libsanitizer/asan/asan_posix.cc

   1 //===-- asan_posix.cc -----------------------------------------------------===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // This file is a part of AddressSanitizer, an address sanity checker.
   9 //
  10 // Posix-specific details.
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "sanitizer_common/sanitizer_platform.h"
  14 #if SANITIZER_POSIX
  15
  16 #include "asan_internal.h"
  17 #include "asan_interceptors.h"
  18 #include "asan_mapping.h"
  19 #include "asan_report.h"
  20 #include "asan_stack.h"
  21 #include "sanitizer_common/sanitizer_libc.h"
  22 #include "sanitizer_common/sanitizer_posix.h"
  23 #include "sanitizer_common/sanitizer_procmaps.h"
  24
  25 #include <pthread.h>
  26 #include <signal.h>
  27 #include <stdlib.h>
  28 #include <sys/time.h>
  29 #include <sys/resource.h>
  30 #include <unistd.h>
  31
  32 namespace __asan {
  33
  34 void AsanOnDeadlySignal(int signo, void *siginfo, void *context) {
  35   StartReportDeadlySignal();
  36   SignalContext sig(siginfo, context);
  37   ReportDeadlySignal(sig);
  38 }
  39
  40 // ---------------------- TSD ---------------- {{{1
  41
  42 static pthread_key_t tsd_key;
  43 static bool tsd_key_inited = false;
  44 void AsanTSDInit(void (*destructor)(void *tsd)) {
  45   CHECK(!tsd_key_inited);
  46   tsd_key_inited = true;
  47   CHECK_EQ(0, pthread_key_create(&tsd_key, destructor));
  48 }
  49
  50 void *AsanTSDGet() {
  51   CHECK(tsd_key_inited);
  52   return pthread_getspecific(tsd_key);
  53 }
  54
  55 void AsanTSDSet(void *tsd) {
  56   CHECK(tsd_key_inited);
  57   pthread_setspecific(tsd_key, tsd);
  58 }
  59
  60 void PlatformTSDDtor(void *tsd) {
  61   AsanThreadContext *context = (AsanThreadContext*)tsd;
  62   if (context->destructor_iterations > 1) {
  63     context->destructor_iterations--;
  64     CHECK_EQ(0, pthread_setspecific(tsd_key, tsd));
  65     return;
  66   }
  67   AsanThread::TSDDtor(tsd);
  68 }
  69 }  // namespace __asan
  70
  71 #endif  // SANITIZER_POSIX