unit-tests/test-cases/symbol-resolver-lazy-prebound/bar.c

   1 /*
   2  * Copyright (c) 2012 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #include <stdlib.h>
  25 #include <stdbool.h>
  26 #include "test.h" // PASS(), FAIL(), XPASS(), XFAIL()
  27
  28 static bool hasBeenInited = false;
  29
  30 __attribute__((constructor))
  31 void myInit()
  32 {
  33         hasBeenInited = true;
  34 }
  35
  36
  37 int barGood()
  38 {
  39         return 1;
  40 }
  41
  42 int barBad()
  43 {
  44         return 0;
  45 }
  46
  47
  48 // This bar is a "resolver" function that return the actual address of "bar"
  49 void* bar()
  50 {
  51         __asm__(".symbol_resolver _bar");  // magic until we have compiler support
  52         // <rdar://problem/12629331> Resolver function run before initializers
  53         if ( hasBeenInited )
  54                 return &barGood;
  55         else
  56                 return &barBad;
  57 }
  58