lib/lsan/lsan.cc

   1 //=-- lsan.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 LeakSanitizer.
  11 // Standalone LSan RTL.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "lsan.h"
  16
  17 #include "sanitizer_common/sanitizer_flags.h"
  18 #include "sanitizer_common/sanitizer_stacktrace.h"
  19 #include "lsan_allocator.h"
  20 #include "lsan_common.h"
  21 #include "lsan_thread.h"
  22
  23 bool lsan_inited;
  24 bool lsan_init_is_running;
  25
  26 namespace __lsan {
  27
  28 static void InitializeCommonFlags() {
  29   CommonFlags *cf = common_flags();
  30   SetCommonFlagsDefaults(cf);
  31   cf->external_symbolizer_path = GetEnv("LSAN_SYMBOLIZER_PATH");
  32   cf->malloc_context_size = 30;
  33   cf->detect_leaks = true;
  34
  35   ParseCommonFlagsFromString(cf, GetEnv("LSAN_OPTIONS"));
  36 }
  37
  38 ///// Interface to the common LSan module. /////
  39 bool WordIsPoisoned(uptr addr) {
  40   return false;
  41 }
  42
  43 }  // namespace __lsan
  44
  45 using namespace __lsan;  // NOLINT
  46
  47 extern "C" void __lsan_init() {
  48   CHECK(!lsan_init_is_running);
  49   if (lsan_inited)
  50     return;
  51   lsan_init_is_running = true;
  52   SanitizerToolName = "LeakSanitizer";
  53   InitializeCommonFlags();
  54   InitializeAllocator();
  55   InitTlsSize();
  56   InitializeInterceptors();
  57   InitializeThreadRegistry();
  58   u32 tid = ThreadCreate(0, 0, true);
  59   CHECK_EQ(tid, 0);
  60   ThreadStart(tid, GetTid());
  61   SetCurrentThread(tid);
  62
  63   Symbolizer::Init(common_flags()->external_symbolizer_path);
  64
  65   InitCommonLsan();
  66   if (common_flags()->detect_leaks && common_flags()->leak_check_at_exit)
  67     Atexit(DoLeakCheck);
  68   lsan_inited = true;
  69   lsan_init_is_running = false;
  70 }
  71