libsanitizer/lsan/lsan.cc

   1 //=-- lsan.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 LeakSanitizer.
   9 // Standalone LSan RTL.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "lsan.h"
  14
  15 #include "sanitizer_common/sanitizer_flags.h"
  16 #include "sanitizer_common/sanitizer_flag_parser.h"
  17 #include "sanitizer_common/sanitizer_stacktrace.h"
  18 #include "lsan_allocator.h"
  19 #include "lsan_common.h"
  20 #include "lsan_thread.h"
  21
  22 bool lsan_inited;
  23 bool lsan_init_is_running;
  24
  25 namespace __lsan {
  26
  27 ///// Interface to the common LSan module. /////
  28 bool WordIsPoisoned(uptr addr) {
  29   return false;
  30 }
  31
  32 }  // namespace __lsan
  33
  34 using namespace __lsan;  // NOLINT
  35
  36 static void InitializeFlags() {
  37   // Set all the default values.
  38   SetCommonFlagsDefaults();
  39   {
  40     CommonFlags cf;
  41     cf.CopyFrom(*common_flags());
  42     cf.external_symbolizer_path = GetEnv("LSAN_SYMBOLIZER_PATH");
  43     cf.malloc_context_size = 30;
  44     cf.intercept_tls_get_addr = true;
  45     cf.detect_leaks = true;
  46     cf.exitcode = 23;
  47     OverrideCommonFlags(cf);
  48   }
  49
  50   Flags *f = flags();
  51   f->SetDefaults();
  52
  53   FlagParser parser;
  54   RegisterLsanFlags(&parser, f);
  55   RegisterCommonFlags(&parser);
  56
  57   parser.ParseString(GetEnv("LSAN_OPTIONS"));
  58
  59   SetVerbosity(common_flags()->verbosity);
  60
  61   if (Verbosity()) ReportUnrecognizedFlags();
  62
  63   if (common_flags()->help) parser.PrintFlagDescriptions();
  64 }
  65
  66 extern "C" void __lsan_init() {
  67   CHECK(!lsan_init_is_running);
  68   if (lsan_inited)
  69     return;
  70   lsan_init_is_running = true;
  71   SanitizerToolName = "LeakSanitizer";
  72   CacheBinaryName();
  73   AvoidCVE_2016_2143();
  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 }