[llvm-commits] [compiler-rt] r159278 - /compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc
Dmitry Vyukov
dvyukov at google.com
Wed Jun 27 10:35:35 PDT 2012
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)
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
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