1 //===-- tsan_platform.h -----------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file is a part of ThreadSanitizer (TSan), a race detector.
12 // Platform-specific code.
13 //===----------------------------------------------------------------------===//
15 #ifndef TSAN_PLATFORM_H
16 #define TSAN_PLATFORM_H
18 #if !defined(__LP64__) && !defined(_WIN64)
19 # error "Only 64-bit is supported"
22 #include "tsan_defs.h"
23 #include "tsan_trace.h"
27 #if !defined(SANITIZER_GO)
30 C/C++ on linux and freebsd
31 0000 0000 1000 - 0100 0000 0000: main binary and/or MAP_32BIT mappings
32 0100 0000 0000 - 0200 0000 0000: -
33 0200 0000 0000 - 1000 0000 0000: shadow
34 1000 0000 0000 - 3000 0000 0000: -
35 3000 0000 0000 - 4000 0000 0000: metainfo (memory blocks and sync objects)
36 4000 0000 0000 - 6000 0000 0000: -
37 6000 0000 0000 - 6200 0000 0000: traces
38 6200 0000 0000 - 7d00 0000 0000: -
39 7d00 0000 0000 - 7e00 0000 0000: heap
40 7e00 0000 0000 - 7e80 0000 0000: -
41 7e80 0000 0000 - 8000 0000 0000: modules and main thread stack
44 const uptr kMetaShadowBeg = 0x300000000000ull;
45 const uptr kMetaShadowEnd = 0x400000000000ull;
46 const uptr kTraceMemBeg = 0x600000000000ull;
47 const uptr kTraceMemEnd = 0x620000000000ull;
48 const uptr kShadowBeg = 0x020000000000ull;
49 const uptr kShadowEnd = 0x100000000000ull;
50 const uptr kHeapMemBeg = 0x7d0000000000ull;
51 const uptr kHeapMemEnd = 0x7e0000000000ull;
52 const uptr kLoAppMemBeg = 0x000000001000ull;
53 const uptr kLoAppMemEnd = 0x010000000000ull;
54 const uptr kHiAppMemBeg = 0x7e8000000000ull;
55 const uptr kHiAppMemEnd = 0x800000000000ull;
56 const uptr kAppMemMsk = 0x7c0000000000ull;
57 const uptr kAppMemXor = 0x020000000000ull;
60 bool IsAppMem(uptr mem) {
61 return (mem >= kHeapMemBeg && mem < kHeapMemEnd) ||
62 (mem >= kLoAppMemBeg && mem < kLoAppMemEnd) ||
63 (mem >= kHiAppMemBeg && mem < kHiAppMemEnd);
67 bool IsShadowMem(uptr mem) {
68 return mem >= kShadowBeg && mem <= kShadowEnd;
72 bool IsMetaMem(uptr mem) {
73 return mem >= kMetaShadowBeg && mem <= kMetaShadowEnd;
77 uptr MemToShadow(uptr x) {
79 return (((x) & ~(kAppMemMsk | (kShadowCell - 1)))
80 ^ kAppMemXor) * kShadowCnt;
84 u32 *MemToMeta(uptr x) {
86 return (u32*)(((((x) & ~(kAppMemMsk | (kMetaShadowCell - 1)))
87 ^ kAppMemXor) / kMetaShadowCell * kMetaShadowSize) | kMetaShadowBeg);
91 uptr ShadowToMem(uptr s) {
92 CHECK(IsShadowMem(s));
93 if (s >= MemToShadow(kLoAppMemBeg) && s <= MemToShadow(kLoAppMemEnd - 1))
94 return (s / kShadowCnt) ^ kAppMemXor;
96 return ((s / kShadowCnt) ^ kAppMemXor) | kAppMemMsk;
99 static USED uptr UserRegions[] = {
100 kLoAppMemBeg, kLoAppMemEnd,
101 kHiAppMemBeg, kHiAppMemEnd,
102 kHeapMemBeg, kHeapMemEnd,
105 #elif defined(SANITIZER_GO) && !SANITIZER_WINDOWS
107 /* Go on linux, darwin and freebsd
108 0000 0000 1000 - 0000 1000 0000: executable
109 0000 1000 0000 - 00c0 0000 0000: -
110 00c0 0000 0000 - 00e0 0000 0000: heap
111 00e0 0000 0000 - 2000 0000 0000: -
112 2000 0000 0000 - 2380 0000 0000: shadow
113 2380 0000 0000 - 3000 0000 0000: -
114 3000 0000 0000 - 4000 0000 0000: metainfo (memory blocks and sync objects)
115 4000 0000 0000 - 6000 0000 0000: -
116 6000 0000 0000 - 6200 0000 0000: traces
117 6200 0000 0000 - 8000 0000 0000: -
120 const uptr kMetaShadowBeg = 0x300000000000ull;
121 const uptr kMetaShadowEnd = 0x400000000000ull;
122 const uptr kTraceMemBeg = 0x600000000000ull;
123 const uptr kTraceMemEnd = 0x620000000000ull;
124 const uptr kShadowBeg = 0x200000000000ull;
125 const uptr kShadowEnd = 0x238000000000ull;
126 const uptr kAppMemBeg = 0x000000001000ull;
127 const uptr kAppMemEnd = 0x00e000000000ull;
130 bool IsAppMem(uptr mem) {
131 return mem >= kAppMemBeg && mem < kAppMemEnd;
135 bool IsShadowMem(uptr mem) {
136 return mem >= kShadowBeg && mem <= kShadowEnd;
140 bool IsMetaMem(uptr mem) {
141 return mem >= kMetaShadowBeg && mem <= kMetaShadowEnd;
145 uptr MemToShadow(uptr x) {
147 return ((x & ~(kShadowCell - 1)) * kShadowCnt) | kShadowBeg;
151 u32 *MemToMeta(uptr x) {
153 return (u32*)(((x & ~(kMetaShadowCell - 1)) / \
154 kMetaShadowCell * kMetaShadowSize) | kMetaShadowBeg);
158 uptr ShadowToMem(uptr s) {
159 CHECK(IsShadowMem(s));
160 return (s & ~kShadowBeg) / kShadowCnt;
163 static USED uptr UserRegions[] = {
164 kAppMemBeg, kAppMemEnd,
167 #elif defined(SANITIZER_GO) && SANITIZER_WINDOWS
170 0000 0000 1000 - 0000 1000 0000: executable
171 0000 1000 0000 - 00f8 0000 0000: -
172 00c0 0000 0000 - 00e0 0000 0000: heap
173 00e0 0000 0000 - 0100 0000 0000: -
174 0100 0000 0000 - 0380 0000 0000: shadow
175 0380 0000 0000 - 0560 0000 0000: -
176 0560 0000 0000 - 0760 0000 0000: traces
177 0760 0000 0000 - 07d0 0000 0000: metainfo (memory blocks and sync objects)
178 07d0 0000 0000 - 8000 0000 0000: -
181 const uptr kMetaShadowBeg = 0x076000000000ull;
182 const uptr kMetaShadowEnd = 0x07d000000000ull;
183 const uptr kTraceMemBeg = 0x056000000000ull;
184 const uptr kTraceMemEnd = 0x076000000000ull;
185 const uptr kShadowBeg = 0x010000000000ull;
186 const uptr kShadowEnd = 0x038000000000ull;
187 const uptr kAppMemBeg = 0x000000001000ull;
188 const uptr kAppMemEnd = 0x00e000000000ull;
191 bool IsAppMem(uptr mem) {
192 return mem >= kAppMemBeg && mem < kAppMemEnd;
196 bool IsShadowMem(uptr mem) {
197 return mem >= kShadowBeg && mem <= kShadowEnd;
201 bool IsMetaMem(uptr mem) {
202 return mem >= kMetaShadowBeg && mem <= kMetaShadowEnd;
206 uptr MemToShadow(uptr x) {
208 return ((x & ~(kShadowCell - 1)) * kShadowCnt) | kShadowBeg;
212 u32 *MemToMeta(uptr x) {
214 return (u32*)(((x & ~(kMetaShadowCell - 1)) / \
215 kMetaShadowCell * kMetaShadowSize) | kMetaShadowEnd);
219 uptr ShadowToMem(uptr s) {
220 CHECK(IsShadowMem(s));
221 // FIXME(dvyukov): this is most likely wrong as the mapping is not bijection.
222 return (x & ~kShadowBeg) / kShadowCnt;
225 static USED uptr UserRegions[] = {
226 kAppMemBeg, kAppMemEnd,
230 # error "Unknown platform"
233 // The additional page is to catch shadow stack overflow as paging fault.
234 // Windows wants 64K alignment for mmaps.
235 const uptr kTotalTraceSize = (kTraceSize * sizeof(Event) + sizeof(Trace)
236 + (64 << 10) + (64 << 10) - 1) & ~((64 << 10) - 1);
238 uptr ALWAYS_INLINE GetThreadTrace(int tid) {
239 uptr p = kTraceMemBeg + (uptr)tid * kTotalTraceSize;
240 DCHECK_LT(p, kTraceMemEnd);
244 uptr ALWAYS_INLINE GetThreadTraceHeader(int tid) {
245 uptr p = kTraceMemBeg + (uptr)tid * kTotalTraceSize
246 + kTraceSize * sizeof(Event);
247 DCHECK_LT(p, kTraceMemEnd);
251 void InitializePlatform();
252 void FlushShadowMemory();
253 void WriteMemoryProfile(char *buf, uptr buf_size, uptr nthread, uptr nlive);
255 // Says whether the addr relates to a global var.
256 // Guesses with high probability, may yield both false positives and negatives.
257 bool IsGlobalVar(uptr addr);
258 int ExtractResolvFDs(void *state, int *fds, int nfd);
259 int ExtractRecvmsgFDs(void *msg, int *fds, int nfd);
261 int call_pthread_cancel_with_cleanup(int(*fn)(void *c, void *m,
262 void *abstime), void *c, void *m, void *abstime,
263 void(*cleanup)(void *arg), void *arg);
265 } // namespace __tsan
267 #endif // TSAN_PLATFORM_H