tsan_interceptors.cc revision e7718bcc1372d25fc21100e403cf41b166d42f9b
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.inc 14//===----------------------------------------------------------------------===// 15 16#include "sanitizer_common/sanitizer_atomic.h" 17#include "sanitizer_common/sanitizer_libc.h" 18#include "sanitizer_common/sanitizer_linux.h" 19#include "sanitizer_common/sanitizer_platform_limits_posix.h" 20#include "sanitizer_common/sanitizer_placement_new.h" 21#include "sanitizer_common/sanitizer_stacktrace.h" 22#include "interception/interception.h" 23#include "tsan_interface.h" 24#include "tsan_platform.h" 25#include "tsan_rtl.h" 26#include "tsan_mman.h" 27#include "tsan_fd.h" 28 29using namespace __tsan; // NOLINT 30 31const int kSigCount = 64; 32 33struct my_siginfo_t { 34 // The size is determined by looking at sizeof of real siginfo_t on linux. 35 u64 opaque[128 / sizeof(u64)]; 36}; 37 38struct sigset_t { 39 // The size is determined by looking at sizeof of real sigset_t on linux. 40 u64 val[128 / sizeof(u64)]; 41}; 42 43struct ucontext_t { 44 // The size is determined by looking at sizeof of real ucontext_t on linux. 45 u64 opaque[936 / sizeof(u64) + 1]; 46}; 47 48extern "C" int pthread_attr_init(void *attr); 49extern "C" int pthread_attr_destroy(void *attr); 50extern "C" int pthread_attr_getdetachstate(void *attr, int *v); 51extern "C" int pthread_attr_setstacksize(void *attr, uptr stacksize); 52extern "C" int pthread_attr_getstacksize(void *attr, uptr *stacksize); 53extern "C" int pthread_key_create(unsigned *key, void (*destructor)(void* v)); 54extern "C" int pthread_setspecific(unsigned key, const void *v); 55extern "C" int pthread_mutexattr_gettype(void *a, int *type); 56extern "C" int pthread_yield(); 57extern "C" int pthread_sigmask(int how, const sigset_t *set, sigset_t *oldset); 58extern "C" int sigfillset(sigset_t *set); 59extern "C" void *pthread_self(); 60extern "C" void _exit(int status); 61extern "C" int *__errno_location(); 62extern "C" int fileno_unlocked(void *stream); 63extern "C" void *__libc_malloc(uptr size); 64extern "C" void *__libc_calloc(uptr size, uptr n); 65extern "C" void *__libc_realloc(void *ptr, uptr size); 66extern "C" void __libc_free(void *ptr); 67extern "C" int mallopt(int param, int value); 68const int PTHREAD_MUTEX_RECURSIVE = 1; 69const int PTHREAD_MUTEX_RECURSIVE_NP = 1; 70const int kPthreadAttrSize = 56; 71const int EINVAL = 22; 72const int EBUSY = 16; 73const int EPOLL_CTL_ADD = 1; 74const int SIGILL = 4; 75const int SIGABRT = 6; 76const int SIGFPE = 8; 77const int SIGSEGV = 11; 78const int SIGPIPE = 13; 79const int SIGBUS = 7; 80void *const MAP_FAILED = (void*)-1; 81const int PTHREAD_BARRIER_SERIAL_THREAD = -1; 82const int MAP_FIXED = 0x10; 83typedef long long_t; // NOLINT 84 85// From /usr/include/unistd.h 86# define F_ULOCK 0 /* Unlock a previously locked region. */ 87# define F_LOCK 1 /* Lock a region for exclusive use. */ 88# define F_TLOCK 2 /* Test and lock a region for exclusive use. */ 89# define F_TEST 3 /* Test a region for other processes locks. */ 90 91typedef void (*sighandler_t)(int sig); 92 93#define errno (*__errno_location()) 94 95struct sigaction_t { 96 union { 97 sighandler_t sa_handler; 98 void (*sa_sigaction)(int sig, my_siginfo_t *siginfo, void *uctx); 99 }; 100 sigset_t sa_mask; 101 int sa_flags; 102 void (*sa_restorer)(); 103}; 104 105const sighandler_t SIG_DFL = (sighandler_t)0; 106const sighandler_t SIG_IGN = (sighandler_t)1; 107const sighandler_t SIG_ERR = (sighandler_t)-1; 108const int SA_SIGINFO = 4; 109const int SIG_SETMASK = 2; 110 111namespace std { 112struct nothrow_t {}; 113} // namespace std 114 115static sigaction_t sigactions[kSigCount]; 116 117namespace __tsan { 118struct SignalDesc { 119 bool armed; 120 bool sigaction; 121 my_siginfo_t siginfo; 122 ucontext_t ctx; 123}; 124 125struct SignalContext { 126 int in_blocking_func; 127 int int_signal_send; 128 int pending_signal_count; 129 SignalDesc pending_signals[kSigCount]; 130}; 131} // namespace __tsan 132 133static SignalContext *SigCtx(ThreadState *thr) { 134 SignalContext *ctx = (SignalContext*)thr->signal_ctx; 135 if (ctx == 0 && thr->is_alive) { 136 ScopedInRtl in_rtl; 137 ctx = (SignalContext*)MmapOrDie(sizeof(*ctx), "SignalContext"); 138 MemoryResetRange(thr, (uptr)&SigCtx, (uptr)ctx, sizeof(*ctx)); 139 thr->signal_ctx = ctx; 140 } 141 return ctx; 142} 143 144static unsigned g_thread_finalize_key; 145 146class ScopedInterceptor { 147 public: 148 ScopedInterceptor(ThreadState *thr, const char *fname, uptr pc); 149 ~ScopedInterceptor(); 150 private: 151 ThreadState *const thr_; 152 const int in_rtl_; 153}; 154 155ScopedInterceptor::ScopedInterceptor(ThreadState *thr, const char *fname, 156 uptr pc) 157 : thr_(thr) 158 , in_rtl_(thr->in_rtl) { 159 if (thr_->in_rtl == 0) { 160 Initialize(thr); 161 FuncEntry(thr, pc); 162 thr_->in_rtl++; 163 DPrintf("#%d: intercept %s()\n", thr_->tid, fname); 164 } else { 165 thr_->in_rtl++; 166 } 167} 168 169ScopedInterceptor::~ScopedInterceptor() { 170 thr_->in_rtl--; 171 if (thr_->in_rtl == 0) { 172 FuncExit(thr_); 173 ProcessPendingSignals(thr_); 174 } 175 CHECK_EQ(in_rtl_, thr_->in_rtl); 176} 177 178#define SCOPED_INTERCEPTOR_RAW(func, ...) \ 179 ThreadState *thr = cur_thread(); \ 180 StatInc(thr, StatInterceptor); \ 181 StatInc(thr, StatInt_##func); \ 182 const uptr caller_pc = GET_CALLER_PC(); \ 183 ScopedInterceptor si(thr, #func, caller_pc); \ 184 const uptr pc = __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 298TSAN_INTERCEPTOR(int, atexit, void (*f)()) { 299 if (cur_thread()->in_symbolizer) 300 return 0; 301 SCOPED_TSAN_INTERCEPTOR(atexit, f); 302 return atexit_ctx->atexit(thr, pc, false, (void(*)())f, 0); 303} 304 305TSAN_INTERCEPTOR(int, on_exit, void(*f)(int, void*), void *arg) { 306 if (cur_thread()->in_symbolizer) 307 return 0; 308 SCOPED_TSAN_INTERCEPTOR(on_exit, f, arg); 309 return atexit_ctx->atexit(thr, pc, true, (void(*)())f, arg); 310} 311 312TSAN_INTERCEPTOR(int, __cxa_atexit, void (*f)(void *a), void *arg, void *dso) { 313 if (cur_thread()->in_symbolizer) 314 return 0; 315 SCOPED_TSAN_INTERCEPTOR(__cxa_atexit, f, arg, dso); 316 if (dso) 317 return REAL(__cxa_atexit)(f, arg, dso); 318 return atexit_ctx->atexit(thr, pc, false, (void(*)())f, arg); 319} 320 321// Cleanup old bufs. 322static void JmpBufGarbageCollect(ThreadState *thr, uptr sp) { 323 for (uptr i = 0; i < thr->jmp_bufs.Size(); i++) { 324 JmpBuf *buf = &thr->jmp_bufs[i]; 325 if (buf->sp <= sp) { 326 uptr sz = thr->jmp_bufs.Size(); 327 thr->jmp_bufs[i] = thr->jmp_bufs[sz - 1]; 328 thr->jmp_bufs.PopBack(); 329 i--; 330 } 331 } 332} 333 334static void SetJmp(ThreadState *thr, uptr sp, uptr mangled_sp) { 335 if (thr->shadow_stack_pos == 0) // called from libc guts during bootstrap 336 return; 337 // Cleanup old bufs. 338 JmpBufGarbageCollect(thr, sp); 339 // Remember the buf. 340 JmpBuf *buf = thr->jmp_bufs.PushBack(); 341 buf->sp = sp; 342 buf->mangled_sp = mangled_sp; 343 buf->shadow_stack_pos = thr->shadow_stack_pos; 344} 345 346static void LongJmp(ThreadState *thr, uptr *env) { 347 uptr mangled_sp = env[6]; 348 // Find the saved buf by mangled_sp. 349 for (uptr i = 0; i < thr->jmp_bufs.Size(); i++) { 350 JmpBuf *buf = &thr->jmp_bufs[i]; 351 if (buf->mangled_sp == mangled_sp) { 352 CHECK_GE(thr->shadow_stack_pos, buf->shadow_stack_pos); 353 // Unwind the stack. 354 while (thr->shadow_stack_pos > buf->shadow_stack_pos) 355 FuncExit(thr); 356 JmpBufGarbageCollect(thr, buf->sp - 1); // do not collect buf->sp 357 return; 358 } 359 } 360 Printf("ThreadSanitizer: can't find longjmp buf\n"); 361 CHECK(0); 362} 363 364extern "C" void __tsan_setjmp(uptr sp, uptr mangled_sp) { 365 ScopedInRtl in_rtl; 366 SetJmp(cur_thread(), sp, mangled_sp); 367} 368 369// Not called. Merely to satisfy TSAN_INTERCEPT(). 370extern "C" int __interceptor_setjmp(void *env) { 371 CHECK(0); 372 return 0; 373} 374 375extern "C" int __interceptor__setjmp(void *env) { 376 CHECK(0); 377 return 0; 378} 379 380extern "C" int __interceptor_sigsetjmp(void *env) { 381 CHECK(0); 382 return 0; 383} 384 385extern "C" int __interceptor___sigsetjmp(void *env) { 386 CHECK(0); 387 return 0; 388} 389 390extern "C" int setjmp(void *env); 391extern "C" int _setjmp(void *env); 392extern "C" int sigsetjmp(void *env); 393extern "C" int __sigsetjmp(void *env); 394DEFINE_REAL(int, setjmp, void *env) 395DEFINE_REAL(int, _setjmp, void *env) 396DEFINE_REAL(int, sigsetjmp, void *env) 397DEFINE_REAL(int, __sigsetjmp, void *env) 398 399TSAN_INTERCEPTOR(void, longjmp, uptr *env, int val) { 400 { 401 SCOPED_TSAN_INTERCEPTOR(longjmp, env, val); 402 } 403 LongJmp(cur_thread(), env); 404 REAL(longjmp)(env, val); 405} 406 407TSAN_INTERCEPTOR(void, siglongjmp, uptr *env, int val) { 408 { 409 SCOPED_TSAN_INTERCEPTOR(siglongjmp, env, val); 410 } 411 LongJmp(cur_thread(), env); 412 REAL(siglongjmp)(env, val); 413} 414 415TSAN_INTERCEPTOR(void*, malloc, uptr size) { 416 if (cur_thread()->in_symbolizer) 417 return __libc_malloc(size); 418 void *p = 0; 419 { 420 SCOPED_INTERCEPTOR_RAW(malloc, size); 421 p = user_alloc(thr, pc, size); 422 } 423 invoke_malloc_hook(p, size); 424 return p; 425} 426 427TSAN_INTERCEPTOR(void*, __libc_memalign, uptr align, uptr sz) { 428 SCOPED_TSAN_INTERCEPTOR(__libc_memalign, align, sz); 429 return user_alloc(thr, pc, sz, align); 430} 431 432TSAN_INTERCEPTOR(void*, calloc, uptr size, uptr n) { 433 if (cur_thread()->in_symbolizer) 434 return __libc_calloc(size, n); 435 if (__sanitizer::CallocShouldReturnNullDueToOverflow(size, n)) return 0; 436 void *p = 0; 437 { 438 SCOPED_INTERCEPTOR_RAW(calloc, size, n); 439 p = user_alloc(thr, pc, n * size); 440 if (p) 441 internal_memset(p, 0, n * size); 442 } 443 invoke_malloc_hook(p, n * size); 444 return p; 445} 446 447TSAN_INTERCEPTOR(void*, realloc, void *p, uptr size) { 448 if (cur_thread()->in_symbolizer) 449 return __libc_realloc(p, size); 450 if (p) 451 invoke_free_hook(p); 452 { 453 SCOPED_INTERCEPTOR_RAW(realloc, p, size); 454 p = user_realloc(thr, pc, p, size); 455 } 456 invoke_malloc_hook(p, size); 457 return p; 458} 459 460TSAN_INTERCEPTOR(void, free, void *p) { 461 if (p == 0) 462 return; 463 if (cur_thread()->in_symbolizer) 464 return __libc_free(p); 465 invoke_free_hook(p); 466 SCOPED_INTERCEPTOR_RAW(free, p); 467 user_free(thr, pc, p); 468} 469 470TSAN_INTERCEPTOR(void, cfree, void *p) { 471 if (p == 0) 472 return; 473 if (cur_thread()->in_symbolizer) 474 return __libc_free(p); 475 invoke_free_hook(p); 476 SCOPED_INTERCEPTOR_RAW(cfree, p); 477 user_free(thr, pc, p); 478} 479 480TSAN_INTERCEPTOR(uptr, malloc_usable_size, void *p) { 481 SCOPED_INTERCEPTOR_RAW(malloc_usable_size, p); 482 return user_alloc_usable_size(thr, pc, p); 483} 484 485#define OPERATOR_NEW_BODY(mangled_name) \ 486 if (cur_thread()->in_symbolizer) \ 487 return __libc_malloc(size); \ 488 void *p = 0; \ 489 { \ 490 SCOPED_INTERCEPTOR_RAW(mangled_name, size); \ 491 p = user_alloc(thr, pc, size); \ 492 } \ 493 invoke_malloc_hook(p, size); \ 494 return p; 495 496void *operator new(__sanitizer::uptr size) { 497 OPERATOR_NEW_BODY(_Znwm); 498} 499void *operator new[](__sanitizer::uptr size) { 500 OPERATOR_NEW_BODY(_Znam); 501} 502void *operator new(__sanitizer::uptr size, std::nothrow_t const&) { 503 OPERATOR_NEW_BODY(_ZnwmRKSt9nothrow_t); 504} 505void *operator new[](__sanitizer::uptr size, std::nothrow_t const&) { 506 OPERATOR_NEW_BODY(_ZnamRKSt9nothrow_t); 507} 508 509#define OPERATOR_DELETE_BODY(mangled_name) \ 510 if (ptr == 0) return; \ 511 if (cur_thread()->in_symbolizer) \ 512 return __libc_free(ptr); \ 513 invoke_free_hook(ptr); \ 514 SCOPED_INTERCEPTOR_RAW(mangled_name, ptr); \ 515 user_free(thr, pc, ptr); 516 517void operator delete(void *ptr) { 518 OPERATOR_DELETE_BODY(_ZdlPv); 519} 520void operator delete[](void *ptr) { 521 OPERATOR_DELETE_BODY(_ZdlPvRKSt9nothrow_t); 522} 523void operator delete(void *ptr, std::nothrow_t const&) { 524 OPERATOR_DELETE_BODY(_ZdaPv); 525} 526void operator delete[](void *ptr, std::nothrow_t const&) { 527 OPERATOR_DELETE_BODY(_ZdaPvRKSt9nothrow_t); 528} 529 530TSAN_INTERCEPTOR(uptr, strlen, const char *s) { 531 SCOPED_TSAN_INTERCEPTOR(strlen, s); 532 uptr len = internal_strlen(s); 533 MemoryAccessRange(thr, pc, (uptr)s, len + 1, false); 534 return len; 535} 536 537TSAN_INTERCEPTOR(void*, memset, void *dst, int v, uptr size) { 538 SCOPED_TSAN_INTERCEPTOR(memset, dst, v, size); 539 MemoryAccessRange(thr, pc, (uptr)dst, size, true); 540 return internal_memset(dst, v, size); 541} 542 543TSAN_INTERCEPTOR(void*, memcpy, void *dst, const void *src, uptr size) { 544 SCOPED_TSAN_INTERCEPTOR(memcpy, dst, src, size); 545 MemoryAccessRange(thr, pc, (uptr)dst, size, true); 546 MemoryAccessRange(thr, pc, (uptr)src, size, false); 547 return internal_memcpy(dst, src, size); 548} 549 550TSAN_INTERCEPTOR(int, memcmp, const void *s1, const void *s2, uptr n) { 551 SCOPED_TSAN_INTERCEPTOR(memcmp, s1, s2, n); 552 int res = 0; 553 uptr len = 0; 554 for (; len < n; len++) { 555 if ((res = ((unsigned char*)s1)[len] - ((unsigned char*)s2)[len])) 556 break; 557 } 558 MemoryAccessRange(thr, pc, (uptr)s1, len < n ? len + 1 : n, false); 559 MemoryAccessRange(thr, pc, (uptr)s2, len < n ? len + 1 : n, false); 560 return res; 561} 562 563TSAN_INTERCEPTOR(int, strcmp, const char *s1, const char *s2) { 564 SCOPED_TSAN_INTERCEPTOR(strcmp, s1, s2); 565 uptr len = 0; 566 for (; s1[len] && s2[len]; len++) { 567 if (s1[len] != s2[len]) 568 break; 569 } 570 MemoryAccessRange(thr, pc, (uptr)s1, len + 1, false); 571 MemoryAccessRange(thr, pc, (uptr)s2, len + 1, false); 572 return s1[len] - s2[len]; 573} 574 575TSAN_INTERCEPTOR(int, strncmp, const char *s1, const char *s2, uptr n) { 576 SCOPED_TSAN_INTERCEPTOR(strncmp, s1, s2, n); 577 uptr len = 0; 578 for (; len < n && s1[len] && s2[len]; len++) { 579 if (s1[len] != s2[len]) 580 break; 581 } 582 MemoryAccessRange(thr, pc, (uptr)s1, len < n ? len + 1 : n, false); 583 MemoryAccessRange(thr, pc, (uptr)s2, len < n ? len + 1 : n, false); 584 return len == n ? 0 : s1[len] - s2[len]; 585} 586 587TSAN_INTERCEPTOR(void*, memchr, void *s, int c, uptr n) { 588 SCOPED_TSAN_INTERCEPTOR(memchr, s, c, n); 589 void *res = REAL(memchr)(s, c, n); 590 uptr len = res ? (char*)res - (char*)s + 1 : n; 591 MemoryAccessRange(thr, pc, (uptr)s, len, false); 592 return res; 593} 594 595TSAN_INTERCEPTOR(void*, memrchr, char *s, int c, uptr n) { 596 SCOPED_TSAN_INTERCEPTOR(memrchr, s, c, n); 597 MemoryAccessRange(thr, pc, (uptr)s, n, false); 598 return REAL(memrchr)(s, c, n); 599} 600 601TSAN_INTERCEPTOR(void*, memmove, void *dst, void *src, uptr n) { 602 SCOPED_TSAN_INTERCEPTOR(memmove, dst, src, n); 603 MemoryAccessRange(thr, pc, (uptr)dst, n, true); 604 MemoryAccessRange(thr, pc, (uptr)src, n, false); 605 return REAL(memmove)(dst, src, n); 606} 607 608TSAN_INTERCEPTOR(char*, strchr, char *s, int c) { 609 SCOPED_TSAN_INTERCEPTOR(strchr, s, c); 610 char *res = REAL(strchr)(s, c); 611 uptr len = res ? (char*)res - (char*)s + 1 : internal_strlen(s) + 1; 612 MemoryAccessRange(thr, pc, (uptr)s, len, false); 613 return res; 614} 615 616TSAN_INTERCEPTOR(char*, strchrnul, char *s, int c) { 617 SCOPED_TSAN_INTERCEPTOR(strchrnul, s, c); 618 char *res = REAL(strchrnul)(s, c); 619 uptr len = (char*)res - (char*)s + 1; 620 MemoryAccessRange(thr, pc, (uptr)s, len, false); 621 return res; 622} 623 624TSAN_INTERCEPTOR(char*, strrchr, char *s, int c) { 625 SCOPED_TSAN_INTERCEPTOR(strrchr, s, c); 626 MemoryAccessRange(thr, pc, (uptr)s, internal_strlen(s) + 1, false); 627 return REAL(strrchr)(s, c); 628} 629 630TSAN_INTERCEPTOR(char*, strcpy, char *dst, const char *src) { // NOLINT 631 SCOPED_TSAN_INTERCEPTOR(strcpy, dst, src); // NOLINT 632 uptr srclen = internal_strlen(src); 633 MemoryAccessRange(thr, pc, (uptr)dst, srclen + 1, true); 634 MemoryAccessRange(thr, pc, (uptr)src, srclen + 1, false); 635 return REAL(strcpy)(dst, src); // NOLINT 636} 637 638TSAN_INTERCEPTOR(char*, strncpy, char *dst, char *src, uptr n) { 639 SCOPED_TSAN_INTERCEPTOR(strncpy, dst, src, n); 640 uptr srclen = internal_strnlen(src, n); 641 MemoryAccessRange(thr, pc, (uptr)dst, n, true); 642 MemoryAccessRange(thr, pc, (uptr)src, min(srclen + 1, n), false); 643 return REAL(strncpy)(dst, src, n); 644} 645 646TSAN_INTERCEPTOR(const char*, strstr, const char *s1, const char *s2) { 647 SCOPED_TSAN_INTERCEPTOR(strstr, s1, s2); 648 const char *res = REAL(strstr)(s1, s2); 649 uptr len1 = internal_strlen(s1); 650 uptr len2 = internal_strlen(s2); 651 MemoryAccessRange(thr, pc, (uptr)s1, len1 + 1, false); 652 MemoryAccessRange(thr, pc, (uptr)s2, len2 + 1, false); 653 return res; 654} 655 656static bool fix_mmap_addr(void **addr, long_t sz, int flags) { 657 if (*addr) { 658 if (!IsAppMem((uptr)*addr) || !IsAppMem((uptr)*addr + sz - 1)) { 659 if (flags & MAP_FIXED) { 660 errno = EINVAL; 661 return false; 662 } else { 663 *addr = 0; 664 } 665 } 666 } 667 return true; 668} 669 670TSAN_INTERCEPTOR(void*, mmap, void *addr, long_t sz, int prot, 671 int flags, int fd, unsigned off) { 672 SCOPED_TSAN_INTERCEPTOR(mmap, addr, sz, prot, flags, fd, off); 673 if (!fix_mmap_addr(&addr, sz, flags)) 674 return MAP_FAILED; 675 void *res = REAL(mmap)(addr, sz, prot, flags, fd, off); 676 if (res != MAP_FAILED) { 677 if (fd > 0) 678 FdAccess(thr, pc, fd); 679 MemoryRangeImitateWrite(thr, pc, (uptr)res, sz); 680 } 681 return res; 682} 683 684TSAN_INTERCEPTOR(void*, mmap64, void *addr, long_t sz, int prot, 685 int flags, int fd, u64 off) { 686 SCOPED_TSAN_INTERCEPTOR(mmap64, addr, sz, prot, flags, fd, off); 687 if (!fix_mmap_addr(&addr, sz, flags)) 688 return MAP_FAILED; 689 void *res = REAL(mmap64)(addr, sz, prot, flags, fd, off); 690 if (res != MAP_FAILED) { 691 if (fd > 0) 692 FdAccess(thr, pc, fd); 693 MemoryRangeImitateWrite(thr, pc, (uptr)res, sz); 694 } 695 return res; 696} 697 698TSAN_INTERCEPTOR(int, munmap, void *addr, long_t sz) { 699 SCOPED_TSAN_INTERCEPTOR(munmap, addr, sz); 700 DontNeedShadowFor((uptr)addr, sz); 701 int res = REAL(munmap)(addr, sz); 702 return res; 703} 704 705TSAN_INTERCEPTOR(void*, memalign, uptr align, uptr sz) { 706 SCOPED_TSAN_INTERCEPTOR(memalign, align, sz); 707 return user_alloc(thr, pc, sz, align); 708} 709 710TSAN_INTERCEPTOR(void*, valloc, uptr sz) { 711 SCOPED_TSAN_INTERCEPTOR(valloc, sz); 712 return user_alloc(thr, pc, sz, GetPageSizeCached()); 713} 714 715TSAN_INTERCEPTOR(void*, pvalloc, uptr sz) { 716 SCOPED_TSAN_INTERCEPTOR(pvalloc, sz); 717 sz = RoundUp(sz, GetPageSizeCached()); 718 return user_alloc(thr, pc, sz, GetPageSizeCached()); 719} 720 721TSAN_INTERCEPTOR(int, posix_memalign, void **memptr, uptr align, uptr sz) { 722 SCOPED_TSAN_INTERCEPTOR(posix_memalign, memptr, align, sz); 723 *memptr = user_alloc(thr, pc, sz, align); 724 return 0; 725} 726 727// Used in thread-safe function static initialization. 728extern "C" int INTERFACE_ATTRIBUTE __cxa_guard_acquire(atomic_uint32_t *g) { 729 SCOPED_INTERCEPTOR_RAW(__cxa_guard_acquire, g); 730 for (;;) { 731 u32 cmp = atomic_load(g, memory_order_acquire); 732 if (cmp == 0) { 733 if (atomic_compare_exchange_strong(g, &cmp, 1<<16, memory_order_relaxed)) 734 return 1; 735 } else if (cmp == 1) { 736 Acquire(thr, pc, (uptr)g); 737 return 0; 738 } else { 739 internal_sched_yield(); 740 } 741 } 742} 743 744extern "C" void INTERFACE_ATTRIBUTE __cxa_guard_release(atomic_uint32_t *g) { 745 SCOPED_INTERCEPTOR_RAW(__cxa_guard_release, g); 746 Release(thr, pc, (uptr)g); 747 atomic_store(g, 1, memory_order_release); 748} 749 750extern "C" void INTERFACE_ATTRIBUTE __cxa_guard_abort(atomic_uint32_t *g) { 751 SCOPED_INTERCEPTOR_RAW(__cxa_guard_abort, g); 752 atomic_store(g, 0, memory_order_relaxed); 753} 754 755static void thread_finalize(void *v) { 756 uptr iter = (uptr)v; 757 if (iter > 1) { 758 if (pthread_setspecific(g_thread_finalize_key, (void*)(iter - 1))) { 759 Printf("ThreadSanitizer: failed to set thread key\n"); 760 Die(); 761 } 762 return; 763 } 764 { 765 ScopedInRtl in_rtl; 766 ThreadState *thr = cur_thread(); 767 ThreadFinish(thr); 768 SignalContext *sctx = thr->signal_ctx; 769 if (sctx) { 770 thr->signal_ctx = 0; 771 UnmapOrDie(sctx, sizeof(*sctx)); 772 } 773 } 774} 775 776 777struct ThreadParam { 778 void* (*callback)(void *arg); 779 void *param; 780 atomic_uintptr_t tid; 781}; 782 783extern "C" void *__tsan_thread_start_func(void *arg) { 784 ThreadParam *p = (ThreadParam*)arg; 785 void* (*callback)(void *arg) = p->callback; 786 void *param = p->param; 787 int tid = 0; 788 { 789 ThreadState *thr = cur_thread(); 790 ScopedInRtl in_rtl; 791 if (pthread_setspecific(g_thread_finalize_key, (void*)4)) { 792 Printf("ThreadSanitizer: failed to set thread key\n"); 793 Die(); 794 } 795 while ((tid = atomic_load(&p->tid, memory_order_acquire)) == 0) 796 pthread_yield(); 797 atomic_store(&p->tid, 0, memory_order_release); 798 ThreadStart(thr, tid, GetTid()); 799 CHECK_EQ(thr->in_rtl, 1); 800 } 801 void *res = callback(param); 802 // Prevent the callback from being tail called, 803 // it mixes up stack traces. 804 volatile int foo = 42; 805 foo++; 806 return res; 807} 808 809TSAN_INTERCEPTOR(int, pthread_create, 810 void *th, void *attr, void *(*callback)(void*), void * param) { 811 SCOPED_TSAN_INTERCEPTOR(pthread_create, th, attr, callback, param); 812 __sanitizer_pthread_attr_t myattr; 813 if (attr == 0) { 814 pthread_attr_init(&myattr); 815 attr = &myattr; 816 } 817 int detached = 0; 818 pthread_attr_getdetachstate(attr, &detached); 819 820#if defined(TSAN_DEBUG_OUTPUT) 821 int verbosity = (TSAN_DEBUG_OUTPUT); 822#else 823 int verbosity = 0; 824#endif 825 AdjustStackSizeLinux(attr, verbosity); 826 827 ThreadParam p; 828 p.callback = callback; 829 p.param = param; 830 atomic_store(&p.tid, 0, memory_order_relaxed); 831 int res = REAL(pthread_create)(th, attr, __tsan_thread_start_func, &p); 832 if (res == 0) { 833 int tid = ThreadCreate(thr, pc, *(uptr*)th, detached); 834 CHECK_NE(tid, 0); 835 atomic_store(&p.tid, tid, memory_order_release); 836 while (atomic_load(&p.tid, memory_order_acquire) != 0) 837 pthread_yield(); 838 } 839 if (attr == &myattr) 840 pthread_attr_destroy(&myattr); 841 return res; 842} 843 844TSAN_INTERCEPTOR(int, pthread_join, void *th, void **ret) { 845 SCOPED_TSAN_INTERCEPTOR(pthread_join, th, ret); 846 int tid = ThreadTid(thr, pc, (uptr)th); 847 int res = BLOCK_REAL(pthread_join)(th, ret); 848 if (res == 0) { 849 ThreadJoin(thr, pc, tid); 850 } 851 return res; 852} 853 854TSAN_INTERCEPTOR(int, pthread_detach, void *th) { 855 SCOPED_TSAN_INTERCEPTOR(pthread_detach, th); 856 int tid = ThreadTid(thr, pc, (uptr)th); 857 int res = REAL(pthread_detach)(th); 858 if (res == 0) { 859 ThreadDetach(thr, pc, tid); 860 } 861 return res; 862} 863 864TSAN_INTERCEPTOR(int, pthread_mutex_init, void *m, void *a) { 865 SCOPED_TSAN_INTERCEPTOR(pthread_mutex_init, m, a); 866 int res = REAL(pthread_mutex_init)(m, a); 867 if (res == 0) { 868 bool recursive = false; 869 if (a) { 870 int type = 0; 871 if (pthread_mutexattr_gettype(a, &type) == 0) 872 recursive = (type == PTHREAD_MUTEX_RECURSIVE 873 || type == PTHREAD_MUTEX_RECURSIVE_NP); 874 } 875 MutexCreate(thr, pc, (uptr)m, false, recursive, false); 876 } 877 return res; 878} 879 880TSAN_INTERCEPTOR(int, pthread_mutex_destroy, void *m) { 881 SCOPED_TSAN_INTERCEPTOR(pthread_mutex_destroy, m); 882 int res = REAL(pthread_mutex_destroy)(m); 883 if (res == 0 || res == EBUSY) { 884 MutexDestroy(thr, pc, (uptr)m); 885 } 886 return res; 887} 888 889TSAN_INTERCEPTOR(int, pthread_mutex_lock, void *m) { 890 SCOPED_TSAN_INTERCEPTOR(pthread_mutex_lock, m); 891 int res = REAL(pthread_mutex_lock)(m); 892 if (res == 0) { 893 MutexLock(thr, pc, (uptr)m); 894 } 895 return res; 896} 897 898TSAN_INTERCEPTOR(int, pthread_mutex_trylock, void *m) { 899 SCOPED_TSAN_INTERCEPTOR(pthread_mutex_trylock, m); 900 int res = REAL(pthread_mutex_trylock)(m); 901 if (res == 0) { 902 MutexLock(thr, pc, (uptr)m); 903 } 904 return res; 905} 906 907TSAN_INTERCEPTOR(int, pthread_mutex_timedlock, void *m, void *abstime) { 908 SCOPED_TSAN_INTERCEPTOR(pthread_mutex_timedlock, m, abstime); 909 int res = REAL(pthread_mutex_timedlock)(m, abstime); 910 if (res == 0) { 911 MutexLock(thr, pc, (uptr)m); 912 } 913 return res; 914} 915 916TSAN_INTERCEPTOR(int, pthread_mutex_unlock, void *m) { 917 SCOPED_TSAN_INTERCEPTOR(pthread_mutex_unlock, m); 918 MutexUnlock(thr, pc, (uptr)m); 919 int res = REAL(pthread_mutex_unlock)(m); 920 return res; 921} 922 923TSAN_INTERCEPTOR(int, pthread_spin_init, void *m, int pshared) { 924 SCOPED_TSAN_INTERCEPTOR(pthread_spin_init, m, pshared); 925 int res = REAL(pthread_spin_init)(m, pshared); 926 if (res == 0) { 927 MutexCreate(thr, pc, (uptr)m, false, false, false); 928 } 929 return res; 930} 931 932TSAN_INTERCEPTOR(int, pthread_spin_destroy, void *m) { 933 SCOPED_TSAN_INTERCEPTOR(pthread_spin_destroy, m); 934 int res = REAL(pthread_spin_destroy)(m); 935 if (res == 0) { 936 MutexDestroy(thr, pc, (uptr)m); 937 } 938 return res; 939} 940 941TSAN_INTERCEPTOR(int, pthread_spin_lock, void *m) { 942 SCOPED_TSAN_INTERCEPTOR(pthread_spin_lock, m); 943 int res = REAL(pthread_spin_lock)(m); 944 if (res == 0) { 945 MutexLock(thr, pc, (uptr)m); 946 } 947 return res; 948} 949 950TSAN_INTERCEPTOR(int, pthread_spin_trylock, void *m) { 951 SCOPED_TSAN_INTERCEPTOR(pthread_spin_trylock, m); 952 int res = REAL(pthread_spin_trylock)(m); 953 if (res == 0) { 954 MutexLock(thr, pc, (uptr)m); 955 } 956 return res; 957} 958 959TSAN_INTERCEPTOR(int, pthread_spin_unlock, void *m) { 960 SCOPED_TSAN_INTERCEPTOR(pthread_spin_unlock, m); 961 MutexUnlock(thr, pc, (uptr)m); 962 int res = REAL(pthread_spin_unlock)(m); 963 return res; 964} 965 966TSAN_INTERCEPTOR(int, pthread_rwlock_init, void *m, void *a) { 967 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_init, m, a); 968 int res = REAL(pthread_rwlock_init)(m, a); 969 if (res == 0) { 970 MutexCreate(thr, pc, (uptr)m, true, false, false); 971 } 972 return res; 973} 974 975TSAN_INTERCEPTOR(int, pthread_rwlock_destroy, void *m) { 976 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_destroy, m); 977 int res = REAL(pthread_rwlock_destroy)(m); 978 if (res == 0) { 979 MutexDestroy(thr, pc, (uptr)m); 980 } 981 return res; 982} 983 984TSAN_INTERCEPTOR(int, pthread_rwlock_rdlock, void *m) { 985 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_rdlock, m); 986 int res = REAL(pthread_rwlock_rdlock)(m); 987 if (res == 0) { 988 MutexReadLock(thr, pc, (uptr)m); 989 } 990 return res; 991} 992 993TSAN_INTERCEPTOR(int, pthread_rwlock_tryrdlock, void *m) { 994 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_tryrdlock, m); 995 int res = REAL(pthread_rwlock_tryrdlock)(m); 996 if (res == 0) { 997 MutexReadLock(thr, pc, (uptr)m); 998 } 999 return res; 1000} 1001 1002TSAN_INTERCEPTOR(int, pthread_rwlock_timedrdlock, void *m, void *abstime) { 1003 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_timedrdlock, m, abstime); 1004 int res = REAL(pthread_rwlock_timedrdlock)(m, abstime); 1005 if (res == 0) { 1006 MutexReadLock(thr, pc, (uptr)m); 1007 } 1008 return res; 1009} 1010 1011TSAN_INTERCEPTOR(int, pthread_rwlock_wrlock, void *m) { 1012 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_wrlock, m); 1013 int res = REAL(pthread_rwlock_wrlock)(m); 1014 if (res == 0) { 1015 MutexLock(thr, pc, (uptr)m); 1016 } 1017 return res; 1018} 1019 1020TSAN_INTERCEPTOR(int, pthread_rwlock_trywrlock, void *m) { 1021 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_trywrlock, m); 1022 int res = REAL(pthread_rwlock_trywrlock)(m); 1023 if (res == 0) { 1024 MutexLock(thr, pc, (uptr)m); 1025 } 1026 return res; 1027} 1028 1029TSAN_INTERCEPTOR(int, pthread_rwlock_timedwrlock, void *m, void *abstime) { 1030 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_timedwrlock, m, abstime); 1031 int res = REAL(pthread_rwlock_timedwrlock)(m, abstime); 1032 if (res == 0) { 1033 MutexLock(thr, pc, (uptr)m); 1034 } 1035 return res; 1036} 1037 1038TSAN_INTERCEPTOR(int, pthread_rwlock_unlock, void *m) { 1039 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_unlock, m); 1040 MutexReadOrWriteUnlock(thr, pc, (uptr)m); 1041 int res = REAL(pthread_rwlock_unlock)(m); 1042 return res; 1043} 1044 1045// libpthread.so contains several versions of pthread_cond_init symbol. 1046// When we just dlsym() it, we get the wrong (old) version. 1047/* 1048TSAN_INTERCEPTOR(int, pthread_cond_init, void *c, void *a) { 1049 SCOPED_TSAN_INTERCEPTOR(pthread_cond_init, c, a); 1050 int res = REAL(pthread_cond_init)(c, a); 1051 return res; 1052} 1053*/ 1054 1055TSAN_INTERCEPTOR(int, pthread_cond_destroy, void *c) { 1056 SCOPED_TSAN_INTERCEPTOR(pthread_cond_destroy, c); 1057 int res = REAL(pthread_cond_destroy)(c); 1058 return res; 1059} 1060 1061TSAN_INTERCEPTOR(int, pthread_cond_signal, void *c) { 1062 SCOPED_TSAN_INTERCEPTOR(pthread_cond_signal, c); 1063 int res = REAL(pthread_cond_signal)(c); 1064 return res; 1065} 1066 1067TSAN_INTERCEPTOR(int, pthread_cond_broadcast, void *c) { 1068 SCOPED_TSAN_INTERCEPTOR(pthread_cond_broadcast, c); 1069 int res = REAL(pthread_cond_broadcast)(c); 1070 return res; 1071} 1072 1073TSAN_INTERCEPTOR(int, pthread_cond_wait, void *c, void *m) { 1074 SCOPED_TSAN_INTERCEPTOR(pthread_cond_wait, c, m); 1075 MutexUnlock(thr, pc, (uptr)m); 1076 int res = REAL(pthread_cond_wait)(c, m); 1077 MutexLock(thr, pc, (uptr)m); 1078 return res; 1079} 1080 1081TSAN_INTERCEPTOR(int, pthread_cond_timedwait, void *c, void *m, void *abstime) { 1082 SCOPED_TSAN_INTERCEPTOR(pthread_cond_timedwait, c, m, abstime); 1083 MutexUnlock(thr, pc, (uptr)m); 1084 int res = REAL(pthread_cond_timedwait)(c, m, abstime); 1085 MutexLock(thr, pc, (uptr)m); 1086 return res; 1087} 1088 1089TSAN_INTERCEPTOR(int, pthread_barrier_init, void *b, void *a, unsigned count) { 1090 SCOPED_TSAN_INTERCEPTOR(pthread_barrier_init, b, a, count); 1091 MemoryWrite(thr, pc, (uptr)b, kSizeLog1); 1092 int res = REAL(pthread_barrier_init)(b, a, count); 1093 return res; 1094} 1095 1096TSAN_INTERCEPTOR(int, pthread_barrier_destroy, void *b) { 1097 SCOPED_TSAN_INTERCEPTOR(pthread_barrier_destroy, b); 1098 MemoryWrite(thr, pc, (uptr)b, kSizeLog1); 1099 int res = REAL(pthread_barrier_destroy)(b); 1100 return res; 1101} 1102 1103TSAN_INTERCEPTOR(int, pthread_barrier_wait, void *b) { 1104 SCOPED_TSAN_INTERCEPTOR(pthread_barrier_wait, b); 1105 Release(thr, pc, (uptr)b); 1106 MemoryRead(thr, pc, (uptr)b, kSizeLog1); 1107 int res = REAL(pthread_barrier_wait)(b); 1108 MemoryRead(thr, pc, (uptr)b, kSizeLog1); 1109 if (res == 0 || res == PTHREAD_BARRIER_SERIAL_THREAD) { 1110 Acquire(thr, pc, (uptr)b); 1111 } 1112 return res; 1113} 1114 1115TSAN_INTERCEPTOR(int, pthread_once, void *o, void (*f)()) { 1116 SCOPED_TSAN_INTERCEPTOR(pthread_once, o, f); 1117 if (o == 0 || f == 0) 1118 return EINVAL; 1119 atomic_uint32_t *a = static_cast<atomic_uint32_t*>(o); 1120 u32 v = atomic_load(a, memory_order_acquire); 1121 if (v == 0 && atomic_compare_exchange_strong(a, &v, 1, 1122 memory_order_relaxed)) { 1123 const int old_in_rtl = thr->in_rtl; 1124 thr->in_rtl = 0; 1125 (*f)(); 1126 CHECK_EQ(thr->in_rtl, 0); 1127 thr->in_rtl = old_in_rtl; 1128 Release(thr, pc, (uptr)o); 1129 atomic_store(a, 2, memory_order_release); 1130 } else { 1131 while (v != 2) { 1132 pthread_yield(); 1133 v = atomic_load(a, memory_order_acquire); 1134 } 1135 Acquire(thr, pc, (uptr)o); 1136 } 1137 return 0; 1138} 1139 1140TSAN_INTERCEPTOR(int, sem_init, void *s, int pshared, unsigned value) { 1141 SCOPED_TSAN_INTERCEPTOR(sem_init, s, pshared, value); 1142 int res = REAL(sem_init)(s, pshared, value); 1143 return res; 1144} 1145 1146TSAN_INTERCEPTOR(int, sem_destroy, void *s) { 1147 SCOPED_TSAN_INTERCEPTOR(sem_destroy, s); 1148 int res = REAL(sem_destroy)(s); 1149 return res; 1150} 1151 1152TSAN_INTERCEPTOR(int, sem_wait, void *s) { 1153 SCOPED_TSAN_INTERCEPTOR(sem_wait, s); 1154 int res = BLOCK_REAL(sem_wait)(s); 1155 if (res == 0) { 1156 Acquire(thr, pc, (uptr)s); 1157 } 1158 return res; 1159} 1160 1161TSAN_INTERCEPTOR(int, sem_trywait, void *s) { 1162 SCOPED_TSAN_INTERCEPTOR(sem_trywait, s); 1163 int res = BLOCK_REAL(sem_trywait)(s); 1164 if (res == 0) { 1165 Acquire(thr, pc, (uptr)s); 1166 } 1167 return res; 1168} 1169 1170TSAN_INTERCEPTOR(int, sem_timedwait, void *s, void *abstime) { 1171 SCOPED_TSAN_INTERCEPTOR(sem_timedwait, s, abstime); 1172 int res = BLOCK_REAL(sem_timedwait)(s, abstime); 1173 if (res == 0) { 1174 Acquire(thr, pc, (uptr)s); 1175 } 1176 return res; 1177} 1178 1179TSAN_INTERCEPTOR(int, sem_post, void *s) { 1180 SCOPED_TSAN_INTERCEPTOR(sem_post, s); 1181 Release(thr, pc, (uptr)s); 1182 int res = REAL(sem_post)(s); 1183 return res; 1184} 1185 1186TSAN_INTERCEPTOR(int, sem_getvalue, void *s, int *sval) { 1187 SCOPED_TSAN_INTERCEPTOR(sem_getvalue, s, sval); 1188 int res = REAL(sem_getvalue)(s, sval); 1189 if (res == 0) { 1190 Acquire(thr, pc, (uptr)s); 1191 } 1192 return res; 1193} 1194 1195TSAN_INTERCEPTOR(int, __xstat, int version, const char *path, void *buf) { 1196 SCOPED_TSAN_INTERCEPTOR(__xstat, version, path, buf); 1197 return REAL(__xstat)(version, path, buf); 1198} 1199 1200TSAN_INTERCEPTOR(int, stat, const char *path, void *buf) { 1201 SCOPED_TSAN_INTERCEPTOR(__xstat, 0, path, buf); 1202 return REAL(__xstat)(0, path, buf); 1203} 1204 1205TSAN_INTERCEPTOR(int, __xstat64, int version, const char *path, void *buf) { 1206 SCOPED_TSAN_INTERCEPTOR(__xstat64, version, path, buf); 1207 return REAL(__xstat64)(version, path, buf); 1208} 1209 1210TSAN_INTERCEPTOR(int, stat64, const char *path, void *buf) { 1211 SCOPED_TSAN_INTERCEPTOR(__xstat64, 0, path, buf); 1212 return REAL(__xstat64)(0, path, buf); 1213} 1214 1215TSAN_INTERCEPTOR(int, __lxstat, int version, const char *path, void *buf) { 1216 SCOPED_TSAN_INTERCEPTOR(__lxstat, version, path, buf); 1217 return REAL(__lxstat)(version, path, buf); 1218} 1219 1220TSAN_INTERCEPTOR(int, lstat, const char *path, void *buf) { 1221 SCOPED_TSAN_INTERCEPTOR(__lxstat, 0, path, buf); 1222 return REAL(__lxstat)(0, path, buf); 1223} 1224 1225TSAN_INTERCEPTOR(int, __lxstat64, int version, const char *path, void *buf) { 1226 SCOPED_TSAN_INTERCEPTOR(__lxstat64, version, path, buf); 1227 return REAL(__lxstat64)(version, path, buf); 1228} 1229 1230TSAN_INTERCEPTOR(int, lstat64, const char *path, void *buf) { 1231 SCOPED_TSAN_INTERCEPTOR(__lxstat64, 0, path, buf); 1232 return REAL(__lxstat64)(0, path, buf); 1233} 1234 1235TSAN_INTERCEPTOR(int, __fxstat, int version, int fd, void *buf) { 1236 SCOPED_TSAN_INTERCEPTOR(__fxstat, version, fd, buf); 1237 if (fd > 0) 1238 FdAccess(thr, pc, fd); 1239 return REAL(__fxstat)(version, fd, buf); 1240} 1241 1242TSAN_INTERCEPTOR(int, fstat, int fd, void *buf) { 1243 SCOPED_TSAN_INTERCEPTOR(__fxstat, 0, fd, buf); 1244 if (fd > 0) 1245 FdAccess(thr, pc, fd); 1246 return REAL(__fxstat)(0, fd, buf); 1247} 1248 1249TSAN_INTERCEPTOR(int, __fxstat64, int version, int fd, void *buf) { 1250 SCOPED_TSAN_INTERCEPTOR(__fxstat64, version, fd, buf); 1251 if (fd > 0) 1252 FdAccess(thr, pc, fd); 1253 return REAL(__fxstat64)(version, fd, buf); 1254} 1255 1256TSAN_INTERCEPTOR(int, fstat64, int fd, void *buf) { 1257 SCOPED_TSAN_INTERCEPTOR(__fxstat64, 0, fd, buf); 1258 if (fd > 0) 1259 FdAccess(thr, pc, fd); 1260 return REAL(__fxstat64)(0, fd, buf); 1261} 1262 1263TSAN_INTERCEPTOR(int, open, const char *name, int flags, int mode) { 1264 SCOPED_TSAN_INTERCEPTOR(open, name, flags, mode); 1265 int fd = REAL(open)(name, flags, mode); 1266 if (fd >= 0) 1267 FdFileCreate(thr, pc, fd); 1268 return fd; 1269} 1270 1271TSAN_INTERCEPTOR(int, open64, const char *name, int flags, int mode) { 1272 SCOPED_TSAN_INTERCEPTOR(open64, name, flags, mode); 1273 int fd = REAL(open64)(name, flags, mode); 1274 if (fd >= 0) 1275 FdFileCreate(thr, pc, fd); 1276 return fd; 1277} 1278 1279TSAN_INTERCEPTOR(int, creat, const char *name, int mode) { 1280 SCOPED_TSAN_INTERCEPTOR(creat, name, mode); 1281 int fd = REAL(creat)(name, mode); 1282 if (fd >= 0) 1283 FdFileCreate(thr, pc, fd); 1284 return fd; 1285} 1286 1287TSAN_INTERCEPTOR(int, creat64, const char *name, int mode) { 1288 SCOPED_TSAN_INTERCEPTOR(creat64, name, mode); 1289 int fd = REAL(creat64)(name, mode); 1290 if (fd >= 0) 1291 FdFileCreate(thr, pc, fd); 1292 return fd; 1293} 1294 1295TSAN_INTERCEPTOR(int, dup, int oldfd) { 1296 SCOPED_TSAN_INTERCEPTOR(dup, oldfd); 1297 int newfd = REAL(dup)(oldfd); 1298 if (oldfd >= 0 && newfd >= 0 && newfd != oldfd) 1299 FdDup(thr, pc, oldfd, newfd); 1300 return newfd; 1301} 1302 1303TSAN_INTERCEPTOR(int, dup2, int oldfd, int newfd) { 1304 SCOPED_TSAN_INTERCEPTOR(dup2, oldfd, newfd); 1305 int newfd2 = REAL(dup2)(oldfd, newfd); 1306 if (oldfd >= 0 && newfd2 >= 0 && newfd2 != oldfd) 1307 FdDup(thr, pc, oldfd, newfd2); 1308 return newfd2; 1309} 1310 1311TSAN_INTERCEPTOR(int, dup3, int oldfd, int newfd, int flags) { 1312 SCOPED_TSAN_INTERCEPTOR(dup3, oldfd, newfd, flags); 1313 int newfd2 = REAL(dup3)(oldfd, newfd, flags); 1314 if (oldfd >= 0 && newfd2 >= 0 && newfd2 != oldfd) 1315 FdDup(thr, pc, oldfd, newfd2); 1316 return newfd2; 1317} 1318 1319TSAN_INTERCEPTOR(int, eventfd, unsigned initval, int flags) { 1320 SCOPED_TSAN_INTERCEPTOR(eventfd, initval, flags); 1321 int fd = REAL(eventfd)(initval, flags); 1322 if (fd >= 0) 1323 FdEventCreate(thr, pc, fd); 1324 return fd; 1325} 1326 1327TSAN_INTERCEPTOR(int, signalfd, int fd, void *mask, int flags) { 1328 SCOPED_TSAN_INTERCEPTOR(signalfd, fd, mask, flags); 1329 if (fd >= 0) 1330 FdClose(thr, pc, fd); 1331 fd = REAL(signalfd)(fd, mask, flags); 1332 if (fd >= 0) 1333 FdSignalCreate(thr, pc, fd); 1334 return fd; 1335} 1336 1337TSAN_INTERCEPTOR(int, inotify_init, int fake) { 1338 SCOPED_TSAN_INTERCEPTOR(inotify_init, fake); 1339 int fd = REAL(inotify_init)(fake); 1340 if (fd >= 0) 1341 FdInotifyCreate(thr, pc, fd); 1342 return fd; 1343} 1344 1345TSAN_INTERCEPTOR(int, inotify_init1, int flags) { 1346 SCOPED_TSAN_INTERCEPTOR(inotify_init1, flags); 1347 int fd = REAL(inotify_init1)(flags); 1348 if (fd >= 0) 1349 FdInotifyCreate(thr, pc, fd); 1350 return fd; 1351} 1352 1353TSAN_INTERCEPTOR(int, socket, int domain, int type, int protocol) { 1354 SCOPED_TSAN_INTERCEPTOR(socket, domain, type, protocol); 1355 int fd = REAL(socket)(domain, type, protocol); 1356 if (fd >= 0) 1357 FdSocketCreate(thr, pc, fd); 1358 return fd; 1359} 1360 1361TSAN_INTERCEPTOR(int, socketpair, int domain, int type, int protocol, int *fd) { 1362 SCOPED_TSAN_INTERCEPTOR(socketpair, domain, type, protocol, fd); 1363 int res = REAL(socketpair)(domain, type, protocol, fd); 1364 if (res == 0 && fd[0] >= 0 && fd[1] >= 0) 1365 FdPipeCreate(thr, pc, fd[0], fd[1]); 1366 return res; 1367} 1368 1369TSAN_INTERCEPTOR(int, connect, int fd, void *addr, unsigned addrlen) { 1370 SCOPED_TSAN_INTERCEPTOR(connect, fd, addr, addrlen); 1371 FdSocketConnecting(thr, pc, fd); 1372 int res = REAL(connect)(fd, addr, addrlen); 1373 if (res == 0 && fd >= 0) 1374 FdSocketConnect(thr, pc, fd); 1375 return res; 1376} 1377 1378TSAN_INTERCEPTOR(int, bind, int fd, void *addr, unsigned addrlen) { 1379 SCOPED_TSAN_INTERCEPTOR(bind, fd, addr, addrlen); 1380 int res = REAL(bind)(fd, addr, addrlen); 1381 if (fd > 0 && res == 0) 1382 FdAccess(thr, pc, fd); 1383 return res; 1384} 1385 1386TSAN_INTERCEPTOR(int, listen, int fd, int backlog) { 1387 SCOPED_TSAN_INTERCEPTOR(listen, fd, backlog); 1388 int res = REAL(listen)(fd, backlog); 1389 if (fd > 0 && res == 0) 1390 FdAccess(thr, pc, fd); 1391 return res; 1392} 1393 1394TSAN_INTERCEPTOR(int, epoll_create, int size) { 1395 SCOPED_TSAN_INTERCEPTOR(epoll_create, size); 1396 int fd = REAL(epoll_create)(size); 1397 if (fd >= 0) 1398 FdPollCreate(thr, pc, fd); 1399 return fd; 1400} 1401 1402TSAN_INTERCEPTOR(int, epoll_create1, int flags) { 1403 SCOPED_TSAN_INTERCEPTOR(epoll_create1, flags); 1404 int fd = REAL(epoll_create1)(flags); 1405 if (fd >= 0) 1406 FdPollCreate(thr, pc, fd); 1407 return fd; 1408} 1409 1410TSAN_INTERCEPTOR(int, close, int fd) { 1411 SCOPED_TSAN_INTERCEPTOR(close, fd); 1412 if (fd >= 0) 1413 FdClose(thr, pc, fd); 1414 return REAL(close)(fd); 1415} 1416 1417TSAN_INTERCEPTOR(int, __close, int fd) { 1418 SCOPED_TSAN_INTERCEPTOR(__close, fd); 1419 if (fd >= 0) 1420 FdClose(thr, pc, fd); 1421 return REAL(__close)(fd); 1422} 1423 1424// glibc guts 1425TSAN_INTERCEPTOR(void, __res_iclose, void *state, bool free_addr) { 1426 SCOPED_TSAN_INTERCEPTOR(__res_iclose, state, free_addr); 1427 int fds[64]; 1428 int cnt = ExtractResolvFDs(state, fds, ARRAY_SIZE(fds)); 1429 for (int i = 0; i < cnt; i++) { 1430 if (fds[i] > 0) 1431 FdClose(thr, pc, fds[i]); 1432 } 1433 REAL(__res_iclose)(state, free_addr); 1434} 1435 1436TSAN_INTERCEPTOR(int, pipe, int *pipefd) { 1437 SCOPED_TSAN_INTERCEPTOR(pipe, pipefd); 1438 int res = REAL(pipe)(pipefd); 1439 if (res == 0 && pipefd[0] >= 0 && pipefd[1] >= 0) 1440 FdPipeCreate(thr, pc, pipefd[0], pipefd[1]); 1441 return res; 1442} 1443 1444TSAN_INTERCEPTOR(int, pipe2, int *pipefd, int flags) { 1445 SCOPED_TSAN_INTERCEPTOR(pipe2, pipefd, flags); 1446 int res = REAL(pipe2)(pipefd, flags); 1447 if (res == 0 && pipefd[0] >= 0 && pipefd[1] >= 0) 1448 FdPipeCreate(thr, pc, pipefd[0], pipefd[1]); 1449 return res; 1450} 1451 1452TSAN_INTERCEPTOR(long_t, readv, int fd, void *vec, int cnt) { 1453 SCOPED_TSAN_INTERCEPTOR(readv, fd, vec, cnt); 1454 int res = REAL(readv)(fd, vec, cnt); 1455 if (res >= 0 && fd >= 0) { 1456 FdAcquire(thr, pc, fd); 1457 } 1458 return res; 1459} 1460 1461TSAN_INTERCEPTOR(long_t, preadv64, int fd, void *vec, int cnt, u64 off) { 1462 SCOPED_TSAN_INTERCEPTOR(preadv64, fd, vec, cnt, off); 1463 int res = REAL(preadv64)(fd, vec, cnt, off); 1464 if (res >= 0 && fd >= 0) { 1465 FdAcquire(thr, pc, fd); 1466 } 1467 return res; 1468} 1469 1470TSAN_INTERCEPTOR(long_t, writev, int fd, void *vec, int cnt) { 1471 SCOPED_TSAN_INTERCEPTOR(writev, fd, vec, cnt); 1472 if (fd >= 0) 1473 FdRelease(thr, pc, fd); 1474 int res = REAL(writev)(fd, vec, cnt); 1475 return res; 1476} 1477 1478TSAN_INTERCEPTOR(long_t, pwritev64, int fd, void *vec, int cnt, u64 off) { 1479 SCOPED_TSAN_INTERCEPTOR(pwritev64, fd, vec, cnt, off); 1480 if (fd >= 0) 1481 FdRelease(thr, pc, fd); 1482 int res = REAL(pwritev64)(fd, vec, cnt, off); 1483 return res; 1484} 1485 1486TSAN_INTERCEPTOR(long_t, send, int fd, void *buf, long_t len, int flags) { 1487 SCOPED_TSAN_INTERCEPTOR(send, fd, buf, len, flags); 1488 if (fd >= 0) 1489 FdRelease(thr, pc, fd); 1490 int res = REAL(send)(fd, buf, len, flags); 1491 return res; 1492} 1493 1494TSAN_INTERCEPTOR(long_t, sendmsg, int fd, void *msg, int flags) { 1495 SCOPED_TSAN_INTERCEPTOR(sendmsg, fd, msg, flags); 1496 if (fd >= 0) 1497 FdRelease(thr, pc, fd); 1498 int res = REAL(sendmsg)(fd, msg, flags); 1499 return res; 1500} 1501 1502TSAN_INTERCEPTOR(long_t, recv, int fd, void *buf, long_t len, int flags) { 1503 SCOPED_TSAN_INTERCEPTOR(recv, fd, buf, len, flags); 1504 int res = REAL(recv)(fd, buf, len, flags); 1505 if (res >= 0 && fd >= 0) { 1506 FdAcquire(thr, pc, fd); 1507 } 1508 return res; 1509} 1510 1511TSAN_INTERCEPTOR(int, unlink, char *path) { 1512 SCOPED_TSAN_INTERCEPTOR(unlink, path); 1513 Release(thr, pc, File2addr(path)); 1514 int res = REAL(unlink)(path); 1515 return res; 1516} 1517 1518TSAN_INTERCEPTOR(void*, fopen, char *path, char *mode) { 1519 SCOPED_TSAN_INTERCEPTOR(fopen, path, mode); 1520 void *res = REAL(fopen)(path, mode); 1521 Acquire(thr, pc, File2addr(path)); 1522 if (res) { 1523 int fd = fileno_unlocked(res); 1524 if (fd >= 0) 1525 FdFileCreate(thr, pc, fd); 1526 } 1527 return res; 1528} 1529 1530TSAN_INTERCEPTOR(void*, freopen, char *path, char *mode, void *stream) { 1531 SCOPED_TSAN_INTERCEPTOR(freopen, path, mode, stream); 1532 if (stream) { 1533 int fd = fileno_unlocked(stream); 1534 if (fd >= 0) 1535 FdClose(thr, pc, fd); 1536 } 1537 void *res = REAL(freopen)(path, mode, stream); 1538 Acquire(thr, pc, File2addr(path)); 1539 if (res) { 1540 int fd = fileno_unlocked(res); 1541 if (fd >= 0) 1542 FdFileCreate(thr, pc, fd); 1543 } 1544 return res; 1545} 1546 1547TSAN_INTERCEPTOR(int, fclose, void *stream) { 1548 { 1549 SCOPED_TSAN_INTERCEPTOR(fclose, stream); 1550 if (stream) { 1551 int fd = fileno_unlocked(stream); 1552 if (fd >= 0) 1553 FdClose(thr, pc, fd); 1554 } 1555 } 1556 return REAL(fclose)(stream); 1557} 1558 1559TSAN_INTERCEPTOR(uptr, fread, void *ptr, uptr size, uptr nmemb, void *f) { 1560 { 1561 SCOPED_TSAN_INTERCEPTOR(fread, ptr, size, nmemb, f); 1562 MemoryAccessRange(thr, pc, (uptr)ptr, size * nmemb, true); 1563 } 1564 return REAL(fread)(ptr, size, nmemb, f); 1565} 1566 1567TSAN_INTERCEPTOR(uptr, fwrite, const void *p, uptr size, uptr nmemb, void *f) { 1568 { 1569 SCOPED_TSAN_INTERCEPTOR(fwrite, p, size, nmemb, f); 1570 MemoryAccessRange(thr, pc, (uptr)p, size * nmemb, false); 1571 } 1572 return REAL(fwrite)(p, size, nmemb, f); 1573} 1574 1575TSAN_INTERCEPTOR(int, fflush, void *stream) { 1576 SCOPED_TSAN_INTERCEPTOR(fflush, stream); 1577 return REAL(fflush)(stream); 1578} 1579 1580TSAN_INTERCEPTOR(void, abort, int fake) { 1581 SCOPED_TSAN_INTERCEPTOR(abort, fake); 1582 REAL(fflush)(0); 1583 REAL(abort)(fake); 1584} 1585 1586TSAN_INTERCEPTOR(int, puts, const char *s) { 1587 SCOPED_TSAN_INTERCEPTOR(puts, s); 1588 MemoryAccessRange(thr, pc, (uptr)s, internal_strlen(s), false); 1589 return REAL(puts)(s); 1590} 1591 1592TSAN_INTERCEPTOR(int, rmdir, char *path) { 1593 SCOPED_TSAN_INTERCEPTOR(rmdir, path); 1594 Release(thr, pc, Dir2addr(path)); 1595 int res = REAL(rmdir)(path); 1596 return res; 1597} 1598 1599TSAN_INTERCEPTOR(void*, opendir, char *path) { 1600 SCOPED_TSAN_INTERCEPTOR(opendir, path); 1601 void *res = REAL(opendir)(path); 1602 if (res != 0) 1603 Acquire(thr, pc, Dir2addr(path)); 1604 return res; 1605} 1606 1607TSAN_INTERCEPTOR(int, epoll_ctl, int epfd, int op, int fd, void *ev) { 1608 SCOPED_TSAN_INTERCEPTOR(epoll_ctl, epfd, op, fd, ev); 1609 if (op == EPOLL_CTL_ADD && epfd >= 0) { 1610 FdRelease(thr, pc, epfd); 1611 } 1612 int res = REAL(epoll_ctl)(epfd, op, fd, ev); 1613 if (fd >= 0) 1614 FdAccess(thr, pc, fd); 1615 return res; 1616} 1617 1618TSAN_INTERCEPTOR(int, epoll_wait, int epfd, void *ev, int cnt, int timeout) { 1619 SCOPED_TSAN_INTERCEPTOR(epoll_wait, epfd, ev, cnt, timeout); 1620 int res = BLOCK_REAL(epoll_wait)(epfd, ev, cnt, timeout); 1621 if (res > 0 && epfd >= 0) { 1622 FdAcquire(thr, pc, epfd); 1623 } 1624 return res; 1625} 1626 1627TSAN_INTERCEPTOR(int, poll, void *fds, long_t nfds, int timeout) { 1628 SCOPED_TSAN_INTERCEPTOR(poll, fds, nfds, timeout); 1629 int res = BLOCK_REAL(poll)(fds, nfds, timeout); 1630 return res; 1631} 1632 1633void ALWAYS_INLINE rtl_generic_sighandler(bool sigact, int sig, 1634 my_siginfo_t *info, void *ctx) { 1635 ThreadState *thr = cur_thread(); 1636 SignalContext *sctx = SigCtx(thr); 1637 // Don't mess with synchronous signals. 1638 if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL || 1639 sig == SIGABRT || sig == SIGFPE || sig == SIGPIPE || 1640 // If we are sending signal to ourselves, we must process it now. 1641 (sctx && sig == sctx->int_signal_send) || 1642 // If we are in blocking function, we can safely process it now 1643 // (but check if we are in a recursive interceptor, 1644 // i.e. pthread_join()->munmap()). 1645 (sctx && sctx->in_blocking_func == 1 && thr->in_rtl == 1)) { 1646 int in_rtl = thr->in_rtl; 1647 thr->in_rtl = 0; 1648 CHECK_EQ(thr->in_signal_handler, false); 1649 thr->in_signal_handler = true; 1650 if (sigact) 1651 sigactions[sig].sa_sigaction(sig, info, ctx); 1652 else 1653 sigactions[sig].sa_handler(sig); 1654 CHECK_EQ(thr->in_signal_handler, true); 1655 thr->in_signal_handler = false; 1656 thr->in_rtl = in_rtl; 1657 return; 1658 } 1659 1660 if (sctx == 0) 1661 return; 1662 SignalDesc *signal = &sctx->pending_signals[sig]; 1663 if (signal->armed == false) { 1664 signal->armed = true; 1665 signal->sigaction = sigact; 1666 if (info) 1667 internal_memcpy(&signal->siginfo, info, sizeof(*info)); 1668 if (ctx) 1669 internal_memcpy(&signal->ctx, ctx, sizeof(signal->ctx)); 1670 sctx->pending_signal_count++; 1671 } 1672} 1673 1674static void rtl_sighandler(int sig) { 1675 rtl_generic_sighandler(false, sig, 0, 0); 1676} 1677 1678static void rtl_sigaction(int sig, my_siginfo_t *info, void *ctx) { 1679 rtl_generic_sighandler(true, sig, info, ctx); 1680} 1681 1682TSAN_INTERCEPTOR(int, sigaction, int sig, sigaction_t *act, sigaction_t *old) { 1683 SCOPED_TSAN_INTERCEPTOR(sigaction, sig, act, old); 1684 if (old) 1685 internal_memcpy(old, &sigactions[sig], sizeof(*old)); 1686 if (act == 0) 1687 return 0; 1688 internal_memcpy(&sigactions[sig], act, sizeof(*act)); 1689 sigaction_t newact; 1690 internal_memcpy(&newact, act, sizeof(newact)); 1691 sigfillset(&newact.sa_mask); 1692 if (act->sa_handler != SIG_IGN && act->sa_handler != SIG_DFL) { 1693 if (newact.sa_flags & SA_SIGINFO) 1694 newact.sa_sigaction = rtl_sigaction; 1695 else 1696 newact.sa_handler = rtl_sighandler; 1697 } 1698 int res = REAL(sigaction)(sig, &newact, 0); 1699 return res; 1700} 1701 1702TSAN_INTERCEPTOR(sighandler_t, signal, int sig, sighandler_t h) { 1703 sigaction_t act; 1704 act.sa_handler = h; 1705 REAL(memset)(&act.sa_mask, -1, sizeof(act.sa_mask)); 1706 act.sa_flags = 0; 1707 sigaction_t old; 1708 int res = sigaction(sig, &act, &old); 1709 if (res) 1710 return SIG_ERR; 1711 return old.sa_handler; 1712} 1713 1714TSAN_INTERCEPTOR(int, raise, int sig) { 1715 SCOPED_TSAN_INTERCEPTOR(raise, sig); 1716 SignalContext *sctx = SigCtx(thr); 1717 CHECK_NE(sctx, 0); 1718 int prev = sctx->int_signal_send; 1719 sctx->int_signal_send = sig; 1720 int res = REAL(raise)(sig); 1721 CHECK_EQ(sctx->int_signal_send, sig); 1722 sctx->int_signal_send = prev; 1723 return res; 1724} 1725 1726TSAN_INTERCEPTOR(int, kill, int pid, int sig) { 1727 SCOPED_TSAN_INTERCEPTOR(kill, pid, sig); 1728 SignalContext *sctx = SigCtx(thr); 1729 CHECK_NE(sctx, 0); 1730 int prev = sctx->int_signal_send; 1731 if (pid == (int)internal_getpid()) { 1732 sctx->int_signal_send = sig; 1733 } 1734 int res = REAL(kill)(pid, sig); 1735 if (pid == (int)internal_getpid()) { 1736 CHECK_EQ(sctx->int_signal_send, sig); 1737 sctx->int_signal_send = prev; 1738 } 1739 return res; 1740} 1741 1742TSAN_INTERCEPTOR(int, pthread_kill, void *tid, int sig) { 1743 SCOPED_TSAN_INTERCEPTOR(pthread_kill, tid, sig); 1744 SignalContext *sctx = SigCtx(thr); 1745 CHECK_NE(sctx, 0); 1746 int prev = sctx->int_signal_send; 1747 if (tid == pthread_self()) { 1748 sctx->int_signal_send = sig; 1749 } 1750 int res = REAL(pthread_kill)(tid, sig); 1751 if (tid == pthread_self()) { 1752 CHECK_EQ(sctx->int_signal_send, sig); 1753 sctx->int_signal_send = prev; 1754 } 1755 return res; 1756} 1757 1758TSAN_INTERCEPTOR(int, gettimeofday, void *tv, void *tz) { 1759 SCOPED_TSAN_INTERCEPTOR(gettimeofday, tv, tz); 1760 // It's intercepted merely to process pending signals. 1761 return REAL(gettimeofday)(tv, tz); 1762} 1763 1764// Linux kernel has a bug that leads to kernel deadlock if a process 1765// maps TBs of memory and then calls mlock(). 1766static void MlockIsUnsupported() { 1767 static atomic_uint8_t printed; 1768 if (atomic_exchange(&printed, 1, memory_order_relaxed)) 1769 return; 1770 Printf("INFO: ThreadSanitizer ignores mlock/mlockall/munlock/munlockall\n"); 1771} 1772 1773TSAN_INTERCEPTOR(int, mlock, const void *addr, uptr len) { 1774 MlockIsUnsupported(); 1775 return 0; 1776} 1777 1778TSAN_INTERCEPTOR(int, munlock, const void *addr, uptr len) { 1779 MlockIsUnsupported(); 1780 return 0; 1781} 1782 1783TSAN_INTERCEPTOR(int, mlockall, int flags) { 1784 MlockIsUnsupported(); 1785 return 0; 1786} 1787 1788TSAN_INTERCEPTOR(int, munlockall, void) { 1789 MlockIsUnsupported(); 1790 return 0; 1791} 1792 1793TSAN_INTERCEPTOR(int, fork, int fake) { 1794 SCOPED_TSAN_INTERCEPTOR(fork, fake); 1795 // It's intercepted merely to process pending signals. 1796 int pid = REAL(fork)(fake); 1797 if (pid == 0) { 1798 // child 1799 FdOnFork(thr, pc); 1800 } else if (pid > 0) { 1801 // parent 1802 } 1803 return pid; 1804} 1805 1806struct TsanInterceptorContext { 1807 ThreadState *thr; 1808 const uptr caller_pc; 1809 const uptr pc; 1810}; 1811 1812#include "sanitizer_common/sanitizer_platform_interceptors.h" 1813// Causes interceptor recursion (getpwuid_r() calls fopen()) 1814#undef SANITIZER_INTERCEPT_GETPWNAM_AND_FRIENDS 1815#undef SANITIZER_INTERCEPT_GETPWNAM_R_AND_FRIENDS 1816// Causes interceptor recursion (getaddrinfo() and fopen()) 1817#undef SANITIZER_INTERCEPT_GETADDRINFO 1818// Causes interceptor recursion (glob64() calls lstat64()) 1819#undef SANITIZER_INTERCEPT_GLOB 1820 1821#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \ 1822 MemoryAccessRange(((TsanInterceptorContext *) ctx)->thr, \ 1823 ((TsanInterceptorContext *) ctx)->pc, (uptr) ptr, size, \ 1824 true) 1825#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) \ 1826 MemoryAccessRange(((TsanInterceptorContext *) ctx)->thr, \ 1827 ((TsanInterceptorContext *) ctx)->pc, (uptr) ptr, size, \ 1828 false) 1829#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \ 1830 SCOPED_TSAN_INTERCEPTOR(func, __VA_ARGS__); \ 1831 TsanInterceptorContext _ctx = {thr, caller_pc, pc}; \ 1832 ctx = (void *)&_ctx; \ 1833 (void) ctx; 1834#define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \ 1835 FdAcquire(((TsanInterceptorContext *) ctx)->thr, pc, fd) 1836#define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) \ 1837 FdRelease(((TsanInterceptorContext *) ctx)->thr, pc, fd) 1838#define COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, newfd) \ 1839 FdSocketAccept(((TsanInterceptorContext *) ctx)->thr, pc, fd, newfd) 1840#define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) \ 1841 ThreadSetName(((TsanInterceptorContext *) ctx)->thr, name) 1842#include "sanitizer_common/sanitizer_common_interceptors.inc" 1843 1844// FIXME: Implement these with MemoryAccessRange(). 1845#define COMMON_SYSCALL_PRE_READ_RANGE(p, s) 1846#define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s) 1847#define COMMON_SYSCALL_POST_READ_RANGE(p, s) 1848#define COMMON_SYSCALL_POST_WRITE_RANGE(p, s) 1849#include "sanitizer_common/sanitizer_common_syscalls.inc" 1850 1851namespace __tsan { 1852 1853void ProcessPendingSignals(ThreadState *thr) { 1854 CHECK_EQ(thr->in_rtl, 0); 1855 SignalContext *sctx = SigCtx(thr); 1856 if (sctx == 0 || sctx->pending_signal_count == 0 || thr->in_signal_handler) 1857 return; 1858 Context *ctx = CTX(); 1859 thr->in_signal_handler = true; 1860 sctx->pending_signal_count = 0; 1861 // These are too big for stack. 1862 static THREADLOCAL sigset_t emptyset, oldset; 1863 sigfillset(&emptyset); 1864 pthread_sigmask(SIG_SETMASK, &emptyset, &oldset); 1865 for (int sig = 0; sig < kSigCount; sig++) { 1866 SignalDesc *signal = &sctx->pending_signals[sig]; 1867 if (signal->armed) { 1868 signal->armed = false; 1869 if (sigactions[sig].sa_handler != SIG_DFL 1870 && sigactions[sig].sa_handler != SIG_IGN) { 1871 // Insure that the handler does not spoil errno. 1872 const int saved_errno = errno; 1873 errno = 0; 1874 if (signal->sigaction) 1875 sigactions[sig].sa_sigaction(sig, &signal->siginfo, &signal->ctx); 1876 else 1877 sigactions[sig].sa_handler(sig); 1878 if (flags()->report_bugs && errno != 0) { 1879 ScopedInRtl in_rtl; 1880 __tsan::StackTrace stack; 1881 uptr pc = signal->sigaction ? 1882 (uptr)sigactions[sig].sa_sigaction : 1883 (uptr)sigactions[sig].sa_handler; 1884 pc += 1; // return address is expected, OutputReport() will undo this 1885 stack.Init(&pc, 1); 1886 ThreadRegistryLock l(ctx->thread_registry); 1887 ScopedReport rep(ReportTypeErrnoInSignal); 1888 if (!IsFiredSuppression(ctx, rep, stack)) { 1889 rep.AddStack(&stack); 1890 OutputReport(ctx, rep, rep.GetReport()->stacks[0]); 1891 } 1892 } 1893 errno = saved_errno; 1894 } 1895 } 1896 } 1897 pthread_sigmask(SIG_SETMASK, &oldset, 0); 1898 CHECK_EQ(thr->in_signal_handler, true); 1899 thr->in_signal_handler = false; 1900} 1901 1902static void finalize(void *arg) { 1903 ThreadState * thr = cur_thread(); 1904 uptr pc = 0; 1905 atexit_ctx->exit(thr, pc); 1906 int status = Finalize(cur_thread()); 1907 REAL(fflush)(0); 1908 if (status) 1909 _exit(status); 1910} 1911 1912static void unreachable() { 1913 Printf("FATAL: ThreadSanitizer: unreachable called\n"); 1914 Die(); 1915} 1916 1917void InitializeInterceptors() { 1918 CHECK_GT(cur_thread()->in_rtl, 0); 1919 1920 // We need to setup it early, because functions like dlsym() can call it. 1921 REAL(memset) = internal_memset; 1922 REAL(memcpy) = internal_memcpy; 1923 REAL(memcmp) = internal_memcmp; 1924 1925 // Instruct libc malloc to consume less memory. 1926 mallopt(1, 0); // M_MXFAST 1927 mallopt(-3, 32*1024); // M_MMAP_THRESHOLD 1928 1929 SANITIZER_COMMON_INTERCEPTORS_INIT; 1930 1931 TSAN_INTERCEPT(setjmp); 1932 TSAN_INTERCEPT(_setjmp); 1933 TSAN_INTERCEPT(sigsetjmp); 1934 TSAN_INTERCEPT(__sigsetjmp); 1935 TSAN_INTERCEPT(longjmp); 1936 TSAN_INTERCEPT(siglongjmp); 1937 1938 TSAN_INTERCEPT(malloc); 1939 TSAN_INTERCEPT(__libc_memalign); 1940 TSAN_INTERCEPT(calloc); 1941 TSAN_INTERCEPT(realloc); 1942 TSAN_INTERCEPT(free); 1943 TSAN_INTERCEPT(cfree); 1944 TSAN_INTERCEPT(mmap); 1945 TSAN_INTERCEPT(mmap64); 1946 TSAN_INTERCEPT(munmap); 1947 TSAN_INTERCEPT(memalign); 1948 TSAN_INTERCEPT(valloc); 1949 TSAN_INTERCEPT(pvalloc); 1950 TSAN_INTERCEPT(posix_memalign); 1951 1952 TSAN_INTERCEPT(strlen); 1953 TSAN_INTERCEPT(memset); 1954 TSAN_INTERCEPT(memcpy); 1955 TSAN_INTERCEPT(strcmp); 1956 TSAN_INTERCEPT(memchr); 1957 TSAN_INTERCEPT(memrchr); 1958 TSAN_INTERCEPT(memmove); 1959 TSAN_INTERCEPT(memcmp); 1960 TSAN_INTERCEPT(strchr); 1961 TSAN_INTERCEPT(strchrnul); 1962 TSAN_INTERCEPT(strrchr); 1963 TSAN_INTERCEPT(strncmp); 1964 TSAN_INTERCEPT(strcpy); // NOLINT 1965 TSAN_INTERCEPT(strncpy); 1966 TSAN_INTERCEPT(strstr); 1967 1968 TSAN_INTERCEPT(pthread_create); 1969 TSAN_INTERCEPT(pthread_join); 1970 TSAN_INTERCEPT(pthread_detach); 1971 1972 TSAN_INTERCEPT(pthread_mutex_init); 1973 TSAN_INTERCEPT(pthread_mutex_destroy); 1974 TSAN_INTERCEPT(pthread_mutex_lock); 1975 TSAN_INTERCEPT(pthread_mutex_trylock); 1976 TSAN_INTERCEPT(pthread_mutex_timedlock); 1977 TSAN_INTERCEPT(pthread_mutex_unlock); 1978 1979 TSAN_INTERCEPT(pthread_spin_init); 1980 TSAN_INTERCEPT(pthread_spin_destroy); 1981 TSAN_INTERCEPT(pthread_spin_lock); 1982 TSAN_INTERCEPT(pthread_spin_trylock); 1983 TSAN_INTERCEPT(pthread_spin_unlock); 1984 1985 TSAN_INTERCEPT(pthread_rwlock_init); 1986 TSAN_INTERCEPT(pthread_rwlock_destroy); 1987 TSAN_INTERCEPT(pthread_rwlock_rdlock); 1988 TSAN_INTERCEPT(pthread_rwlock_tryrdlock); 1989 TSAN_INTERCEPT(pthread_rwlock_timedrdlock); 1990 TSAN_INTERCEPT(pthread_rwlock_wrlock); 1991 TSAN_INTERCEPT(pthread_rwlock_trywrlock); 1992 TSAN_INTERCEPT(pthread_rwlock_timedwrlock); 1993 TSAN_INTERCEPT(pthread_rwlock_unlock); 1994 1995 // TSAN_INTERCEPT(pthread_cond_init); 1996 TSAN_INTERCEPT(pthread_cond_destroy); 1997 TSAN_INTERCEPT(pthread_cond_signal); 1998 TSAN_INTERCEPT(pthread_cond_broadcast); 1999 TSAN_INTERCEPT(pthread_cond_wait); 2000 TSAN_INTERCEPT(pthread_cond_timedwait); 2001 2002 TSAN_INTERCEPT(pthread_barrier_init); 2003 TSAN_INTERCEPT(pthread_barrier_destroy); 2004 TSAN_INTERCEPT(pthread_barrier_wait); 2005 2006 TSAN_INTERCEPT(pthread_once); 2007 2008 TSAN_INTERCEPT(sem_init); 2009 TSAN_INTERCEPT(sem_destroy); 2010 TSAN_INTERCEPT(sem_wait); 2011 TSAN_INTERCEPT(sem_trywait); 2012 TSAN_INTERCEPT(sem_timedwait); 2013 TSAN_INTERCEPT(sem_post); 2014 TSAN_INTERCEPT(sem_getvalue); 2015 2016 TSAN_INTERCEPT(stat); 2017 TSAN_INTERCEPT(__xstat); 2018 TSAN_INTERCEPT(stat64); 2019 TSAN_INTERCEPT(__xstat64); 2020 TSAN_INTERCEPT(lstat); 2021 TSAN_INTERCEPT(__lxstat); 2022 TSAN_INTERCEPT(lstat64); 2023 TSAN_INTERCEPT(__lxstat64); 2024 TSAN_INTERCEPT(fstat); 2025 TSAN_INTERCEPT(__fxstat); 2026 TSAN_INTERCEPT(fstat64); 2027 TSAN_INTERCEPT(__fxstat64); 2028 TSAN_INTERCEPT(open); 2029 TSAN_INTERCEPT(open64); 2030 TSAN_INTERCEPT(creat); 2031 TSAN_INTERCEPT(creat64); 2032 TSAN_INTERCEPT(dup); 2033 TSAN_INTERCEPT(dup2); 2034 TSAN_INTERCEPT(dup3); 2035 TSAN_INTERCEPT(eventfd); 2036 TSAN_INTERCEPT(signalfd); 2037 TSAN_INTERCEPT(inotify_init); 2038 TSAN_INTERCEPT(inotify_init1); 2039 TSAN_INTERCEPT(socket); 2040 TSAN_INTERCEPT(socketpair); 2041 TSAN_INTERCEPT(connect); 2042 TSAN_INTERCEPT(bind); 2043 TSAN_INTERCEPT(listen); 2044 TSAN_INTERCEPT(epoll_create); 2045 TSAN_INTERCEPT(epoll_create1); 2046 TSAN_INTERCEPT(close); 2047 TSAN_INTERCEPT(__close); 2048 TSAN_INTERCEPT(__res_iclose); 2049 TSAN_INTERCEPT(pipe); 2050 TSAN_INTERCEPT(pipe2); 2051 2052 TSAN_INTERCEPT(readv); 2053 TSAN_INTERCEPT(preadv64); 2054 TSAN_INTERCEPT(writev); 2055 TSAN_INTERCEPT(pwritev64); 2056 TSAN_INTERCEPT(send); 2057 TSAN_INTERCEPT(sendmsg); 2058 TSAN_INTERCEPT(recv); 2059 2060 TSAN_INTERCEPT(unlink); 2061 TSAN_INTERCEPT(fopen); 2062 TSAN_INTERCEPT(freopen); 2063 TSAN_INTERCEPT(fclose); 2064 TSAN_INTERCEPT(fread); 2065 TSAN_INTERCEPT(fwrite); 2066 TSAN_INTERCEPT(fflush); 2067 TSAN_INTERCEPT(abort); 2068 TSAN_INTERCEPT(puts); 2069 TSAN_INTERCEPT(rmdir); 2070 TSAN_INTERCEPT(opendir); 2071 2072 TSAN_INTERCEPT(epoll_ctl); 2073 TSAN_INTERCEPT(epoll_wait); 2074 TSAN_INTERCEPT(poll); 2075 2076 TSAN_INTERCEPT(sigaction); 2077 TSAN_INTERCEPT(signal); 2078 TSAN_INTERCEPT(raise); 2079 TSAN_INTERCEPT(kill); 2080 TSAN_INTERCEPT(pthread_kill); 2081 TSAN_INTERCEPT(sleep); 2082 TSAN_INTERCEPT(usleep); 2083 TSAN_INTERCEPT(nanosleep); 2084 TSAN_INTERCEPT(gettimeofday); 2085 2086 TSAN_INTERCEPT(mlock); 2087 TSAN_INTERCEPT(munlock); 2088 TSAN_INTERCEPT(mlockall); 2089 TSAN_INTERCEPT(munlockall); 2090 2091 TSAN_INTERCEPT(fork); 2092 TSAN_INTERCEPT(on_exit); 2093 TSAN_INTERCEPT(__cxa_atexit); 2094 2095 // Need to setup it, because interceptors check that the function is resolved. 2096 // But atexit is emitted directly into the module, so can't be resolved. 2097 REAL(atexit) = (int(*)(void(*)()))unreachable; 2098 atexit_ctx = new(internal_alloc(MBlockAtExit, sizeof(AtExitContext))) 2099 AtExitContext(); 2100 2101 if (REAL(__cxa_atexit)(&finalize, 0, 0)) { 2102 Printf("ThreadSanitizer: failed to setup atexit callback\n"); 2103 Die(); 2104 } 2105 2106 if (pthread_key_create(&g_thread_finalize_key, &thread_finalize)) { 2107 Printf("ThreadSanitizer: failed to create thread key\n"); 2108 Die(); 2109 } 2110 2111 FdInit(); 2112} 2113 2114void internal_start_thread(void(*func)(void *arg), void *arg) { 2115 void *th; 2116 REAL(pthread_create)(&th, 0, (void*(*)(void *arg))func, arg); 2117 REAL(pthread_detach)(th); 2118} 2119 2120} // namespace __tsan 2121