gdb/gdb_thread_db.h

   1 #ifdef HAVE_THREAD_DB_H
   2 #include <thread_db.h>
   3 #else
   4
   5 #ifdef HAVE_STDINT_H
   6 #include <stdint.h>
   7 typedef uint32_t gdb_uint32_t;
   8 #define GDB_UINT32_C(c) UINT32_C(c)
   9 #else
  10 typedef unsigned int gdb_uint32_t;
  11 #define GDB_UINT32_C(c) c ## U
  12 #endif
  13
  14 /* Copyright (C) 1999, 2000, 2007, 2008 Free Software Foundation, Inc.
  15    This file is part of the GNU C Library.
  16
  17    The GNU C Library is free software; you can redistribute it and/or
  18    modify it under the terms of the GNU Library General Public License as
  19    published by the Free Software Foundation; either version 2 of the
  20    License, or (at your option) any later version.
  21
  22    The GNU C Library is distributed in the hope that it will be useful,
  23    but WITHOUT ANY WARRANTY; without even the implied warranty of
  24    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  25    Library General Public License for more details.
  26
  27    You should have received a copy of the GNU Library General Public
  28    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  29    write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  30    Boston, MA 02110-1301, USA.  */
  31
  32 #ifndef _THREAD_DB_H
  33 #define _THREAD_DB_H    1
  34
  35 /* This is the debugger interface for the LinuxThreads library.  It is
  36    modelled closely after the interface with same names in Solaris with
  37    the goal to share the same code in the debugger.  */
  38 #include <pthread.h>
  39 #include <sys/types.h>
  40 #include <sys/procfs.h>
  41
  42
  43 /* Error codes of the library.  */
  44 typedef enum
  45 {
  46   TD_OK,          /* No error.  */
  47   TD_ERR,         /* No further specified error.  */
  48   TD_NOTHR,       /* No matching thread found.  */
  49   TD_NOSV,        /* No matching synchronization handle found.  */
  50   TD_NOLWP,       /* No matching light-weighted process found.  */
  51   TD_BADPH,       /* Invalid process handle.  */
  52   TD_BADTH,       /* Invalid thread handle.  */
  53   TD_BADSH,       /* Invalid synchronization handle.  */
  54   TD_BADTA,       /* Invalid thread agent.  */
  55   TD_BADKEY,      /* Invalid key.  */
  56   TD_NOMSG,       /* No event available.  */
  57   TD_NOFPREGS,    /* No floating-point register content available.  */
  58   TD_NOLIBTHREAD, /* Application not linked with thread library.  */
  59   TD_NOEVENT,     /* Requested event is not supported.  */
  60   TD_NOCAPAB,     /* Capability not available.  */
  61   TD_DBERR,       /* Internal debug library error.  */
  62   TD_NOAPLIC,     /* Operation is not applicable.  */
  63   TD_NOTSD,       /* No thread-specific data available.  */
  64   TD_MALLOC,      /* Out of memory.  */
  65   TD_PARTIALREG,  /* Not entire register set was read or written.  */
  66   TD_NOXREGS,     /* X register set not available for given thread.  */
  67   TD_NOTALLOC     /* TLS memory not yet allocated.  */
  68 } td_err_e;
  69
  70
  71 /* Possible thread states.  TD_THR_ANY_STATE is a pseudo-state used to
  72    select threads regardless of state in td_ta_thr_iter().  */
  73 typedef enum
  74 {
  75   TD_THR_ANY_STATE,
  76   TD_THR_UNKNOWN,
  77   TD_THR_STOPPED,
  78   TD_THR_RUN,
  79   TD_THR_ACTIVE,
  80   TD_THR_ZOMBIE,
  81   TD_THR_SLEEP,
  82   TD_THR_STOPPED_ASLEEP
  83 } td_thr_state_e;
  84
  85 /* Thread type: user or system.  TD_THR_ANY_TYPE is a pseudo-type used
  86    to select threads regardless of type in td_ta_thr_iter().  */
  87 typedef enum
  88 {
  89   TD_THR_ANY_TYPE,
  90   TD_THR_USER,
  91   TD_THR_SYSTEM
  92 } td_thr_type_e;
  93
  94
  95 /* Types of the debugging library.  */
  96
  97 /* Handle for a process.  This type is opaque.  */
  98 typedef struct td_thragent td_thragent_t;
  99
 100 /* The actual thread handle type.  This is also opaque.  */
 101 typedef struct td_thrhandle
 102 {
 103   td_thragent_t *th_ta_p;
 104   psaddr_t th_unique;
 105 } td_thrhandle_t;
 106
 107
 108 /* Flags for `td_ta_thr_iter'.  */
 109 #define TD_THR_ANY_USER_FLAGS   0xffffffff
 110 #define TD_THR_LOWEST_PRIORITY  -20
 111 #define TD_SIGNO_MASK           NULL
 112
 113
 114 #define TD_EVENTSIZE    2
 115 #define BT_UISHIFT      5 /* log base 2 of BT_NBIPUI, to extract word index */
 116 #define BT_NBIPUI       (1 << BT_UISHIFT)       /* n bits per uint */
 117 #define BT_UIMASK       (BT_NBIPUI - 1)         /* to extract bit index */
 118
 119 /* Bitmask of enabled events. */
 120 typedef struct td_thr_events
 121 {
 122   gdb_uint32_t event_bits[TD_EVENTSIZE];
 123 } td_thr_events_t;
 124
 125 /* Event set manipulation macros. */
 126 #define __td_eventmask(n) \
 127   (GDB_UINT32_C (1) << (((n) - 1) & BT_UIMASK))
 128 #define __td_eventword(n) \
 129   ((GDB_UINT32_C ((n) - 1)) >> BT_UISHIFT)
 130
 131 #define td_event_emptyset(setp) \
 132   do {                                                                        \
 133     int __i;                                                                  \
 134     for (__i = TD_EVENTSIZE; __i > 0; --__i)                                  \
 135       (setp)->event_bits[__i - 1] = 0;                                        \
 136   } while (0)
 137
 138 #define td_event_fillset(setp) \
 139   do {                                                                        \
 140     int __i;                                                                  \
 141     for (__i = TD_EVENTSIZE; __i > 0; --__i)                                  \
 142       (setp)->event_bits[__i - 1] = GDB_UINT32_C (0xffffffff);                \
 143   } while (0)
 144
 145 #define td_event_addset(setp, n) \
 146   (((setp)->event_bits[__td_eventword (n)]) |= __td_eventmask (n))
 147 #define td_event_delset(setp, n) \
 148   (((setp)->event_bits[__td_eventword (n)]) &= ~__td_eventmask (n))
 149 #define td_eventismember(setp, n) \
 150   (__td_eventmask (n) & ((setp)->event_bits[__td_eventword (n)]))
 151 #if TD_EVENTSIZE == 2
 152 # define td_eventisempty(setp) \
 153   (!((setp)->event_bits[0]) && !((setp)->event_bits[1]))
 154 #else
 155 # error "td_eventisempty must be changed to match TD_EVENTSIZE"
 156 #endif
 157
 158 /* Events reportable by the thread implementation.  */
 159 typedef enum
 160 {
 161   TD_ALL_EVENTS,                 /* Pseudo-event number.  */
 162   TD_EVENT_NONE = TD_ALL_EVENTS, /* Depends on context.  */
 163   TD_READY,                      /* Is executable now. */
 164   TD_SLEEP,                      /* Blocked in a synchronization obj.  */
 165   TD_SWITCHTO,                   /* Now assigned to a process.  */
 166   TD_SWITCHFROM,                 /* Not anymore assigned to a process.  */
 167   TD_LOCK_TRY,                   /* Trying to get an unavailable lock.  */
 168   TD_CATCHSIG,                   /* Signal posted to the thread.  */
 169   TD_IDLE,                       /* Process getting idle.  */
 170   TD_CREATE,                     /* New thread created.  */
 171   TD_DEATH,                      /* Thread terminated.  */
 172   TD_PREEMPT,                    /* Preempted.  */
 173   TD_PRI_INHERIT,                /* Inherited elevated priority.  */
 174   TD_REAP,                       /* Reaped.  */
 175   TD_CONCURRENCY,                /* Number of processes changing.  */
 176   TD_TIMEOUT,                    /* Conditional variable wait timed out.  */
 177   TD_MIN_EVENT_NUM = TD_READY,
 178   TD_MAX_EVENT_NUM = TD_TIMEOUT,
 179   TD_EVENTS_ENABLE = 31         /* Event reporting enabled.  */
 180 } td_event_e;
 181
 182 /* Values representing the different ways events are reported.  */
 183 typedef enum
 184 {
 185   NOTIFY_BPT,                   /* User must insert breakpoint at u.bptaddr. */
 186   NOTIFY_AUTOBPT,               /* Breakpoint at u.bptaddr is automatically
 187                                    inserted.  */
 188   NOTIFY_SYSCALL                /* System call u.syscallno will be invoked.  */
 189 } td_notify_e;
 190
 191 /* Description how event type is reported.  */
 192 typedef struct td_notify
 193 {
 194   td_notify_e type;             /* Way the event is reported.  */
 195   union
 196   {
 197     psaddr_t bptaddr;           /* Address of breakpoint.  */
 198     int syscallno;              /* Number of system call used.  */
 199   } u;
 200 } td_notify_t;
 201
 202 /* Some people still have libc5 or old glibc with no uintptr_t.
 203    They lose.  glibc 2.1.3 was released on 2000-02-25, and it has
 204    uintptr_t, so it's reasonable to force these people to upgrade.  */
 205
 206 #ifndef HAVE_UINTPTR_T
 207 #error No uintptr_t available; your C library is too old.
 208 /* Inhibit further compilation errors after this error.  */
 209 #define uintptr_t void *
 210 #endif
 211
 212 /* Structure used to report event.  */
 213 typedef struct td_event_msg
 214 {
 215   td_event_e event;             /* Event type being reported.  */
 216   const td_thrhandle_t *th_p;   /* Thread reporting the event.  */
 217   union
 218   {
 219 #if 0
 220     td_synchandle_t *sh;        /* Handle of synchronization object.  */
 221 #endif
 222     uintptr_t data;             /* Event specific data.  */
 223   } msg;
 224 } td_event_msg_t;
 225
 226 /* Structure containing event data available in each thread structure.  */
 227 typedef struct
 228 {
 229   td_thr_events_t eventmask;    /* Mask of enabled events.  */
 230   td_event_e eventnum;          /* Number of last event.  */
 231   void *eventdata;              /* Data associated with event.  */
 232 } td_eventbuf_t;
 233
 234
 235 /* Gathered statistics about the process.  */
 236 typedef struct td_ta_stats
 237 {
 238   int nthreads;                 /* Total number of threads in use.  */
 239   int r_concurrency;            /* Concurrency level requested by user.  */
 240   int nrunnable_num;            /* Average runnable threads, numerator.  */
 241   int nrunnable_den;            /* Average runnable threads, denominator.  */
 242   int a_concurrency_num;        /* Achieved concurrency level, numerator.  */
 243   int a_concurrency_den;        /* Achieved concurrency level, denominator.  */
 244   int nlwps_num;                /* Average number of processes in use,
 245                                    numerator.  */
 246   int nlwps_den;                /* Average number of processes in use,
 247                                    denominator.  */
 248   int nidle_num;                /* Average number of idling processes,
 249                                    numerator.  */
 250   int nidle_den;                /* Average number of idling processes,
 251                                    denominator.  */
 252 } td_ta_stats_t;
 253
 254
 255 /* Since Sun's library is based on Solaris threads we have to define a few
 256    types to map them to POSIX threads.  */
 257 typedef pthread_t thread_t;
 258 typedef pthread_key_t thread_key_t;
 259
 260
 261 /* Callback for iteration over threads.  */
 262 typedef int td_thr_iter_f (const td_thrhandle_t *, void *);
 263
 264 /* Callback for iteration over thread local data.  */
 265 typedef int td_key_iter_f (thread_key_t, void (*) (void *), void *);
 266
 267
 268
 269 /* Forward declaration.  This has to be defined by the user.  */
 270 struct ps_prochandle;
 271
 272
 273 /* Information about the thread.  */
 274 typedef struct td_thrinfo
 275 {
 276   td_thragent_t *ti_ta_p;               /* Process handle.  */
 277   unsigned int ti_user_flags;           /* Unused.  */
 278   thread_t ti_tid;                      /* Thread ID returned by
 279                                            pthread_create().  */
 280   char *ti_tls;                         /* Pointer to thread-local data.  */
 281   psaddr_t ti_startfunc;                /* Start function passed to
 282                                            pthread_create().  */
 283   psaddr_t ti_stkbase;                  /* Base of thread's stack.  */
 284   long int ti_stksize;                  /* Size of thread's stack.  */
 285   psaddr_t ti_ro_area;                  /* Unused.  */
 286   int ti_ro_size;                       /* Unused.  */
 287   td_thr_state_e ti_state;              /* Thread state.  */
 288   unsigned char ti_db_suspended;        /* Nonzero if suspended by debugger. */
 289   td_thr_type_e ti_type;                /* Type of the thread (system vs
 290                                            user thread).  */
 291   intptr_t ti_pc;                       /* Unused.  */
 292   intptr_t ti_sp;                       /* Unused.  */
 293   short int ti_flags;                   /* Unused.  */
 294   int ti_pri;                           /* Thread priority.  */
 295   lwpid_t ti_lid;                       /* Kernel pid for this thread.  */
 296   sigset_t ti_sigmask;                  /* Signal mask.  */
 297   unsigned char ti_traceme;             /* Nonzero if event reporting
 298                                            enabled.  */
 299   unsigned char ti_preemptflag;         /* Unused.  */
 300   unsigned char ti_pirecflag;           /* Unused.  */
 301   sigset_t ti_pending;                  /* Set of pending signals.  */
 302   td_thr_events_t ti_events;            /* Set of enabled events.  */
 303 } td_thrinfo_t;
 304
 305
 306
 307 /* Prototypes for exported library functions.  */
 308
 309 /* Initialize the thread debug support library.  */
 310 extern td_err_e td_init (void);
 311
 312 /* Historical relict.  Should not be used anymore.  */
 313 extern td_err_e td_log (void);
 314
 315 /* Generate new thread debug library handle for process PS.  */
 316 extern td_err_e td_ta_new (struct ps_prochandle *__ps, td_thragent_t **__ta);
 317
 318 /* Free resources allocated for TA.  */
 319 extern td_err_e td_ta_delete (td_thragent_t *__ta);
 320
 321 /* Get number of currently running threads in process associated with TA.  */
 322 extern td_err_e td_ta_get_nthreads (const td_thragent_t *__ta, int *__np);
 323
 324 /* Return process handle passed in `td_ta_new' for process associated with
 325    TA.  */
 326 extern td_err_e td_ta_get_ph (const td_thragent_t *__ta,
 327                               struct ps_prochandle **__ph);
 328
 329 /* Map thread library handle PT to thread debug library handle for process
 330    associated with TA and store result in *TH.  */
 331 extern td_err_e td_ta_map_id2thr (const td_thragent_t *__ta, pthread_t __pt,
 332                                   td_thrhandle_t *__th);
 333
 334 /* Map process ID LWPID to thread debug library handle for process
 335    associated with TA and store result in *TH.  */
 336 extern td_err_e td_ta_map_lwp2thr (const td_thragent_t *__ta, lwpid_t __lwpid,
 337                                    td_thrhandle_t *__th);
 338
 339
 340 /* Call for each thread in a process associated with TA the callback function
 341    CALLBACK.  */
 342 extern td_err_e td_ta_thr_iter (const td_thragent_t *__ta,
 343                                 td_thr_iter_f *__callback, void *__cbdata_p,
 344                                 td_thr_state_e __state, int __ti_pri,
 345                                 sigset_t *__ti_sigmask_p,
 346                                 unsigned int __ti_user_flags);
 347
 348 /* Call for each defined thread local data entry the callback function KI.  */
 349 extern td_err_e td_ta_tsd_iter (const td_thragent_t *__ta, td_key_iter_f *__ki,
 350                                 void *__p);
 351
 352
 353 /* Get event address for EVENT.  */
 354 extern td_err_e td_ta_event_addr (const td_thragent_t *__ta,
 355                                   td_event_e __event, td_notify_t *__ptr);
 356
 357 /* Enable EVENT in global mask.  */
 358 extern td_err_e td_ta_set_event (const td_thragent_t *__ta,
 359                                  td_thr_events_t *__event);
 360
 361 /* Disable EVENT in global mask.  */
 362 extern td_err_e td_ta_clear_event (const td_thragent_t *__ta,
 363                                    td_thr_events_t *__event);
 364
 365 /* Return information about last event.  */
 366 extern td_err_e td_ta_event_getmsg (const td_thragent_t *__ta,
 367                                     td_event_msg_t *msg);
 368
 369
 370 /* Set suggested concurrency level for process associated with TA.  */
 371 extern td_err_e td_ta_setconcurrency (const td_thragent_t *__ta, int __level);
 372
 373
 374 /* Enable collecting statistics for process associated with TA.  */
 375 extern td_err_e td_ta_enable_stats (const td_thragent_t *__ta, int __enable);
 376
 377 /* Reset statistics.  */
 378 extern td_err_e td_ta_reset_stats (const td_thragent_t *__ta);
 379
 380 /* Retrieve statistics from process associated with TA.  */
 381 extern td_err_e td_ta_get_stats (const td_thragent_t *__ta,
 382                                  td_ta_stats_t *__statsp);
 383
 384
 385 /* Validate that TH is a thread handle.  */
 386 extern td_err_e td_thr_validate (const td_thrhandle_t *__th);
 387
 388 /* Return information about thread TH.  */
 389 extern td_err_e td_thr_get_info (const td_thrhandle_t *__th,
 390                                  td_thrinfo_t *__infop);
 391
 392 /* Retrieve floating-point register contents of process running thread TH.  */
 393 extern td_err_e td_thr_getfpregs (const td_thrhandle_t *__th,
 394                                   prfpregset_t *__regset);
 395
 396 /* Retrieve general register contents of process running thread TH.  */
 397 extern td_err_e td_thr_getgregs (const td_thrhandle_t *__th,
 398                                  prgregset_t __gregs);
 399
 400 /* Retrieve extended register contents of process running thread TH.  */
 401 extern td_err_e td_thr_getxregs (const td_thrhandle_t *__th, void *__xregs);
 402
 403 /* Get size of extended register set of process running thread TH.  */
 404 extern td_err_e td_thr_getxregsize (const td_thrhandle_t *__th, int *__sizep);
 405
 406 /* Set floating-point register contents of process running thread TH.  */
 407 extern td_err_e td_thr_setfpregs (const td_thrhandle_t *__th,
 408                                   const prfpregset_t *__fpregs);
 409
 410 /* Set general register contents of process running thread TH.  */
 411 extern td_err_e td_thr_setgregs (const td_thrhandle_t *__th,
 412                                  prgregset_t __gregs);
 413
 414 /* Set extended register contents of process running thread TH.  */
 415 extern td_err_e td_thr_setxregs (const td_thrhandle_t *__th,
 416                                  const void *__addr);
 417
 418
 419 /* Enable reporting for EVENT for thread TH.  */
 420 extern td_err_e td_thr_event_enable (const td_thrhandle_t *__th, int __event);
 421
 422 /* Enable EVENT for thread TH.  */
 423 extern td_err_e td_thr_set_event (const td_thrhandle_t *__th,
 424                                   td_thr_events_t *__event);
 425
 426 /* Disable EVENT for thread TH.  */
 427 extern td_err_e td_thr_clear_event (const td_thrhandle_t *__th,
 428                                     td_thr_events_t *__event);
 429
 430 /* Get event message for thread TH.  */
 431 extern td_err_e td_thr_event_getmsg (const td_thrhandle_t *__th,
 432                                      td_event_msg_t *__msg);
 433
 434
 435 /* Set priority of thread TH.  */
 436 extern td_err_e td_thr_setprio (const td_thrhandle_t *__th, int __prio);
 437
 438
 439 /* Set pending signals for thread TH.  */
 440 extern td_err_e td_thr_setsigpending (const td_thrhandle_t *__th,
 441                                       unsigned char __n, const sigset_t *__ss);
 442
 443 /* Set signal mask for thread TH.  */
 444 extern td_err_e td_thr_sigsetmask (const td_thrhandle_t *__th,
 445                                    const sigset_t *__ss);
 446
 447
 448 /* Return thread local data associated with key TK in thread TH.  */
 449 extern td_err_e td_thr_tsd (const td_thrhandle_t *__th,
 450                             const thread_key_t __tk, void **__data);
 451
 452
 453 /* Suspend execution of thread TH.  */
 454 extern td_err_e td_thr_dbsuspend (const td_thrhandle_t *__th);
 455
 456 /* Resume execution of thread TH.  */
 457 extern td_err_e td_thr_dbresume (const td_thrhandle_t *__th);
 458
 459 #endif  /* thread_db.h */
 460
 461 #endif /* HAVE_THREAD_DB_H */