1 //===-- ubsan_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 // Runtime flags for UndefinedBehaviorSanitizer.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "ubsan_platform.h"
15 #if CAN_SANITIZE_UB
16 #include "ubsan_flags.h"
17 #include "sanitizer_common/sanitizer_common.h"
18 #include "sanitizer_common/sanitizer_flags.h"
19 #include "sanitizer_common/sanitizer_flag_parser.h"
20
21 namespace __ubsan {
22
MaybeCallUbsanDefaultOptions()23 const char *MaybeCallUbsanDefaultOptions() {
24 return (&__ubsan_default_options) ? __ubsan_default_options() : "";
25 }
26
27 Flags ubsan_flags;
28
SetDefaults()29 void Flags::SetDefaults() {
30 #define UBSAN_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue;
31 #include "ubsan_flags.inc"
32 #undef UBSAN_FLAG
33 }
34
RegisterUbsanFlags(FlagParser * parser,Flags * f)35 void RegisterUbsanFlags(FlagParser *parser, Flags *f) {
36 #define UBSAN_FLAG(Type, Name, DefaultValue, Description) \
37 RegisterFlag(parser, #Name, Description, &f->Name);
38 #include "ubsan_flags.inc"
39 #undef UBSAN_FLAG
40 }
41
InitializeFlags()42 void InitializeFlags() {
43 SetCommonFlagsDefaults();
44 {
45 CommonFlags cf;
46 cf.CopyFrom(*common_flags());
47 cf.print_summary = false;
48 OverrideCommonFlags(cf);
49 }
50
51 Flags *f = flags();
52 f->SetDefaults();
53
54 FlagParser parser;
55 RegisterCommonFlags(&parser);
56 RegisterUbsanFlags(&parser, f);
57
58 // Override from user-specified string.
59 parser.ParseString(MaybeCallUbsanDefaultOptions());
60 // Override from environment variable.
61 parser.ParseString(GetEnv("UBSAN_OPTIONS"));
62 SetVerbosity(common_flags()->verbosity);
63 if (Verbosity()) ReportUnrecognizedFlags();
64
65 if (common_flags()->help) parser.PrintFlagDescriptions();
66 }
67
68 } // namespace __ubsan
69
70 extern "C" {
71
72 #if !SANITIZER_SUPPORTS_WEAK_HOOKS
73 SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
__ubsan_default_options()74 const char *__ubsan_default_options() { return ""; }
75 #endif
76
77 #if SANITIZER_WINDOWS
__ubsan_default_default_options()78 const char *__ubsan_default_default_options() { return ""; }
79 # ifdef _WIN64
80 # pragma comment(linker, "/alternatename:__ubsan_default_options=__ubsan_default_default_options")
81 # else
82 # pragma comment(linker, "/alternatename:___ubsan_default_options=___ubsan_default_default_options")
83 # endif
84 #endif
85
86 } // extern "C"
87
88 #endif // CAN_SANITIZE_UB
89