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