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// Check that the stack trace debugging API works and returns correct
// malloc and free stacks.
// RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
// FIXME: Figure out why allocation/free stack traces may be too short on ARM.
// REQUIRES: stable-runtime
#include <sanitizer/asan_interface.h>
#include <stdio.h>
#include <stdlib.h>
char *mem;
void func1() {
mem = (char *)malloc(10);
}
void func2() {
free(mem);
}
int main() {
func1();
func2();
void *trace[100];
size_t num_frames = 100;
int thread_id;
num_frames = __asan_get_alloc_stack(mem, trace, num_frames, &thread_id);
fprintf(stderr, "alloc stack retval %s\n", (num_frames > 0 && num_frames < 10)
? "ok" : "");
// CHECK: alloc stack retval ok
fprintf(stderr, "thread id = %d\n", thread_id);
// CHECK: thread id = 0
fprintf(stderr, "0x%lx\n", trace[0]);
// CHECK: [[ALLOC_FRAME_0:0x[0-9a-f]+]]
fprintf(stderr, "0x%lx\n", trace[1]);
// CHECK: [[ALLOC_FRAME_1:0x[0-9a-f]+]]
num_frames = 100;
num_frames = __asan_get_free_stack(mem, trace, num_frames, &thread_id);
fprintf(stderr, "free stack retval %s\n", (num_frames > 0 && num_frames < 10)
? "ok" : "");
// CHECK: free stack retval ok
fprintf(stderr, "thread id = %d\n", thread_id);
// CHECK: thread id = 0
fprintf(stderr, "0x%lx\n", trace[0]);
// CHECK: [[FREE_FRAME_0:0x[0-9a-f]+]]
fprintf(stderr, "0x%lx\n", trace[1]);
// CHECK: [[FREE_FRAME_1:0x[0-9a-f]+]]
mem[0] = 'A'; // BOOM
// CHECK: ERROR: AddressSanitizer: heap-use-after-free
// CHECK: WRITE of size 1 at 0x{{.*}}
// CHECK: freed by thread T0 here:
// CHECK: #0 [[FREE_FRAME_0]]
// CHECK: #1 [[FREE_FRAME_1]]
// CHECK: previously allocated by thread T0 here:
// CHECK: #0 [[ALLOC_FRAME_0]]
// CHECK: #1 [[ALLOC_FRAME_1]]
return 0;
}
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