diff options
Diffstat (limited to 'llvm/lib/ExecutionEngine/SectionMemoryManager.cpp')
-rw-r--r-- | llvm/lib/ExecutionEngine/SectionMemoryManager.cpp | 6 |
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, |