llvm-project/compiler-rt/test/asan/TestCases/alloca_underflow_left.cc

19 lines
539 B
C++

// RUN: %clangxx_asan -O0 -mllvm -asan-instrument-dynamic-allocas %s -o %t
// RUN: not %run %t 2>&1 | FileCheck %s
//
#include <assert.h>
__attribute__((noinline)) void foo(int index, int len) {
volatile char str[len] __attribute__((aligned(32)));
assert(!(reinterpret_cast<long>(str) & 31L));
str[index] = '1'; // BOOM
// CHECK: ERROR: AddressSanitizer: dynamic-stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
// CHECK: WRITE of size 1 at [[ADDR]] thread T0
}
int main(int argc, char **argv) {
foo(-1, 10);
return 0;
}