1 //===-- tsan_defs.h ---------------------------------------------*- C++ -*-===//
3 // This file is distributed under the University of Illinois Open Source
4 // License. See LICENSE.TXT for details.
6 //===----------------------------------------------------------------------===//
8 // This file is a part of ThreadSanitizer (TSan), a race detector.
10 //===----------------------------------------------------------------------===//
15 #include "sanitizer_common/sanitizer_internal_defs.h"
16 #include "sanitizer_common/sanitizer_libc.h"
17 #include "tsan_stat.h"
26 const bool kGoMode
= true;
27 const bool kCppMode
= false;
28 const char *const kTsanOptionsEnv
= "GORACE";
29 // Go linker does not support weak symbols.
32 const bool kGoMode
= false;
33 const bool kCppMode
= true;
34 const char *const kTsanOptionsEnv
= "TSAN_OPTIONS";
38 const int kTidBits
= 13;
39 const unsigned kMaxTid
= 1 << kTidBits
;
40 const unsigned kMaxTidInClock
= kMaxTid
* 2; // This includes msb 'freed' bit.
41 const int kClkBits
= 42;
42 const unsigned kMaxTidReuse
= (1 << (64 - kClkBits
)) - 1;
43 const uptr kShadowStackSize
= 64 * 1024;
45 #ifdef TSAN_SHADOW_COUNT
46 # if TSAN_SHADOW_COUNT == 2 \
47 || TSAN_SHADOW_COUNT == 4 || TSAN_SHADOW_COUNT == 8
48 const uptr kShadowCnt
= TSAN_SHADOW_COUNT
;
50 # error "TSAN_SHADOW_COUNT must be one of 2,4,8"
53 // Count of shadow values in a shadow cell.
54 #define TSAN_SHADOW_COUNT 4
55 const uptr kShadowCnt
= 4;
58 // That many user bytes are mapped onto a single shadow cell.
59 const uptr kShadowCell
= 8;
61 // Size of a single shadow value (u64).
62 const uptr kShadowSize
= 8;
64 // Shadow memory is kShadowMultiplier times larger than user memory.
65 const uptr kShadowMultiplier
= kShadowSize
* kShadowCnt
/ kShadowCell
;
67 // That many user bytes are mapped onto a single meta shadow cell.
68 // Must be less or equal to minimal memory allocator alignment.
69 const uptr kMetaShadowCell
= 8;
71 // Size of a single meta shadow value (u32).
72 const uptr kMetaShadowSize
= 4;
74 #if defined(TSAN_NO_HISTORY) && TSAN_NO_HISTORY
75 const bool kCollectHistory
= false;
77 const bool kCollectHistory
= true;
80 #if defined(TSAN_COLLECT_STATS) && TSAN_COLLECT_STATS
81 const bool kCollectStats
= true;
83 const bool kCollectStats
= false;
86 // The following "build consistency" machinery ensures that all source files
87 // are built in the same configuration. Inconsistent builds lead to
88 // hard to debug crashes.
90 void build_consistency_debug();
92 void build_consistency_release();
95 #if TSAN_COLLECT_STATS
96 void build_consistency_stats();
98 void build_consistency_nostats();
101 #if TSAN_SHADOW_COUNT == 1
102 void build_consistency_shadow1();
103 #elif TSAN_SHADOW_COUNT == 2
104 void build_consistency_shadow2();
105 #elif TSAN_SHADOW_COUNT == 4
106 void build_consistency_shadow4();
108 void build_consistency_shadow8();
111 static inline void USED
build_consistency() {
113 build_consistency_debug();
115 build_consistency_release();
117 #if TSAN_COLLECT_STATS
118 build_consistency_stats();
120 build_consistency_nostats();
122 #if TSAN_SHADOW_COUNT == 1
123 build_consistency_shadow1();
124 #elif TSAN_SHADOW_COUNT == 2
125 build_consistency_shadow2();
126 #elif TSAN_SHADOW_COUNT == 4
127 build_consistency_shadow4();
129 build_consistency_shadow8();
135 return a
< b
? a
: b
;
140 return a
> b
? a
: b
;
144 T
RoundUp(T p
, u64 align
) {
145 DCHECK_EQ(align
& (align
- 1), 0);
146 return (T
)(((u64
)p
+ align
- 1) & ~(align
- 1));
150 T
RoundDown(T p
, u64 align
) {
151 DCHECK_EQ(align
& (align
- 1), 0);
152 return (T
)((u64
)p
& ~(align
- 1));
155 // Zeroizes high part, returns 'bits' lsb bits.
157 T
GetLsb(T v
, int bits
) {
158 return (T
)((u64
)v
& ((1ull << bits
) - 1));
163 bool operator==(const MD5Hash
&other
) const;
166 MD5Hash
md5_hash(const void *data
, uptr size
);
175 // Descriptor of user's memory block.
182 COMPILER_CHECK(sizeof(MBlock
) == 16);
184 } // namespace __tsan
186 #endif // TSAN_DEFS_H