10b57cec5SDimitry Andric //===-- msan.h --------------------------------------------------*- C++ -*-===// 20b57cec5SDimitry Andric // 30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric // 70b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 80b57cec5SDimitry Andric // 90b57cec5SDimitry Andric // This file is a part of MemorySanitizer. 100b57cec5SDimitry Andric // 110b57cec5SDimitry Andric // Private MSan header. 120b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 130b57cec5SDimitry Andric 140b57cec5SDimitry Andric #ifndef MSAN_H 150b57cec5SDimitry Andric #define MSAN_H 160b57cec5SDimitry Andric 170b57cec5SDimitry Andric #include "sanitizer_common/sanitizer_flags.h" 180b57cec5SDimitry Andric #include "sanitizer_common/sanitizer_internal_defs.h" 190b57cec5SDimitry Andric #include "sanitizer_common/sanitizer_stacktrace.h" 200b57cec5SDimitry Andric #include "msan_interface_internal.h" 210b57cec5SDimitry Andric #include "msan_flags.h" 220b57cec5SDimitry Andric #include "ubsan/ubsan_platform.h" 230b57cec5SDimitry Andric 240b57cec5SDimitry Andric #ifndef MSAN_REPLACE_OPERATORS_NEW_AND_DELETE 250b57cec5SDimitry Andric # define MSAN_REPLACE_OPERATORS_NEW_AND_DELETE 1 260b57cec5SDimitry Andric #endif 270b57cec5SDimitry Andric 280b57cec5SDimitry Andric #ifndef MSAN_CONTAINS_UBSAN 290b57cec5SDimitry Andric # define MSAN_CONTAINS_UBSAN CAN_SANITIZE_UB 300b57cec5SDimitry Andric #endif 310b57cec5SDimitry Andric 320b57cec5SDimitry Andric struct MappingDesc { 330b57cec5SDimitry Andric uptr start; 340b57cec5SDimitry Andric uptr end; 350b57cec5SDimitry Andric enum Type { 360b57cec5SDimitry Andric INVALID, APP, SHADOW, ORIGIN 370b57cec5SDimitry Andric } type; 380b57cec5SDimitry Andric const char *name; 390b57cec5SDimitry Andric }; 400b57cec5SDimitry Andric 410b57cec5SDimitry Andric 420b57cec5SDimitry Andric #if SANITIZER_LINUX && defined(__mips64) 430b57cec5SDimitry Andric 440b57cec5SDimitry Andric // MIPS64 maps: 450b57cec5SDimitry Andric // - 0x0000000000-0x0200000000: Program own segments 460b57cec5SDimitry Andric // - 0xa200000000-0xc000000000: PIE program segments 470b57cec5SDimitry Andric // - 0xe200000000-0xffffffffff: libraries segments. 480b57cec5SDimitry Andric const MappingDesc kMemoryLayout[] = { 490b57cec5SDimitry Andric {0x000000000000ULL, 0x000200000000ULL, MappingDesc::APP, "app-1"}, 500b57cec5SDimitry Andric {0x000200000000ULL, 0x002200000000ULL, MappingDesc::INVALID, "invalid"}, 510b57cec5SDimitry Andric {0x002200000000ULL, 0x004000000000ULL, MappingDesc::SHADOW, "shadow-2"}, 520b57cec5SDimitry Andric {0x004000000000ULL, 0x004200000000ULL, MappingDesc::INVALID, "invalid"}, 530b57cec5SDimitry Andric {0x004200000000ULL, 0x006000000000ULL, MappingDesc::ORIGIN, "origin-2"}, 540b57cec5SDimitry Andric {0x006000000000ULL, 0x006200000000ULL, MappingDesc::INVALID, "invalid"}, 550b57cec5SDimitry Andric {0x006200000000ULL, 0x008000000000ULL, MappingDesc::SHADOW, "shadow-3"}, 560b57cec5SDimitry Andric {0x008000000000ULL, 0x008200000000ULL, MappingDesc::SHADOW, "shadow-1"}, 570b57cec5SDimitry Andric {0x008200000000ULL, 0x00a000000000ULL, MappingDesc::ORIGIN, "origin-3"}, 580b57cec5SDimitry Andric {0x00a000000000ULL, 0x00a200000000ULL, MappingDesc::ORIGIN, "origin-1"}, 590b57cec5SDimitry Andric {0x00a200000000ULL, 0x00c000000000ULL, MappingDesc::APP, "app-2"}, 600b57cec5SDimitry Andric {0x00c000000000ULL, 0x00e200000000ULL, MappingDesc::INVALID, "invalid"}, 610b57cec5SDimitry Andric {0x00e200000000ULL, 0x00ffffffffffULL, MappingDesc::APP, "app-3"}}; 620b57cec5SDimitry Andric 630b57cec5SDimitry Andric #define MEM_TO_SHADOW(mem) (((uptr)(mem)) ^ 0x8000000000ULL) 640b57cec5SDimitry Andric #define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x2000000000ULL) 650b57cec5SDimitry Andric 660b57cec5SDimitry Andric #elif SANITIZER_LINUX && defined(__aarch64__) 670b57cec5SDimitry Andric 68bdd1243dSDimitry Andric // The mapping assumes 48-bit VMA. AArch64 maps: 69bdd1243dSDimitry Andric // - 0x0000000000000-0x0100000000000: 39/42/48-bits program own segments 70bdd1243dSDimitry Andric // - 0x0a00000000000-0x0b00000000000: 48-bits PIE program segments 71bdd1243dSDimitry Andric // Ideally, this would extend to 0x0c00000000000 (2^45 bytes - the 72bdd1243dSDimitry Andric // maximum ASLR region for 48-bit VMA) but it is too hard to fit in 73bdd1243dSDimitry Andric // the larger app/shadow/origin regions. 74bdd1243dSDimitry Andric // - 0x0e00000000000-0x1000000000000: 48-bits libraries segments 750b57cec5SDimitry Andric const MappingDesc kMemoryLayout[] = { 76bdd1243dSDimitry Andric {0X0000000000000, 0X0100000000000, MappingDesc::APP, "app-10-13"}, 77bdd1243dSDimitry Andric {0X0100000000000, 0X0200000000000, MappingDesc::SHADOW, "shadow-14"}, 78bdd1243dSDimitry Andric {0X0200000000000, 0X0300000000000, MappingDesc::INVALID, "invalid"}, 79bdd1243dSDimitry Andric {0X0300000000000, 0X0400000000000, MappingDesc::ORIGIN, "origin-14"}, 80bdd1243dSDimitry Andric {0X0400000000000, 0X0600000000000, MappingDesc::SHADOW, "shadow-15"}, 81bdd1243dSDimitry Andric {0X0600000000000, 0X0800000000000, MappingDesc::ORIGIN, "origin-15"}, 82bdd1243dSDimitry Andric {0X0800000000000, 0X0A00000000000, MappingDesc::INVALID, "invalid"}, 83bdd1243dSDimitry Andric {0X0A00000000000, 0X0B00000000000, MappingDesc::APP, "app-14"}, 84bdd1243dSDimitry Andric {0X0B00000000000, 0X0C00000000000, MappingDesc::SHADOW, "shadow-10-13"}, 85bdd1243dSDimitry Andric {0X0C00000000000, 0X0D00000000000, MappingDesc::INVALID, "invalid"}, 86bdd1243dSDimitry Andric {0X0D00000000000, 0X0E00000000000, MappingDesc::ORIGIN, "origin-10-13"}, 87bdd1243dSDimitry Andric {0X0E00000000000, 0X1000000000000, MappingDesc::APP, "app-15"}, 880b57cec5SDimitry Andric }; 89bdd1243dSDimitry Andric # define MEM_TO_SHADOW(mem) ((uptr)mem ^ 0xB00000000000ULL) 90bdd1243dSDimitry Andric # define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x200000000000ULL) 910b57cec5SDimitry Andric 920b57cec5SDimitry Andric #elif SANITIZER_LINUX && SANITIZER_PPC64 930b57cec5SDimitry Andric const MappingDesc kMemoryLayout[] = { 940b57cec5SDimitry Andric {0x000000000000ULL, 0x000200000000ULL, MappingDesc::APP, "low memory"}, 950b57cec5SDimitry Andric {0x000200000000ULL, 0x080000000000ULL, MappingDesc::INVALID, "invalid"}, 960b57cec5SDimitry Andric {0x080000000000ULL, 0x180200000000ULL, MappingDesc::SHADOW, "shadow"}, 970b57cec5SDimitry Andric {0x180200000000ULL, 0x1C0000000000ULL, MappingDesc::INVALID, "invalid"}, 980b57cec5SDimitry Andric {0x1C0000000000ULL, 0x2C0200000000ULL, MappingDesc::ORIGIN, "origin"}, 990b57cec5SDimitry Andric {0x2C0200000000ULL, 0x300000000000ULL, MappingDesc::INVALID, "invalid"}, 1000b57cec5SDimitry Andric {0x300000000000ULL, 0x800000000000ULL, MappingDesc::APP, "high memory"}}; 1010b57cec5SDimitry Andric 1020b57cec5SDimitry Andric // Various kernels use different low end ranges but we can combine them into one 1030b57cec5SDimitry Andric // big range. They also use different high end ranges but we can map them all to 1040b57cec5SDimitry Andric // one range. 1050b57cec5SDimitry Andric // Maps low and high app ranges to contiguous space with zero base: 1060b57cec5SDimitry Andric // Low: 0000 0000 0000 - 0001 ffff ffff -> 1000 0000 0000 - 1001 ffff ffff 1070b57cec5SDimitry Andric // High: 3000 0000 0000 - 3fff ffff ffff -> 0000 0000 0000 - 0fff ffff ffff 1080b57cec5SDimitry Andric // High: 4000 0000 0000 - 4fff ffff ffff -> 0000 0000 0000 - 0fff ffff ffff 1090b57cec5SDimitry Andric // High: 7000 0000 0000 - 7fff ffff ffff -> 0000 0000 0000 - 0fff ffff ffff 1100b57cec5SDimitry Andric #define LINEARIZE_MEM(mem) \ 1110b57cec5SDimitry Andric (((uptr)(mem) & ~0xE00000000000ULL) ^ 0x100000000000ULL) 1120b57cec5SDimitry Andric #define MEM_TO_SHADOW(mem) (LINEARIZE_MEM((mem)) + 0x080000000000ULL) 1130b57cec5SDimitry Andric #define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x140000000000ULL) 1140b57cec5SDimitry Andric 1155ffd83dbSDimitry Andric #elif SANITIZER_LINUX && SANITIZER_S390_64 1165ffd83dbSDimitry Andric const MappingDesc kMemoryLayout[] = { 1175ffd83dbSDimitry Andric {0x000000000000ULL, 0x040000000000ULL, MappingDesc::APP, "low memory"}, 1185ffd83dbSDimitry Andric {0x040000000000ULL, 0x080000000000ULL, MappingDesc::INVALID, "invalid"}, 1195ffd83dbSDimitry Andric {0x080000000000ULL, 0x180000000000ULL, MappingDesc::SHADOW, "shadow"}, 1205ffd83dbSDimitry Andric {0x180000000000ULL, 0x1C0000000000ULL, MappingDesc::INVALID, "invalid"}, 1215ffd83dbSDimitry Andric {0x1C0000000000ULL, 0x2C0000000000ULL, MappingDesc::ORIGIN, "origin"}, 1225ffd83dbSDimitry Andric {0x2C0000000000ULL, 0x440000000000ULL, MappingDesc::INVALID, "invalid"}, 1235ffd83dbSDimitry Andric {0x440000000000ULL, 0x500000000000ULL, MappingDesc::APP, "high memory"}}; 1245ffd83dbSDimitry Andric 1255ffd83dbSDimitry Andric #define MEM_TO_SHADOW(mem) \ 1265ffd83dbSDimitry Andric ((((uptr)(mem)) & ~0xC00000000000ULL) + 0x080000000000ULL) 1275ffd83dbSDimitry Andric #define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x140000000000ULL) 1285ffd83dbSDimitry Andric 129fcaf7f86SDimitry Andric #elif SANITIZER_FREEBSD && defined(__aarch64__) 130fcaf7f86SDimitry Andric 131fcaf7f86SDimitry Andric // Low memory: main binary, MAP_32BIT mappings and modules 132fcaf7f86SDimitry Andric // High memory: heap, modules and main thread stack 133fcaf7f86SDimitry Andric const MappingDesc kMemoryLayout[] = { 134fcaf7f86SDimitry Andric {0x000000000000ULL, 0x020000000000ULL, MappingDesc::APP, "low memory"}, 135fcaf7f86SDimitry Andric {0x020000000000ULL, 0x200000000000ULL, MappingDesc::INVALID, "invalid"}, 136fcaf7f86SDimitry Andric {0x200000000000ULL, 0x620000000000ULL, MappingDesc::SHADOW, "shadow"}, 137fcaf7f86SDimitry Andric {0x620000000000ULL, 0x700000000000ULL, MappingDesc::INVALID, "invalid"}, 138fcaf7f86SDimitry Andric {0x700000000000ULL, 0xb20000000000ULL, MappingDesc::ORIGIN, "origin"}, 139fcaf7f86SDimitry Andric {0xb20000000000ULL, 0xc00000000000ULL, MappingDesc::INVALID, "invalid"}, 140fcaf7f86SDimitry Andric {0xc00000000000ULL, 0x1000000000000ULL, MappingDesc::APP, "high memory"}}; 141fcaf7f86SDimitry Andric 142fcaf7f86SDimitry Andric // Maps low and high app ranges to contiguous space with zero base: 143fcaf7f86SDimitry Andric // Low: 0000 0000 0000 - 01ff ffff ffff -> 4000 0000 0000 - 41ff ffff ffff 144fcaf7f86SDimitry Andric // High: c000 0000 0000 - ffff ffff ffff -> 0000 0000 0000 - 3fff ffff ffff 145fcaf7f86SDimitry Andric #define LINEARIZE_MEM(mem) \ 146fcaf7f86SDimitry Andric (((uptr)(mem) & ~0x1800000000000ULL) ^ 0x400000000000ULL) 147fcaf7f86SDimitry Andric #define MEM_TO_SHADOW(mem) (LINEARIZE_MEM((mem)) + 0x200000000000ULL) 148fcaf7f86SDimitry Andric #define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x500000000000) 149fcaf7f86SDimitry Andric 1500b57cec5SDimitry Andric #elif SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 64 1510b57cec5SDimitry Andric 1520b57cec5SDimitry Andric // Low memory: main binary, MAP_32BIT mappings and modules 1530b57cec5SDimitry Andric // High memory: heap, modules and main thread stack 1540b57cec5SDimitry Andric const MappingDesc kMemoryLayout[] = { 1550b57cec5SDimitry Andric {0x000000000000ULL, 0x010000000000ULL, MappingDesc::APP, "low memory"}, 1560b57cec5SDimitry Andric {0x010000000000ULL, 0x100000000000ULL, MappingDesc::INVALID, "invalid"}, 1570b57cec5SDimitry Andric {0x100000000000ULL, 0x310000000000ULL, MappingDesc::SHADOW, "shadow"}, 1580b57cec5SDimitry Andric {0x310000000000ULL, 0x380000000000ULL, MappingDesc::INVALID, "invalid"}, 1590b57cec5SDimitry Andric {0x380000000000ULL, 0x590000000000ULL, MappingDesc::ORIGIN, "origin"}, 1600b57cec5SDimitry Andric {0x590000000000ULL, 0x600000000000ULL, MappingDesc::INVALID, "invalid"}, 1610b57cec5SDimitry Andric {0x600000000000ULL, 0x800000000000ULL, MappingDesc::APP, "high memory"}}; 1620b57cec5SDimitry Andric 1630b57cec5SDimitry Andric // Maps low and high app ranges to contiguous space with zero base: 1640b57cec5SDimitry Andric // Low: 0000 0000 0000 - 00ff ffff ffff -> 2000 0000 0000 - 20ff ffff ffff 1650b57cec5SDimitry Andric // High: 6000 0000 0000 - 7fff ffff ffff -> 0000 0000 0000 - 1fff ffff ffff 1660b57cec5SDimitry Andric #define LINEARIZE_MEM(mem) \ 1670b57cec5SDimitry Andric (((uptr)(mem) & ~0xc00000000000ULL) ^ 0x200000000000ULL) 1680b57cec5SDimitry Andric #define MEM_TO_SHADOW(mem) (LINEARIZE_MEM((mem)) + 0x100000000000ULL) 1690b57cec5SDimitry Andric #define SHADOW_TO_ORIGIN(shadow) (((uptr)(shadow)) + 0x280000000000) 1700b57cec5SDimitry Andric 1710b57cec5SDimitry Andric #elif SANITIZER_NETBSD || (SANITIZER_LINUX && SANITIZER_WORDSIZE == 64) 1720b57cec5SDimitry Andric 1730b57cec5SDimitry Andric // All of the following configurations are supported. 1740b57cec5SDimitry Andric // ASLR disabled: main executable and DSOs at 0x555550000000 1750b57cec5SDimitry Andric // PIE and ASLR: main executable and DSOs at 0x7f0000000000 1760b57cec5SDimitry Andric // non-PIE: main executable below 0x100000000, DSOs at 0x7f0000000000 1770b57cec5SDimitry Andric // Heap at 0x700000000000. 1780b57cec5SDimitry Andric const MappingDesc kMemoryLayout[] = { 1790b57cec5SDimitry Andric {0x000000000000ULL, 0x010000000000ULL, MappingDesc::APP, "app-1"}, 1800b57cec5SDimitry Andric {0x010000000000ULL, 0x100000000000ULL, MappingDesc::SHADOW, "shadow-2"}, 1810b57cec5SDimitry Andric {0x100000000000ULL, 0x110000000000ULL, MappingDesc::INVALID, "invalid"}, 1820b57cec5SDimitry Andric {0x110000000000ULL, 0x200000000000ULL, MappingDesc::ORIGIN, "origin-2"}, 1830b57cec5SDimitry Andric {0x200000000000ULL, 0x300000000000ULL, MappingDesc::SHADOW, "shadow-3"}, 1840b57cec5SDimitry Andric {0x300000000000ULL, 0x400000000000ULL, MappingDesc::ORIGIN, "origin-3"}, 1850b57cec5SDimitry Andric {0x400000000000ULL, 0x500000000000ULL, MappingDesc::INVALID, "invalid"}, 1860b57cec5SDimitry Andric {0x500000000000ULL, 0x510000000000ULL, MappingDesc::SHADOW, "shadow-1"}, 1870b57cec5SDimitry Andric {0x510000000000ULL, 0x600000000000ULL, MappingDesc::APP, "app-2"}, 1880b57cec5SDimitry Andric {0x600000000000ULL, 0x610000000000ULL, MappingDesc::ORIGIN, "origin-1"}, 1890b57cec5SDimitry Andric {0x610000000000ULL, 0x700000000000ULL, MappingDesc::INVALID, "invalid"}, 1900b57cec5SDimitry Andric {0x700000000000ULL, 0x800000000000ULL, MappingDesc::APP, "app-3"}}; 1910b57cec5SDimitry Andric #define MEM_TO_SHADOW(mem) (((uptr)(mem)) ^ 0x500000000000ULL) 1920b57cec5SDimitry Andric #define SHADOW_TO_ORIGIN(mem) (((uptr)(mem)) + 0x100000000000ULL) 1930b57cec5SDimitry Andric 1940b57cec5SDimitry Andric #else 1950b57cec5SDimitry Andric #error "Unsupported platform" 1960b57cec5SDimitry Andric #endif 1970b57cec5SDimitry Andric 1980b57cec5SDimitry Andric const uptr kMemoryLayoutSize = sizeof(kMemoryLayout) / sizeof(kMemoryLayout[0]); 1990b57cec5SDimitry Andric 2000b57cec5SDimitry Andric #define MEM_TO_ORIGIN(mem) (SHADOW_TO_ORIGIN(MEM_TO_SHADOW((mem)))) 2010b57cec5SDimitry Andric 2020b57cec5SDimitry Andric #ifndef __clang__ 2030b57cec5SDimitry Andric __attribute__((optimize("unroll-loops"))) 2040b57cec5SDimitry Andric #endif 2050b57cec5SDimitry Andric inline bool addr_is_type(uptr addr, MappingDesc::Type mapping_type) { 2060b57cec5SDimitry Andric // It is critical for performance that this loop is unrolled (because then it is 2070b57cec5SDimitry Andric // simplified into just a few constant comparisons). 2080b57cec5SDimitry Andric #ifdef __clang__ 2090b57cec5SDimitry Andric #pragma unroll 2100b57cec5SDimitry Andric #endif 2110b57cec5SDimitry Andric for (unsigned i = 0; i < kMemoryLayoutSize; ++i) 2120b57cec5SDimitry Andric if (kMemoryLayout[i].type == mapping_type && 2130b57cec5SDimitry Andric addr >= kMemoryLayout[i].start && addr < kMemoryLayout[i].end) 2140b57cec5SDimitry Andric return true; 2150b57cec5SDimitry Andric return false; 2160b57cec5SDimitry Andric } 2170b57cec5SDimitry Andric 2180b57cec5SDimitry Andric #define MEM_IS_APP(mem) addr_is_type((uptr)(mem), MappingDesc::APP) 2190b57cec5SDimitry Andric #define MEM_IS_SHADOW(mem) addr_is_type((uptr)(mem), MappingDesc::SHADOW) 2200b57cec5SDimitry Andric #define MEM_IS_ORIGIN(mem) addr_is_type((uptr)(mem), MappingDesc::ORIGIN) 2210b57cec5SDimitry Andric 22268d75effSDimitry Andric // These constants must be kept in sync with the ones in MemorySanitizer.cpp. 2230b57cec5SDimitry Andric const int kMsanParamTlsSize = 800; 2240b57cec5SDimitry Andric const int kMsanRetvalTlsSize = 800; 2250b57cec5SDimitry Andric 2260b57cec5SDimitry Andric namespace __msan { 2270b57cec5SDimitry Andric extern int msan_inited; 2280b57cec5SDimitry Andric extern bool msan_init_is_running; 2290b57cec5SDimitry Andric extern int msan_report_count; 2300b57cec5SDimitry Andric 2310b57cec5SDimitry Andric bool ProtectRange(uptr beg, uptr end); 2320b57cec5SDimitry Andric bool InitShadow(bool init_origins); 2330b57cec5SDimitry Andric char *GetProcSelfMaps(); 2340b57cec5SDimitry Andric void InitializeInterceptors(); 2350b57cec5SDimitry Andric 2360b57cec5SDimitry Andric void MsanAllocatorInit(); 2370b57cec5SDimitry Andric void MsanDeallocate(StackTrace *stack, void *ptr); 2380b57cec5SDimitry Andric 2390b57cec5SDimitry Andric void *msan_malloc(uptr size, StackTrace *stack); 2400b57cec5SDimitry Andric void *msan_calloc(uptr nmemb, uptr size, StackTrace *stack); 2410b57cec5SDimitry Andric void *msan_realloc(void *ptr, uptr size, StackTrace *stack); 2420b57cec5SDimitry Andric void *msan_reallocarray(void *ptr, uptr nmemb, uptr size, StackTrace *stack); 2430b57cec5SDimitry Andric void *msan_valloc(uptr size, StackTrace *stack); 2440b57cec5SDimitry Andric void *msan_pvalloc(uptr size, StackTrace *stack); 2450b57cec5SDimitry Andric void *msan_aligned_alloc(uptr alignment, uptr size, StackTrace *stack); 2460b57cec5SDimitry Andric void *msan_memalign(uptr alignment, uptr size, StackTrace *stack); 2470b57cec5SDimitry Andric int msan_posix_memalign(void **memptr, uptr alignment, uptr size, 2480b57cec5SDimitry Andric StackTrace *stack); 2490b57cec5SDimitry Andric 2500b57cec5SDimitry Andric void InstallTrapHandler(); 2510b57cec5SDimitry Andric void InstallAtExitHandler(); 2520b57cec5SDimitry Andric 2530b57cec5SDimitry Andric const char *GetStackOriginDescr(u32 id, uptr *pc); 2540b57cec5SDimitry Andric 25581ad6265SDimitry Andric bool IsInSymbolizerOrUnwider(); 2560b57cec5SDimitry Andric 2570b57cec5SDimitry Andric void PrintWarning(uptr pc, uptr bp); 2580b57cec5SDimitry Andric void PrintWarningWithOrigin(uptr pc, uptr bp, u32 origin); 2590b57cec5SDimitry Andric 2600b57cec5SDimitry Andric // Unpoison first n function arguments. 2610b57cec5SDimitry Andric void UnpoisonParam(uptr n); 2620b57cec5SDimitry Andric void UnpoisonThreadLocalState(); 2630b57cec5SDimitry Andric 2640b57cec5SDimitry Andric // Returns a "chained" origin id, pointing to the given stack trace followed by 2650b57cec5SDimitry Andric // the previous origin id. 2660b57cec5SDimitry Andric u32 ChainOrigin(u32 id, StackTrace *stack); 2670b57cec5SDimitry Andric 2680b57cec5SDimitry Andric const int STACK_TRACE_TAG_POISON = StackTrace::TAG_CUSTOM + 1; 269bdd1243dSDimitry Andric const int STACK_TRACE_TAG_FIELDS = STACK_TRACE_TAG_POISON + 1; 270bdd1243dSDimitry Andric const int STACK_TRACE_TAG_VPTR = STACK_TRACE_TAG_FIELDS + 1; 2710b57cec5SDimitry Andric 2720b57cec5SDimitry Andric #define GET_MALLOC_STACK_TRACE \ 2730b57cec5SDimitry Andric BufferedStackTrace stack; \ 2740b57cec5SDimitry Andric if (__msan_get_track_origins() && msan_inited) \ 2750b57cec5SDimitry Andric stack.Unwind(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME(), \ 2760b57cec5SDimitry Andric nullptr, common_flags()->fast_unwind_on_malloc, \ 2770b57cec5SDimitry Andric common_flags()->malloc_context_size) 2780b57cec5SDimitry Andric 2790b57cec5SDimitry Andric // For platforms which support slow unwinder only, we restrict the store context 2800b57cec5SDimitry Andric // size to 1, basically only storing the current pc. We do this because the slow 2810b57cec5SDimitry Andric // unwinder which is based on libunwind is not async signal safe and causes 2820b57cec5SDimitry Andric // random freezes in forking applications as well as in signal handlers. 2830b57cec5SDimitry Andric #define GET_STORE_STACK_TRACE_PC_BP(pc, bp) \ 2840b57cec5SDimitry Andric BufferedStackTrace stack; \ 2850b57cec5SDimitry Andric if (__msan_get_track_origins() > 1 && msan_inited) { \ 2860b57cec5SDimitry Andric int size = flags()->store_context_size; \ 2870b57cec5SDimitry Andric if (!SANITIZER_CAN_FAST_UNWIND) \ 2880b57cec5SDimitry Andric size = Min(size, 1); \ 2890b57cec5SDimitry Andric stack.Unwind(pc, bp, nullptr, common_flags()->fast_unwind_on_malloc, size);\ 2900b57cec5SDimitry Andric } 2910b57cec5SDimitry Andric 2920b57cec5SDimitry Andric #define GET_STORE_STACK_TRACE \ 2930b57cec5SDimitry Andric GET_STORE_STACK_TRACE_PC_BP(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME()) 2940b57cec5SDimitry Andric 2950b57cec5SDimitry Andric #define GET_FATAL_STACK_TRACE_PC_BP(pc, bp) \ 2960b57cec5SDimitry Andric BufferedStackTrace stack; \ 29768d75effSDimitry Andric if (msan_inited) { \ 29868d75effSDimitry Andric stack.Unwind(pc, bp, nullptr, common_flags()->fast_unwind_on_fatal); \ 29968d75effSDimitry Andric } 3000b57cec5SDimitry Andric 3010b57cec5SDimitry Andric class ScopedThreadLocalStateBackup { 3020b57cec5SDimitry Andric public: 3030b57cec5SDimitry Andric ScopedThreadLocalStateBackup() { Backup(); } 3040b57cec5SDimitry Andric ~ScopedThreadLocalStateBackup() { Restore(); } 3050b57cec5SDimitry Andric void Backup(); 3060b57cec5SDimitry Andric void Restore(); 3070b57cec5SDimitry Andric private: 3080b57cec5SDimitry Andric u64 va_arg_overflow_size_tls; 3090b57cec5SDimitry Andric }; 3100b57cec5SDimitry Andric 3110b57cec5SDimitry Andric void MsanTSDInit(void (*destructor)(void *tsd)); 3120b57cec5SDimitry Andric void *MsanTSDGet(); 3130b57cec5SDimitry Andric void MsanTSDSet(void *tsd); 3140b57cec5SDimitry Andric void MsanTSDDtor(void *tsd); 3150b57cec5SDimitry Andric 3160b57cec5SDimitry Andric } // namespace __msan 3170b57cec5SDimitry Andric 3180b57cec5SDimitry Andric #endif // MSAN_H 319