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[hwasan] tests for a buffer overflow with a large allocation 

llvm-svn: 342011
This commit is contained in:
Kostya Serebryany 2018-09-12 00:27:34 +00:00
parent efe18d3977
commit 2362bf7d10
1 changed files with 6 additions and 1 deletions
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7
compiler-rt/test/hwasan/TestCases/heap-buffer-overflow.c
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@ -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);
}