3]
754 0x0000000000400d7c in upper () at i386-mpx-sigsegv.c:68
755
0bdfa368
TT
756* Rust language support.
757 GDB now supports debugging programs written in the Rust programming
758 language. See https://www.rust-lang.org/ for more information about
759 Rust.
760
86f78169
PA
761* Support for running interpreters on specified input/output devices
762
763 GDB now supports a new mechanism that allows frontends to provide
764 fully featured GDB console views, as a better alternative to
765 building such views on top of the "-interpreter-exec console"
766 command. See the new "new-ui" command below. With that command,
767 frontends can now start GDB in the traditional command-line mode
768 running in an embedded terminal emulator widget, and create a
769 separate MI interpreter running on a specified i/o device. In this
770 way, GDB handles line editing, history, tab completion, etc. in the
771 console all by itself, and the GUI uses the separate MI interpreter
772 for its own control and synchronization, invisible to the command
773 line.
774
e3487908
GKB
775* The "catch syscall" command catches groups of related syscalls.
776
777 The "catch syscall" command now supports catching a group of related
778 syscalls using the 'group:' or 'g:' prefix.
779
d2dffb8d
DE
780* New commands
781
782skip -file file
783skip -gfile file-glob-pattern
784skip -function function
785skip -rfunction regular-expression
786 A generalized form of the skip command, with new support for
787 glob-style file names and regular expressions for function names.
788 Additionally, a file spec and a function spec may now be combined.
789
f2403c39
AB
790maint info line-table REGEXP
791 Display the contents of GDB's internal line table data struture.
792
dcd1f979
TT
793maint selftest
794 Run any GDB unit tests that were compiled in.
795
86f78169
PA
796new-ui INTERP TTY
797 Start a new user interface instance running INTERP as interpreter,
798 using the TTY file for input/output.
799
93daf339
TT
800* Python Scripting
801
802 ** gdb.Breakpoint objects have a new attribute "pending", which
803 indicates whether the breakpoint is pending.
8d2a0a14
TT
804 ** Three new breakpoint-related events have been added:
805 gdb.breakpoint_created, gdb.breakpoint_modified, and
806 gdb.breakpoint_deleted.
93daf339 807
463888ab
РИ
808signal-event EVENTID
809 Signal ("set") the given MS-Windows event object. This is used in
810 conjunction with the Windows JIT debugging (AeDebug) support, where
811 the OS suspends a crashing process until a debugger can attach to
812 it. Resuming the crashing process, in order to debug it, is done by
813 signalling an event.
814
c37c0ba6
MK
815* Support for tracepoints and fast tracepoints on s390-linux and s390x-linux
816 was added in GDBserver, including JIT compiling fast tracepoint's
817 conditional expression bytecode into native code.
818
f7c38292
PA
819* Support for various remote target protocols and ROM monitors has
820 been removed:
821
822 target m32rsdi Remote M32R debugging over SDI
823 target mips MIPS remote debugging protocol
824 target pmon PMON ROM monitor
825 target ddb NEC's DDB variant of PMON for Vr4300
826 target rockhopper NEC RockHopper variant of PMON
827 target lsi LSI variant of PMO
828
22084c42
MK
829* Support for tracepoints and fast tracepoints on powerpc-linux,
830 powerpc64-linux, and powerpc64le-linux was added in GDBserver,
831 including JIT compiling fast tracepoint's conditional expression
832 bytecode into native code.
833
38b022b4
SM
834* MI async record =record-started now includes the method and format used for
835 recording. For example:
836
837 =record-started,thread-group="i1",method="btrace",format="bts"
838
4034d0ff
AT
839* MI async record =thread-selected now includes the frame field. For example:
840
841 =thread-selected,id="3",frame={level="0",addr="0x00000000004007c0"}
842
a28d8e50
YTL
843* New targets
844
845Andes NDS32 nds32*-*-elf
846
1233c0ba 847*** Changes in GDB 7.11
7c79d316 848
6e9567fe
JB
849* GDB now supports debugging kernel-based threads on FreeBSD.
850
5d5658a1
PA
851* Per-inferior thread numbers
852
853 Thread numbers are now per inferior instead of global. If you're
854 debugging multiple inferiors, GDB displays thread IDs using a
855 qualified INF_NUM.THR_NUM form. For example:
856
857 (gdb) info threads
858 Id Target Id Frame
859 1.1 Thread 0x7ffff7fc2740 (LWP 8155) (running)
860 1.2 Thread 0x7ffff7fc1700 (LWP 8168) (running)
861 * 2.1 Thread 0x7ffff7fc2740 (LWP 8157) (running)
862 2.2 Thread 0x7ffff7fc1700 (LWP 8190) (running)
863
864 As consequence, thread numbers as visible in the $_thread
865 convenience variable and in Python's InferiorThread.num attribute
866 are no longer unique between inferiors.
867
868 GDB now maintains a second thread ID per thread, referred to as the
869 global thread ID, which is the new equivalent of thread numbers in
663f6d42 870 previous releases. See also $_gthread below.
5d5658a1
PA
871
872 For backwards compatibility, MI's thread IDs always refer to global
873 IDs.
874
875* Commands that accept thread IDs now accept the qualified
876 INF_NUM.THR_NUM form as well. For example:
877
878 (gdb) thread 2.1
879 [Switching to thread 2.1 (Thread 0x7ffff7fc2740 (LWP 8157))] (running)
880 (gdb)
881
71ef29a8
PA
882* In commands that accept a list of thread IDs, you can now refer to
883 all threads of an inferior using a star wildcard. GDB accepts
884 "INF_NUM.*", to refer to all threads of inferior INF_NUM, and "*" to
885 refer to all threads of the current inferior. For example, "info
886 threads 2.*".
887
c84f6bbf
PA
888* You can use "info threads -gid" to display the global thread ID of
889 all threads.
890
663f6d42
PA
891* The new convenience variable $_gthread holds the global number of
892 the current thread.
893
e3940304
PA
894* The new convenience variable $_inferior holds the number of the
895 current inferior.
896
f303dbd6
PA
897* GDB now displays the ID and name of the thread that hit a breakpoint
898 or received a signal, if your program is multi-threaded. For
899 example:
900
901 Thread 3 "bar" hit Breakpoint 1 at 0x40087a: file program.c, line 20.
902 Thread 1 "main" received signal SIGINT, Interrupt.
903
cbb55fa7
MM
904* Record btrace now supports non-stop mode.
905
58d2eda5
PL
906* Support for tracepoints on aarch64-linux was added in GDBserver.
907
da8c46d2 908* The 'record instruction-history' command now indicates speculative execution
bc504a31 909 when using the Intel Processor Trace recording format.
da8c46d2 910
629500fa
KS
911* GDB now allows users to specify explicit locations, bypassing
912 the linespec parser. This feature is also available to GDB/MI
913 clients.
914
02f024f9
YQ
915* Multi-architecture debugging is supported on AArch64 GNU/Linux.
916 GDB now is able to debug both AArch64 applications and ARM applications
917 at the same time.
918
4d9d419e
PL
919* Support for fast tracepoints on aarch64-linux was added in GDBserver,
920 including JIT compiling fast tracepoint's conditional expression bytecode
921 into native code.
922
eda14cf2
YQ
923* GDB now supports displaced stepping on AArch64 GNU/Linux.
924
be81798b
PA
925* "info threads", "info inferiors", "info display", "info checkpoints"
926 and "maint info program-spaces" now list the corresponding items in
927 ascending ID order, for consistency with all other "info" commands.
928
3685b09f
PMR
929* In Ada, the overloads selection menu has been enhanced to display the
930 parameter types and the return types for the matching overloaded subprograms.
931
fbea99ea
PA
932* New commands
933
934maint set target-non-stop (on|off|auto)
935maint show target-non-stop
936 Control whether GDB targets always operate in non-stop mode even if
937 "set non-stop" is "off". The default is "auto", meaning non-stop
938 mode is enabled if supported by the target.
939
18989b3c
AB
940maint set bfd-sharing
941maint show bfd-sharing
942 Control the reuse of bfd objects.
943
566f5e3b
AB
944set debug bfd-cache
945show debug bfd-cache
946 Control display of debugging info regarding bfd caching.
947
6e9567fe
JB
948set debug fbsd-lwp
949show debug fbsd-lwp
950 Control display of debugging info regarding FreeBSD threads.
951
73b8c1fd
PA
952set remote multiprocess-extensions-packet
953show remote multiprocess-extensions-packet
954 Set/show the use of the remote protocol multiprocess extensions.
955
65706a29
PA
956set remote thread-events
957show remote thread-events
958 Set/show the use of thread create/exit events.
959
3685b09f
PMR
960set ada print-signatures on|off
961show ada print-signatures"
962 Control whether parameter types and return types are displayed in overloads
963 selection menus. It is activaled (@code{on}) by default.
964
5fdf6324
AB
965set max-value-size
966show max-value-size
967 Controls the maximum size of memory, in bytes, that GDB will
968 allocate for value contents. Prevents incorrect programs from
969 causing GDB to allocate overly large buffers. Default is 64k.
970
6ff0ba5f
DE
971* The "disassemble" command accepts a new modifier: /s.
972 It prints mixed source+disassembly like /m with two differences:
973 - disassembled instructions are now printed in program order, and
974 - and source for all relevant files is now printed.
975 The "/m" option is now considered deprecated: its "source-centric"
976 output hasn't proved useful in practice.
977
0c532a29
MM
978* The "record instruction-history" command accepts a new modifier: /s.
979 It behaves exactly like /m and prints mixed source+disassembly.
980
f2665db5
MM
981* The "set scheduler-locking" command supports a new mode "replay".
982 It behaves like "off" in record mode and like "on" in replay mode.
983
40e0b271
PA
984* Support for various ROM monitors has been removed:
985
986 target dbug dBUG ROM monitor for Motorola ColdFire
987 target picobug Motorola picobug monitor
988 target dink32 DINK32 ROM monitor for PowerPC
989 target m32r Renesas M32R/D ROM monitor
990 target mon2000 mon2000 ROM monitor
991 target ppcbug PPCBUG ROM monitor for PowerPC
992
fd2ae5d6 993* Support for reading/writing memory and extracting values on architectures
d63dd61e 994 whose memory is addressable in units of any integral multiple of 8 bits.
fd2ae5d6 995
9f757bf7
XR
996catch handlers
997 Allows to break when an Ada exception is handled.
998
b459a59b
DB
999* New remote packets
1000
1001exec stop reason
1002 Indicates that an exec system call was executed.
1003
1004exec-events feature in qSupported
1005 The qSupported packet allows GDB to request support for exec
1006 events using the new 'gdbfeature' exec-event, and the qSupported
1007 response can contain the corresponding 'stubfeature'. Set and
1008 show commands can be used to display whether these features are enabled.
1009
de979965
PA
1010vCtrlC
1011 Equivalent to interrupting with the ^C character, but works in
1012 non-stop mode.
1013
65706a29
PA
1014thread created stop reason (T05 create:...)
1015 Indicates that the thread was just created and is stopped at entry.
1016
1017thread exit stop reply (w exitcode;tid)
1018 Indicates that the thread has terminated.
1019
1020QThreadEvents
1021 Enables/disables thread create and exit event reporting. For
1022 example, this is used in non-stop mode when GDB stops a set of
1023 threads and synchronously waits for the their corresponding stop
1024 replies. Without exit events, if one of the threads exits, GDB
1025 would hang forever not knowing that it should no longer expect a
1026 stop for that same thread.
1027
f2faf941 1028N stop reply
f2faf941
PA
1029 Indicates that there are no resumed threads left in the target (all
1030 threads are stopped). The remote stub reports support for this stop
1031 reply to GDB's qSupported query.
1032
aab3c527
JK
1033QCatchSyscalls
1034 Enables/disables catching syscalls from the inferior process.
1035 The remote stub reports support for this packet to GDB's qSupported query.
82075af2
JS
1036
1037syscall_entry stop reason
1038 Indicates that a syscall was just called.
1039
1040syscall_return stop reason
1041 Indicates that a syscall just returned.
1042
b459a59b
DB
1043* Extended-remote exec events
1044
1045 ** GDB now has support for exec events on extended-remote Linux targets.
1046 For such targets with Linux kernels 2.5.46 and later, this enables
1047 follow-exec-mode and exec catchpoints.
1048
1049set remote exec-event-feature-packet
1050show remote exec-event-feature-packet
1051 Set/show the use of the remote exec event feature.
1052
79efa585
SM
1053 * Thread names in remote protocol
1054
1055 The reply to qXfer:threads:read may now include a name attribute for each
1056 thread.
1057
19d9d4ef
DB
1058* Target remote mode fork and exec events
1059
1060 ** GDB now has support for fork and exec events on target remote mode
1061 Linux targets. For such targets with Linux kernels 2.5.46 and later,
1062 this enables follow-fork-mode, detach-on-fork, follow-exec-mode, and
1063 fork and exec catchpoints.
1064
82075af2
JS
1065* Remote syscall events
1066
1067 ** GDB now has support for catch syscall on remote Linux targets,
1068 currently enabled on x86/x86_64 architectures.
1069
1070set remote catch-syscall-packet
1071show remote catch-syscall-packet
1072 Set/show the use of the remote catch syscall feature.
1073
1c35a88f
LM
1074* MI changes
1075
1076 ** The -var-set-format command now accepts the zero-hexadecimal
1077 format. It outputs data in hexadecimal format with zero-padding on the
1078 left.
1079
84654457
PA
1080* Python Scripting
1081
22a02324
PA
1082 ** gdb.InferiorThread objects have a new attribute "global_num",
1083 which refers to the thread's global thread ID. The existing
1084 "num" attribute now refers to the thread's per-inferior number.
1085 See "Per-inferior thread numbers" above.
84654457
PA
1086 ** gdb.InferiorThread objects have a new attribute "inferior", which
1087 is the Inferior object the thread belongs to.
1088
7c79d316 1089*** Changes in GDB 7.10
df8411da 1090
c16a3f52
OJ
1091* Support for process record-replay and reverse debugging on aarch64*-linux*
1092 targets has been added. GDB now supports recording of A64 instruction set
1093 including advance SIMD instructions.
1094
18a94d75
DE
1095* Support for Sun's version of the "stabs" debug file format has been removed.
1096
df8411da
SDJ
1097* GDB now honors the content of the file /proc/PID/coredump_filter
1098 (PID is the process ID) on GNU/Linux systems. This file can be used
1099 to specify the types of memory mappings that will be included in a
1100 corefile. For more information, please refer to the manual page of
1101 "core(5)". GDB also has a new command: "set use-coredump-filter
1102 on|off". It allows to set whether GDB will read the content of the
1103 /proc/PID/coredump_filter file when generating a corefile.
3b2f13ff 1104
d33279b3
AT
1105* The "info os" command on GNU/Linux can now display information on
1106 cpu information :
1107 "info os cpus" Listing of all cpus/cores on the system
1108
236af5e3
YG
1109* GDB has two new commands: "set serial parity odd|even|none" and
1110 "show serial parity". These allows to set or show parity for the
1111 remote serial I/O.
1112
b6577aab
DE
1113* The "info source" command now displays the producer string if it was
1114 present in the debug info. This typically includes the compiler version
1115 and may include things like its command line arguments.
1116
b30a0bc3
JB
1117* The "info dll", an alias of the "info sharedlibrary" command,
1118 is now available on all platforms.
1119
599bd15c
GB
1120* Directory names supplied to the "set sysroot" commands may be
1121 prefixed with "target:" to tell GDB to access shared libraries from
1122 the target system, be it local or remote. This replaces the prefix
1123 "remote:". The default sysroot has been changed from "" to
1124 "target:". "remote:" is automatically converted to "target:" for
1125 backward compatibility.
1126
a9a5a3d1
GB
1127* The system root specified by "set sysroot" will be prepended to the
1128 filename of the main executable (if reported to GDB as absolute by
1129 the operating system) when starting processes remotely, and when
1130 attaching to already-running local or remote processes.
1131
1b6e6f5c
GB
1132* GDB now supports automatic location and retrieval of executable
1133 files from remote targets. Remote debugging can now be initiated
1134 using only a "target remote" or "target extended-remote" command
1135 (no "set sysroot" or "file" commands are required). See "New remote
1136 packets" below.
1137
cf75d6c3
AB
1138* The "dump" command now supports verilog hex format.
1139
417c80f9
AA
1140* GDB now supports the vector ABI on S/390 GNU/Linux targets.
1141
51aad7cc
GB
1142* On GNU/Linux, GDB and gdbserver are now able to access executable
1143 and shared library files without a "set sysroot" command when
1144 attaching to processes running in different mount namespaces from
1145 the debugger. This makes it possible to attach to processes in
1146 containers as simply as "gdb -p PID" or "gdbserver --attach PID".
1147 See "New remote packets" below.
1148
51f0e40d
AB
1149* The "tui reg" command now provides completion for all of the
1150 available register groups, including target specific groups.
1151
b58c513b
PP
1152* The HISTSIZE environment variable is no longer read when determining
1153 the size of GDB's command history. GDB now instead reads the dedicated
bc460514
PP
1154 GDBHISTSIZE environment variable. Setting GDBHISTSIZE to "-1" or to "" now
1155 disables truncation of command history. Non-numeric values of GDBHISTSIZE
1156 are ignored.
b58c513b 1157
37442ce1
DE
1158* Guile Scripting
1159
1160 ** Memory ports can now be unbuffered.
1161
3a8b707a
DE
1162* Python Scripting
1163
1164 ** gdb.Objfile objects have a new attribute "username",
1165 which is the name of the objfile as specified by the user,
1166 without, for example, resolving symlinks.
d11916aa 1167 ** You can now write frame unwinders in Python.
59fb7612
SS
1168 ** gdb.Type objects have a new method "optimized_out",
1169 returning optimized out gdb.Value instance of this type.
4c082a81
SC
1170 ** gdb.Value objects have new methods "reference_value" and
1171 "const_value" which return a reference to the value and a
1172 "const" version of the value respectively.
3a8b707a 1173
f57d2163
DE
1174* New commands
1175
1176maint print symbol-cache
1177 Print the contents of the symbol cache.
1178
1179maint print symbol-cache-statistics
1180 Print statistics of symbol cache usage.
1181
1182maint flush-symbol-cache
1183 Flush the contents of the symbol cache.
1184
f4abbc16
MM
1185record btrace bts
1186record bts
1187 Start branch trace recording using Branch Trace Store (BTS) format.
1188
36de76f9
JK
1189compile print
1190 Evaluate expression by using the compiler and print result.
1191
a4ea0946
AB
1192tui enable
1193tui disable
1194 Explicit commands for enabling and disabling tui mode.
1195
29c1c244
WT
1196show mpx bound
1197set mpx bound on i386 and amd64
bc504a31 1198 Support for bound table investigation on Intel MPX enabled applications.
29c1c244 1199
b20a6524
MM
1200record btrace pt
1201record pt
bc504a31 1202 Start branch trace recording using Intel Processor Trace format.
b20a6524 1203
b0627500
MM
1204maint info btrace
1205 Print information about branch tracing internals.
1206
1207maint btrace packet-history
1208 Print the raw branch tracing data.
1209
1210maint btrace clear-packet-history
1211 Discard the stored raw branch tracing data.
1212
1213maint btrace clear
1214 Discard all branch tracing data. It will be fetched and processed
1215 anew by the next "record" command.
1216
253828f1
JK
1217* New options
1218
b4f54984
DE
1219set debug dwarf-die
1220 Renamed from "set debug dwarf2-die".
1221show debug dwarf-die
1222 Renamed from "show debug dwarf2-die".
1223
1224set debug dwarf-read
1225 Renamed from "set debug dwarf2-read".
1226show debug dwarf-read
1227 Renamed from "show debug dwarf2-read".
1228
1229maint set dwarf always-disassemble
1230 Renamed from "maint set dwarf2 always-disassemble".
1231maint show dwarf always-disassemble
1232 Renamed from "maint show dwarf2 always-disassemble".
1233
1234maint set dwarf max-cache-age
1235 Renamed from "maint set dwarf2 max-cache-age".
1236maint show dwarf max-cache-age
1237 Renamed from "maint show dwarf2 max-cache-age".
1238
27e0867f
DE
1239set debug dwarf-line
1240show debug dwarf-line
1241 Control display of debugging info regarding DWARF line processing.
1242
ef0b411a
GB
1243set max-completions
1244show max-completions
1245 Set the maximum number of candidates to be considered during
1246 completion. The default value is 200. This limit allows GDB
1247 to avoid generating large completion lists, the computation of
1248 which can cause the debugger to become temporarily unresponsive.
1249
fc637f04
PP
1250set history remove-duplicates
1251show history remove-duplicates
1252 Control the removal of duplicate history entries.
1253
f57d2163
DE
1254maint set symbol-cache-size
1255maint show symbol-cache-size
1256 Control the size of the symbol cache.
1257
d33501a5
MM
1258set|show record btrace bts buffer-size
1259 Set and show the size of the ring buffer used for branch tracing in
1260 BTS format.
1261 The obtained size may differ from the requested size. Use "info
1262 record" to see the obtained buffer size.
1263
7a6a1731
GB
1264set debug linux-namespaces
1265show debug linux-namespaces
1266 Control display of debugging info regarding Linux namespaces.
1267
b20a6524
MM
1268set|show record btrace pt buffer-size
1269 Set and show the size of the ring buffer used for branch tracing in
bc504a31 1270 Intel Processor Trace format.
b20a6524
MM
1271 The obtained size may differ from the requested size. Use "info
1272 record" to see the obtained buffer size.
1273
b0627500
MM
1274maint set|show btrace pt skip-pad
1275 Set and show whether PAD packets are skipped when computing the
1276 packet history.
1277
253828f1
JK
1278* The command 'thread apply all' can now support new option '-ascending'
1279 to call its specified command for all threads in ascending order.
1280
9f050062
DE
1281* Python/Guile scripting
1282
1283 ** GDB now supports auto-loading of Python/Guile scripts contained in the
1284 special section named `.debug_gdb_scripts'.
1285
f4abbc16
MM
1286* New remote packets
1287
1288qXfer:btrace-conf:read
1289 Return the branch trace configuration for the current thread.
1290
d33501a5
MM
1291Qbtrace-conf:bts:size
1292 Set the requested ring buffer size for branch tracing in BTS format.
1293
b20a6524 1294Qbtrace:pt
bc504a31 1295 Enable Intel Procesor Trace-based branch tracing for the current
b20a6524
MM
1296 process. The remote stub reports support for this packet to GDB's
1297 qSupported query.
1298
1299Qbtrace-conf:pt:size
bc504a31 1300 Set the requested ring buffer size for branch tracing in Intel Processor
b20a6524
MM
1301 Trace format.
1302
f7e6eed5
PA
1303swbreak stop reason
1304 Indicates a memory breakpoint instruction was executed, irrespective
1305 of whether it was GDB that planted the breakpoint or the breakpoint
1306 is hardcoded in the program. This is required for correct non-stop
1307 mode operation.
1308
1309hwbreak stop reason
1310 Indicates the target stopped for a hardware breakpoint. This is
1311 required for correct non-stop mode operation.
1312
0a93529c
GB
1313vFile:fstat:
1314 Return information about files on the remote system.
1315
c78fa86a
GB
1316qXfer:exec-file:read
1317 Return the full absolute name of the file that was executed to
1318 create a process running on the remote system.
1319
15a201c8
GB
1320vFile:setfs:
1321 Select the filesystem on which vFile: operations with filename
1322 arguments will operate. This is required for GDB to be able to
1323 access files on remote targets where the remote stub does not
1324 share a common filesystem with the inferior(s).
1325
0d71eef5
DB
1326fork stop reason
1327 Indicates that a fork system call was executed.
1328
1329vfork stop reason
1330 Indicates that a vfork system call was executed.
1331
1332vforkdone stop reason
1333 Indicates that a vfork child of the specified process has executed
1334 an exec or exit, allowing the vfork parent to resume execution.
1335
1336fork-events and vfork-events features in qSupported
1337 The qSupported packet allows GDB to request support for fork and
1338 vfork events using new 'gdbfeatures' fork-events and vfork-events,
1339 and the qSupported response can contain the corresponding
1340 'stubfeatures'. Set and show commands can be used to display
1341 whether these features are enabled.
1342
1343* Extended-remote fork events
1344
1345 ** GDB now has support for fork events on extended-remote Linux
1346 targets. For targets with Linux kernels 2.5.60 and later, this
1347 enables follow-fork-mode and detach-on-fork for both fork and
1348 vfork, as well as fork and vfork catchpoints.
1349
d33501a5
MM
1350* The info record command now shows the recording format and the
1351 branch tracing configuration for the current thread when using
1352 the btrace record target.
1353 For the BTS format, it shows the ring buffer size.
1354
b05e3b0d
JM
1355* GDB now has support for DTrace USDT (Userland Static Defined
1356 Tracing) probes. The supported targets are x86_64-*-linux-gnu.
1357
550bdf96
AA
1358* GDB now supports access to vector registers on S/390 GNU/Linux
1359 targets.
1360
4f45d445
JK
1361* Removed command line options
1362
1363-xdb HP-UX XDB compatibility mode.
1364
0800b440
JK
1365* Removed targets and native configurations
1366
1367HP/PA running HP-UX hppa*-*-hpux*
1368Itanium running HP-UX ia64-*-hpux*
1369
58bfce93
MM
1370* New configure options
1371
1372--with-intel-pt
1373 This configure option allows the user to build GDB with support for
bc504a31 1374 Intel Processor Trace (default: auto). This requires libipt.
58bfce93
MM
1375
1376--with-libipt-prefix=PATH
1377 Specify the path to the version of libipt that GDB should use.
1378 $PATH/include should contain the intel-pt.h header and
1379 $PATH/lib should contain the libipt.so library.
1380
f5f85ab9
JB
1381*** Changes in GDB 7.9.1
1382
1383* Python Scripting
1384
1385 ** Xmethods can now specify a result type.
1386
3b2f13ff 1387*** Changes in GDB 7.9
919b9a93 1388
05db5edd
ST
1389* GDB now supports hardware watchpoints on x86 GNU Hurd.
1390
5f3b99cf 1391* Python Scripting
2b4fd423
DE
1392
1393 ** You can now access frame registers from Python scripts.
1394 ** New attribute 'producer' for gdb.Symtab objects.
d096d8c1
DE
1395 ** gdb.Objfile objects have a new attribute "progspace",
1396 which is the gdb.Progspace object of the containing program space.
a0be3e44 1397 ** gdb.Objfile objects have a new attribute "owner".
7c50a931
DE
1398 ** gdb.Objfile objects have a new attribute "build_id",
1399 which is the build ID generated when the file was built.
86e4ed39 1400 ** gdb.Objfile objects have a new method "add_separate_debug_file".
4ffbba72
DE
1401 ** A new event "gdb.clear_objfiles" has been added, triggered when
1402 selecting a new file to debug.
02be9a71 1403 ** You can now add attributes to gdb.Objfile and gdb.Progspace objects.
6dddd6a5 1404 ** New function gdb.lookup_objfile.
5f3b99cf 1405
8fda9068
YQ
1406 New events which are triggered when GDB modifies the state of the
1407 inferior.
1408
1409 ** gdb.events.inferior_call_pre: Function call is about to be made.
1410 ** gdb.events.inferior_call_post: Function call has just been made.
1411 ** gdb.events.memory_changed: A memory location has been altered.
1412 ** gdb.events.register_changed: A register has been altered.
1413
faa42425
DE
1414* New Python-based convenience functions:
1415
1416 ** $_caller_is(name [, number_of_frames])
1417 ** $_caller_matches(regexp [, number_of_frames])
1418 ** $_any_caller_is(name [, number_of_frames])
1419 ** $_any_caller_matches(regexp [, number_of_frames])
1420
bb2ec1b3
TT
1421* GDB now supports the compilation and injection of source code into
1422 the inferior. GDB will use GCC 5.0 or higher built with libcc1.so
1423 to compile the source code to object code, and if successful, inject
1424 and execute that code within the current context of the inferior.
1425 Currently the C language is supported. The commands used to
1426 interface with this new feature are:
1427
1428 compile code [-raw|-r] [--] [source code]
1429 compile file [-raw|-r] filename
1430
81219e53
DE
1431* New commands
1432
439250fb
DE
1433demangle [-l language] [--] name
1434 Demangle "name" in the specified language, or the current language
1435 if elided. This command is renamed from the "maint demangle" command.
1436 The latter is kept as a no-op to avoid "maint demangle" being interpreted
1437 as "maint demangler-warning".
1438
81219e53
DE
1439queue-signal signal-name-or-number
1440 Queue a signal to be delivered to the thread when it is resumed.
1441
f10c5b19
JK
1442add-auto-load-scripts-directory directory
1443 Add entries to the list of directories from which to load auto-loaded
1444 scripts.
1445
f5b95c01
AA
1446maint print user-registers
1447 List all currently available "user" registers.
1448
bb2ec1b3
TT
1449compile code [-r|-raw] [--] [source code]
1450 Compile, inject, and execute in the inferior the executable object
1451 code produced by compiling the provided source code.
1452
1453compile file [-r|-raw] filename
1454 Compile and inject into the inferior the executable object code
1455 produced by compiling the source code stored in the filename
1456 provided.
1457
70509625
PA
1458* On resume, GDB now always passes the signal the program had stopped
1459 for to the thread the signal was sent to, even if the user changed
1460 threads before resuming. Previously GDB would often (but not
1461 always) deliver the signal to the thread that happens to be current
1462 at resume time.
1463
1464* Conversely, the "signal" command now consistently delivers the
1465 requested signal to the current thread. GDB now asks for
1466 confirmation if the program had stopped for a signal and the user
1467 switched threads meanwhile.
1468
a25a5a45
PA
1469* "breakpoint always-inserted" modes "off" and "auto" merged.
1470
1471 Now, when 'breakpoint always-inserted mode' is set to "off", GDB
1472 won't remove breakpoints from the target until all threads stop,
1473 even in non-stop mode. The "auto" mode has been removed, and "off"
1474 is now the default mode.
1475
cc485e62
DE
1476* New options
1477
1478set debug symbol-lookup
1479show debug symbol-lookup
1480 Control display of debugging info regarding symbol lookup.
1481
2ddf4301
SM
1482* MI changes
1483
1484 ** The -list-thread-groups command outputs an exit-code field for
1485 inferiors that have exited.
1486
bb7e3f4d
YQ
1487* New targets
1488
1489MIPS SDE mips*-sde*-elf*
1490
3831839c
PA
1491* Removed targets
1492
1493Support for these obsolete configurations has been removed.
1494
5ab806de
PA
1495Alpha running OSF/1 (or Tru64) alpha*-*-osf*
1496SGI Irix-5.x mips-*-irix5*
1497SGI Irix-6.x mips-*-irix6*
09dd9a69
PA
1498VAX running (4.2 - 4.3 Reno) BSD vax-*-bsd*
1499VAX running Ultrix vax-*-ultrix*
3831839c 1500
6bf6fd09
JB
1501* The "dll-symbols" command, and its two aliases ("add-shared-symbol-files"
1502 and "assf"), have been removed. Use the "sharedlibrary" command, or
1503 its alias "share", instead.
1504
919b9a93 1505*** Changes in GDB 7.8
e9475ead 1506
8d551b02
DE
1507* New command line options
1508
1509-D data-directory
1510 This is an alias for the --data-directory option.
1511
e9475ead
SA
1512* GDB supports printing and modifying of variable length automatic arrays
1513 as specified in ISO C99.
1514
a75fef0e
NC
1515* The ARM simulator now supports instruction level tracing
1516 with or without disassembly.
b7bba001 1517
ed3ef339
DE
1518* Guile scripting
1519
1520 GDB now has support for scripting using Guile. Whether this is
1521 available is determined at configure time.
1522 Guile version 2.0 or greater is required.
1523 Guile version 2.0.9 is well tested, earlier 2.0 versions are not.
1524
1525* New commands (for set/show, see "New options" below)
1526
1527guile [code]
1528gu [code]
1529 Invoke CODE by passing it to the Guile interpreter.
1530
1531guile-repl
1532gr
1533 Start a Guile interactive prompt (or "repl" for "read-eval-print loop").
1534
1535info auto-load guile-scripts [regexp]
1536 Print the list of automatically loaded Guile scripts.
1537
1538* The source command is now capable of sourcing Guile scripts.
1539 This feature is dependent on the debugger being built with Guile support.
1540
c6044dd1
JB
1541* New options
1542
770e7fc7
DE
1543set print symbol-loading (off|brief|full)
1544show print symbol-loading
1545 Control whether to print informational messages when loading symbol
1546 information for a file. The default is "full", but when debugging
1547 programs with large numbers of shared libraries the amount of output
1548 becomes less useful.
1549
ed3ef339
DE
1550set guile print-stack (none|message|full)
1551show guile print-stack
1552 Show a stack trace when an error is encountered in a Guile script.
1553
1554set auto-load guile-scripts (on|off)
1555show auto-load guile-scripts
1556 Control auto-loading of Guile script files.
1557
c6044dd1
JB
1558maint ada set ignore-descriptive-types (on|off)
1559maint ada show ignore-descriptive-types
1560 Control whether the debugger should ignore descriptive types in Ada
1561 programs. The default is not to ignore the descriptive types. See
1562 the user manual for more details on descriptive types and the intended
1563 usage of this option.
1564
6a3cb8e8
PA
1565set auto-connect-native-target
1566
1567 Control whether GDB is allowed to automatically connect to the
1568 native target for the run, attach, etc. commands when not connected
1569 to any target yet. See also "target native" below.
1570
67b5c0c1
MM
1571set record btrace replay-memory-access (read-only|read-write)
1572show record btrace replay-memory-access
1573 Control what memory accesses are allowed during replay.
1574
329ea579
PA
1575maint set target-async (on|off)
1576maint show target-async
5784b3ca
JK
1577 This controls whether GDB targets operate in synchronous or
1578 asynchronous mode. Normally the default is asynchronous, if it is
329ea579 1579 available; but this can be changed to more easily debug problems
5784b3ca 1580 occurring only in synchronous mode.
329ea579
PA
1581
1582set mi-async (on|off)
1583show mi-async
1584 Control whether MI asynchronous mode is preferred. This supersedes
1585 "set target-async" of previous GDB versions.
1586
1587* "set target-async" is deprecated as a CLI option and is now an alias
1588 for "set mi-async" (only puts MI into async mode).
1589
1590* Background execution commands (e.g., "c&", "s&", etc.) are now
1591 possible ``out of the box'' if the target supports them. Previously
1592 the user would need to explicitly enable the possibility with the
1593 "set target-async on" command.
1594
87ce2a04
DE
1595* New features in the GDB remote stub, GDBserver
1596
1597 ** New option --debug-format=option1[,option2,...] allows one to add
1598 additional text to each output. At present only timestamps
1599 are supported: --debug-format=timestamps.
1600 Timestamps can also be turned on with the
1601 "monitor set debug-format timestamps" command from GDB.
1602
5de9129b
MM
1603* The 'record instruction-history' command now starts counting instructions
1604 at one. This also affects the instruction ranges reported by the
1605 'record function-call-history' command when given the /i modifier.
1606
8710b709
MM
1607* The command 'record function-call-history' supports a new modifier '/c' to
1608 indent the function names based on their call stack depth.
1609 The fields for the '/i' and '/l' modifier have been reordered.
1610 The source line range is now prefixed with 'at'.
1611 The instruction range is now prefixed with 'inst'.
1612 Both ranges are now printed as '<from>, <to>' to allow copy&paste to the
1613 "record instruction-history" and "list" commands.
1614
0688d04e
MM
1615* The ranges given as arguments to the 'record function-call-history' and
1616 'record instruction-history' commands are now inclusive.
1617
066ce621 1618* The btrace record target now supports the 'record goto' command.
0b722aec
MM
1619 For locations inside the execution trace, the back trace is computed
1620 based on the information stored in the execution trace.
066ce621 1621
52834460
MM
1622* The btrace record target supports limited reverse execution and replay.
1623 The target does not record data and therefore does not allow reading
1624 memory or registers.
1625
237b092b
AA
1626* The "catch syscall" command now works on s390*-linux* targets.
1627
936d2992
PA
1628* The "compare-sections" command is no longer specific to target
1629 remote. It now works with all targets.
1630
930ee1b1
PA
1631* All native targets are now consistently called "native".
1632 Consequently, the "target child", "target GNU", "target djgpp",
1633 "target procfs" (Solaris/Irix/OSF/AIX) and "target darwin-child"
1634 commands have been replaced with "target native". The QNX/NTO port
1635 leaves the "procfs" target in place and adds a "native" target for
1636 consistency with other ports. The impact on users should be minimal
1637 as these commands previously either throwed an error, or were
1638 no-ops. The target's name is visible in the output of the following
1639 commands: "help target", "info target", "info files", "maint print
1640 target-stack".
1641
6a3cb8e8
PA
1642* The "target native" command now connects to the native target. This
1643 can be used to launch native programs even when "set
1644 auto-connect-native-target" is set to off.
1645
bc504a31 1646* GDB now supports access to Intel MPX registers on GNU/Linux.
dc304a94 1647
bc504a31
PA
1648* Support for Intel AVX-512 registers on GNU/Linux.
1649 Support displaying and modifying Intel AVX-512 registers
dc304a94
JK
1650 $zmm0 - $zmm31 and $k0 - $k7 on GNU/Linux.
1651
969c39fb
MM
1652* New remote packets
1653
1654qXfer:btrace:read's annex
1655 The qXfer:btrace:read packet supports a new annex 'delta' to read
1656 branch trace incrementally.
1657
f7bd0f78
SC
1658* Python Scripting
1659
1660 ** Valid Python operations on gdb.Value objects representing
1661 structs/classes invoke the corresponding overloaded operators if
1662 available.
0c6e92a5
SC
1663 ** New `Xmethods' feature in the Python API. Xmethods are
1664 additional methods or replacements for existing methods of a C++
1665 class. This feature is useful for those cases where a method
1666 defined in C++ source code could be inlined or optimized out by
1667 the compiler, making it unavailable to GDB.
f7bd0f78 1668
36c24d95
UW
1669* New targets
1670PowerPC64 GNU/Linux little-endian powerpc64le-*-linux*
1671
95060284
JB
1672* The "dll-symbols" command, and its two aliases ("add-shared-symbol-files"
1673 and "assf"), have been deprecated. Use the "sharedlibrary" command, or
1674 its alias "share", instead.
1675
7f3c0343
JB
1676* The commands "set remotebaud" and "show remotebaud" are no longer
1677 supported. Use "set serial baud" and "show serial baud" (respectively)
1678 instead.
1679
329ea579
PA
1680* MI changes
1681
1682 ** A new option "-gdb-set mi-async" replaces "-gdb-set
1683 target-async". The latter is left as a deprecated alias of the
1684 former for backward compatibility. If the target supports it,
1685 CLI background execution commands are now always possible by
1686 default, independently of whether the frontend stated a
1687 preference for asynchronous execution with "-gdb-set mi-async".
1688 Previously "-gdb-set target-async off" affected both MI execution
1689 commands and CLI execution commands.
1690
b7bba001 1691*** Changes in GDB 7.7
2d450646 1692
33a97bbe
OJ
1693* Improved support for process record-replay and reverse debugging on
1694 arm*-linux* targets. Support for thumb32 and syscall instruction
1695 recording has been added.
1696
08248ca9
SDJ
1697* GDB now supports SystemTap SDT probes on AArch64 GNU/Linux.
1698
73869dc2
DE
1699* GDB now supports Fission DWP file format version 2.
1700 http://gcc.gnu.org/wiki/DebugFission
1701
a280dbd1
SDJ
1702* New convenience function "$_isvoid", to check whether an expression
1703 is void. A void expression is an expression where the type of the
1704 result is "void". For example, some convenience variables may be
1705 "void" when evaluated (e.g., "$_exitcode" before the execution of
1706 the program being debugged; or an undefined convenience variable).
1707 Another example, when calling a function whose return type is
1708 "void".
1709
52e260a3
DE
1710* The "maintenance print objfiles" command now takes an optional regexp.
1711
9f948660
SDJ
1712* The "catch syscall" command now works on arm*-linux* targets.
1713
901461f8
PA
1714* GDB now consistently shows "<not saved>" when printing values of
1715 registers the debug info indicates have not been saved in the frame
1716 and there's nowhere to retrieve them from
1717 (callee-saved/call-clobbered registers):
1718
1719 (gdb) p $rax
1720 $1 = <not saved>
1721
1722 (gdb) info registers rax
1723 rax <not saved>
1724
1725 Before, the former would print "<optimized out>", and the latter
1726 "*value not available*".
1727
caf26be9
SB
1728* New script contrib/gdb-add-index.sh for adding .gdb_index sections
1729 to binaries.
1730
1e611234
PM
1731* Python scripting
1732
1733 ** Frame filters and frame decorators have been added.
f76c27b5 1734 ** Temporary breakpoints are now supported.
bc79de95 1735 ** Line tables representation has been added.
a16b0e22
SC
1736 ** New attribute 'parent_type' for gdb.Field objects.
1737 ** gdb.Field objects can be used as subscripts on gdb.Value objects.
c0d48811 1738 ** New attribute 'name' for gdb.Type objects.
1e611234 1739
a1217d97
SL
1740* New targets
1741
1742Nios II ELF nios2*-*-elf
1743Nios II GNU/Linux nios2*-*-linux
42059f0e 1744Texas Instruments MSP430 msp430*-*-elf
a1217d97 1745
2659903b
JK
1746* Removed native configurations
1747
1748Support for these a.out NetBSD and OpenBSD obsolete configurations has
1749been removed. ELF variants of these configurations are kept supported.
1750
1751arm*-*-netbsd* but arm*-*-netbsdelf* is kept supported.
1752i[34567]86-*-netbsd* but i[34567]86-*-netbsdelf* is kept supported.
1753i[34567]86-*-openbsd[0-2].* but i[34567]86-*-openbsd* is kept supported.
1754i[34567]86-*-openbsd3.[0-3]
1755m68*-*-netbsd* but m68*-*-netbsdelf* is kept supported.
1756sparc-*-netbsd* but sparc-*-netbsdelf* is kept supported.
1757vax-*-netbsd* but vax-*-netbsdelf* is kept supported.
1758
bd712aed 1759* New commands:
b340913d
TT
1760catch rethrow
1761 Like "catch throw", but catches a re-thrown exception.
7d0c9981
DE
1762maint check-psymtabs
1763 Renamed from old "maint check-symtabs".
1764maint check-symtabs
1765 Perform consistency checks on symtabs.
1766maint expand-symtabs
1767 Expand symtabs matching an optional regexp.
b340913d 1768
dccca75d
EZ
1769show configuration
1770 Display the details of GDB configure-time options.
1771
bd712aed
DE
1772maint set|show per-command
1773maint set|show per-command space
1774maint set|show per-command time
1775maint set|show per-command symtab
1776 Enable display of per-command gdb resource usage.
1777
98297bf6
NB
1778remove-symbol-file FILENAME
1779remove-symbol-file -a ADDRESS
1780 Remove a symbol file added via add-symbol-file. The file to remove
1781 can be identified by its filename or by an address that lies within
1782 the boundaries of this symbol file in memory.
1783
58d06528
JB
1784info exceptions
1785info exceptions REGEXP
1786 Display the list of Ada exceptions defined in the program being
1787 debugged. If provided, only the exceptions whose names match REGEXP
1788 are listed.
1789
bd3eecc3
PA
1790* New options
1791
8fb8eb5c
DE
1792set debug symfile off|on
1793show debug symfile
1794 Control display of debugging info regarding reading symbol files and
1795 symbol tables within those files
1796
e7045703
DE
1797set print raw frame-arguments
1798show print raw frame-arguments
1799 Set/show whether to print frame arguments in raw mode,
1800 disregarding any defined pretty-printers.
1801
bd3eecc3
PA
1802set remote trace-status-packet
1803show remote trace-status-packet
1804 Set/show the use of remote protocol qTStatus packet.
1805
a1217d97
SL
1806set debug nios2
1807show debug nios2
1808 Control display of debugging messages related to Nios II targets.
1809
c1e36e3e
PA
1810set range-stepping
1811show range-stepping
1812 Control whether target-assisted range stepping is enabled.
1813
98882a26
PA
1814set startup-with-shell
1815show startup-with-shell
1816 Specifies whether Unix child processes are started via a shell or
1817 directly.
1818
29453a14
YQ
1819set code-cache
1820show code-cache
1821 Use the target memory cache for accesses to the code segment. This
1822 improves performance of remote debugging (particularly disassembly).
1823
1c2e4450
PA
1824* You can now use a literal value 'unlimited' for options that
1825 interpret 0 or -1 as meaning "unlimited". E.g., "set
1826 trace-buffer-size unlimited" is now an alias for "set
1827 trace-buffer-size -1" and "set height unlimited" is now an alias for
1828 "set height 0".
1829
db0fec5c
DE
1830* The "set debug symtab-create" debugging option of GDB has been changed to
1831 accept a verbosity level. 0 means "off", 1 provides basic debugging
1832 output, and values of 2 or greater provides more verbose output.
1833
dccca75d
EZ
1834* New command-line options
1835--configuration
1836 Display the details of GDB configure-time options.
1837
d0353e76
YQ
1838* The command 'tsave' can now support new option '-ctf' to save trace
1839 buffer in Common Trace Format.
1840
b292c783
JK
1841* Newly installed $prefix/bin/gcore acts as a shell interface for the
1842 GDB command gcore.
1843
6e72ca20
TT
1844* GDB now implements the the C++ 'typeid' operator.
1845
b340913d
TT
1846* The new convenience variable $_exception holds the exception being
1847 thrown or caught at an exception-related catchpoint.
1848
1849* The exception-related catchpoints, like "catch throw", now accept a
1850 regular expression which can be used to filter exceptions by type.
1851
0c557179
SDJ
1852* The new convenience variable $_exitsignal is automatically set to
1853 the terminating signal number when the program being debugged dies
1854 due to an uncaught signal.
1855
d0353e76
YQ
1856* MI changes
1857
403cb6b1 1858 ** All MI commands now accept an optional "--language" option.
4e35e808
JB
1859 Support for this feature can be verified by using the "-list-features"
1860 command, which should contain "language-option".
403cb6b1 1861
6b7cbff1
JB
1862 ** The new command -info-gdb-mi-command allows the user to determine
1863 whether a GDB/MI command is supported or not.
1864
2ea126fa
JB
1865 ** The "^error" result record returned when trying to execute an undefined
1866 GDB/MI command now provides a variable named "code" whose content is the
1867 "undefined-command" error code. Support for this feature can be verified
1868 by using the "-list-features" command, which should contain
1869 "undefined-command-error-code".
1870
d0353e76
YQ
1871 ** The -trace-save MI command can optionally save trace buffer in Common
1872 Trace Format now.
1873
c5867ab6
HZ
1874 ** The new command -dprintf-insert sets a dynamic printf breakpoint.
1875
c898adb7
YQ
1876 ** The command -data-list-register-values now accepts an optional
1877 "--skip-unavailable" option. When used, only the available registers
1878 are displayed.
1879
dc673c81
YQ
1880 ** The new command -trace-frame-collected dumps collected variables,
1881 computed expressions, tvars, memory and registers in a traceframe.
1882
6211c335
YQ
1883 ** The commands -stack-list-locals, -stack-list-arguments and
1884 -stack-list-variables now accept an option "--skip-unavailable".
1885 When used, only the available locals or arguments are displayed.
1886
5713b9b5
JB
1887 ** The -exec-run command now accepts an optional "--start" option.
1888 When used, the command follows the same semantics as the "start"
1889 command, stopping the program's execution at the start of its
72bfa06c
JB
1890 main subprogram. Support for this feature can be verified using
1891 the "-list-features" command, which should contain
1892 "exec-run-start-option".
5713b9b5 1893
40555925
JB
1894 ** The new commands -catch-assert and -catch-exceptions insert
1895 catchpoints stopping the program when Ada exceptions are raised.
1896
58d06528
JB
1897 ** The new command -info-ada-exceptions provides the equivalent of
1898 the new "info exceptions" command.
1899
0201faac
JB
1900* New system-wide configuration scripts
1901 A GDB installation now provides scripts suitable for use as system-wide
1902 configuration scripts for the following systems:
1903 ** ElinOS
1904 ** Wind River Linux
1905
c1e36e3e
PA
1906* GDB now supports target-assigned range stepping with remote targets.
1907 This improves the performance of stepping source lines by reducing
1908 the number of control packets from/to GDB. See "New remote packets"
1909 below.
1910
28a93511
YQ
1911* GDB now understands the element 'tvar' in the XML traceframe info.
1912 It has the id of the collected trace state variables.
1913
4ac33720
UW
1914* On S/390 targets that provide the transactional-execution feature,
1915 the program interruption transaction diagnostic block (TDB) is now
1916 represented as a number of additional "registers" in GDB.
1917
c1e36e3e
PA
1918* New remote packets
1919
1920vCont;r
1921
1922 The vCont packet supports a new 'r' action, that tells the remote
1923 stub to step through an address range itself, without GDB
1924 involvemement at each single-step.
1925
7f91dbec
GB
1926qXfer:libraries-svr4:read's annex
1927 The previously unused annex of the qXfer:libraries-svr4:read packet
1928 is now used to support passing an argument list. The remote stub
1929 reports support for this argument list to GDB's qSupported query.
1930 The defined arguments are "start" and "prev", used to reduce work
1931 necessary for library list updating, resulting in significant
1932 speedup.
1933
c2d6af84
PA
1934* New features in the GDB remote stub, GDBserver
1935
1936 ** GDBserver now supports target-assisted range stepping. Currently
1937 enabled on x86/x86_64 GNU/Linux targets.
1938
28a93511
YQ
1939 ** GDBserver now adds element 'tvar' in the XML in the reply to
1940 'qXfer:traceframe-info:read'. It has the id of the collected
1941 trace state variables.
1942
7a60ad40
YQ
1943 ** GDBserver now supports hardware watchpoints on the MIPS GNU/Linux
1944 target.
1945
6fbe845e
AB
1946* New 'z' formatter for printing and examining memory, this displays the
1947 value as hexadecimal zero padded on the left to the size of the type.
1948
9058cc3a
TG
1949* GDB can now use Windows x64 unwinding data.
1950
0d12017b
JB
1951* The "set remotebaud" command has been replaced by "set serial baud".
1952 Similarly, "show remotebaud" has been replaced by "show serial baud".
1953 The "set remotebaud" and "show remotebaud" commands are still available
1954 to provide backward compatibility with older versions of GDB.
1955
2d450646 1956*** Changes in GDB 7.6
80c8d323 1957
59ea5688
MM
1958* Target record has been renamed to record-full.
1959 Record/replay is now enabled with the "record full" command.
1960 This also affects settings that are associated with full record/replay
1961 that have been moved from "set/show record" to "set/show record full":
1962
1963set|show record full insn-number-max
1964set|show record full stop-at-limit
1965set|show record full memory-query
1966
1967* A new record target "record-btrace" has been added. The new target
1968 uses hardware support to record the control-flow of a process. It
1969 does not support replaying the execution, but it implements the
1970 below new commands for investigating the recorded execution log.
1971 This new recording method can be enabled using:
1972
1973record btrace
1974
1975 The "record-btrace" target is only available on Intel Atom processors
1976 and requires a Linux kernel 2.6.32 or later.
1977
1978* Two new commands have been added for record/replay to give information
1979 about the recorded execution without having to replay the execution.
1980 The commands are only supported by "record btrace".
1981
1982record instruction-history prints the execution history at
1983 instruction granularity
1984
1985record function-call-history prints the execution history at
1986 function granularity
1987
543bf33d
AT
1988* New native configurations
1989
51d66578 1990ARM AArch64 GNU/Linux aarch64*-*-linux-gnu
543bf33d 1991FreeBSD/powerpc powerpc*-*-freebsd
4f4352f7 1992x86_64/Cygwin x86_64-*-cygwin*
ea5f3910 1993Tilera TILE-Gx GNU/Linux tilegx*-*-linux-gnu
543bf33d 1994
249729c4
JB
1995* New targets
1996
51d66578
MS
1997ARM AArch64 aarch64*-*-elf
1998ARM AArch64 GNU/Linux aarch64*-*-linux
249729c4 1999Lynx 178 PowerPC powerpc-*-lynx*178
3c095f49 2000x86_64/Cygwin x86_64-*-cygwin*
ea5f3910 2001Tilera TILE-Gx GNU/Linux tilegx*-*-linux
249729c4 2002
e64e0392
DE
2003* If the configured location of system.gdbinit file (as given by the
2004 --with-system-gdbinit option at configure time) is in the
2005 data-directory (as specified by --with-gdb-datadir at configure
2006 time) or in one of its subdirectories, then GDB will look for the
2007 system-wide init file in the directory specified by the
2008 --data-directory command-line option.
2009
07540c15
DE
2010* New command line options:
2011
2012-nh Disables auto-loading of ~/.gdbinit, but still executes all the
2013 other initialization files, unlike -nx which disables all of them.
2014
e93a8774
TT
2015* Removed command line options
2016
2017-epoch This was used by the gdb mode in Epoch, an ancient fork of
2018 Emacs.
2019
53342f27
TT
2020* The 'ptype' and 'whatis' commands now accept an argument to control
2021 type formatting.
2022
451b7c33
TT
2023* 'info proc' now works on some core files.
2024
a72c3253
DE
2025* Python scripting
2026
2027 ** Vectors can be created with gdb.Type.vector.
2028
d7de8e3c
TT
2029 ** Python's atexit.register now works in GDB.
2030
18a9fc12
TT
2031 ** Types can be pretty-printed via a Python API.
2032
9a27f2c6
PK
2033 ** Python 3 is now supported (in addition to Python 2.4 or later)
2034
bea883fd
SCR
2035 ** New class gdb.Architecture exposes GDB's internal representation
2036 of architecture in the Python API.
2037
2038 ** New method Frame.architecture returns the gdb.Architecture object
2039 corresponding to the frame's architecture.
2040
a72c3253
DE
2041* New Python-based convenience functions:
2042
2043 ** $_memeq(buf1, buf2, length)
2044 ** $_streq(str1, str2)
2045 ** $_strlen(str)
2046 ** $_regex(str, regex)
2047
f3c8a52a
JK
2048* The 'cd' command now defaults to using '~' (the home directory) if not
2049 given an argument.
2050
1605ef26
TT
2051* The C++ ABI now defaults to the GNU v3 ABI. This has been the
2052 default for GCC since November 2000.
2053
504b36fd
YQ
2054* The command 'forward-search' can now be abbreviated as 'fo'.
2055
f2a8bc8a
YQ
2056* The command 'info tracepoints' can now display 'installed on target'
2057 or 'not installed on target' for each non-pending location of tracepoint.
2058
23a80689
JB
2059* New configure options
2060
2061--enable-libmcheck/--disable-libmcheck
2062 By default, development versions are built with -lmcheck on hosts
2063 that support it, in order to help track memory corruption issues.
2064 Release versions, on the other hand, are built without -lmcheck
2065 by default. The --enable-libmcheck/--disable-libmcheck configure
2066 options allow the user to override that default.
393fd4c3
YQ
2067--with-babeltrace/--with-babeltrace-include/--with-babeltrace-lib
2068 This configure option allows the user to build GDB with
2069 libbabeltrace using which GDB can read Common Trace Format data.
23a80689 2070
d6b28940
TT
2071* New commands (for set/show, see "New options" below)
2072
ab04a2af
TT
2073catch signal
2074 Catch signals. This is similar to "handle", but allows commands and
2075 conditions to be attached.
2076
d6b28940
TT
2077maint info bfds
2078 List the BFDs known to GDB.
2079
8315665e
YPK
2080python-interactive [command]
2081pi [command]
2082 Start a Python interactive prompt, or evaluate the optional command
2083 and print the result of expressions.
2084
2085py [command]
2086 "py" is a new alias for "python".
2087
18a9fc12
TT
2088enable type-printer [name]...
2089disable type-printer [name]...
2090 Enable or disable type printers.
2091
aa9259cc
TS
2092* Removed commands
2093
2094 ** For the Renesas Super-H architecture, the "regs" command has been removed
2095 (has been deprecated in GDB 7.5), and "info all-registers" should be used
2096 instead.
2097
53342f27
TT
2098* New options
2099
2100set print type methods (on|off)
2101show print type methods
2102 Control whether method declarations are displayed by "ptype".
2103 The default is to show them.
2104
2105set print type typedefs (on|off)
2106show print type typedefs
2107 Control whether typedef definitions are displayed by "ptype".
2108 The default is to show them.
2109
1b56eb55
JK
2110set filename-display basename|relative|absolute
2111show filename-display
2112 Control the way in which filenames is displayed.
2113 The default is "relative", which preserves previous behavior.
2114
e9f1758d
PA
2115set trace-buffer-size
2116show trace-buffer-size
2117 Request target to change the size of trace buffer.
2118
a46c1e42
PA
2119set remote trace-buffer-size-packet auto|on|off
2120show remote trace-buffer-size-packet
2121 Control the use of the remote protocol `QTBuffer:size' packet.
2122
be9a8770
PA
2123set debug aarch64
2124show debug aarch64
2125 Control display of debugging messages related to ARM AArch64.
2126 The default is off.
2127
2128set debug coff-pe-read
2129show debug coff-pe-read
2130 Control display of debugging messages related to reading of COFF/PE
2131 exported symbols.
2132
2133set debug mach-o
2134show debug mach-o
2135 Control display of debugging messages related to Mach-O symbols
2136 processing.
2137
2138set debug notification
2139show debug notification
2140 Control display of debugging info for async remote notification.
2141
5b9afe8a
YQ
2142* MI changes
2143
2144 ** Command parameter changes are now notified using new async record
2145 "=cmd-param-changed".
201b4506
YQ
2146 ** Trace frame changes caused by command "tfind" are now notified using
2147 new async record "=traceframe-changed".
134a2066
YQ
2148 ** The creation, deletion and modification of trace state variables
2149 are now notified using new async records "=tsv-created",
2150 "=tsv-deleted" and "=tsv-modified".
82a90ccf
YQ
2151 ** The start and stop of process record are now notified using new
2152 async record "=record-started" and "=record-stopped".
8de0566d
YQ
2153 ** Memory changes are now notified using new async record
2154 "=memory-changed".
ed8a1c2d 2155 ** The data-disassemble command response will include a "fullname" field
ec83d211 2156 containing the absolute file name when source has been requested.
62747a60
TT
2157 ** New optional parameter COUNT added to the "-data-write-memory-bytes"
2158 command, to allow pattern filling of memory areas.
3fa7bf06
MG
2159 ** New commands "-catch-load"/"-catch-unload" added for intercepting
2160 library load/unload events.
f2a8bc8a
YQ
2161 ** The response to breakpoint commands and breakpoint async records
2162 includes an "installed" field containing a boolean state about each
2163 non-pending tracepoint location is whether installed on target or not.
f5911ea1
HAQ
2164 ** Output of the "-trace-status" command includes a "trace-file" field
2165 containing the name of the trace file being examined. This field is
2166 optional, and only present when examining a trace file.
ec83d211
JK
2167 ** The "fullname" field is now always present along with the "file" field,
2168 even if the file cannot be found by GDB.
5b9afe8a 2169
608e2dbb
TT
2170* GDB now supports the "mini debuginfo" section, .gnu_debugdata.
2171 You must have the LZMA library available when configuring GDB for this
2172 feature to be enabled. For more information, see:
2173 http://fedoraproject.org/wiki/Features/MiniDebugInfo
2174
f6f899bf
HAQ
2175* New remote packets
2176
2177QTBuffer:size
2178 Set the size of trace buffer. The remote stub reports support for this
2179 packet to gdb's qSupported query.
2180
10782d74
MM
2181Qbtrace:bts
2182 Enable Branch Trace Store (BTS)-based branch tracing for the current
2183 thread. The remote stub reports support for this packet to gdb's
2184 qSupported query.
2185
2186Qbtrace:off
2187 Disable branch tracing for the current thread. The remote stub reports
2188 support for this packet to gdb's qSupported query.
2189
2190qXfer:btrace:read
2191 Read the traced branches for the current thread. The remote stub
2192 reports support for this packet to gdb's qSupported query.
2193
80c8d323 2194*** Changes in GDB 7.5
d6e00af6 2195
1b3371b1
L
2196* GDB now supports x32 ABI. Visit <http://sites.google.com/site/x32abi/>
2197 for more x32 ABI info.
2198
d0e64392
MR
2199* GDB now supports access to MIPS DSP registers on Linux targets.
2200
4cc0665f
MR
2201* GDB now supports debugging microMIPS binaries.
2202
85d4a676
SS
2203* The "info os" command on GNU/Linux can now display information on
2204 several new classes of objects managed by the operating system:
2205 "info os procgroups" lists process groups
2206 "info os files" lists file descriptors
2207 "info os sockets" lists internet-domain sockets
2208 "info os shm" lists shared-memory regions
2209 "info os semaphores" lists semaphores
2210 "info os msg" lists message queues
2211 "info os modules" lists loaded kernel modules
2212
55aa24fb
SDJ
2213* GDB now has support for SDT (Static Defined Tracing) probes. Currently,
2214 the only implemented backend is for SystemTap probes (<sys/sdt.h>). You
2215 can set a breakpoint using the new "-probe, "-pstap" or "-probe-stap"
2216 options and inspect the probe arguments using the new $_probe_arg family
2217 of convenience variables. You can obtain more information about SystemTap
2218 in <http://sourceware.org/systemtap/>.
2219
72508ac0
PO
2220* GDB now supports reversible debugging on ARM, it allows you to
2221 debug basic ARM and THUMB instructions, and provides
2222 record/replay support.
2223
16899756
DE
2224* The option "symbol-reloading" has been deleted as it is no longer used.
2225
4795f398
DE
2226* Python scripting
2227
7d74f244
DE
2228 ** GDB commands implemented in Python can now be put in command class
2229 "gdb.COMMAND_USER".
2230
4795f398
DE
2231 ** The "maint set python print-stack on|off" is now deleted.
2232
50897289
TT
2233 ** A new class, gdb.printing.FlagEnumerationPrinter, can be used to
2234 apply "flag enum"-style pretty-printing to any enum.
2235
64e7d9dd
TT
2236 ** gdb.lookup_symbol can now work when there is no current frame.
2237
2238 ** gdb.Symbol now has a 'line' attribute, holding the line number in
2239 the source at which the symbol was defined.
2240
f0823d2c
TT
2241 ** gdb.Symbol now has the new attribute 'needs_frame' and the new
2242 method 'value'. The former indicates whether the symbol needs a
2243 frame in order to compute its value, and the latter computes the
2244 symbol's value.
2245
7b282c5a
SCR
2246 ** A new method 'referenced_value' on gdb.Value objects which can
2247 dereference pointer as well as C++ reference values.
2248
a20ee7a4
SCR
2249 ** New methods 'global_block' and 'static_block' on gdb.Symtab objects
2250 which return the global and static blocks (as gdb.Block objects),
2251 of the underlying symbol table, respectively.
2252
7efc75aa
SCR
2253 ** New function gdb.find_pc_line which returns the gdb.Symtab_and_line
2254 object associated with a PC value.
2255
ee0bf529
SCR
2256 ** gdb.Symtab_and_line has new attribute 'last' which holds the end
2257 of the address range occupied by code for the current source line.
2258
a766d390
DE
2259* Go language support.
2260 GDB now supports debugging programs written in the Go programming
2261 language.
2262
e0f9f062
DE
2263* GDBserver now supports stdio connections.
2264 E.g. (gdb) target remote | ssh myhost gdbserver - hello
2265
217bff3e
JK
2266* The binary "gdbtui" can no longer be built or installed.
2267 Use "gdb -tui" instead.
2268
cafec441
TT
2269* GDB will now print "flag" enums specially. A flag enum is one where
2270 all the enumerator values have no bits in common when pairwise
2271 "and"ed. When printing a value whose type is a flag enum, GDB will
2272 show all the constants, e.g., for enum E { ONE = 1, TWO = 2}:
2273 (gdb) print (enum E) 3
2274 $1 = (ONE | TWO)
2275
4aac40c8
TT
2276* The filename part of a linespec will now match trailing components
2277 of a source file name. For example, "break gcc/expr.c:1000" will
2278 now set a breakpoint in build/gcc/expr.c, but not
2279 build/libcpp/expr.c.
2280
d99bd577
UW
2281* The "info proc" and "generate-core-file" commands will now also
2282 work on remote targets connected to GDBserver on Linux.
2283
53fe1783
GB
2284* The command "info catch" has been removed. It has been disabled
2285 since December 2007.
2286
e41eec66
JB
2287* The "catch exception" and "catch assert" commands now accept
2288 a condition at the end of the command, much like the "break"
2289 command does. For instance:
2290
2291 (gdb) catch exception Constraint_Error if Barrier = True
2292
2293 Previously, it was possible to add a condition to such catchpoints,
2294 but it had to be done as a second step, after the catchpoint had been
2295 created, using the "condition" command.
2296
5808517f
YQ
2297* The "info static-tracepoint-marker" command will now also work on
2298 native Linux targets with in-process agent.
2299
481860b3
GB
2300* GDB can now set breakpoints on inlined functions.
2301
2302* The .gdb_index section has been updated to include symbols for
2303 inlined functions. GDB will ignore older .gdb_index sections by
2304 default, which could cause symbol files to be loaded more slowly
e615022a
DE
2305 until their .gdb_index sections can be recreated. The new command
2306 "set use-deprecated-index-sections on" will cause GDB to use any older
2307 .gdb_index sections it finds. This will restore performance, but the
2308 ability to set breakpoints on inlined functions will be lost in symbol
2309 files with older .gdb_index sections.
481860b3 2310
156942c7
DE
2311 The .gdb_index section has also been updated to record more information
2312 about each symbol. This speeds up the "info variables", "info functions"
2313 and "info types" commands when used with programs having the .gdb_index
2314 section, as well as speeding up debugging with shared libraries using
2315 the .gdb_index section.
2316
927fbba6
JB
2317* Ada support for GDB/MI Variable Objects has been added.
2318
20388dd6
YQ
2319* GDB can now support 'breakpoint always-inserted mode' in 'record'
2320 target.
2321
f3e0e960
SS
2322* MI changes
2323
2324 ** New command -info-os is the MI equivalent of "info os".
2325
37ce89eb
SS
2326 ** Output logs ("set logging" and related) now include MI output.
2327
edcc5120
TT
2328* New commands
2329
e615022a
DE
2330 ** "set use-deprecated-index-sections on|off"
2331 "show use-deprecated-index-sections on|off"
2332 Controls the use of deprecated .gdb_index sections.
2333
edcc5120
TT
2334 ** "catch load" and "catch unload" can be used to stop when a shared
2335 library is loaded or unloaded, respectively.
2336
816338b5
SS
2337 ** "enable count" can be used to auto-disable a breakpoint after
2338 several hits.
2339
57651221 2340 ** "info vtbl" can be used to show the virtual method tables for
c4aeac85
TT
2341 C++ and Java objects.
2342
06fc020f 2343 ** "explore" and its sub commands "explore value" and "explore type"
6ea71545 2344 can be used to recursively explore values and types of
06fc020f
SCR
2345 expressions. These commands are available only if GDB is
2346 configured with '--with-python'.
2347
bf88dd68
JK
2348 ** "info auto-load" shows status of all kinds of auto-loaded files,
2349 "info auto-load gdb-scripts" shows status of auto-loading GDB canned
2350 sequences of commands files, "info auto-load python-scripts"
2351 shows status of auto-loading Python script files,
2352 "info auto-load local-gdbinit" shows status of loading init file
2353 (.gdbinit) from current directory and "info auto-load libthread-db" shows
2354 status of inferior specific thread debugging shared library loading.
2355
2356 ** "info auto-load-scripts", "set auto-load-scripts on|off"
2357 and "show auto-load-scripts" commands have been deprecated, use their
2358 "info auto-load python-scripts", "set auto-load python-scripts on|off"
2359 and "show auto-load python-scripts" counterparts instead.
2360
e7e0cddf
SS
2361 ** "dprintf location,format,args..." creates a dynamic printf, which
2362 is basically a breakpoint that does a printf and immediately
2363 resumes your program's execution, so it is like a printf that you
2364 can insert dynamically at runtime instead of at compiletime.
2365
9cb709b6
TT
2366 ** "set print symbol"
2367 "show print symbol"
2368 Controls whether GDB attempts to display the symbol, if any,
2369 corresponding to addresses it prints. This defaults to "on", but
2370 you can set it to "off" to restore GDB's previous behavior.
2371
2d4c29c5
TS
2372* Deprecated commands
2373
2374 ** For the Renesas Super-H architecture, the "regs" command has been
2375 deprecated, and "info all-registers" should be used instead.
2376
a58b110a
KB
2377* New targets
2378
2379Renesas RL78 rl78-*-elf
60c9a3c0 2380HP OpenVMS ia64 ia64-hp-openvms*
a58b110a 2381
72895ff6
LM
2382* GDBserver supports evaluation of breakpoint conditions. When
2383 support is advertised by GDBserver, GDB may be told to send the
2384 breakpoint conditions in bytecode form to GDBserver. GDBserver
2385 will only report the breakpoint trigger to GDB when its condition
2386 evaluates to true.
2387
2388* New options
2389
4cc0665f
MR
2390set mips compression
2391show mips compression
2392 Select the compressed ISA encoding used in functions that have no symbol
2393 information available. The encoding can be set to either of:
2394 mips16
2395 micromips
2396 and is updated automatically from ELF file flags if available.
2397
72895ff6
LM
2398set breakpoint condition-evaluation
2399show breakpoint condition-evaluation
cf65ecd3 2400 Control whether breakpoint conditions are evaluated by GDB ("host") or by
5b43fab2
JK
2401 GDBserver ("target"). Default option "auto" chooses the most efficient
2402 available mode.
72895ff6
LM
2403 This option can improve debugger efficiency depending on the speed of the
2404 target.
2405
bf88dd68
JK
2406set auto-load off
2407 Disable auto-loading globally.
2408
2409show auto-load
2410 Show auto-loading setting of all kinds of auto-loaded files.
2411
2412set auto-load gdb-scripts on|off
2413show auto-load gdb-scripts
2414 Control auto-loading of GDB canned sequences of commands files.
2415
2416set auto-load python-scripts on|off
2417show auto-load python-scripts
2418 Control auto-loading of Python script files.
2419
2420set auto-load local-gdbinit on|off
2421show auto-load local-gdbinit
2422 Control loading of init file (.gdbinit) from current directory.
2423
2424set auto-load libthread-db on|off
2425show auto-load libthread-db
2426 Control auto-loading of inferior specific thread debugging shared library.
2427
7349ff92 2428set auto-load scripts-directory <dir1>[:<dir2>...]
9cc815f5 2429show auto-load scripts-directory
7349ff92
JK
2430 Set a list of directories from which to load auto-loaded scripts.
2431 Automatically loaded Python scripts and GDB scripts are located in one
2432 of the directories listed by this option.
2433 The delimiter (':' above) may differ according to the host platform.
2434
bccbefd2
JK
2435set auto-load safe-path <dir1>[:<dir2>...]
2436show auto-load safe-path
2437 Set a list of directories from which it is safe to auto-load files.
2438 The delimiter (':' above) may differ according to the host platform.
2439
4dc84fd1
JK
2440set debug auto-load on|off
2441show debug auto-load
2442 Control display of debugging info for auto-loading the files above.
2443
d3ce09f5 2444set dprintf-style gdb|call|agent
e7e0cddf 2445show dprintf-style
d3ce09f5
SS
2446 Control the way in which a dynamic printf is performed; "gdb"
2447 requests a GDB printf command, while "call" causes dprintf to call a
2448 function in the inferior. "agent" requests that the target agent
2449 (such as GDBserver) do the printing.
e7e0cddf
SS
2450
2451set dprintf-function <expr>
2452show dprintf-function
2453set dprintf-channel <expr>
2454show dprintf-channel
2455 Set the function and optional first argument to the call when using
2456 the "call" style of dynamic printf.
2457
d3ce09f5
SS
2458set disconnected-dprintf on|off
2459show disconnected-dprintf
2460 Control whether agent-style dynamic printfs continue to be in effect
2461 after GDB disconnects.
2462
6dea1fbd
JK
2463* New configure options
2464
7349ff92
JK
2465--with-auto-load-dir
2466 Configure default value for the 'set auto-load scripts-directory'
1564a261
JK
2467 setting above. It defaults to '$debugdir:$datadir/auto-load',
2468 $debugdir representing global debugging info directories (available
2469 via 'show debug-file-directory') and $datadir representing GDB's data
2470 directory (available via 'show data-directory').
7349ff92 2471
6dea1fbd
JK
2472--with-auto-load-safe-path
2473 Configure default value for the 'set auto-load safe-path' setting
7349ff92 2474 above. It defaults to the --with-auto-load-dir setting.
6dea1fbd
JK
2475
2476--without-auto-load-safe-path
2477 Set 'set auto-load safe-path' to '/', effectively disabling this
2478 security feature.
2479
72895ff6
LM
2480* New remote packets
2481
74c48cbb
PA
2482z0/z1 conditional breakpoints extension
2483
72895ff6
LM
2484 The z0/z1 breakpoint insertion packets have been extended to carry
2485 a list of conditional expressions over to the remote stub depending on the
2486 condition evaluation mode. The use of this extension can be controlled
2487 via the "set remote conditional-breakpoints-packet" command.
2488
9b224c5e
PA
2489QProgramSignals:
2490
2491 Specify the signals which the remote stub may pass to the debugged
2492 program without GDB involvement.
2493
8320cc4f
JK
2494* New command line options
2495
2496--init-command=FILE, -ix Like --command, -x but execute it
2497 before loading inferior.
2498--init-eval-command=COMMAND, -iex Like --eval-command=COMMAND, -ex but
2499 execute it before loading inferior.
2500
8837a20f
JB
2501*** Changes in GDB 7.4
2502
f8eba3c6
TT
2503* GDB now handles ambiguous linespecs more consistently; the existing
2504 FILE:LINE support has been expanded to other types of linespecs. A
2505 breakpoint will now be set on all matching locations in all
2506 inferiors, and locations will be added or removed according to
2507 inferior changes.
2508
1bfeeb0f
JL
2509* GDB now allows you to skip uninteresting functions and files when
2510 stepping with the "skip function" and "skip file" commands.
2511
480a3f21
PW
2512* GDB has two new commands: "set remote hardware-watchpoint-length-limit"
2513 and "show remote hardware-watchpoint-length-limit". These allows to
2514 set or show the maximum length limit (in bytes) of a remote
2515 target hardware watchpoint.
2516
2517 This allows e.g. to use "unlimited" hardware watchpoints with the
2518 gdbserver integrated in Valgrind version >= 3.7.0. Such Valgrind
2519 watchpoints are slower than real hardware watchpoints but are
2520 significantly faster than gdb software watchpoints.
2521
3a7bf607
PM
2522* Python scripting
2523
32d1c362 2524 ** The register_pretty_printer function in module gdb.printing now takes
7d0aff21 2525 an optional `replace' argument. If True, the new printer replaces any
32d1c362
DE
2526 existing one.
2527
3a7bf607 2528 ** The "maint set python print-stack on|off" command has been
4795f398
DE
2529 deprecated and will be deleted in GDB 7.5.
2530 A new command: "set python print-stack none|full|message" has
2531 replaced it. Additionally, the default for "print-stack" is
2532 now "message", which just prints the error message without
2533 the stack trace.
3a7bf607 2534
baacfb07 2535 ** A prompt substitution hook (prompt_hook) is now available to the
3a7bf607 2536 Python API.
713389e0 2537
fa3a4f15
PM
2538 ** A new Python module, gdb.prompt has been added to the GDB Python
2539 modules library. This module provides functionality for
baacfb07 2540 escape sequences in prompts (used by set/show
fa3a4f15
PM
2541 extended-prompt). These escape sequences are replaced by their
2542 corresponding value.
2543
5e239b84
PM
2544 ** Python commands and convenience-functions located in
2545 'data-directory'/python/gdb/command and
2546 'data-directory'/python/gdb/function are now automatically loaded
2547 on GDB start-up.
2548
9df2fbc4
PM
2549 ** Blocks now provide four new attributes. global_block and
2550 static_block will return the global and static blocks
2551 respectively. is_static and is_global are boolean attributes
2552 that indicate if the block is one of those two types.
2553
457e09f0
DE
2554 ** Symbols now provide the "type" attribute, the type of the symbol.
2555
6839b47f
KP
2556 ** The "gdb.breakpoint" function has been deprecated in favor of
2557 "gdb.breakpoints".
2558
cc72b2a2
KP
2559 ** A new class "gdb.FinishBreakpoint" is provided to catch the return
2560 of a function. This class is based on the "finish" command
2561 available in the CLI.
2562
84ad80e6
PK
2563 ** Type objects for struct and union types now allow access to
2564 the fields using standard Python dictionary (mapping) methods.
2565 For example, "some_type['myfield']" now works, as does
2566 "some_type.items()".
2567
20c168b5
KP
2568 ** A new event "gdb.new_objfile" has been added, triggered by loading a
2569 new object file.
2570
03c3051a
PK
2571 ** A new function, "deep_items" has been added to the gdb.types
2572 module in the GDB Python modules library. This function returns
2573 an iterator over the fields of a struct or union type. Unlike
2574 the standard Python "iteritems" method, it will recursively traverse
2575 any anonymous fields.
2576
7376e450
TT
2577* MI changes
2578
2579 ** "*stopped" events can report several new "reason"s, such as
2580 "solib-event".
2581
2582 ** Breakpoint changes are now notified using new async records, like
2583 "=breakpoint-modified".
2584
2585 ** New command -ada-task-info.
2586
98a5dd13
DE
2587* libthread-db-search-path now supports two special values: $sdir and $pdir.
2588 $sdir specifies the default system locations of shared libraries.
2589 $pdir specifies the directory where the libpthread used by the application
2590 lives.
2591
2592 GDB no longer looks in $sdir and $pdir after it has searched the directories
2593 mentioned in libthread-db-search-path. If you want to search those
2594 directories, they must be specified in libthread-db-search-path.
2595 The default value of libthread-db-search-path on GNU/Linux and Solaris
2596 systems is now "$sdir:$pdir".
2597
2598 $pdir is not supported by gdbserver, it is currently ignored.
2599 $sdir is supported by gdbserver.
2600
478aac75
DE
2601* New configure option --with-iconv-bin.
2602 When using the internationalization support like the one in the GNU C
2603 library, GDB will invoke the "iconv" program to get a list of supported
2604 character sets. If this program lives in a non-standard location, one can
2605 use this option to specify where to find it.
2606
9c06b0b4
TJB
2607* When natively debugging programs on PowerPC BookE processors running
2608 a Linux kernel version 2.6.34 or later, GDB supports masked hardware
2609 watchpoints, which specify a mask in addition to an address to watch.
2610 The mask specifies that some bits of an address (the bits which are
2611 reset in the mask) should be ignored when matching the address accessed
2612 by the inferior against the watchpoint address. See the "PowerPC Embedded"
2613 section in the user manual for more details.
2614
03f2bd59
JK
2615* The new option --once causes GDBserver to stop listening for connections once
2616 the first connection is made. The listening port used by GDBserver will
2617 become available after that.
2618
71eba9c2 2619* New commands "info macros" and "alias" have been added.
edc84990 2620
2bda9cc5
JK
2621* New function parameters suffix @entry specifies value of function parameter
2622 at the time the function got called. Entry values are available only since
2623 gcc version 4.7.
2624
ed59ded5
DE
2625* New commands
2626
2627!SHELL COMMAND
2628 "!" is now an alias of the "shell" command.
2629 Note that no space is needed between "!" and SHELL COMMAND.
2630
9c06b0b4
TJB
2631* Changed commands
2632
2633watch EXPRESSION mask MASK_VALUE
2634 The watch command now supports the mask argument which allows creation
2635 of masked watchpoints, if the current architecture supports this feature.
2636
dbaefcf7
DE
2637info auto-load-scripts [REGEXP]
2638 This command was formerly named "maintenance print section-scripts".
2639 It is now generally useful and is no longer a maintenance-only command.
2640
71eba9c2 2641info macro [-all] [--] MACRO
2642 The info macro command has new options `-all' and `--'. The first for
2643 printing all definitions of a macro. The second for explicitly specifying
2644 the end of arguments and the beginning of the macro name in case the macro
2645 name starts with a hyphen.
2646
3065dfb6
SS
2647collect[/s] EXPRESSIONS
2648 The tracepoint collect command now takes an optional modifier "/s"
2649 that directs it to dereference pointer-to-character types and
2650 collect the bytes of memory up to a zero byte. The behavior is
2651 similar to what you see when you use the regular print command on a
2652 string. An optional integer following the "/s" sets a bound on the
2653 number of bytes that will be collected.
2654
f196051f
SS
2655tstart [NOTES]
2656 The trace start command now interprets any supplied arguments as a
2657 note to be recorded with the trace run, with an effect similar to
2658 setting the variable trace-notes.
2659
2660tstop [NOTES]
2661 The trace stop command now interprets any arguments as a note to be
2662 mentioned along with the tstatus report that the trace was stopped
2663 with a command. The effect is similar to setting the variable
2664 trace-stop-notes.
2665
d248b706
KY
2666* Tracepoints can now be enabled and disabled at any time after a trace
2667 experiment has been started using the standard "enable" and "disable"
2668 commands. It is now possible to start a trace experiment with no enabled
2669 tracepoints; GDB will display a warning, but will allow the experiment to
2670 begin, assuming that tracepoints will be enabled as needed while the trace
2671 is running.
2672
405f8e94
SS
2673* Fast tracepoints on 32-bit x86-architectures can now be placed at
2674 locations with 4-byte instructions, when they were previously
2675 limited to locations with instructions of 5 bytes or longer.
2676
2bda9cc5
JK
2677* New options
2678
45cfd468
DE
2679set debug dwarf2-read
2680show debug dwarf2-read
2681 Turns on or off display of debugging messages related to reading
2682 DWARF debug info. The default is off.
2683
2684set debug symtab-create
2685show debug symtab-create
2686 Turns on or off display of debugging messages related to symbol table
2687 creation. The default is off.
2688
baacfb07
PM
2689set extended-prompt
2690show extended-prompt
2691 Set the GDB prompt, and allow escape sequences to be inserted to
2692 display miscellaneous information (see 'help set extended-prompt'
2693 for the list of sequences). This prompt (and any information
2694 accessed through the escape sequences) is updated every time the
2695 prompt is displayed.
2696
2bda9cc5
JK
2697set print entry-values (both|compact|default|if-needed|no|only|preferred)
2698show print entry-values
2699 Set printing of frame argument values at function entry. In some cases
2700 GDB can determine the value of function argument which was passed by the
2701 function caller, even if the value was modified inside the called function.
2702
2703set debug entry-values
2704show debug entry-values
2705 Control display of debugging info for determining frame argument values at
2706 function entry and virtual tail call frames.
2707
c011a4f4
DE
2708set basenames-may-differ
2709show basenames-may-differ
2710 Set whether a source file may have multiple base names.
2711 (A "base name" is the name of a file with the directory part removed.
2712 Example: The base name of "/home/user/hello.c" is "hello.c".)
2713 If set, GDB will canonicalize file names (e.g., expand symlinks)
2714 before comparing them. Canonicalization is an expensive operation,
2715 but it allows the same file be known by more than one base name.
2716 If not set (the default), all source files are assumed to have just
2717 one base name, and gdb will do file name comparisons more efficiently.
2718
f196051f
SS
2719set trace-user
2720show trace-user
2721set trace-notes
2722show trace-notes
2723 Set a user name and notes for the current and any future trace runs.
2724 This is useful for long-running and/or disconnected traces, to
2725 inform others (or yourself) as to who is running the trace, supply
2726 contact information, or otherwise explain what is going on.
2727
2728set trace-stop-notes
2729show trace-stop-notes
2730 Set a note attached to the trace run, that is displayed when the
2731 trace has been stopped by a tstop command. This is useful for
2732 instance as an explanation, if you are stopping a trace run that was
2733 started by someone else.
2734
d248b706
KY
2735* New remote packets
2736
2737QTEnable
2738
2739 Dynamically enable a tracepoint in a started trace experiment.
2740
2741QTDisable
2742
2743 Dynamically disable a tracepoint in a started trace experiment.
2744
f196051f
SS
2745QTNotes
2746
2747 Set the user and notes of the trace run.
2748
2749qTP
2750
2751 Query the current status of a tracepoint.
2752
405f8e94
SS
2753qTMinFTPILen
2754
2755 Query the minimum length of instruction at which a fast tracepoint may
2756 be placed.
2757
1a532630
PP
2758* Dcache size (number of lines) and line-size are now runtime-configurable
2759 via "set dcache line" and "set dcache line-size" commands.
2760
11315641
YQ
2761* New targets
2762
2763Texas Instruments TMS320C6x tic6x-*-*
2764
87326c78
DD
2765* New Simulators
2766
2767Renesas RL78 rl78-*-elf
2768
e8d56f18
JB
2769*** Changes in GDB 7.3.1
2770
2771* The build failure for NetBSD and OpenBSD targets have now been fixed.
2772
d6e00af6 2773*** Changes in GDB 7.3
797054e6 2774
60f98dde
MS
2775* GDB has a new command: "thread find [REGEXP]".
2776 It finds the thread id whose name, target id, or thread extra info
2777 matches the given regular expression.
2778
eee5b35e
DD
2779* The "catch syscall" command now works on mips*-linux* targets.
2780
b716877b
AB
2781* The -data-disassemble MI command now supports modes 2 and 3 for
2782 dumping the instruction opcodes.
2783
aae1c79a
DE
2784* New command line options
2785
2786-data-directory DIR Specify DIR as the "data-directory".
2787 This is mostly for testing purposes.
2788
a86caf66
DE
2789* The "maint set python auto-load on|off" command has been renamed to
2790 "set auto-load-scripts on|off".
2791
99e7ae30
DE
2792* GDB has a new command: "set directories".
2793 It is like the "dir" command except that it replaces the
2794 source path list instead of augmenting it.
2795
4694da01
TT
2796* GDB now understands thread names.
2797
2798 On GNU/Linux, "info threads" will display the thread name as set by
2799 prctl or pthread_setname_np.
2800
2801 There is also a new command, "thread name", which can be used to
2802 assign a name internally for GDB to display.
2803
f4b8a18d
KW
2804* OpenCL C
2805 Initial support for the OpenCL C language (http://www.khronos.org/opencl)
2806 has been integrated into GDB.
2807
585d1eb8
PM
2808* Python scripting
2809
da5d4055
PM
2810 ** The function gdb.Write now accepts an optional keyword 'stream'.
2811 This keyword, when provided, will direct the output to either
2812 stdout, stderr, or GDB's logging output.
2813
9a6f1302
PM
2814 ** Parameters can now be be sub-classed in Python, and in particular
2815 you may implement the get_set_doc and get_show_doc functions.
2816 This improves how Parameter set/show documentation is processed
2817 and allows for more dynamic content.
2818
29703da4
PM
2819 ** Symbols, Symbol Table, Symbol Table and Line, Object Files,
2820 Inferior, Inferior Thread, Blocks, and Block Iterator APIs now
2821 have an is_valid method.
2822
350c6c65
PM
2823 ** Breakpoints can now be sub-classed in Python, and in particular
2824 you may implement a 'stop' function that is executed each time
2825 the inferior reaches that breakpoint.
2826
6e6fbe60
DE
2827 ** New function gdb.lookup_global_symbol looks up a global symbol.
2828
585d1eb8
PM
2829 ** GDB values in Python are now callable if the value represents a
2830 function. For example, if 'some_value' represents a function that
2831 takes two integer parameters and returns a value, you can call
2832 that function like so:
2833
2834 result = some_value (10,20)
2835
0e3509db
DE
2836 ** Module gdb.types has been added.
2837 It contains a collection of utilities for working with gdb.Types objects:
2838 get_basic_type, has_field, make_enum_dict.
2839
7b51bc51
DE
2840 ** Module gdb.printing has been added.
2841 It contains utilities for writing and registering pretty-printers.
2842 New classes: PrettyPrinter, SubPrettyPrinter,
2843 RegexpCollectionPrettyPrinter.
2844 New function: register_pretty_printer.
2845
2846 ** New commands "info pretty-printers", "enable pretty-printer" and
2847 "disable pretty-printer" have been added.
2848
99e7ae30
DE
2849 ** gdb.parameter("directories") is now available.
2850
d8e22779
TT
2851 ** New function gdb.newest_frame returns the newest frame in the
2852 selected thread.
2853
4694da01
TT
2854 ** The gdb.InferiorThread class has a new "name" attribute. This
2855 holds the thread's name.
2856
505500db
SW
2857 ** Python Support for Inferior events.
2858 Python scripts can add observers to be notified of events
824446ad 2859 occurring in the process being debugged.
c17a9e46
HZ
2860 The following events are currently supported:
2861 - gdb.events.cont Continue event.
2862 - gdb.events.exited Inferior exited event.
2863 - gdb.events.stop Signal received, and Breakpoint hit events.
2864
def98928
TT
2865* C++ Improvements:
2866
2867 ** GDB now puts template parameters in scope when debugging in an
2868 instantiation. For example, if you have:
2869
2870 template<int X> int func (void) { return X; }
2871
2872 then if you step into func<5>, "print X" will show "5". This
2873 feature requires proper debuginfo support from the compiler; it
2874 was added to GCC 4.5.
2875
66cb8159
TT
2876 ** The motion commands "next", "finish", "until", and "advance" now
2877 work better when exceptions are thrown. In particular, GDB will
2878 no longer lose control of the inferior; instead, the GDB will
2879 stop the inferior at the point at which the exception is caught.
2880 This functionality requires a change in the exception handling
2881 code that was introduced in GCC 4.5.
2882
4aac0db7
UW
2883* GDB now follows GCC's rules on accessing volatile objects when
2884 reading or writing target state during expression evaluation.
2885 One notable difference to prior behavior is that "print x = 0"
2886 no longer generates a read of x; the value of the assignment is
2887 now always taken directly from the value being assigned.
2888
283e6a52
TT
2889* GDB now has some support for using labels in the program's source in
2890 linespecs. For instance, you can use "advance label" to continue
2891 execution to a label.
2892
2893* GDB now has support for reading and writing a new .gdb_index
2894 section. This section holds a fast index of DWARF debugging
2895 information and can be used to greatly speed up GDB startup and
2896 operation. See the documentation for `save gdb-index' for details.
2897
b56df873 2898* The "watch" command now accepts an optional "-location" argument.
14c0d4e1 2899 When used, this causes GDB to watch the memory referred to by the
b56df873
TT
2900 expression. Such a watchpoint is never deleted due to it going out
2901 of scope.
2902
ae53ffa4
PA
2903* GDB now supports thread debugging of core dumps on GNU/Linux.
2904
2905 GDB now activates thread debugging using the libthread_db library
2906 when debugging GNU/Linux core dumps, similarly to when debugging
2907 live processes. As a result, when debugging a core dump file, GDB
2908 is now able to display pthread_t ids of threads. For example, "info
2909 threads" shows the same output as when debugging the process when it
2910 was live. In earlier releases, you'd see something like this:
2911
2912 (gdb) info threads
2913 * 1 LWP 6780 main () at main.c:10
2914
2915 While now you see this:
2916
2917 (gdb) info threads
2918 * 1 Thread 0x7f0f5712a700 (LWP 6780) main () at main.c:10
2919
2920 It is also now possible to inspect TLS variables when debugging core
2921 dumps.
2922
2923 When debugging a core dump generated on a machine other than the one
2924 used to run GDB, you may need to point GDB at the correct
2925 libthread_db library with the "set libthread-db-search-path"
2926 command. See the user manual for more details on this command.
2927
f1310107
TJB
2928* When natively debugging programs on PowerPC BookE processors running
2929 a Linux kernel version 2.6.34 or later, GDB supports ranged breakpoints,
2930 which stop execution of the inferior whenever it executes an instruction
2931 at any address within the specified range. See the "PowerPC Embedded"
2932 section in the user manual for more details.
2933
248c9dbc
JB
2934* New features in the GDB remote stub, GDBserver
2935
1aee7009
JB
2936 ** GDBserver is now supported on PowerPC LynxOS (versions 4.x and 5.x),
2937 and i686 LynxOS (version 5.x).
248c9dbc 2938
eb826dc6
MF
2939 ** GDBserver is now supported on Blackfin Linux.
2940
44603653
JB
2941* New native configurations
2942
2943ia64 HP-UX ia64-*-hpux*
2944
91021223
MF
2945* New targets:
2946
2947Analog Devices, Inc. Blackfin Processor bfin-*
2948
6e1bb179
JB
2949* Ada task switching is now supported on sparc-elf targets when
2950 debugging a program using the Ravenscar Profile. For more information,
2951 see the "Tasking Support when using the Ravenscar Profile" section
2952 in the GDB user manual.
2953
50c97f38
TT
2954* Guile support was removed.
2955
448a92bf
MF
2956* New features in the GNU simulator
2957
2958 ** The --map-info flag lists all known core mappings.
2959
66ee2731
MF
2960 ** CFI flashes may be simulated via the "cfi" device.
2961
76b8507d 2962*** Changes in GDB 7.2
bfbf3774 2963
ba25b921
PA
2964* Shared library support for remote targets by default
2965
2966 When GDB is configured for a generic, non-OS specific target, like
2967 for example, --target=arm-eabi or one of the many *-*-elf targets,
2968 GDB now queries remote stubs for loaded shared libraries using the
2969 `qXfer:libraries:read' packet. Previously, shared library support
2970 was always disabled for such configurations.
2971
4656f5c6
SW
2972* C++ Improvements:
2973
2974 ** Argument Dependent Lookup (ADL)
2975
2976 In C++ ADL lookup directs function search to the namespaces of its
2977 arguments even if the namespace has not been imported.
2978 For example:
2979 namespace A
2980 {
2981 class B { };
2982 void foo (B) { }
2983 }
2984 ...
2985 A::B b
2986 foo(b)
2987 Here the compiler will search for `foo' in the namespace of 'b'
2988 and find A::foo. GDB now supports this. This construct is commonly
2989 used in the Standard Template Library for operators.
2990
2991 ** Improved User Defined Operator Support
2992
2993 In addition to member operators, GDB now supports lookup of operators
2994 defined in a namespace and imported with a `using' directive, operators
2995 defined in the global scope, operators imported implicitly from an
2996 anonymous namespace, and the ADL operators mentioned in the previous
2997 entry.
2998 GDB now also supports proper overload resolution for all the previously
2999 mentioned flavors of operators.
3000
254e6b9e
DE
3001 ** static const class members
3002
3003 Printing of static const class members that are initialized in the
3004 class definition has been fixed.
3005
711e434b
PM
3006* Windows Thread Information Block access.
3007
3008 On Windows targets, GDB now supports displaying the Windows Thread
3009 Information Block (TIB) structure. This structure is visible either
3010 by using the new command `info w32 thread-information-block' or, by
3011 dereferencing the new convenience variable named `$_tlb', a
3012 thread-specific pointer to the TIB. This feature is also supported
3013 when remote debugging using GDBserver.
3014
0fb4aa4b
PA
3015* Static tracepoints
3016
3017 Static tracepoints are calls in the user program into a tracing
3018 library. One such library is a port of the LTTng kernel tracer to
3019 userspace --- UST (LTTng Userspace Tracer, http://lttng.org/ust).
3020 When debugging with GDBserver, GDB now supports combining the GDB
3021 tracepoint machinery with such libraries. For example: the user can
3022 use GDB to probe a static tracepoint marker (a call from the user
3023 program into the tracing library) with the new "strace" command (see
3024 "New commands" below). This creates a "static tracepoint" in the
3025 breakpoint list, that can be manipulated with the same feature set
3026 as fast and regular tracepoints. E.g., collect registers, local and
3027 global variables, collect trace state variables, and define
3028 tracepoint conditions. In addition, the user can collect extra
3029 static tracepoint marker specific data, by collecting the new
3030 $_sdata internal variable. When analyzing the trace buffer, you can
3031 inspect $_sdata like any other variable available to GDB. For more
3032 information, see the "Tracepoints" chapter in GDB user manual. New
3033 remote packets have been defined to support static tracepoints, see
3034 the "New remote packets" section below.
3035
ca11e899
SS
3036* Better reconstruction of tracepoints after disconnected tracing
3037
3038 GDB will attempt to download the original source form of tracepoint
3039 definitions when starting a trace run, and then will upload these
3040 upon reconnection to the target, resulting in a more accurate
3041 reconstruction of the tracepoints that are in use on the target.
3042
3043* Observer mode
3044
3045 You can now exercise direct control over the ways that GDB can
3046 affect your program. For instance, you can disallow the setting of
3047 breakpoints, so that the program can run continuously (assuming
3048 non-stop mode). In addition, the "observer" variable is available
3049 to switch all of the different controls; in observer mode, GDB
3050 cannot affect the target's behavior at all, which is useful for
3051 tasks like diagnosing live systems in the field.
3052
3053* The new convenience variable $_thread holds the number of the
3054 current thread.
3055
711e434b
PM
3056* New remote packets
3057
3058qGetTIBAddr
3059
3060 Return the address of the Windows Thread Information Block of a given thread.
3061
dde08ee1
PA
3062qRelocInsn
3063
3064 In response to several of the tracepoint packets, the target may now
3065 also respond with a number of intermediate `qRelocInsn' request
3066 packets before the final result packet, to have GDB handle
3067 relocating an instruction to execute at a different address. This
3068 is particularly useful for stubs that support fast tracepoints. GDB
3069 reports support for this feature in the qSupported packet.
3070
0fb4aa4b
PA
3071qTfSTM, qTsSTM
3072
3073 List static tracepoint markers in the target program.
3074
3075qTSTMat
3076
3077 List static tracepoint markers at a given address in the target
3078 program.
3079
3080qXfer:statictrace:read
3081
3082 Read the static trace data collected (by a `collect $_sdata'
3083 tracepoint action). The remote stub reports support for this packet
3084 to gdb's qSupported query.
3085
ca11e899
SS
3086QAllow
3087
3088 Send the current settings of GDB's permission flags.
3089
3090QTDPsrc
3091
3092 Send part of the source (textual) form of a tracepoint definition,
3093 which includes location, conditional, and action list.
3094
3f7b2faa
DE
3095* The source command now accepts a -s option to force searching for the
3096 script in the source search path even if the script name specifies
3097 a directory.
3098
d337e9f0
PA
3099* New features in the GDB remote stub, GDBserver
3100
0fb4aa4b
PA
3101 - GDBserver now support tracepoints (including fast tracepoints, and
3102 static tracepoints). The feature is currently supported by the
3103 i386-linux and amd64-linux builds. See the "Tracepoints support
3104 in gdbserver" section in the manual for more information.
3105
3106 GDBserver JIT compiles the tracepoint's conditional agent
3107 expression bytecode into native code whenever possible for low
3108 overhead dynamic tracepoints conditionals. For such tracepoints,
3109 an expression that examines program state is evaluated when the
3110 tracepoint is reached, in order to determine whether to capture
3111 trace data. If the condition is simple and false, processing the
3112 tracepoint finishes very quickly and no data is gathered.
3113
3114 GDBserver interfaces with the UST (LTTng Userspace Tracer) library
3115 for static tracepoints support.
d337e9f0 3116
c24d0242
PM
3117 - GDBserver now supports x86_64 Windows 64-bit debugging.
3118
c8d5aac9
L
3119* GDB now sends xmlRegisters= in qSupported packet to indicate that
3120 it understands register description.
3121
7c953934
TT
3122* The --batch flag now disables pagination and queries.
3123
8685c86f
L
3124* X86 general purpose registers
3125
3126 GDB now supports reading/writing byte, word and double-word x86
3127 general purpose registers directly. This means you can use, say,
3128 $ah or $ax to refer, respectively, to the byte register AH and
3129 16-bit word register AX that are actually portions of the 32-bit
3130 register EAX or 64-bit register RAX.
3131
95a42b64 3132* The `commands' command now accepts a range of breakpoints to modify.
86b17b60
PA
3133 A plain `commands' following a command that creates multiple
3134 breakpoints affects all the breakpoints set by that command. This
3135 applies to breakpoints set by `rbreak', and also applies when a
3136 single `break' command creates multiple breakpoints (e.g.,
3137 breakpoints on overloaded c++ functions).
95a42b64 3138
8bd10a10
CM
3139* The `rbreak' command now accepts a filename specification as part of
3140 its argument, limiting the functions selected by the regex to those
3141 in the specified file.
3142
ab38a727
PA
3143* Support for remote debugging Windows and SymbianOS shared libraries
3144 from Unix hosts has been improved. Non Windows GDB builds now can
3145 understand target reported file names that follow MS-DOS based file
3146 system semantics, such as file names that include drive letters and
3147 use the backslash character as directory separator. This makes it
3148 possible to transparently use the "set sysroot" and "set
3149 solib-search-path" on Unix hosts to point as host copies of the
3150 target's shared libraries. See the new command "set
3151 target-file-system-kind" described below, and the "Commands to
3152 specify files" section in the user manual for more information.
3153
6149aea9
PA
3154* New commands
3155
f1421989
HZ
3156eval template, expressions...
3157 Convert the values of one or more expressions under the control
3158 of the string template to a command line, and call it.
3159
ab38a727
PA
3160set target-file-system-kind unix|dos-based|auto
3161show target-file-system-kind
3162 Set or show the assumed file system kind for target reported file
3163 names.
3164
6149aea9
PA
3165save breakpoints <filename>
3166 Save all current breakpoint definitions to a file suitable for use
3167 in a later debugging session. To read the saved breakpoint
3168 definitions, use the `source' command.
3169
3170`save tracepoints' is a new alias for `save-tracepoints'. The latter
3171is now deprecated.
3172
0fb4aa4b
PA
3173info static-tracepoint-markers
3174 Display information about static tracepoint markers in the target.
3175
3176strace FN | FILE:LINE | *ADDR | -m MARKER_ID
3177 Define a static tracepoint by probing a marker at the given
3178 function, line, address, or marker ID.
3179
ca11e899
SS
3180set observer on|off
3181show observer
3182 Enable and disable observer mode.
3183
3184set may-write-registers on|off
3185set may-write-memory on|off
3186set may-insert-breakpoints on|off
3187set may-insert-tracepoints on|off
3188set may-insert-fast-tracepoints on|off
3189set may-interrupt on|off
3190 Set individual permissions for GDB effects on the target. Note that
3191 some of these settings can have undesirable or surprising
3192 consequences, particularly when changed in the middle of a session.
3193 For instance, disabling the writing of memory can prevent
3194 breakpoints from being inserted, cause single-stepping to fail, or
3195 even crash your program, if you disable after breakpoints have been
3196 inserted. However, GDB should not crash.
3197
3198set record memory-query on|off
3199show record memory-query
3200 Control whether to stop the inferior if memory changes caused
3201 by an instruction cannot be recorded.
3202
53a71c06
CR
3203* Changed commands
3204
3205disassemble
3206 The disassemble command now supports "start,+length" form of two arguments.
3207
f3e9a817
PM
3208* Python scripting
3209
9279c692
JB
3210** GDB now provides a new directory location, called the python directory,
3211 where Python scripts written for GDB can be installed. The location
3212 of that directory is <data-directory>/python, where <data-directory>
3213 is the GDB data directory. For more details, see section `Scripting
3214 GDB using Python' in the manual.
3215
adc36818 3216** The GDB Python API now has access to breakpoints, symbols, symbol
595939de
PM
3217 tables, program spaces, inferiors, threads and frame's code blocks.
3218 Additionally, GDB Parameters can now be created from the API, and
3219 manipulated via set/show in the CLI.
f870a310 3220
fa33c3cd 3221** New functions gdb.target_charset, gdb.target_wide_charset,
07ca107c
DE
3222 gdb.progspaces, gdb.current_progspace, and gdb.string_to_argv.
3223
3224** New exception gdb.GdbError.
fa33c3cd
DE
3225
3226** Pretty-printers are now also looked up in the current program space.
f3e9a817 3227
967cf477
DE
3228** Pretty-printers can now be individually enabled and disabled.
3229
8a1ea21f
DE
3230** GDB now looks for names of Python scripts to auto-load in a
3231 special section named `.debug_gdb_scripts', in addition to looking
3232 for a OBJFILE-gdb.py script when OBJFILE is read by the debugger.
3233
a7bdde9e
VP
3234* Tracepoint actions were unified with breakpoint commands. In particular,
3235there are no longer differences in "info break" output for breakpoints and
3236tracepoints and the "commands" command can be used for both tracepoints and
3237regular breakpoints.
3238
05071a4d
PA
3239* New targets
3240
3241ARM Symbian arm*-*-symbianelf*
3242
6aecb9c2
JB
3243* D language support.
3244 GDB now supports debugging programs written in the D programming
3245 language.
3246
431e49aa
TJB
3247* GDB now supports the extended ptrace interface for PowerPC which is
3248 available since Linux kernel version 2.6.34. This automatically enables
3249 any hardware breakpoints and additional hardware watchpoints available in
3250 the processor. The old ptrace interface exposes just one hardware
3251 watchpoint and no hardware breakpoints.
3252
3253* GDB is now able to use the Data Value Compare (DVC) register available on
3254 embedded PowerPC processors to implement in hardware simple watchpoint
3255 conditions of the form:
3256
3257 watch ADDRESS|VARIABLE if ADDRESS|VARIABLE == CONSTANT EXPRESSION
3258
3259 This works in native GDB running on Linux kernels with the extended ptrace
3260 interface mentioned above.
3261
bfbf3774 3262*** Changes in GDB 7.1
abc7453d 3263
4eef138c
TT
3264* C++ Improvements
3265
3266 ** Namespace Support
71dee663
SW
3267
3268 GDB now supports importing of namespaces in C++. This enables the
3269 user to inspect variables from imported namespaces. Support for
3270 namepace aliasing has also been added. So, if a namespace is
3271 aliased in the current scope (e.g. namepace C=A; ) the user can
3272 print variables using the alias (e.g. (gdb) print C::x).
3273
4eef138c
TT
3274 ** Bug Fixes
3275
3276 All known bugs relating to the printing of virtual base class were
3277 fixed. It is now possible to call overloaded static methods using a
3278 qualified name.
3279
3280 ** Cast Operators
3281
3282 The C++ cast operators static_cast<>, dynamic_cast<>, const_cast<>,
3283 and reinterpret_cast<> are now handled by the C++ expression parser.
3284
2d1c1221
ME
3285* New targets
3286
3287Xilinx MicroBlaze microblaze-*-*
34207b9e 3288Renesas RX rx-*-elf
2d1c1221
ME
3289
3290* New Simulators
3291
3292Xilinx MicroBlaze microblaze
34207b9e 3293Renesas RX rx
2d1c1221 3294
6c95b8df
PA
3295* Multi-program debugging.
3296
3297 GDB now has support for multi-program (a.k.a. multi-executable or
3298 multi-exec) debugging. This allows for debugging multiple inferiors
3299 simultaneously each running a different program under the same GDB
3300 session. See "Debugging Multiple Inferiors and Programs" in the
3301 manual for more information. This implied some user visible changes
3302 in the multi-inferior support. For example, "info inferiors" now
3303 lists inferiors that are not running yet or that have exited
3304 already. See also "New commands" and "New options" below.
3305
d5551862
SS
3306* New tracing features
3307
3308 GDB's tracepoint facility now includes several new features:
3309
3310 ** Trace state variables
f61e138d
SS
3311
3312 GDB tracepoints now include support for trace state variables, which
3313 are variables managed by the target agent during a tracing
3314 experiment. They are useful for tracepoints that trigger each
3315 other, so for instance one tracepoint can count hits in a variable,
3316 and then a second tracepoint has a condition that is true when the
3317 count reaches a particular value. Trace state variables share the
3318 $-syntax of GDB convenience variables, and can appear in both
3319 tracepoint actions and condition expressions. Use the "tvariable"
3320 command to create, and "info tvariables" to view; see "Trace State
3321 Variables" in the manual for more detail.
7a697b8d 3322
d5551862 3323 ** Fast tracepoints
7a697b8d
SS
3324
3325 GDB now includes an option for defining fast tracepoints, which
3326 targets may implement more efficiently, such as by installing a jump
3327 into the target agent rather than a trap instruction. The resulting
3328 speedup can be by two orders of magnitude or more, although the
3329 tradeoff is that some program locations on some target architectures
3330 might not allow fast tracepoint installation, for instance if the
3331 instruction to be replaced is shorter than the jump. To request a
3332 fast tracepoint, use the "ftrace" command, with syntax identical to
3333 the regular trace command.
3334
d5551862
SS
3335 ** Disconnected tracing
3336
3337 It is now possible to detach GDB from the target while it is running
3338 a trace experiment, then reconnect later to see how the experiment
3339 is going. In addition, a new variable disconnected-tracing lets you
3340 tell the target agent whether to continue running a trace if the
3341 connection is lost unexpectedly.
3342
00bf0b85
SS
3343 ** Trace files
3344
3345 GDB now has the ability to save the trace buffer into a file, and
3346 then use that file as a target, similarly to you can do with
3347 corefiles. You can select trace frames, print data that was
3348 collected in them, and use tstatus to display the state of the
3349 tracing run at the moment that it was saved. To create a trace
3350 file, use "tsave <filename>", and to use it, do "target tfile
3351 <name>".
4daf5ac0
SS
3352
3353 ** Circular trace buffer
3354
3355 You can ask the target agent to handle the trace buffer as a
3356 circular buffer, discarding the oldest trace frames to make room for
3357 newer ones, by setting circular-trace-buffer to on. This feature may
3358 not be available for all target agents.
3359
21a0512e
PP
3360* Changed commands
3361
3362disassemble
3363 The disassemble command, when invoked with two arguments, now requires
3364 the arguments to be comma-separated.
3365
0fe7935b
DJ
3366info variables
3367 The info variables command now displays variable definitions. Files
3368 which only declare a variable are not shown.
3369
fb2e7cb4
JB
3370source
3371 The source command is now capable of sourcing Python scripts.
3372 This feature is dependent on the debugger being build with Python
3373 support.
3374
3375 Related to this enhancement is also the introduction of a new command
3376 "set script-extension" (see below).
3377
6c95b8df
PA
3378* New commands (for set/show, see "New options" below)
3379
399cd161
MS
3380record save [<FILENAME>]
3381 Save a file (in core file format) containing the process record
3382 execution log for replay debugging at a later time.
3383
3384record restore <FILENAME>
3385 Restore the process record execution log that was saved at an
3386 earlier time, for replay debugging.
3387
6c95b8df
PA
3388add-inferior [-copies <N>] [-exec <FILENAME>]
3389 Add a new inferior.
3390
3391clone-inferior [-copies <N>] [ID]
3392 Make a new inferior ready to execute the same program another
3393 inferior has loaded.
3394
3395remove-inferior ID
3396 Remove an inferior.
3397
3398maint info program-spaces
3399 List the program spaces loaded into GDB.
3400
9a7071a8
JB
3401set remote interrupt-sequence [Ctrl-C | BREAK | BREAK-g]
3402show remote interrupt-sequence
3403 Allow the user to select one of ^C, a BREAK signal or BREAK-g
3404 as the sequence to the remote target in order to interrupt the execution.
3405 Ctrl-C is a default. Some system prefers BREAK which is high level of
3406 serial line for some certain time. Linux kernel prefers BREAK-g, a.k.a
3407 Magic SysRq g. It is BREAK signal and character 'g'.
3408
3409set remote interrupt-on-connect [on | off]
3410show remote interrupt-on-connect
3411 When interrupt-on-connect is ON, gdb sends interrupt-sequence to
3412 remote target when gdb connects to it. This is needed when you debug
3413 Linux kernel.
3414
3415set remotebreak [on | off]
3416show remotebreak
3417Deprecated. Use "set/show remote interrupt-sequence" instead.
3418
f61e138d
SS
3419tvariable $NAME [ = EXP ]
3420 Create or modify a trace state variable.
3421
3422info tvariables
3423 List trace state variables and their values.
3424
3425delete tvariable $NAME ...
3426 Delete one or more trace state variables.
3427
6da95a67
SS
3428teval EXPR, ...
3429 Evaluate the given expressions without collecting anything into the
3430 trace buffer. (Valid in tracepoint actions only.)
3431
7a697b8d
SS
3432ftrace FN / FILE:LINE / *ADDR
3433 Define a fast tracepoint at the given function, line, or address.
3434
b0f02ee9
JK
3435* New expression syntax
3436
3437 GDB now parses the 0b prefix of binary numbers the same way as GCC does.
3438 GDB now parses 0b101010 identically with 42.
3439
6c95b8df
PA
3440* New options
3441
3442set follow-exec-mode new|same
3443show follow-exec-mode
3444 Control whether GDB reuses the same inferior across an exec call or
3445 creates a new one. This is useful to be able to restart the old
3446 executable after the inferior having done an exec call.
3447
236f1d4d
SS
3448set default-collect EXPR, ...
3449show default-collect
3450 Define a list of expressions to be collected at each tracepoint.
3451 This is a useful way to ensure essential items are not overlooked,
3452 such as registers or a critical global variable.
3453
d5551862
SS
3454set disconnected-tracing
3455show disconnected-tracing
3456 If set to 1, the target is instructed to continue tracing if it
3457 loses its connection to GDB. If 0, the target is to stop tracing
3458 upon disconnection.
3459
4daf5ac0
SS
3460set circular-trace-buffer
3461show circular-trace-buffer
3462 If set to on, the target is instructed to use a circular trace buffer
3463 and discard the oldest trace frames instead of stopping the trace due
3464 to a full trace buffer. If set to off, the trace stops when the buffer
3465 fills up. Some targets may not support this.
3466
fb2e7cb4
JB
3467set script-extension off|soft|strict
3468show script-extension
3469 If set to "off", the debugger does not perform any script language
3470 recognition, and all sourced files are assumed to be GDB scripts.
3471 If set to "soft" (the default), files are sourced according to
3472 filename extension, falling back to GDB scripts if the first
3473 evaluation failed.
3474 If set to "strict", files are sourced according to filename extension.
3475
2b71fc8e
JB
3476set ada trust-PAD-over-XVS on|off
3477show ada trust-PAD-over-XVS
3478 If off, activate a workaround against a bug in the debugging information
3479 generated by the compiler for PAD types (see gcc/exp_dbug.ads in
3480 the GCC sources for more information about the GNAT encoding and
3481 PAD types in particular). It is always safe to set this option to
3482 off, but this introduces a slight performance penalty. The default
3483 is on.
3484
de2e5182
TT
3485* Python API Improvements
3486
3487 ** GDB provides the new class gdb.LazyString. This is useful in
3488 some pretty-printing cases. The new method gdb.Value.lazy_string
3489 provides a simple way to create objects of this type.
3490
3491 ** The fields returned by gdb.Type.fields now have an
3492 `is_base_class' attribute.
3493
3494 ** The new method gdb.Type.range returns the range of an array type.
3495
3496 ** The new method gdb.parse_and_eval can be used to parse and
3497 evaluate an expression.
3498
f61e138d
SS
3499* New remote packets
3500
3501QTDV
3502 Define a trace state variable.
3503
3504qTV
3505 Get the current value of a trace state variable.
3506
d5551862
SS
3507QTDisconnected
3508 Set desired tracing behavior upon disconnection.
3509
4daf5ac0
SS
3510QTBuffer:circular
3511 Set the trace buffer to be linear or circular.
3512
d5551862
SS
3513qTfP, qTsP
3514 Get data about the tracepoints currently in use.
3515
2d483d34
MS
3516* Bug fixes
3517
3518Process record now works correctly with hardware watchpoints.
3519
6e0e5977
JB
3520Multiple bug fixes have been made to the mips-irix port, making it
3521much more reliable. In particular:
3522 - Debugging threaded applications is now possible again. Previously,
3523 GDB would hang while starting the program, or while waiting for
3524 the program to stop at a breakpoint.
3525 - Attaching to a running process no longer hangs.
3526 - An error occurring while loading a core file has been fixed.
3527 - Changing the value of the PC register now works again. This fixes
3528 problems observed when using the "jump" command, or when calling
3529 a function from GDB, or even when assigning a new value to $pc.
3530 - With the "finish" and "return" commands, the return value for functions
3531 returning a small array is now correctly printed.
3532 - It is now possible to break on shared library code which gets executed
3533 during a shared library init phase (code executed while executing
3534 their .init section). Previously, the breakpoint would have no effect.
3535 - GDB is now able to backtrace through the signal handler for
3536 non-threaded programs.
3537
93c26624
JK
3538PIE (Position Independent Executable) programs debugging is now supported.
3539This includes debugging execution of PIC (Position Independent Code) shared
3540libraries although for that, it should be possible to run such libraries as an
3541executable program.
3542
abc7453d 3543*** Changes in GDB 7.0
75feb17d 3544
4efc6507
DE
3545* GDB now has an interface for JIT compilation. Applications that
3546dynamically generate code can create symbol files in memory and register
3547them with GDB. For users, the feature should work transparently, and
3548for JIT developers, the interface is documented in the GDB manual in the
3549"JIT Compilation Interface" chapter.
3550
782b2b07
SS
3551* Tracepoints may now be conditional. The syntax is as for
3552breakpoints; either an "if" clause appended to the "trace" command,
3553or the "condition" command is available. GDB sends the condition to
3554the target for evaluation using the same bytecode format as is used
3555for tracepoint actions.
3556
53a71c06
CR
3557* The disassemble command now supports: an optional /r modifier, print the
3558raw instructions in hex as well as in symbolic form, and an optional /m
3559modifier to print mixed source+assembly.
e6158f16 3560
e7a8dbfb
HZ
3561* Process record and replay
3562
3563 In a architecture environment that supports ``process record and
3564 replay'', ``process record and replay'' target can record a log of
3565 the process execution, and replay it with both forward and reverse
3566 execute commands.
3567
64644d9b
MS
3568* Reverse debugging: GDB now has new commands reverse-continue, reverse-
3569step, reverse-next, reverse-finish, reverse-stepi, reverse-nexti, and
3570set execution-direction {forward|reverse}, for targets that support
3571reverse execution.
3572
b9412953
DD
3573* GDB now supports hardware watchpoints on MIPS/Linux systems. This
3574feature is available with a native GDB running on kernel version
35752.6.28 or later.
3576
6c7a06a3
TT
3577* GDB now has support for multi-byte and wide character sets on the
3578target. Strings whose character type is wchar_t, char16_t, or
3579char32_t are now correctly printed. GDB supports wide- and unicode-
3580literals in C, that is, L'x', L"string", u'x', u"string", U'x', and
3581U"string" syntax. And, GDB allows the "%ls" and "%lc" formats in
3582`printf'. This feature requires iconv to work properly; if your
3583system does not have a working iconv, GDB can use GNU libiconv. See
3584the installation instructions for more information.
3585
f1838a98
UW
3586* GDB now supports automatic retrieval of shared library files from
3587remote targets. To use this feature, specify a system root that begins
3588with the `remote:' prefix, either via the `set sysroot' command or via
3589the `--with-sysroot' configure-time option.
3590
55333a84
DE
3591* "info sharedlibrary" now takes an optional regex of libraries to show,
3592and it now reports if a shared library has no debugging information.
3593
7f6a6314
PM
3594* Commands `set debug-file-directory', `set solib-search-path' and `set args'
3595now complete on file names.
3596
65d12d83
TT
3597* When completing in expressions, gdb will attempt to limit
3598completions to allowable structure or union fields, where appropriate.
3599For instance, consider:
3600
3601 # struct example { int f1; double f2; };
3602 # struct example variable;
3603 (gdb) p variable.
3604
3605If the user types TAB at the end of this command line, the available
3606completions will be "f1" and "f2".
3607
edb3359d
DJ
3608* Inlined functions are now supported. They show up in backtraces, and
3609the "step", "next", and "finish" commands handle them automatically.
3610
2fae03e8
TT
3611* GDB now supports the token-splicing (##) and stringification (#)
3612operators when expanding macros. It also supports variable-arity
3613macros.
3614
47a3467a 3615* GDB now supports inspecting extra signal information, exported by
58d6951d
DJ
3616the new $_siginfo convenience variable. The feature is currently
3617implemented on linux ARM, i386 and amd64.
3618
3619* GDB can now display the VFP floating point registers and NEON vector
3620registers on ARM targets. Both ARM GNU/Linux native GDB and gdbserver
3621can provide these registers (requires Linux 2.6.30 or later). Remote
3622and simulator targets may also provide them.
47a3467a 3623
08388c79
DE
3624* New remote packets
3625
3626qSearch:memory:
3627 Search memory for a sequence of bytes.
3628
a6f3e723
SL
3629QStartNoAckMode
3630 Turn off `+'/`-' protocol acknowledgments to permit more efficient
3631 operation over reliable transport links. Use of this packet is
3632 controlled by the `set remote noack-packet' command.
3633
d7713ae0
EZ
3634vKill
3635 Kill the process with the specified process ID. Use this in preference
3636 to `k' when multiprocess protocol extensions are supported.
3637
07e059b5
VP
3638qXfer:osdata:read
3639 Obtains additional operating system information
3640
47a3467a
PA
3641qXfer:siginfo:read
3642qXfer:siginfo:write
3643 Read or write additional signal information.
3644
060871df
PA
3645* Removed remote protocol undocumented extension
3646
3647 An undocumented extension to the remote protocol's `S' stop reply
3648 packet that permited the stub to pass a process id was removed.
3649 Remote servers should use the `T' stop reply packet instead.
3650
c055b101 3651* GDB now supports multiple function calling conventions according to the
a0ef4274 3652DWARF-2 DW_AT_calling_convention function attribute.
c055b101
CV
3653
3654* The SH target utilizes the aforementioned change to distinguish between gcc
a0ef4274
DJ
3655and Renesas calling convention. It also adds the new CLI commands
3656`set/show sh calling-convention'.
c055b101 3657
31fffb02
CS
3658* GDB can now read compressed debug sections, as produced by GNU gold
3659with the --compress-debug-sections=zlib flag.
3660
88d8a8e0
JB
3661* 64-bit core files are now supported on AIX.
3662
7f99b190
JB
3663* Thread switching is now supported on Tru64.
3664
ccd213ac
DJ
3665* Watchpoints can now be set on unreadable memory locations, e.g. addresses
3666which will be allocated using malloc later in program execution.
3667
1fddbabb 3668* The qXfer:libraries:read remote procotol packet now allows passing a
31fffb02 3669list of section offsets.
1fddbabb 3670
a0ef4274
DJ
3671* On GNU/Linux, GDB can now attach to stopped processes. Several race
3672conditions handling signals delivered during attach or thread creation
3673have also been fixed.
3674
bfb8797a 3675* GDB now supports the use of DWARF boolean types for Ada's type Boolean.
158c7665
PH
3676From the user's standpoint, all unqualified instances of True and False
3677are treated as the standard definitions, regardless of context.
bfb8797a 3678
71c25dea
TT
3679* GDB now parses C++ symbol and type names more flexibly. For
3680example, given:
3681
3682 template<typename T> class C { };
3683 C<char const *> c;
3684
3685GDB will now correctly handle all of:
3686
3687 ptype C<char const *>
3688 ptype C<char const*>
3689 ptype C<const char *>
3690 ptype C<const char*>
3691
ccd213ac
DJ
3692* New features in the GDB remote stub, gdbserver
3693
3694 - The "--wrapper" command-line argument tells gdbserver to use a
3695 wrapper program to launch programs for debugging.
3696
7ae0e2a2
UW
3697 - On PowerPC and S/390 targets, it is now possible to use a single
3698 gdbserver executable to debug both 32-bit and 64-bit programs.
3699 (This requires gdbserver itself to be built as a 64-bit executable.)
3700
a6f3e723
SL
3701 - gdbserver uses the new noack protocol mode for TCP connections to
3702 reduce communications latency, if also supported and enabled in GDB.
3703
da8bd9a3
DJ
3704 - Support for the sparc64-linux-gnu target is now included in
3705 gdbserver.
3706
d70e31dd
DE
3707 - The amd64-linux build of gdbserver now supports debugging both
3708 32-bit and 64-bit programs.
3709
3710 - The i386-linux, amd64-linux, and i386-win32 builds of gdbserver
3711 now support hardware watchpoints, and will use them automatically
3712 as appropriate.
3713
d57a3c85
TJB
3714* Python scripting
3715
3716 GDB now has support for scripting using Python. Whether this is
3717 available is determined at configure time.
3718
d8906c6f
TJB
3719 New GDB commands can now be written in Python.
3720
aadc346a
JB
3721* Ada tasking support
3722
3723 Ada tasks can now be inspected in GDB. The following commands have
3724 been introduced:
3725
3726 info tasks
3727 Print the list of Ada tasks.
3728 info task N
3729 Print detailed information about task number N.
3730 task
3731 Print the task number of the current task.
3732 task N
3733 Switch the context of debugging to task number N.
3734
adb483fe
DJ
3735* Support for user-defined prefixed commands. The "define" command can
3736add new commands to existing prefixes, e.g. "target".
3737
2277426b
PA
3738* Multi-inferior, multi-process debugging.
3739
3740 GDB now has generalized support for multi-inferior debugging. See
3741 "Debugging Multiple Inferiors" in the manual for more information.
3742 Although availability still depends on target support, the command
3743 set is more uniform now. The GNU/Linux specific multi-forks support
3744 has been migrated to this new framework. This implied some user
3745 visible changes; see "New commands" and also "Removed commands"
3746 below.
3747
08d16641
PA
3748* Target descriptions can now describe the target OS ABI. See the
3749"Target Description Format" section in the user manual for more
3750information.
3751
e35359c5
UW
3752* Target descriptions can now describe "compatible" architectures
3753to indicate that the target can execute applications for a different
3754architecture in addition to those for the main target architecture.
3755See the "Target Description Format" section in the user manual for
3756more information.
3757
85e747d2
UW
3758* Multi-architecture debugging.
3759
3760 GDB now includes general supports for debugging applications on
3761 hybrid systems that use more than one single processor architecture
3762 at the same time. Each such hybrid architecture still requires
3763 specific support to be added. The only hybrid architecture supported
3764 in this version of GDB is the Cell Broadband Engine.
3765
3766* GDB now supports integrated debugging of Cell/B.E. applications that
3767use both the PPU and SPU architectures. To enable support for hybrid
3768Cell/B.E. debugging, you need to configure GDB to support both the
3769powerpc-linux or powerpc64-linux and the spu-elf targets, using the
3770--enable-targets configure option.
3771
11ade57a
PA
3772* Non-stop mode debugging.
3773
3774 For some targets, GDB now supports an optional mode of operation in
3775 which you can examine stopped threads while other threads continue
3776 to execute freely. This is referred to as non-stop mode, with the
3777 old mode referred to as all-stop mode. See the "Non-Stop Mode"
3778 section in the user manual for more information.
3779
3780 To be able to support remote non-stop debugging, a remote stub needs
3781 to implement the non-stop mode remote protocol extensions, as
3782 described in the "Remote Non-Stop" section of the user manual. The
3783 GDB remote stub, gdbserver, has been adjusted to support these
3784 extensions on linux targets.
3785
d7713ae0 3786* New commands (for set/show, see "New options" below)
75feb17d 3787
a96d9b2e
SDJ
3788catch syscall [NAME(S) | NUMBER(S)]
3789 Catch system calls. Arguments, which should be names of system
3790 calls or their numbers, mean catch only those syscalls. Without
3791 arguments, every syscall will be caught. When the inferior issues
3792 any of the specified syscalls, GDB will stop and announce the system
3793 call, both when it is called and when its call returns. This
3794 feature is currently available with a native GDB running on the
3795 Linux Kernel, under the following architectures: x86, x86_64,
3796 PowerPC and PowerPC64.
3797
08388c79
DE
3798find [/size-char] [/max-count] start-address, end-address|+search-space-size,
3799 val1 [, val2, ...]
3800 Search memory for a sequence of bytes.
3801
d57a3c85
TJB
3802maint set python print-stack
3803maint show python print-stack
3804 Show a stack trace when an error is encountered in a Python script.
3805
3806python [CODE]
3807 Invoke CODE by passing it to the Python interpreter.
3808
d7713ae0
EZ
3809macro define
3810macro list
3811macro undef
3812 These allow macros to be defined, undefined, and listed
3813 interactively.
3814
3815info os processes
3816 Show operating system information about processes.
3817
2277426b
PA
3818info inferiors
3819 List the inferiors currently under GDB's control.
3820
3821inferior NUM
3822 Switch focus to inferior number NUM.
3823
3824detach inferior NUM
3825 Detach from inferior number NUM.
3826
3827kill inferior NUM
3828 Kill inferior number NUM.
3829
d7713ae0
EZ
3830* New options
3831
3285f3fe
UW
3832set spu stop-on-load
3833show spu stop-on-load
3834 Control whether to stop for new SPE threads during Cell/B.E. debugging.
3835
ff1a52c6
UW
3836set spu auto-flush-cache
3837show spu auto-flush-cache
3838 Control whether to automatically flush the software-managed cache
3839 during Cell/B.E. debugging.
3840
d7713ae0
EZ
3841set sh calling-convention
3842show sh calling-convention
3843 Control the calling convention used when calling SH target functions.
3844
e0a3ce09 3845set debug timestamp
75feb17d 3846show debug timestamp
d7713ae0
EZ
3847 Control display of timestamps with GDB debugging output.
3848
3849set disassemble-next-line
3850show disassemble-next-line
3851 Control display of disassembled source lines or instructions when
3852 the debuggee stops.
3853
3854set remote noack-packet
3855show remote noack-packet
3856 Set/show the use of remote protocol QStartNoAckMode packet. See above
3857 under "New remote packets."
3858
3859set remote query-attached-packet
3860show remote query-attached-packet
3861 Control use of remote protocol `qAttached' (query-attached) packet.
3862
3863set remote read-siginfo-object
3864show remote read-siginfo-object
3865 Control use of remote protocol `qXfer:siginfo:read' (read-siginfo-object)
3866 packet.
3867
3868set remote write-siginfo-object
3869show remote write-siginfo-object
3870 Control use of remote protocol `qXfer:siginfo:write' (write-siginfo-object)
3871 packet.
3872
40ab02ce
MS
3873set remote reverse-continue
3874show remote reverse-continue
3875 Control use of remote protocol 'bc' (reverse-continue) packet.
3876
3877set remote reverse-step
3878show remote reverse-step
3879 Control use of remote protocol 'bs' (reverse-step) packet.
3880
d7713ae0
EZ
3881set displaced-stepping
3882show displaced-stepping
3883 Control displaced stepping mode. Displaced stepping is a way to
3884 single-step over breakpoints without removing them from the debuggee.
3885 Also known as "out-of-line single-stepping".
3886
3887set debug displaced
3888show debug displaced
3889 Control display of debugging info for displaced stepping.
3890
3891maint set internal-error
3892maint show internal-error
3893 Control what GDB does when an internal error is detected.
3894
3895maint set internal-warning
3896maint show internal-warning
3897 Control what GDB does when an internal warning is detected.
75feb17d 3898
ccd213ac
DJ
3899set exec-wrapper
3900show exec-wrapper
3901unset exec-wrapper
3902 Use a wrapper program to launch programs for debugging.
fa4727a6 3903
aad4b048
JB
3904set multiple-symbols (all|ask|cancel)
3905show multiple-symbols
3906 The value of this variable can be changed to adjust the debugger behavior
3907 when an expression or a breakpoint location contains an ambiguous symbol
3908 name (an overloaded function name, for instance).
3909
74960c60
VP
3910set breakpoint always-inserted
3911show breakpoint always-inserted
3912 Keep breakpoints always inserted in the target, as opposed to inserting
3913 them when resuming the target, and removing them when the target stops.
3914 This option can improve debugger performance on slow remote targets.
3915
0428b8f5
DJ
3916set arm fallback-mode (arm|thumb|auto)
3917show arm fallback-mode
3918set arm force-mode (arm|thumb|auto)
3919show arm force-mode
3920 These commands control how ARM GDB determines whether instructions
3921 are ARM or Thumb. The default for both settings is auto, which uses
3922 the current CPSR value for instructions without symbols; previous
3923 versions of GDB behaved as if "set arm fallback-mode arm".
3924
10568435
JK
3925set disable-randomization
3926show disable-randomization
3927 Standalone programs run with the virtual address space randomization enabled
3928 by default on some platforms. This option keeps the addresses stable across
3929 multiple debugging sessions.
3930
d7713ae0
EZ
3931set non-stop
3932show non-stop
3933 Control whether other threads are stopped or not when some thread hits
3934 a breakpoint.
3935
b3eb342c 3936set target-async
d7713ae0 3937show target-async
b3eb342c
VP
3938 Requests that asynchronous execution is enabled in the target, if available.
3939 In this case, it's possible to resume target in the background, and interact
3940 with GDB while the target is running. "show target-async" displays the
3941 current state of asynchronous execution of the target.
3942
6c7a06a3
TT
3943set target-wide-charset
3944show target-wide-charset
3945 The target-wide-charset is the name of the character set that GDB
3946 uses when printing characters whose type is wchar_t.
3947
84603566
SL
3948set tcp auto-retry (on|off)
3949show tcp auto-retry
3950set tcp connect-timeout
3951show tcp connect-timeout
3952 These commands allow GDB to retry failed TCP connections to a remote stub
3953 with a specified timeout period; this is useful if the stub is launched
3954 in parallel with GDB but may not be ready to accept connections immediately.
3955
17a37d48
PP
3956set libthread-db-search-path
3957show libthread-db-search-path
3958 Control list of directories which GDB will search for appropriate
3959 libthread_db.
3960
d4db2f36
PA
3961set schedule-multiple (on|off)
3962show schedule-multiple
3963 Allow GDB to resume all threads of all processes or only threads of
3964 the current process.
3965
4e5d721f
DE
3966set stack-cache
3967show stack-cache
3968 Use more aggressive caching for accesses to the stack. This improves
3969 performance of remote debugging (particularly backtraces) without
3970 affecting correctness.
3971
910c5da8
JB
3972set interactive-mode (on|off|auto)
3973show interactive-mode
3974 Control whether GDB runs in interactive mode (on) or not (off).
3975 When in interactive mode, GDB waits for the user to answer all
3976 queries. Otherwise, GDB does not wait and assumes the default
3977 answer. When set to auto (the default), GDB determines which
3978 mode to use based on the stdin settings.
3979
2277426b
PA
3980* Removed commands
3981
3982info forks
3983 For program forks, this is replaced by the new more generic `info
3984 inferiors' command. To list checkpoints, you can still use the
3985 `info checkpoints' command, which was an alias for the `info forks'
3986 command.
3987
3988fork NUM
3989 Replaced by the new `inferior' command. To switch between
3990 checkpoints, you can still use the `restart' command, which was an
3991 alias for the `fork' command.
3992
3993process PID
3994 This is removed, since some targets don't have a notion of
3995 processes. To switch between processes, you can still use the
3996 `inferior' command using GDB's own inferior number.
3997
3998delete fork NUM
3999 For program forks, this is replaced by the new more generic `kill
4000 inferior' command. To delete a checkpoint, you can still use the
4001 `delete checkpoint' command, which was an alias for the `delete
4002 fork' command.
4003
4004detach fork NUM
4005 For program forks, this is replaced by the new more generic `detach
4006 inferior' command. To detach a checkpoint, you can still use the
4007 `detach checkpoint' command, which was an alias for the `detach
4008 fork' command.
4009
a80b95ba
TG
4010* New native configurations
4011
4012x86/x86_64 Darwin i[34567]86-*-darwin*
4013
b8bfd3ed
JB
4014x86_64 MinGW x86_64-*-mingw*
4015
75a2d5e7
TT
4016* New targets
4017
c28c63d8 4018Lattice Mico32 lm32-*
75a2d5e7 4019x86 DICOS i[34567]86-*-dicos*
4c1d2973 4020x86_64 DICOS x86_64-*-dicos*
5f814c3b 4021S+core 3 score-*-*
75a2d5e7 4022
6de3146c
PA
4023* The GDB remote stub, gdbserver, now supports x86 Windows CE
4024 (mingw32ce) debugging.
4025
d5cbbe6e
JB
4026* Removed commands
4027
4028catch load
4029catch unload
4030 These commands were actually not implemented on any target.
4031
75feb17d 4032*** Changes in GDB 6.8
f9ed52be 4033
af5ca30d
NH
4034* New native configurations
4035
4036NetBSD/hppa hppa*-*netbsd*
94a0e877 4037Xtensa GNU/Linux xtensa*-*-linux*
af5ca30d
NH
4038
4039* New targets
4040
4041NetBSD/hppa hppa*-*-netbsd*
94a0e877 4042Xtensa GNU/Lunux xtensa*-*-linux*
af5ca30d 4043
7a404eba
PA
4044* Change in command line behavior -- corefiles vs. process ids.
4045
4046 When the '-p NUMBER' or '--pid NUMBER' options are used, and
4047 attaching to process NUMBER fails, GDB no longer attempts to open a
4048 core file named NUMBER. Attaching to a program using the -c option
4049 is no longer supported. Instead, use the '-p' or '--pid' options.
4050
430ebac9
PA
4051* GDB can now be built as a native debugger for debugging Windows x86
4052(mingw32) Portable Executable (PE) programs.
4053
fe6fbf8b 4054* Pending breakpoints no longer change their number when their address
8d5f9c6f 4055is resolved.
fe6fbf8b
VP
4056
4057* GDB now supports breakpoints with multiple locations,
8d5f9c6f
DJ
4058including breakpoints on C++ constructors, inside C++ templates,
4059and in inlined functions.
fe6fbf8b 4060
10665d76
JB
4061* GDB's ability to debug optimized code has been improved. GDB more
4062accurately identifies function bodies and lexical blocks that occupy
4063more than one contiguous range of addresses.
4064
7cc46491
DJ
4065* Target descriptions can now describe registers for PowerPC.
4066
d71340b8
DJ
4067* The GDB remote stub, gdbserver, now supports the AltiVec and SPE
4068registers on PowerPC targets.
4069
523c4513
DJ
4070* The GDB remote stub, gdbserver, now supports thread debugging on GNU/Linux
4071targets even when the libthread_db library is not available.
4072
a6b151f1
DJ
4073* The GDB remote stub, gdbserver, now supports the new file transfer
4074commands (remote put, remote get, and remote delete).
4075
2d717e4f
DJ
4076* The GDB remote stub, gdbserver, now supports run and attach in
4077extended-remote mode.
4078
24a836bd 4079* hppa*64*-*-hpux11* target broken
d001be7a
DJ
4080The debugger is unable to start a program and fails with the following
4081error: "Error trying to get information about dynamic linker".
4082The gdb-6.7 release is also affected.
24a836bd 4083
d0c678e6
UW
4084* GDB now supports the --enable-targets= configure option to allow
4085building a single GDB executable that supports multiple remote
4086target architectures.
4087
d64a946d
TJB
4088* GDB now supports debugging C and C++ programs which use the
4089Decimal Floating Point extension. In addition, the PowerPC target
4090now has a set of pseudo-registers to inspect decimal float values
4091stored in two consecutive float registers.
4092
ee163bf5
VP
4093* The -break-insert MI command can optionally create pending
4094breakpoints now.
4095
b93b6ca7 4096* Improved support for debugging Ada
d001be7a
DJ
4097Many improvements to the Ada language support have been made. These
4098include:
b93b6ca7
JB
4099 - Better support for Ada2005 interface types
4100 - Improved handling of arrays and slices in general
4101 - Better support for Taft-amendment types
4102 - The '{type} ADDRESS' expression is now allowed on the left hand-side
4103 of an assignment
4104 - Improved command completion in Ada
4105 - Several bug fixes
4106
d001be7a
DJ
4107* GDB on GNU/Linux and HP/UX can now debug through "exec" of a new
4108process.
4109
a6b151f1
DJ
4110* New commands
4111
6d53d0af
JB
4112set print frame-arguments (all|scalars|none)
4113show print frame-arguments
4114 The value of this variable can be changed to control which argument
4115 values should be printed by the debugger when displaying a frame.
4116
a6b151f1
DJ
4117remote put
4118remote get
4119remote delete
4120 Transfer files to and from a remote target, and delete remote files.
4121
4122* New MI commands
4123
4124-target-file-put
4125-target-file-get
4126-target-file-delete
4127 Transfer files to and from a remote target, and delete remote files.
4128
4129* New remote packets
4130
4131vFile:open:
4132vFile:close:
4133vFile:pread:
4134vFile:pwrite:
4135vFile:unlink:
4136 Open, close, read, write, and delete files on the remote system.
d0c678e6 4137
2d717e4f
DJ
4138vAttach
4139 Attach to an existing process on the remote system, in extended-remote
4140 mode.
4141
4142vRun
4143 Run a new process on the remote system, in extended-remote mode.
4144
8d5f9c6f 4145*** Changes in GDB 6.7
6dd09645 4146
19d378fc
MS
4147* Resolved 101 resource leaks, null pointer dereferences, etc. in gdb,
4148bfd, libiberty and opcodes, as revealed by static analysis donated by
4149Coverity, Inc. (http://scan.coverity.com).
4150
3a40aaa0
UW
4151* When looking up multiply-defined global symbols, GDB will now prefer the
4152symbol definition in the current shared library if it was built using the
4153-Bsymbolic linker option.
4154
a6ec25f2
BW
4155* When the Text User Interface (TUI) is not configured, GDB will now
4156recognize the -tui command-line option and print a message that the TUI
4157is not supported.
4158
6dd09645
JB
4159* The GDB remote stub, gdbserver, now has lower overhead for high
4160frequency signals (e.g. SIGALRM) via the QPassSignals packet.
4161
c9bb8148
DJ
4162* GDB for MIPS targets now autodetects whether a remote target provides
416332-bit or 64-bit register values.
4164
0d5de010
DJ
4165* Support for C++ member pointers has been improved.
4166
23181151
DJ
4167* GDB now understands XML target descriptions, which specify the
4168target's overall architecture. GDB can read a description from
4169a local file or over the remote serial protocol.
4170
ea37ba09
DJ
4171* Vectors of single-byte data use a new integer type which is not
4172automatically displayed as character or string data.
4173
4174* The /s format now works with the print command. It displays
4175arrays of single-byte integers and pointers to single-byte integers
4176as strings.
e1f48ead 4177
123dc839
DJ
4178* Target descriptions can now describe target-specific registers,
4179for architectures which have implemented the support (currently
8d5f9c6f 4180only ARM, M68K, and MIPS).
123dc839 4181
05a4558a
DJ
4182* GDB and the GDB remote stub, gdbserver, now support the XScale
4183iWMMXt coprocessor.
fb1e4ffc 4184
7c963485
PA
4185* The GDB remote stub, gdbserver, has been updated to support
4186ARM Windows CE (mingw32ce) debugging, and GDB Windows CE support
4187has been rewritten to use the standard GDB remote protocol.
4188
b18be20d
DJ
4189* GDB can now step into C++ functions which are called through thunks.
4190
0ca420ce
UW
4191* GDB for the Cell/B.E. SPU now supports overlay debugging.
4192
31d99776
DJ
4193* The GDB remote protocol "qOffsets" packet can now honor ELF segment
4194layout. It also supports a TextSeg= and DataSeg= response when only
4195segment base addresses (rather than offsets) are available.
4196
a4642986
MR
4197* The /i format now outputs any trailing branch delay slot instructions
4198immediately following the last instruction within the count specified.
4199
cfa9d6d9
DJ
4200* The GDB remote protocol "T" stop reply packet now supports a
4201"library" response. Combined with the new "qXfer:libraries:read"
4202packet, this response allows GDB to debug shared libraries on targets
4203where the operating system manages the list of loaded libraries (e.g.
4204Windows and SymbianOS).
255e7678
DJ
4205
4206* The GDB remote stub, gdbserver, now supports dynamic link libraries
4207(DLLs) on Windows and Windows CE targets.
f5db8714
JK
4208
4209* GDB now supports a faster verification that a .debug file matches its binary
4210according to its build-id signature, if the signature is present.
cfa9d6d9 4211
c9bb8148
DJ
4212* New commands
4213
23776285
MR
4214set remoteflow
4215show remoteflow
4216 Enable or disable hardware flow control (RTS/CTS) on the serial port
4217 when debugging using remote targets.
4218
c9bb8148
DJ
4219set mem inaccessible-by-default
4220show mem inaccessible-by-default
4221 If the target supplies a memory map, for instance via the remote
4222 protocol's "qXfer:memory-map:read" packet, setting this variable
4223 prevents GDB from accessing memory outside the memory map. This
4224 is useful for targets with memory mapped registers or which react
4225 badly to accesses of unmapped address space.
4226
4227set breakpoint auto-hw
4228show breakpoint auto-hw
4229 If the target supplies a memory map, for instance via the remote
4230 protocol's "qXfer:memory-map:read" packet, setting this variable
4231 lets GDB use hardware breakpoints automatically for memory regions
4232 where it can not use software breakpoints. This covers both the
4233 "break" command and internal breakpoints used for other commands
4234 including "next" and "finish".
4235
0e420bd8
JB
4236catch exception
4237catch exception unhandled
4238 Stop the program execution when Ada exceptions are raised.
4239
4240catch assert
4241 Stop the program execution when an Ada assertion failed.
4242
f822c95b
DJ
4243set sysroot
4244show sysroot
4245 Set an alternate system root for target files. This is a more
4246 general version of "set solib-absolute-prefix", which is now
4247 an alias to "set sysroot".
4248
83cc5c53
UW
4249info spu
4250 Provide extended SPU facility status information. This set of
4251 commands is available only when debugging the Cell/B.E. SPU
4252 architecture.
4253
bd372731
MK
4254* New native configurations
4255
4256OpenBSD/sh sh*-*openbsd*
4257
23181151
DJ
4258set tdesc filename
4259unset tdesc filename
4260show tdesc filename
4261 Use the specified local file as an XML target description, and do
4262 not query the target for its built-in description.
4263
c9bb8148
DJ
4264* New targets
4265
54fe9172 4266OpenBSD/sh sh*-*-openbsd*
c9bb8148 4267MIPS64 GNU/Linux (gdbserver) mips64-linux-gnu
c077150c 4268Toshiba Media Processor mep-elf
c9bb8148 4269
6dd09645
JB
4270* New remote packets
4271
4272QPassSignals:
4273 Ignore the specified signals; pass them directly to the debugged program
4274 without stopping other threads or reporting them to GDB.
4275
23181151
DJ
4276qXfer:features:read:
4277 Read an XML target description from the target, which describes its
4278 features.
6dd09645 4279
83cc5c53
UW
4280qXfer:spu:read:
4281qXfer:spu:write:
4282 Read or write contents of an spufs file on the target system. These
4283 packets are available only on the Cell/B.E. SPU architecture.
4284
cfa9d6d9
DJ
4285qXfer:libraries:read:
4286 Report the loaded shared libraries. Combined with new "T" packet
4287 response, this packet allows GDB to debug shared libraries on
4288 targets where the operating system manages the list of loaded
4289 libraries (e.g. Windows and SymbianOS).
4290
483367ee
DJ
4291* Removed targets
4292
4293Support for these obsolete configurations has been removed.
4294
d08950c4
UW
4295alpha*-*-osf1*
4296alpha*-*-osf2*
7ce59000 4297d10v-*-*
483367ee
DJ
4298hppa*-*-hiux*
4299i[34567]86-ncr-*
4300i[34567]86-*-dgux*
4301i[34567]86-*-lynxos*
4302i[34567]86-*-netware*
4303i[34567]86-*-sco3.2v5*
4304i[34567]86-*-sco3.2v4*
4305i[34567]86-*-sco*
4306i[34567]86-*-sysv4.2*
4307i[34567]86-*-sysv4*
4308i[34567]86-*-sysv5*
4309i[34567]86-*-unixware2*
4310i[34567]86-*-unixware*
4311i[34567]86-*-sysv*
4312i[34567]86-*-isc*
4313m68*-cisco*-*
4314m68*-tandem-*
ad527d2e 4315mips*-*-pe
483367ee 4316rs6000-*-lynxos*
ad527d2e 4317sh*-*-pe
483367ee 4318
7ce59000
DJ
4319* Other removed features
4320
4321target abug
4322target cpu32bug
4323target est
4324target rom68k
4325
4326 Various m68k-only ROM monitors.
4327
ea35711c
DJ
4328target hms
4329target e7000
4330target sh3
4331target sh3e
4332
4333 Various Renesas ROM monitors and debugging interfaces for SH and
4334 H8/300.
4335
4336target ocd
4337
4338 Support for a Macraigor serial interface to on-chip debugging.
4339 GDB does not directly support the newer parallel or USB
4340 interfaces.
4341
7ce59000
DJ
4342DWARF 1 support
4343
4344 A debug information format. The predecessor to DWARF 2 and
4345 DWARF 3, which are still supported.
4346
54d61198
DJ
4347Support for the HP aCC compiler on HP-UX/PA-RISC
4348
4349 SOM-encapsulated symbolic debugging information, automatic
4350 invocation of pxdb, and the aCC custom C++ ABI. This does not
4351 affect HP-UX for Itanium or GCC for HP-UX/PA-RISC. Code compiled
4352 with aCC can still be debugged on an assembly level.
4353
ea35711c
DJ
4354MIPS ".pdr" sections
4355
4356 A MIPS-specific format used to describe stack frame layout
4357 in debugging information.
4358
4359Scheme support
4360
4361 GDB could work with an older version of Guile to debug
4362 the interpreter and Scheme programs running in it.
4363
1a69e1e4
DJ
4364set mips stack-arg-size
4365set mips saved-gpreg-size
4366
4367 Use "set mips abi" to control parameter passing for MIPS.
4368
6dd09645 4369*** Changes in GDB 6.6
e374b601 4370
ca3bf3bd
DJ
4371* New targets
4372
4373Xtensa xtensa-elf
9c309e77 4374Cell Broadband Engine SPU spu-elf
ca3bf3bd 4375
6aec2e11
DJ
4376* GDB can now be configured as a cross-debugger targeting native Windows
4377(mingw32) or Cygwin. It can communicate with a remote debugging stub
4378running on a Windows system over TCP/IP to debug Windows programs.
4379
4380* The GDB remote stub, gdbserver, has been updated to support Windows and
4381Cygwin debugging. Both single-threaded and multi-threaded programs are
4382supported.
4383
17218d91
DJ
4384* The "set trust-readonly-sections" command works again. This command was
4385broken in GDB 6.3, 6.4, and 6.5.
4386
9ebce043
DJ
4387* The "load" command now supports writing to flash memory, if the remote
4388stub provides the required support.
4389
7d3d3ece
DJ
4390* Support for GNU/Linux Thread Local Storage (TLS, per-thread variables) no
4391longer requires symbolic debug information (e.g. DWARF-2).
4392
4f8253f3
JB
4393* New commands
4394
4395set substitute-path
4396unset substitute-path
4397show substitute-path
4398 Manage a list of substitution rules that GDB uses to rewrite the name
4399 of the directories where the sources are located. This can be useful
4400 for instance when the sources were moved to a different location
4401 between compilation and debugging.
4402
9fa66fd7
AS
4403set trace-commands
4404show trace-commands
4405 Print each CLI command as it is executed. Each command is prefixed with
4406 a number of `+' symbols representing the nesting depth.
4407 The source command now has a `-v' option to enable the same feature.
4408
1f5befc1
DJ
4409* REMOVED features
4410
4411The ARM Demon monitor support (RDP protocol, "target rdp").
4412
2ec3381a
DJ
4413Kernel Object Display, an embedded debugging feature which only worked with
4414an obsolete version of Cisco IOS.
4415
3d00d119
DJ
4416The 'set download-write-size' and 'show download-write-size' commands.
4417
be2a5f71
DJ
4418* New remote packets
4419
4420qSupported:
4421 Tell a stub about GDB client features, and request remote target features.
4422 The first feature implemented is PacketSize, which allows the target to
4423 specify the size of packets it can handle - to minimize the number of
4424 packets required and improve performance when connected to a remote
4425 target.
4426
0876f84a
DJ
4427qXfer:auxv:read:
4428 Fetch an OS auxilliary vector from the remote stub. This packet is a
4429 more efficient replacement for qPart:auxv:read.
4430
9ebce043
DJ
4431qXfer:memory-map:read:
4432 Fetch a memory map from the remote stub, including information about
4433 RAM, ROM, and flash memory devices.
4434
4435vFlashErase:
4436vFlashWrite:
4437vFlashDone:
4438 Erase and program a flash memory device.
4439
0876f84a
DJ
4440* Removed remote packets
4441
4442qPart:auxv:read:
4443 This packet has been replaced by qXfer:auxv:read. Only GDB 6.4 and 6.5
4444 used it, and only gdbserver implemented it.
4445
e374b601 4446*** Changes in GDB 6.5
53e5f3cf 4447
96309189
MS
4448* New targets
4449
4450Renesas M32C/M16C m32c-elf
4451
4452Morpho Technologies ms1 ms1-elf
4453
53e5f3cf
AS
4454* New commands
4455
4456init-if-undefined Initialize a convenience variable, but
4457 only if it doesn't already have a value.
4458
ac264b3b
MS
4459The following commands are presently only implemented for native GNU/Linux:
4460
4461checkpoint Save a snapshot of the program state.
4462
4463restart <n> Return the program state to a
4464 previously saved state.
4465
4466info checkpoints List currently saved checkpoints.
4467
4468delete-checkpoint <n> Delete a previously saved checkpoint.
4469
4470set|show detach-on-fork Tell gdb whether to detach from a newly
4471 forked process, or to keep debugging it.
4472
4473info forks List forks of the user program that
4474 are available to be debugged.
4475
4476fork <n> Switch to debugging one of several
4477 forks of the user program that are
4478 available to be debugged.
4479
4480delete-fork <n> Delete a fork from the list of forks
4481 that are available to be debugged (and
4482 kill the forked process).
4483
4484detach-fork <n> Delete a fork from the list of forks
4485 that are available to be debugged (and
4486 allow the process to continue).
4487
3950dc3f
NS
4488* New architecture
4489
4490Morpho Technologies ms2 ms1-elf
4491
0ea3f30e
DJ
4492* Improved Windows host support
4493
4494GDB now builds as a cross debugger hosted on i686-mingw32, including
4495native console support, and remote communications using either
4496network sockets or serial ports.
4497
f79daebb
GM
4498* Improved Modula-2 language support
4499
4500GDB can now print most types in the Modula-2 syntax. This includes:
4501basic types, set types, record types, enumerated types, range types,
4502pointer types and ARRAY types. Procedure var parameters are correctly
4503printed and hexadecimal addresses and character constants are also
4504written in the Modula-2 syntax. Best results can be obtained by using
4505GNU Modula-2 together with the -gdwarf-2 command line option.
4506
acab6ab2
MM
4507* REMOVED features
4508
4509The ARM rdi-share module.
4510
f4267320
DJ
4511The Netware NLM debug server.
4512
53e5f3cf 4513*** Changes in GDB 6.4
156a53ca 4514
e0ecbda1
MK
4515* New native configurations
4516
02a677ac 4517OpenBSD/arm arm*-*-openbsd*
e0ecbda1
MK
4518OpenBSD/mips64 mips64-*-openbsd*
4519
d64a6579
KB
4520* New targets
4521
4522Morpho Technologies ms1 ms1-elf
4523
b33a6190
AS
4524* New command line options
4525
4526--batch-silent As for --batch, but totally silent.
4527--return-child-result The debugger will exist with the same value
4528 the child (debugged) program exited with.
4529--eval-command COMMAND, -ex COMMAND
4530 Execute a single GDB CLI command. This may be
4531 specified multiple times and in conjunction
4532 with the --command (-x) option.
4533
11dced61
AC
4534* Deprecated commands removed
4535
4536The following commands, that were deprecated in 2000, have been
4537removed:
4538
4539 Command Replacement
4540 set|show arm disassembly-flavor set|show arm disassembler
4541 othernames set arm disassembler
4542 set|show remotedebug set|show debug remote
4543 set|show archdebug set|show debug arch
4544 set|show eventdebug set|show debug event
4545 regs info registers
4546
6fe85783
MK
4547* New BSD user-level threads support
4548
4549It is now possible to debug programs using the user-level threads
4550library on OpenBSD and FreeBSD. Currently supported (target)
4551configurations are:
4552
4553FreeBSD/amd64 x86_64-*-freebsd*
4554FreeBSD/i386 i386-*-freebsd*
4555OpenBSD/i386 i386-*-openbsd*
4556
4557Note that the new kernel threads libraries introduced in FreeBSD 5.x
4558are not yet supported.
4559
5260ca71
MS
4560* New support for Matsushita MN10300 w/sim added
4561(Work in progress). mn10300-elf.
4562
e84ecc99
AC
4563* REMOVED configurations and files
4564
4565VxWorks and the XDR protocol *-*-vxworks
9445aa30 4566Motorola MCORE mcore-*-*
9445aa30 4567National Semiconductor NS32000 ns32k-*-*
156a53ca 4568
31e35378
JB
4569* New "set print array-indexes" command
4570
4571After turning this setting "on", GDB prints the index of each element
4572when displaying arrays. The default is "off" to preserve the previous
4573behavior.
4574
e85e5c83
MK
4575* VAX floating point support
4576
4577GDB now supports the not-quite-ieee VAX F and D floating point formats.
4578
d91e9901
AS
4579* User-defined command support
4580
4581In addition to using $arg0..$arg9 for argument passing, it is now possible
4582to use $argc to determine now many arguments have been passed. See the
4583section on user-defined commands in the user manual for more information.
4584
f2cb65ca
MC
4585*** Changes in GDB 6.3:
4586
f47b1503
AS
4587* New command line option
4588
4589GDB now accepts -l followed by a number to set the timeout for remote
4590debugging.
4591
f2cb65ca
MC
4592* GDB works with GCC -feliminate-dwarf2-dups
4593
4594GDB now supports a more compact representation of DWARF-2 debug
4595information using DW_FORM_ref_addr references. These are produced
4596by GCC with the option -feliminate-dwarf2-dups and also by some
4597proprietary compilers. With GCC, you must use GCC 3.3.4 or later
4598to use -feliminate-dwarf2-dups.
860660cb 4599
d08c0230
AC
4600* Internationalization
4601
4602When supported by the host system, GDB will be built with
4603internationalization (libintl). The task of marking up the sources is
4604continued, we're looking forward to our first translation.
4605
117ea3cf
PH
4606* Ada
4607
4608Initial support for debugging programs compiled with the GNAT
4609implementation of the Ada programming language has been integrated
4610into GDB. In this release, support is limited to expression evaluation.
4611
d08c0230
AC
4612* New native configurations
4613
4614GNU/Linux/m32r m32r-*-linux-gnu
4615
4616* Remote 'p' packet
4617
4618GDB's remote protocol now includes support for the 'p' packet. This
4619packet is used to fetch individual registers from a remote inferior.
4620
4621* END-OF-LIFE registers[] compatibility module
4622
4623GDB's internal register infrastructure has been completely rewritten.
4624The new infrastructure making possible the implementation of key new
4625features including 32x64 (e.g., 64-bit amd64 GDB debugging a 32-bit
4626i386 application).
4627
4628GDB 6.3 will be the last release to include the the registers[]
4629compatibility module that allowed out-of-date configurations to
4630continue to work. This change directly impacts the following
4631configurations:
4632
4633hppa-*-hpux
4634ia64-*-aix
4635mips-*-irix*
4636*-*-lynx
4637mips-*-linux-gnu
4638sds protocol
4639xdr protocol
4640powerpc bdm protocol
4641
4642Unless there is activity to revive these configurations, they will be
4643made OBSOLETE in GDB 6.4, and REMOVED from GDB 6.5.
4644
4645* OBSOLETE configurations and files
4646
4647Configurations that have been declared obsolete in this release have
4648been commented out. Unless there is activity to revive these
4649configurations, the next release of GDB will have their sources
4650permanently REMOVED.
4651
4652h8300-*-*
4653mcore-*-*
4654mn10300-*-*
4655ns32k-*-*
4656sh64-*-*
4657v850-*-*
4658
ebb7c577
AC
4659*** Changes in GDB 6.2.1:
4660
4661* MIPS `break main; run' gave an heuristic-fence-post warning
4662
4663When attempting to run even a simple program, a warning about
4664heuristic-fence-post being hit would be reported. This problem has
4665been fixed.
4666
4667* MIPS IRIX 'long double' crashed GDB
4668
4669When examining a long double variable, GDB would get a segmentation
4670fault. The crash has been fixed (but GDB 6.2 cannot correctly examine
4671IRIX long double values).
4672
4673* VAX and "next"
4674
4675A bug in the VAX stack code was causing problems with the "next"
4676command. This problem has been fixed.
4677
860660cb 4678*** Changes in GDB 6.2:
faae5abe 4679
0dea2468
AC
4680* Fix for ``many threads''
4681
4682On GNU/Linux systems that use the NPTL threads library, a program
4683rapidly creating and deleting threads would confuse GDB leading to the
4684error message:
4685
4686 ptrace: No such process.
4687 thread_db_get_info: cannot get thread info: generic error
4688
4689This problem has been fixed.
4690
2c07db7a
AC
4691* "-async" and "-noasync" options removed.
4692
4693Support for the broken "-noasync" option has been removed (it caused
4694GDB to dump core).
4695
c23968a2
JB
4696* New ``start'' command.
4697
4698This command runs the program until the begining of the main procedure.
4699
71009278
MK
4700* New BSD Kernel Data Access Library (libkvm) interface
4701
4702Using ``target kvm'' it is now possible to debug kernel core dumps and
4703live kernel memory images on various FreeBSD, NetBSD and OpenBSD
4704platforms. Currently supported (native-only) configurations are:
4705
4706FreeBSD/amd64 x86_64-*-freebsd*
4707FreeBSD/i386 i?86-*-freebsd*
4708NetBSD/i386 i?86-*-netbsd*
4709NetBSD/m68k m68*-*-netbsd*
4710NetBSD/sparc sparc-*-netbsd*
4711OpenBSD/amd64 x86_64-*-openbsd*
4712OpenBSD/i386 i?86-*-openbsd*
4713OpenBSD/m68k m68*-openbsd*
4714OpenBSD/sparc sparc-*-openbsd*
4715
3c0b7db2
AC
4716* Signal trampoline code overhauled
4717
4718Many generic problems with GDB's signal handling code have been fixed.
4719These include: backtraces through non-contiguous stacks; recognition
4720of sa_sigaction signal trampolines; backtrace from a NULL pointer
4721call; backtrace through a signal trampoline; step into and out of
4722signal handlers; and single-stepping in the signal trampoline.
4723
73cc75f3
AC
4724Please note that kernel bugs are a limiting factor here. These
4725features have been shown to work on an s390 GNU/Linux system that
4726include a 2.6.8-rc1 kernel. Ref PR breakpoints/1702.
3c0b7db2 4727
7243600a
BF
4728* Cygwin support for DWARF 2 added.
4729
6f606e1c
MK
4730* New native configurations
4731
97dc871c 4732GNU/Linux/hppa hppa*-*-linux*
0e56aeaf 4733OpenBSD/hppa hppa*-*-openbsd*
bf2ca189
MK
4734OpenBSD/m68k m68*-*-openbsd*
4735OpenBSD/m88k m88*-*-openbsd*
d195bc9f 4736OpenBSD/powerpc powerpc-*-openbsd*
6f606e1c 4737NetBSD/vax vax-*-netbsd*
9f076e7a 4738OpenBSD/vax vax-*-openbsd*
6f606e1c 4739
a1b461bf
AC
4740* END-OF-LIFE frame compatibility module
4741
4742GDB's internal frame infrastructure has been completely rewritten.
4743The new infrastructure making it possible to support key new features
4744including DWARF 2 Call Frame Information. To aid in the task of
4745migrating old configurations to this new infrastructure, a
4746compatibility module, that allowed old configurations to continue to
4747work, was also included.
4748
4749GDB 6.2 will be the last release to include this frame compatibility
4750module. This change directly impacts the following configurations:
4751
4752h8300-*-*
4753mcore-*-*
4754mn10300-*-*
4755ns32k-*-*
4756sh64-*-*
4757v850-*-*
4758xstormy16-*-*
4759
4760Unless there is activity to revive these configurations, they will be
4761made OBSOLETE in GDB 6.3, and REMOVED from GDB 6.4.
4762
3c7012f5
AC
4763* REMOVED configurations and files
4764
4765Sun 3, running SunOS 3 m68*-*-sunos3*
4766Sun 3, running SunOS 4 m68*-*-sunos4*
4767Sun 2, running SunOS 3 m68000-*-sunos3*
4768Sun 2, running SunOS 4 m68000-*-sunos4*
4769Motorola 680x0 running LynxOS m68*-*-lynxos*
4770AT&T 3b1/Unix pc m68*-att-*
4771Bull DPX2 (68k, System V release 3) m68*-bull-sysv*
4772decstation mips-dec-* mips-little-*
4773riscos mips-*-riscos* mips-*-sysv*
4774sonymips mips-sony-*
4775sysv mips*-*-sysv4* (IRIX 5/6 not included)
4776
e5fe55f7
AC
4777*** Changes in GDB 6.1.1:
4778
4779* TUI (Text-mode User Interface) built-in (also included in GDB 6.1)
4780
4781The TUI (Text-mode User Interface) is now built as part of a default
4782GDB configuration. It is enabled by either selecting the TUI with the
4783command line option "-i=tui" or by running the separate "gdbtui"
4784program. For more information on the TUI, see the manual "Debugging
4785with GDB".
4786
4787* Pending breakpoint support (also included in GDB 6.1)
4788
4789Support has been added to allow you to specify breakpoints in shared
4790libraries that have not yet been loaded. If a breakpoint location
4791cannot be found, and the "breakpoint pending" option is set to auto,
4792GDB queries you if you wish to make the breakpoint pending on a future
4793shared-library load. If and when GDB resolves the breakpoint symbol,
4794the pending breakpoint is removed as one or more regular breakpoints
4795are created.
4796
4797Pending breakpoints are very useful for GCJ Java debugging.
4798
4799* Fixed ISO-C build problems
4800
4801The files bfd/elf-bfd.h, gdb/dictionary.c and gdb/types.c contained
4802non ISO-C code that stopped them being built using a more strict ISO-C
4803compiler (e.g., IBM's C compiler).
4804
4805* Fixed build problem on IRIX 5
4806
4807Due to header problems with <sys/proc.h>, the file gdb/proc-api.c
4808wasn't able to compile compile on an IRIX 5 system.
4809
4810* Added execute permission to gdb/gdbserver/configure
4811
4812The shell script gdb/testsuite/gdb.stabs/configure lacked execute
4813permission. This bug would cause configure to fail on a number of
4814systems (Solaris, IRIX). Ref: server/519.
4815
4816* Fixed build problem on hpux2.0w-hp-hpux11.00 using the HP ANSI C compiler
4817
4818Older HPUX ANSI C compilers did not accept variable array sizes. somsolib.c
4819has been updated to use constant array sizes.
4820
4821* Fixed a panic in the DWARF Call Frame Info code on Solaris 2.7
4822
4823GCC 3.3.2, on Solaris 2.7, includes the DW_EH_PE_funcrel encoding in
4824its generated DWARF Call Frame Info. This encoding was causing GDB to
4825panic, that panic has been fixed. Ref: gdb/1628.
4826
4827* Fixed a problem when examining parameters in shared library code.
4828
4829When examining parameters in optimized shared library code generated
4830by a mainline GCC, GDB would incorrectly report ``Variable "..." is
4831not available''. GDB now correctly displays the variable's value.
4832
faae5abe 4833*** Changes in GDB 6.1:
f2c06f52 4834
9175c9a3
MC
4835* Removed --with-mmalloc
4836
4837Support for the mmalloc memory manager has been removed, as it
4838conflicted with the internal gdb byte cache.
4839
3cc87ec0
MK
4840* Changes in AMD64 configurations
4841
4842The AMD64 target now includes the %cs and %ss registers. As a result
4843the AMD64 remote protocol has changed; this affects the floating-point
4844and SSE registers. If you rely on those registers for your debugging,
4845you should upgrade gdbserver on the remote side.
4846
f0424ef6
MK
4847* Revised SPARC target
4848
4849The SPARC target has been completely revised, incorporating the
4850FreeBSD/sparc64 support that was added for GDB 6.0. As a result
03cebad2
MK
4851support for LynxOS and SunOS 4 has been dropped. Calling functions
4852from within GDB on operating systems with a non-executable stack
4853(Solaris, OpenBSD) now works.
f0424ef6 4854
59659be2
ILT
4855* New C++ demangler
4856
4857GDB has a new C++ demangler which does a better job on the mangled
4858names generated by current versions of g++. It also runs faster, so
4859with this and other changes gdb should now start faster on large C++
4860programs.
4861
9e08b29b
DJ
4862* DWARF 2 Location Expressions
4863
4864GDB support for location expressions has been extended to support function
4865arguments and frame bases. Older versions of GDB could crash when they
4866encountered these.
4867
8dfe8985
DC
4868* C++ nested types and namespaces
4869
4870GDB's support for nested types and namespaces in C++ has been
4871improved, especially if you use the DWARF 2 debugging format. (This
4872is the default for recent versions of GCC on most platforms.)
4873Specifically, if you have a class "Inner" defined within a class or
4874namespace "Outer", then GDB realizes that the class's name is
4875"Outer::Inner", not simply "Inner". This should greatly reduce the
4876frequency of complaints about not finding RTTI symbols. In addition,
4877if you are stopped at inside of a function defined within a namespace,
4878GDB modifies its name lookup accordingly.
4879
cced5e27
MK
4880* New native configurations
4881
4882NetBSD/amd64 x86_64-*-netbsd*
27d1e716 4883OpenBSD/amd64 x86_64-*-openbsd*
2031c21a 4884OpenBSD/alpha alpha*-*-openbsd*
f2cab569
MK
4885OpenBSD/sparc sparc-*-openbsd*
4886OpenBSD/sparc64 sparc64-*-openbsd*
cced5e27 4887
b4b4b794
KI
4888* New debugging protocols
4889
4890M32R with SDI protocol m32r-*-elf*
4891
7989c619
AC
4892* "set prompt-escape-char" command deleted.
4893
4894The command "set prompt-escape-char" has been deleted. This command,
4895and its very obscure effet on GDB's prompt, was never documented,
4896tested, nor mentioned in the NEWS file.
4897
5994185b
AC
4898* OBSOLETE configurations and files
4899
4900Configurations that have been declared obsolete in this release have
4901been commented out. Unless there is activity to revive these
4902configurations, the next release of GDB will have their sources
4903permanently REMOVED.
4904
4905Sun 3, running SunOS 3 m68*-*-sunos3*
4906Sun 3, running SunOS 4 m68*-*-sunos4*
4907Sun 2, running SunOS 3 m68000-*-sunos3*
4908Sun 2, running SunOS 4 m68000-*-sunos4*
4909Motorola 680x0 running LynxOS m68*-*-lynxos*
4910AT&T 3b1/Unix pc m68*-att-*
4911Bull DPX2 (68k, System V release 3) m68*-bull-sysv*
0748d941
AC
4912decstation mips-dec-* mips-little-*
4913riscos mips-*-riscos* mips-*-sysv*
4914sonymips mips-sony-*
4915sysv mips*-*-sysv4* (IRIX 5/6 not included)
5994185b 4916
0ddabb4c
AC
4917* REMOVED configurations and files
4918
4919SGI Irix-4.x mips-sgi-irix4 or iris4
4920SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris
4a8269c0
AC
4921Z8000 simulator z8k-zilog-none or z8ksim
4922Matsushita MN10200 w/simulator mn10200-*-*
4923H8/500 simulator h8500-hitachi-hms or h8500hms
4924HP/PA running BSD hppa*-*-bsd*
4925HP/PA running OSF/1 hppa*-*-osf*
4926HP/PA Pro target hppa*-*-pro*
4927PMAX (MIPS) running Mach 3.0 mips*-*-mach3*
cf7c5c23 4928386BSD i[3456]86-*-bsd*
4a8269c0
AC
4929Sequent family i[3456]86-sequent-sysv4*
4930 i[3456]86-sequent-sysv*
4931 i[3456]86-sequent-bsd*
f0424ef6
MK
4932SPARC running LynxOS sparc-*-lynxos*
4933SPARC running SunOS 4 sparc-*-sunos4*
4a8269c0
AC
4934Tsqware Sparclet sparclet-*-*
4935Fujitsu SPARClite sparclite-fujitsu-none or sparclite
0ddabb4c 4936
c7f1390e
DJ
4937*** Changes in GDB 6.0:
4938
1fe43d45
AC
4939* Objective-C
4940
4941Support for debugging the Objective-C programming language has been
4942integrated into GDB.
4943
e6beb428
AC
4944* New backtrace mechanism (includes DWARF 2 Call Frame Information).
4945
4946DWARF 2's Call Frame Information makes available compiler generated
4947information that more exactly describes the program's run-time stack.
4948By using this information, GDB is able to provide more robust stack
4949backtraces.
4950
4951The i386, amd64 (nee, x86-64), Alpha, m68hc11, ia64, and m32r targets
4952have been updated to use a new backtrace mechanism which includes
4953DWARF 2 CFI support.
4954
4955* Hosted file I/O.
4956
4957GDB's remote protocol has been extended to include support for hosted
4958file I/O (where the remote target uses GDB's file system). See GDB's
4959remote protocol documentation for details.
4960
4961* All targets using the new architecture framework.
4962
4963All of GDB's targets have been updated to use the new internal
4964architecture framework. The way is now open for future GDB releases
4965to include cross-architecture native debugging support (i386 on amd64,
4966ppc32 on ppc64).
4967
4968* GNU/Linux's Thread Local Storage (TLS)
4969
4970GDB now includes support for for the GNU/Linux implementation of
4971per-thread variables.
4972
4973* GNU/Linux's Native POSIX Thread Library (NPTL)
4974
4975GDB's thread code has been updated to work with either the new
4976GNU/Linux NPTL thread library or the older "LinuxThreads" library.
4977
4978* Separate debug info.
4979
4980GDB, in conjunction with BINUTILS, now supports a mechanism for
4981automatically loading debug information from a separate file. Instead
4982of shipping full debug and non-debug versions of system libraries,
4983system integrators can now instead ship just the stripped libraries
4984and optional debug files.
4985
4986* DWARF 2 Location Expressions
4987
4988DWARF 2 Location Expressions allow the compiler to more completely
4989describe the location of variables (even in optimized code) to the
4990debugger.
4991
4992GDB now includes preliminary support for location expressions (support
4993for DW_OP_piece is still missing).
4994
4995* Java
4996
4997A number of long standing bugs that caused GDB to die while starting a
4998Java application have been fixed. GDB's Java support is now
4999considered "useable".
5000
85f8f974
DJ
5001* GNU/Linux support for fork, vfork, and exec.
5002
5003The "catch fork", "catch exec", "catch vfork", and "set follow-fork-mode"
5004commands are now implemented for GNU/Linux. They require a 2.5.x or later
5005kernel.
5006
0fac0b41
DJ
5007* GDB supports logging output to a file
5008
5009There are two new commands, "set logging" and "show logging", which can be
5010used to capture GDB's output to a file.
f2c06f52 5011
6ad8ae5c
DJ
5012* The meaning of "detach" has changed for gdbserver
5013
5014The "detach" command will now resume the application, as documented. To
5015disconnect from gdbserver and leave it stopped, use the new "disconnect"
5016command.
5017
e286caf2 5018* d10v, m68hc11 `regs' command deprecated
5f601589
AC
5019
5020The `info registers' command has been updated so that it displays the
5021registers using a format identical to the old `regs' command.
5022
d28f9cdf
DJ
5023* Profiling support
5024
5025A new command, "maint set profile on/off", has been added. This command can
5026be used to enable or disable profiling while running GDB, to profile a
5027session or a set of commands. In addition there is a new configure switch,
5028"--enable-profiling", which will cause GDB to be compiled with profiling
5029data, for more informative profiling results.
5030
da0f9dcd
AC
5031* Default MI syntax changed to "mi2".
5032
5033The default MI (machine interface) syntax, enabled by the command line
5034option "-i=mi", has been changed to "mi2". The previous MI syntax,
b68767c1 5035"mi1", can be enabled by specifying the option "-i=mi1".
da0f9dcd
AC
5036
5037Support for the original "mi0" syntax (included in GDB 5.0) has been
5038removed.
5039
fb9b6b35
JJ
5040Fix for gdb/192: removed extraneous space when displaying frame level.
5041Fix for gdb/672: update changelist is now output in mi list format.
5042Fix for gdb/702: a -var-assign that updates the value now shows up
5043 in a subsequent -var-update.
5044
954a4db8
MK
5045* New native configurations.
5046
5047FreeBSD/amd64 x86_64-*-freebsd*
5048
6760f9e6
JB
5049* Multi-arched targets.
5050
b4263afa 5051HP/PA HPUX11 hppa*-*-hpux*
85a453d5 5052Renesas M32R/D w/simulator m32r-*-elf*
6760f9e6 5053
1b831c93
AC
5054* OBSOLETE configurations and files
5055
5056Configurations that have been declared obsolete in this release have
5057been commented out. Unless there is activity to revive these
5058configurations, the next release of GDB will have their sources
5059permanently REMOVED.
5060
8b0e5691 5061Z8000 simulator z8k-zilog-none or z8ksim
67f16606 5062Matsushita MN10200 w/simulator mn10200-*-*
fd2299bd 5063H8/500 simulator h8500-hitachi-hms or h8500hms
56056df7
AC
5064HP/PA running BSD hppa*-*-bsd*
5065HP/PA running OSF/1 hppa*-*-osf*
5066HP/PA Pro target hppa*-*-pro*
78c43945 5067PMAX (MIPS) running Mach 3.0 mips*-*-mach3*
2fbce691
AC
5068Sequent family i[3456]86-sequent-sysv4*
5069 i[3456]86-sequent-sysv*
5070 i[3456]86-sequent-bsd*
f81824a9
AC
5071Tsqware Sparclet sparclet-*-*
5072Fujitsu SPARClite sparclite-fujitsu-none or sparclite
fd2299bd 5073
5835abe7
NC
5074* REMOVED configurations and files
5075
5076V850EA ISA
1b831c93
AC
5077Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88
5078IBM AIX PS/2 i[3456]86-*-aix
5079i386 running Mach 3.0 i[3456]86-*-mach3*
5080i386 running Mach i[3456]86-*-mach*
5081i386 running OSF/1 i[3456]86-*osf1mk*
5082HP/Apollo 68k Family m68*-apollo*-sysv*,
5083 m68*-apollo*-bsd*,
5084 m68*-hp-bsd*, m68*-hp-hpux*
5085Argonaut Risc Chip (ARC) arc-*-*
5086Mitsubishi D30V d30v-*-*
5087Fujitsu FR30 fr30-*-elf*
5088OS/9000 i[34]86-*-os9k
5089I960 with MON960 i960-*-coff
5835abe7 5090
a094c6fb
AC
5091* MIPS $fp behavior changed
5092
5093The convenience variable $fp, for the MIPS, now consistently returns
5094the address of the current frame's base. Previously, depending on the
5095context, $fp could refer to either $sp or the current frame's base
5096address. See ``8.10 Registers'' in the manual ``Debugging with GDB:
5097The GNU Source-Level Debugger''.
5098
299ffc64 5099*** Changes in GDB 5.3:
37057839 5100
46248966
AC
5101* GNU/Linux shared library multi-threaded performance improved.
5102
5103When debugging a multi-threaded application on GNU/Linux, GDB now uses
5104`/proc', in preference to `ptrace' for memory reads. This may result
5105in an improvement in the start-up time of multi-threaded, shared
5106library applications when run under GDB. One GDB user writes: ``loads
5107shared libs like mad''.
5108
b9d14705 5109* ``gdbserver'' now supports multi-threaded applications on some targets
6da02953 5110
b9d14705
DJ
5111Support for debugging multi-threaded applications which use
5112the GNU/Linux LinuxThreads package has been added for
5113arm*-*-linux*-gnu*, i[3456]86-*-linux*-gnu*, mips*-*-linux*-gnu*,
5114powerpc*-*-linux*-gnu*, and sh*-*-linux*-gnu*.
6da02953 5115
e0e9281e
JB
5116* GDB now supports C/C++ preprocessor macros.
5117
5118GDB now expands preprocessor macro invocations in C/C++ expressions,
5119and provides various commands for showing macro definitions and how
5120they expand.
5121
dd73b9bb
AC
5122The new command `macro expand EXPRESSION' expands any macro
5123invocations in expression, and shows the result.
5124
5125The new command `show macro MACRO-NAME' shows the definition of the
5126macro named MACRO-NAME, and where it was defined.
5127
e0e9281e
JB
5128Most compilers don't include information about macros in the debugging
5129information by default. In GCC 3.1, for example, you need to compile
5130your program with the options `-gdwarf-2 -g3'. If the macro
5131information is present in the executable, GDB will read it.
5132
2250ee0c
CV
5133* Multi-arched targets.
5134
6e3ba3b8
JT
5135DEC Alpha (partial) alpha*-*-*
5136DEC VAX (partial) vax-*-*
2250ee0c 5137NEC V850 v850-*-*
6e3ba3b8 5138National Semiconductor NS32000 (partial) ns32k-*-*
a1789893
GS
5139Motorola 68000 (partial) m68k-*-*
5140Motorola MCORE mcore-*-*
2250ee0c 5141
cd9bfe15 5142* New targets.
e33ce519 5143
456f8b9d
DB
5144Fujitsu FRV architecture added by Red Hat frv*-*-*
5145
e33ce519 5146
da8ca43d
JT
5147* New native configurations
5148
5149Alpha NetBSD alpha*-*-netbsd*
029923d4 5150SH NetBSD sh*-*-netbsdelf*
45888261 5151MIPS NetBSD mips*-*-netbsd*
9ce5c36a 5152UltraSPARC NetBSD sparc64-*-netbsd*
da8ca43d 5153
cd9bfe15
AC
5154* OBSOLETE configurations and files
5155
5156Configurations that have been declared obsolete in this release have
5157been commented out. Unless there is activity to revive these
5158configurations, the next release of GDB will have their sources
5159permanently REMOVED.
5160
92eb23c5 5161Mitsubishi D30V d30v-*-*
a99a9e1b 5162OS/9000 i[34]86-*-os9k
1c7cc583 5163IBM AIX PS/2 i[3456]86-*-aix
7a3085c1 5164Fujitsu FR30 fr30-*-elf*
7fb623f7 5165Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88
eb4c54a2 5166Argonaut Risc Chip (ARC) arc-*-*
d8ee244c
MK
5167i386 running Mach 3.0 i[3456]86-*-mach3*
5168i386 running Mach i[3456]86-*-mach*
5169i386 running OSF/1 i[3456]86-*osf1mk*
822e978b
AC
5170HP/Apollo 68k Family m68*-apollo*-sysv*,
5171 m68*-apollo*-bsd*,
5172 m68*-hp-bsd*, m68*-hp-hpux*
4d210288 5173I960 with MON960 i960-*-coff
92eb23c5 5174
db034ac5
AC
5175* OBSOLETE languages
5176
5177CHILL, a Pascal like language used by telecommunications companies.
5178
cd9bfe15
AC
5179* REMOVED configurations and files
5180
5181AMD 29k family via UDI a29k-amd-udi, udi29k
5182A29K VxWorks a29k-*-vxworks
5183AMD 29000 embedded, using EBMON a29k-none-none
5184AMD 29000 embedded with COFF a29k-none-coff
5185AMD 29000 embedded with a.out a29k-none-aout
5186
5187testsuite/gdb.hp/gdb.threads-hp/ directory
5188
20f01a46
DH
5189* New command "set max-user-call-depth <nnn>"
5190
5191This command allows the user to limit the call depth of user-defined
5192commands. The default is 1024.
5193
a5941fbf
MK
5194* Changes in FreeBSD/i386 native debugging.
5195
5196Support for the "generate-core-file" has been added.
5197
89743e04
MS
5198* New commands "dump", "append", and "restore".
5199
5200These commands allow data to be copied from target memory
5201to a bfd-format or binary file (dump and append), and back
5202from a file into memory (restore).
37057839 5203
9fb14e79
JB
5204* Improved "next/step" support on multi-processor Alpha Tru64.
5205
5206The previous single-step mechanism could cause unpredictable problems,
5207including the random appearance of SIGSEGV or SIGTRAP signals. The use
5208of a software single-step mechanism prevents this.
5209
2037aebb
AC
5210*** Changes in GDB 5.2.1:
5211
5212* New targets.
5213
5214Atmel AVR avr*-*-*
5215
5216* Bug fixes
5217
5218gdb/182: gdb/323: gdb/237: On alpha, gdb was reporting:
5219mdebugread.c:2443: gdb-internal-error: sect_index_data not initialized
5220Fix, by Joel Brobecker imported from mainline.
5221
5222gdb/439: gdb/291: On some ELF object files, gdb was reporting:
5223dwarf2read.c:1072: gdb-internal-error: sect_index_text not initialize
5224Fix, by Fred Fish, imported from mainline.
5225
5226Dwarf2 .debug_frame & .eh_frame handler improved in many ways.
5227Surprisingly enough, it works now.
5228By Michal Ludvig, imported from mainline.
5229
5230i386 hardware watchpoint support:
5231avoid misses on second run for some targets.
5232By Pierre Muller, imported from mainline.
5233
37057839 5234*** Changes in GDB 5.2:
eb7cedd9 5235
1a703748
MS
5236* New command "set trust-readonly-sections on[off]".
5237
5238This command is a hint that tells gdb that read-only sections
5239really are read-only (ie. that their contents will not change).
5240In this mode, gdb will go to the object file rather than the
5241target to read memory from read-only sections (such as ".text").
5242This can be a significant performance improvement on some
5243(notably embedded) targets.
5244
cefd4ef5
MS
5245* New command "generate-core-file" (or "gcore").
5246
55241689
AC
5247This new gdb command allows the user to drop a core file of the child
5248process state at any time. So far it's been implemented only for
5249GNU/Linux and Solaris, but should be relatively easily ported to other
5250hosts. Argument is core file name (defaults to core.<pid>).
cefd4ef5 5251
352ed7b4
MS
5252* New command line option
5253
5254GDB now accepts --pid or -p followed by a process id.
5255
5256* Change in command line behavior -- corefiles vs. process ids.
5257
5258There is a subtle behavior in the way in which GDB handles
5259command line arguments. The first non-flag argument is always
5260a program to debug, but the second non-flag argument may either
5261be a corefile or a process id. Previously, GDB would attempt to
5262open the second argument as a corefile, and if that failed, would
5263issue a superfluous error message and then attempt to attach it as
5264a process. Now, if the second argument begins with a non-digit,
5265it will be treated as a corefile. If it begins with a digit,
5266GDB will attempt to attach it as a process, and if no such process
5267is found, will then attempt to open it as a corefile.
5268
fe419ffc
RE
5269* Changes in ARM configurations.
5270
5271Multi-arch support is enabled for all ARM configurations. The ARM/NetBSD
5272configuration is fully multi-arch.
5273
eb7cedd9
MK
5274* New native configurations
5275
fe419ffc 5276ARM NetBSD arm*-*-netbsd*
eb7cedd9 5277x86 OpenBSD i[3456]86-*-openbsd*
55241689 5278AMD x86-64 running GNU/Linux x86_64-*-linux-*
768f0842 5279Sparc64 running FreeBSD sparc64-*-freebsd*
eb7cedd9 5280
c9f63e6b
CV
5281* New targets
5282
5283Sanyo XStormy16 xstormy16-elf
5284
9b4ff276
AC
5285* OBSOLETE configurations and files
5286
5287Configurations that have been declared obsolete in this release have
5288been commented out. Unless there is activity to revive these
5289configurations, the next release of GDB will have their sources
5290permanently REMOVED.
5291
5292AMD 29k family via UDI a29k-amd-udi, udi29k
5293A29K VxWorks a29k-*-vxworks
5294AMD 29000 embedded, using EBMON a29k-none-none
5295AMD 29000 embedded with COFF a29k-none-coff
5296AMD 29000 embedded with a.out a29k-none-aout
5297
b4ceaee6 5298testsuite/gdb.hp/gdb.threads-hp/ directory
9b4ff276 5299
e2caac18
AC
5300* REMOVED configurations and files
5301
5302TI TMS320C80 tic80-*-*
7bc65f05 5303WDC 65816 w65-*-*
7768dd6c
AC
5304PowerPC Solaris powerpcle-*-solaris*
5305PowerPC Windows NT powerpcle-*-cygwin32
5306PowerPC Netware powerpc-*-netware*
5e734e1f 5307Harris/CXUX m88k m88*-harris-cxux*
1406caf7
AC
5308Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-*
5309 ns32k-utek-sysv* ns32k-utek-*
7e24f0b1 5310SunOS 4.0.Xi on i386 i[3456]86-*-sunos*
9b567150 5311Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern*
3680c638
AC
5312Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news
5313ISI Optimum V (3.05) under 4.3bsd. m68*-isi-*
a752853e 5314Apple Macintosh (MPW) host and target N/A host, powerpc-*-macos*
e2caac18 5315
c2a727fa
TT
5316* Changes to command line processing
5317
5318The new `--args' feature can be used to specify command-line arguments
5319for the inferior from gdb's command line.
5320
467d8519
TT
5321* Changes to key bindings
5322
5323There is a new `operate-and-get-next' function bound to `C-o'.
5324
7072a954
AC
5325*** Changes in GDB 5.1.1
5326
5327Fix compile problem on DJGPP.
5328
5329Fix a problem with floating-point registers on the i386 being
5330corrupted.
5331
5332Fix to stop GDB crashing on .debug_str debug info.
5333
5334Numerous documentation fixes.
5335
5336Numerous testsuite fixes.
5337
34f47bc4 5338*** Changes in GDB 5.1:
139760b7
MK
5339
5340* New native configurations
5341
5342Alpha FreeBSD alpha*-*-freebsd*
5343x86 FreeBSD 3.x and 4.x i[3456]86*-freebsd[34]*
55241689 5344MIPS GNU/Linux mips*-*-linux*
e23194cb
EZ
5345MIPS SGI Irix 6.x mips*-sgi-irix6*
5346ia64 AIX ia64-*-aix*
55241689 5347s390 and s390x GNU/Linux {s390,s390x}-*-linux*
139760b7 5348
bf64bfd6
AC
5349* New targets
5350
def90278 5351Motorola 68HC11 and 68HC12 m68hc11-elf
24be5c34 5352CRIS cris-axis
55241689 5353UltraSparc running GNU/Linux sparc64-*-linux*
def90278 5354
17e78a56 5355* OBSOLETE configurations and files
bf64bfd6
AC
5356
5357x86 FreeBSD before 2.2 i[3456]86*-freebsd{1,2.[01]}*,
9b9c068d 5358Harris/CXUX m88k m88*-harris-cxux*
bb19ff3b
AC
5359Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-*
5360 ns32k-utek-sysv* ns32k-utek-*
76f4ea53
AC
5361TI TMS320C80 tic80-*-*
5362WDC 65816 w65-*-*
4a1968f4 5363Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern*
1b2b2c16
AC
5364PowerPC Solaris powerpcle-*-solaris*
5365PowerPC Windows NT powerpcle-*-cygwin32
5366PowerPC Netware powerpc-*-netware*
24f89b68 5367SunOS 4.0.Xi on i386 i[3456]86-*-sunos*
514e603d
AC
5368Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news
5369ISI Optimum V (3.05) under 4.3bsd. m68*-isi-*
d036b4d9 5370Apple Macintosh (MPW) host N/A
bf64bfd6 5371
17e78a56
AC
5372stuff.c (Program to stuff files into a specially prepared space in kdb)
5373kdb-start.c (Main loop for the standalone kernel debugger)
5374
7fcca85b
AC
5375Configurations that have been declared obsolete in this release have
5376been commented out. Unless there is activity to revive these
5377configurations, the next release of GDB will have their sources
5378permanently REMOVED.
5379
a196c81c 5380* REMOVED configurations and files
7fcca85b
AC
5381
5382Altos 3068 m68*-altos-*
5383Convex c1-*-*, c2-*-*
5384Pyramid pyramid-*-*
5385ARM RISCix arm-*-* (as host)
5386Tahoe tahoe-*-*
a196c81c 5387ser-ocd.c *-*-*
bf64bfd6 5388
6d6b80e5 5389* GDB has been converted to ISO C.
e23194cb 5390
6d6b80e5 5391GDB's source code has been converted to ISO C. In particular, the
e23194cb
EZ
5392sources are fully protoized, and rely on standard headers being
5393present.
5394
bf64bfd6
AC
5395* Other news:
5396
e23194cb
EZ
5397* "info symbol" works on platforms which use COFF, ECOFF, XCOFF, and NLM.
5398
5399* The MI enabled by default.
5400
5401The new machine oriented interface (MI) introduced in GDB 5.0 has been
5402revised and enabled by default. Packages which use GDB as a debugging
5403engine behind a UI or another front end are encouraged to switch to
5404using the GDB/MI interface, instead of the old annotations interface
5405which is now deprecated.
5406
5407* Support for debugging Pascal programs.
5408
5409GDB now includes support for debugging Pascal programs. The following
5410main features are supported:
5411
5412 - Pascal-specific data types such as sets;
5413
5414 - automatic recognition of Pascal sources based on file-name
5415 extension;
5416
5417 - Pascal-style display of data types, variables, and functions;
5418
5419 - a Pascal expression parser.
5420
5421However, some important features are not yet supported.
5422
5423 - Pascal string operations are not supported at all;
5424
5425 - there are some problems with boolean types;
5426
5427 - Pascal type hexadecimal constants are not supported
5428 because they conflict with the internal variables format;
5429
5430 - support for Pascal objects and classes is not full yet;
5431
5432 - unlike Pascal, GDB is case-sensitive for symbol names.
5433
5434* Changes in completion.
5435
5436Commands such as `shell', `run' and `set args', which pass arguments
5437to inferior programs, now complete on file names, similar to what
5438users expect at the shell prompt.
5439
5440Commands which accept locations, such as `disassemble', `print',
5441`breakpoint', `until', etc. now complete on filenames as well as
5442program symbols. Thus, if you type "break foob TAB", and the source
5443files linked into the programs include `foobar.c', that file name will
5444be one of the candidates for completion. However, file names are not
5445considered for completion after you typed a colon that delimits a file
5446name from a name of a function in that file, as in "break foo.c:bar".
5447
5448`set demangle-style' completes on available demangling styles.
5449
5450* New platform-independent commands:
5451
5452It is now possible to define a post-hook for a command as well as a
5453hook that runs before the command. For more details, see the
5454documentation of `hookpost' in the GDB manual.
5455
5456* Changes in GNU/Linux native debugging.
5457
d7275149
MK
5458Support for debugging multi-threaded programs has been completely
5459revised for all platforms except m68k and sparc. You can now debug as
5460many threads as your system allows you to have.
5461
e23194cb
EZ
5462Attach/detach is supported for multi-threaded programs.
5463
d7275149
MK
5464Support for SSE registers was added for x86. This doesn't work for
5465multi-threaded programs though.
e23194cb
EZ
5466
5467* Changes in MIPS configurations.
bf64bfd6
AC
5468
5469Multi-arch support is enabled for all MIPS configurations.
5470
e23194cb
EZ
5471GDB can now be built as native debugger on SGI Irix 6.x systems for
5472debugging n32 executables. (Debugging 64-bit executables is not yet
5473supported.)
5474
5475* Unified support for hardware watchpoints in all x86 configurations.
5476
5477Most (if not all) native x86 configurations support hardware-assisted
5478breakpoints and watchpoints in a unified manner. This support
5479implements debug register sharing between watchpoints, which allows to
5480put a virtually infinite number of watchpoints on the same address,
5481and also supports watching regions up to 16 bytes with several debug
5482registers.
5483
5484The new maintenance command `maintenance show-debug-regs' toggles
5485debugging print-outs in functions that insert, remove, and test
5486watchpoints and hardware breakpoints.
5487
5488* Changes in the DJGPP native configuration.
5489
5490New command ``info dos sysinfo'' displays assorted information about
5491the CPU, OS, memory, and DPMI server.
5492
5493New commands ``info dos gdt'', ``info dos ldt'', and ``info dos idt''
5494display information about segment descriptors stored in GDT, LDT, and
5495IDT.
5496
5497New commands ``info dos pde'' and ``info dos pte'' display entries
5498from Page Directory and Page Tables (for now works with CWSDPMI only).
5499New command ``info dos address-pte'' displays the Page Table entry for
5500a given linear address.
5501
5502GDB can now pass command lines longer than 126 characters to the
5503program being debugged (requires an update to the libdbg.a library
5504which is part of the DJGPP development kit).
5505
5506DWARF2 debug info is now supported.
5507
6c56c069
EZ
5508It is now possible to `step' and `next' through calls to `longjmp'.
5509
e23194cb
EZ
5510* Changes in documentation.
5511
5512All GDB documentation was converted to GFDL, the GNU Free
5513Documentation License.
5514
5515Tracepoints-related commands are now fully documented in the GDB
5516manual.
5517
5518TUI, the Text-mode User Interface, is now documented in the manual.
5519
5520Tracepoints-related commands are now fully documented in the GDB
5521manual.
5522
5523The "GDB Internals" manual now has an index. It also includes
5524documentation of `ui_out' functions, GDB coding standards, x86
5525hardware watchpoints, and memory region attributes.
5526
5d6640b1
AC
5527* GDB's version number moved to ``version.in''
5528
5529The Makefile variable VERSION has been replaced by the file
5530``version.in''. People creating GDB distributions should update the
5531contents of this file.
5532
1a1d8446
AC
5533* gdba.el deleted
5534
5535GUD support is now a standard part of the EMACS distribution.
139760b7 5536
9debab2f 5537*** Changes in GDB 5.0:
7a292a7a 5538
c63ce875
EZ
5539* Improved support for debugging FP programs on x86 targets
5540
5541Unified and much-improved support for debugging floating-point
5542programs on all x86 targets. In particular, ``info float'' now
5543displays the FP registers in the same format on all x86 targets, with
5544greater level of detail.
5545
5546* Improvements and bugfixes in hardware-assisted watchpoints
5547
5548It is now possible to watch array elements, struct members, and
5549bitfields with hardware-assisted watchpoints. Data-read watchpoints
5550on x86 targets no longer erroneously trigger when the address is
5551written.
5552
5553* Improvements in the native DJGPP version of GDB
5554
5555The distribution now includes all the scripts and auxiliary files
5556necessary to build the native DJGPP version on MS-DOS/MS-Windows
5557machines ``out of the box''.
5558
5559The DJGPP version can now debug programs that use signals. It is
5560possible to catch signals that happened in the debuggee, deliver
5561signals to it, interrupt it with Ctrl-C, etc. (Previously, a signal
5562would kill the program being debugged.) Programs that hook hardware
5563interrupts (keyboard, timer, etc.) can also be debugged.
5564
5565It is now possible to debug DJGPP programs that redirect their
5566standard handles or switch them to raw (as opposed to cooked) mode, or
5567even close them. The command ``run < foo > bar'' works as expected,
5568and ``info terminal'' reports useful information about the debuggee's
5569terminal, including raw/cooked mode, redirection, etc.
5570
5571The DJGPP version now uses termios functions for console I/O, which
5572enables debugging graphics programs. Interrupting GDB with Ctrl-C
5573also works.
5574
5575DOS-style file names with drive letters are now fully supported by
5576GDB.
5577
5578It is now possible to debug DJGPP programs that switch their working
5579directory. It is also possible to rerun the debuggee any number of
5580times without restarting GDB; thus, you can use the same setup,
5581breakpoints, etc. for many debugging sessions.
5582
ed9a39eb
JM
5583* New native configurations
5584
5585ARM GNU/Linux arm*-*-linux*
afc05dd4 5586PowerPC GNU/Linux powerpc-*-linux*
ed9a39eb 5587
7a292a7a
SS
5588* New targets
5589
96baa820 5590Motorola MCore mcore-*-*
adf40b2e
JM
5591x86 VxWorks i[3456]86-*-vxworks*
5592PowerPC VxWorks powerpc-*-vxworks*
7a292a7a
SS
5593TI TMS320C80 tic80-*-*
5594
085dd6e6
JM
5595* OBSOLETE configurations
5596
5597Altos 3068 m68*-altos-*
5598Convex c1-*-*, c2-*-*
9846de1b 5599Pyramid pyramid-*-*
ed9a39eb 5600ARM RISCix arm-*-* (as host)
104c1213 5601Tahoe tahoe-*-*
7a292a7a 5602
9debab2f
AC
5603Configurations that have been declared obsolete will be commented out,
5604but the code will be left in place. If there is no activity to revive
5605these configurations before the next release of GDB, the sources will
5606be permanently REMOVED.
5607
5330533d
SS
5608* Gould support removed
5609
5610Support for the Gould PowerNode and NP1 has been removed.
5611
bc9e5bbf
AC
5612* New features for SVR4
5613
5614On SVR4 native platforms (such as Solaris), if you attach to a process
5615without first loading a symbol file, GDB will now attempt to locate and
5616load symbols from the running process's executable file.
5617
5618* Many C++ enhancements
5619
5620C++ support has been greatly improved. Overload resolution now works properly
5621in almost all cases. RTTI support is on the way.
5622
adf40b2e
JM
5623* Remote targets can connect to a sub-program
5624
5625A popen(3) style serial-device has been added. This device starts a
5626sub-process (such as a stand-alone simulator) and then communicates
5627with that. The sub-program to run is specified using the syntax
5628``|<program> <args>'' vis:
5629
5630 (gdb) set remotedebug 1
5631 (gdb) target extended-remote |mn10300-elf-sim program-args
5632
43e526b9
JM
5633* MIPS 64 remote protocol
5634
5635A long standing bug in the mips64 remote protocol where by GDB
5636expected certain 32 bit registers (ex SR) to be transfered as 32
5637instead of 64 bits has been fixed.
5638
5639The command ``set remote-mips64-transfers-32bit-regs on'' has been
5640added to provide backward compatibility with older versions of GDB.
5641
96baa820
JM
5642* ``set remotebinarydownload'' replaced by ``set remote X-packet''
5643
5644The command ``set remotebinarydownload'' command has been replaced by
5645``set remote X-packet''. Other commands in ``set remote'' family
5646include ``set remote P-packet''.
5647
11cf8741
JM
5648* Breakpoint commands accept ranges.
5649
5650The breakpoint commands ``enable'', ``disable'', and ``delete'' now
5651accept a range of breakpoints, e.g. ``5-7''. The tracepoint command
5652``tracepoint passcount'' also accepts a range of tracepoints.
5653
7876dd43
DB
5654* ``apropos'' command added.
5655
5656The ``apropos'' command searches through command names and
5657documentation strings, printing out matches, making it much easier to
5658try to find a command that does what you are looking for.
5659
bc9e5bbf
AC
5660* New MI interface
5661
5662A new machine oriented interface (MI) has been added to GDB. This
5663interface is designed for debug environments running GDB as a separate
7162c0ca
EZ
5664process. This is part of the long term libGDB project. See the
5665"GDB/MI" chapter of the GDB manual for further information. It can be
5666enabled by configuring with:
bc9e5bbf
AC
5667
5668 .../configure --enable-gdbmi
5669
c906108c
SS
5670*** Changes in GDB-4.18:
5671
5672* New native configurations
5673
5674HP-UX 10.20 hppa*-*-hpux10.20
5675HP-UX 11.x hppa*-*-hpux11.0*
55241689 5676M68K GNU/Linux m68*-*-linux*
c906108c
SS
5677
5678* New targets
5679
5680Fujitsu FR30 fr30-*-elf*
5681Intel StrongARM strongarm-*-*
5682Mitsubishi D30V d30v-*-*
5683
5684* OBSOLETE configurations
5685
5686Gould PowerNode, NP1 np1-*-*, pn-*-*
5687
5688Configurations that have been declared obsolete will be commented out,
5689but the code will be left in place. If there is no activity to revive
5690these configurations before the next release of GDB, the sources will
5691be permanently REMOVED.
5692
5693* ANSI/ISO C
5694
5695As a compatibility experiment, GDB's source files buildsym.h and
5696buildsym.c have been converted to pure standard C, no longer
5697containing any K&R compatibility code. We believe that all systems in
5698use today either come with a standard C compiler, or have a GCC port
5699available. If this is not true, please report the affected
5700configuration to bug-gdb@gnu.org immediately. See the README file for
5701information about getting a standard C compiler if you don't have one
5702already.
5703
5704* Readline 2.2
5705
5706GDB now uses readline 2.2.
5707
5708* set extension-language
5709
5710You can now control the mapping between filename extensions and source
5711languages by using the `set extension-language' command. For instance,
5712you can ask GDB to treat .c files as C++ by saying
5713 set extension-language .c c++
5714The command `info extensions' lists all of the recognized extensions
5715and their associated languages.
5716
5717* Setting processor type for PowerPC and RS/6000
5718
5719When GDB is configured for a powerpc*-*-* or an rs6000*-*-* target,
5720you can use the `set processor' command to specify what variant of the
5721PowerPC family you are debugging. The command
5722
5723 set processor NAME
5724
5725sets the PowerPC/RS6000 variant to NAME. GDB knows about the
5726following PowerPC and RS6000 variants:
5727
5728 ppc-uisa PowerPC UISA - a PPC processor as viewed by user-level code
5729 rs6000 IBM RS6000 ("POWER") architecture, user-level view
5730 403 IBM PowerPC 403
5731 403GC IBM PowerPC 403GC
5732 505 Motorola PowerPC 505
5733 860 Motorola PowerPC 860 or 850
5734 601 Motorola PowerPC 601
5735 602 Motorola PowerPC 602
5736 603 Motorola/IBM PowerPC 603 or 603e
5737 604 Motorola PowerPC 604 or 604e
5738 750 Motorola/IBM PowerPC 750 or 750
5739
5740At the moment, this command just tells GDB what to name the
5741special-purpose processor registers. Since almost all the affected
5742registers are inaccessible to user-level programs, this command is
5743only useful for remote debugging in its present form.
5744
5745* HP-UX support
5746
5747Thanks to a major code donation from Hewlett-Packard, GDB now has much
5748more extensive support for HP-UX. Added features include shared
5749library support, kernel threads and hardware watchpoints for 11.00,
5750support for HP's ANSI C and C++ compilers, and a compatibility mode
5751for xdb and dbx commands.
5752
5753* Catchpoints
5754
5755HP's donation includes the new concept of catchpoints, which is a
5756generalization of the old catch command. On HP-UX, it is now possible
5757to catch exec, fork, and vfork, as well as library loading.
5758
5759This means that the existing catch command has changed; its first
5760argument now specifies the type of catch to be set up. See the
5761output of "help catch" for a list of catchpoint types.
5762
5763* Debugging across forks
5764
5765On HP-UX, you can choose which process to debug when a fork() happens
5766in the inferior.
5767
5768* TUI
5769
5770HP has donated a curses-based terminal user interface (TUI). To get
5771it, build with --enable-tui. Although this can be enabled for any
5772configuration, at present it only works for native HP debugging.
5773
5774* GDB remote protocol additions
5775
5776A new protocol packet 'X' that writes binary data is now available.
5777Default behavior is to try 'X', then drop back to 'M' if the stub
5778fails to respond. The settable variable `remotebinarydownload'
5779allows explicit control over the use of 'X'.
5780
5781For 64-bit targets, the memory packets ('M' and 'm') can now contain a
5782full 64-bit address. The command
5783
5784 set remoteaddresssize 32
5785
5786can be used to revert to the old behaviour. For existing remote stubs
5787the change should not be noticed, as the additional address information
5788will be discarded.
5789
5790In order to assist in debugging stubs, you may use the maintenance
5791command `packet' to send any text string to the stub. For instance,
5792
5793 maint packet heythere
5794
5795sends the packet "$heythere#<checksum>". Note that it is very easy to
5796disrupt a debugging session by sending the wrong packet at the wrong
5797time.
5798
5799The compare-sections command allows you to compare section data on the
5800target to what is in the executable file without uploading or
5801downloading, by comparing CRC checksums.
5802
5803* Tracing can collect general expressions
5804
5805You may now collect general expressions at tracepoints. This requires
5806further additions to the target-side stub; see tracepoint.c and
5807doc/agentexpr.texi for further details.
5808
5809* mask-address variable for Mips
5810
5811For Mips targets, you may control the zeroing of the upper 32 bits of
5812a 64-bit address by entering `set mask-address on'. This is mainly
5813of interest to users of embedded R4xxx and R5xxx processors.
5814
5815* Higher serial baud rates
5816
5817GDB's serial code now allows you to specify baud rates 57600, 115200,
5818230400, and 460800 baud. (Note that your host system may not be able
5819to achieve all of these rates.)
5820
5821* i960 simulator
5822
5823The i960 configuration now includes an initial implementation of a
5824builtin simulator, contributed by Jim Wilson.
5825
5826
5827*** Changes in GDB-4.17:
5828
5829* New native configurations
5830
5831Alpha GNU/Linux alpha*-*-linux*
5832Unixware 2.x i[3456]86-unixware2*
5833Irix 6.x mips*-sgi-irix6*
5834PowerPC GNU/Linux powerpc-*-linux*
5835PowerPC Solaris powerpcle-*-solaris*
5836Sparc GNU/Linux sparc-*-linux*
5837Motorola sysV68 R3V7.1 m68k-motorola-sysv
5838
5839* New targets
5840
5841Argonaut Risc Chip (ARC) arc-*-*
5842Hitachi H8/300S h8300*-*-*
5843Matsushita MN10200 w/simulator mn10200-*-*
5844Matsushita MN10300 w/simulator mn10300-*-*
5845MIPS NEC VR4100 mips64*vr4100*{,el}-*-elf*
5846MIPS NEC VR5000 mips64*vr5000*{,el}-*-elf*
5847MIPS Toshiba TX39 mips64*tx39*{,el}-*-elf*
5848Mitsubishi D10V w/simulator d10v-*-*
5849Mitsubishi M32R/D w/simulator m32r-*-elf*
5850Tsqware Sparclet sparclet-*-*
5851NEC V850 w/simulator v850-*-*
5852
5853* New debugging protocols
5854
5855ARM with RDI protocol arm*-*-*
5856M68K with dBUG monitor m68*-*-{aout,coff,elf}
5857DDB and LSI variants of PMON protocol mips*-*-*
5858PowerPC with DINK32 monitor powerpc{,le}-*-eabi
5859PowerPC with SDS protocol powerpc{,le}-*-eabi
5860Macraigor OCD (Wiggler) devices powerpc{,le}-*-eabi
5861
5862* DWARF 2
5863
5864All configurations can now understand and use the DWARF 2 debugging
5865format. The choice is automatic, if the symbol file contains DWARF 2
5866information.
5867
5868* Java frontend
5869
5870GDB now includes basic Java language support. This support is
5871only useful with Java compilers that produce native machine code.
5872
5873* solib-absolute-prefix and solib-search-path
5874
5875For SunOS and SVR4 shared libraries, you may now set the prefix for
5876loading absolute shared library symbol files, and the search path for
5877locating non-absolute shared library symbol files.
5878
5879* Live range splitting
5880
5881GDB can now effectively debug code for which GCC has performed live
5882range splitting as part of its optimization. See gdb/doc/LRS for
5883more details on the expected format of the stabs information.
5884
5885* Hurd support
5886
5887GDB's support for the GNU Hurd, including thread debugging, has been
5888updated to work with current versions of the Hurd.
5889
5890* ARM Thumb support
5891
5892GDB's ARM target configuration now handles the ARM7T (Thumb) 16-bit
5893instruction set. ARM GDB automatically detects when Thumb
5894instructions are in use, and adjusts disassembly and backtracing
5895accordingly.
5896
5897* MIPS16 support
5898
5899GDB's MIPS target configurations now handle the MIP16 16-bit
5900instruction set.
5901
5902* Overlay support
5903
5904GDB now includes support for overlays; if an executable has been
5905linked such that multiple sections are based at the same address, GDB
5906will decide which section to use for symbolic info. You can choose to
5907control the decision manually, using overlay commands, or implement
5908additional target-side support and use "overlay load-target" to bring
5909in the overlay mapping. Do "help overlay" for more detail.
5910
5911* info symbol
5912
5913The command "info symbol <address>" displays information about
5914the symbol at the specified address.
5915
5916* Trace support
5917
5918The standard remote protocol now includes an extension that allows
5919asynchronous collection and display of trace data. This requires
5920extensive support in the target-side debugging stub. Tracing mode
5921includes a new interaction mode in GDB and new commands: see the
5922file tracepoint.c for more details.
5923
5924* MIPS simulator
5925
5926Configurations for embedded MIPS now include a simulator contributed
5927by Cygnus Solutions. The simulator supports the instruction sets
5928of most MIPS variants.
5929
5930* Sparc simulator
5931
5932Sparc configurations may now include the ERC32 simulator contributed
5933by the European Space Agency. The simulator is not built into
5934Sparc targets by default; configure with --enable-sim to include it.
5935
5936* set architecture
5937
5938For target configurations that may include multiple variants of a
5939basic architecture (such as MIPS and SH), you may now set the
5940architecture explicitly. "set arch" sets, "info arch" lists
5941the possible architectures.
5942
5943*** Changes in GDB-4.16:
5944
5945* New native configurations
5946
5947Windows 95, x86 Windows NT i[345]86-*-cygwin32
5948M68K NetBSD m68k-*-netbsd*
5949PowerPC AIX 4.x powerpc-*-aix*
5950PowerPC MacOS powerpc-*-macos*
5951PowerPC Windows NT powerpcle-*-cygwin32
5952RS/6000 AIX 4.x rs6000-*-aix4*
5953
5954* New targets
5955
5956ARM with RDP protocol arm-*-*
5957I960 with MON960 i960-*-coff
5958MIPS VxWorks mips*-*-vxworks*
5959MIPS VR4300 with PMON mips64*vr4300{,el}-*-elf*
5960PowerPC with PPCBUG monitor powerpc{,le}-*-eabi*
5961Hitachi SH3 sh-*-*
5962Matra Sparclet sparclet-*-*
5963
5964* PowerPC simulator
5965
5966The powerpc-eabi configuration now includes the PSIM simulator,
5967contributed by Andrew Cagney, with assistance from Mike Meissner.
5968PSIM is a very elaborate model of the PowerPC, including not only
5969basic instruction set execution, but also details of execution unit
5970performance and I/O hardware. See sim/ppc/README for more details.
5971
5972* Solaris 2.5
5973
5974GDB now works with Solaris 2.5.
5975
5976* Windows 95/NT native
5977
5978GDB will now work as a native debugger on Windows 95 and Windows NT.
5979To build it from source, you must use the "gnu-win32" environment,
5980which uses a DLL to emulate enough of Unix to run the GNU tools.
5981Further information, binaries, and sources are available at
5982ftp.cygnus.com, under pub/gnu-win32.
5983
5984* dont-repeat command
5985
5986If a user-defined command includes the command `dont-repeat', then the
5987command will not be repeated if the user just types return. This is
5988useful if the command is time-consuming to run, so that accidental
5989extra keystrokes don't run the same command many times.
5990
5991* Send break instead of ^C
5992
5993The standard remote protocol now includes an option to send a break
5994rather than a ^C to the target in order to interrupt it. By default,
5995GDB will send ^C; to send a break, set the variable `remotebreak' to 1.
5996
5997* Remote protocol timeout
5998
5999The standard remote protocol includes a new variable `remotetimeout'
6000that allows you to set the number of seconds before GDB gives up trying
6001to read from the target. The default value is 2.
6002
6003* Automatic tracking of dynamic object loading (HPUX and Solaris only)
6004
6005By default GDB will automatically keep track of objects as they are
6006loaded and unloaded by the dynamic linker. By using the command `set
6007stop-on-solib-events 1' you can arrange for GDB to stop the inferior
6008when shared library events occur, thus allowing you to set breakpoints
6009in shared libraries which are explicitly loaded by the inferior.
6010
6011Note this feature does not work on hpux8. On hpux9 you must link
6012/usr/lib/end.o into your program. This feature should work
6013automatically on hpux10.
6014
6015* Irix 5.x hardware watchpoint support
6016
6017Irix 5 configurations now support the use of hardware watchpoints.
6018
6019* Mips protocol "SYN garbage limit"
6020
6021When debugging a Mips target using the `target mips' protocol, you
6022may set the number of characters that GDB will ignore by setting
6023the `syn-garbage-limit'. A value of -1 means that GDB will ignore
6024every character. The default value is 1050.
6025
6026* Recording and replaying remote debug sessions
6027
6028If you set `remotelogfile' to the name of a file, gdb will write to it
6029a recording of a remote debug session. This recording may then be
6030replayed back to gdb using "gdbreplay". See gdbserver/README for
6031details. This is useful when you have a problem with GDB while doing
6032remote debugging; you can make a recording of the session and send it
6033to someone else, who can then recreate the problem.
6034
6035* Speedups for remote debugging
6036
6037GDB includes speedups for downloading and stepping MIPS systems using
6038the IDT monitor, fast downloads to the Hitachi SH E7000 emulator,
6039and more efficient S-record downloading.
6040
6041* Memory use reductions and statistics collection
6042
6043GDB now uses less memory and reports statistics about memory usage.
6044Try the `maint print statistics' command, for example.
6045
6046*** Changes in GDB-4.15:
6047
6048* Psymtabs for XCOFF
6049
6050The symbol reader for AIX GDB now uses partial symbol tables. This
6051can greatly improve startup time, especially for large executables.
6052
6053* Remote targets use caching
6054
6055Remote targets now use a data cache to speed up communication with the
6056remote side. The data cache could lead to incorrect results because
6057it doesn't know about volatile variables, thus making it impossible to
6058debug targets which use memory mapped I/O devices. `set remotecache
6059off' turns the the data cache off.
6060
6061* Remote targets may have threads
6062
6063The standard remote protocol now includes support for multiple threads
6064in the target system, using new protocol commands 'H' and 'T'. See
6065gdb/remote.c for details.
6066
6067* NetROM support
6068
6069If GDB is configured with `--enable-netrom', then it will include
6070support for the NetROM ROM emulator from XLNT Designs. The NetROM
6071acts as though it is a bank of ROM on the target board, but you can
6072write into it over the network. GDB's support consists only of
6073support for fast loading into the emulated ROM; to debug, you must use
6074another protocol, such as standard remote protocol. The usual
6075sequence is something like
6076
6077 target nrom <netrom-hostname>
6078 load <prog>
6079 target remote <netrom-hostname>:1235
6080
6081* Macintosh host
6082
6083GDB now includes support for the Apple Macintosh, as a host only. It
6084may be run as either an MPW tool or as a standalone application, and
6085it can debug through the serial port. All the usual GDB commands are
6086available, but to the target command, you must supply "serial" as the
6087device type instead of "/dev/ttyXX". See mpw-README in the main
6088directory for more information on how to build. The MPW configuration
6089scripts */mpw-config.in support only a few targets, and only the
6090mips-idt-ecoff target has been tested.
6091
6092* Autoconf
6093
6094GDB configuration now uses autoconf. This is not user-visible,
6095but does simplify configuration and building.
6096
6097* hpux10
6098
6099GDB now supports hpux10.
6100
6101*** Changes in GDB-4.14:
6102
6103* New native configurations
6104
6105x86 FreeBSD i[345]86-*-freebsd
6106x86 NetBSD i[345]86-*-netbsd
6107NS32k NetBSD ns32k-*-netbsd
6108Sparc NetBSD sparc-*-netbsd
6109
6110* New targets
6111
6112A29K VxWorks a29k-*-vxworks
6113HP PA PRO embedded (WinBond W89K & Oki OP50N) hppa*-*-pro*
6114CPU32 EST-300 emulator m68*-*-est*
6115PowerPC ELF powerpc-*-elf
6116WDC 65816 w65-*-*
6117
6118* Alpha OSF/1 support for procfs
6119
6120GDB now supports procfs under OSF/1-2.x and higher, which makes it
6121possible to attach to running processes. As the mounting of the /proc
6122filesystem is optional on the Alpha, GDB automatically determines
6123the availability of /proc during startup. This can lead to problems
6124if /proc is unmounted after GDB has been started.
6125
6126* Arguments to user-defined commands
6127
6128User commands may accept up to 10 arguments separated by whitespace.
6129Arguments are accessed within the user command via $arg0..$arg9. A
6130trivial example:
6131define adder
6132 print $arg0 + $arg1 + $arg2
6133
6134To execute the command use:
6135adder 1 2 3
6136
6137Defines the command "adder" which prints the sum of its three arguments.
6138Note the arguments are text substitutions, so they may reference variables,
6139use complex expressions, or even perform inferior function calls.
6140
6141* New `if' and `while' commands
6142
6143This makes it possible to write more sophisticated user-defined
6144commands. Both commands take a single argument, which is the
6145expression to evaluate, and must be followed by the commands to
6146execute, one per line, if the expression is nonzero, the list being
6147terminated by the word `end'. The `if' command list may include an
6148`else' word, which causes the following commands to be executed only
6149if the expression is zero.
6150
6151* Fortran source language mode
6152
6153GDB now includes partial support for Fortran 77. It will recognize
6154Fortran programs and can evaluate a subset of Fortran expressions, but
6155variables and functions may not be handled correctly. GDB will work
6156with G77, but does not yet know much about symbols emitted by other
6157Fortran compilers.
6158
6159* Better HPUX support
6160
6161Most debugging facilities now work on dynamic executables for HPPAs
6162running hpux9 or later. You can attach to running dynamically linked
6163processes, but by default the dynamic libraries will be read-only, so
6164for instance you won't be able to put breakpoints in them. To change
6165that behavior do the following before running the program:
6166
6167 adb -w a.out
6168 __dld_flags?W 0x5
6169 control-d
6170
6171This will cause the libraries to be mapped private and read-write.
6172To revert to the normal behavior, do this:
6173
6174 adb -w a.out
6175 __dld_flags?W 0x4
6176 control-d
6177
6178You cannot set breakpoints or examine data in the library until after
6179the library is loaded if the function/data symbols do not have
6180external linkage.
6181
6182GDB can now also read debug symbols produced by the HP C compiler on
6183HPPAs (sorry, no C++, Fortran or 68k support).
6184
6185* Target byte order now dynamically selectable
6186
6187You can choose which byte order to use with a target system, via the
6188commands "set endian big" and "set endian little", and you can see the
6189current setting by using "show endian". You can also give the command
6190"set endian auto", in which case GDB will use the byte order
6191associated with the executable. Currently, only embedded MIPS
6192configurations support dynamic selection of target byte order.
6193
6194* New DOS host serial code
6195
6196This version uses DPMI interrupts to handle buffered I/O, so you
6197no longer need to run asynctsr when debugging boards connected to
6198a PC's serial port.
6199
6200*** Changes in GDB-4.13:
6201
6202* New "complete" command
6203
6204This lists all the possible completions for the rest of the line, if it
6205were to be given as a command itself. This is intended for use by emacs.
6206
6207* Trailing space optional in prompt
6208
6209"set prompt" no longer adds a space for you after the prompt you set. This
6210allows you to set a prompt which ends in a space or one that does not.
6211
6212* Breakpoint hit counts
6213
6214"info break" now displays a count of the number of times the breakpoint
6215has been hit. This is especially useful in conjunction with "ignore"; you
6216can ignore a large number of breakpoint hits, look at the breakpoint info
6217to see how many times the breakpoint was hit, then run again, ignoring one
6218less than that number, and this will get you quickly to the last hit of
6219that breakpoint.
6220
6221* Ability to stop printing at NULL character
6222
6223"set print null-stop" will cause GDB to stop printing the characters of
6224an array when the first NULL is encountered. This is useful when large
6225arrays actually contain only short strings.
6226
6227* Shared library breakpoints
6228
6229In SunOS 4.x, SVR4, and Alpha OSF/1 configurations, you can now set
6230breakpoints in shared libraries before the executable is run.
6231
6232* Hardware watchpoints
6233
6234There is a new hardware breakpoint for the watch command for sparclite
6235targets. See gdb/sparclite/hw_breakpoint.note.
6236
55241689 6237Hardware watchpoints are also now supported under GNU/Linux.
c906108c
SS
6238
6239* Annotations
6240
6241Annotations have been added. These are for use with graphical interfaces,
6242and are still experimental. Currently only gdba.el uses these.
6243
6244* Improved Irix 5 support
6245
6246GDB now works properly with Irix 5.2.
6247
6248* Improved HPPA support
6249
6250GDB now works properly with the latest GCC and GAS.
6251
6252* New native configurations
6253
6254Sequent PTX4 i[34]86-sequent-ptx4
6255HPPA running OSF/1 hppa*-*-osf*
6256Atari TT running SVR4 m68*-*-sysv4*
6257RS/6000 LynxOS rs6000-*-lynxos*
6258
6259* New targets
6260
6261OS/9000 i[34]86-*-os9k
6262MIPS R4000 mips64*{,el}-*-{ecoff,elf}
6263Sparc64 sparc64-*-*
6264
6265* Hitachi SH7000 and E7000-PC ICE support
6266
6267There is now support for communicating with the Hitachi E7000-PC ICE.
6268This is available automatically when GDB is configured for the SH.
6269
6270* Fixes
6271
6272As usual, a variety of small fixes and improvements, both generic
6273and configuration-specific. See the ChangeLog for more detail.
6274
6275*** Changes in GDB-4.12:
6276
6277* Irix 5 is now supported
6278
6279* HPPA support
6280
6281GDB-4.12 on the HPPA has a number of changes which make it unable
6282to debug the output from the currently released versions of GCC and
6283GAS (GCC 2.5.8 and GAS-2.2 or PAGAS-1.36). Until the next major release
6284of GCC and GAS, versions of these tools designed to work with GDB-4.12
6285can be retrieved via anonymous ftp from jaguar.cs.utah.edu:/dist.
6286
6287
6288*** Changes in GDB-4.11:
6289
6290* User visible changes:
6291
6292* Remote Debugging
6293
6294The "set remotedebug" option is now consistent between the mips remote
6295target, remote targets using the gdb-specific protocol, UDI (AMD's
6296debug protocol for the 29k) and the 88k bug monitor. It is now an
6297integer specifying a debug level (normally 0 or 1, but 2 means more
6298debugging info for the mips target).
6299
6300* DEC Alpha native support
6301
6302GDB now works on the DEC Alpha. GCC 2.4.5 does not produce usable
6303debug info, but GDB works fairly well with the DEC compiler and should
6304work with a future GCC release. See the README file for a few
6305Alpha-specific notes.
6306
6307* Preliminary thread implementation
6308
6309GDB now has preliminary thread support for both SGI/Irix and LynxOS.
6310
6311* LynxOS native and target support for 386
6312
6313This release has been hosted on LynxOS 2.2, and also can be configured
6314to remotely debug programs running under LynxOS (see gdb/gdbserver/README
6315for details).
6316
6317* Improvements in C++ mangling/demangling.
6318
6319This release has much better g++ debugging, specifically in name
6320mangling/demangling, virtual function calls, print virtual table,
6321call methods, ...etc.
6322
6323*** Changes in GDB-4.10:
6324
6325 * User visible changes:
6326
6327Remote debugging using the GDB-specific (`target remote') protocol now
6328supports the `load' command. This is only useful if you have some
6329other way of getting the stub to the target system, and you can put it
6330somewhere in memory where it won't get clobbered by the download.
6331
6332Filename completion now works.
6333
6334When run under emacs mode, the "info line" command now causes the
6335arrow to point to the line specified. Also, "info line" prints
6336addresses in symbolic form (as well as hex).
6337
6338All vxworks based targets now support a user settable option, called
6339vxworks-timeout. This option represents the number of seconds gdb
6340should wait for responses to rpc's. You might want to use this if
6341your vxworks target is, perhaps, a slow software simulator or happens
6342to be on the far side of a thin network line.
6343
6344 * DEC alpha support
6345
6346This release contains support for using a DEC alpha as a GDB host for
6347cross debugging. Native alpha debugging is not supported yet.
6348
6349
6350*** Changes in GDB-4.9:
6351
6352 * Testsuite
6353
6354This is the first GDB release which is accompanied by a matching testsuite.
6355The testsuite requires installation of dejagnu, which should be available
6356via ftp from most sites that carry GNU software.
6357
6358 * C++ demangling
6359
6360'Cfront' style demangling has had its name changed to 'ARM' style, to
6361emphasize that it was written from the specifications in the C++ Annotated
6362Reference Manual, not necessarily to be compatible with AT&T cfront. Despite
6363disclaimers, it still generated too much confusion with users attempting to
6364use gdb with AT&T cfront.
6365
6366 * Simulators
6367
6368GDB now uses a standard remote interface to a simulator library.
6369So far, the library contains simulators for the Zilog Z8001/2, the
6370Hitachi H8/300, H8/500 and Super-H.
6371
6372 * New targets supported
6373
6374H8/300 simulator h8300-hitachi-hms or h8300hms
6375H8/500 simulator h8500-hitachi-hms or h8500hms
6376SH simulator sh-hitachi-hms or sh
6377Z8000 simulator z8k-zilog-none or z8ksim
6378IDT MIPS board over serial line mips-idt-ecoff
6379
6380Cross-debugging to GO32 targets is supported. It requires a custom
6381version of the i386-stub.c module which is integrated with the
6382GO32 memory extender.
6383
6384 * New remote protocols
6385
6386MIPS remote debugging protocol.
6387
6388 * New source languages supported
6389
6390This version includes preliminary support for Chill, a Pascal like language
6391used by telecommunications companies. Chill support is also being integrated
6392into the GNU compiler, but we don't know when it will be publically available.
6393
6394
6395*** Changes in GDB-4.8:
6396
6397 * HP Precision Architecture supported
6398
6399GDB now supports HP PA-RISC machines running HPUX. A preliminary
6400version of this support was available as a set of patches from the
6401University of Utah. GDB does not support debugging of programs
6402compiled with the HP compiler, because HP will not document their file
6403format. Instead, you must use GCC (version 2.3.2 or later) and PA-GAS
6404(as available from jaguar.cs.utah.edu:/dist/pa-gas.u4.tar.Z).
6405
6406Many problems in the preliminary version have been fixed.
6407
6408 * Faster and better demangling
6409
6410We have improved template demangling and fixed numerous bugs in the GNU style
6411demangler. It can now handle type modifiers such as `static' or `const'. Wide
6412character types (wchar_t) are now supported. Demangling of each symbol is now
6413only done once, and is cached when the symbol table for a file is read in.
6414This results in a small increase in memory usage for C programs, a moderate
6415increase in memory usage for C++ programs, and a fantastic speedup in
6416symbol lookups.
6417
6418`Cfront' style demangling still doesn't work with AT&T cfront. It was written
6419from the specifications in the Annotated Reference Manual, which AT&T's
6420compiler does not actually implement.
6421
6422 * G++ multiple inheritance compiler problem
6423
6424In the 2.3.2 release of gcc/g++, how the compiler resolves multiple
6425inheritance lattices was reworked to properly discover ambiguities. We
6426recently found an example which causes this new algorithm to fail in a
6427very subtle way, producing bad debug information for those classes.
6428The file 'gcc.patch' (in this directory) can be applied to gcc to
6429circumvent the problem. A future GCC release will contain a complete
6430fix.
6431
6432The previous G++ debug info problem (mentioned below for the gdb-4.7
6433release) is fixed in gcc version 2.3.2.
6434
6435 * Improved configure script
6436
6437The `configure' script will now attempt to guess your system type if
6438you don't supply a host system type. The old scheme of supplying a
6439host system triplet is preferable over using this. All the magic is
6440done in the new `config.guess' script. Examine it for details.
6441
6442We have also brought our configure script much more in line with the FSF's
6443version. It now supports the --with-xxx options. In particular,
6444`--with-minimal-bfd' can be used to make the GDB binary image smaller.
6445The resulting GDB will not be able to read arbitrary object file formats --
6446only the format ``expected'' to be used on the configured target system.
6447We hope to make this the default in a future release.
6448
6449 * Documentation improvements
6450
6451There's new internal documentation on how to modify GDB, and how to
6452produce clean changes to the code. We implore people to read it
6453before submitting changes.
6454
6455The GDB manual uses new, sexy Texinfo conditionals, rather than arcane
6456M4 macros. The new texinfo.tex is provided in this release. Pre-built
6457`info' files are also provided. To build `info' files from scratch,
6458you will need the latest `makeinfo' release, which will be available in
6459a future texinfo-X.Y release.
6460
6461*NOTE* The new texinfo.tex can cause old versions of TeX to hang.
6462We're not sure exactly which versions have this problem, but it has
6463been seen in 3.0. We highly recommend upgrading to TeX version 3.141
6464or better. If that isn't possible, there is a patch in
6465`texinfo/tex3patch' that will modify `texinfo/texinfo.tex' to work
6466around this problem.
6467
6468 * New features
6469
6470GDB now supports array constants that can be used in expressions typed in by
6471the user. The syntax is `{element, element, ...}'. Ie: you can now type
6472`print {1, 2, 3}', and it will build up an array in memory malloc'd in
6473the target program.
6474
6475The new directory `gdb/sparclite' contains a program that demonstrates
6476how the sparc-stub.c remote stub runs on a Fujitsu SPARClite processor.
6477
6478 * New native hosts supported
6479
6480HP/PA-RISC under HPUX using GNU tools hppa1.1-hp-hpux
6481386 CPUs running SCO Unix 3.2v4 i386-unknown-sco3.2v4
6482
6483 * New targets supported
6484
6485AMD 29k family via UDI a29k-amd-udi or udi29k
6486
6487 * New file formats supported
6488
6489BFD now supports reading HP/PA-RISC executables (SOM file format?),
6490HPUX core files, and SCO 3.2v2 core files.
6491
6492 * Major bug fixes
6493
6494Attaching to processes now works again; thanks for the many bug reports.
6495
6496We have also stomped on a bunch of core dumps caused by
6497printf_filtered("%s") problems.
6498
6499We eliminated a copyright problem on the rpc and ptrace header files
6500for VxWorks, which was discovered at the last minute during the 4.7
6501release. You should now be able to build a VxWorks GDB.
6502
6503You can now interrupt gdb while an attached process is running. This
6504will cause the attached process to stop, and give control back to GDB.
6505
6506We fixed problems caused by using too many file descriptors
6507for reading symbols from object files and libraries. This was
6508especially a problem for programs that used many (~100) shared
6509libraries.
6510
6511The `step' command now only enters a subroutine if there is line number
6512information for the subroutine. Otherwise it acts like the `next'
6513command. Previously, `step' would enter subroutines if there was
6514any debugging information about the routine. This avoids problems
6515when using `cc -g1' on MIPS machines.
6516
6517 * Internal improvements
6518
6519GDB's internal interfaces have been improved to make it easier to support
6520debugging of multiple languages in the future.
6521
6522GDB now uses a common structure for symbol information internally.
6523Minimal symbols (derived from linkage symbols in object files), partial
6524symbols (from a quick scan of debug information), and full symbols
6525contain a common subset of information, making it easier to write
6526shared code that handles any of them.
6527
6528 * New command line options
6529
6530We now accept --silent as an alias for --quiet.
6531
6532 * Mmalloc licensing
6533
6534The memory-mapped-malloc library is now licensed under the GNU Library
6535General Public License.
6536
6537*** Changes in GDB-4.7:
6538
6539 * Host/native/target split
6540
6541GDB has had some major internal surgery to untangle the support for
6542hosts and remote targets. Now, when you configure GDB for a remote
6543target, it will no longer load in all of the support for debugging
6544local programs on the host. When fully completed and tested, this will
6545ensure that arbitrary host/target combinations are possible.
6546
6547The primary conceptual shift is to separate the non-portable code in
6548GDB into three categories. Host specific code is required any time GDB
6549is compiled on that host, regardless of the target. Target specific
6550code relates to the peculiarities of the target, but can be compiled on
6551any host. Native specific code is everything else: it can only be
6552built when the host and target are the same system. Child process
6553handling and core file support are two common `native' examples.
6554
6555GDB's use of /proc for controlling Unix child processes is now cleaner.
6556It has been split out into a single module under the `target_ops' vector,
6557plus two native-dependent functions for each system that uses /proc.
6558
6559 * New hosts supported
6560
6561HP/Apollo 68k (under the BSD domain) m68k-apollo-bsd or apollo68bsd
6562386 CPUs running various BSD ports i386-unknown-bsd or 386bsd
6563386 CPUs running SCO Unix i386-unknown-scosysv322 or i386sco
6564
6565 * New targets supported
6566
6567Fujitsu SPARClite sparclite-fujitsu-none or sparclite
656868030 and CPU32 m68030-*-*, m68332-*-*
6569
6570 * New native hosts supported
6571
6572386 CPUs running various BSD ports i386-unknown-bsd or 386bsd
6573 (386bsd is not well tested yet)
6574386 CPUs running SCO Unix i386-unknown-scosysv322 or sco
6575
6576 * New file formats supported
6577
6578BFD now supports COFF files for the Zilog Z8000 microprocessor. It
6579supports reading of `a.out.adobe' object files, which are an a.out
6580format extended with minimal information about multiple sections.
6581
6582 * New commands
6583
6584`show copying' is the same as the old `info copying'.
6585`show warranty' is the same as `info warrantee'.
6586These were renamed for consistency. The old commands continue to work.
6587
6588`info handle' is a new alias for `info signals'.
6589
6590You can now define pre-command hooks, which attach arbitrary command
6591scripts to any command. The commands in the hook will be executed
6592prior to the user's command. You can also create a hook which will be
6593executed whenever the program stops. See gdb.texinfo.
6594
6595 * C++ improvements
6596
6597We now deal with Cfront style name mangling, and can even extract type
6598info from mangled symbols. GDB can automatically figure out which
6599symbol mangling style your C++ compiler uses.
6600
6601Calling of methods and virtual functions has been improved as well.
6602
6603 * Major bug fixes
6604
6605The crash that occured when debugging Sun Ansi-C compiled binaries is
6606fixed. This was due to mishandling of the extra N_SO stabs output
6607by the compiler.
6608
6609We also finally got Ultrix 4.2 running in house, and fixed core file
6610support, with help from a dozen people on the net.
6611
6612John M. Farrell discovered that the reason that single-stepping was so
6613slow on all of the Mips based platforms (primarily SGI and DEC) was
6614that we were trying to demangle and lookup a symbol used for internal
6615purposes on every instruction that was being stepped through. Changing
6616the name of that symbol so that it couldn't be mistaken for a C++
6617mangled symbol sped things up a great deal.
6618
6619Rich Pixley sped up symbol lookups in general by getting much smarter
6620about when C++ symbol mangling is necessary. This should make symbol
6621completion (TAB on the command line) much faster. It's not as fast as
6622we'd like, but it's significantly faster than gdb-4.6.
6623
6624 * AMD 29k support
6625
6626A new user controllable variable 'call_scratch_address' can
6627specify the location of a scratch area to be used when GDB
6628calls a function in the target. This is necessary because the
6629usual method of putting the scratch area on the stack does not work
6630in systems that have separate instruction and data spaces.
6631
6632We integrated changes to support the 29k UDI (Universal Debugger
6633Interface), but discovered at the last minute that we didn't have all
6634of the appropriate copyright paperwork. We are working with AMD to
6635resolve this, and hope to have it available soon.
6636
6637 * Remote interfaces
6638
6639We have sped up the remote serial line protocol, especially for targets
6640with lots of registers. It now supports a new `expedited status' ('T')
6641message which can be used in place of the existing 'S' status message.
6642This allows the remote stub to send only the registers that GDB
6643needs to make a quick decision about single-stepping or conditional
6644breakpoints, eliminating the need to fetch the entire register set for
6645each instruction being stepped through.
6646
6647The GDB remote serial protocol now implements a write-through cache for
6648registers, only re-reading the registers if the target has run.
6649
6650There is also a new remote serial stub for SPARC processors. You can
6651find it in gdb-4.7/gdb/sparc-stub.c. This was written to support the
6652Fujitsu SPARClite processor, but will run on any stand-alone SPARC
6653processor with a serial port.
6654
6655 * Configuration
6656
6657Configure.in files have become much easier to read and modify. A new
6658`table driven' format makes it more obvious what configurations are
6659supported, and what files each one uses.
6660
6661 * Library changes
6662
6663There is a new opcodes library which will eventually contain all of the
6664disassembly routines and opcode tables. At present, it only contains
6665Sparc and Z8000 routines. This will allow the assembler, debugger, and
6666disassembler (binutils/objdump) to share these routines.
6667
6668The libiberty library is now copylefted under the GNU Library General
6669Public License. This allows more liberal use, and was done so libg++
6670can use it. This makes no difference to GDB, since the Library License
6671grants all the rights from the General Public License.
6672
6673 * Documentation
6674
6675The file gdb-4.7/gdb/doc/stabs.texinfo is a (relatively) complete
6676reference to the stabs symbol info used by the debugger. It is (as far
6677as we know) the only published document on this fascinating topic. We
6678encourage you to read it, compare it to the stabs information on your
6679system, and send improvements on the document in general (to
6680bug-gdb@prep.ai.mit.edu).
6681
6682And, of course, many bugs have been fixed.
6683
6684
6685*** Changes in GDB-4.6:
6686
6687 * Better support for C++ function names
6688
6689GDB now accepts as input the "demangled form" of C++ overloaded function
6690names and member function names, and can do command completion on such names
6691(using TAB, TAB-TAB, and ESC-?). The names have to be quoted with a pair of
6692single quotes. Examples are 'func (int, long)' and 'obj::operator==(obj&)'.
6693Make use of command completion, it is your friend.
6694
6695GDB also now accepts a variety of C++ mangled symbol formats. They are
6696the GNU g++ style, the Cfront (ARM) style, and the Lucid (lcc) style.
6697You can tell GDB which format to use by doing a 'set demangle-style {gnu,
6698lucid, cfront, auto}'. 'gnu' is the default. Do a 'set demangle-style foo'
6699for the list of formats.
6700
6701 * G++ symbol mangling problem
6702
6703Recent versions of gcc have a bug in how they emit debugging information for
6704C++ methods (when using dbx-style stabs). The file 'gcc.patch' (in this
6705directory) can be applied to gcc to fix the problem. Alternatively, if you
6706can't fix gcc, you can #define GCC_MANGLE_BUG when compling gdb/symtab.c. The
6707usual symptom is difficulty with setting breakpoints on methods. GDB complains
6708about the method being non-existent. (We believe that version 2.2.2 of GCC has
6709this problem.)
6710
6711 * New 'maintenance' command
6712
6713All of the commands related to hacking GDB internals have been moved out of
6714the main command set, and now live behind the 'maintenance' command. This
6715can also be abbreviated as 'mt'. The following changes were made:
6716
6717 dump-me -> maintenance dump-me
6718 info all-breakpoints -> maintenance info breakpoints
6719 printmsyms -> maintenance print msyms
6720 printobjfiles -> maintenance print objfiles
6721 printpsyms -> maintenance print psymbols
6722 printsyms -> maintenance print symbols
6723
6724The following commands are new:
6725
6726 maintenance demangle Call internal GDB demangler routine to
6727 demangle a C++ link name and prints the result.
6728 maintenance print type Print a type chain for a given symbol
6729
6730 * Change to .gdbinit file processing
6731
6732We now read the $HOME/.gdbinit file before processing the argv arguments
6733(e.g. reading symbol files or core files). This allows global parameters to
6734be set, which will apply during the symbol reading. The ./.gdbinit is still
6735read after argv processing.
6736
6737 * New hosts supported
6738
6739Solaris-2.0 !!! sparc-sun-solaris2 or sun4sol2
6740
55241689 6741GNU/Linux support i386-unknown-linux or linux
c906108c
SS
6742
6743We are also including code to support the HP/PA running BSD and HPUX. This
6744is almost guaranteed not to work, as we didn't have time to test or build it
6745for this release. We are including it so that the more adventurous (or
6746masochistic) of you can play with it. We also had major problems with the
6747fact that the compiler that we got from HP doesn't support the -g option.
6748It costs extra.
6749
6750 * New targets supported
6751
6752Hitachi H8/300 h8300-hitachi-hms or h8300hms
6753
6754 * More smarts about finding #include files
6755
6756GDB now remembers the compilation directory for all include files, and for
6757all files from which C is generated (like yacc and lex sources). This
6758greatly improves GDB's ability to find yacc/lex sources, and include files,
6759especially if you are debugging your program from a directory different from
6760the one that contains your sources.
6761
6762We also fixed a bug which caused difficulty with listing and setting
6763breakpoints in include files which contain C code. (In the past, you had to
6764try twice in order to list an include file that you hadn't looked at before.)
6765
6766 * Interesting infernals change
6767
6768GDB now deals with arbitrary numbers of sections, where the symbols for each
6769section must be relocated relative to that section's landing place in the
6770target's address space. This work was needed to support ELF with embedded
6771stabs used by Solaris-2.0.
6772
6773 * Bug fixes (of course!)
6774
6775There have been loads of fixes for the following things:
6776 mips, rs6000, 29k/udi, m68k, g++, type handling, elf/dwarf, m88k,
6777 i960, stabs, DOS(GO32), procfs, etc...
6778
6779See the ChangeLog for details.
6780
6781*** Changes in GDB-4.5:
6782
6783 * New machines supported (host and target)
6784
6785IBM RS6000 running AIX rs6000-ibm-aix or rs6000
6786
6787SGI Irix-4.x mips-sgi-irix4 or iris4
6788
6789 * New malloc package
6790
6791GDB now uses a new memory manager called mmalloc, based on gmalloc.
6792Mmalloc is capable of handling mutiple heaps of memory. It is also
6793capable of saving a heap to a file, and then mapping it back in later.
6794This can be used to greatly speedup the startup of GDB by using a
6795pre-parsed symbol table which lives in a mmalloc managed heap. For
6796more details, please read mmalloc/mmalloc.texi.
6797
6798 * info proc
6799
6800The 'info proc' command (SVR4 only) has been enhanced quite a bit. See
6801'help info proc' for details.
6802
6803 * MIPS ecoff symbol table format
6804
6805The code that reads MIPS symbol table format is now supported on all hosts.
6806Thanks to MIPS for releasing the sym.h and symconst.h files to make this
6807possible.
6808
6809 * File name changes for MS-DOS
6810
6811Many files in the config directories have been renamed to make it easier to
6812support GDB on MS-DOSe systems (which have very restrictive file name
6813conventions :-( ). MS-DOSe host support (under DJ Delorie's GO32
6814environment) is close to working but has some remaining problems. Note
6815that debugging of DOS programs is not supported, due to limitations
6816in the ``operating system'', but it can be used to host cross-debugging.
6817
6818 * Cross byte order fixes
6819
6820Many fixes have been made to support cross debugging of Sparc and MIPS
6821targets from hosts whose byte order differs.
6822
6823 * New -mapped and -readnow options
6824
6825If memory-mapped files are available on your system through the 'mmap'
6826system call, you can use the -mapped option on the `file' or
6827`symbol-file' commands to cause GDB to write the symbols from your
6828program into a reusable file. If the program you are debugging is
6829called `/path/fred', the mapped symbol file will be `./fred.syms'.
6830Future GDB debugging sessions will notice the presence of this file,
6831and will quickly map in symbol information from it, rather than reading
6832the symbol table from the executable program. Using the '-mapped'
6833option in a GDB `file' or `symbol-file' command has the same effect as
6834starting GDB with the '-mapped' command-line option.
6835
6836You can cause GDB to read the entire symbol table immediately by using
6837the '-readnow' option with any of the commands that load symbol table
6838information (or on the GDB command line). This makes the command
6839slower, but makes future operations faster.
6840
6841The -mapped and -readnow options are typically combined in order to
6842build a `fred.syms' file that contains complete symbol information.
6843A simple GDB invocation to do nothing but build a `.syms' file for future
6844use is:
6845
6846 gdb -batch -nx -mapped -readnow programname
6847
6848The `.syms' file is specific to the host machine on which GDB is run.
6849It holds an exact image of GDB's internal symbol table. It cannot be
6850shared across multiple host platforms.
6851
6852 * longjmp() handling
6853
6854GDB is now capable of stepping and nexting over longjmp(), _longjmp(), and
6855siglongjmp() without losing control. This feature has not yet been ported to
6856all systems. It currently works on many 386 platforms, all MIPS-based
6857platforms (SGI, DECstation, etc), and Sun3/4.
6858
6859 * Solaris 2.0
6860
6861Preliminary work has been put in to support the new Solaris OS from Sun. At
6862this time, it can control and debug processes, but it is not capable of
6863reading symbols.
6864
6865 * Bug fixes
6866
6867As always, many many bug fixes. The major areas were with g++, and mipsread.
6868People using the MIPS-based platforms should experience fewer mysterious
6869crashes and trashed symbol tables.
6870
6871*** Changes in GDB-4.4:
6872
6873 * New machines supported (host and target)
6874
6875SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco
6876 (except core files)
6877BSD Reno on Vax vax-dec-bsd
6878Ultrix on Vax vax-dec-ultrix
6879
6880 * New machines supported (target)
6881
6882AMD 29000 embedded, using EBMON a29k-none-none
6883
6884 * C++ support
6885
6886GDB continues to improve its handling of C++. `References' work better.
6887The demangler has also been improved, and now deals with symbols mangled as
6888per the Annotated C++ Reference Guide.
6889
6890GDB also now handles `stabs' symbol information embedded in MIPS
6891`ecoff' symbol tables. Since the ecoff format was not easily
6892extensible to handle new languages such as C++, this appeared to be a
6893good way to put C++ debugging info into MIPS binaries. This option
6894will be supported in the GNU C compiler, version 2, when it is
6895released.
6896
6897 * New features for SVR4
6898
6899GDB now handles SVR4 shared libraries, in the same fashion as SunOS
6900shared libraries. Debugging dynamically linked programs should present
6901only minor differences from debugging statically linked programs.
6902
6903The `info proc' command will print out information about any process
6904on an SVR4 system (including the one you are debugging). At the moment,
6905it prints the address mappings of the process.
6906
6907If you bring up GDB on another SVR4 system, please send mail to
6908bug-gdb@prep.ai.mit.edu to let us know what changes were reqired (if any).
6909
6910 * Better dynamic linking support in SunOS
6911
6912Reading symbols from shared libraries which contain debugging symbols
6913now works properly. However, there remain issues such as automatic
6914skipping of `transfer vector' code during function calls, which
6915make it harder to debug code in a shared library, than to debug the
6916same code linked statically.
6917
6918 * New Getopt
6919
6920GDB is now using the latest `getopt' routines from the FSF. This
6921version accepts the -- prefix for options with long names. GDB will
6922continue to accept the old forms (-option and +option) as well.
6923Various single letter abbreviations for options have been explicity
6924added to the option table so that they won't get overshadowed in the
6925future by other options that begin with the same letter.
6926
6927 * Bugs fixed
6928
6929The `cleanup_undefined_types' bug that many of you noticed has been squashed.
6930Many assorted bugs have been handled. Many more remain to be handled.
6931See the various ChangeLog files (primarily in gdb and bfd) for details.
6932
6933
6934*** Changes in GDB-4.3:
6935
6936 * New machines supported (host and target)
6937
6938Amiga 3000 running Amix m68k-cbm-svr4 or amix
6939NCR 3000 386 running SVR4 i386-ncr-svr4 or ncr3000
6940Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88
6941
6942 * Almost SCO Unix support
6943
6944We had hoped to support:
6945SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco
6946(except for core file support), but we discovered very late in the release
6947that it has problems with process groups that render gdb unusable. Sorry
6948about that. I encourage people to fix it and post the fixes.
6949
6950 * Preliminary ELF and DWARF support
6951
6952GDB can read ELF object files on System V Release 4, and can handle
6953debugging records for C, in DWARF format, in ELF files. This support
6954is preliminary. If you bring up GDB on another SVR4 system, please
6955send mail to bug-gdb@prep.ai.mit.edu to let us know what changes were
6956reqired (if any).
6957
6958 * New Readline
6959
6960GDB now uses the latest `readline' library. One user-visible change
6961is that two tabs will list possible command completions, which previously
6962required typing M-? (meta-question mark, or ESC ?).
6963
6964 * Bugs fixed
6965
6966The `stepi' bug that many of you noticed has been squashed.
6967Many bugs in C++ have been handled. Many more remain to be handled.
6968See the various ChangeLog files (primarily in gdb and bfd) for details.
6969
6970 * State of the MIPS world (in case you wondered):
6971
6972GDB can understand the symbol tables emitted by the compilers
6973supplied by most vendors of MIPS-based machines, including DEC. These
6974symbol tables are in a format that essentially nobody else uses.
6975
6976Some versions of gcc come with an assembler post-processor called
6977mips-tfile. This program is required if you want to do source-level
6978debugging of gcc-compiled programs. I believe FSF does not ship
6979mips-tfile with gcc version 1, but it will eventually come with gcc
6980version 2.
6981
6982Debugging of g++ output remains a problem. g++ version 1.xx does not
6983really support it at all. (If you're lucky, you should be able to get
6984line numbers and stack traces to work, but no parameters or local
6985variables.) With some work it should be possible to improve the
6986situation somewhat.
6987
6988When gcc version 2 is released, you will have somewhat better luck.
6989However, even then you will get confusing results for inheritance and
6990methods.
6991
6992We will eventually provide full debugging of g++ output on
6993DECstations. This will probably involve some kind of stabs-in-ecoff
6994encapulation, but the details have not been worked out yet.
6995
6996
6997*** Changes in GDB-4.2:
6998
6999 * Improved configuration
7000
7001Only one copy of `configure' exists now, and it is not self-modifying.
7002Porting BFD is simpler.
7003
7004 * Stepping improved
7005
7006The `step' and `next' commands now only stop at the first instruction
7007of a source line. This prevents the multiple stops that used to occur
7008in switch statements, for-loops, etc. `Step' continues to stop if a
7009function that has debugging information is called within the line.
7010
7011 * Bug fixing
7012
7013Lots of small bugs fixed. More remain.
7014
7015 * New host supported (not target)
7016
7017Intel 386 PC clone running Mach i386-none-mach
7018
7019
7020*** Changes in GDB-4.1:
7021
7022 * Multiple source language support
7023
7024GDB now has internal scaffolding to handle several source languages.
7025It determines the type of each source file from its filename extension,
7026and will switch expression parsing and number formatting to match the
7027language of the function in the currently selected stack frame.
7028You can also specifically set the language to be used, with
7029`set language c' or `set language modula-2'.
7030
7031 * GDB and Modula-2
7032
7033GDB now has preliminary support for the GNU Modula-2 compiler,
7034currently under development at the State University of New York at
7035Buffalo. Development of both GDB and the GNU Modula-2 compiler will
7036continue through the fall of 1991 and into 1992.
7037
7038Other Modula-2 compilers are currently not supported, and attempting to
7039debug programs compiled with them will likely result in an error as the
7040symbol table is read. Feel free to work on it, though!
7041
7042There are hooks in GDB for strict type checking and range checking,
7043in the `Modula-2 philosophy', but they do not currently work.
7044
7045 * set write on/off
7046
7047GDB can now write to executable and core files (e.g. patch
7048a variable's value). You must turn this switch on, specify
7049the file ("exec foo" or "core foo"), *then* modify it, e.g.
7050by assigning a new value to a variable. Modifications take
7051effect immediately.
7052
7053 * Automatic SunOS shared library reading
7054
7055When you run your program, GDB automatically determines where its
7056shared libraries (if any) have been loaded, and reads their symbols.
7057The `share' command is no longer needed. This also works when
7058examining core files.
7059
7060 * set listsize
7061
7062You can specify the number of lines that the `list' command shows.
7063The default is 10.
7064
7065 * New machines supported (host and target)
7066
7067SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris
7068Sony NEWS (68K) running NEWSOS 3.x: m68k-sony-sysv or news
7069Ultracomputer (29K) running Sym1: a29k-nyu-sym1 or ultra3
7070
7071 * New hosts supported (not targets)
7072
7073IBM RT/PC: romp-ibm-aix or rtpc
7074
7075 * New targets supported (not hosts)
7076
7077AMD 29000 embedded with COFF a29k-none-coff
7078AMD 29000 embedded with a.out a29k-none-aout
7079Ultracomputer remote kernel debug a29k-nyu-kern
7080
7081 * New remote interfaces
7082
7083AMD 29000 Adapt
7084AMD 29000 Minimon
7085
7086
7087*** Changes in GDB-4.0:
7088
7089 * New Facilities
7090
7091Wide output is wrapped at good places to make the output more readable.
7092
7093Gdb now supports cross-debugging from a host machine of one type to a
7094target machine of another type. Communication with the target system
7095is over serial lines. The ``target'' command handles connecting to the
7096remote system; the ``load'' command will download a program into the
7097remote system. Serial stubs for the m68k and i386 are provided. Gdb
7098also supports debugging of realtime processes running under VxWorks,
7099using SunRPC Remote Procedure Calls over TCP/IP to talk to a debugger
7100stub on the target system.
7101
7102New CPUs supported include the AMD 29000 and Intel 960.
7103
7104GDB now reads object files and symbol tables via a ``binary file''
7105library, which allows a single copy of GDB to debug programs of multiple
7106object file types such as a.out and coff.
7107
7108There is now a GDB reference card in "doc/refcard.tex". (Make targets
7109refcard.dvi and refcard.ps are available to format it).
7110
7111
7112 * Control-Variable user interface simplified
7113
7114All variables that control the operation of the debugger can be set
7115by the ``set'' command, and displayed by the ``show'' command.
7116
7117For example, ``set prompt new-gdb=>'' will change your prompt to new-gdb=>.
7118``Show prompt'' produces the response:
7119Gdb's prompt is new-gdb=>.
7120
7121What follows are the NEW set commands. The command ``help set'' will
7122print a complete list of old and new set commands. ``help set FOO''
7123will give a longer description of the variable FOO. ``show'' will show
7124all of the variable descriptions and their current settings.
7125
7126confirm on/off: Enables warning questions for operations that are
7127 hard to recover from, e.g. rerunning the program while
7128 it is already running. Default is ON.
7129
7130editing on/off: Enables EMACS style command line editing
7131 of input. Previous lines can be recalled with
7132 control-P, the current line can be edited with control-B,
7133 you can search for commands with control-R, etc.
7134 Default is ON.
7135
7136history filename NAME: NAME is where the gdb command history
7137 will be stored. The default is .gdb_history,
7138 or the value of the environment variable
7139 GDBHISTFILE.
7140
7141history size N: The size, in commands, of the command history. The
7142 default is 256, or the value of the environment variable
7143 HISTSIZE.
7144
7145history save on/off: If this value is set to ON, the history file will
7146 be saved after exiting gdb. If set to OFF, the
7147 file will not be saved. The default is OFF.
7148
7149history expansion on/off: If this value is set to ON, then csh-like
7150 history expansion will be performed on
7151 command line input. The default is OFF.
7152
7153radix N: Sets the default radix for input and output. It can be set
7154 to 8, 10, or 16. Note that the argument to "radix" is interpreted
7155 in the current radix, so "set radix 10" is always a no-op.
7156
7157height N: This integer value is the number of lines on a page. Default
7158 is 24, the current `stty rows'' setting, or the ``li#''
7159 setting from the termcap entry matching the environment
7160 variable TERM.
7161
7162width N: This integer value is the number of characters on a line.
7163 Default is 80, the current `stty cols'' setting, or the ``co#''
7164 setting from the termcap entry matching the environment
7165 variable TERM.
7166
7167Note: ``set screensize'' is obsolete. Use ``set height'' and
7168``set width'' instead.
7169
7170print address on/off: Print memory addresses in various command displays,
7171 such as stack traces and structure values. Gdb looks
7172 more ``symbolic'' if you turn this off; it looks more
7173 ``machine level'' with it on. Default is ON.
7174
7175print array on/off: Prettyprint arrays. New convenient format! Default
7176 is OFF.
7177
7178print demangle on/off: Print C++ symbols in "source" form if on,
7179 "raw" form if off.
7180
7181print asm-demangle on/off: Same, for assembler level printouts
7182 like instructions.
7183
7184print vtbl on/off: Prettyprint C++ virtual function tables. Default is OFF.
7185
7186
7187 * Support for Epoch Environment.
7188
7189The epoch environment is a version of Emacs v18 with windowing. One
7190new command, ``inspect'', is identical to ``print'', except that if you
7191are running in the epoch environment, the value is printed in its own
7192window.
7193
7194
7195 * Support for Shared Libraries
7196
7197GDB can now debug programs and core files that use SunOS shared libraries.
7198Symbols from a shared library cannot be referenced
7199before the shared library has been linked with the program (this
7200happens after you type ``run'' and before the function main() is entered).
7201At any time after this linking (including when examining core files
7202from dynamically linked programs), gdb reads the symbols from each
7203shared library when you type the ``sharedlibrary'' command.
7204It can be abbreviated ``share''.
7205
7206sharedlibrary REGEXP: Load shared object library symbols for files
7207 matching a unix regular expression. No argument
7208 indicates to load symbols for all shared libraries.
7209
7210info sharedlibrary: Status of loaded shared libraries.
7211
7212
7213 * Watchpoints
7214
7215A watchpoint stops execution of a program whenever the value of an
7216expression changes. Checking for this slows down execution
7217tremendously whenever you are in the scope of the expression, but is
7218quite useful for catching tough ``bit-spreader'' or pointer misuse
7219problems. Some machines such as the 386 have hardware for doing this
7220more quickly, and future versions of gdb will use this hardware.
7221
7222watch EXP: Set a watchpoint (breakpoint) for an expression.
7223
7224info watchpoints: Information about your watchpoints.
7225
7226delete N: Deletes watchpoint number N (same as breakpoints).
7227disable N: Temporarily turns off watchpoint number N (same as breakpoints).
7228enable N: Re-enables watchpoint number N (same as breakpoints).
7229
7230
7231 * C++ multiple inheritance
7232
7233When used with a GCC version 2 compiler, GDB supports multiple inheritance
7234for C++ programs.
7235
7236 * C++ exception handling
7237
7238Gdb now supports limited C++ exception handling. Besides the existing
7239ability to breakpoint on an exception handler, gdb can breakpoint on
7240the raising of an exception (before the stack is peeled back to the
7241handler's context).
7242
7243catch FOO: If there is a FOO exception handler in the dynamic scope,
7244 set a breakpoint to catch exceptions which may be raised there.
7245 Multiple exceptions (``catch foo bar baz'') may be caught.
7246
7247info catch: Lists all exceptions which may be caught in the
7248 current stack frame.
7249
7250
7251 * Minor command changes
7252
7253The command ``call func (arg, arg, ...)'' now acts like the print
7254command, except it does not print or save a value if the function's result
7255is void. This is similar to dbx usage.
7256
7257The ``up'' and ``down'' commands now always print the frame they end up
7258at; ``up-silently'' and `down-silently'' can be used in scripts to change
7259frames without printing.
7260
7261 * New directory command
7262
7263'dir' now adds directories to the FRONT of the source search path.
7264The path starts off empty. Source files that contain debug information
7265about the directory in which they were compiled can be found even
7266with an empty path; Sun CC and GCC include this information. If GDB can't
7267find your source file in the current directory, type "dir .".
7268
7269 * Configuring GDB for compilation
7270
7271For normal use, type ``./configure host''. See README or gdb.texinfo
7272for more details.
7273
7274GDB now handles cross debugging. If you are remotely debugging between
7275two different machines, type ``./configure host -target=targ''.
7276Host is the machine where GDB will run; targ is the machine
7277where the program that you are debugging will run.
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