From 60b75f462e1044a031fbd75a8dcb45cb3de29177 Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Tue, 29 Jul 2008 07:38:32 +0000 Subject: [PATCH] Fix for PR2578. Do not split off a block whose size is less than FreeRangeHeader::getMinBlockSize(). Patch by Damien. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54152 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/ExecutionEngine/JIT/JITMemoryManager.cpp | 3 +++ 1 file changed, 3 insertions(+) diff --git a/lib/ExecutionEngine/JIT/JITMemoryManager.cpp b/lib/ExecutionEngine/JIT/JITMemoryManager.cpp index 4cbfcf9e518..248291634cc 100644 --- a/lib/ExecutionEngine/JIT/JITMemoryManager.cpp +++ b/lib/ExecutionEngine/JIT/JITMemoryManager.cpp @@ -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(FreeRangeHeader::getMinBlockSize(), NewSize); + // Round up size for alignment of header. unsigned HeaderAlign = __alignof(FreeRangeHeader); NewSize = (NewSize+ (HeaderAlign-1)) & ~(HeaderAlign-1);