1 //===-- tsan_interceptors.cc ----------------------------------------------===//
3 // This file is distributed under the University of Illinois Open Source
4 // License. See LICENSE.TXT for details.
6 //===----------------------------------------------------------------------===//
8 // This file is a part of ThreadSanitizer (TSan), a race detector.
10 // FIXME: move as many interceptors as possible into
11 // sanitizer_common/sanitizer_common_interceptors.inc
12 //===----------------------------------------------------------------------===//
14 #include "sanitizer_common/sanitizer_atomic.h"
15 #include "sanitizer_common/sanitizer_errno.h"
16 #include "sanitizer_common/sanitizer_libc.h"
17 #include "sanitizer_common/sanitizer_linux.h"
18 #include "sanitizer_common/sanitizer_platform_limits_netbsd.h"
19 #include "sanitizer_common/sanitizer_platform_limits_posix.h"
20 #include "sanitizer_common/sanitizer_placement_new.h"
21 #include "sanitizer_common/sanitizer_posix.h"
22 #include "sanitizer_common/sanitizer_stacktrace.h"
23 #include "sanitizer_common/sanitizer_tls_get_addr.h"
24 #include "interception/interception.h"
25 #include "tsan_interceptors.h"
26 #include "tsan_interface.h"
27 #include "tsan_platform.h"
28 #include "tsan_suppressions.h"
30 #include "tsan_mman.h"
34 using namespace __tsan
; // NOLINT
36 #if SANITIZER_FREEBSD || SANITIZER_MAC
37 #define stdout __stdoutp
38 #define stderr __stderrp
42 #define dirfd(dirp) (*(int *)(dirp))
43 #define fileno_unlocked fileno
51 #define stdout ((char*)&__sF + (__sF_size * 1))
52 #define stderr ((char*)&__sF + (__sF_size * 2))
61 const int kSigCount
= 129;
63 const int kSigCount
= 65;
68 u64 opaque
[768 / sizeof(u64
) + 1];
72 // The size is determined by looking at sizeof of real ucontext_t on linux.
73 u64 opaque
[936 / sizeof(u64
) + 1];
77 #if defined(__x86_64__) || defined(__mips__) || SANITIZER_PPC64V1
78 #define PTHREAD_ABI_BASE "GLIBC_2.3.2"
79 #elif defined(__aarch64__) || SANITIZER_PPC64V2
80 #define PTHREAD_ABI_BASE "GLIBC_2.17"
83 extern "C" int pthread_attr_init(void *attr
);
84 extern "C" int pthread_attr_destroy(void *attr
);
85 DECLARE_REAL(int, pthread_attr_getdetachstate
, void *, void *)
86 extern "C" int pthread_attr_setstacksize(void *attr
, uptr stacksize
);
87 extern "C" int pthread_key_create(unsigned *key
, void (*destructor
)(void* v
));
88 extern "C" int pthread_setspecific(unsigned key
, const void *v
);
89 DECLARE_REAL(int, pthread_mutexattr_gettype
, void *, void *)
90 DECLARE_REAL(int, fflush
, __sanitizer_FILE
*fp
)
91 DECLARE_REAL_AND_INTERCEPTOR(void *, malloc
, uptr size
)
92 DECLARE_REAL_AND_INTERCEPTOR(void, free
, void *ptr
)
93 extern "C" void *pthread_self();
94 extern "C" void _exit(int status
);
95 extern "C" int fileno_unlocked(void *stream
);
97 extern "C" int dirfd(void *dirp
);
99 #if !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_NETBSD
100 extern "C" int mallopt(int param
, int value
);
103 extern __sanitizer_FILE __sF
[];
105 extern __sanitizer_FILE
*stdout
, *stderr
;
107 #if !SANITIZER_FREEBSD && !SANITIZER_MAC && !SANITIZER_NETBSD
108 const int PTHREAD_MUTEX_RECURSIVE
= 1;
109 const int PTHREAD_MUTEX_RECURSIVE_NP
= 1;
111 const int PTHREAD_MUTEX_RECURSIVE
= 2;
112 const int PTHREAD_MUTEX_RECURSIVE_NP
= 2;
114 #if !SANITIZER_FREEBSD && !SANITIZER_MAC && !SANITIZER_NETBSD
115 const int EPOLL_CTL_ADD
= 1;
117 const int SIGILL
= 4;
118 const int SIGABRT
= 6;
119 const int SIGFPE
= 8;
120 const int SIGSEGV
= 11;
121 const int SIGPIPE
= 13;
122 const int SIGTERM
= 15;
123 #if defined(__mips__) || SANITIZER_FREEBSD || SANITIZER_MAC || SANITIZER_NETBSD
124 const int SIGBUS
= 10;
125 const int SIGSYS
= 12;
127 const int SIGBUS
= 7;
128 const int SIGSYS
= 31;
130 void *const MAP_FAILED
= (void*)-1;
132 const int PTHREAD_BARRIER_SERIAL_THREAD
= 1234567;
134 const int PTHREAD_BARRIER_SERIAL_THREAD
= -1;
136 const int MAP_FIXED
= 0x10;
137 typedef long long_t
; // NOLINT
139 // From /usr/include/unistd.h
140 # define F_ULOCK 0 /* Unlock a previously locked region. */
141 # define F_LOCK 1 /* Lock a region for exclusive use. */
142 # define F_TLOCK 2 /* Test and lock a region for exclusive use. */
143 # define F_TEST 3 /* Test a region for other processes locks. */
145 #if SANITIZER_FREEBSD || SANITIZER_MAC || SANITIZER_NETBSD
146 const int SA_SIGINFO
= 0x40;
147 const int SIG_SETMASK
= 3;
148 #elif defined(__mips__)
149 const int SA_SIGINFO
= 8;
150 const int SIG_SETMASK
= 3;
152 const int SA_SIGINFO
= 4;
153 const int SIG_SETMASK
= 2;
156 #define COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED \
157 (!cur_thread()->is_inited)
163 __sanitizer_siginfo siginfo
;
167 struct ThreadSignalContext
{
169 atomic_uintptr_t in_blocking_func
;
170 atomic_uintptr_t have_pending_signals
;
171 SignalDesc pending_signals
[kSigCount
];
172 // emptyset and oldset are too big for stack.
173 __sanitizer_sigset_t emptyset
;
174 __sanitizer_sigset_t oldset
;
177 // The sole reason tsan wraps atexit callbacks is to establish synchronization
178 // between callback setup and callback execution.
184 // InterceptorContext holds all global data required for interceptors.
185 // It's explicitly constructed in InitializeInterceptors with placement new
186 // and is never destroyed. This allows usage of members with non-trivial
187 // constructors and destructors.
188 struct InterceptorContext
{
189 // The object is 64-byte aligned, because we want hot data to be located
190 // in a single cache line if possible (it's accessed in every interceptor).
191 ALIGNED(64) LibIgnore libignore
;
192 __sanitizer_sigaction sigactions
[kSigCount
];
193 #if !SANITIZER_MAC && !SANITIZER_NETBSD
194 unsigned finalize_key
;
197 BlockingMutex atexit_mu
;
198 Vector
<struct AtExitCtx
*> AtExitStack
;
201 : libignore(LINKER_INITIALIZED
), AtExitStack() {
205 static ALIGNED(64) char interceptor_placeholder
[sizeof(InterceptorContext
)];
206 InterceptorContext
*interceptor_ctx() {
207 return reinterpret_cast<InterceptorContext
*>(&interceptor_placeholder
[0]);
210 LibIgnore
*libignore() {
211 return &interceptor_ctx()->libignore
;
214 void InitializeLibIgnore() {
215 const SuppressionContext
&supp
= *Suppressions();
216 const uptr n
= supp
.SuppressionCount();
217 for (uptr i
= 0; i
< n
; i
++) {
218 const Suppression
*s
= supp
.SuppressionAt(i
);
219 if (0 == internal_strcmp(s
->type
, kSuppressionLib
))
220 libignore()->AddIgnoredLibrary(s
->templ
);
222 if (flags()->ignore_noninstrumented_modules
)
223 libignore()->IgnoreNoninstrumentedModules(true);
224 libignore()->OnLibraryLoaded(0);
227 } // namespace __tsan
229 static ThreadSignalContext
*SigCtx(ThreadState
*thr
) {
230 ThreadSignalContext
*ctx
= (ThreadSignalContext
*)thr
->signal_ctx
;
231 if (ctx
== 0 && !thr
->is_dead
) {
232 ctx
= (ThreadSignalContext
*)MmapOrDie(sizeof(*ctx
), "ThreadSignalContext");
233 MemoryResetRange(thr
, (uptr
)&SigCtx
, (uptr
)ctx
, sizeof(*ctx
));
234 thr
->signal_ctx
= ctx
;
239 ScopedInterceptor::ScopedInterceptor(ThreadState
*thr
, const char *fname
,
241 : thr_(thr
), pc_(pc
), in_ignored_lib_(false), ignoring_(false) {
243 if (!thr_
->is_inited
) return;
244 if (!thr_
->ignore_interceptors
) FuncEntry(thr
, pc
);
245 DPrintf("#%d: intercept %s()\n", thr_
->tid
, fname
);
247 !thr_
->in_ignored_lib
&& (flags()->ignore_interceptors_accesses
||
248 libignore()->IsIgnored(pc
, &in_ignored_lib_
));
252 ScopedInterceptor::~ScopedInterceptor() {
253 if (!thr_
->is_inited
) return;
255 if (!thr_
->ignore_interceptors
) {
256 ProcessPendingSignals(thr_
);
262 void ScopedInterceptor::EnableIgnores() {
264 ThreadIgnoreBegin(thr_
, pc_
, /*save_stack=*/false);
265 if (flags()->ignore_noninstrumented_modules
) thr_
->suppress_reports
++;
266 if (in_ignored_lib_
) {
267 DCHECK(!thr_
->in_ignored_lib
);
268 thr_
->in_ignored_lib
= true;
273 void ScopedInterceptor::DisableIgnores() {
275 ThreadIgnoreEnd(thr_
, pc_
);
276 if (flags()->ignore_noninstrumented_modules
) thr_
->suppress_reports
--;
277 if (in_ignored_lib_
) {
278 DCHECK(thr_
->in_ignored_lib
);
279 thr_
->in_ignored_lib
= false;
284 #define TSAN_INTERCEPT(func) INTERCEPT_FUNCTION(func)
285 #if SANITIZER_FREEBSD
286 # define TSAN_INTERCEPT_VER(func, ver) INTERCEPT_FUNCTION(func)
287 # define TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(func)
288 # define TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS_THR(func)
289 #elif SANITIZER_NETBSD
290 # define TSAN_INTERCEPT_VER(func, ver) INTERCEPT_FUNCTION(func)
291 # define TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(func) \
292 INTERCEPT_FUNCTION(__libc_##func)
293 # define TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS_THR(func) \
294 INTERCEPT_FUNCTION(__libc_thr_##func)
296 # define TSAN_INTERCEPT_VER(func, ver) INTERCEPT_FUNCTION_VER(func, ver)
297 # define TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(func)
298 # define TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS_THR(func)
301 #define READ_STRING_OF_LEN(thr, pc, s, len, n) \
302 MemoryAccessRange((thr), (pc), (uptr)(s), \
303 common_flags()->strict_string_checks ? (len) + 1 : (n), false)
305 #define READ_STRING(thr, pc, s, n) \
306 READ_STRING_OF_LEN((thr), (pc), (s), internal_strlen(s), (n))
308 #define BLOCK_REAL(name) (BlockingCall(thr), REAL(name))
310 struct BlockingCall
{
311 explicit BlockingCall(ThreadState
*thr
)
315 atomic_store(&ctx
->in_blocking_func
, 1, memory_order_relaxed
);
316 if (atomic_load(&ctx
->have_pending_signals
, memory_order_relaxed
) == 0)
318 atomic_store(&ctx
->in_blocking_func
, 0, memory_order_relaxed
);
319 ProcessPendingSignals(thr
);
321 // When we are in a "blocking call", we process signals asynchronously
322 // (right when they arrive). In this context we do not expect to be
323 // executing any user/runtime code. The known interceptor sequence when
324 // this is not true is: pthread_join -> munmap(stack). It's fine
325 // to ignore munmap in this case -- we handle stack shadow separately.
326 thr
->ignore_interceptors
++;
330 thr
->ignore_interceptors
--;
331 atomic_store(&ctx
->in_blocking_func
, 0, memory_order_relaxed
);
335 ThreadSignalContext
*ctx
;
338 TSAN_INTERCEPTOR(unsigned, sleep
, unsigned sec
) {
339 SCOPED_TSAN_INTERCEPTOR(sleep
, sec
);
340 unsigned res
= BLOCK_REAL(sleep
)(sec
);
345 TSAN_INTERCEPTOR(int, usleep
, long_t usec
) {
346 SCOPED_TSAN_INTERCEPTOR(usleep
, usec
);
347 int res
= BLOCK_REAL(usleep
)(usec
);
352 TSAN_INTERCEPTOR(int, nanosleep
, void *req
, void *rem
) {
353 SCOPED_TSAN_INTERCEPTOR(nanosleep
, req
, rem
);
354 int res
= BLOCK_REAL(nanosleep
)(req
, rem
);
359 TSAN_INTERCEPTOR(int, pause
, int fake
) {
360 SCOPED_TSAN_INTERCEPTOR(pause
, fake
);
361 return BLOCK_REAL(pause
)(fake
);
364 static void at_exit_wrapper() {
367 // Ensure thread-safety.
368 BlockingMutexLock
l(&interceptor_ctx()->atexit_mu
);
370 // Pop AtExitCtx from the top of the stack of callback functions
371 uptr element
= interceptor_ctx()->AtExitStack
.Size() - 1;
372 ctx
= interceptor_ctx()->AtExitStack
[element
];
373 interceptor_ctx()->AtExitStack
.PopBack();
376 Acquire(cur_thread(), (uptr
)0, (uptr
)ctx
);
377 ((void(*)())ctx
->f
)();
381 static void cxa_at_exit_wrapper(void *arg
) {
382 Acquire(cur_thread(), 0, (uptr
)arg
);
383 AtExitCtx
*ctx
= (AtExitCtx
*)arg
;
384 ((void(*)(void *arg
))ctx
->f
)(ctx
->arg
);
388 static int setup_at_exit_wrapper(ThreadState
*thr
, uptr pc
, void(*f
)(),
389 void *arg
, void *dso
);
391 #if !SANITIZER_ANDROID
392 TSAN_INTERCEPTOR(int, atexit
, void (*f
)()) {
393 if (UNLIKELY(cur_thread()->in_symbolizer
))
395 // We want to setup the atexit callback even if we are in ignored lib
397 SCOPED_INTERCEPTOR_RAW(atexit
, f
);
398 return setup_at_exit_wrapper(thr
, pc
, (void(*)())f
, 0, 0);
402 TSAN_INTERCEPTOR(int, __cxa_atexit
, void (*f
)(void *a
), void *arg
, void *dso
) {
403 if (UNLIKELY(cur_thread()->in_symbolizer
))
405 SCOPED_TSAN_INTERCEPTOR(__cxa_atexit
, f
, arg
, dso
);
406 return setup_at_exit_wrapper(thr
, pc
, (void(*)())f
, arg
, dso
);
409 static int setup_at_exit_wrapper(ThreadState
*thr
, uptr pc
, void(*f
)(),
410 void *arg
, void *dso
) {
411 AtExitCtx
*ctx
= (AtExitCtx
*)InternalAlloc(sizeof(AtExitCtx
));
414 Release(thr
, pc
, (uptr
)ctx
);
415 // Memory allocation in __cxa_atexit will race with free during exit,
416 // because we do not see synchronization around atexit callback list.
417 ThreadIgnoreBegin(thr
, pc
);
420 // NetBSD does not preserve the 2nd argument if dso is equal to 0
421 // Store ctx in a local stack-like structure
423 // Ensure thread-safety.
424 BlockingMutexLock
l(&interceptor_ctx()->atexit_mu
);
426 res
= REAL(__cxa_atexit
)((void (*)(void *a
))at_exit_wrapper
, 0, 0);
427 // Push AtExitCtx on the top of the stack of callback functions
429 interceptor_ctx()->AtExitStack
.PushBack(ctx
);
432 res
= REAL(__cxa_atexit
)(cxa_at_exit_wrapper
, ctx
, dso
);
434 ThreadIgnoreEnd(thr
, pc
);
438 #if !SANITIZER_MAC && !SANITIZER_NETBSD
439 static void on_exit_wrapper(int status
, void *arg
) {
440 ThreadState
*thr
= cur_thread();
442 Acquire(thr
, pc
, (uptr
)arg
);
443 AtExitCtx
*ctx
= (AtExitCtx
*)arg
;
444 ((void(*)(int status
, void *arg
))ctx
->f
)(status
, ctx
->arg
);
448 TSAN_INTERCEPTOR(int, on_exit
, void(*f
)(int, void*), void *arg
) {
449 if (UNLIKELY(cur_thread()->in_symbolizer
))
451 SCOPED_TSAN_INTERCEPTOR(on_exit
, f
, arg
);
452 AtExitCtx
*ctx
= (AtExitCtx
*)InternalAlloc(sizeof(AtExitCtx
));
453 ctx
->f
= (void(*)())f
;
455 Release(thr
, pc
, (uptr
)ctx
);
456 // Memory allocation in __cxa_atexit will race with free during exit,
457 // because we do not see synchronization around atexit callback list.
458 ThreadIgnoreBegin(thr
, pc
);
459 int res
= REAL(on_exit
)(on_exit_wrapper
, ctx
);
460 ThreadIgnoreEnd(thr
, pc
);
463 #define TSAN_MAYBE_INTERCEPT_ON_EXIT TSAN_INTERCEPT(on_exit)
465 #define TSAN_MAYBE_INTERCEPT_ON_EXIT
469 static void JmpBufGarbageCollect(ThreadState
*thr
, uptr sp
) {
470 for (uptr i
= 0; i
< thr
->jmp_bufs
.Size(); i
++) {
471 JmpBuf
*buf
= &thr
->jmp_bufs
[i
];
473 uptr sz
= thr
->jmp_bufs
.Size();
474 internal_memcpy(buf
, &thr
->jmp_bufs
[sz
- 1], sizeof(*buf
));
475 thr
->jmp_bufs
.PopBack();
481 static void SetJmp(ThreadState
*thr
, uptr sp
, uptr mangled_sp
) {
482 if (!thr
->is_inited
) // called from libc guts during bootstrap
485 JmpBufGarbageCollect(thr
, sp
);
487 JmpBuf
*buf
= thr
->jmp_bufs
.PushBack();
489 buf
->mangled_sp
= mangled_sp
;
490 buf
->shadow_stack_pos
= thr
->shadow_stack_pos
;
491 ThreadSignalContext
*sctx
= SigCtx(thr
);
492 buf
->int_signal_send
= sctx
? sctx
->int_signal_send
: 0;
493 buf
->in_blocking_func
= sctx
?
494 atomic_load(&sctx
->in_blocking_func
, memory_order_relaxed
) :
496 buf
->in_signal_handler
= atomic_load(&thr
->in_signal_handler
,
497 memory_order_relaxed
);
500 static void LongJmp(ThreadState
*thr
, uptr
*env
) {
502 uptr mangled_sp
= env
[0];
503 #elif SANITIZER_FREEBSD
504 uptr mangled_sp
= env
[2];
505 #elif SANITIZER_NETBSD
506 uptr mangled_sp
= env
[6];
510 (GetMacosVersion() >= MACOS_VERSION_MOJAVE
) ? env
[12] : env
[13];
512 uptr mangled_sp
= env
[2];
514 #elif SANITIZER_LINUX
516 uptr mangled_sp
= env
[13];
517 # elif defined(__mips64)
518 uptr mangled_sp
= env
[1];
520 uptr mangled_sp
= env
[6];
523 // Find the saved buf by mangled_sp.
524 for (uptr i
= 0; i
< thr
->jmp_bufs
.Size(); i
++) {
525 JmpBuf
*buf
= &thr
->jmp_bufs
[i
];
526 if (buf
->mangled_sp
== mangled_sp
) {
527 CHECK_GE(thr
->shadow_stack_pos
, buf
->shadow_stack_pos
);
529 while (thr
->shadow_stack_pos
> buf
->shadow_stack_pos
)
531 ThreadSignalContext
*sctx
= SigCtx(thr
);
533 sctx
->int_signal_send
= buf
->int_signal_send
;
534 atomic_store(&sctx
->in_blocking_func
, buf
->in_blocking_func
,
535 memory_order_relaxed
);
537 atomic_store(&thr
->in_signal_handler
, buf
->in_signal_handler
,
538 memory_order_relaxed
);
539 JmpBufGarbageCollect(thr
, buf
->sp
- 1); // do not collect buf->sp
543 Printf("ThreadSanitizer: can't find longjmp buf\n");
547 // FIXME: put everything below into a common extern "C" block?
548 extern "C" void __tsan_setjmp(uptr sp
, uptr mangled_sp
) {
549 SetJmp(cur_thread(), sp
, mangled_sp
);
553 TSAN_INTERCEPTOR(int, setjmp
, void *env
);
554 TSAN_INTERCEPTOR(int, _setjmp
, void *env
);
555 TSAN_INTERCEPTOR(int, sigsetjmp
, void *env
);
556 #else // SANITIZER_MAC
559 #define setjmp_symname __setjmp14
560 #define sigsetjmp_symname __sigsetjmp14
562 #define setjmp_symname setjmp
563 #define sigsetjmp_symname sigsetjmp
566 #define TSAN_INTERCEPTOR_SETJMP_(x) __interceptor_ ## x
567 #define TSAN_INTERCEPTOR_SETJMP__(x) TSAN_INTERCEPTOR_SETJMP_(x)
568 #define TSAN_INTERCEPTOR_SETJMP TSAN_INTERCEPTOR_SETJMP__(setjmp_symname)
569 #define TSAN_INTERCEPTOR_SIGSETJMP TSAN_INTERCEPTOR_SETJMP__(sigsetjmp_symname)
571 #define TSAN_STRING_SETJMP SANITIZER_STRINGIFY(setjmp_symname)
572 #define TSAN_STRING_SIGSETJMP SANITIZER_STRINGIFY(sigsetjmp_symname)
574 // Not called. Merely to satisfy TSAN_INTERCEPT().
575 extern "C" SANITIZER_INTERFACE_ATTRIBUTE
576 int TSAN_INTERCEPTOR_SETJMP(void *env
);
577 extern "C" int TSAN_INTERCEPTOR_SETJMP(void *env
) {
582 // FIXME: any reason to have a separate declaration?
583 extern "C" SANITIZER_INTERFACE_ATTRIBUTE
584 int __interceptor__setjmp(void *env
);
585 extern "C" int __interceptor__setjmp(void *env
) {
590 extern "C" SANITIZER_INTERFACE_ATTRIBUTE
591 int TSAN_INTERCEPTOR_SIGSETJMP(void *env
);
592 extern "C" int TSAN_INTERCEPTOR_SIGSETJMP(void *env
) {
597 #if !SANITIZER_NETBSD
598 extern "C" SANITIZER_INTERFACE_ATTRIBUTE
599 int __interceptor___sigsetjmp(void *env
);
600 extern "C" int __interceptor___sigsetjmp(void *env
) {
606 extern "C" int setjmp_symname(void *env
);
607 extern "C" int _setjmp(void *env
);
608 extern "C" int sigsetjmp_symname(void *env
);
609 #if !SANITIZER_NETBSD
610 extern "C" int __sigsetjmp(void *env
);
612 DEFINE_REAL(int, setjmp_symname
, void *env
)
613 DEFINE_REAL(int, _setjmp
, void *env
)
614 DEFINE_REAL(int, sigsetjmp_symname
, void *env
)
615 #if !SANITIZER_NETBSD
616 DEFINE_REAL(int, __sigsetjmp
, void *env
)
618 #endif // SANITIZER_MAC
621 #define longjmp_symname __longjmp14
622 #define siglongjmp_symname __siglongjmp14
624 #define longjmp_symname longjmp
625 #define siglongjmp_symname siglongjmp
628 TSAN_INTERCEPTOR(void, longjmp_symname
, uptr
*env
, int val
) {
629 // Note: if we call REAL(longjmp) in the context of ScopedInterceptor,
630 // bad things will happen. We will jump over ScopedInterceptor dtor and can
631 // leave thr->in_ignored_lib set.
633 SCOPED_INTERCEPTOR_RAW(longjmp_symname
, env
, val
);
635 LongJmp(cur_thread(), env
);
636 REAL(longjmp_symname
)(env
, val
);
639 TSAN_INTERCEPTOR(void, siglongjmp_symname
, uptr
*env
, int val
) {
641 SCOPED_INTERCEPTOR_RAW(siglongjmp_symname
, env
, val
);
643 LongJmp(cur_thread(), env
);
644 REAL(siglongjmp_symname
)(env
, val
);
648 TSAN_INTERCEPTOR(void, _longjmp
, uptr
*env
, int val
) {
650 SCOPED_INTERCEPTOR_RAW(_longjmp
, env
, val
);
652 LongJmp(cur_thread(), env
);
653 REAL(_longjmp
)(env
, val
);
658 TSAN_INTERCEPTOR(void*, malloc
, uptr size
) {
659 if (UNLIKELY(cur_thread()->in_symbolizer
))
660 return InternalAlloc(size
);
663 SCOPED_INTERCEPTOR_RAW(malloc
, size
);
664 p
= user_alloc(thr
, pc
, size
);
666 invoke_malloc_hook(p
, size
);
670 TSAN_INTERCEPTOR(void*, __libc_memalign
, uptr align
, uptr sz
) {
671 SCOPED_TSAN_INTERCEPTOR(__libc_memalign
, align
, sz
);
672 return user_memalign(thr
, pc
, align
, sz
);
675 TSAN_INTERCEPTOR(void*, calloc
, uptr size
, uptr n
) {
676 if (UNLIKELY(cur_thread()->in_symbolizer
))
677 return InternalCalloc(size
, n
);
680 SCOPED_INTERCEPTOR_RAW(calloc
, size
, n
);
681 p
= user_calloc(thr
, pc
, size
, n
);
683 invoke_malloc_hook(p
, n
* size
);
687 TSAN_INTERCEPTOR(void*, realloc
, void *p
, uptr size
) {
688 if (UNLIKELY(cur_thread()->in_symbolizer
))
689 return InternalRealloc(p
, size
);
693 SCOPED_INTERCEPTOR_RAW(realloc
, p
, size
);
694 p
= user_realloc(thr
, pc
, p
, size
);
696 invoke_malloc_hook(p
, size
);
700 TSAN_INTERCEPTOR(void, free
, void *p
) {
703 if (UNLIKELY(cur_thread()->in_symbolizer
))
704 return InternalFree(p
);
706 SCOPED_INTERCEPTOR_RAW(free
, p
);
707 user_free(thr
, pc
, p
);
710 TSAN_INTERCEPTOR(void, cfree
, void *p
) {
713 if (UNLIKELY(cur_thread()->in_symbolizer
))
714 return InternalFree(p
);
716 SCOPED_INTERCEPTOR_RAW(cfree
, p
);
717 user_free(thr
, pc
, p
);
720 TSAN_INTERCEPTOR(uptr
, malloc_usable_size
, void *p
) {
721 SCOPED_INTERCEPTOR_RAW(malloc_usable_size
, p
);
722 return user_alloc_usable_size(p
);
726 TSAN_INTERCEPTOR(char*, strcpy
, char *dst
, const char *src
) { // NOLINT
727 SCOPED_TSAN_INTERCEPTOR(strcpy
, dst
, src
); // NOLINT
728 uptr srclen
= internal_strlen(src
);
729 MemoryAccessRange(thr
, pc
, (uptr
)dst
, srclen
+ 1, true);
730 MemoryAccessRange(thr
, pc
, (uptr
)src
, srclen
+ 1, false);
731 return REAL(strcpy
)(dst
, src
); // NOLINT
734 TSAN_INTERCEPTOR(char*, strncpy
, char *dst
, char *src
, uptr n
) {
735 SCOPED_TSAN_INTERCEPTOR(strncpy
, dst
, src
, n
);
736 uptr srclen
= internal_strnlen(src
, n
);
737 MemoryAccessRange(thr
, pc
, (uptr
)dst
, n
, true);
738 MemoryAccessRange(thr
, pc
, (uptr
)src
, min(srclen
+ 1, n
), false);
739 return REAL(strncpy
)(dst
, src
, n
);
742 TSAN_INTERCEPTOR(char*, strdup
, const char *str
) {
743 SCOPED_TSAN_INTERCEPTOR(strdup
, str
);
744 // strdup will call malloc, so no instrumentation is required here.
745 return REAL(strdup
)(str
);
748 static bool fix_mmap_addr(void **addr
, long_t sz
, int flags
) {
750 if (!IsAppMem((uptr
)*addr
) || !IsAppMem((uptr
)*addr
+ sz
- 1)) {
751 if (flags
& MAP_FIXED
) {
752 errno
= errno_EINVAL
;
762 template <class Mmap
>
763 static void *mmap_interceptor(ThreadState
*thr
, uptr pc
, Mmap real_mmap
,
764 void *addr
, SIZE_T sz
, int prot
, int flags
,
765 int fd
, OFF64_T off
) {
766 if (!fix_mmap_addr(&addr
, sz
, flags
)) return MAP_FAILED
;
767 void *res
= real_mmap(addr
, sz
, prot
, flags
, fd
, off
);
768 if (res
!= MAP_FAILED
) {
769 if (fd
> 0) FdAccess(thr
, pc
, fd
);
770 if (thr
->ignore_reads_and_writes
== 0)
771 MemoryRangeImitateWrite(thr
, pc
, (uptr
)res
, sz
);
773 MemoryResetRange(thr
, pc
, (uptr
)res
, sz
);
778 TSAN_INTERCEPTOR(int, munmap
, void *addr
, long_t sz
) {
779 SCOPED_TSAN_INTERCEPTOR(munmap
, addr
, sz
);
781 // If sz == 0, munmap will return EINVAL and don't unmap any memory.
782 DontNeedShadowFor((uptr
)addr
, sz
);
783 ScopedGlobalProcessor sgp
;
784 ctx
->metamap
.ResetRange(thr
->proc(), (uptr
)addr
, (uptr
)sz
);
786 int res
= REAL(munmap
)(addr
, sz
);
791 TSAN_INTERCEPTOR(void*, memalign
, uptr align
, uptr sz
) {
792 SCOPED_INTERCEPTOR_RAW(memalign
, align
, sz
);
793 return user_memalign(thr
, pc
, align
, sz
);
795 #define TSAN_MAYBE_INTERCEPT_MEMALIGN TSAN_INTERCEPT(memalign)
797 #define TSAN_MAYBE_INTERCEPT_MEMALIGN
801 TSAN_INTERCEPTOR(void*, aligned_alloc
, uptr align
, uptr sz
) {
802 if (UNLIKELY(cur_thread()->in_symbolizer
))
803 return InternalAlloc(sz
, nullptr, align
);
804 SCOPED_INTERCEPTOR_RAW(aligned_alloc
, align
, sz
);
805 return user_aligned_alloc(thr
, pc
, align
, sz
);
808 TSAN_INTERCEPTOR(void*, valloc
, uptr sz
) {
809 if (UNLIKELY(cur_thread()->in_symbolizer
))
810 return InternalAlloc(sz
, nullptr, GetPageSizeCached());
811 SCOPED_INTERCEPTOR_RAW(valloc
, sz
);
812 return user_valloc(thr
, pc
, sz
);
817 TSAN_INTERCEPTOR(void*, pvalloc
, uptr sz
) {
818 if (UNLIKELY(cur_thread()->in_symbolizer
)) {
819 uptr PageSize
= GetPageSizeCached();
820 sz
= sz
? RoundUpTo(sz
, PageSize
) : PageSize
;
821 return InternalAlloc(sz
, nullptr, PageSize
);
823 SCOPED_INTERCEPTOR_RAW(pvalloc
, sz
);
824 return user_pvalloc(thr
, pc
, sz
);
826 #define TSAN_MAYBE_INTERCEPT_PVALLOC TSAN_INTERCEPT(pvalloc)
828 #define TSAN_MAYBE_INTERCEPT_PVALLOC
832 TSAN_INTERCEPTOR(int, posix_memalign
, void **memptr
, uptr align
, uptr sz
) {
833 if (UNLIKELY(cur_thread()->in_symbolizer
)) {
834 void *p
= InternalAlloc(sz
, nullptr, align
);
840 SCOPED_INTERCEPTOR_RAW(posix_memalign
, memptr
, align
, sz
);
841 return user_posix_memalign(thr
, pc
, memptr
, align
, sz
);
845 // __cxa_guard_acquire and friends need to be intercepted in a special way -
846 // regular interceptors will break statically-linked libstdc++. Linux
847 // interceptors are especially defined as weak functions (so that they don't
848 // cause link errors when user defines them as well). So they silently
849 // auto-disable themselves when such symbol is already present in the binary. If
850 // we link libstdc++ statically, it will bring own __cxa_guard_acquire which
851 // will silently replace our interceptor. That's why on Linux we simply export
852 // these interceptors with INTERFACE_ATTRIBUTE.
853 // On OS X, we don't support statically linking, so we just use a regular
856 #define STDCXX_INTERCEPTOR TSAN_INTERCEPTOR
858 #define STDCXX_INTERCEPTOR(rettype, name, ...) \
859 extern "C" rettype INTERFACE_ATTRIBUTE name(__VA_ARGS__)
862 // Used in thread-safe function static initialization.
863 STDCXX_INTERCEPTOR(int, __cxa_guard_acquire
, atomic_uint32_t
*g
) {
864 SCOPED_INTERCEPTOR_RAW(__cxa_guard_acquire
, g
);
866 u32 cmp
= atomic_load(g
, memory_order_acquire
);
868 if (atomic_compare_exchange_strong(g
, &cmp
, 1<<16, memory_order_relaxed
))
870 } else if (cmp
== 1) {
871 Acquire(thr
, pc
, (uptr
)g
);
874 internal_sched_yield();
879 STDCXX_INTERCEPTOR(void, __cxa_guard_release
, atomic_uint32_t
*g
) {
880 SCOPED_INTERCEPTOR_RAW(__cxa_guard_release
, g
);
881 Release(thr
, pc
, (uptr
)g
);
882 atomic_store(g
, 1, memory_order_release
);
885 STDCXX_INTERCEPTOR(void, __cxa_guard_abort
, atomic_uint32_t
*g
) {
886 SCOPED_INTERCEPTOR_RAW(__cxa_guard_abort
, g
);
887 atomic_store(g
, 0, memory_order_relaxed
);
891 void DestroyThreadState() {
892 ThreadState
*thr
= cur_thread();
893 Processor
*proc
= thr
->proc();
895 ProcUnwire(proc
, thr
);
897 ThreadSignalContext
*sctx
= thr
->signal_ctx
;
900 UnmapOrDie(sctx
, sizeof(*sctx
));
903 cur_thread_finalize();
905 } // namespace __tsan
907 #if !SANITIZER_MAC && !SANITIZER_NETBSD && !SANITIZER_FREEBSD
908 static void thread_finalize(void *v
) {
911 if (pthread_setspecific(interceptor_ctx()->finalize_key
,
912 (void*)(iter
- 1))) {
913 Printf("ThreadSanitizer: failed to set thread key\n");
918 DestroyThreadState();
924 void* (*callback
)(void *arg
);
926 atomic_uintptr_t tid
;
929 extern "C" void *__tsan_thread_start_func(void *arg
) {
930 ThreadParam
*p
= (ThreadParam
*)arg
;
931 void* (*callback
)(void *arg
) = p
->callback
;
932 void *param
= p
->param
;
935 ThreadState
*thr
= cur_thread();
936 // Thread-local state is not initialized yet.
937 ScopedIgnoreInterceptors ignore
;
938 #if !SANITIZER_MAC && !SANITIZER_NETBSD && !SANITIZER_FREEBSD
939 ThreadIgnoreBegin(thr
, 0);
940 if (pthread_setspecific(interceptor_ctx()->finalize_key
,
941 (void *)GetPthreadDestructorIterations())) {
942 Printf("ThreadSanitizer: failed to set thread key\n");
945 ThreadIgnoreEnd(thr
, 0);
947 while ((tid
= atomic_load(&p
->tid
, memory_order_acquire
)) == 0)
948 internal_sched_yield();
949 Processor
*proc
= ProcCreate();
951 ThreadStart(thr
, tid
, GetTid(), /*workerthread*/ false);
952 atomic_store(&p
->tid
, 0, memory_order_release
);
954 void *res
= callback(param
);
955 // Prevent the callback from being tail called,
956 // it mixes up stack traces.
957 volatile int foo
= 42;
962 TSAN_INTERCEPTOR(int, pthread_create
,
963 void *th
, void *attr
, void *(*callback
)(void*), void * param
) {
964 SCOPED_INTERCEPTOR_RAW(pthread_create
, th
, attr
, callback
, param
);
966 MaybeSpawnBackgroundThread();
968 if (ctx
->after_multithreaded_fork
) {
969 if (flags()->die_after_fork
) {
970 Report("ThreadSanitizer: starting new threads after multi-threaded "
971 "fork is not supported. Dying (set die_after_fork=0 to override)\n");
974 VPrintf(1, "ThreadSanitizer: starting new threads after multi-threaded "
975 "fork is not supported (pid %d). Continuing because of "
976 "die_after_fork=0, but you are on your own\n", internal_getpid());
979 __sanitizer_pthread_attr_t myattr
;
981 pthread_attr_init(&myattr
);
985 REAL(pthread_attr_getdetachstate
)(attr
, &detached
);
986 AdjustStackSize(attr
);
989 p
.callback
= callback
;
991 atomic_store(&p
.tid
, 0, memory_order_relaxed
);
994 // Otherwise we see false positives in pthread stack manipulation.
995 ScopedIgnoreInterceptors ignore
;
996 ThreadIgnoreBegin(thr
, pc
);
997 res
= REAL(pthread_create
)(th
, attr
, __tsan_thread_start_func
, &p
);
998 ThreadIgnoreEnd(thr
, pc
);
1001 int tid
= ThreadCreate(thr
, pc
, *(uptr
*)th
, IsStateDetached(detached
));
1003 // Synchronization on p.tid serves two purposes:
1004 // 1. ThreadCreate must finish before the new thread starts.
1005 // Otherwise the new thread can call pthread_detach, but the pthread_t
1006 // identifier is not yet registered in ThreadRegistry by ThreadCreate.
1007 // 2. ThreadStart must finish before this thread continues.
1008 // Otherwise, this thread can call pthread_detach and reset thr->sync
1009 // before the new thread got a chance to acquire from it in ThreadStart.
1010 atomic_store(&p
.tid
, tid
, memory_order_release
);
1011 while (atomic_load(&p
.tid
, memory_order_acquire
) != 0)
1012 internal_sched_yield();
1014 if (attr
== &myattr
)
1015 pthread_attr_destroy(&myattr
);
1019 TSAN_INTERCEPTOR(int, pthread_join
, void *th
, void **ret
) {
1020 SCOPED_INTERCEPTOR_RAW(pthread_join
, th
, ret
);
1021 int tid
= ThreadTid(thr
, pc
, (uptr
)th
);
1022 ThreadIgnoreBegin(thr
, pc
);
1023 int res
= BLOCK_REAL(pthread_join
)(th
, ret
);
1024 ThreadIgnoreEnd(thr
, pc
);
1026 ThreadJoin(thr
, pc
, tid
);
1031 DEFINE_REAL_PTHREAD_FUNCTIONS
1033 TSAN_INTERCEPTOR(int, pthread_detach
, void *th
) {
1034 SCOPED_TSAN_INTERCEPTOR(pthread_detach
, th
);
1035 int tid
= ThreadTid(thr
, pc
, (uptr
)th
);
1036 int res
= REAL(pthread_detach
)(th
);
1038 ThreadDetach(thr
, pc
, tid
);
1044 // NPTL implementation of pthread_cond has 2 versions (2.2.5 and 2.3.2).
1045 // pthread_cond_t has different size in the different versions.
1046 // If call new REAL functions for old pthread_cond_t, they will corrupt memory
1047 // after pthread_cond_t (old cond is smaller).
1048 // If we call old REAL functions for new pthread_cond_t, we will lose some
1049 // functionality (e.g. old functions do not support waiting against
1051 // Proper handling would require to have 2 versions of interceptors as well.
1052 // But this is messy, in particular requires linker scripts when sanitizer
1053 // runtime is linked into a shared library.
1054 // Instead we assume we don't have dynamic libraries built against old
1055 // pthread (2.2.5 is dated by 2002). And provide legacy_pthread_cond flag
1056 // that allows to work with old libraries (but this mode does not support
1057 // some features, e.g. pthread_condattr_getpshared).
1058 static void *init_cond(void *c
, bool force
= false) {
1059 // sizeof(pthread_cond_t) >= sizeof(uptr) in both versions.
1060 // So we allocate additional memory on the side large enough to hold
1061 // any pthread_cond_t object. Always call new REAL functions, but pass
1062 // the aux object to them.
1063 // Note: the code assumes that PTHREAD_COND_INITIALIZER initializes
1064 // first word of pthread_cond_t to zero.
1065 // It's all relevant only for linux.
1066 if (!common_flags()->legacy_pthread_cond
)
1068 atomic_uintptr_t
*p
= (atomic_uintptr_t
*)c
;
1069 uptr cond
= atomic_load(p
, memory_order_acquire
);
1070 if (!force
&& cond
!= 0)
1072 void *newcond
= WRAP(malloc
)(pthread_cond_t_sz
);
1073 internal_memset(newcond
, 0, pthread_cond_t_sz
);
1074 if (atomic_compare_exchange_strong(p
, &cond
, (uptr
)newcond
,
1075 memory_order_acq_rel
))
1077 WRAP(free
)(newcond
);
1081 struct CondMutexUnlockCtx
{
1082 ScopedInterceptor
*si
;
1088 static void cond_mutex_unlock(CondMutexUnlockCtx
*arg
) {
1089 // pthread_cond_wait interceptor has enabled async signal delivery
1090 // (see BlockingCall below). Disable async signals since we are running
1091 // tsan code. Also ScopedInterceptor and BlockingCall destructors won't run
1092 // since the thread is cancelled, so we have to manually execute them
1093 // (the thread still can run some user code due to pthread_cleanup_push).
1094 ThreadSignalContext
*ctx
= SigCtx(arg
->thr
);
1095 CHECK_EQ(atomic_load(&ctx
->in_blocking_func
, memory_order_relaxed
), 1);
1096 atomic_store(&ctx
->in_blocking_func
, 0, memory_order_relaxed
);
1097 MutexPostLock(arg
->thr
, arg
->pc
, (uptr
)arg
->m
, MutexFlagDoPreLockOnPostLock
);
1098 // Undo BlockingCall ctor effects.
1099 arg
->thr
->ignore_interceptors
--;
1100 arg
->si
->~ScopedInterceptor();
1103 INTERCEPTOR(int, pthread_cond_init
, void *c
, void *a
) {
1104 void *cond
= init_cond(c
, true);
1105 SCOPED_TSAN_INTERCEPTOR(pthread_cond_init
, cond
, a
);
1106 MemoryAccessRange(thr
, pc
, (uptr
)c
, sizeof(uptr
), true);
1107 return REAL(pthread_cond_init
)(cond
, a
);
1110 static int cond_wait(ThreadState
*thr
, uptr pc
, ScopedInterceptor
*si
,
1111 int (*fn
)(void *c
, void *m
, void *abstime
), void *c
,
1113 MemoryAccessRange(thr
, pc
, (uptr
)c
, sizeof(uptr
), false);
1114 MutexUnlock(thr
, pc
, (uptr
)m
);
1115 CondMutexUnlockCtx arg
= {si
, thr
, pc
, m
};
1117 // This ensures that we handle mutex lock even in case of pthread_cancel.
1118 // See test/tsan/cond_cancel.cc.
1120 // Enable signal delivery while the thread is blocked.
1121 BlockingCall
bc(thr
);
1122 res
= call_pthread_cancel_with_cleanup(
1123 fn
, c
, m
, t
, (void (*)(void *arg
))cond_mutex_unlock
, &arg
);
1125 if (res
== errno_EOWNERDEAD
) MutexRepair(thr
, pc
, (uptr
)m
);
1126 MutexPostLock(thr
, pc
, (uptr
)m
, MutexFlagDoPreLockOnPostLock
);
1130 INTERCEPTOR(int, pthread_cond_wait
, void *c
, void *m
) {
1131 void *cond
= init_cond(c
);
1132 SCOPED_TSAN_INTERCEPTOR(pthread_cond_wait
, cond
, m
);
1133 return cond_wait(thr
, pc
, &si
, (int (*)(void *c
, void *m
, void *abstime
))REAL(
1138 INTERCEPTOR(int, pthread_cond_timedwait
, void *c
, void *m
, void *abstime
) {
1139 void *cond
= init_cond(c
);
1140 SCOPED_TSAN_INTERCEPTOR(pthread_cond_timedwait
, cond
, m
, abstime
);
1141 return cond_wait(thr
, pc
, &si
, REAL(pthread_cond_timedwait
), cond
, m
,
1146 INTERCEPTOR(int, pthread_cond_timedwait_relative_np
, void *c
, void *m
,
1148 void *cond
= init_cond(c
);
1149 SCOPED_TSAN_INTERCEPTOR(pthread_cond_timedwait_relative_np
, cond
, m
, reltime
);
1150 return cond_wait(thr
, pc
, &si
, REAL(pthread_cond_timedwait_relative_np
), cond
,
1155 INTERCEPTOR(int, pthread_cond_signal
, void *c
) {
1156 void *cond
= init_cond(c
);
1157 SCOPED_TSAN_INTERCEPTOR(pthread_cond_signal
, cond
);
1158 MemoryAccessRange(thr
, pc
, (uptr
)c
, sizeof(uptr
), false);
1159 return REAL(pthread_cond_signal
)(cond
);
1162 INTERCEPTOR(int, pthread_cond_broadcast
, void *c
) {
1163 void *cond
= init_cond(c
);
1164 SCOPED_TSAN_INTERCEPTOR(pthread_cond_broadcast
, cond
);
1165 MemoryAccessRange(thr
, pc
, (uptr
)c
, sizeof(uptr
), false);
1166 return REAL(pthread_cond_broadcast
)(cond
);
1169 INTERCEPTOR(int, pthread_cond_destroy
, void *c
) {
1170 void *cond
= init_cond(c
);
1171 SCOPED_TSAN_INTERCEPTOR(pthread_cond_destroy
, cond
);
1172 MemoryAccessRange(thr
, pc
, (uptr
)c
, sizeof(uptr
), true);
1173 int res
= REAL(pthread_cond_destroy
)(cond
);
1174 if (common_flags()->legacy_pthread_cond
) {
1175 // Free our aux cond and zero the pointer to not leave dangling pointers.
1177 atomic_store((atomic_uintptr_t
*)c
, 0, memory_order_relaxed
);
1182 TSAN_INTERCEPTOR(int, pthread_mutex_init
, void *m
, void *a
) {
1183 SCOPED_TSAN_INTERCEPTOR(pthread_mutex_init
, m
, a
);
1184 int res
= REAL(pthread_mutex_init
)(m
, a
);
1189 if (REAL(pthread_mutexattr_gettype
)(a
, &type
) == 0)
1190 if (type
== PTHREAD_MUTEX_RECURSIVE
||
1191 type
== PTHREAD_MUTEX_RECURSIVE_NP
)
1192 flagz
|= MutexFlagWriteReentrant
;
1194 MutexCreate(thr
, pc
, (uptr
)m
, flagz
);
1199 TSAN_INTERCEPTOR(int, pthread_mutex_destroy
, void *m
) {
1200 SCOPED_TSAN_INTERCEPTOR(pthread_mutex_destroy
, m
);
1201 int res
= REAL(pthread_mutex_destroy
)(m
);
1202 if (res
== 0 || res
== errno_EBUSY
) {
1203 MutexDestroy(thr
, pc
, (uptr
)m
);
1208 TSAN_INTERCEPTOR(int, pthread_mutex_trylock
, void *m
) {
1209 SCOPED_TSAN_INTERCEPTOR(pthread_mutex_trylock
, m
);
1210 int res
= REAL(pthread_mutex_trylock
)(m
);
1211 if (res
== errno_EOWNERDEAD
)
1212 MutexRepair(thr
, pc
, (uptr
)m
);
1213 if (res
== 0 || res
== errno_EOWNERDEAD
)
1214 MutexPostLock(thr
, pc
, (uptr
)m
, MutexFlagTryLock
);
1219 TSAN_INTERCEPTOR(int, pthread_mutex_timedlock
, void *m
, void *abstime
) {
1220 SCOPED_TSAN_INTERCEPTOR(pthread_mutex_timedlock
, m
, abstime
);
1221 int res
= REAL(pthread_mutex_timedlock
)(m
, abstime
);
1223 MutexPostLock(thr
, pc
, (uptr
)m
, MutexFlagTryLock
);
1230 TSAN_INTERCEPTOR(int, pthread_spin_init
, void *m
, int pshared
) {
1231 SCOPED_TSAN_INTERCEPTOR(pthread_spin_init
, m
, pshared
);
1232 int res
= REAL(pthread_spin_init
)(m
, pshared
);
1234 MutexCreate(thr
, pc
, (uptr
)m
);
1239 TSAN_INTERCEPTOR(int, pthread_spin_destroy
, void *m
) {
1240 SCOPED_TSAN_INTERCEPTOR(pthread_spin_destroy
, m
);
1241 int res
= REAL(pthread_spin_destroy
)(m
);
1243 MutexDestroy(thr
, pc
, (uptr
)m
);
1248 TSAN_INTERCEPTOR(int, pthread_spin_lock
, void *m
) {
1249 SCOPED_TSAN_INTERCEPTOR(pthread_spin_lock
, m
);
1250 MutexPreLock(thr
, pc
, (uptr
)m
);
1251 int res
= REAL(pthread_spin_lock
)(m
);
1253 MutexPostLock(thr
, pc
, (uptr
)m
);
1258 TSAN_INTERCEPTOR(int, pthread_spin_trylock
, void *m
) {
1259 SCOPED_TSAN_INTERCEPTOR(pthread_spin_trylock
, m
);
1260 int res
= REAL(pthread_spin_trylock
)(m
);
1262 MutexPostLock(thr
, pc
, (uptr
)m
, MutexFlagTryLock
);
1267 TSAN_INTERCEPTOR(int, pthread_spin_unlock
, void *m
) {
1268 SCOPED_TSAN_INTERCEPTOR(pthread_spin_unlock
, m
);
1269 MutexUnlock(thr
, pc
, (uptr
)m
);
1270 int res
= REAL(pthread_spin_unlock
)(m
);
1275 TSAN_INTERCEPTOR(int, pthread_rwlock_init
, void *m
, void *a
) {
1276 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_init
, m
, a
);
1277 int res
= REAL(pthread_rwlock_init
)(m
, a
);
1279 MutexCreate(thr
, pc
, (uptr
)m
);
1284 TSAN_INTERCEPTOR(int, pthread_rwlock_destroy
, void *m
) {
1285 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_destroy
, m
);
1286 int res
= REAL(pthread_rwlock_destroy
)(m
);
1288 MutexDestroy(thr
, pc
, (uptr
)m
);
1293 TSAN_INTERCEPTOR(int, pthread_rwlock_rdlock
, void *m
) {
1294 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_rdlock
, m
);
1295 MutexPreReadLock(thr
, pc
, (uptr
)m
);
1296 int res
= REAL(pthread_rwlock_rdlock
)(m
);
1298 MutexPostReadLock(thr
, pc
, (uptr
)m
);
1303 TSAN_INTERCEPTOR(int, pthread_rwlock_tryrdlock
, void *m
) {
1304 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_tryrdlock
, m
);
1305 int res
= REAL(pthread_rwlock_tryrdlock
)(m
);
1307 MutexPostReadLock(thr
, pc
, (uptr
)m
, MutexFlagTryLock
);
1313 TSAN_INTERCEPTOR(int, pthread_rwlock_timedrdlock
, void *m
, void *abstime
) {
1314 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_timedrdlock
, m
, abstime
);
1315 int res
= REAL(pthread_rwlock_timedrdlock
)(m
, abstime
);
1317 MutexPostReadLock(thr
, pc
, (uptr
)m
);
1323 TSAN_INTERCEPTOR(int, pthread_rwlock_wrlock
, void *m
) {
1324 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_wrlock
, m
);
1325 MutexPreLock(thr
, pc
, (uptr
)m
);
1326 int res
= REAL(pthread_rwlock_wrlock
)(m
);
1328 MutexPostLock(thr
, pc
, (uptr
)m
);
1333 TSAN_INTERCEPTOR(int, pthread_rwlock_trywrlock
, void *m
) {
1334 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_trywrlock
, m
);
1335 int res
= REAL(pthread_rwlock_trywrlock
)(m
);
1337 MutexPostLock(thr
, pc
, (uptr
)m
, MutexFlagTryLock
);
1343 TSAN_INTERCEPTOR(int, pthread_rwlock_timedwrlock
, void *m
, void *abstime
) {
1344 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_timedwrlock
, m
, abstime
);
1345 int res
= REAL(pthread_rwlock_timedwrlock
)(m
, abstime
);
1347 MutexPostLock(thr
, pc
, (uptr
)m
, MutexFlagTryLock
);
1353 TSAN_INTERCEPTOR(int, pthread_rwlock_unlock
, void *m
) {
1354 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_unlock
, m
);
1355 MutexReadOrWriteUnlock(thr
, pc
, (uptr
)m
);
1356 int res
= REAL(pthread_rwlock_unlock
)(m
);
1361 TSAN_INTERCEPTOR(int, pthread_barrier_init
, void *b
, void *a
, unsigned count
) {
1362 SCOPED_TSAN_INTERCEPTOR(pthread_barrier_init
, b
, a
, count
);
1363 MemoryWrite(thr
, pc
, (uptr
)b
, kSizeLog1
);
1364 int res
= REAL(pthread_barrier_init
)(b
, a
, count
);
1368 TSAN_INTERCEPTOR(int, pthread_barrier_destroy
, void *b
) {
1369 SCOPED_TSAN_INTERCEPTOR(pthread_barrier_destroy
, b
);
1370 MemoryWrite(thr
, pc
, (uptr
)b
, kSizeLog1
);
1371 int res
= REAL(pthread_barrier_destroy
)(b
);
1375 TSAN_INTERCEPTOR(int, pthread_barrier_wait
, void *b
) {
1376 SCOPED_TSAN_INTERCEPTOR(pthread_barrier_wait
, b
);
1377 Release(thr
, pc
, (uptr
)b
);
1378 MemoryRead(thr
, pc
, (uptr
)b
, kSizeLog1
);
1379 int res
= REAL(pthread_barrier_wait
)(b
);
1380 MemoryRead(thr
, pc
, (uptr
)b
, kSizeLog1
);
1381 if (res
== 0 || res
== PTHREAD_BARRIER_SERIAL_THREAD
) {
1382 Acquire(thr
, pc
, (uptr
)b
);
1388 TSAN_INTERCEPTOR(int, pthread_once
, void *o
, void (*f
)()) {
1389 SCOPED_INTERCEPTOR_RAW(pthread_once
, o
, f
);
1390 if (o
== 0 || f
== 0)
1391 return errno_EINVAL
;
1395 a
= static_cast<atomic_uint32_t
*>((void *)((char *)o
+ sizeof(long_t
)));
1396 else if (SANITIZER_NETBSD
)
1397 a
= static_cast<atomic_uint32_t
*>
1398 ((void *)((char *)o
+ __sanitizer::pthread_mutex_t_sz
));
1400 a
= static_cast<atomic_uint32_t
*>(o
);
1402 u32 v
= atomic_load(a
, memory_order_acquire
);
1403 if (v
== 0 && atomic_compare_exchange_strong(a
, &v
, 1,
1404 memory_order_relaxed
)) {
1406 if (!thr
->in_ignored_lib
)
1407 Release(thr
, pc
, (uptr
)o
);
1408 atomic_store(a
, 2, memory_order_release
);
1411 internal_sched_yield();
1412 v
= atomic_load(a
, memory_order_acquire
);
1414 if (!thr
->in_ignored_lib
)
1415 Acquire(thr
, pc
, (uptr
)o
);
1420 #if SANITIZER_LINUX && !SANITIZER_ANDROID
1421 TSAN_INTERCEPTOR(int, __fxstat
, int version
, int fd
, void *buf
) {
1422 SCOPED_TSAN_INTERCEPTOR(__fxstat
, version
, fd
, buf
);
1424 FdAccess(thr
, pc
, fd
);
1425 return REAL(__fxstat
)(version
, fd
, buf
);
1427 #define TSAN_MAYBE_INTERCEPT___FXSTAT TSAN_INTERCEPT(__fxstat)
1429 #define TSAN_MAYBE_INTERCEPT___FXSTAT
1432 TSAN_INTERCEPTOR(int, fstat
, int fd
, void *buf
) {
1433 #if SANITIZER_FREEBSD || SANITIZER_MAC || SANITIZER_ANDROID || SANITIZER_NETBSD
1434 SCOPED_TSAN_INTERCEPTOR(fstat
, fd
, buf
);
1436 FdAccess(thr
, pc
, fd
);
1437 return REAL(fstat
)(fd
, buf
);
1439 SCOPED_TSAN_INTERCEPTOR(__fxstat
, 0, fd
, buf
);
1441 FdAccess(thr
, pc
, fd
);
1442 return REAL(__fxstat
)(0, fd
, buf
);
1446 #if SANITIZER_LINUX && !SANITIZER_ANDROID
1447 TSAN_INTERCEPTOR(int, __fxstat64
, int version
, int fd
, void *buf
) {
1448 SCOPED_TSAN_INTERCEPTOR(__fxstat64
, version
, fd
, buf
);
1450 FdAccess(thr
, pc
, fd
);
1451 return REAL(__fxstat64
)(version
, fd
, buf
);
1453 #define TSAN_MAYBE_INTERCEPT___FXSTAT64 TSAN_INTERCEPT(__fxstat64)
1455 #define TSAN_MAYBE_INTERCEPT___FXSTAT64
1458 #if SANITIZER_LINUX && !SANITIZER_ANDROID
1459 TSAN_INTERCEPTOR(int, fstat64
, int fd
, void *buf
) {
1460 SCOPED_TSAN_INTERCEPTOR(__fxstat64
, 0, fd
, buf
);
1462 FdAccess(thr
, pc
, fd
);
1463 return REAL(__fxstat64
)(0, fd
, buf
);
1465 #define TSAN_MAYBE_INTERCEPT_FSTAT64 TSAN_INTERCEPT(fstat64)
1467 #define TSAN_MAYBE_INTERCEPT_FSTAT64
1470 TSAN_INTERCEPTOR(int, open
, const char *name
, int flags
, int mode
) {
1471 SCOPED_TSAN_INTERCEPTOR(open
, name
, flags
, mode
);
1472 READ_STRING(thr
, pc
, name
, 0);
1473 int fd
= REAL(open
)(name
, flags
, mode
);
1475 FdFileCreate(thr
, pc
, fd
);
1480 TSAN_INTERCEPTOR(int, open64
, const char *name
, int flags
, int mode
) {
1481 SCOPED_TSAN_INTERCEPTOR(open64
, name
, flags
, mode
);
1482 READ_STRING(thr
, pc
, name
, 0);
1483 int fd
= REAL(open64
)(name
, flags
, mode
);
1485 FdFileCreate(thr
, pc
, fd
);
1488 #define TSAN_MAYBE_INTERCEPT_OPEN64 TSAN_INTERCEPT(open64)
1490 #define TSAN_MAYBE_INTERCEPT_OPEN64
1493 TSAN_INTERCEPTOR(int, creat
, const char *name
, int mode
) {
1494 SCOPED_TSAN_INTERCEPTOR(creat
, name
, mode
);
1495 READ_STRING(thr
, pc
, name
, 0);
1496 int fd
= REAL(creat
)(name
, mode
);
1498 FdFileCreate(thr
, pc
, fd
);
1503 TSAN_INTERCEPTOR(int, creat64
, const char *name
, int mode
) {
1504 SCOPED_TSAN_INTERCEPTOR(creat64
, name
, mode
);
1505 READ_STRING(thr
, pc
, name
, 0);
1506 int fd
= REAL(creat64
)(name
, mode
);
1508 FdFileCreate(thr
, pc
, fd
);
1511 #define TSAN_MAYBE_INTERCEPT_CREAT64 TSAN_INTERCEPT(creat64)
1513 #define TSAN_MAYBE_INTERCEPT_CREAT64
1516 TSAN_INTERCEPTOR(int, dup
, int oldfd
) {
1517 SCOPED_TSAN_INTERCEPTOR(dup
, oldfd
);
1518 int newfd
= REAL(dup
)(oldfd
);
1519 if (oldfd
>= 0 && newfd
>= 0 && newfd
!= oldfd
)
1520 FdDup(thr
, pc
, oldfd
, newfd
, true);
1524 TSAN_INTERCEPTOR(int, dup2
, int oldfd
, int newfd
) {
1525 SCOPED_TSAN_INTERCEPTOR(dup2
, oldfd
, newfd
);
1526 int newfd2
= REAL(dup2
)(oldfd
, newfd
);
1527 if (oldfd
>= 0 && newfd2
>= 0 && newfd2
!= oldfd
)
1528 FdDup(thr
, pc
, oldfd
, newfd2
, false);
1533 TSAN_INTERCEPTOR(int, dup3
, int oldfd
, int newfd
, int flags
) {
1534 SCOPED_TSAN_INTERCEPTOR(dup3
, oldfd
, newfd
, flags
);
1535 int newfd2
= REAL(dup3
)(oldfd
, newfd
, flags
);
1536 if (oldfd
>= 0 && newfd2
>= 0 && newfd2
!= oldfd
)
1537 FdDup(thr
, pc
, oldfd
, newfd2
, false);
1543 TSAN_INTERCEPTOR(int, eventfd
, unsigned initval
, int flags
) {
1544 SCOPED_TSAN_INTERCEPTOR(eventfd
, initval
, flags
);
1545 int fd
= REAL(eventfd
)(initval
, flags
);
1547 FdEventCreate(thr
, pc
, fd
);
1550 #define TSAN_MAYBE_INTERCEPT_EVENTFD TSAN_INTERCEPT(eventfd)
1552 #define TSAN_MAYBE_INTERCEPT_EVENTFD
1556 TSAN_INTERCEPTOR(int, signalfd
, int fd
, void *mask
, int flags
) {
1557 SCOPED_TSAN_INTERCEPTOR(signalfd
, fd
, mask
, flags
);
1559 FdClose(thr
, pc
, fd
);
1560 fd
= REAL(signalfd
)(fd
, mask
, flags
);
1562 FdSignalCreate(thr
, pc
, fd
);
1565 #define TSAN_MAYBE_INTERCEPT_SIGNALFD TSAN_INTERCEPT(signalfd)
1567 #define TSAN_MAYBE_INTERCEPT_SIGNALFD
1571 TSAN_INTERCEPTOR(int, inotify_init
, int fake
) {
1572 SCOPED_TSAN_INTERCEPTOR(inotify_init
, fake
);
1573 int fd
= REAL(inotify_init
)(fake
);
1575 FdInotifyCreate(thr
, pc
, fd
);
1578 #define TSAN_MAYBE_INTERCEPT_INOTIFY_INIT TSAN_INTERCEPT(inotify_init)
1580 #define TSAN_MAYBE_INTERCEPT_INOTIFY_INIT
1584 TSAN_INTERCEPTOR(int, inotify_init1
, int flags
) {
1585 SCOPED_TSAN_INTERCEPTOR(inotify_init1
, flags
);
1586 int fd
= REAL(inotify_init1
)(flags
);
1588 FdInotifyCreate(thr
, pc
, fd
);
1591 #define TSAN_MAYBE_INTERCEPT_INOTIFY_INIT1 TSAN_INTERCEPT(inotify_init1)
1593 #define TSAN_MAYBE_INTERCEPT_INOTIFY_INIT1
1596 TSAN_INTERCEPTOR(int, socket
, int domain
, int type
, int protocol
) {
1597 SCOPED_TSAN_INTERCEPTOR(socket
, domain
, type
, protocol
);
1598 int fd
= REAL(socket
)(domain
, type
, protocol
);
1600 FdSocketCreate(thr
, pc
, fd
);
1604 TSAN_INTERCEPTOR(int, socketpair
, int domain
, int type
, int protocol
, int *fd
) {
1605 SCOPED_TSAN_INTERCEPTOR(socketpair
, domain
, type
, protocol
, fd
);
1606 int res
= REAL(socketpair
)(domain
, type
, protocol
, fd
);
1607 if (res
== 0 && fd
[0] >= 0 && fd
[1] >= 0)
1608 FdPipeCreate(thr
, pc
, fd
[0], fd
[1]);
1612 TSAN_INTERCEPTOR(int, connect
, int fd
, void *addr
, unsigned addrlen
) {
1613 SCOPED_TSAN_INTERCEPTOR(connect
, fd
, addr
, addrlen
);
1614 FdSocketConnecting(thr
, pc
, fd
);
1615 int res
= REAL(connect
)(fd
, addr
, addrlen
);
1616 if (res
== 0 && fd
>= 0)
1617 FdSocketConnect(thr
, pc
, fd
);
1621 TSAN_INTERCEPTOR(int, bind
, int fd
, void *addr
, unsigned addrlen
) {
1622 SCOPED_TSAN_INTERCEPTOR(bind
, fd
, addr
, addrlen
);
1623 int res
= REAL(bind
)(fd
, addr
, addrlen
);
1624 if (fd
> 0 && res
== 0)
1625 FdAccess(thr
, pc
, fd
);
1629 TSAN_INTERCEPTOR(int, listen
, int fd
, int backlog
) {
1630 SCOPED_TSAN_INTERCEPTOR(listen
, fd
, backlog
);
1631 int res
= REAL(listen
)(fd
, backlog
);
1632 if (fd
> 0 && res
== 0)
1633 FdAccess(thr
, pc
, fd
);
1637 TSAN_INTERCEPTOR(int, close
, int fd
) {
1638 SCOPED_TSAN_INTERCEPTOR(close
, fd
);
1640 FdClose(thr
, pc
, fd
);
1641 return REAL(close
)(fd
);
1645 TSAN_INTERCEPTOR(int, __close
, int fd
) {
1646 SCOPED_TSAN_INTERCEPTOR(__close
, fd
);
1648 FdClose(thr
, pc
, fd
);
1649 return REAL(__close
)(fd
);
1651 #define TSAN_MAYBE_INTERCEPT___CLOSE TSAN_INTERCEPT(__close)
1653 #define TSAN_MAYBE_INTERCEPT___CLOSE
1657 #if SANITIZER_LINUX && !SANITIZER_ANDROID
1658 TSAN_INTERCEPTOR(void, __res_iclose
, void *state
, bool free_addr
) {
1659 SCOPED_TSAN_INTERCEPTOR(__res_iclose
, state
, free_addr
);
1661 int cnt
= ExtractResolvFDs(state
, fds
, ARRAY_SIZE(fds
));
1662 for (int i
= 0; i
< cnt
; i
++) {
1664 FdClose(thr
, pc
, fds
[i
]);
1666 REAL(__res_iclose
)(state
, free_addr
);
1668 #define TSAN_MAYBE_INTERCEPT___RES_ICLOSE TSAN_INTERCEPT(__res_iclose)
1670 #define TSAN_MAYBE_INTERCEPT___RES_ICLOSE
1673 TSAN_INTERCEPTOR(int, pipe
, int *pipefd
) {
1674 SCOPED_TSAN_INTERCEPTOR(pipe
, pipefd
);
1675 int res
= REAL(pipe
)(pipefd
);
1676 if (res
== 0 && pipefd
[0] >= 0 && pipefd
[1] >= 0)
1677 FdPipeCreate(thr
, pc
, pipefd
[0], pipefd
[1]);
1682 TSAN_INTERCEPTOR(int, pipe2
, int *pipefd
, int flags
) {
1683 SCOPED_TSAN_INTERCEPTOR(pipe2
, pipefd
, flags
);
1684 int res
= REAL(pipe2
)(pipefd
, flags
);
1685 if (res
== 0 && pipefd
[0] >= 0 && pipefd
[1] >= 0)
1686 FdPipeCreate(thr
, pc
, pipefd
[0], pipefd
[1]);
1691 TSAN_INTERCEPTOR(int, unlink
, char *path
) {
1692 SCOPED_TSAN_INTERCEPTOR(unlink
, path
);
1693 Release(thr
, pc
, File2addr(path
));
1694 int res
= REAL(unlink
)(path
);
1698 TSAN_INTERCEPTOR(void*, tmpfile
, int fake
) {
1699 SCOPED_TSAN_INTERCEPTOR(tmpfile
, fake
);
1700 void *res
= REAL(tmpfile
)(fake
);
1702 int fd
= fileno_unlocked(res
);
1704 FdFileCreate(thr
, pc
, fd
);
1710 TSAN_INTERCEPTOR(void*, tmpfile64
, int fake
) {
1711 SCOPED_TSAN_INTERCEPTOR(tmpfile64
, fake
);
1712 void *res
= REAL(tmpfile64
)(fake
);
1714 int fd
= fileno_unlocked(res
);
1716 FdFileCreate(thr
, pc
, fd
);
1720 #define TSAN_MAYBE_INTERCEPT_TMPFILE64 TSAN_INTERCEPT(tmpfile64)
1722 #define TSAN_MAYBE_INTERCEPT_TMPFILE64
1725 static void FlushStreams() {
1726 // Flushing all the streams here may freeze the process if a child thread is
1727 // performing file stream operations at the same time.
1728 REAL(fflush
)(stdout
);
1729 REAL(fflush
)(stderr
);
1732 TSAN_INTERCEPTOR(void, abort
, int fake
) {
1733 SCOPED_TSAN_INTERCEPTOR(abort
, fake
);
1738 TSAN_INTERCEPTOR(int, rmdir
, char *path
) {
1739 SCOPED_TSAN_INTERCEPTOR(rmdir
, path
);
1740 Release(thr
, pc
, Dir2addr(path
));
1741 int res
= REAL(rmdir
)(path
);
1745 TSAN_INTERCEPTOR(int, closedir
, void *dirp
) {
1746 SCOPED_TSAN_INTERCEPTOR(closedir
, dirp
);
1748 int fd
= dirfd(dirp
);
1749 FdClose(thr
, pc
, fd
);
1751 return REAL(closedir
)(dirp
);
1755 TSAN_INTERCEPTOR(int, epoll_create
, int size
) {
1756 SCOPED_TSAN_INTERCEPTOR(epoll_create
, size
);
1757 int fd
= REAL(epoll_create
)(size
);
1759 FdPollCreate(thr
, pc
, fd
);
1763 TSAN_INTERCEPTOR(int, epoll_create1
, int flags
) {
1764 SCOPED_TSAN_INTERCEPTOR(epoll_create1
, flags
);
1765 int fd
= REAL(epoll_create1
)(flags
);
1767 FdPollCreate(thr
, pc
, fd
);
1771 TSAN_INTERCEPTOR(int, epoll_ctl
, int epfd
, int op
, int fd
, void *ev
) {
1772 SCOPED_TSAN_INTERCEPTOR(epoll_ctl
, epfd
, op
, fd
, ev
);
1774 FdAccess(thr
, pc
, epfd
);
1775 if (epfd
>= 0 && fd
>= 0)
1776 FdAccess(thr
, pc
, fd
);
1777 if (op
== EPOLL_CTL_ADD
&& epfd
>= 0)
1778 FdRelease(thr
, pc
, epfd
);
1779 int res
= REAL(epoll_ctl
)(epfd
, op
, fd
, ev
);
1783 TSAN_INTERCEPTOR(int, epoll_wait
, int epfd
, void *ev
, int cnt
, int timeout
) {
1784 SCOPED_TSAN_INTERCEPTOR(epoll_wait
, epfd
, ev
, cnt
, timeout
);
1786 FdAccess(thr
, pc
, epfd
);
1787 int res
= BLOCK_REAL(epoll_wait
)(epfd
, ev
, cnt
, timeout
);
1788 if (res
> 0 && epfd
>= 0)
1789 FdAcquire(thr
, pc
, epfd
);
1793 TSAN_INTERCEPTOR(int, epoll_pwait
, int epfd
, void *ev
, int cnt
, int timeout
,
1795 SCOPED_TSAN_INTERCEPTOR(epoll_pwait
, epfd
, ev
, cnt
, timeout
, sigmask
);
1797 FdAccess(thr
, pc
, epfd
);
1798 int res
= BLOCK_REAL(epoll_pwait
)(epfd
, ev
, cnt
, timeout
, sigmask
);
1799 if (res
> 0 && epfd
>= 0)
1800 FdAcquire(thr
, pc
, epfd
);
1804 #define TSAN_MAYBE_INTERCEPT_EPOLL \
1805 TSAN_INTERCEPT(epoll_create); \
1806 TSAN_INTERCEPT(epoll_create1); \
1807 TSAN_INTERCEPT(epoll_ctl); \
1808 TSAN_INTERCEPT(epoll_wait); \
1809 TSAN_INTERCEPT(epoll_pwait)
1811 #define TSAN_MAYBE_INTERCEPT_EPOLL
1814 // The following functions are intercepted merely to process pending signals.
1815 // If program blocks signal X, we must deliver the signal before the function
1816 // returns. Similarly, if program unblocks a signal (or returns from sigsuspend)
1817 // it's better to deliver the signal straight away.
1818 TSAN_INTERCEPTOR(int, sigsuspend
, const __sanitizer_sigset_t
*mask
) {
1819 SCOPED_TSAN_INTERCEPTOR(sigsuspend
, mask
);
1820 return REAL(sigsuspend
)(mask
);
1823 TSAN_INTERCEPTOR(int, sigblock
, int mask
) {
1824 SCOPED_TSAN_INTERCEPTOR(sigblock
, mask
);
1825 return REAL(sigblock
)(mask
);
1828 TSAN_INTERCEPTOR(int, sigsetmask
, int mask
) {
1829 SCOPED_TSAN_INTERCEPTOR(sigsetmask
, mask
);
1830 return REAL(sigsetmask
)(mask
);
1833 TSAN_INTERCEPTOR(int, pthread_sigmask
, int how
, const __sanitizer_sigset_t
*set
,
1834 __sanitizer_sigset_t
*oldset
) {
1835 SCOPED_TSAN_INTERCEPTOR(pthread_sigmask
, how
, set
, oldset
);
1836 return REAL(pthread_sigmask
)(how
, set
, oldset
);
1841 static void CallUserSignalHandler(ThreadState
*thr
, bool sync
, bool acquire
,
1842 bool sigact
, int sig
,
1843 __sanitizer_siginfo
*info
, void *uctx
) {
1844 __sanitizer_sigaction
*sigactions
= interceptor_ctx()->sigactions
;
1846 Acquire(thr
, 0, (uptr
)&sigactions
[sig
]);
1847 // Signals are generally asynchronous, so if we receive a signals when
1848 // ignores are enabled we should disable ignores. This is critical for sync
1849 // and interceptors, because otherwise we can miss syncronization and report
1851 int ignore_reads_and_writes
= thr
->ignore_reads_and_writes
;
1852 int ignore_interceptors
= thr
->ignore_interceptors
;
1853 int ignore_sync
= thr
->ignore_sync
;
1854 if (!ctx
->after_multithreaded_fork
) {
1855 thr
->ignore_reads_and_writes
= 0;
1856 thr
->fast_state
.ClearIgnoreBit();
1857 thr
->ignore_interceptors
= 0;
1858 thr
->ignore_sync
= 0;
1860 // Ensure that the handler does not spoil errno.
1861 const int saved_errno
= errno
;
1863 // This code races with sigaction. Be careful to not read sa_sigaction twice.
1864 // Also need to remember pc for reporting before the call,
1865 // because the handler can reset it.
1867 sigact
? (uptr
)sigactions
[sig
].sigaction
: (uptr
)sigactions
[sig
].handler
;
1868 if (pc
!= sig_dfl
&& pc
!= sig_ign
) {
1870 ((__sanitizer_sigactionhandler_ptr
)pc
)(sig
, info
, uctx
);
1872 ((__sanitizer_sighandler_ptr
)pc
)(sig
);
1874 if (!ctx
->after_multithreaded_fork
) {
1875 thr
->ignore_reads_and_writes
= ignore_reads_and_writes
;
1876 if (ignore_reads_and_writes
)
1877 thr
->fast_state
.SetIgnoreBit();
1878 thr
->ignore_interceptors
= ignore_interceptors
;
1879 thr
->ignore_sync
= ignore_sync
;
1881 // We do not detect errno spoiling for SIGTERM,
1882 // because some SIGTERM handlers do spoil errno but reraise SIGTERM,
1883 // tsan reports false positive in such case.
1884 // It's difficult to properly detect this situation (reraise),
1885 // because in async signal processing case (when handler is called directly
1886 // from rtl_generic_sighandler) we have not yet received the reraised
1887 // signal; and it looks too fragile to intercept all ways to reraise a signal.
1888 if (flags()->report_bugs
&& !sync
&& sig
!= SIGTERM
&& errno
!= 99) {
1889 VarSizeStackTrace stack
;
1890 // StackTrace::GetNestInstructionPc(pc) is used because return address is
1891 // expected, OutputReport() will undo this.
1892 ObtainCurrentStack(thr
, StackTrace::GetNextInstructionPc(pc
), &stack
);
1893 ThreadRegistryLock
l(ctx
->thread_registry
);
1894 ScopedReport
rep(ReportTypeErrnoInSignal
);
1895 if (!IsFiredSuppression(ctx
, ReportTypeErrnoInSignal
, stack
)) {
1896 rep
.AddStack(stack
, true);
1897 OutputReport(thr
, rep
);
1900 errno
= saved_errno
;
1903 void ProcessPendingSignals(ThreadState
*thr
) {
1904 ThreadSignalContext
*sctx
= SigCtx(thr
);
1906 atomic_load(&sctx
->have_pending_signals
, memory_order_relaxed
) == 0)
1908 atomic_store(&sctx
->have_pending_signals
, 0, memory_order_relaxed
);
1909 atomic_fetch_add(&thr
->in_signal_handler
, 1, memory_order_relaxed
);
1910 internal_sigfillset(&sctx
->emptyset
);
1911 int res
= REAL(pthread_sigmask
)(SIG_SETMASK
, &sctx
->emptyset
, &sctx
->oldset
);
1913 for (int sig
= 0; sig
< kSigCount
; sig
++) {
1914 SignalDesc
*signal
= &sctx
->pending_signals
[sig
];
1915 if (signal
->armed
) {
1916 signal
->armed
= false;
1917 CallUserSignalHandler(thr
, false, true, signal
->sigaction
, sig
,
1918 &signal
->siginfo
, &signal
->ctx
);
1921 res
= REAL(pthread_sigmask
)(SIG_SETMASK
, &sctx
->oldset
, 0);
1923 atomic_fetch_add(&thr
->in_signal_handler
, -1, memory_order_relaxed
);
1926 } // namespace __tsan
1928 static bool is_sync_signal(ThreadSignalContext
*sctx
, int sig
) {
1929 return sig
== SIGSEGV
|| sig
== SIGBUS
|| sig
== SIGILL
||
1930 sig
== SIGABRT
|| sig
== SIGFPE
|| sig
== SIGPIPE
|| sig
== SIGSYS
||
1931 // If we are sending signal to ourselves, we must process it now.
1932 (sctx
&& sig
== sctx
->int_signal_send
);
1935 void ALWAYS_INLINE
rtl_generic_sighandler(bool sigact
, int sig
,
1936 __sanitizer_siginfo
*info
,
1938 ThreadState
*thr
= cur_thread();
1939 ThreadSignalContext
*sctx
= SigCtx(thr
);
1940 if (sig
< 0 || sig
>= kSigCount
) {
1941 VPrintf(1, "ThreadSanitizer: ignoring signal %d\n", sig
);
1944 // Don't mess with synchronous signals.
1945 const bool sync
= is_sync_signal(sctx
, sig
);
1947 // If we are in blocking function, we can safely process it now
1948 // (but check if we are in a recursive interceptor,
1949 // i.e. pthread_join()->munmap()).
1950 (sctx
&& atomic_load(&sctx
->in_blocking_func
, memory_order_relaxed
))) {
1951 atomic_fetch_add(&thr
->in_signal_handler
, 1, memory_order_relaxed
);
1952 if (sctx
&& atomic_load(&sctx
->in_blocking_func
, memory_order_relaxed
)) {
1953 atomic_store(&sctx
->in_blocking_func
, 0, memory_order_relaxed
);
1954 CallUserSignalHandler(thr
, sync
, true, sigact
, sig
, info
, ctx
);
1955 atomic_store(&sctx
->in_blocking_func
, 1, memory_order_relaxed
);
1957 // Be very conservative with when we do acquire in this case.
1958 // It's unsafe to do acquire in async handlers, because ThreadState
1959 // can be in inconsistent state.
1960 // SIGSYS looks relatively safe -- it's synchronous and can actually
1961 // need some global state.
1962 bool acq
= (sig
== SIGSYS
);
1963 CallUserSignalHandler(thr
, sync
, acq
, sigact
, sig
, info
, ctx
);
1965 atomic_fetch_add(&thr
->in_signal_handler
, -1, memory_order_relaxed
);
1971 SignalDesc
*signal
= &sctx
->pending_signals
[sig
];
1972 if (signal
->armed
== false) {
1973 signal
->armed
= true;
1974 signal
->sigaction
= sigact
;
1976 internal_memcpy(&signal
->siginfo
, info
, sizeof(*info
));
1978 internal_memcpy(&signal
->ctx
, ctx
, sizeof(signal
->ctx
));
1979 atomic_store(&sctx
->have_pending_signals
, 1, memory_order_relaxed
);
1983 static void rtl_sighandler(int sig
) {
1984 rtl_generic_sighandler(false, sig
, 0, 0);
1987 static void rtl_sigaction(int sig
, __sanitizer_siginfo
*info
, void *ctx
) {
1988 rtl_generic_sighandler(true, sig
, info
, ctx
);
1991 TSAN_INTERCEPTOR(int, raise
, int sig
) {
1992 SCOPED_TSAN_INTERCEPTOR(raise
, sig
);
1993 ThreadSignalContext
*sctx
= SigCtx(thr
);
1995 int prev
= sctx
->int_signal_send
;
1996 sctx
->int_signal_send
= sig
;
1997 int res
= REAL(raise
)(sig
);
1998 CHECK_EQ(sctx
->int_signal_send
, sig
);
1999 sctx
->int_signal_send
= prev
;
2003 TSAN_INTERCEPTOR(int, kill
, int pid
, int sig
) {
2004 SCOPED_TSAN_INTERCEPTOR(kill
, pid
, sig
);
2005 ThreadSignalContext
*sctx
= SigCtx(thr
);
2007 int prev
= sctx
->int_signal_send
;
2008 if (pid
== (int)internal_getpid()) {
2009 sctx
->int_signal_send
= sig
;
2011 int res
= REAL(kill
)(pid
, sig
);
2012 if (pid
== (int)internal_getpid()) {
2013 CHECK_EQ(sctx
->int_signal_send
, sig
);
2014 sctx
->int_signal_send
= prev
;
2019 TSAN_INTERCEPTOR(int, pthread_kill
, void *tid
, int sig
) {
2020 SCOPED_TSAN_INTERCEPTOR(pthread_kill
, tid
, sig
);
2021 ThreadSignalContext
*sctx
= SigCtx(thr
);
2023 int prev
= sctx
->int_signal_send
;
2024 if (tid
== pthread_self()) {
2025 sctx
->int_signal_send
= sig
;
2027 int res
= REAL(pthread_kill
)(tid
, sig
);
2028 if (tid
== pthread_self()) {
2029 CHECK_EQ(sctx
->int_signal_send
, sig
);
2030 sctx
->int_signal_send
= prev
;
2035 TSAN_INTERCEPTOR(int, gettimeofday
, void *tv
, void *tz
) {
2036 SCOPED_TSAN_INTERCEPTOR(gettimeofday
, tv
, tz
);
2037 // It's intercepted merely to process pending signals.
2038 return REAL(gettimeofday
)(tv
, tz
);
2041 TSAN_INTERCEPTOR(int, getaddrinfo
, void *node
, void *service
,
2042 void *hints
, void *rv
) {
2043 SCOPED_TSAN_INTERCEPTOR(getaddrinfo
, node
, service
, hints
, rv
);
2044 // We miss atomic synchronization in getaddrinfo,
2045 // and can report false race between malloc and free
2046 // inside of getaddrinfo. So ignore memory accesses.
2047 ThreadIgnoreBegin(thr
, pc
);
2048 int res
= REAL(getaddrinfo
)(node
, service
, hints
, rv
);
2049 ThreadIgnoreEnd(thr
, pc
);
2053 TSAN_INTERCEPTOR(int, fork
, int fake
) {
2054 if (UNLIKELY(cur_thread()->in_symbolizer
))
2055 return REAL(fork
)(fake
);
2056 SCOPED_INTERCEPTOR_RAW(fork
, fake
);
2057 ForkBefore(thr
, pc
);
2060 // On OS X, REAL(fork) can call intercepted functions (OSSpinLockLock), and
2061 // we'll assert in CheckNoLocks() unless we ignore interceptors.
2062 ScopedIgnoreInterceptors ignore
;
2063 pid
= REAL(fork
)(fake
);
2067 ForkChildAfter(thr
, pc
);
2069 } else if (pid
> 0) {
2071 ForkParentAfter(thr
, pc
);
2074 ForkParentAfter(thr
, pc
);
2079 TSAN_INTERCEPTOR(int, vfork
, int fake
) {
2080 // Some programs (e.g. openjdk) call close for all file descriptors
2081 // in the child process. Under tsan it leads to false positives, because
2082 // address space is shared, so the parent process also thinks that
2083 // the descriptors are closed (while they are actually not).
2084 // This leads to false positives due to missed synchronization.
2085 // Strictly saying this is undefined behavior, because vfork child is not
2086 // allowed to call any functions other than exec/exit. But this is what
2087 // openjdk does, so we want to handle it.
2088 // We could disable interceptors in the child process. But it's not possible
2089 // to simply intercept and wrap vfork, because vfork child is not allowed
2090 // to return from the function that calls vfork, and that's exactly what
2091 // we would do. So this would require some assembly trickery as well.
2092 // Instead we simply turn vfork into fork.
2093 return WRAP(fork
)(fake
);
2096 #if !SANITIZER_MAC && !SANITIZER_ANDROID
2097 typedef int (*dl_iterate_phdr_cb_t
)(__sanitizer_dl_phdr_info
*info
, SIZE_T size
,
2099 struct dl_iterate_phdr_data
{
2102 dl_iterate_phdr_cb_t cb
;
2106 static bool IsAppNotRodata(uptr addr
) {
2107 return IsAppMem(addr
) && *(u64
*)MemToShadow(addr
) != kShadowRodata
;
2110 static int dl_iterate_phdr_cb(__sanitizer_dl_phdr_info
*info
, SIZE_T size
,
2112 dl_iterate_phdr_data
*cbdata
= (dl_iterate_phdr_data
*)data
;
2113 // dlopen/dlclose allocate/free dynamic-linker-internal memory, which is later
2114 // accessible in dl_iterate_phdr callback. But we don't see synchronization
2115 // inside of dynamic linker, so we "unpoison" it here in order to not
2116 // produce false reports. Ignoring malloc/free in dlopen/dlclose is not enough
2117 // because some libc functions call __libc_dlopen.
2118 if (info
&& IsAppNotRodata((uptr
)info
->dlpi_name
))
2119 MemoryResetRange(cbdata
->thr
, cbdata
->pc
, (uptr
)info
->dlpi_name
,
2120 internal_strlen(info
->dlpi_name
));
2121 int res
= cbdata
->cb(info
, size
, cbdata
->data
);
2122 // Perform the check one more time in case info->dlpi_name was overwritten
2123 // by user callback.
2124 if (info
&& IsAppNotRodata((uptr
)info
->dlpi_name
))
2125 MemoryResetRange(cbdata
->thr
, cbdata
->pc
, (uptr
)info
->dlpi_name
,
2126 internal_strlen(info
->dlpi_name
));
2130 TSAN_INTERCEPTOR(int, dl_iterate_phdr
, dl_iterate_phdr_cb_t cb
, void *data
) {
2131 SCOPED_TSAN_INTERCEPTOR(dl_iterate_phdr
, cb
, data
);
2132 dl_iterate_phdr_data cbdata
;
2137 int res
= REAL(dl_iterate_phdr
)(dl_iterate_phdr_cb
, &cbdata
);
2142 static int OnExit(ThreadState
*thr
) {
2143 int status
= Finalize(thr
);
2148 struct TsanInterceptorContext
{
2150 const uptr caller_pc
;
2155 static void HandleRecvmsg(ThreadState
*thr
, uptr pc
,
2156 __sanitizer_msghdr
*msg
) {
2158 int cnt
= ExtractRecvmsgFDs(msg
, fds
, ARRAY_SIZE(fds
));
2159 for (int i
= 0; i
< cnt
; i
++)
2160 FdEventCreate(thr
, pc
, fds
[i
]);
2164 #include "sanitizer_common/sanitizer_platform_interceptors.h"
2165 // Causes interceptor recursion (getaddrinfo() and fopen())
2166 #undef SANITIZER_INTERCEPT_GETADDRINFO
2167 // There interceptors do not seem to be strictly necessary for tsan.
2168 // But we see cases where the interceptors consume 70% of execution time.
2169 // Memory blocks passed to fgetgrent_r are "written to" by tsan several times.
2170 // First, there is some recursion (getgrnam_r calls fgetgrent_r), and each
2171 // function "writes to" the buffer. Then, the same memory is "written to"
2172 // twice, first as buf and then as pwbufp (both of them refer to the same
2174 #undef SANITIZER_INTERCEPT_GETPWENT
2175 #undef SANITIZER_INTERCEPT_GETPWENT_R
2176 #undef SANITIZER_INTERCEPT_FGETPWENT
2177 #undef SANITIZER_INTERCEPT_GETPWNAM_AND_FRIENDS
2178 #undef SANITIZER_INTERCEPT_GETPWNAM_R_AND_FRIENDS
2179 // We define our own.
2180 #if SANITIZER_INTERCEPT_TLS_GET_ADDR
2181 #define NEED_TLS_GET_ADDR
2183 #undef SANITIZER_INTERCEPT_TLS_GET_ADDR
2185 #define COMMON_INTERCEPT_FUNCTION(name) INTERCEPT_FUNCTION(name)
2186 #define COMMON_INTERCEPT_FUNCTION_VER(name, ver) \
2187 INTERCEPT_FUNCTION_VER(name, ver)
2189 #define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \
2190 MemoryAccessRange(((TsanInterceptorContext *)ctx)->thr, \
2191 ((TsanInterceptorContext *)ctx)->pc, (uptr)ptr, size, \
2194 #define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) \
2195 MemoryAccessRange(((TsanInterceptorContext *) ctx)->thr, \
2196 ((TsanInterceptorContext *) ctx)->pc, (uptr) ptr, size, \
2199 #define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \
2200 SCOPED_TSAN_INTERCEPTOR(func, __VA_ARGS__); \
2201 TsanInterceptorContext _ctx = {thr, caller_pc, pc}; \
2202 ctx = (void *)&_ctx; \
2205 #define COMMON_INTERCEPTOR_ENTER_NOIGNORE(ctx, func, ...) \
2206 SCOPED_INTERCEPTOR_RAW(func, __VA_ARGS__); \
2207 TsanInterceptorContext _ctx = {thr, caller_pc, pc}; \
2208 ctx = (void *)&_ctx; \
2211 #define COMMON_INTERCEPTOR_FILE_OPEN(ctx, file, path) \
2212 Acquire(thr, pc, File2addr(path)); \
2214 int fd = fileno_unlocked(file); \
2215 if (fd >= 0) FdFileCreate(thr, pc, fd); \
2218 #define COMMON_INTERCEPTOR_FILE_CLOSE(ctx, file) \
2220 int fd = fileno_unlocked(file); \
2221 if (fd >= 0) FdClose(thr, pc, fd); \
2224 #define COMMON_INTERCEPTOR_LIBRARY_LOADED(filename, handle) \
2225 libignore()->OnLibraryLoaded(filename)
2227 #define COMMON_INTERCEPTOR_LIBRARY_UNLOADED() \
2228 libignore()->OnLibraryUnloaded()
2230 #define COMMON_INTERCEPTOR_ACQUIRE(ctx, u) \
2231 Acquire(((TsanInterceptorContext *) ctx)->thr, pc, u)
2233 #define COMMON_INTERCEPTOR_RELEASE(ctx, u) \
2234 Release(((TsanInterceptorContext *) ctx)->thr, pc, u)
2236 #define COMMON_INTERCEPTOR_DIR_ACQUIRE(ctx, path) \
2237 Acquire(((TsanInterceptorContext *) ctx)->thr, pc, Dir2addr(path))
2239 #define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \
2240 FdAcquire(((TsanInterceptorContext *) ctx)->thr, pc, fd)
2242 #define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) \
2243 FdRelease(((TsanInterceptorContext *) ctx)->thr, pc, fd)
2245 #define COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd) \
2246 FdAccess(((TsanInterceptorContext *) ctx)->thr, pc, fd)
2248 #define COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, newfd) \
2249 FdSocketAccept(((TsanInterceptorContext *) ctx)->thr, pc, fd, newfd)
2251 #define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) \
2252 ThreadSetName(((TsanInterceptorContext *) ctx)->thr, name)
2254 #define COMMON_INTERCEPTOR_SET_PTHREAD_NAME(ctx, thread, name) \
2255 __tsan::ctx->thread_registry->SetThreadNameByUserId(thread, name)
2257 #define COMMON_INTERCEPTOR_BLOCK_REAL(name) BLOCK_REAL(name)
2259 #define COMMON_INTERCEPTOR_ON_EXIT(ctx) \
2260 OnExit(((TsanInterceptorContext *) ctx)->thr)
2262 #define COMMON_INTERCEPTOR_MUTEX_PRE_LOCK(ctx, m) \
2263 MutexPreLock(((TsanInterceptorContext *)ctx)->thr, \
2264 ((TsanInterceptorContext *)ctx)->pc, (uptr)m)
2266 #define COMMON_INTERCEPTOR_MUTEX_POST_LOCK(ctx, m) \
2267 MutexPostLock(((TsanInterceptorContext *)ctx)->thr, \
2268 ((TsanInterceptorContext *)ctx)->pc, (uptr)m)
2270 #define COMMON_INTERCEPTOR_MUTEX_UNLOCK(ctx, m) \
2271 MutexUnlock(((TsanInterceptorContext *)ctx)->thr, \
2272 ((TsanInterceptorContext *)ctx)->pc, (uptr)m)
2274 #define COMMON_INTERCEPTOR_MUTEX_REPAIR(ctx, m) \
2275 MutexRepair(((TsanInterceptorContext *)ctx)->thr, \
2276 ((TsanInterceptorContext *)ctx)->pc, (uptr)m)
2278 #define COMMON_INTERCEPTOR_MUTEX_INVALID(ctx, m) \
2279 MutexInvalidAccess(((TsanInterceptorContext *)ctx)->thr, \
2280 ((TsanInterceptorContext *)ctx)->pc, (uptr)m)
2282 #define COMMON_INTERCEPTOR_MMAP_IMPL(ctx, mmap, addr, sz, prot, flags, fd, \
2285 return mmap_interceptor(thr, pc, REAL(mmap), addr, sz, prot, flags, fd, \
2290 #define COMMON_INTERCEPTOR_HANDLE_RECVMSG(ctx, msg) \
2291 HandleRecvmsg(((TsanInterceptorContext *)ctx)->thr, \
2292 ((TsanInterceptorContext *)ctx)->pc, msg)
2295 #define COMMON_INTERCEPTOR_GET_TLS_RANGE(begin, end) \
2296 if (TsanThread *t = GetCurrentThread()) { \
2297 *begin = t->tls_begin(); \
2298 *end = t->tls_end(); \
2300 *begin = *end = 0; \
2303 #define COMMON_INTERCEPTOR_USER_CALLBACK_START() \
2304 SCOPED_TSAN_INTERCEPTOR_USER_CALLBACK_START()
2306 #define COMMON_INTERCEPTOR_USER_CALLBACK_END() \
2307 SCOPED_TSAN_INTERCEPTOR_USER_CALLBACK_END()
2309 #include "sanitizer_common/sanitizer_common_interceptors.inc"
2311 static int sigaction_impl(int sig
, const __sanitizer_sigaction
*act
,
2312 __sanitizer_sigaction
*old
);
2313 static __sanitizer_sighandler_ptr
signal_impl(int sig
,
2314 __sanitizer_sighandler_ptr h
);
2316 #define SIGNAL_INTERCEPTOR_SIGACTION_IMPL(signo, act, oldact) \
2317 { return sigaction_impl(signo, act, oldact); }
2319 #define SIGNAL_INTERCEPTOR_SIGNAL_IMPL(func, signo, handler) \
2320 { return (uptr)signal_impl(signo, (__sanitizer_sighandler_ptr)handler); }
2322 #include "sanitizer_common/sanitizer_signal_interceptors.inc"
2324 int sigaction_impl(int sig
, const __sanitizer_sigaction
*act
,
2325 __sanitizer_sigaction
*old
) {
2326 // Note: if we call REAL(sigaction) directly for any reason without proxying
2327 // the signal handler through rtl_sigaction, very bad things will happen.
2328 // The handler will run synchronously and corrupt tsan per-thread state.
2329 SCOPED_INTERCEPTOR_RAW(sigaction
, sig
, act
, old
);
2330 __sanitizer_sigaction
*sigactions
= interceptor_ctx()->sigactions
;
2331 __sanitizer_sigaction old_stored
;
2332 if (old
) internal_memcpy(&old_stored
, &sigactions
[sig
], sizeof(old_stored
));
2333 __sanitizer_sigaction newact
;
2335 // Copy act into sigactions[sig].
2336 // Can't use struct copy, because compiler can emit call to memcpy.
2337 // Can't use internal_memcpy, because it copies byte-by-byte,
2338 // and signal handler reads the handler concurrently. It it can read
2339 // some bytes from old value and some bytes from new value.
2340 // Use volatile to prevent insertion of memcpy.
2341 sigactions
[sig
].handler
=
2342 *(volatile __sanitizer_sighandler_ptr
const *)&act
->handler
;
2343 sigactions
[sig
].sa_flags
= *(volatile int const *)&act
->sa_flags
;
2344 internal_memcpy(&sigactions
[sig
].sa_mask
, &act
->sa_mask
,
2345 sizeof(sigactions
[sig
].sa_mask
));
2346 #if !SANITIZER_FREEBSD && !SANITIZER_MAC && !SANITIZER_NETBSD
2347 sigactions
[sig
].sa_restorer
= act
->sa_restorer
;
2349 internal_memcpy(&newact
, act
, sizeof(newact
));
2350 internal_sigfillset(&newact
.sa_mask
);
2351 if ((uptr
)act
->handler
!= sig_ign
&& (uptr
)act
->handler
!= sig_dfl
) {
2352 if (newact
.sa_flags
& SA_SIGINFO
)
2353 newact
.sigaction
= rtl_sigaction
;
2355 newact
.handler
= rtl_sighandler
;
2357 ReleaseStore(thr
, pc
, (uptr
)&sigactions
[sig
]);
2360 int res
= REAL(sigaction
)(sig
, act
, old
);
2361 if (res
== 0 && old
) {
2362 uptr cb
= (uptr
)old
->sigaction
;
2363 if (cb
== (uptr
)rtl_sigaction
|| cb
== (uptr
)rtl_sighandler
) {
2364 internal_memcpy(old
, &old_stored
, sizeof(*old
));
2370 static __sanitizer_sighandler_ptr
signal_impl(int sig
,
2371 __sanitizer_sighandler_ptr h
) {
2372 __sanitizer_sigaction act
;
2374 internal_memset(&act
.sa_mask
, -1, sizeof(act
.sa_mask
));
2376 __sanitizer_sigaction old
;
2377 int res
= sigaction_symname(sig
, &act
, &old
);
2378 if (res
) return (__sanitizer_sighandler_ptr
)sig_err
;
2382 #define TSAN_SYSCALL() \
2383 ThreadState *thr = cur_thread(); \
2384 if (thr->ignore_interceptors) \
2386 ScopedSyscall scoped_syscall(thr) \
2389 struct ScopedSyscall
{
2392 explicit ScopedSyscall(ThreadState
*thr
)
2398 ProcessPendingSignals(thr
);
2402 #if !SANITIZER_FREEBSD && !SANITIZER_MAC
2403 static void syscall_access_range(uptr pc
, uptr p
, uptr s
, bool write
) {
2405 MemoryAccessRange(thr
, pc
, p
, s
, write
);
2408 static void syscall_acquire(uptr pc
, uptr addr
) {
2410 Acquire(thr
, pc
, addr
);
2411 DPrintf("syscall_acquire(%p)\n", addr
);
2414 static void syscall_release(uptr pc
, uptr addr
) {
2416 DPrintf("syscall_release(%p)\n", addr
);
2417 Release(thr
, pc
, addr
);
2420 static void syscall_fd_close(uptr pc
, int fd
) {
2422 FdClose(thr
, pc
, fd
);
2425 static USED
void syscall_fd_acquire(uptr pc
, int fd
) {
2427 FdAcquire(thr
, pc
, fd
);
2428 DPrintf("syscall_fd_acquire(%p)\n", fd
);
2431 static USED
void syscall_fd_release(uptr pc
, int fd
) {
2433 DPrintf("syscall_fd_release(%p)\n", fd
);
2434 FdRelease(thr
, pc
, fd
);
2437 static void syscall_pre_fork(uptr pc
) {
2439 ForkBefore(thr
, pc
);
2442 static void syscall_post_fork(uptr pc
, int pid
) {
2446 ForkChildAfter(thr
, pc
);
2448 } else if (pid
> 0) {
2450 ForkParentAfter(thr
, pc
);
2453 ForkParentAfter(thr
, pc
);
2458 #define COMMON_SYSCALL_PRE_READ_RANGE(p, s) \
2459 syscall_access_range(GET_CALLER_PC(), (uptr)(p), (uptr)(s), false)
2461 #define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s) \
2462 syscall_access_range(GET_CALLER_PC(), (uptr)(p), (uptr)(s), true)
2464 #define COMMON_SYSCALL_POST_READ_RANGE(p, s) \
2470 #define COMMON_SYSCALL_POST_WRITE_RANGE(p, s) \
2476 #define COMMON_SYSCALL_ACQUIRE(addr) \
2477 syscall_acquire(GET_CALLER_PC(), (uptr)(addr))
2479 #define COMMON_SYSCALL_RELEASE(addr) \
2480 syscall_release(GET_CALLER_PC(), (uptr)(addr))
2482 #define COMMON_SYSCALL_FD_CLOSE(fd) syscall_fd_close(GET_CALLER_PC(), fd)
2484 #define COMMON_SYSCALL_FD_ACQUIRE(fd) syscall_fd_acquire(GET_CALLER_PC(), fd)
2486 #define COMMON_SYSCALL_FD_RELEASE(fd) syscall_fd_release(GET_CALLER_PC(), fd)
2488 #define COMMON_SYSCALL_PRE_FORK() \
2489 syscall_pre_fork(GET_CALLER_PC())
2491 #define COMMON_SYSCALL_POST_FORK(res) \
2492 syscall_post_fork(GET_CALLER_PC(), res)
2494 #include "sanitizer_common/sanitizer_common_syscalls.inc"
2495 #include "sanitizer_common/sanitizer_syscalls_netbsd.inc"
2497 #ifdef NEED_TLS_GET_ADDR
2498 // Define own interceptor instead of sanitizer_common's for three reasons:
2499 // 1. It must not process pending signals.
2500 // Signal handlers may contain MOVDQA instruction (see below).
2501 // 2. It must be as simple as possible to not contain MOVDQA.
2502 // 3. Sanitizer_common version uses COMMON_INTERCEPTOR_INITIALIZE_RANGE which
2503 // is empty for tsan (meant only for msan).
2504 // Note: __tls_get_addr can be called with mis-aligned stack due to:
2505 // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58066
2506 // So the interceptor must work with mis-aligned stack, in particular, does not
2507 // execute MOVDQA with stack addresses.
2508 TSAN_INTERCEPTOR(void *, __tls_get_addr
, void *arg
) {
2509 void *res
= REAL(__tls_get_addr
)(arg
);
2510 ThreadState
*thr
= cur_thread();
2513 DTLS::DTV
*dtv
= DTLS_on_tls_get_addr(arg
, res
, thr
->tls_addr
,
2514 thr
->tls_addr
+ thr
->tls_size
);
2517 // New DTLS block has been allocated.
2518 MemoryResetRange(thr
, 0, dtv
->beg
, dtv
->size
);
2523 #if SANITIZER_NETBSD
2524 TSAN_INTERCEPTOR(void, _lwp_exit
) {
2525 SCOPED_TSAN_INTERCEPTOR(_lwp_exit
);
2526 DestroyThreadState();
2529 #define TSAN_MAYBE_INTERCEPT__LWP_EXIT TSAN_INTERCEPT(_lwp_exit)
2531 #define TSAN_MAYBE_INTERCEPT__LWP_EXIT
2534 #if SANITIZER_FREEBSD
2535 TSAN_INTERCEPTOR(void, thr_exit
, tid_t
*state
) {
2536 SCOPED_TSAN_INTERCEPTOR(thr_exit
, state
);
2537 DestroyThreadState();
2538 REAL(thr_exit(state
));
2540 #define TSAN_MAYBE_INTERCEPT_THR_EXIT TSAN_INTERCEPT(thr_exit)
2542 #define TSAN_MAYBE_INTERCEPT_THR_EXIT
2545 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, cond_init
, void *c
, void *a
)
2546 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, cond_signal
, void *c
)
2547 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, cond_broadcast
, void *c
)
2548 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, cond_wait
, void *c
, void *m
)
2549 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, cond_destroy
, void *c
)
2550 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, mutex_init
, void *m
, void *a
)
2551 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, mutex_destroy
, void *m
)
2552 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, mutex_trylock
, void *m
)
2553 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, rwlock_init
, void *m
, void *a
)
2554 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, rwlock_destroy
, void *m
)
2555 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, rwlock_rdlock
, void *m
)
2556 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, rwlock_tryrdlock
, void *m
)
2557 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, rwlock_wrlock
, void *m
)
2558 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, rwlock_trywrlock
, void *m
)
2559 TSAN_INTERCEPTOR_NETBSD_ALIAS(int, rwlock_unlock
, void *m
)
2560 TSAN_INTERCEPTOR_NETBSD_ALIAS_THR(int, once
, void *o
, void (*f
)())
2564 static void finalize(void *arg
) {
2565 ThreadState
*thr
= cur_thread();
2566 int status
= Finalize(thr
);
2567 // Make sure the output is not lost.
2573 #if !SANITIZER_MAC && !SANITIZER_ANDROID
2574 static void unreachable() {
2575 Report("FATAL: ThreadSanitizer: unreachable called\n");
2580 void InitializeInterceptors() {
2582 // We need to setup it early, because functions like dlsym() can call it.
2583 REAL(memset
) = internal_memset
;
2584 REAL(memcpy
) = internal_memcpy
;
2587 // Instruct libc malloc to consume less memory.
2589 mallopt(1, 0); // M_MXFAST
2590 mallopt(-3, 32*1024); // M_MMAP_THRESHOLD
2593 new(interceptor_ctx()) InterceptorContext();
2595 InitializeCommonInterceptors();
2596 InitializeSignalInterceptors();
2599 // We can not use TSAN_INTERCEPT to get setjmp addr,
2600 // because it does &setjmp and setjmp is not present in some versions of libc.
2601 using __interception::GetRealFunctionAddress
;
2602 GetRealFunctionAddress(TSAN_STRING_SETJMP
,
2603 (uptr
*)&REAL(setjmp_symname
), 0, 0);
2604 GetRealFunctionAddress("_setjmp", (uptr
*)&REAL(_setjmp
), 0, 0);
2605 GetRealFunctionAddress(TSAN_STRING_SIGSETJMP
,
2606 (uptr
*)&REAL(sigsetjmp_symname
), 0, 0);
2607 #if !SANITIZER_NETBSD
2608 GetRealFunctionAddress("__sigsetjmp", (uptr
*)&REAL(__sigsetjmp
), 0, 0);
2612 TSAN_INTERCEPT(longjmp_symname
);
2613 TSAN_INTERCEPT(siglongjmp_symname
);
2614 #if SANITIZER_NETBSD
2615 TSAN_INTERCEPT(_longjmp
);
2618 TSAN_INTERCEPT(malloc
);
2619 TSAN_INTERCEPT(__libc_memalign
);
2620 TSAN_INTERCEPT(calloc
);
2621 TSAN_INTERCEPT(realloc
);
2622 TSAN_INTERCEPT(free
);
2623 TSAN_INTERCEPT(cfree
);
2624 TSAN_INTERCEPT(munmap
);
2625 TSAN_MAYBE_INTERCEPT_MEMALIGN
;
2626 TSAN_INTERCEPT(valloc
);
2627 TSAN_MAYBE_INTERCEPT_PVALLOC
;
2628 TSAN_INTERCEPT(posix_memalign
);
2630 TSAN_INTERCEPT(strcpy
); // NOLINT
2631 TSAN_INTERCEPT(strncpy
);
2632 TSAN_INTERCEPT(strdup
);
2634 TSAN_INTERCEPT(pthread_create
);
2635 TSAN_INTERCEPT(pthread_join
);
2636 TSAN_INTERCEPT(pthread_detach
);
2638 TSAN_INTERCEPT_VER(pthread_cond_init
, PTHREAD_ABI_BASE
);
2639 TSAN_INTERCEPT_VER(pthread_cond_signal
, PTHREAD_ABI_BASE
);
2640 TSAN_INTERCEPT_VER(pthread_cond_broadcast
, PTHREAD_ABI_BASE
);
2641 TSAN_INTERCEPT_VER(pthread_cond_wait
, PTHREAD_ABI_BASE
);
2642 TSAN_INTERCEPT_VER(pthread_cond_timedwait
, PTHREAD_ABI_BASE
);
2643 TSAN_INTERCEPT_VER(pthread_cond_destroy
, PTHREAD_ABI_BASE
);
2645 TSAN_INTERCEPT(pthread_mutex_init
);
2646 TSAN_INTERCEPT(pthread_mutex_destroy
);
2647 TSAN_INTERCEPT(pthread_mutex_trylock
);
2648 TSAN_INTERCEPT(pthread_mutex_timedlock
);
2650 TSAN_INTERCEPT(pthread_spin_init
);
2651 TSAN_INTERCEPT(pthread_spin_destroy
);
2652 TSAN_INTERCEPT(pthread_spin_lock
);
2653 TSAN_INTERCEPT(pthread_spin_trylock
);
2654 TSAN_INTERCEPT(pthread_spin_unlock
);
2656 TSAN_INTERCEPT(pthread_rwlock_init
);
2657 TSAN_INTERCEPT(pthread_rwlock_destroy
);
2658 TSAN_INTERCEPT(pthread_rwlock_rdlock
);
2659 TSAN_INTERCEPT(pthread_rwlock_tryrdlock
);
2660 TSAN_INTERCEPT(pthread_rwlock_timedrdlock
);
2661 TSAN_INTERCEPT(pthread_rwlock_wrlock
);
2662 TSAN_INTERCEPT(pthread_rwlock_trywrlock
);
2663 TSAN_INTERCEPT(pthread_rwlock_timedwrlock
);
2664 TSAN_INTERCEPT(pthread_rwlock_unlock
);
2666 TSAN_INTERCEPT(pthread_barrier_init
);
2667 TSAN_INTERCEPT(pthread_barrier_destroy
);
2668 TSAN_INTERCEPT(pthread_barrier_wait
);
2670 TSAN_INTERCEPT(pthread_once
);
2672 TSAN_INTERCEPT(fstat
);
2673 TSAN_MAYBE_INTERCEPT___FXSTAT
;
2674 TSAN_MAYBE_INTERCEPT_FSTAT64
;
2675 TSAN_MAYBE_INTERCEPT___FXSTAT64
;
2676 TSAN_INTERCEPT(open
);
2677 TSAN_MAYBE_INTERCEPT_OPEN64
;
2678 TSAN_INTERCEPT(creat
);
2679 TSAN_MAYBE_INTERCEPT_CREAT64
;
2680 TSAN_INTERCEPT(dup
);
2681 TSAN_INTERCEPT(dup2
);
2682 TSAN_INTERCEPT(dup3
);
2683 TSAN_MAYBE_INTERCEPT_EVENTFD
;
2684 TSAN_MAYBE_INTERCEPT_SIGNALFD
;
2685 TSAN_MAYBE_INTERCEPT_INOTIFY_INIT
;
2686 TSAN_MAYBE_INTERCEPT_INOTIFY_INIT1
;
2687 TSAN_INTERCEPT(socket
);
2688 TSAN_INTERCEPT(socketpair
);
2689 TSAN_INTERCEPT(connect
);
2690 TSAN_INTERCEPT(bind
);
2691 TSAN_INTERCEPT(listen
);
2692 TSAN_MAYBE_INTERCEPT_EPOLL
;
2693 TSAN_INTERCEPT(close
);
2694 TSAN_MAYBE_INTERCEPT___CLOSE
;
2695 TSAN_MAYBE_INTERCEPT___RES_ICLOSE
;
2696 TSAN_INTERCEPT(pipe
);
2697 TSAN_INTERCEPT(pipe2
);
2699 TSAN_INTERCEPT(unlink
);
2700 TSAN_INTERCEPT(tmpfile
);
2701 TSAN_MAYBE_INTERCEPT_TMPFILE64
;
2702 TSAN_INTERCEPT(abort
);
2703 TSAN_INTERCEPT(rmdir
);
2704 TSAN_INTERCEPT(closedir
);
2706 TSAN_INTERCEPT(sigsuspend
);
2707 TSAN_INTERCEPT(sigblock
);
2708 TSAN_INTERCEPT(sigsetmask
);
2709 TSAN_INTERCEPT(pthread_sigmask
);
2710 TSAN_INTERCEPT(raise
);
2711 TSAN_INTERCEPT(kill
);
2712 TSAN_INTERCEPT(pthread_kill
);
2713 TSAN_INTERCEPT(sleep
);
2714 TSAN_INTERCEPT(usleep
);
2715 TSAN_INTERCEPT(nanosleep
);
2716 TSAN_INTERCEPT(pause
);
2717 TSAN_INTERCEPT(gettimeofday
);
2718 TSAN_INTERCEPT(getaddrinfo
);
2720 TSAN_INTERCEPT(fork
);
2721 TSAN_INTERCEPT(vfork
);
2722 #if !SANITIZER_ANDROID
2723 TSAN_INTERCEPT(dl_iterate_phdr
);
2725 TSAN_MAYBE_INTERCEPT_ON_EXIT
;
2726 TSAN_INTERCEPT(__cxa_atexit
);
2727 TSAN_INTERCEPT(_exit
);
2729 #ifdef NEED_TLS_GET_ADDR
2730 TSAN_INTERCEPT(__tls_get_addr
);
2733 TSAN_MAYBE_INTERCEPT__LWP_EXIT
;
2734 TSAN_MAYBE_INTERCEPT_THR_EXIT
;
2736 #if !SANITIZER_MAC && !SANITIZER_ANDROID
2737 // Need to setup it, because interceptors check that the function is resolved.
2738 // But atexit is emitted directly into the module, so can't be resolved.
2739 REAL(atexit
) = (int(*)(void(*)()))unreachable
;
2742 if (REAL(__cxa_atexit
)(&finalize
, 0, 0)) {
2743 Printf("ThreadSanitizer: failed to setup atexit callback\n");
2747 #if !SANITIZER_MAC && !SANITIZER_NETBSD && !SANITIZER_FREEBSD
2748 if (pthread_key_create(&interceptor_ctx()->finalize_key
, &thread_finalize
)) {
2749 Printf("ThreadSanitizer: failed to create thread key\n");
2754 TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(cond_init
);
2755 TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(cond_signal
);
2756 TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(cond_broadcast
);
2757 TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(cond_wait
);
2758 TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(cond_destroy
);
2759 TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(mutex_init
);
2760 TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(mutex_destroy
);
2761 TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(mutex_trylock
);
2762 TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(rwlock_init
);
2763 TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(rwlock_destroy
);
2764 TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(rwlock_rdlock
);
2765 TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(rwlock_tryrdlock
);
2766 TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(rwlock_wrlock
);
2767 TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(rwlock_trywrlock
);
2768 TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS(rwlock_unlock
);
2769 TSAN_MAYBE_INTERCEPT_NETBSD_ALIAS_THR(once
);
2774 } // namespace __tsan
2776 // Invisible barrier for tests.
2777 // There were several unsuccessful iterations for this functionality:
2778 // 1. Initially it was implemented in user code using
2779 // REAL(pthread_barrier_wait). But pthread_barrier_wait is not supported on
2780 // MacOS. Futexes are linux-specific for this matter.
2781 // 2. Then we switched to atomics+usleep(10). But usleep produced parasitic
2782 // "as-if synchronized via sleep" messages in reports which failed some
2784 // 3. Then we switched to atomics+sched_yield. But this produced tons of tsan-
2785 // visible events, which lead to "failed to restore stack trace" failures.
2786 // Note that no_sanitize_thread attribute does not turn off atomic interception
2787 // so attaching it to the function defined in user code does not help.
2788 // That's why we now have what we have.
2789 extern "C" SANITIZER_INTERFACE_ATTRIBUTE
2790 void __tsan_testonly_barrier_init(u64
*barrier
, u32 count
) {
2791 if (count
>= (1 << 8)) {
2792 Printf("barrier_init: count is too large (%d)\n", count
);
2795 // 8 lsb is thread count, the remaining are count of entered threads.
2799 extern "C" SANITIZER_INTERFACE_ATTRIBUTE
2800 void __tsan_testonly_barrier_wait(u64
*barrier
) {
2801 unsigned old
= __atomic_fetch_add(barrier
, 1 << 8, __ATOMIC_RELAXED
);
2802 unsigned old_epoch
= (old
>> 8) / (old
& 0xff);
2804 unsigned cur
= __atomic_load_n(barrier
, __ATOMIC_RELAXED
);
2805 unsigned cur_epoch
= (cur
>> 8) / (cur
& 0xff);
2806 if (cur_epoch
!= old_epoch
)
2808 internal_sched_yield();