tsan_interceptors.cc revision c05cbca0988c296068e0da1556bd6af7edd43c69 
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_placement_new.h"
19#include "sanitizer_common/sanitizer_stacktrace.h"
20#include "interception/interception.h"
21#include "tsan_interface.h"
22#include "tsan_platform.h"
23#include "tsan_rtl.h"
24#include "tsan_mman.h"
25#include "tsan_fd.h"
26
27using namespace __tsan;  // NOLINT
28
29const int kSigCount = 128;
30
31struct my_siginfo_t {
32  int opaque[128];
33};
34
35struct sigset_t {
36  u64 val[1024 / 8 / sizeof(u64)];
37};
38
39struct ucontext_t {
40  uptr opaque[117];
41};
42
43extern "C" int pthread_attr_init(void *attr);
44extern "C" int pthread_attr_destroy(void *attr);
45extern "C" int pthread_attr_getdetachstate(void *attr, int *v);
46extern "C" int pthread_attr_setstacksize(void *attr, uptr stacksize);
47extern "C" int pthread_attr_getstacksize(void *attr, uptr *stacksize);
48extern "C" int pthread_key_create(unsigned *key, void (*destructor)(void* v));
49extern "C" int pthread_setspecific(unsigned key, const void *v);
50extern "C" int pthread_mutexattr_gettype(void *a, int *type);
51extern "C" int pthread_yield();
52extern "C" int pthread_sigmask(int how, const sigset_t *set, sigset_t *oldset);
53extern "C" int sigfillset(sigset_t *set);
54extern "C" void *pthread_self();
55extern "C" void _exit(int status);
56extern "C" int *__errno_location();
57extern "C" int fileno_unlocked(void *stream);
58extern "C" void *__libc_malloc(uptr size);
59extern "C" void *__libc_calloc(uptr size, uptr n);
60extern "C" void *__libc_realloc(void *ptr, uptr size);
61extern "C" void __libc_free(void *ptr);
62const int PTHREAD_MUTEX_RECURSIVE = 1;
63const int PTHREAD_MUTEX_RECURSIVE_NP = 1;
64const int kPthreadAttrSize = 56;
65const int EINVAL = 22;
66const int EBUSY = 16;
67const int EPOLL_CTL_ADD = 1;
68const int SIGILL = 4;
69const int SIGABRT = 6;
70const int SIGFPE = 8;
71const int SIGSEGV = 11;
72const int SIGPIPE = 13;
73const int SIGBUS = 7;
74void *const MAP_FAILED = (void*)-1;
75const int PTHREAD_BARRIER_SERIAL_THREAD = -1;
76const int MAP_FIXED = 0x10;
77typedef long long_t;  // NOLINT
78
79// From /usr/include/unistd.h
80# define F_ULOCK 0      /* Unlock a previously locked region.  */
81# define F_LOCK  1      /* Lock a region for exclusive use.  */
82# define F_TLOCK 2      /* Test and lock a region for exclusive use.  */
83# define F_TEST  3      /* Test a region for other processes locks.  */
84
85typedef void (*sighandler_t)(int sig);
86
87#define errno (*__errno_location())
88
89union pthread_attr_t {
90  char size[kPthreadAttrSize];
91  void *align;
92};
93
94struct sigaction_t {
95  union {
96    sighandler_t sa_handler;
97    void (*sa_sigaction)(int sig, my_siginfo_t *siginfo, void *uctx);
98  };
99  sigset_t sa_mask;
100  int sa_flags;
101  void (*sa_restorer)();
102};
103
104const sighandler_t SIG_DFL = (sighandler_t)0;
105const sighandler_t SIG_IGN = (sighandler_t)1;
106const sighandler_t SIG_ERR = (sighandler_t)-1;
107const int SA_SIGINFO = 4;
108const int SIG_SETMASK = 2;
109
110namespace std {
111struct nothrow_t {};
112}  // namespace std
113
114static sigaction_t sigactions[kSigCount];
115
116namespace __tsan {
117struct SignalDesc {
118  bool armed;
119  bool sigaction;
120  my_siginfo_t siginfo;
121  ucontext_t ctx;
122};
123
124struct SignalContext {
125  int in_blocking_func;
126  int int_signal_send;
127  int pending_signal_count;
128  SignalDesc pending_signals[kSigCount];
129};
130}  // namespace __tsan
131
132static SignalContext *SigCtx(ThreadState *thr) {
133  SignalContext *ctx = (SignalContext*)thr->signal_ctx;
134  if (ctx == 0 && thr->is_alive) {
135    ScopedInRtl in_rtl;
136    ctx = (SignalContext*)MmapOrDie(sizeof(*ctx), "SignalContext");
137    MemoryResetRange(thr, (uptr)&SigCtx, (uptr)ctx, sizeof(*ctx));
138    thr->signal_ctx = ctx;
139  }
140  return ctx;
141}
142
143static unsigned g_thread_finalize_key;
144
145class ScopedInterceptor {
146 public:
147  ScopedInterceptor(ThreadState *thr, const char *fname, uptr pc);
148  ~ScopedInterceptor();
149 private:
150  ThreadState *const thr_;
151  const int in_rtl_;
152};
153
154ScopedInterceptor::ScopedInterceptor(ThreadState *thr, const char *fname,
155                                     uptr pc)
156    : thr_(thr)
157    , in_rtl_(thr->in_rtl) {
158  if (thr_->in_rtl == 0) {
159    Initialize(thr);
160    FuncEntry(thr, pc);
161    thr_->in_rtl++;
162    DPrintf("#%d: intercept %s()\n", thr_->tid, fname);
163  } else {
164    thr_->in_rtl++;
165  }
166}
167
168ScopedInterceptor::~ScopedInterceptor() {
169  thr_->in_rtl--;
170  if (thr_->in_rtl == 0) {
171    FuncExit(thr_);
172    ProcessPendingSignals(thr_);
173  }
174  CHECK_EQ(in_rtl_, thr_->in_rtl);
175}
176
177#define SCOPED_INTERCEPTOR_RAW(func, ...) \
178    ThreadState *thr = cur_thread(); \
179    StatInc(thr, StatInterceptor); \
180    StatInc(thr, StatInt_##func); \
181    const uptr caller_pc = GET_CALLER_PC(); \
182    ScopedInterceptor si(thr, #func, caller_pc); \
183    const uptr pc = __sanitizer::StackTrace::GetPreviousInstructionPc( \
184        __sanitizer::StackTrace::GetCurrentPc()); \
185    (void)pc; \
186/**/
187
188#define SCOPED_TSAN_INTERCEPTOR(func, ...) \
189    SCOPED_INTERCEPTOR_RAW(func, __VA_ARGS__); \
190    if (REAL(func) == 0) { \
191      Printf("FATAL: ThreadSanitizer: failed to intercept %s\n", #func); \
192      Die(); \
193    } \
194    if (thr->in_rtl > 1) \
195      return REAL(func)(__VA_ARGS__); \
196/**/
197
198#define TSAN_INTERCEPTOR(ret, func, ...) INTERCEPTOR(ret, func, __VA_ARGS__)
199#define TSAN_INTERCEPT(func) INTERCEPT_FUNCTION(func)
200
201#define BLOCK_REAL(name) (BlockingCall(thr), REAL(name))
202
203struct BlockingCall {
204  explicit BlockingCall(ThreadState *thr)
205      : ctx(SigCtx(thr)) {
206    ctx->in_blocking_func++;
207  }
208
209  ~BlockingCall() {
210    ctx->in_blocking_func--;
211  }
212
213  SignalContext *ctx;
214};
215
216TSAN_INTERCEPTOR(unsigned, sleep, unsigned sec) {
217  SCOPED_TSAN_INTERCEPTOR(sleep, sec);
218  unsigned res = BLOCK_REAL(sleep)(sec);
219  AfterSleep(thr, pc);
220  return res;
221}
222
223TSAN_INTERCEPTOR(int, usleep, long_t usec) {
224  SCOPED_TSAN_INTERCEPTOR(usleep, usec);
225  int res = BLOCK_REAL(usleep)(usec);
226  AfterSleep(thr, pc);
227  return res;
228}
229
230TSAN_INTERCEPTOR(int, nanosleep, void *req, void *rem) {
231  SCOPED_TSAN_INTERCEPTOR(nanosleep, req, rem);
232  int res = BLOCK_REAL(nanosleep)(req, rem);
233  AfterSleep(thr, pc);
234  return res;
235}
236
237class AtExitContext {
238 public:
239  AtExitContext()
240    : mtx_(MutexTypeAtExit, StatMtxAtExit)
241    , pos_() {
242  }
243
244  typedef void(*atexit_t)();
245
246  int atexit(ThreadState *thr, uptr pc, bool is_on_exit,
247             atexit_t f, void *arg) {
248    Lock l(&mtx_);
249    if (pos_ == kMaxAtExit)
250      return 1;
251    Release(thr, pc, (uptr)this);
252    stack_[pos_] = f;
253    args_[pos_] = arg;
254    is_on_exits_[pos_] = is_on_exit;
255    pos_++;
256    return 0;
257  }
258
259  void exit(ThreadState *thr, uptr pc) {
260    CHECK_EQ(thr->in_rtl, 0);
261    for (;;) {
262      atexit_t f = 0;
263      void *arg = 0;
264      bool is_on_exit = false;
265      {
266        Lock l(&mtx_);
267        if (pos_) {
268          pos_--;
269          f = stack_[pos_];
270          arg = args_[pos_];
271          is_on_exit = is_on_exits_[pos_];
272          ScopedInRtl in_rtl;
273          Acquire(thr, pc, (uptr)this);
274        }
275      }
276      if (f == 0)
277        break;
278      DPrintf("#%d: executing atexit func %p\n", thr->tid, f);
279      CHECK_EQ(thr->in_rtl, 0);
280      if (is_on_exit)
281        ((void(*)(int status, void *arg))f)(0, arg);
282      else
283        ((void(*)(void *arg, void *dso))f)(arg, 0);
284    }
285  }
286
287 private:
288  static const int kMaxAtExit = 128;
289  Mutex mtx_;
290  atexit_t stack_[kMaxAtExit];
291  void *args_[kMaxAtExit];
292  bool is_on_exits_[kMaxAtExit];
293  int pos_;
294};
295
296static AtExitContext *atexit_ctx;
297
298static void finalize(void *arg) {
299  ThreadState * thr = cur_thread();
300  uptr pc = 0;
301  atexit_ctx->exit(thr, pc);
302  int status = Finalize(cur_thread());
303  if (status)
304    _exit(status);
305}
306
307TSAN_INTERCEPTOR(int, atexit, void (*f)()) {
308  if (cur_thread()->in_symbolizer)
309    return 0;
310  SCOPED_TSAN_INTERCEPTOR(atexit, f);
311  return atexit_ctx->atexit(thr, pc, false, (void(*)())f, 0);
312}
313
314TSAN_INTERCEPTOR(int, on_exit, void(*f)(int, void*), void *arg) {
315  if (cur_thread()->in_symbolizer)
316    return 0;
317  SCOPED_TSAN_INTERCEPTOR(on_exit, f, arg);
318  return atexit_ctx->atexit(thr, pc, true, (void(*)())f, arg);
319}
320
321TSAN_INTERCEPTOR(int, __cxa_atexit, void (*f)(void *a), void *arg, void *dso) {
322  if (cur_thread()->in_symbolizer)
323    return 0;
324  SCOPED_TSAN_INTERCEPTOR(__cxa_atexit, f, arg, dso);
325  if (dso)
326    return REAL(__cxa_atexit)(f, arg, dso);
327  return atexit_ctx->atexit(thr, pc, false, (void(*)())f, arg);
328}
329
330TSAN_INTERCEPTOR(void, longjmp, void *env, int val) {
331  SCOPED_TSAN_INTERCEPTOR(longjmp, env, val);
332  Printf("ThreadSanitizer: longjmp() is not supported\n");
333  Die();
334}
335
336TSAN_INTERCEPTOR(void, siglongjmp, void *env, int val) {
337  SCOPED_TSAN_INTERCEPTOR(siglongjmp, env, val);
338  Printf("ThreadSanitizer: siglongjmp() is not supported\n");
339  Die();
340}
341
342TSAN_INTERCEPTOR(void*, malloc, uptr size) {
343  if (cur_thread()->in_symbolizer)
344    return __libc_malloc(size);
345  void *p = 0;
346  {
347    SCOPED_INTERCEPTOR_RAW(malloc, size);
348    p = user_alloc(thr, pc, size);
349  }
350  invoke_malloc_hook(p, size);
351  return p;
352}
353
354TSAN_INTERCEPTOR(void*, __libc_memalign, uptr align, uptr sz) {
355  SCOPED_TSAN_INTERCEPTOR(__libc_memalign, align, sz);
356  return user_alloc(thr, pc, sz, align);
357}
358
359TSAN_INTERCEPTOR(void*, calloc, uptr size, uptr n) {
360  if (cur_thread()->in_symbolizer)
361    return __libc_calloc(size, n);
362  if (__sanitizer::CallocShouldReturnNullDueToOverflow(size, n)) return 0;
363  void *p = 0;
364  {
365    SCOPED_INTERCEPTOR_RAW(calloc, size, n);
366    p = user_alloc(thr, pc, n * size);
367    if (p) internal_memset(p, 0, n * size);
368  }
369  invoke_malloc_hook(p, n * size);
370  return p;
371}
372
373TSAN_INTERCEPTOR(void*, realloc, void *p, uptr size) {
374  if (cur_thread()->in_symbolizer)
375    return __libc_realloc(p, size);
376  if (p)
377    invoke_free_hook(p);
378  {
379    SCOPED_INTERCEPTOR_RAW(realloc, p, size);
380    p = user_realloc(thr, pc, p, size);
381  }
382  invoke_malloc_hook(p, size);
383  return p;
384}
385
386TSAN_INTERCEPTOR(void, free, void *p) {
387  if (p == 0)
388    return;
389  if (cur_thread()->in_symbolizer)
390    return __libc_free(p);
391  invoke_free_hook(p);
392  SCOPED_INTERCEPTOR_RAW(free, p);
393  user_free(thr, pc, p);
394}
395
396TSAN_INTERCEPTOR(void, cfree, void *p) {
397  if (p == 0)
398    return;
399  if (cur_thread()->in_symbolizer)
400    return __libc_free(p);
401  invoke_free_hook(p);
402  SCOPED_INTERCEPTOR_RAW(cfree, p);
403  user_free(thr, pc, p);
404}
405
406#define OPERATOR_NEW_BODY(mangled_name) \
407  if (cur_thread()->in_symbolizer) \
408    return __libc_malloc(size); \
409  void *p = 0; \
410  {  \
411    SCOPED_INTERCEPTOR_RAW(mangled_name, size); \
412    p = user_alloc(thr, pc, size); \
413  }  \
414  invoke_malloc_hook(p, size);  \
415  return p;
416
417void *operator new(__sanitizer::uptr size) {
418  OPERATOR_NEW_BODY(_Znwm);
419}
420void *operator new[](__sanitizer::uptr size) {
421  OPERATOR_NEW_BODY(_Znam);
422}
423void *operator new(__sanitizer::uptr size, std::nothrow_t const&) {
424  OPERATOR_NEW_BODY(_ZnwmRKSt9nothrow_t);
425}
426void *operator new[](__sanitizer::uptr size, std::nothrow_t const&) {
427  OPERATOR_NEW_BODY(_ZnamRKSt9nothrow_t);
428}
429
430#define OPERATOR_DELETE_BODY(mangled_name) \
431  if (ptr == 0) return;  \
432  if (cur_thread()->in_symbolizer) \
433    return __libc_free(ptr); \
434  invoke_free_hook(ptr);  \
435  SCOPED_INTERCEPTOR_RAW(mangled_name, ptr);  \
436  user_free(thr, pc, ptr);
437
438void operator delete(void *ptr) {
439  OPERATOR_DELETE_BODY(_ZdlPv);
440}
441void operator delete[](void *ptr) {
442  OPERATOR_DELETE_BODY(_ZdlPvRKSt9nothrow_t);
443}
444void operator delete(void *ptr, std::nothrow_t const&) {
445  OPERATOR_DELETE_BODY(_ZdaPv);
446}
447void operator delete[](void *ptr, std::nothrow_t const&) {
448  OPERATOR_DELETE_BODY(_ZdaPvRKSt9nothrow_t);
449}
450
451TSAN_INTERCEPTOR(uptr, strlen, const char *s) {
452  SCOPED_TSAN_INTERCEPTOR(strlen, s);
453  uptr len = internal_strlen(s);
454  MemoryAccessRange(thr, pc, (uptr)s, len + 1, false);
455  return len;
456}
457
458TSAN_INTERCEPTOR(void*, memset, void *dst, int v, uptr size) {
459  SCOPED_TSAN_INTERCEPTOR(memset, dst, v, size);
460  MemoryAccessRange(thr, pc, (uptr)dst, size, true);
461  return internal_memset(dst, v, size);
462}
463
464TSAN_INTERCEPTOR(void*, memcpy, void *dst, const void *src, uptr size) {
465  SCOPED_TSAN_INTERCEPTOR(memcpy, dst, src, size);
466  MemoryAccessRange(thr, pc, (uptr)dst, size, true);
467  MemoryAccessRange(thr, pc, (uptr)src, size, false);
468  return internal_memcpy(dst, src, size);
469}
470
471TSAN_INTERCEPTOR(int, memcmp, const void *s1, const void *s2, uptr n) {
472  SCOPED_TSAN_INTERCEPTOR(memcmp, s1, s2, n);
473  int res = 0;
474  uptr len = 0;
475  for (; len < n; len++) {
476    if ((res = ((unsigned char*)s1)[len] - ((unsigned char*)s2)[len]))
477      break;
478  }
479  MemoryAccessRange(thr, pc, (uptr)s1, len < n ? len + 1 : n, false);
480  MemoryAccessRange(thr, pc, (uptr)s2, len < n ? len + 1 : n, false);
481  return res;
482}
483
484TSAN_INTERCEPTOR(int, strcmp, const char *s1, const char *s2) {
485  SCOPED_TSAN_INTERCEPTOR(strcmp, s1, s2);
486  uptr len = 0;
487  for (; s1[len] && s2[len]; len++) {
488    if (s1[len] != s2[len])
489      break;
490  }
491  MemoryAccessRange(thr, pc, (uptr)s1, len + 1, false);
492  MemoryAccessRange(thr, pc, (uptr)s2, len + 1, false);
493  return s1[len] - s2[len];
494}
495
496TSAN_INTERCEPTOR(int, strncmp, const char *s1, const char *s2, uptr n) {
497  SCOPED_TSAN_INTERCEPTOR(strncmp, s1, s2, n);
498  uptr len = 0;
499  for (; len < n && s1[len] && s2[len]; len++) {
500    if (s1[len] != s2[len])
501      break;
502  }
503  MemoryAccessRange(thr, pc, (uptr)s1, len < n ? len + 1 : n, false);
504  MemoryAccessRange(thr, pc, (uptr)s2, len < n ? len + 1 : n, false);
505  return len == n ? 0 : s1[len] - s2[len];
506}
507
508TSAN_INTERCEPTOR(void*, memchr, void *s, int c, uptr n) {
509  SCOPED_TSAN_INTERCEPTOR(memchr, s, c, n);
510  void *res = REAL(memchr)(s, c, n);
511  uptr len = res ? (char*)res - (char*)s + 1 : n;
512  MemoryAccessRange(thr, pc, (uptr)s, len, false);
513  return res;
514}
515
516TSAN_INTERCEPTOR(void*, memrchr, char *s, int c, uptr n) {
517  SCOPED_TSAN_INTERCEPTOR(memrchr, s, c, n);
518  MemoryAccessRange(thr, pc, (uptr)s, n, false);
519  return REAL(memrchr)(s, c, n);
520}
521
522TSAN_INTERCEPTOR(void*, memmove, void *dst, void *src, uptr n) {
523  SCOPED_TSAN_INTERCEPTOR(memmove, dst, src, n);
524  MemoryAccessRange(thr, pc, (uptr)dst, n, true);
525  MemoryAccessRange(thr, pc, (uptr)src, n, false);
526  return REAL(memmove)(dst, src, n);
527}
528
529TSAN_INTERCEPTOR(char*, strchr, char *s, int c) {
530  SCOPED_TSAN_INTERCEPTOR(strchr, s, c);
531  char *res = REAL(strchr)(s, c);
532  uptr len = res ? (char*)res - (char*)s + 1 : internal_strlen(s) + 1;
533  MemoryAccessRange(thr, pc, (uptr)s, len, false);
534  return res;
535}
536
537TSAN_INTERCEPTOR(char*, strchrnul, char *s, int c) {
538  SCOPED_TSAN_INTERCEPTOR(strchrnul, s, c);
539  char *res = REAL(strchrnul)(s, c);
540  uptr len = (char*)res - (char*)s + 1;
541  MemoryAccessRange(thr, pc, (uptr)s, len, false);
542  return res;
543}
544
545TSAN_INTERCEPTOR(char*, strrchr, char *s, int c) {
546  SCOPED_TSAN_INTERCEPTOR(strrchr, s, c);
547  MemoryAccessRange(thr, pc, (uptr)s, internal_strlen(s) + 1, false);
548  return REAL(strrchr)(s, c);
549}
550
551TSAN_INTERCEPTOR(char*, strcpy, char *dst, const char *src) {  // NOLINT
552  SCOPED_TSAN_INTERCEPTOR(strcpy, dst, src);  // NOLINT
553  uptr srclen = internal_strlen(src);
554  MemoryAccessRange(thr, pc, (uptr)dst, srclen + 1, true);
555  MemoryAccessRange(thr, pc, (uptr)src, srclen + 1, false);
556  return REAL(strcpy)(dst, src);  // NOLINT
557}
558
559TSAN_INTERCEPTOR(char*, strncpy, char *dst, char *src, uptr n) {
560  SCOPED_TSAN_INTERCEPTOR(strncpy, dst, src, n);
561  uptr srclen = internal_strnlen(src, n);
562  MemoryAccessRange(thr, pc, (uptr)dst, n, true);
563  MemoryAccessRange(thr, pc, (uptr)src, min(srclen + 1, n), false);
564  return REAL(strncpy)(dst, src, n);
565}
566
567TSAN_INTERCEPTOR(const char*, strstr, const char *s1, const char *s2) {
568  SCOPED_TSAN_INTERCEPTOR(strstr, s1, s2);
569  const char *res = REAL(strstr)(s1, s2);
570  uptr len1 = internal_strlen(s1);
571  uptr len2 = internal_strlen(s2);
572  MemoryAccessRange(thr, pc, (uptr)s1, len1 + 1, false);
573  MemoryAccessRange(thr, pc, (uptr)s2, len2 + 1, false);
574  return res;
575}
576
577static bool fix_mmap_addr(void **addr, long_t sz, int flags) {
578  if (*addr) {
579    if (!IsAppMem((uptr)*addr) || !IsAppMem((uptr)*addr + sz - 1)) {
580      if (flags & MAP_FIXED) {
581        errno = EINVAL;
582        return false;
583      } else {
584        *addr = 0;
585      }
586    }
587  }
588  return true;
589}
590
591TSAN_INTERCEPTOR(void*, mmap, void *addr, long_t sz, int prot,
592                         int flags, int fd, unsigned off) {
593  SCOPED_TSAN_INTERCEPTOR(mmap, addr, sz, prot, flags, fd, off);
594  if (!fix_mmap_addr(&addr, sz, flags))
595    return MAP_FAILED;
596  void *res = REAL(mmap)(addr, sz, prot, flags, fd, off);
597  if (res != MAP_FAILED) {
598    if (fd > 0)
599      FdAccess(thr, pc, fd);
600    MemoryResetRange(thr, pc, (uptr)res, sz);
601  }
602  return res;
603}
604
605TSAN_INTERCEPTOR(void*, mmap64, void *addr, long_t sz, int prot,
606                           int flags, int fd, u64 off) {
607  SCOPED_TSAN_INTERCEPTOR(mmap64, addr, sz, prot, flags, fd, off);
608  if (!fix_mmap_addr(&addr, sz, flags))
609    return MAP_FAILED;
610  void *res = REAL(mmap64)(addr, sz, prot, flags, fd, off);
611  if (res != MAP_FAILED) {
612    if (fd > 0)
613      FdAccess(thr, pc, fd);
614    MemoryResetRange(thr, pc, (uptr)res, sz);
615  }
616  return res;
617}
618
619TSAN_INTERCEPTOR(int, munmap, void *addr, long_t sz) {
620  SCOPED_TSAN_INTERCEPTOR(munmap, addr, sz);
621  int res = REAL(munmap)(addr, sz);
622  return res;
623}
624
625TSAN_INTERCEPTOR(void*, memalign, uptr align, uptr sz) {
626  SCOPED_TSAN_INTERCEPTOR(memalign, align, sz);
627  return user_alloc(thr, pc, sz, align);
628}
629
630TSAN_INTERCEPTOR(void*, valloc, uptr sz) {
631  SCOPED_TSAN_INTERCEPTOR(valloc, sz);
632  return user_alloc(thr, pc, sz, GetPageSizeCached());
633}
634
635TSAN_INTERCEPTOR(void*, pvalloc, uptr sz) {
636  SCOPED_TSAN_INTERCEPTOR(pvalloc, sz);
637  sz = RoundUp(sz, GetPageSizeCached());
638  return user_alloc(thr, pc, sz, GetPageSizeCached());
639}
640
641TSAN_INTERCEPTOR(int, posix_memalign, void **memptr, uptr align, uptr sz) {
642  SCOPED_TSAN_INTERCEPTOR(posix_memalign, memptr, align, sz);
643  *memptr = user_alloc(thr, pc, sz, align);
644  return 0;
645}
646
647// Used in thread-safe function static initialization.
648extern "C" int INTERFACE_ATTRIBUTE __cxa_guard_acquire(atomic_uint32_t *g) {
649  SCOPED_INTERCEPTOR_RAW(__cxa_guard_acquire, g);
650  for (;;) {
651    u32 cmp = atomic_load(g, memory_order_acquire);
652    if (cmp == 0) {
653      if (atomic_compare_exchange_strong(g, &cmp, 1<<16, memory_order_relaxed))
654        return 1;
655    } else if (cmp == 1) {
656      Acquire(thr, pc, (uptr)g);
657      return 0;
658    } else {
659      internal_sched_yield();
660    }
661  }
662}
663
664extern "C" void INTERFACE_ATTRIBUTE __cxa_guard_release(atomic_uint32_t *g) {
665  SCOPED_INTERCEPTOR_RAW(__cxa_guard_release, g);
666  Release(thr, pc, (uptr)g);
667  atomic_store(g, 1, memory_order_release);
668}
669
670extern "C" void INTERFACE_ATTRIBUTE __cxa_guard_abort(atomic_uint32_t *g) {
671  SCOPED_INTERCEPTOR_RAW(__cxa_guard_abort, g);
672  atomic_store(g, 0, memory_order_relaxed);
673}
674
675static void thread_finalize(void *v) {
676  uptr iter = (uptr)v;
677  if (iter > 1) {
678    if (pthread_setspecific(g_thread_finalize_key, (void*)(iter - 1))) {
679      Printf("ThreadSanitizer: failed to set thread key\n");
680      Die();
681    }
682    return;
683  }
684  {
685    ScopedInRtl in_rtl;
686    ThreadState *thr = cur_thread();
687    ThreadFinish(thr);
688    SignalContext *sctx = thr->signal_ctx;
689    if (sctx) {
690      thr->signal_ctx = 0;
691      UnmapOrDie(sctx, sizeof(*sctx));
692    }
693  }
694}
695
696
697struct ThreadParam {
698  void* (*callback)(void *arg);
699  void *param;
700  atomic_uintptr_t tid;
701};
702
703extern "C" void *__tsan_thread_start_func(void *arg) {
704  ThreadParam *p = (ThreadParam*)arg;
705  void* (*callback)(void *arg) = p->callback;
706  void *param = p->param;
707  int tid = 0;
708  {
709    ThreadState *thr = cur_thread();
710    ScopedInRtl in_rtl;
711    if (pthread_setspecific(g_thread_finalize_key, (void*)4)) {
712      Printf("ThreadSanitizer: failed to set thread key\n");
713      Die();
714    }
715    while ((tid = atomic_load(&p->tid, memory_order_acquire)) == 0)
716      pthread_yield();
717    atomic_store(&p->tid, 0, memory_order_release);
718    ThreadStart(thr, tid, GetTid());
719    CHECK_EQ(thr->in_rtl, 1);
720  }
721  void *res = callback(param);
722  // Prevent the callback from being tail called,
723  // it mixes up stack traces.
724  volatile int foo = 42;
725  foo++;
726  return res;
727}
728
729TSAN_INTERCEPTOR(int, pthread_create,
730    void *th, void *attr, void *(*callback)(void*), void * param) {
731  SCOPED_TSAN_INTERCEPTOR(pthread_create, th, attr, callback, param);
732  pthread_attr_t myattr;
733  if (attr == 0) {
734    pthread_attr_init(&myattr);
735    attr = &myattr;
736  }
737  int detached = 0;
738  pthread_attr_getdetachstate(attr, &detached);
739  uptr stacksize = 0;
740  pthread_attr_getstacksize(attr, &stacksize);
741  // We place the huge ThreadState object into TLS, account for that.
742  const uptr minstacksize = GetTlsSize() + 128*1024;
743  if (stacksize < minstacksize) {
744    DPrintf("ThreadSanitizer: stacksize %zu->%zu\n", stacksize, minstacksize);
745    pthread_attr_setstacksize(attr, minstacksize);
746  }
747  ThreadParam p;
748  p.callback = callback;
749  p.param = param;
750  atomic_store(&p.tid, 0, memory_order_relaxed);
751  int res = REAL(pthread_create)(th, attr, __tsan_thread_start_func, &p);
752  if (res == 0) {
753    int tid = ThreadCreate(thr, pc, *(uptr*)th, detached);
754    CHECK_NE(tid, 0);
755    atomic_store(&p.tid, tid, memory_order_release);
756    while (atomic_load(&p.tid, memory_order_acquire) != 0)
757      pthread_yield();
758  }
759  if (attr == &myattr)
760    pthread_attr_destroy(&myattr);
761  return res;
762}
763
764TSAN_INTERCEPTOR(int, pthread_join, void *th, void **ret) {
765  SCOPED_TSAN_INTERCEPTOR(pthread_join, th, ret);
766  int tid = ThreadTid(thr, pc, (uptr)th);
767  int res = BLOCK_REAL(pthread_join)(th, ret);
768  if (res == 0) {
769    ThreadJoin(thr, pc, tid);
770  }
771  return res;
772}
773
774TSAN_INTERCEPTOR(int, pthread_detach, void *th) {
775  SCOPED_TSAN_INTERCEPTOR(pthread_detach, th);
776  int tid = ThreadTid(thr, pc, (uptr)th);
777  int res = REAL(pthread_detach)(th);
778  if (res == 0) {
779    ThreadDetach(thr, pc, tid);
780  }
781  return res;
782}
783
784TSAN_INTERCEPTOR(int, pthread_mutex_init, void *m, void *a) {
785  SCOPED_TSAN_INTERCEPTOR(pthread_mutex_init, m, a);
786  int res = REAL(pthread_mutex_init)(m, a);
787  if (res == 0) {
788    bool recursive = false;
789    if (a) {
790      int type = 0;
791      if (pthread_mutexattr_gettype(a, &type) == 0)
792        recursive = (type == PTHREAD_MUTEX_RECURSIVE
793            || type == PTHREAD_MUTEX_RECURSIVE_NP);
794    }
795    MutexCreate(thr, pc, (uptr)m, false, recursive, false);
796  }
797  return res;
798}
799
800TSAN_INTERCEPTOR(int, pthread_mutex_destroy, void *m) {
801  SCOPED_TSAN_INTERCEPTOR(pthread_mutex_destroy, m);
802  int res = REAL(pthread_mutex_destroy)(m);
803  if (res == 0 || res == EBUSY) {
804    MutexDestroy(thr, pc, (uptr)m);
805  }
806  return res;
807}
808
809TSAN_INTERCEPTOR(int, pthread_mutex_lock, void *m) {
810  SCOPED_TSAN_INTERCEPTOR(pthread_mutex_lock, m);
811  int res = REAL(pthread_mutex_lock)(m);
812  if (res == 0) {
813    MutexLock(thr, pc, (uptr)m);
814  }
815  return res;
816}
817
818TSAN_INTERCEPTOR(int, pthread_mutex_trylock, void *m) {
819  SCOPED_TSAN_INTERCEPTOR(pthread_mutex_trylock, m);
820  int res = REAL(pthread_mutex_trylock)(m);
821  if (res == 0) {
822    MutexLock(thr, pc, (uptr)m);
823  }
824  return res;
825}
826
827TSAN_INTERCEPTOR(int, pthread_mutex_timedlock, void *m, void *abstime) {
828  SCOPED_TSAN_INTERCEPTOR(pthread_mutex_timedlock, m, abstime);
829  int res = REAL(pthread_mutex_timedlock)(m, abstime);
830  if (res == 0) {
831    MutexLock(thr, pc, (uptr)m);
832  }
833  return res;
834}
835
836TSAN_INTERCEPTOR(int, pthread_mutex_unlock, void *m) {
837  SCOPED_TSAN_INTERCEPTOR(pthread_mutex_unlock, m);
838  MutexUnlock(thr, pc, (uptr)m);
839  int res = REAL(pthread_mutex_unlock)(m);
840  return res;
841}
842
843TSAN_INTERCEPTOR(int, pthread_spin_init, void *m, int pshared) {
844  SCOPED_TSAN_INTERCEPTOR(pthread_spin_init, m, pshared);
845  int res = REAL(pthread_spin_init)(m, pshared);
846  if (res == 0) {
847    MutexCreate(thr, pc, (uptr)m, false, false, false);
848  }
849  return res;
850}
851
852TSAN_INTERCEPTOR(int, pthread_spin_destroy, void *m) {
853  SCOPED_TSAN_INTERCEPTOR(pthread_spin_destroy, m);
854  int res = REAL(pthread_spin_destroy)(m);
855  if (res == 0) {
856    MutexDestroy(thr, pc, (uptr)m);
857  }
858  return res;
859}
860
861TSAN_INTERCEPTOR(int, pthread_spin_lock, void *m) {
862  SCOPED_TSAN_INTERCEPTOR(pthread_spin_lock, m);
863  int res = REAL(pthread_spin_lock)(m);
864  if (res == 0) {
865    MutexLock(thr, pc, (uptr)m);
866  }
867  return res;
868}
869
870TSAN_INTERCEPTOR(int, pthread_spin_trylock, void *m) {
871  SCOPED_TSAN_INTERCEPTOR(pthread_spin_trylock, m);
872  int res = REAL(pthread_spin_trylock)(m);
873  if (res == 0) {
874    MutexLock(thr, pc, (uptr)m);
875  }
876  return res;
877}
878
879TSAN_INTERCEPTOR(int, pthread_spin_unlock, void *m) {
880  SCOPED_TSAN_INTERCEPTOR(pthread_spin_unlock, m);
881  MutexUnlock(thr, pc, (uptr)m);
882  int res = REAL(pthread_spin_unlock)(m);
883  return res;
884}
885
886TSAN_INTERCEPTOR(int, pthread_rwlock_init, void *m, void *a) {
887  SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_init, m, a);
888  int res = REAL(pthread_rwlock_init)(m, a);
889  if (res == 0) {
890    MutexCreate(thr, pc, (uptr)m, true, false, false);
891  }
892  return res;
893}
894
895TSAN_INTERCEPTOR(int, pthread_rwlock_destroy, void *m) {
896  SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_destroy, m);
897  int res = REAL(pthread_rwlock_destroy)(m);
898  if (res == 0) {
899    MutexDestroy(thr, pc, (uptr)m);
900  }
901  return res;
902}
903
904TSAN_INTERCEPTOR(int, pthread_rwlock_rdlock, void *m) {
905  SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_rdlock, m);
906  int res = REAL(pthread_rwlock_rdlock)(m);
907  if (res == 0) {
908    MutexReadLock(thr, pc, (uptr)m);
909  }
910  return res;
911}
912
913TSAN_INTERCEPTOR(int, pthread_rwlock_tryrdlock, void *m) {
914  SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_tryrdlock, m);
915  int res = REAL(pthread_rwlock_tryrdlock)(m);
916  if (res == 0) {
917    MutexReadLock(thr, pc, (uptr)m);
918  }
919  return res;
920}
921
922TSAN_INTERCEPTOR(int, pthread_rwlock_timedrdlock, void *m, void *abstime) {
923  SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_timedrdlock, m, abstime);
924  int res = REAL(pthread_rwlock_timedrdlock)(m, abstime);
925  if (res == 0) {
926    MutexReadLock(thr, pc, (uptr)m);
927  }
928  return res;
929}
930
931TSAN_INTERCEPTOR(int, pthread_rwlock_wrlock, void *m) {
932  SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_wrlock, m);
933  int res = REAL(pthread_rwlock_wrlock)(m);
934  if (res == 0) {
935    MutexLock(thr, pc, (uptr)m);
936  }
937  return res;
938}
939
940TSAN_INTERCEPTOR(int, pthread_rwlock_trywrlock, void *m) {
941  SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_trywrlock, m);
942  int res = REAL(pthread_rwlock_trywrlock)(m);
943  if (res == 0) {
944    MutexLock(thr, pc, (uptr)m);
945  }
946  return res;
947}
948
949TSAN_INTERCEPTOR(int, pthread_rwlock_timedwrlock, void *m, void *abstime) {
950  SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_timedwrlock, m, abstime);
951  int res = REAL(pthread_rwlock_timedwrlock)(m, abstime);
952  if (res == 0) {
953    MutexLock(thr, pc, (uptr)m);
954  }
955  return res;
956}
957
958TSAN_INTERCEPTOR(int, pthread_rwlock_unlock, void *m) {
959  SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_unlock, m);
960  MutexReadOrWriteUnlock(thr, pc, (uptr)m);
961  int res = REAL(pthread_rwlock_unlock)(m);
962  return res;
963}
964
965// libpthread.so contains several versions of pthread_cond_init symbol.
966// When we just dlsym() it, we get the wrong (old) version.
967/*
968TSAN_INTERCEPTOR(int, pthread_cond_init, void *c, void *a) {
969  SCOPED_TSAN_INTERCEPTOR(pthread_cond_init, c, a);
970  int res = REAL(pthread_cond_init)(c, a);
971  return res;
972}
973*/
974
975TSAN_INTERCEPTOR(int, pthread_cond_destroy, void *c) {
976  SCOPED_TSAN_INTERCEPTOR(pthread_cond_destroy, c);
977  int res = REAL(pthread_cond_destroy)(c);
978  return res;
979}
980
981TSAN_INTERCEPTOR(int, pthread_cond_signal, void *c) {
982  SCOPED_TSAN_INTERCEPTOR(pthread_cond_signal, c);
983  int res = REAL(pthread_cond_signal)(c);
984  return res;
985}
986
987TSAN_INTERCEPTOR(int, pthread_cond_broadcast, void *c) {
988  SCOPED_TSAN_INTERCEPTOR(pthread_cond_broadcast, c);
989  int res = REAL(pthread_cond_broadcast)(c);
990  return res;
991}
992
993TSAN_INTERCEPTOR(int, pthread_cond_wait, void *c, void *m) {
994  SCOPED_TSAN_INTERCEPTOR(pthread_cond_wait, c, m);
995  MutexUnlock(thr, pc, (uptr)m);
996  int res = REAL(pthread_cond_wait)(c, m);
997  MutexLock(thr, pc, (uptr)m);
998  return res;
999}
1000
1001TSAN_INTERCEPTOR(int, pthread_cond_timedwait, void *c, void *m, void *abstime) {
1002  SCOPED_TSAN_INTERCEPTOR(pthread_cond_timedwait, c, m, abstime);
1003  MutexUnlock(thr, pc, (uptr)m);
1004  int res = REAL(pthread_cond_timedwait)(c, m, abstime);
1005  MutexLock(thr, pc, (uptr)m);
1006  return res;
1007}
1008
1009TSAN_INTERCEPTOR(int, pthread_barrier_init, void *b, void *a, unsigned count) {
1010  SCOPED_TSAN_INTERCEPTOR(pthread_barrier_init, b, a, count);
1011  MemoryWrite(thr, pc, (uptr)b, kSizeLog1);
1012  int res = REAL(pthread_barrier_init)(b, a, count);
1013  return res;
1014}
1015
1016TSAN_INTERCEPTOR(int, pthread_barrier_destroy, void *b) {
1017  SCOPED_TSAN_INTERCEPTOR(pthread_barrier_destroy, b);
1018  MemoryWrite(thr, pc, (uptr)b, kSizeLog1);
1019  int res = REAL(pthread_barrier_destroy)(b);
1020  return res;
1021}
1022
1023TSAN_INTERCEPTOR(int, pthread_barrier_wait, void *b) {
1024  SCOPED_TSAN_INTERCEPTOR(pthread_barrier_wait, b);
1025  Release(thr, pc, (uptr)b);
1026  MemoryRead(thr, pc, (uptr)b, kSizeLog1);
1027  int res = REAL(pthread_barrier_wait)(b);
1028  MemoryRead(thr, pc, (uptr)b, kSizeLog1);
1029  if (res == 0 || res == PTHREAD_BARRIER_SERIAL_THREAD) {
1030    Acquire(thr, pc, (uptr)b);
1031  }
1032  return res;
1033}
1034
1035TSAN_INTERCEPTOR(int, pthread_once, void *o, void (*f)()) {
1036  SCOPED_TSAN_INTERCEPTOR(pthread_once, o, f);
1037  if (o == 0 || f == 0)
1038    return EINVAL;
1039  atomic_uint32_t *a = static_cast<atomic_uint32_t*>(o);
1040  u32 v = atomic_load(a, memory_order_acquire);
1041  if (v == 0 && atomic_compare_exchange_strong(a, &v, 1,
1042                                               memory_order_relaxed)) {
1043    const int old_in_rtl = thr->in_rtl;
1044    thr->in_rtl = 0;
1045    (*f)();
1046    CHECK_EQ(thr->in_rtl, 0);
1047    thr->in_rtl = old_in_rtl;
1048    Release(thr, pc, (uptr)o);
1049    atomic_store(a, 2, memory_order_release);
1050  } else {
1051    while (v != 2) {
1052      pthread_yield();
1053      v = atomic_load(a, memory_order_acquire);
1054    }
1055    Acquire(thr, pc, (uptr)o);
1056  }
1057  return 0;
1058}
1059
1060TSAN_INTERCEPTOR(int, sem_init, void *s, int pshared, unsigned value) {
1061  SCOPED_TSAN_INTERCEPTOR(sem_init, s, pshared, value);
1062  int res = REAL(sem_init)(s, pshared, value);
1063  return res;
1064}
1065
1066TSAN_INTERCEPTOR(int, sem_destroy, void *s) {
1067  SCOPED_TSAN_INTERCEPTOR(sem_destroy, s);
1068  int res = REAL(sem_destroy)(s);
1069  return res;
1070}
1071
1072TSAN_INTERCEPTOR(int, sem_wait, void *s) {
1073  SCOPED_TSAN_INTERCEPTOR(sem_wait, s);
1074  int res = BLOCK_REAL(sem_wait)(s);
1075  if (res == 0) {
1076    Acquire(thr, pc, (uptr)s);
1077  }
1078  return res;
1079}
1080
1081TSAN_INTERCEPTOR(int, sem_trywait, void *s) {
1082  SCOPED_TSAN_INTERCEPTOR(sem_trywait, s);
1083  int res = BLOCK_REAL(sem_trywait)(s);
1084  if (res == 0) {
1085    Acquire(thr, pc, (uptr)s);
1086  }
1087  return res;
1088}
1089
1090TSAN_INTERCEPTOR(int, sem_timedwait, void *s, void *abstime) {
1091  SCOPED_TSAN_INTERCEPTOR(sem_timedwait, s, abstime);
1092  int res = BLOCK_REAL(sem_timedwait)(s, abstime);
1093  if (res == 0) {
1094    Acquire(thr, pc, (uptr)s);
1095  }
1096  return res;
1097}
1098
1099TSAN_INTERCEPTOR(int, sem_post, void *s) {
1100  SCOPED_TSAN_INTERCEPTOR(sem_post, s);
1101  Release(thr, pc, (uptr)s);
1102  int res = REAL(sem_post)(s);
1103  return res;
1104}
1105
1106TSAN_INTERCEPTOR(int, sem_getvalue, void *s, int *sval) {
1107  SCOPED_TSAN_INTERCEPTOR(sem_getvalue, s, sval);
1108  int res = REAL(sem_getvalue)(s, sval);
1109  if (res == 0) {
1110    Acquire(thr, pc, (uptr)s);
1111  }
1112  return res;
1113}
1114
1115TSAN_INTERCEPTOR(int, __xstat, int version, const char *path, void *buf) {
1116  SCOPED_TSAN_INTERCEPTOR(__xstat, version, path, buf);
1117  return REAL(__xstat)(version, path, buf);
1118}
1119
1120TSAN_INTERCEPTOR(int, stat, const char *path, void *buf) {
1121  SCOPED_TSAN_INTERCEPTOR(__xstat, 0, path, buf);
1122  return REAL(__xstat)(0, path, buf);
1123}
1124
1125TSAN_INTERCEPTOR(int, __xstat64, int version, const char *path, void *buf) {
1126  SCOPED_TSAN_INTERCEPTOR(__xstat64, version, path, buf);
1127  return REAL(__xstat64)(version, path, buf);
1128}
1129
1130TSAN_INTERCEPTOR(int, stat64, const char *path, void *buf) {
1131  SCOPED_TSAN_INTERCEPTOR(__xstat64, 0, path, buf);
1132  return REAL(__xstat64)(0, path, buf);
1133}
1134
1135TSAN_INTERCEPTOR(int, __lxstat, int version, const char *path, void *buf) {
1136  SCOPED_TSAN_INTERCEPTOR(__lxstat, version, path, buf);
1137  return REAL(__lxstat)(version, path, buf);
1138}
1139
1140TSAN_INTERCEPTOR(int, lstat, const char *path, void *buf) {
1141  SCOPED_TSAN_INTERCEPTOR(__lxstat, 0, path, buf);
1142  return REAL(__lxstat)(0, path, buf);
1143}
1144
1145TSAN_INTERCEPTOR(int, __lxstat64, int version, const char *path, void *buf) {
1146  SCOPED_TSAN_INTERCEPTOR(__lxstat64, version, path, buf);
1147  return REAL(__lxstat64)(version, path, buf);
1148}
1149
1150TSAN_INTERCEPTOR(int, lstat64, const char *path, void *buf) {
1151  SCOPED_TSAN_INTERCEPTOR(__lxstat64, 0, path, buf);
1152  return REAL(__lxstat64)(0, path, buf);
1153}
1154
1155TSAN_INTERCEPTOR(int, __fxstat, int version, int fd, void *buf) {
1156  SCOPED_TSAN_INTERCEPTOR(__fxstat, version, fd, buf);
1157  if (fd > 0)
1158    FdAccess(thr, pc, fd);
1159  return REAL(__fxstat)(version, fd, buf);
1160}
1161
1162TSAN_INTERCEPTOR(int, fstat, int fd, void *buf) {
1163  SCOPED_TSAN_INTERCEPTOR(__fxstat, 0, fd, buf);
1164  if (fd > 0)
1165    FdAccess(thr, pc, fd);
1166  return REAL(__fxstat)(0, fd, buf);
1167}
1168
1169TSAN_INTERCEPTOR(int, __fxstat64, int version, int fd, void *buf) {
1170  SCOPED_TSAN_INTERCEPTOR(__fxstat64, version, fd, buf);
1171  if (fd > 0)
1172    FdAccess(thr, pc, fd);
1173  return REAL(__fxstat64)(version, fd, buf);
1174}
1175
1176TSAN_INTERCEPTOR(int, fstat64, int fd, void *buf) {
1177  SCOPED_TSAN_INTERCEPTOR(__fxstat64, 0, fd, buf);
1178  if (fd > 0)
1179    FdAccess(thr, pc, fd);
1180  return REAL(__fxstat64)(0, fd, buf);
1181}
1182
1183TSAN_INTERCEPTOR(int, open, const char *name, int flags, int mode) {
1184  SCOPED_TSAN_INTERCEPTOR(open, name, flags, mode);
1185  int fd = REAL(open)(name, flags, mode);
1186  if (fd >= 0)
1187    FdFileCreate(thr, pc, fd);
1188  return fd;
1189}
1190
1191TSAN_INTERCEPTOR(int, open64, const char *name, int flags, int mode) {
1192  SCOPED_TSAN_INTERCEPTOR(open64, name, flags, mode);
1193  int fd = REAL(open64)(name, flags, mode);
1194  if (fd >= 0)
1195    FdFileCreate(thr, pc, fd);
1196  return fd;
1197}
1198
1199TSAN_INTERCEPTOR(int, creat, const char *name, int mode) {
1200  SCOPED_TSAN_INTERCEPTOR(creat, name, mode);
1201  int fd = REAL(creat)(name, mode);
1202  if (fd >= 0)
1203    FdFileCreate(thr, pc, fd);
1204  return fd;
1205}
1206
1207TSAN_INTERCEPTOR(int, creat64, const char *name, int mode) {
1208  SCOPED_TSAN_INTERCEPTOR(creat64, name, mode);
1209  int fd = REAL(creat64)(name, mode);
1210  if (fd >= 0)
1211    FdFileCreate(thr, pc, fd);
1212  return fd;
1213}
1214
1215TSAN_INTERCEPTOR(int, dup, int oldfd) {
1216  SCOPED_TSAN_INTERCEPTOR(dup, oldfd);
1217  int newfd = REAL(dup)(oldfd);
1218  if (oldfd >= 0 && newfd >= 0 && newfd != oldfd)
1219    FdDup(thr, pc, oldfd, newfd);
1220  return newfd;
1221}
1222
1223TSAN_INTERCEPTOR(int, dup2, int oldfd, int newfd) {
1224  SCOPED_TSAN_INTERCEPTOR(dup2, oldfd, newfd);
1225  int newfd2 = REAL(dup2)(oldfd, newfd);
1226  if (oldfd >= 0 && newfd2 >= 0 && newfd2 != oldfd)
1227    FdDup(thr, pc, oldfd, newfd2);
1228  return newfd2;
1229}
1230
1231TSAN_INTERCEPTOR(int, dup3, int oldfd, int newfd, int flags) {
1232  SCOPED_TSAN_INTERCEPTOR(dup3, oldfd, newfd, flags);
1233  int newfd2 = REAL(dup3)(oldfd, newfd, flags);
1234  if (oldfd >= 0 && newfd2 >= 0 && newfd2 != oldfd)
1235    FdDup(thr, pc, oldfd, newfd2);
1236  return newfd2;
1237}
1238
1239TSAN_INTERCEPTOR(int, eventfd, unsigned initval, int flags) {
1240  SCOPED_TSAN_INTERCEPTOR(eventfd, initval, flags);
1241  int fd = REAL(eventfd)(initval, flags);
1242  if (fd >= 0)
1243    FdEventCreate(thr, pc, fd);
1244  return fd;
1245}
1246
1247TSAN_INTERCEPTOR(int, signalfd, int fd, void *mask, int flags) {
1248  SCOPED_TSAN_INTERCEPTOR(signalfd, fd, mask, flags);
1249  if (fd >= 0)
1250    FdClose(thr, pc, fd);
1251  fd = REAL(signalfd)(fd, mask, flags);
1252  if (fd >= 0)
1253    FdSignalCreate(thr, pc, fd);
1254  return fd;
1255}
1256
1257TSAN_INTERCEPTOR(int, inotify_init, int fake) {
1258  SCOPED_TSAN_INTERCEPTOR(inotify_init, fake);
1259  int fd = REAL(inotify_init)(fake);
1260  if (fd >= 0)
1261    FdInotifyCreate(thr, pc, fd);
1262  return fd;
1263}
1264
1265TSAN_INTERCEPTOR(int, inotify_init1, int flags) {
1266  SCOPED_TSAN_INTERCEPTOR(inotify_init1, flags);
1267  int fd = REAL(inotify_init1)(flags);
1268  if (fd >= 0)
1269    FdInotifyCreate(thr, pc, fd);
1270  return fd;
1271}
1272
1273TSAN_INTERCEPTOR(int, socket, int domain, int type, int protocol) {
1274  SCOPED_TSAN_INTERCEPTOR(socket, domain, type, protocol);
1275  int fd = REAL(socket)(domain, type, protocol);
1276  if (fd >= 0)
1277    FdSocketCreate(thr, pc, fd);
1278  return fd;
1279}
1280
1281TSAN_INTERCEPTOR(int, socketpair, int domain, int type, int protocol, int *fd) {
1282  SCOPED_TSAN_INTERCEPTOR(socketpair, domain, type, protocol, fd);
1283  int res = REAL(socketpair)(domain, type, protocol, fd);
1284  if (res == 0 && fd[0] >= 0 && fd[1] >= 0)
1285    FdPipeCreate(thr, pc, fd[0], fd[1]);
1286  return res;
1287}
1288
1289TSAN_INTERCEPTOR(int, connect, int fd, void *addr, unsigned addrlen) {
1290  SCOPED_TSAN_INTERCEPTOR(connect, fd, addr, addrlen);
1291  FdSocketConnecting(thr, pc, fd);
1292  int res = REAL(connect)(fd, addr, addrlen);
1293  if (res == 0 && fd >= 0)
1294    FdSocketConnect(thr, pc, fd);
1295  return res;
1296}
1297
1298TSAN_INTERCEPTOR(int, accept, int fd, void *addr, unsigned *addrlen) {
1299  SCOPED_TSAN_INTERCEPTOR(accept, fd, addr, addrlen);
1300  int fd2 = REAL(accept)(fd, addr, addrlen);
1301  if (fd >= 0 && fd2 >= 0)
1302    FdSocketAccept(thr, pc, fd, fd2);
1303  return fd2;
1304}
1305
1306TSAN_INTERCEPTOR(int, accept4, int fd, void *addr, unsigned *addrlen, int f) {
1307  SCOPED_TSAN_INTERCEPTOR(accept4, fd, addr, addrlen, f);
1308  int fd2 = REAL(accept4)(fd, addr, addrlen, f);
1309  if (fd >= 0 && fd2 >= 0)
1310    FdSocketAccept(thr, pc, fd, fd2);
1311  return fd2;
1312}
1313
1314TSAN_INTERCEPTOR(int, epoll_create, int size) {
1315  SCOPED_TSAN_INTERCEPTOR(epoll_create, size);
1316  int fd = REAL(epoll_create)(size);
1317  if (fd >= 0)
1318    FdPollCreate(thr, pc, fd);
1319  return fd;
1320}
1321
1322TSAN_INTERCEPTOR(int, epoll_create1, int flags) {
1323  SCOPED_TSAN_INTERCEPTOR(epoll_create1, flags);
1324  int fd = REAL(epoll_create1)(flags);
1325  if (fd >= 0)
1326    FdPollCreate(thr, pc, fd);
1327  return fd;
1328}
1329
1330TSAN_INTERCEPTOR(int, close, int fd) {
1331  SCOPED_TSAN_INTERCEPTOR(close, fd);
1332  if (fd >= 0)
1333    FdClose(thr, pc, fd);
1334  return REAL(close)(fd);
1335}
1336
1337TSAN_INTERCEPTOR(int, __close, int fd) {
1338  SCOPED_TSAN_INTERCEPTOR(__close, fd);
1339  if (fd >= 0)
1340    FdClose(thr, pc, fd);
1341  return REAL(__close)(fd);
1342}
1343
1344TSAN_INTERCEPTOR(int, pipe, int *pipefd) {
1345  SCOPED_TSAN_INTERCEPTOR(pipe, pipefd);
1346  int res = REAL(pipe)(pipefd);
1347  if (res == 0 && pipefd[0] >= 0 && pipefd[1] >= 0)
1348    FdPipeCreate(thr, pc, pipefd[0], pipefd[1]);
1349  return res;
1350}
1351
1352TSAN_INTERCEPTOR(int, pipe2, int *pipefd, int flags) {
1353  SCOPED_TSAN_INTERCEPTOR(pipe2, pipefd, flags);
1354  int res = REAL(pipe2)(pipefd, flags);
1355  if (res == 0 && pipefd[0] >= 0 && pipefd[1] >= 0)
1356    FdPipeCreate(thr, pc, pipefd[0], pipefd[1]);
1357  return res;
1358}
1359
1360TSAN_INTERCEPTOR(long_t, readv, int fd, void *vec, int cnt) {
1361  SCOPED_TSAN_INTERCEPTOR(readv, fd, vec, cnt);
1362  int res = REAL(readv)(fd, vec, cnt);
1363  if (res >= 0 && fd >= 0) {
1364    FdAcquire(thr, pc, fd);
1365  }
1366  return res;
1367}
1368
1369TSAN_INTERCEPTOR(long_t, preadv64, int fd, void *vec, int cnt, u64 off) {
1370  SCOPED_TSAN_INTERCEPTOR(preadv64, fd, vec, cnt, off);
1371  int res = REAL(preadv64)(fd, vec, cnt, off);
1372  if (res >= 0 && fd >= 0) {
1373    FdAcquire(thr, pc, fd);
1374  }
1375  return res;
1376}
1377
1378TSAN_INTERCEPTOR(long_t, writev, int fd, void *vec, int cnt) {
1379  SCOPED_TSAN_INTERCEPTOR(writev, fd, vec, cnt);
1380  if (fd >= 0)
1381    FdRelease(thr, pc, fd);
1382  int res = REAL(writev)(fd, vec, cnt);
1383  return res;
1384}
1385
1386TSAN_INTERCEPTOR(long_t, pwritev64, int fd, void *vec, int cnt, u64 off) {
1387  SCOPED_TSAN_INTERCEPTOR(pwritev64, fd, vec, cnt, off);
1388  if (fd >= 0)
1389    FdRelease(thr, pc, fd);
1390  int res = REAL(pwritev64)(fd, vec, cnt, off);
1391  return res;
1392}
1393
1394TSAN_INTERCEPTOR(long_t, send, int fd, void *buf, long_t len, int flags) {
1395  SCOPED_TSAN_INTERCEPTOR(send, fd, buf, len, flags);
1396  if (fd >= 0)
1397    FdRelease(thr, pc, fd);
1398  int res = REAL(send)(fd, buf, len, flags);
1399  return res;
1400}
1401
1402TSAN_INTERCEPTOR(long_t, sendmsg, int fd, void *msg, int flags) {
1403  SCOPED_TSAN_INTERCEPTOR(sendmsg, fd, msg, flags);
1404  if (fd >= 0)
1405    FdRelease(thr, pc, fd);
1406  int res = REAL(sendmsg)(fd, msg, flags);
1407  return res;
1408}
1409
1410TSAN_INTERCEPTOR(long_t, recv, int fd, void *buf, long_t len, int flags) {
1411  SCOPED_TSAN_INTERCEPTOR(recv, fd, buf, len, flags);
1412  int res = REAL(recv)(fd, buf, len, flags);
1413  if (res >= 0 && fd >= 0) {
1414    FdAcquire(thr, pc, fd);
1415  }
1416  return res;
1417}
1418
1419TSAN_INTERCEPTOR(long_t, recvmsg, int fd, void *msg, int flags) {
1420  SCOPED_TSAN_INTERCEPTOR(recvmsg, fd, msg, flags);
1421  int res = REAL(recvmsg)(fd, msg, flags);
1422  if (res >= 0 && fd >= 0) {
1423    FdAcquire(thr, pc, fd);
1424  }
1425  return res;
1426}
1427
1428TSAN_INTERCEPTOR(int, unlink, char *path) {
1429  SCOPED_TSAN_INTERCEPTOR(unlink, path);
1430  Release(thr, pc, File2addr(path));
1431  int res = REAL(unlink)(path);
1432  return res;
1433}
1434
1435TSAN_INTERCEPTOR(void*, fopen, char *path, char *mode) {
1436  SCOPED_TSAN_INTERCEPTOR(fopen, path, mode);
1437  void *res = REAL(fopen)(path, mode);
1438  Acquire(thr, pc, File2addr(path));
1439  if (res) {
1440    int fd = fileno_unlocked(res);
1441    if (fd >= 0)
1442      FdFileCreate(thr, pc, fd);
1443  }
1444  return res;
1445}
1446
1447TSAN_INTERCEPTOR(void*, freopen, char *path, char *mode, void *stream) {
1448  SCOPED_TSAN_INTERCEPTOR(freopen, path, mode, stream);
1449  if (stream) {
1450    int fd = fileno_unlocked(stream);
1451    if (fd >= 0)
1452      FdClose(thr, pc, fd);
1453  }
1454  void *res = REAL(freopen)(path, mode, stream);
1455  Acquire(thr, pc, File2addr(path));
1456  if (res) {
1457    int fd = fileno_unlocked(res);
1458    if (fd >= 0)
1459      FdFileCreate(thr, pc, fd);
1460  }
1461  return res;
1462}
1463
1464TSAN_INTERCEPTOR(int, fclose, void *stream) {
1465  {
1466    SCOPED_TSAN_INTERCEPTOR(fclose, stream);
1467    if (stream) {
1468      int fd = fileno_unlocked(stream);
1469      if (fd >= 0)
1470        FdClose(thr, pc, fd);
1471    }
1472  }
1473  return REAL(fclose)(stream);
1474}
1475
1476TSAN_INTERCEPTOR(uptr, fread, void *ptr, uptr size, uptr nmemb, void *f) {
1477  {
1478    SCOPED_TSAN_INTERCEPTOR(fread, ptr, size, nmemb, f);
1479    MemoryAccessRange(thr, pc, (uptr)ptr, size * nmemb, true);
1480  }
1481  return REAL(fread)(ptr, size, nmemb, f);
1482}
1483
1484TSAN_INTERCEPTOR(uptr, fwrite, const void *p, uptr size, uptr nmemb, void *f) {
1485  {
1486    SCOPED_TSAN_INTERCEPTOR(fwrite, p, size, nmemb, f);
1487    MemoryAccessRange(thr, pc, (uptr)p, size * nmemb, false);
1488  }
1489  return REAL(fwrite)(p, size, nmemb, f);
1490}
1491
1492TSAN_INTERCEPTOR(int, puts, const char *s) {
1493  SCOPED_TSAN_INTERCEPTOR(puts, s);
1494  MemoryAccessRange(thr, pc, (uptr)s, internal_strlen(s), false);
1495  return REAL(puts)(s);
1496}
1497
1498TSAN_INTERCEPTOR(int, rmdir, char *path) {
1499  SCOPED_TSAN_INTERCEPTOR(rmdir, path);
1500  Release(thr, pc, Dir2addr(path));
1501  int res = REAL(rmdir)(path);
1502  return res;
1503}
1504
1505TSAN_INTERCEPTOR(void*, opendir, char *path) {
1506  SCOPED_TSAN_INTERCEPTOR(opendir, path);
1507  void *res = REAL(opendir)(path);
1508  if (res != 0)
1509    Acquire(thr, pc, Dir2addr(path));
1510  return res;
1511}
1512
1513TSAN_INTERCEPTOR(int, epoll_ctl, int epfd, int op, int fd, void *ev) {
1514  SCOPED_TSAN_INTERCEPTOR(epoll_ctl, epfd, op, fd, ev);
1515  if (op == EPOLL_CTL_ADD && epfd >= 0) {
1516    FdRelease(thr, pc, epfd);
1517  }
1518  int res = REAL(epoll_ctl)(epfd, op, fd, ev);
1519  if (fd >= 0)
1520    FdAccess(thr, pc, fd);
1521  return res;
1522}
1523
1524TSAN_INTERCEPTOR(int, epoll_wait, int epfd, void *ev, int cnt, int timeout) {
1525  SCOPED_TSAN_INTERCEPTOR(epoll_wait, epfd, ev, cnt, timeout);
1526  int res = BLOCK_REAL(epoll_wait)(epfd, ev, cnt, timeout);
1527  if (res > 0 && epfd >= 0) {
1528    FdAcquire(thr, pc, epfd);
1529  }
1530  return res;
1531}
1532
1533TSAN_INTERCEPTOR(int, poll, void *fds, long_t nfds, int timeout) {
1534  SCOPED_TSAN_INTERCEPTOR(poll, fds, nfds, timeout);
1535  int res = BLOCK_REAL(poll)(fds, nfds, timeout);
1536  return res;
1537}
1538
1539static void ALWAYS_INLINE rtl_generic_sighandler(bool sigact, int sig,
1540    my_siginfo_t *info, void *ctx) {
1541  ThreadState *thr = cur_thread();
1542  SignalContext *sctx = SigCtx(thr);
1543  // Don't mess with synchronous signals.
1544  if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL ||
1545      sig == SIGABRT || sig == SIGFPE || sig == SIGPIPE ||
1546      // If we are sending signal to ourselves, we must process it now.
1547      (sctx && sig == sctx->int_signal_send) ||
1548      // If we are in blocking function, we can safely process it now
1549      // (but check if we are in a recursive interceptor,
1550      // i.e. pthread_join()->munmap()).
1551      (sctx && sctx->in_blocking_func == 1 && thr->in_rtl == 1)) {
1552    CHECK(thr->in_rtl == 0 || thr->in_rtl == 1);
1553    int in_rtl = thr->in_rtl;
1554    thr->in_rtl = 0;
1555    CHECK_EQ(thr->in_signal_handler, false);
1556    thr->in_signal_handler = true;
1557    if (sigact)
1558      sigactions[sig].sa_sigaction(sig, info, ctx);
1559    else
1560      sigactions[sig].sa_handler(sig);
1561    CHECK_EQ(thr->in_signal_handler, true);
1562    thr->in_signal_handler = false;
1563    thr->in_rtl = in_rtl;
1564    return;
1565  }
1566
1567  if (sctx == 0)
1568    return;
1569  SignalDesc *signal = &sctx->pending_signals[sig];
1570  if (signal->armed == false) {
1571    signal->armed = true;
1572    signal->sigaction = sigact;
1573    if (info)
1574      internal_memcpy(&signal->siginfo, info, sizeof(*info));
1575    if (ctx)
1576      internal_memcpy(&signal->ctx, ctx, sizeof(signal->ctx));
1577    sctx->pending_signal_count++;
1578  }
1579}
1580
1581static void rtl_sighandler(int sig) {
1582  rtl_generic_sighandler(false, sig, 0, 0);
1583}
1584
1585static void rtl_sigaction(int sig, my_siginfo_t *info, void *ctx) {
1586  rtl_generic_sighandler(true, sig, info, ctx);
1587}
1588
1589TSAN_INTERCEPTOR(int, sigaction, int sig, sigaction_t *act, sigaction_t *old) {
1590  SCOPED_TSAN_INTERCEPTOR(sigaction, sig, act, old);
1591  if (old)
1592    internal_memcpy(old, &sigactions[sig], sizeof(*old));
1593  if (act == 0)
1594    return 0;
1595  internal_memcpy(&sigactions[sig], act, sizeof(*act));
1596  sigaction_t newact;
1597  internal_memcpy(&newact, act, sizeof(newact));
1598  sigfillset(&newact.sa_mask);
1599  if (act->sa_handler != SIG_IGN && act->sa_handler != SIG_DFL) {
1600    if (newact.sa_flags & SA_SIGINFO)
1601      newact.sa_sigaction = rtl_sigaction;
1602    else
1603      newact.sa_handler = rtl_sighandler;
1604  }
1605  int res = REAL(sigaction)(sig, &newact, 0);
1606  return res;
1607}
1608
1609TSAN_INTERCEPTOR(sighandler_t, signal, int sig, sighandler_t h) {
1610  sigaction_t act;
1611  act.sa_handler = h;
1612  REAL(memset)(&act.sa_mask, -1, sizeof(act.sa_mask));
1613  act.sa_flags = 0;
1614  sigaction_t old;
1615  int res = sigaction(sig, &act, &old);
1616  if (res)
1617    return SIG_ERR;
1618  return old.sa_handler;
1619}
1620
1621TSAN_INTERCEPTOR(int, raise, int sig) {
1622  SCOPED_TSAN_INTERCEPTOR(raise, sig);
1623  SignalContext *sctx = SigCtx(thr);
1624  CHECK_NE(sctx, 0);
1625  int prev = sctx->int_signal_send;
1626  sctx->int_signal_send = sig;
1627  int res = REAL(raise)(sig);
1628  CHECK_EQ(sctx->int_signal_send, sig);
1629  sctx->int_signal_send = prev;
1630  return res;
1631}
1632
1633TSAN_INTERCEPTOR(int, kill, int pid, int sig) {
1634  SCOPED_TSAN_INTERCEPTOR(kill, pid, sig);
1635  SignalContext *sctx = SigCtx(thr);
1636  CHECK_NE(sctx, 0);
1637  int prev = sctx->int_signal_send;
1638  if (pid == GetPid()) {
1639    sctx->int_signal_send = sig;
1640  }
1641  int res = REAL(kill)(pid, sig);
1642  if (pid == GetPid()) {
1643    CHECK_EQ(sctx->int_signal_send, sig);
1644    sctx->int_signal_send = prev;
1645  }
1646  return res;
1647}
1648
1649TSAN_INTERCEPTOR(int, pthread_kill, void *tid, int sig) {
1650  SCOPED_TSAN_INTERCEPTOR(pthread_kill, tid, sig);
1651  SignalContext *sctx = SigCtx(thr);
1652  CHECK_NE(sctx, 0);
1653  int prev = sctx->int_signal_send;
1654  if (tid == pthread_self()) {
1655    sctx->int_signal_send = sig;
1656  }
1657  int res = REAL(pthread_kill)(tid, sig);
1658  if (tid == pthread_self()) {
1659    CHECK_EQ(sctx->int_signal_send, sig);
1660    sctx->int_signal_send = prev;
1661  }
1662  return res;
1663}
1664
1665TSAN_INTERCEPTOR(int, gettimeofday, void *tv, void *tz) {
1666  SCOPED_TSAN_INTERCEPTOR(gettimeofday, tv, tz);
1667  // It's intercepted merely to process pending signals.
1668  return REAL(gettimeofday)(tv, tz);
1669}
1670
1671// Linux kernel has a bug that leads to kernel deadlock if a process
1672// maps TBs of memory and then calls mlock().
1673static void MlockIsUnsupported() {
1674  static atomic_uint8_t printed;
1675  if (atomic_exchange(&printed, 1, memory_order_relaxed))
1676    return;
1677  Printf("INFO: ThreadSanitizer ignores mlock/mlockall/munlock/munlockall\n");
1678}
1679
1680TSAN_INTERCEPTOR(int, mlock, const void *addr, uptr len) {
1681  MlockIsUnsupported();
1682  return 0;
1683}
1684
1685TSAN_INTERCEPTOR(int, munlock, const void *addr, uptr len) {
1686  MlockIsUnsupported();
1687  return 0;
1688}
1689
1690TSAN_INTERCEPTOR(int, mlockall, int flags) {
1691  MlockIsUnsupported();
1692  return 0;
1693}
1694
1695TSAN_INTERCEPTOR(int, munlockall, void) {
1696  MlockIsUnsupported();
1697  return 0;
1698}
1699
1700TSAN_INTERCEPTOR(int, fork, int fake) {
1701  SCOPED_TSAN_INTERCEPTOR(fork, fake);
1702  // It's intercepted merely to process pending signals.
1703  int pid = REAL(fork)(fake);
1704  if (pid == 0) {
1705    // child
1706    FdOnFork(thr, pc);
1707  } else if (pid > 0) {
1708    // parent
1709  }
1710  return pid;
1711}
1712
1713struct TsanInterceptorContext {
1714  ThreadState *thr;
1715  const uptr caller_pc;
1716  const uptr pc;
1717};
1718
1719#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \
1720    MemoryAccessRange(((TsanInterceptorContext*)ctx)->thr,  \
1721                      ((TsanInterceptorContext*)ctx)->pc,   \
1722                      (uptr)ptr, size, true)
1723#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size)       \
1724    MemoryAccessRange(((TsanInterceptorContext*)ctx)->thr,  \
1725                      ((TsanInterceptorContext*)ctx)->pc,   \
1726                      (uptr)ptr, size, false)
1727#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \
1728    SCOPED_TSAN_INTERCEPTOR(func, __VA_ARGS__) \
1729    TsanInterceptorContext _ctx = {thr, caller_pc, pc}; \
1730    ctx = (void*)&_ctx; \
1731    (void)ctx;
1732#define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \
1733    FdAcquire(((TsanInterceptorContext*)ctx)->thr, pc, fd)
1734#define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) \
1735    FdRelease(((TsanInterceptorContext*)ctx)->thr, pc, fd)
1736#define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) \
1737    ThreadSetName(((TsanInterceptorContext*)ctx)->thr, name)
1738#include "sanitizer_common/sanitizer_common_interceptors.inc"
1739
1740namespace __tsan {
1741
1742void ProcessPendingSignals(ThreadState *thr) {
1743  CHECK_EQ(thr->in_rtl, 0);
1744  SignalContext *sctx = SigCtx(thr);
1745  if (sctx == 0 || sctx->pending_signal_count == 0 || thr->in_signal_handler)
1746    return;
1747  Context *ctx = CTX();
1748  thr->in_signal_handler = true;
1749  sctx->pending_signal_count = 0;
1750  // These are too big for stack.
1751  static THREADLOCAL sigset_t emptyset, oldset;
1752  sigfillset(&emptyset);
1753  pthread_sigmask(SIG_SETMASK, &emptyset, &oldset);
1754  for (int sig = 0; sig < kSigCount; sig++) {
1755    SignalDesc *signal = &sctx->pending_signals[sig];
1756    if (signal->armed) {
1757      signal->armed = false;
1758      if (sigactions[sig].sa_handler != SIG_DFL
1759          && sigactions[sig].sa_handler != SIG_IGN) {
1760        // Insure that the handler does not spoil errno.
1761        const int saved_errno = errno;
1762        errno = 0;
1763        if (signal->sigaction)
1764          sigactions[sig].sa_sigaction(sig, &signal->siginfo, &signal->ctx);
1765        else
1766          sigactions[sig].sa_handler(sig);
1767        if (flags()->report_bugs && errno != 0) {
1768          ScopedInRtl in_rtl;
1769          __tsan::StackTrace stack;
1770          uptr pc = signal->sigaction ?
1771              (uptr)sigactions[sig].sa_sigaction :
1772              (uptr)sigactions[sig].sa_handler;
1773          stack.Init(&pc, 1);
1774          Lock l(&ctx->thread_mtx);
1775          ScopedReport rep(ReportTypeErrnoInSignal);
1776          if (!IsFiredSuppression(ctx, rep, stack)) {
1777            rep.AddStack(&stack);
1778            OutputReport(ctx, rep, rep.GetReport()->stacks[0]);
1779          }
1780        }
1781        errno = saved_errno;
1782      }
1783    }
1784  }
1785  pthread_sigmask(SIG_SETMASK, &oldset, 0);
1786  CHECK_EQ(thr->in_signal_handler, true);
1787  thr->in_signal_handler = false;
1788}
1789
1790static void unreachable() {
1791  Printf("FATAL: ThreadSanitizer: unreachable called\n");
1792  Die();
1793}
1794
1795void InitializeInterceptors() {
1796  CHECK_GT(cur_thread()->in_rtl, 0);
1797
1798  // We need to setup it early, because functions like dlsym() can call it.
1799  REAL(memset) = internal_memset;
1800  REAL(memcpy) = internal_memcpy;
1801  REAL(memcmp) = internal_memcmp;
1802
1803  SANITIZER_COMMON_INTERCEPTORS_INIT;
1804
1805  TSAN_INTERCEPT(longjmp);
1806  TSAN_INTERCEPT(siglongjmp);
1807
1808  TSAN_INTERCEPT(malloc);
1809  TSAN_INTERCEPT(__libc_memalign);
1810  TSAN_INTERCEPT(calloc);
1811  TSAN_INTERCEPT(realloc);
1812  TSAN_INTERCEPT(free);
1813  TSAN_INTERCEPT(cfree);
1814  TSAN_INTERCEPT(mmap);
1815  TSAN_INTERCEPT(mmap64);
1816  TSAN_INTERCEPT(munmap);
1817  TSAN_INTERCEPT(memalign);
1818  TSAN_INTERCEPT(valloc);
1819  TSAN_INTERCEPT(pvalloc);
1820  TSAN_INTERCEPT(posix_memalign);
1821
1822  TSAN_INTERCEPT(strlen);
1823  TSAN_INTERCEPT(memset);
1824  TSAN_INTERCEPT(memcpy);
1825  TSAN_INTERCEPT(strcmp);
1826  TSAN_INTERCEPT(memchr);
1827  TSAN_INTERCEPT(memrchr);
1828  TSAN_INTERCEPT(memmove);
1829  TSAN_INTERCEPT(memcmp);
1830  TSAN_INTERCEPT(strchr);
1831  TSAN_INTERCEPT(strchrnul);
1832  TSAN_INTERCEPT(strrchr);
1833  TSAN_INTERCEPT(strncmp);
1834  TSAN_INTERCEPT(strcpy);  // NOLINT
1835  TSAN_INTERCEPT(strncpy);
1836  TSAN_INTERCEPT(strstr);
1837
1838  TSAN_INTERCEPT(pthread_create);
1839  TSAN_INTERCEPT(pthread_join);
1840  TSAN_INTERCEPT(pthread_detach);
1841
1842  TSAN_INTERCEPT(pthread_mutex_init);
1843  TSAN_INTERCEPT(pthread_mutex_destroy);
1844  TSAN_INTERCEPT(pthread_mutex_lock);
1845  TSAN_INTERCEPT(pthread_mutex_trylock);
1846  TSAN_INTERCEPT(pthread_mutex_timedlock);
1847  TSAN_INTERCEPT(pthread_mutex_unlock);
1848
1849  TSAN_INTERCEPT(pthread_spin_init);
1850  TSAN_INTERCEPT(pthread_spin_destroy);
1851  TSAN_INTERCEPT(pthread_spin_lock);
1852  TSAN_INTERCEPT(pthread_spin_trylock);
1853  TSAN_INTERCEPT(pthread_spin_unlock);
1854
1855  TSAN_INTERCEPT(pthread_rwlock_init);
1856  TSAN_INTERCEPT(pthread_rwlock_destroy);
1857  TSAN_INTERCEPT(pthread_rwlock_rdlock);
1858  TSAN_INTERCEPT(pthread_rwlock_tryrdlock);
1859  TSAN_INTERCEPT(pthread_rwlock_timedrdlock);
1860  TSAN_INTERCEPT(pthread_rwlock_wrlock);
1861  TSAN_INTERCEPT(pthread_rwlock_trywrlock);
1862  TSAN_INTERCEPT(pthread_rwlock_timedwrlock);
1863  TSAN_INTERCEPT(pthread_rwlock_unlock);
1864
1865  // TSAN_INTERCEPT(pthread_cond_init);
1866  TSAN_INTERCEPT(pthread_cond_destroy);
1867  TSAN_INTERCEPT(pthread_cond_signal);
1868  TSAN_INTERCEPT(pthread_cond_broadcast);
1869  TSAN_INTERCEPT(pthread_cond_wait);
1870  TSAN_INTERCEPT(pthread_cond_timedwait);
1871
1872  TSAN_INTERCEPT(pthread_barrier_init);
1873  TSAN_INTERCEPT(pthread_barrier_destroy);
1874  TSAN_INTERCEPT(pthread_barrier_wait);
1875
1876  TSAN_INTERCEPT(pthread_once);
1877
1878  TSAN_INTERCEPT(sem_init);
1879  TSAN_INTERCEPT(sem_destroy);
1880  TSAN_INTERCEPT(sem_wait);
1881  TSAN_INTERCEPT(sem_trywait);
1882  TSAN_INTERCEPT(sem_timedwait);
1883  TSAN_INTERCEPT(sem_post);
1884  TSAN_INTERCEPT(sem_getvalue);
1885
1886  TSAN_INTERCEPT(stat);
1887  TSAN_INTERCEPT(__xstat);
1888  TSAN_INTERCEPT(stat64);
1889  TSAN_INTERCEPT(__xstat64);
1890  TSAN_INTERCEPT(lstat);
1891  TSAN_INTERCEPT(__lxstat);
1892  TSAN_INTERCEPT(lstat64);
1893  TSAN_INTERCEPT(__lxstat64);
1894  TSAN_INTERCEPT(fstat);
1895  TSAN_INTERCEPT(__fxstat);
1896  TSAN_INTERCEPT(fstat64);
1897  TSAN_INTERCEPT(__fxstat64);
1898  TSAN_INTERCEPT(open);
1899  TSAN_INTERCEPT(open64);
1900  TSAN_INTERCEPT(creat);
1901  TSAN_INTERCEPT(creat64);
1902  TSAN_INTERCEPT(dup);
1903  TSAN_INTERCEPT(dup2);
1904  TSAN_INTERCEPT(dup3);
1905  TSAN_INTERCEPT(eventfd);
1906  TSAN_INTERCEPT(signalfd);
1907  TSAN_INTERCEPT(inotify_init);
1908  TSAN_INTERCEPT(inotify_init1);
1909  TSAN_INTERCEPT(socket);
1910  TSAN_INTERCEPT(socketpair);
1911  TSAN_INTERCEPT(connect);
1912  TSAN_INTERCEPT(accept);
1913  TSAN_INTERCEPT(accept4);
1914  TSAN_INTERCEPT(epoll_create);
1915  TSAN_INTERCEPT(epoll_create1);
1916  TSAN_INTERCEPT(close);
1917  TSAN_INTERCEPT(pipe);
1918  TSAN_INTERCEPT(pipe2);
1919
1920  TSAN_INTERCEPT(readv);
1921  TSAN_INTERCEPT(preadv64);
1922  TSAN_INTERCEPT(writev);
1923  TSAN_INTERCEPT(pwritev64);
1924  TSAN_INTERCEPT(send);
1925  TSAN_INTERCEPT(sendmsg);
1926  TSAN_INTERCEPT(recv);
1927  TSAN_INTERCEPT(recvmsg);
1928
1929  TSAN_INTERCEPT(unlink);
1930  TSAN_INTERCEPT(fopen);
1931  TSAN_INTERCEPT(freopen);
1932  TSAN_INTERCEPT(fclose);
1933  TSAN_INTERCEPT(fread);
1934  TSAN_INTERCEPT(fwrite);
1935  TSAN_INTERCEPT(puts);
1936  TSAN_INTERCEPT(rmdir);
1937  TSAN_INTERCEPT(opendir);
1938
1939  TSAN_INTERCEPT(epoll_ctl);
1940  TSAN_INTERCEPT(epoll_wait);
1941  TSAN_INTERCEPT(poll);
1942
1943  TSAN_INTERCEPT(sigaction);
1944  TSAN_INTERCEPT(signal);
1945  TSAN_INTERCEPT(raise);
1946  TSAN_INTERCEPT(kill);
1947  TSAN_INTERCEPT(pthread_kill);
1948  TSAN_INTERCEPT(sleep);
1949  TSAN_INTERCEPT(usleep);
1950  TSAN_INTERCEPT(nanosleep);
1951  TSAN_INTERCEPT(gettimeofday);
1952
1953  TSAN_INTERCEPT(mlock);
1954  TSAN_INTERCEPT(munlock);
1955  TSAN_INTERCEPT(mlockall);
1956  TSAN_INTERCEPT(munlockall);
1957
1958  TSAN_INTERCEPT(fork);
1959  TSAN_INTERCEPT(on_exit);
1960  TSAN_INTERCEPT(__cxa_atexit);
1961
1962  // Need to setup it, because interceptors check that the function is resolved.
1963  // But atexit is emitted directly into the module, so can't be resolved.
1964  REAL(atexit) = (int(*)(void(*)()))unreachable;
1965  atexit_ctx = new(internal_alloc(MBlockAtExit, sizeof(AtExitContext)))
1966      AtExitContext();
1967
1968  if (REAL(__cxa_atexit)(&finalize, 0, 0)) {
1969    Printf("ThreadSanitizer: failed to setup atexit callback\n");
1970    Die();
1971  }
1972
1973  if (pthread_key_create(&g_thread_finalize_key, &thread_finalize)) {
1974    Printf("ThreadSanitizer: failed to create thread key\n");
1975    Die();
1976  }
1977
1978  FdInit();
1979}
1980
1981void internal_start_thread(void(*func)(void *arg), void *arg) {
1982  void *th;
1983  REAL(pthread_create)(&th, 0, (void*(*)(void *arg))func, arg);
1984  REAL(pthread_detach)(th);
1985}
1986
1987}  // namespace __tsan
1988