From ad9c530f7c0c92eaa8d6f98d9aca164b8dfa0365 Mon Sep 17 00:00:00 2001
From: Dmitry Vyukov <dvyukov@google.com>
Date: Fri, 30 Nov 2012 17:26:50 +0000
Subject: [PATCH] tsan: add sanity checks into memory allocator

llvm-svn: 169015
---
 compiler-rt/lib/sanitizer_common/sanitizer_allocator64.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_allocator64.h b/compiler-rt/lib/sanitizer_common/sanitizer_allocator64.h
index 2f4e697415d3..f045bdea95a0 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_allocator64.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_allocator64.h
@@ -460,11 +460,13 @@ class LargeMmapAllocator {
   };
 
   Header *GetHeader(uptr p) {
+    CHECK_EQ(p % page_size_, 0);
     return reinterpret_cast<Header*>(p - page_size_);
   }
   Header *GetHeader(void *p) { return GetHeader(reinterpret_cast<uptr>(p)); }
 
   void *GetUser(Header *h) {
+    CHECK_EQ((uptr)h % page_size_, 0);
     return reinterpret_cast<void*>(reinterpret_cast<uptr>(h) + page_size_);
   }