1 //===-- tsan_platform.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 // Platform-specific code.
11 //===----------------------------------------------------------------------===//
14 C++ linux memory layout:
15 0000 0000 0000 - 03c0 0000 0000: protected
16 03c0 0000 0000 - 1000 0000 0000: shadow
17 1000 0000 0000 - 6000 0000 0000: protected
18 6000 0000 0000 - 6200 0000 0000: traces
19 6200 0000 0000 - 7d00 0000 0000: -
20 7d00 0000 0000 - 7e00 0000 0000: heap
21 7e00 0000 0000 - 7fff ffff ffff: modules and main thread stack
23 C++ COMPAT linux memory layout:
24 0000 0000 0000 - 0400 0000 0000: protected
25 0400 0000 0000 - 1000 0000 0000: shadow
26 1000 0000 0000 - 2900 0000 0000: protected
27 2900 0000 0000 - 2c00 0000 0000: modules
28 2c00 0000 0000 - 6000 0000 0000: -
29 6000 0000 0000 - 6200 0000 0000: traces
30 6200 0000 0000 - 7d00 0000 0000: -
31 7d00 0000 0000 - 7e00 0000 0000: heap
32 7e00 0000 0000 - 7f00 0000 0000: -
33 7f00 0000 0000 - 7fff ffff ffff: main thread stack
35 Go linux and darwin memory layout:
36 0000 0000 0000 - 0000 1000 0000: executable
37 0000 1000 0000 - 00f8 0000 0000: -
38 00f8 0000 0000 - 0118 0000 0000: heap
39 0118 0000 0000 - 1000 0000 0000: -
40 1000 0000 0000 - 1460 0000 0000: shadow
41 1460 0000 0000 - 6000 0000 0000: -
42 6000 0000 0000 - 6200 0000 0000: traces
43 6200 0000 0000 - 7fff ffff ffff: -
45 Go windows memory layout:
46 0000 0000 0000 - 0000 1000 0000: executable
47 0000 1000 0000 - 00f8 0000 0000: -
48 00f8 0000 0000 - 0118 0000 0000: heap
49 0118 0000 0000 - 0100 0000 0000: -
50 0100 0000 0000 - 0560 0000 0000: shadow
51 0560 0000 0000 - 0760 0000 0000: traces
52 0760 0000 0000 - 07ff ffff ffff: -
55 #ifndef TSAN_PLATFORM_H
56 #define TSAN_PLATFORM_H
58 #include "tsan_defs.h"
59 #include "tsan_trace.h"
61 #if defined(__LP64__) || defined(_WIN64)
65 static const uptr kLinuxAppMemBeg
= 0x000000000000ULL
;
66 static const uptr kLinuxAppMemEnd
= 0x00fcffffffffULL
;
68 static const uptr kLinuxShadowMsk
= 0x010000000000ULL
;
70 static const uptr kLinuxShadowMsk
= 0x100000000000ULL
;
72 // TSAN_COMPAT_SHADOW is intended for COMPAT virtual memory layout,
73 // when memory addresses are of the 0x2axxxxxxxxxx form.
74 // The option is enabled with 'setarch x86_64 -L'.
75 #elif defined(TSAN_COMPAT_SHADOW) && TSAN_COMPAT_SHADOW
76 static const uptr kLinuxAppMemBeg
= 0x290000000000ULL
;
77 static const uptr kLinuxAppMemEnd
= 0x7fffffffffffULL
;
79 static const uptr kLinuxAppMemBeg
= 0x7cf000000000ULL
;
80 static const uptr kLinuxAppMemEnd
= 0x7fffffffffffULL
;
83 static const uptr kLinuxAppMemMsk
= 0x7c0000000000ULL
;
86 const uptr kTraceMemBegin
= 0x056000000000ULL
;
88 const uptr kTraceMemBegin
= 0x600000000000ULL
;
90 const uptr kTraceMemSize
= 0x020000000000ULL
;
92 // This has to be a macro to allow constant initialization of constants below.
94 #define MemToShadow(addr) \
95 (((addr) & ~(kLinuxAppMemMsk | (kShadowCell - 1))) * kShadowCnt)
97 #define MemToShadow(addr) \
98 ((((addr) & ~(kShadowCell - 1)) * kShadowCnt) | kLinuxShadowMsk)
101 static const uptr kLinuxShadowBeg
= MemToShadow(kLinuxAppMemBeg
);
102 static const uptr kLinuxShadowEnd
=
103 MemToShadow(kLinuxAppMemEnd
) | 0xff;
105 static inline bool IsAppMem(uptr mem
) {
106 return mem
>= kLinuxAppMemBeg
&& mem
<= kLinuxAppMemEnd
;
109 static inline bool IsShadowMem(uptr mem
) {
110 return mem
>= kLinuxShadowBeg
&& mem
<= kLinuxShadowEnd
;
113 static inline uptr
ShadowToMem(uptr shadow
) {
114 CHECK(IsShadowMem(shadow
));
116 return (shadow
& ~kLinuxShadowMsk
) / kShadowCnt
;
118 return (shadow
/ kShadowCnt
) | kLinuxAppMemMsk
;
122 // For COMPAT mapping returns an alternative address
123 // that mapped to the same shadow address.
124 // COMPAT mapping is not quite one-to-one.
125 static inline uptr
AlternativeAddress(uptr addr
) {
126 #if defined(TSAN_COMPAT_SHADOW) && TSAN_COMPAT_SHADOW
127 return (addr
& ~kLinuxAppMemMsk
) | 0x280000000000ULL
;
133 uptr
GetShadowMemoryConsumption();
134 void FlushShadowMemory();
136 const char *InitializePlatform();
137 void FinalizePlatform();
138 uptr ALWAYS_INLINE INLINE
GetThreadTrace(int tid
) {
139 uptr p
= kTraceMemBegin
+ (uptr
)tid
* kTraceSize
* sizeof(Event
);
140 DCHECK_LT(p
, kTraceMemBegin
+ kTraceMemSize
);
144 void internal_start_thread(void(*func
)(void*), void *arg
);
146 // Says whether the addr relates to a global var.
147 // Guesses with high probability, may yield both false positives and negatives.
148 bool IsGlobalVar(uptr addr
);
150 void GetThreadStackAndTls(bool main
, uptr
*stk_addr
, uptr
*stk_size
,
151 uptr
*tls_addr
, uptr
*tls_size
);
152 int ExtractResolvFDs(void *state
, int *fds
, int nfd
);
154 } // namespace __tsan
156 #else // defined(__LP64__) || defined(_WIN64)
157 # error "Only 64-bit is supported"
160 #endif // TSAN_PLATFORM_H