1 // RUN: %clang_asan -O0 %s -o %t 2 // RUN: not %run %t 2>&1 | FileCheck %s 3 4 #include <execinfo.h> 5 #include <sanitizer/common_interface_defs.h> 6 #include <stdio.h> 7 #include <stdlib.h> 8 9 void death_function() { 10 fprintf(stderr, "DEATH CALLBACK\n"); 11 12 void* callstack[128]; 13 int i, frames = backtrace(callstack, 128); 14 char** strs = backtrace_symbols(callstack, frames); 15 for (i = 0; i < frames; ++i) { 16 fprintf(stderr, "%s\n", strs[i]); 17 } 18 free(strs); 19 20 fprintf(stderr, "END OF BACKTRACE\n"); 21 } 22 23 int fault_function() { 24 char *x = (char*)malloc(10 * sizeof(char)); 25 free(x); 26 return x[5]; // BOOM 27 } 28 29 int main() { 30 __sanitizer_set_death_callback(death_function); 31 fault_function(); 32 return 0; 33 } 34 35 // CHECK: {{.*ERROR: AddressSanitizer: heap-use-after-free on address}} 36 // CHECK: {{READ of size 1 at 0x.* thread T0}} 37 // CHECK: {{ #0 0x.* in fault_function}} 38 39 // CHECK: DEATH CALLBACK 40 // CHECK: death_function 41 // CHECK: fault_function 42 // CHECK: main 43 // CHECK: END OF BACKTRACE 44
