compiler-rt/test/asan/TestCases/stack-oob-frames.cpp

   1 // RUN: %clangxx_asan -O1 %s -o %t
   2 // RUN: not %run %t 0 2>&1 | FileCheck %s --check-prefix=CHECK0
   3 // RUN: not %run %t 1 2>&1 | FileCheck %s --check-prefix=CHECK1
   4 // RUN: not %run %t 2 2>&1 | FileCheck %s --check-prefix=CHECK2
   5 // RUN: not %run %t 3 2>&1 | FileCheck %s --check-prefix=CHECK3
   6
   7 #define NOINLINE __attribute__((noinline))
   8 inline void break_optimization(void *arg) {
   9   __asm__ __volatile__("" : : "r" (arg) : "memory");
  10 }
  11
  12 NOINLINE static void Frame0(int frame, char *a, char *b, char *c) {
  13   char s[4] = {0};
  14   char *d = s;
  15   break_optimization(&d);
  16   switch (frame) {
  17     case 3: a[5]++; break;
  18     case 2: b[5]++; break;
  19     case 1: c[5]++; break;
  20     case 0: d[5]++; break;
  21   }
  22 }
  23 NOINLINE static void Frame1(int frame, char *a, char *b) {
  24   char c[4] = {0}; Frame0(frame, a, b, c);
  25   break_optimization(0);
  26 }
  27 NOINLINE static void Frame2(int frame, char *a) {
  28   char b[4] = {0}; Frame1(frame, a, b);
  29   break_optimization(0);
  30 }
  31 NOINLINE static void Frame3(int frame) {
  32   char a[4] = {0}; Frame2(frame, a);
  33   break_optimization(0);
  34 }
  35
  36 int main(int argc, char **argv) {
  37   if (argc != 2) return 1;
  38   Frame3(argv[1][0] - '0');
  39 }
  40
  41 // CHECK0: AddressSanitizer: stack-buffer-overflow
  42 // CHECK0: #0{{.*}}Frame0
  43 // CHECK0: #1{{.*}}Frame1
  44 // CHECK0: #2{{.*}}Frame2
  45 // CHECK0: #3{{.*}}Frame3
  46 // CHECK0: is located in stack of thread T0 at offset
  47 // CHECK0-NEXT: #0{{.*}}Frame0
  48 //
  49 // CHECK1: AddressSanitizer: stack-buffer-overflow
  50 // CHECK1: is located in stack of thread T0 at offset
  51 // CHECK1-NEXT: #0{{.*}}Frame1
  52 //
  53 // CHECK2: AddressSanitizer: stack-buffer-overflow
  54 // CHECK2: is located in stack of thread T0 at offset
  55 // CHECK2-NEXT: #0{{.*}}Frame2
  56 //
  57 // CHECK3: AddressSanitizer: stack-buffer-overflow
  58 // CHECK3: is located in stack of thread T0 at offset
  59 // CHECK3-NEXT: #0{{.*}}Frame3