Commit | Line | Data |
---|---|---|
4efc6507 DE |
1 | /* Handle JIT code generation in the inferior for GDB, the GNU Debugger. |
2 | ||
42a4f53d | 3 | Copyright (C) 2009-2019 Free Software Foundation, Inc. |
4efc6507 DE |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | ||
22 | #include "jit.h" | |
f997c383 | 23 | #include "jit-reader.h" |
1825a88d | 24 | #include "block.h" |
4efc6507 | 25 | #include "breakpoint.h" |
a255712f | 26 | #include "command.h" |
1825a88d | 27 | #include "dictionary.h" |
c9fb1240 | 28 | #include "filenames.h" |
1825a88d | 29 | #include "frame-unwind.h" |
a255712f | 30 | #include "gdbcmd.h" |
4efc6507 | 31 | #include "gdbcore.h" |
03673fc7 | 32 | #include "inferior.h" |
76727919 | 33 | #include "observable.h" |
4efc6507 | 34 | #include "objfiles.h" |
3623dc3a | 35 | #include "regcache.h" |
4efc6507 DE |
36 | #include "symfile.h" |
37 | #include "symtab.h" | |
38 | #include "target.h" | |
2d41fa11 | 39 | #include "gdbsupport/gdb-dlfcn.h" |
53ce3c39 | 40 | #include <sys/stat.h> |
cbb099e8 | 41 | #include "gdb_bfd.h" |
6571a381 TT |
42 | #include "readline/tilde.h" |
43 | #include "completer.h" | |
4efc6507 | 44 | |
f2aec7f6 | 45 | static std::string jit_reader_dir; |
b8e0a31c | 46 | |
4efc6507 DE |
47 | static const struct objfile_data *jit_objfile_data; |
48 | ||
49 | static const char *const jit_break_name = "__jit_debug_register_code"; | |
50 | ||
51 | static const char *const jit_descriptor_name = "__jit_debug_descriptor"; | |
52 | ||
e2bd3b15 | 53 | static void jit_inferior_init (struct gdbarch *gdbarch); |
20aa2c60 | 54 | static void jit_inferior_exit_hook (struct inferior *inf); |
3b2a0cf2 | 55 | |
3623dc3a SD |
56 | /* An unwinder is registered for every gdbarch. This key is used to |
57 | remember if the unwinder has been registered for a particular | |
58 | gdbarch. */ | |
59 | ||
60 | static struct gdbarch_data *jit_gdbarch_data; | |
61 | ||
a255712f PP |
62 | /* Non-zero if we want to see trace of jit level stuff. */ |
63 | ||
ccce17b0 | 64 | static unsigned int jit_debug = 0; |
a255712f PP |
65 | |
66 | static void | |
67 | show_jit_debug (struct ui_file *file, int from_tty, | |
68 | struct cmd_list_element *c, const char *value) | |
69 | { | |
70 | fprintf_filtered (file, _("JIT debugging is %s.\n"), value); | |
71 | } | |
72 | ||
4efc6507 DE |
73 | struct target_buffer |
74 | { | |
75 | CORE_ADDR base; | |
a255712f | 76 | ULONGEST size; |
4efc6507 DE |
77 | }; |
78 | ||
405feb71 | 79 | /* Opening the file is a no-op. */ |
4efc6507 DE |
80 | |
81 | static void * | |
82 | mem_bfd_iovec_open (struct bfd *abfd, void *open_closure) | |
83 | { | |
84 | return open_closure; | |
85 | } | |
86 | ||
87 | /* Closing the file is just freeing the base/size pair on our side. */ | |
88 | ||
89 | static int | |
90 | mem_bfd_iovec_close (struct bfd *abfd, void *stream) | |
91 | { | |
92 | xfree (stream); | |
39ed5604 JK |
93 | |
94 | /* Zero means success. */ | |
95 | return 0; | |
4efc6507 DE |
96 | } |
97 | ||
98 | /* For reading the file, we just need to pass through to target_read_memory and | |
99 | fix up the arguments and return values. */ | |
100 | ||
101 | static file_ptr | |
102 | mem_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf, | |
3a90f266 | 103 | file_ptr nbytes, file_ptr offset) |
4efc6507 DE |
104 | { |
105 | int err; | |
106 | struct target_buffer *buffer = (struct target_buffer *) stream; | |
107 | ||
108 | /* If this read will read all of the file, limit it to just the rest. */ | |
109 | if (offset + nbytes > buffer->size) | |
110 | nbytes = buffer->size - offset; | |
111 | ||
112 | /* If there are no more bytes left, we've reached EOF. */ | |
113 | if (nbytes == 0) | |
114 | return 0; | |
115 | ||
116 | err = target_read_memory (buffer->base + offset, (gdb_byte *) buf, nbytes); | |
117 | if (err) | |
118 | return -1; | |
119 | ||
120 | return nbytes; | |
121 | } | |
122 | ||
123 | /* For statting the file, we only support the st_size attribute. */ | |
124 | ||
125 | static int | |
126 | mem_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb) | |
127 | { | |
128 | struct target_buffer *buffer = (struct target_buffer*) stream; | |
129 | ||
326a5c7e | 130 | memset (sb, 0, sizeof (struct stat)); |
4efc6507 DE |
131 | sb->st_size = buffer->size; |
132 | return 0; | |
133 | } | |
134 | ||
f0bbc364 TT |
135 | /* Open a BFD from the target's memory. */ |
136 | ||
192b62ce | 137 | static gdb_bfd_ref_ptr |
f0bbc364 TT |
138 | bfd_open_from_target_memory (CORE_ADDR addr, ULONGEST size, char *target) |
139 | { | |
8d749320 | 140 | struct target_buffer *buffer = XNEW (struct target_buffer); |
f0bbc364 TT |
141 | |
142 | buffer->base = addr; | |
143 | buffer->size = size; | |
64c31149 TT |
144 | return gdb_bfd_openr_iovec ("<in-memory>", target, |
145 | mem_bfd_iovec_open, | |
146 | buffer, | |
147 | mem_bfd_iovec_pread, | |
148 | mem_bfd_iovec_close, | |
149 | mem_bfd_iovec_stat); | |
f0bbc364 TT |
150 | } |
151 | ||
0e8621a0 TT |
152 | struct jit_reader |
153 | { | |
154 | jit_reader (struct gdb_reader_funcs *f, gdb_dlhandle_up &&h) | |
155 | : functions (f), handle (std::move (h)) | |
156 | { | |
157 | } | |
158 | ||
159 | ~jit_reader () | |
160 | { | |
161 | functions->destroy (functions); | |
162 | } | |
163 | ||
d6541620 | 164 | DISABLE_COPY_AND_ASSIGN (jit_reader); |
0e8621a0 TT |
165 | |
166 | struct gdb_reader_funcs *functions; | |
167 | gdb_dlhandle_up handle; | |
168 | }; | |
169 | ||
784c47ee SD |
170 | /* One reader that has been loaded successfully, and can potentially be used to |
171 | parse debug info. */ | |
172 | ||
0e8621a0 | 173 | static struct jit_reader *loaded_jit_reader = NULL; |
784c47ee SD |
174 | |
175 | typedef struct gdb_reader_funcs * (reader_init_fn_type) (void); | |
176 | static const char *reader_init_fn_sym = "gdb_init_reader"; | |
177 | ||
178 | /* Try to load FILE_NAME as a JIT debug info reader. */ | |
179 | ||
180 | static struct jit_reader * | |
181 | jit_reader_load (const char *file_name) | |
182 | { | |
784c47ee | 183 | reader_init_fn_type *init_fn; |
784c47ee | 184 | struct gdb_reader_funcs *funcs = NULL; |
784c47ee SD |
185 | |
186 | if (jit_debug) | |
187 | fprintf_unfiltered (gdb_stdlog, _("Opening shared object %s.\n"), | |
3a90f266 | 188 | file_name); |
0e8621a0 | 189 | gdb_dlhandle_up so = gdb_dlopen (file_name); |
784c47ee | 190 | |
15cf126c | 191 | init_fn = (reader_init_fn_type *) gdb_dlsym (so, reader_init_fn_sym); |
784c47ee SD |
192 | if (!init_fn) |
193 | error (_("Could not locate initialization function: %s."), | |
3a90f266 | 194 | reader_init_fn_sym); |
784c47ee SD |
195 | |
196 | if (gdb_dlsym (so, "plugin_is_GPL_compatible") == NULL) | |
197 | error (_("Reader not GPL compatible.")); | |
198 | ||
199 | funcs = init_fn (); | |
200 | if (funcs->reader_version != GDB_READER_INTERFACE_VERSION) | |
201 | error (_("Reader version does not match GDB version.")); | |
202 | ||
0e8621a0 | 203 | return new jit_reader (funcs, std::move (so)); |
784c47ee SD |
204 | } |
205 | ||
206 | /* Provides the jit-reader-load command. */ | |
207 | ||
208 | static void | |
0b39b52e | 209 | jit_reader_load_command (const char *args, int from_tty) |
784c47ee | 210 | { |
784c47ee SD |
211 | if (args == NULL) |
212 | error (_("No reader name provided.")); | |
7c218e6c | 213 | gdb::unique_xmalloc_ptr<char> file (tilde_expand (args)); |
784c47ee SD |
214 | |
215 | if (loaded_jit_reader != NULL) | |
216 | error (_("JIT reader already loaded. Run jit-reader-unload first.")); | |
217 | ||
7c218e6c | 218 | if (!IS_ABSOLUTE_PATH (file.get ())) |
f2aec7f6 | 219 | file.reset (xstrprintf ("%s%s%s", jit_reader_dir.c_str (), SLASH_STRING, |
7c218e6c | 220 | file.get ())); |
784c47ee | 221 | |
7c218e6c | 222 | loaded_jit_reader = jit_reader_load (file.get ()); |
20aa2c60 PA |
223 | reinit_frame_cache (); |
224 | jit_inferior_created_hook (); | |
784c47ee SD |
225 | } |
226 | ||
227 | /* Provides the jit-reader-unload command. */ | |
228 | ||
229 | static void | |
0b39b52e | 230 | jit_reader_unload_command (const char *args, int from_tty) |
784c47ee SD |
231 | { |
232 | if (!loaded_jit_reader) | |
233 | error (_("No JIT reader loaded.")); | |
234 | ||
20aa2c60 PA |
235 | reinit_frame_cache (); |
236 | jit_inferior_exit_hook (current_inferior ()); | |
784c47ee | 237 | |
0e8621a0 | 238 | delete loaded_jit_reader; |
784c47ee SD |
239 | loaded_jit_reader = NULL; |
240 | } | |
241 | ||
8eacb197 | 242 | /* Per-program space structure recording which objfile has the JIT |
03bef283 | 243 | symbols. */ |
03673fc7 | 244 | |
8eacb197 | 245 | struct jit_program_space_data |
03673fc7 | 246 | { |
03bef283 TT |
247 | /* The objfile. This is NULL if no objfile holds the JIT |
248 | symbols. */ | |
249 | ||
cb60f420 | 250 | struct objfile *objfile = nullptr; |
f25c0135 | 251 | |
8eacb197 | 252 | /* If this program space has __jit_debug_register_code, this is the |
f25c0135 TT |
253 | cached address from the minimal symbol. This is used to detect |
254 | relocations requiring the breakpoint to be re-created. */ | |
255 | ||
cb60f420 | 256 | CORE_ADDR cached_code_address = 0; |
f25c0135 TT |
257 | |
258 | /* This is the JIT event breakpoint, or NULL if it has not been | |
259 | set. */ | |
260 | ||
cb60f420 | 261 | struct breakpoint *jit_breakpoint = nullptr; |
03bef283 TT |
262 | }; |
263 | ||
cb60f420 TT |
264 | static program_space_key<jit_program_space_data> jit_program_space_key; |
265 | ||
8eacb197 | 266 | /* Per-objfile structure recording the addresses in the program space. |
f25c0135 TT |
267 | This object serves two purposes: for ordinary objfiles, it may |
268 | cache some symbols related to the JIT interface; and for | |
269 | JIT-created objfiles, it holds some information about the | |
270 | jit_code_entry. */ | |
03bef283 TT |
271 | |
272 | struct jit_objfile_data | |
273 | { | |
274 | /* Symbol for __jit_debug_register_code. */ | |
275 | struct minimal_symbol *register_code; | |
276 | ||
277 | /* Symbol for __jit_debug_descriptor. */ | |
278 | struct minimal_symbol *descriptor; | |
279 | ||
f25c0135 TT |
280 | /* Address of struct jit_code_entry in this objfile. This is only |
281 | non-zero for objfiles that represent code created by the JIT. */ | |
03bef283 | 282 | CORE_ADDR addr; |
03673fc7 PP |
283 | }; |
284 | ||
03bef283 TT |
285 | /* Fetch the jit_objfile_data associated with OBJF. If no data exists |
286 | yet, make a new structure and attach it. */ | |
287 | ||
288 | static struct jit_objfile_data * | |
289 | get_jit_objfile_data (struct objfile *objf) | |
290 | { | |
291 | struct jit_objfile_data *objf_data; | |
292 | ||
9a3c8263 | 293 | objf_data = (struct jit_objfile_data *) objfile_data (objf, jit_objfile_data); |
03bef283 TT |
294 | if (objf_data == NULL) |
295 | { | |
41bf6aca | 296 | objf_data = XCNEW (struct jit_objfile_data); |
03bef283 TT |
297 | set_objfile_data (objf, jit_objfile_data, objf_data); |
298 | } | |
299 | ||
300 | return objf_data; | |
301 | } | |
302 | ||
b4264740 SD |
303 | /* Remember OBJFILE has been created for struct jit_code_entry located |
304 | at inferior address ENTRY. */ | |
1825a88d SD |
305 | |
306 | static void | |
307 | add_objfile_entry (struct objfile *objfile, CORE_ADDR entry) | |
308 | { | |
03bef283 | 309 | struct jit_objfile_data *objf_data; |
1825a88d | 310 | |
03bef283 TT |
311 | objf_data = get_jit_objfile_data (objfile); |
312 | objf_data->addr = entry; | |
1825a88d SD |
313 | } |
314 | ||
8eacb197 TT |
315 | /* Return jit_program_space_data for current program space. Allocate |
316 | if not already present. */ | |
03673fc7 | 317 | |
8eacb197 | 318 | static struct jit_program_space_data * |
cb60f420 | 319 | get_jit_program_space_data () |
03673fc7 | 320 | { |
8eacb197 | 321 | struct jit_program_space_data *ps_data; |
03673fc7 | 322 | |
cb60f420 | 323 | ps_data = jit_program_space_key.get (current_program_space); |
8eacb197 | 324 | if (ps_data == NULL) |
cb60f420 | 325 | ps_data = jit_program_space_key.emplace (current_program_space); |
8eacb197 | 326 | return ps_data; |
03673fc7 PP |
327 | } |
328 | ||
1777feb0 | 329 | /* Helper function for reading the global JIT descriptor from remote |
03bef283 | 330 | memory. Returns 1 if all went well, 0 otherwise. */ |
4efc6507 | 331 | |
03bef283 | 332 | static int |
0756c555 | 333 | jit_read_descriptor (struct gdbarch *gdbarch, |
03673fc7 | 334 | struct jit_descriptor *descriptor, |
8eacb197 | 335 | struct jit_program_space_data *ps_data) |
4efc6507 DE |
336 | { |
337 | int err; | |
338 | struct type *ptr_type; | |
339 | int ptr_size; | |
340 | int desc_size; | |
341 | gdb_byte *desc_buf; | |
0756c555 | 342 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
03bef283 TT |
343 | struct jit_objfile_data *objf_data; |
344 | ||
8eacb197 | 345 | if (ps_data->objfile == NULL) |
03bef283 | 346 | return 0; |
8eacb197 | 347 | objf_data = get_jit_objfile_data (ps_data->objfile); |
03bef283 TT |
348 | if (objf_data->descriptor == NULL) |
349 | return 0; | |
350 | ||
351 | if (jit_debug) | |
352 | fprintf_unfiltered (gdb_stdlog, | |
353 | "jit_read_descriptor, descriptor_addr = %s\n", | |
77e371c0 TT |
354 | paddress (gdbarch, MSYMBOL_VALUE_ADDRESS (ps_data->objfile, |
355 | objf_data->descriptor))); | |
4efc6507 DE |
356 | |
357 | /* Figure out how big the descriptor is on the remote and how to read it. */ | |
0756c555 | 358 | ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
4efc6507 DE |
359 | ptr_size = TYPE_LENGTH (ptr_type); |
360 | desc_size = 8 + 2 * ptr_size; /* Two 32-bit ints and two pointers. */ | |
224c3ddb | 361 | desc_buf = (gdb_byte *) alloca (desc_size); |
4efc6507 DE |
362 | |
363 | /* Read the descriptor. */ | |
77e371c0 TT |
364 | err = target_read_memory (MSYMBOL_VALUE_ADDRESS (ps_data->objfile, |
365 | objf_data->descriptor), | |
03bef283 | 366 | desc_buf, desc_size); |
4efc6507 | 367 | if (err) |
03bef283 TT |
368 | { |
369 | printf_unfiltered (_("Unable to read JIT descriptor from " | |
370 | "remote memory\n")); | |
371 | return 0; | |
372 | } | |
4efc6507 DE |
373 | |
374 | /* Fix the endianness to match the host. */ | |
375 | descriptor->version = extract_unsigned_integer (&desc_buf[0], 4, byte_order); | |
376 | descriptor->action_flag = | |
377 | extract_unsigned_integer (&desc_buf[4], 4, byte_order); | |
378 | descriptor->relevant_entry = extract_typed_address (&desc_buf[8], ptr_type); | |
379 | descriptor->first_entry = | |
380 | extract_typed_address (&desc_buf[8 + ptr_size], ptr_type); | |
03bef283 TT |
381 | |
382 | return 1; | |
4efc6507 DE |
383 | } |
384 | ||
385 | /* Helper function for reading a JITed code entry from remote memory. */ | |
386 | ||
387 | static void | |
0756c555 DE |
388 | jit_read_code_entry (struct gdbarch *gdbarch, |
389 | CORE_ADDR code_addr, struct jit_code_entry *code_entry) | |
4efc6507 | 390 | { |
205c306f | 391 | int err, off; |
4efc6507 DE |
392 | struct type *ptr_type; |
393 | int ptr_size; | |
394 | int entry_size; | |
205c306f | 395 | int align_bytes; |
4efc6507 | 396 | gdb_byte *entry_buf; |
0756c555 | 397 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
4efc6507 DE |
398 | |
399 | /* Figure out how big the entry is on the remote and how to read it. */ | |
0756c555 | 400 | ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
4efc6507 | 401 | ptr_size = TYPE_LENGTH (ptr_type); |
227ee7fc | 402 | |
e11fb955 TT |
403 | /* Figure out where the uint64_t value will be. */ |
404 | align_bytes = type_align (builtin_type (gdbarch)->builtin_uint64); | |
227ee7fc RH |
405 | off = 3 * ptr_size; |
406 | off = (off + (align_bytes - 1)) & ~(align_bytes - 1); | |
407 | ||
408 | entry_size = off + 8; /* Three pointers and one 64-bit int. */ | |
224c3ddb | 409 | entry_buf = (gdb_byte *) alloca (entry_size); |
4efc6507 DE |
410 | |
411 | /* Read the entry. */ | |
412 | err = target_read_memory (code_addr, entry_buf, entry_size); | |
413 | if (err) | |
414 | error (_("Unable to read JIT code entry from remote memory!")); | |
415 | ||
416 | /* Fix the endianness to match the host. */ | |
0756c555 | 417 | ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
4efc6507 DE |
418 | code_entry->next_entry = extract_typed_address (&entry_buf[0], ptr_type); |
419 | code_entry->prev_entry = | |
420 | extract_typed_address (&entry_buf[ptr_size], ptr_type); | |
421 | code_entry->symfile_addr = | |
422 | extract_typed_address (&entry_buf[2 * ptr_size], ptr_type); | |
423 | code_entry->symfile_size = | |
205c306f | 424 | extract_unsigned_integer (&entry_buf[off], 8, byte_order); |
4efc6507 DE |
425 | } |
426 | ||
1825a88d SD |
427 | /* Proxy object for building a block. */ |
428 | ||
429 | struct gdb_block | |
430 | { | |
431 | /* gdb_blocks are linked into a tree structure. Next points to the | |
432 | next node at the same depth as this block and parent to the | |
433 | parent gdb_block. */ | |
434 | struct gdb_block *next, *parent; | |
435 | ||
436 | /* Points to the "real" block that is being built out of this | |
437 | instance. This block will be added to a blockvector, which will | |
438 | then be added to a symtab. */ | |
439 | struct block *real_block; | |
440 | ||
441 | /* The first and last code address corresponding to this block. */ | |
442 | CORE_ADDR begin, end; | |
443 | ||
444 | /* The name of this block (if any). If this is non-NULL, the | |
445 | FUNCTION symbol symbol is set to this value. */ | |
446 | const char *name; | |
447 | }; | |
448 | ||
449 | /* Proxy object for building a symtab. */ | |
450 | ||
451 | struct gdb_symtab | |
452 | { | |
89867184 SM |
453 | explicit gdb_symtab (const char *file_name) |
454 | : file_name (file_name != nullptr ? file_name : "") | |
455 | {} | |
456 | ||
457 | ~gdb_symtab () | |
458 | { | |
459 | gdb_block *gdb_block_iter, *gdb_block_iter_tmp; | |
460 | ||
461 | for ((gdb_block_iter = this->blocks, | |
462 | gdb_block_iter_tmp = gdb_block_iter->next); | |
463 | gdb_block_iter; | |
464 | gdb_block_iter = gdb_block_iter_tmp) | |
465 | { | |
466 | gdb_block_iter_tmp = gdb_block_iter->next; | |
467 | xfree ((void *) gdb_block_iter->name); | |
468 | xfree (gdb_block_iter); | |
469 | } | |
470 | } | |
471 | ||
1825a88d SD |
472 | /* The list of blocks in this symtab. These will eventually be |
473 | converted to real blocks. */ | |
89867184 | 474 | struct gdb_block *blocks = nullptr; |
1825a88d SD |
475 | |
476 | /* The number of blocks inserted. */ | |
89867184 | 477 | int nblocks = 0; |
1825a88d SD |
478 | |
479 | /* A mapping between line numbers to PC. */ | |
89867184 | 480 | gdb::unique_xmalloc_ptr<struct linetable> linetable; |
1825a88d SD |
481 | |
482 | /* The source file for this symtab. */ | |
89867184 SM |
483 | std::string file_name; |
484 | ||
485 | struct gdb_symtab *next = nullptr; | |
1825a88d SD |
486 | }; |
487 | ||
488 | /* Proxy object for building an object. */ | |
489 | ||
490 | struct gdb_object | |
491 | { | |
492 | struct gdb_symtab *symtabs; | |
493 | }; | |
494 | ||
495 | /* The type of the `private' data passed around by the callback | |
496 | functions. */ | |
497 | ||
498 | typedef CORE_ADDR jit_dbg_reader_data; | |
499 | ||
500 | /* The reader calls into this function to read data off the targets | |
501 | address space. */ | |
502 | ||
503 | static enum gdb_status | |
504 | jit_target_read_impl (GDB_CORE_ADDR target_mem, void *gdb_buf, int len) | |
505 | { | |
cb0a2700 SM |
506 | int result = target_read_memory ((CORE_ADDR) target_mem, |
507 | (gdb_byte *) gdb_buf, len); | |
1825a88d SD |
508 | if (result == 0) |
509 | return GDB_SUCCESS; | |
510 | else | |
511 | return GDB_FAIL; | |
512 | } | |
513 | ||
514 | /* The reader calls into this function to create a new gdb_object | |
515 | which it can then pass around to the other callbacks. Right now, | |
516 | all that is required is allocating the memory. */ | |
517 | ||
518 | static struct gdb_object * | |
519 | jit_object_open_impl (struct gdb_symbol_callbacks *cb) | |
520 | { | |
521 | /* CB is not required right now, but sometime in the future we might | |
522 | need a handle to it, and we'd like to do that without breaking | |
523 | the ABI. */ | |
41bf6aca | 524 | return XCNEW (struct gdb_object); |
1825a88d SD |
525 | } |
526 | ||
527 | /* Readers call into this function to open a new gdb_symtab, which, | |
528 | again, is passed around to other callbacks. */ | |
529 | ||
530 | static struct gdb_symtab * | |
531 | jit_symtab_open_impl (struct gdb_symbol_callbacks *cb, | |
3a90f266 SM |
532 | struct gdb_object *object, |
533 | const char *file_name) | |
1825a88d | 534 | { |
1825a88d SD |
535 | /* CB stays unused. See comment in jit_object_open_impl. */ |
536 | ||
89867184 | 537 | gdb_symtab *ret = new gdb_symtab (file_name); |
1825a88d SD |
538 | ret->next = object->symtabs; |
539 | object->symtabs = ret; | |
540 | return ret; | |
541 | } | |
542 | ||
543 | /* Returns true if the block corresponding to old should be placed | |
544 | before the block corresponding to new in the final blockvector. */ | |
545 | ||
546 | static int | |
547 | compare_block (const struct gdb_block *const old, | |
3a90f266 | 548 | const struct gdb_block *const newobj) |
1825a88d SD |
549 | { |
550 | if (old == NULL) | |
551 | return 1; | |
fe978cb0 | 552 | if (old->begin < newobj->begin) |
1825a88d | 553 | return 1; |
fe978cb0 | 554 | else if (old->begin == newobj->begin) |
1825a88d | 555 | { |
fe978cb0 | 556 | if (old->end > newobj->end) |
3a90f266 | 557 | return 1; |
1825a88d | 558 | else |
3a90f266 | 559 | return 0; |
1825a88d SD |
560 | } |
561 | else | |
562 | return 0; | |
563 | } | |
564 | ||
565 | /* Called by readers to open a new gdb_block. This function also | |
566 | inserts the new gdb_block in the correct place in the corresponding | |
567 | gdb_symtab. */ | |
568 | ||
569 | static struct gdb_block * | |
570 | jit_block_open_impl (struct gdb_symbol_callbacks *cb, | |
3a90f266 SM |
571 | struct gdb_symtab *symtab, struct gdb_block *parent, |
572 | GDB_CORE_ADDR begin, GDB_CORE_ADDR end, const char *name) | |
1825a88d | 573 | { |
41bf6aca | 574 | struct gdb_block *block = XCNEW (struct gdb_block); |
1825a88d SD |
575 | |
576 | block->next = symtab->blocks; | |
577 | block->begin = (CORE_ADDR) begin; | |
578 | block->end = (CORE_ADDR) end; | |
579 | block->name = name ? xstrdup (name) : NULL; | |
580 | block->parent = parent; | |
581 | ||
582 | /* Ensure that the blocks are inserted in the correct (reverse of | |
583 | the order expected by blockvector). */ | |
584 | if (compare_block (symtab->blocks, block)) | |
585 | { | |
586 | symtab->blocks = block; | |
587 | } | |
588 | else | |
589 | { | |
590 | struct gdb_block *i = symtab->blocks; | |
591 | ||
592 | for (;; i = i->next) | |
3a90f266 SM |
593 | { |
594 | /* Guaranteed to terminate, since compare_block (NULL, _) | |
595 | returns 1. */ | |
596 | if (compare_block (i->next, block)) | |
597 | { | |
598 | block->next = i->next; | |
599 | i->next = block; | |
600 | break; | |
601 | } | |
602 | } | |
1825a88d SD |
603 | } |
604 | symtab->nblocks++; | |
605 | ||
606 | return block; | |
607 | } | |
608 | ||
609 | /* Readers call this to add a line mapping (from PC to line number) to | |
610 | a gdb_symtab. */ | |
4efc6507 DE |
611 | |
612 | static void | |
1825a88d | 613 | jit_symtab_line_mapping_add_impl (struct gdb_symbol_callbacks *cb, |
3a90f266 SM |
614 | struct gdb_symtab *stab, int nlines, |
615 | struct gdb_line_mapping *map) | |
1825a88d SD |
616 | { |
617 | int i; | |
224c3ddb | 618 | int alloc_len; |
1825a88d SD |
619 | |
620 | if (nlines < 1) | |
621 | return; | |
622 | ||
224c3ddb SM |
623 | alloc_len = sizeof (struct linetable) |
624 | + (nlines - 1) * sizeof (struct linetable_entry); | |
89867184 | 625 | stab->linetable.reset (XNEWVAR (struct linetable, alloc_len)); |
1825a88d SD |
626 | stab->linetable->nitems = nlines; |
627 | for (i = 0; i < nlines; i++) | |
628 | { | |
629 | stab->linetable->item[i].pc = (CORE_ADDR) map[i].pc; | |
630 | stab->linetable->item[i].line = map[i].line; | |
631 | } | |
632 | } | |
633 | ||
634 | /* Called by readers to close a gdb_symtab. Does not need to do | |
635 | anything as of now. */ | |
636 | ||
637 | static void | |
638 | jit_symtab_close_impl (struct gdb_symbol_callbacks *cb, | |
3a90f266 | 639 | struct gdb_symtab *stab) |
1825a88d SD |
640 | { |
641 | /* Right now nothing needs to be done here. We may need to do some | |
642 | cleanup here in the future (again, without breaking the plugin | |
643 | ABI). */ | |
644 | } | |
645 | ||
646 | /* Transform STAB to a proper symtab, and add it it OBJFILE. */ | |
647 | ||
648 | static void | |
649 | finalize_symtab (struct gdb_symtab *stab, struct objfile *objfile) | |
650 | { | |
43f3e411 | 651 | struct compunit_symtab *cust; |
89867184 | 652 | struct gdb_block *gdb_block_iter; |
1825a88d | 653 | struct block *block_iter; |
241fd515 AM |
654 | int actual_nblocks, i; |
655 | size_t blockvector_size; | |
1825a88d | 656 | CORE_ADDR begin, end; |
346d1dfe | 657 | struct blockvector *bv; |
1825a88d SD |
658 | |
659 | actual_nblocks = FIRST_LOCAL_BLOCK + stab->nblocks; | |
660 | ||
89867184 SM |
661 | cust = allocate_compunit_symtab (objfile, stab->file_name.c_str ()); |
662 | allocate_symtab (cust, stab->file_name.c_str ()); | |
43f3e411 DE |
663 | add_compunit_symtab_to_objfile (cust); |
664 | ||
1825a88d | 665 | /* JIT compilers compile in memory. */ |
43f3e411 | 666 | COMPUNIT_DIRNAME (cust) = NULL; |
1825a88d SD |
667 | |
668 | /* Copy over the linetable entry if one was provided. */ | |
669 | if (stab->linetable) | |
670 | { | |
241fd515 AM |
671 | size_t size = ((stab->linetable->nitems - 1) |
672 | * sizeof (struct linetable_entry) | |
673 | + sizeof (struct linetable)); | |
43f3e411 | 674 | SYMTAB_LINETABLE (COMPUNIT_FILETABS (cust)) |
224c3ddb | 675 | = (struct linetable *) obstack_alloc (&objfile->objfile_obstack, size); |
89867184 SM |
676 | memcpy (SYMTAB_LINETABLE (COMPUNIT_FILETABS (cust)), |
677 | stab->linetable.get (), size); | |
1825a88d SD |
678 | } |
679 | ||
680 | blockvector_size = (sizeof (struct blockvector) | |
3a90f266 | 681 | + (actual_nblocks - 1) * sizeof (struct block *)); |
224c3ddb SM |
682 | bv = (struct blockvector *) obstack_alloc (&objfile->objfile_obstack, |
683 | blockvector_size); | |
43f3e411 | 684 | COMPUNIT_BLOCKVECTOR (cust) = bv; |
1825a88d SD |
685 | |
686 | /* (begin, end) will contain the PC range this entire blockvector | |
687 | spans. */ | |
346d1dfe | 688 | BLOCKVECTOR_MAP (bv) = NULL; |
1825a88d SD |
689 | begin = stab->blocks->begin; |
690 | end = stab->blocks->end; | |
346d1dfe | 691 | BLOCKVECTOR_NBLOCKS (bv) = actual_nblocks; |
1825a88d SD |
692 | |
693 | /* First run over all the gdb_block objects, creating a real block | |
694 | object for each. Simultaneously, keep setting the real_block | |
695 | fields. */ | |
696 | for (i = (actual_nblocks - 1), gdb_block_iter = stab->blocks; | |
697 | i >= FIRST_LOCAL_BLOCK; | |
698 | i--, gdb_block_iter = gdb_block_iter->next) | |
699 | { | |
700 | struct block *new_block = allocate_block (&objfile->objfile_obstack); | |
e623cf5d | 701 | struct symbol *block_name = allocate_symbol (objfile); |
2535757a TT |
702 | struct type *block_type = arch_type (get_objfile_arch (objfile), |
703 | TYPE_CODE_VOID, | |
77b7c781 | 704 | TARGET_CHAR_BIT, |
2535757a | 705 | "void"); |
1825a88d | 706 | |
b026f593 KS |
707 | BLOCK_MULTIDICT (new_block) |
708 | = mdict_create_linear (&objfile->objfile_obstack, NULL); | |
1825a88d SD |
709 | /* The address range. */ |
710 | BLOCK_START (new_block) = (CORE_ADDR) gdb_block_iter->begin; | |
711 | BLOCK_END (new_block) = (CORE_ADDR) gdb_block_iter->end; | |
712 | ||
713 | /* The name. */ | |
1825a88d | 714 | SYMBOL_DOMAIN (block_name) = VAR_DOMAIN; |
f1e6e072 | 715 | SYMBOL_ACLASS_INDEX (block_name) = LOC_BLOCK; |
08be3fe3 | 716 | symbol_set_symtab (block_name, COMPUNIT_FILETABS (cust)); |
2535757a | 717 | SYMBOL_TYPE (block_name) = lookup_function_type (block_type); |
1825a88d SD |
718 | SYMBOL_BLOCK_VALUE (block_name) = new_block; |
719 | ||
468c0cbb CB |
720 | block_name->name = obstack_strdup (&objfile->objfile_obstack, |
721 | gdb_block_iter->name); | |
1825a88d SD |
722 | |
723 | BLOCK_FUNCTION (new_block) = block_name; | |
724 | ||
346d1dfe | 725 | BLOCKVECTOR_BLOCK (bv, i) = new_block; |
1825a88d | 726 | if (begin > BLOCK_START (new_block)) |
3a90f266 | 727 | begin = BLOCK_START (new_block); |
1825a88d | 728 | if (end < BLOCK_END (new_block)) |
3a90f266 | 729 | end = BLOCK_END (new_block); |
1825a88d SD |
730 | |
731 | gdb_block_iter->real_block = new_block; | |
732 | } | |
733 | ||
734 | /* Now add the special blocks. */ | |
735 | block_iter = NULL; | |
736 | for (i = 0; i < FIRST_LOCAL_BLOCK; i++) | |
737 | { | |
84a146c9 TT |
738 | struct block *new_block; |
739 | ||
740 | new_block = (i == GLOBAL_BLOCK | |
741 | ? allocate_global_block (&objfile->objfile_obstack) | |
742 | : allocate_block (&objfile->objfile_obstack)); | |
b026f593 KS |
743 | BLOCK_MULTIDICT (new_block) |
744 | = mdict_create_linear (&objfile->objfile_obstack, NULL); | |
1825a88d SD |
745 | BLOCK_SUPERBLOCK (new_block) = block_iter; |
746 | block_iter = new_block; | |
747 | ||
748 | BLOCK_START (new_block) = (CORE_ADDR) begin; | |
749 | BLOCK_END (new_block) = (CORE_ADDR) end; | |
750 | ||
346d1dfe | 751 | BLOCKVECTOR_BLOCK (bv, i) = new_block; |
84a146c9 TT |
752 | |
753 | if (i == GLOBAL_BLOCK) | |
43f3e411 | 754 | set_block_compunit_symtab (new_block, cust); |
1825a88d SD |
755 | } |
756 | ||
757 | /* Fill up the superblock fields for the real blocks, using the | |
758 | real_block fields populated earlier. */ | |
759 | for (gdb_block_iter = stab->blocks; | |
760 | gdb_block_iter; | |
761 | gdb_block_iter = gdb_block_iter->next) | |
762 | { | |
763 | if (gdb_block_iter->parent != NULL) | |
db334a01 SD |
764 | { |
765 | /* If the plugin specifically mentioned a parent block, we | |
766 | use that. */ | |
767 | BLOCK_SUPERBLOCK (gdb_block_iter->real_block) = | |
768 | gdb_block_iter->parent->real_block; | |
769 | } | |
770 | else | |
771 | { | |
772 | /* And if not, we set a default parent block. */ | |
773 | BLOCK_SUPERBLOCK (gdb_block_iter->real_block) = | |
346d1dfe | 774 | BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); |
db334a01 | 775 | } |
1825a88d SD |
776 | } |
777 | ||
89867184 | 778 | delete stab; |
1825a88d SD |
779 | } |
780 | ||
781 | /* Called when closing a gdb_objfile. Converts OBJ to a proper | |
782 | objfile. */ | |
783 | ||
784 | static void | |
785 | jit_object_close_impl (struct gdb_symbol_callbacks *cb, | |
3a90f266 | 786 | struct gdb_object *obj) |
1825a88d SD |
787 | { |
788 | struct gdb_symtab *i, *j; | |
789 | struct objfile *objfile; | |
790 | jit_dbg_reader_data *priv_data; | |
791 | ||
9a3c8263 | 792 | priv_data = (jit_dbg_reader_data *) cb->priv_data; |
1825a88d | 793 | |
bda13cdc TT |
794 | objfile = objfile::make (nullptr, "<< JIT compiled code >>", |
795 | OBJF_NOT_FILENAME); | |
df6d5441 | 796 | objfile->per_bfd->gdbarch = target_gdbarch (); |
1825a88d | 797 | |
1825a88d SD |
798 | j = NULL; |
799 | for (i = obj->symtabs; i; i = j) | |
800 | { | |
801 | j = i->next; | |
802 | finalize_symtab (i, objfile); | |
803 | } | |
804 | add_objfile_entry (objfile, *priv_data); | |
805 | xfree (obj); | |
806 | } | |
807 | ||
744ab88c | 808 | /* Try to read CODE_ENTRY using the loaded jit reader (if any). |
b4264740 SD |
809 | ENTRY_ADDR is the address of the struct jit_code_entry in the |
810 | inferior address space. */ | |
1825a88d SD |
811 | |
812 | static int | |
744ab88c | 813 | jit_reader_try_read_symtab (struct jit_code_entry *code_entry, |
3a90f266 | 814 | CORE_ADDR entry_addr) |
1825a88d | 815 | { |
1825a88d | 816 | int status; |
1825a88d SD |
817 | jit_dbg_reader_data priv_data; |
818 | struct gdb_reader_funcs *funcs; | |
1825a88d SD |
819 | struct gdb_symbol_callbacks callbacks = |
820 | { | |
821 | jit_object_open_impl, | |
822 | jit_symtab_open_impl, | |
823 | jit_block_open_impl, | |
824 | jit_symtab_close_impl, | |
825 | jit_object_close_impl, | |
826 | ||
827 | jit_symtab_line_mapping_add_impl, | |
828 | jit_target_read_impl, | |
829 | ||
830 | &priv_data | |
831 | }; | |
832 | ||
744ab88c | 833 | priv_data = entry_addr; |
1825a88d SD |
834 | |
835 | if (!loaded_jit_reader) | |
836 | return 0; | |
837 | ||
7190276c | 838 | gdb::byte_vector gdb_mem (code_entry->symfile_size); |
1825a88d SD |
839 | |
840 | status = 1; | |
a70b8144 | 841 | try |
492d29ea | 842 | { |
7190276c | 843 | if (target_read_memory (code_entry->symfile_addr, gdb_mem.data (), |
492d29ea PA |
844 | code_entry->symfile_size)) |
845 | status = 0; | |
846 | } | |
230d2906 | 847 | catch (const gdb_exception &e) |
492d29ea | 848 | { |
1825a88d | 849 | status = 0; |
492d29ea | 850 | } |
1825a88d SD |
851 | |
852 | if (status) | |
853 | { | |
854 | funcs = loaded_jit_reader->functions; | |
7190276c SM |
855 | if (funcs->read (funcs, &callbacks, gdb_mem.data (), |
856 | code_entry->symfile_size) | |
3a90f266 SM |
857 | != GDB_SUCCESS) |
858 | status = 0; | |
1825a88d SD |
859 | } |
860 | ||
1825a88d SD |
861 | if (jit_debug && status == 0) |
862 | fprintf_unfiltered (gdb_stdlog, | |
3a90f266 | 863 | "Could not read symtab using the loaded JIT reader.\n"); |
1825a88d SD |
864 | return status; |
865 | } | |
866 | ||
744ab88c | 867 | /* Try to read CODE_ENTRY using BFD. ENTRY_ADDR is the address of the |
b4264740 | 868 | struct jit_code_entry in the inferior address space. */ |
1825a88d SD |
869 | |
870 | static void | |
871 | jit_bfd_try_read_symtab (struct jit_code_entry *code_entry, | |
3a90f266 SM |
872 | CORE_ADDR entry_addr, |
873 | struct gdbarch *gdbarch) | |
4efc6507 | 874 | { |
4efc6507 DE |
875 | struct bfd_section *sec; |
876 | struct objfile *objfile; | |
4efc6507 | 877 | const struct bfd_arch_info *b; |
4efc6507 | 878 | |
a255712f PP |
879 | if (jit_debug) |
880 | fprintf_unfiltered (gdb_stdlog, | |
38b49e22 | 881 | "jit_bfd_try_read_symtab, symfile_addr = %s, " |
a255712f PP |
882 | "symfile_size = %s\n", |
883 | paddress (gdbarch, code_entry->symfile_addr), | |
884 | pulongest (code_entry->symfile_size)); | |
885 | ||
192b62ce TT |
886 | gdb_bfd_ref_ptr nbfd (bfd_open_from_target_memory (code_entry->symfile_addr, |
887 | code_entry->symfile_size, | |
888 | gnutarget)); | |
4dfb2365 JK |
889 | if (nbfd == NULL) |
890 | { | |
891 | puts_unfiltered (_("Error opening JITed symbol file, ignoring it.\n")); | |
892 | return; | |
893 | } | |
4efc6507 DE |
894 | |
895 | /* Check the format. NOTE: This initializes important data that GDB uses! | |
896 | We would segfault later without this line. */ | |
192b62ce | 897 | if (!bfd_check_format (nbfd.get (), bfd_object)) |
4efc6507 DE |
898 | { |
899 | printf_unfiltered (_("\ | |
900 | JITed symbol file is not an object file, ignoring it.\n")); | |
4efc6507 DE |
901 | return; |
902 | } | |
903 | ||
904 | /* Check bfd arch. */ | |
0756c555 | 905 | b = gdbarch_bfd_arch_info (gdbarch); |
192b62ce | 906 | if (b->compatible (b, bfd_get_arch_info (nbfd.get ())) != b) |
4efc6507 | 907 | warning (_("JITed object file architecture %s is not compatible " |
3a90f266 | 908 | "with target architecture %s."), |
192b62ce TT |
909 | bfd_get_arch_info (nbfd.get ())->printable_name, |
910 | b->printable_name); | |
4efc6507 DE |
911 | |
912 | /* Read the section address information out of the symbol file. Since the | |
913 | file is generated by the JIT at runtime, it should all of the absolute | |
914 | addresses that we care about. */ | |
37e136b1 | 915 | section_addr_info sai; |
4efc6507 | 916 | for (sec = nbfd->sections; sec != NULL; sec = sec->next) |
fd361982 | 917 | if ((bfd_section_flags (sec) & (SEC_ALLOC|SEC_LOAD)) != 0) |
4efc6507 | 918 | { |
3a90f266 SM |
919 | /* We assume that these virtual addresses are absolute, and do not |
920 | treat them as offsets. */ | |
fd361982 AM |
921 | sai.emplace_back (bfd_section_vma (sec), |
922 | bfd_section_name (sec), | |
37e136b1 | 923 | sec->index); |
4efc6507 DE |
924 | } |
925 | ||
8ac244b4 | 926 | /* This call does not take ownership of SAI. */ |
192b62ce | 927 | objfile = symbol_file_add_from_bfd (nbfd.get (), |
37e136b1 TT |
928 | bfd_get_filename (nbfd.get ()), 0, |
929 | &sai, | |
40135bb1 | 930 | OBJF_SHARED | OBJF_NOT_FILENAME, NULL); |
4efc6507 | 931 | |
744ab88c | 932 | add_objfile_entry (objfile, entry_addr); |
1825a88d SD |
933 | } |
934 | ||
935 | /* This function registers code associated with a JIT code entry. It uses the | |
936 | pointer and size pair in the entry to read the symbol file from the remote | |
937 | and then calls symbol_file_add_from_local_memory to add it as though it were | |
938 | a symbol file added by the user. */ | |
939 | ||
940 | static void | |
941 | jit_register_code (struct gdbarch *gdbarch, | |
3a90f266 | 942 | CORE_ADDR entry_addr, struct jit_code_entry *code_entry) |
1825a88d | 943 | { |
974a734b | 944 | int success; |
1825a88d SD |
945 | |
946 | if (jit_debug) | |
947 | fprintf_unfiltered (gdb_stdlog, | |
3a90f266 SM |
948 | "jit_register_code, symfile_addr = %s, " |
949 | "symfile_size = %s\n", | |
950 | paddress (gdbarch, code_entry->symfile_addr), | |
951 | pulongest (code_entry->symfile_size)); | |
1825a88d | 952 | |
744ab88c | 953 | success = jit_reader_try_read_symtab (code_entry, entry_addr); |
1825a88d SD |
954 | |
955 | if (!success) | |
744ab88c | 956 | jit_bfd_try_read_symtab (code_entry, entry_addr, gdbarch); |
4efc6507 DE |
957 | } |
958 | ||
4efc6507 DE |
959 | /* Look up the objfile with this code entry address. */ |
960 | ||
961 | static struct objfile * | |
962 | jit_find_objf_with_entry_addr (CORE_ADDR entry_addr) | |
963 | { | |
2030c079 | 964 | for (objfile *objf : current_program_space->objfiles ()) |
4efc6507 | 965 | { |
03bef283 TT |
966 | struct jit_objfile_data *objf_data; |
967 | ||
9a3c8263 SM |
968 | objf_data |
969 | = (struct jit_objfile_data *) objfile_data (objf, jit_objfile_data); | |
03bef283 | 970 | if (objf_data != NULL && objf_data->addr == entry_addr) |
3a90f266 | 971 | return objf; |
4efc6507 DE |
972 | } |
973 | return NULL; | |
974 | } | |
975 | ||
f25c0135 TT |
976 | /* This is called when a breakpoint is deleted. It updates the |
977 | inferior's cache, if needed. */ | |
978 | ||
979 | static void | |
980 | jit_breakpoint_deleted (struct breakpoint *b) | |
981 | { | |
982 | struct bp_location *iter; | |
983 | ||
984 | if (b->type != bp_jit_event) | |
985 | return; | |
986 | ||
987 | for (iter = b->loc; iter != NULL; iter = iter->next) | |
8eacb197 TT |
988 | { |
989 | struct jit_program_space_data *ps_data; | |
990 | ||
cb60f420 | 991 | ps_data = jit_program_space_key.get (iter->pspace); |
8eacb197 TT |
992 | if (ps_data != NULL && ps_data->jit_breakpoint == iter->owner) |
993 | { | |
994 | ps_data->cached_code_address = 0; | |
995 | ps_data->jit_breakpoint = NULL; | |
996 | } | |
997 | } | |
f25c0135 TT |
998 | } |
999 | ||
03673fc7 | 1000 | /* (Re-)Initialize the jit breakpoint if necessary. |
9bb84c9f | 1001 | Return 0 if the jit breakpoint has been successfully initialized. */ |
03673fc7 PP |
1002 | |
1003 | static int | |
1004 | jit_breakpoint_re_set_internal (struct gdbarch *gdbarch, | |
8eacb197 | 1005 | struct jit_program_space_data *ps_data) |
03673fc7 | 1006 | { |
7cbd4a93 | 1007 | struct bound_minimal_symbol reg_symbol; |
3b7344d5 | 1008 | struct bound_minimal_symbol desc_symbol; |
03bef283 | 1009 | struct jit_objfile_data *objf_data; |
f25c0135 | 1010 | CORE_ADDR addr; |
03bef283 | 1011 | |
8eacb197 | 1012 | if (ps_data->objfile == NULL) |
f25c0135 TT |
1013 | { |
1014 | /* Lookup the registration symbol. If it is missing, then we | |
1015 | assume we are not attached to a JIT. */ | |
64cc34d8 | 1016 | reg_symbol = lookup_bound_minimal_symbol (jit_break_name); |
7cbd4a93 | 1017 | if (reg_symbol.minsym == NULL |
77e371c0 | 1018 | || BMSYMBOL_VALUE_ADDRESS (reg_symbol) == 0) |
f25c0135 | 1019 | return 1; |
03bef283 | 1020 | |
7cbd4a93 TT |
1021 | desc_symbol = lookup_minimal_symbol (jit_descriptor_name, NULL, |
1022 | reg_symbol.objfile); | |
3b7344d5 | 1023 | if (desc_symbol.minsym == NULL |
77e371c0 | 1024 | || BMSYMBOL_VALUE_ADDRESS (desc_symbol) == 0) |
f25c0135 | 1025 | return 1; |
03bef283 | 1026 | |
7cbd4a93 TT |
1027 | objf_data = get_jit_objfile_data (reg_symbol.objfile); |
1028 | objf_data->register_code = reg_symbol.minsym; | |
3b7344d5 | 1029 | objf_data->descriptor = desc_symbol.minsym; |
03bef283 | 1030 | |
7cbd4a93 | 1031 | ps_data->objfile = reg_symbol.objfile; |
f25c0135 TT |
1032 | } |
1033 | else | |
8eacb197 | 1034 | objf_data = get_jit_objfile_data (ps_data->objfile); |
03bef283 | 1035 | |
77e371c0 | 1036 | addr = MSYMBOL_VALUE_ADDRESS (ps_data->objfile, objf_data->register_code); |
03bef283 | 1037 | |
03673fc7 PP |
1038 | if (jit_debug) |
1039 | fprintf_unfiltered (gdb_stdlog, | |
1040 | "jit_breakpoint_re_set_internal, " | |
1041 | "breakpoint_addr = %s\n", | |
f25c0135 TT |
1042 | paddress (gdbarch, addr)); |
1043 | ||
8eacb197 | 1044 | if (ps_data->cached_code_address == addr) |
9bb84c9f | 1045 | return 0; |
f25c0135 TT |
1046 | |
1047 | /* Delete the old breakpoint. */ | |
8eacb197 TT |
1048 | if (ps_data->jit_breakpoint != NULL) |
1049 | delete_breakpoint (ps_data->jit_breakpoint); | |
03673fc7 PP |
1050 | |
1051 | /* Put a breakpoint in the registration symbol. */ | |
8eacb197 TT |
1052 | ps_data->cached_code_address = addr; |
1053 | ps_data->jit_breakpoint = create_jit_event_breakpoint (gdbarch, addr); | |
03673fc7 PP |
1054 | |
1055 | return 0; | |
1056 | } | |
1057 | ||
3623dc3a SD |
1058 | /* The private data passed around in the frame unwind callback |
1059 | functions. */ | |
1060 | ||
1061 | struct jit_unwind_private | |
1062 | { | |
1063 | /* Cached register values. See jit_frame_sniffer to see how this | |
1064 | works. */ | |
c8ec2f33 | 1065 | detached_regcache *regcache; |
3623dc3a SD |
1066 | |
1067 | /* The frame being unwound. */ | |
1068 | struct frame_info *this_frame; | |
1069 | }; | |
1070 | ||
1071 | /* Sets the value of a particular register in this frame. */ | |
1072 | ||
1073 | static void | |
1074 | jit_unwind_reg_set_impl (struct gdb_unwind_callbacks *cb, int dwarf_regnum, | |
3a90f266 | 1075 | struct gdb_reg_value *value) |
3623dc3a SD |
1076 | { |
1077 | struct jit_unwind_private *priv; | |
1078 | int gdb_reg; | |
1079 | ||
9a3c8263 | 1080 | priv = (struct jit_unwind_private *) cb->priv_data; |
3623dc3a SD |
1081 | |
1082 | gdb_reg = gdbarch_dwarf2_reg_to_regnum (get_frame_arch (priv->this_frame), | |
3a90f266 | 1083 | dwarf_regnum); |
3623dc3a SD |
1084 | if (gdb_reg == -1) |
1085 | { | |
1086 | if (jit_debug) | |
3a90f266 SM |
1087 | fprintf_unfiltered (gdb_stdlog, |
1088 | _("Could not recognize DWARF regnum %d"), | |
1089 | dwarf_regnum); | |
20aa2c60 | 1090 | value->free (value); |
3623dc3a SD |
1091 | return; |
1092 | } | |
1093 | ||
c8ec2f33 | 1094 | priv->regcache->raw_supply (gdb_reg, value->value); |
20aa2c60 | 1095 | value->free (value); |
3623dc3a SD |
1096 | } |
1097 | ||
1098 | static void | |
1099 | reg_value_free_impl (struct gdb_reg_value *value) | |
1100 | { | |
1101 | xfree (value); | |
1102 | } | |
1103 | ||
1104 | /* Get the value of register REGNUM in the previous frame. */ | |
1105 | ||
1106 | static struct gdb_reg_value * | |
1107 | jit_unwind_reg_get_impl (struct gdb_unwind_callbacks *cb, int regnum) | |
1108 | { | |
1109 | struct jit_unwind_private *priv; | |
1110 | struct gdb_reg_value *value; | |
1111 | int gdb_reg, size; | |
1112 | struct gdbarch *frame_arch; | |
1113 | ||
9a3c8263 | 1114 | priv = (struct jit_unwind_private *) cb->priv_data; |
3623dc3a SD |
1115 | frame_arch = get_frame_arch (priv->this_frame); |
1116 | ||
1117 | gdb_reg = gdbarch_dwarf2_reg_to_regnum (frame_arch, regnum); | |
1118 | size = register_size (frame_arch, gdb_reg); | |
224c3ddb SM |
1119 | value = ((struct gdb_reg_value *) |
1120 | xmalloc (sizeof (struct gdb_reg_value) + size - 1)); | |
ca9d61b9 JB |
1121 | value->defined = deprecated_frame_register_read (priv->this_frame, gdb_reg, |
1122 | value->value); | |
3623dc3a SD |
1123 | value->size = size; |
1124 | value->free = reg_value_free_impl; | |
1125 | return value; | |
1126 | } | |
1127 | ||
1128 | /* gdb_reg_value has a free function, which must be called on each | |
1129 | saved register value. */ | |
1130 | ||
1131 | static void | |
1132 | jit_dealloc_cache (struct frame_info *this_frame, void *cache) | |
1133 | { | |
9a3c8263 | 1134 | struct jit_unwind_private *priv_data = (struct jit_unwind_private *) cache; |
3623dc3a | 1135 | |
20aa2c60 | 1136 | gdb_assert (priv_data->regcache != NULL); |
c0e383c6 | 1137 | delete priv_data->regcache; |
3623dc3a SD |
1138 | xfree (priv_data); |
1139 | } | |
1140 | ||
1141 | /* The frame sniffer for the pseudo unwinder. | |
1142 | ||
1143 | While this is nominally a frame sniffer, in the case where the JIT | |
1144 | reader actually recognizes the frame, it does a lot more work -- it | |
1145 | unwinds the frame and saves the corresponding register values in | |
1146 | the cache. jit_frame_prev_register simply returns the saved | |
1147 | register values. */ | |
1148 | ||
1149 | static int | |
1150 | jit_frame_sniffer (const struct frame_unwind *self, | |
3a90f266 | 1151 | struct frame_info *this_frame, void **cache) |
3623dc3a | 1152 | { |
3623dc3a | 1153 | struct jit_unwind_private *priv_data; |
3623dc3a SD |
1154 | struct gdb_unwind_callbacks callbacks; |
1155 | struct gdb_reader_funcs *funcs; | |
1156 | ||
3623dc3a SD |
1157 | callbacks.reg_get = jit_unwind_reg_get_impl; |
1158 | callbacks.reg_set = jit_unwind_reg_set_impl; | |
1159 | callbacks.target_read = jit_target_read_impl; | |
1160 | ||
1161 | if (loaded_jit_reader == NULL) | |
1162 | return 0; | |
1163 | ||
1164 | funcs = loaded_jit_reader->functions; | |
1165 | ||
1166 | gdb_assert (!*cache); | |
1167 | ||
41bf6aca | 1168 | *cache = XCNEW (struct jit_unwind_private); |
9a3c8263 | 1169 | priv_data = (struct jit_unwind_private *) *cache; |
c8ec2f33 YQ |
1170 | /* Take a snapshot of current regcache. */ |
1171 | priv_data->regcache = new detached_regcache (get_frame_arch (this_frame), | |
1172 | true); | |
3623dc3a SD |
1173 | priv_data->this_frame = this_frame; |
1174 | ||
1175 | callbacks.priv_data = priv_data; | |
1176 | ||
1177 | /* Try to coax the provided unwinder to unwind the stack */ | |
1178 | if (funcs->unwind (funcs, &callbacks) == GDB_SUCCESS) | |
1179 | { | |
1180 | if (jit_debug) | |
3a90f266 SM |
1181 | fprintf_unfiltered (gdb_stdlog, _("Successfully unwound frame using " |
1182 | "JIT reader.\n")); | |
3623dc3a SD |
1183 | return 1; |
1184 | } | |
1185 | if (jit_debug) | |
1186 | fprintf_unfiltered (gdb_stdlog, _("Could not unwind frame using " | |
3a90f266 | 1187 | "JIT reader.\n")); |
3623dc3a SD |
1188 | |
1189 | jit_dealloc_cache (this_frame, *cache); | |
1190 | *cache = NULL; | |
1191 | ||
1192 | return 0; | |
1193 | } | |
1194 | ||
1195 | ||
1196 | /* The frame_id function for the pseudo unwinder. Relays the call to | |
1197 | the loaded plugin. */ | |
1198 | ||
1199 | static void | |
1200 | jit_frame_this_id (struct frame_info *this_frame, void **cache, | |
3a90f266 | 1201 | struct frame_id *this_id) |
3623dc3a | 1202 | { |
fe978cb0 | 1203 | struct jit_unwind_private priv; |
3623dc3a SD |
1204 | struct gdb_frame_id frame_id; |
1205 | struct gdb_reader_funcs *funcs; | |
1206 | struct gdb_unwind_callbacks callbacks; | |
1207 | ||
20aa2c60 | 1208 | priv.regcache = NULL; |
fe978cb0 | 1209 | priv.this_frame = this_frame; |
3623dc3a SD |
1210 | |
1211 | /* We don't expect the frame_id function to set any registers, so we | |
1212 | set reg_set to NULL. */ | |
1213 | callbacks.reg_get = jit_unwind_reg_get_impl; | |
1214 | callbacks.reg_set = NULL; | |
1215 | callbacks.target_read = jit_target_read_impl; | |
fe978cb0 | 1216 | callbacks.priv_data = &priv; |
3623dc3a SD |
1217 | |
1218 | gdb_assert (loaded_jit_reader); | |
1219 | funcs = loaded_jit_reader->functions; | |
1220 | ||
1221 | frame_id = funcs->get_frame_id (funcs, &callbacks); | |
1222 | *this_id = frame_id_build (frame_id.stack_address, frame_id.code_address); | |
1223 | } | |
1224 | ||
1225 | /* Pseudo unwinder function. Reads the previously fetched value for | |
1226 | the register from the cache. */ | |
1227 | ||
1228 | static struct value * | |
1229 | jit_frame_prev_register (struct frame_info *this_frame, void **cache, int reg) | |
1230 | { | |
9a3c8263 | 1231 | struct jit_unwind_private *priv = (struct jit_unwind_private *) *cache; |
20aa2c60 | 1232 | struct gdbarch *gdbarch; |
3623dc3a SD |
1233 | |
1234 | if (priv == NULL) | |
1235 | return frame_unwind_got_optimized (this_frame, reg); | |
1236 | ||
ac7936df | 1237 | gdbarch = priv->regcache->arch (); |
3f5a868b YQ |
1238 | gdb_byte *buf = (gdb_byte *) alloca (register_size (gdbarch, reg)); |
1239 | enum register_status status = priv->regcache->cooked_read (reg, buf); | |
20aa2c60 | 1240 | |
3f5a868b YQ |
1241 | if (status == REG_VALID) |
1242 | return frame_unwind_got_bytes (this_frame, reg, buf); | |
3623dc3a | 1243 | else |
3f5a868b | 1244 | return frame_unwind_got_optimized (this_frame, reg); |
3623dc3a SD |
1245 | } |
1246 | ||
1247 | /* Relay everything back to the unwinder registered by the JIT debug | |
1248 | info reader.*/ | |
1249 | ||
1250 | static const struct frame_unwind jit_frame_unwind = | |
1251 | { | |
1252 | NORMAL_FRAME, | |
1253 | default_frame_unwind_stop_reason, | |
1254 | jit_frame_this_id, | |
1255 | jit_frame_prev_register, | |
1256 | NULL, | |
1257 | jit_frame_sniffer, | |
1258 | jit_dealloc_cache | |
1259 | }; | |
1260 | ||
1261 | ||
1262 | /* This is the information that is stored at jit_gdbarch_data for each | |
1263 | architecture. */ | |
1264 | ||
1265 | struct jit_gdbarch_data_type | |
1266 | { | |
1267 | /* Has the (pseudo) unwinder been prepended? */ | |
1268 | int unwinder_registered; | |
1269 | }; | |
1270 | ||
1271 | /* Check GDBARCH and prepend the pseudo JIT unwinder if needed. */ | |
1272 | ||
1273 | static void | |
1274 | jit_prepend_unwinder (struct gdbarch *gdbarch) | |
1275 | { | |
1276 | struct jit_gdbarch_data_type *data; | |
1277 | ||
9a3c8263 SM |
1278 | data |
1279 | = (struct jit_gdbarch_data_type *) gdbarch_data (gdbarch, jit_gdbarch_data); | |
3623dc3a SD |
1280 | if (!data->unwinder_registered) |
1281 | { | |
1282 | frame_unwind_prepend_unwinder (gdbarch, &jit_frame_unwind); | |
1283 | data->unwinder_registered = 1; | |
1284 | } | |
1285 | } | |
1286 | ||
03673fc7 | 1287 | /* Register any already created translations. */ |
0756c555 DE |
1288 | |
1289 | static void | |
1290 | jit_inferior_init (struct gdbarch *gdbarch) | |
4efc6507 | 1291 | { |
4efc6507 DE |
1292 | struct jit_descriptor descriptor; |
1293 | struct jit_code_entry cur_entry; | |
8eacb197 | 1294 | struct jit_program_space_data *ps_data; |
4efc6507 | 1295 | CORE_ADDR cur_entry_addr; |
4efc6507 | 1296 | |
a255712f | 1297 | if (jit_debug) |
03673fc7 | 1298 | fprintf_unfiltered (gdb_stdlog, "jit_inferior_init\n"); |
a255712f | 1299 | |
3623dc3a SD |
1300 | jit_prepend_unwinder (gdbarch); |
1301 | ||
8eacb197 TT |
1302 | ps_data = get_jit_program_space_data (); |
1303 | if (jit_breakpoint_re_set_internal (gdbarch, ps_data) != 0) | |
4efc6507 DE |
1304 | return; |
1305 | ||
1777feb0 MS |
1306 | /* Read the descriptor so we can check the version number and load |
1307 | any already JITed functions. */ | |
8eacb197 | 1308 | if (!jit_read_descriptor (gdbarch, &descriptor, ps_data)) |
03bef283 | 1309 | return; |
4efc6507 DE |
1310 | |
1311 | /* Check that the version number agrees with that we support. */ | |
1312 | if (descriptor.version != 1) | |
03bef283 TT |
1313 | { |
1314 | printf_unfiltered (_("Unsupported JIT protocol version %ld " | |
1315 | "in descriptor (expected 1)\n"), | |
1316 | (long) descriptor.version); | |
1317 | return; | |
1318 | } | |
4efc6507 | 1319 | |
1777feb0 MS |
1320 | /* If we've attached to a running program, we need to check the descriptor |
1321 | to register any functions that were already generated. */ | |
4efc6507 DE |
1322 | for (cur_entry_addr = descriptor.first_entry; |
1323 | cur_entry_addr != 0; | |
1324 | cur_entry_addr = cur_entry.next_entry) | |
1325 | { | |
0756c555 | 1326 | jit_read_code_entry (gdbarch, cur_entry_addr, &cur_entry); |
4efc6507 DE |
1327 | |
1328 | /* This hook may be called many times during setup, so make sure we don't | |
3a90f266 | 1329 | add the same symbol file twice. */ |
4efc6507 | 1330 | if (jit_find_objf_with_entry_addr (cur_entry_addr) != NULL) |
3a90f266 | 1331 | continue; |
4efc6507 | 1332 | |
0756c555 | 1333 | jit_register_code (gdbarch, cur_entry_addr, &cur_entry); |
4efc6507 DE |
1334 | } |
1335 | } | |
1336 | ||
9bb84c9f YY |
1337 | /* inferior_created observer. */ |
1338 | ||
1339 | static void | |
1340 | jit_inferior_created (struct target_ops *ops, int from_tty) | |
1341 | { | |
1342 | jit_inferior_created_hook (); | |
1343 | } | |
1344 | ||
0756c555 DE |
1345 | /* Exported routine to call when an inferior has been created. */ |
1346 | ||
1347 | void | |
1348 | jit_inferior_created_hook (void) | |
1349 | { | |
f5656ead | 1350 | jit_inferior_init (target_gdbarch ()); |
0756c555 DE |
1351 | } |
1352 | ||
1353 | /* Exported routine to call to re-set the jit breakpoints, | |
1354 | e.g. when a program is rerun. */ | |
1355 | ||
1356 | void | |
1357 | jit_breakpoint_re_set (void) | |
1358 | { | |
f5656ead | 1359 | jit_breakpoint_re_set_internal (target_gdbarch (), |
8eacb197 | 1360 | get_jit_program_space_data ()); |
03673fc7 PP |
1361 | } |
1362 | ||
1777feb0 MS |
1363 | /* This function cleans up any code entries left over when the |
1364 | inferior exits. We get left over code when the inferior exits | |
1365 | without unregistering its code, for example when it crashes. */ | |
4efc6507 DE |
1366 | |
1367 | static void | |
a79b8f6e | 1368 | jit_inferior_exit_hook (struct inferior *inf) |
4efc6507 | 1369 | { |
7e955d83 | 1370 | for (objfile *objf : current_program_space->objfiles_safe ()) |
03bef283 | 1371 | { |
9a3c8263 SM |
1372 | struct jit_objfile_data *objf_data |
1373 | = (struct jit_objfile_data *) objfile_data (objf, jit_objfile_data); | |
4efc6507 | 1374 | |
03bef283 | 1375 | if (objf_data != NULL && objf_data->addr != 0) |
268e4f09 | 1376 | objf->unlink (); |
03bef283 | 1377 | } |
03673fc7 PP |
1378 | } |
1379 | ||
4efc6507 | 1380 | void |
0756c555 | 1381 | jit_event_handler (struct gdbarch *gdbarch) |
4efc6507 DE |
1382 | { |
1383 | struct jit_descriptor descriptor; | |
1384 | struct jit_code_entry code_entry; | |
1385 | CORE_ADDR entry_addr; | |
1386 | struct objfile *objf; | |
1387 | ||
1388 | /* Read the descriptor from remote memory. */ | |
8eacb197 TT |
1389 | if (!jit_read_descriptor (gdbarch, &descriptor, |
1390 | get_jit_program_space_data ())) | |
03bef283 | 1391 | return; |
4efc6507 DE |
1392 | entry_addr = descriptor.relevant_entry; |
1393 | ||
1777feb0 | 1394 | /* Do the corresponding action. */ |
4efc6507 DE |
1395 | switch (descriptor.action_flag) |
1396 | { | |
1397 | case JIT_NOACTION: | |
1398 | break; | |
1399 | case JIT_REGISTER: | |
0756c555 DE |
1400 | jit_read_code_entry (gdbarch, entry_addr, &code_entry); |
1401 | jit_register_code (gdbarch, entry_addr, &code_entry); | |
4efc6507 DE |
1402 | break; |
1403 | case JIT_UNREGISTER: | |
1404 | objf = jit_find_objf_with_entry_addr (entry_addr); | |
1405 | if (objf == NULL) | |
1777feb0 MS |
1406 | printf_unfiltered (_("Unable to find JITed code " |
1407 | "entry at address: %s\n"), | |
dfdbc9b4 | 1408 | paddress (gdbarch, entry_addr)); |
4efc6507 | 1409 | else |
3a90f266 | 1410 | objf->unlink (); |
4efc6507 DE |
1411 | |
1412 | break; | |
1413 | default: | |
1414 | error (_("Unknown action_flag value in JIT descriptor!")); | |
1415 | break; | |
1416 | } | |
1417 | } | |
1418 | ||
8eacb197 | 1419 | /* Called to free the data allocated to the jit_program_space_data slot. */ |
1825a88d SD |
1420 | |
1421 | static void | |
1422 | free_objfile_data (struct objfile *objfile, void *data) | |
1423 | { | |
9a3c8263 | 1424 | struct jit_objfile_data *objf_data = (struct jit_objfile_data *) data; |
03bef283 TT |
1425 | |
1426 | if (objf_data->register_code != NULL) | |
1427 | { | |
8eacb197 | 1428 | struct jit_program_space_data *ps_data; |
03bef283 | 1429 | |
cb60f420 | 1430 | ps_data = jit_program_space_key.get (objfile->pspace); |
8eacb197 | 1431 | if (ps_data != NULL && ps_data->objfile == objfile) |
4a556533 PA |
1432 | { |
1433 | ps_data->objfile = NULL; | |
2cd8cc0b TT |
1434 | if (ps_data->jit_breakpoint != NULL) |
1435 | delete_breakpoint (ps_data->jit_breakpoint); | |
4a556533 PA |
1436 | ps_data->cached_code_address = 0; |
1437 | } | |
03bef283 TT |
1438 | } |
1439 | ||
1825a88d SD |
1440 | xfree (data); |
1441 | } | |
1442 | ||
3623dc3a SD |
1443 | /* Initialize the jit_gdbarch_data slot with an instance of struct |
1444 | jit_gdbarch_data_type */ | |
1445 | ||
1446 | static void * | |
1447 | jit_gdbarch_data_init (struct obstack *obstack) | |
1448 | { | |
8d749320 SM |
1449 | struct jit_gdbarch_data_type *data = |
1450 | XOBNEW (obstack, struct jit_gdbarch_data_type); | |
3623dc3a | 1451 | |
3623dc3a | 1452 | data->unwinder_registered = 0; |
8d749320 | 1453 | |
3623dc3a SD |
1454 | return data; |
1455 | } | |
1456 | ||
4efc6507 DE |
1457 | void |
1458 | _initialize_jit (void) | |
1459 | { | |
b8e0a31c | 1460 | jit_reader_dir = relocate_gdb_directory (JIT_READER_DIR, |
3a90f266 | 1461 | JIT_READER_DIR_RELOCATABLE); |
ccce17b0 YQ |
1462 | add_setshow_zuinteger_cmd ("jit", class_maintenance, &jit_debug, |
1463 | _("Set JIT debugging."), | |
1464 | _("Show JIT debugging."), | |
1465 | _("When non-zero, JIT debugging is enabled."), | |
1466 | NULL, | |
1467 | show_jit_debug, | |
1468 | &setdebuglist, &showdebuglist); | |
a255712f | 1469 | |
76727919 TT |
1470 | gdb::observers::inferior_created.attach (jit_inferior_created); |
1471 | gdb::observers::inferior_exit.attach (jit_inferior_exit_hook); | |
1472 | gdb::observers::breakpoint_deleted.attach (jit_breakpoint_deleted); | |
f25c0135 | 1473 | |
1825a88d SD |
1474 | jit_objfile_data = |
1475 | register_objfile_data_with_cleanup (NULL, free_objfile_data); | |
3623dc3a | 1476 | jit_gdbarch_data = gdbarch_data_register_pre_init (jit_gdbarch_data_init); |
784c47ee SD |
1477 | if (is_dl_available ()) |
1478 | { | |
6571a381 TT |
1479 | struct cmd_list_element *c; |
1480 | ||
1481 | c = add_com ("jit-reader-load", no_class, jit_reader_load_command, _("\ | |
784c47ee SD |
1482 | Load FILE as debug info reader and unwinder for JIT compiled code.\n\ |
1483 | Usage: jit-reader-load FILE\n\ | |
1484 | Try to load file FILE as a debug info reader (and unwinder) for\n\ | |
1485 | JIT compiled code. The file is loaded from " JIT_READER_DIR ",\n\ | |
1486 | relocated relative to the GDB executable if required.")); | |
6571a381 TT |
1487 | set_cmd_completer (c, filename_completer); |
1488 | ||
1489 | c = add_com ("jit-reader-unload", no_class, | |
1490 | jit_reader_unload_command, _("\ | |
784c47ee | 1491 | Unload the currently loaded JIT debug info reader.\n\ |
6571a381 | 1492 | Usage: jit-reader-unload\n\n\ |
784c47ee | 1493 | Do \"help jit-reader-load\" for info on loading debug info readers.")); |
6571a381 | 1494 | set_cmd_completer (c, noop_completer); |
784c47ee | 1495 | } |
4efc6507 | 1496 | } |