xref: /freebsd/contrib/llvm-project/compiler-rt/lib/msan/msan.h (revision 77a1348b3c1cfe8547be49a121b56299a1e18b69)
1 //===-- msan.h --------------------------------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file is a part of MemorySanitizer.
10 //
11 // Private MSan header.
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef MSAN_H
15 #define MSAN_H
16 
17 #include "sanitizer_common/sanitizer_flags.h"
18 #include "sanitizer_common/sanitizer_internal_defs.h"
19 #include "sanitizer_common/sanitizer_stacktrace.h"
20 #include "msan_interface_internal.h"
21 #include "msan_flags.h"
22 #include "ubsan/ubsan_platform.h"
23 
24 #ifndef MSAN_REPLACE_OPERATORS_NEW_AND_DELETE
25 # define MSAN_REPLACE_OPERATORS_NEW_AND_DELETE 1
26 #endif
27 
28 #ifndef MSAN_CONTAINS_UBSAN
29 # define MSAN_CONTAINS_UBSAN CAN_SANITIZE_UB
30 #endif
31 
32 struct MappingDesc {
33   uptr start;
34   uptr end;
35   enum Type {
36     INVALID, APP, SHADOW, ORIGIN
37   } type;
38   const char *name;
39 };
40 
41 
42 #if SANITIZER_LINUX && defined(__mips64)
43 
44 // MIPS64 maps:
45 // - 0x0000000000-0x0200000000: Program own segments
46 // - 0xa200000000-0xc000000000: PIE program segments
47 // - 0xe200000000-0xffffffffff: libraries segments.
48 const MappingDesc kMemoryLayout[] = {
49     {0x000000000000ULL, 0x000200000000ULL, MappingDesc::APP, "app-1"},
50     {0x000200000000ULL, 0x002200000000ULL, MappingDesc::INVALID, "invalid"},
51     {0x002200000000ULL, 0x004000000000ULL, MappingDesc::SHADOW, "shadow-2"},
52     {0x004000000000ULL, 0x004200000000ULL, MappingDesc::INVALID, "invalid"},
53     {0x004200000000ULL, 0x006000000000ULL, MappingDesc::ORIGIN, "origin-2"},
54     {0x006000000000ULL, 0x006200000000ULL, MappingDesc::INVALID, "invalid"},
55     {0x006200000000ULL, 0x008000000000ULL, MappingDesc::SHADOW, "shadow-3"},
56     {0x008000000000ULL, 0x008200000000ULL, MappingDesc::SHADOW, "shadow-1"},
57     {0x008200000000ULL, 0x00a000000000ULL, MappingDesc::ORIGIN, "origin-3"},
58     {0x00a000000000ULL, 0x00a200000000ULL, MappingDesc::ORIGIN, "origin-1"},
59     {0x00a200000000ULL, 0x00c000000000ULL, MappingDesc::APP, "app-2"},
60     {0x00c000000000ULL, 0x00e200000000ULL, MappingDesc::INVALID, "invalid"},
61     {0x00e200000000ULL, 0x00ffffffffffULL, MappingDesc::APP, "app-3"}};
62 
63 #define MEM_TO_SHADOW(mem) (((uptr)(mem)) ^ 0x8000000000ULL)
64 #define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x2000000000ULL)
65 
66 #elif SANITIZER_LINUX && defined(__aarch64__)
67 
68 // The mapping describes both 39-bits, 42-bits, and 48-bits VMA.  AArch64
69 // maps:
70 // - 0x0000000000000-0x0000010000000: 39/42/48-bits program own segments
71 // - 0x0005500000000-0x0005600000000: 39-bits PIE program segments
72 // - 0x0007f80000000-0x0007fffffffff: 39-bits libraries segments
73 // - 0x002aa00000000-0x002ab00000000: 42-bits PIE program segments
74 // - 0x003ff00000000-0x003ffffffffff: 42-bits libraries segments
75 // - 0x0aaaaa0000000-0x0aaab00000000: 48-bits PIE program segments
76 // - 0xffff000000000-0x1000000000000: 48-bits libraries segments
77 // It is fragmented in multiples segments to increase the memory available
78 // on 42-bits (12.21% of total VMA available for 42-bits and 13.28 for
79 // 39 bits). The 48-bits segments only cover the usual PIE/default segments
80 // plus some more segments (262144GB total, 0.39% total VMA).
81 const MappingDesc kMemoryLayout[] = {
82     {0x00000000000ULL, 0x01000000000ULL, MappingDesc::INVALID, "invalid"},
83     {0x01000000000ULL, 0x02000000000ULL, MappingDesc::SHADOW, "shadow-2"},
84     {0x02000000000ULL, 0x03000000000ULL, MappingDesc::ORIGIN, "origin-2"},
85     {0x03000000000ULL, 0x04000000000ULL, MappingDesc::SHADOW, "shadow-1"},
86     {0x04000000000ULL, 0x05000000000ULL, MappingDesc::ORIGIN, "origin-1"},
87     {0x05000000000ULL, 0x06000000000ULL, MappingDesc::APP, "app-1"},
88     {0x06000000000ULL, 0x07000000000ULL, MappingDesc::INVALID, "invalid"},
89     {0x07000000000ULL, 0x08000000000ULL, MappingDesc::APP, "app-2"},
90     {0x08000000000ULL, 0x09000000000ULL, MappingDesc::INVALID, "invalid"},
91     // The mappings below are used only for 42-bits VMA.
92     {0x09000000000ULL, 0x0A000000000ULL, MappingDesc::SHADOW, "shadow-3"},
93     {0x0A000000000ULL, 0x0B000000000ULL, MappingDesc::ORIGIN, "origin-3"},
94     {0x0B000000000ULL, 0x0F000000000ULL, MappingDesc::INVALID, "invalid"},
95     {0x0F000000000ULL, 0x10000000000ULL, MappingDesc::APP, "app-3"},
96     {0x10000000000ULL, 0x11000000000ULL, MappingDesc::INVALID, "invalid"},
97     {0x11000000000ULL, 0x12000000000ULL, MappingDesc::APP, "app-4"},
98     {0x12000000000ULL, 0x17000000000ULL, MappingDesc::INVALID, "invalid"},
99     {0x17000000000ULL, 0x18000000000ULL, MappingDesc::SHADOW, "shadow-4"},
100     {0x18000000000ULL, 0x19000000000ULL, MappingDesc::ORIGIN, "origin-4"},
101     {0x19000000000ULL, 0x20000000000ULL, MappingDesc::INVALID, "invalid"},
102     {0x20000000000ULL, 0x21000000000ULL, MappingDesc::APP, "app-5"},
103     {0x21000000000ULL, 0x26000000000ULL, MappingDesc::INVALID, "invalid"},
104     {0x26000000000ULL, 0x27000000000ULL, MappingDesc::SHADOW, "shadow-5"},
105     {0x27000000000ULL, 0x28000000000ULL, MappingDesc::ORIGIN, "origin-5"},
106     {0x28000000000ULL, 0x29000000000ULL, MappingDesc::SHADOW, "shadow-7"},
107     {0x29000000000ULL, 0x2A000000000ULL, MappingDesc::ORIGIN, "origin-7"},
108     {0x2A000000000ULL, 0x2B000000000ULL, MappingDesc::APP, "app-6"},
109     {0x2B000000000ULL, 0x2C000000000ULL, MappingDesc::INVALID, "invalid"},
110     {0x2C000000000ULL, 0x2D000000000ULL, MappingDesc::SHADOW, "shadow-6"},
111     {0x2D000000000ULL, 0x2E000000000ULL, MappingDesc::ORIGIN, "origin-6"},
112     {0x2E000000000ULL, 0x2F000000000ULL, MappingDesc::APP, "app-7"},
113     {0x2F000000000ULL, 0x39000000000ULL, MappingDesc::INVALID, "invalid"},
114     {0x39000000000ULL, 0x3A000000000ULL, MappingDesc::SHADOW, "shadow-9"},
115     {0x3A000000000ULL, 0x3B000000000ULL, MappingDesc::ORIGIN, "origin-9"},
116     {0x3B000000000ULL, 0x3C000000000ULL, MappingDesc::APP, "app-8"},
117     {0x3C000000000ULL, 0x3D000000000ULL, MappingDesc::INVALID, "invalid"},
118     {0x3D000000000ULL, 0x3E000000000ULL, MappingDesc::SHADOW, "shadow-8"},
119     {0x3E000000000ULL, 0x3F000000000ULL, MappingDesc::ORIGIN, "origin-8"},
120     {0x3F000000000ULL, 0x40000000000ULL, MappingDesc::APP, "app-9"},
121     // The mappings below are used only for 48-bits VMA.
122     // TODO(unknown): 48-bit mapping ony covers the usual PIE, non-PIE
123     // segments and some more segments totalizing 262144GB of VMA (which cover
124     // only 0.32% of all 48-bit VMA). Memory avaliability can be increase by
125     // adding multiple application segments like 39 and 42 mapping.
126     {0x0040000000000ULL, 0x0041000000000ULL, MappingDesc::INVALID, "invalid"},
127     {0x0041000000000ULL, 0x0042000000000ULL, MappingDesc::APP, "app-10"},
128     {0x0042000000000ULL, 0x0047000000000ULL, MappingDesc::INVALID, "invalid"},
129     {0x0047000000000ULL, 0x0048000000000ULL, MappingDesc::SHADOW, "shadow-10"},
130     {0x0048000000000ULL, 0x0049000000000ULL, MappingDesc::ORIGIN, "origin-10"},
131     {0x0049000000000ULL, 0x0050000000000ULL, MappingDesc::INVALID, "invalid"},
132     {0x0050000000000ULL, 0x0051000000000ULL, MappingDesc::APP, "app-11"},
133     {0x0051000000000ULL, 0x0056000000000ULL, MappingDesc::INVALID, "invalid"},
134     {0x0056000000000ULL, 0x0057000000000ULL, MappingDesc::SHADOW, "shadow-11"},
135     {0x0057000000000ULL, 0x0058000000000ULL, MappingDesc::ORIGIN, "origin-11"},
136     {0x0058000000000ULL, 0x0059000000000ULL, MappingDesc::APP, "app-12"},
137     {0x0059000000000ULL, 0x005E000000000ULL, MappingDesc::INVALID, "invalid"},
138     {0x005E000000000ULL, 0x005F000000000ULL, MappingDesc::SHADOW, "shadow-12"},
139     {0x005F000000000ULL, 0x0060000000000ULL, MappingDesc::ORIGIN, "origin-12"},
140     {0x0060000000000ULL, 0x0061000000000ULL, MappingDesc::INVALID, "invalid"},
141     {0x0061000000000ULL, 0x0062000000000ULL, MappingDesc::APP, "app-13"},
142     {0x0062000000000ULL, 0x0067000000000ULL, MappingDesc::INVALID, "invalid"},
143     {0x0067000000000ULL, 0x0068000000000ULL, MappingDesc::SHADOW, "shadow-13"},
144     {0x0068000000000ULL, 0x0069000000000ULL, MappingDesc::ORIGIN, "origin-13"},
145     {0x0069000000000ULL, 0x0AAAAA0000000ULL, MappingDesc::INVALID, "invalid"},
146     {0x0AAAAA0000000ULL, 0x0AAAB00000000ULL, MappingDesc::APP, "app-14"},
147     {0x0AAAB00000000ULL, 0x0AACAA0000000ULL, MappingDesc::INVALID, "invalid"},
148     {0x0AACAA0000000ULL, 0x0AACB00000000ULL, MappingDesc::SHADOW, "shadow-14"},
149     {0x0AACB00000000ULL, 0x0AADAA0000000ULL, MappingDesc::INVALID, "invalid"},
150     {0x0AADAA0000000ULL, 0x0AADB00000000ULL, MappingDesc::ORIGIN, "origin-14"},
151     {0x0AADB00000000ULL, 0x0FF9F00000000ULL, MappingDesc::INVALID, "invalid"},
152     {0x0FF9F00000000ULL, 0x0FFA000000000ULL, MappingDesc::SHADOW, "shadow-15"},
153     {0x0FFA000000000ULL, 0x0FFAF00000000ULL, MappingDesc::INVALID, "invalid"},
154     {0x0FFAF00000000ULL, 0x0FFB000000000ULL, MappingDesc::ORIGIN, "origin-15"},
155     {0x0FFB000000000ULL, 0x0FFFF00000000ULL, MappingDesc::INVALID, "invalid"},
156     {0x0FFFF00000000ULL, 0x1000000000000ULL, MappingDesc::APP, "app-15"},
157 };
158 # define MEM_TO_SHADOW(mem) ((uptr)mem ^ 0x6000000000ULL)
159 # define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x1000000000ULL)
160 
161 #elif SANITIZER_LINUX && SANITIZER_PPC64
162 const MappingDesc kMemoryLayout[] = {
163     {0x000000000000ULL, 0x000200000000ULL, MappingDesc::APP, "low memory"},
164     {0x000200000000ULL, 0x080000000000ULL, MappingDesc::INVALID, "invalid"},
165     {0x080000000000ULL, 0x180200000000ULL, MappingDesc::SHADOW, "shadow"},
166     {0x180200000000ULL, 0x1C0000000000ULL, MappingDesc::INVALID, "invalid"},
167     {0x1C0000000000ULL, 0x2C0200000000ULL, MappingDesc::ORIGIN, "origin"},
168     {0x2C0200000000ULL, 0x300000000000ULL, MappingDesc::INVALID, "invalid"},
169     {0x300000000000ULL, 0x800000000000ULL, MappingDesc::APP, "high memory"}};
170 
171 // Various kernels use different low end ranges but we can combine them into one
172 // big range. They also use different high end ranges but we can map them all to
173 // one range.
174 // Maps low and high app ranges to contiguous space with zero base:
175 //   Low:  0000 0000 0000 - 0001 ffff ffff  ->  1000 0000 0000 - 1001 ffff ffff
176 //   High: 3000 0000 0000 - 3fff ffff ffff  ->  0000 0000 0000 - 0fff ffff ffff
177 //   High: 4000 0000 0000 - 4fff ffff ffff  ->  0000 0000 0000 - 0fff ffff ffff
178 //   High: 7000 0000 0000 - 7fff ffff ffff  ->  0000 0000 0000 - 0fff ffff ffff
179 #define LINEARIZE_MEM(mem) \
180   (((uptr)(mem) & ~0xE00000000000ULL) ^ 0x100000000000ULL)
181 #define MEM_TO_SHADOW(mem) (LINEARIZE_MEM((mem)) + 0x080000000000ULL)
182 #define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x140000000000ULL)
183 
184 #elif SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 64
185 
186 // Low memory: main binary, MAP_32BIT mappings and modules
187 // High memory: heap, modules and main thread stack
188 const MappingDesc kMemoryLayout[] = {
189     {0x000000000000ULL, 0x010000000000ULL, MappingDesc::APP, "low memory"},
190     {0x010000000000ULL, 0x100000000000ULL, MappingDesc::INVALID, "invalid"},
191     {0x100000000000ULL, 0x310000000000ULL, MappingDesc::SHADOW, "shadow"},
192     {0x310000000000ULL, 0x380000000000ULL, MappingDesc::INVALID, "invalid"},
193     {0x380000000000ULL, 0x590000000000ULL, MappingDesc::ORIGIN, "origin"},
194     {0x590000000000ULL, 0x600000000000ULL, MappingDesc::INVALID, "invalid"},
195     {0x600000000000ULL, 0x800000000000ULL, MappingDesc::APP, "high memory"}};
196 
197 // Maps low and high app ranges to contiguous space with zero base:
198 //   Low:  0000 0000 0000 - 00ff ffff ffff  ->  2000 0000 0000 - 20ff ffff ffff
199 //   High: 6000 0000 0000 - 7fff ffff ffff  ->  0000 0000 0000 - 1fff ffff ffff
200 #define LINEARIZE_MEM(mem) \
201   (((uptr)(mem) & ~0xc00000000000ULL) ^ 0x200000000000ULL)
202 #define MEM_TO_SHADOW(mem) (LINEARIZE_MEM((mem)) + 0x100000000000ULL)
203 #define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x280000000000)
204 
205 #elif SANITIZER_NETBSD || (SANITIZER_LINUX && SANITIZER_WORDSIZE == 64)
206 
207 #ifdef MSAN_LINUX_X86_64_OLD_MAPPING
208 // Requries PIE binary and ASLR enabled.
209 // Main thread stack and DSOs at 0x7f0000000000 (sometimes 0x7e0000000000).
210 // Heap at 0x600000000000.
211 const MappingDesc kMemoryLayout[] = {
212     {0x000000000000ULL, 0x200000000000ULL, MappingDesc::INVALID, "invalid"},
213     {0x200000000000ULL, 0x400000000000ULL, MappingDesc::SHADOW, "shadow"},
214     {0x400000000000ULL, 0x600000000000ULL, MappingDesc::ORIGIN, "origin"},
215     {0x600000000000ULL, 0x800000000000ULL, MappingDesc::APP, "app"}};
216 
217 #define MEM_TO_SHADOW(mem) (((uptr)(mem)) & ~0x400000000000ULL)
218 #define SHADOW_TO_ORIGIN(mem) (((uptr)(mem)) + 0x200000000000ULL)
219 #else  // MSAN_LINUX_X86_64_OLD_MAPPING
220 // All of the following configurations are supported.
221 // ASLR disabled: main executable and DSOs at 0x555550000000
222 // PIE and ASLR: main executable and DSOs at 0x7f0000000000
223 // non-PIE: main executable below 0x100000000, DSOs at 0x7f0000000000
224 // Heap at 0x700000000000.
225 const MappingDesc kMemoryLayout[] = {
226     {0x000000000000ULL, 0x010000000000ULL, MappingDesc::APP, "app-1"},
227     {0x010000000000ULL, 0x100000000000ULL, MappingDesc::SHADOW, "shadow-2"},
228     {0x100000000000ULL, 0x110000000000ULL, MappingDesc::INVALID, "invalid"},
229     {0x110000000000ULL, 0x200000000000ULL, MappingDesc::ORIGIN, "origin-2"},
230     {0x200000000000ULL, 0x300000000000ULL, MappingDesc::SHADOW, "shadow-3"},
231     {0x300000000000ULL, 0x400000000000ULL, MappingDesc::ORIGIN, "origin-3"},
232     {0x400000000000ULL, 0x500000000000ULL, MappingDesc::INVALID, "invalid"},
233     {0x500000000000ULL, 0x510000000000ULL, MappingDesc::SHADOW, "shadow-1"},
234     {0x510000000000ULL, 0x600000000000ULL, MappingDesc::APP, "app-2"},
235     {0x600000000000ULL, 0x610000000000ULL, MappingDesc::ORIGIN, "origin-1"},
236     {0x610000000000ULL, 0x700000000000ULL, MappingDesc::INVALID, "invalid"},
237     {0x700000000000ULL, 0x800000000000ULL, MappingDesc::APP, "app-3"}};
238 #define MEM_TO_SHADOW(mem) (((uptr)(mem)) ^ 0x500000000000ULL)
239 #define SHADOW_TO_ORIGIN(mem) (((uptr)(mem)) + 0x100000000000ULL)
240 #endif  // MSAN_LINUX_X86_64_OLD_MAPPING
241 
242 #else
243 #error "Unsupported platform"
244 #endif
245 
246 const uptr kMemoryLayoutSize = sizeof(kMemoryLayout) / sizeof(kMemoryLayout[0]);
247 
248 #define MEM_TO_ORIGIN(mem) (SHADOW_TO_ORIGIN(MEM_TO_SHADOW((mem))))
249 
250 #ifndef __clang__
251 __attribute__((optimize("unroll-loops")))
252 #endif
253 inline bool addr_is_type(uptr addr, MappingDesc::Type mapping_type) {
254 // It is critical for performance that this loop is unrolled (because then it is
255 // simplified into just a few constant comparisons).
256 #ifdef __clang__
257 #pragma unroll
258 #endif
259   for (unsigned i = 0; i < kMemoryLayoutSize; ++i)
260     if (kMemoryLayout[i].type == mapping_type &&
261         addr >= kMemoryLayout[i].start && addr < kMemoryLayout[i].end)
262       return true;
263   return false;
264 }
265 
266 #define MEM_IS_APP(mem) addr_is_type((uptr)(mem), MappingDesc::APP)
267 #define MEM_IS_SHADOW(mem) addr_is_type((uptr)(mem), MappingDesc::SHADOW)
268 #define MEM_IS_ORIGIN(mem) addr_is_type((uptr)(mem), MappingDesc::ORIGIN)
269 
270 // These constants must be kept in sync with the ones in MemorySanitizer.cpp.
271 const int kMsanParamTlsSize = 800;
272 const int kMsanRetvalTlsSize = 800;
273 
274 namespace __msan {
275 extern int msan_inited;
276 extern bool msan_init_is_running;
277 extern int msan_report_count;
278 
279 bool ProtectRange(uptr beg, uptr end);
280 bool InitShadow(bool init_origins);
281 char *GetProcSelfMaps();
282 void InitializeInterceptors();
283 
284 void MsanAllocatorInit();
285 void MsanAllocatorThreadFinish();
286 void MsanDeallocate(StackTrace *stack, void *ptr);
287 
288 void *msan_malloc(uptr size, StackTrace *stack);
289 void *msan_calloc(uptr nmemb, uptr size, StackTrace *stack);
290 void *msan_realloc(void *ptr, uptr size, StackTrace *stack);
291 void *msan_reallocarray(void *ptr, uptr nmemb, uptr size, StackTrace *stack);
292 void *msan_valloc(uptr size, StackTrace *stack);
293 void *msan_pvalloc(uptr size, StackTrace *stack);
294 void *msan_aligned_alloc(uptr alignment, uptr size, StackTrace *stack);
295 void *msan_memalign(uptr alignment, uptr size, StackTrace *stack);
296 int msan_posix_memalign(void **memptr, uptr alignment, uptr size,
297                         StackTrace *stack);
298 
299 void InstallTrapHandler();
300 void InstallAtExitHandler();
301 
302 const char *GetStackOriginDescr(u32 id, uptr *pc);
303 
304 void EnterSymbolizer();
305 void ExitSymbolizer();
306 bool IsInSymbolizer();
307 
308 struct SymbolizerScope {
309   SymbolizerScope() { EnterSymbolizer(); }
310   ~SymbolizerScope() { ExitSymbolizer(); }
311 };
312 
313 void PrintWarning(uptr pc, uptr bp);
314 void PrintWarningWithOrigin(uptr pc, uptr bp, u32 origin);
315 
316 // Unpoison first n function arguments.
317 void UnpoisonParam(uptr n);
318 void UnpoisonThreadLocalState();
319 
320 // Returns a "chained" origin id, pointing to the given stack trace followed by
321 // the previous origin id.
322 u32 ChainOrigin(u32 id, StackTrace *stack);
323 
324 const int STACK_TRACE_TAG_POISON = StackTrace::TAG_CUSTOM + 1;
325 
326 #define GET_MALLOC_STACK_TRACE                                            \
327   BufferedStackTrace stack;                                               \
328   if (__msan_get_track_origins() && msan_inited)                          \
329     stack.Unwind(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME(),         \
330                  nullptr, common_flags()->fast_unwind_on_malloc,          \
331                  common_flags()->malloc_context_size)
332 
333 // For platforms which support slow unwinder only, we restrict the store context
334 // size to 1, basically only storing the current pc. We do this because the slow
335 // unwinder which is based on libunwind is not async signal safe and causes
336 // random freezes in forking applications as well as in signal handlers.
337 #define GET_STORE_STACK_TRACE_PC_BP(pc, bp)                                    \
338   BufferedStackTrace stack;                                                    \
339   if (__msan_get_track_origins() > 1 && msan_inited) {                         \
340     int size = flags()->store_context_size;                                    \
341     if (!SANITIZER_CAN_FAST_UNWIND)                                            \
342       size = Min(size, 1);                                                     \
343     stack.Unwind(pc, bp, nullptr, common_flags()->fast_unwind_on_malloc, size);\
344   }
345 
346 #define GET_STORE_STACK_TRACE \
347   GET_STORE_STACK_TRACE_PC_BP(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME())
348 
349 #define GET_FATAL_STACK_TRACE_PC_BP(pc, bp)                              \
350   BufferedStackTrace stack;                                              \
351   if (msan_inited) {                                                     \
352     stack.Unwind(pc, bp, nullptr, common_flags()->fast_unwind_on_fatal); \
353   }
354 
355 #define GET_FATAL_STACK_TRACE_HERE \
356   GET_FATAL_STACK_TRACE_PC_BP(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME())
357 
358 #define PRINT_CURRENT_STACK_CHECK() \
359   {                                 \
360     GET_FATAL_STACK_TRACE_HERE;     \
361     stack.Print();                  \
362   }
363 
364 class ScopedThreadLocalStateBackup {
365  public:
366   ScopedThreadLocalStateBackup() { Backup(); }
367   ~ScopedThreadLocalStateBackup() { Restore(); }
368   void Backup();
369   void Restore();
370  private:
371   u64 va_arg_overflow_size_tls;
372 };
373 
374 void MsanTSDInit(void (*destructor)(void *tsd));
375 void *MsanTSDGet();
376 void MsanTSDSet(void *tsd);
377 void MsanTSDDtor(void *tsd);
378 
379 }  // namespace __msan
380 
381 #define MSAN_MALLOC_HOOK(ptr, size)       \
382   do {                                    \
383     if (&__sanitizer_malloc_hook) {       \
384       UnpoisonParam(2);                   \
385       __sanitizer_malloc_hook(ptr, size); \
386     }                                     \
387     RunMallocHooks(ptr, size);            \
388   } while (false)
389 #define MSAN_FREE_HOOK(ptr)       \
390   do {                            \
391     if (&__sanitizer_free_hook) { \
392       UnpoisonParam(1);           \
393       __sanitizer_free_hook(ptr); \
394     }                             \
395     RunFreeHooks(ptr);            \
396   } while (false)
397 
398 #endif  // MSAN_H
399