9d045a5c1e
This CL adds an optional warning to diagnose uses of the `__builtin_alloca` family of functions. The use of these functions is discouraged by many, so it seems like a good idea to allow clang to warn about it. Patch by Elaina Guan! Differential Revision: https://reviews.llvm.org/D64883 llvm-svn: 367067
21 lines
739 B
C
21 lines
739 B
C
// RUN: %clang_cc1 -DSILENCE -fsyntax-only -verify -Wall %s
|
|
// RUN: %clang_cc1 -fsyntax-only -verify -Walloca %s
|
|
|
|
#ifdef SILENCE
|
|
// expected-no-diagnostics
|
|
#endif
|
|
|
|
void test1(int a) {
|
|
__builtin_alloca(a);
|
|
#ifndef SILENCE
|
|
// 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}}
|
|
#endif
|
|
}
|
|
|
|
void test2(int a) {
|
|
__builtin_alloca_with_align(a, 32);
|
|
#ifndef SILENCE
|
|
// 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}}
|
|
#endif
|
|
}
|