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| author | Alina Sbirlea <asbirlea@google.com> | 2016-11-05 04:22:15 +0000 |
|---|---|---|
| committer | Alina Sbirlea <asbirlea@google.com> | 2016-11-05 04:22:15 +0000 |
| commit | f802c3f97527b843f118e1ce91a9281483f72448 (patch) | |
| tree | d1e037fd84740bb5fa9017c76cecb8acf32743c6 /llvm/lib/Support/Unix | |
| parent | a2f12e0a7511ef0c1979a5b9258a1a0101ba4eb0 (diff) | |
| download | bcm5719-llvm-f802c3f97527b843f118e1ce91a9281483f72448.tar.gz bcm5719-llvm-f802c3f97527b843f118e1ce91a9281483f72448.zip | |
Correct mprotect page boundries to round up end page. Fixes PR30905.
Summary:
Update the boundries for mprotect.
Patch by Andrew Adams. Fixes PR30905.
Reviewers: loladiro, andrew.w.kaylor, chandlerc
Subscribers: abadams, llvm-commits
Differential Revision: https://reviews.llvm.org/D26312
llvm-svn: 286032
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()); |
