| 1 | /* Solaris threads debugging interface. |
| 2 | |
| 3 | Copyright (C) 1996-2020 Free Software Foundation, Inc. |
| 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 | /* This module implements a sort of half target that sits between the |
| 21 | machine-independent parts of GDB and the /proc interface (procfs.c) |
| 22 | to provide access to the Solaris user-mode thread implementation. |
| 23 | |
| 24 | Solaris threads are true user-mode threads, which are invoked via |
| 25 | the thr_* and pthread_* (native and POSIX respectively) interfaces. |
| 26 | These are mostly implemented in user-space, with all thread context |
| 27 | kept in various structures that live in the user's heap. These |
| 28 | should not be confused with lightweight processes (LWPs), which are |
| 29 | implemented by the kernel, and scheduled without explicit |
| 30 | intervention by the process. |
| 31 | |
| 32 | Just to confuse things a little, Solaris threads (both native and |
| 33 | POSIX) are actually implemented using LWPs. In general, there are |
| 34 | going to be more threads than LWPs. There is no fixed |
| 35 | correspondence between a thread and an LWP. When a thread wants to |
| 36 | run, it gets scheduled onto the first available LWP and can |
| 37 | therefore migrate from one LWP to another as time goes on. A |
| 38 | sleeping thread may not be associated with an LWP at all! |
| 39 | |
| 40 | To make it possible to mess with threads, Sun provides a library |
| 41 | called libthread_db.so.1 (not to be confused with |
| 42 | libthread_db.so.0, which doesn't have a published interface). This |
| 43 | interface has an upper part, which it provides, and a lower part |
| 44 | which we provide. The upper part consists of the td_* routines, |
| 45 | which allow us to find all the threads, query their state, etc... |
| 46 | The lower part consists of all of the ps_*, which are used by the |
| 47 | td_* routines to read/write memory, manipulate LWPs, lookup |
| 48 | symbols, etc... The ps_* routines actually do most of their work |
| 49 | by calling functions in procfs.c. */ |
| 50 | |
| 51 | #include "defs.h" |
| 52 | #include <thread.h> |
| 53 | #include <proc_service.h> |
| 54 | #include <thread_db.h> |
| 55 | #include "gdbthread.h" |
| 56 | #include "target.h" |
| 57 | #include "inferior.h" |
| 58 | #include <fcntl.h> |
| 59 | #include <sys/stat.h> |
| 60 | #include <dlfcn.h> |
| 61 | #include "gdbcmd.h" |
| 62 | #include "gdbcore.h" |
| 63 | #include "regcache.h" |
| 64 | #include "solib.h" |
| 65 | #include "symfile.h" |
| 66 | #include "observable.h" |
| 67 | #include "procfs.h" |
| 68 | #include "symtab.h" |
| 69 | #include "minsyms.h" |
| 70 | #include "objfiles.h" |
| 71 | |
| 72 | static const target_info thread_db_target_info = { |
| 73 | "solaris-threads", |
| 74 | N_("Solaris threads and pthread."), |
| 75 | N_("Solaris threads and pthread support.") |
| 76 | }; |
| 77 | |
| 78 | class sol_thread_target final : public target_ops |
| 79 | { |
| 80 | public: |
| 81 | const target_info &info () const override |
| 82 | { return thread_db_target_info; } |
| 83 | |
| 84 | strata stratum () const override { return thread_stratum; } |
| 85 | |
| 86 | void detach (inferior *, int) override; |
| 87 | ptid_t wait (ptid_t, struct target_waitstatus *, int) override; |
| 88 | void resume (ptid_t, int, enum gdb_signal) override; |
| 89 | void mourn_inferior () override; |
| 90 | std::string pid_to_str (ptid_t) override; |
| 91 | ptid_t get_ada_task_ptid (long lwp, long thread) override; |
| 92 | |
| 93 | void fetch_registers (struct regcache *, int) override; |
| 94 | void store_registers (struct regcache *, int) override; |
| 95 | |
| 96 | enum target_xfer_status xfer_partial (enum target_object object, |
| 97 | const char *annex, |
| 98 | gdb_byte *readbuf, |
| 99 | const gdb_byte *writebuf, |
| 100 | ULONGEST offset, ULONGEST len, |
| 101 | ULONGEST *xfered_len) override; |
| 102 | |
| 103 | bool thread_alive (ptid_t ptid) override; |
| 104 | void update_thread_list () override; |
| 105 | }; |
| 106 | |
| 107 | static sol_thread_target sol_thread_ops; |
| 108 | |
| 109 | /* Prototypes for supply_gregset etc. */ |
| 110 | #include "gregset.h" |
| 111 | |
| 112 | /* This struct is defined by us, but mainly used for the proc_service |
| 113 | interface. We don't have much use for it, except as a handy place |
| 114 | to get a real PID for memory accesses. */ |
| 115 | |
| 116 | struct ps_prochandle |
| 117 | { |
| 118 | ptid_t ptid; |
| 119 | }; |
| 120 | |
| 121 | struct string_map |
| 122 | { |
| 123 | int num; |
| 124 | const char *str; |
| 125 | }; |
| 126 | |
| 127 | static struct ps_prochandle main_ph; |
| 128 | static td_thragent_t *main_ta; |
| 129 | static int sol_thread_active = 0; |
| 130 | |
| 131 | /* Default definitions: These must be defined in tm.h if they are to |
| 132 | be shared with a process module such as procfs. */ |
| 133 | |
| 134 | /* Types of the libthread_db functions. */ |
| 135 | |
| 136 | typedef void (td_log_ftype)(const int on_off); |
| 137 | typedef td_err_e (td_ta_new_ftype)(const struct ps_prochandle *ph_p, |
| 138 | td_thragent_t **ta_pp); |
| 139 | typedef td_err_e (td_ta_delete_ftype)(td_thragent_t *ta_p); |
| 140 | typedef td_err_e (td_init_ftype)(void); |
| 141 | typedef td_err_e (td_ta_get_ph_ftype)(const td_thragent_t *ta_p, |
| 142 | struct ps_prochandle **ph_pp); |
| 143 | typedef td_err_e (td_ta_get_nthreads_ftype)(const td_thragent_t *ta_p, |
| 144 | int *nthread_p); |
| 145 | typedef td_err_e (td_ta_tsd_iter_ftype)(const td_thragent_t *ta_p, |
| 146 | td_key_iter_f *cb, void *cbdata_p); |
| 147 | typedef td_err_e (td_ta_thr_iter_ftype)(const td_thragent_t *ta_p, |
| 148 | td_thr_iter_f *cb, void *cbdata_p, |
| 149 | td_thr_state_e state, int ti_pri, |
| 150 | sigset_t *ti_sigmask_p, |
| 151 | unsigned ti_user_flags); |
| 152 | typedef td_err_e (td_thr_validate_ftype)(const td_thrhandle_t *th_p); |
| 153 | typedef td_err_e (td_thr_tsd_ftype)(const td_thrhandle_t * th_p, |
| 154 | const thread_key_t key, void **data_pp); |
| 155 | typedef td_err_e (td_thr_get_info_ftype)(const td_thrhandle_t *th_p, |
| 156 | td_thrinfo_t *ti_p); |
| 157 | typedef td_err_e (td_thr_getfpregs_ftype)(const td_thrhandle_t *th_p, |
| 158 | prfpregset_t *fpregset); |
| 159 | typedef td_err_e (td_thr_getxregsize_ftype)(const td_thrhandle_t *th_p, |
| 160 | int *xregsize); |
| 161 | typedef td_err_e (td_thr_getxregs_ftype)(const td_thrhandle_t *th_p, |
| 162 | const caddr_t xregset); |
| 163 | typedef td_err_e (td_thr_sigsetmask_ftype)(const td_thrhandle_t *th_p, |
| 164 | const sigset_t ti_sigmask); |
| 165 | typedef td_err_e (td_thr_setprio_ftype)(const td_thrhandle_t *th_p, |
| 166 | const int ti_pri); |
| 167 | typedef td_err_e (td_thr_setsigpending_ftype)(const td_thrhandle_t *th_p, |
| 168 | const uchar_t ti_pending_flag, |
| 169 | const sigset_t ti_pending); |
| 170 | typedef td_err_e (td_thr_setfpregs_ftype)(const td_thrhandle_t *th_p, |
| 171 | const prfpregset_t *fpregset); |
| 172 | typedef td_err_e (td_thr_setxregs_ftype)(const td_thrhandle_t *th_p, |
| 173 | const caddr_t xregset); |
| 174 | typedef td_err_e (td_ta_map_id2thr_ftype)(const td_thragent_t *ta_p, |
| 175 | thread_t tid, |
| 176 | td_thrhandle_t *th_p); |
| 177 | typedef td_err_e (td_ta_map_lwp2thr_ftype)(const td_thragent_t *ta_p, |
| 178 | lwpid_t lwpid, |
| 179 | td_thrhandle_t *th_p); |
| 180 | typedef td_err_e (td_thr_getgregs_ftype)(const td_thrhandle_t *th_p, |
| 181 | prgregset_t regset); |
| 182 | typedef td_err_e (td_thr_setgregs_ftype)(const td_thrhandle_t *th_p, |
| 183 | const prgregset_t regset); |
| 184 | |
| 185 | /* Pointers to routines from libthread_db resolved by dlopen(). */ |
| 186 | |
| 187 | static td_log_ftype *p_td_log; |
| 188 | static td_ta_new_ftype *p_td_ta_new; |
| 189 | static td_ta_delete_ftype *p_td_ta_delete; |
| 190 | static td_init_ftype *p_td_init; |
| 191 | static td_ta_get_ph_ftype *p_td_ta_get_ph; |
| 192 | static td_ta_get_nthreads_ftype *p_td_ta_get_nthreads; |
| 193 | static td_ta_tsd_iter_ftype *p_td_ta_tsd_iter; |
| 194 | static td_ta_thr_iter_ftype *p_td_ta_thr_iter; |
| 195 | static td_thr_validate_ftype *p_td_thr_validate; |
| 196 | static td_thr_tsd_ftype *p_td_thr_tsd; |
| 197 | static td_thr_get_info_ftype *p_td_thr_get_info; |
| 198 | static td_thr_getfpregs_ftype *p_td_thr_getfpregs; |
| 199 | static td_thr_getxregsize_ftype *p_td_thr_getxregsize; |
| 200 | static td_thr_getxregs_ftype *p_td_thr_getxregs; |
| 201 | static td_thr_sigsetmask_ftype *p_td_thr_sigsetmask; |
| 202 | static td_thr_setprio_ftype *p_td_thr_setprio; |
| 203 | static td_thr_setsigpending_ftype *p_td_thr_setsigpending; |
| 204 | static td_thr_setfpregs_ftype *p_td_thr_setfpregs; |
| 205 | static td_thr_setxregs_ftype *p_td_thr_setxregs; |
| 206 | static td_ta_map_id2thr_ftype *p_td_ta_map_id2thr; |
| 207 | static td_ta_map_lwp2thr_ftype *p_td_ta_map_lwp2thr; |
| 208 | static td_thr_getgregs_ftype *p_td_thr_getgregs; |
| 209 | static td_thr_setgregs_ftype *p_td_thr_setgregs; |
| 210 | \f |
| 211 | |
| 212 | /* Return the libthread_db error string associated with ERRCODE. If |
| 213 | ERRCODE is unknown, return an appropriate message. */ |
| 214 | |
| 215 | static const char * |
| 216 | td_err_string (td_err_e errcode) |
| 217 | { |
| 218 | static struct string_map td_err_table[] = |
| 219 | { |
| 220 | { TD_OK, "generic \"call succeeded\"" }, |
| 221 | { TD_ERR, "generic error." }, |
| 222 | { TD_NOTHR, "no thread can be found to satisfy query" }, |
| 223 | { TD_NOSV, "no synch. variable can be found to satisfy query" }, |
| 224 | { TD_NOLWP, "no lwp can be found to satisfy query" }, |
| 225 | { TD_BADPH, "invalid process handle" }, |
| 226 | { TD_BADTH, "invalid thread handle" }, |
| 227 | { TD_BADSH, "invalid synchronization handle" }, |
| 228 | { TD_BADTA, "invalid thread agent" }, |
| 229 | { TD_BADKEY, "invalid key" }, |
| 230 | { TD_NOMSG, "td_thr_event_getmsg() called when there was no message" }, |
| 231 | { TD_NOFPREGS, "FPU register set not available for given thread" }, |
| 232 | { TD_NOLIBTHREAD, "application not linked with libthread" }, |
| 233 | { TD_NOEVENT, "requested event is not supported" }, |
| 234 | { TD_NOCAPAB, "capability not available" }, |
| 235 | { TD_DBERR, "Debugger service failed" }, |
| 236 | { TD_NOAPLIC, "Operation not applicable to" }, |
| 237 | { TD_NOTSD, "No thread specific data for this thread" }, |
| 238 | { TD_MALLOC, "Malloc failed" }, |
| 239 | { TD_PARTIALREG, "Only part of register set was written/read" }, |
| 240 | { TD_NOXREGS, "X register set not available for given thread" } |
| 241 | }; |
| 242 | const int td_err_size = sizeof td_err_table / sizeof (struct string_map); |
| 243 | int i; |
| 244 | static char buf[50]; |
| 245 | |
| 246 | for (i = 0; i < td_err_size; i++) |
| 247 | if (td_err_table[i].num == errcode) |
| 248 | return td_err_table[i].str; |
| 249 | |
| 250 | xsnprintf (buf, sizeof (buf), "Unknown libthread_db error code: %d", |
| 251 | errcode); |
| 252 | |
| 253 | return buf; |
| 254 | } |
| 255 | |
| 256 | /* Return the libthread_db state string associated with STATECODE. |
| 257 | If STATECODE is unknown, return an appropriate message. */ |
| 258 | |
| 259 | static const char * |
| 260 | td_state_string (td_thr_state_e statecode) |
| 261 | { |
| 262 | static struct string_map td_thr_state_table[] = |
| 263 | { |
| 264 | { TD_THR_ANY_STATE, "any state" }, |
| 265 | { TD_THR_UNKNOWN, "unknown" }, |
| 266 | { TD_THR_STOPPED, "stopped" }, |
| 267 | { TD_THR_RUN, "run" }, |
| 268 | { TD_THR_ACTIVE, "active" }, |
| 269 | { TD_THR_ZOMBIE, "zombie" }, |
| 270 | { TD_THR_SLEEP, "sleep" }, |
| 271 | { TD_THR_STOPPED_ASLEEP, "stopped asleep" } |
| 272 | }; |
| 273 | const int td_thr_state_table_size = |
| 274 | sizeof td_thr_state_table / sizeof (struct string_map); |
| 275 | int i; |
| 276 | static char buf[50]; |
| 277 | |
| 278 | for (i = 0; i < td_thr_state_table_size; i++) |
| 279 | if (td_thr_state_table[i].num == statecode) |
| 280 | return td_thr_state_table[i].str; |
| 281 | |
| 282 | xsnprintf (buf, sizeof (buf), "Unknown libthread_db state code: %d", |
| 283 | statecode); |
| 284 | |
| 285 | return buf; |
| 286 | } |
| 287 | \f |
| 288 | |
| 289 | /* Convert a POSIX or Solaris thread ID into a LWP ID. If THREAD_ID |
| 290 | doesn't exist, that's an error. If it's an inactive thread, return |
| 291 | DEFAULT_LWP. |
| 292 | |
| 293 | NOTE: This function probably shouldn't call error(). */ |
| 294 | |
| 295 | static ptid_t |
| 296 | thread_to_lwp (ptid_t thread_id, int default_lwp) |
| 297 | { |
| 298 | td_thrinfo_t ti; |
| 299 | td_thrhandle_t th; |
| 300 | td_err_e val; |
| 301 | |
| 302 | if (thread_id.lwp_p ()) |
| 303 | return thread_id; /* It's already an LWP ID. */ |
| 304 | |
| 305 | /* It's a thread. Convert to LWP. */ |
| 306 | |
| 307 | val = p_td_ta_map_id2thr (main_ta, thread_id.tid (), &th); |
| 308 | if (val == TD_NOTHR) |
| 309 | return ptid_t (-1); /* Thread must have terminated. */ |
| 310 | else if (val != TD_OK) |
| 311 | error (_("thread_to_lwp: td_ta_map_id2thr %s"), td_err_string (val)); |
| 312 | |
| 313 | val = p_td_thr_get_info (&th, &ti); |
| 314 | if (val == TD_NOTHR) |
| 315 | return ptid_t (-1); /* Thread must have terminated. */ |
| 316 | else if (val != TD_OK) |
| 317 | error (_("thread_to_lwp: td_thr_get_info: %s"), td_err_string (val)); |
| 318 | |
| 319 | if (ti.ti_state != TD_THR_ACTIVE) |
| 320 | { |
| 321 | if (default_lwp != -1) |
| 322 | return ptid_t (default_lwp); |
| 323 | error (_("thread_to_lwp: thread state not active: %s"), |
| 324 | td_state_string (ti.ti_state)); |
| 325 | } |
| 326 | |
| 327 | return ptid_t (thread_id.pid (), ti.ti_lid, 0); |
| 328 | } |
| 329 | |
| 330 | /* Convert an LWP ID into a POSIX or Solaris thread ID. If LWP_ID |
| 331 | doesn't exists, that's an error. |
| 332 | |
| 333 | NOTE: This function probably shouldn't call error(). */ |
| 334 | |
| 335 | static ptid_t |
| 336 | lwp_to_thread (ptid_t lwp) |
| 337 | { |
| 338 | td_thrinfo_t ti; |
| 339 | td_thrhandle_t th; |
| 340 | td_err_e val; |
| 341 | |
| 342 | if (lwp.tid_p ()) |
| 343 | return lwp; /* It's already a thread ID. */ |
| 344 | |
| 345 | /* It's an LWP. Convert it to a thread ID. */ |
| 346 | |
| 347 | if (!target_thread_alive (lwp)) |
| 348 | return ptid_t (-1); /* Must be a defunct LPW. */ |
| 349 | |
| 350 | val = p_td_ta_map_lwp2thr (main_ta, lwp.lwp (), &th); |
| 351 | if (val == TD_NOTHR) |
| 352 | return ptid_t (-1); /* Thread must have terminated. */ |
| 353 | else if (val != TD_OK) |
| 354 | error (_("lwp_to_thread: td_ta_map_lwp2thr: %s."), td_err_string (val)); |
| 355 | |
| 356 | val = p_td_thr_validate (&th); |
| 357 | if (val == TD_NOTHR) |
| 358 | return lwp; /* Unknown to libthread; just return LPW, */ |
| 359 | else if (val != TD_OK) |
| 360 | error (_("lwp_to_thread: td_thr_validate: %s."), td_err_string (val)); |
| 361 | |
| 362 | val = p_td_thr_get_info (&th, &ti); |
| 363 | if (val == TD_NOTHR) |
| 364 | return ptid_t (-1); /* Thread must have terminated. */ |
| 365 | else if (val != TD_OK) |
| 366 | error (_("lwp_to_thread: td_thr_get_info: %s."), td_err_string (val)); |
| 367 | |
| 368 | return ptid_t (lwp.pid (), 0 , ti.ti_tid); |
| 369 | } |
| 370 | \f |
| 371 | |
| 372 | /* Most target vector functions from here on actually just pass |
| 373 | through to the layer beneath, as they don't need to do anything |
| 374 | specific for threads. */ |
| 375 | |
| 376 | /* Take a program previously attached to and detaches it. The program |
| 377 | resumes execution and will no longer stop on signals, etc. We'd |
| 378 | better not have left any breakpoints in the program or it'll die |
| 379 | when it hits one. For this to work, it may be necessary for the |
| 380 | process to have been previously attached. It *might* work if the |
| 381 | program was started via the normal ptrace (PTRACE_TRACEME). */ |
| 382 | |
| 383 | void |
| 384 | sol_thread_target::detach (inferior *inf, int from_tty) |
| 385 | { |
| 386 | target_ops *beneath = this->beneath (); |
| 387 | |
| 388 | sol_thread_active = 0; |
| 389 | inferior_ptid = ptid_t (main_ph.ptid.pid ()); |
| 390 | unpush_target (this); |
| 391 | beneath->detach (inf, from_tty); |
| 392 | } |
| 393 | |
| 394 | /* Resume execution of process PTID. If STEP is nonzero, then just |
| 395 | single step it. If SIGNAL is nonzero, restart it with that signal |
| 396 | activated. We may have to convert PTID from a thread ID to an LWP |
| 397 | ID for procfs. */ |
| 398 | |
| 399 | void |
| 400 | sol_thread_target::resume (ptid_t ptid, int step, enum gdb_signal signo) |
| 401 | { |
| 402 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
| 403 | |
| 404 | inferior_ptid = thread_to_lwp (inferior_ptid, main_ph.ptid.pid ()); |
| 405 | if (inferior_ptid.pid () == -1) |
| 406 | inferior_ptid = procfs_first_available (); |
| 407 | |
| 408 | if (ptid.pid () != -1) |
| 409 | { |
| 410 | ptid_t save_ptid = ptid; |
| 411 | |
| 412 | ptid = thread_to_lwp (ptid, -2); |
| 413 | if (ptid.pid () == -2) /* Inactive thread. */ |
| 414 | error (_("This version of Solaris can't start inactive threads.")); |
| 415 | if (info_verbose && ptid.pid () == -1) |
| 416 | warning (_("Specified thread %ld seems to have terminated"), |
| 417 | save_ptid.tid ()); |
| 418 | } |
| 419 | |
| 420 | beneath ()->resume (ptid, step, signo); |
| 421 | } |
| 422 | |
| 423 | /* Wait for any threads to stop. We may have to convert PTID from a |
| 424 | thread ID to an LWP ID, and vice versa on the way out. */ |
| 425 | |
| 426 | ptid_t |
| 427 | sol_thread_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus, |
| 428 | int options) |
| 429 | { |
| 430 | ptid_t rtnval; |
| 431 | ptid_t save_ptid; |
| 432 | |
| 433 | save_ptid = inferior_ptid; |
| 434 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
| 435 | |
| 436 | inferior_ptid = thread_to_lwp (inferior_ptid, main_ph.ptid.pid ()); |
| 437 | if (inferior_ptid.pid () == -1) |
| 438 | inferior_ptid = procfs_first_available (); |
| 439 | |
| 440 | if (ptid.pid () != -1) |
| 441 | { |
| 442 | ptid_t ptid_for_warning = ptid; |
| 443 | |
| 444 | ptid = thread_to_lwp (ptid, -2); |
| 445 | if (ptid.pid () == -2) /* Inactive thread. */ |
| 446 | error (_("This version of Solaris can't start inactive threads.")); |
| 447 | if (info_verbose && ptid.pid () == -1) |
| 448 | warning (_("Specified thread %ld seems to have terminated"), |
| 449 | ptid_for_warning.tid ()); |
| 450 | } |
| 451 | |
| 452 | rtnval = beneath ()->wait (ptid, ourstatus, options); |
| 453 | |
| 454 | if (ourstatus->kind != TARGET_WAITKIND_EXITED) |
| 455 | { |
| 456 | /* Map the LWP of interest back to the appropriate thread ID. */ |
| 457 | rtnval = lwp_to_thread (rtnval); |
| 458 | if (rtnval.pid () == -1) |
| 459 | rtnval = save_ptid; |
| 460 | |
| 461 | /* See if we have a new thread. */ |
| 462 | if (rtnval.tid_p () && rtnval != save_ptid) |
| 463 | { |
| 464 | thread_info *thr = find_thread_ptid (current_inferior (), rtnval); |
| 465 | if (thr == NULL || thr->state == THREAD_EXITED) |
| 466 | { |
| 467 | process_stratum_target *proc_target |
| 468 | = current_inferior ()->process_target (); |
| 469 | add_thread (proc_target, rtnval); |
| 470 | } |
| 471 | } |
| 472 | } |
| 473 | |
| 474 | /* During process initialization, we may get here without the thread |
| 475 | package being initialized, since that can only happen after we've |
| 476 | found the shared libs. */ |
| 477 | |
| 478 | return rtnval; |
| 479 | } |
| 480 | |
| 481 | void |
| 482 | sol_thread_target::fetch_registers (struct regcache *regcache, int regnum) |
| 483 | { |
| 484 | thread_t thread; |
| 485 | td_thrhandle_t thandle; |
| 486 | td_err_e val; |
| 487 | prgregset_t gregset; |
| 488 | prfpregset_t fpregset; |
| 489 | gdb_gregset_t *gregset_p = &gregset; |
| 490 | gdb_fpregset_t *fpregset_p = &fpregset; |
| 491 | ptid_t ptid = regcache->ptid (); |
| 492 | |
| 493 | if (!ptid.tid_p ()) |
| 494 | { |
| 495 | /* It's an LWP; pass the request on to the layer beneath. */ |
| 496 | beneath ()->fetch_registers (regcache, regnum); |
| 497 | return; |
| 498 | } |
| 499 | |
| 500 | /* Solaris thread: convert PTID into a td_thrhandle_t. */ |
| 501 | thread = ptid.tid (); |
| 502 | if (thread == 0) |
| 503 | error (_("sol_thread_fetch_registers: thread == 0")); |
| 504 | |
| 505 | val = p_td_ta_map_id2thr (main_ta, thread, &thandle); |
| 506 | if (val != TD_OK) |
| 507 | error (_("sol_thread_fetch_registers: td_ta_map_id2thr: %s"), |
| 508 | td_err_string (val)); |
| 509 | |
| 510 | /* Get the general-purpose registers. */ |
| 511 | |
| 512 | val = p_td_thr_getgregs (&thandle, gregset); |
| 513 | if (val != TD_OK && val != TD_PARTIALREG) |
| 514 | error (_("sol_thread_fetch_registers: td_thr_getgregs %s"), |
| 515 | td_err_string (val)); |
| 516 | |
| 517 | /* For SPARC, TD_PARTIALREG means that only %i0...%i7, %l0..%l7, %pc |
| 518 | and %sp are saved (by a thread context switch). */ |
| 519 | |
| 520 | /* And, now the floating-point registers. */ |
| 521 | |
| 522 | val = p_td_thr_getfpregs (&thandle, &fpregset); |
| 523 | if (val != TD_OK && val != TD_NOFPREGS) |
| 524 | error (_("sol_thread_fetch_registers: td_thr_getfpregs %s"), |
| 525 | td_err_string (val)); |
| 526 | |
| 527 | /* Note that we must call supply_gregset and supply_fpregset *after* |
| 528 | calling the td routines because the td routines call ps_lget* |
| 529 | which affect the values stored in the registers array. */ |
| 530 | |
| 531 | supply_gregset (regcache, (const gdb_gregset_t *) gregset_p); |
| 532 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregset_p); |
| 533 | } |
| 534 | |
| 535 | void |
| 536 | sol_thread_target::store_registers (struct regcache *regcache, int regnum) |
| 537 | { |
| 538 | thread_t thread; |
| 539 | td_thrhandle_t thandle; |
| 540 | td_err_e val; |
| 541 | prgregset_t gregset; |
| 542 | prfpregset_t fpregset; |
| 543 | ptid_t ptid = regcache->ptid (); |
| 544 | |
| 545 | if (!ptid.tid_p ()) |
| 546 | { |
| 547 | /* It's an LWP; pass the request on to the layer beneath. */ |
| 548 | beneath ()->store_registers (regcache, regnum); |
| 549 | return; |
| 550 | } |
| 551 | |
| 552 | /* Solaris thread: convert PTID into a td_thrhandle_t. */ |
| 553 | thread = ptid.tid (); |
| 554 | |
| 555 | val = p_td_ta_map_id2thr (main_ta, thread, &thandle); |
| 556 | if (val != TD_OK) |
| 557 | error (_("sol_thread_store_registers: td_ta_map_id2thr %s"), |
| 558 | td_err_string (val)); |
| 559 | |
| 560 | if (regnum != -1) |
| 561 | { |
| 562 | val = p_td_thr_getgregs (&thandle, gregset); |
| 563 | if (val != TD_OK) |
| 564 | error (_("sol_thread_store_registers: td_thr_getgregs %s"), |
| 565 | td_err_string (val)); |
| 566 | val = p_td_thr_getfpregs (&thandle, &fpregset); |
| 567 | if (val != TD_OK) |
| 568 | error (_("sol_thread_store_registers: td_thr_getfpregs %s"), |
| 569 | td_err_string (val)); |
| 570 | } |
| 571 | |
| 572 | fill_gregset (regcache, (gdb_gregset_t *) &gregset, regnum); |
| 573 | fill_fpregset (regcache, (gdb_fpregset_t *) &fpregset, regnum); |
| 574 | |
| 575 | val = p_td_thr_setgregs (&thandle, gregset); |
| 576 | if (val != TD_OK) |
| 577 | error (_("sol_thread_store_registers: td_thr_setgregs %s"), |
| 578 | td_err_string (val)); |
| 579 | val = p_td_thr_setfpregs (&thandle, &fpregset); |
| 580 | if (val != TD_OK) |
| 581 | error (_("sol_thread_store_registers: td_thr_setfpregs %s"), |
| 582 | td_err_string (val)); |
| 583 | } |
| 584 | |
| 585 | /* Perform partial transfers on OBJECT. See target_read_partial and |
| 586 | target_write_partial for details of each variant. One, and only |
| 587 | one, of readbuf or writebuf must be non-NULL. */ |
| 588 | |
| 589 | enum target_xfer_status |
| 590 | sol_thread_target::xfer_partial (enum target_object object, |
| 591 | const char *annex, gdb_byte *readbuf, |
| 592 | const gdb_byte *writebuf, |
| 593 | ULONGEST offset, ULONGEST len, |
| 594 | ULONGEST *xfered_len) |
| 595 | { |
| 596 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
| 597 | |
| 598 | if (inferior_ptid.tid_p () || !target_thread_alive (inferior_ptid)) |
| 599 | { |
| 600 | /* It's either a thread or an LWP that isn't alive. Any live |
| 601 | LWP will do so use the first available. |
| 602 | |
| 603 | NOTE: We don't need to call switch_to_thread; we're just |
| 604 | reading memory. */ |
| 605 | inferior_ptid = procfs_first_available (); |
| 606 | } |
| 607 | |
| 608 | return beneath ()->xfer_partial (object, annex, readbuf, |
| 609 | writebuf, offset, len, xfered_len); |
| 610 | } |
| 611 | |
| 612 | static void |
| 613 | check_for_thread_db (void) |
| 614 | { |
| 615 | td_err_e err; |
| 616 | ptid_t ptid; |
| 617 | |
| 618 | /* Don't attempt to use thread_db for remote targets. */ |
| 619 | if (!(target_can_run () || core_bfd)) |
| 620 | return; |
| 621 | |
| 622 | /* Do nothing if we couldn't load libthread_db.so.1. */ |
| 623 | if (p_td_ta_new == NULL) |
| 624 | return; |
| 625 | |
| 626 | if (sol_thread_active) |
| 627 | /* Nothing to do. The thread library was already detected and the |
| 628 | target vector was already activated. */ |
| 629 | return; |
| 630 | |
| 631 | /* Now, initialize libthread_db. This needs to be done after the |
| 632 | shared libraries are located because it needs information from |
| 633 | the user's thread library. */ |
| 634 | |
| 635 | err = p_td_init (); |
| 636 | if (err != TD_OK) |
| 637 | { |
| 638 | warning (_("sol_thread_new_objfile: td_init: %s"), td_err_string (err)); |
| 639 | return; |
| 640 | } |
| 641 | |
| 642 | /* Now attempt to open a connection to the thread library. */ |
| 643 | err = p_td_ta_new (&main_ph, &main_ta); |
| 644 | switch (err) |
| 645 | { |
| 646 | case TD_NOLIBTHREAD: |
| 647 | /* No thread library was detected. */ |
| 648 | break; |
| 649 | |
| 650 | case TD_OK: |
| 651 | printf_unfiltered (_("[Thread debugging using libthread_db enabled]\n")); |
| 652 | |
| 653 | /* The thread library was detected. Activate the sol_thread target. */ |
| 654 | push_target (&sol_thread_ops); |
| 655 | sol_thread_active = 1; |
| 656 | |
| 657 | main_ph.ptid = inferior_ptid; /* Save for xfer_memory. */ |
| 658 | ptid = lwp_to_thread (inferior_ptid); |
| 659 | if (ptid.pid () != -1) |
| 660 | inferior_ptid = ptid; |
| 661 | |
| 662 | target_update_thread_list (); |
| 663 | break; |
| 664 | |
| 665 | default: |
| 666 | warning (_("Cannot initialize thread debugging library: %s"), |
| 667 | td_err_string (err)); |
| 668 | break; |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | /* This routine is called whenever a new symbol table is read in, or |
| 673 | when all symbol tables are removed. libthread_db can only be |
| 674 | initialized when it finds the right variables in libthread.so. |
| 675 | Since it's a shared library, those variables don't show up until |
| 676 | the library gets mapped and the symbol table is read in. */ |
| 677 | |
| 678 | static void |
| 679 | sol_thread_new_objfile (struct objfile *objfile) |
| 680 | { |
| 681 | if (objfile != NULL) |
| 682 | check_for_thread_db (); |
| 683 | } |
| 684 | |
| 685 | /* Clean up after the inferior dies. */ |
| 686 | |
| 687 | void |
| 688 | sol_thread_target::mourn_inferior () |
| 689 | { |
| 690 | target_ops *beneath = this->beneath (); |
| 691 | |
| 692 | sol_thread_active = 0; |
| 693 | |
| 694 | unpush_target (this); |
| 695 | |
| 696 | beneath->mourn_inferior (); |
| 697 | } |
| 698 | |
| 699 | /* Return true if PTID is still active in the inferior. */ |
| 700 | |
| 701 | bool |
| 702 | sol_thread_target::thread_alive (ptid_t ptid) |
| 703 | { |
| 704 | if (ptid.tid_p ()) |
| 705 | { |
| 706 | /* It's a (user-level) thread. */ |
| 707 | td_err_e val; |
| 708 | td_thrhandle_t th; |
| 709 | int pid; |
| 710 | |
| 711 | pid = ptid.tid (); |
| 712 | val = p_td_ta_map_id2thr (main_ta, pid, &th); |
| 713 | if (val != TD_OK) |
| 714 | return false; /* Thread not found. */ |
| 715 | val = p_td_thr_validate (&th); |
| 716 | if (val != TD_OK) |
| 717 | return false; /* Thread not valid. */ |
| 718 | return true; /* Known thread. */ |
| 719 | } |
| 720 | else |
| 721 | { |
| 722 | /* It's an LPW; pass the request on to the layer below. */ |
| 723 | return beneath ()->thread_alive (ptid); |
| 724 | } |
| 725 | } |
| 726 | |
| 727 | \f |
| 728 | /* These routines implement the lower half of the thread_db interface, |
| 729 | i.e. the ps_* routines. */ |
| 730 | |
| 731 | /* The next four routines are called by libthread_db to tell us to |
| 732 | stop and stop a particular process or lwp. Since GDB ensures that |
| 733 | these are all stopped by the time we call anything in thread_db, |
| 734 | these routines need to do nothing. */ |
| 735 | |
| 736 | /* Process stop. */ |
| 737 | |
| 738 | ps_err_e |
| 739 | ps_pstop (struct ps_prochandle *ph) |
| 740 | { |
| 741 | return PS_OK; |
| 742 | } |
| 743 | |
| 744 | /* Process continue. */ |
| 745 | |
| 746 | ps_err_e |
| 747 | ps_pcontinue (struct ps_prochandle *ph) |
| 748 | { |
| 749 | return PS_OK; |
| 750 | } |
| 751 | |
| 752 | /* LWP stop. */ |
| 753 | |
| 754 | ps_err_e |
| 755 | ps_lstop (struct ps_prochandle *ph, lwpid_t lwpid) |
| 756 | { |
| 757 | return PS_OK; |
| 758 | } |
| 759 | |
| 760 | /* LWP continue. */ |
| 761 | |
| 762 | ps_err_e |
| 763 | ps_lcontinue (struct ps_prochandle *ph, lwpid_t lwpid) |
| 764 | { |
| 765 | return PS_OK; |
| 766 | } |
| 767 | |
| 768 | /* Looks up the symbol LD_SYMBOL_NAME in the debugger's symbol table. */ |
| 769 | |
| 770 | ps_err_e |
| 771 | ps_pglobal_lookup (struct ps_prochandle *ph, const char *ld_object_name, |
| 772 | const char *ld_symbol_name, psaddr_t *ld_symbol_addr) |
| 773 | { |
| 774 | struct bound_minimal_symbol ms; |
| 775 | |
| 776 | ms = lookup_minimal_symbol (ld_symbol_name, NULL, NULL); |
| 777 | if (!ms.minsym) |
| 778 | return PS_NOSYM; |
| 779 | |
| 780 | *ld_symbol_addr = BMSYMBOL_VALUE_ADDRESS (ms); |
| 781 | return PS_OK; |
| 782 | } |
| 783 | |
| 784 | /* Common routine for reading and writing memory. */ |
| 785 | |
| 786 | static ps_err_e |
| 787 | rw_common (int dowrite, const struct ps_prochandle *ph, psaddr_t addr, |
| 788 | gdb_byte *buf, int size) |
| 789 | { |
| 790 | int ret; |
| 791 | |
| 792 | scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid); |
| 793 | |
| 794 | if (inferior_ptid.tid_p () || !target_thread_alive (inferior_ptid)) |
| 795 | { |
| 796 | /* It's either a thread or an LWP that isn't alive. Any live |
| 797 | LWP will do so use the first available. |
| 798 | |
| 799 | NOTE: We don't need to call switch_to_thread; we're just |
| 800 | reading memory. */ |
| 801 | inferior_ptid = procfs_first_available (); |
| 802 | } |
| 803 | |
| 804 | #if defined (__sparcv9) |
| 805 | /* For Sparc64 cross Sparc32, make sure the address has not been |
| 806 | accidentally sign-extended (or whatever) to beyond 32 bits. */ |
| 807 | if (bfd_get_arch_size (exec_bfd) == 32) |
| 808 | addr &= 0xffffffff; |
| 809 | #endif |
| 810 | |
| 811 | if (dowrite) |
| 812 | ret = target_write_memory (addr, (gdb_byte *) buf, size); |
| 813 | else |
| 814 | ret = target_read_memory (addr, (gdb_byte *) buf, size); |
| 815 | |
| 816 | return (ret == 0 ? PS_OK : PS_ERR); |
| 817 | } |
| 818 | |
| 819 | /* Copies SIZE bytes from target process .data segment to debugger memory. */ |
| 820 | |
| 821 | ps_err_e |
| 822 | ps_pdread (struct ps_prochandle *ph, psaddr_t addr, void *buf, size_t size) |
| 823 | { |
| 824 | return rw_common (0, ph, addr, (gdb_byte *) buf, size); |
| 825 | } |
| 826 | |
| 827 | /* Copies SIZE bytes from debugger memory .data segment to target process. */ |
| 828 | |
| 829 | ps_err_e |
| 830 | ps_pdwrite (struct ps_prochandle *ph, psaddr_t addr, |
| 831 | const void *buf, size_t size) |
| 832 | { |
| 833 | return rw_common (1, ph, addr, (gdb_byte *) buf, size); |
| 834 | } |
| 835 | |
| 836 | /* Copies SIZE bytes from target process .text segment to debugger memory. */ |
| 837 | |
| 838 | ps_err_e |
| 839 | ps_ptread (struct ps_prochandle *ph, psaddr_t addr, void *buf, size_t size) |
| 840 | { |
| 841 | return rw_common (0, ph, addr, (gdb_byte *) buf, size); |
| 842 | } |
| 843 | |
| 844 | /* Copies SIZE bytes from debugger memory .text segment to target process. */ |
| 845 | |
| 846 | ps_err_e |
| 847 | ps_ptwrite (struct ps_prochandle *ph, psaddr_t addr, |
| 848 | const void *buf, size_t size) |
| 849 | { |
| 850 | return rw_common (1, ph, addr, (gdb_byte *) buf, size); |
| 851 | } |
| 852 | |
| 853 | /* Get general-purpose registers for LWP. */ |
| 854 | |
| 855 | ps_err_e |
| 856 | ps_lgetregs (struct ps_prochandle *ph, lwpid_t lwpid, prgregset_t gregset) |
| 857 | { |
| 858 | ptid_t ptid = ptid_t (inferior_ptid.pid (), lwpid, 0); |
| 859 | struct regcache *regcache |
| 860 | = get_thread_arch_regcache (current_inferior ()->process_target (), |
| 861 | ptid, target_gdbarch ()); |
| 862 | |
| 863 | target_fetch_registers (regcache, -1); |
| 864 | fill_gregset (regcache, (gdb_gregset_t *) gregset, -1); |
| 865 | |
| 866 | return PS_OK; |
| 867 | } |
| 868 | |
| 869 | /* Set general-purpose registers for LWP. */ |
| 870 | |
| 871 | ps_err_e |
| 872 | ps_lsetregs (struct ps_prochandle *ph, lwpid_t lwpid, |
| 873 | const prgregset_t gregset) |
| 874 | { |
| 875 | ptid_t ptid = ptid_t (inferior_ptid.pid (), lwpid, 0); |
| 876 | struct regcache *regcache |
| 877 | = get_thread_arch_regcache (current_inferior ()->process_target (), |
| 878 | ptid, target_gdbarch ()); |
| 879 | |
| 880 | supply_gregset (regcache, (const gdb_gregset_t *) gregset); |
| 881 | target_store_registers (regcache, -1); |
| 882 | |
| 883 | return PS_OK; |
| 884 | } |
| 885 | |
| 886 | /* Log a message (sends to gdb_stderr). */ |
| 887 | |
| 888 | void |
| 889 | ps_plog (const char *fmt, ...) |
| 890 | { |
| 891 | va_list args; |
| 892 | |
| 893 | va_start (args, fmt); |
| 894 | |
| 895 | vfprintf_filtered (gdb_stderr, fmt, args); |
| 896 | } |
| 897 | |
| 898 | /* Get size of extra register set. Currently a noop. */ |
| 899 | |
| 900 | ps_err_e |
| 901 | ps_lgetxregsize (struct ps_prochandle *ph, lwpid_t lwpid, int *xregsize) |
| 902 | { |
| 903 | return PS_OK; |
| 904 | } |
| 905 | |
| 906 | /* Get extra register set. Currently a noop. */ |
| 907 | |
| 908 | ps_err_e |
| 909 | ps_lgetxregs (struct ps_prochandle *ph, lwpid_t lwpid, caddr_t xregset) |
| 910 | { |
| 911 | return PS_OK; |
| 912 | } |
| 913 | |
| 914 | /* Set extra register set. Currently a noop. */ |
| 915 | |
| 916 | ps_err_e |
| 917 | ps_lsetxregs (struct ps_prochandle *ph, lwpid_t lwpid, caddr_t xregset) |
| 918 | { |
| 919 | return PS_OK; |
| 920 | } |
| 921 | |
| 922 | /* Get floating-point registers for LWP. */ |
| 923 | |
| 924 | ps_err_e |
| 925 | ps_lgetfpregs (struct ps_prochandle *ph, lwpid_t lwpid, |
| 926 | prfpregset_t *fpregset) |
| 927 | { |
| 928 | ptid_t ptid = ptid_t (inferior_ptid.pid (), lwpid, 0); |
| 929 | struct regcache *regcache |
| 930 | = get_thread_arch_regcache (current_inferior ()->process_target (), |
| 931 | ptid, target_gdbarch ()); |
| 932 | |
| 933 | target_fetch_registers (regcache, -1); |
| 934 | fill_fpregset (regcache, (gdb_fpregset_t *) fpregset, -1); |
| 935 | |
| 936 | return PS_OK; |
| 937 | } |
| 938 | |
| 939 | /* Set floating-point regs for LWP. */ |
| 940 | |
| 941 | ps_err_e |
| 942 | ps_lsetfpregs (struct ps_prochandle *ph, lwpid_t lwpid, |
| 943 | const prfpregset_t * fpregset) |
| 944 | { |
| 945 | ptid_t ptid = ptid_t (inferior_ptid.pid (), lwpid, 0); |
| 946 | struct regcache *regcache |
| 947 | = get_thread_arch_regcache (current_inferior ()->process_target (), |
| 948 | ptid, target_gdbarch ()); |
| 949 | |
| 950 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregset); |
| 951 | target_store_registers (regcache, -1); |
| 952 | |
| 953 | return PS_OK; |
| 954 | } |
| 955 | |
| 956 | /* Identify process as 32-bit or 64-bit. At the moment we're using |
| 957 | BFD to do this. There might be a more Solaris-specific |
| 958 | (e.g. procfs) method, but this ought to work. */ |
| 959 | |
| 960 | ps_err_e |
| 961 | ps_pdmodel (struct ps_prochandle *ph, int *data_model) |
| 962 | { |
| 963 | if (exec_bfd == 0) |
| 964 | *data_model = PR_MODEL_UNKNOWN; |
| 965 | else if (bfd_get_arch_size (exec_bfd) == 32) |
| 966 | *data_model = PR_MODEL_ILP32; |
| 967 | else |
| 968 | *data_model = PR_MODEL_LP64; |
| 969 | |
| 970 | return PS_OK; |
| 971 | } |
| 972 | |
| 973 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
| 974 | |
| 975 | /* Reads the local descriptor table of a LWP. |
| 976 | |
| 977 | This function is necessary on x86-solaris only. Without it, the loading |
| 978 | of libthread_db would fail because of ps_lgetLDT being undefined. */ |
| 979 | |
| 980 | ps_err_e |
| 981 | ps_lgetLDT (struct ps_prochandle *ph, lwpid_t lwpid, struct ssd *pldt) /* ARI: editCase function */ |
| 982 | { |
| 983 | /* NOTE: only used on Solaris, therefore OK to refer to procfs.c. */ |
| 984 | struct ssd *ret; |
| 985 | |
| 986 | /* FIXME: can't I get the process ID from the prochandle or |
| 987 | something? */ |
| 988 | |
| 989 | if (inferior_ptid.pid () <= 0 || lwpid <= 0) |
| 990 | return PS_BADLID; |
| 991 | |
| 992 | ret = procfs_find_LDT_entry (ptid_t (inferior_ptid.pid (), |
| 993 | lwpid, 0)); |
| 994 | if (ret) |
| 995 | { |
| 996 | memcpy (pldt, ret, sizeof (struct ssd)); |
| 997 | return PS_OK; |
| 998 | } |
| 999 | else |
| 1000 | /* LDT not found. */ |
| 1001 | return PS_ERR; |
| 1002 | } |
| 1003 | #endif |
| 1004 | \f |
| 1005 | |
| 1006 | /* Convert PTID to printable form. */ |
| 1007 | |
| 1008 | std::string |
| 1009 | sol_thread_target::pid_to_str (ptid_t ptid) |
| 1010 | { |
| 1011 | if (ptid.tid_p ()) |
| 1012 | { |
| 1013 | ptid_t lwp; |
| 1014 | |
| 1015 | lwp = thread_to_lwp (ptid, -2); |
| 1016 | |
| 1017 | if (lwp.pid () == -1) |
| 1018 | return string_printf ("Thread %ld (defunct)", |
| 1019 | ptid.tid ()); |
| 1020 | else if (lwp.pid () != -2) |
| 1021 | return string_printf ("Thread %ld (LWP %ld)", |
| 1022 | ptid.tid (), lwp.lwp ()); |
| 1023 | else |
| 1024 | return string_printf ("Thread %ld ", |
| 1025 | ptid.tid ()); |
| 1026 | } |
| 1027 | else if (ptid.lwp () != 0) |
| 1028 | return string_printf ("LWP %ld ", ptid.lwp ()); |
| 1029 | else |
| 1030 | return string_printf ("process %d ", ptid.pid ()); |
| 1031 | } |
| 1032 | \f |
| 1033 | |
| 1034 | /* Worker bee for update_thread_list. Callback function that gets |
| 1035 | called once per user-level thread (i.e. not for LWP's). */ |
| 1036 | |
| 1037 | static int |
| 1038 | sol_update_thread_list_callback (const td_thrhandle_t *th, void *ignored) |
| 1039 | { |
| 1040 | td_err_e retval; |
| 1041 | td_thrinfo_t ti; |
| 1042 | |
| 1043 | retval = p_td_thr_get_info (th, &ti); |
| 1044 | if (retval != TD_OK) |
| 1045 | return -1; |
| 1046 | |
| 1047 | ptid_t ptid = ptid_t (inferior_ptid.pid (), 0, ti.ti_tid); |
| 1048 | thread_info *thr = find_thread_ptid (current_inferior (), ptid); |
| 1049 | if (thr == NULL || thr->state == THREAD_EXITED) |
| 1050 | { |
| 1051 | process_stratum_target *proc_target |
| 1052 | = current_inferior ()->process_target (); |
| 1053 | add_thread (proc_target, ptid); |
| 1054 | } |
| 1055 | |
| 1056 | return 0; |
| 1057 | } |
| 1058 | |
| 1059 | void |
| 1060 | sol_thread_target::update_thread_list () |
| 1061 | { |
| 1062 | /* Delete dead threads. */ |
| 1063 | prune_threads (); |
| 1064 | |
| 1065 | /* Find any new LWP's. */ |
| 1066 | beneath ()->update_thread_list (); |
| 1067 | |
| 1068 | /* Then find any new user-level threads. */ |
| 1069 | p_td_ta_thr_iter (main_ta, sol_update_thread_list_callback, (void *) 0, |
| 1070 | TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY, |
| 1071 | TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS); |
| 1072 | } |
| 1073 | |
| 1074 | /* Worker bee for the "info sol-thread" command. This is a callback |
| 1075 | function that gets called once for each Solaris user-level thread |
| 1076 | (i.e. not for LWPs) in the inferior. Print anything interesting |
| 1077 | that we can think of. */ |
| 1078 | |
| 1079 | static int |
| 1080 | info_cb (const td_thrhandle_t *th, void *s) |
| 1081 | { |
| 1082 | td_err_e ret; |
| 1083 | td_thrinfo_t ti; |
| 1084 | |
| 1085 | ret = p_td_thr_get_info (th, &ti); |
| 1086 | if (ret == TD_OK) |
| 1087 | { |
| 1088 | printf_filtered ("%s thread #%d, lwp %d, ", |
| 1089 | ti.ti_type == TD_THR_SYSTEM ? "system" : "user ", |
| 1090 | ti.ti_tid, ti.ti_lid); |
| 1091 | switch (ti.ti_state) |
| 1092 | { |
| 1093 | default: |
| 1094 | case TD_THR_UNKNOWN: |
| 1095 | printf_filtered ("<unknown state>"); |
| 1096 | break; |
| 1097 | case TD_THR_STOPPED: |
| 1098 | printf_filtered ("(stopped)"); |
| 1099 | break; |
| 1100 | case TD_THR_RUN: |
| 1101 | printf_filtered ("(run) "); |
| 1102 | break; |
| 1103 | case TD_THR_ACTIVE: |
| 1104 | printf_filtered ("(active) "); |
| 1105 | break; |
| 1106 | case TD_THR_ZOMBIE: |
| 1107 | printf_filtered ("(zombie) "); |
| 1108 | break; |
| 1109 | case TD_THR_SLEEP: |
| 1110 | printf_filtered ("(asleep) "); |
| 1111 | break; |
| 1112 | case TD_THR_STOPPED_ASLEEP: |
| 1113 | printf_filtered ("(stopped asleep)"); |
| 1114 | break; |
| 1115 | } |
| 1116 | /* Print thr_create start function. */ |
| 1117 | if (ti.ti_startfunc != 0) |
| 1118 | { |
| 1119 | const struct bound_minimal_symbol msym |
| 1120 | = lookup_minimal_symbol_by_pc (ti.ti_startfunc); |
| 1121 | |
| 1122 | printf_filtered (" startfunc=%s", |
| 1123 | msym.minsym |
| 1124 | ? msym.minsym->print_name () |
| 1125 | : paddress (target_gdbarch (), ti.ti_startfunc)); |
| 1126 | } |
| 1127 | |
| 1128 | /* If thread is asleep, print function that went to sleep. */ |
| 1129 | if (ti.ti_state == TD_THR_SLEEP) |
| 1130 | { |
| 1131 | const struct bound_minimal_symbol msym |
| 1132 | = lookup_minimal_symbol_by_pc (ti.ti_pc); |
| 1133 | |
| 1134 | printf_filtered (" sleepfunc=%s", |
| 1135 | msym.minsym |
| 1136 | ? msym.minsym->print_name () |
| 1137 | : paddress (target_gdbarch (), ti.ti_pc)); |
| 1138 | } |
| 1139 | |
| 1140 | printf_filtered ("\n"); |
| 1141 | } |
| 1142 | else |
| 1143 | warning (_("info sol-thread: failed to get info for thread.")); |
| 1144 | |
| 1145 | return 0; |
| 1146 | } |
| 1147 | |
| 1148 | /* List some state about each Solaris user-level thread in the |
| 1149 | inferior. */ |
| 1150 | |
| 1151 | static void |
| 1152 | info_solthreads (const char *args, int from_tty) |
| 1153 | { |
| 1154 | p_td_ta_thr_iter (main_ta, info_cb, (void *) args, |
| 1155 | TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY, |
| 1156 | TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS); |
| 1157 | } |
| 1158 | |
| 1159 | /* Callback routine used to find a thread based on the TID part of |
| 1160 | its PTID. */ |
| 1161 | |
| 1162 | static int |
| 1163 | thread_db_find_thread_from_tid (struct thread_info *thread, void *data) |
| 1164 | { |
| 1165 | long *tid = (long *) data; |
| 1166 | |
| 1167 | if (thread->ptid.tid () == *tid) |
| 1168 | return 1; |
| 1169 | |
| 1170 | return 0; |
| 1171 | } |
| 1172 | |
| 1173 | ptid_t |
| 1174 | sol_thread_target::get_ada_task_ptid (long lwp, long thread) |
| 1175 | { |
| 1176 | struct thread_info *thread_info = |
| 1177 | iterate_over_threads (thread_db_find_thread_from_tid, &thread); |
| 1178 | |
| 1179 | if (thread_info == NULL) |
| 1180 | { |
| 1181 | /* The list of threads is probably not up to date. Find any |
| 1182 | thread that is missing from the list, and try again. */ |
| 1183 | update_thread_list (); |
| 1184 | thread_info = iterate_over_threads (thread_db_find_thread_from_tid, |
| 1185 | &thread); |
| 1186 | } |
| 1187 | |
| 1188 | gdb_assert (thread_info != NULL); |
| 1189 | |
| 1190 | return (thread_info->ptid); |
| 1191 | } |
| 1192 | |
| 1193 | void _initialize_sol_thread (); |
| 1194 | void |
| 1195 | _initialize_sol_thread () |
| 1196 | { |
| 1197 | void *dlhandle; |
| 1198 | |
| 1199 | dlhandle = dlopen ("libthread_db.so.1", RTLD_NOW); |
| 1200 | if (!dlhandle) |
| 1201 | goto die; |
| 1202 | |
| 1203 | #define resolve(X) \ |
| 1204 | if (!(p_##X = (X ## _ftype *) dlsym (dlhandle, #X))) \ |
| 1205 | goto die; |
| 1206 | |
| 1207 | resolve (td_log); |
| 1208 | resolve (td_ta_new); |
| 1209 | resolve (td_ta_delete); |
| 1210 | resolve (td_init); |
| 1211 | resolve (td_ta_get_ph); |
| 1212 | resolve (td_ta_get_nthreads); |
| 1213 | resolve (td_ta_tsd_iter); |
| 1214 | resolve (td_ta_thr_iter); |
| 1215 | resolve (td_thr_validate); |
| 1216 | resolve (td_thr_tsd); |
| 1217 | resolve (td_thr_get_info); |
| 1218 | resolve (td_thr_getfpregs); |
| 1219 | resolve (td_thr_getxregsize); |
| 1220 | resolve (td_thr_getxregs); |
| 1221 | resolve (td_thr_sigsetmask); |
| 1222 | resolve (td_thr_setprio); |
| 1223 | resolve (td_thr_setsigpending); |
| 1224 | resolve (td_thr_setfpregs); |
| 1225 | resolve (td_thr_setxregs); |
| 1226 | resolve (td_ta_map_id2thr); |
| 1227 | resolve (td_ta_map_lwp2thr); |
| 1228 | resolve (td_thr_getgregs); |
| 1229 | resolve (td_thr_setgregs); |
| 1230 | |
| 1231 | add_cmd ("sol-threads", class_maintenance, info_solthreads, |
| 1232 | _("Show info on Solaris user threads."), &maintenanceinfolist); |
| 1233 | |
| 1234 | /* Hook into new_objfile notification. */ |
| 1235 | gdb::observers::new_objfile.attach (sol_thread_new_objfile); |
| 1236 | return; |
| 1237 | |
| 1238 | die: |
| 1239 | fprintf_unfiltered (gdb_stderr, "\ |
| 1240 | [GDB will not be able to debug user-mode threads: %s]\n", dlerror ()); |
| 1241 | |
| 1242 | if (dlhandle) |
| 1243 | dlclose (dlhandle); |
| 1244 | |
| 1245 | return; |
| 1246 | } |