[compiler-rt] r187411 - [asan] Limit fake stack size to a reasonable value when running with unlimited stack.

[Evgeniy Stepanov]

Author: eugenis
Date: Tue Jul 30 06:50:26 2013
New Revision: 187411

URL: http://llvm.org/viewvc/llvm-project?rev=187411&view=rev
Log:
[asan] Limit fake stack size to a reasonable value when running with unlimited stack.

Modified:
    compiler-rt/trunk/lib/asan/asan_fake_stack.cc

Modified: compiler-rt/trunk/lib/asan/asan_fake_stack.cc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/asan/asan_fake_stack.cc?rev=187411&r1=187410&r2=187411&view=diff
==============================================================================
--- compiler-rt/trunk/lib/asan/asan_fake_stack.cc (original)
+++ compiler-rt/trunk/lib/asan/asan_fake_stack.cc Tue Jul 30 06:50:26 2013
@@ -92,7 +92,10 @@ void FakeStack::Cleanup() {
 }
 
 uptr FakeStack::ClassMmapSize(uptr size_class) {
-  return RoundUpToPowerOfTwo(stack_size_);
+  // Limit allocation size to ClassSize * MaxDepth when running with unlimited
+  // stack.
+  return RoundUpTo(Min(ClassSize(size_class) * kMaxRecursionDepth, stack_size_),
+                   GetPageSizeCached());
 }
 
 void FakeStack::AllocateOneSizeClass(uptr size_class) {