contrib/compiler-rt/lib/msan/msan.h

   1 //===-- msan.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 MemorySanitizer.
  11 //
  12 // Private MSan header.
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef MSAN_H
  16 #define MSAN_H
  17
  18 #include "sanitizer_common/sanitizer_flags.h"
  19 #include "sanitizer_common/sanitizer_internal_defs.h"
  20 #include "sanitizer_common/sanitizer_stacktrace.h"
  21 #include "msan_interface_internal.h"
  22 #include "msan_flags.h"
  23 #include "ubsan/ubsan_platform.h"
  24
  25 #ifndef MSAN_REPLACE_OPERATORS_NEW_AND_DELETE
  26 # define MSAN_REPLACE_OPERATORS_NEW_AND_DELETE 1
  27 #endif
  28
  29 #ifndef MSAN_CONTAINS_UBSAN
  30 # define MSAN_CONTAINS_UBSAN CAN_SANITIZE_UB
  31 #endif
  32
  33 struct MappingDesc {
  34   uptr start;
  35   uptr end;
  36   enum Type {
  37     INVALID, APP, SHADOW, ORIGIN
  38   } type;
  39   const char *name;
  40 };
  41
  42
  43 #if SANITIZER_LINUX && defined(__mips64)
  44
  45 // MIPS64 maps:
  46 // - 0x0000000000-0x0200000000: Program own segments
  47 // - 0xa200000000-0xc000000000: PIE program segments
  48 // - 0xe200000000-0xffffffffff: libraries segments.
  49 const MappingDesc kMemoryLayout[] = {
  50     {0x000000000000ULL, 0x000200000000ULL, MappingDesc::APP, "app-1"},
  51     {0x000200000000ULL, 0x002200000000ULL, MappingDesc::INVALID, "invalid"},
  52     {0x002200000000ULL, 0x004000000000ULL, MappingDesc::SHADOW, "shadow-2"},
  53     {0x004000000000ULL, 0x004200000000ULL, MappingDesc::INVALID, "invalid"},
  54     {0x004200000000ULL, 0x006000000000ULL, MappingDesc::ORIGIN, "origin-2"},
  55     {0x006000000000ULL, 0x006200000000ULL, MappingDesc::INVALID, "invalid"},
  56     {0x006200000000ULL, 0x008000000000ULL, MappingDesc::SHADOW, "shadow-3"},
  57     {0x008000000000ULL, 0x008200000000ULL, MappingDesc::SHADOW, "shadow-1"},
  58     {0x008200000000ULL, 0x00a000000000ULL, MappingDesc::ORIGIN, "origin-3"},
  59     {0x00a000000000ULL, 0x00a200000000ULL, MappingDesc::ORIGIN, "origin-1"},
  60     {0x00a200000000ULL, 0x00c000000000ULL, MappingDesc::APP, "app-2"},
  61     {0x00c000000000ULL, 0x00e200000000ULL, MappingDesc::INVALID, "invalid"},
  62     {0x00e200000000ULL, 0x00ffffffffffULL, MappingDesc::APP, "app-3"}};
  63
  64 #define MEM_TO_SHADOW(mem) (((uptr)(mem)) ^ 0x8000000000ULL)
  65 #define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x2000000000ULL)
  66
  67 #elif SANITIZER_LINUX && defined(__aarch64__)
  68
  69 // The mapping describes both 39-bits, 42-bits, and 48-bits VMA.  AArch64
  70 // maps:
  71 // - 0x0000000000000-0x0000010000000: 39/42/48-bits program own segments
  72 // - 0x0005500000000-0x0005600000000: 39-bits PIE program segments
  73 // - 0x0007f80000000-0x0007fffffffff: 39-bits libraries segments
  74 // - 0x002aa00000000-0x002ab00000000: 42-bits PIE program segments
  75 // - 0x003ff00000000-0x003ffffffffff: 42-bits libraries segments
  76 // - 0x0aaaaa0000000-0x0aaab00000000: 48-bits PIE program segments
  77 // - 0xffff000000000-0x1000000000000: 48-bits libraries segments
  78 // It is fragmented in multiples segments to increase the memory available
  79 // on 42-bits (12.21% of total VMA available for 42-bits and 13.28 for
  80 // 39 bits). The 48-bits segments only cover the usual PIE/default segments
  81 // plus some more segments (262144GB total, 0.39% total VMA).
  82 const MappingDesc kMemoryLayout[] = {
  83     {0x00000000000ULL, 0x01000000000ULL, MappingDesc::INVALID, "invalid"},
  84     {0x01000000000ULL, 0x02000000000ULL, MappingDesc::SHADOW, "shadow-2"},
  85     {0x02000000000ULL, 0x03000000000ULL, MappingDesc::ORIGIN, "origin-2"},
  86     {0x03000000000ULL, 0x04000000000ULL, MappingDesc::SHADOW, "shadow-1"},
  87     {0x04000000000ULL, 0x05000000000ULL, MappingDesc::ORIGIN, "origin-1"},
  88     {0x05000000000ULL, 0x06000000000ULL, MappingDesc::APP, "app-1"},
  89     {0x06000000000ULL, 0x07000000000ULL, MappingDesc::INVALID, "invalid"},
  90     {0x07000000000ULL, 0x08000000000ULL, MappingDesc::APP, "app-2"},
  91     {0x08000000000ULL, 0x09000000000ULL, MappingDesc::INVALID, "invalid"},
  92     // The mappings below are used only for 42-bits VMA.
  93     {0x09000000000ULL, 0x0A000000000ULL, MappingDesc::SHADOW, "shadow-3"},
  94     {0x0A000000000ULL, 0x0B000000000ULL, MappingDesc::ORIGIN, "origin-3"},
  95     {0x0B000000000ULL, 0x0F000000000ULL, MappingDesc::INVALID, "invalid"},
  96     {0x0F000000000ULL, 0x10000000000ULL, MappingDesc::APP, "app-3"},
  97     {0x10000000000ULL, 0x11000000000ULL, MappingDesc::INVALID, "invalid"},
  98     {0x11000000000ULL, 0x12000000000ULL, MappingDesc::APP, "app-4"},
  99     {0x12000000000ULL, 0x17000000000ULL, MappingDesc::INVALID, "invalid"},
 100     {0x17000000000ULL, 0x18000000000ULL, MappingDesc::SHADOW, "shadow-4"},
 101     {0x18000000000ULL, 0x19000000000ULL, MappingDesc::ORIGIN, "origin-4"},
 102     {0x19000000000ULL, 0x20000000000ULL, MappingDesc::INVALID, "invalid"},
 103     {0x20000000000ULL, 0x21000000000ULL, MappingDesc::APP, "app-5"},
 104     {0x21000000000ULL, 0x26000000000ULL, MappingDesc::INVALID, "invalid"},
 105     {0x26000000000ULL, 0x27000000000ULL, MappingDesc::SHADOW, "shadow-5"},
 106     {0x27000000000ULL, 0x28000000000ULL, MappingDesc::ORIGIN, "origin-5"},
 107     {0x28000000000ULL, 0x29000000000ULL, MappingDesc::SHADOW, "shadow-7"},
 108     {0x29000000000ULL, 0x2A000000000ULL, MappingDesc::ORIGIN, "origin-7"},
 109     {0x2A000000000ULL, 0x2B000000000ULL, MappingDesc::APP, "app-6"},
 110     {0x2B000000000ULL, 0x2C000000000ULL, MappingDesc::INVALID, "invalid"},
 111     {0x2C000000000ULL, 0x2D000000000ULL, MappingDesc::SHADOW, "shadow-6"},
 112     {0x2D000000000ULL, 0x2E000000000ULL, MappingDesc::ORIGIN, "origin-6"},
 113     {0x2E000000000ULL, 0x2F000000000ULL, MappingDesc::APP, "app-7"},
 114     {0x2F000000000ULL, 0x39000000000ULL, MappingDesc::INVALID, "invalid"},
 115     {0x39000000000ULL, 0x3A000000000ULL, MappingDesc::SHADOW, "shadow-9"},
 116     {0x3A000000000ULL, 0x3B000000000ULL, MappingDesc::ORIGIN, "origin-9"},
 117     {0x3B000000000ULL, 0x3C000000000ULL, MappingDesc::APP, "app-8"},
 118     {0x3C000000000ULL, 0x3D000000000ULL, MappingDesc::INVALID, "invalid"},
 119     {0x3D000000000ULL, 0x3E000000000ULL, MappingDesc::SHADOW, "shadow-8"},
 120     {0x3E000000000ULL, 0x3F000000000ULL, MappingDesc::ORIGIN, "origin-8"},
 121     {0x3F000000000ULL, 0x40000000000ULL, MappingDesc::APP, "app-9"},
 122     // The mappings below are used only for 48-bits VMA.
 123     // TODO(unknown): 48-bit mapping ony covers the usual PIE, non-PIE
 124     // segments and some more segments totalizing 262144GB of VMA (which cover
 125     // only 0.32% of all 48-bit VMA). Memory avaliability can be increase by
 126     // adding multiple application segments like 39 and 42 mapping.
 127     {0x0040000000000ULL, 0x0041000000000ULL, MappingDesc::INVALID, "invalid"},
 128     {0x0041000000000ULL, 0x0042000000000ULL, MappingDesc::APP, "app-10"},
 129     {0x0042000000000ULL, 0x0047000000000ULL, MappingDesc::INVALID, "invalid"},
 130     {0x0047000000000ULL, 0x0048000000000ULL, MappingDesc::SHADOW, "shadow-10"},
 131     {0x0048000000000ULL, 0x0049000000000ULL, MappingDesc::ORIGIN, "origin-10"},
 132     {0x0049000000000ULL, 0x0050000000000ULL, MappingDesc::INVALID, "invalid"},
 133     {0x0050000000000ULL, 0x0051000000000ULL, MappingDesc::APP, "app-11"},
 134     {0x0051000000000ULL, 0x0056000000000ULL, MappingDesc::INVALID, "invalid"},
 135     {0x0056000000000ULL, 0x0057000000000ULL, MappingDesc::SHADOW, "shadow-11"},
 136     {0x0057000000000ULL, 0x0058000000000ULL, MappingDesc::ORIGIN, "origin-11"},
 137     {0x0058000000000ULL, 0x0059000000000ULL, MappingDesc::APP, "app-12"},
 138     {0x0059000000000ULL, 0x005E000000000ULL, MappingDesc::INVALID, "invalid"},
 139     {0x005E000000000ULL, 0x005F000000000ULL, MappingDesc::SHADOW, "shadow-12"},
 140     {0x005F000000000ULL, 0x0060000000000ULL, MappingDesc::ORIGIN, "origin-12"},
 141     {0x0060000000000ULL, 0x0061000000000ULL, MappingDesc::INVALID, "invalid"},
 142     {0x0061000000000ULL, 0x0062000000000ULL, MappingDesc::APP, "app-13"},
 143     {0x0062000000000ULL, 0x0067000000000ULL, MappingDesc::INVALID, "invalid"},
 144     {0x0067000000000ULL, 0x0068000000000ULL, MappingDesc::SHADOW, "shadow-13"},
 145     {0x0068000000000ULL, 0x0069000000000ULL, MappingDesc::ORIGIN, "origin-13"},
 146     {0x0069000000000ULL, 0x0AAAAA0000000ULL, MappingDesc::INVALID, "invalid"},
 147     {0x0AAAAA0000000ULL, 0x0AAAB00000000ULL, MappingDesc::APP, "app-14"},
 148     {0x0AAAB00000000ULL, 0x0AACAA0000000ULL, MappingDesc::INVALID, "invalid"},
 149     {0x0AACAA0000000ULL, 0x0AACB00000000ULL, MappingDesc::SHADOW, "shadow-14"},
 150     {0x0AACB00000000ULL, 0x0AADAA0000000ULL, MappingDesc::INVALID, "invalid"},
 151     {0x0AADAA0000000ULL, 0x0AADB00000000ULL, MappingDesc::ORIGIN, "origin-14"},
 152     {0x0AADB00000000ULL, 0x0FF9F00000000ULL, MappingDesc::INVALID, "invalid"},
 153     {0x0FF9F00000000ULL, 0x0FFA000000000ULL, MappingDesc::SHADOW, "shadow-15"},
 154     {0x0FFA000000000ULL, 0x0FFAF00000000ULL, MappingDesc::INVALID, "invalid"},
 155     {0x0FFAF00000000ULL, 0x0FFB000000000ULL, MappingDesc::ORIGIN, "origin-15"},
 156     {0x0FFB000000000ULL, 0x0FFFF00000000ULL, MappingDesc::INVALID, "invalid"},
 157     {0x0FFFF00000000ULL, 0x1000000000000ULL, MappingDesc::APP, "app-15"},
 158 };
 159 # define MEM_TO_SHADOW(mem) ((uptr)mem ^ 0x6000000000ULL)
 160 # define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x1000000000ULL)
 161
 162 #elif SANITIZER_LINUX && SANITIZER_PPC64
 163
 164 const MappingDesc kMemoryLayout[] = {
 165     {0x000000000000ULL, 0x000100000000ULL, MappingDesc::APP, "low memory"},
 166     {0x000100000000ULL, 0x080000000000ULL, MappingDesc::INVALID, "invalid"},
 167     {0x080000000000ULL, 0x180100000000ULL, MappingDesc::SHADOW, "shadow"},
 168     {0x180100000000ULL, 0x1C0000000000ULL, MappingDesc::INVALID, "invalid"},
 169     {0x1C0000000000ULL, 0x2C0100000000ULL, MappingDesc::ORIGIN, "origin"},
 170     {0x2C0100000000ULL, 0x300000000000ULL, MappingDesc::INVALID, "invalid"},
 171     {0x300000000000ULL, 0x400000000000ULL, MappingDesc::APP, "high memory"}};
 172
 173 // Maps low and high app ranges to contiguous space with zero base:
 174 //   Low:  0000 0000 0000 - 0000 ffff ffff  ->  1000 0000 0000 - 1000 ffff ffff
 175 //   High: 3000 0000 0000 - 3fff ffff ffff  ->  0000 0000 0000 - 0fff ffff ffff
 176 #define LINEARIZE_MEM(mem) \
 177   (((uptr)(mem) & ~0x200000000000ULL) ^ 0x100000000000ULL)
 178 #define MEM_TO_SHADOW(mem) (LINEARIZE_MEM((mem)) + 0x080000000000ULL)
 179 #define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x140000000000ULL)
 180
 181 #elif SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 64
 182
 183 // Low memory: main binary, MAP_32BIT mappings and modules
 184 // High memory: heap, modules and main thread stack
 185 const MappingDesc kMemoryLayout[] = {
 186     {0x000000000000ULL, 0x010000000000ULL, MappingDesc::APP, "low memory"},
 187     {0x010000000000ULL, 0x100000000000ULL, MappingDesc::INVALID, "invalid"},
 188     {0x100000000000ULL, 0x310000000000ULL, MappingDesc::SHADOW, "shadow"},
 189     {0x310000000000ULL, 0x380000000000ULL, MappingDesc::INVALID, "invalid"},
 190     {0x380000000000ULL, 0x590000000000ULL, MappingDesc::ORIGIN, "origin"},
 191     {0x590000000000ULL, 0x600000000000ULL, MappingDesc::INVALID, "invalid"},
 192     {0x600000000000ULL, 0x800000000000ULL, MappingDesc::APP, "high memory"}};
 193
 194 // Maps low and high app ranges to contiguous space with zero base:
 195 //   Low:  0000 0000 0000 - 00ff ffff ffff  ->  2000 0000 0000 - 20ff ffff ffff
 196 //   High: 6000 0000 0000 - 7fff ffff ffff  ->  0000 0000 0000 - 1fff ffff ffff
 197 #define LINEARIZE_MEM(mem) \
 198   (((uptr)(mem) & ~0xc00000000000ULL) ^ 0x200000000000ULL)
 199 #define MEM_TO_SHADOW(mem) (LINEARIZE_MEM((mem)) + 0x100000000000ULL)
 200 #define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x280000000000)
 201
 202 #elif SANITIZER_LINUX && SANITIZER_WORDSIZE == 64
 203
 204 #ifdef MSAN_LINUX_X86_64_OLD_MAPPING
 205 // Requries PIE binary and ASLR enabled.
 206 // Main thread stack and DSOs at 0x7f0000000000 (sometimes 0x7e0000000000).
 207 // Heap at 0x600000000000.
 208 const MappingDesc kMemoryLayout[] = {
 209     {0x000000000000ULL, 0x200000000000ULL, MappingDesc::INVALID, "invalid"},
 210     {0x200000000000ULL, 0x400000000000ULL, MappingDesc::SHADOW, "shadow"},
 211     {0x400000000000ULL, 0x600000000000ULL, MappingDesc::ORIGIN, "origin"},
 212     {0x600000000000ULL, 0x800000000000ULL, MappingDesc::APP, "app"}};
 213
 214 #define MEM_TO_SHADOW(mem) (((uptr)(mem)) & ~0x400000000000ULL)
 215 #define SHADOW_TO_ORIGIN(mem) (((uptr)(mem)) + 0x200000000000ULL)
 216 #else  // MSAN_LINUX_X86_64_OLD_MAPPING
 217 // All of the following configurations are supported.
 218 // ASLR disabled: main executable and DSOs at 0x555550000000
 219 // PIE and ASLR: main executable and DSOs at 0x7f0000000000
 220 // non-PIE: main executable below 0x100000000, DSOs at 0x7f0000000000
 221 // Heap at 0x700000000000.
 222 const MappingDesc kMemoryLayout[] = {
 223     {0x000000000000ULL, 0x010000000000ULL, MappingDesc::APP, "app-1"},
 224     {0x010000000000ULL, 0x100000000000ULL, MappingDesc::SHADOW, "shadow-2"},
 225     {0x100000000000ULL, 0x110000000000ULL, MappingDesc::INVALID, "invalid"},
 226     {0x110000000000ULL, 0x200000000000ULL, MappingDesc::ORIGIN, "origin-2"},
 227     {0x200000000000ULL, 0x300000000000ULL, MappingDesc::SHADOW, "shadow-3"},
 228     {0x300000000000ULL, 0x400000000000ULL, MappingDesc::ORIGIN, "origin-3"},
 229     {0x400000000000ULL, 0x500000000000ULL, MappingDesc::INVALID, "invalid"},
 230     {0x500000000000ULL, 0x510000000000ULL, MappingDesc::SHADOW, "shadow-1"},
 231     {0x510000000000ULL, 0x600000000000ULL, MappingDesc::APP, "app-2"},
 232     {0x600000000000ULL, 0x610000000000ULL, MappingDesc::ORIGIN, "origin-1"},
 233     {0x610000000000ULL, 0x700000000000ULL, MappingDesc::INVALID, "invalid"},
 234     {0x700000000000ULL, 0x800000000000ULL, MappingDesc::APP, "app-3"}};
 235 #define MEM_TO_SHADOW(mem) (((uptr)(mem)) ^ 0x500000000000ULL)
 236 #define SHADOW_TO_ORIGIN(mem) (((uptr)(mem)) + 0x100000000000ULL)
 237 #endif  // MSAN_LINUX_X86_64_OLD_MAPPING
 238
 239 #else
 240 #error "Unsupported platform"
 241 #endif
 242
 243 const uptr kMemoryLayoutSize = sizeof(kMemoryLayout) / sizeof(kMemoryLayout[0]);
 244
 245 #define MEM_TO_ORIGIN(mem) (SHADOW_TO_ORIGIN(MEM_TO_SHADOW((mem))))
 246
 247 #ifndef __clang__
 248 __attribute__((optimize("unroll-loops")))
 249 #endif
 250 inline bool addr_is_type(uptr addr, MappingDesc::Type mapping_type) {
 251 // It is critical for performance that this loop is unrolled (because then it is
 252 // simplified into just a few constant comparisons).
 253 #ifdef __clang__
 254 #pragma unroll
 255 #endif
 256   for (unsigned i = 0; i < kMemoryLayoutSize; ++i)
 257     if (kMemoryLayout[i].type == mapping_type &&
 258         addr >= kMemoryLayout[i].start && addr < kMemoryLayout[i].end)
 259       return true;
 260   return false;
 261 }
 262
 263 #define MEM_IS_APP(mem) addr_is_type((uptr)(mem), MappingDesc::APP)
 264 #define MEM_IS_SHADOW(mem) addr_is_type((uptr)(mem), MappingDesc::SHADOW)
 265 #define MEM_IS_ORIGIN(mem) addr_is_type((uptr)(mem), MappingDesc::ORIGIN)
 266
 267 // These constants must be kept in sync with the ones in MemorySanitizer.cc.
 268 const int kMsanParamTlsSize = 800;
 269 const int kMsanRetvalTlsSize = 800;
 270
 271 namespace __msan {
 272 extern int msan_inited;
 273 extern bool msan_init_is_running;
 274 extern int msan_report_count;
 275
 276 bool ProtectRange(uptr beg, uptr end);
 277 bool InitShadow(bool init_origins);
 278 char *GetProcSelfMaps();
 279 void InitializeInterceptors();
 280
 281 void MsanAllocatorInit();
 282 void MsanAllocatorThreadFinish();
 283 void MsanDeallocate(StackTrace *stack, void *ptr);
 284
 285 void *msan_malloc(uptr size, StackTrace *stack);
 286 void *msan_calloc(uptr nmemb, uptr size, StackTrace *stack);
 287 void *msan_realloc(void *ptr, uptr size, StackTrace *stack);
 288 void *msan_valloc(uptr size, StackTrace *stack);
 289 void *msan_pvalloc(uptr size, StackTrace *stack);
 290 void *msan_aligned_alloc(uptr alignment, uptr size, StackTrace *stack);
 291 void *msan_memalign(uptr alignment, uptr size, StackTrace *stack);
 292 int msan_posix_memalign(void **memptr, uptr alignment, uptr size,
 293                         StackTrace *stack);
 294
 295 void InstallTrapHandler();
 296 void InstallAtExitHandler();
 297
 298 const char *GetStackOriginDescr(u32 id, uptr *pc);
 299
 300 void EnterSymbolizer();
 301 void ExitSymbolizer();
 302 bool IsInSymbolizer();
 303
 304 struct SymbolizerScope {
 305   SymbolizerScope() { EnterSymbolizer(); }
 306   ~SymbolizerScope() { ExitSymbolizer(); }
 307 };
 308
 309 void PrintWarning(uptr pc, uptr bp);
 310 void PrintWarningWithOrigin(uptr pc, uptr bp, u32 origin);
 311
 312 void GetStackTrace(BufferedStackTrace *stack, uptr max_s, uptr pc, uptr bp,
 313                    bool request_fast_unwind);
 314
 315 void ReportUMR(StackTrace *stack, u32 origin);
 316 void ReportExpectedUMRNotFound(StackTrace *stack);
 317 void ReportStats();
 318 void ReportAtExitStatistics();
 319 void DescribeMemoryRange(const void *x, uptr size);
 320 void ReportUMRInsideAddressRange(const char *what, const void *start, uptr size,
 321                                  uptr offset);
 322
 323 // Unpoison first n function arguments.
 324 void UnpoisonParam(uptr n);
 325 void UnpoisonThreadLocalState();
 326
 327 // Returns a "chained" origin id, pointing to the given stack trace followed by
 328 // the previous origin id.
 329 u32 ChainOrigin(u32 id, StackTrace *stack);
 330
 331 const int STACK_TRACE_TAG_POISON = StackTrace::TAG_CUSTOM + 1;
 332
 333 #define GET_MALLOC_STACK_TRACE                                                 \
 334   BufferedStackTrace stack;                                                    \
 335   if (__msan_get_track_origins() && msan_inited)                               \
 336   GetStackTrace(&stack, common_flags()->malloc_context_size,                   \
 337                 StackTrace::GetCurrentPc(), GET_CURRENT_FRAME(),               \
 338                 common_flags()->fast_unwind_on_malloc)
 339
 340 // For platforms which support slow unwinder only, we restrict the store context
 341 // size to 1, basically only storing the current pc. We do this because the slow
 342 // unwinder which is based on libunwind is not async signal safe and causes
 343 // random freezes in forking applications as well as in signal handlers.
 344 #define GET_STORE_STACK_TRACE_PC_BP(pc, bp)                                    \
 345   BufferedStackTrace stack;                                                    \
 346   if (__msan_get_track_origins() > 1 && msan_inited) {                         \
 347     if (!SANITIZER_CAN_FAST_UNWIND)                                            \
 348       GetStackTrace(&stack, Min(1, flags()->store_context_size), pc, bp,       \
 349                     false);                                                    \
 350     else                                                                       \
 351       GetStackTrace(&stack, flags()->store_context_size, pc, bp,               \
 352                     common_flags()->fast_unwind_on_malloc);                    \
 353   }
 354
 355 #define GET_FATAL_STACK_TRACE_PC_BP(pc, bp)                                    \
 356   BufferedStackTrace stack;                                                    \
 357   if (msan_inited)                                                             \
 358   GetStackTrace(&stack, kStackTraceMax, pc, bp,                                \
 359                 common_flags()->fast_unwind_on_fatal)
 360
 361 #define GET_STORE_STACK_TRACE \
 362   GET_STORE_STACK_TRACE_PC_BP(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME())
 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