1//===-- tsan_flags.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 ThreadSanitizer (TSan), a race detector. 11// 12//===----------------------------------------------------------------------===// 13 14#include "sanitizer_common/sanitizer_flags.h" 15#include "sanitizer_common/sanitizer_flag_parser.h" 16#include "sanitizer_common/sanitizer_libc.h" 17#include "tsan_flags.h" 18#include "tsan_rtl.h" 19#include "tsan_mman.h" 20#include "ubsan/ubsan_flags.h" 21 22namespace __tsan { 23 24// Can be overriden in frontend. 25#ifdef TSAN_EXTERNAL_HOOKS 26extern "C" const char* __tsan_default_options(); 27#else 28SANITIZER_WEAK_DEFAULT_IMPL 29const char *__tsan_default_options() { 30 return ""; 31} 32#endif 33 34void Flags::SetDefaults() { 35#define TSAN_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue; 36#include "tsan_flags.inc" 37#undef TSAN_FLAG 38 // DDFlags 39 second_deadlock_stack = false; 40} 41 42void RegisterTsanFlags(FlagParser *parser, Flags *f) { 43#define TSAN_FLAG(Type, Name, DefaultValue, Description) \ 44 RegisterFlag(parser, #Name, Description, &f->Name); 45#include "tsan_flags.inc" 46#undef TSAN_FLAG 47 // DDFlags 48 RegisterFlag(parser, "second_deadlock_stack", 49 "Report where each mutex is locked in deadlock reports", 50 &f->second_deadlock_stack); 51} 52 53void InitializeFlags(Flags *f, const char *env) { 54 SetCommonFlagsDefaults(); 55 { 56 // Override some common flags defaults. 57 CommonFlags cf; 58 cf.CopyFrom(*common_flags()); 59 cf.allow_addr2line = true; 60 if (SANITIZER_GO) { 61 // Does not work as expected for Go: runtime handles SIGABRT and crashes. 62 cf.abort_on_error = false; 63 // Go does not have mutexes. 64 cf.detect_deadlocks = false; 65 } 66 cf.print_suppressions = false; 67 cf.stack_trace_format = " #%n %f %S %M"; 68 cf.exitcode = 66; 69 cf.intercept_tls_get_addr = true; 70 OverrideCommonFlags(cf); 71 } 72 73 f->SetDefaults(); 74 75 FlagParser parser; 76 RegisterTsanFlags(&parser, f); 77 RegisterCommonFlags(&parser); 78 79#if TSAN_CONTAINS_UBSAN 80 __ubsan::Flags *uf = __ubsan::flags(); 81 uf->SetDefaults(); 82 83 FlagParser ubsan_parser; 84 __ubsan::RegisterUbsanFlags(&ubsan_parser, uf); 85 RegisterCommonFlags(&ubsan_parser); 86#endif 87 88 // Let a frontend override. 89 parser.ParseString(__tsan_default_options()); 90#if TSAN_CONTAINS_UBSAN 91 const char *ubsan_default_options = __ubsan::MaybeCallUbsanDefaultOptions(); 92 ubsan_parser.ParseString(ubsan_default_options); 93#endif 94 // Override from command line. 95 parser.ParseString(env); 96#if TSAN_CONTAINS_UBSAN 97 ubsan_parser.ParseString(GetEnv("UBSAN_OPTIONS")); 98#endif 99 100 // Sanity check. 101 if (!f->report_bugs) { 102 f->report_thread_leaks = false; 103 f->report_destroy_locked = false; 104 f->report_signal_unsafe = false; 105 } 106 107 InitializeCommonFlags(); 108 109 if (Verbosity()) ReportUnrecognizedFlags(); 110 111 if (common_flags()->help) parser.PrintFlagDescriptions(); 112 113 if (f->history_size < 0 || f->history_size > 7) { 114 Printf("ThreadSanitizer: incorrect value for history_size" 115 " (must be [0..7])\n"); 116 Die(); 117 } 118 119 if (f->io_sync < 0 || f->io_sync > 2) { 120 Printf("ThreadSanitizer: incorrect value for io_sync" 121 " (must be [0..2])\n"); 122 Die(); 123 } 124} 125 126} // namespace __tsan 127