tsan_interceptors.cc revision 5cf2c460e96e593b1c772f1b02d3a217f4837fdc
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_suppressions.h" 26#include "tsan_rtl.h" 27#include "tsan_mman.h" 28#include "tsan_fd.h" 29 30using namespace __tsan; // NOLINT 31 32const int kSigCount = 64; 33 34struct my_siginfo_t { 35 // The size is determined by looking at sizeof of real siginfo_t on linux. 36 u64 opaque[128 / sizeof(u64)]; 37}; 38 39struct ucontext_t { 40 // The size is determined by looking at sizeof of real ucontext_t on linux. 41 u64 opaque[936 / sizeof(u64) + 1]; 42}; 43 44extern "C" int pthread_attr_init(void *attr); 45extern "C" int pthread_attr_destroy(void *attr); 46DECLARE_REAL(int, pthread_attr_getdetachstate, void *, void *) 47extern "C" int pthread_attr_setstacksize(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 __sanitizer_sigset_t *set, 53 __sanitizer_sigset_t *oldset); 54// REAL(sigfillset) defined in common interceptors. 55DECLARE_REAL(int, sigfillset, __sanitizer_sigset_t *set) 56extern "C" void *pthread_self(); 57extern "C" void _exit(int status); 58extern "C" int *__errno_location(); 59extern "C" int fileno_unlocked(void *stream); 60extern "C" void *__libc_malloc(uptr size); 61extern "C" void *__libc_calloc(uptr size, uptr n); 62extern "C" void *__libc_realloc(void *ptr, uptr size); 63extern "C" void __libc_free(void *ptr); 64extern "C" int mallopt(int param, int value); 65const int PTHREAD_MUTEX_RECURSIVE = 1; 66const int PTHREAD_MUTEX_RECURSIVE_NP = 1; 67const int EINVAL = 22; 68const int EBUSY = 16; 69const int EPOLL_CTL_ADD = 1; 70const int SIGILL = 4; 71const int SIGABRT = 6; 72const int SIGFPE = 8; 73const int SIGSEGV = 11; 74const int SIGPIPE = 13; 75const int SIGBUS = 7; 76const int SIGSYS = 31; 77void *const MAP_FAILED = (void*)-1; 78const int PTHREAD_BARRIER_SERIAL_THREAD = -1; 79const int MAP_FIXED = 0x10; 80typedef long long_t; // NOLINT 81 82// From /usr/include/unistd.h 83# define F_ULOCK 0 /* Unlock a previously locked region. */ 84# define F_LOCK 1 /* Lock a region for exclusive use. */ 85# define F_TLOCK 2 /* Test and lock a region for exclusive use. */ 86# define F_TEST 3 /* Test a region for other processes locks. */ 87 88typedef void (*sighandler_t)(int sig); 89 90#define errno (*__errno_location()) 91 92struct sigaction_t { 93 union { 94 sighandler_t sa_handler; 95 void (*sa_sigaction)(int sig, my_siginfo_t *siginfo, void *uctx); 96 }; 97 __sanitizer_sigset_t sa_mask; 98 int sa_flags; 99 void (*sa_restorer)(); 100}; 101 102const sighandler_t SIG_DFL = (sighandler_t)0; 103const sighandler_t SIG_IGN = (sighandler_t)1; 104const sighandler_t SIG_ERR = (sighandler_t)-1; 105const int SA_SIGINFO = 4; 106const int SIG_SETMASK = 2; 107 108namespace std { 109struct nothrow_t {}; 110} // namespace std 111 112static sigaction_t sigactions[kSigCount]; 113 114namespace __tsan { 115struct SignalDesc { 116 bool armed; 117 bool sigaction; 118 my_siginfo_t siginfo; 119 ucontext_t ctx; 120}; 121 122struct SignalContext { 123 int in_blocking_func; 124 int int_signal_send; 125 int pending_signal_count; 126 SignalDesc pending_signals[kSigCount]; 127}; 128 129// The object is 64-byte aligned, because we want hot data to be located in 130// a single cache line if possible (it's accessed in every interceptor). 131static ALIGNED(64) char libignore_placeholder[sizeof(LibIgnore)]; 132static LibIgnore *libignore() { 133 return reinterpret_cast<LibIgnore*>(&libignore_placeholder[0]); 134} 135 136void InitializeLibIgnore() { 137 libignore()->Init(*GetSuppressionContext()); 138 libignore()->OnLibraryLoaded(0); 139} 140 141} // namespace __tsan 142 143static SignalContext *SigCtx(ThreadState *thr) { 144 SignalContext *ctx = (SignalContext*)thr->signal_ctx; 145 if (ctx == 0 && thr->is_alive) { 146 ScopedInRtl in_rtl; 147 ctx = (SignalContext*)MmapOrDie(sizeof(*ctx), "SignalContext"); 148 MemoryResetRange(thr, (uptr)&SigCtx, (uptr)ctx, sizeof(*ctx)); 149 thr->signal_ctx = ctx; 150 } 151 return ctx; 152} 153 154static unsigned g_thread_finalize_key; 155 156class ScopedInterceptor { 157 public: 158 ScopedInterceptor(ThreadState *thr, const char *fname, uptr pc); 159 ~ScopedInterceptor(); 160 private: 161 ThreadState *const thr_; 162 const int in_rtl_; 163 bool in_ignored_lib_; 164}; 165 166ScopedInterceptor::ScopedInterceptor(ThreadState *thr, const char *fname, 167 uptr pc) 168 : thr_(thr) 169 , in_rtl_(thr->in_rtl) 170 , in_ignored_lib_(false) { 171 if (thr_->in_rtl == 0) { 172 Initialize(thr); 173 FuncEntry(thr, pc); 174 thr_->in_rtl++; 175 DPrintf("#%d: intercept %s()\n", thr_->tid, fname); 176 } else { 177 thr_->in_rtl++; 178 } 179 if (!thr_->in_ignored_lib && libignore()->IsIgnored(pc)) { 180 in_ignored_lib_ = true; 181 thr_->in_ignored_lib = true; 182 ThreadIgnoreBegin(thr_); 183 } 184} 185 186ScopedInterceptor::~ScopedInterceptor() { 187 if (in_ignored_lib_) { 188 thr_->in_ignored_lib = false; 189 ThreadIgnoreEnd(thr_); 190 } 191 thr_->in_rtl--; 192 if (thr_->in_rtl == 0) { 193 FuncExit(thr_); 194 ProcessPendingSignals(thr_); 195 } 196 CHECK_EQ(in_rtl_, thr_->in_rtl); 197} 198 199#define SCOPED_INTERCEPTOR_RAW(func, ...) \ 200 ThreadState *thr = cur_thread(); \ 201 StatInc(thr, StatInterceptor); \ 202 StatInc(thr, StatInt_##func); \ 203 const uptr caller_pc = GET_CALLER_PC(); \ 204 ScopedInterceptor si(thr, #func, caller_pc); \ 205 const uptr pc = __sanitizer::StackTrace::GetCurrentPc(); \ 206 (void)pc; \ 207/**/ 208 209#define SCOPED_TSAN_INTERCEPTOR(func, ...) \ 210 SCOPED_INTERCEPTOR_RAW(func, __VA_ARGS__); \ 211 if (REAL(func) == 0) { \ 212 Printf("FATAL: ThreadSanitizer: failed to intercept %s\n", #func); \ 213 Die(); \ 214 } \ 215 if (thr->in_rtl > 1 || thr->in_ignored_lib) \ 216 return REAL(func)(__VA_ARGS__); \ 217/**/ 218 219#define TSAN_INTERCEPTOR(ret, func, ...) INTERCEPTOR(ret, func, __VA_ARGS__) 220#define TSAN_INTERCEPT(func) INTERCEPT_FUNCTION(func) 221 222#define BLOCK_REAL(name) (BlockingCall(thr), REAL(name)) 223 224struct BlockingCall { 225 explicit BlockingCall(ThreadState *thr) 226 : ctx(SigCtx(thr)) { 227 ctx->in_blocking_func++; 228 } 229 230 ~BlockingCall() { 231 ctx->in_blocking_func--; 232 } 233 234 SignalContext *ctx; 235}; 236 237TSAN_INTERCEPTOR(unsigned, sleep, unsigned sec) { 238 SCOPED_TSAN_INTERCEPTOR(sleep, sec); 239 unsigned res = BLOCK_REAL(sleep)(sec); 240 AfterSleep(thr, pc); 241 return res; 242} 243 244TSAN_INTERCEPTOR(int, usleep, long_t usec) { 245 SCOPED_TSAN_INTERCEPTOR(usleep, usec); 246 int res = BLOCK_REAL(usleep)(usec); 247 AfterSleep(thr, pc); 248 return res; 249} 250 251TSAN_INTERCEPTOR(int, nanosleep, void *req, void *rem) { 252 SCOPED_TSAN_INTERCEPTOR(nanosleep, req, rem); 253 int res = BLOCK_REAL(nanosleep)(req, rem); 254 AfterSleep(thr, pc); 255 return res; 256} 257 258TSAN_INTERCEPTOR(void*, dlopen, const char *filename, int flag) { 259 SCOPED_INTERCEPTOR_RAW(dlopen, filename, flag); 260 // dlopen will execute global constructors, so it must be not in rtl. 261 CHECK_EQ(thr->in_rtl, 1); 262 thr->in_rtl = 0; 263 void *res = REAL(dlopen)(filename, flag); 264 thr->in_rtl = 1; 265 libignore()->OnLibraryLoaded(filename); 266 return res; 267} 268 269TSAN_INTERCEPTOR(int, dlclose, void *handle) { 270 SCOPED_INTERCEPTOR_RAW(dlclose, handle); 271 // dlclose will execute global destructors, so it must be not in rtl. 272 CHECK_EQ(thr->in_rtl, 1); 273 thr->in_rtl = 0; 274 int res = REAL(dlclose)(handle); 275 thr->in_rtl = 1; 276 libignore()->OnLibraryUnloaded(); 277 return res; 278} 279 280class AtExitContext { 281 public: 282 AtExitContext() 283 : mtx_(MutexTypeAtExit, StatMtxAtExit) 284 , pos_() { 285 } 286 287 typedef void(*atexit_t)(); 288 289 int atexit(ThreadState *thr, uptr pc, bool is_on_exit, 290 atexit_t f, void *arg) { 291 Lock l(&mtx_); 292 if (pos_ == kMaxAtExit) 293 return 1; 294 Release(thr, pc, (uptr)this); 295 stack_[pos_] = f; 296 args_[pos_] = arg; 297 is_on_exits_[pos_] = is_on_exit; 298 pos_++; 299 return 0; 300 } 301 302 void exit(ThreadState *thr, uptr pc) { 303 CHECK_EQ(thr->in_rtl, 0); 304 for (;;) { 305 atexit_t f = 0; 306 void *arg = 0; 307 bool is_on_exit = false; 308 { 309 Lock l(&mtx_); 310 if (pos_) { 311 pos_--; 312 f = stack_[pos_]; 313 arg = args_[pos_]; 314 is_on_exit = is_on_exits_[pos_]; 315 ScopedInRtl in_rtl; 316 Acquire(thr, pc, (uptr)this); 317 } 318 } 319 if (f == 0) 320 break; 321 DPrintf("#%d: executing atexit func %p\n", thr->tid, f); 322 CHECK_EQ(thr->in_rtl, 0); 323 if (is_on_exit) 324 ((void(*)(int status, void *arg))f)(0, arg); 325 else 326 ((void(*)(void *arg, void *dso))f)(arg, 0); 327 } 328 } 329 330 private: 331 static const int kMaxAtExit = 128; 332 Mutex mtx_; 333 atexit_t stack_[kMaxAtExit]; 334 void *args_[kMaxAtExit]; 335 bool is_on_exits_[kMaxAtExit]; 336 int pos_; 337}; 338 339static AtExitContext *atexit_ctx; 340 341TSAN_INTERCEPTOR(int, atexit, void (*f)()) { 342 if (cur_thread()->in_symbolizer) 343 return 0; 344 SCOPED_TSAN_INTERCEPTOR(atexit, f); 345 return atexit_ctx->atexit(thr, pc, false, (void(*)())f, 0); 346} 347 348TSAN_INTERCEPTOR(int, on_exit, void(*f)(int, void*), void *arg) { 349 if (cur_thread()->in_symbolizer) 350 return 0; 351 SCOPED_TSAN_INTERCEPTOR(on_exit, f, arg); 352 return atexit_ctx->atexit(thr, pc, true, (void(*)())f, arg); 353} 354 355TSAN_INTERCEPTOR(int, __cxa_atexit, void (*f)(void *a), void *arg, void *dso) { 356 if (cur_thread()->in_symbolizer) 357 return 0; 358 SCOPED_TSAN_INTERCEPTOR(__cxa_atexit, f, arg, dso); 359 if (dso) { 360 // Memory allocation in __cxa_atexit will race with free during exit, 361 // because we do not see synchronization around atexit callback list. 362 ThreadIgnoreBegin(thr); 363 int res = REAL(__cxa_atexit)(f, arg, dso); 364 ThreadIgnoreEnd(thr); 365 return res; 366 } 367 return atexit_ctx->atexit(thr, pc, false, (void(*)())f, arg); 368} 369 370// Cleanup old bufs. 371static void JmpBufGarbageCollect(ThreadState *thr, uptr sp) { 372 for (uptr i = 0; i < thr->jmp_bufs.Size(); i++) { 373 JmpBuf *buf = &thr->jmp_bufs[i]; 374 if (buf->sp <= sp) { 375 uptr sz = thr->jmp_bufs.Size(); 376 thr->jmp_bufs[i] = thr->jmp_bufs[sz - 1]; 377 thr->jmp_bufs.PopBack(); 378 i--; 379 } 380 } 381} 382 383static void SetJmp(ThreadState *thr, uptr sp, uptr mangled_sp) { 384 if (thr->shadow_stack_pos == 0) // called from libc guts during bootstrap 385 return; 386 // Cleanup old bufs. 387 JmpBufGarbageCollect(thr, sp); 388 // Remember the buf. 389 JmpBuf *buf = thr->jmp_bufs.PushBack(); 390 buf->sp = sp; 391 buf->mangled_sp = mangled_sp; 392 buf->shadow_stack_pos = thr->shadow_stack_pos; 393} 394 395static void LongJmp(ThreadState *thr, uptr *env) { 396 uptr mangled_sp = env[6]; 397 // Find the saved buf by mangled_sp. 398 for (uptr i = 0; i < thr->jmp_bufs.Size(); i++) { 399 JmpBuf *buf = &thr->jmp_bufs[i]; 400 if (buf->mangled_sp == mangled_sp) { 401 CHECK_GE(thr->shadow_stack_pos, buf->shadow_stack_pos); 402 // Unwind the stack. 403 while (thr->shadow_stack_pos > buf->shadow_stack_pos) 404 FuncExit(thr); 405 JmpBufGarbageCollect(thr, buf->sp - 1); // do not collect buf->sp 406 return; 407 } 408 } 409 Printf("ThreadSanitizer: can't find longjmp buf\n"); 410 CHECK(0); 411} 412 413// FIXME: put everything below into a common extern "C" block? 414extern "C" void __tsan_setjmp(uptr sp, uptr mangled_sp) { 415 ScopedInRtl in_rtl; 416 SetJmp(cur_thread(), sp, mangled_sp); 417} 418 419// Not called. Merely to satisfy TSAN_INTERCEPT(). 420extern "C" SANITIZER_INTERFACE_ATTRIBUTE 421int __interceptor_setjmp(void *env); 422extern "C" int __interceptor_setjmp(void *env) { 423 CHECK(0); 424 return 0; 425} 426 427// FIXME: any reason to have a separate declaration? 428extern "C" SANITIZER_INTERFACE_ATTRIBUTE 429int __interceptor__setjmp(void *env); 430extern "C" int __interceptor__setjmp(void *env) { 431 CHECK(0); 432 return 0; 433} 434 435extern "C" SANITIZER_INTERFACE_ATTRIBUTE 436int __interceptor_sigsetjmp(void *env); 437extern "C" int __interceptor_sigsetjmp(void *env) { 438 CHECK(0); 439 return 0; 440} 441 442extern "C" SANITIZER_INTERFACE_ATTRIBUTE 443int __interceptor___sigsetjmp(void *env); 444extern "C" int __interceptor___sigsetjmp(void *env) { 445 CHECK(0); 446 return 0; 447} 448 449extern "C" int setjmp(void *env); 450extern "C" int _setjmp(void *env); 451extern "C" int sigsetjmp(void *env); 452extern "C" int __sigsetjmp(void *env); 453DEFINE_REAL(int, setjmp, void *env) 454DEFINE_REAL(int, _setjmp, void *env) 455DEFINE_REAL(int, sigsetjmp, void *env) 456DEFINE_REAL(int, __sigsetjmp, void *env) 457 458TSAN_INTERCEPTOR(void, longjmp, uptr *env, int val) { 459 { 460 SCOPED_TSAN_INTERCEPTOR(longjmp, env, val); 461 } 462 LongJmp(cur_thread(), env); 463 REAL(longjmp)(env, val); 464} 465 466TSAN_INTERCEPTOR(void, siglongjmp, uptr *env, int val) { 467 { 468 SCOPED_TSAN_INTERCEPTOR(siglongjmp, env, val); 469 } 470 LongJmp(cur_thread(), env); 471 REAL(siglongjmp)(env, val); 472} 473 474TSAN_INTERCEPTOR(void*, malloc, uptr size) { 475 if (cur_thread()->in_symbolizer) 476 return __libc_malloc(size); 477 void *p = 0; 478 { 479 SCOPED_INTERCEPTOR_RAW(malloc, size); 480 p = user_alloc(thr, pc, size); 481 } 482 invoke_malloc_hook(p, size); 483 return p; 484} 485 486TSAN_INTERCEPTOR(void*, __libc_memalign, uptr align, uptr sz) { 487 SCOPED_TSAN_INTERCEPTOR(__libc_memalign, align, sz); 488 return user_alloc(thr, pc, sz, align); 489} 490 491TSAN_INTERCEPTOR(void*, calloc, uptr size, uptr n) { 492 if (cur_thread()->in_symbolizer) 493 return __libc_calloc(size, n); 494 if (__sanitizer::CallocShouldReturnNullDueToOverflow(size, n)) 495 return AllocatorReturnNull(); 496 void *p = 0; 497 { 498 SCOPED_INTERCEPTOR_RAW(calloc, size, n); 499 p = user_alloc(thr, pc, n * size); 500 if (p) 501 internal_memset(p, 0, n * size); 502 } 503 invoke_malloc_hook(p, n * size); 504 return p; 505} 506 507TSAN_INTERCEPTOR(void*, realloc, void *p, uptr size) { 508 if (cur_thread()->in_symbolizer) 509 return __libc_realloc(p, size); 510 if (p) 511 invoke_free_hook(p); 512 { 513 SCOPED_INTERCEPTOR_RAW(realloc, p, size); 514 p = user_realloc(thr, pc, p, size); 515 } 516 invoke_malloc_hook(p, size); 517 return p; 518} 519 520TSAN_INTERCEPTOR(void, free, void *p) { 521 if (p == 0) 522 return; 523 if (cur_thread()->in_symbolizer) 524 return __libc_free(p); 525 invoke_free_hook(p); 526 SCOPED_INTERCEPTOR_RAW(free, p); 527 user_free(thr, pc, p); 528} 529 530TSAN_INTERCEPTOR(void, cfree, void *p) { 531 if (p == 0) 532 return; 533 if (cur_thread()->in_symbolizer) 534 return __libc_free(p); 535 invoke_free_hook(p); 536 SCOPED_INTERCEPTOR_RAW(cfree, p); 537 user_free(thr, pc, p); 538} 539 540TSAN_INTERCEPTOR(uptr, malloc_usable_size, void *p) { 541 SCOPED_INTERCEPTOR_RAW(malloc_usable_size, p); 542 return user_alloc_usable_size(thr, pc, p); 543} 544 545#define OPERATOR_NEW_BODY(mangled_name) \ 546 if (cur_thread()->in_symbolizer) \ 547 return __libc_malloc(size); \ 548 void *p = 0; \ 549 { \ 550 SCOPED_INTERCEPTOR_RAW(mangled_name, size); \ 551 p = user_alloc(thr, pc, size); \ 552 } \ 553 invoke_malloc_hook(p, size); \ 554 return p; 555 556SANITIZER_INTERFACE_ATTRIBUTE 557void *operator new(__sanitizer::uptr size); 558void *operator new(__sanitizer::uptr size) { 559 OPERATOR_NEW_BODY(_Znwm); 560} 561 562SANITIZER_INTERFACE_ATTRIBUTE 563void *operator new[](__sanitizer::uptr size); 564void *operator new[](__sanitizer::uptr size) { 565 OPERATOR_NEW_BODY(_Znam); 566} 567 568SANITIZER_INTERFACE_ATTRIBUTE 569void *operator new(__sanitizer::uptr size, std::nothrow_t const&); 570void *operator new(__sanitizer::uptr size, std::nothrow_t const&) { 571 OPERATOR_NEW_BODY(_ZnwmRKSt9nothrow_t); 572} 573 574SANITIZER_INTERFACE_ATTRIBUTE 575void *operator new[](__sanitizer::uptr size, std::nothrow_t const&); 576void *operator new[](__sanitizer::uptr size, std::nothrow_t const&) { 577 OPERATOR_NEW_BODY(_ZnamRKSt9nothrow_t); 578} 579 580#define OPERATOR_DELETE_BODY(mangled_name) \ 581 if (ptr == 0) return; \ 582 if (cur_thread()->in_symbolizer) \ 583 return __libc_free(ptr); \ 584 invoke_free_hook(ptr); \ 585 SCOPED_INTERCEPTOR_RAW(mangled_name, ptr); \ 586 user_free(thr, pc, ptr); 587 588SANITIZER_INTERFACE_ATTRIBUTE 589void operator delete(void *ptr); 590void operator delete(void *ptr) { 591 OPERATOR_DELETE_BODY(_ZdlPv); 592} 593 594SANITIZER_INTERFACE_ATTRIBUTE 595void operator delete[](void *ptr); 596void operator delete[](void *ptr) { 597 OPERATOR_DELETE_BODY(_ZdlPvRKSt9nothrow_t); 598} 599 600SANITIZER_INTERFACE_ATTRIBUTE 601void operator delete(void *ptr, std::nothrow_t const&); 602void operator delete(void *ptr, std::nothrow_t const&) { 603 OPERATOR_DELETE_BODY(_ZdaPv); 604} 605 606SANITIZER_INTERFACE_ATTRIBUTE 607void operator delete[](void *ptr, std::nothrow_t const&); 608void operator delete[](void *ptr, std::nothrow_t const&) { 609 OPERATOR_DELETE_BODY(_ZdaPvRKSt9nothrow_t); 610} 611 612TSAN_INTERCEPTOR(uptr, strlen, const char *s) { 613 SCOPED_TSAN_INTERCEPTOR(strlen, s); 614 uptr len = internal_strlen(s); 615 MemoryAccessRange(thr, pc, (uptr)s, len + 1, false); 616 return len; 617} 618 619TSAN_INTERCEPTOR(void*, memset, void *dst, int v, uptr size) { 620 SCOPED_TSAN_INTERCEPTOR(memset, dst, v, size); 621 MemoryAccessRange(thr, pc, (uptr)dst, size, true); 622 return internal_memset(dst, v, size); 623} 624 625TSAN_INTERCEPTOR(void*, memcpy, void *dst, const void *src, uptr size) { 626 SCOPED_TSAN_INTERCEPTOR(memcpy, dst, src, size); 627 MemoryAccessRange(thr, pc, (uptr)dst, size, true); 628 MemoryAccessRange(thr, pc, (uptr)src, size, false); 629 return internal_memcpy(dst, src, size); 630} 631 632TSAN_INTERCEPTOR(int, memcmp, const void *s1, const void *s2, uptr n) { 633 SCOPED_TSAN_INTERCEPTOR(memcmp, s1, s2, n); 634 int res = 0; 635 uptr len = 0; 636 for (; len < n; len++) { 637 if ((res = ((unsigned char*)s1)[len] - ((unsigned char*)s2)[len])) 638 break; 639 } 640 MemoryAccessRange(thr, pc, (uptr)s1, len < n ? len + 1 : n, false); 641 MemoryAccessRange(thr, pc, (uptr)s2, len < n ? len + 1 : n, false); 642 return res; 643} 644 645TSAN_INTERCEPTOR(void*, memchr, void *s, int c, uptr n) { 646 SCOPED_TSAN_INTERCEPTOR(memchr, s, c, n); 647 void *res = REAL(memchr)(s, c, n); 648 uptr len = res ? (char*)res - (char*)s + 1 : n; 649 MemoryAccessRange(thr, pc, (uptr)s, len, false); 650 return res; 651} 652 653TSAN_INTERCEPTOR(void*, memrchr, char *s, int c, uptr n) { 654 SCOPED_TSAN_INTERCEPTOR(memrchr, s, c, n); 655 MemoryAccessRange(thr, pc, (uptr)s, n, false); 656 return REAL(memrchr)(s, c, n); 657} 658 659TSAN_INTERCEPTOR(void*, memmove, void *dst, void *src, uptr n) { 660 SCOPED_TSAN_INTERCEPTOR(memmove, dst, src, n); 661 MemoryAccessRange(thr, pc, (uptr)dst, n, true); 662 MemoryAccessRange(thr, pc, (uptr)src, n, false); 663 return REAL(memmove)(dst, src, n); 664} 665 666TSAN_INTERCEPTOR(char*, strchr, char *s, int c) { 667 SCOPED_TSAN_INTERCEPTOR(strchr, s, c); 668 char *res = REAL(strchr)(s, c); 669 uptr len = res ? (char*)res - (char*)s + 1 : internal_strlen(s) + 1; 670 MemoryAccessRange(thr, pc, (uptr)s, len, false); 671 return res; 672} 673 674TSAN_INTERCEPTOR(char*, strchrnul, char *s, int c) { 675 SCOPED_TSAN_INTERCEPTOR(strchrnul, s, c); 676 char *res = REAL(strchrnul)(s, c); 677 uptr len = (char*)res - (char*)s + 1; 678 MemoryAccessRange(thr, pc, (uptr)s, len, false); 679 return res; 680} 681 682TSAN_INTERCEPTOR(char*, strrchr, char *s, int c) { 683 SCOPED_TSAN_INTERCEPTOR(strrchr, s, c); 684 MemoryAccessRange(thr, pc, (uptr)s, internal_strlen(s) + 1, false); 685 return REAL(strrchr)(s, c); 686} 687 688TSAN_INTERCEPTOR(char*, strcpy, char *dst, const char *src) { // NOLINT 689 SCOPED_TSAN_INTERCEPTOR(strcpy, dst, src); // NOLINT 690 uptr srclen = internal_strlen(src); 691 MemoryAccessRange(thr, pc, (uptr)dst, srclen + 1, true); 692 MemoryAccessRange(thr, pc, (uptr)src, srclen + 1, false); 693 return REAL(strcpy)(dst, src); // NOLINT 694} 695 696TSAN_INTERCEPTOR(char*, strncpy, char *dst, char *src, uptr n) { 697 SCOPED_TSAN_INTERCEPTOR(strncpy, dst, src, n); 698 uptr srclen = internal_strnlen(src, n); 699 MemoryAccessRange(thr, pc, (uptr)dst, n, true); 700 MemoryAccessRange(thr, pc, (uptr)src, min(srclen + 1, n), false); 701 return REAL(strncpy)(dst, src, n); 702} 703 704TSAN_INTERCEPTOR(const char*, strstr, const char *s1, const char *s2) { 705 SCOPED_TSAN_INTERCEPTOR(strstr, s1, s2); 706 const char *res = REAL(strstr)(s1, s2); 707 uptr len1 = internal_strlen(s1); 708 uptr len2 = internal_strlen(s2); 709 MemoryAccessRange(thr, pc, (uptr)s1, len1 + 1, false); 710 MemoryAccessRange(thr, pc, (uptr)s2, len2 + 1, false); 711 return res; 712} 713 714TSAN_INTERCEPTOR(char*, strdup, const char *str) { 715 SCOPED_TSAN_INTERCEPTOR(strdup, str); 716 // strdup will call malloc, so no instrumentation is required here. 717 return REAL(strdup)(str); 718} 719 720static bool fix_mmap_addr(void **addr, long_t sz, int flags) { 721 if (*addr) { 722 if (!IsAppMem((uptr)*addr) || !IsAppMem((uptr)*addr + sz - 1)) { 723 if (flags & MAP_FIXED) { 724 errno = EINVAL; 725 return false; 726 } else { 727 *addr = 0; 728 } 729 } 730 } 731 return true; 732} 733 734TSAN_INTERCEPTOR(void*, mmap, void *addr, long_t sz, int prot, 735 int flags, int fd, unsigned off) { 736 SCOPED_TSAN_INTERCEPTOR(mmap, addr, sz, prot, flags, fd, off); 737 if (!fix_mmap_addr(&addr, sz, flags)) 738 return MAP_FAILED; 739 void *res = REAL(mmap)(addr, sz, prot, flags, fd, off); 740 if (res != MAP_FAILED) { 741 if (fd > 0) 742 FdAccess(thr, pc, fd); 743 MemoryRangeImitateWrite(thr, pc, (uptr)res, sz); 744 } 745 return res; 746} 747 748TSAN_INTERCEPTOR(void*, mmap64, void *addr, long_t sz, int prot, 749 int flags, int fd, u64 off) { 750 SCOPED_TSAN_INTERCEPTOR(mmap64, addr, sz, prot, flags, fd, off); 751 if (!fix_mmap_addr(&addr, sz, flags)) 752 return MAP_FAILED; 753 void *res = REAL(mmap64)(addr, sz, prot, flags, fd, off); 754 if (res != MAP_FAILED) { 755 if (fd > 0) 756 FdAccess(thr, pc, fd); 757 MemoryRangeImitateWrite(thr, pc, (uptr)res, sz); 758 } 759 return res; 760} 761 762TSAN_INTERCEPTOR(int, munmap, void *addr, long_t sz) { 763 SCOPED_TSAN_INTERCEPTOR(munmap, addr, sz); 764 DontNeedShadowFor((uptr)addr, sz); 765 int res = REAL(munmap)(addr, sz); 766 return res; 767} 768 769TSAN_INTERCEPTOR(void*, memalign, uptr align, uptr sz) { 770 SCOPED_INTERCEPTOR_RAW(memalign, align, sz); 771 return user_alloc(thr, pc, sz, align); 772} 773 774TSAN_INTERCEPTOR(void*, valloc, uptr sz) { 775 SCOPED_INTERCEPTOR_RAW(valloc, sz); 776 return user_alloc(thr, pc, sz, GetPageSizeCached()); 777} 778 779TSAN_INTERCEPTOR(void*, pvalloc, uptr sz) { 780 SCOPED_INTERCEPTOR_RAW(pvalloc, sz); 781 sz = RoundUp(sz, GetPageSizeCached()); 782 return user_alloc(thr, pc, sz, GetPageSizeCached()); 783} 784 785TSAN_INTERCEPTOR(int, posix_memalign, void **memptr, uptr align, uptr sz) { 786 SCOPED_INTERCEPTOR_RAW(posix_memalign, memptr, align, sz); 787 *memptr = user_alloc(thr, pc, sz, align); 788 return 0; 789} 790 791// Used in thread-safe function static initialization. 792extern "C" int INTERFACE_ATTRIBUTE __cxa_guard_acquire(atomic_uint32_t *g) { 793 SCOPED_INTERCEPTOR_RAW(__cxa_guard_acquire, g); 794 for (;;) { 795 u32 cmp = atomic_load(g, memory_order_acquire); 796 if (cmp == 0) { 797 if (atomic_compare_exchange_strong(g, &cmp, 1<<16, memory_order_relaxed)) 798 return 1; 799 } else if (cmp == 1) { 800 Acquire(thr, pc, (uptr)g); 801 return 0; 802 } else { 803 internal_sched_yield(); 804 } 805 } 806} 807 808extern "C" void INTERFACE_ATTRIBUTE __cxa_guard_release(atomic_uint32_t *g) { 809 SCOPED_INTERCEPTOR_RAW(__cxa_guard_release, g); 810 Release(thr, pc, (uptr)g); 811 atomic_store(g, 1, memory_order_release); 812} 813 814extern "C" void INTERFACE_ATTRIBUTE __cxa_guard_abort(atomic_uint32_t *g) { 815 SCOPED_INTERCEPTOR_RAW(__cxa_guard_abort, g); 816 atomic_store(g, 0, memory_order_relaxed); 817} 818 819static void thread_finalize(void *v) { 820 uptr iter = (uptr)v; 821 if (iter > 1) { 822 if (pthread_setspecific(g_thread_finalize_key, (void*)(iter - 1))) { 823 Printf("ThreadSanitizer: failed to set thread key\n"); 824 Die(); 825 } 826 return; 827 } 828 { 829 ScopedInRtl in_rtl; 830 ThreadState *thr = cur_thread(); 831 ThreadFinish(thr); 832 SignalContext *sctx = thr->signal_ctx; 833 if (sctx) { 834 thr->signal_ctx = 0; 835 UnmapOrDie(sctx, sizeof(*sctx)); 836 } 837 } 838} 839 840 841struct ThreadParam { 842 void* (*callback)(void *arg); 843 void *param; 844 atomic_uintptr_t tid; 845}; 846 847extern "C" void *__tsan_thread_start_func(void *arg) { 848 ThreadParam *p = (ThreadParam*)arg; 849 void* (*callback)(void *arg) = p->callback; 850 void *param = p->param; 851 int tid = 0; 852 { 853 ThreadState *thr = cur_thread(); 854 ScopedInRtl in_rtl; 855 if (pthread_setspecific(g_thread_finalize_key, 856 (void *)kPthreadDestructorIterations)) { 857 Printf("ThreadSanitizer: failed to set thread key\n"); 858 Die(); 859 } 860 while ((tid = atomic_load(&p->tid, memory_order_acquire)) == 0) 861 pthread_yield(); 862 atomic_store(&p->tid, 0, memory_order_release); 863 ThreadStart(thr, tid, GetTid()); 864 CHECK_EQ(thr->in_rtl, 1); 865 } 866 void *res = callback(param); 867 // Prevent the callback from being tail called, 868 // it mixes up stack traces. 869 volatile int foo = 42; 870 foo++; 871 return res; 872} 873 874TSAN_INTERCEPTOR(int, pthread_create, 875 void *th, void *attr, void *(*callback)(void*), void * param) { 876 SCOPED_INTERCEPTOR_RAW(pthread_create, th, attr, callback, param); 877 __sanitizer_pthread_attr_t myattr; 878 if (attr == 0) { 879 pthread_attr_init(&myattr); 880 attr = &myattr; 881 } 882 int detached = 0; 883 REAL(pthread_attr_getdetachstate)(attr, &detached); 884 AdjustStackSizeLinux(attr); 885 886 ThreadParam p; 887 p.callback = callback; 888 p.param = param; 889 atomic_store(&p.tid, 0, memory_order_relaxed); 890 int res = REAL(pthread_create)(th, attr, __tsan_thread_start_func, &p); 891 if (res == 0) { 892 int tid = ThreadCreate(thr, pc, *(uptr*)th, detached); 893 CHECK_NE(tid, 0); 894 atomic_store(&p.tid, tid, memory_order_release); 895 while (atomic_load(&p.tid, memory_order_acquire) != 0) 896 pthread_yield(); 897 } 898 if (attr == &myattr) 899 pthread_attr_destroy(&myattr); 900 return res; 901} 902 903TSAN_INTERCEPTOR(int, pthread_join, void *th, void **ret) { 904 SCOPED_INTERCEPTOR_RAW(pthread_join, th, ret); 905 int tid = ThreadTid(thr, pc, (uptr)th); 906 int res = BLOCK_REAL(pthread_join)(th, ret); 907 if (res == 0) { 908 ThreadJoin(thr, pc, tid); 909 } 910 return res; 911} 912 913TSAN_INTERCEPTOR(int, pthread_detach, void *th) { 914 SCOPED_TSAN_INTERCEPTOR(pthread_detach, th); 915 int tid = ThreadTid(thr, pc, (uptr)th); 916 int res = REAL(pthread_detach)(th); 917 if (res == 0) { 918 ThreadDetach(thr, pc, tid); 919 } 920 return res; 921} 922 923TSAN_INTERCEPTOR(int, pthread_mutex_init, void *m, void *a) { 924 SCOPED_TSAN_INTERCEPTOR(pthread_mutex_init, m, a); 925 int res = REAL(pthread_mutex_init)(m, a); 926 if (res == 0) { 927 bool recursive = false; 928 if (a) { 929 int type = 0; 930 if (pthread_mutexattr_gettype(a, &type) == 0) 931 recursive = (type == PTHREAD_MUTEX_RECURSIVE 932 || type == PTHREAD_MUTEX_RECURSIVE_NP); 933 } 934 MutexCreate(thr, pc, (uptr)m, false, recursive, false); 935 } 936 return res; 937} 938 939TSAN_INTERCEPTOR(int, pthread_mutex_destroy, void *m) { 940 SCOPED_TSAN_INTERCEPTOR(pthread_mutex_destroy, m); 941 int res = REAL(pthread_mutex_destroy)(m); 942 if (res == 0 || res == EBUSY) { 943 MutexDestroy(thr, pc, (uptr)m); 944 } 945 return res; 946} 947 948TSAN_INTERCEPTOR(int, pthread_mutex_trylock, void *m) { 949 SCOPED_TSAN_INTERCEPTOR(pthread_mutex_trylock, m); 950 int res = REAL(pthread_mutex_trylock)(m); 951 if (res == 0) { 952 MutexLock(thr, pc, (uptr)m); 953 } 954 return res; 955} 956 957TSAN_INTERCEPTOR(int, pthread_mutex_timedlock, void *m, void *abstime) { 958 SCOPED_TSAN_INTERCEPTOR(pthread_mutex_timedlock, m, abstime); 959 int res = REAL(pthread_mutex_timedlock)(m, abstime); 960 if (res == 0) { 961 MutexLock(thr, pc, (uptr)m); 962 } 963 return res; 964} 965 966TSAN_INTERCEPTOR(int, pthread_spin_init, void *m, int pshared) { 967 SCOPED_TSAN_INTERCEPTOR(pthread_spin_init, m, pshared); 968 int res = REAL(pthread_spin_init)(m, pshared); 969 if (res == 0) { 970 MutexCreate(thr, pc, (uptr)m, false, false, false); 971 } 972 return res; 973} 974 975TSAN_INTERCEPTOR(int, pthread_spin_destroy, void *m) { 976 SCOPED_TSAN_INTERCEPTOR(pthread_spin_destroy, m); 977 int res = REAL(pthread_spin_destroy)(m); 978 if (res == 0) { 979 MutexDestroy(thr, pc, (uptr)m); 980 } 981 return res; 982} 983 984TSAN_INTERCEPTOR(int, pthread_spin_lock, void *m) { 985 SCOPED_TSAN_INTERCEPTOR(pthread_spin_lock, m); 986 int res = REAL(pthread_spin_lock)(m); 987 if (res == 0) { 988 MutexLock(thr, pc, (uptr)m); 989 } 990 return res; 991} 992 993TSAN_INTERCEPTOR(int, pthread_spin_trylock, void *m) { 994 SCOPED_TSAN_INTERCEPTOR(pthread_spin_trylock, m); 995 int res = REAL(pthread_spin_trylock)(m); 996 if (res == 0) { 997 MutexLock(thr, pc, (uptr)m); 998 } 999 return res; 1000} 1001 1002TSAN_INTERCEPTOR(int, pthread_spin_unlock, void *m) { 1003 SCOPED_TSAN_INTERCEPTOR(pthread_spin_unlock, m); 1004 MutexUnlock(thr, pc, (uptr)m); 1005 int res = REAL(pthread_spin_unlock)(m); 1006 return res; 1007} 1008 1009TSAN_INTERCEPTOR(int, pthread_rwlock_init, void *m, void *a) { 1010 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_init, m, a); 1011 int res = REAL(pthread_rwlock_init)(m, a); 1012 if (res == 0) { 1013 MutexCreate(thr, pc, (uptr)m, true, false, false); 1014 } 1015 return res; 1016} 1017 1018TSAN_INTERCEPTOR(int, pthread_rwlock_destroy, void *m) { 1019 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_destroy, m); 1020 int res = REAL(pthread_rwlock_destroy)(m); 1021 if (res == 0) { 1022 MutexDestroy(thr, pc, (uptr)m); 1023 } 1024 return res; 1025} 1026 1027TSAN_INTERCEPTOR(int, pthread_rwlock_rdlock, void *m) { 1028 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_rdlock, m); 1029 int res = REAL(pthread_rwlock_rdlock)(m); 1030 if (res == 0) { 1031 MutexReadLock(thr, pc, (uptr)m); 1032 } 1033 return res; 1034} 1035 1036TSAN_INTERCEPTOR(int, pthread_rwlock_tryrdlock, void *m) { 1037 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_tryrdlock, m); 1038 int res = REAL(pthread_rwlock_tryrdlock)(m); 1039 if (res == 0) { 1040 MutexReadLock(thr, pc, (uptr)m); 1041 } 1042 return res; 1043} 1044 1045TSAN_INTERCEPTOR(int, pthread_rwlock_timedrdlock, void *m, void *abstime) { 1046 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_timedrdlock, m, abstime); 1047 int res = REAL(pthread_rwlock_timedrdlock)(m, abstime); 1048 if (res == 0) { 1049 MutexReadLock(thr, pc, (uptr)m); 1050 } 1051 return res; 1052} 1053 1054TSAN_INTERCEPTOR(int, pthread_rwlock_wrlock, void *m) { 1055 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_wrlock, m); 1056 int res = REAL(pthread_rwlock_wrlock)(m); 1057 if (res == 0) { 1058 MutexLock(thr, pc, (uptr)m); 1059 } 1060 return res; 1061} 1062 1063TSAN_INTERCEPTOR(int, pthread_rwlock_trywrlock, void *m) { 1064 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_trywrlock, m); 1065 int res = REAL(pthread_rwlock_trywrlock)(m); 1066 if (res == 0) { 1067 MutexLock(thr, pc, (uptr)m); 1068 } 1069 return res; 1070} 1071 1072TSAN_INTERCEPTOR(int, pthread_rwlock_timedwrlock, void *m, void *abstime) { 1073 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_timedwrlock, m, abstime); 1074 int res = REAL(pthread_rwlock_timedwrlock)(m, abstime); 1075 if (res == 0) { 1076 MutexLock(thr, pc, (uptr)m); 1077 } 1078 return res; 1079} 1080 1081TSAN_INTERCEPTOR(int, pthread_rwlock_unlock, void *m) { 1082 SCOPED_TSAN_INTERCEPTOR(pthread_rwlock_unlock, m); 1083 MutexReadOrWriteUnlock(thr, pc, (uptr)m); 1084 int res = REAL(pthread_rwlock_unlock)(m); 1085 return res; 1086} 1087 1088TSAN_INTERCEPTOR(int, pthread_cond_destroy, void *c) { 1089 SCOPED_TSAN_INTERCEPTOR(pthread_cond_destroy, c); 1090 MemoryWrite(thr, pc, (uptr)c, kSizeLog1); 1091 int res = REAL(pthread_cond_destroy)(c); 1092 return res; 1093} 1094 1095TSAN_INTERCEPTOR(int, pthread_cond_timedwait, void *c, void *m, 1096 void *abstime) { 1097 SCOPED_TSAN_INTERCEPTOR(pthread_cond_timedwait, c, m, abstime); 1098 MutexUnlock(thr, pc, (uptr)m); 1099 MemoryRead(thr, pc, (uptr)c, kSizeLog1); 1100 int res = REAL(pthread_cond_timedwait)(c, m, abstime); 1101 MutexLock(thr, pc, (uptr)m); 1102 return res; 1103} 1104 1105TSAN_INTERCEPTOR(int, pthread_barrier_init, void *b, void *a, unsigned count) { 1106 SCOPED_TSAN_INTERCEPTOR(pthread_barrier_init, b, a, count); 1107 MemoryWrite(thr, pc, (uptr)b, kSizeLog1); 1108 int res = REAL(pthread_barrier_init)(b, a, count); 1109 return res; 1110} 1111 1112TSAN_INTERCEPTOR(int, pthread_barrier_destroy, void *b) { 1113 SCOPED_TSAN_INTERCEPTOR(pthread_barrier_destroy, b); 1114 MemoryWrite(thr, pc, (uptr)b, kSizeLog1); 1115 int res = REAL(pthread_barrier_destroy)(b); 1116 return res; 1117} 1118 1119TSAN_INTERCEPTOR(int, pthread_barrier_wait, void *b) { 1120 SCOPED_TSAN_INTERCEPTOR(pthread_barrier_wait, b); 1121 Release(thr, pc, (uptr)b); 1122 MemoryRead(thr, pc, (uptr)b, kSizeLog1); 1123 int res = REAL(pthread_barrier_wait)(b); 1124 MemoryRead(thr, pc, (uptr)b, kSizeLog1); 1125 if (res == 0 || res == PTHREAD_BARRIER_SERIAL_THREAD) { 1126 Acquire(thr, pc, (uptr)b); 1127 } 1128 return res; 1129} 1130 1131TSAN_INTERCEPTOR(int, pthread_once, void *o, void (*f)()) { 1132 SCOPED_INTERCEPTOR_RAW(pthread_once, o, f); 1133 // Using SCOPED_INTERCEPTOR_RAW, because if we are called from an ignored lib, 1134 // the user callback must be executed with thr->in_rtl == 0. 1135 if (o == 0 || f == 0) 1136 return EINVAL; 1137 atomic_uint32_t *a = static_cast<atomic_uint32_t*>(o); 1138 u32 v = atomic_load(a, memory_order_acquire); 1139 if (v == 0 && atomic_compare_exchange_strong(a, &v, 1, 1140 memory_order_relaxed)) { 1141 const int old_in_rtl = thr->in_rtl; 1142 thr->in_rtl = 0; 1143 (*f)(); 1144 CHECK_EQ(thr->in_rtl, 0); 1145 thr->in_rtl = old_in_rtl; 1146 if (!thr->in_ignored_lib) 1147 Release(thr, pc, (uptr)o); 1148 atomic_store(a, 2, memory_order_release); 1149 } else { 1150 while (v != 2) { 1151 pthread_yield(); 1152 v = atomic_load(a, memory_order_acquire); 1153 } 1154 if (!thr->in_ignored_lib) 1155 Acquire(thr, pc, (uptr)o); 1156 } 1157 return 0; 1158} 1159 1160TSAN_INTERCEPTOR(int, sem_init, void *s, int pshared, unsigned value) { 1161 SCOPED_TSAN_INTERCEPTOR(sem_init, s, pshared, value); 1162 int res = REAL(sem_init)(s, pshared, value); 1163 return res; 1164} 1165 1166TSAN_INTERCEPTOR(int, sem_destroy, void *s) { 1167 SCOPED_TSAN_INTERCEPTOR(sem_destroy, s); 1168 int res = REAL(sem_destroy)(s); 1169 return res; 1170} 1171 1172TSAN_INTERCEPTOR(int, sem_wait, void *s) { 1173 SCOPED_TSAN_INTERCEPTOR(sem_wait, s); 1174 int res = BLOCK_REAL(sem_wait)(s); 1175 if (res == 0) { 1176 Acquire(thr, pc, (uptr)s); 1177 } 1178 return res; 1179} 1180 1181TSAN_INTERCEPTOR(int, sem_trywait, void *s) { 1182 SCOPED_TSAN_INTERCEPTOR(sem_trywait, s); 1183 int res = BLOCK_REAL(sem_trywait)(s); 1184 if (res == 0) { 1185 Acquire(thr, pc, (uptr)s); 1186 } 1187 return res; 1188} 1189 1190TSAN_INTERCEPTOR(int, sem_timedwait, void *s, void *abstime) { 1191 SCOPED_TSAN_INTERCEPTOR(sem_timedwait, s, abstime); 1192 int res = BLOCK_REAL(sem_timedwait)(s, abstime); 1193 if (res == 0) { 1194 Acquire(thr, pc, (uptr)s); 1195 } 1196 return res; 1197} 1198 1199TSAN_INTERCEPTOR(int, sem_post, void *s) { 1200 SCOPED_TSAN_INTERCEPTOR(sem_post, s); 1201 Release(thr, pc, (uptr)s); 1202 int res = REAL(sem_post)(s); 1203 return res; 1204} 1205 1206TSAN_INTERCEPTOR(int, sem_getvalue, void *s, int *sval) { 1207 SCOPED_TSAN_INTERCEPTOR(sem_getvalue, s, sval); 1208 int res = REAL(sem_getvalue)(s, sval); 1209 if (res == 0) { 1210 Acquire(thr, pc, (uptr)s); 1211 } 1212 return res; 1213} 1214 1215TSAN_INTERCEPTOR(int, __xstat, int version, const char *path, void *buf) { 1216 SCOPED_TSAN_INTERCEPTOR(__xstat, version, path, buf); 1217 return REAL(__xstat)(version, path, buf); 1218} 1219 1220TSAN_INTERCEPTOR(int, stat, const char *path, void *buf) { 1221 SCOPED_TSAN_INTERCEPTOR(__xstat, 0, path, buf); 1222 return REAL(__xstat)(0, path, buf); 1223} 1224 1225TSAN_INTERCEPTOR(int, __xstat64, int version, const char *path, void *buf) { 1226 SCOPED_TSAN_INTERCEPTOR(__xstat64, version, path, buf); 1227 return REAL(__xstat64)(version, path, buf); 1228} 1229 1230TSAN_INTERCEPTOR(int, stat64, const char *path, void *buf) { 1231 SCOPED_TSAN_INTERCEPTOR(__xstat64, 0, path, buf); 1232 return REAL(__xstat64)(0, path, buf); 1233} 1234 1235TSAN_INTERCEPTOR(int, __lxstat, int version, const char *path, void *buf) { 1236 SCOPED_TSAN_INTERCEPTOR(__lxstat, version, path, buf); 1237 return REAL(__lxstat)(version, path, buf); 1238} 1239 1240TSAN_INTERCEPTOR(int, lstat, const char *path, void *buf) { 1241 SCOPED_TSAN_INTERCEPTOR(__lxstat, 0, path, buf); 1242 return REAL(__lxstat)(0, path, buf); 1243} 1244 1245TSAN_INTERCEPTOR(int, __lxstat64, int version, const char *path, void *buf) { 1246 SCOPED_TSAN_INTERCEPTOR(__lxstat64, version, path, buf); 1247 return REAL(__lxstat64)(version, path, buf); 1248} 1249 1250TSAN_INTERCEPTOR(int, lstat64, const char *path, void *buf) { 1251 SCOPED_TSAN_INTERCEPTOR(__lxstat64, 0, path, buf); 1252 return REAL(__lxstat64)(0, path, buf); 1253} 1254 1255TSAN_INTERCEPTOR(int, __fxstat, int version, int fd, void *buf) { 1256 SCOPED_TSAN_INTERCEPTOR(__fxstat, version, fd, buf); 1257 if (fd > 0) 1258 FdAccess(thr, pc, fd); 1259 return REAL(__fxstat)(version, fd, buf); 1260} 1261 1262TSAN_INTERCEPTOR(int, fstat, int fd, void *buf) { 1263 SCOPED_TSAN_INTERCEPTOR(__fxstat, 0, fd, buf); 1264 if (fd > 0) 1265 FdAccess(thr, pc, fd); 1266 return REAL(__fxstat)(0, fd, buf); 1267} 1268 1269TSAN_INTERCEPTOR(int, __fxstat64, int version, int fd, void *buf) { 1270 SCOPED_TSAN_INTERCEPTOR(__fxstat64, version, fd, buf); 1271 if (fd > 0) 1272 FdAccess(thr, pc, fd); 1273 return REAL(__fxstat64)(version, fd, buf); 1274} 1275 1276TSAN_INTERCEPTOR(int, fstat64, int fd, void *buf) { 1277 SCOPED_TSAN_INTERCEPTOR(__fxstat64, 0, fd, buf); 1278 if (fd > 0) 1279 FdAccess(thr, pc, fd); 1280 return REAL(__fxstat64)(0, fd, buf); 1281} 1282 1283TSAN_INTERCEPTOR(int, open, const char *name, int flags, int mode) { 1284 SCOPED_TSAN_INTERCEPTOR(open, name, flags, mode); 1285 int fd = REAL(open)(name, flags, mode); 1286 if (fd >= 0) 1287 FdFileCreate(thr, pc, fd); 1288 return fd; 1289} 1290 1291TSAN_INTERCEPTOR(int, open64, const char *name, int flags, int mode) { 1292 SCOPED_TSAN_INTERCEPTOR(open64, name, flags, mode); 1293 int fd = REAL(open64)(name, flags, mode); 1294 if (fd >= 0) 1295 FdFileCreate(thr, pc, fd); 1296 return fd; 1297} 1298 1299TSAN_INTERCEPTOR(int, creat, const char *name, int mode) { 1300 SCOPED_TSAN_INTERCEPTOR(creat, name, mode); 1301 int fd = REAL(creat)(name, mode); 1302 if (fd >= 0) 1303 FdFileCreate(thr, pc, fd); 1304 return fd; 1305} 1306 1307TSAN_INTERCEPTOR(int, creat64, const char *name, int mode) { 1308 SCOPED_TSAN_INTERCEPTOR(creat64, name, mode); 1309 int fd = REAL(creat64)(name, mode); 1310 if (fd >= 0) 1311 FdFileCreate(thr, pc, fd); 1312 return fd; 1313} 1314 1315TSAN_INTERCEPTOR(int, dup, int oldfd) { 1316 SCOPED_TSAN_INTERCEPTOR(dup, oldfd); 1317 int newfd = REAL(dup)(oldfd); 1318 if (oldfd >= 0 && newfd >= 0 && newfd != oldfd) 1319 FdDup(thr, pc, oldfd, newfd); 1320 return newfd; 1321} 1322 1323TSAN_INTERCEPTOR(int, dup2, int oldfd, int newfd) { 1324 SCOPED_TSAN_INTERCEPTOR(dup2, oldfd, newfd); 1325 int newfd2 = REAL(dup2)(oldfd, newfd); 1326 if (oldfd >= 0 && newfd2 >= 0 && newfd2 != oldfd) 1327 FdDup(thr, pc, oldfd, newfd2); 1328 return newfd2; 1329} 1330 1331TSAN_INTERCEPTOR(int, dup3, int oldfd, int newfd, int flags) { 1332 SCOPED_TSAN_INTERCEPTOR(dup3, oldfd, newfd, flags); 1333 int newfd2 = REAL(dup3)(oldfd, newfd, flags); 1334 if (oldfd >= 0 && newfd2 >= 0 && newfd2 != oldfd) 1335 FdDup(thr, pc, oldfd, newfd2); 1336 return newfd2; 1337} 1338 1339TSAN_INTERCEPTOR(int, eventfd, unsigned initval, int flags) { 1340 SCOPED_TSAN_INTERCEPTOR(eventfd, initval, flags); 1341 int fd = REAL(eventfd)(initval, flags); 1342 if (fd >= 0) 1343 FdEventCreate(thr, pc, fd); 1344 return fd; 1345} 1346 1347TSAN_INTERCEPTOR(int, signalfd, int fd, void *mask, int flags) { 1348 SCOPED_TSAN_INTERCEPTOR(signalfd, fd, mask, flags); 1349 if (fd >= 0) 1350 FdClose(thr, pc, fd); 1351 fd = REAL(signalfd)(fd, mask, flags); 1352 if (fd >= 0) 1353 FdSignalCreate(thr, pc, fd); 1354 return fd; 1355} 1356 1357TSAN_INTERCEPTOR(int, inotify_init, int fake) { 1358 SCOPED_TSAN_INTERCEPTOR(inotify_init, fake); 1359 int fd = REAL(inotify_init)(fake); 1360 if (fd >= 0) 1361 FdInotifyCreate(thr, pc, fd); 1362 return fd; 1363} 1364 1365TSAN_INTERCEPTOR(int, inotify_init1, int flags) { 1366 SCOPED_TSAN_INTERCEPTOR(inotify_init1, flags); 1367 int fd = REAL(inotify_init1)(flags); 1368 if (fd >= 0) 1369 FdInotifyCreate(thr, pc, fd); 1370 return fd; 1371} 1372 1373TSAN_INTERCEPTOR(int, socket, int domain, int type, int protocol) { 1374 SCOPED_TSAN_INTERCEPTOR(socket, domain, type, protocol); 1375 int fd = REAL(socket)(domain, type, protocol); 1376 if (fd >= 0) 1377 FdSocketCreate(thr, pc, fd); 1378 return fd; 1379} 1380 1381TSAN_INTERCEPTOR(int, socketpair, int domain, int type, int protocol, int *fd) { 1382 SCOPED_TSAN_INTERCEPTOR(socketpair, domain, type, protocol, fd); 1383 int res = REAL(socketpair)(domain, type, protocol, fd); 1384 if (res == 0 && fd[0] >= 0 && fd[1] >= 0) 1385 FdPipeCreate(thr, pc, fd[0], fd[1]); 1386 return res; 1387} 1388 1389TSAN_INTERCEPTOR(int, connect, int fd, void *addr, unsigned addrlen) { 1390 SCOPED_TSAN_INTERCEPTOR(connect, fd, addr, addrlen); 1391 FdSocketConnecting(thr, pc, fd); 1392 int res = REAL(connect)(fd, addr, addrlen); 1393 if (res == 0 && fd >= 0) 1394 FdSocketConnect(thr, pc, fd); 1395 return res; 1396} 1397 1398TSAN_INTERCEPTOR(int, bind, int fd, void *addr, unsigned addrlen) { 1399 SCOPED_TSAN_INTERCEPTOR(bind, fd, addr, addrlen); 1400 int res = REAL(bind)(fd, addr, addrlen); 1401 if (fd > 0 && res == 0) 1402 FdAccess(thr, pc, fd); 1403 return res; 1404} 1405 1406TSAN_INTERCEPTOR(int, listen, int fd, int backlog) { 1407 SCOPED_TSAN_INTERCEPTOR(listen, fd, backlog); 1408 int res = REAL(listen)(fd, backlog); 1409 if (fd > 0 && res == 0) 1410 FdAccess(thr, pc, fd); 1411 return res; 1412} 1413 1414TSAN_INTERCEPTOR(int, epoll_create, int size) { 1415 SCOPED_TSAN_INTERCEPTOR(epoll_create, size); 1416 int fd = REAL(epoll_create)(size); 1417 if (fd >= 0) 1418 FdPollCreate(thr, pc, fd); 1419 return fd; 1420} 1421 1422TSAN_INTERCEPTOR(int, epoll_create1, int flags) { 1423 SCOPED_TSAN_INTERCEPTOR(epoll_create1, flags); 1424 int fd = REAL(epoll_create1)(flags); 1425 if (fd >= 0) 1426 FdPollCreate(thr, pc, fd); 1427 return fd; 1428} 1429 1430TSAN_INTERCEPTOR(int, close, int fd) { 1431 SCOPED_TSAN_INTERCEPTOR(close, fd); 1432 if (fd >= 0) 1433 FdClose(thr, pc, fd); 1434 return REAL(close)(fd); 1435} 1436 1437TSAN_INTERCEPTOR(int, __close, int fd) { 1438 SCOPED_TSAN_INTERCEPTOR(__close, fd); 1439 if (fd >= 0) 1440 FdClose(thr, pc, fd); 1441 return REAL(__close)(fd); 1442} 1443 1444// glibc guts 1445TSAN_INTERCEPTOR(void, __res_iclose, void *state, bool free_addr) { 1446 SCOPED_TSAN_INTERCEPTOR(__res_iclose, state, free_addr); 1447 int fds[64]; 1448 int cnt = ExtractResolvFDs(state, fds, ARRAY_SIZE(fds)); 1449 for (int i = 0; i < cnt; i++) { 1450 if (fds[i] > 0) 1451 FdClose(thr, pc, fds[i]); 1452 } 1453 REAL(__res_iclose)(state, free_addr); 1454} 1455 1456TSAN_INTERCEPTOR(int, pipe, int *pipefd) { 1457 SCOPED_TSAN_INTERCEPTOR(pipe, pipefd); 1458 int res = REAL(pipe)(pipefd); 1459 if (res == 0 && pipefd[0] >= 0 && pipefd[1] >= 0) 1460 FdPipeCreate(thr, pc, pipefd[0], pipefd[1]); 1461 return res; 1462} 1463 1464TSAN_INTERCEPTOR(int, pipe2, int *pipefd, int flags) { 1465 SCOPED_TSAN_INTERCEPTOR(pipe2, pipefd, flags); 1466 int res = REAL(pipe2)(pipefd, flags); 1467 if (res == 0 && pipefd[0] >= 0 && pipefd[1] >= 0) 1468 FdPipeCreate(thr, pc, pipefd[0], pipefd[1]); 1469 return res; 1470} 1471 1472TSAN_INTERCEPTOR(long_t, send, int fd, void *buf, long_t len, int flags) { 1473 SCOPED_TSAN_INTERCEPTOR(send, fd, buf, len, flags); 1474 if (fd >= 0) { 1475 FdAccess(thr, pc, fd); 1476 FdRelease(thr, pc, fd); 1477 } 1478 int res = REAL(send)(fd, buf, len, flags); 1479 return res; 1480} 1481 1482TSAN_INTERCEPTOR(long_t, sendmsg, int fd, void *msg, int flags) { 1483 SCOPED_TSAN_INTERCEPTOR(sendmsg, fd, msg, flags); 1484 if (fd >= 0) { 1485 FdAccess(thr, pc, fd); 1486 FdRelease(thr, pc, fd); 1487 } 1488 int res = REAL(sendmsg)(fd, msg, flags); 1489 return res; 1490} 1491 1492TSAN_INTERCEPTOR(long_t, recv, int fd, void *buf, long_t len, int flags) { 1493 SCOPED_TSAN_INTERCEPTOR(recv, fd, buf, len, flags); 1494 if (fd >= 0) 1495 FdAccess(thr, pc, fd); 1496 int res = REAL(recv)(fd, buf, len, flags); 1497 if (res >= 0 && fd >= 0) { 1498 FdAcquire(thr, pc, fd); 1499 } 1500 return res; 1501} 1502 1503TSAN_INTERCEPTOR(int, unlink, char *path) { 1504 SCOPED_TSAN_INTERCEPTOR(unlink, path); 1505 Release(thr, pc, File2addr(path)); 1506 int res = REAL(unlink)(path); 1507 return res; 1508} 1509 1510TSAN_INTERCEPTOR(void*, fopen, char *path, char *mode) { 1511 SCOPED_TSAN_INTERCEPTOR(fopen, path, mode); 1512 void *res = REAL(fopen)(path, mode); 1513 Acquire(thr, pc, File2addr(path)); 1514 if (res) { 1515 int fd = fileno_unlocked(res); 1516 if (fd >= 0) 1517 FdFileCreate(thr, pc, fd); 1518 } 1519 return res; 1520} 1521 1522TSAN_INTERCEPTOR(void*, freopen, char *path, char *mode, void *stream) { 1523 SCOPED_TSAN_INTERCEPTOR(freopen, path, mode, stream); 1524 if (stream) { 1525 int fd = fileno_unlocked(stream); 1526 if (fd >= 0) 1527 FdClose(thr, pc, fd); 1528 } 1529 void *res = REAL(freopen)(path, mode, stream); 1530 Acquire(thr, pc, File2addr(path)); 1531 if (res) { 1532 int fd = fileno_unlocked(res); 1533 if (fd >= 0) 1534 FdFileCreate(thr, pc, fd); 1535 } 1536 return res; 1537} 1538 1539TSAN_INTERCEPTOR(int, fclose, void *stream) { 1540 { 1541 SCOPED_TSAN_INTERCEPTOR(fclose, stream); 1542 if (stream) { 1543 int fd = fileno_unlocked(stream); 1544 if (fd >= 0) 1545 FdClose(thr, pc, fd); 1546 } 1547 } 1548 return REAL(fclose)(stream); 1549} 1550 1551TSAN_INTERCEPTOR(uptr, fread, void *ptr, uptr size, uptr nmemb, void *f) { 1552 { 1553 SCOPED_TSAN_INTERCEPTOR(fread, ptr, size, nmemb, f); 1554 MemoryAccessRange(thr, pc, (uptr)ptr, size * nmemb, true); 1555 } 1556 return REAL(fread)(ptr, size, nmemb, f); 1557} 1558 1559TSAN_INTERCEPTOR(uptr, fwrite, const void *p, uptr size, uptr nmemb, void *f) { 1560 { 1561 SCOPED_TSAN_INTERCEPTOR(fwrite, p, size, nmemb, f); 1562 MemoryAccessRange(thr, pc, (uptr)p, size * nmemb, false); 1563 } 1564 return REAL(fwrite)(p, size, nmemb, f); 1565} 1566 1567TSAN_INTERCEPTOR(int, fflush, void *stream) { 1568 SCOPED_TSAN_INTERCEPTOR(fflush, stream); 1569 return REAL(fflush)(stream); 1570} 1571 1572TSAN_INTERCEPTOR(void, abort, int fake) { 1573 SCOPED_TSAN_INTERCEPTOR(abort, fake); 1574 REAL(fflush)(0); 1575 REAL(abort)(fake); 1576} 1577 1578TSAN_INTERCEPTOR(int, puts, const char *s) { 1579 SCOPED_TSAN_INTERCEPTOR(puts, s); 1580 MemoryAccessRange(thr, pc, (uptr)s, internal_strlen(s), false); 1581 return REAL(puts)(s); 1582} 1583 1584TSAN_INTERCEPTOR(int, rmdir, char *path) { 1585 SCOPED_TSAN_INTERCEPTOR(rmdir, path); 1586 Release(thr, pc, Dir2addr(path)); 1587 int res = REAL(rmdir)(path); 1588 return res; 1589} 1590 1591TSAN_INTERCEPTOR(void*, opendir, char *path) { 1592 SCOPED_TSAN_INTERCEPTOR(opendir, path); 1593 void *res = REAL(opendir)(path); 1594 if (res != 0) 1595 Acquire(thr, pc, Dir2addr(path)); 1596 return res; 1597} 1598 1599TSAN_INTERCEPTOR(int, epoll_ctl, int epfd, int op, int fd, void *ev) { 1600 SCOPED_TSAN_INTERCEPTOR(epoll_ctl, epfd, op, fd, ev); 1601 if (epfd >= 0) 1602 FdAccess(thr, pc, epfd); 1603 if (epfd >= 0 && fd >= 0) 1604 FdAccess(thr, pc, fd); 1605 if (op == EPOLL_CTL_ADD && epfd >= 0) 1606 FdRelease(thr, pc, epfd); 1607 int res = REAL(epoll_ctl)(epfd, op, fd, ev); 1608 return res; 1609} 1610 1611TSAN_INTERCEPTOR(int, epoll_wait, int epfd, void *ev, int cnt, int timeout) { 1612 SCOPED_TSAN_INTERCEPTOR(epoll_wait, epfd, ev, cnt, timeout); 1613 if (epfd >= 0) 1614 FdAccess(thr, pc, epfd); 1615 int res = BLOCK_REAL(epoll_wait)(epfd, ev, cnt, timeout); 1616 if (res > 0 && epfd >= 0) 1617 FdAcquire(thr, pc, epfd); 1618 return res; 1619} 1620 1621void ALWAYS_INLINE rtl_generic_sighandler(bool sigact, int sig, 1622 my_siginfo_t *info, void *ctx) { 1623 ThreadState *thr = cur_thread(); 1624 SignalContext *sctx = SigCtx(thr); 1625 // Don't mess with synchronous signals. 1626 if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL || 1627 sig == SIGABRT || sig == SIGFPE || sig == SIGPIPE || sig == SIGSYS || 1628 // If we are sending signal to ourselves, we must process it now. 1629 (sctx && sig == sctx->int_signal_send) || 1630 // If we are in blocking function, we can safely process it now 1631 // (but check if we are in a recursive interceptor, 1632 // i.e. pthread_join()->munmap()). 1633 (sctx && sctx->in_blocking_func == 1 && thr->in_rtl == 1)) { 1634 int in_rtl = thr->in_rtl; 1635 thr->in_rtl = 0; 1636 CHECK_EQ(thr->in_signal_handler, false); 1637 thr->in_signal_handler = true; 1638 if (sigact) 1639 sigactions[sig].sa_sigaction(sig, info, ctx); 1640 else 1641 sigactions[sig].sa_handler(sig); 1642 CHECK_EQ(thr->in_signal_handler, true); 1643 thr->in_signal_handler = false; 1644 thr->in_rtl = in_rtl; 1645 return; 1646 } 1647 1648 if (sctx == 0) 1649 return; 1650 SignalDesc *signal = &sctx->pending_signals[sig]; 1651 if (signal->armed == false) { 1652 signal->armed = true; 1653 signal->sigaction = sigact; 1654 if (info) 1655 internal_memcpy(&signal->siginfo, info, sizeof(*info)); 1656 if (ctx) 1657 internal_memcpy(&signal->ctx, ctx, sizeof(signal->ctx)); 1658 sctx->pending_signal_count++; 1659 } 1660} 1661 1662static void rtl_sighandler(int sig) { 1663 rtl_generic_sighandler(false, sig, 0, 0); 1664} 1665 1666static void rtl_sigaction(int sig, my_siginfo_t *info, void *ctx) { 1667 rtl_generic_sighandler(true, sig, info, ctx); 1668} 1669 1670TSAN_INTERCEPTOR(int, sigaction, int sig, sigaction_t *act, sigaction_t *old) { 1671 SCOPED_TSAN_INTERCEPTOR(sigaction, sig, act, old); 1672 if (old) 1673 internal_memcpy(old, &sigactions[sig], sizeof(*old)); 1674 if (act == 0) 1675 return 0; 1676 internal_memcpy(&sigactions[sig], act, sizeof(*act)); 1677 sigaction_t newact; 1678 internal_memcpy(&newact, act, sizeof(newact)); 1679 REAL(sigfillset)(&newact.sa_mask); 1680 if (act->sa_handler != SIG_IGN && act->sa_handler != SIG_DFL) { 1681 if (newact.sa_flags & SA_SIGINFO) 1682 newact.sa_sigaction = rtl_sigaction; 1683 else 1684 newact.sa_handler = rtl_sighandler; 1685 } 1686 int res = REAL(sigaction)(sig, &newact, 0); 1687 return res; 1688} 1689 1690TSAN_INTERCEPTOR(sighandler_t, signal, int sig, sighandler_t h) { 1691 sigaction_t act; 1692 act.sa_handler = h; 1693 REAL(memset)(&act.sa_mask, -1, sizeof(act.sa_mask)); 1694 act.sa_flags = 0; 1695 sigaction_t old; 1696 int res = sigaction(sig, &act, &old); 1697 if (res) 1698 return SIG_ERR; 1699 return old.sa_handler; 1700} 1701 1702TSAN_INTERCEPTOR(int, sigsuspend, const __sanitizer_sigset_t *mask) { 1703 SCOPED_TSAN_INTERCEPTOR(sigsuspend, mask); 1704 return REAL(sigsuspend)(mask); 1705} 1706 1707TSAN_INTERCEPTOR(int, raise, int sig) { 1708 SCOPED_TSAN_INTERCEPTOR(raise, sig); 1709 SignalContext *sctx = SigCtx(thr); 1710 CHECK_NE(sctx, 0); 1711 int prev = sctx->int_signal_send; 1712 sctx->int_signal_send = sig; 1713 int res = REAL(raise)(sig); 1714 CHECK_EQ(sctx->int_signal_send, sig); 1715 sctx->int_signal_send = prev; 1716 return res; 1717} 1718 1719TSAN_INTERCEPTOR(int, kill, int pid, int sig) { 1720 SCOPED_TSAN_INTERCEPTOR(kill, pid, sig); 1721 SignalContext *sctx = SigCtx(thr); 1722 CHECK_NE(sctx, 0); 1723 int prev = sctx->int_signal_send; 1724 if (pid == (int)internal_getpid()) { 1725 sctx->int_signal_send = sig; 1726 } 1727 int res = REAL(kill)(pid, sig); 1728 if (pid == (int)internal_getpid()) { 1729 CHECK_EQ(sctx->int_signal_send, sig); 1730 sctx->int_signal_send = prev; 1731 } 1732 return res; 1733} 1734 1735TSAN_INTERCEPTOR(int, pthread_kill, void *tid, int sig) { 1736 SCOPED_TSAN_INTERCEPTOR(pthread_kill, tid, sig); 1737 SignalContext *sctx = SigCtx(thr); 1738 CHECK_NE(sctx, 0); 1739 int prev = sctx->int_signal_send; 1740 if (tid == pthread_self()) { 1741 sctx->int_signal_send = sig; 1742 } 1743 int res = REAL(pthread_kill)(tid, sig); 1744 if (tid == pthread_self()) { 1745 CHECK_EQ(sctx->int_signal_send, sig); 1746 sctx->int_signal_send = prev; 1747 } 1748 return res; 1749} 1750 1751TSAN_INTERCEPTOR(int, gettimeofday, void *tv, void *tz) { 1752 SCOPED_TSAN_INTERCEPTOR(gettimeofday, tv, tz); 1753 // It's intercepted merely to process pending signals. 1754 return REAL(gettimeofday)(tv, tz); 1755} 1756 1757TSAN_INTERCEPTOR(int, getaddrinfo, void *node, void *service, 1758 void *hints, void *rv) { 1759 SCOPED_TSAN_INTERCEPTOR(getaddrinfo, node, service, hints, rv); 1760 // We miss atomic synchronization in getaddrinfo, 1761 // and can report false race between malloc and free 1762 // inside of getaddrinfo. So ignore memory accesses. 1763 ThreadIgnoreBegin(thr); 1764 // getaddrinfo calls fopen, which can be intercepted by user. 1765 thr->in_rtl--; 1766 CHECK_EQ(thr->in_rtl, 0); 1767 int res = REAL(getaddrinfo)(node, service, hints, rv); 1768 thr->in_rtl++; 1769 ThreadIgnoreEnd(thr); 1770 return res; 1771} 1772 1773// Linux kernel has a bug that leads to kernel deadlock if a process 1774// maps TBs of memory and then calls mlock(). 1775static void MlockIsUnsupported() { 1776 static atomic_uint8_t printed; 1777 if (atomic_exchange(&printed, 1, memory_order_relaxed)) 1778 return; 1779 if (flags()->verbosity > 0) 1780 Printf("INFO: ThreadSanitizer ignores mlock/mlockall/munlock/munlockall\n"); 1781} 1782 1783TSAN_INTERCEPTOR(int, mlock, const void *addr, uptr len) { 1784 MlockIsUnsupported(); 1785 return 0; 1786} 1787 1788TSAN_INTERCEPTOR(int, munlock, const void *addr, uptr len) { 1789 MlockIsUnsupported(); 1790 return 0; 1791} 1792 1793TSAN_INTERCEPTOR(int, mlockall, int flags) { 1794 MlockIsUnsupported(); 1795 return 0; 1796} 1797 1798TSAN_INTERCEPTOR(int, munlockall, void) { 1799 MlockIsUnsupported(); 1800 return 0; 1801} 1802 1803TSAN_INTERCEPTOR(int, fork, int fake) { 1804 SCOPED_INTERCEPTOR_RAW(fork, fake); 1805 int pid = REAL(fork)(fake); 1806 if (pid == 0) { 1807 // child 1808 FdOnFork(thr, pc); 1809 } else if (pid > 0) { 1810 // parent 1811 } 1812 return pid; 1813} 1814 1815static int OnExit(ThreadState *thr) { 1816 int status = Finalize(thr); 1817 REAL(fflush)(0); 1818 return status; 1819} 1820 1821struct TsanInterceptorContext { 1822 ThreadState *thr; 1823 const uptr caller_pc; 1824 const uptr pc; 1825}; 1826 1827#include "sanitizer_common/sanitizer_platform_interceptors.h" 1828// Causes interceptor recursion (getpwuid_r() calls fopen()) 1829#undef SANITIZER_INTERCEPT_GETPWNAM_AND_FRIENDS 1830#undef SANITIZER_INTERCEPT_GETPWNAM_R_AND_FRIENDS 1831// Causes interceptor recursion (getaddrinfo() and fopen()) 1832#undef SANITIZER_INTERCEPT_GETADDRINFO 1833#undef SANITIZER_INTERCEPT_GETNAMEINFO 1834// Causes interceptor recursion (glob64() calls lstat64()) 1835#undef SANITIZER_INTERCEPT_GLOB 1836 1837#define COMMON_INTERCEPTOR_UNPOISON_PARAM(ctx, count) \ 1838 do { \ 1839 } while (false) 1840 1841#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \ 1842 MemoryAccessRange(((TsanInterceptorContext *)ctx)->thr, \ 1843 ((TsanInterceptorContext *)ctx)->pc, (uptr)ptr, size, \ 1844 true) 1845 1846#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) \ 1847 MemoryAccessRange(((TsanInterceptorContext *) ctx)->thr, \ 1848 ((TsanInterceptorContext *) ctx)->pc, (uptr) ptr, size, \ 1849 false) 1850 1851#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \ 1852 SCOPED_TSAN_INTERCEPTOR(func, __VA_ARGS__); \ 1853 TsanInterceptorContext _ctx = {thr, caller_pc, pc}; \ 1854 ctx = (void *)&_ctx; \ 1855 (void) ctx; 1856 1857#define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \ 1858 FdAcquire(((TsanInterceptorContext *) ctx)->thr, pc, fd) 1859 1860#define COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd) \ 1861 FdRelease(((TsanInterceptorContext *) ctx)->thr, pc, fd) 1862 1863#define COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd) \ 1864 FdAccess(((TsanInterceptorContext *) ctx)->thr, pc, fd) 1865 1866#define COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, newfd) \ 1867 FdSocketAccept(((TsanInterceptorContext *) ctx)->thr, pc, fd, newfd) 1868 1869#define COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, name) \ 1870 ThreadSetName(((TsanInterceptorContext *) ctx)->thr, name) 1871 1872#define COMMON_INTERCEPTOR_SET_PTHREAD_NAME(ctx, thread, name) \ 1873 CTX()->thread_registry->SetThreadNameByUserId(thread, name) 1874 1875#define COMMON_INTERCEPTOR_BLOCK_REAL(name) BLOCK_REAL(name) 1876 1877#define COMMON_INTERCEPTOR_ON_EXIT(ctx) \ 1878 OnExit(((TsanInterceptorContext *) ctx)->thr) 1879 1880#define COMMON_INTERCEPTOR_MUTEX_LOCK(ctx, m) \ 1881 MutexLock(((TsanInterceptorContext *)ctx)->thr, \ 1882 ((TsanInterceptorContext *)ctx)->pc, (uptr)m) 1883 1884#define COMMON_INTERCEPTOR_MUTEX_UNLOCK(ctx, m) \ 1885 MutexUnlock(((TsanInterceptorContext *)ctx)->thr, \ 1886 ((TsanInterceptorContext *)ctx)->pc, (uptr)m) 1887 1888#include "sanitizer_common/sanitizer_common_interceptors.inc" 1889 1890#define TSAN_SYSCALL() \ 1891 ThreadState *thr = cur_thread(); \ 1892 ScopedSyscall scoped_syscall(thr) \ 1893/**/ 1894 1895struct ScopedSyscall { 1896 ThreadState *thr; 1897 1898 explicit ScopedSyscall(ThreadState *thr) 1899 : thr(thr) { 1900 if (thr->in_rtl == 0) 1901 Initialize(thr); 1902 thr->in_rtl++; 1903 } 1904 1905 ~ScopedSyscall() { 1906 thr->in_rtl--; 1907 if (thr->in_rtl == 0) 1908 ProcessPendingSignals(thr); 1909 } 1910}; 1911 1912static void syscall_access_range(uptr pc, uptr p, uptr s, bool write) { 1913 TSAN_SYSCALL(); 1914 MemoryAccessRange(thr, pc, p, s, write); 1915} 1916 1917static void syscall_fd_close(uptr pc, int fd) { 1918 TSAN_SYSCALL(); 1919 if (fd >= 0) 1920 FdClose(thr, pc, fd); 1921} 1922 1923static void syscall_pre_fork(uptr pc) { 1924 TSAN_SYSCALL(); 1925} 1926 1927static void syscall_post_fork(uptr pc, int res) { 1928 TSAN_SYSCALL(); 1929 if (res == 0) { 1930 // child 1931 FdOnFork(thr, pc); 1932 } else if (res > 0) { 1933 // parent 1934 } 1935} 1936 1937#define COMMON_SYSCALL_PRE_READ_RANGE(p, s) \ 1938 syscall_access_range(GET_CALLER_PC(), (uptr)(p), (uptr)(s), false) 1939#define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s) \ 1940 syscall_access_range(GET_CALLER_PC(), (uptr)(p), (uptr)(s), true) 1941#define COMMON_SYSCALL_POST_READ_RANGE(p, s) \ 1942 do { } while (false) 1943#define COMMON_SYSCALL_POST_WRITE_RANGE(p, s) \ 1944 do { } while (false) 1945#define COMMON_SYSCALL_FD_CLOSE(fd) \ 1946 syscall_fd_close(GET_CALLER_PC(), fd) 1947#define COMMON_SYSCALL_PRE_FORK() \ 1948 syscall_pre_fork(GET_CALLER_PC()) 1949#define COMMON_SYSCALL_POST_FORK(res) \ 1950 syscall_post_fork(GET_CALLER_PC(), res) 1951#include "sanitizer_common/sanitizer_common_syscalls.inc" 1952 1953namespace __tsan { 1954 1955static void finalize(void *arg) { 1956 ThreadState *thr = cur_thread(); 1957 uptr pc = 0; 1958 atexit_ctx->exit(thr, pc); 1959 int status = Finalize(thr); 1960 REAL(fflush)(0); 1961 if (status) 1962 REAL(_exit)(status); 1963} 1964 1965void ProcessPendingSignals(ThreadState *thr) { 1966 CHECK_EQ(thr->in_rtl, 0); 1967 SignalContext *sctx = SigCtx(thr); 1968 if (sctx == 0 || sctx->pending_signal_count == 0 || thr->in_signal_handler) 1969 return; 1970 Context *ctx = CTX(); 1971 thr->in_signal_handler = true; 1972 sctx->pending_signal_count = 0; 1973 // These are too big for stack. 1974 static THREADLOCAL __sanitizer_sigset_t emptyset, oldset; 1975 REAL(sigfillset)(&emptyset); 1976 pthread_sigmask(SIG_SETMASK, &emptyset, &oldset); 1977 for (int sig = 0; sig < kSigCount; sig++) { 1978 SignalDesc *signal = &sctx->pending_signals[sig]; 1979 if (signal->armed) { 1980 signal->armed = false; 1981 if (sigactions[sig].sa_handler != SIG_DFL 1982 && sigactions[sig].sa_handler != SIG_IGN) { 1983 // Insure that the handler does not spoil errno. 1984 const int saved_errno = errno; 1985 errno = 0; 1986 if (signal->sigaction) 1987 sigactions[sig].sa_sigaction(sig, &signal->siginfo, &signal->ctx); 1988 else 1989 sigactions[sig].sa_handler(sig); 1990 if (flags()->report_bugs && errno != 0) { 1991 ScopedInRtl in_rtl; 1992 __tsan::StackTrace stack; 1993 uptr pc = signal->sigaction ? 1994 (uptr)sigactions[sig].sa_sigaction : 1995 (uptr)sigactions[sig].sa_handler; 1996 pc += 1; // return address is expected, OutputReport() will undo this 1997 stack.Init(&pc, 1); 1998 ThreadRegistryLock l(ctx->thread_registry); 1999 ScopedReport rep(ReportTypeErrnoInSignal); 2000 if (!IsFiredSuppression(ctx, rep, stack)) { 2001 rep.AddStack(&stack); 2002 OutputReport(ctx, rep, rep.GetReport()->stacks[0]); 2003 } 2004 } 2005 errno = saved_errno; 2006 } 2007 } 2008 } 2009 pthread_sigmask(SIG_SETMASK, &oldset, 0); 2010 CHECK_EQ(thr->in_signal_handler, true); 2011 thr->in_signal_handler = false; 2012} 2013 2014static void unreachable() { 2015 Printf("FATAL: ThreadSanitizer: unreachable called\n"); 2016 Die(); 2017} 2018 2019void InitializeInterceptors() { 2020 CHECK_GT(cur_thread()->in_rtl, 0); 2021 2022 // We need to setup it early, because functions like dlsym() can call it. 2023 REAL(memset) = internal_memset; 2024 REAL(memcpy) = internal_memcpy; 2025 REAL(memcmp) = internal_memcmp; 2026 2027 // Instruct libc malloc to consume less memory. 2028 mallopt(1, 0); // M_MXFAST 2029 mallopt(-3, 32*1024); // M_MMAP_THRESHOLD 2030 2031 SANITIZER_COMMON_INTERCEPTORS_INIT; 2032 2033 TSAN_INTERCEPT(setjmp); 2034 TSAN_INTERCEPT(_setjmp); 2035 TSAN_INTERCEPT(sigsetjmp); 2036 TSAN_INTERCEPT(__sigsetjmp); 2037 TSAN_INTERCEPT(longjmp); 2038 TSAN_INTERCEPT(siglongjmp); 2039 2040 TSAN_INTERCEPT(malloc); 2041 TSAN_INTERCEPT(__libc_memalign); 2042 TSAN_INTERCEPT(calloc); 2043 TSAN_INTERCEPT(realloc); 2044 TSAN_INTERCEPT(free); 2045 TSAN_INTERCEPT(cfree); 2046 TSAN_INTERCEPT(mmap); 2047 TSAN_INTERCEPT(mmap64); 2048 TSAN_INTERCEPT(munmap); 2049 TSAN_INTERCEPT(memalign); 2050 TSAN_INTERCEPT(valloc); 2051 TSAN_INTERCEPT(pvalloc); 2052 TSAN_INTERCEPT(posix_memalign); 2053 2054 TSAN_INTERCEPT(strlen); 2055 TSAN_INTERCEPT(memset); 2056 TSAN_INTERCEPT(memcpy); 2057 TSAN_INTERCEPT(memchr); 2058 TSAN_INTERCEPT(memrchr); 2059 TSAN_INTERCEPT(memmove); 2060 TSAN_INTERCEPT(memcmp); 2061 TSAN_INTERCEPT(strchr); 2062 TSAN_INTERCEPT(strchrnul); 2063 TSAN_INTERCEPT(strrchr); 2064 TSAN_INTERCEPT(strcpy); // NOLINT 2065 TSAN_INTERCEPT(strncpy); 2066 TSAN_INTERCEPT(strstr); 2067 TSAN_INTERCEPT(strdup); 2068 2069 TSAN_INTERCEPT(pthread_create); 2070 TSAN_INTERCEPT(pthread_join); 2071 TSAN_INTERCEPT(pthread_detach); 2072 2073 TSAN_INTERCEPT(pthread_mutex_init); 2074 TSAN_INTERCEPT(pthread_mutex_destroy); 2075 TSAN_INTERCEPT(pthread_mutex_trylock); 2076 TSAN_INTERCEPT(pthread_mutex_timedlock); 2077 2078 TSAN_INTERCEPT(pthread_spin_init); 2079 TSAN_INTERCEPT(pthread_spin_destroy); 2080 TSAN_INTERCEPT(pthread_spin_lock); 2081 TSAN_INTERCEPT(pthread_spin_trylock); 2082 TSAN_INTERCEPT(pthread_spin_unlock); 2083 2084 TSAN_INTERCEPT(pthread_rwlock_init); 2085 TSAN_INTERCEPT(pthread_rwlock_destroy); 2086 TSAN_INTERCEPT(pthread_rwlock_rdlock); 2087 TSAN_INTERCEPT(pthread_rwlock_tryrdlock); 2088 TSAN_INTERCEPT(pthread_rwlock_timedrdlock); 2089 TSAN_INTERCEPT(pthread_rwlock_wrlock); 2090 TSAN_INTERCEPT(pthread_rwlock_trywrlock); 2091 TSAN_INTERCEPT(pthread_rwlock_timedwrlock); 2092 TSAN_INTERCEPT(pthread_rwlock_unlock); 2093 2094 INTERCEPT_FUNCTION_VER(pthread_cond_destroy, GLIBC_2.3.2); 2095 INTERCEPT_FUNCTION_VER(pthread_cond_timedwait, GLIBC_2.3.2); 2096 2097 TSAN_INTERCEPT(pthread_barrier_init); 2098 TSAN_INTERCEPT(pthread_barrier_destroy); 2099 TSAN_INTERCEPT(pthread_barrier_wait); 2100 2101 TSAN_INTERCEPT(pthread_once); 2102 2103 TSAN_INTERCEPT(sem_init); 2104 TSAN_INTERCEPT(sem_destroy); 2105 TSAN_INTERCEPT(sem_wait); 2106 TSAN_INTERCEPT(sem_trywait); 2107 TSAN_INTERCEPT(sem_timedwait); 2108 TSAN_INTERCEPT(sem_post); 2109 TSAN_INTERCEPT(sem_getvalue); 2110 2111 TSAN_INTERCEPT(stat); 2112 TSAN_INTERCEPT(__xstat); 2113 TSAN_INTERCEPT(stat64); 2114 TSAN_INTERCEPT(__xstat64); 2115 TSAN_INTERCEPT(lstat); 2116 TSAN_INTERCEPT(__lxstat); 2117 TSAN_INTERCEPT(lstat64); 2118 TSAN_INTERCEPT(__lxstat64); 2119 TSAN_INTERCEPT(fstat); 2120 TSAN_INTERCEPT(__fxstat); 2121 TSAN_INTERCEPT(fstat64); 2122 TSAN_INTERCEPT(__fxstat64); 2123 TSAN_INTERCEPT(open); 2124 TSAN_INTERCEPT(open64); 2125 TSAN_INTERCEPT(creat); 2126 TSAN_INTERCEPT(creat64); 2127 TSAN_INTERCEPT(dup); 2128 TSAN_INTERCEPT(dup2); 2129 TSAN_INTERCEPT(dup3); 2130 TSAN_INTERCEPT(eventfd); 2131 TSAN_INTERCEPT(signalfd); 2132 TSAN_INTERCEPT(inotify_init); 2133 TSAN_INTERCEPT(inotify_init1); 2134 TSAN_INTERCEPT(socket); 2135 TSAN_INTERCEPT(socketpair); 2136 TSAN_INTERCEPT(connect); 2137 TSAN_INTERCEPT(bind); 2138 TSAN_INTERCEPT(listen); 2139 TSAN_INTERCEPT(epoll_create); 2140 TSAN_INTERCEPT(epoll_create1); 2141 TSAN_INTERCEPT(close); 2142 TSAN_INTERCEPT(__close); 2143 TSAN_INTERCEPT(__res_iclose); 2144 TSAN_INTERCEPT(pipe); 2145 TSAN_INTERCEPT(pipe2); 2146 2147 TSAN_INTERCEPT(send); 2148 TSAN_INTERCEPT(sendmsg); 2149 TSAN_INTERCEPT(recv); 2150 2151 TSAN_INTERCEPT(unlink); 2152 TSAN_INTERCEPT(fopen); 2153 TSAN_INTERCEPT(freopen); 2154 TSAN_INTERCEPT(fclose); 2155 TSAN_INTERCEPT(fread); 2156 TSAN_INTERCEPT(fwrite); 2157 TSAN_INTERCEPT(fflush); 2158 TSAN_INTERCEPT(abort); 2159 TSAN_INTERCEPT(puts); 2160 TSAN_INTERCEPT(rmdir); 2161 TSAN_INTERCEPT(opendir); 2162 2163 TSAN_INTERCEPT(epoll_ctl); 2164 TSAN_INTERCEPT(epoll_wait); 2165 2166 TSAN_INTERCEPT(sigaction); 2167 TSAN_INTERCEPT(signal); 2168 TSAN_INTERCEPT(sigsuspend); 2169 TSAN_INTERCEPT(raise); 2170 TSAN_INTERCEPT(kill); 2171 TSAN_INTERCEPT(pthread_kill); 2172 TSAN_INTERCEPT(sleep); 2173 TSAN_INTERCEPT(usleep); 2174 TSAN_INTERCEPT(nanosleep); 2175 TSAN_INTERCEPT(gettimeofday); 2176 TSAN_INTERCEPT(getaddrinfo); 2177 2178 TSAN_INTERCEPT(mlock); 2179 TSAN_INTERCEPT(munlock); 2180 TSAN_INTERCEPT(mlockall); 2181 TSAN_INTERCEPT(munlockall); 2182 2183 TSAN_INTERCEPT(fork); 2184 TSAN_INTERCEPT(dlopen); 2185 TSAN_INTERCEPT(dlclose); 2186 TSAN_INTERCEPT(on_exit); 2187 TSAN_INTERCEPT(__cxa_atexit); 2188 TSAN_INTERCEPT(_exit); 2189 2190 // Need to setup it, because interceptors check that the function is resolved. 2191 // But atexit is emitted directly into the module, so can't be resolved. 2192 REAL(atexit) = (int(*)(void(*)()))unreachable; 2193 atexit_ctx = new(internal_alloc(MBlockAtExit, sizeof(AtExitContext))) 2194 AtExitContext(); 2195 2196 if (REAL(__cxa_atexit)(&finalize, 0, 0)) { 2197 Printf("ThreadSanitizer: failed to setup atexit callback\n"); 2198 Die(); 2199 } 2200 2201 if (pthread_key_create(&g_thread_finalize_key, &thread_finalize)) { 2202 Printf("ThreadSanitizer: failed to create thread key\n"); 2203 Die(); 2204 } 2205 2206 FdInit(); 2207} 2208 2209void internal_start_thread(void(*func)(void *arg), void *arg) { 2210 // Start the thread with signals blocked, otherwise it can steal users 2211 // signals. 2212 __sanitizer_kernel_sigset_t set, old; 2213 internal_sigfillset(&set); 2214 internal_sigprocmask(SIG_SETMASK, &set, &old); 2215 void *th; 2216 REAL(pthread_create)(&th, 0, (void*(*)(void *arg))func, arg); 2217 REAL(pthread_detach)(th); 2218 internal_sigprocmask(SIG_SETMASK, &old, 0); 2219} 2220 2221} // namespace __tsan 2222