mirror of
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461 lines
15 KiB
C
461 lines
15 KiB
C
#ifdef HAVE_THREAD_DB_H
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#include <thread_db.h>
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#ifndef LIBTHREAD_DB_SO
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#define LIBTHREAD_DB_SO "libthread_db.so.1"
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#endif
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#ifndef LIBTHREAD_DB_SEARCH_PATH
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#define LIBTHREAD_DB_SEARCH_PATH ""
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#endif
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#else
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/* Copyright (C) 1999, 2000, 2007, 2008, 2009, 2010
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 3 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef _THREAD_DB_H
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#define _THREAD_DB_H 1
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/* This is the debugger interface for the LinuxThreads library. It is
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modelled closely after the interface with same names in Solaris with
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the goal to share the same code in the debugger. */
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#include <pthread.h>
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#include <sys/types.h>
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#include <sys/procfs.h>
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/* Error codes of the library. */
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typedef enum
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{
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TD_OK, /* No error. */
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TD_ERR, /* No further specified error. */
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TD_NOTHR, /* No matching thread found. */
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TD_NOSV, /* No matching synchronization handle found. */
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TD_NOLWP, /* No matching light-weighted process found. */
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TD_BADPH, /* Invalid process handle. */
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TD_BADTH, /* Invalid thread handle. */
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TD_BADSH, /* Invalid synchronization handle. */
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TD_BADTA, /* Invalid thread agent. */
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TD_BADKEY, /* Invalid key. */
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TD_NOMSG, /* No event available. */
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TD_NOFPREGS, /* No floating-point register content available. */
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TD_NOLIBTHREAD, /* Application not linked with thread library. */
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TD_NOEVENT, /* Requested event is not supported. */
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TD_NOCAPAB, /* Capability not available. */
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TD_DBERR, /* Internal debug library error. */
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TD_NOAPLIC, /* Operation is not applicable. */
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TD_NOTSD, /* No thread-specific data available. */
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TD_MALLOC, /* Out of memory. */
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TD_PARTIALREG, /* Not entire register set was read or written. */
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TD_NOXREGS, /* X register set not available for given thread. */
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TD_NOTALLOC /* TLS memory not yet allocated. */
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} td_err_e;
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/* Possible thread states. TD_THR_ANY_STATE is a pseudo-state used to
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select threads regardless of state in td_ta_thr_iter(). */
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typedef enum
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{
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TD_THR_ANY_STATE,
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TD_THR_UNKNOWN,
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TD_THR_STOPPED,
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TD_THR_RUN,
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TD_THR_ACTIVE,
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TD_THR_ZOMBIE,
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TD_THR_SLEEP,
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TD_THR_STOPPED_ASLEEP
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} td_thr_state_e;
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/* Thread type: user or system. TD_THR_ANY_TYPE is a pseudo-type used
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to select threads regardless of type in td_ta_thr_iter(). */
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typedef enum
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{
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TD_THR_ANY_TYPE,
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TD_THR_USER,
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TD_THR_SYSTEM
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} td_thr_type_e;
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/* Types of the debugging library. */
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/* Handle for a process. This type is opaque. */
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typedef struct td_thragent td_thragent_t;
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/* The actual thread handle type. This is also opaque. */
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typedef struct td_thrhandle
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{
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td_thragent_t *th_ta_p;
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psaddr_t th_unique;
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} td_thrhandle_t;
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/* Flags for `td_ta_thr_iter'. */
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#define TD_THR_ANY_USER_FLAGS 0xffffffff
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#define TD_THR_LOWEST_PRIORITY -20
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#define TD_SIGNO_MASK NULL
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#define TD_EVENTSIZE 2
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#define BT_UISHIFT 5 /* log base 2 of BT_NBIPUI, to extract word index */
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#define BT_NBIPUI (1 << BT_UISHIFT) /* n bits per uint */
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#define BT_UIMASK (BT_NBIPUI - 1) /* to extract bit index */
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/* Bitmask of enabled events. */
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typedef struct td_thr_events
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{
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uint32_t event_bits[TD_EVENTSIZE];
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} td_thr_events_t;
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/* Event set manipulation macros. */
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#define __td_eventmask(n) \
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(UINT32_C (1) << (((n) - 1) & BT_UIMASK))
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#define __td_eventword(n) \
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((UINT32_C ((n) - 1)) >> BT_UISHIFT)
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#define td_event_emptyset(setp) \
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do { \
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int __i; \
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for (__i = TD_EVENTSIZE; __i > 0; --__i) \
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(setp)->event_bits[__i - 1] = 0; \
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} while (0)
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#define td_event_fillset(setp) \
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do { \
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int __i; \
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for (__i = TD_EVENTSIZE; __i > 0; --__i) \
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(setp)->event_bits[__i - 1] = UINT32_C (0xffffffff); \
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} while (0)
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#define td_event_addset(setp, n) \
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(((setp)->event_bits[__td_eventword (n)]) |= __td_eventmask (n))
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#define td_event_delset(setp, n) \
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(((setp)->event_bits[__td_eventword (n)]) &= ~__td_eventmask (n))
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#define td_eventismember(setp, n) \
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(__td_eventmask (n) & ((setp)->event_bits[__td_eventword (n)]))
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#if TD_EVENTSIZE == 2
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# define td_eventisempty(setp) \
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(!((setp)->event_bits[0]) && !((setp)->event_bits[1]))
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#else
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# error "td_eventisempty must be changed to match TD_EVENTSIZE"
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#endif
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/* Events reportable by the thread implementation. */
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typedef enum
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{
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TD_ALL_EVENTS, /* Pseudo-event number. */
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TD_EVENT_NONE = TD_ALL_EVENTS, /* Depends on context. */
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TD_READY, /* Is executable now. */
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TD_SLEEP, /* Blocked in a synchronization obj. */
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TD_SWITCHTO, /* Now assigned to a process. */
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TD_SWITCHFROM, /* Not anymore assigned to a process. */
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TD_LOCK_TRY, /* Trying to get an unavailable lock. */
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TD_CATCHSIG, /* Signal posted to the thread. */
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TD_IDLE, /* Process getting idle. */
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TD_CREATE, /* New thread created. */
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TD_DEATH, /* Thread terminated. */
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TD_PREEMPT, /* Preempted. */
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TD_PRI_INHERIT, /* Inherited elevated priority. */
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TD_REAP, /* Reaped. */
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TD_CONCURRENCY, /* Number of processes changing. */
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TD_TIMEOUT, /* Conditional variable wait timed out. */
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TD_MIN_EVENT_NUM = TD_READY,
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TD_MAX_EVENT_NUM = TD_TIMEOUT,
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TD_EVENTS_ENABLE = 31 /* Event reporting enabled. */
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} td_event_e;
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/* Values representing the different ways events are reported. */
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typedef enum
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{
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NOTIFY_BPT, /* User must insert breakpoint at u.bptaddr. */
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NOTIFY_AUTOBPT, /* Breakpoint at u.bptaddr is automatically
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inserted. */
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NOTIFY_SYSCALL /* System call u.syscallno will be invoked. */
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} td_notify_e;
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/* Description how event type is reported. */
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typedef struct td_notify
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{
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td_notify_e type; /* Way the event is reported. */
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union
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{
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psaddr_t bptaddr; /* Address of breakpoint. */
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int syscallno; /* Number of system call used. */
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} u;
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} td_notify_t;
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/* Some people still have libc5 or old glibc with no uintptr_t.
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They lose. glibc 2.1.3 was released on 2000-02-25, and it has
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uintptr_t, so it's reasonable to force these people to upgrade. */
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#ifndef HAVE_UINTPTR_T
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#error No uintptr_t available; your C library is too old.
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/* Inhibit further compilation errors after this error. */
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#define uintptr_t void *
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#endif
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/* Structure used to report event. */
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typedef struct td_event_msg
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{
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td_event_e event; /* Event type being reported. */
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const td_thrhandle_t *th_p; /* Thread reporting the event. */
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union
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{
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#if 0
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td_synchandle_t *sh; /* Handle of synchronization object. */
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#endif
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uintptr_t data; /* Event specific data. */
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} msg;
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} td_event_msg_t;
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/* Structure containing event data available in each thread structure. */
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typedef struct
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{
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td_thr_events_t eventmask; /* Mask of enabled events. */
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td_event_e eventnum; /* Number of last event. */
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void *eventdata; /* Data associated with event. */
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} td_eventbuf_t;
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/* Gathered statistics about the process. */
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typedef struct td_ta_stats
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{
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int nthreads; /* Total number of threads in use. */
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int r_concurrency; /* Concurrency level requested by user. */
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int nrunnable_num; /* Average runnable threads, numerator. */
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int nrunnable_den; /* Average runnable threads, denominator. */
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int a_concurrency_num; /* Achieved concurrency level, numerator. */
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int a_concurrency_den; /* Achieved concurrency level, denominator. */
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int nlwps_num; /* Average number of processes in use,
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numerator. */
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int nlwps_den; /* Average number of processes in use,
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denominator. */
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int nidle_num; /* Average number of idling processes,
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numerator. */
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int nidle_den; /* Average number of idling processes,
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denominator. */
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} td_ta_stats_t;
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/* Since Sun's library is based on Solaris threads we have to define a few
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types to map them to POSIX threads. */
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typedef pthread_t thread_t;
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typedef pthread_key_t thread_key_t;
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/* Callback for iteration over threads. */
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typedef int td_thr_iter_f (const td_thrhandle_t *, void *);
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/* Callback for iteration over thread local data. */
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typedef int td_key_iter_f (thread_key_t, void (*) (void *), void *);
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/* Forward declaration. This has to be defined by the user. */
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struct ps_prochandle;
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/* Information about the thread. */
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typedef struct td_thrinfo
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{
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td_thragent_t *ti_ta_p; /* Process handle. */
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unsigned int ti_user_flags; /* Unused. */
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thread_t ti_tid; /* Thread ID returned by
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pthread_create(). */
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char *ti_tls; /* Pointer to thread-local data. */
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psaddr_t ti_startfunc; /* Start function passed to
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pthread_create(). */
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psaddr_t ti_stkbase; /* Base of thread's stack. */
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long int ti_stksize; /* Size of thread's stack. */
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psaddr_t ti_ro_area; /* Unused. */
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int ti_ro_size; /* Unused. */
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td_thr_state_e ti_state; /* Thread state. */
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unsigned char ti_db_suspended; /* Nonzero if suspended by debugger. */
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td_thr_type_e ti_type; /* Type of the thread (system vs
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user thread). */
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intptr_t ti_pc; /* Unused. */
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intptr_t ti_sp; /* Unused. */
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short int ti_flags; /* Unused. */
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int ti_pri; /* Thread priority. */
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lwpid_t ti_lid; /* Kernel pid for this thread. */
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sigset_t ti_sigmask; /* Signal mask. */
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unsigned char ti_traceme; /* Nonzero if event reporting
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enabled. */
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unsigned char ti_preemptflag; /* Unused. */
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unsigned char ti_pirecflag; /* Unused. */
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sigset_t ti_pending; /* Set of pending signals. */
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td_thr_events_t ti_events; /* Set of enabled events. */
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} td_thrinfo_t;
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/* Prototypes for exported library functions. */
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/* Initialize the thread debug support library. */
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extern td_err_e td_init (void);
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/* Historical relict. Should not be used anymore. */
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extern td_err_e td_log (void);
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/* Generate new thread debug library handle for process PS. */
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extern td_err_e td_ta_new (struct ps_prochandle *__ps, td_thragent_t **__ta);
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/* Free resources allocated for TA. */
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extern td_err_e td_ta_delete (td_thragent_t *__ta);
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/* Get number of currently running threads in process associated with TA. */
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extern td_err_e td_ta_get_nthreads (const td_thragent_t *__ta, int *__np);
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/* Return process handle passed in `td_ta_new' for process associated with
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TA. */
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extern td_err_e td_ta_get_ph (const td_thragent_t *__ta,
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struct ps_prochandle **__ph);
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/* Map thread library handle PT to thread debug library handle for process
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associated with TA and store result in *TH. */
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extern td_err_e td_ta_map_id2thr (const td_thragent_t *__ta, pthread_t __pt,
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td_thrhandle_t *__th);
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/* Map process ID LWPID to thread debug library handle for process
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associated with TA and store result in *TH. */
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extern td_err_e td_ta_map_lwp2thr (const td_thragent_t *__ta, lwpid_t __lwpid,
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td_thrhandle_t *__th);
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/* Call for each thread in a process associated with TA the callback function
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CALLBACK. */
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extern td_err_e td_ta_thr_iter (const td_thragent_t *__ta,
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td_thr_iter_f *__callback, void *__cbdata_p,
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td_thr_state_e __state, int __ti_pri,
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sigset_t *__ti_sigmask_p,
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unsigned int __ti_user_flags);
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/* Call for each defined thread local data entry the callback function KI. */
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extern td_err_e td_ta_tsd_iter (const td_thragent_t *__ta, td_key_iter_f *__ki,
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void *__p);
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/* Get event address for EVENT. */
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extern td_err_e td_ta_event_addr (const td_thragent_t *__ta,
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td_event_e __event, td_notify_t *__ptr);
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/* Enable EVENT in global mask. */
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extern td_err_e td_ta_set_event (const td_thragent_t *__ta,
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td_thr_events_t *__event);
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/* Disable EVENT in global mask. */
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extern td_err_e td_ta_clear_event (const td_thragent_t *__ta,
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td_thr_events_t *__event);
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/* Return information about last event. */
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extern td_err_e td_ta_event_getmsg (const td_thragent_t *__ta,
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td_event_msg_t *msg);
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/* Set suggested concurrency level for process associated with TA. */
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extern td_err_e td_ta_setconcurrency (const td_thragent_t *__ta, int __level);
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/* Enable collecting statistics for process associated with TA. */
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extern td_err_e td_ta_enable_stats (const td_thragent_t *__ta, int __enable);
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/* Reset statistics. */
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extern td_err_e td_ta_reset_stats (const td_thragent_t *__ta);
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/* Retrieve statistics from process associated with TA. */
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extern td_err_e td_ta_get_stats (const td_thragent_t *__ta,
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td_ta_stats_t *__statsp);
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/* Validate that TH is a thread handle. */
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extern td_err_e td_thr_validate (const td_thrhandle_t *__th);
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/* Return information about thread TH. */
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extern td_err_e td_thr_get_info (const td_thrhandle_t *__th,
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td_thrinfo_t *__infop);
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/* Retrieve floating-point register contents of process running thread TH. */
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extern td_err_e td_thr_getfpregs (const td_thrhandle_t *__th,
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prfpregset_t *__regset);
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/* Retrieve general register contents of process running thread TH. */
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extern td_err_e td_thr_getgregs (const td_thrhandle_t *__th,
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prgregset_t __gregs);
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/* Retrieve extended register contents of process running thread TH. */
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extern td_err_e td_thr_getxregs (const td_thrhandle_t *__th, void *__xregs);
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/* Get size of extended register set of process running thread TH. */
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extern td_err_e td_thr_getxregsize (const td_thrhandle_t *__th, int *__sizep);
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/* Set floating-point register contents of process running thread TH. */
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extern td_err_e td_thr_setfpregs (const td_thrhandle_t *__th,
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const prfpregset_t *__fpregs);
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/* Set general register contents of process running thread TH. */
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extern td_err_e td_thr_setgregs (const td_thrhandle_t *__th,
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prgregset_t __gregs);
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/* Set extended register contents of process running thread TH. */
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extern td_err_e td_thr_setxregs (const td_thrhandle_t *__th,
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const void *__addr);
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/* Enable reporting for EVENT for thread TH. */
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extern td_err_e td_thr_event_enable (const td_thrhandle_t *__th, int __event);
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/* Enable EVENT for thread TH. */
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extern td_err_e td_thr_set_event (const td_thrhandle_t *__th,
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td_thr_events_t *__event);
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/* Disable EVENT for thread TH. */
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extern td_err_e td_thr_clear_event (const td_thrhandle_t *__th,
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td_thr_events_t *__event);
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/* Get event message for thread TH. */
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extern td_err_e td_thr_event_getmsg (const td_thrhandle_t *__th,
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td_event_msg_t *__msg);
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/* Set priority of thread TH. */
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extern td_err_e td_thr_setprio (const td_thrhandle_t *__th, int __prio);
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/* Set pending signals for thread TH. */
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extern td_err_e td_thr_setsigpending (const td_thrhandle_t *__th,
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unsigned char __n, const sigset_t *__ss);
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/* Set signal mask for thread TH. */
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extern td_err_e td_thr_sigsetmask (const td_thrhandle_t *__th,
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const sigset_t *__ss);
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/* Return thread local data associated with key TK in thread TH. */
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extern td_err_e td_thr_tsd (const td_thrhandle_t *__th,
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const thread_key_t __tk, void **__data);
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/* Suspend execution of thread TH. */
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extern td_err_e td_thr_dbsuspend (const td_thrhandle_t *__th);
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/* Resume execution of thread TH. */
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extern td_err_e td_thr_dbresume (const td_thrhandle_t *__th);
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#endif /* thread_db.h */
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#endif /* HAVE_THREAD_DB_H */
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