| 1 | /* Solaris threads debugging interface. |
| 2 | |
| 3 | Copyright (C) 1996-2016 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 respectivly) 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 "observer.h" |
| 67 | #include "procfs.h" |
| 68 | #include "symtab.h" |
| 69 | #include "minsyms.h" |
| 70 | #include "objfiles.h" |
| 71 | |
| 72 | struct target_ops sol_thread_ops; |
| 73 | |
| 74 | /* Prototypes for supply_gregset etc. */ |
| 75 | #include "gregset.h" |
| 76 | |
| 77 | /* This struct is defined by us, but mainly used for the proc_service |
| 78 | interface. We don't have much use for it, except as a handy place |
| 79 | to get a real PID for memory accesses. */ |
| 80 | |
| 81 | struct ps_prochandle |
| 82 | { |
| 83 | ptid_t ptid; |
| 84 | }; |
| 85 | |
| 86 | struct string_map |
| 87 | { |
| 88 | int num; |
| 89 | char *str; |
| 90 | }; |
| 91 | |
| 92 | static struct ps_prochandle main_ph; |
| 93 | static td_thragent_t *main_ta; |
| 94 | static int sol_thread_active = 0; |
| 95 | |
| 96 | static void init_sol_thread_ops (void); |
| 97 | |
| 98 | /* Default definitions: These must be defined in tm.h if they are to |
| 99 | be shared with a process module such as procfs. */ |
| 100 | |
| 101 | /* Types of the libthread_db functions. */ |
| 102 | |
| 103 | typedef void (td_log_ftype)(const int on_off); |
| 104 | typedef td_err_e (td_ta_new_ftype)(const struct ps_prochandle *ph_p, |
| 105 | td_thragent_t **ta_pp); |
| 106 | typedef td_err_e (td_ta_delete_ftype)(td_thragent_t *ta_p); |
| 107 | typedef td_err_e (td_init_ftype)(void); |
| 108 | typedef td_err_e (td_ta_get_ph_ftype)(const td_thragent_t *ta_p, |
| 109 | struct ps_prochandle **ph_pp); |
| 110 | typedef td_err_e (td_ta_get_nthreads_ftype)(const td_thragent_t *ta_p, |
| 111 | int *nthread_p); |
| 112 | typedef td_err_e (td_ta_tsd_iter_ftype)(const td_thragent_t *ta_p, |
| 113 | td_key_iter_f *cb, void *cbdata_p); |
| 114 | typedef td_err_e (td_ta_thr_iter_ftype)(const td_thragent_t *ta_p, |
| 115 | td_thr_iter_f *cb, void *cbdata_p, |
| 116 | td_thr_state_e state, int ti_pri, |
| 117 | sigset_t *ti_sigmask_p, |
| 118 | unsigned ti_user_flags); |
| 119 | typedef td_err_e (td_thr_validate_ftype)(const td_thrhandle_t *th_p); |
| 120 | typedef td_err_e (td_thr_tsd_ftype)(const td_thrhandle_t * th_p, |
| 121 | const thread_key_t key, void **data_pp); |
| 122 | typedef td_err_e (td_thr_get_info_ftype)(const td_thrhandle_t *th_p, |
| 123 | td_thrinfo_t *ti_p); |
| 124 | typedef td_err_e (td_thr_getfpregs_ftype)(const td_thrhandle_t *th_p, |
| 125 | prfpregset_t *fpregset); |
| 126 | typedef td_err_e (td_thr_getxregsize_ftype)(const td_thrhandle_t *th_p, |
| 127 | int *xregsize); |
| 128 | typedef td_err_e (td_thr_getxregs_ftype)(const td_thrhandle_t *th_p, |
| 129 | const caddr_t xregset); |
| 130 | typedef td_err_e (td_thr_sigsetmask_ftype)(const td_thrhandle_t *th_p, |
| 131 | const sigset_t ti_sigmask); |
| 132 | typedef td_err_e (td_thr_setprio_ftype)(const td_thrhandle_t *th_p, |
| 133 | const int ti_pri); |
| 134 | typedef td_err_e (td_thr_setsigpending_ftype)(const td_thrhandle_t *th_p, |
| 135 | const uchar_t ti_pending_flag, |
| 136 | const sigset_t ti_pending); |
| 137 | typedef td_err_e (td_thr_setfpregs_ftype)(const td_thrhandle_t *th_p, |
| 138 | const prfpregset_t *fpregset); |
| 139 | typedef td_err_e (td_thr_setxregs_ftype)(const td_thrhandle_t *th_p, |
| 140 | const caddr_t xregset); |
| 141 | typedef td_err_e (td_ta_map_id2thr_ftype)(const td_thragent_t *ta_p, |
| 142 | thread_t tid, |
| 143 | td_thrhandle_t *th_p); |
| 144 | typedef td_err_e (td_ta_map_lwp2thr_ftype)(const td_thragent_t *ta_p, |
| 145 | lwpid_t lwpid, |
| 146 | td_thrhandle_t *th_p); |
| 147 | typedef td_err_e (td_thr_getgregs_ftype)(const td_thrhandle_t *th_p, |
| 148 | prgregset_t regset); |
| 149 | typedef td_err_e (td_thr_setgregs_ftype)(const td_thrhandle_t *th_p, |
| 150 | const prgregset_t regset); |
| 151 | |
| 152 | /* Pointers to routines from libthread_db resolved by dlopen(). */ |
| 153 | |
| 154 | static td_log_ftype *p_td_log; |
| 155 | static td_ta_new_ftype *p_td_ta_new; |
| 156 | static td_ta_delete_ftype *p_td_ta_delete; |
| 157 | static td_init_ftype *p_td_init; |
| 158 | static td_ta_get_ph_ftype *p_td_ta_get_ph; |
| 159 | static td_ta_get_nthreads_ftype *p_td_ta_get_nthreads; |
| 160 | static td_ta_tsd_iter_ftype *p_td_ta_tsd_iter; |
| 161 | static td_ta_thr_iter_ftype *p_td_ta_thr_iter; |
| 162 | static td_thr_validate_ftype *p_td_thr_validate; |
| 163 | static td_thr_tsd_ftype *p_td_thr_tsd; |
| 164 | static td_thr_get_info_ftype *p_td_thr_get_info; |
| 165 | static td_thr_getfpregs_ftype *p_td_thr_getfpregs; |
| 166 | static td_thr_getxregsize_ftype *p_td_thr_getxregsize; |
| 167 | static td_thr_getxregs_ftype *p_td_thr_getxregs; |
| 168 | static td_thr_sigsetmask_ftype *p_td_thr_sigsetmask; |
| 169 | static td_thr_setprio_ftype *p_td_thr_setprio; |
| 170 | static td_thr_setsigpending_ftype *p_td_thr_setsigpending; |
| 171 | static td_thr_setfpregs_ftype *p_td_thr_setfpregs; |
| 172 | static td_thr_setxregs_ftype *p_td_thr_setxregs; |
| 173 | static td_ta_map_id2thr_ftype *p_td_ta_map_id2thr; |
| 174 | static td_ta_map_lwp2thr_ftype *p_td_ta_map_lwp2thr; |
| 175 | static td_thr_getgregs_ftype *p_td_thr_getgregs; |
| 176 | static td_thr_setgregs_ftype *p_td_thr_setgregs; |
| 177 | \f |
| 178 | |
| 179 | /* Return the libthread_db error string associated with ERRCODE. If |
| 180 | ERRCODE is unknown, return an appropriate message. */ |
| 181 | |
| 182 | static char * |
| 183 | td_err_string (td_err_e errcode) |
| 184 | { |
| 185 | static struct string_map td_err_table[] = |
| 186 | { |
| 187 | { TD_OK, "generic \"call succeeded\"" }, |
| 188 | { TD_ERR, "generic error." }, |
| 189 | { TD_NOTHR, "no thread can be found to satisfy query" }, |
| 190 | { TD_NOSV, "no synch. variable can be found to satisfy query" }, |
| 191 | { TD_NOLWP, "no lwp can be found to satisfy query" }, |
| 192 | { TD_BADPH, "invalid process handle" }, |
| 193 | { TD_BADTH, "invalid thread handle" }, |
| 194 | { TD_BADSH, "invalid synchronization handle" }, |
| 195 | { TD_BADTA, "invalid thread agent" }, |
| 196 | { TD_BADKEY, "invalid key" }, |
| 197 | { TD_NOMSG, "td_thr_event_getmsg() called when there was no message" }, |
| 198 | { TD_NOFPREGS, "FPU register set not available for given thread" }, |
| 199 | { TD_NOLIBTHREAD, "application not linked with libthread" }, |
| 200 | { TD_NOEVENT, "requested event is not supported" }, |
| 201 | { TD_NOCAPAB, "capability not available" }, |
| 202 | { TD_DBERR, "Debugger service failed" }, |
| 203 | { TD_NOAPLIC, "Operation not applicable to" }, |
| 204 | { TD_NOTSD, "No thread specific data for this thread" }, |
| 205 | { TD_MALLOC, "Malloc failed" }, |
| 206 | { TD_PARTIALREG, "Only part of register set was written/read" }, |
| 207 | { TD_NOXREGS, "X register set not available for given thread" } |
| 208 | }; |
| 209 | const int td_err_size = sizeof td_err_table / sizeof (struct string_map); |
| 210 | int i; |
| 211 | static char buf[50]; |
| 212 | |
| 213 | for (i = 0; i < td_err_size; i++) |
| 214 | if (td_err_table[i].num == errcode) |
| 215 | return td_err_table[i].str; |
| 216 | |
| 217 | xsnprintf (buf, sizeof (buf), "Unknown libthread_db error code: %d", |
| 218 | errcode); |
| 219 | |
| 220 | return buf; |
| 221 | } |
| 222 | |
| 223 | /* Return the libthread_db state string assicoated with STATECODE. |
| 224 | If STATECODE is unknown, return an appropriate message. */ |
| 225 | |
| 226 | static char * |
| 227 | td_state_string (td_thr_state_e statecode) |
| 228 | { |
| 229 | static struct string_map td_thr_state_table[] = |
| 230 | { |
| 231 | { TD_THR_ANY_STATE, "any state" }, |
| 232 | { TD_THR_UNKNOWN, "unknown" }, |
| 233 | { TD_THR_STOPPED, "stopped" }, |
| 234 | { TD_THR_RUN, "run" }, |
| 235 | { TD_THR_ACTIVE, "active" }, |
| 236 | { TD_THR_ZOMBIE, "zombie" }, |
| 237 | { TD_THR_SLEEP, "sleep" }, |
| 238 | { TD_THR_STOPPED_ASLEEP, "stopped asleep" } |
| 239 | }; |
| 240 | const int td_thr_state_table_size = |
| 241 | sizeof td_thr_state_table / sizeof (struct string_map); |
| 242 | int i; |
| 243 | static char buf[50]; |
| 244 | |
| 245 | for (i = 0; i < td_thr_state_table_size; i++) |
| 246 | if (td_thr_state_table[i].num == statecode) |
| 247 | return td_thr_state_table[i].str; |
| 248 | |
| 249 | xsnprintf (buf, sizeof (buf), "Unknown libthread_db state code: %d", |
| 250 | statecode); |
| 251 | |
| 252 | return buf; |
| 253 | } |
| 254 | \f |
| 255 | |
| 256 | /* Convert a POSIX or Solaris thread ID into a LWP ID. If THREAD_ID |
| 257 | doesn't exist, that's an error. If it's an inactive thread, return |
| 258 | DEFAULT_LWP. |
| 259 | |
| 260 | NOTE: This function probably shouldn't call error(). */ |
| 261 | |
| 262 | static ptid_t |
| 263 | thread_to_lwp (ptid_t thread_id, int default_lwp) |
| 264 | { |
| 265 | td_thrinfo_t ti; |
| 266 | td_thrhandle_t th; |
| 267 | td_err_e val; |
| 268 | |
| 269 | if (ptid_lwp_p (thread_id)) |
| 270 | return thread_id; /* It's already an LWP ID. */ |
| 271 | |
| 272 | /* It's a thread. Convert to LWP. */ |
| 273 | |
| 274 | val = p_td_ta_map_id2thr (main_ta, ptid_get_tid (thread_id), &th); |
| 275 | if (val == TD_NOTHR) |
| 276 | return pid_to_ptid (-1); /* Thread must have terminated. */ |
| 277 | else if (val != TD_OK) |
| 278 | error (_("thread_to_lwp: td_ta_map_id2thr %s"), td_err_string (val)); |
| 279 | |
| 280 | val = p_td_thr_get_info (&th, &ti); |
| 281 | if (val == TD_NOTHR) |
| 282 | return pid_to_ptid (-1); /* Thread must have terminated. */ |
| 283 | else if (val != TD_OK) |
| 284 | error (_("thread_to_lwp: td_thr_get_info: %s"), td_err_string (val)); |
| 285 | |
| 286 | if (ti.ti_state != TD_THR_ACTIVE) |
| 287 | { |
| 288 | if (default_lwp != -1) |
| 289 | return pid_to_ptid (default_lwp); |
| 290 | error (_("thread_to_lwp: thread state not active: %s"), |
| 291 | td_state_string (ti.ti_state)); |
| 292 | } |
| 293 | |
| 294 | return ptid_build (ptid_get_pid (thread_id), ti.ti_lid, 0); |
| 295 | } |
| 296 | |
| 297 | /* Convert an LWP ID into a POSIX or Solaris thread ID. If LWP_ID |
| 298 | doesn't exists, that's an error. |
| 299 | |
| 300 | NOTE: This function probably shouldn't call error(). */ |
| 301 | |
| 302 | static ptid_t |
| 303 | lwp_to_thread (ptid_t lwp) |
| 304 | { |
| 305 | td_thrinfo_t ti; |
| 306 | td_thrhandle_t th; |
| 307 | td_err_e val; |
| 308 | |
| 309 | if (ptid_tid_p (lwp)) |
| 310 | return lwp; /* It's already a thread ID. */ |
| 311 | |
| 312 | /* It's an LWP. Convert it to a thread ID. */ |
| 313 | |
| 314 | if (!target_thread_alive (lwp)) |
| 315 | return pid_to_ptid (-1); /* Must be a defunct LPW. */ |
| 316 | |
| 317 | val = p_td_ta_map_lwp2thr (main_ta, ptid_get_lwp (lwp), &th); |
| 318 | if (val == TD_NOTHR) |
| 319 | return pid_to_ptid (-1); /* Thread must have terminated. */ |
| 320 | else if (val != TD_OK) |
| 321 | error (_("lwp_to_thread: td_ta_map_lwp2thr: %s."), td_err_string (val)); |
| 322 | |
| 323 | val = p_td_thr_validate (&th); |
| 324 | if (val == TD_NOTHR) |
| 325 | return lwp; /* Unknown to libthread; just return LPW, */ |
| 326 | else if (val != TD_OK) |
| 327 | error (_("lwp_to_thread: td_thr_validate: %s."), td_err_string (val)); |
| 328 | |
| 329 | val = p_td_thr_get_info (&th, &ti); |
| 330 | if (val == TD_NOTHR) |
| 331 | return pid_to_ptid (-1); /* Thread must have terminated. */ |
| 332 | else if (val != TD_OK) |
| 333 | error (_("lwp_to_thread: td_thr_get_info: %s."), td_err_string (val)); |
| 334 | |
| 335 | return ptid_build (ptid_get_pid (lwp), 0 , ti.ti_tid); |
| 336 | } |
| 337 | \f |
| 338 | |
| 339 | /* Most target vector functions from here on actually just pass |
| 340 | through to the layer beneath, as they don't need to do anything |
| 341 | specific for threads. */ |
| 342 | |
| 343 | /* Take a program previously attached to and detaches it. The program |
| 344 | resumes execution and will no longer stop on signals, etc. We'd |
| 345 | better not have left any breakpoints in the program or it'll die |
| 346 | when it hits one. For this to work, it may be necessary for the |
| 347 | process to have been previously attached. It *might* work if the |
| 348 | program was started via the normal ptrace (PTRACE_TRACEME). */ |
| 349 | |
| 350 | static void |
| 351 | sol_thread_detach (struct target_ops *ops, const char *args, int from_tty) |
| 352 | { |
| 353 | struct target_ops *beneath = find_target_beneath (ops); |
| 354 | |
| 355 | sol_thread_active = 0; |
| 356 | inferior_ptid = pid_to_ptid (ptid_get_pid (main_ph.ptid)); |
| 357 | unpush_target (ops); |
| 358 | beneath->to_detach (beneath, args, from_tty); |
| 359 | } |
| 360 | |
| 361 | /* Resume execution of process PTID. If STEP is nozero, then just |
| 362 | single step it. If SIGNAL is nonzero, restart it with that signal |
| 363 | activated. We may have to convert PTID from a thread ID to an LWP |
| 364 | ID for procfs. */ |
| 365 | |
| 366 | static void |
| 367 | sol_thread_resume (struct target_ops *ops, |
| 368 | ptid_t ptid, int step, enum gdb_signal signo) |
| 369 | { |
| 370 | struct cleanup *old_chain; |
| 371 | struct target_ops *beneath = find_target_beneath (ops); |
| 372 | |
| 373 | old_chain = save_inferior_ptid (); |
| 374 | |
| 375 | inferior_ptid = thread_to_lwp (inferior_ptid, ptid_get_pid (main_ph.ptid)); |
| 376 | if (ptid_get_pid (inferior_ptid) == -1) |
| 377 | inferior_ptid = procfs_first_available (); |
| 378 | |
| 379 | if (ptid_get_pid (ptid) != -1) |
| 380 | { |
| 381 | ptid_t save_ptid = ptid; |
| 382 | |
| 383 | ptid = thread_to_lwp (ptid, -2); |
| 384 | if (ptid_get_pid (ptid) == -2) /* Inactive thread. */ |
| 385 | error (_("This version of Solaris can't start inactive threads.")); |
| 386 | if (info_verbose && ptid_get_pid (ptid) == -1) |
| 387 | warning (_("Specified thread %ld seems to have terminated"), |
| 388 | ptid_get_tid (save_ptid)); |
| 389 | } |
| 390 | |
| 391 | beneath->to_resume (beneath, ptid, step, signo); |
| 392 | |
| 393 | do_cleanups (old_chain); |
| 394 | } |
| 395 | |
| 396 | /* Wait for any threads to stop. We may have to convert PTID from a |
| 397 | thread ID to an LWP ID, and vice versa on the way out. */ |
| 398 | |
| 399 | static ptid_t |
| 400 | sol_thread_wait (struct target_ops *ops, |
| 401 | ptid_t ptid, struct target_waitstatus *ourstatus, int options) |
| 402 | { |
| 403 | ptid_t rtnval; |
| 404 | ptid_t save_ptid; |
| 405 | struct target_ops *beneath = find_target_beneath (ops); |
| 406 | struct cleanup *old_chain; |
| 407 | |
| 408 | save_ptid = inferior_ptid; |
| 409 | old_chain = save_inferior_ptid (); |
| 410 | |
| 411 | inferior_ptid = thread_to_lwp (inferior_ptid, ptid_get_pid (main_ph.ptid)); |
| 412 | if (ptid_get_pid (inferior_ptid) == -1) |
| 413 | inferior_ptid = procfs_first_available (); |
| 414 | |
| 415 | if (ptid_get_pid (ptid) != -1) |
| 416 | { |
| 417 | ptid_t save_ptid = ptid; |
| 418 | |
| 419 | ptid = thread_to_lwp (ptid, -2); |
| 420 | if (ptid_get_pid (ptid) == -2) /* Inactive thread. */ |
| 421 | error (_("This version of Solaris can't start inactive threads.")); |
| 422 | if (info_verbose && ptid_get_pid (ptid) == -1) |
| 423 | warning (_("Specified thread %ld seems to have terminated"), |
| 424 | ptid_get_tid (save_ptid)); |
| 425 | } |
| 426 | |
| 427 | rtnval = beneath->to_wait (beneath, ptid, ourstatus, options); |
| 428 | |
| 429 | if (ourstatus->kind != TARGET_WAITKIND_EXITED) |
| 430 | { |
| 431 | /* Map the LWP of interest back to the appropriate thread ID. */ |
| 432 | rtnval = lwp_to_thread (rtnval); |
| 433 | if (ptid_get_pid (rtnval) == -1) |
| 434 | rtnval = save_ptid; |
| 435 | |
| 436 | /* See if we have a new thread. */ |
| 437 | if (ptid_tid_p (rtnval) |
| 438 | && !ptid_equal (rtnval, save_ptid) |
| 439 | && (!in_thread_list (rtnval) |
| 440 | || is_exited (rtnval))) |
| 441 | add_thread (rtnval); |
| 442 | } |
| 443 | |
| 444 | /* During process initialization, we may get here without the thread |
| 445 | package being initialized, since that can only happen after we've |
| 446 | found the shared libs. */ |
| 447 | |
| 448 | do_cleanups (old_chain); |
| 449 | |
| 450 | return rtnval; |
| 451 | } |
| 452 | |
| 453 | static void |
| 454 | sol_thread_fetch_registers (struct target_ops *ops, |
| 455 | struct regcache *regcache, int regnum) |
| 456 | { |
| 457 | thread_t thread; |
| 458 | td_thrhandle_t thandle; |
| 459 | td_err_e val; |
| 460 | prgregset_t gregset; |
| 461 | prfpregset_t fpregset; |
| 462 | gdb_gregset_t *gregset_p = &gregset; |
| 463 | gdb_fpregset_t *fpregset_p = &fpregset; |
| 464 | struct target_ops *beneath = find_target_beneath (ops); |
| 465 | |
| 466 | if (!ptid_tid_p (inferior_ptid)) |
| 467 | { |
| 468 | /* It's an LWP; pass the request on to the layer beneath. */ |
| 469 | beneath->to_fetch_registers (beneath, regcache, regnum); |
| 470 | return; |
| 471 | } |
| 472 | |
| 473 | /* Solaris thread: convert INFERIOR_PTID into a td_thrhandle_t. */ |
| 474 | thread = ptid_get_tid (inferior_ptid); |
| 475 | if (thread == 0) |
| 476 | error (_("sol_thread_fetch_registers: thread == 0")); |
| 477 | |
| 478 | val = p_td_ta_map_id2thr (main_ta, thread, &thandle); |
| 479 | if (val != TD_OK) |
| 480 | error (_("sol_thread_fetch_registers: td_ta_map_id2thr: %s"), |
| 481 | td_err_string (val)); |
| 482 | |
| 483 | /* Get the general-purpose registers. */ |
| 484 | |
| 485 | val = p_td_thr_getgregs (&thandle, gregset); |
| 486 | if (val != TD_OK && val != TD_PARTIALREG) |
| 487 | error (_("sol_thread_fetch_registers: td_thr_getgregs %s"), |
| 488 | td_err_string (val)); |
| 489 | |
| 490 | /* For SPARC, TD_PARTIALREG means that only %i0...%i7, %l0..%l7, %pc |
| 491 | and %sp are saved (by a thread context switch). */ |
| 492 | |
| 493 | /* And, now the floating-point registers. */ |
| 494 | |
| 495 | val = p_td_thr_getfpregs (&thandle, &fpregset); |
| 496 | if (val != TD_OK && val != TD_NOFPREGS) |
| 497 | error (_("sol_thread_fetch_registers: td_thr_getfpregs %s"), |
| 498 | td_err_string (val)); |
| 499 | |
| 500 | /* Note that we must call supply_gregset and supply_fpregset *after* |
| 501 | calling the td routines because the td routines call ps_lget* |
| 502 | which affect the values stored in the registers array. */ |
| 503 | |
| 504 | supply_gregset (regcache, (const gdb_gregset_t *) gregset_p); |
| 505 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregset_p); |
| 506 | } |
| 507 | |
| 508 | static void |
| 509 | sol_thread_store_registers (struct target_ops *ops, |
| 510 | struct regcache *regcache, int regnum) |
| 511 | { |
| 512 | thread_t thread; |
| 513 | td_thrhandle_t thandle; |
| 514 | td_err_e val; |
| 515 | prgregset_t gregset; |
| 516 | prfpregset_t fpregset; |
| 517 | |
| 518 | if (!ptid_tid_p (inferior_ptid)) |
| 519 | { |
| 520 | struct target_ops *beneath = find_target_beneath (ops); |
| 521 | |
| 522 | /* It's an LWP; pass the request on to the layer beneath. */ |
| 523 | beneath->to_store_registers (beneath, regcache, regnum); |
| 524 | return; |
| 525 | } |
| 526 | |
| 527 | /* Solaris thread: convert INFERIOR_PTID into a td_thrhandle_t. */ |
| 528 | thread = ptid_get_tid (inferior_ptid); |
| 529 | |
| 530 | val = p_td_ta_map_id2thr (main_ta, thread, &thandle); |
| 531 | if (val != TD_OK) |
| 532 | error (_("sol_thread_store_registers: td_ta_map_id2thr %s"), |
| 533 | td_err_string (val)); |
| 534 | |
| 535 | if (regnum != -1) |
| 536 | { |
| 537 | /* Not writing all the registers. */ |
| 538 | char old_value[MAX_REGISTER_SIZE]; |
| 539 | |
| 540 | /* Save new register value. */ |
| 541 | regcache_raw_collect (regcache, regnum, old_value); |
| 542 | |
| 543 | val = p_td_thr_getgregs (&thandle, gregset); |
| 544 | if (val != TD_OK) |
| 545 | error (_("sol_thread_store_registers: td_thr_getgregs %s"), |
| 546 | td_err_string (val)); |
| 547 | val = p_td_thr_getfpregs (&thandle, &fpregset); |
| 548 | if (val != TD_OK) |
| 549 | error (_("sol_thread_store_registers: td_thr_getfpregs %s"), |
| 550 | td_err_string (val)); |
| 551 | |
| 552 | /* Restore new register value. */ |
| 553 | regcache_raw_supply (regcache, regnum, old_value); |
| 554 | } |
| 555 | |
| 556 | fill_gregset (regcache, (gdb_gregset_t *) &gregset, regnum); |
| 557 | fill_fpregset (regcache, (gdb_fpregset_t *) &fpregset, regnum); |
| 558 | |
| 559 | val = p_td_thr_setgregs (&thandle, gregset); |
| 560 | if (val != TD_OK) |
| 561 | error (_("sol_thread_store_registers: td_thr_setgregs %s"), |
| 562 | td_err_string (val)); |
| 563 | val = p_td_thr_setfpregs (&thandle, &fpregset); |
| 564 | if (val != TD_OK) |
| 565 | error (_("sol_thread_store_registers: td_thr_setfpregs %s"), |
| 566 | td_err_string (val)); |
| 567 | } |
| 568 | |
| 569 | /* Perform partial transfers on OBJECT. See target_read_partial and |
| 570 | target_write_partial for details of each variant. One, and only |
| 571 | one, of readbuf or writebuf must be non-NULL. */ |
| 572 | |
| 573 | static enum target_xfer_status |
| 574 | sol_thread_xfer_partial (struct target_ops *ops, enum target_object object, |
| 575 | const char *annex, gdb_byte *readbuf, |
| 576 | const gdb_byte *writebuf, |
| 577 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) |
| 578 | { |
| 579 | enum target_xfer_status retval; |
| 580 | struct cleanup *old_chain; |
| 581 | struct target_ops *beneath = find_target_beneath (ops); |
| 582 | |
| 583 | old_chain = save_inferior_ptid (); |
| 584 | |
| 585 | if (ptid_tid_p (inferior_ptid) || !target_thread_alive (inferior_ptid)) |
| 586 | { |
| 587 | /* It's either a thread or an LWP that isn't alive. Any live |
| 588 | LWP will do so use the first available. |
| 589 | |
| 590 | NOTE: We don't need to call switch_to_thread; we're just |
| 591 | reading memory. */ |
| 592 | inferior_ptid = procfs_first_available (); |
| 593 | } |
| 594 | |
| 595 | retval = beneath->to_xfer_partial (beneath, object, annex, readbuf, |
| 596 | writebuf, offset, len, xfered_len); |
| 597 | |
| 598 | do_cleanups (old_chain); |
| 599 | |
| 600 | return retval; |
| 601 | } |
| 602 | |
| 603 | static void |
| 604 | check_for_thread_db (void) |
| 605 | { |
| 606 | td_err_e err; |
| 607 | ptid_t ptid; |
| 608 | |
| 609 | /* Don't attempt to use thread_db for remote targets. */ |
| 610 | if (!(target_can_run (¤t_target) || core_bfd)) |
| 611 | return; |
| 612 | |
| 613 | /* Do nothing if we couldn't load libthread_db.so.1. */ |
| 614 | if (p_td_ta_new == NULL) |
| 615 | return; |
| 616 | |
| 617 | if (sol_thread_active) |
| 618 | /* Nothing to do. The thread library was already detected and the |
| 619 | target vector was already activated. */ |
| 620 | return; |
| 621 | |
| 622 | /* Now, initialize libthread_db. This needs to be done after the |
| 623 | shared libraries are located because it needs information from |
| 624 | the user's thread library. */ |
| 625 | |
| 626 | err = p_td_init (); |
| 627 | if (err != TD_OK) |
| 628 | { |
| 629 | warning (_("sol_thread_new_objfile: td_init: %s"), td_err_string (err)); |
| 630 | return; |
| 631 | } |
| 632 | |
| 633 | /* Now attempt to open a connection to the thread library. */ |
| 634 | err = p_td_ta_new (&main_ph, &main_ta); |
| 635 | switch (err) |
| 636 | { |
| 637 | case TD_NOLIBTHREAD: |
| 638 | /* No thread library was detected. */ |
| 639 | break; |
| 640 | |
| 641 | case TD_OK: |
| 642 | printf_unfiltered (_("[Thread debugging using libthread_db enabled]\n")); |
| 643 | |
| 644 | /* The thread library was detected. Activate the sol_thread target. */ |
| 645 | push_target (&sol_thread_ops); |
| 646 | sol_thread_active = 1; |
| 647 | |
| 648 | main_ph.ptid = inferior_ptid; /* Save for xfer_memory. */ |
| 649 | ptid = lwp_to_thread (inferior_ptid); |
| 650 | if (ptid_get_pid (ptid) != -1) |
| 651 | inferior_ptid = ptid; |
| 652 | |
| 653 | target_update_thread_list (); |
| 654 | break; |
| 655 | |
| 656 | default: |
| 657 | warning (_("Cannot initialize thread debugging library: %s"), |
| 658 | td_err_string (err)); |
| 659 | break; |
| 660 | } |
| 661 | } |
| 662 | |
| 663 | /* This routine is called whenever a new symbol table is read in, or |
| 664 | when all symbol tables are removed. libthread_db can only be |
| 665 | initialized when it finds the right variables in libthread.so. |
| 666 | Since it's a shared library, those variables don't show up until |
| 667 | the library gets mapped and the symbol table is read in. */ |
| 668 | |
| 669 | static void |
| 670 | sol_thread_new_objfile (struct objfile *objfile) |
| 671 | { |
| 672 | if (objfile != NULL) |
| 673 | check_for_thread_db (); |
| 674 | } |
| 675 | |
| 676 | /* Clean up after the inferior dies. */ |
| 677 | |
| 678 | static void |
| 679 | sol_thread_mourn_inferior (struct target_ops *ops) |
| 680 | { |
| 681 | struct target_ops *beneath = find_target_beneath (ops); |
| 682 | |
| 683 | sol_thread_active = 0; |
| 684 | |
| 685 | unpush_target (ops); |
| 686 | |
| 687 | beneath->to_mourn_inferior (beneath); |
| 688 | } |
| 689 | |
| 690 | /* Return true if PTID is still active in the inferior. */ |
| 691 | |
| 692 | static int |
| 693 | sol_thread_alive (struct target_ops *ops, ptid_t ptid) |
| 694 | { |
| 695 | if (ptid_tid_p (ptid)) |
| 696 | { |
| 697 | /* It's a (user-level) thread. */ |
| 698 | td_err_e val; |
| 699 | td_thrhandle_t th; |
| 700 | int pid; |
| 701 | |
| 702 | pid = ptid_get_tid (ptid); |
| 703 | if ((val = p_td_ta_map_id2thr (main_ta, pid, &th)) != TD_OK) |
| 704 | return 0; /* Thread not found. */ |
| 705 | if ((val = p_td_thr_validate (&th)) != TD_OK) |
| 706 | return 0; /* Thread not valid. */ |
| 707 | return 1; /* Known thread. */ |
| 708 | } |
| 709 | else |
| 710 | { |
| 711 | struct target_ops *beneath = find_target_beneath (ops); |
| 712 | |
| 713 | /* It's an LPW; pass the request on to the layer below. */ |
| 714 | return beneath->to_thread_alive (beneath, ptid); |
| 715 | } |
| 716 | } |
| 717 | |
| 718 | \f |
| 719 | /* These routines implement the lower half of the thread_db interface, |
| 720 | i.e. the ps_* routines. */ |
| 721 | |
| 722 | /* Various versions of <proc_service.h> have slightly different |
| 723 | function prototypes. In particular, we have |
| 724 | |
| 725 | NEWER OLDER |
| 726 | struct ps_prochandle * const struct ps_prochandle * |
| 727 | void* char* |
| 728 | const void* char* |
| 729 | int size_t |
| 730 | |
| 731 | Which one you have depends on the Solaris version and what patches |
| 732 | you've applied. On the theory that there are only two major |
| 733 | variants, we have configure check the prototype of ps_pdwrite (), |
| 734 | and use that info to make appropriate typedefs here. */ |
| 735 | |
| 736 | #ifdef PROC_SERVICE_IS_OLD |
| 737 | typedef const struct ps_prochandle *gdb_ps_prochandle_t; |
| 738 | typedef char *gdb_ps_read_buf_t; |
| 739 | typedef char *gdb_ps_write_buf_t; |
| 740 | typedef int gdb_ps_size_t; |
| 741 | typedef psaddr_t gdb_ps_addr_t; |
| 742 | #else |
| 743 | typedef struct ps_prochandle *gdb_ps_prochandle_t; |
| 744 | typedef void *gdb_ps_read_buf_t; |
| 745 | typedef const void *gdb_ps_write_buf_t; |
| 746 | typedef size_t gdb_ps_size_t; |
| 747 | typedef psaddr_t gdb_ps_addr_t; |
| 748 | #endif |
| 749 | |
| 750 | /* The next four routines are called by libthread_db to tell us to |
| 751 | stop and stop a particular process or lwp. Since GDB ensures that |
| 752 | these are all stopped by the time we call anything in thread_db, |
| 753 | these routines need to do nothing. */ |
| 754 | |
| 755 | /* Process stop. */ |
| 756 | |
| 757 | ps_err_e |
| 758 | ps_pstop (gdb_ps_prochandle_t ph) |
| 759 | { |
| 760 | return PS_OK; |
| 761 | } |
| 762 | |
| 763 | /* Process continue. */ |
| 764 | |
| 765 | ps_err_e |
| 766 | ps_pcontinue (gdb_ps_prochandle_t ph) |
| 767 | { |
| 768 | return PS_OK; |
| 769 | } |
| 770 | |
| 771 | /* LWP stop. */ |
| 772 | |
| 773 | ps_err_e |
| 774 | ps_lstop (gdb_ps_prochandle_t ph, lwpid_t lwpid) |
| 775 | { |
| 776 | return PS_OK; |
| 777 | } |
| 778 | |
| 779 | /* LWP continue. */ |
| 780 | |
| 781 | ps_err_e |
| 782 | ps_lcontinue (gdb_ps_prochandle_t ph, lwpid_t lwpid) |
| 783 | { |
| 784 | return PS_OK; |
| 785 | } |
| 786 | |
| 787 | /* Looks up the symbol LD_SYMBOL_NAME in the debugger's symbol table. */ |
| 788 | |
| 789 | ps_err_e |
| 790 | ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *ld_object_name, |
| 791 | const char *ld_symbol_name, gdb_ps_addr_t *ld_symbol_addr) |
| 792 | { |
| 793 | struct bound_minimal_symbol ms; |
| 794 | |
| 795 | ms = lookup_minimal_symbol (ld_symbol_name, NULL, NULL); |
| 796 | if (!ms.minsym) |
| 797 | return PS_NOSYM; |
| 798 | |
| 799 | *ld_symbol_addr = BMSYMBOL_VALUE_ADDRESS (ms); |
| 800 | return PS_OK; |
| 801 | } |
| 802 | |
| 803 | /* Common routine for reading and writing memory. */ |
| 804 | |
| 805 | static ps_err_e |
| 806 | rw_common (int dowrite, const struct ps_prochandle *ph, gdb_ps_addr_t addr, |
| 807 | gdb_byte *buf, int size) |
| 808 | { |
| 809 | int ret; |
| 810 | struct cleanup *old_chain; |
| 811 | |
| 812 | old_chain = save_inferior_ptid (); |
| 813 | |
| 814 | if (ptid_tid_p (inferior_ptid) || !target_thread_alive (inferior_ptid)) |
| 815 | { |
| 816 | /* It's either a thread or an LWP that isn't alive. Any live |
| 817 | LWP will do so use the first available. |
| 818 | |
| 819 | NOTE: We don't need to call switch_to_thread; we're just |
| 820 | reading memory. */ |
| 821 | inferior_ptid = procfs_first_available (); |
| 822 | } |
| 823 | |
| 824 | #if defined (__sparcv9) |
| 825 | /* For Sparc64 cross Sparc32, make sure the address has not been |
| 826 | accidentally sign-extended (or whatever) to beyond 32 bits. */ |
| 827 | if (bfd_get_arch_size (exec_bfd) == 32) |
| 828 | addr &= 0xffffffff; |
| 829 | #endif |
| 830 | |
| 831 | if (dowrite) |
| 832 | ret = target_write_memory (addr, (gdb_byte *) buf, size); |
| 833 | else |
| 834 | ret = target_read_memory (addr, (gdb_byte *) buf, size); |
| 835 | |
| 836 | do_cleanups (old_chain); |
| 837 | |
| 838 | return (ret == 0 ? PS_OK : PS_ERR); |
| 839 | } |
| 840 | |
| 841 | /* Copies SIZE bytes from target process .data segment to debugger memory. */ |
| 842 | |
| 843 | ps_err_e |
| 844 | ps_pdread (gdb_ps_prochandle_t ph, gdb_ps_addr_t addr, |
| 845 | gdb_ps_read_buf_t buf, gdb_ps_size_t size) |
| 846 | { |
| 847 | return rw_common (0, ph, addr, (gdb_byte *) buf, size); |
| 848 | } |
| 849 | |
| 850 | /* Copies SIZE bytes from debugger memory .data segment to target process. */ |
| 851 | |
| 852 | ps_err_e |
| 853 | ps_pdwrite (gdb_ps_prochandle_t ph, gdb_ps_addr_t addr, |
| 854 | gdb_ps_write_buf_t buf, gdb_ps_size_t size) |
| 855 | { |
| 856 | return rw_common (1, ph, addr, (gdb_byte *) buf, size); |
| 857 | } |
| 858 | |
| 859 | /* Copies SIZE bytes from target process .text segment to debugger memory. */ |
| 860 | |
| 861 | ps_err_e |
| 862 | ps_ptread (gdb_ps_prochandle_t ph, gdb_ps_addr_t addr, |
| 863 | gdb_ps_read_buf_t buf, gdb_ps_size_t size) |
| 864 | { |
| 865 | return rw_common (0, ph, addr, (gdb_byte *) buf, size); |
| 866 | } |
| 867 | |
| 868 | /* Copies SIZE bytes from debugger memory .text segment to target process. */ |
| 869 | |
| 870 | ps_err_e |
| 871 | ps_ptwrite (gdb_ps_prochandle_t ph, gdb_ps_addr_t addr, |
| 872 | gdb_ps_write_buf_t buf, gdb_ps_size_t size) |
| 873 | { |
| 874 | return rw_common (1, ph, addr, (gdb_byte *) buf, size); |
| 875 | } |
| 876 | |
| 877 | /* Get general-purpose registers for LWP. */ |
| 878 | |
| 879 | ps_err_e |
| 880 | ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset) |
| 881 | { |
| 882 | struct cleanup *old_chain; |
| 883 | struct regcache *regcache; |
| 884 | |
| 885 | old_chain = save_inferior_ptid (); |
| 886 | |
| 887 | inferior_ptid = ptid_build (ptid_get_pid (inferior_ptid), lwpid, 0); |
| 888 | regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch ()); |
| 889 | |
| 890 | target_fetch_registers (regcache, -1); |
| 891 | fill_gregset (regcache, (gdb_gregset_t *) gregset, -1); |
| 892 | |
| 893 | do_cleanups (old_chain); |
| 894 | |
| 895 | return PS_OK; |
| 896 | } |
| 897 | |
| 898 | /* Set general-purpose registers for LWP. */ |
| 899 | |
| 900 | ps_err_e |
| 901 | ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, |
| 902 | const prgregset_t gregset) |
| 903 | { |
| 904 | struct cleanup *old_chain; |
| 905 | struct regcache *regcache; |
| 906 | |
| 907 | old_chain = save_inferior_ptid (); |
| 908 | |
| 909 | inferior_ptid = ptid_build (ptid_get_pid (inferior_ptid), lwpid, 0); |
| 910 | regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch ()); |
| 911 | |
| 912 | supply_gregset (regcache, (const gdb_gregset_t *) gregset); |
| 913 | target_store_registers (regcache, -1); |
| 914 | |
| 915 | do_cleanups (old_chain); |
| 916 | |
| 917 | return PS_OK; |
| 918 | } |
| 919 | |
| 920 | /* Log a message (sends to gdb_stderr). */ |
| 921 | |
| 922 | void |
| 923 | ps_plog (const char *fmt, ...) |
| 924 | { |
| 925 | va_list args; |
| 926 | |
| 927 | va_start (args, fmt); |
| 928 | |
| 929 | vfprintf_filtered (gdb_stderr, fmt, args); |
| 930 | } |
| 931 | |
| 932 | /* Get size of extra register set. Currently a noop. */ |
| 933 | |
| 934 | ps_err_e |
| 935 | ps_lgetxregsize (gdb_ps_prochandle_t ph, lwpid_t lwpid, int *xregsize) |
| 936 | { |
| 937 | return PS_OK; |
| 938 | } |
| 939 | |
| 940 | /* Get extra register set. Currently a noop. */ |
| 941 | |
| 942 | ps_err_e |
| 943 | ps_lgetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset) |
| 944 | { |
| 945 | return PS_OK; |
| 946 | } |
| 947 | |
| 948 | /* Set extra register set. Currently a noop. */ |
| 949 | |
| 950 | ps_err_e |
| 951 | ps_lsetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset) |
| 952 | { |
| 953 | return PS_OK; |
| 954 | } |
| 955 | |
| 956 | /* Get floating-point registers for LWP. */ |
| 957 | |
| 958 | ps_err_e |
| 959 | ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, |
| 960 | prfpregset_t *fpregset) |
| 961 | { |
| 962 | struct cleanup *old_chain; |
| 963 | struct regcache *regcache; |
| 964 | |
| 965 | old_chain = save_inferior_ptid (); |
| 966 | |
| 967 | inferior_ptid = ptid_build (ptid_get_pid (inferior_ptid), lwpid, 0); |
| 968 | regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch ()); |
| 969 | |
| 970 | target_fetch_registers (regcache, -1); |
| 971 | fill_fpregset (regcache, (gdb_fpregset_t *) fpregset, -1); |
| 972 | |
| 973 | do_cleanups (old_chain); |
| 974 | |
| 975 | return PS_OK; |
| 976 | } |
| 977 | |
| 978 | /* Set floating-point regs for LWP. */ |
| 979 | |
| 980 | ps_err_e |
| 981 | ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, |
| 982 | const prfpregset_t * fpregset) |
| 983 | { |
| 984 | struct cleanup *old_chain; |
| 985 | struct regcache *regcache; |
| 986 | |
| 987 | old_chain = save_inferior_ptid (); |
| 988 | |
| 989 | inferior_ptid = ptid_build (ptid_get_pid (inferior_ptid), lwpid, 0); |
| 990 | regcache = get_thread_arch_regcache (inferior_ptid, target_gdbarch ()); |
| 991 | |
| 992 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregset); |
| 993 | target_store_registers (regcache, -1); |
| 994 | |
| 995 | do_cleanups (old_chain); |
| 996 | |
| 997 | return PS_OK; |
| 998 | } |
| 999 | |
| 1000 | #ifdef PR_MODEL_LP64 |
| 1001 | /* Identify process as 32-bit or 64-bit. At the moment we're using |
| 1002 | BFD to do this. There might be a more Solaris-specific |
| 1003 | (e.g. procfs) method, but this ought to work. */ |
| 1004 | |
| 1005 | ps_err_e |
| 1006 | ps_pdmodel (gdb_ps_prochandle_t ph, int *data_model) |
| 1007 | { |
| 1008 | if (exec_bfd == 0) |
| 1009 | *data_model = PR_MODEL_UNKNOWN; |
| 1010 | else if (bfd_get_arch_size (exec_bfd) == 32) |
| 1011 | *data_model = PR_MODEL_ILP32; |
| 1012 | else |
| 1013 | *data_model = PR_MODEL_LP64; |
| 1014 | |
| 1015 | return PS_OK; |
| 1016 | } |
| 1017 | #endif /* PR_MODEL_LP64 */ |
| 1018 | |
| 1019 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
| 1020 | |
| 1021 | /* Reads the local descriptor table of a LWP. |
| 1022 | |
| 1023 | This function is necessary on x86-solaris only. Without it, the loading |
| 1024 | of libthread_db would fail because of ps_lgetLDT being undefined. */ |
| 1025 | |
| 1026 | ps_err_e |
| 1027 | ps_lgetLDT (gdb_ps_prochandle_t ph, lwpid_t lwpid, |
| 1028 | struct ssd *pldt) |
| 1029 | { |
| 1030 | /* NOTE: only used on Solaris, therefore OK to refer to procfs.c. */ |
| 1031 | struct ssd *ret; |
| 1032 | |
| 1033 | /* FIXME: can't I get the process ID from the prochandle or |
| 1034 | something? */ |
| 1035 | |
| 1036 | if (ptid_get_pid (inferior_ptid) <= 0 || lwpid <= 0) |
| 1037 | return PS_BADLID; |
| 1038 | |
| 1039 | ret = procfs_find_LDT_entry (ptid_build (ptid_get_pid (inferior_ptid), |
| 1040 | lwpid, 0)); |
| 1041 | if (ret) |
| 1042 | { |
| 1043 | memcpy (pldt, ret, sizeof (struct ssd)); |
| 1044 | return PS_OK; |
| 1045 | } |
| 1046 | else |
| 1047 | /* LDT not found. */ |
| 1048 | return PS_ERR; |
| 1049 | } |
| 1050 | #endif |
| 1051 | \f |
| 1052 | |
| 1053 | /* Convert PTID to printable form. */ |
| 1054 | |
| 1055 | static char * |
| 1056 | solaris_pid_to_str (struct target_ops *ops, ptid_t ptid) |
| 1057 | { |
| 1058 | static char buf[100]; |
| 1059 | |
| 1060 | if (ptid_tid_p (ptid)) |
| 1061 | { |
| 1062 | ptid_t lwp; |
| 1063 | |
| 1064 | lwp = thread_to_lwp (ptid, -2); |
| 1065 | |
| 1066 | if (ptid_get_pid (lwp) == -1) |
| 1067 | xsnprintf (buf, sizeof (buf), "Thread %ld (defunct)", |
| 1068 | ptid_get_tid (ptid)); |
| 1069 | else if (ptid_get_pid (lwp) != -2) |
| 1070 | xsnprintf (buf, sizeof (buf), "Thread %ld (LWP %ld)", |
| 1071 | ptid_get_tid (ptid), ptid_get_lwp (lwp)); |
| 1072 | else |
| 1073 | xsnprintf (buf, sizeof (buf), "Thread %ld ", |
| 1074 | ptid_get_tid (ptid)); |
| 1075 | } |
| 1076 | else if (ptid_get_lwp (ptid) != 0) |
| 1077 | xsnprintf (buf, sizeof (buf), "LWP %ld ", ptid_get_lwp (ptid)); |
| 1078 | else |
| 1079 | xsnprintf (buf, sizeof (buf), "process %d ", ptid_get_pid (ptid)); |
| 1080 | |
| 1081 | return buf; |
| 1082 | } |
| 1083 | \f |
| 1084 | |
| 1085 | /* Worker bee for update_thread_list. Callback function that gets |
| 1086 | called once per user-level thread (i.e. not for LWP's). */ |
| 1087 | |
| 1088 | static int |
| 1089 | sol_update_thread_list_callback (const td_thrhandle_t *th, void *ignored) |
| 1090 | { |
| 1091 | td_err_e retval; |
| 1092 | td_thrinfo_t ti; |
| 1093 | ptid_t ptid; |
| 1094 | |
| 1095 | retval = p_td_thr_get_info (th, &ti); |
| 1096 | if (retval != TD_OK) |
| 1097 | return -1; |
| 1098 | |
| 1099 | ptid = ptid_build (ptid_get_pid (inferior_ptid), 0, ti.ti_tid); |
| 1100 | if (!in_thread_list (ptid) || is_exited (ptid)) |
| 1101 | add_thread (ptid); |
| 1102 | |
| 1103 | return 0; |
| 1104 | } |
| 1105 | |
| 1106 | static void |
| 1107 | sol_update_thread_list (struct target_ops *ops) |
| 1108 | { |
| 1109 | struct target_ops *beneath = find_target_beneath (ops); |
| 1110 | |
| 1111 | /* Delete dead threads. */ |
| 1112 | prune_threads (); |
| 1113 | |
| 1114 | /* Find any new LWP's. */ |
| 1115 | beneath->to_update_thread_list (beneath); |
| 1116 | |
| 1117 | /* Then find any new user-level threads. */ |
| 1118 | p_td_ta_thr_iter (main_ta, sol_update_thread_list_callback, (void *) 0, |
| 1119 | TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY, |
| 1120 | TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS); |
| 1121 | } |
| 1122 | |
| 1123 | /* Worker bee for the "info sol-thread" command. This is a callback |
| 1124 | function that gets called once for each Solaris user-level thread |
| 1125 | (i.e. not for LWPs) in the inferior. Print anything interesting |
| 1126 | that we can think of. */ |
| 1127 | |
| 1128 | static int |
| 1129 | info_cb (const td_thrhandle_t *th, void *s) |
| 1130 | { |
| 1131 | td_err_e ret; |
| 1132 | td_thrinfo_t ti; |
| 1133 | |
| 1134 | ret = p_td_thr_get_info (th, &ti); |
| 1135 | if (ret == TD_OK) |
| 1136 | { |
| 1137 | printf_filtered ("%s thread #%d, lwp %d, ", |
| 1138 | ti.ti_type == TD_THR_SYSTEM ? "system" : "user ", |
| 1139 | ti.ti_tid, ti.ti_lid); |
| 1140 | switch (ti.ti_state) |
| 1141 | { |
| 1142 | default: |
| 1143 | case TD_THR_UNKNOWN: |
| 1144 | printf_filtered ("<unknown state>"); |
| 1145 | break; |
| 1146 | case TD_THR_STOPPED: |
| 1147 | printf_filtered ("(stopped)"); |
| 1148 | break; |
| 1149 | case TD_THR_RUN: |
| 1150 | printf_filtered ("(run) "); |
| 1151 | break; |
| 1152 | case TD_THR_ACTIVE: |
| 1153 | printf_filtered ("(active) "); |
| 1154 | break; |
| 1155 | case TD_THR_ZOMBIE: |
| 1156 | printf_filtered ("(zombie) "); |
| 1157 | break; |
| 1158 | case TD_THR_SLEEP: |
| 1159 | printf_filtered ("(asleep) "); |
| 1160 | break; |
| 1161 | case TD_THR_STOPPED_ASLEEP: |
| 1162 | printf_filtered ("(stopped asleep)"); |
| 1163 | break; |
| 1164 | } |
| 1165 | /* Print thr_create start function. */ |
| 1166 | if (ti.ti_startfunc != 0) |
| 1167 | { |
| 1168 | const struct bound_minimal_symbol msym |
| 1169 | = lookup_minimal_symbol_by_pc (ti.ti_startfunc); |
| 1170 | |
| 1171 | printf_filtered (" startfunc=%s", |
| 1172 | msym.minsym |
| 1173 | ? MSYMBOL_PRINT_NAME (msym.minsym) |
| 1174 | : paddress (target_gdbarch (), ti.ti_startfunc)); |
| 1175 | } |
| 1176 | |
| 1177 | /* If thread is asleep, print function that went to sleep. */ |
| 1178 | if (ti.ti_state == TD_THR_SLEEP) |
| 1179 | { |
| 1180 | const struct bound_minimal_symbol msym |
| 1181 | = lookup_minimal_symbol_by_pc (ti.ti_pc); |
| 1182 | |
| 1183 | printf_filtered (" sleepfunc=%s", |
| 1184 | msym.minsym |
| 1185 | ? MSYMBOL_PRINT_NAME (msym.minsym) |
| 1186 | : paddress (target_gdbarch (), ti.ti_pc)); |
| 1187 | } |
| 1188 | |
| 1189 | printf_filtered ("\n"); |
| 1190 | } |
| 1191 | else |
| 1192 | warning (_("info sol-thread: failed to get info for thread.")); |
| 1193 | |
| 1194 | return 0; |
| 1195 | } |
| 1196 | |
| 1197 | /* List some state about each Solaris user-level thread in the |
| 1198 | inferior. */ |
| 1199 | |
| 1200 | static void |
| 1201 | info_solthreads (char *args, int from_tty) |
| 1202 | { |
| 1203 | p_td_ta_thr_iter (main_ta, info_cb, args, |
| 1204 | TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY, |
| 1205 | TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS); |
| 1206 | } |
| 1207 | |
| 1208 | /* Callback routine used to find a thread based on the TID part of |
| 1209 | its PTID. */ |
| 1210 | |
| 1211 | static int |
| 1212 | thread_db_find_thread_from_tid (struct thread_info *thread, void *data) |
| 1213 | { |
| 1214 | long *tid = (long *) data; |
| 1215 | |
| 1216 | if (ptid_get_tid (thread->ptid) == *tid) |
| 1217 | return 1; |
| 1218 | |
| 1219 | return 0; |
| 1220 | } |
| 1221 | |
| 1222 | static ptid_t |
| 1223 | sol_get_ada_task_ptid (struct target_ops *self, long lwp, long thread) |
| 1224 | { |
| 1225 | struct thread_info *thread_info = |
| 1226 | iterate_over_threads (thread_db_find_thread_from_tid, &thread); |
| 1227 | |
| 1228 | if (thread_info == NULL) |
| 1229 | { |
| 1230 | /* The list of threads is probably not up to date. Find any |
| 1231 | thread that is missing from the list, and try again. */ |
| 1232 | sol_update_thread_list (¤t_target); |
| 1233 | thread_info = iterate_over_threads (thread_db_find_thread_from_tid, |
| 1234 | &thread); |
| 1235 | } |
| 1236 | |
| 1237 | gdb_assert (thread_info != NULL); |
| 1238 | |
| 1239 | return (thread_info->ptid); |
| 1240 | } |
| 1241 | |
| 1242 | static void |
| 1243 | init_sol_thread_ops (void) |
| 1244 | { |
| 1245 | sol_thread_ops.to_shortname = "solaris-threads"; |
| 1246 | sol_thread_ops.to_longname = "Solaris threads and pthread."; |
| 1247 | sol_thread_ops.to_doc = "Solaris threads and pthread support."; |
| 1248 | sol_thread_ops.to_detach = sol_thread_detach; |
| 1249 | sol_thread_ops.to_resume = sol_thread_resume; |
| 1250 | sol_thread_ops.to_wait = sol_thread_wait; |
| 1251 | sol_thread_ops.to_fetch_registers = sol_thread_fetch_registers; |
| 1252 | sol_thread_ops.to_store_registers = sol_thread_store_registers; |
| 1253 | sol_thread_ops.to_xfer_partial = sol_thread_xfer_partial; |
| 1254 | sol_thread_ops.to_mourn_inferior = sol_thread_mourn_inferior; |
| 1255 | sol_thread_ops.to_thread_alive = sol_thread_alive; |
| 1256 | sol_thread_ops.to_pid_to_str = solaris_pid_to_str; |
| 1257 | sol_thread_ops.to_update_thread_list = sol_update_thread_list; |
| 1258 | sol_thread_ops.to_stratum = thread_stratum; |
| 1259 | sol_thread_ops.to_get_ada_task_ptid = sol_get_ada_task_ptid; |
| 1260 | sol_thread_ops.to_magic = OPS_MAGIC; |
| 1261 | } |
| 1262 | |
| 1263 | /* Silence -Wmissing-prototypes. */ |
| 1264 | extern void _initialize_sol_thread (void); |
| 1265 | |
| 1266 | void |
| 1267 | _initialize_sol_thread (void) |
| 1268 | { |
| 1269 | void *dlhandle; |
| 1270 | |
| 1271 | init_sol_thread_ops (); |
| 1272 | |
| 1273 | dlhandle = dlopen ("libthread_db.so.1", RTLD_NOW); |
| 1274 | if (!dlhandle) |
| 1275 | goto die; |
| 1276 | |
| 1277 | #define resolve(X) \ |
| 1278 | if (!(p_##X = (X ## _ftype *) dlsym (dlhandle, #X))) \ |
| 1279 | goto die; |
| 1280 | |
| 1281 | resolve (td_log); |
| 1282 | resolve (td_ta_new); |
| 1283 | resolve (td_ta_delete); |
| 1284 | resolve (td_init); |
| 1285 | resolve (td_ta_get_ph); |
| 1286 | resolve (td_ta_get_nthreads); |
| 1287 | resolve (td_ta_tsd_iter); |
| 1288 | resolve (td_ta_thr_iter); |
| 1289 | resolve (td_thr_validate); |
| 1290 | resolve (td_thr_tsd); |
| 1291 | resolve (td_thr_get_info); |
| 1292 | resolve (td_thr_getfpregs); |
| 1293 | resolve (td_thr_getxregsize); |
| 1294 | resolve (td_thr_getxregs); |
| 1295 | resolve (td_thr_sigsetmask); |
| 1296 | resolve (td_thr_setprio); |
| 1297 | resolve (td_thr_setsigpending); |
| 1298 | resolve (td_thr_setfpregs); |
| 1299 | resolve (td_thr_setxregs); |
| 1300 | resolve (td_ta_map_id2thr); |
| 1301 | resolve (td_ta_map_lwp2thr); |
| 1302 | resolve (td_thr_getgregs); |
| 1303 | resolve (td_thr_setgregs); |
| 1304 | |
| 1305 | complete_target_initialization (&sol_thread_ops); |
| 1306 | |
| 1307 | add_cmd ("sol-threads", class_maintenance, info_solthreads, |
| 1308 | _("Show info on Solaris user threads."), &maintenanceinfolist); |
| 1309 | |
| 1310 | /* Hook into new_objfile notification. */ |
| 1311 | observer_attach_new_objfile (sol_thread_new_objfile); |
| 1312 | return; |
| 1313 | |
| 1314 | die: |
| 1315 | fprintf_unfiltered (gdb_stderr, "\ |
| 1316 | [GDB will not be able to debug user-mode threads: %s]\n", dlerror ()); |
| 1317 | |
| 1318 | if (dlhandle) |
| 1319 | dlclose (dlhandle); |
| 1320 | |
| 1321 | return; |
| 1322 | } |