[PATCH] D47915: [asan] Handle 0 alignment in PosixMemalignFromLocalPool

[Walter Lee via Phabricator via llvm-commits]

waltl created this revision.
waltl added reviewers: vitalybuka, alekseyshl.
Herald added a subscriber: kubamracek.

The previous CHECK was wrong because alignment can be 0.


Repository:
  rL LLVM

https://reviews.llvm.org/D47915

Files:
  compiler-rt/lib/asan/asan_malloc_linux.cc


Index: compiler-rt/lib/asan/asan_malloc_linux.cc
===================================================================
--- compiler-rt/lib/asan/asan_malloc_linux.cc
+++ compiler-rt/lib/asan/asan_malloc_linux.cc
@@ -51,7 +51,7 @@
   if (UNLIKELY(!CheckPosixMemalignAlignment(alignment)))
     return errno_EINVAL;
 
-  CHECK(alignment >= kWordSize);
+  alignment = Max(alignment, kWordSize);
 
   uptr addr = (uptr)&alloc_memory_for_dlsym[allocated_for_dlsym];
   uptr aligned_addr = RoundUpTo(addr, alignment);


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D47915.150424.patch
Type: text/x-patch
Size: 509 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20180607/1137b6fe/attachment.bin>