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| // RUN: %clang_hwasan -O1 %s -o %t
// RUN: %env_hwasan_opts=stack_history_size=2048 not %run %t 2045 2>&1 | FileCheck %s --check-prefix=YES
// RUN: %env_hwasan_opts=stack_history_size=2048 not %run %t 2047 2>&1 | FileCheck %s --check-prefix=NO
// REQUIRES: stable-runtime
#include <stdlib.h>
void USE(void *x) { // pretend_to_do_something(void *x)
__asm__ __volatile__("" : : "r" (x) : "memory");
}
volatile int four = 4;
__attribute__((noinline)) void FUNC0() { int x[4]; USE(&x[0]); }
__attribute__((noinline)) void FUNC() { int x[4]; USE(&x[0]); }
__attribute__((noinline)) void OOB() { int x[4]; x[four] = 0; USE(&x[0]); }
int main(int argc, char **argv) {
int X = argc == 2 ? atoi(argv[1]) : 10;
// FUNC0 is X+2's element of the ring buffer.
// If runtime buffer size is less than it, FUNC0 record will be lost.
FUNC0();
for (int i = 0; i < X; ++i)
FUNC();
// Make at least one call to OOB where base tag != 0 so that the bug is caught
// at least once.
OOB();
OOB();
}
// YES: Previously allocated frames
// YES: OOB
// YES: FUNC
// YES: FUNC0
// NO: Previously allocated frames
// NO: OOB
// NO: FUNC
// NO-NOT: FUNC0
|