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 8 // RUN: %clangxx_asan -O0 -fsanitize-recover=address %s -o %t 2>&1 9 // RUN: %env_asan_opts=halt_on_error=false %run %t 2>&1 | FileCheck %s --check-prefix CHECK-RECOVER 10 // REQUIRES: stable-runtime 11 12 #include <stdlib.h> 13 #include <string.h> 14 int main(int argc, char **argv) { 15 char *x = (char*)malloc(10 * sizeof(char)); 16 memset(x, 0, 10); 17 int res = x[argc]; 18 free(x); 19 free(x + argc - 1); // BOOM 20 // CHECK: AddressSanitizer: attempting double-free{{.*}}in thread T0 21 // CHECK: #0 0x{{.*}} in {{.*}}free 22 // CHECK: #1 0x{{.*}} in main {{.*}}double-free.cpp:[[@LINE-3]] 23 // CHECK: freed by thread T0 here: 24 // MALLOC-CTX: #0 0x{{.*}} in {{.*}}free 25 // MALLOC-CTX: #1 0x{{.*}} in main {{.*}}double-free.cpp:[[@LINE-7]] 26 // CHECK: allocated by thread T0 here: 27 // MALLOC-CTX: double-free.cpp:[[@LINE-12]] 28 // CHECK-RECOVER: AddressSanitizer: attempting double-free{{.*}}in thread T0 29 // CHECK-RECOVER-NOT: AddressSanitizer CHECK failed: 30 return res; 31 } 32