1 // RUN: %clangxx_asan -O2 %s -o %t 2 // RUN: %env_asan_opts=fast_unwind_on_malloc=1 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-FAST 3 // RUN: %env_asan_opts=fast_unwind_on_malloc=0 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-SLOW 4 5 // Test how well we unwind in presence of qsort in the stack 6 // (i.e. if we can unwind through a function compiled w/o frame pointers). 7 // https://code.google.com/p/address-sanitizer/issues/detail?id=137 8 9 // Fast unwinder is only available on x86_64 and i386. 10 // REQUIRES: x86_64-supported-target 11 12 // REQUIRES: compiler-rt-optimized 13 14 #include <stdlib.h> 15 #include <stdio.h> 16 17 int *GlobalPtr; 18 19 extern "C" { 20 int QsortCallback(const void *a, const void *b) { 21 char *x = (char*)a; 22 char *y = (char*)b; 23 printf("Calling QsortCallback\n"); 24 GlobalPtr = new int[10]; 25 return (int)*x - (int)*y; 26 } 27 28 __attribute__((noinline)) 29 void MyQsort(char *a, size_t size) { 30 printf("Calling qsort\n"); 31 qsort(a, size, sizeof(char), QsortCallback); 32 printf("Done\n"); // Avoid tail call. 33 } 34 } // extern "C" 35 36 int main() { 37 char a[2] = {1, 2}; 38 MyQsort(a, 2); 39 return GlobalPtr[10]; 40 } 41 42 // Fast unwind may not unwind through qsort. 43 // CHECK-FAST: ERROR: AddressSanitizer: heap-buffer-overflow 44 // CHECK-FAST: is located 0 bytes to the right 45 // CHECK-FAST: #0{{.*}}operator new 46 // CHECK-FAST-NEXT: #1{{.*}}QsortCallback 47 48 // CHECK-SLOW: ERROR: AddressSanitizer: heap-buffer-overflow 49 // CHECK-SLOW: is located 0 bytes to the right 50 // CHECK-SLOW: #0{{.*}}operator new 51 // CHECK-SLOW-NEXT: #1{{.*}}QsortCallback 52 // CHECK-SLOW: #{{.*}}MyQsort 53 // CHECK-SLOW-NEXT: #{{.*}}main 54
