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1 //===-- tsan_platform.h -----------------------------------------*- C++ -*-===//
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 // This file is a part of ThreadSanitizer (TSan), a race detector.
11 //
12 // Platform-specific code.
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef TSAN_PLATFORM_H
16 #define TSAN_PLATFORM_H
17 
18 #if !defined(__LP64__) && !defined(_WIN64)
19 # error "Only 64-bit is supported"
20 #endif
21 
22 #include "tsan_defs.h"
23 #include "tsan_trace.h"
24 
25 namespace __tsan {
26 
27 #if !defined(SANITIZER_GO)
28 
29 #if defined(__x86_64__)
30 /*
31 C/C++ on linux/x86_64 and freebsd/x86_64
32 0000 0000 1000 - 0100 0000 0000: main binary and/or MAP_32BIT mappings
33 0100 0000 0000 - 0200 0000 0000: -
34 0200 0000 0000 - 1000 0000 0000: shadow
35 1000 0000 0000 - 3000 0000 0000: -
36 3000 0000 0000 - 4000 0000 0000: metainfo (memory blocks and sync objects)
37 4000 0000 0000 - 6000 0000 0000: -
38 6000 0000 0000 - 6200 0000 0000: traces
39 6200 0000 0000 - 7d00 0000 0000: -
40 7d00 0000 0000 - 7e00 0000 0000: heap
41 7e00 0000 0000 - 7e80 0000 0000: -
42 7e80 0000 0000 - 8000 0000 0000: modules and main thread stack
43 */
44 struct Mapping {
45   static const uptr kMetaShadowBeg = 0x300000000000ull;
46   static const uptr kMetaShadowEnd = 0x400000000000ull;
47   static const uptr kTraceMemBeg   = 0x600000000000ull;
48   static const uptr kTraceMemEnd   = 0x620000000000ull;
49   static const uptr kShadowBeg     = 0x020000000000ull;
50   static const uptr kShadowEnd     = 0x100000000000ull;
51   static const uptr kHeapMemBeg    = 0x7d0000000000ull;
52   static const uptr kHeapMemEnd    = 0x7e0000000000ull;
53   static const uptr kLoAppMemBeg   = 0x000000001000ull;
54   static const uptr kLoAppMemEnd   = 0x010000000000ull;
55   static const uptr kHiAppMemBeg   = 0x7e8000000000ull;
56   static const uptr kHiAppMemEnd   = 0x800000000000ull;
57   static const uptr kAppMemMsk     = 0x7c0000000000ull;
58   static const uptr kAppMemXor     = 0x020000000000ull;
59   static const uptr kVdsoBeg       = 0xf000000000000000ull;
60 };
61 #elif defined(__mips64)
62 /*
63 C/C++ on linux/mips64
64 0100 0000 00 - 0200 0000 00: main binary
65 0200 0000 00 - 1400 0000 00: -
66 1400 0000 00 - 2400 0000 00: shadow
67 2400 0000 00 - 3000 0000 00: -
68 3000 0000 00 - 4000 0000 00: metainfo (memory blocks and sync objects)
69 4000 0000 00 - 6000 0000 00: -
70 6000 0000 00 - 6200 0000 00: traces
71 6200 0000 00 - fe00 0000 00: -
72 fe00 0000 00 - ff00 0000 00: heap
73 ff00 0000 00 - ff80 0000 00: -
74 ff80 0000 00 - ffff ffff ff: modules and main thread stack
75 */
76 struct Mapping {
77   static const uptr kMetaShadowBeg = 0x3000000000ull;
78   static const uptr kMetaShadowEnd = 0x4000000000ull;
79   static const uptr kTraceMemBeg   = 0x6000000000ull;
80   static const uptr kTraceMemEnd   = 0x6200000000ull;
81   static const uptr kShadowBeg     = 0x1400000000ull;
82   static const uptr kShadowEnd     = 0x2400000000ull;
83   static const uptr kHeapMemBeg    = 0xfe00000000ull;
84   static const uptr kHeapMemEnd    = 0xff00000000ull;
85   static const uptr kLoAppMemBeg   = 0x0100000000ull;
86   static const uptr kLoAppMemEnd   = 0x0200000000ull;
87   static const uptr kHiAppMemBeg   = 0xff80000000ull;
88   static const uptr kHiAppMemEnd   = 0xffffffffffull;
89   static const uptr kAppMemMsk     = 0xfc00000000ull;
90   static const uptr kAppMemXor     = 0x0400000000ull;
91   static const uptr kVdsoBeg       = 0xfffff00000ull;
92 };
93 #elif defined(__aarch64__)
94 // AArch64 supports multiple VMA which leads to multiple address transformation
95 // functions.  To support these multiple VMAS transformations and mappings TSAN
96 // runtime for AArch64 uses an external memory read (vmaSize) to select which
97 // mapping to use.  Although slower, it make a same instrumented binary run on
98 // multiple kernels.
99 
100 /*
101 C/C++ on linux/aarch64 (39-bit VMA)
102 0000 0010 00 - 0100 0000 00: main binary
103 0100 0000 00 - 0800 0000 00: -
104 0800 0000 00 - 2000 0000 00: shadow memory
105 2000 0000 00 - 3100 0000 00: -
106 3100 0000 00 - 3400 0000 00: metainfo
107 3400 0000 00 - 5500 0000 00: -
108 5500 0000 00 - 5600 0000 00: main binary (PIE)
109 5600 0000 00 - 6000 0000 00: -
110 6000 0000 00 - 6200 0000 00: traces
111 6200 0000 00 - 7d00 0000 00: -
112 7c00 0000 00 - 7d00 0000 00: heap
113 7d00 0000 00 - 7fff ffff ff: modules and main thread stack
114 */
115 struct Mapping39 {
116   static const uptr kLoAppMemBeg   = 0x0000001000ull;
117   static const uptr kLoAppMemEnd   = 0x0100000000ull;
118   static const uptr kShadowBeg     = 0x0800000000ull;
119   static const uptr kShadowEnd     = 0x2000000000ull;
120   static const uptr kMetaShadowBeg = 0x3100000000ull;
121   static const uptr kMetaShadowEnd = 0x3400000000ull;
122   static const uptr kMidAppMemBeg  = 0x5500000000ull;
123   static const uptr kMidAppMemEnd  = 0x5600000000ull;
124   static const uptr kMidShadowOff  = 0x5000000000ull;
125   static const uptr kTraceMemBeg   = 0x6000000000ull;
126   static const uptr kTraceMemEnd   = 0x6200000000ull;
127   static const uptr kHeapMemBeg    = 0x7c00000000ull;
128   static const uptr kHeapMemEnd    = 0x7d00000000ull;
129   static const uptr kHiAppMemBeg   = 0x7e00000000ull;
130   static const uptr kHiAppMemEnd   = 0x7fffffffffull;
131   static const uptr kAppMemMsk     = 0x7800000000ull;
132   static const uptr kAppMemXor     = 0x0200000000ull;
133   static const uptr kVdsoBeg       = 0x7f00000000ull;
134 };
135 
136 /*
137 C/C++ on linux/aarch64 (42-bit VMA)
138 00000 0010 00 - 01000 0000 00: main binary
139 01000 0000 00 - 10000 0000 00: -
140 10000 0000 00 - 20000 0000 00: shadow memory
141 20000 0000 00 - 26000 0000 00: -
142 26000 0000 00 - 28000 0000 00: metainfo
143 28000 0000 00 - 2aa00 0000 00: -
144 2aa00 0000 00 - 2ab00 0000 00: main binary (PIE)
145 2ab00 0000 00 - 36200 0000 00: -
146 36200 0000 00 - 36240 0000 00: traces
147 36240 0000 00 - 3e000 0000 00: -
148 3e000 0000 00 - 3f000 0000 00: heap
149 3f000 0000 00 - 3ffff ffff ff: modules and main thread stack
150 */
151 struct Mapping42 {
152   static const uptr kLoAppMemBeg   = 0x00000001000ull;
153   static const uptr kLoAppMemEnd   = 0x01000000000ull;
154   static const uptr kShadowBeg     = 0x10000000000ull;
155   static const uptr kShadowEnd     = 0x20000000000ull;
156   static const uptr kMetaShadowBeg = 0x26000000000ull;
157   static const uptr kMetaShadowEnd = 0x28000000000ull;
158   static const uptr kMidAppMemBeg  = 0x2aa00000000ull;
159   static const uptr kMidAppMemEnd  = 0x2ab00000000ull;
160   static const uptr kMidShadowOff  = 0x28000000000ull;
161   static const uptr kTraceMemBeg   = 0x36200000000ull;
162   static const uptr kTraceMemEnd   = 0x36400000000ull;
163   static const uptr kHeapMemBeg    = 0x3e000000000ull;
164   static const uptr kHeapMemEnd    = 0x3f000000000ull;
165   static const uptr kHiAppMemBeg   = 0x3f000000000ull;
166   static const uptr kHiAppMemEnd   = 0x3ffffffffffull;
167   static const uptr kAppMemMsk     = 0x3c000000000ull;
168   static const uptr kAppMemXor     = 0x04000000000ull;
169   static const uptr kVdsoBeg       = 0x37f00000000ull;
170 };
171 
172 // Indicates the runtime will define the memory regions at runtime.
173 #define TSAN_RUNTIME_VMA 1
174 // Indicates that mapping defines a mid range memory segment.
175 #define TSAN_MID_APP_RANGE 1
176 #elif defined(__powerpc64__)
177 // PPC64 supports multiple VMA which leads to multiple address transformation
178 // functions.  To support these multiple VMAS transformations and mappings TSAN
179 // runtime for PPC64 uses an external memory read (vmaSize) to select which
180 // mapping to use.  Although slower, it make a same instrumented binary run on
181 // multiple kernels.
182 
183 /*
184 C/C++ on linux/powerpc64 (44-bit VMA)
185 0000 0000 0100 - 0001 0000 0000: main binary
186 0001 0000 0000 - 0001 0000 0000: -
187 0001 0000 0000 - 0b00 0000 0000: shadow
188 0b00 0000 0000 - 0b00 0000 0000: -
189 0b00 0000 0000 - 0d00 0000 0000: metainfo (memory blocks and sync objects)
190 0d00 0000 0000 - 0d00 0000 0000: -
191 0d00 0000 0000 - 0f00 0000 0000: traces
192 0f00 0000 0000 - 0f00 0000 0000: -
193 0f00 0000 0000 - 0f50 0000 0000: heap
194 0f50 0000 0000 - 0f60 0000 0000: -
195 0f60 0000 0000 - 1000 0000 0000: modules and main thread stack
196 */
197 struct Mapping44 {
198   static const uptr kMetaShadowBeg = 0x0b0000000000ull;
199   static const uptr kMetaShadowEnd = 0x0d0000000000ull;
200   static const uptr kTraceMemBeg   = 0x0d0000000000ull;
201   static const uptr kTraceMemEnd   = 0x0f0000000000ull;
202   static const uptr kShadowBeg     = 0x000100000000ull;
203   static const uptr kShadowEnd     = 0x0b0000000000ull;
204   static const uptr kLoAppMemBeg   = 0x000000000100ull;
205   static const uptr kLoAppMemEnd   = 0x000100000000ull;
206   static const uptr kHeapMemBeg    = 0x0f0000000000ull;
207   static const uptr kHeapMemEnd    = 0x0f5000000000ull;
208   static const uptr kHiAppMemBeg   = 0x0f6000000000ull;
209   static const uptr kHiAppMemEnd   = 0x100000000000ull; // 44 bits
210   static const uptr kAppMemMsk     = 0x0f0000000000ull;
211   static const uptr kAppMemXor     = 0x002100000000ull;
212   static const uptr kVdsoBeg       = 0x3c0000000000000ull;
213 };
214 
215 /*
216 C/C++ on linux/powerpc64 (46-bit VMA)
217 0000 0000 1000 - 0100 0000 0000: main binary
218 0100 0000 0000 - 0200 0000 0000: -
219 0100 0000 0000 - 1000 0000 0000: shadow
220 1000 0000 0000 - 1000 0000 0000: -
221 1000 0000 0000 - 2000 0000 0000: metainfo (memory blocks and sync objects)
222 2000 0000 0000 - 2000 0000 0000: -
223 2000 0000 0000 - 2200 0000 0000: traces
224 2200 0000 0000 - 3d00 0000 0000: -
225 3d00 0000 0000 - 3e00 0000 0000: heap
226 3e00 0000 0000 - 3e80 0000 0000: -
227 3e80 0000 0000 - 4000 0000 0000: modules and main thread stack
228 */
229 struct Mapping46 {
230   static const uptr kMetaShadowBeg = 0x100000000000ull;
231   static const uptr kMetaShadowEnd = 0x200000000000ull;
232   static const uptr kTraceMemBeg   = 0x200000000000ull;
233   static const uptr kTraceMemEnd   = 0x220000000000ull;
234   static const uptr kShadowBeg     = 0x010000000000ull;
235   static const uptr kShadowEnd     = 0x100000000000ull;
236   static const uptr kHeapMemBeg    = 0x3d0000000000ull;
237   static const uptr kHeapMemEnd    = 0x3e0000000000ull;
238   static const uptr kLoAppMemBeg   = 0x000000001000ull;
239   static const uptr kLoAppMemEnd   = 0x010000000000ull;
240   static const uptr kHiAppMemBeg   = 0x3e8000000000ull;
241   static const uptr kHiAppMemEnd   = 0x400000000000ull; // 46 bits
242   static const uptr kAppMemMsk     = 0x3c0000000000ull;
243   static const uptr kAppMemXor     = 0x020000000000ull;
244   static const uptr kVdsoBeg       = 0x7800000000000000ull;
245 };
246 
247 // Indicates the runtime will define the memory regions at runtime.
248 #define TSAN_RUNTIME_VMA 1
249 #endif
250 
251 #elif defined(SANITIZER_GO) && !SANITIZER_WINDOWS
252 
253 /* Go on linux, darwin and freebsd
254 0000 0000 1000 - 0000 1000 0000: executable
255 0000 1000 0000 - 00c0 0000 0000: -
256 00c0 0000 0000 - 00e0 0000 0000: heap
257 00e0 0000 0000 - 2000 0000 0000: -
258 2000 0000 0000 - 2380 0000 0000: shadow
259 2380 0000 0000 - 3000 0000 0000: -
260 3000 0000 0000 - 4000 0000 0000: metainfo (memory blocks and sync objects)
261 4000 0000 0000 - 6000 0000 0000: -
262 6000 0000 0000 - 6200 0000 0000: traces
263 6200 0000 0000 - 8000 0000 0000: -
264 */
265 
266 struct Mapping {
267   static const uptr kMetaShadowBeg = 0x300000000000ull;
268   static const uptr kMetaShadowEnd = 0x400000000000ull;
269   static const uptr kTraceMemBeg   = 0x600000000000ull;
270   static const uptr kTraceMemEnd   = 0x620000000000ull;
271   static const uptr kShadowBeg     = 0x200000000000ull;
272   static const uptr kShadowEnd     = 0x238000000000ull;
273   static const uptr kAppMemBeg     = 0x000000001000ull;
274   static const uptr kAppMemEnd     = 0x00e000000000ull;
275 };
276 
277 #elif defined(SANITIZER_GO) && SANITIZER_WINDOWS
278 
279 /* Go on windows
280 0000 0000 1000 - 0000 1000 0000: executable
281 0000 1000 0000 - 00f8 0000 0000: -
282 00c0 0000 0000 - 00e0 0000 0000: heap
283 00e0 0000 0000 - 0100 0000 0000: -
284 0100 0000 0000 - 0500 0000 0000: shadow
285 0500 0000 0000 - 0560 0000 0000: -
286 0560 0000 0000 - 0760 0000 0000: traces
287 0760 0000 0000 - 07d0 0000 0000: metainfo (memory blocks and sync objects)
288 07d0 0000 0000 - 8000 0000 0000: -
289 */
290 
291 struct Mapping {
292   static const uptr kMetaShadowBeg = 0x076000000000ull;
293   static const uptr kMetaShadowEnd = 0x07d000000000ull;
294   static const uptr kTraceMemBeg   = 0x056000000000ull;
295   static const uptr kTraceMemEnd   = 0x076000000000ull;
296   static const uptr kShadowBeg     = 0x010000000000ull;
297   static const uptr kShadowEnd     = 0x050000000000ull;
298   static const uptr kAppMemBeg     = 0x000000001000ull;
299   static const uptr kAppMemEnd     = 0x00e000000000ull;
300 };
301 
302 #else
303 # error "Unknown platform"
304 #endif
305 
306 
307 #ifdef TSAN_RUNTIME_VMA
308 extern uptr vmaSize;
309 #endif
310 
311 
312 enum MappingType {
313   MAPPING_LO_APP_BEG,
314   MAPPING_LO_APP_END,
315   MAPPING_HI_APP_BEG,
316   MAPPING_HI_APP_END,
317 #ifdef TSAN_MID_APP_RANGE
318   MAPPING_MID_APP_BEG,
319   MAPPING_MID_APP_END,
320 #endif
321   MAPPING_HEAP_BEG,
322   MAPPING_HEAP_END,
323   MAPPING_APP_BEG,
324   MAPPING_APP_END,
325   MAPPING_SHADOW_BEG,
326   MAPPING_SHADOW_END,
327   MAPPING_META_SHADOW_BEG,
328   MAPPING_META_SHADOW_END,
329   MAPPING_TRACE_BEG,
330   MAPPING_TRACE_END,
331   MAPPING_VDSO_BEG,
332 };
333 
334 template<typename Mapping, int Type>
MappingImpl(void)335 uptr MappingImpl(void) {
336   switch (Type) {
337 #ifndef SANITIZER_GO
338     case MAPPING_LO_APP_BEG: return Mapping::kLoAppMemBeg;
339     case MAPPING_LO_APP_END: return Mapping::kLoAppMemEnd;
340 # ifdef TSAN_MID_APP_RANGE
341     case MAPPING_MID_APP_BEG: return Mapping::kMidAppMemBeg;
342     case MAPPING_MID_APP_END: return Mapping::kMidAppMemEnd;
343 # endif
344     case MAPPING_HI_APP_BEG: return Mapping::kHiAppMemBeg;
345     case MAPPING_HI_APP_END: return Mapping::kHiAppMemEnd;
346     case MAPPING_HEAP_BEG: return Mapping::kHeapMemBeg;
347     case MAPPING_HEAP_END: return Mapping::kHeapMemEnd;
348     case MAPPING_VDSO_BEG: return Mapping::kVdsoBeg;
349 #else
350     case MAPPING_APP_BEG: return Mapping::kAppMemBeg;
351     case MAPPING_APP_END: return Mapping::kAppMemEnd;
352 #endif
353     case MAPPING_SHADOW_BEG: return Mapping::kShadowBeg;
354     case MAPPING_SHADOW_END: return Mapping::kShadowEnd;
355     case MAPPING_META_SHADOW_BEG: return Mapping::kMetaShadowBeg;
356     case MAPPING_META_SHADOW_END: return Mapping::kMetaShadowEnd;
357     case MAPPING_TRACE_BEG: return Mapping::kTraceMemBeg;
358     case MAPPING_TRACE_END: return Mapping::kTraceMemEnd;
359   }
360 }
361 
362 template<int Type>
MappingArchImpl(void)363 uptr MappingArchImpl(void) {
364 #ifdef __aarch64__
365   if (vmaSize == 39)
366     return MappingImpl<Mapping39, Type>();
367   else
368     return MappingImpl<Mapping42, Type>();
369   DCHECK(0);
370 #elif defined(__powerpc64__)
371   if (vmaSize == 44)
372     return MappingImpl<Mapping44, Type>();
373   else
374     return MappingImpl<Mapping46, Type>();
375   DCHECK(0);
376 #else
377   return MappingImpl<Mapping, Type>();
378 #endif
379 }
380 
381 #ifndef SANITIZER_GO
382 ALWAYS_INLINE
LoAppMemBeg(void)383 uptr LoAppMemBeg(void) {
384   return MappingArchImpl<MAPPING_LO_APP_BEG>();
385 }
386 ALWAYS_INLINE
LoAppMemEnd(void)387 uptr LoAppMemEnd(void) {
388   return MappingArchImpl<MAPPING_LO_APP_END>();
389 }
390 
391 #ifdef TSAN_MID_APP_RANGE
392 ALWAYS_INLINE
MidAppMemBeg(void)393 uptr MidAppMemBeg(void) {
394   return MappingArchImpl<MAPPING_MID_APP_BEG>();
395 }
396 ALWAYS_INLINE
MidAppMemEnd(void)397 uptr MidAppMemEnd(void) {
398   return MappingArchImpl<MAPPING_MID_APP_END>();
399 }
400 #endif
401 
402 ALWAYS_INLINE
HeapMemBeg(void)403 uptr HeapMemBeg(void) {
404   return MappingArchImpl<MAPPING_HEAP_BEG>();
405 }
406 ALWAYS_INLINE
HeapMemEnd(void)407 uptr HeapMemEnd(void) {
408   return MappingArchImpl<MAPPING_HEAP_END>();
409 }
410 
411 ALWAYS_INLINE
HiAppMemBeg(void)412 uptr HiAppMemBeg(void) {
413   return MappingArchImpl<MAPPING_HI_APP_BEG>();
414 }
415 ALWAYS_INLINE
HiAppMemEnd(void)416 uptr HiAppMemEnd(void) {
417   return MappingArchImpl<MAPPING_HI_APP_END>();
418 }
419 
420 ALWAYS_INLINE
VdsoBeg(void)421 uptr VdsoBeg(void) {
422   return MappingArchImpl<MAPPING_VDSO_BEG>();
423 }
424 
425 #else
426 
427 ALWAYS_INLINE
AppMemBeg(void)428 uptr AppMemBeg(void) {
429   return MappingArchImpl<MAPPING_APP_BEG>();
430 }
431 ALWAYS_INLINE
AppMemEnd(void)432 uptr AppMemEnd(void) {
433   return MappingArchImpl<MAPPING_APP_END>();
434 }
435 
436 #endif
437 
438 static inline
GetUserRegion(int i,uptr * start,uptr * end)439 bool GetUserRegion(int i, uptr *start, uptr *end) {
440   switch (i) {
441   default:
442     return false;
443 #ifndef SANITIZER_GO
444   case 0:
445     *start = LoAppMemBeg();
446     *end = LoAppMemEnd();
447     return true;
448   case 1:
449     *start = HiAppMemBeg();
450     *end = HiAppMemEnd();
451     return true;
452   case 2:
453     *start = HeapMemBeg();
454     *end = HeapMemEnd();
455     return true;
456 # ifdef TSAN_MID_APP_RANGE
457   case 3:
458     *start = MidAppMemBeg();
459     *end = MidAppMemEnd();
460     return true;
461 # endif
462 #else
463   case 0:
464     *start = AppMemBeg();
465     *end = AppMemEnd();
466     return true;
467 #endif
468   }
469 }
470 
471 ALWAYS_INLINE
ShadowBeg(void)472 uptr ShadowBeg(void) {
473   return MappingArchImpl<MAPPING_SHADOW_BEG>();
474 }
475 ALWAYS_INLINE
ShadowEnd(void)476 uptr ShadowEnd(void) {
477   return MappingArchImpl<MAPPING_SHADOW_END>();
478 }
479 
480 ALWAYS_INLINE
MetaShadowBeg(void)481 uptr MetaShadowBeg(void) {
482   return MappingArchImpl<MAPPING_META_SHADOW_BEG>();
483 }
484 ALWAYS_INLINE
MetaShadowEnd(void)485 uptr MetaShadowEnd(void) {
486   return MappingArchImpl<MAPPING_META_SHADOW_END>();
487 }
488 
489 ALWAYS_INLINE
TraceMemBeg(void)490 uptr TraceMemBeg(void) {
491   return MappingArchImpl<MAPPING_TRACE_BEG>();
492 }
493 ALWAYS_INLINE
TraceMemEnd(void)494 uptr TraceMemEnd(void) {
495   return MappingArchImpl<MAPPING_TRACE_END>();
496 }
497 
498 
499 template<typename Mapping>
IsAppMemImpl(uptr mem)500 bool IsAppMemImpl(uptr mem) {
501 #ifndef SANITIZER_GO
502   return (mem >= Mapping::kHeapMemBeg && mem < Mapping::kHeapMemEnd) ||
503 # ifdef TSAN_MID_APP_RANGE
504          (mem >= Mapping::kMidAppMemBeg && mem < Mapping::kMidAppMemEnd) ||
505 # endif
506          (mem >= Mapping::kLoAppMemBeg && mem < Mapping::kLoAppMemEnd) ||
507          (mem >= Mapping::kHiAppMemBeg && mem < Mapping::kHiAppMemEnd);
508 #else
509   return mem >= Mapping::kAppMemBeg && mem < Mapping::kAppMemEnd;
510 #endif
511 }
512 
513 ALWAYS_INLINE
IsAppMem(uptr mem)514 bool IsAppMem(uptr mem) {
515 #ifdef __aarch64__
516   if (vmaSize == 39)
517     return IsAppMemImpl<Mapping39>(mem);
518   else
519     return IsAppMemImpl<Mapping42>(mem);
520   DCHECK(0);
521 #elif defined(__powerpc64__)
522   if (vmaSize == 44)
523     return IsAppMemImpl<Mapping44>(mem);
524   else
525     return IsAppMemImpl<Mapping46>(mem);
526   DCHECK(0);
527 #else
528   return IsAppMemImpl<Mapping>(mem);
529 #endif
530 }
531 
532 
533 template<typename Mapping>
IsShadowMemImpl(uptr mem)534 bool IsShadowMemImpl(uptr mem) {
535   return mem >= Mapping::kShadowBeg && mem <= Mapping::kShadowEnd;
536 }
537 
538 ALWAYS_INLINE
IsShadowMem(uptr mem)539 bool IsShadowMem(uptr mem) {
540 #ifdef __aarch64__
541   if (vmaSize == 39)
542     return IsShadowMemImpl<Mapping39>(mem);
543   else
544     return IsShadowMemImpl<Mapping42>(mem);
545   DCHECK(0);
546 #elif defined(__powerpc64__)
547   if (vmaSize == 44)
548     return IsShadowMemImpl<Mapping44>(mem);
549   else
550     return IsShadowMemImpl<Mapping46>(mem);
551   DCHECK(0);
552 #else
553   return IsShadowMemImpl<Mapping>(mem);
554 #endif
555 }
556 
557 
558 template<typename Mapping>
IsMetaMemImpl(uptr mem)559 bool IsMetaMemImpl(uptr mem) {
560   return mem >= Mapping::kMetaShadowBeg && mem <= Mapping::kMetaShadowEnd;
561 }
562 
563 ALWAYS_INLINE
IsMetaMem(uptr mem)564 bool IsMetaMem(uptr mem) {
565 #ifdef __aarch64__
566   if (vmaSize == 39)
567     return IsMetaMemImpl<Mapping39>(mem);
568   else
569     return IsMetaMemImpl<Mapping42>(mem);
570   DCHECK(0);
571 #elif defined(__powerpc64__)
572   if (vmaSize == 44)
573     return IsMetaMemImpl<Mapping44>(mem);
574   else
575     return IsMetaMemImpl<Mapping46>(mem);
576   DCHECK(0);
577 #else
578   return IsMetaMemImpl<Mapping>(mem);
579 #endif
580 }
581 
582 
583 template<typename Mapping>
MemToShadowImpl(uptr x)584 uptr MemToShadowImpl(uptr x) {
585   DCHECK(IsAppMem(x));
586 #ifndef SANITIZER_GO
587   return (((x) & ~(Mapping::kAppMemMsk | (kShadowCell - 1)))
588       ^ Mapping::kAppMemXor) * kShadowCnt;
589 #else
590 # ifndef SANITIZER_WINDOWS
591   return ((x & ~(kShadowCell - 1)) * kShadowCnt) | Mapping::kShadowBeg;
592 # else
593   return ((x & ~(kShadowCell - 1)) * kShadowCnt) + Mapping::kShadowBeg;
594 # endif
595 #endif
596 }
597 
598 ALWAYS_INLINE
MemToShadow(uptr x)599 uptr MemToShadow(uptr x) {
600 #ifdef __aarch64__
601   if (vmaSize == 39)
602     return MemToShadowImpl<Mapping39>(x);
603   else
604     return MemToShadowImpl<Mapping42>(x);
605   DCHECK(0);
606 #elif defined(__powerpc64__)
607   if (vmaSize == 44)
608     return MemToShadowImpl<Mapping44>(x);
609   else
610     return MemToShadowImpl<Mapping46>(x);
611   DCHECK(0);
612 #else
613   return MemToShadowImpl<Mapping>(x);
614 #endif
615 }
616 
617 
618 template<typename Mapping>
MemToMetaImpl(uptr x)619 u32 *MemToMetaImpl(uptr x) {
620   DCHECK(IsAppMem(x));
621 #ifndef SANITIZER_GO
622   return (u32*)(((((x) & ~(Mapping::kAppMemMsk | (kMetaShadowCell - 1)))
623         ^ Mapping::kAppMemXor) / kMetaShadowCell * kMetaShadowSize)
624           | Mapping::kMetaShadowBeg);
625 #else
626   return (u32*)(((x & ~(kMetaShadowCell - 1)) / \
627       kMetaShadowCell * kMetaShadowSize) | Mapping::kMetaShadowBeg);
628 #endif
629 }
630 
631 ALWAYS_INLINE
MemToMeta(uptr x)632 u32 *MemToMeta(uptr x) {
633 #ifdef __aarch64__
634   if (vmaSize == 39)
635     return MemToMetaImpl<Mapping39>(x);
636   else
637     return MemToMetaImpl<Mapping42>(x);
638   DCHECK(0);
639 #elif defined(__powerpc64__)
640   if (vmaSize == 44)
641     return MemToMetaImpl<Mapping44>(x);
642   else
643     return MemToMetaImpl<Mapping46>(x);
644   DCHECK(0);
645 #else
646   return MemToMetaImpl<Mapping>(x);
647 #endif
648 }
649 
650 
651 template<typename Mapping>
ShadowToMemImpl(uptr s)652 uptr ShadowToMemImpl(uptr s) {
653   DCHECK(IsShadowMem(s));
654 #ifndef SANITIZER_GO
655   if (s >= MemToShadow(Mapping::kLoAppMemBeg)
656       && s <= MemToShadow(Mapping::kLoAppMemEnd - 1))
657     return (s / kShadowCnt) ^ Mapping::kAppMemXor;
658 # ifdef TSAN_MID_APP_RANGE
659   if (s >= MemToShadow(Mapping::kMidAppMemBeg)
660       && s <= MemToShadow(Mapping::kMidAppMemEnd - 1))
661     return ((s / kShadowCnt) ^ Mapping::kAppMemXor) + Mapping::kMidShadowOff;
662 # endif
663   else
664     return ((s / kShadowCnt) ^ Mapping::kAppMemXor) | Mapping::kAppMemMsk;
665 #else
666 # ifndef SANITIZER_WINDOWS
667   return (s & ~Mapping::kShadowBeg) / kShadowCnt;
668 # else
669   return (s - Mapping::kShadowBeg) / kShadowCnt;
670 # endif // SANITIZER_WINDOWS
671 #endif
672 }
673 
674 ALWAYS_INLINE
ShadowToMem(uptr s)675 uptr ShadowToMem(uptr s) {
676 #ifdef __aarch64__
677   if (vmaSize == 39)
678     return ShadowToMemImpl<Mapping39>(s);
679   else
680     return ShadowToMemImpl<Mapping42>(s);
681   DCHECK(0);
682 #elif defined(__powerpc64__)
683   if (vmaSize == 44)
684     return ShadowToMemImpl<Mapping44>(s);
685   else
686     return ShadowToMemImpl<Mapping46>(s);
687   DCHECK(0);
688 #else
689   return ShadowToMemImpl<Mapping>(s);
690 #endif
691 }
692 
693 
694 
695 // The additional page is to catch shadow stack overflow as paging fault.
696 // Windows wants 64K alignment for mmaps.
697 const uptr kTotalTraceSize = (kTraceSize * sizeof(Event) + sizeof(Trace)
698     + (64 << 10) + (64 << 10) - 1) & ~((64 << 10) - 1);
699 
700 template<typename Mapping>
GetThreadTraceImpl(int tid)701 uptr GetThreadTraceImpl(int tid) {
702   uptr p = Mapping::kTraceMemBeg + (uptr)tid * kTotalTraceSize;
703   DCHECK_LT(p, Mapping::kTraceMemEnd);
704   return p;
705 }
706 
707 ALWAYS_INLINE
GetThreadTrace(int tid)708 uptr GetThreadTrace(int tid) {
709 #ifdef __aarch64__
710   if (vmaSize == 39)
711     return GetThreadTraceImpl<Mapping39>(tid);
712   else
713     return GetThreadTraceImpl<Mapping42>(tid);
714   DCHECK(0);
715 #elif defined(__powerpc64__)
716   if (vmaSize == 44)
717     return GetThreadTraceImpl<Mapping44>(tid);
718   else
719     return GetThreadTraceImpl<Mapping46>(tid);
720   DCHECK(0);
721 #else
722   return GetThreadTraceImpl<Mapping>(tid);
723 #endif
724 }
725 
726 
727 template<typename Mapping>
GetThreadTraceHeaderImpl(int tid)728 uptr GetThreadTraceHeaderImpl(int tid) {
729   uptr p = Mapping::kTraceMemBeg + (uptr)tid * kTotalTraceSize
730       + kTraceSize * sizeof(Event);
731   DCHECK_LT(p, Mapping::kTraceMemEnd);
732   return p;
733 }
734 
735 ALWAYS_INLINE
GetThreadTraceHeader(int tid)736 uptr GetThreadTraceHeader(int tid) {
737 #ifdef __aarch64__
738   if (vmaSize == 39)
739     return GetThreadTraceHeaderImpl<Mapping39>(tid);
740   else
741     return GetThreadTraceHeaderImpl<Mapping42>(tid);
742   DCHECK(0);
743 #elif defined(__powerpc64__)
744   if (vmaSize == 44)
745     return GetThreadTraceHeaderImpl<Mapping44>(tid);
746   else
747     return GetThreadTraceHeaderImpl<Mapping46>(tid);
748   DCHECK(0);
749 #else
750   return GetThreadTraceHeaderImpl<Mapping>(tid);
751 #endif
752 }
753 
754 void InitializePlatform();
755 void InitializePlatformEarly();
756 void CheckAndProtect();
757 void InitializeShadowMemoryPlatform();
758 void FlushShadowMemory();
759 void WriteMemoryProfile(char *buf, uptr buf_size, uptr nthread, uptr nlive);
760 int ExtractResolvFDs(void *state, int *fds, int nfd);
761 int ExtractRecvmsgFDs(void *msg, int *fds, int nfd);
762 
763 int call_pthread_cancel_with_cleanup(int(*fn)(void *c, void *m,
764     void *abstime), void *c, void *m, void *abstime,
765     void(*cleanup)(void *arg), void *arg);
766 
767 void DestroyThreadState();
768 
769 }  // namespace __tsan
770 
771 #endif  // TSAN_PLATFORM_H
772