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82f5c14f MK |
1 | /* BSD user-level threads support. |
2 | ||
e2882c85 | 3 | Copyright (C) 2005-2018 Free Software Foundation, Inc. |
82f5c14f MK |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
82f5c14f MK |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
82f5c14f MK |
19 | |
20 | #include "defs.h" | |
21 | #include "gdbcore.h" | |
22 | #include "gdbthread.h" | |
23 | #include "inferior.h" | |
24 | #include "objfiles.h" | |
76727919 | 25 | #include "observable.h" |
82f5c14f | 26 | #include "regcache.h" |
5ebc08b0 | 27 | #include "solib.h" |
82f5c14f MK |
28 | #include "solist.h" |
29 | #include "symfile.h" | |
30 | #include "target.h" | |
31 | ||
82f5c14f MK |
32 | #include "gdb_obstack.h" |
33 | ||
34 | #include "bsd-uthread.h" | |
35 | ||
d9f719f1 PA |
36 | static const target_info bsd_uthread_target_info = { |
37 | "bsd-uthreads", | |
38 | N_("BSD user-level threads"), | |
39 | N_("BSD user-level threads") | |
40 | }; | |
41 | ||
f6ac5f3d PA |
42 | struct bsd_uthread_target final : public target_ops |
43 | { | |
44 | bsd_uthread_target () | |
45 | { to_stratum = thread_stratum; } | |
46 | ||
d9f719f1 PA |
47 | const target_info &info () const override |
48 | { return bsd_uthread_target_info; } | |
f6ac5f3d PA |
49 | |
50 | void close () override; | |
51 | ||
52 | void mourn_inferior () override; | |
53 | ||
54 | void fetch_registers (struct regcache *, int) override; | |
55 | void store_registers (struct regcache *, int) override; | |
56 | ||
57 | ptid_t wait (ptid_t, struct target_waitstatus *, int) override; | |
58 | void resume (ptid_t, int, enum gdb_signal) override; | |
59 | ||
57810aa7 | 60 | bool thread_alive (ptid_t ptid) override; |
f6ac5f3d PA |
61 | |
62 | void update_thread_list () override; | |
63 | ||
64 | const char *extra_thread_info (struct thread_info *) override; | |
65 | ||
66 | const char *pid_to_str (ptid_t) override; | |
67 | }; | |
68 | ||
69 | static bsd_uthread_target bsd_uthread_ops; | |
82f5c14f MK |
70 | \f |
71 | ||
72 | /* Architecture-specific operations. */ | |
73 | ||
74 | /* Per-architecture data key. */ | |
75 | static struct gdbarch_data *bsd_uthread_data; | |
76 | ||
77 | struct bsd_uthread_ops | |
78 | { | |
79 | /* Supply registers for an inactive thread to a register cache. */ | |
80 | void (*supply_uthread)(struct regcache *, int, CORE_ADDR); | |
81 | ||
82 | /* Collect registers for an inactive thread from a register cache. */ | |
83 | void (*collect_uthread)(const struct regcache *, int, CORE_ADDR); | |
84 | }; | |
85 | ||
86 | static void * | |
87 | bsd_uthread_init (struct obstack *obstack) | |
88 | { | |
89 | struct bsd_uthread_ops *ops; | |
90 | ||
91 | ops = OBSTACK_ZALLOC (obstack, struct bsd_uthread_ops); | |
92 | return ops; | |
93 | } | |
94 | ||
95 | /* Set the function that supplies registers from an inactive thread | |
96 | for architecture GDBARCH to SUPPLY_UTHREAD. */ | |
97 | ||
98 | void | |
99 | bsd_uthread_set_supply_uthread (struct gdbarch *gdbarch, | |
100 | void (*supply_uthread) (struct regcache *, | |
101 | int, CORE_ADDR)) | |
102 | { | |
9a3c8263 SM |
103 | struct bsd_uthread_ops *ops |
104 | = (struct bsd_uthread_ops *) gdbarch_data (gdbarch, bsd_uthread_data); | |
105 | ||
82f5c14f MK |
106 | ops->supply_uthread = supply_uthread; |
107 | } | |
108 | ||
109 | /* Set the function that collects registers for an inactive thread for | |
110 | architecture GDBARCH to SUPPLY_UTHREAD. */ | |
111 | ||
112 | void | |
113 | bsd_uthread_set_collect_uthread (struct gdbarch *gdbarch, | |
114 | void (*collect_uthread) (const struct regcache *, | |
115 | int, CORE_ADDR)) | |
116 | { | |
9a3c8263 SM |
117 | struct bsd_uthread_ops *ops |
118 | = (struct bsd_uthread_ops *) gdbarch_data (gdbarch, bsd_uthread_data); | |
119 | ||
82f5c14f MK |
120 | ops->collect_uthread = collect_uthread; |
121 | } | |
122 | ||
123 | /* Magic number to help recognize a valid thread structure. */ | |
124 | #define BSD_UTHREAD_PTHREAD_MAGIC 0xd09ba115 | |
125 | ||
126 | /* Check whether the thread structure at ADDR is valid. */ | |
127 | ||
128 | static void | |
129 | bsd_uthread_check_magic (CORE_ADDR addr) | |
130 | { | |
f5656ead | 131 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
e17a4113 | 132 | ULONGEST magic = read_memory_unsigned_integer (addr, 4, byte_order); |
82f5c14f MK |
133 | |
134 | if (magic != BSD_UTHREAD_PTHREAD_MAGIC) | |
8a3fe4f8 | 135 | error (_("Bad magic")); |
82f5c14f MK |
136 | } |
137 | ||
138 | /* Thread states. */ | |
139 | #define BSD_UTHREAD_PS_RUNNING 0 | |
140 | #define BSD_UTHREAD_PS_DEAD 18 | |
141 | ||
b021a221 | 142 | /* Address of the pointer to the thread structure for the running |
82f5c14f MK |
143 | thread. */ |
144 | static CORE_ADDR bsd_uthread_thread_run_addr; | |
145 | ||
146 | /* Address of the list of all threads. */ | |
147 | static CORE_ADDR bsd_uthread_thread_list_addr; | |
148 | ||
149 | /* Offsets of various "interesting" bits in the thread structure. */ | |
150 | static int bsd_uthread_thread_state_offset = -1; | |
151 | static int bsd_uthread_thread_next_offset = -1; | |
152 | static int bsd_uthread_thread_ctx_offset; | |
153 | ||
154 | /* Name of shared threads library. */ | |
155 | static const char *bsd_uthread_solib_name; | |
156 | ||
157 | /* Non-zero if the thread startum implemented by this module is active. */ | |
158 | static int bsd_uthread_active; | |
159 | ||
160 | static CORE_ADDR | |
161 | bsd_uthread_lookup_address (const char *name, struct objfile *objfile) | |
162 | { | |
3b7344d5 | 163 | struct bound_minimal_symbol sym; |
82f5c14f MK |
164 | |
165 | sym = lookup_minimal_symbol (name, NULL, objfile); | |
3b7344d5 | 166 | if (sym.minsym) |
77e371c0 | 167 | return BMSYMBOL_VALUE_ADDRESS (sym); |
82f5c14f MK |
168 | |
169 | return 0; | |
170 | } | |
171 | ||
172 | static int | |
173 | bsd_uthread_lookup_offset (const char *name, struct objfile *objfile) | |
174 | { | |
f5656ead | 175 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
82f5c14f MK |
176 | CORE_ADDR addr; |
177 | ||
178 | addr = bsd_uthread_lookup_address (name, objfile); | |
179 | if (addr == 0) | |
180 | return 0; | |
181 | ||
e17a4113 | 182 | return read_memory_unsigned_integer (addr, 4, byte_order); |
82f5c14f MK |
183 | } |
184 | ||
ff7da468 UW |
185 | static CORE_ADDR |
186 | bsd_uthread_read_memory_address (CORE_ADDR addr) | |
187 | { | |
f5656ead | 188 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
ff7da468 UW |
189 | return read_memory_typed_address (addr, ptr_type); |
190 | } | |
191 | ||
82f5c14f MK |
192 | /* If OBJFILE contains the symbols corresponding to one of the |
193 | supported user-level threads libraries, activate the thread stratum | |
194 | implemented by this module. */ | |
195 | ||
196 | static int | |
197 | bsd_uthread_activate (struct objfile *objfile) | |
198 | { | |
f5656ead | 199 | struct gdbarch *gdbarch = target_gdbarch (); |
9a3c8263 SM |
200 | struct bsd_uthread_ops *ops |
201 | = (struct bsd_uthread_ops *) gdbarch_data (gdbarch, bsd_uthread_data); | |
82f5c14f MK |
202 | |
203 | /* Skip if the thread stratum has already been activated. */ | |
204 | if (bsd_uthread_active) | |
205 | return 0; | |
206 | ||
207 | /* There's no point in enabling this module if no | |
208 | architecture-specific operations are provided. */ | |
209 | if (!ops->supply_uthread) | |
210 | return 0; | |
211 | ||
212 | bsd_uthread_thread_run_addr = | |
213 | bsd_uthread_lookup_address ("_thread_run", objfile); | |
214 | if (bsd_uthread_thread_run_addr == 0) | |
215 | return 0; | |
216 | ||
217 | bsd_uthread_thread_list_addr = | |
218 | bsd_uthread_lookup_address ("_thread_list", objfile); | |
219 | if (bsd_uthread_thread_list_addr == 0) | |
220 | return 0; | |
221 | ||
222 | bsd_uthread_thread_state_offset = | |
223 | bsd_uthread_lookup_offset ("_thread_state_offset", objfile); | |
224 | if (bsd_uthread_thread_state_offset == 0) | |
225 | return 0; | |
226 | ||
227 | bsd_uthread_thread_next_offset = | |
228 | bsd_uthread_lookup_offset ("_thread_next_offset", objfile); | |
229 | if (bsd_uthread_thread_next_offset == 0) | |
230 | return 0; | |
231 | ||
232 | bsd_uthread_thread_ctx_offset = | |
233 | bsd_uthread_lookup_offset ("_thread_ctx_offset", objfile); | |
234 | ||
f6ac5f3d | 235 | push_target (&bsd_uthread_ops); |
82f5c14f MK |
236 | bsd_uthread_active = 1; |
237 | return 1; | |
238 | } | |
239 | ||
39540081 | 240 | /* Cleanup due to deactivation. */ |
82f5c14f | 241 | |
f6ac5f3d PA |
242 | void |
243 | bsd_uthread_target::close () | |
82f5c14f | 244 | { |
82f5c14f | 245 | bsd_uthread_active = 0; |
82f5c14f MK |
246 | bsd_uthread_thread_run_addr = 0; |
247 | bsd_uthread_thread_list_addr = 0; | |
248 | bsd_uthread_thread_state_offset = 0; | |
249 | bsd_uthread_thread_next_offset = 0; | |
250 | bsd_uthread_thread_ctx_offset = 0; | |
251 | bsd_uthread_solib_name = NULL; | |
252 | } | |
253 | ||
39540081 PA |
254 | /* Deactivate the thread stratum implemented by this module. */ |
255 | ||
256 | static void | |
257 | bsd_uthread_deactivate (void) | |
258 | { | |
259 | /* Skip if the thread stratum has already been deactivated. */ | |
260 | if (!bsd_uthread_active) | |
261 | return; | |
262 | ||
f6ac5f3d | 263 | unpush_target (&bsd_uthread_ops); |
39540081 PA |
264 | } |
265 | ||
63807e1d | 266 | static void |
82f5c14f MK |
267 | bsd_uthread_inferior_created (struct target_ops *ops, int from_tty) |
268 | { | |
269 | bsd_uthread_activate (NULL); | |
270 | } | |
271 | ||
272 | /* Likely candidates for the threads library. */ | |
273 | static const char *bsd_uthread_solib_names[] = | |
274 | { | |
275 | "/usr/lib/libc_r.so", /* FreeBSD */ | |
276 | "/usr/lib/libpthread.so", /* OpenBSD */ | |
277 | NULL | |
278 | }; | |
279 | ||
63807e1d | 280 | static void |
82f5c14f MK |
281 | bsd_uthread_solib_loaded (struct so_list *so) |
282 | { | |
283 | const char **names = bsd_uthread_solib_names; | |
284 | ||
285 | for (names = bsd_uthread_solib_names; *names; names++) | |
286 | { | |
61012eef | 287 | if (startswith (so->so_original_name, *names)) |
82f5c14f | 288 | { |
048d532d | 289 | solib_read_symbols (so, 0); |
82f5c14f MK |
290 | |
291 | if (bsd_uthread_activate (so->objfile)) | |
292 | { | |
39540081 | 293 | bsd_uthread_solib_name = so->so_original_name; |
82f5c14f MK |
294 | return; |
295 | } | |
296 | } | |
297 | } | |
298 | } | |
299 | ||
63807e1d | 300 | static void |
82f5c14f MK |
301 | bsd_uthread_solib_unloaded (struct so_list *so) |
302 | { | |
303 | if (!bsd_uthread_solib_name) | |
304 | return; | |
305 | ||
306 | if (strcmp (so->so_original_name, bsd_uthread_solib_name) == 0) | |
307 | bsd_uthread_deactivate (); | |
308 | } | |
309 | ||
f6ac5f3d PA |
310 | void |
311 | bsd_uthread_target::mourn_inferior () | |
82f5c14f | 312 | { |
d6ca69cd | 313 | beneath ()->mourn_inferior (); |
82f5c14f MK |
314 | bsd_uthread_deactivate (); |
315 | } | |
316 | ||
f6ac5f3d PA |
317 | void |
318 | bsd_uthread_target::fetch_registers (struct regcache *regcache, int regnum) | |
82f5c14f | 319 | { |
ac7936df | 320 | struct gdbarch *gdbarch = regcache->arch (); |
9a3c8263 SM |
321 | struct bsd_uthread_ops *uthread_ops |
322 | = (struct bsd_uthread_ops *) gdbarch_data (gdbarch, bsd_uthread_data); | |
222312d3 | 323 | ptid_t ptid = regcache->ptid (); |
317cd492 | 324 | CORE_ADDR addr = ptid_get_tid (ptid); |
82f5c14f | 325 | CORE_ADDR active_addr; |
2989a365 | 326 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
317cd492 SM |
327 | |
328 | /* We are doing operations (e.g. reading memory) that rely on | |
329 | inferior_ptid. */ | |
330 | inferior_ptid = ptid; | |
82f5c14f MK |
331 | |
332 | /* Always fetch the appropriate registers from the layer beneath. */ | |
d6ca69cd | 333 | beneath ()->fetch_registers (regcache, regnum); |
82f5c14f MK |
334 | |
335 | /* FIXME: That might have gotten us more than we asked for. Make | |
336 | sure we overwrite all relevant registers with values from the | |
337 | thread structure. This can go once we fix the underlying target. */ | |
338 | regnum = -1; | |
339 | ||
ff7da468 | 340 | active_addr = bsd_uthread_read_memory_address (bsd_uthread_thread_run_addr); |
82f5c14f MK |
341 | if (addr != 0 && addr != active_addr) |
342 | { | |
343 | bsd_uthread_check_magic (addr); | |
28439f5e PA |
344 | uthread_ops->supply_uthread (regcache, regnum, |
345 | addr + bsd_uthread_thread_ctx_offset); | |
82f5c14f MK |
346 | } |
347 | } | |
348 | ||
f6ac5f3d PA |
349 | void |
350 | bsd_uthread_target::store_registers (struct regcache *regcache, int regnum) | |
82f5c14f | 351 | { |
ac7936df | 352 | struct gdbarch *gdbarch = regcache->arch (); |
9a3c8263 SM |
353 | struct bsd_uthread_ops *uthread_ops |
354 | = (struct bsd_uthread_ops *) gdbarch_data (gdbarch, bsd_uthread_data); | |
222312d3 | 355 | ptid_t ptid = regcache->ptid (); |
317cd492 | 356 | CORE_ADDR addr = ptid_get_tid (ptid); |
82f5c14f | 357 | CORE_ADDR active_addr; |
2989a365 | 358 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
317cd492 SM |
359 | |
360 | /* We are doing operations (e.g. reading memory) that rely on | |
361 | inferior_ptid. */ | |
362 | inferior_ptid = ptid; | |
82f5c14f | 363 | |
ff7da468 | 364 | active_addr = bsd_uthread_read_memory_address (bsd_uthread_thread_run_addr); |
82f5c14f MK |
365 | if (addr != 0 && addr != active_addr) |
366 | { | |
367 | bsd_uthread_check_magic (addr); | |
28439f5e PA |
368 | uthread_ops->collect_uthread (regcache, regnum, |
369 | addr + bsd_uthread_thread_ctx_offset); | |
82f5c14f MK |
370 | } |
371 | else | |
372 | { | |
373 | /* Updating the thread that is currently running; pass the | |
374 | request to the layer beneath. */ | |
d6ca69cd | 375 | beneath ()->store_registers (regcache, regnum); |
82f5c14f MK |
376 | } |
377 | } | |
378 | ||
f6ac5f3d PA |
379 | ptid_t |
380 | bsd_uthread_target::wait (ptid_t ptid, struct target_waitstatus *status, | |
381 | int options) | |
82f5c14f | 382 | { |
f5656ead | 383 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
82f5c14f MK |
384 | CORE_ADDR addr; |
385 | ||
386 | /* Pass the request to the layer beneath. */ | |
d6ca69cd | 387 | ptid = beneath ()->wait (ptid, status, options); |
82f5c14f | 388 | |
a4e7b2e7 MK |
389 | /* If the process is no longer alive, there's no point in figuring |
390 | out the thread ID. It will fail anyway. */ | |
391 | if (status->kind == TARGET_WAITKIND_SIGNALLED | |
392 | || status->kind == TARGET_WAITKIND_EXITED) | |
393 | return ptid; | |
394 | ||
82f5c14f MK |
395 | /* Fetch the corresponding thread ID, and augment the returned |
396 | process ID with it. */ | |
ff7da468 | 397 | addr = bsd_uthread_read_memory_address (bsd_uthread_thread_run_addr); |
82f5c14f MK |
398 | if (addr != 0) |
399 | { | |
df80278b | 400 | gdb_byte buf[4]; |
82f5c14f MK |
401 | |
402 | /* FIXME: For executables linked statically with the threads | |
403 | library, we end up here before the program has actually been | |
404 | executed. In that case ADDR will be garbage since it has | |
405 | been read from the wrong virtual memory image. */ | |
406 | if (target_read_memory (addr, buf, 4) == 0) | |
407 | { | |
e17a4113 | 408 | ULONGEST magic = extract_unsigned_integer (buf, 4, byte_order); |
82f5c14f MK |
409 | if (magic == BSD_UTHREAD_PTHREAD_MAGIC) |
410 | ptid = ptid_build (ptid_get_pid (ptid), 0, addr); | |
411 | } | |
412 | } | |
413 | ||
fb5e7258 PA |
414 | /* If INFERIOR_PTID doesn't have a tid member yet, and we now have a |
415 | ptid with tid set, then ptid is still the initial thread of | |
416 | the process. Notify GDB core about it. */ | |
417 | if (ptid_get_tid (inferior_ptid) == 0 | |
418 | && ptid_get_tid (ptid) != 0 && !in_thread_list (ptid)) | |
419 | thread_change_ptid (inferior_ptid, ptid); | |
420 | ||
421 | /* Don't let the core see a ptid without a corresponding thread. */ | |
422 | if (!in_thread_list (ptid) || is_exited (ptid)) | |
423 | add_thread (ptid); | |
82f5c14f MK |
424 | |
425 | return ptid; | |
426 | } | |
427 | ||
f6ac5f3d PA |
428 | void |
429 | bsd_uthread_target::resume (ptid_t ptid, int step, enum gdb_signal sig) | |
82f5c14f MK |
430 | { |
431 | /* Pass the request to the layer beneath. */ | |
d6ca69cd | 432 | beneath ()->resume (ptid, step, sig); |
82f5c14f MK |
433 | } |
434 | ||
57810aa7 | 435 | bool |
f6ac5f3d | 436 | bsd_uthread_target::thread_alive (ptid_t ptid) |
82f5c14f | 437 | { |
f5656ead | 438 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
8eaf5320 | 439 | CORE_ADDR addr = ptid_get_tid (ptid); |
82f5c14f MK |
440 | |
441 | if (addr != 0) | |
442 | { | |
443 | int offset = bsd_uthread_thread_state_offset; | |
444 | ULONGEST state; | |
445 | ||
446 | bsd_uthread_check_magic (addr); | |
447 | ||
e17a4113 | 448 | state = read_memory_unsigned_integer (addr + offset, 4, byte_order); |
82f5c14f | 449 | if (state == BSD_UTHREAD_PS_DEAD) |
57810aa7 | 450 | return false; |
82f5c14f MK |
451 | } |
452 | ||
d6ca69cd | 453 | return beneath ()->thread_alive (ptid); |
82f5c14f MK |
454 | } |
455 | ||
f6ac5f3d PA |
456 | void |
457 | bsd_uthread_target::update_thread_list () | |
82f5c14f MK |
458 | { |
459 | pid_t pid = ptid_get_pid (inferior_ptid); | |
460 | int offset = bsd_uthread_thread_next_offset; | |
461 | CORE_ADDR addr; | |
462 | ||
e8032dde PA |
463 | prune_threads (); |
464 | ||
ff7da468 | 465 | addr = bsd_uthread_read_memory_address (bsd_uthread_thread_list_addr); |
82f5c14f MK |
466 | while (addr != 0) |
467 | { | |
468 | ptid_t ptid = ptid_build (pid, 0, addr); | |
469 | ||
fb5e7258 | 470 | if (!in_thread_list (ptid) || is_exited (ptid)) |
757f359d PA |
471 | { |
472 | /* If INFERIOR_PTID doesn't have a tid member yet, then ptid | |
473 | is still the initial thread of the process. Notify GDB | |
474 | core about it. */ | |
475 | if (ptid_get_tid (inferior_ptid) == 0) | |
476 | thread_change_ptid (inferior_ptid, ptid); | |
477 | else | |
478 | add_thread (ptid); | |
479 | } | |
82f5c14f | 480 | |
ff7da468 | 481 | addr = bsd_uthread_read_memory_address (addr + offset); |
82f5c14f MK |
482 | } |
483 | } | |
484 | ||
485 | /* Possible states a thread can be in. */ | |
a121b7c1 | 486 | static const char *bsd_uthread_state[] = |
82f5c14f MK |
487 | { |
488 | "RUNNING", | |
489 | "SIGTHREAD", | |
490 | "MUTEX_WAIT", | |
491 | "COND_WAIT", | |
492 | "FDLR_WAIT", | |
493 | "FDLW_WAIT", | |
494 | "FDR_WAIT", | |
495 | "FDW_WAIT", | |
496 | "FILE_WAIT", | |
497 | "POLL_WAIT", | |
498 | "SELECT_WAIT", | |
499 | "SLEEP_WAIT", | |
500 | "WAIT_WAIT", | |
501 | "SIGSUSPEND", | |
502 | "SIGWAIT", | |
503 | "SPINBLOCK", | |
504 | "JOIN", | |
505 | "SUSPENDED", | |
506 | "DEAD", | |
507 | "DEADLOCK" | |
508 | }; | |
509 | ||
510 | /* Return a string describing th state of the thread specified by | |
511 | INFO. */ | |
512 | ||
f6ac5f3d PA |
513 | const char * |
514 | bsd_uthread_target::extra_thread_info (thread_info *info) | |
82f5c14f | 515 | { |
f5656ead | 516 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
82f5c14f MK |
517 | CORE_ADDR addr = ptid_get_tid (info->ptid); |
518 | ||
519 | if (addr != 0) | |
520 | { | |
521 | int offset = bsd_uthread_thread_state_offset; | |
522 | ULONGEST state; | |
523 | ||
e17a4113 | 524 | state = read_memory_unsigned_integer (addr + offset, 4, byte_order); |
82f5c14f MK |
525 | if (state < ARRAY_SIZE (bsd_uthread_state)) |
526 | return bsd_uthread_state[state]; | |
527 | } | |
528 | ||
529 | return NULL; | |
530 | } | |
531 | ||
f6ac5f3d PA |
532 | const char * |
533 | bsd_uthread_target::pid_to_str (ptid_t ptid) | |
82f5c14f MK |
534 | { |
535 | if (ptid_get_tid (ptid) != 0) | |
536 | { | |
537 | static char buf[64]; | |
82f5c14f | 538 | |
5fff8fc0 MK |
539 | xsnprintf (buf, sizeof buf, "process %d, thread 0x%lx", |
540 | ptid_get_pid (ptid), ptid_get_tid (ptid)); | |
82f5c14f MK |
541 | return buf; |
542 | } | |
543 | ||
544 | return normal_pid_to_str (ptid); | |
545 | } | |
546 | ||
82f5c14f MK |
547 | void |
548 | _initialize_bsd_uthread (void) | |
549 | { | |
82f5c14f MK |
550 | bsd_uthread_data = gdbarch_data_register_pre_init (bsd_uthread_init); |
551 | ||
76727919 TT |
552 | gdb::observers::inferior_created.attach (bsd_uthread_inferior_created); |
553 | gdb::observers::solib_loaded.attach (bsd_uthread_solib_loaded); | |
554 | gdb::observers::solib_unloaded.attach (bsd_uthread_solib_unloaded); | |
82f5c14f | 555 | } |