summaryrefslogtreecommitdiffstats
path: root/llvm/lib/ExecutionEngine/SectionMemoryManager.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'llvm/lib/ExecutionEngine/SectionMemoryManager.cpp')
-rw-r--r--llvm/lib/ExecutionEngine/SectionMemoryManager.cpp6
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/ExecutionEngine/SectionMemoryManager.cpp b/llvm/lib/ExecutionEngine/SectionMemoryManager.cpp
index 5f542f4304b..ba277796dd5 100644
--- a/llvm/lib/ExecutionEngine/SectionMemoryManager.cpp
+++ b/llvm/lib/ExecutionEngine/SectionMemoryManager.cpp
@@ -242,7 +242,11 @@ public:
allocateMappedMemory(SectionMemoryManager::AllocationPurpose Purpose,
size_t NumBytes, const sys::MemoryBlock *const NearBlock,
unsigned Flags, std::error_code &EC) override {
- return sys::Memory::allocateMappedMemory(NumBytes, NearBlock, Flags, EC);
+ // allocateMappedMemory calls mmap(2). We round up a request size
+ // to page size to get extra space for free.
+ static const size_t PageSize = sys::Process::getPageSize();
+ size_t ReqBytes = (NumBytes + PageSize - 1) & ~(PageSize - 1);
+ return sys::Memory::allocateMappedMemory(ReqBytes, NearBlock, Flags, EC);
}
std::error_code protectMappedMemory(const sys::MemoryBlock &Block,
OpenPOWER on IntegriCloud