[llvm-commits] [compiler-rt] r159278 - /compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc
Dmitry Vyukov
dvyukov at google.com
Wed Jun 27 11:50:41 PDT 2012
It was always there:
http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc?view=log&pathrev=158542
On Wed, Jun 27, 2012 at 10:19 PM, Chandler Carruth <chandlerc at google.com>wrote:
> On Wed, Jun 27, 2012 at 10:35 AM, Dmitry Vyukov <dvyukov at google.com>wrote:
>
>> Author: dvyukov
>> Date: Wed Jun 27 12:35:35 2012
>> New Revision: 159278
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=159278&view=rev
>> Log:
>> tsan: remember and pass original ucontext to signal handlers (instead of
>> a fabricated one)
>>
>
> This comment doesn't match the commit really -- the commit adds a
> completely new file. Was this file just missing from the repo previously?
>
>
>>
>> Added:
>> compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc
>>
>> Added: compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc
>> URL:
>> http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc?rev=159278&view=auto
>>
>> ==============================================================================
>> --- compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc (added)
>> +++ compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc Wed Jun 27
>> 12:35:35 2012
>> @@ -0,0 +1,1587 @@
>> +//===-- 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_libc.h"
>> +#include "sanitizer_common/sanitizer_placement_new.h"
>> +#include "tsan_rtl.h"
>> +#include "tsan_interface.h"
>> +#include "tsan_atomic.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) {
>> + ScopedInRtl in_rtl;
>> + ctx = (SignalContext*)internal_alloc(
>> + MBlockSignal, 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 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);
>> + REAL(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 void *s) {
>> + SCOPED_TSAN_INTERCEPTOR(strlen, s);
>> + uptr len = REAL(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 REAL(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 REAL(memcpy)(dst, src, size);
>> +}
>> +
>> +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(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(void*, strchr, void *s, int c) {
>> + SCOPED_TSAN_INTERCEPTOR(strchr, s, c);
>> + void *res = REAL(strchr)(s, c);
>> + uptr len = res ? (char*)res - (char*)s + 1 : REAL(strlen)(s) + 1;
>> + MemoryAccessRange(thr, pc, (uptr)s, len, false);
>> + return res;
>> +}
>> +
>> +TSAN_INTERCEPTOR(void*, strchrnul, void *s, int c) {
>> + SCOPED_TSAN_INTERCEPTOR(strchrnul, s, c);
>> + void *res = REAL(strchrnul)(s, c);
>> + uptr len = (char*)res - (char*)s + 1;
>> + MemoryAccessRange(thr, pc, (uptr)s, len, false);
>> + return res;
>> +}
>> +
>> +TSAN_INTERCEPTOR(void*, strrchr, void *s, int c) {
>> + SCOPED_TSAN_INTERCEPTOR(strrchr, s, c);
>> + MemoryAccessRange(thr, pc, (uptr)s, REAL(strlen)(s) + 1, false);
>> + return REAL(strrchr)(s, c);
>> +}
>> +
>> +TSAN_INTERCEPTOR(void*, strcpy, void *dst, const void *src) { // NOLINT
>> + SCOPED_TSAN_INTERCEPTOR(strcpy, dst, src); // NOLINT
>> + uptr srclen = REAL(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(void*, strncpy, void *dst, void *src, uptr n) {
>> + SCOPED_TSAN_INTERCEPTOR(strncpy, dst, src, n);
>> + uptr srclen = REAL(strlen)(src);
>> + 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 = REAL(strlen)(s1);
>> + uptr len2 = REAL(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();
>> + SignalContext *sctx = thr->signal_ctx;
>> + ThreadFinish(thr);
>> + if (sctx)
>> + 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, REAL(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 || 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;
>> + }
>> +
>> + SignalDesc *signal = &sctx->pending_signals[sig];
>> + if (signal->armed == false) {
>> + signal->armed = true;
>> + signal->sigaction = sigact;
>> + if (info)
>> + signal->siginfo = *info;
>> + if (ctx)
>> + signal->ctx = *(ucontext_t*)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)
>> + *old = sigactions[sig];
>> + if (act == 0)
>> + return 0;
>> + sigactions[sig] = *act;
>> + sigaction_t newact = *act;
>> + 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);
>> + 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);
>> + 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);
>> + 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->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 {
>> +
>> +// Used until we obtain real efficient functions.
>> +static void* poormans_memset(void *dst, int v, uptr size) {
>> + for (uptr i = 0; i < size; i++)
>> + ((char*)dst)[i] = (char)v;
>> + return dst;
>> +}
>> +
>> +static void* poormans_memcpy(void *dst, const void *src, uptr size) {
>> + for (uptr i = 0; i < size; i++)
>> + ((char*)dst)[i] = ((char*)src)[i];
>> + return dst;
>> +}
>> +
>> +void InitializeInterceptors() {
>> + CHECK_GT(cur_thread()->in_rtl, 0);
>> +
>> + // We need to setup it early, because functions like dlsym() can call
>> it.
>> + REAL(memset) = poormans_memset;
>> + REAL(memcpy) = poormans_memcpy;
>> +
>> + 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
>>
>>
>> _______________________________________________
>> llvm-commits mailing list
>> llvm-commits at cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
>>
>
>
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