1 // RUN: %clangxx_asan -O0 %s -o %t 2>&1 2 // RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=MALLOC-CTX 3 4 // Also works if no malloc context is available. 5 // RUN: %env_asan_opts=malloc_context_size=0:fast_unwind_on_malloc=0 not %run %t 2>&1 | FileCheck %s 6 // RUN: %env_asan_opts=malloc_context_size=0:fast_unwind_on_malloc=1 not %run %t 2>&1 | FileCheck %s 7 // XFAIL: arm-linux-gnueabi 8 // XFAIL: armv7l-unknown-linux-gnueabihf 9 10 #include <stdlib.h> 11 #include <string.h> 12 int main(int argc, char **argv) { 13 char *x = (char*)malloc(10 * sizeof(char)); 14 memset(x, 0, 10); 15 int res = x[argc]; 16 free(x); 17 free(x + argc - 1); // BOOM 18 // CHECK: AddressSanitizer: attempting double-free{{.*}}in thread T0 19 // CHECK: #0 0x{{.*}} in {{.*}}free 20 // CHECK: #1 0x{{.*}} in main {{.*}}double-free.cc:[[@LINE-3]] 21 // CHECK: freed by thread T0 here: 22 // MALLOC-CTX: #0 0x{{.*}} in {{.*}}free 23 // MALLOC-CTX: #1 0x{{.*}} in main {{.*}}double-free.cc:[[@LINE-7]] 24 // CHECK: allocated by thread T0 here: 25 // MALLOC-CTX: double-free.cc:[[@LINE-12]] 26 return res; 27 } 28
