clang/test/Sema/warn-alloca.c

   1 // RUN: %clang_cc1 -DSILENCE -fsyntax-only -verify -Wall %s
   2 // RUN: %clang_cc1 -fsyntax-only -verify -Walloca %s
   3
   4 #ifdef SILENCE
   5   // expected-no-diagnostics
   6 #endif
   7
   8 void test1(int a) {
   9   __builtin_alloca(a);
  10 #ifndef SILENCE
  11   // expected-warning@-2 {{use of function '__builtin_alloca' is discouraged; there is no way to check for failure but failure may still occur, resulting in a possibly exploitable security vulnerability}}
  12 #endif
  13 }
  14
  15 void test2(int a) {
  16   __builtin_alloca_with_align(a, 32);
  17 #ifndef SILENCE
  18   // expected-warning@-2 {{use of function '__builtin_alloca_with_align' is discouraged; there is no way to check for failure but failure may still occur, resulting in a possibly exploitable security vulnerability}}
  19 #endif
  20 }
  21
  22 void test3(int a) {
  23   __builtin_alloca_uninitialized(a);
  24 #ifndef SILENCE
  25   // expected-warning@-2 {{use of function '__builtin_alloca_uninitialized' is discouraged; there is no way to check for failure but failure may still occur, resulting in a possibly exploitable security vulnerability}}
  26 #endif
  27 }
  28
  29 void test4(int a) {
  30   __builtin_alloca_with_align_uninitialized(a, 32);
  31 #ifndef SILENCE
  32   // expected-warning@-2 {{use of function '__builtin_alloca_with_align_uninitialized' is discouraged; there is no way to check for failure but failure may still occur, resulting in a possibly exploitable security vulnerability}}
  33 #endif
  34 }