diff options
Diffstat (limited to 'llvm/lib/Support/Unix')
| -rw-r--r-- | llvm/lib/Support/Unix/Memory.inc | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/Support/Unix/Memory.inc b/llvm/lib/Support/Unix/Memory.inc index 6bbaf509d81..edbc7938f0c 100644 --- a/llvm/lib/Support/Unix/Memory.inc +++ b/llvm/lib/Support/Unix/Memory.inc @@ -153,7 +153,10 @@ Memory::protectMappedMemory(const MemoryBlock &M, unsigned Flags) { int Protect = getPosixProtectionFlags(Flags); - int Result = ::mprotect((void*)((uintptr_t)M.Address & ~(PageSize-1)), PageSize*((M.Size+PageSize-1)/PageSize), Protect); + uintptr_t Start = alignAddr((uint8_t *)M.Address - PageSize + 1, PageSize); + uintptr_t End = alignAddr((uint8_t *)M.Address + M.Size, PageSize); + int Result = ::mprotect((void *)Start, End - Start, Protect); + if (Result != 0) return std::error_code(errno, std::generic_category()); |
