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1 //===-- tsan_interceptors.cc ----------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file is a part of ThreadSanitizer (TSan), a race detector.
11 //
12 // FIXME: move as many interceptors as possible into
13 // sanitizer_common/sanitizer_common_interceptors.h
14 //===----------------------------------------------------------------------===//
15 
16 #include "sanitizer_common/sanitizer_atomic.h"
17 #include "sanitizer_common/sanitizer_libc.h"
18 #include "sanitizer_common/sanitizer_platform_limits_posix.h"
19 #include "sanitizer_common/sanitizer_placement_new.h"
20 #include "sanitizer_common/sanitizer_stacktrace.h"
21 #include "interception/interception.h"
22 #include "tsan_interface.h"
23 #include "tsan_platform.h"
24 #include "tsan_rtl.h"
25 #include "tsan_mman.h"
26 #include "tsan_fd.h"
27 
28 using namespace __tsan;  // NOLINT
29 
30 const int kSigCount = 128;
31 
32 struct my_siginfo_t {
33   int opaque[128];
34 };
35 
36 struct sigset_t {
37   u64 val[1024 / 8 / sizeof(u64)];
38 };
39 
40 struct ucontext_t {
41   uptr opaque[117];
42 };
43 
44 extern "C" int pthread_attr_init(void *attr);
45 extern "C" int pthread_attr_destroy(void *attr);
46 extern "C" int pthread_attr_getdetachstate(void *attr, int *v);
47 extern "C" int pthread_attr_setstacksize(void *attr, uptr stacksize);
48 extern "C" int pthread_attr_getstacksize(void *attr, uptr *stacksize);
49 extern "C" int pthread_key_create(unsigned *key, void (*destructor)(void* v));
50 extern "C" int pthread_setspecific(unsigned key, const void *v);
51 extern "C" int pthread_mutexattr_gettype(void *a, int *type);
52 extern "C" int pthread_yield();
53 extern "C" int pthread_sigmask(int how, const sigset_t *set, sigset_t *oldset);
54 extern "C" int sigfillset(sigset_t *set);
55 extern "C" void *pthread_self();
56 extern "C" void _exit(int status);
57 extern "C" int *__errno_location();
58 extern "C" int fileno_unlocked(void *stream);
59 extern "C" void *__libc_malloc(uptr size);
60 extern "C" void *__libc_calloc(uptr size, uptr n);
61 extern "C" void *__libc_realloc(void *ptr, uptr size);
62 extern "C" void __libc_free(void *ptr);
63 const int PTHREAD_MUTEX_RECURSIVE = 1;
64 const int PTHREAD_MUTEX_RECURSIVE_NP = 1;
65 const int kPthreadAttrSize = 56;
66 const int EINVAL = 22;
67 const int EBUSY = 16;
68 const int EPOLL_CTL_ADD = 1;
69 const int SIGILL = 4;
70 const int SIGABRT = 6;
71 const int SIGFPE = 8;
72 const int SIGSEGV = 11;
73 const int SIGPIPE = 13;
74 const int SIGBUS = 7;
75 void *const MAP_FAILED = (void*)-1;
76 const int PTHREAD_BARRIER_SERIAL_THREAD = -1;
77 const int MAP_FIXED = 0x10;
78 typedef long long_t;  // NOLINT
79 
80 // From /usr/include/unistd.h
81 # define F_ULOCK 0      /* Unlock a previously locked region.  */
82 # define F_LOCK  1      /* Lock a region for exclusive use.  */
83 # define F_TLOCK 2      /* Test and lock a region for exclusive use.  */
84 # define F_TEST  3      /* Test a region for other processes locks.  */
85 
86 typedef void (*sighandler_t)(int sig);
87 
88 #define errno (*__errno_location())
89 
90 struct sigaction_t {
91   union {
92     sighandler_t sa_handler;
93     void (*sa_sigaction)(int sig, my_siginfo_t *siginfo, void *uctx);
94   };
95   sigset_t sa_mask;
96   int sa_flags;
97   void (*sa_restorer)();
98 };
99 
100 const sighandler_t SIG_DFL = (sighandler_t)0;
101 const sighandler_t SIG_IGN = (sighandler_t)1;
102 const sighandler_t SIG_ERR = (sighandler_t)-1;
103 const int SA_SIGINFO = 4;
104 const int SIG_SETMASK = 2;
105 
106 namespace std {
107 struct nothrow_t {};
108 }  // namespace std
109 
110 static sigaction_t sigactions[kSigCount];
111 
112 namespace __tsan {
113 struct SignalDesc {
114   bool armed;
115   bool sigaction;
116   my_siginfo_t siginfo;
117   ucontext_t ctx;
118 };
119 
120 struct SignalContext {
121   int in_blocking_func;
122   int int_signal_send;
123   int pending_signal_count;
124   SignalDesc pending_signals[kSigCount];
125 };
126 }  // namespace __tsan
127 
SigCtx(ThreadState * thr)128 static SignalContext *SigCtx(ThreadState *thr) {
129   SignalContext *ctx = (SignalContext*)thr->signal_ctx;
130   if (ctx == 0 && thr->is_alive) {
131     ScopedInRtl in_rtl;
132     ctx = (SignalContext*)MmapOrDie(sizeof(*ctx), "SignalContext");
133     MemoryResetRange(thr, (uptr)&SigCtx, (uptr)ctx, sizeof(*ctx));
134     thr->signal_ctx = ctx;
135   }
136   return ctx;
137 }
138 
139 static unsigned g_thread_finalize_key;
140 
141 class ScopedInterceptor {
142  public:
143   ScopedInterceptor(ThreadState *thr, const char *fname, uptr pc);
144   ~ScopedInterceptor();
145  private:
146   ThreadState *const thr_;
147   const int in_rtl_;
148 };
149 
ScopedInterceptor(ThreadState * thr,const char * fname,uptr pc)150 ScopedInterceptor::ScopedInterceptor(ThreadState *thr, const char *fname,
151                                      uptr pc)
152     : thr_(thr)
153     , in_rtl_(thr->in_rtl) {
154   if (thr_->in_rtl == 0) {
155     Initialize(thr);
156     FuncEntry(thr, pc);
157     thr_->in_rtl++;
158     DPrintf("#%d: intercept %s()\n", thr_->tid, fname);
159   } else {
160     thr_->in_rtl++;
161   }
162 }
163 
~ScopedInterceptor()164 ScopedInterceptor::~ScopedInterceptor() {
165   thr_->in_rtl--;
166   if (thr_->in_rtl == 0) {
167     FuncExit(thr_);
168     ProcessPendingSignals(thr_);
169   }
170   CHECK_EQ(in_rtl_, thr_->in_rtl);
171 }
172 
173 #define SCOPED_INTERCEPTOR_RAW(func, ...) \
174     ThreadState *thr = cur_thread(); \
175     StatInc(thr, StatInterceptor); \
176     StatInc(thr, StatInt_##func); \
177     const uptr caller_pc = GET_CALLER_PC(); \
178     ScopedInterceptor si(thr, #func, caller_pc); \
179     const uptr pc = __sanitizer::StackTrace::GetPreviousInstructionPc( \
180         __sanitizer::StackTrace::GetCurrentPc()); \
181     (void)pc; \
182 /**/
183 
184 #define SCOPED_TSAN_INTERCEPTOR(func, ...) \
185     SCOPED_INTERCEPTOR_RAW(func, __VA_ARGS__); \
186     if (REAL(func) == 0) { \
187       Printf("FATAL: ThreadSanitizer: failed to intercept %s\n", #func); \
188       Die(); \
189     } \
190     if (thr->in_rtl > 1) \
191       return REAL(func)(__VA_ARGS__); \
192 /**/
193 
194 #define TSAN_INTERCEPTOR(ret, func, ...) INTERCEPTOR(ret, func, __VA_ARGS__)
195 #define TSAN_INTERCEPT(func) INTERCEPT_FUNCTION(func)
196 
197 #define BLOCK_REAL(name) (BlockingCall(thr), REAL(name))
198 
199 struct BlockingCall {
BlockingCallBlockingCall200   explicit BlockingCall(ThreadState *thr)
201       : ctx(SigCtx(thr)) {
202     ctx->in_blocking_func++;
203   }
204 
~BlockingCallBlockingCall205   ~BlockingCall() {
206     ctx->in_blocking_func--;
207   }
208 
209   SignalContext *ctx;
210 };
211 
TSAN_INTERCEPTOR(unsigned,sleep,unsigned sec)212 TSAN_INTERCEPTOR(unsigned, sleep, unsigned sec) {
213   SCOPED_TSAN_INTERCEPTOR(sleep, sec);
214   unsigned res = BLOCK_REAL(sleep)(sec);
215   AfterSleep(thr, pc);
216   return res;
217 }
218 
TSAN_INTERCEPTOR(int,usleep,long_t usec)219 TSAN_INTERCEPTOR(int, usleep, long_t usec) {
220   SCOPED_TSAN_INTERCEPTOR(usleep, usec);
221   int res = BLOCK_REAL(usleep)(usec);
222   AfterSleep(thr, pc);
223   return res;
224 }
225 
TSAN_INTERCEPTOR(int,nanosleep,void * req,void * rem)226 TSAN_INTERCEPTOR(int, nanosleep, void *req, void *rem) {
227   SCOPED_TSAN_INTERCEPTOR(nanosleep, req, rem);
228   int res = BLOCK_REAL(nanosleep)(req, rem);
229   AfterSleep(thr, pc);
230   return res;
231 }
232 
233 class AtExitContext {
234  public:
AtExitContext()235   AtExitContext()
236     : mtx_(MutexTypeAtExit, StatMtxAtExit)
237     , pos_() {
238   }
239 
240   typedef void(*atexit_t)();
241 
atexit(ThreadState * thr,uptr pc,bool is_on_exit,atexit_t f,void * arg)242   int atexit(ThreadState *thr, uptr pc, bool is_on_exit,
243              atexit_t f, void *arg) {
244     Lock l(&mtx_);
245     if (pos_ == kMaxAtExit)
246       return 1;
247     Release(thr, pc, (uptr)this);
248     stack_[pos_] = f;
249     args_[pos_] = arg;
250     is_on_exits_[pos_] = is_on_exit;
251     pos_++;
252     return 0;
253   }
254 
exit(ThreadState * thr,uptr pc)255   void exit(ThreadState *thr, uptr pc) {
256     CHECK_EQ(thr->in_rtl, 0);
257     for (;;) {
258       atexit_t f = 0;
259       void *arg = 0;
260       bool is_on_exit = false;
261       {
262         Lock l(&mtx_);
263         if (pos_) {
264           pos_--;
265           f = stack_[pos_];
266           arg = args_[pos_];
267           is_on_exit = is_on_exits_[pos_];
268           ScopedInRtl in_rtl;
269           Acquire(thr, pc, (uptr)this);
270         }
271       }
272       if (f == 0)
273         break;
274       DPrintf("#%d: executing atexit func %p\n", thr->tid, f);
275       CHECK_EQ(thr->in_rtl, 0);
276       if (is_on_exit)
277         ((void(*)(int status, void *arg))f)(0, arg);
278       else
279         ((void(*)(void *arg, void *dso))f)(arg, 0);
280     }
281   }
282 
283  private:
284   static const int kMaxAtExit = 128;
285   Mutex mtx_;
286   atexit_t stack_[kMaxAtExit];
287   void *args_[kMaxAtExit];
288   bool is_on_exits_[kMaxAtExit];
289   int pos_;
290 };
291 
292 static AtExitContext *atexit_ctx;
293 
finalize(void * arg)294 static void finalize(void *arg) {
295   ThreadState * thr = cur_thread();
296   uptr pc = 0;
297   atexit_ctx->exit(thr, pc);
298   int status = Finalize(cur_thread());
299   if (status)
300     _exit(status);
301 }
302 
TSAN_INTERCEPTOR(int,atexit,void (* f)())303 TSAN_INTERCEPTOR(int, atexit, void (*f)()) {
304   if (cur_thread()->in_symbolizer)
305     return 0;
306   SCOPED_TSAN_INTERCEPTOR(atexit, f);
307   return atexit_ctx->atexit(thr, pc, false, (void(*)())f, 0);
308 }
309 
TSAN_INTERCEPTOR(int,on_exit,void (* f)(int,void *),void * arg)310 TSAN_INTERCEPTOR(int, on_exit, void(*f)(int, void*), void *arg) {
311   if (cur_thread()->in_symbolizer)
312     return 0;
313   SCOPED_TSAN_INTERCEPTOR(on_exit, f, arg);
314   return atexit_ctx->atexit(thr, pc, true, (void(*)())f, arg);
315 }
316 
TSAN_INTERCEPTOR(int,__cxa_atexit,void (* f)(void * a),void * arg,void * dso)317 TSAN_INTERCEPTOR(int, __cxa_atexit, void (*f)(void *a), void *arg, void *dso) {
318   if (cur_thread()->in_symbolizer)
319     return 0;
320   SCOPED_TSAN_INTERCEPTOR(__cxa_atexit, f, arg, dso);
321   if (dso)
322     return REAL(__cxa_atexit)(f, arg, dso);
323   return atexit_ctx->atexit(thr, pc, false, (void(*)())f, arg);
324 }
325 
TSAN_INTERCEPTOR(void,longjmp,void * env,int val)326 TSAN_INTERCEPTOR(void, longjmp, void *env, int val) {
327   SCOPED_TSAN_INTERCEPTOR(longjmp, env, val);
328   Printf("ThreadSanitizer: longjmp() is not supported\n");
329   Die();
330 }
331 
TSAN_INTERCEPTOR(void,siglongjmp,void * env,int val)332 TSAN_INTERCEPTOR(void, siglongjmp, void *env, int val) {
333   SCOPED_TSAN_INTERCEPTOR(siglongjmp, env, val);
334   Printf("ThreadSanitizer: siglongjmp() is not supported\n");
335   Die();
336 }
337 
TSAN_INTERCEPTOR(void *,malloc,uptr size)338 TSAN_INTERCEPTOR(void*, malloc, uptr size) {
339   if (cur_thread()->in_symbolizer)
340     return __libc_malloc(size);
341   void *p = 0;
342   {
343     SCOPED_INTERCEPTOR_RAW(malloc, size);
344     p = user_alloc(thr, pc, size);
345   }
346   invoke_malloc_hook(p, size);
347   return p;
348 }
349 
TSAN_INTERCEPTOR(void *,__libc_memalign,uptr align,uptr sz)350 TSAN_INTERCEPTOR(void*, __libc_memalign, uptr align, uptr sz) {
351   SCOPED_TSAN_INTERCEPTOR(__libc_memalign, align, sz);
352   return user_alloc(thr, pc, sz, align);
353 }
354 
TSAN_INTERCEPTOR(void *,calloc,uptr size,uptr n)355 TSAN_INTERCEPTOR(void*, calloc, uptr size, uptr n) {
356   if (cur_thread()->in_symbolizer)
357     return __libc_calloc(size, n);
358   if (__sanitizer::CallocShouldReturnNullDueToOverflow(size, n)) return 0;
359   void *p = 0;
360   {
361     SCOPED_INTERCEPTOR_RAW(calloc, size, n);
362     p = user_alloc(thr, pc, n * size);
363     if (p) internal_memset(p, 0, n * size);
364   }
365   invoke_malloc_hook(p, n * size);
366   return p;
367 }
368 
TSAN_INTERCEPTOR(void *,realloc,void * p,uptr size)369 TSAN_INTERCEPTOR(void*, realloc, void *p, uptr size) {
370   if (cur_thread()->in_symbolizer)
371     return __libc_realloc(p, size);
372   if (p)
373     invoke_free_hook(p);
374   {
375     SCOPED_INTERCEPTOR_RAW(realloc, p, size);
376     p = user_realloc(thr, pc, p, size);
377   }
378   invoke_malloc_hook(p, size);
379   return p;
380 }
381 
TSAN_INTERCEPTOR(void,free,void * p)382 TSAN_INTERCEPTOR(void, free, void *p) {
383   if (p == 0)
384     return;
385   if (cur_thread()->in_symbolizer)
386     return __libc_free(p);
387   invoke_free_hook(p);
388   SCOPED_INTERCEPTOR_RAW(free, p);
389   user_free(thr, pc, p);
390 }
391 
TSAN_INTERCEPTOR(void,cfree,void * p)392 TSAN_INTERCEPTOR(void, cfree, void *p) {
393   if (p == 0)
394     return;
395   if (cur_thread()->in_symbolizer)
396     return __libc_free(p);
397   invoke_free_hook(p);
398   SCOPED_INTERCEPTOR_RAW(cfree, p);
399   user_free(thr, pc, p);
400 }
401 
TSAN_INTERCEPTOR(uptr,malloc_usable_size,void * p)402 TSAN_INTERCEPTOR(uptr, malloc_usable_size, void *p) {
403   SCOPED_INTERCEPTOR_RAW(malloc_usable_size, p);
404   return user_alloc_usable_size(thr, pc, p);
405 }
406 
407 #define OPERATOR_NEW_BODY(mangled_name) \
408   if (cur_thread()->in_symbolizer) \
409     return __libc_malloc(size); \
410   void *p = 0; \
411   {  \
412     SCOPED_INTERCEPTOR_RAW(mangled_name, size); \
413     p = user_alloc(thr, pc, size); \
414   }  \
415   invoke_malloc_hook(p, size);  \
416   return p;
417 
operator new(__sanitizer::uptr size)418 void *operator new(__sanitizer::uptr size) {
419   OPERATOR_NEW_BODY(_Znwm);
420 }
operator new[](__sanitizer::uptr size)421 void *operator new[](__sanitizer::uptr size) {
422   OPERATOR_NEW_BODY(_Znam);
423 }
operator new(__sanitizer::uptr size,std::nothrow_t const &)424 void *operator new(__sanitizer::uptr size, std::nothrow_t const&) {
425   OPERATOR_NEW_BODY(_ZnwmRKSt9nothrow_t);
426 }
operator new[](__sanitizer::uptr size,std::nothrow_t const &)427 void *operator new[](__sanitizer::uptr size, std::nothrow_t const&) {
428   OPERATOR_NEW_BODY(_ZnamRKSt9nothrow_t);
429 }
430 
431 #define OPERATOR_DELETE_BODY(mangled_name) \
432   if (ptr == 0) return;  \
433   if (cur_thread()->in_symbolizer) \
434     return __libc_free(ptr); \
435   invoke_free_hook(ptr);  \
436   SCOPED_INTERCEPTOR_RAW(mangled_name, ptr);  \
437   user_free(thr, pc, ptr);
438 
operator delete(void * ptr)439 void operator delete(void *ptr) {
440   OPERATOR_DELETE_BODY(_ZdlPv);
441 }
operator delete[](void * ptr)442 void operator delete[](void *ptr) {
443   OPERATOR_DELETE_BODY(_ZdlPvRKSt9nothrow_t);
444 }
operator delete(void * ptr,std::nothrow_t const &)445 void operator delete(void *ptr, std::nothrow_t const&) {
446   OPERATOR_DELETE_BODY(_ZdaPv);
447 }
operator delete[](void * ptr,std::nothrow_t const &)448 void operator delete[](void *ptr, std::nothrow_t const&) {
449   OPERATOR_DELETE_BODY(_ZdaPvRKSt9nothrow_t);
450 }
451 
TSAN_INTERCEPTOR(uptr,strlen,const char * s)452 TSAN_INTERCEPTOR(uptr, strlen, const char *s) {
453   SCOPED_TSAN_INTERCEPTOR(strlen, s);
454   uptr len = internal_strlen(s);
455   MemoryAccessRange(thr, pc, (uptr)s, len + 1, false);
456   return len;
457 }
458 
TSAN_INTERCEPTOR(void *,memset,void * dst,int v,uptr size)459 TSAN_INTERCEPTOR(void*, memset, void *dst, int v, uptr size) {
460   SCOPED_TSAN_INTERCEPTOR(memset, dst, v, size);
461   MemoryAccessRange(thr, pc, (uptr)dst, size, true);
462   return internal_memset(dst, v, size);
463 }
464 
TSAN_INTERCEPTOR(void *,memcpy,void * dst,const void * src,uptr size)465 TSAN_INTERCEPTOR(void*, memcpy, void *dst, const void *src, uptr size) {
466   SCOPED_TSAN_INTERCEPTOR(memcpy, dst, src, size);
467   MemoryAccessRange(thr, pc, (uptr)dst, size, true);
468   MemoryAccessRange(thr, pc, (uptr)src, size, false);
469   return internal_memcpy(dst, src, size);
470 }
471 
TSAN_INTERCEPTOR(int,memcmp,const void * s1,const void * s2,uptr n)472 TSAN_INTERCEPTOR(int, memcmp, const void *s1, const void *s2, uptr n) {
473   SCOPED_TSAN_INTERCEPTOR(memcmp, s1, s2, n);
474   int res = 0;
475   uptr len = 0;
476   for (; len < n; len++) {
477     if ((res = ((unsigned char*)s1)[len] - ((unsigned char*)s2)[len]))
478       break;
479   }
480   MemoryAccessRange(thr, pc, (uptr)s1, len < n ? len + 1 : n, false);
481   MemoryAccessRange(thr, pc, (uptr)s2, len < n ? len + 1 : n, false);
482   return res;
483 }
484 
TSAN_INTERCEPTOR(int,strcmp,const char * s1,const char * s2)485 TSAN_INTERCEPTOR(int, strcmp, const char *s1, const char *s2) {
486   SCOPED_TSAN_INTERCEPTOR(strcmp, s1, s2);
487   uptr len = 0;
488   for (; s1[len] && s2[len]; len++) {
489     if (s1[len] != s2[len])
490       break;
491   }
492   MemoryAccessRange(thr, pc, (uptr)s1, len + 1, false);
493   MemoryAccessRange(thr, pc, (uptr)s2, len + 1, false);
494   return s1[len] - s2[len];
495 }
496 
TSAN_INTERCEPTOR(int,strncmp,const char * s1,const char * s2,uptr n)497 TSAN_INTERCEPTOR(int, strncmp, const char *s1, const char *s2, uptr n) {
498   SCOPED_TSAN_INTERCEPTOR(strncmp, s1, s2, n);
499   uptr len = 0;
500   for (; len < n && s1[len] && s2[len]; len++) {
501     if (s1[len] != s2[len])
502       break;
503   }
504   MemoryAccessRange(thr, pc, (uptr)s1, len < n ? len + 1 : n, false);
505   MemoryAccessRange(thr, pc, (uptr)s2, len < n ? len + 1 : n, false);
506   return len == n ? 0 : s1[len] - s2[len];
507 }
508 
TSAN_INTERCEPTOR(void *,memchr,void * s,int c,uptr n)509 TSAN_INTERCEPTOR(void*, memchr, void *s, int c, uptr n) {
510   SCOPED_TSAN_INTERCEPTOR(memchr, s, c, n);
511   void *res = REAL(memchr)(s, c, n);
512   uptr len = res ? (char*)res - (char*)s + 1 : n;
513   MemoryAccessRange(thr, pc, (uptr)s, len, false);
514   return res;
515 }
516 
TSAN_INTERCEPTOR(void *,memrchr,char * s,int c,uptr n)517 TSAN_INTERCEPTOR(void*, memrchr, char *s, int c, uptr n) {
518   SCOPED_TSAN_INTERCEPTOR(memrchr, s, c, n);
519   MemoryAccessRange(thr, pc, (uptr)s, n, false);
520   return REAL(memrchr)(s, c, n);
521 }
522 
TSAN_INTERCEPTOR(void *,memmove,void * dst,void * src,uptr n)523 TSAN_INTERCEPTOR(void*, memmove, void *dst, void *src, uptr n) {
524   SCOPED_TSAN_INTERCEPTOR(memmove, dst, src, n);
525   MemoryAccessRange(thr, pc, (uptr)dst, n, true);
526   MemoryAccessRange(thr, pc, (uptr)src, n, false);
527   return REAL(memmove)(dst, src, n);
528 }
529 
TSAN_INTERCEPTOR(char *,strchr,char * s,int c)530 TSAN_INTERCEPTOR(char*, strchr, char *s, int c) {
531   SCOPED_TSAN_INTERCEPTOR(strchr, s, c);
532   char *res = REAL(strchr)(s, c);
533   uptr len = res ? (char*)res - (char*)s + 1 : internal_strlen(s) + 1;
534   MemoryAccessRange(thr, pc, (uptr)s, len, false);
535   return res;
536 }
537 
TSAN_INTERCEPTOR(char *,strchrnul,char * s,int c)538 TSAN_INTERCEPTOR(char*, strchrnul, char *s, int c) {
539   SCOPED_TSAN_INTERCEPTOR(strchrnul, s, c);
540   char *res = REAL(strchrnul)(s, c);
541   uptr len = (char*)res - (char*)s + 1;
542   MemoryAccessRange(thr, pc, (uptr)s, len, false);
543   return res;
544 }
545 
TSAN_INTERCEPTOR(char *,strrchr,char * s,int c)546 TSAN_INTERCEPTOR(char*, strrchr, char *s, int c) {
547   SCOPED_TSAN_INTERCEPTOR(strrchr, s, c);
548   MemoryAccessRange(thr, pc, (uptr)s, internal_strlen(s) + 1, false);
549   return REAL(strrchr)(s, c);
550 }
551 
TSAN_INTERCEPTOR(char *,strcpy,char * dst,const char * src)552 TSAN_INTERCEPTOR(char*, strcpy, char *dst, const char *src) {  // NOLINT
553   SCOPED_TSAN_INTERCEPTOR(strcpy, dst, src);  // NOLINT
554   uptr srclen = internal_strlen(src);
555   MemoryAccessRange(thr, pc, (uptr)dst, srclen + 1, true);
556   MemoryAccessRange(thr, pc, (uptr)src, srclen + 1, false);
557   return REAL(strcpy)(dst, src);  // NOLINT
558 }
559 
TSAN_INTERCEPTOR(char *,strncpy,char * dst,char * src,uptr n)560 TSAN_INTERCEPTOR(char*, strncpy, char *dst, char *src, uptr n) {
561   SCOPED_TSAN_INTERCEPTOR(strncpy, dst, src, n);
562   uptr srclen = internal_strnlen(src, n);
563   MemoryAccessRange(thr, pc, (uptr)dst, n, true);
564   MemoryAccessRange(thr, pc, (uptr)src, min(srclen + 1, n), false);
565   return REAL(strncpy)(dst, src, n);
566 }
567 
TSAN_INTERCEPTOR(const char *,strstr,const char * s1,const char * s2)568 TSAN_INTERCEPTOR(const char*, strstr, const char *s1, const char *s2) {
569   SCOPED_TSAN_INTERCEPTOR(strstr, s1, s2);
570   const char *res = REAL(strstr)(s1, s2);
571   uptr len1 = internal_strlen(s1);
572   uptr len2 = internal_strlen(s2);
573   MemoryAccessRange(thr, pc, (uptr)s1, len1 + 1, false);
574   MemoryAccessRange(thr, pc, (uptr)s2, len2 + 1, false);
575   return res;
576 }
577 
fix_mmap_addr(void ** addr,long_t sz,int flags)578 static bool fix_mmap_addr(void **addr, long_t sz, int flags) {
579   if (*addr) {
580     if (!IsAppMem((uptr)*addr) || !IsAppMem((uptr)*addr + sz - 1)) {
581       if (flags & MAP_FIXED) {
582         errno = EINVAL;
583         return false;
584       } else {
585         *addr = 0;
586       }
587     }
588   }
589   return true;
590 }
591 
TSAN_INTERCEPTOR(void *,mmap,void * addr,long_t sz,int prot,int flags,int fd,unsigned off)592 TSAN_INTERCEPTOR(void*, mmap, void *addr, long_t sz, int prot,
593                          int flags, int fd, unsigned off) {
594   SCOPED_TSAN_INTERCEPTOR(mmap, addr, sz, prot, flags, fd, off);
595   if (!fix_mmap_addr(&addr, sz, flags))
596     return MAP_FAILED;
597   void *res = REAL(mmap)(addr, sz, prot, flags, fd, off);
598   if (res != MAP_FAILED) {
599     if (fd > 0)
600       FdAccess(thr, pc, fd);
601     MemoryRangeImitateWrite(thr, pc, (uptr)res, sz);
602   }
603   return res;
604 }
605 
TSAN_INTERCEPTOR(void *,mmap64,void * addr,long_t sz,int prot,int flags,int fd,u64 off)606 TSAN_INTERCEPTOR(void*, mmap64, void *addr, long_t sz, int prot,
607                            int flags, int fd, u64 off) {
608   SCOPED_TSAN_INTERCEPTOR(mmap64, addr, sz, prot, flags, fd, off);
609   if (!fix_mmap_addr(&addr, sz, flags))
610     return MAP_FAILED;
611   void *res = REAL(mmap64)(addr, sz, prot, flags, fd, off);
612   if (res != MAP_FAILED) {
613     if (fd > 0)
614       FdAccess(thr, pc, fd);
615     MemoryRangeImitateWrite(thr, pc, (uptr)res, sz);
616   }
617   return res;
618 }
619 
TSAN_INTERCEPTOR(int,munmap,void * addr,long_t sz)620 TSAN_INTERCEPTOR(int, munmap, void *addr, long_t sz) {
621   SCOPED_TSAN_INTERCEPTOR(munmap, addr, sz);
622   DontNeedShadowFor((uptr)addr, sz);
623   int res = REAL(munmap)(addr, sz);
624   return res;
625 }
626 
TSAN_INTERCEPTOR(void *,memalign,uptr align,uptr sz)627 TSAN_INTERCEPTOR(void*, memalign, uptr align, uptr sz) {
628   SCOPED_TSAN_INTERCEPTOR(memalign, align, sz);
629   return user_alloc(thr, pc, sz, align);
630 }
631 
TSAN_INTERCEPTOR(void *,valloc,uptr sz)632 TSAN_INTERCEPTOR(void*, valloc, uptr sz) {
633   SCOPED_TSAN_INTERCEPTOR(valloc, sz);
634   return user_alloc(thr, pc, sz, GetPageSizeCached());
635 }
636 
TSAN_INTERCEPTOR(void *,pvalloc,uptr sz)637 TSAN_INTERCEPTOR(void*, pvalloc, uptr sz) {
638   SCOPED_TSAN_INTERCEPTOR(pvalloc, sz);
639   sz = RoundUp(sz, GetPageSizeCached());
640   return user_alloc(thr, pc, sz, GetPageSizeCached());
641 }
642 
TSAN_INTERCEPTOR(int,posix_memalign,void ** memptr,uptr align,uptr sz)643 TSAN_INTERCEPTOR(int, posix_memalign, void **memptr, uptr align, uptr sz) {
644   SCOPED_TSAN_INTERCEPTOR(posix_memalign, memptr, align, sz);
645   *memptr = user_alloc(thr, pc, sz, align);
646   return 0;
647 }
648 
649 // Used in thread-safe function static initialization.
__cxa_guard_acquire(atomic_uint32_t * g)650 extern "C" int INTERFACE_ATTRIBUTE __cxa_guard_acquire(atomic_uint32_t *g) {
651   SCOPED_INTERCEPTOR_RAW(__cxa_guard_acquire, g);
652   for (;;) {
653     u32 cmp = atomic_load(g, memory_order_acquire);
654     if (cmp == 0) {
655       if (atomic_compare_exchange_strong(g, &cmp, 1<<16, memory_order_relaxed))
656         return 1;
657     } else if (cmp == 1) {
658       Acquire(thr, pc, (uptr)g);
659       return 0;
660     } else {
661       internal_sched_yield();
662     }
663   }
664 }
665 
__cxa_guard_release(atomic_uint32_t * g)666 extern "C" void INTERFACE_ATTRIBUTE __cxa_guard_release(atomic_uint32_t *g) {
667   SCOPED_INTERCEPTOR_RAW(__cxa_guard_release, g);
668   Release(thr, pc, (uptr)g);
669   atomic_store(g, 1, memory_order_release);
670 }
671 
__cxa_guard_abort(atomic_uint32_t * g)672 extern "C" void INTERFACE_ATTRIBUTE __cxa_guard_abort(atomic_uint32_t *g) {
673   SCOPED_INTERCEPTOR_RAW(__cxa_guard_abort, g);
674   atomic_store(g, 0, memory_order_relaxed);
675 }
676 
thread_finalize(void * v)677 static void thread_finalize(void *v) {
678   uptr iter = (uptr)v;
679   if (iter > 1) {
680     if (pthread_setspecific(g_thread_finalize_key, (void*)(iter - 1))) {
681       Printf("ThreadSanitizer: failed to set thread key\n");
682       Die();
683     }
684     return;
685   }
686   {
687     ScopedInRtl in_rtl;
688     ThreadState *thr = cur_thread();
689     ThreadFinish(thr);
690     SignalContext *sctx = thr->signal_ctx;
691     if (sctx) {
692       thr->signal_ctx = 0;
693       UnmapOrDie(sctx, sizeof(*sctx));
694     }
695   }
696 }
697 
698 
699 struct ThreadParam {
700   void* (*callback)(void *arg);
701   void *param;
702   atomic_uintptr_t tid;
703 };
704 
__tsan_thread_start_func(void * arg)705 extern "C" void *__tsan_thread_start_func(void *arg) {
706   ThreadParam *p = (ThreadParam*)arg;
707   void* (*callback)(void *arg) = p->callback;
708   void *param = p->param;
709   int tid = 0;
710   {
711     ThreadState *thr = cur_thread();
712     ScopedInRtl in_rtl;
713     if (pthread_setspecific(g_thread_finalize_key, (void*)4)) {
714       Printf("ThreadSanitizer: failed to set thread key\n");
715       Die();
716     }
717     while ((tid = atomic_load(&p->tid, memory_order_acquire)) == 0)
718       pthread_yield();
719     atomic_store(&p->tid, 0, memory_order_release);
720     ThreadStart(thr, tid, GetTid());
721     CHECK_EQ(thr->in_rtl, 1);
722   }
723   void *res = callback(param);
724   // Prevent the callback from being tail called,
725   // it mixes up stack traces.
726   volatile int foo = 42;
727   foo++;
728   return res;
729 }
730 
TSAN_INTERCEPTOR(int,pthread_create,void * th,void * attr,void * (* callback)(void *),void * param)731 TSAN_INTERCEPTOR(int, pthread_create,
732     void *th, void *attr, void *(*callback)(void*), void * param) {
733   SCOPED_TSAN_INTERCEPTOR(pthread_create, th, attr, callback, param);
734   __sanitizer_pthread_attr_t myattr;
735   if (attr == 0) {
736     pthread_attr_init(&myattr);
737     attr = &myattr;
738   }
739   int detached = 0;
740   pthread_attr_getdetachstate(attr, &detached);
741   uptr stacksize = 0;
742   pthread_attr_getstacksize(attr, &stacksize);
743   // We place the huge ThreadState object into TLS, account for that.
744   const uptr minstacksize = GetTlsSize() + 128*1024;
745   if (stacksize < minstacksize) {
746     DPrintf("ThreadSanitizer: stacksize %zu->%zu\n", stacksize, minstacksize);
747     pthread_attr_setstacksize(attr, minstacksize);
748   }
749   ThreadParam p;
750   p.callback = callback;
751   p.param = param;
752   atomic_store(&p.tid, 0, memory_order_relaxed);
753   int res = REAL(pthread_create)(th, attr, __tsan_thread_start_func, &p);
754   if (res == 0) {
755     int tid = ThreadCreate(thr, pc, *(uptr*)th, detached);
756     CHECK_NE(tid, 0);
757     atomic_store(&p.tid, tid, memory_order_release);
758     while (atomic_load(&p.tid, memory_order_acquire) != 0)
759       pthread_yield();
760   }
761   if (attr == &myattr)
762     pthread_attr_destroy(&myattr);
763   return res;
764 }
765 
TSAN_INTERCEPTOR(int,pthread_join,void * th,void ** ret)766 TSAN_INTERCEPTOR(int, pthread_join, void *th, void **ret) {
767   SCOPED_TSAN_INTERCEPTOR(pthread_join, th, ret);
768   int tid = ThreadTid(thr, pc, (uptr)th);
769   int res = BLOCK_REAL(pthread_join)(th, ret);
770   if (res == 0) {
771     ThreadJoin(thr, pc, tid);
772   }
773   return res;
774 }
775 
TSAN_INTERCEPTOR(int,pthread_detach,void * th)776 TSAN_INTERCEPTOR(int, pthread_detach, void *th) {
777   SCOPED_TSAN_INTERCEPTOR(pthread_detach, th);
778   int tid = ThreadTid(thr, pc, (uptr)th);
779   int res = REAL(pthread_detach)(th);
780   if (res == 0) {
781     ThreadDetach(thr, pc, tid);
782   }
783   return res;
784 }
785 
TSAN_INTERCEPTOR(int,pthread_mutex_init,void * m,void * a)786 TSAN_INTERCEPTOR(int, pthread_mutex_init, void *m, void *a) {
787   SCOPED_TSAN_INTERCEPTOR(pthread_mutex_init, m, a);
788   int res = REAL(pthread_mutex_init)(m, a);
789   if (res == 0) {
790     bool recursive = false;
791     if (a) {
792       int type = 0;
793       if (pthread_mutexattr_gettype(a, &type) == 0)
794         recursive = (type == PTHREAD_MUTEX_RECURSIVE
795             || type == PTHREAD_MUTEX_RECURSIVE_NP);
796     }
797     MutexCreate(thr, pc, (uptr)m, false, recursive, false);
798   }
799   return res;
800 }
801 
TSAN_INTERCEPTOR(int,pthread_mutex_destroy,void * m)802 TSAN_INTERCEPTOR(int, pthread_mutex_destroy, void *m) {
803   SCOPED_TSAN_INTERCEPTOR(pthread_mutex_destroy, m);
804   int res = REAL(pthread_mutex_destroy)(m);
805   if (res == 0 || res == EBUSY) {
806     MutexDestroy(thr, pc, (uptr)m);
807   }
808   return res;
809 }
810 
TSAN_INTERCEPTOR(int,pthread_mutex_lock,void * m)811 TSAN_INTERCEPTOR(int, pthread_mutex_lock, void *m) {
812   SCOPED_TSAN_INTERCEPTOR(pthread_mutex_lock, m);
813   int res = REAL(pthread_mutex_lock)(m);
814   if (res == 0) {
815     MutexLock(thr, pc, (uptr)m);
816   }
817   return res;
818 }
819 
TSAN_INTERCEPTOR(int,pthread_mutex_trylock,void * m)820 TSAN_INTERCEPTOR(int, pthread_mutex_trylock, void *m) {
821   SCOPED_TSAN_INTERCEPTOR(pthread_mutex_trylock, m);
822   int res = REAL(pthread_mutex_trylock)(m);
823   if (res == 0) {
824     MutexLock(thr, pc, (uptr)m);
825   }
826   return res;
827 }
828 
TSAN_INTERCEPTOR(int,pthread_mutex_timedlock,void * m,void * abstime)829 TSAN_INTERCEPTOR(int, pthread_mutex_timedlock, void *m, void *abstime) {
830   SCOPED_TSAN_INTERCEPTOR(pthread_mutex_timedlock, m, abstime);
831   int res = REAL(pthread_mutex_timedlock)(m, abstime);
832   if (res == 0) {
833     MutexLock(thr, pc, (uptr)m);
834   }
835   return res;
836 }
837 
TSAN_INTERCEPTOR(int,pthread_mutex_unlock,void * m)838 TSAN_INTERCEPTOR(int, pthread_mutex_unlock, void *m) {
839   SCOPED_TSAN_INTERCEPTOR(pthread_mutex_unlock, m);
840   MutexUnlock(thr, pc, (uptr)m);
841   int res = REAL(pthread_mutex_unlock)(m);
842   return res;
843 }
844 
TSAN_INTERCEPTOR(int,pthread_spin_init,void * m,int pshared)845 TSAN_INTERCEPTOR(int, pthread_spin_init, void *m, int pshared) {
846   SCOPED_TSAN_INTERCEPTOR(pthread_spin_init, m, pshared);
847   int res = REAL(pthread_spin_init)(m, pshared);
848   if (res == 0) {
849     MutexCreate(thr, pc, (uptr)m, false, false, false);
850   }
851   return res;
852 }
853 
TSAN_INTERCEPTOR(int,pthread_spin_destroy,void * m)854 TSAN_INTERCEPTOR(int, pthread_spin_destroy, void *m) {
855   SCOPED_TSAN_INTERCEPTOR(pthread_spin_destroy, m);
856   int res = REAL(pthread_spin_destroy)(m);
857   if (res == 0) {
858     MutexDestroy(thr, pc, (uptr)m);
859   }
860   return res;
861 }
862 
TSAN_INTERCEPTOR(int,pthread_spin_lock,void * m)863 TSAN_INTERCEPTOR(int, pthread_spin_lock, void *m) {
864   SCOPED_TSAN_INTERCEPTOR(pthread_spin_lock, m);
865   int res = REAL(pthread_spin_lock)(m);
866   if (res == 0) {
867     MutexLock(thr, pc, (uptr)m);
868   }
869   return res;
870 }
871 
TSAN_INTERCEPTOR(int,pthread_spin_trylock,void * m)872 TSAN_INTERCEPTOR(int, pthread_spin_trylock, void *m) {
873   SCOPED_TSAN_INTERCEPTOR(pthread_spin_trylock, m);
874   int res = REAL(pthread_spin_trylock)(m);
875   if (res == 0) {
876     MutexLock(thr, pc, (uptr)m);
877   }
878   return res;
879 }
880 
TSAN_INTERCEPTOR(int,pthread_spin_unlock,void * m)881 TSAN_INTERCEPTOR(int, pthread_spin_unlock, void *m) {
882   SCOPED_TSAN_INTERCEPTOR(pthread_spin_unlock, m);
883   MutexUnlock(thr, pc, (uptr)m);
884   int res = REAL(pthread_spin_unlock)(m);
885   return res;
886 }
887 
TSAN_INTERCEPTOR(int,pthread_rwlock_init,void * m,void * a)888 TSAN_INTERCEPTOR(int, pthread_rwlock_init, void *m, void *a) {
889   SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_init, m, a);
890   int res = REAL(pthread_rwlock_init)(m, a);
891   if (res == 0) {
892     MutexCreate(thr, pc, (uptr)m, true, false, false);
893   }
894   return res;
895 }
896 
TSAN_INTERCEPTOR(int,pthread_rwlock_destroy,void * m)897 TSAN_INTERCEPTOR(int, pthread_rwlock_destroy, void *m) {
898   SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_destroy, m);
899   int res = REAL(pthread_rwlock_destroy)(m);
900   if (res == 0) {
901     MutexDestroy(thr, pc, (uptr)m);
902   }
903   return res;
904 }
905 
TSAN_INTERCEPTOR(int,pthread_rwlock_rdlock,void * m)906 TSAN_INTERCEPTOR(int, pthread_rwlock_rdlock, void *m) {
907   SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_rdlock, m);
908   int res = REAL(pthread_rwlock_rdlock)(m);
909   if (res == 0) {
910     MutexReadLock(thr, pc, (uptr)m);
911   }
912   return res;
913 }
914 
TSAN_INTERCEPTOR(int,pthread_rwlock_tryrdlock,void * m)915 TSAN_INTERCEPTOR(int, pthread_rwlock_tryrdlock, void *m) {
916   SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_tryrdlock, m);
917   int res = REAL(pthread_rwlock_tryrdlock)(m);
918   if (res == 0) {
919     MutexReadLock(thr, pc, (uptr)m);
920   }
921   return res;
922 }
923 
TSAN_INTERCEPTOR(int,pthread_rwlock_timedrdlock,void * m,void * abstime)924 TSAN_INTERCEPTOR(int, pthread_rwlock_timedrdlock, void *m, void *abstime) {
925   SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_timedrdlock, m, abstime);
926   int res = REAL(pthread_rwlock_timedrdlock)(m, abstime);
927   if (res == 0) {
928     MutexReadLock(thr, pc, (uptr)m);
929   }
930   return res;
931 }
932 
TSAN_INTERCEPTOR(int,pthread_rwlock_wrlock,void * m)933 TSAN_INTERCEPTOR(int, pthread_rwlock_wrlock, void *m) {
934   SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_wrlock, m);
935   int res = REAL(pthread_rwlock_wrlock)(m);
936   if (res == 0) {
937     MutexLock(thr, pc, (uptr)m);
938   }
939   return res;
940 }
941 
TSAN_INTERCEPTOR(int,pthread_rwlock_trywrlock,void * m)942 TSAN_INTERCEPTOR(int, pthread_rwlock_trywrlock, void *m) {
943   SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_trywrlock, m);
944   int res = REAL(pthread_rwlock_trywrlock)(m);
945   if (res == 0) {
946     MutexLock(thr, pc, (uptr)m);
947   }
948   return res;
949 }
950 
TSAN_INTERCEPTOR(int,pthread_rwlock_timedwrlock,void * m,void * abstime)951 TSAN_INTERCEPTOR(int, pthread_rwlock_timedwrlock, void *m, void *abstime) {
952   SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_timedwrlock, m, abstime);
953   int res = REAL(pthread_rwlock_timedwrlock)(m, abstime);
954   if (res == 0) {
955     MutexLock(thr, pc, (uptr)m);
956   }
957   return res;
958 }
959 
TSAN_INTERCEPTOR(int,pthread_rwlock_unlock,void * m)960 TSAN_INTERCEPTOR(int, pthread_rwlock_unlock, void *m) {
961   SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_unlock, m);
962   MutexReadOrWriteUnlock(thr, pc, (uptr)m);
963   int res = REAL(pthread_rwlock_unlock)(m);
964   return res;
965 }
966 
967 // libpthread.so contains several versions of pthread_cond_init symbol.
968 // When we just dlsym() it, we get the wrong (old) version.
969 /*
970 TSAN_INTERCEPTOR(int, pthread_cond_init, void *c, void *a) {
971   SCOPED_TSAN_INTERCEPTOR(pthread_cond_init, c, a);
972   int res = REAL(pthread_cond_init)(c, a);
973   return res;
974 }
975 */
976 
TSAN_INTERCEPTOR(int,pthread_cond_destroy,void * c)977 TSAN_INTERCEPTOR(int, pthread_cond_destroy, void *c) {
978   SCOPED_TSAN_INTERCEPTOR(pthread_cond_destroy, c);
979   int res = REAL(pthread_cond_destroy)(c);
980   return res;
981 }
982 
TSAN_INTERCEPTOR(int,pthread_cond_signal,void * c)983 TSAN_INTERCEPTOR(int, pthread_cond_signal, void *c) {
984   SCOPED_TSAN_INTERCEPTOR(pthread_cond_signal, c);
985   int res = REAL(pthread_cond_signal)(c);
986   return res;
987 }
988 
TSAN_INTERCEPTOR(int,pthread_cond_broadcast,void * c)989 TSAN_INTERCEPTOR(int, pthread_cond_broadcast, void *c) {
990   SCOPED_TSAN_INTERCEPTOR(pthread_cond_broadcast, c);
991   int res = REAL(pthread_cond_broadcast)(c);
992   return res;
993 }
994 
TSAN_INTERCEPTOR(int,pthread_cond_wait,void * c,void * m)995 TSAN_INTERCEPTOR(int, pthread_cond_wait, void *c, void *m) {
996   SCOPED_TSAN_INTERCEPTOR(pthread_cond_wait, c, m);
997   MutexUnlock(thr, pc, (uptr)m);
998   int res = REAL(pthread_cond_wait)(c, m);
999   MutexLock(thr, pc, (uptr)m);
1000   return res;
1001 }
1002 
TSAN_INTERCEPTOR(int,pthread_cond_timedwait,void * c,void * m,void * abstime)1003 TSAN_INTERCEPTOR(int, pthread_cond_timedwait, void *c, void *m, void *abstime) {
1004   SCOPED_TSAN_INTERCEPTOR(pthread_cond_timedwait, c, m, abstime);
1005   MutexUnlock(thr, pc, (uptr)m);
1006   int res = REAL(pthread_cond_timedwait)(c, m, abstime);
1007   MutexLock(thr, pc, (uptr)m);
1008   return res;
1009 }
1010 
TSAN_INTERCEPTOR(int,pthread_barrier_init,void * b,void * a,unsigned count)1011 TSAN_INTERCEPTOR(int, pthread_barrier_init, void *b, void *a, unsigned count) {
1012   SCOPED_TSAN_INTERCEPTOR(pthread_barrier_init, b, a, count);
1013   MemoryWrite(thr, pc, (uptr)b, kSizeLog1);
1014   int res = REAL(pthread_barrier_init)(b, a, count);
1015   return res;
1016 }
1017 
TSAN_INTERCEPTOR(int,pthread_barrier_destroy,void * b)1018 TSAN_INTERCEPTOR(int, pthread_barrier_destroy, void *b) {
1019   SCOPED_TSAN_INTERCEPTOR(pthread_barrier_destroy, b);
1020   MemoryWrite(thr, pc, (uptr)b, kSizeLog1);
1021   int res = REAL(pthread_barrier_destroy)(b);
1022   return res;
1023 }
1024 
TSAN_INTERCEPTOR(int,pthread_barrier_wait,void * b)1025 TSAN_INTERCEPTOR(int, pthread_barrier_wait, void *b) {
1026   SCOPED_TSAN_INTERCEPTOR(pthread_barrier_wait, b);
1027   Release(thr, pc, (uptr)b);
1028   MemoryRead(thr, pc, (uptr)b, kSizeLog1);
1029   int res = REAL(pthread_barrier_wait)(b);
1030   MemoryRead(thr, pc, (uptr)b, kSizeLog1);
1031   if (res == 0 || res == PTHREAD_BARRIER_SERIAL_THREAD) {
1032     Acquire(thr, pc, (uptr)b);
1033   }
1034   return res;
1035 }
1036 
TSAN_INTERCEPTOR(int,pthread_once,void * o,void (* f)())1037 TSAN_INTERCEPTOR(int, pthread_once, void *o, void (*f)()) {
1038   SCOPED_TSAN_INTERCEPTOR(pthread_once, o, f);
1039   if (o == 0 || f == 0)
1040     return EINVAL;
1041   atomic_uint32_t *a = static_cast<atomic_uint32_t*>(o);
1042   u32 v = atomic_load(a, memory_order_acquire);
1043   if (v == 0 && atomic_compare_exchange_strong(a, &v, 1,
1044                                                memory_order_relaxed)) {
1045     const int old_in_rtl = thr->in_rtl;
1046     thr->in_rtl = 0;
1047     (*f)();
1048     CHECK_EQ(thr->in_rtl, 0);
1049     thr->in_rtl = old_in_rtl;
1050     Release(thr, pc, (uptr)o);
1051     atomic_store(a, 2, memory_order_release);
1052   } else {
1053     while (v != 2) {
1054       pthread_yield();
1055       v = atomic_load(a, memory_order_acquire);
1056     }
1057     Acquire(thr, pc, (uptr)o);
1058   }
1059   return 0;
1060 }
1061 
TSAN_INTERCEPTOR(int,sem_init,void * s,int pshared,unsigned value)1062 TSAN_INTERCEPTOR(int, sem_init, void *s, int pshared, unsigned value) {
1063   SCOPED_TSAN_INTERCEPTOR(sem_init, s, pshared, value);
1064   int res = REAL(sem_init)(s, pshared, value);
1065   return res;
1066 }
1067 
TSAN_INTERCEPTOR(int,sem_destroy,void * s)1068 TSAN_INTERCEPTOR(int, sem_destroy, void *s) {
1069   SCOPED_TSAN_INTERCEPTOR(sem_destroy, s);
1070   int res = REAL(sem_destroy)(s);
1071   return res;
1072 }
1073 
TSAN_INTERCEPTOR(int,sem_wait,void * s)1074 TSAN_INTERCEPTOR(int, sem_wait, void *s) {
1075   SCOPED_TSAN_INTERCEPTOR(sem_wait, s);
1076   int res = BLOCK_REAL(sem_wait)(s);
1077   if (res == 0) {
1078     Acquire(thr, pc, (uptr)s);
1079   }
1080   return res;
1081 }
1082 
TSAN_INTERCEPTOR(int,sem_trywait,void * s)1083 TSAN_INTERCEPTOR(int, sem_trywait, void *s) {
1084   SCOPED_TSAN_INTERCEPTOR(sem_trywait, s);
1085   int res = BLOCK_REAL(sem_trywait)(s);
1086   if (res == 0) {
1087     Acquire(thr, pc, (uptr)s);
1088   }
1089   return res;
1090 }
1091 
TSAN_INTERCEPTOR(int,sem_timedwait,void * s,void * abstime)1092 TSAN_INTERCEPTOR(int, sem_timedwait, void *s, void *abstime) {
1093   SCOPED_TSAN_INTERCEPTOR(sem_timedwait, s, abstime);
1094   int res = BLOCK_REAL(sem_timedwait)(s, abstime);
1095   if (res == 0) {
1096     Acquire(thr, pc, (uptr)s);
1097   }
1098   return res;
1099 }
1100 
TSAN_INTERCEPTOR(int,sem_post,void * s)1101 TSAN_INTERCEPTOR(int, sem_post, void *s) {
1102   SCOPED_TSAN_INTERCEPTOR(sem_post, s);
1103   Release(thr, pc, (uptr)s);
1104   int res = REAL(sem_post)(s);
1105   return res;
1106 }
1107 
TSAN_INTERCEPTOR(int,sem_getvalue,void * s,int * sval)1108 TSAN_INTERCEPTOR(int, sem_getvalue, void *s, int *sval) {
1109   SCOPED_TSAN_INTERCEPTOR(sem_getvalue, s, sval);
1110   int res = REAL(sem_getvalue)(s, sval);
1111   if (res == 0) {
1112     Acquire(thr, pc, (uptr)s);
1113   }
1114   return res;
1115 }
1116 
TSAN_INTERCEPTOR(int,__xstat,int version,const char * path,void * buf)1117 TSAN_INTERCEPTOR(int, __xstat, int version, const char *path, void *buf) {
1118   SCOPED_TSAN_INTERCEPTOR(__xstat, version, path, buf);
1119   return REAL(__xstat)(version, path, buf);
1120 }
1121 
TSAN_INTERCEPTOR(int,stat,const char * path,void * buf)1122 TSAN_INTERCEPTOR(int, stat, const char *path, void *buf) {
1123   SCOPED_TSAN_INTERCEPTOR(__xstat, 0, path, buf);
1124   return REAL(__xstat)(0, path, buf);
1125 }
1126 
TSAN_INTERCEPTOR(int,__xstat64,int version,const char * path,void * buf)1127 TSAN_INTERCEPTOR(int, __xstat64, int version, const char *path, void *buf) {
1128   SCOPED_TSAN_INTERCEPTOR(__xstat64, version, path, buf);
1129   return REAL(__xstat64)(version, path, buf);
1130 }
1131 
TSAN_INTERCEPTOR(int,stat64,const char * path,void * buf)1132 TSAN_INTERCEPTOR(int, stat64, const char *path, void *buf) {
1133   SCOPED_TSAN_INTERCEPTOR(__xstat64, 0, path, buf);
1134   return REAL(__xstat64)(0, path, buf);
1135 }
1136 
TSAN_INTERCEPTOR(int,__lxstat,int version,const char * path,void * buf)1137 TSAN_INTERCEPTOR(int, __lxstat, int version, const char *path, void *buf) {
1138   SCOPED_TSAN_INTERCEPTOR(__lxstat, version, path, buf);
1139   return REAL(__lxstat)(version, path, buf);
1140 }
1141 
TSAN_INTERCEPTOR(int,lstat,const char * path,void * buf)1142 TSAN_INTERCEPTOR(int, lstat, const char *path, void *buf) {
1143   SCOPED_TSAN_INTERCEPTOR(__lxstat, 0, path, buf);
1144   return REAL(__lxstat)(0, path, buf);
1145 }
1146 
TSAN_INTERCEPTOR(int,__lxstat64,int version,const char * path,void * buf)1147 TSAN_INTERCEPTOR(int, __lxstat64, int version, const char *path, void *buf) {
1148   SCOPED_TSAN_INTERCEPTOR(__lxstat64, version, path, buf);
1149   return REAL(__lxstat64)(version, path, buf);
1150 }
1151 
TSAN_INTERCEPTOR(int,lstat64,const char * path,void * buf)1152 TSAN_INTERCEPTOR(int, lstat64, const char *path, void *buf) {
1153   SCOPED_TSAN_INTERCEPTOR(__lxstat64, 0, path, buf);
1154   return REAL(__lxstat64)(0, path, buf);
1155 }
1156 
TSAN_INTERCEPTOR(int,__fxstat,int version,int fd,void * buf)1157 TSAN_INTERCEPTOR(int, __fxstat, int version, int fd, void *buf) {
1158   SCOPED_TSAN_INTERCEPTOR(__fxstat, version, fd, buf);
1159   if (fd > 0)
1160     FdAccess(thr, pc, fd);
1161   return REAL(__fxstat)(version, fd, buf);
1162 }
1163 
TSAN_INTERCEPTOR(int,fstat,int fd,void * buf)1164 TSAN_INTERCEPTOR(int, fstat, int fd, void *buf) {
1165   SCOPED_TSAN_INTERCEPTOR(__fxstat, 0, fd, buf);
1166   if (fd > 0)
1167     FdAccess(thr, pc, fd);
1168   return REAL(__fxstat)(0, fd, buf);
1169 }
1170 
TSAN_INTERCEPTOR(int,__fxstat64,int version,int fd,void * buf)1171 TSAN_INTERCEPTOR(int, __fxstat64, int version, int fd, void *buf) {
1172   SCOPED_TSAN_INTERCEPTOR(__fxstat64, version, fd, buf);
1173   if (fd > 0)
1174     FdAccess(thr, pc, fd);
1175   return REAL(__fxstat64)(version, fd, buf);
1176 }
1177 
TSAN_INTERCEPTOR(int,fstat64,int fd,void * buf)1178 TSAN_INTERCEPTOR(int, fstat64, int fd, void *buf) {
1179   SCOPED_TSAN_INTERCEPTOR(__fxstat64, 0, fd, buf);
1180   if (fd > 0)
1181     FdAccess(thr, pc, fd);
1182   return REAL(__fxstat64)(0, fd, buf);
1183 }
1184 
TSAN_INTERCEPTOR(int,open,const char * name,int flags,int mode)1185 TSAN_INTERCEPTOR(int, open, const char *name, int flags, int mode) {
1186   SCOPED_TSAN_INTERCEPTOR(open, name, flags, mode);
1187   int fd = REAL(open)(name, flags, mode);
1188   if (fd >= 0)
1189     FdFileCreate(thr, pc, fd);
1190   return fd;
1191 }
1192 
TSAN_INTERCEPTOR(int,open64,const char * name,int flags,int mode)1193 TSAN_INTERCEPTOR(int, open64, const char *name, int flags, int mode) {
1194   SCOPED_TSAN_INTERCEPTOR(open64, name, flags, mode);
1195   int fd = REAL(open64)(name, flags, mode);
1196   if (fd >= 0)
1197     FdFileCreate(thr, pc, fd);
1198   return fd;
1199 }
1200 
TSAN_INTERCEPTOR(int,creat,const char * name,int mode)1201 TSAN_INTERCEPTOR(int, creat, const char *name, int mode) {
1202   SCOPED_TSAN_INTERCEPTOR(creat, name, mode);
1203   int fd = REAL(creat)(name, mode);
1204   if (fd >= 0)
1205     FdFileCreate(thr, pc, fd);
1206   return fd;
1207 }
1208 
TSAN_INTERCEPTOR(int,creat64,const char * name,int mode)1209 TSAN_INTERCEPTOR(int, creat64, const char *name, int mode) {
1210   SCOPED_TSAN_INTERCEPTOR(creat64, name, mode);
1211   int fd = REAL(creat64)(name, mode);
1212   if (fd >= 0)
1213     FdFileCreate(thr, pc, fd);
1214   return fd;
1215 }
1216 
TSAN_INTERCEPTOR(int,dup,int oldfd)1217 TSAN_INTERCEPTOR(int, dup, int oldfd) {
1218   SCOPED_TSAN_INTERCEPTOR(dup, oldfd);
1219   int newfd = REAL(dup)(oldfd);
1220   if (oldfd >= 0 && newfd >= 0 && newfd != oldfd)
1221     FdDup(thr, pc, oldfd, newfd);
1222   return newfd;
1223 }
1224 
TSAN_INTERCEPTOR(int,dup2,int oldfd,int newfd)1225 TSAN_INTERCEPTOR(int, dup2, int oldfd, int newfd) {
1226   SCOPED_TSAN_INTERCEPTOR(dup2, oldfd, newfd);
1227   int newfd2 = REAL(dup2)(oldfd, newfd);
1228   if (oldfd >= 0 && newfd2 >= 0 && newfd2 != oldfd)
1229     FdDup(thr, pc, oldfd, newfd2);
1230   return newfd2;
1231 }
1232 
TSAN_INTERCEPTOR(int,dup3,int oldfd,int newfd,int flags)1233 TSAN_INTERCEPTOR(int, dup3, int oldfd, int newfd, int flags) {
1234   SCOPED_TSAN_INTERCEPTOR(dup3, oldfd, newfd, flags);
1235   int newfd2 = REAL(dup3)(oldfd, newfd, flags);
1236   if (oldfd >= 0 && newfd2 >= 0 && newfd2 != oldfd)
1237     FdDup(thr, pc, oldfd, newfd2);
1238   return newfd2;
1239 }
1240 
TSAN_INTERCEPTOR(int,eventfd,unsigned initval,int flags)1241 TSAN_INTERCEPTOR(int, eventfd, unsigned initval, int flags) {
1242   SCOPED_TSAN_INTERCEPTOR(eventfd, initval, flags);
1243   int fd = REAL(eventfd)(initval, flags);
1244   if (fd >= 0)
1245     FdEventCreate(thr, pc, fd);
1246   return fd;
1247 }
1248 
TSAN_INTERCEPTOR(int,signalfd,int fd,void * mask,int flags)1249 TSAN_INTERCEPTOR(int, signalfd, int fd, void *mask, int flags) {
1250   SCOPED_TSAN_INTERCEPTOR(signalfd, fd, mask, flags);
1251   if (fd >= 0)
1252     FdClose(thr, pc, fd);
1253   fd = REAL(signalfd)(fd, mask, flags);
1254   if (fd >= 0)
1255     FdSignalCreate(thr, pc, fd);
1256   return fd;
1257 }
1258 
TSAN_INTERCEPTOR(int,inotify_init,int fake)1259 TSAN_INTERCEPTOR(int, inotify_init, int fake) {
1260   SCOPED_TSAN_INTERCEPTOR(inotify_init, fake);
1261   int fd = REAL(inotify_init)(fake);
1262   if (fd >= 0)
1263     FdInotifyCreate(thr, pc, fd);
1264   return fd;
1265 }
1266 
TSAN_INTERCEPTOR(int,inotify_init1,int flags)1267 TSAN_INTERCEPTOR(int, inotify_init1, int flags) {
1268   SCOPED_TSAN_INTERCEPTOR(inotify_init1, flags);
1269   int fd = REAL(inotify_init1)(flags);
1270   if (fd >= 0)
1271     FdInotifyCreate(thr, pc, fd);
1272   return fd;
1273 }
1274 
TSAN_INTERCEPTOR(int,socket,int domain,int type,int protocol)1275 TSAN_INTERCEPTOR(int, socket, int domain, int type, int protocol) {
1276   SCOPED_TSAN_INTERCEPTOR(socket, domain, type, protocol);
1277   int fd = REAL(socket)(domain, type, protocol);
1278   if (fd >= 0)
1279     FdSocketCreate(thr, pc, fd);
1280   return fd;
1281 }
1282 
TSAN_INTERCEPTOR(int,socketpair,int domain,int type,int protocol,int * fd)1283 TSAN_INTERCEPTOR(int, socketpair, int domain, int type, int protocol, int *fd) {
1284   SCOPED_TSAN_INTERCEPTOR(socketpair, domain, type, protocol, fd);
1285   int res = REAL(socketpair)(domain, type, protocol, fd);
1286   if (res == 0 && fd[0] >= 0 && fd[1] >= 0)
1287     FdPipeCreate(thr, pc, fd[0], fd[1]);
1288   return res;
1289 }
1290 
TSAN_INTERCEPTOR(int,connect,int fd,void * addr,unsigned addrlen)1291 TSAN_INTERCEPTOR(int, connect, int fd, void *addr, unsigned addrlen) {
1292   SCOPED_TSAN_INTERCEPTOR(connect, fd, addr, addrlen);
1293   FdSocketConnecting(thr, pc, fd);
1294   int res = REAL(connect)(fd, addr, addrlen);
1295   if (res == 0 && fd >= 0)
1296     FdSocketConnect(thr, pc, fd);
1297   return res;
1298 }
1299 
TSAN_INTERCEPTOR(int,bind,int fd,void * addr,unsigned addrlen)1300 TSAN_INTERCEPTOR(int, bind, int fd, void *addr, unsigned addrlen) {
1301   SCOPED_TSAN_INTERCEPTOR(bind, fd, addr, addrlen);
1302   int res = REAL(bind)(fd, addr, addrlen);
1303   if (fd > 0 && res == 0)
1304     FdAccess(thr, pc, fd);
1305   return res;
1306 }
1307 
TSAN_INTERCEPTOR(int,listen,int fd,int backlog)1308 TSAN_INTERCEPTOR(int, listen, int fd, int backlog) {
1309   SCOPED_TSAN_INTERCEPTOR(listen, fd, backlog);
1310   int res = REAL(listen)(fd, backlog);
1311   if (fd > 0 && res == 0)
1312     FdAccess(thr, pc, fd);
1313   return res;
1314 }
1315 
TSAN_INTERCEPTOR(int,accept,int fd,void * addr,unsigned * addrlen)1316 TSAN_INTERCEPTOR(int, accept, int fd, void *addr, unsigned *addrlen) {
1317   SCOPED_TSAN_INTERCEPTOR(accept, fd, addr, addrlen);
1318   int fd2 = REAL(accept)(fd, addr, addrlen);
1319   if (fd >= 0 && fd2 >= 0)
1320     FdSocketAccept(thr, pc, fd, fd2);
1321   return fd2;
1322 }
1323 
TSAN_INTERCEPTOR(int,accept4,int fd,void * addr,unsigned * addrlen,int f)1324 TSAN_INTERCEPTOR(int, accept4, int fd, void *addr, unsigned *addrlen, int f) {
1325   SCOPED_TSAN_INTERCEPTOR(accept4, fd, addr, addrlen, f);
1326   int fd2 = REAL(accept4)(fd, addr, addrlen, f);
1327   if (fd >= 0 && fd2 >= 0)
1328     FdSocketAccept(thr, pc, fd, fd2);
1329   return fd2;
1330 }
1331 
TSAN_INTERCEPTOR(int,epoll_create,int size)1332 TSAN_INTERCEPTOR(int, epoll_create, int size) {
1333   SCOPED_TSAN_INTERCEPTOR(epoll_create, size);
1334   int fd = REAL(epoll_create)(size);
1335   if (fd >= 0)
1336     FdPollCreate(thr, pc, fd);
1337   return fd;
1338 }
1339 
TSAN_INTERCEPTOR(int,epoll_create1,int flags)1340 TSAN_INTERCEPTOR(int, epoll_create1, int flags) {
1341   SCOPED_TSAN_INTERCEPTOR(epoll_create1, flags);
1342   int fd = REAL(epoll_create1)(flags);
1343   if (fd >= 0)
1344     FdPollCreate(thr, pc, fd);
1345   return fd;
1346 }
1347 
TSAN_INTERCEPTOR(int,close,int fd)1348 TSAN_INTERCEPTOR(int, close, int fd) {
1349   SCOPED_TSAN_INTERCEPTOR(close, fd);
1350   if (fd >= 0)
1351     FdClose(thr, pc, fd);
1352   return REAL(close)(fd);
1353 }
1354 
TSAN_INTERCEPTOR(int,__close,int fd)1355 TSAN_INTERCEPTOR(int, __close, int fd) {
1356   SCOPED_TSAN_INTERCEPTOR(__close, fd);
1357   if (fd >= 0)
1358     FdClose(thr, pc, fd);
1359   return REAL(__close)(fd);
1360 }
1361 
1362 // glibc guts
TSAN_INTERCEPTOR(void,__res_iclose,void * state,bool free_addr)1363 TSAN_INTERCEPTOR(void, __res_iclose, void *state, bool free_addr) {
1364   SCOPED_TSAN_INTERCEPTOR(__res_iclose, state, free_addr);
1365   int fds[64];
1366   int cnt = ExtractResolvFDs(state, fds, ARRAY_SIZE(fds));
1367   for (int i = 0; i < cnt; i++) {
1368     if (fds[i] > 0)
1369       FdClose(thr, pc, fds[i]);
1370   }
1371   REAL(__res_iclose)(state, free_addr);
1372 }
1373 
TSAN_INTERCEPTOR(int,pipe,int * pipefd)1374 TSAN_INTERCEPTOR(int, pipe, int *pipefd) {
1375   SCOPED_TSAN_INTERCEPTOR(pipe, pipefd);
1376   int res = REAL(pipe)(pipefd);
1377   if (res == 0 && pipefd[0] >= 0 && pipefd[1] >= 0)
1378     FdPipeCreate(thr, pc, pipefd[0], pipefd[1]);
1379   return res;
1380 }
1381 
TSAN_INTERCEPTOR(int,pipe2,int * pipefd,int flags)1382 TSAN_INTERCEPTOR(int, pipe2, int *pipefd, int flags) {
1383   SCOPED_TSAN_INTERCEPTOR(pipe2, pipefd, flags);
1384   int res = REAL(pipe2)(pipefd, flags);
1385   if (res == 0 && pipefd[0] >= 0 && pipefd[1] >= 0)
1386     FdPipeCreate(thr, pc, pipefd[0], pipefd[1]);
1387   return res;
1388 }
1389 
TSAN_INTERCEPTOR(long_t,readv,int fd,void * vec,int cnt)1390 TSAN_INTERCEPTOR(long_t, readv, int fd, void *vec, int cnt) {
1391   SCOPED_TSAN_INTERCEPTOR(readv, fd, vec, cnt);
1392   int res = REAL(readv)(fd, vec, cnt);
1393   if (res >= 0 && fd >= 0) {
1394     FdAcquire(thr, pc, fd);
1395   }
1396   return res;
1397 }
1398 
TSAN_INTERCEPTOR(long_t,preadv64,int fd,void * vec,int cnt,u64 off)1399 TSAN_INTERCEPTOR(long_t, preadv64, int fd, void *vec, int cnt, u64 off) {
1400   SCOPED_TSAN_INTERCEPTOR(preadv64, fd, vec, cnt, off);
1401   int res = REAL(preadv64)(fd, vec, cnt, off);
1402   if (res >= 0 && fd >= 0) {
1403     FdAcquire(thr, pc, fd);
1404   }
1405   return res;
1406 }
1407 
TSAN_INTERCEPTOR(long_t,writev,int fd,void * vec,int cnt)1408 TSAN_INTERCEPTOR(long_t, writev, int fd, void *vec, int cnt) {
1409   SCOPED_TSAN_INTERCEPTOR(writev, fd, vec, cnt);
1410   if (fd >= 0)
1411     FdRelease(thr, pc, fd);
1412   int res = REAL(writev)(fd, vec, cnt);
1413   return res;
1414 }
1415 
TSAN_INTERCEPTOR(long_t,pwritev64,int fd,void * vec,int cnt,u64 off)1416 TSAN_INTERCEPTOR(long_t, pwritev64, int fd, void *vec, int cnt, u64 off) {
1417   SCOPED_TSAN_INTERCEPTOR(pwritev64, fd, vec, cnt, off);
1418   if (fd >= 0)
1419     FdRelease(thr, pc, fd);
1420   int res = REAL(pwritev64)(fd, vec, cnt, off);
1421   return res;
1422 }
1423 
TSAN_INTERCEPTOR(long_t,send,int fd,void * buf,long_t len,int flags)1424 TSAN_INTERCEPTOR(long_t, send, int fd, void *buf, long_t len, int flags) {
1425   SCOPED_TSAN_INTERCEPTOR(send, fd, buf, len, flags);
1426   if (fd >= 0)
1427     FdRelease(thr, pc, fd);
1428   int res = REAL(send)(fd, buf, len, flags);
1429   return res;
1430 }
1431 
TSAN_INTERCEPTOR(long_t,sendmsg,int fd,void * msg,int flags)1432 TSAN_INTERCEPTOR(long_t, sendmsg, int fd, void *msg, int flags) {
1433   SCOPED_TSAN_INTERCEPTOR(sendmsg, fd, msg, flags);
1434   if (fd >= 0)
1435     FdRelease(thr, pc, fd);
1436   int res = REAL(sendmsg)(fd, msg, flags);
1437   return res;
1438 }
1439 
TSAN_INTERCEPTOR(long_t,recv,int fd,void * buf,long_t len,int flags)1440 TSAN_INTERCEPTOR(long_t, recv, int fd, void *buf, long_t len, int flags) {
1441   SCOPED_TSAN_INTERCEPTOR(recv, fd, buf, len, flags);
1442   int res = REAL(recv)(fd, buf, len, flags);
1443   if (res >= 0 && fd >= 0) {
1444     FdAcquire(thr, pc, fd);
1445   }
1446   return res;
1447 }
1448 
TSAN_INTERCEPTOR(long_t,recvmsg,int fd,void * msg,int flags)1449 TSAN_INTERCEPTOR(long_t, recvmsg, int fd, void *msg, int flags) {
1450   SCOPED_TSAN_INTERCEPTOR(recvmsg, fd, msg, flags);
1451   int res = REAL(recvmsg)(fd, msg, flags);
1452   if (res >= 0 && fd >= 0) {
1453     FdAcquire(thr, pc, fd);
1454   }
1455   return res;
1456 }
1457 
TSAN_INTERCEPTOR(int,unlink,char * path)1458 TSAN_INTERCEPTOR(int, unlink, char *path) {
1459   SCOPED_TSAN_INTERCEPTOR(unlink, path);
1460   Release(thr, pc, File2addr(path));
1461   int res = REAL(unlink)(path);
1462   return res;
1463 }
1464 
TSAN_INTERCEPTOR(void *,fopen,char * path,char * mode)1465 TSAN_INTERCEPTOR(void*, fopen, char *path, char *mode) {
1466   SCOPED_TSAN_INTERCEPTOR(fopen, path, mode);
1467   void *res = REAL(fopen)(path, mode);
1468   Acquire(thr, pc, File2addr(path));
1469   if (res) {
1470     int fd = fileno_unlocked(res);
1471     if (fd >= 0)
1472       FdFileCreate(thr, pc, fd);
1473   }
1474   return res;
1475 }
1476 
TSAN_INTERCEPTOR(void *,freopen,char * path,char * mode,void * stream)1477 TSAN_INTERCEPTOR(void*, freopen, char *path, char *mode, void *stream) {
1478   SCOPED_TSAN_INTERCEPTOR(freopen, path, mode, stream);
1479   if (stream) {
1480     int fd = fileno_unlocked(stream);
1481     if (fd >= 0)
1482       FdClose(thr, pc, fd);
1483   }
1484   void *res = REAL(freopen)(path, mode, stream);
1485   Acquire(thr, pc, File2addr(path));
1486   if (res) {
1487     int fd = fileno_unlocked(res);
1488     if (fd >= 0)
1489       FdFileCreate(thr, pc, fd);
1490   }
1491   return res;
1492 }
1493 
TSAN_INTERCEPTOR(int,fclose,void * stream)1494 TSAN_INTERCEPTOR(int, fclose, void *stream) {
1495   {
1496     SCOPED_TSAN_INTERCEPTOR(fclose, stream);
1497     if (stream) {
1498       int fd = fileno_unlocked(stream);
1499       if (fd >= 0)
1500         FdClose(thr, pc, fd);
1501     }
1502   }
1503   return REAL(fclose)(stream);
1504 }
1505 
TSAN_INTERCEPTOR(uptr,fread,void * ptr,uptr size,uptr nmemb,void * f)1506 TSAN_INTERCEPTOR(uptr, fread, void *ptr, uptr size, uptr nmemb, void *f) {
1507   {
1508     SCOPED_TSAN_INTERCEPTOR(fread, ptr, size, nmemb, f);
1509     MemoryAccessRange(thr, pc, (uptr)ptr, size * nmemb, true);
1510   }
1511   return REAL(fread)(ptr, size, nmemb, f);
1512 }
1513 
TSAN_INTERCEPTOR(uptr,fwrite,const void * p,uptr size,uptr nmemb,void * f)1514 TSAN_INTERCEPTOR(uptr, fwrite, const void *p, uptr size, uptr nmemb, void *f) {
1515   {
1516     SCOPED_TSAN_INTERCEPTOR(fwrite, p, size, nmemb, f);
1517     MemoryAccessRange(thr, pc, (uptr)p, size * nmemb, false);
1518   }
1519   return REAL(fwrite)(p, size, nmemb, f);
1520 }
1521 
TSAN_INTERCEPTOR(int,puts,const char * s)1522 TSAN_INTERCEPTOR(int, puts, const char *s) {
1523   SCOPED_TSAN_INTERCEPTOR(puts, s);
1524   MemoryAccessRange(thr, pc, (uptr)s, internal_strlen(s), false);
1525   return REAL(puts)(s);
1526 }
1527 
TSAN_INTERCEPTOR(int,rmdir,char * path)1528 TSAN_INTERCEPTOR(int, rmdir, char *path) {
1529   SCOPED_TSAN_INTERCEPTOR(rmdir, path);
1530   Release(thr, pc, Dir2addr(path));
1531   int res = REAL(rmdir)(path);
1532   return res;
1533 }
1534 
TSAN_INTERCEPTOR(void *,opendir,char * path)1535 TSAN_INTERCEPTOR(void*, opendir, char *path) {
1536   SCOPED_TSAN_INTERCEPTOR(opendir, path);
1537   void *res = REAL(opendir)(path);
1538   if (res != 0)
1539     Acquire(thr, pc, Dir2addr(path));
1540   return res;
1541 }
1542 
TSAN_INTERCEPTOR(int,epoll_ctl,int epfd,int op,int fd,void * ev)1543 TSAN_INTERCEPTOR(int, epoll_ctl, int epfd, int op, int fd, void *ev) {
1544   SCOPED_TSAN_INTERCEPTOR(epoll_ctl, epfd, op, fd, ev);
1545   if (op == EPOLL_CTL_ADD && epfd >= 0) {
1546     FdRelease(thr, pc, epfd);
1547   }
1548   int res = REAL(epoll_ctl)(epfd, op, fd, ev);
1549   if (fd >= 0)
1550     FdAccess(thr, pc, fd);
1551   return res;
1552 }
1553 
TSAN_INTERCEPTOR(int,epoll_wait,int epfd,void * ev,int cnt,int timeout)1554 TSAN_INTERCEPTOR(int, epoll_wait, int epfd, void *ev, int cnt, int timeout) {
1555   SCOPED_TSAN_INTERCEPTOR(epoll_wait, epfd, ev, cnt, timeout);
1556   int res = BLOCK_REAL(epoll_wait)(epfd, ev, cnt, timeout);
1557   if (res > 0 && epfd >= 0) {
1558     FdAcquire(thr, pc, epfd);
1559   }
1560   return res;
1561 }
1562 
TSAN_INTERCEPTOR(int,poll,void * fds,long_t nfds,int timeout)1563 TSAN_INTERCEPTOR(int, poll, void *fds, long_t nfds, int timeout) {
1564   SCOPED_TSAN_INTERCEPTOR(poll, fds, nfds, timeout);
1565   int res = BLOCK_REAL(poll)(fds, nfds, timeout);
1566   return res;
1567 }
1568 
rtl_generic_sighandler(bool sigact,int sig,my_siginfo_t * info,void * ctx)1569 static void ALWAYS_INLINE rtl_generic_sighandler(bool sigact, int sig,
1570     my_siginfo_t *info, void *ctx) {
1571   ThreadState *thr = cur_thread();
1572   SignalContext *sctx = SigCtx(thr);
1573   // Don't mess with synchronous signals.
1574   if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL ||
1575       sig == SIGABRT || sig == SIGFPE || sig == SIGPIPE ||
1576       // If we are sending signal to ourselves, we must process it now.
1577       (sctx && sig == sctx->int_signal_send) ||
1578       // If we are in blocking function, we can safely process it now
1579       // (but check if we are in a recursive interceptor,
1580       // i.e. pthread_join()->munmap()).
1581       (sctx && sctx->in_blocking_func == 1 && thr->in_rtl == 1)) {
1582     CHECK(thr->in_rtl == 0 || thr->in_rtl == 1);
1583     int in_rtl = thr->in_rtl;
1584     thr->in_rtl = 0;
1585     CHECK_EQ(thr->in_signal_handler, false);
1586     thr->in_signal_handler = true;
1587     if (sigact)
1588       sigactions[sig].sa_sigaction(sig, info, ctx);
1589     else
1590       sigactions[sig].sa_handler(sig);
1591     CHECK_EQ(thr->in_signal_handler, true);
1592     thr->in_signal_handler = false;
1593     thr->in_rtl = in_rtl;
1594     return;
1595   }
1596 
1597   if (sctx == 0)
1598     return;
1599   SignalDesc *signal = &sctx->pending_signals[sig];
1600   if (signal->armed == false) {
1601     signal->armed = true;
1602     signal->sigaction = sigact;
1603     if (info)
1604       internal_memcpy(&signal->siginfo, info, sizeof(*info));
1605     if (ctx)
1606       internal_memcpy(&signal->ctx, ctx, sizeof(signal->ctx));
1607     sctx->pending_signal_count++;
1608   }
1609 }
1610 
rtl_sighandler(int sig)1611 static void rtl_sighandler(int sig) {
1612   rtl_generic_sighandler(false, sig, 0, 0);
1613 }
1614 
rtl_sigaction(int sig,my_siginfo_t * info,void * ctx)1615 static void rtl_sigaction(int sig, my_siginfo_t *info, void *ctx) {
1616   rtl_generic_sighandler(true, sig, info, ctx);
1617 }
1618 
TSAN_INTERCEPTOR(int,sigaction,int sig,sigaction_t * act,sigaction_t * old)1619 TSAN_INTERCEPTOR(int, sigaction, int sig, sigaction_t *act, sigaction_t *old) {
1620   SCOPED_TSAN_INTERCEPTOR(sigaction, sig, act, old);
1621   if (old)
1622     internal_memcpy(old, &sigactions[sig], sizeof(*old));
1623   if (act == 0)
1624     return 0;
1625   internal_memcpy(&sigactions[sig], act, sizeof(*act));
1626   sigaction_t newact;
1627   internal_memcpy(&newact, act, sizeof(newact));
1628   sigfillset(&newact.sa_mask);
1629   if (act->sa_handler != SIG_IGN && act->sa_handler != SIG_DFL) {
1630     if (newact.sa_flags & SA_SIGINFO)
1631       newact.sa_sigaction = rtl_sigaction;
1632     else
1633       newact.sa_handler = rtl_sighandler;
1634   }
1635   int res = REAL(sigaction)(sig, &newact, 0);
1636   return res;
1637 }
1638 
TSAN_INTERCEPTOR(sighandler_t,signal,int sig,sighandler_t h)1639 TSAN_INTERCEPTOR(sighandler_t, signal, int sig, sighandler_t h) {
1640   sigaction_t act;
1641   act.sa_handler = h;
1642   REAL(memset)(&act.sa_mask, -1, sizeof(act.sa_mask));
1643   act.sa_flags = 0;
1644   sigaction_t old;
1645   int res = sigaction(sig, &act, &old);
1646   if (res)
1647     return SIG_ERR;
1648   return old.sa_handler;
1649 }
1650 
TSAN_INTERCEPTOR(int,raise,int sig)1651 TSAN_INTERCEPTOR(int, raise, int sig) {
1652   SCOPED_TSAN_INTERCEPTOR(raise, sig);
1653   SignalContext *sctx = SigCtx(thr);
1654   CHECK_NE(sctx, 0);
1655   int prev = sctx->int_signal_send;
1656   sctx->int_signal_send = sig;
1657   int res = REAL(raise)(sig);
1658   CHECK_EQ(sctx->int_signal_send, sig);
1659   sctx->int_signal_send = prev;
1660   return res;
1661 }
1662 
TSAN_INTERCEPTOR(int,kill,int pid,int sig)1663 TSAN_INTERCEPTOR(int, kill, int pid, int sig) {
1664   SCOPED_TSAN_INTERCEPTOR(kill, pid, sig);
1665   SignalContext *sctx = SigCtx(thr);
1666   CHECK_NE(sctx, 0);
1667   int prev = sctx->int_signal_send;
1668   if (pid == GetPid()) {
1669     sctx->int_signal_send = sig;
1670   }
1671   int res = REAL(kill)(pid, sig);
1672   if (pid == GetPid()) {
1673     CHECK_EQ(sctx->int_signal_send, sig);
1674     sctx->int_signal_send = prev;
1675   }
1676   return res;
1677 }
1678 
TSAN_INTERCEPTOR(int,pthread_kill,void * tid,int sig)1679 TSAN_INTERCEPTOR(int, pthread_kill, void *tid, int sig) {
1680   SCOPED_TSAN_INTERCEPTOR(pthread_kill, tid, sig);
1681   SignalContext *sctx = SigCtx(thr);
1682   CHECK_NE(sctx, 0);
1683   int prev = sctx->int_signal_send;
1684   if (tid == pthread_self()) {
1685     sctx->int_signal_send = sig;
1686   }
1687   int res = REAL(pthread_kill)(tid, sig);
1688   if (tid == pthread_self()) {
1689     CHECK_EQ(sctx->int_signal_send, sig);
1690     sctx->int_signal_send = prev;
1691   }
1692   return res;
1693 }
1694 
TSAN_INTERCEPTOR(int,gettimeofday,void * tv,void * tz)1695 TSAN_INTERCEPTOR(int, gettimeofday, void *tv, void *tz) {
1696   SCOPED_TSAN_INTERCEPTOR(gettimeofday, tv, tz);
1697   // It's intercepted merely to process pending signals.
1698   return REAL(gettimeofday)(tv, tz);
1699 }
1700 
1701 // Linux kernel has a bug that leads to kernel deadlock if a process
1702 // maps TBs of memory and then calls mlock().
MlockIsUnsupported()1703 static void MlockIsUnsupported() {
1704   static atomic_uint8_t printed;
1705   if (atomic_exchange(&printed, 1, memory_order_relaxed))
1706     return;
1707   Printf("INFO: ThreadSanitizer ignores mlock/mlockall/munlock/munlockall\n");
1708 }
1709 
TSAN_INTERCEPTOR(int,mlock,const void * addr,uptr len)1710 TSAN_INTERCEPTOR(int, mlock, const void *addr, uptr len) {
1711   MlockIsUnsupported();
1712   return 0;
1713 }
1714 
TSAN_INTERCEPTOR(int,munlock,const void * addr,uptr len)1715 TSAN_INTERCEPTOR(int, munlock, const void *addr, uptr len) {
1716   MlockIsUnsupported();
1717   return 0;
1718 }
1719 
TSAN_INTERCEPTOR(int,mlockall,int flags)1720 TSAN_INTERCEPTOR(int, mlockall, int flags) {
1721   MlockIsUnsupported();
1722   return 0;
1723 }
1724 
TSAN_INTERCEPTOR(int,munlockall,void)1725 TSAN_INTERCEPTOR(int, munlockall, void) {
1726   MlockIsUnsupported();
1727   return 0;
1728 }
1729 
TSAN_INTERCEPTOR(int,fork,int fake)1730 TSAN_INTERCEPTOR(int, fork, int fake) {
1731   SCOPED_TSAN_INTERCEPTOR(fork, fake);
1732   // It's intercepted merely to process pending signals.
1733   int pid = REAL(fork)(fake);
1734   if (pid == 0) {
1735     // child
1736     FdOnFork(thr, pc);
1737   } else if (pid > 0) {
1738     // parent
1739   }
1740   return pid;
1741 }
1742 
1743 struct TsanInterceptorContext {
1744   ThreadState *thr;
1745   const uptr caller_pc;
1746   const uptr pc;
1747 };
1748 
1749 #define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \
1750     MemoryAccessRange(((TsanInterceptorContext*)ctx)->thr,  \
1751                       ((TsanInterceptorContext*)ctx)->pc,   \
1752                       (uptr)ptr, size, true)
1753 #define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size)       \
1754     MemoryAccessRange(((TsanInterceptorContext*)ctx)->thr,  \
1755                       ((TsanInterceptorContext*)ctx)->pc,   \
1756                       (uptr)ptr, size, false)
1757 #define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \
1758     SCOPED_TSAN_INTERCEPTOR(func, __VA_ARGS__) \
1759     TsanInterceptorContext _ctx = {thr, caller_pc, pc}; \
1760     ctx = (void*)&_ctx; \
1761     (void)ctx;
1762 #define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \
1763     FdAcquire(((TsanInterceptorContext*)ctx)->thr, pc, fd)
1764 #define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) \
1765     FdRelease(((TsanInterceptorContext*)ctx)->thr, pc, fd)
1766 #define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) \
1767     ThreadSetName(((TsanInterceptorContext*)ctx)->thr, name)
1768 #include "sanitizer_common/sanitizer_common_interceptors.inc"
1769 
1770 namespace __tsan {
1771 
ProcessPendingSignals(ThreadState * thr)1772 void ProcessPendingSignals(ThreadState *thr) {
1773   CHECK_EQ(thr->in_rtl, 0);
1774   SignalContext *sctx = SigCtx(thr);
1775   if (sctx == 0 || sctx->pending_signal_count == 0 || thr->in_signal_handler)
1776     return;
1777   Context *ctx = CTX();
1778   thr->in_signal_handler = true;
1779   sctx->pending_signal_count = 0;
1780   // These are too big for stack.
1781   static THREADLOCAL sigset_t emptyset, oldset;
1782   sigfillset(&emptyset);
1783   pthread_sigmask(SIG_SETMASK, &emptyset, &oldset);
1784   for (int sig = 0; sig < kSigCount; sig++) {
1785     SignalDesc *signal = &sctx->pending_signals[sig];
1786     if (signal->armed) {
1787       signal->armed = false;
1788       if (sigactions[sig].sa_handler != SIG_DFL
1789           && sigactions[sig].sa_handler != SIG_IGN) {
1790         // Insure that the handler does not spoil errno.
1791         const int saved_errno = errno;
1792         errno = 0;
1793         if (signal->sigaction)
1794           sigactions[sig].sa_sigaction(sig, &signal->siginfo, &signal->ctx);
1795         else
1796           sigactions[sig].sa_handler(sig);
1797         if (flags()->report_bugs && errno != 0) {
1798           ScopedInRtl in_rtl;
1799           __tsan::StackTrace stack;
1800           uptr pc = signal->sigaction ?
1801               (uptr)sigactions[sig].sa_sigaction :
1802               (uptr)sigactions[sig].sa_handler;
1803           stack.Init(&pc, 1);
1804           ThreadRegistryLock l(ctx->thread_registry);
1805           ScopedReport rep(ReportTypeErrnoInSignal);
1806           if (!IsFiredSuppression(ctx, rep, stack)) {
1807             rep.AddStack(&stack);
1808             OutputReport(ctx, rep, rep.GetReport()->stacks[0]);
1809           }
1810         }
1811         errno = saved_errno;
1812       }
1813     }
1814   }
1815   pthread_sigmask(SIG_SETMASK, &oldset, 0);
1816   CHECK_EQ(thr->in_signal_handler, true);
1817   thr->in_signal_handler = false;
1818 }
1819 
unreachable()1820 static void unreachable() {
1821   Printf("FATAL: ThreadSanitizer: unreachable called\n");
1822   Die();
1823 }
1824 
InitializeInterceptors()1825 void InitializeInterceptors() {
1826   CHECK_GT(cur_thread()->in_rtl, 0);
1827 
1828   // We need to setup it early, because functions like dlsym() can call it.
1829   REAL(memset) = internal_memset;
1830   REAL(memcpy) = internal_memcpy;
1831   REAL(memcmp) = internal_memcmp;
1832 
1833   SANITIZER_COMMON_INTERCEPTORS_INIT;
1834 
1835   TSAN_INTERCEPT(longjmp);
1836   TSAN_INTERCEPT(siglongjmp);
1837 
1838   TSAN_INTERCEPT(malloc);
1839   TSAN_INTERCEPT(__libc_memalign);
1840   TSAN_INTERCEPT(calloc);
1841   TSAN_INTERCEPT(realloc);
1842   TSAN_INTERCEPT(free);
1843   TSAN_INTERCEPT(cfree);
1844   TSAN_INTERCEPT(mmap);
1845   TSAN_INTERCEPT(mmap64);
1846   TSAN_INTERCEPT(munmap);
1847   TSAN_INTERCEPT(memalign);
1848   TSAN_INTERCEPT(valloc);
1849   TSAN_INTERCEPT(pvalloc);
1850   TSAN_INTERCEPT(posix_memalign);
1851 
1852   TSAN_INTERCEPT(strlen);
1853   TSAN_INTERCEPT(memset);
1854   TSAN_INTERCEPT(memcpy);
1855   TSAN_INTERCEPT(strcmp);
1856   TSAN_INTERCEPT(memchr);
1857   TSAN_INTERCEPT(memrchr);
1858   TSAN_INTERCEPT(memmove);
1859   TSAN_INTERCEPT(memcmp);
1860   TSAN_INTERCEPT(strchr);
1861   TSAN_INTERCEPT(strchrnul);
1862   TSAN_INTERCEPT(strrchr);
1863   TSAN_INTERCEPT(strncmp);
1864   TSAN_INTERCEPT(strcpy);  // NOLINT
1865   TSAN_INTERCEPT(strncpy);
1866   TSAN_INTERCEPT(strstr);
1867 
1868   TSAN_INTERCEPT(pthread_create);
1869   TSAN_INTERCEPT(pthread_join);
1870   TSAN_INTERCEPT(pthread_detach);
1871 
1872   TSAN_INTERCEPT(pthread_mutex_init);
1873   TSAN_INTERCEPT(pthread_mutex_destroy);
1874   TSAN_INTERCEPT(pthread_mutex_lock);
1875   TSAN_INTERCEPT(pthread_mutex_trylock);
1876   TSAN_INTERCEPT(pthread_mutex_timedlock);
1877   TSAN_INTERCEPT(pthread_mutex_unlock);
1878 
1879   TSAN_INTERCEPT(pthread_spin_init);
1880   TSAN_INTERCEPT(pthread_spin_destroy);
1881   TSAN_INTERCEPT(pthread_spin_lock);
1882   TSAN_INTERCEPT(pthread_spin_trylock);
1883   TSAN_INTERCEPT(pthread_spin_unlock);
1884 
1885   TSAN_INTERCEPT(pthread_rwlock_init);
1886   TSAN_INTERCEPT(pthread_rwlock_destroy);
1887   TSAN_INTERCEPT(pthread_rwlock_rdlock);
1888   TSAN_INTERCEPT(pthread_rwlock_tryrdlock);
1889   TSAN_INTERCEPT(pthread_rwlock_timedrdlock);
1890   TSAN_INTERCEPT(pthread_rwlock_wrlock);
1891   TSAN_INTERCEPT(pthread_rwlock_trywrlock);
1892   TSAN_INTERCEPT(pthread_rwlock_timedwrlock);
1893   TSAN_INTERCEPT(pthread_rwlock_unlock);
1894 
1895   // TSAN_INTERCEPT(pthread_cond_init);
1896   TSAN_INTERCEPT(pthread_cond_destroy);
1897   TSAN_INTERCEPT(pthread_cond_signal);
1898   TSAN_INTERCEPT(pthread_cond_broadcast);
1899   TSAN_INTERCEPT(pthread_cond_wait);
1900   TSAN_INTERCEPT(pthread_cond_timedwait);
1901 
1902   TSAN_INTERCEPT(pthread_barrier_init);
1903   TSAN_INTERCEPT(pthread_barrier_destroy);
1904   TSAN_INTERCEPT(pthread_barrier_wait);
1905 
1906   TSAN_INTERCEPT(pthread_once);
1907 
1908   TSAN_INTERCEPT(sem_init);
1909   TSAN_INTERCEPT(sem_destroy);
1910   TSAN_INTERCEPT(sem_wait);
1911   TSAN_INTERCEPT(sem_trywait);
1912   TSAN_INTERCEPT(sem_timedwait);
1913   TSAN_INTERCEPT(sem_post);
1914   TSAN_INTERCEPT(sem_getvalue);
1915 
1916   TSAN_INTERCEPT(stat);
1917   TSAN_INTERCEPT(__xstat);
1918   TSAN_INTERCEPT(stat64);
1919   TSAN_INTERCEPT(__xstat64);
1920   TSAN_INTERCEPT(lstat);
1921   TSAN_INTERCEPT(__lxstat);
1922   TSAN_INTERCEPT(lstat64);
1923   TSAN_INTERCEPT(__lxstat64);
1924   TSAN_INTERCEPT(fstat);
1925   TSAN_INTERCEPT(__fxstat);
1926   TSAN_INTERCEPT(fstat64);
1927   TSAN_INTERCEPT(__fxstat64);
1928   TSAN_INTERCEPT(open);
1929   TSAN_INTERCEPT(open64);
1930   TSAN_INTERCEPT(creat);
1931   TSAN_INTERCEPT(creat64);
1932   TSAN_INTERCEPT(dup);
1933   TSAN_INTERCEPT(dup2);
1934   TSAN_INTERCEPT(dup3);
1935   TSAN_INTERCEPT(eventfd);
1936   TSAN_INTERCEPT(signalfd);
1937   TSAN_INTERCEPT(inotify_init);
1938   TSAN_INTERCEPT(inotify_init1);
1939   TSAN_INTERCEPT(socket);
1940   TSAN_INTERCEPT(socketpair);
1941   TSAN_INTERCEPT(connect);
1942   TSAN_INTERCEPT(bind);
1943   TSAN_INTERCEPT(listen);
1944   TSAN_INTERCEPT(accept);
1945   TSAN_INTERCEPT(accept4);
1946   TSAN_INTERCEPT(epoll_create);
1947   TSAN_INTERCEPT(epoll_create1);
1948   TSAN_INTERCEPT(close);
1949   TSAN_INTERCEPT(__close);
1950   TSAN_INTERCEPT(__res_iclose);
1951   TSAN_INTERCEPT(pipe);
1952   TSAN_INTERCEPT(pipe2);
1953 
1954   TSAN_INTERCEPT(readv);
1955   TSAN_INTERCEPT(preadv64);
1956   TSAN_INTERCEPT(writev);
1957   TSAN_INTERCEPT(pwritev64);
1958   TSAN_INTERCEPT(send);
1959   TSAN_INTERCEPT(sendmsg);
1960   TSAN_INTERCEPT(recv);
1961   TSAN_INTERCEPT(recvmsg);
1962 
1963   TSAN_INTERCEPT(unlink);
1964   TSAN_INTERCEPT(fopen);
1965   TSAN_INTERCEPT(freopen);
1966   TSAN_INTERCEPT(fclose);
1967   TSAN_INTERCEPT(fread);
1968   TSAN_INTERCEPT(fwrite);
1969   TSAN_INTERCEPT(puts);
1970   TSAN_INTERCEPT(rmdir);
1971   TSAN_INTERCEPT(opendir);
1972 
1973   TSAN_INTERCEPT(epoll_ctl);
1974   TSAN_INTERCEPT(epoll_wait);
1975   TSAN_INTERCEPT(poll);
1976 
1977   TSAN_INTERCEPT(sigaction);
1978   TSAN_INTERCEPT(signal);
1979   TSAN_INTERCEPT(raise);
1980   TSAN_INTERCEPT(kill);
1981   TSAN_INTERCEPT(pthread_kill);
1982   TSAN_INTERCEPT(sleep);
1983   TSAN_INTERCEPT(usleep);
1984   TSAN_INTERCEPT(nanosleep);
1985   TSAN_INTERCEPT(gettimeofday);
1986 
1987   TSAN_INTERCEPT(mlock);
1988   TSAN_INTERCEPT(munlock);
1989   TSAN_INTERCEPT(mlockall);
1990   TSAN_INTERCEPT(munlockall);
1991 
1992   TSAN_INTERCEPT(fork);
1993   TSAN_INTERCEPT(on_exit);
1994   TSAN_INTERCEPT(__cxa_atexit);
1995 
1996   // Need to setup it, because interceptors check that the function is resolved.
1997   // But atexit is emitted directly into the module, so can't be resolved.
1998   REAL(atexit) = (int(*)(void(*)()))unreachable;
1999   atexit_ctx = new(internal_alloc(MBlockAtExit, sizeof(AtExitContext)))
2000       AtExitContext();
2001 
2002   if (REAL(__cxa_atexit)(&finalize, 0, 0)) {
2003     Printf("ThreadSanitizer: failed to setup atexit callback\n");
2004     Die();
2005   }
2006 
2007   if (pthread_key_create(&g_thread_finalize_key, &thread_finalize)) {
2008     Printf("ThreadSanitizer: failed to create thread key\n");
2009     Die();
2010   }
2011 
2012   FdInit();
2013 }
2014 
internal_start_thread(void (* func)(void * arg),void * arg)2015 void internal_start_thread(void(*func)(void *arg), void *arg) {
2016   void *th;
2017   REAL(pthread_create)(&th, 0, (void*(*)(void *arg))func, arg);
2018   REAL(pthread_detach)(th);
2019 }
2020 
2021 }  // namespace __tsan
2022