[compiler-rt] r342011 - [hwasan] tests for a buffer overflow with a large allocation

[Kostya Serebryany via llvm-commits]

Author: kcc
Date: Tue Sep 11 17:27:34 2018
New Revision: 342011

URL: http://llvm.org/viewvc/llvm-project?rev=342011&view=rev
Log:
[hwasan] tests for a buffer overflow with a large allocation

Modified:
    compiler-rt/trunk/test/hwasan/TestCases/heap-buffer-overflow.c

Modified: compiler-rt/trunk/test/hwasan/TestCases/heap-buffer-overflow.c
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/test/hwasan/TestCases/heap-buffer-overflow.c?rev=342011&r1=342010&r2=342011&view=diff
==============================================================================
--- compiler-rt/trunk/test/hwasan/TestCases/heap-buffer-overflow.c (original)
+++ compiler-rt/trunk/test/hwasan/TestCases/heap-buffer-overflow.c Tue Sep 11 17:27:34 2018
@@ -2,6 +2,8 @@
 // RUN: not %run %t 40 2>&1 | FileCheck %s --check-prefix=CHECK40
 // RUN: not %run %t 80 2>&1 | FileCheck %s --check-prefix=CHECK80
 // RUN: not %run %t -30 2>&1 | FileCheck %s --check-prefix=CHECKm30
+// RUN: not %run %t -30 1000000 2>&1 | FileCheck %s --check-prefix=CHECKMm30
+// RUN: not %run %t 1000000 1000000 2>&1 | FileCheck %s --check-prefix=CHECKM
 
 // REQUIRES: stable-runtime
 
@@ -12,10 +14,13 @@
 int main(int argc, char **argv) {
   __hwasan_enable_allocator_tagging();
   int offset = argc < 2 ? 40 : atoi(argv[1]);
-  char * volatile x = (char*)malloc(30);
+  int size = argc < 3 ? 30 : atoi(argv[2]);
+  char * volatile x = (char*)malloc(size);
   x[offset] = 42;
 // CHECK40: is located 10 bytes to the right of 30-byte region
 // CHECK80: is located 50 bytes to the right of 30-byte region
 // CHECKm30: is located 30 bytes to the left of 30-byte region
+// CHECKMm30: is located 30 bytes to the left of 1000000-byte region
+// CHECKM: is located 0 bytes to the right of 1000000-byte region
   free(x);
 }