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;
43 const int kShadowStackSize
= 4 * 1024;
44 const int kTraceStackSize
= 256;
47 #ifdef TSAN_SHADOW_COUNT
48 # if TSAN_SHADOW_COUNT == 2 \
49 || TSAN_SHADOW_COUNT == 4 || TSAN_SHADOW_COUNT == 8
50 const uptr kShadowCnt
= TSAN_SHADOW_COUNT
;
52 # error "TSAN_SHADOW_COUNT must be one of 2,4,8"
55 // Count of shadow values in a shadow cell.
56 const uptr kShadowCnt
= 4;
59 // That many user bytes are mapped onto a single shadow cell.
60 const uptr kShadowCell
= 8;
62 // Size of a single shadow value (u64).
63 const uptr kShadowSize
= 8;
65 // Shadow memory is kShadowMultiplier times larger than user memory.
66 const uptr kShadowMultiplier
= kShadowSize
* kShadowCnt
/ kShadowCell
;
68 #if defined(TSAN_COLLECT_STATS) && TSAN_COLLECT_STATS
69 const bool kCollectStats
= true;
71 const bool kCollectStats
= false;
74 // The following "build consistency" machinery ensures that all source files
75 // are built in the same configuration. Inconsistent builds lead to
76 // hard to debug crashes.
78 void build_consistency_debug();
80 void build_consistency_release();
83 #if TSAN_COLLECT_STATS
84 void build_consistency_stats();
86 void build_consistency_nostats();
89 #if TSAN_SHADOW_COUNT == 1
90 void build_consistency_shadow1();
91 #elif TSAN_SHADOW_COUNT == 2
92 void build_consistency_shadow2();
93 #elif TSAN_SHADOW_COUNT == 4
94 void build_consistency_shadow4();
96 void build_consistency_shadow8();
99 static inline void USED
build_consistency() {
101 build_consistency_debug();
103 build_consistency_release();
105 #if TSAN_COLLECT_STATS
106 build_consistency_stats();
108 build_consistency_nostats();
110 #if TSAN_SHADOW_COUNT == 1
111 build_consistency_shadow1();
112 #elif TSAN_SHADOW_COUNT == 2
113 build_consistency_shadow2();
114 #elif TSAN_SHADOW_COUNT == 4
115 build_consistency_shadow4();
117 build_consistency_shadow8();
123 return a
< b
? a
: b
;
128 return a
> b
? a
: b
;
132 T
RoundUp(T p
, u64 align
) {
133 DCHECK_EQ(align
& (align
- 1), 0);
134 return (T
)(((u64
)p
+ align
- 1) & ~(align
- 1));
138 T
RoundDown(T p
, u64 align
) {
139 DCHECK_EQ(align
& (align
- 1), 0);
140 return (T
)((u64
)p
& ~(align
- 1));
143 // Zeroizes high part, returns 'bits' lsb bits.
145 T
GetLsb(T v
, int bits
) {
146 return (T
)((u64
)v
& ((1ull << bits
) - 1));
151 bool operator==(const MD5Hash
&other
) const;
154 MD5Hash
md5_hash(const void *data
, uptr size
);
157 struct ThreadContext
;
165 } // namespace __tsan
167 #endif // TSAN_DEFS_H