diff options
Diffstat (limited to 'lib/msan')
-rw-r--r-- | lib/msan/msan_allocator.cc | 96 | ||||
-rw-r--r-- | lib/msan/msan_allocator.h | 97 | ||||
-rw-r--r-- | lib/msan/msan_interceptors.cc | 2 |
3 files changed, 101 insertions, 94 deletions
diff --git a/lib/msan/msan_allocator.cc b/lib/msan/msan_allocator.cc index 1be573faa..f76b01de0 100644 --- a/lib/msan/msan_allocator.cc +++ b/lib/msan/msan_allocator.cc @@ -12,8 +12,6 @@ // MemorySanitizer allocator. //===----------------------------------------------------------------------===// -#include "sanitizer_common/sanitizer_allocator.h" -#include "sanitizer_common/sanitizer_allocator_interface.h" #include "msan.h" #include "msan_allocator.h" #include "msan_origin.h" @@ -22,102 +20,12 @@ namespace __msan { -struct Metadata { - uptr requested_size; -}; - -struct MsanMapUnmapCallback { - void OnMap(uptr p, uptr size) const {} - void OnUnmap(uptr p, uptr size) const { - __msan_unpoison((void *)p, size); - - // We are about to unmap a chunk of user memory. - // Mark the corresponding shadow memory as not needed. - uptr shadow_p = MEM_TO_SHADOW(p); - ReleaseMemoryPagesToOS(shadow_p, shadow_p + size); - if (__msan_get_track_origins()) { - uptr origin_p = MEM_TO_ORIGIN(p); - ReleaseMemoryPagesToOS(origin_p, origin_p + size); - } - } -}; - -#if defined(__mips64) - static const uptr kMaxAllowedMallocSize = 2UL << 30; - static const uptr kRegionSizeLog = 20; - static const uptr kNumRegions = SANITIZER_MMAP_RANGE_SIZE >> kRegionSizeLog; - typedef TwoLevelByteMap<(kNumRegions >> 12), 1 << 12> ByteMap; - - struct AP32 { - static const uptr kSpaceBeg = 0; - static const u64 kSpaceSize = SANITIZER_MMAP_RANGE_SIZE; - static const uptr kMetadataSize = sizeof(Metadata); - typedef __sanitizer::CompactSizeClassMap SizeClassMap; - static const uptr kRegionSizeLog = __msan::kRegionSizeLog; - typedef __msan::ByteMap ByteMap; - typedef MsanMapUnmapCallback MapUnmapCallback; - static const uptr kFlags = 0; - }; - typedef SizeClassAllocator32<AP32> PrimaryAllocator; -#elif defined(__x86_64__) -#if SANITIZER_LINUX && !defined(MSAN_LINUX_X86_64_OLD_MAPPING) - static const uptr kAllocatorSpace = 0x700000000000ULL; -#else - static const uptr kAllocatorSpace = 0x600000000000ULL; -#endif - static const uptr kMaxAllowedMallocSize = 8UL << 30; - - struct AP64 { // Allocator64 parameters. Deliberately using a short name. - static const uptr kSpaceBeg = kAllocatorSpace; - static const uptr kSpaceSize = 0x40000000000; // 4T. - static const uptr kMetadataSize = sizeof(Metadata); - typedef DefaultSizeClassMap SizeClassMap; - typedef MsanMapUnmapCallback MapUnmapCallback; - static const uptr kFlags = 0; - }; - - typedef SizeClassAllocator64<AP64> PrimaryAllocator; - -#elif defined(__powerpc64__) - static const uptr kMaxAllowedMallocSize = 2UL << 30; // 2G - - struct AP64 { // Allocator64 parameters. Deliberately using a short name. - static const uptr kSpaceBeg = 0x300000000000; - static const uptr kSpaceSize = 0x020000000000; // 2T. - static const uptr kMetadataSize = sizeof(Metadata); - typedef DefaultSizeClassMap SizeClassMap; - typedef MsanMapUnmapCallback MapUnmapCallback; - static const uptr kFlags = 0; - }; - - typedef SizeClassAllocator64<AP64> PrimaryAllocator; -#elif defined(__aarch64__) - static const uptr kMaxAllowedMallocSize = 2UL << 30; // 2G - static const uptr kRegionSizeLog = 20; - static const uptr kNumRegions = SANITIZER_MMAP_RANGE_SIZE >> kRegionSizeLog; - typedef TwoLevelByteMap<(kNumRegions >> 12), 1 << 12> ByteMap; - - struct AP32 { - static const uptr kSpaceBeg = 0; - static const u64 kSpaceSize = SANITIZER_MMAP_RANGE_SIZE; - static const uptr kMetadataSize = sizeof(Metadata); - typedef __sanitizer::CompactSizeClassMap SizeClassMap; - static const uptr kRegionSizeLog = __msan::kRegionSizeLog; - typedef __msan::ByteMap ByteMap; - typedef MsanMapUnmapCallback MapUnmapCallback; - static const uptr kFlags = 0; - }; - typedef SizeClassAllocator32<AP32> PrimaryAllocator; -#endif -typedef SizeClassAllocatorLocalCache<PrimaryAllocator> AllocatorCache; -typedef LargeMmapAllocator<MsanMapUnmapCallback> SecondaryAllocator; -typedef CombinedAllocator<PrimaryAllocator, AllocatorCache, - SecondaryAllocator> Allocator; - static Allocator allocator; static AllocatorCache fallback_allocator_cache; static SpinMutex fallback_mutex; +Allocator &get_allocator() { return allocator; } + void MsanAllocatorInit() { allocator.Init( common_flags()->allocator_may_return_null, diff --git a/lib/msan/msan_allocator.h b/lib/msan/msan_allocator.h index 407942e54..abd4ea678 100644 --- a/lib/msan/msan_allocator.h +++ b/lib/msan/msan_allocator.h @@ -15,9 +15,106 @@ #define MSAN_ALLOCATOR_H #include "sanitizer_common/sanitizer_common.h" +#include "sanitizer_common/sanitizer_allocator.h" +#include "sanitizer_common/sanitizer_allocator_interface.h" namespace __msan { +struct Metadata { + uptr requested_size; +}; + +struct MsanMapUnmapCallback { + void OnMap(uptr p, uptr size) const {} + void OnUnmap(uptr p, uptr size) const { + __msan_unpoison((void *)p, size); + + // We are about to unmap a chunk of user memory. + // Mark the corresponding shadow memory as not needed. + uptr shadow_p = MEM_TO_SHADOW(p); + ReleaseMemoryPagesToOS(shadow_p, shadow_p + size); + if (__msan_get_track_origins()) { + uptr origin_p = MEM_TO_ORIGIN(p); + ReleaseMemoryPagesToOS(origin_p, origin_p + size); + } + } +}; + +#if defined(__mips64) + static const uptr kMaxAllowedMallocSize = 2UL << 30; + static const uptr kRegionSizeLog = 20; + static const uptr kNumRegions = SANITIZER_MMAP_RANGE_SIZE >> kRegionSizeLog; + typedef TwoLevelByteMap<(kNumRegions >> 12), 1 << 12> ByteMap; + + struct AP32 { + static const uptr kSpaceBeg = 0; + static const u64 kSpaceSize = SANITIZER_MMAP_RANGE_SIZE; + static const uptr kMetadataSize = sizeof(Metadata); + typedef __sanitizer::CompactSizeClassMap SizeClassMap; + static const uptr kRegionSizeLog = __msan::kRegionSizeLog; + typedef __msan::ByteMap ByteMap; + typedef MsanMapUnmapCallback MapUnmapCallback; + static const uptr kFlags = 0; + }; + typedef SizeClassAllocator32<AP32> PrimaryAllocator; +#elif defined(__x86_64__) +#if SANITIZER_LINUX && !defined(MSAN_LINUX_X86_64_OLD_MAPPING) + static const uptr kAllocatorSpace = 0x700000000000ULL; +#else + static const uptr kAllocatorSpace = 0x600000000000ULL; +#endif + static const uptr kMaxAllowedMallocSize = 8UL << 30; + + struct AP64 { // Allocator64 parameters. Deliberately using a short name. + static const uptr kSpaceBeg = kAllocatorSpace; + static const uptr kSpaceSize = 0x40000000000; // 4T. + static const uptr kMetadataSize = sizeof(Metadata); + typedef DefaultSizeClassMap SizeClassMap; + typedef MsanMapUnmapCallback MapUnmapCallback; + static const uptr kFlags = 0; + }; + + typedef SizeClassAllocator64<AP64> PrimaryAllocator; + +#elif defined(__powerpc64__) + static const uptr kMaxAllowedMallocSize = 2UL << 30; // 2G + + struct AP64 { // Allocator64 parameters. Deliberately using a short name. + static const uptr kSpaceBeg = 0x300000000000; + static const uptr kSpaceSize = 0x020000000000; // 2T. + static const uptr kMetadataSize = sizeof(Metadata); + typedef DefaultSizeClassMap SizeClassMap; + typedef MsanMapUnmapCallback MapUnmapCallback; + static const uptr kFlags = 0; + }; + + typedef SizeClassAllocator64<AP64> PrimaryAllocator; +#elif defined(__aarch64__) + static const uptr kMaxAllowedMallocSize = 2UL << 30; // 2G + static const uptr kRegionSizeLog = 20; + static const uptr kNumRegions = SANITIZER_MMAP_RANGE_SIZE >> kRegionSizeLog; + typedef TwoLevelByteMap<(kNumRegions >> 12), 1 << 12> ByteMap; + + struct AP32 { + static const uptr kSpaceBeg = 0; + static const u64 kSpaceSize = SANITIZER_MMAP_RANGE_SIZE; + static const uptr kMetadataSize = sizeof(Metadata); + typedef __sanitizer::CompactSizeClassMap SizeClassMap; + static const uptr kRegionSizeLog = __msan::kRegionSizeLog; + typedef __msan::ByteMap ByteMap; + typedef MsanMapUnmapCallback MapUnmapCallback; + static const uptr kFlags = 0; + }; + typedef SizeClassAllocator32<AP32> PrimaryAllocator; +#endif +typedef SizeClassAllocatorLocalCache<PrimaryAllocator> AllocatorCache; +typedef LargeMmapAllocator<MsanMapUnmapCallback> SecondaryAllocator; +typedef CombinedAllocator<PrimaryAllocator, AllocatorCache, + SecondaryAllocator> Allocator; + + +Allocator &get_allocator(); + struct MsanThreadLocalMallocStorage { uptr quarantine_cache[16]; // Allocator cache contains atomic_uint64_t which must be 8-byte aligned. diff --git a/lib/msan/msan_interceptors.cc b/lib/msan/msan_interceptors.cc index 15543bd91..ab08744a7 100644 --- a/lib/msan/msan_interceptors.cc +++ b/lib/msan/msan_interceptors.cc @@ -1228,6 +1228,7 @@ INTERCEPTOR(void *, shmat, int shmid, const void *shmaddr, int shmflg) { } static void BeforeFork() { + get_allocator().ForceLock(); StackDepotLockAll(); ChainedOriginDepotLockAll(); } @@ -1235,6 +1236,7 @@ static void BeforeFork() { static void AfterFork() { ChainedOriginDepotUnlockAll(); StackDepotUnlockAll(); + get_allocator().ForceUnlock(); } INTERCEPTOR(int, fork, void) { |