compiler-rt/test/shadowcallstack/overflow.c

   1 // Test that a stack overflow fails as expected
   2
   3 // RUN: %clang_noscs %s -o %t -DITERATIONS=3
   4 // RUN: %run %t | FileCheck %s
   5 // RUN: %clang_noscs %s -o %t -DITERATIONS=12
   6 // RUN: %run %t | FileCheck -check-prefix=OVERFLOW_SUCCESS %s
   7
   8 // RUN: %clang_scs %s -o %t -DITERATIONS=3
   9 // RUN: %run %t | FileCheck %s
  10
  11 // On aarch64 we just load the return address from the shadow call stack so we
  12 // do not expect to see the output from print_and_exit.
  13 // RUN: %clang_scs %s -o %t -DITERATIONS=12
  14 // RUN: %run %t | FileCheck %S/overflow.c
  15
  16 #include <stdio.h>
  17 #include <stdlib.h>
  18
  19 #include "minimal_runtime.h"
  20
  21 void print_and_exit(void) {
  22 // CHECK-NOT: Stack overflow successful.
  23 // OVERFLOW_SUCCESS: Stack overflow successful.
  24   scs_fputs_stdout("Stack overflow successful.\n");
  25   exit(0);
  26 }
  27
  28 int scs_main(void)
  29 {
  30   void *addrs[4];
  31   for (int i = 0; i < ITERATIONS; i++)
  32     addrs[i] = &print_and_exit;
  33
  34   scs_fputs_stdout("Returning.\n");
  35
  36   return 0;
  37 }