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[ASan] Re-structure the allocator code. NFC. 

Introduce "Allocator" object, which contains all the bits and pieces
ASan allocation machinery actually use: allocator from sanitizer_common,
quarantine, fallback allocator and quarantine caches, fallback mutex.

This step is a preparation to adding more state to this object. We want
to reduce dependency of Allocator on commandline flags and be able to
"safely" modify its behavior (such as the size of the redzone) at
runtime.

llvm-svn: 224406
This commit is contained in:
Alexey Samsonov 2014-12-17 01:55:03 +00:00
parent 65c52ae8ca
commit b2dcac0bb7
2 changed files with 487 additions and 437 deletions
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920
compiler-rt/lib/asan/asan_allocator.cc
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4
compiler-rt/lib/asan/asan_allocator.h
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@ -127,12 +127,12 @@ typedef SizeClassAllocator32<0, SANITIZER_MMAP_RANGE_SIZE, 16,
typedef SizeClassAllocatorLocalCache<PrimaryAllocator> AllocatorCache;
typedef LargeMmapAllocator<AsanMapUnmapCallback> SecondaryAllocator;
typedef CombinedAllocator<PrimaryAllocator, AllocatorCache,
SecondaryAllocator> Allocator;
SecondaryAllocator> AsanAllocator;
struct AsanThreadLocalMallocStorage {
uptr quarantine_cache[16];
AllocatorCache allocator2_cache;
AllocatorCache allocator_cache;
void CommitBack();
private:
// These objects are allocated via mmap() and are zero-initialized.