libsanitizer/tsan/tsan_flags.cc

   1 //===-- tsan_flags.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 ThreadSanitizer (TSan), a race detector.
   9 //
  10 //===----------------------------------------------------------------------===//
  11
  12 #include "sanitizer_common/sanitizer_flags.h"
  13 #include "sanitizer_common/sanitizer_libc.h"
  14 #include "tsan_flags.h"
  15 #include "tsan_rtl.h"
  16 #include "tsan_mman.h"
  17
  18 namespace __tsan {
  19
  20 Flags *flags() {
  21   return &ctx->flags;
  22 }
  23
  24 // Can be overriden in frontend.
  25 #ifdef TSAN_EXTERNAL_HOOKS
  26 extern "C" const char* __tsan_default_options();
  27 #else
  28 extern "C" SANITIZER_INTERFACE_ATTRIBUTE
  29 const char *WEAK __tsan_default_options() {
  30   return "";
  31 }
  32 #endif
  33
  34 static void ParseFlags(Flags *f, const char *env) {
  35   ParseFlag(env, &f->enable_annotations, "enable_annotations", "");
  36   ParseFlag(env, &f->suppress_equal_stacks, "suppress_equal_stacks", "");
  37   ParseFlag(env, &f->suppress_equal_addresses, "suppress_equal_addresses", "");
  38   ParseFlag(env, &f->report_bugs, "report_bugs", "");
  39   ParseFlag(env, &f->report_thread_leaks, "report_thread_leaks", "");
  40   ParseFlag(env, &f->report_destroy_locked, "report_destroy_locked", "");
  41   ParseFlag(env, &f->report_mutex_bugs, "report_mutex_bugs", "");
  42   ParseFlag(env, &f->report_signal_unsafe, "report_signal_unsafe", "");
  43   ParseFlag(env, &f->report_atomic_races, "report_atomic_races", "");
  44   ParseFlag(env, &f->force_seq_cst_atomics, "force_seq_cst_atomics", "");
  45   ParseFlag(env, &f->print_benign, "print_benign", "");
  46   ParseFlag(env, &f->exitcode, "exitcode", "");
  47   ParseFlag(env, &f->halt_on_error, "halt_on_error", "");
  48   ParseFlag(env, &f->atexit_sleep_ms, "atexit_sleep_ms", "");
  49   ParseFlag(env, &f->profile_memory, "profile_memory", "");
  50   ParseFlag(env, &f->flush_memory_ms, "flush_memory_ms", "");
  51   ParseFlag(env, &f->flush_symbolizer_ms, "flush_symbolizer_ms", "");
  52   ParseFlag(env, &f->memory_limit_mb, "memory_limit_mb", "");
  53   ParseFlag(env, &f->stop_on_start, "stop_on_start", "");
  54   ParseFlag(env, &f->running_on_valgrind, "running_on_valgrind", "");
  55   ParseFlag(env, &f->history_size, "history_size", "");
  56   ParseFlag(env, &f->io_sync, "io_sync", "");
  57   ParseFlag(env, &f->die_after_fork, "die_after_fork", "");
  58
  59   // DDFlags
  60   ParseFlag(env, &f->second_deadlock_stack, "second_deadlock_stack", "");
  61 }
  62
  63 void InitializeFlags(Flags *f, const char *env) {
  64   internal_memset(f, 0, sizeof(*f));
  65
  66   // Default values.
  67   f->enable_annotations = true;
  68   f->suppress_equal_stacks = true;
  69   f->suppress_equal_addresses = true;
  70   f->report_bugs = true;
  71   f->report_thread_leaks = true;
  72   f->report_destroy_locked = true;
  73   f->report_mutex_bugs = true;
  74   f->report_signal_unsafe = true;
  75   f->report_atomic_races = true;
  76   f->force_seq_cst_atomics = false;
  77   f->print_benign = false;
  78   f->exitcode = 66;
  79   f->halt_on_error = false;
  80   f->atexit_sleep_ms = 1000;
  81   f->profile_memory = "";
  82   f->flush_memory_ms = 0;
  83   f->flush_symbolizer_ms = 5000;
  84   f->memory_limit_mb = 0;
  85   f->stop_on_start = false;
  86   f->running_on_valgrind = false;
  87   f->history_size = kGoMode ? 1 : 2;  // There are a lot of goroutines in Go.
  88   f->io_sync = 1;
  89   f->die_after_fork = true;
  90
  91   // DDFlags
  92   f->second_deadlock_stack = false;
  93
  94   CommonFlags *cf = common_flags();
  95   SetCommonFlagsDefaults(cf);
  96   // Override some common flags defaults.
  97   cf->allow_addr2line = true;
  98   cf->detect_deadlocks = true;
  99   cf->print_suppressions = false;
 100
 101   // Let a frontend override.
 102   ParseFlags(f, __tsan_default_options());
 103   ParseCommonFlagsFromString(cf, __tsan_default_options());
 104   // Override from command line.
 105   ParseFlags(f, env);
 106   ParseCommonFlagsFromString(cf, env);
 107
 108   // Sanity check.
 109   if (!f->report_bugs) {
 110     f->report_thread_leaks = false;
 111     f->report_destroy_locked = false;
 112     f->report_signal_unsafe = false;
 113   }
 114
 115   if (cf->help) PrintFlagDescriptions();
 116
 117   if (f->history_size < 0 || f->history_size > 7) {
 118     Printf("ThreadSanitizer: incorrect value for history_size"
 119            " (must be [0..7])\n");
 120     Die();
 121   }
 122
 123   if (f->io_sync < 0 || f->io_sync > 2) {
 124     Printf("ThreadSanitizer: incorrect value for io_sync"
 125            " (must be [0..2])\n");
 126     Die();
 127   }
 128 }
 129
 130 }  // namespace __tsan