| |
| /*--------------------------------------------------------------------*/ |
| /*--- A replacement for the standard libpthread.so. ---*/ |
| /*--- vg_libpthread.c ---*/ |
| /*--------------------------------------------------------------------*/ |
| |
| /* |
| This file is part of Valgrind, an x86 protected-mode emulator |
| designed for debugging and profiling binaries on x86-Unixes. |
| |
| Copyright (C) 2000-2002 Julian Seward |
| jseward@acm.org |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307, USA. |
| |
| The GNU General Public License is contained in the file LICENSE. |
| */ |
| |
| /* ALL THIS CODE RUNS ON THE SIMULATED CPU. |
| |
| This is a replacement for the standard libpthread.so. It is loaded |
| as part of the client's image (if required) and directs pthread |
| calls through to Valgrind's request mechanism. |
| |
| A couple of caveats. |
| |
| 1. Since it's a binary-compatible replacement for an existing library, |
| we must take care to used exactly the same data layouts, etc, as |
| the standard pthread.so does. |
| |
| 2. Since this runs as part of the client, there are no specific |
| restrictions on what headers etc we can include, so long as |
| this libpthread.so does not end up having dependencies on .so's |
| which the real one doesn't. |
| |
| Later ... it appears we cannot call file-related stuff in libc here, |
| perhaps fair enough. Be careful what you call from here. Even exit() |
| doesn't work (gives infinite recursion and then stack overflow); hence |
| myexit(). Also fprintf doesn't seem safe. |
| */ |
| |
| #include "valgrind.h" /* For the request-passing mechanism */ |
| #include "vg_include.h" /* For the VG_USERREQ__* constants */ |
| |
| #include <unistd.h> |
| #include <string.h> |
| #ifdef GLIBC_2_1 |
| #include <sys/time.h> |
| #endif |
| |
| /* --------------------------------------------------------------------- |
| Helpers. We have to be pretty self-sufficient. |
| ------------------------------------------------------------------ */ |
| |
| /* Number of times any given error message is printed. */ |
| #define N_MOANS 3 |
| |
| /* Extract from Valgrind the value of VG_(clo_trace_pthread_level). |
| Returns 0 (none) if not running on Valgrind. */ |
| static |
| int get_pt_trace_level ( void ) |
| { |
| int res; |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__GET_PTHREAD_TRACE_LEVEL, |
| 0, 0, 0, 0); |
| return res; |
| } |
| |
| |
| static |
| void myexit ( int arg ) |
| { |
| int __res; |
| __asm__ volatile ("movl %%ecx, %%ebx ; int $0x80" |
| : "=a" (__res) |
| : "0" (__NR_exit), |
| "c" (arg) ); |
| /* We don't bother to mention the fact that this asm trashes %ebx, |
| since it won't return. If you ever do let it return ... fix |
| this! */ |
| } |
| |
| |
| /* We need this guy -- it's in valgrind.so. */ |
| extern void VG_(startup) ( void ); |
| |
| |
| /* Just start up Valgrind if it's not already going. VG_(startup)() |
| detects and ignores second and subsequent calls. */ |
| static __inline__ |
| void ensure_valgrind ( char* caller ) |
| { |
| VG_(startup)(); |
| } |
| |
| /* While we're at it ... hook our own startup function into this |
| game. */ |
| __asm__ ( |
| ".section .init\n" |
| "\tcall vgPlain_startup" |
| ); |
| |
| |
| static |
| __attribute__((noreturn)) |
| void barf ( char* str ) |
| { |
| char buf[100]; |
| buf[0] = 0; |
| strcat(buf, "\nvalgrind's libpthread.so: "); |
| strcat(buf, str); |
| strcat(buf, "\n\n"); |
| write(2, buf, strlen(buf)); |
| myexit(1); |
| /* We have to persuade gcc into believing this doesn't return. */ |
| while (1) { }; |
| } |
| |
| |
| static void ignored ( char* msg ) |
| { |
| if (get_pt_trace_level() >= 0) { |
| char* ig = "valgrind's libpthread.so: IGNORED call to: "; |
| write(2, ig, strlen(ig)); |
| write(2, msg, strlen(msg)); |
| ig = "\n"; |
| write(2, ig, strlen(ig)); |
| } |
| } |
| |
| static void kludged ( char* msg ) |
| { |
| if (get_pt_trace_level() >= 0) { |
| char* ig = "valgrind's libpthread.so: KLUDGED call to: "; |
| write(2, ig, strlen(ig)); |
| write(2, msg, strlen(msg)); |
| ig = "\n"; |
| write(2, ig, strlen(ig)); |
| } |
| } |
| |
| static void not_inside ( char* msg ) |
| { |
| VG_(startup)(); |
| } |
| |
| void vgPlain_unimp ( char* what ) |
| { |
| char* ig = "valgrind's libpthread.so: UNIMPLEMENTED FUNCTION: "; |
| write(2, ig, strlen(ig)); |
| write(2, what, strlen(what)); |
| ig = "\n"; |
| write(2, ig, strlen(ig)); |
| barf("Please report this bug to me at: jseward@acm.org"); |
| } |
| |
| |
| /* --------------------------------------------------------------------- |
| Pass pthread_ calls to Valgrind's request mechanism. |
| ------------------------------------------------------------------ */ |
| |
| #include <pthread.h> |
| #include <stdio.h> |
| #include <errno.h> |
| #include <assert.h> |
| #include <sys/time.h> /* gettimeofday */ |
| |
| /* --------------------------------------------------- |
| THREAD ATTRIBUTES |
| ------------------------------------------------ */ |
| |
| int pthread_attr_init(pthread_attr_t *attr) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| ignored("pthread_attr_init"); |
| return 0; |
| } |
| |
| int pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| ignored("pthread_attr_setdetachstate"); |
| return 0; |
| } |
| |
| int pthread_attr_setinheritsched(pthread_attr_t *attr, int inherit) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| ignored("pthread_attr_setinheritsched"); |
| return 0; |
| } |
| |
| __attribute__((weak)) |
| int pthread_attr_setstacksize (pthread_attr_t *__attr, |
| size_t __stacksize) |
| { |
| ensure_valgrind("pthread_attr_setstacksize"); |
| if (__stacksize < VG_PTHREAD_STACK_SIZE) |
| return 0; |
| barf("pthread_attr_setstacksize: " |
| "requested size >= VG_PTHREAD_STACK_SIZE\n " |
| "edit vg_include.h and rebuild."); |
| } |
| |
| |
| /* This is completely bogus. */ |
| int pthread_attr_getschedparam(const pthread_attr_t *attr, |
| struct sched_param *param) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| kludged("pthread_attr_getschedparam"); |
| # ifdef GLIBC_2_1 |
| if (param) param->sched_priority = 0; /* who knows */ |
| # else |
| if (param) param->__sched_priority = 0; /* who knows */ |
| # endif |
| return 0; |
| } |
| |
| int pthread_attr_setschedparam(pthread_attr_t *attr, |
| const struct sched_param *param) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| ignored("pthread_attr_setschedparam"); |
| return 0; |
| } |
| |
| int pthread_attr_destroy(pthread_attr_t *attr) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| ignored("pthread_attr_destroy"); |
| return 0; |
| } |
| |
| /* --------------------------------------------------- |
| THREADs |
| ------------------------------------------------ */ |
| |
| int pthread_equal(pthread_t thread1, pthread_t thread2) |
| { |
| return thread1 == thread2 ? 1 : 0; |
| } |
| |
| |
| int |
| pthread_create (pthread_t *__restrict __thread, |
| __const pthread_attr_t *__restrict __attr, |
| void *(*__start_routine) (void *), |
| void *__restrict __arg) |
| { |
| int res; |
| ensure_valgrind("pthread_create"); |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__PTHREAD_CREATE, |
| __thread, __attr, __start_routine, __arg); |
| return res; |
| } |
| |
| |
| |
| int |
| pthread_join (pthread_t __th, void **__thread_return) |
| { |
| int res; |
| ensure_valgrind("pthread_join"); |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__PTHREAD_JOIN, |
| __th, __thread_return, 0, 0); |
| return res; |
| } |
| |
| |
| void pthread_exit(void *retval) |
| { |
| int res; |
| ensure_valgrind("pthread_exit"); |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__PTHREAD_EXIT, |
| retval, 0, 0, 0); |
| /* Doesn't return! */ |
| /* However, we have to fool gcc into knowing that. */ |
| barf("pthread_exit: still alive after request?!"); |
| } |
| |
| |
| pthread_t pthread_self(void) |
| { |
| int tid; |
| ensure_valgrind("pthread_self"); |
| VALGRIND_MAGIC_SEQUENCE(tid, 1 /* default */, |
| VG_USERREQ__PTHREAD_GET_THREADID, |
| 0, 0, 0, 0); |
| if (tid < 1 || tid >= VG_N_THREADS) |
| barf("pthread_self: invalid ThreadId"); |
| return tid; |
| } |
| |
| |
| int pthread_detach(pthread_t th) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| ignored("pthread_detach"); |
| return 0; |
| } |
| |
| |
| /* --------------------------------------------------- |
| MUTEX ATTRIBUTES |
| ------------------------------------------------ */ |
| |
| int __pthread_mutexattr_init(pthread_mutexattr_t *attr) |
| { |
| attr->__mutexkind = PTHREAD_MUTEX_ERRORCHECK_NP; |
| return 0; |
| } |
| |
| int __pthread_mutexattr_settype(pthread_mutexattr_t *attr, int type) |
| { |
| switch (type) { |
| # ifndef GLIBC_2_1 |
| case PTHREAD_MUTEX_TIMED_NP: |
| case PTHREAD_MUTEX_ADAPTIVE_NP: |
| # endif |
| # ifdef GLIBC_2_1 |
| case PTHREAD_MUTEX_FAST_NP: |
| # endif |
| case PTHREAD_MUTEX_RECURSIVE_NP: |
| case PTHREAD_MUTEX_ERRORCHECK_NP: |
| attr->__mutexkind = type; |
| return 0; |
| default: |
| return EINVAL; |
| } |
| } |
| |
| int __pthread_mutexattr_destroy(pthread_mutexattr_t *attr) |
| { |
| return 0; |
| } |
| |
| |
| /* --------------------------------------------------- |
| MUTEXes |
| ------------------------------------------------ */ |
| |
| int __pthread_mutex_init(pthread_mutex_t *mutex, |
| const pthread_mutexattr_t *mutexattr) |
| { |
| mutex->__m_count = 0; |
| mutex->__m_owner = (_pthread_descr)VG_INVALID_THREADID; |
| mutex->__m_kind = PTHREAD_MUTEX_ERRORCHECK_NP; |
| if (mutexattr) |
| mutex->__m_kind = mutexattr->__mutexkind; |
| return 0; |
| } |
| |
| |
| int __pthread_mutex_lock(pthread_mutex_t *mutex) |
| { |
| int res; |
| static int moans = N_MOANS; |
| if (RUNNING_ON_VALGRIND) { |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__PTHREAD_MUTEX_LOCK, |
| mutex, 0, 0, 0); |
| return res; |
| } else { |
| if (moans-- > 0) |
| not_inside("pthread_mutex_lock"); |
| return 0; /* success */ |
| } |
| } |
| |
| |
| int __pthread_mutex_trylock(pthread_mutex_t *mutex) |
| { |
| int res; |
| static int moans = N_MOANS; |
| if (RUNNING_ON_VALGRIND) { |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__PTHREAD_MUTEX_TRYLOCK, |
| mutex, 0, 0, 0); |
| return res; |
| } else { |
| if (moans-- > 0) |
| not_inside("pthread_mutex_trylock"); |
| return 0; |
| } |
| } |
| |
| |
| int __pthread_mutex_unlock(pthread_mutex_t *mutex) |
| { |
| int res; |
| static int moans = N_MOANS; |
| if (RUNNING_ON_VALGRIND) { |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__PTHREAD_MUTEX_UNLOCK, |
| mutex, 0, 0, 0); |
| return res; |
| } else { |
| if (moans-- > 0) |
| not_inside("pthread_mutex_unlock"); |
| return 0; |
| } |
| } |
| |
| |
| int __pthread_mutex_destroy(pthread_mutex_t *mutex) |
| { |
| /* Valgrind doesn't hold any resources on behalf of the mutex, so no |
| need to involve it. */ |
| if (mutex->__m_count > 0) |
| return EBUSY; |
| mutex->__m_count = 0; |
| mutex->__m_owner = (_pthread_descr)VG_INVALID_THREADID; |
| mutex->__m_kind = PTHREAD_MUTEX_ERRORCHECK_NP; |
| return 0; |
| } |
| |
| |
| /* --------------------------------------------------- |
| CONDITION VARIABLES |
| ------------------------------------------------ */ |
| |
| /* LinuxThreads supports no attributes for conditions. Hence ... */ |
| |
| int pthread_condattr_init(pthread_condattr_t *attr) |
| { |
| return 0; |
| } |
| |
| int pthread_condattr_destroy(pthread_condattr_t *attr) |
| { |
| return 0; |
| } |
| |
| int pthread_cond_init( pthread_cond_t *cond, |
| const pthread_condattr_t *cond_attr) |
| { |
| cond->__c_waiting = (_pthread_descr)VG_INVALID_THREADID; |
| return 0; |
| } |
| |
| int pthread_cond_destroy(pthread_cond_t *cond) |
| { |
| /* should check that no threads are waiting on this CV */ |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| kludged("pthread_cond_destroy"); |
| return 0; |
| } |
| |
| /* --------------------------------------------------- |
| SCHEDULING |
| ------------------------------------------------ */ |
| |
| /* This is completely bogus. */ |
| int pthread_getschedparam(pthread_t target_thread, |
| int *policy, |
| struct sched_param *param) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| kludged("pthread_getschedparam"); |
| if (policy) *policy = SCHED_OTHER; |
| # ifdef GLIBC_2_1 |
| if (param) param->sched_priority = 0; /* who knows */ |
| # else |
| if (param) param->__sched_priority = 0; /* who knows */ |
| # endif |
| return 0; |
| } |
| |
| int pthread_setschedparam(pthread_t target_thread, |
| int policy, |
| const struct sched_param *param) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| ignored("pthread_setschedparam"); |
| return 0; |
| } |
| |
| int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex) |
| { |
| int res; |
| ensure_valgrind("pthread_cond_wait"); |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__PTHREAD_COND_WAIT, |
| cond, mutex, 0, 0); |
| return res; |
| } |
| |
| int pthread_cond_timedwait ( pthread_cond_t *cond, |
| pthread_mutex_t *mutex, |
| const struct timespec *abstime ) |
| { |
| int res; |
| unsigned int ms_now, ms_end; |
| struct timeval timeval_now; |
| unsigned long long int ull_ms_now_after_1970; |
| unsigned long long int ull_ms_end_after_1970; |
| |
| ensure_valgrind("pthread_cond_timedwait"); |
| VALGRIND_MAGIC_SEQUENCE(ms_now, 0xFFFFFFFF /* default */, |
| VG_USERREQ__READ_MILLISECOND_TIMER, |
| 0, 0, 0, 0); |
| assert(ms_now != 0xFFFFFFFF); |
| res = gettimeofday(&timeval_now, NULL); |
| assert(res == 0); |
| |
| ull_ms_now_after_1970 |
| = 1000ULL * ((unsigned long long int)(timeval_now.tv_sec)) |
| + ((unsigned long long int)(timeval_now.tv_usec / 1000000)); |
| ull_ms_end_after_1970 |
| = 1000ULL * ((unsigned long long int)(abstime->tv_sec)) |
| + ((unsigned long long int)(abstime->tv_nsec / 1000000)); |
| assert(ull_ms_end_after_1970 >= ull_ms_now_after_1970); |
| ms_end |
| = ms_now + (unsigned int)(ull_ms_end_after_1970 - ull_ms_now_after_1970); |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__PTHREAD_COND_TIMEDWAIT, |
| cond, mutex, ms_end, 0); |
| return res; |
| } |
| |
| |
| int pthread_cond_signal(pthread_cond_t *cond) |
| { |
| int res; |
| ensure_valgrind("pthread_cond_signal"); |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__PTHREAD_COND_SIGNAL, |
| cond, 0, 0, 0); |
| return res; |
| } |
| |
| int pthread_cond_broadcast(pthread_cond_t *cond) |
| { |
| int res; |
| ensure_valgrind("pthread_cond_broadcast"); |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__PTHREAD_COND_BROADCAST, |
| cond, 0, 0, 0); |
| return res; |
| } |
| |
| |
| /* --------------------------------------------------- |
| CANCELLATION |
| ------------------------------------------------ */ |
| |
| int pthread_setcancelstate(int state, int *oldstate) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| ignored("pthread_setcancelstate"); |
| return 0; |
| } |
| |
| int pthread_setcanceltype(int type, int *oldtype) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| ignored("pthread_setcanceltype"); |
| return 0; |
| } |
| |
| int pthread_cancel(pthread_t thread) |
| { |
| int res; |
| ensure_valgrind("pthread_cancel"); |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__PTHREAD_CANCEL, |
| thread, 0, 0, 0); |
| return res; |
| } |
| |
| void pthread_testcancel(void) |
| { |
| } |
| |
| /*-------------------*/ |
| static pthread_mutex_t massacre_mx = PTHREAD_MUTEX_INITIALIZER; |
| |
| void __pthread_kill_other_threads_np ( void ) |
| { |
| int i, res, me; |
| __pthread_mutex_lock(&massacre_mx); |
| me = pthread_self(); |
| for (i = 1; i < VG_N_THREADS; i++) { |
| if (i == me) continue; |
| res = pthread_cancel(i); |
| if (0 && res == 0) |
| printf("----------- NUKED %d\n", i); |
| } |
| __pthread_mutex_unlock(&massacre_mx); |
| } |
| |
| |
| /* --------------------------------------------------- |
| SIGNALS |
| ------------------------------------------------ */ |
| |
| #include <signal.h> |
| |
| int pthread_sigmask(int how, const sigset_t *newmask, |
| sigset_t *oldmask) |
| { |
| int res; |
| |
| /* A bit subtle, because the scheduler expects newmask and oldmask |
| to be vki_sigset_t* rather than sigset_t*, and the two are |
| different. Fortunately the first 64 bits of a sigset_t are |
| exactly a vki_sigset_t, so we just pass the pointers through |
| unmodified. Haaaack! |
| |
| Also mash the how value so that the SIG_ constants from glibc |
| constants to VKI_ constants, so that the former do not have to |
| be included into vg_scheduler.c. */ |
| |
| ensure_valgrind("pthread_sigmask"); |
| |
| switch (how) { |
| case SIG_SETMASK: how = VKI_SIG_SETMASK; break; |
| case SIG_BLOCK: how = VKI_SIG_BLOCK; break; |
| case SIG_UNBLOCK: how = VKI_SIG_UNBLOCK; break; |
| default: return EINVAL; |
| } |
| |
| /* Crude check */ |
| if (newmask == NULL) |
| return EFAULT; |
| |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__PTHREAD_SIGMASK, |
| how, newmask, oldmask, 0); |
| |
| /* The scheduler tells us of any memory violations. */ |
| return res == 0 ? 0 : EFAULT; |
| } |
| |
| |
| int sigwait ( const sigset_t* set, int* sig ) |
| { |
| int res; |
| ensure_valgrind("sigwait"); |
| /* As with pthread_sigmask we deliberately confuse sigset_t with |
| vki_ksigset_t. */ |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__SIGWAIT, |
| set, sig, 0, 0); |
| return res; |
| } |
| |
| |
| int pthread_kill(pthread_t thread, int signo) |
| { |
| int res; |
| ensure_valgrind("pthread_kill"); |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__PTHREAD_KILL, |
| thread, signo, 0, 0); |
| return res; |
| } |
| |
| |
| /* Copied verbatim from Linuxthreads */ |
| /* Redefine raise() to send signal to calling thread only, |
| as per POSIX 1003.1c */ |
| int raise (int sig) |
| { |
| int retcode = pthread_kill(pthread_self(), sig); |
| if (retcode == 0) |
| return 0; |
| else { |
| errno = retcode; |
| return -1; |
| } |
| } |
| |
| |
| /* --------------------------------------------------- |
| THREAD-SPECIFICs |
| ------------------------------------------------ */ |
| |
| int __pthread_key_create(pthread_key_t *key, |
| void (*destr_function) (void *)) |
| { |
| int res; |
| ensure_valgrind("pthread_key_create"); |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__PTHREAD_KEY_CREATE, |
| key, destr_function, 0, 0); |
| return res; |
| } |
| |
| int pthread_key_delete(pthread_key_t key) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| ignored("pthread_key_delete"); |
| return 0; |
| } |
| |
| int __pthread_setspecific(pthread_key_t key, const void *pointer) |
| { |
| int res; |
| ensure_valgrind("pthread_setspecific"); |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__PTHREAD_SETSPECIFIC, |
| key, pointer, 0, 0); |
| return res; |
| } |
| |
| void * __pthread_getspecific(pthread_key_t key) |
| { |
| int res; |
| ensure_valgrind("pthread_getspecific"); |
| VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| VG_USERREQ__PTHREAD_GETSPECIFIC, |
| key, 0 , 0, 0); |
| return (void*)res; |
| } |
| |
| |
| /* --------------------------------------------------- |
| ONCEry |
| ------------------------------------------------ */ |
| |
| static pthread_mutex_t once_masterlock = PTHREAD_MUTEX_INITIALIZER; |
| |
| |
| int __pthread_once ( pthread_once_t *once_control, |
| void (*init_routine) (void) ) |
| { |
| int res; |
| ensure_valgrind("pthread_once"); |
| |
| res = __pthread_mutex_lock(&once_masterlock); |
| |
| if (res != 0) { |
| printf("res = %d\n",res); |
| barf("pthread_once: Looks like your program's " |
| "init routine calls back to pthread_once() ?!"); |
| } |
| |
| if (*once_control == 0) { |
| *once_control = 1; |
| init_routine(); |
| } |
| |
| __pthread_mutex_unlock(&once_masterlock); |
| |
| return 0; |
| } |
| |
| |
| /* --------------------------------------------------- |
| MISC |
| ------------------------------------------------ */ |
| |
| int __pthread_atfork ( void (*prepare)(void), |
| void (*parent)(void), |
| void (*child)(void) ) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| ignored("pthread_atfork"); |
| return 0; |
| } |
| |
| |
| __attribute__((weak)) |
| void __pthread_initialize ( void ) |
| { |
| ensure_valgrind("__pthread_initialize"); |
| } |
| |
| |
| /* --------------------------------------------------- |
| LIBRARY-PRIVATE THREAD SPECIFIC STATE |
| ------------------------------------------------ */ |
| |
| #include <resolv.h> |
| static int thread_specific_errno[VG_N_THREADS]; |
| static int thread_specific_h_errno[VG_N_THREADS]; |
| static struct __res_state |
| thread_specific_res_state[VG_N_THREADS]; |
| |
| int* __errno_location ( void ) |
| { |
| int tid; |
| /* ensure_valgrind("__errno_location"); */ |
| VALGRIND_MAGIC_SEQUENCE(tid, 1 /* default */, |
| VG_USERREQ__PTHREAD_GET_THREADID, |
| 0, 0, 0, 0); |
| /* 'cos I'm paranoid ... */ |
| if (tid < 1 || tid >= VG_N_THREADS) |
| barf("__errno_location: invalid ThreadId"); |
| return & thread_specific_errno[tid]; |
| } |
| |
| int* __h_errno_location ( void ) |
| { |
| int tid; |
| /* ensure_valgrind("__h_errno_location"); */ |
| VALGRIND_MAGIC_SEQUENCE(tid, 1 /* default */, |
| VG_USERREQ__PTHREAD_GET_THREADID, |
| 0, 0, 0, 0); |
| /* 'cos I'm paranoid ... */ |
| if (tid < 1 || tid >= VG_N_THREADS) |
| barf("__h_errno_location: invalid ThreadId"); |
| return & thread_specific_h_errno[tid]; |
| } |
| |
| struct __res_state* __res_state ( void ) |
| { |
| int tid; |
| /* ensure_valgrind("__res_state"); */ |
| VALGRIND_MAGIC_SEQUENCE(tid, 1 /* default */, |
| VG_USERREQ__PTHREAD_GET_THREADID, |
| 0, 0, 0, 0); |
| /* 'cos I'm paranoid ... */ |
| if (tid < 1 || tid >= VG_N_THREADS) |
| barf("__res_state: invalid ThreadId"); |
| return & thread_specific_res_state[tid]; |
| } |
| |
| |
| /* --------------------------------------------------- |
| LIBC-PRIVATE SPECIFIC DATA |
| ------------------------------------------------ */ |
| |
| /* Relies on assumption that initial private data is NULL. This |
| should be fixed somehow. */ |
| |
| /* The allowable keys (indices) (all 2 of them). |
| From sysdeps/pthread/bits/libc-tsd.h |
| */ |
| #define N_LIBC_TSD_EXTRA_KEYS 1 |
| |
| enum __libc_tsd_key_t { _LIBC_TSD_KEY_MALLOC = 0, |
| _LIBC_TSD_KEY_DL_ERROR, |
| _LIBC_TSD_KEY_N }; |
| |
| /* Auto-initialising subsystem. libc_specifics_inited is set |
| after initialisation. libc_specifics_inited_mx guards it. */ |
| static int libc_specifics_inited = 0; |
| static pthread_mutex_t libc_specifics_inited_mx = PTHREAD_MUTEX_INITIALIZER; |
| |
| /* These are the keys we must initialise the first time. */ |
| static pthread_key_t libc_specifics_keys[_LIBC_TSD_KEY_N |
| + N_LIBC_TSD_EXTRA_KEYS]; |
| |
| /* Initialise the keys, if they are not already initialise. */ |
| static |
| void init_libc_tsd_keys ( void ) |
| { |
| int res, i; |
| pthread_key_t k; |
| |
| res = pthread_mutex_lock(&libc_specifics_inited_mx); |
| if (res != 0) barf("init_libc_tsd_keys: lock"); |
| |
| if (libc_specifics_inited == 0) { |
| /* printf("INIT libc specifics\n"); */ |
| libc_specifics_inited = 1; |
| for (i = 0; i < _LIBC_TSD_KEY_N + N_LIBC_TSD_EXTRA_KEYS; i++) { |
| res = pthread_key_create(&k, NULL); |
| if (res != 0) barf("init_libc_tsd_keys: create"); |
| libc_specifics_keys[i] = k; |
| } |
| } |
| |
| res = pthread_mutex_unlock(&libc_specifics_inited_mx); |
| if (res != 0) barf("init_libc_tsd_keys: unlock"); |
| } |
| |
| |
| static int |
| libc_internal_tsd_set ( enum __libc_tsd_key_t key, |
| const void * pointer ) |
| { |
| int res; |
| static int moans = N_MOANS; |
| /* printf("SET SET SET key %d ptr %p\n", key, pointer); */ |
| if (key < _LIBC_TSD_KEY_MALLOC |
| || key >= _LIBC_TSD_KEY_N + N_LIBC_TSD_EXTRA_KEYS) |
| barf("libc_internal_tsd_set: invalid key"); |
| if (key >= _LIBC_TSD_KEY_N && moans-- > 0) |
| fprintf(stderr, |
| "valgrind's libpthread.so: libc_internal_tsd_set: " |
| "dubious key %d\n", key); |
| init_libc_tsd_keys(); |
| res = pthread_setspecific(libc_specifics_keys[key], pointer); |
| if (res != 0) barf("libc_internal_tsd_set: setspecific failed"); |
| return 0; |
| } |
| |
| static void * |
| libc_internal_tsd_get ( enum __libc_tsd_key_t key ) |
| { |
| void* v; |
| static int moans = N_MOANS; |
| /* printf("GET GET GET key %d\n", key); */ |
| if (key < _LIBC_TSD_KEY_MALLOC |
| || key >= _LIBC_TSD_KEY_N + N_LIBC_TSD_EXTRA_KEYS) |
| barf("libc_internal_tsd_get: invalid key"); |
| if (key >= _LIBC_TSD_KEY_N && moans-- > 0) |
| fprintf(stderr, |
| "valgrind's libpthread.so: libc_internal_tsd_get: " |
| "dubious key %d\n", key); |
| init_libc_tsd_keys(); |
| v = pthread_getspecific(libc_specifics_keys[key]); |
| /* if (v == NULL) barf("libc_internal_tsd_set: getspecific failed"); */ |
| return v; |
| } |
| |
| |
| |
| |
| int (*__libc_internal_tsd_set) |
| (enum __libc_tsd_key_t key, const void * pointer) |
| = libc_internal_tsd_set; |
| |
| void* (*__libc_internal_tsd_get) |
| (enum __libc_tsd_key_t key) |
| = libc_internal_tsd_get; |
| |
| |
| /* --------------------------------------------------------------------- |
| These are here (I think) because they are deemed cancellation |
| points by POSIX. For the moment we'll simply pass the call along |
| to the corresponding thread-unaware (?) libc routine. |
| ------------------------------------------------------------------ */ |
| |
| #include <stdlib.h> |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| |
| #ifdef GLIBC_2_1 |
| extern |
| int __sigaction |
| (int signum, |
| const struct sigaction *act, |
| struct sigaction *oldact); |
| #else |
| extern |
| int __libc_sigaction |
| (int signum, |
| const struct sigaction *act, |
| struct sigaction *oldact); |
| #endif |
| int sigaction(int signum, |
| const struct sigaction *act, |
| struct sigaction *oldact) |
| { |
| # ifdef GLIBC_2_1 |
| return __sigaction(signum, act, oldact); |
| # else |
| return __libc_sigaction(signum, act, oldact); |
| # endif |
| } |
| |
| |
| extern |
| int __libc_connect(int sockfd, |
| const struct sockaddr *serv_addr, |
| socklen_t addrlen); |
| __attribute__((weak)) |
| int connect(int sockfd, |
| const struct sockaddr *serv_addr, |
| socklen_t addrlen) |
| { |
| return __libc_connect(sockfd, serv_addr, addrlen); |
| } |
| |
| |
| extern |
| int __libc_fcntl(int fd, int cmd, long arg); |
| __attribute__((weak)) |
| int fcntl(int fd, int cmd, long arg) |
| { |
| return __libc_fcntl(fd, cmd, arg); |
| } |
| |
| |
| extern |
| ssize_t __libc_write(int fd, const void *buf, size_t count); |
| __attribute__((weak)) |
| ssize_t write(int fd, const void *buf, size_t count) |
| { |
| return __libc_write(fd, buf, count); |
| } |
| |
| |
| extern |
| ssize_t __libc_read(int fd, void *buf, size_t count); |
| __attribute__((weak)) |
| ssize_t read(int fd, void *buf, size_t count) |
| { |
| return __libc_read(fd, buf, count); |
| } |
| |
| |
| extern |
| int __libc_open64(const char *pathname, int flags, mode_t mode); |
| __attribute__((weak)) |
| int open64(const char *pathname, int flags, mode_t mode) |
| { |
| return __libc_open64(pathname, flags, mode); |
| } |
| |
| |
| extern |
| int __libc_open(const char *pathname, int flags, mode_t mode); |
| __attribute__((weak)) |
| int open(const char *pathname, int flags, mode_t mode) |
| { |
| return __libc_open(pathname, flags, mode); |
| } |
| |
| |
| extern |
| int __libc_close(int fd); |
| __attribute__((weak)) |
| int close(int fd) |
| { |
| return __libc_close(fd); |
| } |
| |
| |
| extern |
| int __libc_accept(int s, struct sockaddr *addr, socklen_t *addrlen); |
| __attribute__((weak)) |
| int accept(int s, struct sockaddr *addr, socklen_t *addrlen) |
| { |
| return __libc_accept(s, addr, addrlen); |
| } |
| |
| |
| extern |
| pid_t __libc_fork(void); |
| pid_t __fork(void) |
| { |
| return __libc_fork(); |
| } |
| |
| |
| extern |
| pid_t __libc_waitpid(pid_t pid, int *status, int options); |
| __attribute__((weak)) |
| pid_t waitpid(pid_t pid, int *status, int options) |
| { |
| return __libc_waitpid(pid, status, options); |
| } |
| |
| |
| extern |
| int __libc_nanosleep(const struct timespec *req, struct timespec *rem); |
| __attribute__((weak)) |
| int nanosleep(const struct timespec *req, struct timespec *rem) |
| { |
| return __libc_nanosleep(req, rem); |
| } |
| |
| |
| extern |
| int __libc_fsync(int fd); |
| __attribute__((weak)) |
| int fsync(int fd) |
| { |
| return __libc_fsync(fd); |
| } |
| |
| |
| extern |
| off_t __libc_lseek(int fildes, off_t offset, int whence); |
| __attribute__((weak)) |
| off_t lseek(int fildes, off_t offset, int whence) |
| { |
| return __libc_lseek(fildes, offset, whence); |
| } |
| |
| |
| extern |
| __off64_t __libc_lseek64(int fildes, __off64_t offset, int whence); |
| __attribute__((weak)) |
| __off64_t lseek64(int fildes, __off64_t offset, int whence) |
| { |
| return __libc_lseek64(fildes, offset, whence); |
| } |
| |
| |
| extern |
| void __libc_longjmp(jmp_buf env, int val) __attribute((noreturn)); |
| /* not weak: __attribute__((weak)) */ |
| void longjmp(jmp_buf env, int val) |
| { |
| __libc_longjmp(env, val); |
| } |
| |
| |
| extern |
| int __libc_send(int s, const void *msg, size_t len, int flags); |
| __attribute__((weak)) |
| int send(int s, const void *msg, size_t len, int flags) |
| { |
| return __libc_send(s, msg, len, flags); |
| } |
| |
| |
| extern |
| int __libc_recv(int s, void *buf, size_t len, int flags); |
| __attribute__((weak)) |
| int recv(int s, void *buf, size_t len, int flags) |
| { |
| return __libc_recv(s, buf, len, flags); |
| } |
| |
| |
| extern |
| int __libc_sendmsg(int s, const struct msghdr *msg, int flags); |
| __attribute__((weak)) |
| int sendmsg(int s, const struct msghdr *msg, int flags) |
| { |
| return __libc_sendmsg(s, msg, flags); |
| } |
| |
| |
| extern |
| int __libc_recvfrom(int s, void *buf, size_t len, int flags, |
| struct sockaddr *from, socklen_t *fromlen); |
| __attribute__((weak)) |
| int recvfrom(int s, void *buf, size_t len, int flags, |
| struct sockaddr *from, socklen_t *fromlen) |
| { |
| return __libc_recvfrom(s, buf, len, flags, from, fromlen); |
| } |
| |
| |
| extern |
| int __libc_sendto(int s, const void *msg, size_t len, int flags, |
| const struct sockaddr *to, socklen_t tolen); |
| __attribute__((weak)) |
| int sendto(int s, const void *msg, size_t len, int flags, |
| const struct sockaddr *to, socklen_t tolen) |
| { |
| return __libc_sendto(s, msg, len, flags, to, tolen); |
| } |
| |
| |
| extern |
| int __libc_system(const char* str); |
| __attribute__((weak)) |
| int system(const char* str) |
| { |
| return __libc_system(str); |
| } |
| |
| |
| extern |
| pid_t __libc_wait(int *status); |
| __attribute__((weak)) |
| pid_t wait(int *status) |
| { |
| return __libc_wait(status); |
| } |
| |
| |
| |
| /* --------------------------------------------------------------------- |
| Nonblocking implementations of select() and poll(). This stuff will |
| surely rot your mind. |
| ------------------------------------------------------------------ */ |
| |
| /*--------------------------------------------------*/ |
| |
| #include "vg_kerneliface.h" |
| |
| static |
| __inline__ |
| int is_kerror ( int res ) |
| { |
| if (res >= -4095 && res <= -1) |
| return 1; |
| else |
| return 0; |
| } |
| |
| |
| static |
| int my_do_syscall1 ( int syscallno, int arg1 ) |
| { |
| int __res; |
| __asm__ volatile ("pushl %%ebx; movl %%edx,%%ebx ; int $0x80 ; popl %%ebx" |
| : "=a" (__res) |
| : "0" (syscallno), |
| "d" (arg1) ); |
| return __res; |
| } |
| |
| static |
| int my_do_syscall2 ( int syscallno, |
| int arg1, int arg2 ) |
| { |
| int __res; |
| __asm__ volatile ("pushl %%ebx; movl %%edx,%%ebx ; int $0x80 ; popl %%ebx" |
| : "=a" (__res) |
| : "0" (syscallno), |
| "d" (arg1), |
| "c" (arg2) ); |
| return __res; |
| } |
| |
| static |
| int my_do_syscall3 ( int syscallno, |
| int arg1, int arg2, int arg3 ) |
| { |
| int __res; |
| __asm__ volatile ("pushl %%ebx; movl %%esi,%%ebx ; int $0x80 ; popl %%ebx" |
| : "=a" (__res) |
| : "0" (syscallno), |
| "S" (arg1), |
| "c" (arg2), |
| "d" (arg3) ); |
| return __res; |
| } |
| |
| static |
| int do_syscall_select( int n, |
| vki_fd_set* readfds, |
| vki_fd_set* writefds, |
| vki_fd_set* exceptfds, |
| struct vki_timeval * timeout ) |
| { |
| int res; |
| int args[5]; |
| args[0] = n; |
| args[1] = (int)readfds; |
| args[2] = (int)writefds; |
| args[3] = (int)exceptfds; |
| args[4] = (int)timeout; |
| res = my_do_syscall1(__NR_select, (int)(&(args[0])) ); |
| return res; |
| } |
| |
| |
| /* This is a wrapper round select(), which makes it thread-safe, |
| meaning that only this thread will block, rather than the entire |
| process. This wrapper in turn depends on nanosleep() not to block |
| the entire process, but I think (hope? suspect?) that POSIX |
| pthreads guarantees that to be the case. |
| |
| Basic idea is: modify the timeout parameter to select so that it |
| returns immediately. Poll like this until select returns non-zero, |
| indicating something interesting happened, or until our time is up. |
| Space out the polls with nanosleeps of say 20 milliseconds, which |
| is required to be nonblocking; this allows other threads to run. |
| |
| Assumes: |
| * (checked via assert) types fd_set and vki_fd_set are identical. |
| * (checked via assert) types timeval and vki_timeval are identical. |
| * (unchecked) libc error numbers (EINTR etc) are the negation of the |
| kernel's error numbers (VKI_EINTR etc). |
| */ |
| |
| /* __attribute__((weak)) */ |
| int select ( int n, |
| fd_set *rfds, |
| fd_set *wfds, |
| fd_set *xfds, |
| struct timeval *timeout ) |
| { |
| unsigned int ms_now, ms_end; |
| int res; |
| fd_set rfds_copy; |
| fd_set wfds_copy; |
| fd_set xfds_copy; |
| struct vki_timeval t_now; |
| struct vki_timeval zero_timeout; |
| struct vki_timespec nanosleep_interval; |
| |
| /* gcc's complains about ms_end being used uninitialised -- classic |
| case it can't understand, where ms_end is both defined and used |
| only if timeout != NULL. Hence ... */ |
| ms_end = 0; |
| |
| /* We assume that the kernel and libc data layouts are identical |
| for the following types. These asserts provide a crude |
| check. */ |
| if (sizeof(fd_set) != sizeof(vki_fd_set) |
| || sizeof(struct timeval) != sizeof(struct vki_timeval)) |
| barf("valgrind's hacky non-blocking select(): data sizes error"); |
| |
| /* Detect the current time and simultaneously find out if we are |
| running on Valgrind. */ |
| VALGRIND_MAGIC_SEQUENCE(ms_now, 0xFFFFFFFF /* default */, |
| VG_USERREQ__READ_MILLISECOND_TIMER, |
| 0, 0, 0, 0); |
| |
| /* If a zero timeout specified, this call is harmless. Also go |
| this route if we're not running on Valgrind, for whatever |
| reason. */ |
| if ( (timeout && timeout->tv_sec == 0 && timeout->tv_usec == 0) |
| || (ms_now == 0xFFFFFFFF) ) { |
| res = do_syscall_select( n, (vki_fd_set*)rfds, |
| (vki_fd_set*)wfds, |
| (vki_fd_set*)xfds, |
| (struct vki_timeval*)timeout); |
| if (is_kerror(res)) { |
| * (__errno_location()) = -res; |
| return -1; |
| } else { |
| return res; |
| } |
| } |
| |
| /* If a timeout was specified, set ms_end to be the end millisecond |
| counter [wallclock] time. */ |
| if (timeout) { |
| res = my_do_syscall2(__NR_gettimeofday, (int)&t_now, (int)NULL); |
| assert(res == 0); |
| ms_end = ms_now; |
| ms_end += (timeout->tv_usec / 1000); |
| ms_end += (timeout->tv_sec * 1000); |
| /* Stay sane ... */ |
| assert (ms_end >= ms_now); |
| } |
| |
| /* fprintf(stderr, "MY_SELECT: before loop\n"); */ |
| |
| /* Either timeout == NULL, meaning wait indefinitely, or timeout != |
| NULL, in which case ms_end holds the end time. */ |
| while (1) { |
| if (timeout) { |
| VALGRIND_MAGIC_SEQUENCE(ms_now, 0xFFFFFFFF /* default */, |
| VG_USERREQ__READ_MILLISECOND_TIMER, |
| 0, 0, 0, 0); |
| assert(ms_now != 0xFFFFFFFF); |
| if (ms_now >= ms_end) { |
| /* timeout; nothing interesting happened. */ |
| if (rfds) FD_ZERO(rfds); |
| if (wfds) FD_ZERO(wfds); |
| if (xfds) FD_ZERO(xfds); |
| return 0; |
| } |
| } |
| |
| /* These could be trashed each time round the loop, so restore |
| them each time. */ |
| if (rfds) rfds_copy = *rfds; |
| if (wfds) wfds_copy = *wfds; |
| if (xfds) xfds_copy = *xfds; |
| |
| zero_timeout.tv_sec = zero_timeout.tv_usec = 0; |
| |
| res = do_syscall_select( n, |
| rfds ? (vki_fd_set*)(&rfds_copy) : NULL, |
| wfds ? (vki_fd_set*)(&wfds_copy) : NULL, |
| xfds ? (vki_fd_set*)(&xfds_copy) : NULL, |
| & zero_timeout ); |
| if (is_kerror(res)) { |
| /* Some kind of error (including EINTR). Set errno and |
| return. The sets are unspecified in this case. */ |
| * (__errno_location()) = -res; |
| return -1; |
| } |
| if (res > 0) { |
| /* one or more fds is ready. Copy out resulting sets and |
| return. */ |
| if (rfds) *rfds = rfds_copy; |
| if (wfds) *wfds = wfds_copy; |
| if (xfds) *xfds = xfds_copy; |
| return res; |
| } |
| /* fprintf(stderr, "MY_SELECT: nanosleep\n"); */ |
| /* nanosleep and go round again */ |
| nanosleep_interval.tv_sec = 0; |
| nanosleep_interval.tv_nsec = 50 * 1000 * 1000; /* 50 milliseconds */ |
| /* It's critical here that valgrind's nanosleep implementation |
| is nonblocking. */ |
| (void)my_do_syscall2(__NR_nanosleep, |
| (int)(&nanosleep_interval), (int)NULL); |
| } |
| } |
| |
| |
| |
| |
| #include <sys/poll.h> |
| |
| #ifdef GLIBC_2_1 |
| typedef unsigned long int nfds_t; |
| #endif |
| |
| /* __attribute__((weak)) */ |
| int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout) |
| { |
| unsigned int ms_now, ms_end; |
| int res, i; |
| struct vki_timespec nanosleep_interval; |
| |
| ensure_valgrind("poll"); |
| |
| /* Detect the current time and simultaneously find out if we are |
| running on Valgrind. */ |
| VALGRIND_MAGIC_SEQUENCE(ms_now, 0xFFFFFFFF /* default */, |
| VG_USERREQ__READ_MILLISECOND_TIMER, |
| 0, 0, 0, 0); |
| |
| if (/* CHECK SIZES FOR struct pollfd */ |
| sizeof(struct timeval) != sizeof(struct vki_timeval)) |
| barf("valgrind's hacky non-blocking poll(): data sizes error"); |
| |
| /* dummy initialisation to keep gcc -Wall happy */ |
| ms_end = 0; |
| |
| /* If a zero timeout specified, this call is harmless. Also do |
| this if not running on Valgrind. */ |
| if (__timeout == 0 || ms_now == 0xFFFFFFFF) { |
| res = my_do_syscall3(__NR_poll, (int)__fds, __nfds, __timeout); |
| if (is_kerror(res)) { |
| * (__errno_location()) = -res; |
| return -1; |
| } else { |
| return res; |
| } |
| } |
| |
| /* If a timeout was specified, set ms_end to be the end wallclock |
| time. Easy considering that __timeout is in milliseconds. */ |
| if (__timeout > 0) { |
| ms_end = ms_now + (unsigned int)__timeout; |
| } |
| |
| /* fprintf(stderr, "MY_POLL: before loop\n"); */ |
| |
| /* Either timeout < 0, meaning wait indefinitely, or timeout > 0, |
| in which case t_end holds the end time. */ |
| assert(__timeout != 0); |
| |
| while (1) { |
| if (__timeout > 0) { |
| VALGRIND_MAGIC_SEQUENCE(ms_now, 0xFFFFFFFF /* default */, |
| VG_USERREQ__READ_MILLISECOND_TIMER, |
| 0, 0, 0, 0); |
| assert(ms_now != 0xFFFFFFFF); |
| if (ms_now >= ms_end) { |
| /* timeout; nothing interesting happened. */ |
| for (i = 0; i < __nfds; i++) |
| __fds[i].revents = 0; |
| return 0; |
| } |
| } |
| |
| /* Do a return-immediately poll. */ |
| res = my_do_syscall3(__NR_poll, (int)__fds, __nfds, 0 ); |
| if (is_kerror(res)) { |
| /* Some kind of error. Set errno and return. */ |
| * (__errno_location()) = -res; |
| return -1; |
| } |
| if (res > 0) { |
| /* One or more fds is ready. Return now. */ |
| return res; |
| } |
| /* fprintf(stderr, "MY_POLL: nanosleep\n"); */ |
| /* nanosleep and go round again */ |
| nanosleep_interval.tv_sec = 0; |
| nanosleep_interval.tv_nsec = 51 * 1000 * 1000; /* 51 milliseconds */ |
| /* It's critical here that valgrind's nanosleep implementation |
| is nonblocking. */ |
| (void)my_do_syscall2(__NR_nanosleep, |
| (int)(&nanosleep_interval), (int)NULL); |
| } |
| } |
| |
| |
| /* --------------------------------------------------------------------- |
| B'stard. |
| ------------------------------------------------------------------ */ |
| |
| # define strong_alias(name, aliasname) \ |
| extern __typeof (name) aliasname __attribute__ ((alias (#name))); |
| |
| # define weak_alias(name, aliasname) \ |
| extern __typeof (name) aliasname __attribute__ ((weak, alias (#name))); |
| |
| strong_alias(__pthread_mutex_lock, pthread_mutex_lock) |
| strong_alias(__pthread_mutex_trylock, pthread_mutex_trylock) |
| strong_alias(__pthread_mutex_unlock, pthread_mutex_unlock) |
| strong_alias(__pthread_mutexattr_init, pthread_mutexattr_init) |
| weak_alias(__pthread_mutexattr_settype, pthread_mutexattr_settype) |
| strong_alias(__pthread_mutex_init, pthread_mutex_init) |
| strong_alias(__pthread_mutexattr_destroy, pthread_mutexattr_destroy) |
| strong_alias(__pthread_mutex_destroy, pthread_mutex_destroy) |
| strong_alias(__pthread_once, pthread_once) |
| strong_alias(__pthread_atfork, pthread_atfork) |
| strong_alias(__pthread_key_create, pthread_key_create) |
| strong_alias(__pthread_getspecific, pthread_getspecific) |
| strong_alias(__pthread_setspecific, pthread_setspecific) |
| |
| #ifndef GLIBC_2_1 |
| strong_alias(sigaction, __sigaction) |
| #endif |
| |
| strong_alias(close, __close) |
| strong_alias(fcntl, __fcntl) |
| strong_alias(lseek, __lseek) |
| strong_alias(open, __open) |
| strong_alias(open64, __open64) |
| //strong_alias(pread64, __pread64) |
| //strong_alias(pwrite64, __pwrite64) |
| strong_alias(read, __read) |
| strong_alias(wait, __wait) |
| strong_alias(write, __write) |
| strong_alias(connect, __connect) |
| strong_alias(send, __send) |
| |
| weak_alias(__fork, fork) |
| //weak_alias(__vfork, vfork) |
| |
| |
| /*--------------------------------------------------*/ |
| |
| int |
| pthread_rwlock_rdlock (void* /* pthread_rwlock_t* */ rwlock) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| kludged("pthread_rwlock_rdlock"); |
| return 0; |
| } |
| |
| weak_alias(pthread_rwlock_rdlock, __pthread_rwlock_rdlock) |
| |
| |
| int |
| pthread_rwlock_unlock (void* /* pthread_rwlock_t* */ rwlock) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| kludged("pthread_rwlock_unlock"); |
| return 0; |
| } |
| |
| weak_alias(pthread_rwlock_unlock, __pthread_rwlock_unlock) |
| |
| |
| int |
| pthread_rwlock_wrlock (void* /* pthread_rwlock_t* */ rwlock) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| kludged("pthread_rwlock_wrlock"); |
| return 0; |
| } |
| |
| weak_alias(pthread_rwlock_wrlock, __pthread_rwlock_wrlock) |
| |
| |
| /* I've no idea what these are, but they get called quite a lot. |
| Anybody know? */ |
| |
| #undef _IO_flockfile |
| void _IO_flockfile ( _IO_FILE * file ) |
| { |
| pthread_mutex_lock(file->_lock); |
| } |
| weak_alias(_IO_flockfile, flockfile); |
| |
| |
| #undef _IO_funlockfile |
| void _IO_funlockfile ( _IO_FILE * file ) |
| { |
| pthread_mutex_unlock(file->_lock); |
| } |
| weak_alias(_IO_funlockfile, funlockfile); |
| |
| |
| void _pthread_cleanup_push_defer ( void ) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| ignored("_pthread_cleanup_push_defer"); |
| } |
| |
| void _pthread_cleanup_pop_restore ( void ) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| ignored("_pthread_cleanup_pop_restore"); |
| } |
| |
| /*--------*/ |
| void _pthread_cleanup_push (struct _pthread_cleanup_buffer *__buffer, |
| void (*__routine) (void *), |
| void *__arg) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) |
| ignored("_pthread_cleanup_push"); |
| } |
| |
| void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *__buffer, |
| int __execute) |
| { |
| static int moans = N_MOANS; |
| if (moans-- > 0) { |
| if (__execute) |
| ignored("_pthread_cleanup_pop-EXECUTE"); |
| else |
| ignored("_pthread_cleanup_pop-NO-EXECUTE"); |
| } |
| } |
| |
| |
| /* This doesn't seem to be needed to simulate libpthread.so's external |
| interface, but many people complain about its absence. */ |
| |
| strong_alias(__pthread_mutexattr_settype, __pthread_mutexattr_setkind_np) |
| weak_alias(__pthread_mutexattr_setkind_np, pthread_mutexattr_setkind_np) |
| |
| |
| /*--------------------------------------------------------------------*/ |
| /*--- end vg_libpthread.c ---*/ |
| /*--------------------------------------------------------------------*/ |