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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 | ||
b8e0a31c SD |
36 | static const char *jit_reader_dir = NULL; |
37 | ||
4efc6507 DE |
38 | static const struct objfile_data *jit_objfile_data; |
39 | ||
40 | static const char *const jit_break_name = "__jit_debug_register_code"; | |
41 | ||
42 | static const char *const jit_descriptor_name = "__jit_debug_descriptor"; | |
43 | ||
03673fc7 | 44 | static const struct inferior_data *jit_inferior_data = NULL; |
4efc6507 | 45 | |
e2bd3b15 | 46 | static void jit_inferior_init (struct gdbarch *gdbarch); |
3b2a0cf2 | 47 | |
a255712f PP |
48 | /* Non-zero if we want to see trace of jit level stuff. */ |
49 | ||
50 | static int jit_debug = 0; | |
51 | ||
52 | static void | |
53 | show_jit_debug (struct ui_file *file, int from_tty, | |
54 | struct cmd_list_element *c, const char *value) | |
55 | { | |
56 | fprintf_filtered (file, _("JIT debugging is %s.\n"), value); | |
57 | } | |
58 | ||
4efc6507 DE |
59 | struct target_buffer |
60 | { | |
61 | CORE_ADDR base; | |
a255712f | 62 | ULONGEST size; |
4efc6507 DE |
63 | }; |
64 | ||
65 | /* Openning the file is a no-op. */ | |
66 | ||
67 | static void * | |
68 | mem_bfd_iovec_open (struct bfd *abfd, void *open_closure) | |
69 | { | |
70 | return open_closure; | |
71 | } | |
72 | ||
73 | /* Closing the file is just freeing the base/size pair on our side. */ | |
74 | ||
75 | static int | |
76 | mem_bfd_iovec_close (struct bfd *abfd, void *stream) | |
77 | { | |
78 | xfree (stream); | |
79 | return 1; | |
80 | } | |
81 | ||
82 | /* For reading the file, we just need to pass through to target_read_memory and | |
83 | fix up the arguments and return values. */ | |
84 | ||
85 | static file_ptr | |
86 | mem_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf, | |
87 | file_ptr nbytes, file_ptr offset) | |
88 | { | |
89 | int err; | |
90 | struct target_buffer *buffer = (struct target_buffer *) stream; | |
91 | ||
92 | /* If this read will read all of the file, limit it to just the rest. */ | |
93 | if (offset + nbytes > buffer->size) | |
94 | nbytes = buffer->size - offset; | |
95 | ||
96 | /* If there are no more bytes left, we've reached EOF. */ | |
97 | if (nbytes == 0) | |
98 | return 0; | |
99 | ||
100 | err = target_read_memory (buffer->base + offset, (gdb_byte *) buf, nbytes); | |
101 | if (err) | |
102 | return -1; | |
103 | ||
104 | return nbytes; | |
105 | } | |
106 | ||
107 | /* For statting the file, we only support the st_size attribute. */ | |
108 | ||
109 | static int | |
110 | mem_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb) | |
111 | { | |
112 | struct target_buffer *buffer = (struct target_buffer*) stream; | |
113 | ||
114 | sb->st_size = buffer->size; | |
115 | return 0; | |
116 | } | |
117 | ||
118 | /* Open a BFD from the target's memory. */ | |
119 | ||
120 | static struct bfd * | |
a255712f | 121 | bfd_open_from_target_memory (CORE_ADDR addr, ULONGEST size, char *target) |
4efc6507 DE |
122 | { |
123 | const char *filename = xstrdup ("<in-memory>"); | |
124 | struct target_buffer *buffer = xmalloc (sizeof (struct target_buffer)); | |
125 | ||
126 | buffer->base = addr; | |
127 | buffer->size = size; | |
128 | return bfd_openr_iovec (filename, target, | |
129 | mem_bfd_iovec_open, | |
130 | buffer, | |
131 | mem_bfd_iovec_pread, | |
132 | mem_bfd_iovec_close, | |
133 | mem_bfd_iovec_stat); | |
134 | } | |
135 | ||
03673fc7 PP |
136 | /* Per-inferior structure recording the addresses in the inferior. */ |
137 | ||
138 | struct jit_inferior_data | |
139 | { | |
140 | CORE_ADDR breakpoint_addr; /* &__jit_debug_register_code() */ | |
141 | CORE_ADDR descriptor_addr; /* &__jit_debug_descriptor */ | |
142 | }; | |
143 | ||
144 | /* Return jit_inferior_data for current inferior. Allocate if not already | |
145 | present. */ | |
146 | ||
147 | static struct jit_inferior_data * | |
148 | get_jit_inferior_data (void) | |
149 | { | |
150 | struct inferior *inf; | |
151 | struct jit_inferior_data *inf_data; | |
152 | ||
153 | inf = current_inferior (); | |
154 | inf_data = inferior_data (inf, jit_inferior_data); | |
155 | if (inf_data == NULL) | |
156 | { | |
157 | inf_data = XZALLOC (struct jit_inferior_data); | |
158 | set_inferior_data (inf, jit_inferior_data, inf_data); | |
159 | } | |
160 | ||
161 | return inf_data; | |
162 | } | |
163 | ||
164 | static void | |
165 | jit_inferior_data_cleanup (struct inferior *inf, void *arg) | |
166 | { | |
167 | xfree (arg); | |
168 | } | |
169 | ||
1777feb0 MS |
170 | /* Helper function for reading the global JIT descriptor from remote |
171 | memory. */ | |
4efc6507 DE |
172 | |
173 | static void | |
0756c555 | 174 | jit_read_descriptor (struct gdbarch *gdbarch, |
03673fc7 PP |
175 | struct jit_descriptor *descriptor, |
176 | CORE_ADDR descriptor_addr) | |
4efc6507 DE |
177 | { |
178 | int err; | |
179 | struct type *ptr_type; | |
180 | int ptr_size; | |
181 | int desc_size; | |
182 | gdb_byte *desc_buf; | |
0756c555 | 183 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
4efc6507 DE |
184 | |
185 | /* Figure out how big the descriptor is on the remote and how to read it. */ | |
0756c555 | 186 | ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
4efc6507 DE |
187 | ptr_size = TYPE_LENGTH (ptr_type); |
188 | desc_size = 8 + 2 * ptr_size; /* Two 32-bit ints and two pointers. */ | |
189 | desc_buf = alloca (desc_size); | |
190 | ||
191 | /* Read the descriptor. */ | |
03673fc7 | 192 | err = target_read_memory (descriptor_addr, desc_buf, desc_size); |
4efc6507 DE |
193 | if (err) |
194 | error (_("Unable to read JIT descriptor from remote memory!")); | |
195 | ||
196 | /* Fix the endianness to match the host. */ | |
197 | descriptor->version = extract_unsigned_integer (&desc_buf[0], 4, byte_order); | |
198 | descriptor->action_flag = | |
199 | extract_unsigned_integer (&desc_buf[4], 4, byte_order); | |
200 | descriptor->relevant_entry = extract_typed_address (&desc_buf[8], ptr_type); | |
201 | descriptor->first_entry = | |
202 | extract_typed_address (&desc_buf[8 + ptr_size], ptr_type); | |
203 | } | |
204 | ||
205 | /* Helper function for reading a JITed code entry from remote memory. */ | |
206 | ||
207 | static void | |
0756c555 DE |
208 | jit_read_code_entry (struct gdbarch *gdbarch, |
209 | CORE_ADDR code_addr, struct jit_code_entry *code_entry) | |
4efc6507 | 210 | { |
205c306f | 211 | int err, off; |
4efc6507 DE |
212 | struct type *ptr_type; |
213 | int ptr_size; | |
214 | int entry_size; | |
205c306f | 215 | int align_bytes; |
4efc6507 | 216 | gdb_byte *entry_buf; |
0756c555 | 217 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
4efc6507 DE |
218 | |
219 | /* Figure out how big the entry is on the remote and how to read it. */ | |
0756c555 | 220 | ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
4efc6507 DE |
221 | ptr_size = TYPE_LENGTH (ptr_type); |
222 | entry_size = 3 * ptr_size + 8; /* Three pointers and one 64-bit int. */ | |
223 | entry_buf = alloca (entry_size); | |
224 | ||
225 | /* Read the entry. */ | |
226 | err = target_read_memory (code_addr, entry_buf, entry_size); | |
227 | if (err) | |
228 | error (_("Unable to read JIT code entry from remote memory!")); | |
229 | ||
230 | /* Fix the endianness to match the host. */ | |
0756c555 | 231 | ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
4efc6507 DE |
232 | code_entry->next_entry = extract_typed_address (&entry_buf[0], ptr_type); |
233 | code_entry->prev_entry = | |
234 | extract_typed_address (&entry_buf[ptr_size], ptr_type); | |
235 | code_entry->symfile_addr = | |
236 | extract_typed_address (&entry_buf[2 * ptr_size], ptr_type); | |
205c306f DM |
237 | |
238 | align_bytes = gdbarch_long_long_align_bit (gdbarch) / 8; | |
239 | off = 3 * ptr_size; | |
240 | off = (off + (align_bytes - 1)) & ~(align_bytes - 1); | |
241 | ||
4efc6507 | 242 | code_entry->symfile_size = |
205c306f | 243 | extract_unsigned_integer (&entry_buf[off], 8, byte_order); |
4efc6507 DE |
244 | } |
245 | ||
246 | /* This function registers code associated with a JIT code entry. It uses the | |
247 | pointer and size pair in the entry to read the symbol file from the remote | |
248 | and then calls symbol_file_add_from_local_memory to add it as though it were | |
249 | a symbol file added by the user. */ | |
250 | ||
251 | static void | |
0756c555 DE |
252 | jit_register_code (struct gdbarch *gdbarch, |
253 | CORE_ADDR entry_addr, struct jit_code_entry *code_entry) | |
4efc6507 DE |
254 | { |
255 | bfd *nbfd; | |
256 | struct section_addr_info *sai; | |
257 | struct bfd_section *sec; | |
258 | struct objfile *objfile; | |
4dfb2365 | 259 | struct cleanup *old_cleanups; |
4efc6507 DE |
260 | int i; |
261 | const struct bfd_arch_info *b; | |
262 | CORE_ADDR *entry_addr_ptr; | |
263 | ||
a255712f PP |
264 | if (jit_debug) |
265 | fprintf_unfiltered (gdb_stdlog, | |
266 | "jit_register_code, symfile_addr = %s, " | |
267 | "symfile_size = %s\n", | |
268 | paddress (gdbarch, code_entry->symfile_addr), | |
269 | pulongest (code_entry->symfile_size)); | |
270 | ||
4efc6507 DE |
271 | nbfd = bfd_open_from_target_memory (code_entry->symfile_addr, |
272 | code_entry->symfile_size, gnutarget); | |
4dfb2365 JK |
273 | if (nbfd == NULL) |
274 | { | |
275 | puts_unfiltered (_("Error opening JITed symbol file, ignoring it.\n")); | |
276 | return; | |
277 | } | |
4efc6507 DE |
278 | |
279 | /* Check the format. NOTE: This initializes important data that GDB uses! | |
280 | We would segfault later without this line. */ | |
281 | if (!bfd_check_format (nbfd, bfd_object)) | |
282 | { | |
283 | printf_unfiltered (_("\ | |
284 | JITed symbol file is not an object file, ignoring it.\n")); | |
4dfb2365 | 285 | bfd_close (nbfd); |
4efc6507 DE |
286 | return; |
287 | } | |
288 | ||
289 | /* Check bfd arch. */ | |
0756c555 | 290 | b = gdbarch_bfd_arch_info (gdbarch); |
4efc6507 DE |
291 | if (b->compatible (b, bfd_get_arch_info (nbfd)) != b) |
292 | warning (_("JITed object file architecture %s is not compatible " | |
293 | "with target architecture %s."), bfd_get_arch_info | |
294 | (nbfd)->printable_name, b->printable_name); | |
295 | ||
296 | /* Read the section address information out of the symbol file. Since the | |
297 | file is generated by the JIT at runtime, it should all of the absolute | |
298 | addresses that we care about. */ | |
299 | sai = alloc_section_addr_info (bfd_count_sections (nbfd)); | |
4dfb2365 | 300 | old_cleanups = make_cleanup_free_section_addr_info (sai); |
4efc6507 DE |
301 | i = 0; |
302 | for (sec = nbfd->sections; sec != NULL; sec = sec->next) | |
303 | if ((bfd_get_section_flags (nbfd, sec) & (SEC_ALLOC|SEC_LOAD)) != 0) | |
304 | { | |
305 | /* We assume that these virtual addresses are absolute, and do not | |
306 | treat them as offsets. */ | |
307 | sai->other[i].addr = bfd_get_section_vma (nbfd, sec); | |
04a679b8 | 308 | sai->other[i].name = xstrdup (bfd_get_section_name (nbfd, sec)); |
4efc6507 DE |
309 | sai->other[i].sectindex = sec->index; |
310 | ++i; | |
311 | } | |
312 | ||
4dfb2365 | 313 | /* This call takes ownership of NBFD. It does not take ownership of SAI. */ |
63524580 | 314 | objfile = symbol_file_add_from_bfd (nbfd, 0, sai, OBJF_SHARED, NULL); |
4efc6507 | 315 | |
4efc6507 DE |
316 | /* Remember a mapping from entry_addr to objfile. */ |
317 | entry_addr_ptr = xmalloc (sizeof (CORE_ADDR)); | |
318 | *entry_addr_ptr = entry_addr; | |
319 | set_objfile_data (objfile, jit_objfile_data, entry_addr_ptr); | |
320 | ||
4dfb2365 | 321 | do_cleanups (old_cleanups); |
4efc6507 DE |
322 | } |
323 | ||
1777feb0 MS |
324 | /* This function unregisters JITed code and frees the corresponding |
325 | objfile. */ | |
4efc6507 DE |
326 | |
327 | static void | |
328 | jit_unregister_code (struct objfile *objfile) | |
329 | { | |
330 | free_objfile (objfile); | |
331 | } | |
332 | ||
333 | /* Look up the objfile with this code entry address. */ | |
334 | ||
335 | static struct objfile * | |
336 | jit_find_objf_with_entry_addr (CORE_ADDR entry_addr) | |
337 | { | |
338 | struct objfile *objf; | |
339 | CORE_ADDR *objf_entry_addr; | |
340 | ||
341 | ALL_OBJFILES (objf) | |
342 | { | |
343 | objf_entry_addr = (CORE_ADDR *) objfile_data (objf, jit_objfile_data); | |
344 | if (objf_entry_addr != NULL && *objf_entry_addr == entry_addr) | |
345 | return objf; | |
346 | } | |
347 | return NULL; | |
348 | } | |
349 | ||
03673fc7 PP |
350 | /* (Re-)Initialize the jit breakpoint if necessary. |
351 | Return 0 on success. */ | |
352 | ||
353 | static int | |
354 | jit_breakpoint_re_set_internal (struct gdbarch *gdbarch, | |
355 | struct jit_inferior_data *inf_data) | |
356 | { | |
357 | if (inf_data->breakpoint_addr == 0) | |
358 | { | |
359 | struct minimal_symbol *reg_symbol; | |
360 | ||
361 | /* Lookup the registration symbol. If it is missing, then we assume | |
362 | we are not attached to a JIT. */ | |
363 | reg_symbol = lookup_minimal_symbol (jit_break_name, NULL, NULL); | |
364 | if (reg_symbol == NULL) | |
365 | return 1; | |
366 | inf_data->breakpoint_addr = SYMBOL_VALUE_ADDRESS (reg_symbol); | |
367 | if (inf_data->breakpoint_addr == 0) | |
368 | return 2; | |
3b2a0cf2 JB |
369 | |
370 | /* If we have not read the jit descriptor yet (e.g. because the JITer | |
371 | itself is in a shared library which just got loaded), do so now. */ | |
372 | if (inf_data->descriptor_addr == 0) | |
373 | jit_inferior_init (gdbarch); | |
03673fc7 PP |
374 | } |
375 | else | |
376 | return 0; | |
377 | ||
378 | if (jit_debug) | |
379 | fprintf_unfiltered (gdb_stdlog, | |
380 | "jit_breakpoint_re_set_internal, " | |
381 | "breakpoint_addr = %s\n", | |
382 | paddress (gdbarch, inf_data->breakpoint_addr)); | |
383 | ||
384 | /* Put a breakpoint in the registration symbol. */ | |
385 | create_jit_event_breakpoint (gdbarch, inf_data->breakpoint_addr); | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
390 | /* Register any already created translations. */ | |
0756c555 DE |
391 | |
392 | static void | |
393 | jit_inferior_init (struct gdbarch *gdbarch) | |
4efc6507 | 394 | { |
4efc6507 DE |
395 | struct jit_descriptor descriptor; |
396 | struct jit_code_entry cur_entry; | |
03673fc7 | 397 | struct jit_inferior_data *inf_data; |
4efc6507 | 398 | CORE_ADDR cur_entry_addr; |
4efc6507 | 399 | |
a255712f | 400 | if (jit_debug) |
03673fc7 | 401 | fprintf_unfiltered (gdb_stdlog, "jit_inferior_init\n"); |
a255712f | 402 | |
03673fc7 PP |
403 | inf_data = get_jit_inferior_data (); |
404 | if (jit_breakpoint_re_set_internal (gdbarch, inf_data) != 0) | |
4efc6507 DE |
405 | return; |
406 | ||
03673fc7 PP |
407 | if (inf_data->descriptor_addr == 0) |
408 | { | |
409 | struct minimal_symbol *desc_symbol; | |
4efc6507 | 410 | |
03673fc7 PP |
411 | /* Lookup the descriptor symbol and cache the addr. If it is |
412 | missing, we assume we are not attached to a JIT and return early. */ | |
413 | desc_symbol = lookup_minimal_symbol (jit_descriptor_name, NULL, NULL); | |
414 | if (desc_symbol == NULL) | |
415 | return; | |
a255712f | 416 | |
03673fc7 PP |
417 | inf_data->descriptor_addr = SYMBOL_VALUE_ADDRESS (desc_symbol); |
418 | if (inf_data->descriptor_addr == 0) | |
419 | return; | |
420 | } | |
4efc6507 | 421 | |
a255712f PP |
422 | if (jit_debug) |
423 | fprintf_unfiltered (gdb_stdlog, | |
03673fc7 PP |
424 | "jit_inferior_init, descriptor_addr = %s\n", |
425 | paddress (gdbarch, inf_data->descriptor_addr)); | |
a255712f | 426 | |
1777feb0 MS |
427 | /* Read the descriptor so we can check the version number and load |
428 | any already JITed functions. */ | |
03673fc7 | 429 | jit_read_descriptor (gdbarch, &descriptor, inf_data->descriptor_addr); |
4efc6507 DE |
430 | |
431 | /* Check that the version number agrees with that we support. */ | |
432 | if (descriptor.version != 1) | |
433 | error (_("Unsupported JIT protocol version in descriptor!")); | |
434 | ||
1777feb0 MS |
435 | /* If we've attached to a running program, we need to check the descriptor |
436 | to register any functions that were already generated. */ | |
4efc6507 DE |
437 | for (cur_entry_addr = descriptor.first_entry; |
438 | cur_entry_addr != 0; | |
439 | cur_entry_addr = cur_entry.next_entry) | |
440 | { | |
0756c555 | 441 | jit_read_code_entry (gdbarch, cur_entry_addr, &cur_entry); |
4efc6507 DE |
442 | |
443 | /* This hook may be called many times during setup, so make sure we don't | |
444 | add the same symbol file twice. */ | |
445 | if (jit_find_objf_with_entry_addr (cur_entry_addr) != NULL) | |
446 | continue; | |
447 | ||
0756c555 | 448 | jit_register_code (gdbarch, cur_entry_addr, &cur_entry); |
4efc6507 DE |
449 | } |
450 | } | |
451 | ||
0756c555 DE |
452 | /* Exported routine to call when an inferior has been created. */ |
453 | ||
454 | void | |
455 | jit_inferior_created_hook (void) | |
456 | { | |
457 | jit_inferior_init (target_gdbarch); | |
458 | } | |
459 | ||
460 | /* Exported routine to call to re-set the jit breakpoints, | |
461 | e.g. when a program is rerun. */ | |
462 | ||
463 | void | |
464 | jit_breakpoint_re_set (void) | |
465 | { | |
03673fc7 PP |
466 | jit_breakpoint_re_set_internal (target_gdbarch, |
467 | get_jit_inferior_data ()); | |
468 | } | |
469 | ||
470 | /* Reset inferior_data, so sybols will be looked up again, and jit_breakpoint | |
471 | will be reset. */ | |
472 | ||
473 | static void | |
474 | jit_reset_inferior_data_and_breakpoints (void) | |
475 | { | |
476 | struct jit_inferior_data *inf_data; | |
477 | ||
478 | /* Force jit_inferior_init to re-lookup of jit symbol addresses. */ | |
479 | inf_data = get_jit_inferior_data (); | |
480 | inf_data->breakpoint_addr = 0; | |
481 | inf_data->descriptor_addr = 0; | |
482 | ||
483 | /* Remove any existing JIT breakpoint(s). */ | |
484 | remove_jit_event_breakpoints (); | |
485 | ||
0756c555 DE |
486 | jit_inferior_init (target_gdbarch); |
487 | } | |
488 | ||
4efc6507 DE |
489 | /* Wrapper to match the observer function pointer prototype. */ |
490 | ||
491 | static void | |
0756c555 | 492 | jit_inferior_created_observer (struct target_ops *objfile, int from_tty) |
4efc6507 | 493 | { |
03673fc7 | 494 | jit_reset_inferior_data_and_breakpoints (); |
4efc6507 DE |
495 | } |
496 | ||
1777feb0 MS |
497 | /* This function cleans up any code entries left over when the |
498 | inferior exits. We get left over code when the inferior exits | |
499 | without unregistering its code, for example when it crashes. */ | |
4efc6507 DE |
500 | |
501 | static void | |
a79b8f6e | 502 | jit_inferior_exit_hook (struct inferior *inf) |
4efc6507 DE |
503 | { |
504 | struct objfile *objf; | |
505 | struct objfile *temp; | |
506 | ||
4efc6507 DE |
507 | ALL_OBJFILES_SAFE (objf, temp) |
508 | if (objfile_data (objf, jit_objfile_data) != NULL) | |
509 | jit_unregister_code (objf); | |
510 | } | |
511 | ||
03673fc7 PP |
512 | static void |
513 | jit_executable_changed_observer (void) | |
514 | { | |
515 | jit_reset_inferior_data_and_breakpoints (); | |
516 | } | |
517 | ||
4efc6507 | 518 | void |
0756c555 | 519 | jit_event_handler (struct gdbarch *gdbarch) |
4efc6507 DE |
520 | { |
521 | struct jit_descriptor descriptor; | |
522 | struct jit_code_entry code_entry; | |
523 | CORE_ADDR entry_addr; | |
524 | struct objfile *objf; | |
525 | ||
526 | /* Read the descriptor from remote memory. */ | |
03673fc7 PP |
527 | jit_read_descriptor (gdbarch, &descriptor, |
528 | get_jit_inferior_data ()->descriptor_addr); | |
4efc6507 DE |
529 | entry_addr = descriptor.relevant_entry; |
530 | ||
1777feb0 | 531 | /* Do the corresponding action. */ |
4efc6507 DE |
532 | switch (descriptor.action_flag) |
533 | { | |
534 | case JIT_NOACTION: | |
535 | break; | |
536 | case JIT_REGISTER: | |
0756c555 DE |
537 | jit_read_code_entry (gdbarch, entry_addr, &code_entry); |
538 | jit_register_code (gdbarch, entry_addr, &code_entry); | |
4efc6507 DE |
539 | break; |
540 | case JIT_UNREGISTER: | |
541 | objf = jit_find_objf_with_entry_addr (entry_addr); | |
542 | if (objf == NULL) | |
1777feb0 MS |
543 | printf_unfiltered (_("Unable to find JITed code " |
544 | "entry at address: %s\n"), | |
dfdbc9b4 | 545 | paddress (gdbarch, entry_addr)); |
4efc6507 DE |
546 | else |
547 | jit_unregister_code (objf); | |
548 | ||
549 | break; | |
550 | default: | |
551 | error (_("Unknown action_flag value in JIT descriptor!")); | |
552 | break; | |
553 | } | |
554 | } | |
555 | ||
556 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
557 | ||
558 | extern void _initialize_jit (void); | |
559 | ||
560 | void | |
561 | _initialize_jit (void) | |
562 | { | |
b8e0a31c SD |
563 | jit_reader_dir = relocate_gdb_directory (JIT_READER_DIR, |
564 | JIT_READER_DIR_RELOCATABLE); | |
1777feb0 MS |
565 | add_setshow_zinteger_cmd ("jit", class_maintenance, &jit_debug, |
566 | _("Set JIT debugging."), | |
567 | _("Show JIT debugging."), | |
568 | _("When non-zero, JIT debugging is enabled."), | |
a255712f PP |
569 | NULL, |
570 | show_jit_debug, | |
571 | &setdebuglist, &showdebuglist); | |
572 | ||
0756c555 | 573 | observer_attach_inferior_created (jit_inferior_created_observer); |
4efc6507 | 574 | observer_attach_inferior_exit (jit_inferior_exit_hook); |
03673fc7 | 575 | observer_attach_executable_changed (jit_executable_changed_observer); |
4efc6507 | 576 | jit_objfile_data = register_objfile_data (); |
03673fc7 PP |
577 | jit_inferior_data = |
578 | register_inferior_data_with_cleanup (jit_inferior_data_cleanup); | |
4efc6507 | 579 | } |