Commit | Line | Data |
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4efc6507 DE |
1 | /* Handle JIT code generation in the inferior for GDB, the GNU Debugger. |
2 | ||
7b6bb8da | 3 | Copyright (C) 2009, 2010, 2011 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" | |
23 | #include "breakpoint.h" | |
a255712f PP |
24 | #include "command.h" |
25 | #include "gdbcmd.h" | |
4efc6507 | 26 | #include "gdbcore.h" |
03673fc7 | 27 | #include "inferior.h" |
4efc6507 DE |
28 | #include "observer.h" |
29 | #include "objfiles.h" | |
30 | #include "symfile.h" | |
31 | #include "symtab.h" | |
32 | #include "target.h" | |
33 | #include "gdb_stat.h" | |
34 | ||
35 | static const struct objfile_data *jit_objfile_data; | |
36 | ||
37 | static const char *const jit_break_name = "__jit_debug_register_code"; | |
38 | ||
39 | static const char *const jit_descriptor_name = "__jit_debug_descriptor"; | |
40 | ||
03673fc7 | 41 | static const struct inferior_data *jit_inferior_data = NULL; |
4efc6507 | 42 | |
e2bd3b15 | 43 | static void jit_inferior_init (struct gdbarch *gdbarch); |
3b2a0cf2 | 44 | |
a255712f PP |
45 | /* Non-zero if we want to see trace of jit level stuff. */ |
46 | ||
47 | static int jit_debug = 0; | |
48 | ||
49 | static void | |
50 | show_jit_debug (struct ui_file *file, int from_tty, | |
51 | struct cmd_list_element *c, const char *value) | |
52 | { | |
53 | fprintf_filtered (file, _("JIT debugging is %s.\n"), value); | |
54 | } | |
55 | ||
4efc6507 DE |
56 | struct target_buffer |
57 | { | |
58 | CORE_ADDR base; | |
a255712f | 59 | ULONGEST size; |
4efc6507 DE |
60 | }; |
61 | ||
62 | /* Openning the file is a no-op. */ | |
63 | ||
64 | static void * | |
65 | mem_bfd_iovec_open (struct bfd *abfd, void *open_closure) | |
66 | { | |
67 | return open_closure; | |
68 | } | |
69 | ||
70 | /* Closing the file is just freeing the base/size pair on our side. */ | |
71 | ||
72 | static int | |
73 | mem_bfd_iovec_close (struct bfd *abfd, void *stream) | |
74 | { | |
75 | xfree (stream); | |
76 | return 1; | |
77 | } | |
78 | ||
79 | /* For reading the file, we just need to pass through to target_read_memory and | |
80 | fix up the arguments and return values. */ | |
81 | ||
82 | static file_ptr | |
83 | mem_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf, | |
84 | file_ptr nbytes, file_ptr offset) | |
85 | { | |
86 | int err; | |
87 | struct target_buffer *buffer = (struct target_buffer *) stream; | |
88 | ||
89 | /* If this read will read all of the file, limit it to just the rest. */ | |
90 | if (offset + nbytes > buffer->size) | |
91 | nbytes = buffer->size - offset; | |
92 | ||
93 | /* If there are no more bytes left, we've reached EOF. */ | |
94 | if (nbytes == 0) | |
95 | return 0; | |
96 | ||
97 | err = target_read_memory (buffer->base + offset, (gdb_byte *) buf, nbytes); | |
98 | if (err) | |
99 | return -1; | |
100 | ||
101 | return nbytes; | |
102 | } | |
103 | ||
104 | /* For statting the file, we only support the st_size attribute. */ | |
105 | ||
106 | static int | |
107 | mem_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb) | |
108 | { | |
109 | struct target_buffer *buffer = (struct target_buffer*) stream; | |
110 | ||
111 | sb->st_size = buffer->size; | |
112 | return 0; | |
113 | } | |
114 | ||
115 | /* Open a BFD from the target's memory. */ | |
116 | ||
117 | static struct bfd * | |
a255712f | 118 | bfd_open_from_target_memory (CORE_ADDR addr, ULONGEST size, char *target) |
4efc6507 DE |
119 | { |
120 | const char *filename = xstrdup ("<in-memory>"); | |
121 | struct target_buffer *buffer = xmalloc (sizeof (struct target_buffer)); | |
122 | ||
123 | buffer->base = addr; | |
124 | buffer->size = size; | |
125 | return bfd_openr_iovec (filename, target, | |
126 | mem_bfd_iovec_open, | |
127 | buffer, | |
128 | mem_bfd_iovec_pread, | |
129 | mem_bfd_iovec_close, | |
130 | mem_bfd_iovec_stat); | |
131 | } | |
132 | ||
03673fc7 PP |
133 | /* Per-inferior structure recording the addresses in the inferior. */ |
134 | ||
135 | struct jit_inferior_data | |
136 | { | |
137 | CORE_ADDR breakpoint_addr; /* &__jit_debug_register_code() */ | |
138 | CORE_ADDR descriptor_addr; /* &__jit_debug_descriptor */ | |
139 | }; | |
140 | ||
141 | /* Return jit_inferior_data for current inferior. Allocate if not already | |
142 | present. */ | |
143 | ||
144 | static struct jit_inferior_data * | |
145 | get_jit_inferior_data (void) | |
146 | { | |
147 | struct inferior *inf; | |
148 | struct jit_inferior_data *inf_data; | |
149 | ||
150 | inf = current_inferior (); | |
151 | inf_data = inferior_data (inf, jit_inferior_data); | |
152 | if (inf_data == NULL) | |
153 | { | |
154 | inf_data = XZALLOC (struct jit_inferior_data); | |
155 | set_inferior_data (inf, jit_inferior_data, inf_data); | |
156 | } | |
157 | ||
158 | return inf_data; | |
159 | } | |
160 | ||
161 | static void | |
162 | jit_inferior_data_cleanup (struct inferior *inf, void *arg) | |
163 | { | |
164 | xfree (arg); | |
165 | } | |
166 | ||
1777feb0 MS |
167 | /* Helper function for reading the global JIT descriptor from remote |
168 | memory. */ | |
4efc6507 DE |
169 | |
170 | static void | |
0756c555 | 171 | jit_read_descriptor (struct gdbarch *gdbarch, |
03673fc7 PP |
172 | struct jit_descriptor *descriptor, |
173 | CORE_ADDR descriptor_addr) | |
4efc6507 DE |
174 | { |
175 | int err; | |
176 | struct type *ptr_type; | |
177 | int ptr_size; | |
178 | int desc_size; | |
179 | gdb_byte *desc_buf; | |
0756c555 | 180 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
4efc6507 DE |
181 | |
182 | /* Figure out how big the descriptor is on the remote and how to read it. */ | |
0756c555 | 183 | ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
4efc6507 DE |
184 | ptr_size = TYPE_LENGTH (ptr_type); |
185 | desc_size = 8 + 2 * ptr_size; /* Two 32-bit ints and two pointers. */ | |
186 | desc_buf = alloca (desc_size); | |
187 | ||
188 | /* Read the descriptor. */ | |
03673fc7 | 189 | err = target_read_memory (descriptor_addr, desc_buf, desc_size); |
4efc6507 DE |
190 | if (err) |
191 | error (_("Unable to read JIT descriptor from remote memory!")); | |
192 | ||
193 | /* Fix the endianness to match the host. */ | |
194 | descriptor->version = extract_unsigned_integer (&desc_buf[0], 4, byte_order); | |
195 | descriptor->action_flag = | |
196 | extract_unsigned_integer (&desc_buf[4], 4, byte_order); | |
197 | descriptor->relevant_entry = extract_typed_address (&desc_buf[8], ptr_type); | |
198 | descriptor->first_entry = | |
199 | extract_typed_address (&desc_buf[8 + ptr_size], ptr_type); | |
200 | } | |
201 | ||
202 | /* Helper function for reading a JITed code entry from remote memory. */ | |
203 | ||
204 | static void | |
0756c555 DE |
205 | jit_read_code_entry (struct gdbarch *gdbarch, |
206 | CORE_ADDR code_addr, struct jit_code_entry *code_entry) | |
4efc6507 | 207 | { |
205c306f | 208 | int err, off; |
4efc6507 DE |
209 | struct type *ptr_type; |
210 | int ptr_size; | |
211 | int entry_size; | |
205c306f | 212 | int align_bytes; |
4efc6507 | 213 | gdb_byte *entry_buf; |
0756c555 | 214 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
4efc6507 DE |
215 | |
216 | /* Figure out how big the entry is on the remote and how to read it. */ | |
0756c555 | 217 | ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
4efc6507 DE |
218 | ptr_size = TYPE_LENGTH (ptr_type); |
219 | entry_size = 3 * ptr_size + 8; /* Three pointers and one 64-bit int. */ | |
220 | entry_buf = alloca (entry_size); | |
221 | ||
222 | /* Read the entry. */ | |
223 | err = target_read_memory (code_addr, entry_buf, entry_size); | |
224 | if (err) | |
225 | error (_("Unable to read JIT code entry from remote memory!")); | |
226 | ||
227 | /* Fix the endianness to match the host. */ | |
0756c555 | 228 | ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
4efc6507 DE |
229 | code_entry->next_entry = extract_typed_address (&entry_buf[0], ptr_type); |
230 | code_entry->prev_entry = | |
231 | extract_typed_address (&entry_buf[ptr_size], ptr_type); | |
232 | code_entry->symfile_addr = | |
233 | extract_typed_address (&entry_buf[2 * ptr_size], ptr_type); | |
205c306f DM |
234 | |
235 | align_bytes = gdbarch_long_long_align_bit (gdbarch) / 8; | |
236 | off = 3 * ptr_size; | |
237 | off = (off + (align_bytes - 1)) & ~(align_bytes - 1); | |
238 | ||
4efc6507 | 239 | code_entry->symfile_size = |
205c306f | 240 | extract_unsigned_integer (&entry_buf[off], 8, byte_order); |
4efc6507 DE |
241 | } |
242 | ||
243 | /* This function registers code associated with a JIT code entry. It uses the | |
244 | pointer and size pair in the entry to read the symbol file from the remote | |
245 | and then calls symbol_file_add_from_local_memory to add it as though it were | |
246 | a symbol file added by the user. */ | |
247 | ||
248 | static void | |
0756c555 DE |
249 | jit_register_code (struct gdbarch *gdbarch, |
250 | CORE_ADDR entry_addr, struct jit_code_entry *code_entry) | |
4efc6507 DE |
251 | { |
252 | bfd *nbfd; | |
253 | struct section_addr_info *sai; | |
254 | struct bfd_section *sec; | |
255 | struct objfile *objfile; | |
4dfb2365 | 256 | struct cleanup *old_cleanups; |
4efc6507 DE |
257 | int i; |
258 | const struct bfd_arch_info *b; | |
259 | CORE_ADDR *entry_addr_ptr; | |
260 | ||
a255712f PP |
261 | if (jit_debug) |
262 | fprintf_unfiltered (gdb_stdlog, | |
263 | "jit_register_code, symfile_addr = %s, " | |
264 | "symfile_size = %s\n", | |
265 | paddress (gdbarch, code_entry->symfile_addr), | |
266 | pulongest (code_entry->symfile_size)); | |
267 | ||
4efc6507 DE |
268 | nbfd = bfd_open_from_target_memory (code_entry->symfile_addr, |
269 | code_entry->symfile_size, gnutarget); | |
4dfb2365 JK |
270 | if (nbfd == NULL) |
271 | { | |
272 | puts_unfiltered (_("Error opening JITed symbol file, ignoring it.\n")); | |
273 | return; | |
274 | } | |
4efc6507 DE |
275 | |
276 | /* Check the format. NOTE: This initializes important data that GDB uses! | |
277 | We would segfault later without this line. */ | |
278 | if (!bfd_check_format (nbfd, bfd_object)) | |
279 | { | |
280 | printf_unfiltered (_("\ | |
281 | JITed symbol file is not an object file, ignoring it.\n")); | |
4dfb2365 | 282 | bfd_close (nbfd); |
4efc6507 DE |
283 | return; |
284 | } | |
285 | ||
286 | /* Check bfd arch. */ | |
0756c555 | 287 | b = gdbarch_bfd_arch_info (gdbarch); |
4efc6507 DE |
288 | if (b->compatible (b, bfd_get_arch_info (nbfd)) != b) |
289 | warning (_("JITed object file architecture %s is not compatible " | |
290 | "with target architecture %s."), bfd_get_arch_info | |
291 | (nbfd)->printable_name, b->printable_name); | |
292 | ||
293 | /* Read the section address information out of the symbol file. Since the | |
294 | file is generated by the JIT at runtime, it should all of the absolute | |
295 | addresses that we care about. */ | |
296 | sai = alloc_section_addr_info (bfd_count_sections (nbfd)); | |
4dfb2365 | 297 | old_cleanups = make_cleanup_free_section_addr_info (sai); |
4efc6507 DE |
298 | i = 0; |
299 | for (sec = nbfd->sections; sec != NULL; sec = sec->next) | |
300 | if ((bfd_get_section_flags (nbfd, sec) & (SEC_ALLOC|SEC_LOAD)) != 0) | |
301 | { | |
302 | /* We assume that these virtual addresses are absolute, and do not | |
303 | treat them as offsets. */ | |
304 | sai->other[i].addr = bfd_get_section_vma (nbfd, sec); | |
04a679b8 | 305 | sai->other[i].name = xstrdup (bfd_get_section_name (nbfd, sec)); |
4efc6507 DE |
306 | sai->other[i].sectindex = sec->index; |
307 | ++i; | |
308 | } | |
309 | ||
4dfb2365 | 310 | /* This call takes ownership of NBFD. It does not take ownership of SAI. */ |
63524580 | 311 | objfile = symbol_file_add_from_bfd (nbfd, 0, sai, OBJF_SHARED, NULL); |
4efc6507 | 312 | |
4efc6507 DE |
313 | /* Remember a mapping from entry_addr to objfile. */ |
314 | entry_addr_ptr = xmalloc (sizeof (CORE_ADDR)); | |
315 | *entry_addr_ptr = entry_addr; | |
316 | set_objfile_data (objfile, jit_objfile_data, entry_addr_ptr); | |
317 | ||
4dfb2365 | 318 | do_cleanups (old_cleanups); |
4efc6507 DE |
319 | } |
320 | ||
1777feb0 MS |
321 | /* This function unregisters JITed code and frees the corresponding |
322 | objfile. */ | |
4efc6507 DE |
323 | |
324 | static void | |
325 | jit_unregister_code (struct objfile *objfile) | |
326 | { | |
327 | free_objfile (objfile); | |
328 | } | |
329 | ||
330 | /* Look up the objfile with this code entry address. */ | |
331 | ||
332 | static struct objfile * | |
333 | jit_find_objf_with_entry_addr (CORE_ADDR entry_addr) | |
334 | { | |
335 | struct objfile *objf; | |
336 | CORE_ADDR *objf_entry_addr; | |
337 | ||
338 | ALL_OBJFILES (objf) | |
339 | { | |
340 | objf_entry_addr = (CORE_ADDR *) objfile_data (objf, jit_objfile_data); | |
341 | if (objf_entry_addr != NULL && *objf_entry_addr == entry_addr) | |
342 | return objf; | |
343 | } | |
344 | return NULL; | |
345 | } | |
346 | ||
03673fc7 PP |
347 | /* (Re-)Initialize the jit breakpoint if necessary. |
348 | Return 0 on success. */ | |
349 | ||
350 | static int | |
351 | jit_breakpoint_re_set_internal (struct gdbarch *gdbarch, | |
352 | struct jit_inferior_data *inf_data) | |
353 | { | |
354 | if (inf_data->breakpoint_addr == 0) | |
355 | { | |
356 | struct minimal_symbol *reg_symbol; | |
357 | ||
358 | /* Lookup the registration symbol. If it is missing, then we assume | |
359 | we are not attached to a JIT. */ | |
360 | reg_symbol = lookup_minimal_symbol (jit_break_name, NULL, NULL); | |
361 | if (reg_symbol == NULL) | |
362 | return 1; | |
363 | inf_data->breakpoint_addr = SYMBOL_VALUE_ADDRESS (reg_symbol); | |
364 | if (inf_data->breakpoint_addr == 0) | |
365 | return 2; | |
3b2a0cf2 JB |
366 | |
367 | /* If we have not read the jit descriptor yet (e.g. because the JITer | |
368 | itself is in a shared library which just got loaded), do so now. */ | |
369 | if (inf_data->descriptor_addr == 0) | |
370 | jit_inferior_init (gdbarch); | |
03673fc7 PP |
371 | } |
372 | else | |
373 | return 0; | |
374 | ||
375 | if (jit_debug) | |
376 | fprintf_unfiltered (gdb_stdlog, | |
377 | "jit_breakpoint_re_set_internal, " | |
378 | "breakpoint_addr = %s\n", | |
379 | paddress (gdbarch, inf_data->breakpoint_addr)); | |
380 | ||
381 | /* Put a breakpoint in the registration symbol. */ | |
382 | create_jit_event_breakpoint (gdbarch, inf_data->breakpoint_addr); | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
387 | /* Register any already created translations. */ | |
0756c555 DE |
388 | |
389 | static void | |
390 | jit_inferior_init (struct gdbarch *gdbarch) | |
4efc6507 | 391 | { |
4efc6507 DE |
392 | struct jit_descriptor descriptor; |
393 | struct jit_code_entry cur_entry; | |
03673fc7 | 394 | struct jit_inferior_data *inf_data; |
4efc6507 | 395 | CORE_ADDR cur_entry_addr; |
4efc6507 | 396 | |
a255712f | 397 | if (jit_debug) |
03673fc7 | 398 | fprintf_unfiltered (gdb_stdlog, "jit_inferior_init\n"); |
a255712f | 399 | |
03673fc7 PP |
400 | inf_data = get_jit_inferior_data (); |
401 | if (jit_breakpoint_re_set_internal (gdbarch, inf_data) != 0) | |
4efc6507 DE |
402 | return; |
403 | ||
03673fc7 PP |
404 | if (inf_data->descriptor_addr == 0) |
405 | { | |
406 | struct minimal_symbol *desc_symbol; | |
4efc6507 | 407 | |
03673fc7 PP |
408 | /* Lookup the descriptor symbol and cache the addr. If it is |
409 | missing, we assume we are not attached to a JIT and return early. */ | |
410 | desc_symbol = lookup_minimal_symbol (jit_descriptor_name, NULL, NULL); | |
411 | if (desc_symbol == NULL) | |
412 | return; | |
a255712f | 413 | |
03673fc7 PP |
414 | inf_data->descriptor_addr = SYMBOL_VALUE_ADDRESS (desc_symbol); |
415 | if (inf_data->descriptor_addr == 0) | |
416 | return; | |
417 | } | |
4efc6507 | 418 | |
a255712f PP |
419 | if (jit_debug) |
420 | fprintf_unfiltered (gdb_stdlog, | |
03673fc7 PP |
421 | "jit_inferior_init, descriptor_addr = %s\n", |
422 | paddress (gdbarch, inf_data->descriptor_addr)); | |
a255712f | 423 | |
1777feb0 MS |
424 | /* Read the descriptor so we can check the version number and load |
425 | any already JITed functions. */ | |
03673fc7 | 426 | jit_read_descriptor (gdbarch, &descriptor, inf_data->descriptor_addr); |
4efc6507 DE |
427 | |
428 | /* Check that the version number agrees with that we support. */ | |
429 | if (descriptor.version != 1) | |
430 | error (_("Unsupported JIT protocol version in descriptor!")); | |
431 | ||
1777feb0 MS |
432 | /* If we've attached to a running program, we need to check the descriptor |
433 | to register any functions that were already generated. */ | |
4efc6507 DE |
434 | for (cur_entry_addr = descriptor.first_entry; |
435 | cur_entry_addr != 0; | |
436 | cur_entry_addr = cur_entry.next_entry) | |
437 | { | |
0756c555 | 438 | jit_read_code_entry (gdbarch, cur_entry_addr, &cur_entry); |
4efc6507 DE |
439 | |
440 | /* This hook may be called many times during setup, so make sure we don't | |
441 | add the same symbol file twice. */ | |
442 | if (jit_find_objf_with_entry_addr (cur_entry_addr) != NULL) | |
443 | continue; | |
444 | ||
0756c555 | 445 | jit_register_code (gdbarch, cur_entry_addr, &cur_entry); |
4efc6507 DE |
446 | } |
447 | } | |
448 | ||
0756c555 DE |
449 | /* Exported routine to call when an inferior has been created. */ |
450 | ||
451 | void | |
452 | jit_inferior_created_hook (void) | |
453 | { | |
454 | jit_inferior_init (target_gdbarch); | |
455 | } | |
456 | ||
457 | /* Exported routine to call to re-set the jit breakpoints, | |
458 | e.g. when a program is rerun. */ | |
459 | ||
460 | void | |
461 | jit_breakpoint_re_set (void) | |
462 | { | |
03673fc7 PP |
463 | jit_breakpoint_re_set_internal (target_gdbarch, |
464 | get_jit_inferior_data ()); | |
465 | } | |
466 | ||
467 | /* Reset inferior_data, so sybols will be looked up again, and jit_breakpoint | |
468 | will be reset. */ | |
469 | ||
470 | static void | |
471 | jit_reset_inferior_data_and_breakpoints (void) | |
472 | { | |
473 | struct jit_inferior_data *inf_data; | |
474 | ||
475 | /* Force jit_inferior_init to re-lookup of jit symbol addresses. */ | |
476 | inf_data = get_jit_inferior_data (); | |
477 | inf_data->breakpoint_addr = 0; | |
478 | inf_data->descriptor_addr = 0; | |
479 | ||
480 | /* Remove any existing JIT breakpoint(s). */ | |
481 | remove_jit_event_breakpoints (); | |
482 | ||
0756c555 DE |
483 | jit_inferior_init (target_gdbarch); |
484 | } | |
485 | ||
4efc6507 DE |
486 | /* Wrapper to match the observer function pointer prototype. */ |
487 | ||
488 | static void | |
0756c555 | 489 | jit_inferior_created_observer (struct target_ops *objfile, int from_tty) |
4efc6507 | 490 | { |
03673fc7 | 491 | jit_reset_inferior_data_and_breakpoints (); |
4efc6507 DE |
492 | } |
493 | ||
1777feb0 MS |
494 | /* This function cleans up any code entries left over when the |
495 | inferior exits. We get left over code when the inferior exits | |
496 | without unregistering its code, for example when it crashes. */ | |
4efc6507 DE |
497 | |
498 | static void | |
a79b8f6e | 499 | jit_inferior_exit_hook (struct inferior *inf) |
4efc6507 DE |
500 | { |
501 | struct objfile *objf; | |
502 | struct objfile *temp; | |
503 | ||
4efc6507 DE |
504 | ALL_OBJFILES_SAFE (objf, temp) |
505 | if (objfile_data (objf, jit_objfile_data) != NULL) | |
506 | jit_unregister_code (objf); | |
507 | } | |
508 | ||
03673fc7 PP |
509 | static void |
510 | jit_executable_changed_observer (void) | |
511 | { | |
512 | jit_reset_inferior_data_and_breakpoints (); | |
513 | } | |
514 | ||
4efc6507 | 515 | void |
0756c555 | 516 | jit_event_handler (struct gdbarch *gdbarch) |
4efc6507 DE |
517 | { |
518 | struct jit_descriptor descriptor; | |
519 | struct jit_code_entry code_entry; | |
520 | CORE_ADDR entry_addr; | |
521 | struct objfile *objf; | |
522 | ||
523 | /* Read the descriptor from remote memory. */ | |
03673fc7 PP |
524 | jit_read_descriptor (gdbarch, &descriptor, |
525 | get_jit_inferior_data ()->descriptor_addr); | |
4efc6507 DE |
526 | entry_addr = descriptor.relevant_entry; |
527 | ||
1777feb0 | 528 | /* Do the corresponding action. */ |
4efc6507 DE |
529 | switch (descriptor.action_flag) |
530 | { | |
531 | case JIT_NOACTION: | |
532 | break; | |
533 | case JIT_REGISTER: | |
0756c555 DE |
534 | jit_read_code_entry (gdbarch, entry_addr, &code_entry); |
535 | jit_register_code (gdbarch, entry_addr, &code_entry); | |
4efc6507 DE |
536 | break; |
537 | case JIT_UNREGISTER: | |
538 | objf = jit_find_objf_with_entry_addr (entry_addr); | |
539 | if (objf == NULL) | |
1777feb0 MS |
540 | printf_unfiltered (_("Unable to find JITed code " |
541 | "entry at address: %s\n"), | |
dfdbc9b4 | 542 | paddress (gdbarch, entry_addr)); |
4efc6507 DE |
543 | else |
544 | jit_unregister_code (objf); | |
545 | ||
546 | break; | |
547 | default: | |
548 | error (_("Unknown action_flag value in JIT descriptor!")); | |
549 | break; | |
550 | } | |
551 | } | |
552 | ||
553 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
554 | ||
555 | extern void _initialize_jit (void); | |
556 | ||
557 | void | |
558 | _initialize_jit (void) | |
559 | { | |
1777feb0 MS |
560 | add_setshow_zinteger_cmd ("jit", class_maintenance, &jit_debug, |
561 | _("Set JIT debugging."), | |
562 | _("Show JIT debugging."), | |
563 | _("When non-zero, JIT debugging is enabled."), | |
a255712f PP |
564 | NULL, |
565 | show_jit_debug, | |
566 | &setdebuglist, &showdebuglist); | |
567 | ||
0756c555 | 568 | observer_attach_inferior_created (jit_inferior_created_observer); |
4efc6507 | 569 | observer_attach_inferior_exit (jit_inferior_exit_hook); |
03673fc7 | 570 | observer_attach_executable_changed (jit_executable_changed_observer); |
4efc6507 | 571 | jit_objfile_data = register_objfile_data (); |
03673fc7 PP |
572 | jit_inferior_data = |
573 | register_inferior_data_with_cleanup (jit_inferior_data_cleanup); | |
4efc6507 | 574 | } |