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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" | |
f997c383 | 23 | #include "jit-reader.h" |
4efc6507 | 24 | #include "breakpoint.h" |
a255712f PP |
25 | #include "command.h" |
26 | #include "gdbcmd.h" | |
4efc6507 | 27 | #include "gdbcore.h" |
03673fc7 | 28 | #include "inferior.h" |
4efc6507 DE |
29 | #include "observer.h" |
30 | #include "objfiles.h" | |
31 | #include "symfile.h" | |
32 | #include "symtab.h" | |
33 | #include "target.h" | |
34 | #include "gdb_stat.h" | |
35 | ||
36 | static const struct objfile_data *jit_objfile_data; | |
37 | ||
38 | static const char *const jit_break_name = "__jit_debug_register_code"; | |
39 | ||
40 | static const char *const jit_descriptor_name = "__jit_debug_descriptor"; | |
41 | ||
03673fc7 | 42 | static const struct inferior_data *jit_inferior_data = NULL; |
4efc6507 | 43 | |
e2bd3b15 | 44 | static void jit_inferior_init (struct gdbarch *gdbarch); |
3b2a0cf2 | 45 | |
a255712f PP |
46 | /* Non-zero if we want to see trace of jit level stuff. */ |
47 | ||
48 | static int jit_debug = 0; | |
49 | ||
50 | static void | |
51 | show_jit_debug (struct ui_file *file, int from_tty, | |
52 | struct cmd_list_element *c, const char *value) | |
53 | { | |
54 | fprintf_filtered (file, _("JIT debugging is %s.\n"), value); | |
55 | } | |
56 | ||
4efc6507 DE |
57 | struct target_buffer |
58 | { | |
59 | CORE_ADDR base; | |
a255712f | 60 | ULONGEST size; |
4efc6507 DE |
61 | }; |
62 | ||
63 | /* Openning the file is a no-op. */ | |
64 | ||
65 | static void * | |
66 | mem_bfd_iovec_open (struct bfd *abfd, void *open_closure) | |
67 | { | |
68 | return open_closure; | |
69 | } | |
70 | ||
71 | /* Closing the file is just freeing the base/size pair on our side. */ | |
72 | ||
73 | static int | |
74 | mem_bfd_iovec_close (struct bfd *abfd, void *stream) | |
75 | { | |
76 | xfree (stream); | |
77 | return 1; | |
78 | } | |
79 | ||
80 | /* For reading the file, we just need to pass through to target_read_memory and | |
81 | fix up the arguments and return values. */ | |
82 | ||
83 | static file_ptr | |
84 | mem_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf, | |
85 | file_ptr nbytes, file_ptr offset) | |
86 | { | |
87 | int err; | |
88 | struct target_buffer *buffer = (struct target_buffer *) stream; | |
89 | ||
90 | /* If this read will read all of the file, limit it to just the rest. */ | |
91 | if (offset + nbytes > buffer->size) | |
92 | nbytes = buffer->size - offset; | |
93 | ||
94 | /* If there are no more bytes left, we've reached EOF. */ | |
95 | if (nbytes == 0) | |
96 | return 0; | |
97 | ||
98 | err = target_read_memory (buffer->base + offset, (gdb_byte *) buf, nbytes); | |
99 | if (err) | |
100 | return -1; | |
101 | ||
102 | return nbytes; | |
103 | } | |
104 | ||
105 | /* For statting the file, we only support the st_size attribute. */ | |
106 | ||
107 | static int | |
108 | mem_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb) | |
109 | { | |
110 | struct target_buffer *buffer = (struct target_buffer*) stream; | |
111 | ||
112 | sb->st_size = buffer->size; | |
113 | return 0; | |
114 | } | |
115 | ||
116 | /* Open a BFD from the target's memory. */ | |
117 | ||
118 | static struct bfd * | |
a255712f | 119 | bfd_open_from_target_memory (CORE_ADDR addr, ULONGEST size, char *target) |
4efc6507 DE |
120 | { |
121 | const char *filename = xstrdup ("<in-memory>"); | |
122 | struct target_buffer *buffer = xmalloc (sizeof (struct target_buffer)); | |
123 | ||
124 | buffer->base = addr; | |
125 | buffer->size = size; | |
126 | return bfd_openr_iovec (filename, target, | |
127 | mem_bfd_iovec_open, | |
128 | buffer, | |
129 | mem_bfd_iovec_pread, | |
130 | mem_bfd_iovec_close, | |
131 | mem_bfd_iovec_stat); | |
132 | } | |
133 | ||
03673fc7 PP |
134 | /* Per-inferior structure recording the addresses in the inferior. */ |
135 | ||
136 | struct jit_inferior_data | |
137 | { | |
138 | CORE_ADDR breakpoint_addr; /* &__jit_debug_register_code() */ | |
139 | CORE_ADDR descriptor_addr; /* &__jit_debug_descriptor */ | |
140 | }; | |
141 | ||
142 | /* Return jit_inferior_data for current inferior. Allocate if not already | |
143 | present. */ | |
144 | ||
145 | static struct jit_inferior_data * | |
146 | get_jit_inferior_data (void) | |
147 | { | |
148 | struct inferior *inf; | |
149 | struct jit_inferior_data *inf_data; | |
150 | ||
151 | inf = current_inferior (); | |
152 | inf_data = inferior_data (inf, jit_inferior_data); | |
153 | if (inf_data == NULL) | |
154 | { | |
155 | inf_data = XZALLOC (struct jit_inferior_data); | |
156 | set_inferior_data (inf, jit_inferior_data, inf_data); | |
157 | } | |
158 | ||
159 | return inf_data; | |
160 | } | |
161 | ||
162 | static void | |
163 | jit_inferior_data_cleanup (struct inferior *inf, void *arg) | |
164 | { | |
165 | xfree (arg); | |
166 | } | |
167 | ||
1777feb0 MS |
168 | /* Helper function for reading the global JIT descriptor from remote |
169 | memory. */ | |
4efc6507 DE |
170 | |
171 | static void | |
0756c555 | 172 | jit_read_descriptor (struct gdbarch *gdbarch, |
03673fc7 PP |
173 | struct jit_descriptor *descriptor, |
174 | CORE_ADDR descriptor_addr) | |
4efc6507 DE |
175 | { |
176 | int err; | |
177 | struct type *ptr_type; | |
178 | int ptr_size; | |
179 | int desc_size; | |
180 | gdb_byte *desc_buf; | |
0756c555 | 181 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
4efc6507 DE |
182 | |
183 | /* Figure out how big the descriptor is on the remote and how to read it. */ | |
0756c555 | 184 | ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
4efc6507 DE |
185 | ptr_size = TYPE_LENGTH (ptr_type); |
186 | desc_size = 8 + 2 * ptr_size; /* Two 32-bit ints and two pointers. */ | |
187 | desc_buf = alloca (desc_size); | |
188 | ||
189 | /* Read the descriptor. */ | |
03673fc7 | 190 | err = target_read_memory (descriptor_addr, desc_buf, desc_size); |
4efc6507 DE |
191 | if (err) |
192 | error (_("Unable to read JIT descriptor from remote memory!")); | |
193 | ||
194 | /* Fix the endianness to match the host. */ | |
195 | descriptor->version = extract_unsigned_integer (&desc_buf[0], 4, byte_order); | |
196 | descriptor->action_flag = | |
197 | extract_unsigned_integer (&desc_buf[4], 4, byte_order); | |
198 | descriptor->relevant_entry = extract_typed_address (&desc_buf[8], ptr_type); | |
199 | descriptor->first_entry = | |
200 | extract_typed_address (&desc_buf[8 + ptr_size], ptr_type); | |
201 | } | |
202 | ||
203 | /* Helper function for reading a JITed code entry from remote memory. */ | |
204 | ||
205 | static void | |
0756c555 DE |
206 | jit_read_code_entry (struct gdbarch *gdbarch, |
207 | CORE_ADDR code_addr, struct jit_code_entry *code_entry) | |
4efc6507 | 208 | { |
205c306f | 209 | int err, off; |
4efc6507 DE |
210 | struct type *ptr_type; |
211 | int ptr_size; | |
212 | int entry_size; | |
205c306f | 213 | int align_bytes; |
4efc6507 | 214 | gdb_byte *entry_buf; |
0756c555 | 215 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
4efc6507 DE |
216 | |
217 | /* Figure out how big the entry is on the remote and how to read it. */ | |
0756c555 | 218 | ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
4efc6507 DE |
219 | ptr_size = TYPE_LENGTH (ptr_type); |
220 | entry_size = 3 * ptr_size + 8; /* Three pointers and one 64-bit int. */ | |
221 | entry_buf = alloca (entry_size); | |
222 | ||
223 | /* Read the entry. */ | |
224 | err = target_read_memory (code_addr, entry_buf, entry_size); | |
225 | if (err) | |
226 | error (_("Unable to read JIT code entry from remote memory!")); | |
227 | ||
228 | /* Fix the endianness to match the host. */ | |
0756c555 | 229 | ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
4efc6507 DE |
230 | code_entry->next_entry = extract_typed_address (&entry_buf[0], ptr_type); |
231 | code_entry->prev_entry = | |
232 | extract_typed_address (&entry_buf[ptr_size], ptr_type); | |
233 | code_entry->symfile_addr = | |
234 | extract_typed_address (&entry_buf[2 * ptr_size], ptr_type); | |
205c306f DM |
235 | |
236 | align_bytes = gdbarch_long_long_align_bit (gdbarch) / 8; | |
237 | off = 3 * ptr_size; | |
238 | off = (off + (align_bytes - 1)) & ~(align_bytes - 1); | |
239 | ||
4efc6507 | 240 | code_entry->symfile_size = |
205c306f | 241 | extract_unsigned_integer (&entry_buf[off], 8, byte_order); |
4efc6507 DE |
242 | } |
243 | ||
244 | /* This function registers code associated with a JIT code entry. It uses the | |
245 | pointer and size pair in the entry to read the symbol file from the remote | |
246 | and then calls symbol_file_add_from_local_memory to add it as though it were | |
247 | a symbol file added by the user. */ | |
248 | ||
249 | static void | |
0756c555 DE |
250 | jit_register_code (struct gdbarch *gdbarch, |
251 | CORE_ADDR entry_addr, struct jit_code_entry *code_entry) | |
4efc6507 DE |
252 | { |
253 | bfd *nbfd; | |
254 | struct section_addr_info *sai; | |
255 | struct bfd_section *sec; | |
256 | struct objfile *objfile; | |
4dfb2365 | 257 | struct cleanup *old_cleanups; |
4efc6507 DE |
258 | int i; |
259 | const struct bfd_arch_info *b; | |
260 | CORE_ADDR *entry_addr_ptr; | |
261 | ||
a255712f PP |
262 | if (jit_debug) |
263 | fprintf_unfiltered (gdb_stdlog, | |
264 | "jit_register_code, symfile_addr = %s, " | |
265 | "symfile_size = %s\n", | |
266 | paddress (gdbarch, code_entry->symfile_addr), | |
267 | pulongest (code_entry->symfile_size)); | |
268 | ||
4efc6507 DE |
269 | nbfd = bfd_open_from_target_memory (code_entry->symfile_addr, |
270 | code_entry->symfile_size, gnutarget); | |
4dfb2365 JK |
271 | if (nbfd == NULL) |
272 | { | |
273 | puts_unfiltered (_("Error opening JITed symbol file, ignoring it.\n")); | |
274 | return; | |
275 | } | |
4efc6507 DE |
276 | |
277 | /* Check the format. NOTE: This initializes important data that GDB uses! | |
278 | We would segfault later without this line. */ | |
279 | if (!bfd_check_format (nbfd, bfd_object)) | |
280 | { | |
281 | printf_unfiltered (_("\ | |
282 | JITed symbol file is not an object file, ignoring it.\n")); | |
4dfb2365 | 283 | bfd_close (nbfd); |
4efc6507 DE |
284 | return; |
285 | } | |
286 | ||
287 | /* Check bfd arch. */ | |
0756c555 | 288 | b = gdbarch_bfd_arch_info (gdbarch); |
4efc6507 DE |
289 | if (b->compatible (b, bfd_get_arch_info (nbfd)) != b) |
290 | warning (_("JITed object file architecture %s is not compatible " | |
291 | "with target architecture %s."), bfd_get_arch_info | |
292 | (nbfd)->printable_name, b->printable_name); | |
293 | ||
294 | /* Read the section address information out of the symbol file. Since the | |
295 | file is generated by the JIT at runtime, it should all of the absolute | |
296 | addresses that we care about. */ | |
297 | sai = alloc_section_addr_info (bfd_count_sections (nbfd)); | |
4dfb2365 | 298 | old_cleanups = make_cleanup_free_section_addr_info (sai); |
4efc6507 DE |
299 | i = 0; |
300 | for (sec = nbfd->sections; sec != NULL; sec = sec->next) | |
301 | if ((bfd_get_section_flags (nbfd, sec) & (SEC_ALLOC|SEC_LOAD)) != 0) | |
302 | { | |
303 | /* We assume that these virtual addresses are absolute, and do not | |
304 | treat them as offsets. */ | |
305 | sai->other[i].addr = bfd_get_section_vma (nbfd, sec); | |
04a679b8 | 306 | sai->other[i].name = xstrdup (bfd_get_section_name (nbfd, sec)); |
4efc6507 DE |
307 | sai->other[i].sectindex = sec->index; |
308 | ++i; | |
309 | } | |
310 | ||
4dfb2365 | 311 | /* This call takes ownership of NBFD. It does not take ownership of SAI. */ |
63524580 | 312 | objfile = symbol_file_add_from_bfd (nbfd, 0, sai, OBJF_SHARED, NULL); |
4efc6507 | 313 | |
4efc6507 DE |
314 | /* Remember a mapping from entry_addr to objfile. */ |
315 | entry_addr_ptr = xmalloc (sizeof (CORE_ADDR)); | |
316 | *entry_addr_ptr = entry_addr; | |
317 | set_objfile_data (objfile, jit_objfile_data, entry_addr_ptr); | |
318 | ||
4dfb2365 | 319 | do_cleanups (old_cleanups); |
4efc6507 DE |
320 | } |
321 | ||
1777feb0 MS |
322 | /* This function unregisters JITed code and frees the corresponding |
323 | objfile. */ | |
4efc6507 DE |
324 | |
325 | static void | |
326 | jit_unregister_code (struct objfile *objfile) | |
327 | { | |
328 | free_objfile (objfile); | |
329 | } | |
330 | ||
331 | /* Look up the objfile with this code entry address. */ | |
332 | ||
333 | static struct objfile * | |
334 | jit_find_objf_with_entry_addr (CORE_ADDR entry_addr) | |
335 | { | |
336 | struct objfile *objf; | |
337 | CORE_ADDR *objf_entry_addr; | |
338 | ||
339 | ALL_OBJFILES (objf) | |
340 | { | |
341 | objf_entry_addr = (CORE_ADDR *) objfile_data (objf, jit_objfile_data); | |
342 | if (objf_entry_addr != NULL && *objf_entry_addr == entry_addr) | |
343 | return objf; | |
344 | } | |
345 | return NULL; | |
346 | } | |
347 | ||
03673fc7 PP |
348 | /* (Re-)Initialize the jit breakpoint if necessary. |
349 | Return 0 on success. */ | |
350 | ||
351 | static int | |
352 | jit_breakpoint_re_set_internal (struct gdbarch *gdbarch, | |
353 | struct jit_inferior_data *inf_data) | |
354 | { | |
355 | if (inf_data->breakpoint_addr == 0) | |
356 | { | |
357 | struct minimal_symbol *reg_symbol; | |
358 | ||
359 | /* Lookup the registration symbol. If it is missing, then we assume | |
360 | we are not attached to a JIT. */ | |
361 | reg_symbol = lookup_minimal_symbol (jit_break_name, NULL, NULL); | |
362 | if (reg_symbol == NULL) | |
363 | return 1; | |
364 | inf_data->breakpoint_addr = SYMBOL_VALUE_ADDRESS (reg_symbol); | |
365 | if (inf_data->breakpoint_addr == 0) | |
366 | return 2; | |
3b2a0cf2 JB |
367 | |
368 | /* If we have not read the jit descriptor yet (e.g. because the JITer | |
369 | itself is in a shared library which just got loaded), do so now. */ | |
370 | if (inf_data->descriptor_addr == 0) | |
371 | jit_inferior_init (gdbarch); | |
03673fc7 PP |
372 | } |
373 | else | |
374 | return 0; | |
375 | ||
376 | if (jit_debug) | |
377 | fprintf_unfiltered (gdb_stdlog, | |
378 | "jit_breakpoint_re_set_internal, " | |
379 | "breakpoint_addr = %s\n", | |
380 | paddress (gdbarch, inf_data->breakpoint_addr)); | |
381 | ||
382 | /* Put a breakpoint in the registration symbol. */ | |
383 | create_jit_event_breakpoint (gdbarch, inf_data->breakpoint_addr); | |
384 | ||
385 | return 0; | |
386 | } | |
387 | ||
388 | /* Register any already created translations. */ | |
0756c555 DE |
389 | |
390 | static void | |
391 | jit_inferior_init (struct gdbarch *gdbarch) | |
4efc6507 | 392 | { |
4efc6507 DE |
393 | struct jit_descriptor descriptor; |
394 | struct jit_code_entry cur_entry; | |
03673fc7 | 395 | struct jit_inferior_data *inf_data; |
4efc6507 | 396 | CORE_ADDR cur_entry_addr; |
4efc6507 | 397 | |
a255712f | 398 | if (jit_debug) |
03673fc7 | 399 | fprintf_unfiltered (gdb_stdlog, "jit_inferior_init\n"); |
a255712f | 400 | |
03673fc7 PP |
401 | inf_data = get_jit_inferior_data (); |
402 | if (jit_breakpoint_re_set_internal (gdbarch, inf_data) != 0) | |
4efc6507 DE |
403 | return; |
404 | ||
03673fc7 PP |
405 | if (inf_data->descriptor_addr == 0) |
406 | { | |
407 | struct minimal_symbol *desc_symbol; | |
4efc6507 | 408 | |
03673fc7 PP |
409 | /* Lookup the descriptor symbol and cache the addr. If it is |
410 | missing, we assume we are not attached to a JIT and return early. */ | |
411 | desc_symbol = lookup_minimal_symbol (jit_descriptor_name, NULL, NULL); | |
412 | if (desc_symbol == NULL) | |
413 | return; | |
a255712f | 414 | |
03673fc7 PP |
415 | inf_data->descriptor_addr = SYMBOL_VALUE_ADDRESS (desc_symbol); |
416 | if (inf_data->descriptor_addr == 0) | |
417 | return; | |
418 | } | |
4efc6507 | 419 | |
a255712f PP |
420 | if (jit_debug) |
421 | fprintf_unfiltered (gdb_stdlog, | |
03673fc7 PP |
422 | "jit_inferior_init, descriptor_addr = %s\n", |
423 | paddress (gdbarch, inf_data->descriptor_addr)); | |
a255712f | 424 | |
1777feb0 MS |
425 | /* Read the descriptor so we can check the version number and load |
426 | any already JITed functions. */ | |
03673fc7 | 427 | jit_read_descriptor (gdbarch, &descriptor, inf_data->descriptor_addr); |
4efc6507 DE |
428 | |
429 | /* Check that the version number agrees with that we support. */ | |
430 | if (descriptor.version != 1) | |
431 | error (_("Unsupported JIT protocol version in descriptor!")); | |
432 | ||
1777feb0 MS |
433 | /* If we've attached to a running program, we need to check the descriptor |
434 | to register any functions that were already generated. */ | |
4efc6507 DE |
435 | for (cur_entry_addr = descriptor.first_entry; |
436 | cur_entry_addr != 0; | |
437 | cur_entry_addr = cur_entry.next_entry) | |
438 | { | |
0756c555 | 439 | jit_read_code_entry (gdbarch, cur_entry_addr, &cur_entry); |
4efc6507 DE |
440 | |
441 | /* This hook may be called many times during setup, so make sure we don't | |
442 | add the same symbol file twice. */ | |
443 | if (jit_find_objf_with_entry_addr (cur_entry_addr) != NULL) | |
444 | continue; | |
445 | ||
0756c555 | 446 | jit_register_code (gdbarch, cur_entry_addr, &cur_entry); |
4efc6507 DE |
447 | } |
448 | } | |
449 | ||
0756c555 DE |
450 | /* Exported routine to call when an inferior has been created. */ |
451 | ||
452 | void | |
453 | jit_inferior_created_hook (void) | |
454 | { | |
455 | jit_inferior_init (target_gdbarch); | |
456 | } | |
457 | ||
458 | /* Exported routine to call to re-set the jit breakpoints, | |
459 | e.g. when a program is rerun. */ | |
460 | ||
461 | void | |
462 | jit_breakpoint_re_set (void) | |
463 | { | |
03673fc7 PP |
464 | jit_breakpoint_re_set_internal (target_gdbarch, |
465 | get_jit_inferior_data ()); | |
466 | } | |
467 | ||
468 | /* Reset inferior_data, so sybols will be looked up again, and jit_breakpoint | |
469 | will be reset. */ | |
470 | ||
471 | static void | |
472 | jit_reset_inferior_data_and_breakpoints (void) | |
473 | { | |
474 | struct jit_inferior_data *inf_data; | |
475 | ||
476 | /* Force jit_inferior_init to re-lookup of jit symbol addresses. */ | |
477 | inf_data = get_jit_inferior_data (); | |
478 | inf_data->breakpoint_addr = 0; | |
479 | inf_data->descriptor_addr = 0; | |
480 | ||
481 | /* Remove any existing JIT breakpoint(s). */ | |
482 | remove_jit_event_breakpoints (); | |
483 | ||
0756c555 DE |
484 | jit_inferior_init (target_gdbarch); |
485 | } | |
486 | ||
4efc6507 DE |
487 | /* Wrapper to match the observer function pointer prototype. */ |
488 | ||
489 | static void | |
0756c555 | 490 | jit_inferior_created_observer (struct target_ops *objfile, int from_tty) |
4efc6507 | 491 | { |
03673fc7 | 492 | jit_reset_inferior_data_and_breakpoints (); |
4efc6507 DE |
493 | } |
494 | ||
1777feb0 MS |
495 | /* This function cleans up any code entries left over when the |
496 | inferior exits. We get left over code when the inferior exits | |
497 | without unregistering its code, for example when it crashes. */ | |
4efc6507 DE |
498 | |
499 | static void | |
a79b8f6e | 500 | jit_inferior_exit_hook (struct inferior *inf) |
4efc6507 DE |
501 | { |
502 | struct objfile *objf; | |
503 | struct objfile *temp; | |
504 | ||
4efc6507 DE |
505 | ALL_OBJFILES_SAFE (objf, temp) |
506 | if (objfile_data (objf, jit_objfile_data) != NULL) | |
507 | jit_unregister_code (objf); | |
508 | } | |
509 | ||
03673fc7 PP |
510 | static void |
511 | jit_executable_changed_observer (void) | |
512 | { | |
513 | jit_reset_inferior_data_and_breakpoints (); | |
514 | } | |
515 | ||
4efc6507 | 516 | void |
0756c555 | 517 | jit_event_handler (struct gdbarch *gdbarch) |
4efc6507 DE |
518 | { |
519 | struct jit_descriptor descriptor; | |
520 | struct jit_code_entry code_entry; | |
521 | CORE_ADDR entry_addr; | |
522 | struct objfile *objf; | |
523 | ||
524 | /* Read the descriptor from remote memory. */ | |
03673fc7 PP |
525 | jit_read_descriptor (gdbarch, &descriptor, |
526 | get_jit_inferior_data ()->descriptor_addr); | |
4efc6507 DE |
527 | entry_addr = descriptor.relevant_entry; |
528 | ||
1777feb0 | 529 | /* Do the corresponding action. */ |
4efc6507 DE |
530 | switch (descriptor.action_flag) |
531 | { | |
532 | case JIT_NOACTION: | |
533 | break; | |
534 | case JIT_REGISTER: | |
0756c555 DE |
535 | jit_read_code_entry (gdbarch, entry_addr, &code_entry); |
536 | jit_register_code (gdbarch, entry_addr, &code_entry); | |
4efc6507 DE |
537 | break; |
538 | case JIT_UNREGISTER: | |
539 | objf = jit_find_objf_with_entry_addr (entry_addr); | |
540 | if (objf == NULL) | |
1777feb0 MS |
541 | printf_unfiltered (_("Unable to find JITed code " |
542 | "entry at address: %s\n"), | |
dfdbc9b4 | 543 | paddress (gdbarch, entry_addr)); |
4efc6507 DE |
544 | else |
545 | jit_unregister_code (objf); | |
546 | ||
547 | break; | |
548 | default: | |
549 | error (_("Unknown action_flag value in JIT descriptor!")); | |
550 | break; | |
551 | } | |
552 | } | |
553 | ||
554 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
555 | ||
556 | extern void _initialize_jit (void); | |
557 | ||
558 | void | |
559 | _initialize_jit (void) | |
560 | { | |
1777feb0 MS |
561 | add_setshow_zinteger_cmd ("jit", class_maintenance, &jit_debug, |
562 | _("Set JIT debugging."), | |
563 | _("Show JIT debugging."), | |
564 | _("When non-zero, JIT debugging is enabled."), | |
a255712f PP |
565 | NULL, |
566 | show_jit_debug, | |
567 | &setdebuglist, &showdebuglist); | |
568 | ||
0756c555 | 569 | observer_attach_inferior_created (jit_inferior_created_observer); |
4efc6507 | 570 | observer_attach_inferior_exit (jit_inferior_exit_hook); |
03673fc7 | 571 | observer_attach_executable_changed (jit_executable_changed_observer); |
4efc6507 | 572 | jit_objfile_data = register_objfile_data (); |
03673fc7 PP |
573 | jit_inferior_data = |
574 | register_inferior_data_with_cleanup (jit_inferior_data_cleanup); | |
4efc6507 | 575 | } |