diff options
author | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2015-09-29 21:28:54 +0000 |
---|---|---|
committer | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2015-09-29 21:28:54 +0000 |
commit | 89fbf48c3f234712be522e62591a9cb137adb69d (patch) | |
tree | 6ba0e7091e3a079c7c7171af80d9d8e0f5f283e1 /lib/msan/msan_allocator.cc | |
parent | 380cd5916e0b30615c5a006b6097574725e62603 (diff) |
[msan] Early allocator initialization.
Map MSan heap space early (in __msan_init) so that user code can not
accidentally (i.e. w/o MAP_FIXED) create a conflicting mapping.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@248829 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/msan/msan_allocator.cc')
-rw-r--r-- | lib/msan/msan_allocator.cc | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/lib/msan/msan_allocator.cc b/lib/msan/msan_allocator.cc index b713c66b9..006d993f0 100644 --- a/lib/msan/msan_allocator.cc +++ b/lib/msan/msan_allocator.cc @@ -87,12 +87,7 @@ static Allocator allocator; static AllocatorCache fallback_allocator_cache; static SpinMutex fallback_mutex; -static int inited = 0; - -static inline void Init() { - if (inited) return; - __msan_init(); - inited = true; // this must happen before any threads are created. +void MsanAllocatorInit() { allocator.Init(common_flags()->allocator_may_return_null); } @@ -108,7 +103,6 @@ void MsanThreadLocalMallocStorage::CommitBack() { static void *MsanAllocate(StackTrace *stack, uptr size, uptr alignment, bool zeroise) { - Init(); if (size > kMaxAllowedMallocSize) { Report("WARNING: MemorySanitizer failed to allocate %p bytes\n", (void *)size); @@ -143,7 +137,6 @@ static void *MsanAllocate(StackTrace *stack, uptr size, uptr alignment, void MsanDeallocate(StackTrace *stack, void *p) { CHECK(p); - Init(); MSAN_FREE_HOOK(p); Metadata *meta = reinterpret_cast<Metadata *>(allocator.GetMetaData(p)); uptr size = meta->requested_size; @@ -170,7 +163,6 @@ void MsanDeallocate(StackTrace *stack, void *p) { } void *MsanCalloc(StackTrace *stack, uptr nmemb, uptr size) { - Init(); if (CallocShouldReturnNullDueToOverflow(size, nmemb)) return allocator.ReturnNullOrDie(); return MsanReallocate(stack, 0, nmemb * size, sizeof(u64), true); |