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Fix for PR2578. Do not split off a block whose size is less than FreeRangeHeader::getMinBlockSize(). Patch by Damien.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54152 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2008-07-29 07:38:32 +00:00
parent 7ba145b0b4
commit 60b75f462e
1 changed files with 3 additions and 0 deletions
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lib/ExecutionEngine/JIT/JITMemoryManager.cpp
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@ -202,6 +202,9 @@ TrimAllocationToSize(FreeRangeHeader *FreeList, uint64_t NewSize) {
assert(ThisAllocated && getBlockAfter().PrevAllocated &&
"Cannot deallocate part of an allocated block!");
// Don't allow blocks to be trimmed below minimum required size
NewSize = std::max<uint64_t>(FreeRangeHeader::getMinBlockSize(), NewSize);
// Round up size for alignment of header.
unsigned HeaderAlign = __alignof(FreeRangeHeader);
NewSize = (NewSize+ (HeaderAlign-1)) & ~(HeaderAlign-1);