src/compiler-rt/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_flag_parser.h"
  19 #include "sanitizer_common/sanitizer_stacktrace.h"
  20 #include "lsan_allocator.h"
  21 #include "lsan_common.h"
  22 #include "lsan_thread.h"
  23
  24 bool lsan_inited;
  25 bool lsan_init_is_running;
  26
  27 namespace __lsan {
  28
  29 ///// Interface to the common LSan module. /////
  30 bool WordIsPoisoned(uptr addr) {
  31   return false;
  32 }
  33
  34 }  // namespace __lsan
  35
  36 using namespace __lsan;  // NOLINT
  37
  38 static void InitializeFlags() {
  39   // Set all the default values.
  40   SetCommonFlagsDefaults();
  41   {
  42     CommonFlags cf;
  43     cf.CopyFrom(*common_flags());
  44     cf.external_symbolizer_path = GetEnv("LSAN_SYMBOLIZER_PATH");
  45     cf.malloc_context_size = 30;
  46     cf.detect_leaks = true;
  47     cf.exitcode = 23;
  48     OverrideCommonFlags(cf);
  49   }
  50
  51   Flags *f = flags();
  52   f->SetDefaults();
  53
  54   FlagParser parser;
  55   RegisterLsanFlags(&parser, f);
  56   RegisterCommonFlags(&parser);
  57
  58   parser.ParseString(GetEnv("LSAN_OPTIONS"));
  59
  60   SetVerbosity(common_flags()->verbosity);
  61
  62   if (Verbosity()) ReportUnrecognizedFlags();
  63
  64   if (common_flags()->help) parser.PrintFlagDescriptions();
  65 }
  66
  67 extern "C" void __lsan_init() {
  68   CHECK(!lsan_init_is_running);
  69   if (lsan_inited)
  70     return;
  71   lsan_init_is_running = true;
  72   SanitizerToolName = "LeakSanitizer";
  73   CacheBinaryName();
  74   InitializeFlags();
  75   InitCommonLsan();
  76   InitializeAllocator();
  77   InitTlsSize();
  78   InitializeInterceptors();
  79   InitializeThreadRegistry();
  80   u32 tid = ThreadCreate(0, 0, true);
  81   CHECK_EQ(tid, 0);
  82   ThreadStart(tid, GetTid());
  83   SetCurrentThread(tid);
  84
  85   if (common_flags()->detect_leaks && common_flags()->leak_check_at_exit)
  86     Atexit(DoLeakCheck);
  87
  88   InitializeCoverage(common_flags()->coverage, common_flags()->coverage_dir);
  89
  90   lsan_inited = true;
  91   lsan_init_is_running = false;
  92 }
  93
  94 extern "C" SANITIZER_INTERFACE_ATTRIBUTE
  95 void __sanitizer_print_stack_trace() {
  96   GET_STACK_TRACE_FATAL;
  97   stack.Print();
  98 }