1 // Regression test for https://github.com/google/sanitizers/issues/691 2 3 // RUN: %clangxx_asan -O0 %s -o %t -fstack-protector 4 // RUN: %run %t 1 2>&1 | FileCheck %s 5 // RUN: %run %t 2 2>&1 | FileCheck %s 6 7 #include <stdio.h> 8 #include <string.h> 9 10 // MSVC provides _alloca instead of alloca. 11 #if defined(_MSC_VER) && !defined(alloca) 12 # define alloca _alloca 13 #else 14 #include <alloca.h> 15 #endif 16 17 18 void f1_alloca() { 19 char *dynamic_buffer = (char *)alloca(200); 20 fprintf(stderr, "dynamic_buffer = %p\n", dynamic_buffer); 21 memset(dynamic_buffer, 'y', 200); 22 return; 23 } 24 25 static const int kDynamicArraySize = 200; 26 27 void f1_vla() { 28 char dynamic_buffer[kDynamicArraySize]; 29 fprintf(stderr, "dynamic_buffer = %p\n", dynamic_buffer); 30 memset(dynamic_buffer, 'y', kDynamicArraySize); 31 return; 32 } 33 34 void f2() { 35 char buf[1024]; 36 memset(buf, 'x', 1024); 37 } 38 39 int main(int argc, const char *argv[]) { 40 if (!strcmp(argv[1], "1")) { 41 f1_alloca(); 42 } else if (!strcmp(argv[1], "2")) { 43 f1_vla(); 44 } 45 f2(); 46 fprintf(stderr, "Done.\n"); 47 return 0; 48 } 49 50 // CHECK-NOT: ERROR: AddressSanitizer 51 // CHECK: Done. 52
