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Diffstat (limited to 'lib/tsan/rtl/tsan_interceptors.cc')
| -rw-r--r-- | lib/tsan/rtl/tsan_interceptors.cc | 1596 |
1 files changed, 1596 insertions, 0 deletions
diff --git a/lib/tsan/rtl/tsan_interceptors.cc b/lib/tsan/rtl/tsan_interceptors.cc new file mode 100644 index 0000000..a962250 --- /dev/null +++ b/lib/tsan/rtl/tsan_interceptors.cc @@ -0,0 +1,1596 @@ +//===-- tsan_interceptors_linux.cc ----------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of ThreadSanitizer (TSan), a race detector. +// +//===----------------------------------------------------------------------===// + +#include "interception/interception.h" +#include "sanitizer_common/sanitizer_atomic.h" +#include "sanitizer_common/sanitizer_libc.h" +#include "sanitizer_common/sanitizer_placement_new.h" +#include "tsan_rtl.h" +#include "tsan_interface.h" +#include "tsan_platform.h" +#include "tsan_mman.h" + +using namespace __tsan; // NOLINT + +const int kSigCount = 128; + +struct my_siginfo_t { + int opaque[128]; +}; + +struct sigset_t { + u64 val[1024 / 8 / sizeof(u64)]; +}; + +struct ucontext_t { + uptr opaque[117]; +}; + +extern "C" int pthread_attr_init(void *attr); +extern "C" int pthread_attr_destroy(void *attr); +extern "C" int pthread_attr_getdetachstate(void *attr, int *v); +extern "C" int pthread_attr_setstacksize(void *attr, uptr stacksize); +extern "C" int pthread_attr_getstacksize(void *attr, uptr *stacksize); +extern "C" int pthread_key_create(unsigned *key, void (*destructor)(void* v)); +extern "C" int pthread_setspecific(unsigned key, const void *v); +extern "C" int pthread_mutexattr_gettype(void *a, int *type); +extern "C" int pthread_yield(); +extern "C" int pthread_sigmask(int how, const sigset_t *set, sigset_t *oldset); +extern "C" int sigfillset(sigset_t *set); +extern "C" void *pthread_self(); +extern "C" void _exit(int status); +extern "C" int __cxa_atexit(void (*func)(void *arg), void *arg, void *dso); +extern "C" int *__errno_location(); +extern "C" int usleep(unsigned usec); +const int PTHREAD_MUTEX_RECURSIVE = 1; +const int PTHREAD_MUTEX_RECURSIVE_NP = 1; +const int kPthreadAttrSize = 56; +const int EINVAL = 22; +const int EBUSY = 16; +const int EPOLL_CTL_ADD = 1; +const int SIGILL = 4; +const int SIGABRT = 6; +const int SIGFPE = 8; +const int SIGSEGV = 11; +const int SIGPIPE = 13; +const int SIGBUS = 7; +void *const MAP_FAILED = (void*)-1; +const int PTHREAD_BARRIER_SERIAL_THREAD = -1; +const int MAP_FIXED = 0x10; +typedef long long_t; // NOLINT + +typedef void (*sighandler_t)(int sig); + +#define errno (*__errno_location()) + +union pthread_attr_t { + char size[kPthreadAttrSize]; + void *align; +}; + +struct sigaction_t { + union { + sighandler_t sa_handler; + void (*sa_sigaction)(int sig, my_siginfo_t *siginfo, void *uctx); + }; + sigset_t sa_mask; + int sa_flags; + void (*sa_restorer)(); +}; + +const sighandler_t SIG_DFL = (sighandler_t)0; +const sighandler_t SIG_IGN = (sighandler_t)1; +const sighandler_t SIG_ERR = (sighandler_t)-1; +const int SA_SIGINFO = 4; +const int SIG_SETMASK = 2; + +static sigaction_t sigactions[kSigCount]; + +namespace __tsan { +struct SignalDesc { + bool armed; + bool sigaction; + my_siginfo_t siginfo; + ucontext_t ctx; +}; + +struct SignalContext { + int int_signal_send; + int pending_signal_count; + SignalDesc pending_signals[kSigCount]; +}; +} + +static SignalContext *SigCtx(ThreadState *thr) { + SignalContext *ctx = (SignalContext*)thr->signal_ctx; + if (ctx == 0 && thr->is_alive) { + ScopedInRtl in_rtl; + ctx = (SignalContext*)internal_alloc( + MBlockSignal, sizeof(*ctx)); + MemoryResetRange(thr, 0, (uptr)ctx, sizeof(*ctx)); + internal_memset(ctx, 0, sizeof(*ctx)); + thr->signal_ctx = ctx; + } + return ctx; +} + +static unsigned g_thread_finalize_key; + +static void process_pending_signals(ThreadState *thr); + +class ScopedInterceptor { + public: + ScopedInterceptor(ThreadState *thr, const char *fname, uptr pc) + : thr_(thr) + , in_rtl_(thr->in_rtl) { + if (thr_->in_rtl == 0) { + Initialize(thr); + FuncEntry(thr, pc); + thr_->in_rtl++; + DPrintf("#%d: intercept %s()\n", thr_->tid, fname); + } else { + thr_->in_rtl++; + } + } + + ~ScopedInterceptor() { + thr_->in_rtl--; + if (thr_->in_rtl == 0) { + FuncExit(thr_); + process_pending_signals(thr_); + } + CHECK_EQ(in_rtl_, thr_->in_rtl); + } + + private: + ThreadState *const thr_; + const int in_rtl_; +}; + +#define SCOPED_INTERCEPTOR_RAW(func, ...) \ + ThreadState *thr = cur_thread(); \ + StatInc(thr, StatInterceptor); \ + StatInc(thr, StatInt_##func); \ + ScopedInterceptor si(thr, #func, \ + (__sanitizer::uptr)__builtin_return_address(0)); \ + const uptr pc = (uptr)&func; \ + (void)pc; \ +/**/ + +#define SCOPED_TSAN_INTERCEPTOR(func, ...) \ + SCOPED_INTERCEPTOR_RAW(func, __VA_ARGS__); \ + if (thr->in_rtl > 1) \ + return REAL(func)(__VA_ARGS__); \ +/**/ + +#define SCOPED_INTERCEPTOR_LIBC(func, ...) \ + ThreadState *thr = cur_thread(); \ + StatInc(thr, StatInterceptor); \ + StatInc(thr, StatInt_##func); \ + ScopedInterceptor si(thr, #func, callpc); \ + const uptr pc = (uptr)&func; \ + (void)pc; \ + if (thr->in_rtl > 1) \ + return REAL(func)(__VA_ARGS__); \ +/**/ + +#define TSAN_INTERCEPTOR(ret, func, ...) INTERCEPTOR(ret, func, __VA_ARGS__) +#define TSAN_INTERCEPT(func) INTERCEPT_FUNCTION(func) + +// May be overriden by front-end. +extern "C" void WEAK __tsan_malloc_hook(void *ptr, uptr size) { + (void)ptr; + (void)size; +} + +extern "C" void WEAK __tsan_free_hook(void *ptr) { + (void)ptr; +} + +static void invoke_malloc_hook(void *ptr, uptr size) { + Context *ctx = CTX(); + ThreadState *thr = cur_thread(); + if (ctx == 0 || !ctx->initialized || thr->in_rtl) + return; + __tsan_malloc_hook(ptr, size); +} + +static void invoke_free_hook(void *ptr) { + Context *ctx = CTX(); + ThreadState *thr = cur_thread(); + if (ctx == 0 || !ctx->initialized || thr->in_rtl) + return; + __tsan_free_hook(ptr); +} + +class AtExitContext { + public: + AtExitContext() + : mtx_(MutexTypeAtExit, StatMtxAtExit) + , pos_() { + } + + typedef void(*atexit_t)(); + + int atexit(ThreadState *thr, uptr pc, atexit_t f) { + Lock l(&mtx_); + if (pos_ == kMaxAtExit) + return 1; + Release(thr, pc, (uptr)this); + stack_[pos_] = f; + pos_++; + return 0; + } + + void exit(ThreadState *thr, uptr pc) { + CHECK_EQ(thr->in_rtl, 0); + for (;;) { + atexit_t f = 0; + { + Lock l(&mtx_); + if (pos_) { + pos_--; + f = stack_[pos_]; + ScopedInRtl in_rtl; + Acquire(thr, pc, (uptr)this); + } + } + if (f == 0) + break; + DPrintf("#%d: executing atexit func %p\n", thr->tid, f); + CHECK_EQ(thr->in_rtl, 0); + f(); + } + } + + private: + static const int kMaxAtExit = 128; + Mutex mtx_; + atexit_t stack_[kMaxAtExit]; + int pos_; +}; + +static AtExitContext *atexit_ctx; + +static void finalize(void *arg) { + ThreadState * thr = cur_thread(); + uptr pc = 0; + atexit_ctx->exit(thr, pc); + { + ScopedInRtl in_rtl; + DestroyAndFree(atexit_ctx); + usleep(flags()->atexit_sleep_ms * 1000); + } + int status = Finalize(cur_thread()); + if (status) + _exit(status); +} + +TSAN_INTERCEPTOR(int, atexit, void (*f)()) { + SCOPED_TSAN_INTERCEPTOR(atexit, f); + return atexit_ctx->atexit(thr, pc, f); + return 0; +} + +TSAN_INTERCEPTOR(void, longjmp, void *env, int val) { + SCOPED_TSAN_INTERCEPTOR(longjmp, env, val); + TsanPrintf("ThreadSanitizer: longjmp() is not supported\n"); + Die(); +} + +TSAN_INTERCEPTOR(void, siglongjmp, void *env, int val) { + SCOPED_TSAN_INTERCEPTOR(siglongjmp, env, val); + TsanPrintf("ThreadSanitizer: siglongjmp() is not supported\n"); + Die(); +} + +static uptr fd2addr(int fd) { + (void)fd; + static u64 addr; + return (uptr)&addr; +} + +static uptr epollfd2addr(int fd) { + (void)fd; + static u64 addr; + return (uptr)&addr; +} + +static uptr file2addr(char *path) { + (void)path; + static u64 addr; + return (uptr)&addr; +} + +static uptr dir2addr(char *path) { + (void)path; + static u64 addr; + return (uptr)&addr; +} + +TSAN_INTERCEPTOR(void*, malloc, uptr size) { + void *p = 0; + { + SCOPED_INTERCEPTOR_RAW(malloc, size); + p = user_alloc(thr, pc, size); + } + invoke_malloc_hook(p, size); + return p; +} + +TSAN_INTERCEPTOR(void*, calloc, uptr size, uptr n) { + void *p = 0; + { + SCOPED_INTERCEPTOR_RAW(calloc, size, n); + p = user_alloc(thr, pc, n * size); + internal_memset(p, 0, n * size); + } + invoke_malloc_hook(p, n * size); + return p; +} + +TSAN_INTERCEPTOR(void*, realloc, void *p, uptr size) { + if (p) + invoke_free_hook(p); + { + SCOPED_INTERCEPTOR_RAW(realloc, p, size); + p = user_realloc(thr, pc, p, size); + } + invoke_malloc_hook(p, size); + return p; +} + +TSAN_INTERCEPTOR(void, free, void *p) { + if (p == 0) + return; + invoke_free_hook(p); + SCOPED_INTERCEPTOR_RAW(free, p); + user_free(thr, pc, p); +} + +TSAN_INTERCEPTOR(void, cfree, void *p) { + if (p == 0) + return; + invoke_free_hook(p); + SCOPED_INTERCEPTOR_RAW(cfree, p); + user_free(thr, pc, p); +} + +TSAN_INTERCEPTOR(uptr, strlen, const char *s) { + SCOPED_TSAN_INTERCEPTOR(strlen, s); + uptr len = internal_strlen(s); + MemoryAccessRange(thr, pc, (uptr)s, len + 1, false); + return len; +} + +TSAN_INTERCEPTOR(void*, memset, void *dst, int v, uptr size) { + SCOPED_TSAN_INTERCEPTOR(memset, dst, v, size); + MemoryAccessRange(thr, pc, (uptr)dst, size, true); + return internal_memset(dst, v, size); +} + +TSAN_INTERCEPTOR(void*, memcpy, void *dst, const void *src, uptr size) { + SCOPED_TSAN_INTERCEPTOR(memcpy, dst, src, size); + MemoryAccessRange(thr, pc, (uptr)dst, size, true); + MemoryAccessRange(thr, pc, (uptr)src, size, false); + return internal_memcpy(dst, src, size); +} + +TSAN_INTERCEPTOR(int, memcmp, const void *s1, const void *s2, uptr n) { + SCOPED_TSAN_INTERCEPTOR(memcmp, s1, s2, n); + int res = 0; + uptr len = 0; + for (; len < n; len++) { + if ((res = ((unsigned char*)s1)[len] - ((unsigned char*)s2)[len])) + break; + } + MemoryAccessRange(thr, pc, (uptr)s1, len < n ? len + 1 : n, false); + MemoryAccessRange(thr, pc, (uptr)s2, len < n ? len + 1 : n, false); + return res; +} + +TSAN_INTERCEPTOR(int, strcmp, const char *s1, const char *s2) { + SCOPED_TSAN_INTERCEPTOR(strcmp, s1, s2); + uptr len = 0; + for (; s1[len] && s2[len]; len++) { + if (s1[len] != s2[len]) + break; + } + MemoryAccessRange(thr, pc, (uptr)s1, len + 1, false); + MemoryAccessRange(thr, pc, (uptr)s2, len + 1, false); + return s1[len] - s2[len]; +} + +TSAN_INTERCEPTOR(int, strncmp, const char *s1, const char *s2, uptr n) { + SCOPED_TSAN_INTERCEPTOR(strncmp, s1, s2, n); + uptr len = 0; + for (; len < n && s1[len] && s2[len]; len++) { + if (s1[len] != s2[len]) + break; + } + MemoryAccessRange(thr, pc, (uptr)s1, len < n ? len + 1 : n, false); + MemoryAccessRange(thr, pc, (uptr)s2, len < n ? len + 1 : n, false); + return len == n ? 0 : s1[len] - s2[len]; +} + +TSAN_INTERCEPTOR(void*, memchr, void *s, int c, uptr n) { + SCOPED_TSAN_INTERCEPTOR(memchr, s, c, n); + void *res = REAL(memchr)(s, c, n); + uptr len = res ? (char*)res - (char*)s + 1 : n; + MemoryAccessRange(thr, pc, (uptr)s, len, false); + return res; +} + +TSAN_INTERCEPTOR(void*, memrchr, char *s, int c, uptr n) { + SCOPED_TSAN_INTERCEPTOR(memrchr, s, c, n); + MemoryAccessRange(thr, pc, (uptr)s, n, false); + return REAL(memrchr)(s, c, n); +} + +TSAN_INTERCEPTOR(void*, memmove, void *dst, void *src, uptr n) { + SCOPED_TSAN_INTERCEPTOR(memmove, dst, src, n); + MemoryAccessRange(thr, pc, (uptr)dst, n, true); + MemoryAccessRange(thr, pc, (uptr)src, n, false); + return REAL(memmove)(dst, src, n); +} + +TSAN_INTERCEPTOR(char*, strchr, char *s, int c) { + SCOPED_TSAN_INTERCEPTOR(strchr, s, c); + char *res = REAL(strchr)(s, c); + uptr len = res ? (char*)res - (char*)s + 1 : internal_strlen(s) + 1; + MemoryAccessRange(thr, pc, (uptr)s, len, false); + return res; +} + +TSAN_INTERCEPTOR(char*, strchrnul, char *s, int c) { + SCOPED_TSAN_INTERCEPTOR(strchrnul, s, c); + char *res = REAL(strchrnul)(s, c); + uptr len = (char*)res - (char*)s + 1; + MemoryAccessRange(thr, pc, (uptr)s, len, false); + return res; +} + +TSAN_INTERCEPTOR(char*, strrchr, char *s, int c) { + SCOPED_TSAN_INTERCEPTOR(strrchr, s, c); + MemoryAccessRange(thr, pc, (uptr)s, internal_strlen(s) + 1, false); + return REAL(strrchr)(s, c); +} + +TSAN_INTERCEPTOR(char*, strcpy, char *dst, const char *src) { // NOLINT + SCOPED_TSAN_INTERCEPTOR(strcpy, dst, src); // NOLINT + uptr srclen = internal_strlen(src); + MemoryAccessRange(thr, pc, (uptr)dst, srclen + 1, true); + MemoryAccessRange(thr, pc, (uptr)src, srclen + 1, false); + return REAL(strcpy)(dst, src); // NOLINT +} + +TSAN_INTERCEPTOR(char*, strncpy, char *dst, char *src, uptr n) { + SCOPED_TSAN_INTERCEPTOR(strncpy, dst, src, n); + uptr srclen = internal_strnlen(src, n); + MemoryAccessRange(thr, pc, (uptr)dst, n, true); + MemoryAccessRange(thr, pc, (uptr)src, min(srclen + 1, n), false); + return REAL(strncpy)(dst, src, n); +} + +TSAN_INTERCEPTOR(const char*, strstr, const char *s1, const char *s2) { + SCOPED_TSAN_INTERCEPTOR(strstr, s1, s2); + const char *res = REAL(strstr)(s1, s2); + uptr len1 = internal_strlen(s1); + uptr len2 = internal_strlen(s2); + MemoryAccessRange(thr, pc, (uptr)s1, len1 + 1, false); + MemoryAccessRange(thr, pc, (uptr)s2, len2 + 1, false); + return res; +} + +static bool fix_mmap_addr(void **addr, long_t sz, int flags) { + if (*addr) { + if (!IsAppMem((uptr)*addr) || !IsAppMem((uptr)*addr + sz - 1)) { + if (flags & MAP_FIXED) { + errno = EINVAL; + return false; + } else { + *addr = 0; + } + } + } + return true; +} + +TSAN_INTERCEPTOR(void*, mmap, void *addr, long_t sz, int prot, + int flags, int fd, unsigned off) { + SCOPED_TSAN_INTERCEPTOR(mmap, addr, sz, prot, flags, fd, off); + if (!fix_mmap_addr(&addr, sz, flags)) + return MAP_FAILED; + void *res = REAL(mmap)(addr, sz, prot, flags, fd, off); + if (res != MAP_FAILED) { + MemoryResetRange(thr, pc, (uptr)res, sz); + } + return res; +} + +TSAN_INTERCEPTOR(void*, mmap64, void *addr, long_t sz, int prot, + int flags, int fd, u64 off) { + SCOPED_TSAN_INTERCEPTOR(mmap64, addr, sz, prot, flags, fd, off); + if (!fix_mmap_addr(&addr, sz, flags)) + return MAP_FAILED; + void *res = REAL(mmap64)(addr, sz, prot, flags, fd, off); + if (res != MAP_FAILED) { + MemoryResetRange(thr, pc, (uptr)res, sz); + } + return res; +} + +TSAN_INTERCEPTOR(int, munmap, void *addr, long_t sz) { + SCOPED_TSAN_INTERCEPTOR(munmap, addr, sz); + int res = REAL(munmap)(addr, sz); + return res; +} + +#ifdef __LP64__ + +// void *operator new(size_t) +TSAN_INTERCEPTOR(void*, _Znwm, uptr sz) { + void *p = 0; + { + SCOPED_TSAN_INTERCEPTOR(_Znwm, sz); + p = user_alloc(thr, pc, sz); + } + invoke_malloc_hook(p, sz); + return p; +} + +// void *operator new(size_t, nothrow_t) +TSAN_INTERCEPTOR(void*, _ZnwmRKSt9nothrow_t, uptr sz) { + void *p = 0; + { + SCOPED_TSAN_INTERCEPTOR(_ZnwmRKSt9nothrow_t, sz); + p = user_alloc(thr, pc, sz); + } + invoke_malloc_hook(p, sz); + return p; +} + +// void *operator new[](size_t) +TSAN_INTERCEPTOR(void*, _Znam, uptr sz) { + void *p = 0; + { + SCOPED_TSAN_INTERCEPTOR(_Znam, sz); + p = user_alloc(thr, pc, sz); + } + invoke_malloc_hook(p, sz); + return p; +} + +// void *operator new[](size_t, nothrow_t) +TSAN_INTERCEPTOR(void*, _ZnamRKSt9nothrow_t, uptr sz) { + void *p = 0; + { + SCOPED_TSAN_INTERCEPTOR(_ZnamRKSt9nothrow_t, sz); + p = user_alloc(thr, pc, sz); + } + invoke_malloc_hook(p, sz); + return p; +} + +#else +#error "Not implemented" +#endif + +// void operator delete(void*) +TSAN_INTERCEPTOR(void, _ZdlPv, void *p) { + if (p == 0) + return; + invoke_free_hook(p); + SCOPED_TSAN_INTERCEPTOR(_ZdlPv, p); + user_free(thr, pc, p); +} + +// void operator delete(void*, nothrow_t) +TSAN_INTERCEPTOR(void, _ZdlPvRKSt9nothrow_t, void *p) { + if (p == 0) + return; + invoke_free_hook(p); + SCOPED_TSAN_INTERCEPTOR(_ZdlPvRKSt9nothrow_t, p); + user_free(thr, pc, p); +} + +// void operator delete[](void*) +TSAN_INTERCEPTOR(void, _ZdaPv, void *p) { + if (p == 0) + return; + invoke_free_hook(p); + SCOPED_TSAN_INTERCEPTOR(_ZdaPv, p); + user_free(thr, pc, p); +} + +// void operator delete[](void*, nothrow_t) +TSAN_INTERCEPTOR(void, _ZdaPvRKSt9nothrow_t, void *p) { + if (p == 0) + return; + invoke_free_hook(p); + SCOPED_TSAN_INTERCEPTOR(_ZdaPvRKSt9nothrow_t, p); + user_free(thr, pc, p); +} + +TSAN_INTERCEPTOR(void*, memalign, uptr align, uptr sz) { + SCOPED_TSAN_INTERCEPTOR(memalign, align, sz); + return user_alloc_aligned(thr, pc, sz, align); +} + +TSAN_INTERCEPTOR(void*, valloc, uptr sz) { + SCOPED_TSAN_INTERCEPTOR(valloc, sz); + return user_alloc_aligned(thr, pc, sz, kPageSize); +} + +TSAN_INTERCEPTOR(void*, pvalloc, uptr sz) { + SCOPED_TSAN_INTERCEPTOR(pvalloc, sz); + sz = RoundUp(sz, kPageSize); + return user_alloc_aligned(thr, pc, sz, kPageSize); +} + +TSAN_INTERCEPTOR(int, posix_memalign, void **memptr, uptr align, uptr sz) { + SCOPED_TSAN_INTERCEPTOR(posix_memalign, memptr, align, sz); + *memptr = user_alloc_aligned(thr, pc, sz, align); + return 0; +} + +// Used in thread-safe function static initialization. +TSAN_INTERCEPTOR(int, __cxa_guard_acquire, char *m) { + SCOPED_TSAN_INTERCEPTOR(__cxa_guard_acquire, m); + int res = REAL(__cxa_guard_acquire)(m); + if (res) { + // This thread does the init. + } else { + Acquire(thr, pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(void, __cxa_guard_release, char *m) { + SCOPED_TSAN_INTERCEPTOR(__cxa_guard_release, m); + Release(thr, pc, (uptr)m); + REAL(__cxa_guard_release)(m); +} + +static void thread_finalize(void *v) { + uptr iter = (uptr)v; + if (iter > 1) { + if (pthread_setspecific(g_thread_finalize_key, (void*)(iter - 1))) { + TsanPrintf("ThreadSanitizer: failed to set thread key\n"); + Die(); + } + return; + } + { + ScopedInRtl in_rtl; + ThreadState *thr = cur_thread(); + ThreadFinish(thr); + SignalContext *sctx = thr->signal_ctx; + if (sctx) { + thr->signal_ctx = 0; + internal_free(sctx); + } + } +} + + +struct ThreadParam { + void* (*callback)(void *arg); + void *param; + atomic_uintptr_t tid; +}; + +extern "C" void *__tsan_thread_start_func(void *arg) { + ThreadParam *p = (ThreadParam*)arg; + void* (*callback)(void *arg) = p->callback; + void *param = p->param; + int tid = 0; + { + ThreadState *thr = cur_thread(); + ScopedInRtl in_rtl; + if (pthread_setspecific(g_thread_finalize_key, (void*)4)) { + TsanPrintf("ThreadSanitizer: failed to set thread key\n"); + Die(); + } + while ((tid = atomic_load(&p->tid, memory_order_acquire)) == 0) + pthread_yield(); + atomic_store(&p->tid, 0, memory_order_release); + ThreadStart(thr, tid); + CHECK_EQ(thr->in_rtl, 1); + } + void *res = callback(param); + // Prevent the callback from being tail called, + // it mixes up stack traces. + volatile int foo = 42; + foo++; + return res; +} + +TSAN_INTERCEPTOR(int, pthread_create, + void *th, void *attr, void *(*callback)(void*), void * param) { + SCOPED_TSAN_INTERCEPTOR(pthread_create, th, attr, callback, param); + pthread_attr_t myattr; + if (attr == 0) { + pthread_attr_init(&myattr); + attr = &myattr; + } + int detached = 0; + pthread_attr_getdetachstate(attr, &detached); + uptr stacksize = 0; + pthread_attr_getstacksize(attr, &stacksize); + // We place the huge ThreadState object into TLS, account for that. + const uptr minstacksize = GetTlsSize() + 128*1024; + if (stacksize < minstacksize) { + DPrintf("ThreadSanitizer: stacksize %zu->%zu\n", stacksize, minstacksize); + pthread_attr_setstacksize(attr, minstacksize); + } + ThreadParam p; + p.callback = callback; + p.param = param; + atomic_store(&p.tid, 0, memory_order_relaxed); + int res = REAL(pthread_create)(th, attr, __tsan_thread_start_func, &p); + if (res == 0) { + int tid = ThreadCreate(cur_thread(), pc, *(uptr*)th, detached); + CHECK_NE(tid, 0); + atomic_store(&p.tid, tid, memory_order_release); + while (atomic_load(&p.tid, memory_order_acquire) != 0) + pthread_yield(); + } + if (attr == &myattr) + pthread_attr_destroy(&myattr); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_join, void *th, void **ret) { + SCOPED_TSAN_INTERCEPTOR(pthread_join, th, ret); + int tid = ThreadTid(thr, pc, (uptr)th); + int res = REAL(pthread_join)(th, ret); + if (res == 0) { + ThreadJoin(cur_thread(), pc, tid); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_detach, void *th) { + SCOPED_TSAN_INTERCEPTOR(pthread_detach, th); + int tid = ThreadTid(thr, pc, (uptr)th); + int res = REAL(pthread_detach)(th); + if (res == 0) { + ThreadDetach(cur_thread(), pc, tid); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_mutex_init, void *m, void *a) { + SCOPED_TSAN_INTERCEPTOR(pthread_mutex_init, m, a); + int res = REAL(pthread_mutex_init)(m, a); + if (res == 0) { + bool recursive = false; + if (a) { + int type = 0; + if (pthread_mutexattr_gettype(a, &type) == 0) + recursive = (type == PTHREAD_MUTEX_RECURSIVE + || type == PTHREAD_MUTEX_RECURSIVE_NP); + } + MutexCreate(cur_thread(), pc, (uptr)m, false, recursive); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_mutex_destroy, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_mutex_destroy, m); + int res = REAL(pthread_mutex_destroy)(m); + if (res == 0 || res == EBUSY) { + MutexDestroy(cur_thread(), pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_mutex_lock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_mutex_lock, m); + int res = REAL(pthread_mutex_lock)(m); + if (res == 0) { + MutexLock(cur_thread(), pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_mutex_trylock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_mutex_trylock, m); + int res = REAL(pthread_mutex_trylock)(m); + if (res == 0) { + MutexLock(cur_thread(), pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_mutex_timedlock, void *m, void *abstime) { + SCOPED_TSAN_INTERCEPTOR(pthread_mutex_timedlock, m, abstime); + int res = REAL(pthread_mutex_timedlock)(m, abstime); + if (res == 0) { + MutexLock(cur_thread(), pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_mutex_unlock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_mutex_unlock, m); + MutexUnlock(cur_thread(), pc, (uptr)m); + int res = REAL(pthread_mutex_unlock)(m); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_spin_init, void *m, int pshared) { + SCOPED_TSAN_INTERCEPTOR(pthread_spin_init, m, pshared); + int res = REAL(pthread_spin_init)(m, pshared); + if (res == 0) { + MutexCreate(cur_thread(), pc, (uptr)m, false, false); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_spin_destroy, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_spin_destroy, m); + int res = REAL(pthread_spin_destroy)(m); + if (res == 0) { + MutexDestroy(cur_thread(), pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_spin_lock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_spin_lock, m); + int res = REAL(pthread_spin_lock)(m); + if (res == 0) { + MutexLock(cur_thread(), pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_spin_trylock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_spin_trylock, m); + int res = REAL(pthread_spin_trylock)(m); + if (res == 0) { + MutexLock(cur_thread(), pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_spin_unlock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_spin_unlock, m); + MutexUnlock(cur_thread(), pc, (uptr)m); + int res = REAL(pthread_spin_unlock)(m); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_init, void *m, void *a) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_init, m, a); + int res = REAL(pthread_rwlock_init)(m, a); + if (res == 0) { + MutexCreate(cur_thread(), pc, (uptr)m, true, false); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_destroy, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_destroy, m); + int res = REAL(pthread_rwlock_destroy)(m); + if (res == 0) { + MutexDestroy(cur_thread(), pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_rdlock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_rdlock, m); + int res = REAL(pthread_rwlock_rdlock)(m); + if (res == 0) { + MutexReadLock(cur_thread(), pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_tryrdlock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_tryrdlock, m); + int res = REAL(pthread_rwlock_tryrdlock)(m); + if (res == 0) { + MutexReadLock(cur_thread(), pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_timedrdlock, void *m, void *abstime) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_timedrdlock, m, abstime); + int res = REAL(pthread_rwlock_timedrdlock)(m, abstime); + if (res == 0) { + MutexReadLock(cur_thread(), pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_wrlock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_wrlock, m); + int res = REAL(pthread_rwlock_wrlock)(m); + if (res == 0) { + MutexLock(cur_thread(), pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_trywrlock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_trywrlock, m); + int res = REAL(pthread_rwlock_trywrlock)(m); + if (res == 0) { + MutexLock(cur_thread(), pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_timedwrlock, void *m, void *abstime) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_timedwrlock, m, abstime); + int res = REAL(pthread_rwlock_timedwrlock)(m, abstime); + if (res == 0) { + MutexLock(cur_thread(), pc, (uptr)m); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_rwlock_unlock, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_unlock, m); + MutexReadOrWriteUnlock(cur_thread(), pc, (uptr)m); + int res = REAL(pthread_rwlock_unlock)(m); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_cond_init, void *c, void *a) { + SCOPED_TSAN_INTERCEPTOR(pthread_cond_init, c, a); + int res = REAL(pthread_cond_init)(c, a); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_cond_destroy, void *c) { + SCOPED_TSAN_INTERCEPTOR(pthread_cond_destroy, c); + int res = REAL(pthread_cond_destroy)(c); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_cond_signal, void *c) { + SCOPED_TSAN_INTERCEPTOR(pthread_cond_signal, c); + int res = REAL(pthread_cond_signal)(c); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_cond_broadcast, void *c) { + SCOPED_TSAN_INTERCEPTOR(pthread_cond_broadcast, c); + int res = REAL(pthread_cond_broadcast)(c); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_cond_wait, void *c, void *m) { + SCOPED_TSAN_INTERCEPTOR(pthread_cond_wait, c, m); + MutexUnlock(cur_thread(), pc, (uptr)m); + int res = REAL(pthread_cond_wait)(c, m); + MutexLock(cur_thread(), pc, (uptr)m); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_cond_timedwait, void *c, void *m, void *abstime) { + SCOPED_TSAN_INTERCEPTOR(pthread_cond_timedwait, c, m, abstime); + MutexUnlock(cur_thread(), pc, (uptr)m); + int res = REAL(pthread_cond_timedwait)(c, m, abstime); + MutexLock(cur_thread(), pc, (uptr)m); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_barrier_init, void *b, void *a, unsigned count) { + SCOPED_TSAN_INTERCEPTOR(pthread_barrier_init, b, a, count); + MemoryWrite1Byte(thr, pc, (uptr)b); + int res = REAL(pthread_barrier_init)(b, a, count); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_barrier_destroy, void *b) { + SCOPED_TSAN_INTERCEPTOR(pthread_barrier_destroy, b); + MemoryWrite1Byte(thr, pc, (uptr)b); + int res = REAL(pthread_barrier_destroy)(b); + return res; +} + +TSAN_INTERCEPTOR(int, pthread_barrier_wait, void *b) { + SCOPED_TSAN_INTERCEPTOR(pthread_barrier_wait, b); + Release(cur_thread(), pc, (uptr)b); + MemoryRead1Byte(thr, pc, (uptr)b); + int res = REAL(pthread_barrier_wait)(b); + MemoryRead1Byte(thr, pc, (uptr)b); + if (res == 0 || res == PTHREAD_BARRIER_SERIAL_THREAD) { + Acquire(cur_thread(), pc, (uptr)b); + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_once, void *o, void (*f)()) { + SCOPED_TSAN_INTERCEPTOR(pthread_once, o, f); + if (o == 0 || f == 0) + return EINVAL; + atomic_uint32_t *a = static_cast<atomic_uint32_t*>(o); + u32 v = atomic_load(a, memory_order_acquire); + if (v == 0 && atomic_compare_exchange_strong(a, &v, 1, + memory_order_relaxed)) { + const int old_in_rtl = thr->in_rtl; + thr->in_rtl = 0; + (*f)(); + CHECK_EQ(thr->in_rtl, 0); + thr->in_rtl = old_in_rtl; + Release(cur_thread(), pc, (uptr)o); + atomic_store(a, 2, memory_order_release); + } else { + while (v != 2) { + pthread_yield(); + v = atomic_load(a, memory_order_acquire); + } + Acquire(cur_thread(), pc, (uptr)o); + } + return 0; +} + +TSAN_INTERCEPTOR(int, sem_init, void *s, int pshared, unsigned value) { + SCOPED_TSAN_INTERCEPTOR(sem_init, s, pshared, value); + int res = REAL(sem_init)(s, pshared, value); + return res; +} + +TSAN_INTERCEPTOR(int, sem_destroy, void *s) { + SCOPED_TSAN_INTERCEPTOR(sem_destroy, s); + int res = REAL(sem_destroy)(s); + return res; +} + +TSAN_INTERCEPTOR(int, sem_wait, void *s) { + SCOPED_TSAN_INTERCEPTOR(sem_wait, s); + int res = REAL(sem_wait)(s); + if (res == 0) { + Acquire(cur_thread(), pc, (uptr)s); + } + return res; +} + +TSAN_INTERCEPTOR(int, sem_trywait, void *s) { + SCOPED_TSAN_INTERCEPTOR(sem_trywait, s); + int res = REAL(sem_trywait)(s); + if (res == 0) { + Acquire(cur_thread(), pc, (uptr)s); + } + return res; +} + +TSAN_INTERCEPTOR(int, sem_timedwait, void *s, void *abstime) { + SCOPED_TSAN_INTERCEPTOR(sem_timedwait, s, abstime); + int res = REAL(sem_timedwait)(s, abstime); + if (res == 0) { + Acquire(cur_thread(), pc, (uptr)s); + } + return res; +} + +TSAN_INTERCEPTOR(int, sem_post, void *s) { + SCOPED_TSAN_INTERCEPTOR(sem_post, s); + Release(cur_thread(), pc, (uptr)s); + int res = REAL(sem_post)(s); + return res; +} + +TSAN_INTERCEPTOR(int, sem_getvalue, void *s, int *sval) { + SCOPED_TSAN_INTERCEPTOR(sem_getvalue, s, sval); + int res = REAL(sem_getvalue)(s, sval); + if (res == 0) { + Acquire(cur_thread(), pc, (uptr)s); + } + return res; +} + +TSAN_INTERCEPTOR(long_t, read, int fd, void *buf, long_t sz) { + SCOPED_TSAN_INTERCEPTOR(read, fd, buf, sz); + int res = REAL(read)(fd, buf, sz); + if (res >= 0) { + Acquire(cur_thread(), pc, fd2addr(fd)); + } + return res; +} + +TSAN_INTERCEPTOR(long_t, pread, int fd, void *buf, long_t sz, unsigned off) { + SCOPED_TSAN_INTERCEPTOR(pread, fd, buf, sz, off); + int res = REAL(pread)(fd, buf, sz, off); + if (res >= 0) { + Acquire(cur_thread(), pc, fd2addr(fd)); + } + return res; +} + +TSAN_INTERCEPTOR(long_t, pread64, int fd, void *buf, long_t sz, u64 off) { + SCOPED_TSAN_INTERCEPTOR(pread64, fd, buf, sz, off); + int res = REAL(pread64)(fd, buf, sz, off); + if (res >= 0) { + Acquire(cur_thread(), pc, fd2addr(fd)); + } + return res; +} + +TSAN_INTERCEPTOR(long_t, readv, int fd, void *vec, int cnt) { + SCOPED_TSAN_INTERCEPTOR(readv, fd, vec, cnt); + int res = REAL(readv)(fd, vec, cnt); + if (res >= 0) { + Acquire(cur_thread(), pc, fd2addr(fd)); + } + return res; +} + +TSAN_INTERCEPTOR(long_t, preadv64, int fd, void *vec, int cnt, u64 off) { + SCOPED_TSAN_INTERCEPTOR(preadv64, fd, vec, cnt, off); + int res = REAL(preadv64)(fd, vec, cnt, off); + if (res >= 0) { + Acquire(cur_thread(), pc, fd2addr(fd)); + } + return res; +} + +TSAN_INTERCEPTOR(long_t, write, int fd, void *buf, long_t sz) { + SCOPED_TSAN_INTERCEPTOR(write, fd, buf, sz); + Release(cur_thread(), pc, fd2addr(fd)); + int res = REAL(write)(fd, buf, sz); + return res; +} + +TSAN_INTERCEPTOR(long_t, pwrite, int fd, void *buf, long_t sz, unsigned off) { + SCOPED_TSAN_INTERCEPTOR(pwrite, fd, buf, sz, off); + Release(cur_thread(), pc, fd2addr(fd)); + int res = REAL(pwrite)(fd, buf, sz, off); + return res; +} + +TSAN_INTERCEPTOR(long_t, pwrite64, int fd, void *buf, long_t sz, unsigned off) { + SCOPED_TSAN_INTERCEPTOR(pwrite64, fd, buf, sz, off); + Release(cur_thread(), pc, fd2addr(fd)); + int res = REAL(pwrite64)(fd, buf, sz, off); + return res; +} + +TSAN_INTERCEPTOR(long_t, writev, int fd, void *vec, int cnt) { + SCOPED_TSAN_INTERCEPTOR(writev, fd, vec, cnt); + Release(cur_thread(), pc, fd2addr(fd)); + int res = REAL(writev)(fd, vec, cnt); + return res; +} + +TSAN_INTERCEPTOR(long_t, pwritev64, int fd, void *vec, int cnt, u64 off) { + SCOPED_TSAN_INTERCEPTOR(pwritev64, fd, vec, cnt, off); + Release(cur_thread(), pc, fd2addr(fd)); + int res = REAL(pwritev64)(fd, vec, cnt, off); + return res; +} + +TSAN_INTERCEPTOR(long_t, send, int fd, void *buf, long_t len, int flags) { + SCOPED_TSAN_INTERCEPTOR(send, fd, buf, len, flags); + Release(cur_thread(), pc, fd2addr(fd)); + int res = REAL(send)(fd, buf, len, flags); + return res; +} + +TSAN_INTERCEPTOR(long_t, sendmsg, int fd, void *msg, int flags) { + SCOPED_TSAN_INTERCEPTOR(sendmsg, fd, msg, flags); + Release(cur_thread(), pc, fd2addr(fd)); + int res = REAL(sendmsg)(fd, msg, flags); + return res; +} + +TSAN_INTERCEPTOR(long_t, recv, int fd, void *buf, long_t len, int flags) { + SCOPED_TSAN_INTERCEPTOR(recv, fd, buf, len, flags); + int res = REAL(recv)(fd, buf, len, flags); + if (res >= 0) { + Acquire(cur_thread(), pc, fd2addr(fd)); + } + return res; +} + +TSAN_INTERCEPTOR(long_t, recvmsg, int fd, void *msg, int flags) { + SCOPED_TSAN_INTERCEPTOR(recvmsg, fd, msg, flags); + int res = REAL(recvmsg)(fd, msg, flags); + if (res >= 0) { + Acquire(cur_thread(), pc, fd2addr(fd)); + } + return res; +} + +TSAN_INTERCEPTOR(int, unlink, char *path) { + SCOPED_TSAN_INTERCEPTOR(unlink, path); + Release(cur_thread(), pc, file2addr(path)); + int res = REAL(unlink)(path); + return res; +} + +TSAN_INTERCEPTOR(void*, fopen, char *path, char *mode) { + SCOPED_TSAN_INTERCEPTOR(fopen, path, mode); + void *res = REAL(fopen)(path, mode); + Acquire(cur_thread(), pc, file2addr(path)); + return res; +} + +TSAN_INTERCEPTOR(uptr, fread, void *ptr, uptr size, uptr nmemb, void *f) { + SCOPED_TSAN_INTERCEPTOR(fread, ptr, size, nmemb, f); + MemoryAccessRange(thr, pc, (uptr)ptr, size * nmemb, true); + return REAL(fread)(ptr, size, nmemb, f); +} + +TSAN_INTERCEPTOR(uptr, fwrite, const void *p, uptr size, uptr nmemb, void *f) { + SCOPED_TSAN_INTERCEPTOR(fwrite, p, size, nmemb, f); + MemoryAccessRange(thr, pc, (uptr)p, size * nmemb, false); + return REAL(fwrite)(p, size, nmemb, f); +} + +TSAN_INTERCEPTOR(int, puts, const char *s) { + SCOPED_TSAN_INTERCEPTOR(puts, s); + MemoryAccessRange(thr, pc, (uptr)s, internal_strlen(s), false); + return REAL(puts)(s); +} + +TSAN_INTERCEPTOR(int, rmdir, char *path) { + SCOPED_TSAN_INTERCEPTOR(rmdir, path); + Release(cur_thread(), pc, dir2addr(path)); + int res = REAL(rmdir)(path); + return res; +} + +TSAN_INTERCEPTOR(void*, opendir, char *path) { + SCOPED_TSAN_INTERCEPTOR(opendir, path); + void *res = REAL(opendir)(path); + Acquire(cur_thread(), pc, dir2addr(path)); + return res; +} + +TSAN_INTERCEPTOR(int, epoll_ctl, int epfd, int op, int fd, void *ev) { + SCOPED_TSAN_INTERCEPTOR(epoll_ctl, epfd, op, fd, ev); + if (op == EPOLL_CTL_ADD) { + Release(cur_thread(), pc, epollfd2addr(epfd)); + } + int res = REAL(epoll_ctl)(epfd, op, fd, ev); + return res; +} + +TSAN_INTERCEPTOR(int, epoll_wait, int epfd, void *ev, int cnt, int timeout) { + SCOPED_TSAN_INTERCEPTOR(epoll_wait, epfd, ev, cnt, timeout); + int res = REAL(epoll_wait)(epfd, ev, cnt, timeout); + if (res > 0) { + Acquire(cur_thread(), pc, epollfd2addr(epfd)); + } + return res; +} + +static void ALWAYS_INLINE rtl_generic_sighandler(bool sigact, int sig, + my_siginfo_t *info, void *ctx) { + ThreadState *thr = cur_thread(); + SignalContext *sctx = SigCtx(thr); + // Don't mess with synchronous signals. + if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL || + sig == SIGABRT || sig == SIGFPE || sig == SIGPIPE || + (sctx && sig == sctx->int_signal_send)) { + CHECK(thr->in_rtl == 0 || thr->in_rtl == 1); + int in_rtl = thr->in_rtl; + thr->in_rtl = 0; + CHECK_EQ(thr->in_signal_handler, false); + thr->in_signal_handler = true; + if (sigact) + sigactions[sig].sa_sigaction(sig, info, ctx); + else + sigactions[sig].sa_handler(sig); + CHECK_EQ(thr->in_signal_handler, true); + thr->in_signal_handler = false; + thr->in_rtl = in_rtl; + return; + } + + if (sctx == 0) + return; + SignalDesc *signal = &sctx->pending_signals[sig]; + if (signal->armed == false) { + signal->armed = true; + signal->sigaction = sigact; + if (info) + internal_memcpy(&signal->siginfo, info, sizeof(*info)); + if (ctx) + internal_memcpy(&signal->ctx, ctx, sizeof(signal->ctx)); + sctx->pending_signal_count++; + } +} + +static void rtl_sighandler(int sig) { + rtl_generic_sighandler(false, sig, 0, 0); +} + +static void rtl_sigaction(int sig, my_siginfo_t *info, void *ctx) { + rtl_generic_sighandler(true, sig, info, ctx); +} + +TSAN_INTERCEPTOR(int, sigaction, int sig, sigaction_t *act, sigaction_t *old) { + SCOPED_TSAN_INTERCEPTOR(sigaction, sig, act, old); + if (old) + internal_memcpy(old, &sigactions[sig], sizeof(*old)); + if (act == 0) + return 0; + internal_memcpy(&sigactions[sig], act, sizeof(*act)); + sigaction_t newact; + internal_memcpy(&newact, act, sizeof(newact)); + sigfillset(&newact.sa_mask); + if (act->sa_handler != SIG_IGN && act->sa_handler != SIG_DFL) { + if (newact.sa_flags & SA_SIGINFO) + newact.sa_sigaction = rtl_sigaction; + else + newact.sa_handler = rtl_sighandler; + } + int res = REAL(sigaction)(sig, &newact, 0); + return res; +} + +TSAN_INTERCEPTOR(sighandler_t, signal, int sig, sighandler_t h) { + sigaction_t act = {}; + act.sa_handler = h; + REAL(memset)(&act.sa_mask, -1, sizeof(act.sa_mask)); + act.sa_flags = 0; + sigaction_t old = {}; + int res = sigaction(sig, &act, &old); + if (res) + return SIG_ERR; + return old.sa_handler; +} + +TSAN_INTERCEPTOR(int, raise, int sig) { + SCOPED_TSAN_INTERCEPTOR(raise, sig); + SignalContext *sctx = SigCtx(thr); + CHECK_NE(sctx, 0); + int prev = sctx->int_signal_send; + sctx->int_signal_send = sig; + int res = REAL(raise)(sig); + CHECK_EQ(sctx->int_signal_send, sig); + sctx->int_signal_send = prev; + return res; +} + +TSAN_INTERCEPTOR(int, kill, int pid, int sig) { + SCOPED_TSAN_INTERCEPTOR(kill, pid, sig); + SignalContext *sctx = SigCtx(thr); + CHECK_NE(sctx, 0); + int prev = sctx->int_signal_send; + if (pid == GetPid()) { + sctx->int_signal_send = sig; + } + int res = REAL(kill)(pid, sig); + if (pid == GetPid()) { + CHECK_EQ(sctx->int_signal_send, sig); + sctx->int_signal_send = prev; + } + return res; +} + +TSAN_INTERCEPTOR(int, pthread_kill, void *tid, int sig) { + SCOPED_TSAN_INTERCEPTOR(pthread_kill, tid, sig); + SignalContext *sctx = SigCtx(thr); + CHECK_NE(sctx, 0); + int prev = sctx->int_signal_send; + if (tid == pthread_self()) { + sctx->int_signal_send = sig; + } + int res = REAL(pthread_kill)(tid, sig); + if (tid == pthread_self()) { + CHECK_EQ(sctx->int_signal_send, sig); + sctx->int_signal_send = prev; + } + return res; +} + +static void process_pending_signals(ThreadState *thr) { + CHECK_EQ(thr->in_rtl, 0); + SignalContext *sctx = SigCtx(thr); + if (sctx == 0 || sctx->pending_signal_count == 0 || thr->in_signal_handler) + return; + thr->in_signal_handler = true; + sctx->pending_signal_count = 0; + // These are too big for stack. + static THREADLOCAL sigset_t emptyset, oldset; + sigfillset(&emptyset); + pthread_sigmask(SIG_SETMASK, &emptyset, &oldset); + for (int sig = 0; sig < kSigCount; sig++) { + SignalDesc *signal = &sctx->pending_signals[sig]; + if (signal->armed) { + signal->armed = false; + if (sigactions[sig].sa_handler != SIG_DFL + && sigactions[sig].sa_handler != SIG_IGN) { + // Insure that the handler does not spoil errno. + const int saved_errno = errno; + errno = 0; + if (signal->sigaction) + sigactions[sig].sa_sigaction(sig, &signal->siginfo, &signal->ctx); + else + sigactions[sig].sa_handler(sig); + if (errno != 0) { + ScopedInRtl in_rtl; + StackTrace stack; + uptr pc = signal->sigaction ? + (uptr)sigactions[sig].sa_sigaction : + (uptr)sigactions[sig].sa_handler; + stack.Init(&pc, 1); + ScopedReport rep(ReportTypeErrnoInSignal); + rep.AddStack(&stack); + OutputReport(rep, rep.GetReport()->stacks[0]); + } + errno = saved_errno; + } + } + } + pthread_sigmask(SIG_SETMASK, &oldset, 0); + CHECK_EQ(thr->in_signal_handler, true); + thr->in_signal_handler = false; +} + +namespace __tsan { + +void InitializeInterceptors() { + CHECK_GT(cur_thread()->in_rtl, 0); + + // We need to setup it early, because functions like dlsym() can call it. + REAL(memset) = internal_memset; + REAL(memcpy) = internal_memcpy; + REAL(memcmp) = internal_memcmp; + + TSAN_INTERCEPT(longjmp); + TSAN_INTERCEPT(siglongjmp); + + TSAN_INTERCEPT(malloc); + TSAN_INTERCEPT(calloc); + TSAN_INTERCEPT(realloc); + TSAN_INTERCEPT(free); + TSAN_INTERCEPT(cfree); + TSAN_INTERCEPT(mmap); + TSAN_INTERCEPT(mmap64); + TSAN_INTERCEPT(munmap); + TSAN_INTERCEPT(memalign); + TSAN_INTERCEPT(valloc); + TSAN_INTERCEPT(pvalloc); + TSAN_INTERCEPT(posix_memalign); + + TSAN_INTERCEPT(_Znwm); + TSAN_INTERCEPT(_ZnwmRKSt9nothrow_t); + TSAN_INTERCEPT(_Znam); + TSAN_INTERCEPT(_ZnamRKSt9nothrow_t); + TSAN_INTERCEPT(_ZdlPv); + TSAN_INTERCEPT(_ZdlPvRKSt9nothrow_t); + TSAN_INTERCEPT(_ZdaPv); + TSAN_INTERCEPT(_ZdaPvRKSt9nothrow_t); + + TSAN_INTERCEPT(strlen); + TSAN_INTERCEPT(memset); + TSAN_INTERCEPT(memcpy); + TSAN_INTERCEPT(strcmp); + TSAN_INTERCEPT(memchr); + TSAN_INTERCEPT(memrchr); + TSAN_INTERCEPT(memmove); + TSAN_INTERCEPT(memcmp); + TSAN_INTERCEPT(strchr); + TSAN_INTERCEPT(strchrnul); + TSAN_INTERCEPT(strrchr); + TSAN_INTERCEPT(strncmp); + TSAN_INTERCEPT(strcpy); // NOLINT + TSAN_INTERCEPT(strncpy); + TSAN_INTERCEPT(strstr); + + TSAN_INTERCEPT(__cxa_guard_acquire); + TSAN_INTERCEPT(__cxa_guard_release); + + TSAN_INTERCEPT(pthread_create); + TSAN_INTERCEPT(pthread_join); + TSAN_INTERCEPT(pthread_detach); + + TSAN_INTERCEPT(pthread_mutex_init); + TSAN_INTERCEPT(pthread_mutex_destroy); + TSAN_INTERCEPT(pthread_mutex_lock); + TSAN_INTERCEPT(pthread_mutex_trylock); + TSAN_INTERCEPT(pthread_mutex_timedlock); + TSAN_INTERCEPT(pthread_mutex_unlock); + + TSAN_INTERCEPT(pthread_spin_init); + TSAN_INTERCEPT(pthread_spin_destroy); + TSAN_INTERCEPT(pthread_spin_lock); + TSAN_INTERCEPT(pthread_spin_trylock); + TSAN_INTERCEPT(pthread_spin_unlock); + + TSAN_INTERCEPT(pthread_rwlock_init); + TSAN_INTERCEPT(pthread_rwlock_destroy); + TSAN_INTERCEPT(pthread_rwlock_rdlock); + TSAN_INTERCEPT(pthread_rwlock_tryrdlock); + TSAN_INTERCEPT(pthread_rwlock_timedrdlock); + TSAN_INTERCEPT(pthread_rwlock_wrlock); + TSAN_INTERCEPT(pthread_rwlock_trywrlock); + TSAN_INTERCEPT(pthread_rwlock_timedwrlock); + TSAN_INTERCEPT(pthread_rwlock_unlock); + + TSAN_INTERCEPT(pthread_cond_init); + TSAN_INTERCEPT(pthread_cond_destroy); + TSAN_INTERCEPT(pthread_cond_signal); + TSAN_INTERCEPT(pthread_cond_broadcast); + TSAN_INTERCEPT(pthread_cond_wait); + TSAN_INTERCEPT(pthread_cond_timedwait); + + TSAN_INTERCEPT(pthread_barrier_init); + TSAN_INTERCEPT(pthread_barrier_destroy); + TSAN_INTERCEPT(pthread_barrier_wait); + + TSAN_INTERCEPT(pthread_once); + + TSAN_INTERCEPT(sem_init); + TSAN_INTERCEPT(sem_destroy); + TSAN_INTERCEPT(sem_wait); + TSAN_INTERCEPT(sem_trywait); + TSAN_INTERCEPT(sem_timedwait); + TSAN_INTERCEPT(sem_post); + TSAN_INTERCEPT(sem_getvalue); + + TSAN_INTERCEPT(read); + TSAN_INTERCEPT(pread); + TSAN_INTERCEPT(pread64); + TSAN_INTERCEPT(readv); + TSAN_INTERCEPT(preadv64); + TSAN_INTERCEPT(write); + TSAN_INTERCEPT(pwrite); + TSAN_INTERCEPT(pwrite64); + TSAN_INTERCEPT(writev); + TSAN_INTERCEPT(pwritev64); + TSAN_INTERCEPT(send); + TSAN_INTERCEPT(sendmsg); + TSAN_INTERCEPT(recv); + TSAN_INTERCEPT(recvmsg); + + TSAN_INTERCEPT(unlink); + TSAN_INTERCEPT(fopen); + TSAN_INTERCEPT(fread); + TSAN_INTERCEPT(fwrite); + TSAN_INTERCEPT(puts); + TSAN_INTERCEPT(rmdir); + TSAN_INTERCEPT(opendir); + + TSAN_INTERCEPT(epoll_ctl); + TSAN_INTERCEPT(epoll_wait); + + TSAN_INTERCEPT(sigaction); + TSAN_INTERCEPT(signal); + TSAN_INTERCEPT(raise); + TSAN_INTERCEPT(kill); + TSAN_INTERCEPT(pthread_kill); + + atexit_ctx = new(internal_alloc(MBlockAtExit, sizeof(AtExitContext))) + AtExitContext(); + + if (__cxa_atexit(&finalize, 0, 0)) { + TsanPrintf("ThreadSanitizer: failed to setup atexit callback\n"); + Die(); + } + + if (pthread_key_create(&g_thread_finalize_key, &thread_finalize)) { + TsanPrintf("ThreadSanitizer: failed to create thread key\n"); + Die(); + } +} + +void internal_start_thread(void(*func)(void *arg), void *arg) { + void *th; + REAL(pthread_create)(&th, 0, (void*(*)(void *arg))func, arg); + REAL(pthread_detach)(th); +} + +} // namespace __tsan |
