[compiler-rt] r315247 - [ubsan] Fix Asan internal alloc corruption in PR33221 test.

[Evgeniy Stepanov via llvm-commits]

Author: eugenis
Date: Mon Oct  9 15:52:13 2017
New Revision: 315247

URL: http://llvm.org/viewvc/llvm-project?rev=315247&view=rev
Log:
[ubsan] Fix Asan internal alloc corruption in PR33221 test.

MAP_FIXED discards the existing mapping at the given address.

Modified:
    compiler-rt/trunk/test/ubsan/TestCases/TypeCheck/Linux/PR33221.cpp

Modified: compiler-rt/trunk/test/ubsan/TestCases/TypeCheck/Linux/PR33221.cpp
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/test/ubsan/TestCases/TypeCheck/Linux/PR33221.cpp?rev=315247&r1=315246&r2=315247&view=diff
==============================================================================
--- compiler-rt/trunk/test/ubsan/TestCases/TypeCheck/Linux/PR33221.cpp (original)
+++ compiler-rt/trunk/test/ubsan/TestCases/TypeCheck/Linux/PR33221.cpp Mon Oct  9 15:52:13 2017
@@ -22,7 +22,7 @@ public:
 int main() {
   int page_size = getpagesize();
 
-  void *non_accessible = mmap(nullptr, page_size, PROT_NONE,
+  void *non_accessible = mmap(nullptr, page_size * 2, PROT_NONE,
                               MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
   
   if (non_accessible == MAP_FAILED)