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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" | |
784c47ee | 39 | #include "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 | |
b8e0a31c SD |
45 | static const char *jit_reader_dir = NULL; |
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 | ||
8eacb197 | 53 | static const struct program_space_data *jit_program_space_data = NULL; |
4efc6507 | 54 | |
e2bd3b15 | 55 | static void jit_inferior_init (struct gdbarch *gdbarch); |
20aa2c60 | 56 | static void jit_inferior_exit_hook (struct inferior *inf); |
3b2a0cf2 | 57 | |
3623dc3a SD |
58 | /* An unwinder is registered for every gdbarch. This key is used to |
59 | remember if the unwinder has been registered for a particular | |
60 | gdbarch. */ | |
61 | ||
62 | static struct gdbarch_data *jit_gdbarch_data; | |
63 | ||
a255712f PP |
64 | /* Non-zero if we want to see trace of jit level stuff. */ |
65 | ||
ccce17b0 | 66 | static unsigned int jit_debug = 0; |
a255712f PP |
67 | |
68 | static void | |
69 | show_jit_debug (struct ui_file *file, int from_tty, | |
70 | struct cmd_list_element *c, const char *value) | |
71 | { | |
72 | fprintf_filtered (file, _("JIT debugging is %s.\n"), value); | |
73 | } | |
74 | ||
4efc6507 DE |
75 | struct target_buffer |
76 | { | |
77 | CORE_ADDR base; | |
a255712f | 78 | ULONGEST size; |
4efc6507 DE |
79 | }; |
80 | ||
81 | /* Openning the file is a no-op. */ | |
82 | ||
83 | static void * | |
84 | mem_bfd_iovec_open (struct bfd *abfd, void *open_closure) | |
85 | { | |
86 | return open_closure; | |
87 | } | |
88 | ||
89 | /* Closing the file is just freeing the base/size pair on our side. */ | |
90 | ||
91 | static int | |
92 | mem_bfd_iovec_close (struct bfd *abfd, void *stream) | |
93 | { | |
94 | xfree (stream); | |
39ed5604 JK |
95 | |
96 | /* Zero means success. */ | |
97 | return 0; | |
4efc6507 DE |
98 | } |
99 | ||
100 | /* For reading the file, we just need to pass through to target_read_memory and | |
101 | fix up the arguments and return values. */ | |
102 | ||
103 | static file_ptr | |
104 | mem_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf, | |
105 | file_ptr nbytes, file_ptr offset) | |
106 | { | |
107 | int err; | |
108 | struct target_buffer *buffer = (struct target_buffer *) stream; | |
109 | ||
110 | /* If this read will read all of the file, limit it to just the rest. */ | |
111 | if (offset + nbytes > buffer->size) | |
112 | nbytes = buffer->size - offset; | |
113 | ||
114 | /* If there are no more bytes left, we've reached EOF. */ | |
115 | if (nbytes == 0) | |
116 | return 0; | |
117 | ||
118 | err = target_read_memory (buffer->base + offset, (gdb_byte *) buf, nbytes); | |
119 | if (err) | |
120 | return -1; | |
121 | ||
122 | return nbytes; | |
123 | } | |
124 | ||
125 | /* For statting the file, we only support the st_size attribute. */ | |
126 | ||
127 | static int | |
128 | mem_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb) | |
129 | { | |
130 | struct target_buffer *buffer = (struct target_buffer*) stream; | |
131 | ||
326a5c7e | 132 | memset (sb, 0, sizeof (struct stat)); |
4efc6507 DE |
133 | sb->st_size = buffer->size; |
134 | return 0; | |
135 | } | |
136 | ||
f0bbc364 TT |
137 | /* Open a BFD from the target's memory. */ |
138 | ||
192b62ce | 139 | static gdb_bfd_ref_ptr |
f0bbc364 TT |
140 | bfd_open_from_target_memory (CORE_ADDR addr, ULONGEST size, char *target) |
141 | { | |
8d749320 | 142 | struct target_buffer *buffer = XNEW (struct target_buffer); |
f0bbc364 TT |
143 | |
144 | buffer->base = addr; | |
145 | buffer->size = size; | |
64c31149 TT |
146 | return gdb_bfd_openr_iovec ("<in-memory>", target, |
147 | mem_bfd_iovec_open, | |
148 | buffer, | |
149 | mem_bfd_iovec_pread, | |
150 | mem_bfd_iovec_close, | |
151 | mem_bfd_iovec_stat); | |
f0bbc364 TT |
152 | } |
153 | ||
0e8621a0 TT |
154 | struct jit_reader |
155 | { | |
156 | jit_reader (struct gdb_reader_funcs *f, gdb_dlhandle_up &&h) | |
157 | : functions (f), handle (std::move (h)) | |
158 | { | |
159 | } | |
160 | ||
161 | ~jit_reader () | |
162 | { | |
163 | functions->destroy (functions); | |
164 | } | |
165 | ||
d6541620 | 166 | DISABLE_COPY_AND_ASSIGN (jit_reader); |
0e8621a0 TT |
167 | |
168 | struct gdb_reader_funcs *functions; | |
169 | gdb_dlhandle_up handle; | |
170 | }; | |
171 | ||
784c47ee SD |
172 | /* One reader that has been loaded successfully, and can potentially be used to |
173 | parse debug info. */ | |
174 | ||
0e8621a0 | 175 | static struct jit_reader *loaded_jit_reader = NULL; |
784c47ee SD |
176 | |
177 | typedef struct gdb_reader_funcs * (reader_init_fn_type) (void); | |
178 | static const char *reader_init_fn_sym = "gdb_init_reader"; | |
179 | ||
180 | /* Try to load FILE_NAME as a JIT debug info reader. */ | |
181 | ||
182 | static struct jit_reader * | |
183 | jit_reader_load (const char *file_name) | |
184 | { | |
784c47ee | 185 | reader_init_fn_type *init_fn; |
784c47ee | 186 | struct gdb_reader_funcs *funcs = NULL; |
784c47ee SD |
187 | |
188 | if (jit_debug) | |
189 | fprintf_unfiltered (gdb_stdlog, _("Opening shared object %s.\n"), | |
190 | file_name); | |
0e8621a0 | 191 | gdb_dlhandle_up so = gdb_dlopen (file_name); |
784c47ee | 192 | |
15cf126c | 193 | init_fn = (reader_init_fn_type *) gdb_dlsym (so, reader_init_fn_sym); |
784c47ee SD |
194 | if (!init_fn) |
195 | error (_("Could not locate initialization function: %s."), | |
196 | reader_init_fn_sym); | |
197 | ||
198 | if (gdb_dlsym (so, "plugin_is_GPL_compatible") == NULL) | |
199 | error (_("Reader not GPL compatible.")); | |
200 | ||
201 | funcs = init_fn (); | |
202 | if (funcs->reader_version != GDB_READER_INTERFACE_VERSION) | |
203 | error (_("Reader version does not match GDB version.")); | |
204 | ||
0e8621a0 | 205 | return new jit_reader (funcs, std::move (so)); |
784c47ee SD |
206 | } |
207 | ||
208 | /* Provides the jit-reader-load command. */ | |
209 | ||
210 | static void | |
0b39b52e | 211 | jit_reader_load_command (const char *args, int from_tty) |
784c47ee | 212 | { |
784c47ee SD |
213 | if (args == NULL) |
214 | error (_("No reader name provided.")); | |
7c218e6c | 215 | gdb::unique_xmalloc_ptr<char> file (tilde_expand (args)); |
784c47ee SD |
216 | |
217 | if (loaded_jit_reader != NULL) | |
218 | error (_("JIT reader already loaded. Run jit-reader-unload first.")); | |
219 | ||
7c218e6c TT |
220 | if (!IS_ABSOLUTE_PATH (file.get ())) |
221 | file.reset (xstrprintf ("%s%s%s", jit_reader_dir, SLASH_STRING, | |
222 | file.get ())); | |
784c47ee | 223 | |
7c218e6c | 224 | loaded_jit_reader = jit_reader_load (file.get ()); |
20aa2c60 PA |
225 | reinit_frame_cache (); |
226 | jit_inferior_created_hook (); | |
784c47ee SD |
227 | } |
228 | ||
229 | /* Provides the jit-reader-unload command. */ | |
230 | ||
231 | static void | |
0b39b52e | 232 | jit_reader_unload_command (const char *args, int from_tty) |
784c47ee SD |
233 | { |
234 | if (!loaded_jit_reader) | |
235 | error (_("No JIT reader loaded.")); | |
236 | ||
20aa2c60 PA |
237 | reinit_frame_cache (); |
238 | jit_inferior_exit_hook (current_inferior ()); | |
784c47ee | 239 | |
0e8621a0 | 240 | delete loaded_jit_reader; |
784c47ee SD |
241 | loaded_jit_reader = NULL; |
242 | } | |
243 | ||
8eacb197 | 244 | /* Per-program space structure recording which objfile has the JIT |
03bef283 | 245 | symbols. */ |
03673fc7 | 246 | |
8eacb197 | 247 | struct jit_program_space_data |
03673fc7 | 248 | { |
03bef283 TT |
249 | /* The objfile. This is NULL if no objfile holds the JIT |
250 | symbols. */ | |
251 | ||
252 | struct objfile *objfile; | |
f25c0135 | 253 | |
8eacb197 | 254 | /* If this program space has __jit_debug_register_code, this is the |
f25c0135 TT |
255 | cached address from the minimal symbol. This is used to detect |
256 | relocations requiring the breakpoint to be re-created. */ | |
257 | ||
258 | CORE_ADDR cached_code_address; | |
259 | ||
260 | /* This is the JIT event breakpoint, or NULL if it has not been | |
261 | set. */ | |
262 | ||
263 | struct breakpoint *jit_breakpoint; | |
03bef283 TT |
264 | }; |
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 TT |
318 | static struct jit_program_space_data * |
319 | get_jit_program_space_data (void) | |
03673fc7 | 320 | { |
8eacb197 | 321 | struct jit_program_space_data *ps_data; |
03673fc7 | 322 | |
9a3c8263 SM |
323 | ps_data |
324 | = ((struct jit_program_space_data *) | |
325 | program_space_data (current_program_space, jit_program_space_data)); | |
8eacb197 | 326 | if (ps_data == NULL) |
03673fc7 | 327 | { |
41bf6aca | 328 | ps_data = XCNEW (struct jit_program_space_data); |
8eacb197 TT |
329 | set_program_space_data (current_program_space, jit_program_space_data, |
330 | ps_data); | |
03673fc7 PP |
331 | } |
332 | ||
8eacb197 | 333 | return ps_data; |
03673fc7 PP |
334 | } |
335 | ||
336 | static void | |
8eacb197 | 337 | jit_program_space_data_cleanup (struct program_space *ps, void *arg) |
03673fc7 PP |
338 | { |
339 | xfree (arg); | |
340 | } | |
341 | ||
1777feb0 | 342 | /* Helper function for reading the global JIT descriptor from remote |
03bef283 | 343 | memory. Returns 1 if all went well, 0 otherwise. */ |
4efc6507 | 344 | |
03bef283 | 345 | static int |
0756c555 | 346 | jit_read_descriptor (struct gdbarch *gdbarch, |
03673fc7 | 347 | struct jit_descriptor *descriptor, |
8eacb197 | 348 | struct jit_program_space_data *ps_data) |
4efc6507 DE |
349 | { |
350 | int err; | |
351 | struct type *ptr_type; | |
352 | int ptr_size; | |
353 | int desc_size; | |
354 | gdb_byte *desc_buf; | |
0756c555 | 355 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
03bef283 TT |
356 | struct jit_objfile_data *objf_data; |
357 | ||
8eacb197 | 358 | if (ps_data->objfile == NULL) |
03bef283 | 359 | return 0; |
8eacb197 | 360 | objf_data = get_jit_objfile_data (ps_data->objfile); |
03bef283 TT |
361 | if (objf_data->descriptor == NULL) |
362 | return 0; | |
363 | ||
364 | if (jit_debug) | |
365 | fprintf_unfiltered (gdb_stdlog, | |
366 | "jit_read_descriptor, descriptor_addr = %s\n", | |
77e371c0 TT |
367 | paddress (gdbarch, MSYMBOL_VALUE_ADDRESS (ps_data->objfile, |
368 | objf_data->descriptor))); | |
4efc6507 DE |
369 | |
370 | /* Figure out how big the descriptor is on the remote and how to read it. */ | |
0756c555 | 371 | ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
4efc6507 DE |
372 | ptr_size = TYPE_LENGTH (ptr_type); |
373 | desc_size = 8 + 2 * ptr_size; /* Two 32-bit ints and two pointers. */ | |
224c3ddb | 374 | desc_buf = (gdb_byte *) alloca (desc_size); |
4efc6507 DE |
375 | |
376 | /* Read the descriptor. */ | |
77e371c0 TT |
377 | err = target_read_memory (MSYMBOL_VALUE_ADDRESS (ps_data->objfile, |
378 | objf_data->descriptor), | |
03bef283 | 379 | desc_buf, desc_size); |
4efc6507 | 380 | if (err) |
03bef283 TT |
381 | { |
382 | printf_unfiltered (_("Unable to read JIT descriptor from " | |
383 | "remote memory\n")); | |
384 | return 0; | |
385 | } | |
4efc6507 DE |
386 | |
387 | /* Fix the endianness to match the host. */ | |
388 | descriptor->version = extract_unsigned_integer (&desc_buf[0], 4, byte_order); | |
389 | descriptor->action_flag = | |
390 | extract_unsigned_integer (&desc_buf[4], 4, byte_order); | |
391 | descriptor->relevant_entry = extract_typed_address (&desc_buf[8], ptr_type); | |
392 | descriptor->first_entry = | |
393 | extract_typed_address (&desc_buf[8 + ptr_size], ptr_type); | |
03bef283 TT |
394 | |
395 | return 1; | |
4efc6507 DE |
396 | } |
397 | ||
398 | /* Helper function for reading a JITed code entry from remote memory. */ | |
399 | ||
400 | static void | |
0756c555 DE |
401 | jit_read_code_entry (struct gdbarch *gdbarch, |
402 | CORE_ADDR code_addr, struct jit_code_entry *code_entry) | |
4efc6507 | 403 | { |
205c306f | 404 | int err, off; |
4efc6507 DE |
405 | struct type *ptr_type; |
406 | int ptr_size; | |
407 | int entry_size; | |
205c306f | 408 | int align_bytes; |
4efc6507 | 409 | gdb_byte *entry_buf; |
0756c555 | 410 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
4efc6507 DE |
411 | |
412 | /* Figure out how big the entry is on the remote and how to read it. */ | |
0756c555 | 413 | ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
4efc6507 | 414 | ptr_size = TYPE_LENGTH (ptr_type); |
227ee7fc | 415 | |
e11fb955 TT |
416 | /* Figure out where the uint64_t value will be. */ |
417 | align_bytes = type_align (builtin_type (gdbarch)->builtin_uint64); | |
227ee7fc RH |
418 | off = 3 * ptr_size; |
419 | off = (off + (align_bytes - 1)) & ~(align_bytes - 1); | |
420 | ||
421 | entry_size = off + 8; /* Three pointers and one 64-bit int. */ | |
224c3ddb | 422 | entry_buf = (gdb_byte *) alloca (entry_size); |
4efc6507 DE |
423 | |
424 | /* Read the entry. */ | |
425 | err = target_read_memory (code_addr, entry_buf, entry_size); | |
426 | if (err) | |
427 | error (_("Unable to read JIT code entry from remote memory!")); | |
428 | ||
429 | /* Fix the endianness to match the host. */ | |
0756c555 | 430 | ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
4efc6507 DE |
431 | code_entry->next_entry = extract_typed_address (&entry_buf[0], ptr_type); |
432 | code_entry->prev_entry = | |
433 | extract_typed_address (&entry_buf[ptr_size], ptr_type); | |
434 | code_entry->symfile_addr = | |
435 | extract_typed_address (&entry_buf[2 * ptr_size], ptr_type); | |
436 | code_entry->symfile_size = | |
205c306f | 437 | extract_unsigned_integer (&entry_buf[off], 8, byte_order); |
4efc6507 DE |
438 | } |
439 | ||
1825a88d SD |
440 | /* Proxy object for building a block. */ |
441 | ||
442 | struct gdb_block | |
443 | { | |
444 | /* gdb_blocks are linked into a tree structure. Next points to the | |
445 | next node at the same depth as this block and parent to the | |
446 | parent gdb_block. */ | |
447 | struct gdb_block *next, *parent; | |
448 | ||
449 | /* Points to the "real" block that is being built out of this | |
450 | instance. This block will be added to a blockvector, which will | |
451 | then be added to a symtab. */ | |
452 | struct block *real_block; | |
453 | ||
454 | /* The first and last code address corresponding to this block. */ | |
455 | CORE_ADDR begin, end; | |
456 | ||
457 | /* The name of this block (if any). If this is non-NULL, the | |
458 | FUNCTION symbol symbol is set to this value. */ | |
459 | const char *name; | |
460 | }; | |
461 | ||
462 | /* Proxy object for building a symtab. */ | |
463 | ||
464 | struct gdb_symtab | |
465 | { | |
466 | /* The list of blocks in this symtab. These will eventually be | |
467 | converted to real blocks. */ | |
468 | struct gdb_block *blocks; | |
469 | ||
470 | /* The number of blocks inserted. */ | |
471 | int nblocks; | |
472 | ||
473 | /* A mapping between line numbers to PC. */ | |
474 | struct linetable *linetable; | |
475 | ||
476 | /* The source file for this symtab. */ | |
477 | const char *file_name; | |
478 | struct gdb_symtab *next; | |
479 | }; | |
480 | ||
481 | /* Proxy object for building an object. */ | |
482 | ||
483 | struct gdb_object | |
484 | { | |
485 | struct gdb_symtab *symtabs; | |
486 | }; | |
487 | ||
488 | /* The type of the `private' data passed around by the callback | |
489 | functions. */ | |
490 | ||
491 | typedef CORE_ADDR jit_dbg_reader_data; | |
492 | ||
493 | /* The reader calls into this function to read data off the targets | |
494 | address space. */ | |
495 | ||
496 | static enum gdb_status | |
497 | jit_target_read_impl (GDB_CORE_ADDR target_mem, void *gdb_buf, int len) | |
498 | { | |
cb0a2700 SM |
499 | int result = target_read_memory ((CORE_ADDR) target_mem, |
500 | (gdb_byte *) gdb_buf, len); | |
1825a88d SD |
501 | if (result == 0) |
502 | return GDB_SUCCESS; | |
503 | else | |
504 | return GDB_FAIL; | |
505 | } | |
506 | ||
507 | /* The reader calls into this function to create a new gdb_object | |
508 | which it can then pass around to the other callbacks. Right now, | |
509 | all that is required is allocating the memory. */ | |
510 | ||
511 | static struct gdb_object * | |
512 | jit_object_open_impl (struct gdb_symbol_callbacks *cb) | |
513 | { | |
514 | /* CB is not required right now, but sometime in the future we might | |
515 | need a handle to it, and we'd like to do that without breaking | |
516 | the ABI. */ | |
41bf6aca | 517 | return XCNEW (struct gdb_object); |
1825a88d SD |
518 | } |
519 | ||
520 | /* Readers call into this function to open a new gdb_symtab, which, | |
521 | again, is passed around to other callbacks. */ | |
522 | ||
523 | static struct gdb_symtab * | |
524 | jit_symtab_open_impl (struct gdb_symbol_callbacks *cb, | |
525 | struct gdb_object *object, | |
526 | const char *file_name) | |
527 | { | |
528 | struct gdb_symtab *ret; | |
529 | ||
530 | /* CB stays unused. See comment in jit_object_open_impl. */ | |
531 | ||
41bf6aca | 532 | ret = XCNEW (struct gdb_symtab); |
1825a88d SD |
533 | ret->file_name = file_name ? xstrdup (file_name) : xstrdup (""); |
534 | ret->next = object->symtabs; | |
535 | object->symtabs = ret; | |
536 | return ret; | |
537 | } | |
538 | ||
539 | /* Returns true if the block corresponding to old should be placed | |
540 | before the block corresponding to new in the final blockvector. */ | |
541 | ||
542 | static int | |
543 | compare_block (const struct gdb_block *const old, | |
fe978cb0 | 544 | const struct gdb_block *const newobj) |
1825a88d SD |
545 | { |
546 | if (old == NULL) | |
547 | return 1; | |
fe978cb0 | 548 | if (old->begin < newobj->begin) |
1825a88d | 549 | return 1; |
fe978cb0 | 550 | else if (old->begin == newobj->begin) |
1825a88d | 551 | { |
fe978cb0 | 552 | if (old->end > newobj->end) |
1825a88d SD |
553 | return 1; |
554 | else | |
555 | return 0; | |
556 | } | |
557 | else | |
558 | return 0; | |
559 | } | |
560 | ||
561 | /* Called by readers to open a new gdb_block. This function also | |
562 | inserts the new gdb_block in the correct place in the corresponding | |
563 | gdb_symtab. */ | |
564 | ||
565 | static struct gdb_block * | |
566 | jit_block_open_impl (struct gdb_symbol_callbacks *cb, | |
567 | struct gdb_symtab *symtab, struct gdb_block *parent, | |
568 | GDB_CORE_ADDR begin, GDB_CORE_ADDR end, const char *name) | |
569 | { | |
41bf6aca | 570 | struct gdb_block *block = XCNEW (struct gdb_block); |
1825a88d SD |
571 | |
572 | block->next = symtab->blocks; | |
573 | block->begin = (CORE_ADDR) begin; | |
574 | block->end = (CORE_ADDR) end; | |
575 | block->name = name ? xstrdup (name) : NULL; | |
576 | block->parent = parent; | |
577 | ||
578 | /* Ensure that the blocks are inserted in the correct (reverse of | |
579 | the order expected by blockvector). */ | |
580 | if (compare_block (symtab->blocks, block)) | |
581 | { | |
582 | symtab->blocks = block; | |
583 | } | |
584 | else | |
585 | { | |
586 | struct gdb_block *i = symtab->blocks; | |
587 | ||
588 | for (;; i = i->next) | |
589 | { | |
590 | /* Guaranteed to terminate, since compare_block (NULL, _) | |
591 | returns 1. */ | |
592 | if (compare_block (i->next, block)) | |
593 | { | |
594 | block->next = i->next; | |
595 | i->next = block; | |
596 | break; | |
597 | } | |
598 | } | |
599 | } | |
600 | symtab->nblocks++; | |
601 | ||
602 | return block; | |
603 | } | |
604 | ||
605 | /* Readers call this to add a line mapping (from PC to line number) to | |
606 | a gdb_symtab. */ | |
4efc6507 DE |
607 | |
608 | static void | |
1825a88d SD |
609 | jit_symtab_line_mapping_add_impl (struct gdb_symbol_callbacks *cb, |
610 | struct gdb_symtab *stab, int nlines, | |
611 | struct gdb_line_mapping *map) | |
612 | { | |
613 | int i; | |
224c3ddb | 614 | int alloc_len; |
1825a88d SD |
615 | |
616 | if (nlines < 1) | |
617 | return; | |
618 | ||
224c3ddb SM |
619 | alloc_len = sizeof (struct linetable) |
620 | + (nlines - 1) * sizeof (struct linetable_entry); | |
621 | stab->linetable = (struct linetable *) xmalloc (alloc_len); | |
1825a88d SD |
622 | stab->linetable->nitems = nlines; |
623 | for (i = 0; i < nlines; i++) | |
624 | { | |
625 | stab->linetable->item[i].pc = (CORE_ADDR) map[i].pc; | |
626 | stab->linetable->item[i].line = map[i].line; | |
627 | } | |
628 | } | |
629 | ||
630 | /* Called by readers to close a gdb_symtab. Does not need to do | |
631 | anything as of now. */ | |
632 | ||
633 | static void | |
634 | jit_symtab_close_impl (struct gdb_symbol_callbacks *cb, | |
635 | struct gdb_symtab *stab) | |
636 | { | |
637 | /* Right now nothing needs to be done here. We may need to do some | |
638 | cleanup here in the future (again, without breaking the plugin | |
639 | ABI). */ | |
640 | } | |
641 | ||
642 | /* Transform STAB to a proper symtab, and add it it OBJFILE. */ | |
643 | ||
644 | static void | |
645 | finalize_symtab (struct gdb_symtab *stab, struct objfile *objfile) | |
646 | { | |
43f3e411 | 647 | struct compunit_symtab *cust; |
1825a88d SD |
648 | struct gdb_block *gdb_block_iter, *gdb_block_iter_tmp; |
649 | struct block *block_iter; | |
241fd515 AM |
650 | int actual_nblocks, i; |
651 | size_t blockvector_size; | |
1825a88d | 652 | CORE_ADDR begin, end; |
346d1dfe | 653 | struct blockvector *bv; |
1825a88d SD |
654 | |
655 | actual_nblocks = FIRST_LOCAL_BLOCK + stab->nblocks; | |
656 | ||
43f3e411 DE |
657 | cust = allocate_compunit_symtab (objfile, stab->file_name); |
658 | allocate_symtab (cust, stab->file_name); | |
659 | add_compunit_symtab_to_objfile (cust); | |
660 | ||
1825a88d | 661 | /* JIT compilers compile in memory. */ |
43f3e411 | 662 | COMPUNIT_DIRNAME (cust) = NULL; |
1825a88d SD |
663 | |
664 | /* Copy over the linetable entry if one was provided. */ | |
665 | if (stab->linetable) | |
666 | { | |
241fd515 AM |
667 | size_t size = ((stab->linetable->nitems - 1) |
668 | * sizeof (struct linetable_entry) | |
669 | + sizeof (struct linetable)); | |
43f3e411 | 670 | SYMTAB_LINETABLE (COMPUNIT_FILETABS (cust)) |
224c3ddb | 671 | = (struct linetable *) obstack_alloc (&objfile->objfile_obstack, size); |
43f3e411 DE |
672 | memcpy (SYMTAB_LINETABLE (COMPUNIT_FILETABS (cust)), stab->linetable, |
673 | size); | |
1825a88d SD |
674 | } |
675 | ||
676 | blockvector_size = (sizeof (struct blockvector) | |
677 | + (actual_nblocks - 1) * sizeof (struct block *)); | |
224c3ddb SM |
678 | bv = (struct blockvector *) obstack_alloc (&objfile->objfile_obstack, |
679 | blockvector_size); | |
43f3e411 | 680 | COMPUNIT_BLOCKVECTOR (cust) = bv; |
1825a88d SD |
681 | |
682 | /* (begin, end) will contain the PC range this entire blockvector | |
683 | spans. */ | |
346d1dfe | 684 | BLOCKVECTOR_MAP (bv) = NULL; |
1825a88d SD |
685 | begin = stab->blocks->begin; |
686 | end = stab->blocks->end; | |
346d1dfe | 687 | BLOCKVECTOR_NBLOCKS (bv) = actual_nblocks; |
1825a88d SD |
688 | |
689 | /* First run over all the gdb_block objects, creating a real block | |
690 | object for each. Simultaneously, keep setting the real_block | |
691 | fields. */ | |
692 | for (i = (actual_nblocks - 1), gdb_block_iter = stab->blocks; | |
693 | i >= FIRST_LOCAL_BLOCK; | |
694 | i--, gdb_block_iter = gdb_block_iter->next) | |
695 | { | |
696 | struct block *new_block = allocate_block (&objfile->objfile_obstack); | |
e623cf5d | 697 | struct symbol *block_name = allocate_symbol (objfile); |
2535757a TT |
698 | struct type *block_type = arch_type (get_objfile_arch (objfile), |
699 | TYPE_CODE_VOID, | |
77b7c781 | 700 | TARGET_CHAR_BIT, |
2535757a | 701 | "void"); |
1825a88d | 702 | |
b026f593 KS |
703 | BLOCK_MULTIDICT (new_block) |
704 | = mdict_create_linear (&objfile->objfile_obstack, NULL); | |
1825a88d SD |
705 | /* The address range. */ |
706 | BLOCK_START (new_block) = (CORE_ADDR) gdb_block_iter->begin; | |
707 | BLOCK_END (new_block) = (CORE_ADDR) gdb_block_iter->end; | |
708 | ||
709 | /* The name. */ | |
1825a88d | 710 | SYMBOL_DOMAIN (block_name) = VAR_DOMAIN; |
f1e6e072 | 711 | SYMBOL_ACLASS_INDEX (block_name) = LOC_BLOCK; |
08be3fe3 | 712 | symbol_set_symtab (block_name, COMPUNIT_FILETABS (cust)); |
2535757a | 713 | SYMBOL_TYPE (block_name) = lookup_function_type (block_type); |
1825a88d SD |
714 | SYMBOL_BLOCK_VALUE (block_name) = new_block; |
715 | ||
224c3ddb SM |
716 | block_name->ginfo.name |
717 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
718 | gdb_block_iter->name, | |
719 | strlen (gdb_block_iter->name)); | |
1825a88d SD |
720 | |
721 | BLOCK_FUNCTION (new_block) = block_name; | |
722 | ||
346d1dfe | 723 | BLOCKVECTOR_BLOCK (bv, i) = new_block; |
1825a88d SD |
724 | if (begin > BLOCK_START (new_block)) |
725 | begin = BLOCK_START (new_block); | |
726 | if (end < BLOCK_END (new_block)) | |
727 | end = BLOCK_END (new_block); | |
728 | ||
729 | gdb_block_iter->real_block = new_block; | |
730 | } | |
731 | ||
732 | /* Now add the special blocks. */ | |
733 | block_iter = NULL; | |
734 | for (i = 0; i < FIRST_LOCAL_BLOCK; i++) | |
735 | { | |
84a146c9 TT |
736 | struct block *new_block; |
737 | ||
738 | new_block = (i == GLOBAL_BLOCK | |
739 | ? allocate_global_block (&objfile->objfile_obstack) | |
740 | : allocate_block (&objfile->objfile_obstack)); | |
b026f593 KS |
741 | BLOCK_MULTIDICT (new_block) |
742 | = mdict_create_linear (&objfile->objfile_obstack, NULL); | |
1825a88d SD |
743 | BLOCK_SUPERBLOCK (new_block) = block_iter; |
744 | block_iter = new_block; | |
745 | ||
746 | BLOCK_START (new_block) = (CORE_ADDR) begin; | |
747 | BLOCK_END (new_block) = (CORE_ADDR) end; | |
748 | ||
346d1dfe | 749 | BLOCKVECTOR_BLOCK (bv, i) = new_block; |
84a146c9 TT |
750 | |
751 | if (i == GLOBAL_BLOCK) | |
43f3e411 | 752 | set_block_compunit_symtab (new_block, cust); |
1825a88d SD |
753 | } |
754 | ||
755 | /* Fill up the superblock fields for the real blocks, using the | |
756 | real_block fields populated earlier. */ | |
757 | for (gdb_block_iter = stab->blocks; | |
758 | gdb_block_iter; | |
759 | gdb_block_iter = gdb_block_iter->next) | |
760 | { | |
761 | if (gdb_block_iter->parent != NULL) | |
db334a01 SD |
762 | { |
763 | /* If the plugin specifically mentioned a parent block, we | |
764 | use that. */ | |
765 | BLOCK_SUPERBLOCK (gdb_block_iter->real_block) = | |
766 | gdb_block_iter->parent->real_block; | |
767 | } | |
768 | else | |
769 | { | |
770 | /* And if not, we set a default parent block. */ | |
771 | BLOCK_SUPERBLOCK (gdb_block_iter->real_block) = | |
346d1dfe | 772 | BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); |
db334a01 | 773 | } |
1825a88d SD |
774 | } |
775 | ||
776 | /* Free memory. */ | |
777 | gdb_block_iter = stab->blocks; | |
778 | ||
779 | for (gdb_block_iter = stab->blocks, gdb_block_iter_tmp = gdb_block_iter->next; | |
780 | gdb_block_iter; | |
781 | gdb_block_iter = gdb_block_iter_tmp) | |
782 | { | |
783 | xfree ((void *) gdb_block_iter->name); | |
784 | xfree (gdb_block_iter); | |
785 | } | |
786 | xfree (stab->linetable); | |
787 | xfree ((char *) stab->file_name); | |
788 | xfree (stab); | |
789 | } | |
790 | ||
791 | /* Called when closing a gdb_objfile. Converts OBJ to a proper | |
792 | objfile. */ | |
793 | ||
794 | static void | |
795 | jit_object_close_impl (struct gdb_symbol_callbacks *cb, | |
796 | struct gdb_object *obj) | |
797 | { | |
798 | struct gdb_symtab *i, *j; | |
799 | struct objfile *objfile; | |
800 | jit_dbg_reader_data *priv_data; | |
801 | ||
9a3c8263 | 802 | priv_data = (jit_dbg_reader_data *) cb->priv_data; |
1825a88d | 803 | |
9e86da07 TT |
804 | objfile = new struct objfile (NULL, "<< JIT compiled code >>", |
805 | OBJF_NOT_FILENAME); | |
df6d5441 | 806 | objfile->per_bfd->gdbarch = target_gdbarch (); |
1825a88d | 807 | |
1825a88d SD |
808 | j = NULL; |
809 | for (i = obj->symtabs; i; i = j) | |
810 | { | |
811 | j = i->next; | |
812 | finalize_symtab (i, objfile); | |
813 | } | |
814 | add_objfile_entry (objfile, *priv_data); | |
815 | xfree (obj); | |
816 | } | |
817 | ||
744ab88c | 818 | /* Try to read CODE_ENTRY using the loaded jit reader (if any). |
b4264740 SD |
819 | ENTRY_ADDR is the address of the struct jit_code_entry in the |
820 | inferior address space. */ | |
1825a88d SD |
821 | |
822 | static int | |
744ab88c SD |
823 | jit_reader_try_read_symtab (struct jit_code_entry *code_entry, |
824 | CORE_ADDR entry_addr) | |
1825a88d | 825 | { |
7c543f7b | 826 | gdb_byte *gdb_mem; |
1825a88d | 827 | int status; |
1825a88d SD |
828 | jit_dbg_reader_data priv_data; |
829 | struct gdb_reader_funcs *funcs; | |
1825a88d SD |
830 | struct gdb_symbol_callbacks callbacks = |
831 | { | |
832 | jit_object_open_impl, | |
833 | jit_symtab_open_impl, | |
834 | jit_block_open_impl, | |
835 | jit_symtab_close_impl, | |
836 | jit_object_close_impl, | |
837 | ||
838 | jit_symtab_line_mapping_add_impl, | |
839 | jit_target_read_impl, | |
840 | ||
841 | &priv_data | |
842 | }; | |
843 | ||
744ab88c | 844 | priv_data = entry_addr; |
1825a88d SD |
845 | |
846 | if (!loaded_jit_reader) | |
847 | return 0; | |
848 | ||
7c543f7b | 849 | gdb_mem = (gdb_byte *) xmalloc (code_entry->symfile_size); |
1825a88d SD |
850 | |
851 | status = 1; | |
a70b8144 | 852 | try |
492d29ea PA |
853 | { |
854 | if (target_read_memory (code_entry->symfile_addr, gdb_mem, | |
855 | code_entry->symfile_size)) | |
856 | status = 0; | |
857 | } | |
230d2906 | 858 | catch (const gdb_exception &e) |
492d29ea | 859 | { |
1825a88d | 860 | status = 0; |
492d29ea | 861 | } |
1825a88d SD |
862 | |
863 | if (status) | |
864 | { | |
865 | funcs = loaded_jit_reader->functions; | |
866 | if (funcs->read (funcs, &callbacks, gdb_mem, code_entry->symfile_size) | |
867 | != GDB_SUCCESS) | |
868 | status = 0; | |
869 | } | |
870 | ||
871 | xfree (gdb_mem); | |
872 | if (jit_debug && status == 0) | |
873 | fprintf_unfiltered (gdb_stdlog, | |
874 | "Could not read symtab using the loaded JIT reader.\n"); | |
875 | return status; | |
876 | } | |
877 | ||
744ab88c | 878 | /* Try to read CODE_ENTRY using BFD. ENTRY_ADDR is the address of the |
b4264740 | 879 | struct jit_code_entry in the inferior address space. */ |
1825a88d SD |
880 | |
881 | static void | |
882 | jit_bfd_try_read_symtab (struct jit_code_entry *code_entry, | |
744ab88c | 883 | CORE_ADDR entry_addr, |
1825a88d | 884 | struct gdbarch *gdbarch) |
4efc6507 | 885 | { |
4efc6507 DE |
886 | struct bfd_section *sec; |
887 | struct objfile *objfile; | |
4efc6507 | 888 | const struct bfd_arch_info *b; |
4efc6507 | 889 | |
a255712f PP |
890 | if (jit_debug) |
891 | fprintf_unfiltered (gdb_stdlog, | |
892 | "jit_register_code, symfile_addr = %s, " | |
893 | "symfile_size = %s\n", | |
894 | paddress (gdbarch, code_entry->symfile_addr), | |
895 | pulongest (code_entry->symfile_size)); | |
896 | ||
192b62ce TT |
897 | gdb_bfd_ref_ptr nbfd (bfd_open_from_target_memory (code_entry->symfile_addr, |
898 | code_entry->symfile_size, | |
899 | gnutarget)); | |
4dfb2365 JK |
900 | if (nbfd == NULL) |
901 | { | |
902 | puts_unfiltered (_("Error opening JITed symbol file, ignoring it.\n")); | |
903 | return; | |
904 | } | |
4efc6507 DE |
905 | |
906 | /* Check the format. NOTE: This initializes important data that GDB uses! | |
907 | We would segfault later without this line. */ | |
192b62ce | 908 | if (!bfd_check_format (nbfd.get (), bfd_object)) |
4efc6507 DE |
909 | { |
910 | printf_unfiltered (_("\ | |
911 | JITed symbol file is not an object file, ignoring it.\n")); | |
4efc6507 DE |
912 | return; |
913 | } | |
914 | ||
915 | /* Check bfd arch. */ | |
0756c555 | 916 | b = gdbarch_bfd_arch_info (gdbarch); |
192b62ce | 917 | if (b->compatible (b, bfd_get_arch_info (nbfd.get ())) != b) |
4efc6507 | 918 | warning (_("JITed object file architecture %s is not compatible " |
192b62ce TT |
919 | "with target architecture %s."), |
920 | bfd_get_arch_info (nbfd.get ())->printable_name, | |
921 | b->printable_name); | |
4efc6507 DE |
922 | |
923 | /* Read the section address information out of the symbol file. Since the | |
924 | file is generated by the JIT at runtime, it should all of the absolute | |
925 | addresses that we care about. */ | |
37e136b1 | 926 | section_addr_info sai; |
4efc6507 | 927 | for (sec = nbfd->sections; sec != NULL; sec = sec->next) |
192b62ce | 928 | if ((bfd_get_section_flags (nbfd.get (), sec) & (SEC_ALLOC|SEC_LOAD)) != 0) |
4efc6507 DE |
929 | { |
930 | /* We assume that these virtual addresses are absolute, and do not | |
931 | treat them as offsets. */ | |
37e136b1 TT |
932 | sai.emplace_back (bfd_get_section_vma (nbfd.get (), sec), |
933 | bfd_get_section_name (nbfd.get (), sec), | |
934 | sec->index); | |
4efc6507 DE |
935 | } |
936 | ||
8ac244b4 | 937 | /* This call does not take ownership of SAI. */ |
192b62ce | 938 | objfile = symbol_file_add_from_bfd (nbfd.get (), |
37e136b1 TT |
939 | bfd_get_filename (nbfd.get ()), 0, |
940 | &sai, | |
40135bb1 | 941 | OBJF_SHARED | OBJF_NOT_FILENAME, NULL); |
4efc6507 | 942 | |
744ab88c | 943 | add_objfile_entry (objfile, entry_addr); |
1825a88d SD |
944 | } |
945 | ||
946 | /* This function registers code associated with a JIT code entry. It uses the | |
947 | pointer and size pair in the entry to read the symbol file from the remote | |
948 | and then calls symbol_file_add_from_local_memory to add it as though it were | |
949 | a symbol file added by the user. */ | |
950 | ||
951 | static void | |
952 | jit_register_code (struct gdbarch *gdbarch, | |
953 | CORE_ADDR entry_addr, struct jit_code_entry *code_entry) | |
954 | { | |
974a734b | 955 | int success; |
1825a88d SD |
956 | |
957 | if (jit_debug) | |
958 | fprintf_unfiltered (gdb_stdlog, | |
959 | "jit_register_code, symfile_addr = %s, " | |
960 | "symfile_size = %s\n", | |
961 | paddress (gdbarch, code_entry->symfile_addr), | |
962 | pulongest (code_entry->symfile_size)); | |
963 | ||
744ab88c | 964 | success = jit_reader_try_read_symtab (code_entry, entry_addr); |
1825a88d SD |
965 | |
966 | if (!success) | |
744ab88c | 967 | jit_bfd_try_read_symtab (code_entry, entry_addr, gdbarch); |
4efc6507 DE |
968 | } |
969 | ||
1777feb0 MS |
970 | /* This function unregisters JITed code and frees the corresponding |
971 | objfile. */ | |
4efc6507 DE |
972 | |
973 | static void | |
974 | jit_unregister_code (struct objfile *objfile) | |
975 | { | |
9e86da07 | 976 | delete objfile; |
4efc6507 DE |
977 | } |
978 | ||
979 | /* Look up the objfile with this code entry address. */ | |
980 | ||
981 | static struct objfile * | |
982 | jit_find_objf_with_entry_addr (CORE_ADDR entry_addr) | |
983 | { | |
2030c079 | 984 | for (objfile *objf : current_program_space->objfiles ()) |
4efc6507 | 985 | { |
03bef283 TT |
986 | struct jit_objfile_data *objf_data; |
987 | ||
9a3c8263 SM |
988 | objf_data |
989 | = (struct jit_objfile_data *) objfile_data (objf, jit_objfile_data); | |
03bef283 | 990 | if (objf_data != NULL && objf_data->addr == entry_addr) |
4efc6507 DE |
991 | return objf; |
992 | } | |
993 | return NULL; | |
994 | } | |
995 | ||
f25c0135 TT |
996 | /* This is called when a breakpoint is deleted. It updates the |
997 | inferior's cache, if needed. */ | |
998 | ||
999 | static void | |
1000 | jit_breakpoint_deleted (struct breakpoint *b) | |
1001 | { | |
1002 | struct bp_location *iter; | |
1003 | ||
1004 | if (b->type != bp_jit_event) | |
1005 | return; | |
1006 | ||
1007 | for (iter = b->loc; iter != NULL; iter = iter->next) | |
8eacb197 TT |
1008 | { |
1009 | struct jit_program_space_data *ps_data; | |
1010 | ||
9a3c8263 SM |
1011 | ps_data = ((struct jit_program_space_data *) |
1012 | program_space_data (iter->pspace, jit_program_space_data)); | |
8eacb197 TT |
1013 | if (ps_data != NULL && ps_data->jit_breakpoint == iter->owner) |
1014 | { | |
1015 | ps_data->cached_code_address = 0; | |
1016 | ps_data->jit_breakpoint = NULL; | |
1017 | } | |
1018 | } | |
f25c0135 TT |
1019 | } |
1020 | ||
03673fc7 | 1021 | /* (Re-)Initialize the jit breakpoint if necessary. |
9bb84c9f | 1022 | Return 0 if the jit breakpoint has been successfully initialized. */ |
03673fc7 PP |
1023 | |
1024 | static int | |
1025 | jit_breakpoint_re_set_internal (struct gdbarch *gdbarch, | |
8eacb197 | 1026 | struct jit_program_space_data *ps_data) |
03673fc7 | 1027 | { |
7cbd4a93 | 1028 | struct bound_minimal_symbol reg_symbol; |
3b7344d5 | 1029 | struct bound_minimal_symbol desc_symbol; |
03bef283 | 1030 | struct jit_objfile_data *objf_data; |
f25c0135 | 1031 | CORE_ADDR addr; |
03bef283 | 1032 | |
8eacb197 | 1033 | if (ps_data->objfile == NULL) |
f25c0135 TT |
1034 | { |
1035 | /* Lookup the registration symbol. If it is missing, then we | |
1036 | assume we are not attached to a JIT. */ | |
64cc34d8 | 1037 | reg_symbol = lookup_bound_minimal_symbol (jit_break_name); |
7cbd4a93 | 1038 | if (reg_symbol.minsym == NULL |
77e371c0 | 1039 | || BMSYMBOL_VALUE_ADDRESS (reg_symbol) == 0) |
f25c0135 | 1040 | return 1; |
03bef283 | 1041 | |
7cbd4a93 TT |
1042 | desc_symbol = lookup_minimal_symbol (jit_descriptor_name, NULL, |
1043 | reg_symbol.objfile); | |
3b7344d5 | 1044 | if (desc_symbol.minsym == NULL |
77e371c0 | 1045 | || BMSYMBOL_VALUE_ADDRESS (desc_symbol) == 0) |
f25c0135 | 1046 | return 1; |
03bef283 | 1047 | |
7cbd4a93 TT |
1048 | objf_data = get_jit_objfile_data (reg_symbol.objfile); |
1049 | objf_data->register_code = reg_symbol.minsym; | |
3b7344d5 | 1050 | objf_data->descriptor = desc_symbol.minsym; |
03bef283 | 1051 | |
7cbd4a93 | 1052 | ps_data->objfile = reg_symbol.objfile; |
f25c0135 TT |
1053 | } |
1054 | else | |
8eacb197 | 1055 | objf_data = get_jit_objfile_data (ps_data->objfile); |
03bef283 | 1056 | |
77e371c0 | 1057 | addr = MSYMBOL_VALUE_ADDRESS (ps_data->objfile, objf_data->register_code); |
03bef283 | 1058 | |
03673fc7 PP |
1059 | if (jit_debug) |
1060 | fprintf_unfiltered (gdb_stdlog, | |
1061 | "jit_breakpoint_re_set_internal, " | |
1062 | "breakpoint_addr = %s\n", | |
f25c0135 TT |
1063 | paddress (gdbarch, addr)); |
1064 | ||
8eacb197 | 1065 | if (ps_data->cached_code_address == addr) |
9bb84c9f | 1066 | return 0; |
f25c0135 TT |
1067 | |
1068 | /* Delete the old breakpoint. */ | |
8eacb197 TT |
1069 | if (ps_data->jit_breakpoint != NULL) |
1070 | delete_breakpoint (ps_data->jit_breakpoint); | |
03673fc7 PP |
1071 | |
1072 | /* Put a breakpoint in the registration symbol. */ | |
8eacb197 TT |
1073 | ps_data->cached_code_address = addr; |
1074 | ps_data->jit_breakpoint = create_jit_event_breakpoint (gdbarch, addr); | |
03673fc7 PP |
1075 | |
1076 | return 0; | |
1077 | } | |
1078 | ||
3623dc3a SD |
1079 | /* The private data passed around in the frame unwind callback |
1080 | functions. */ | |
1081 | ||
1082 | struct jit_unwind_private | |
1083 | { | |
1084 | /* Cached register values. See jit_frame_sniffer to see how this | |
1085 | works. */ | |
c8ec2f33 | 1086 | detached_regcache *regcache; |
3623dc3a SD |
1087 | |
1088 | /* The frame being unwound. */ | |
1089 | struct frame_info *this_frame; | |
1090 | }; | |
1091 | ||
1092 | /* Sets the value of a particular register in this frame. */ | |
1093 | ||
1094 | static void | |
1095 | jit_unwind_reg_set_impl (struct gdb_unwind_callbacks *cb, int dwarf_regnum, | |
1096 | struct gdb_reg_value *value) | |
1097 | { | |
1098 | struct jit_unwind_private *priv; | |
1099 | int gdb_reg; | |
1100 | ||
9a3c8263 | 1101 | priv = (struct jit_unwind_private *) cb->priv_data; |
3623dc3a SD |
1102 | |
1103 | gdb_reg = gdbarch_dwarf2_reg_to_regnum (get_frame_arch (priv->this_frame), | |
1104 | dwarf_regnum); | |
1105 | if (gdb_reg == -1) | |
1106 | { | |
1107 | if (jit_debug) | |
1108 | fprintf_unfiltered (gdb_stdlog, | |
1109 | _("Could not recognize DWARF regnum %d"), | |
1110 | dwarf_regnum); | |
20aa2c60 | 1111 | value->free (value); |
3623dc3a SD |
1112 | return; |
1113 | } | |
1114 | ||
c8ec2f33 | 1115 | priv->regcache->raw_supply (gdb_reg, value->value); |
20aa2c60 | 1116 | value->free (value); |
3623dc3a SD |
1117 | } |
1118 | ||
1119 | static void | |
1120 | reg_value_free_impl (struct gdb_reg_value *value) | |
1121 | { | |
1122 | xfree (value); | |
1123 | } | |
1124 | ||
1125 | /* Get the value of register REGNUM in the previous frame. */ | |
1126 | ||
1127 | static struct gdb_reg_value * | |
1128 | jit_unwind_reg_get_impl (struct gdb_unwind_callbacks *cb, int regnum) | |
1129 | { | |
1130 | struct jit_unwind_private *priv; | |
1131 | struct gdb_reg_value *value; | |
1132 | int gdb_reg, size; | |
1133 | struct gdbarch *frame_arch; | |
1134 | ||
9a3c8263 | 1135 | priv = (struct jit_unwind_private *) cb->priv_data; |
3623dc3a SD |
1136 | frame_arch = get_frame_arch (priv->this_frame); |
1137 | ||
1138 | gdb_reg = gdbarch_dwarf2_reg_to_regnum (frame_arch, regnum); | |
1139 | size = register_size (frame_arch, gdb_reg); | |
224c3ddb SM |
1140 | value = ((struct gdb_reg_value *) |
1141 | xmalloc (sizeof (struct gdb_reg_value) + size - 1)); | |
ca9d61b9 JB |
1142 | value->defined = deprecated_frame_register_read (priv->this_frame, gdb_reg, |
1143 | value->value); | |
3623dc3a SD |
1144 | value->size = size; |
1145 | value->free = reg_value_free_impl; | |
1146 | return value; | |
1147 | } | |
1148 | ||
1149 | /* gdb_reg_value has a free function, which must be called on each | |
1150 | saved register value. */ | |
1151 | ||
1152 | static void | |
1153 | jit_dealloc_cache (struct frame_info *this_frame, void *cache) | |
1154 | { | |
9a3c8263 | 1155 | struct jit_unwind_private *priv_data = (struct jit_unwind_private *) cache; |
3623dc3a | 1156 | |
20aa2c60 | 1157 | gdb_assert (priv_data->regcache != NULL); |
c0e383c6 | 1158 | delete priv_data->regcache; |
3623dc3a SD |
1159 | xfree (priv_data); |
1160 | } | |
1161 | ||
1162 | /* The frame sniffer for the pseudo unwinder. | |
1163 | ||
1164 | While this is nominally a frame sniffer, in the case where the JIT | |
1165 | reader actually recognizes the frame, it does a lot more work -- it | |
1166 | unwinds the frame and saves the corresponding register values in | |
1167 | the cache. jit_frame_prev_register simply returns the saved | |
1168 | register values. */ | |
1169 | ||
1170 | static int | |
1171 | jit_frame_sniffer (const struct frame_unwind *self, | |
1172 | struct frame_info *this_frame, void **cache) | |
1173 | { | |
3623dc3a | 1174 | struct jit_unwind_private *priv_data; |
3623dc3a SD |
1175 | struct gdb_unwind_callbacks callbacks; |
1176 | struct gdb_reader_funcs *funcs; | |
1177 | ||
3623dc3a SD |
1178 | callbacks.reg_get = jit_unwind_reg_get_impl; |
1179 | callbacks.reg_set = jit_unwind_reg_set_impl; | |
1180 | callbacks.target_read = jit_target_read_impl; | |
1181 | ||
1182 | if (loaded_jit_reader == NULL) | |
1183 | return 0; | |
1184 | ||
1185 | funcs = loaded_jit_reader->functions; | |
1186 | ||
1187 | gdb_assert (!*cache); | |
1188 | ||
41bf6aca | 1189 | *cache = XCNEW (struct jit_unwind_private); |
9a3c8263 | 1190 | priv_data = (struct jit_unwind_private *) *cache; |
c8ec2f33 YQ |
1191 | /* Take a snapshot of current regcache. */ |
1192 | priv_data->regcache = new detached_regcache (get_frame_arch (this_frame), | |
1193 | true); | |
3623dc3a SD |
1194 | priv_data->this_frame = this_frame; |
1195 | ||
1196 | callbacks.priv_data = priv_data; | |
1197 | ||
1198 | /* Try to coax the provided unwinder to unwind the stack */ | |
1199 | if (funcs->unwind (funcs, &callbacks) == GDB_SUCCESS) | |
1200 | { | |
1201 | if (jit_debug) | |
1202 | fprintf_unfiltered (gdb_stdlog, _("Successfully unwound frame using " | |
1203 | "JIT reader.\n")); | |
1204 | return 1; | |
1205 | } | |
1206 | if (jit_debug) | |
1207 | fprintf_unfiltered (gdb_stdlog, _("Could not unwind frame using " | |
1208 | "JIT reader.\n")); | |
1209 | ||
1210 | jit_dealloc_cache (this_frame, *cache); | |
1211 | *cache = NULL; | |
1212 | ||
1213 | return 0; | |
1214 | } | |
1215 | ||
1216 | ||
1217 | /* The frame_id function for the pseudo unwinder. Relays the call to | |
1218 | the loaded plugin. */ | |
1219 | ||
1220 | static void | |
1221 | jit_frame_this_id (struct frame_info *this_frame, void **cache, | |
1222 | struct frame_id *this_id) | |
1223 | { | |
fe978cb0 | 1224 | struct jit_unwind_private priv; |
3623dc3a SD |
1225 | struct gdb_frame_id frame_id; |
1226 | struct gdb_reader_funcs *funcs; | |
1227 | struct gdb_unwind_callbacks callbacks; | |
1228 | ||
20aa2c60 | 1229 | priv.regcache = NULL; |
fe978cb0 | 1230 | priv.this_frame = this_frame; |
3623dc3a SD |
1231 | |
1232 | /* We don't expect the frame_id function to set any registers, so we | |
1233 | set reg_set to NULL. */ | |
1234 | callbacks.reg_get = jit_unwind_reg_get_impl; | |
1235 | callbacks.reg_set = NULL; | |
1236 | callbacks.target_read = jit_target_read_impl; | |
fe978cb0 | 1237 | callbacks.priv_data = &priv; |
3623dc3a SD |
1238 | |
1239 | gdb_assert (loaded_jit_reader); | |
1240 | funcs = loaded_jit_reader->functions; | |
1241 | ||
1242 | frame_id = funcs->get_frame_id (funcs, &callbacks); | |
1243 | *this_id = frame_id_build (frame_id.stack_address, frame_id.code_address); | |
1244 | } | |
1245 | ||
1246 | /* Pseudo unwinder function. Reads the previously fetched value for | |
1247 | the register from the cache. */ | |
1248 | ||
1249 | static struct value * | |
1250 | jit_frame_prev_register (struct frame_info *this_frame, void **cache, int reg) | |
1251 | { | |
9a3c8263 | 1252 | struct jit_unwind_private *priv = (struct jit_unwind_private *) *cache; |
20aa2c60 | 1253 | struct gdbarch *gdbarch; |
3623dc3a SD |
1254 | |
1255 | if (priv == NULL) | |
1256 | return frame_unwind_got_optimized (this_frame, reg); | |
1257 | ||
ac7936df | 1258 | gdbarch = priv->regcache->arch (); |
3f5a868b YQ |
1259 | gdb_byte *buf = (gdb_byte *) alloca (register_size (gdbarch, reg)); |
1260 | enum register_status status = priv->regcache->cooked_read (reg, buf); | |
20aa2c60 | 1261 | |
3f5a868b YQ |
1262 | if (status == REG_VALID) |
1263 | return frame_unwind_got_bytes (this_frame, reg, buf); | |
3623dc3a | 1264 | else |
3f5a868b | 1265 | return frame_unwind_got_optimized (this_frame, reg); |
3623dc3a SD |
1266 | } |
1267 | ||
1268 | /* Relay everything back to the unwinder registered by the JIT debug | |
1269 | info reader.*/ | |
1270 | ||
1271 | static const struct frame_unwind jit_frame_unwind = | |
1272 | { | |
1273 | NORMAL_FRAME, | |
1274 | default_frame_unwind_stop_reason, | |
1275 | jit_frame_this_id, | |
1276 | jit_frame_prev_register, | |
1277 | NULL, | |
1278 | jit_frame_sniffer, | |
1279 | jit_dealloc_cache | |
1280 | }; | |
1281 | ||
1282 | ||
1283 | /* This is the information that is stored at jit_gdbarch_data for each | |
1284 | architecture. */ | |
1285 | ||
1286 | struct jit_gdbarch_data_type | |
1287 | { | |
1288 | /* Has the (pseudo) unwinder been prepended? */ | |
1289 | int unwinder_registered; | |
1290 | }; | |
1291 | ||
1292 | /* Check GDBARCH and prepend the pseudo JIT unwinder if needed. */ | |
1293 | ||
1294 | static void | |
1295 | jit_prepend_unwinder (struct gdbarch *gdbarch) | |
1296 | { | |
1297 | struct jit_gdbarch_data_type *data; | |
1298 | ||
9a3c8263 SM |
1299 | data |
1300 | = (struct jit_gdbarch_data_type *) gdbarch_data (gdbarch, jit_gdbarch_data); | |
3623dc3a SD |
1301 | if (!data->unwinder_registered) |
1302 | { | |
1303 | frame_unwind_prepend_unwinder (gdbarch, &jit_frame_unwind); | |
1304 | data->unwinder_registered = 1; | |
1305 | } | |
1306 | } | |
1307 | ||
03673fc7 | 1308 | /* Register any already created translations. */ |
0756c555 DE |
1309 | |
1310 | static void | |
1311 | jit_inferior_init (struct gdbarch *gdbarch) | |
4efc6507 | 1312 | { |
4efc6507 DE |
1313 | struct jit_descriptor descriptor; |
1314 | struct jit_code_entry cur_entry; | |
8eacb197 | 1315 | struct jit_program_space_data *ps_data; |
4efc6507 | 1316 | CORE_ADDR cur_entry_addr; |
4efc6507 | 1317 | |
a255712f | 1318 | if (jit_debug) |
03673fc7 | 1319 | fprintf_unfiltered (gdb_stdlog, "jit_inferior_init\n"); |
a255712f | 1320 | |
3623dc3a SD |
1321 | jit_prepend_unwinder (gdbarch); |
1322 | ||
8eacb197 TT |
1323 | ps_data = get_jit_program_space_data (); |
1324 | if (jit_breakpoint_re_set_internal (gdbarch, ps_data) != 0) | |
4efc6507 DE |
1325 | return; |
1326 | ||
1777feb0 MS |
1327 | /* Read the descriptor so we can check the version number and load |
1328 | any already JITed functions. */ | |
8eacb197 | 1329 | if (!jit_read_descriptor (gdbarch, &descriptor, ps_data)) |
03bef283 | 1330 | return; |
4efc6507 DE |
1331 | |
1332 | /* Check that the version number agrees with that we support. */ | |
1333 | if (descriptor.version != 1) | |
03bef283 TT |
1334 | { |
1335 | printf_unfiltered (_("Unsupported JIT protocol version %ld " | |
1336 | "in descriptor (expected 1)\n"), | |
1337 | (long) descriptor.version); | |
1338 | return; | |
1339 | } | |
4efc6507 | 1340 | |
1777feb0 MS |
1341 | /* If we've attached to a running program, we need to check the descriptor |
1342 | to register any functions that were already generated. */ | |
4efc6507 DE |
1343 | for (cur_entry_addr = descriptor.first_entry; |
1344 | cur_entry_addr != 0; | |
1345 | cur_entry_addr = cur_entry.next_entry) | |
1346 | { | |
0756c555 | 1347 | jit_read_code_entry (gdbarch, cur_entry_addr, &cur_entry); |
4efc6507 DE |
1348 | |
1349 | /* This hook may be called many times during setup, so make sure we don't | |
1350 | add the same symbol file twice. */ | |
1351 | if (jit_find_objf_with_entry_addr (cur_entry_addr) != NULL) | |
1352 | continue; | |
1353 | ||
0756c555 | 1354 | jit_register_code (gdbarch, cur_entry_addr, &cur_entry); |
4efc6507 DE |
1355 | } |
1356 | } | |
1357 | ||
9bb84c9f YY |
1358 | /* inferior_created observer. */ |
1359 | ||
1360 | static void | |
1361 | jit_inferior_created (struct target_ops *ops, int from_tty) | |
1362 | { | |
1363 | jit_inferior_created_hook (); | |
1364 | } | |
1365 | ||
0756c555 DE |
1366 | /* Exported routine to call when an inferior has been created. */ |
1367 | ||
1368 | void | |
1369 | jit_inferior_created_hook (void) | |
1370 | { | |
f5656ead | 1371 | jit_inferior_init (target_gdbarch ()); |
0756c555 DE |
1372 | } |
1373 | ||
1374 | /* Exported routine to call to re-set the jit breakpoints, | |
1375 | e.g. when a program is rerun. */ | |
1376 | ||
1377 | void | |
1378 | jit_breakpoint_re_set (void) | |
1379 | { | |
f5656ead | 1380 | jit_breakpoint_re_set_internal (target_gdbarch (), |
8eacb197 | 1381 | get_jit_program_space_data ()); |
03673fc7 PP |
1382 | } |
1383 | ||
1777feb0 MS |
1384 | /* This function cleans up any code entries left over when the |
1385 | inferior exits. We get left over code when the inferior exits | |
1386 | without unregistering its code, for example when it crashes. */ | |
4efc6507 DE |
1387 | |
1388 | static void | |
a79b8f6e | 1389 | jit_inferior_exit_hook (struct inferior *inf) |
4efc6507 | 1390 | { |
7e955d83 | 1391 | for (objfile *objf : current_program_space->objfiles_safe ()) |
03bef283 | 1392 | { |
9a3c8263 SM |
1393 | struct jit_objfile_data *objf_data |
1394 | = (struct jit_objfile_data *) objfile_data (objf, jit_objfile_data); | |
4efc6507 | 1395 | |
03bef283 TT |
1396 | if (objf_data != NULL && objf_data->addr != 0) |
1397 | jit_unregister_code (objf); | |
1398 | } | |
03673fc7 PP |
1399 | } |
1400 | ||
4efc6507 | 1401 | void |
0756c555 | 1402 | jit_event_handler (struct gdbarch *gdbarch) |
4efc6507 DE |
1403 | { |
1404 | struct jit_descriptor descriptor; | |
1405 | struct jit_code_entry code_entry; | |
1406 | CORE_ADDR entry_addr; | |
1407 | struct objfile *objf; | |
1408 | ||
1409 | /* Read the descriptor from remote memory. */ | |
8eacb197 TT |
1410 | if (!jit_read_descriptor (gdbarch, &descriptor, |
1411 | get_jit_program_space_data ())) | |
03bef283 | 1412 | return; |
4efc6507 DE |
1413 | entry_addr = descriptor.relevant_entry; |
1414 | ||
1777feb0 | 1415 | /* Do the corresponding action. */ |
4efc6507 DE |
1416 | switch (descriptor.action_flag) |
1417 | { | |
1418 | case JIT_NOACTION: | |
1419 | break; | |
1420 | case JIT_REGISTER: | |
0756c555 DE |
1421 | jit_read_code_entry (gdbarch, entry_addr, &code_entry); |
1422 | jit_register_code (gdbarch, entry_addr, &code_entry); | |
4efc6507 DE |
1423 | break; |
1424 | case JIT_UNREGISTER: | |
1425 | objf = jit_find_objf_with_entry_addr (entry_addr); | |
1426 | if (objf == NULL) | |
1777feb0 MS |
1427 | printf_unfiltered (_("Unable to find JITed code " |
1428 | "entry at address: %s\n"), | |
dfdbc9b4 | 1429 | paddress (gdbarch, entry_addr)); |
4efc6507 DE |
1430 | else |
1431 | jit_unregister_code (objf); | |
1432 | ||
1433 | break; | |
1434 | default: | |
1435 | error (_("Unknown action_flag value in JIT descriptor!")); | |
1436 | break; | |
1437 | } | |
1438 | } | |
1439 | ||
8eacb197 | 1440 | /* Called to free the data allocated to the jit_program_space_data slot. */ |
1825a88d SD |
1441 | |
1442 | static void | |
1443 | free_objfile_data (struct objfile *objfile, void *data) | |
1444 | { | |
9a3c8263 | 1445 | struct jit_objfile_data *objf_data = (struct jit_objfile_data *) data; |
03bef283 TT |
1446 | |
1447 | if (objf_data->register_code != NULL) | |
1448 | { | |
8eacb197 | 1449 | struct jit_program_space_data *ps_data; |
03bef283 | 1450 | |
9a3c8263 SM |
1451 | ps_data |
1452 | = ((struct jit_program_space_data *) | |
1453 | program_space_data (objfile->pspace, jit_program_space_data)); | |
8eacb197 | 1454 | if (ps_data != NULL && ps_data->objfile == objfile) |
4a556533 PA |
1455 | { |
1456 | ps_data->objfile = NULL; | |
2cd8cc0b TT |
1457 | if (ps_data->jit_breakpoint != NULL) |
1458 | delete_breakpoint (ps_data->jit_breakpoint); | |
4a556533 PA |
1459 | ps_data->cached_code_address = 0; |
1460 | } | |
03bef283 TT |
1461 | } |
1462 | ||
1825a88d SD |
1463 | xfree (data); |
1464 | } | |
1465 | ||
3623dc3a SD |
1466 | /* Initialize the jit_gdbarch_data slot with an instance of struct |
1467 | jit_gdbarch_data_type */ | |
1468 | ||
1469 | static void * | |
1470 | jit_gdbarch_data_init (struct obstack *obstack) | |
1471 | { | |
8d749320 SM |
1472 | struct jit_gdbarch_data_type *data = |
1473 | XOBNEW (obstack, struct jit_gdbarch_data_type); | |
3623dc3a | 1474 | |
3623dc3a | 1475 | data->unwinder_registered = 0; |
8d749320 | 1476 | |
3623dc3a SD |
1477 | return data; |
1478 | } | |
1479 | ||
4efc6507 DE |
1480 | void |
1481 | _initialize_jit (void) | |
1482 | { | |
b8e0a31c SD |
1483 | jit_reader_dir = relocate_gdb_directory (JIT_READER_DIR, |
1484 | JIT_READER_DIR_RELOCATABLE); | |
ccce17b0 YQ |
1485 | add_setshow_zuinteger_cmd ("jit", class_maintenance, &jit_debug, |
1486 | _("Set JIT debugging."), | |
1487 | _("Show JIT debugging."), | |
1488 | _("When non-zero, JIT debugging is enabled."), | |
1489 | NULL, | |
1490 | show_jit_debug, | |
1491 | &setdebuglist, &showdebuglist); | |
a255712f | 1492 | |
76727919 TT |
1493 | gdb::observers::inferior_created.attach (jit_inferior_created); |
1494 | gdb::observers::inferior_exit.attach (jit_inferior_exit_hook); | |
1495 | gdb::observers::breakpoint_deleted.attach (jit_breakpoint_deleted); | |
f25c0135 | 1496 | |
1825a88d SD |
1497 | jit_objfile_data = |
1498 | register_objfile_data_with_cleanup (NULL, free_objfile_data); | |
8eacb197 TT |
1499 | jit_program_space_data = |
1500 | register_program_space_data_with_cleanup (NULL, | |
1501 | jit_program_space_data_cleanup); | |
3623dc3a | 1502 | jit_gdbarch_data = gdbarch_data_register_pre_init (jit_gdbarch_data_init); |
784c47ee SD |
1503 | if (is_dl_available ()) |
1504 | { | |
6571a381 TT |
1505 | struct cmd_list_element *c; |
1506 | ||
1507 | c = add_com ("jit-reader-load", no_class, jit_reader_load_command, _("\ | |
784c47ee SD |
1508 | Load FILE as debug info reader and unwinder for JIT compiled code.\n\ |
1509 | Usage: jit-reader-load FILE\n\ | |
1510 | Try to load file FILE as a debug info reader (and unwinder) for\n\ | |
1511 | JIT compiled code. The file is loaded from " JIT_READER_DIR ",\n\ | |
1512 | relocated relative to the GDB executable if required.")); | |
6571a381 TT |
1513 | set_cmd_completer (c, filename_completer); |
1514 | ||
1515 | c = add_com ("jit-reader-unload", no_class, | |
1516 | jit_reader_unload_command, _("\ | |
784c47ee | 1517 | Unload the currently loaded JIT debug info reader.\n\ |
6571a381 | 1518 | Usage: jit-reader-unload\n\n\ |
784c47ee | 1519 | Do \"help jit-reader-load\" for info on loading debug info readers.")); |
6571a381 | 1520 | set_cmd_completer (c, noop_completer); |
784c47ee | 1521 | } |
4efc6507 | 1522 | } |