unit-tests/test-cases/symbol-resolver-pointer/foo.c

   1 /*
   2  * Copyright (c) 2010 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
  26 #include "test.h" // PASS(), FAIL(), XPASS(), XFAIL()
  27
  28 int resolverCallCount = 0;
  29 int realTestCallCount = 0;
  30
  31
  32 void test$FOO();
  33 void test$FOO() {
  34     //printf("test\n");
  35         ++realTestCallCount;
  36 }
  37
  38 void* test_chooser() __asm__("_test");
  39 void* test_chooser() {
  40     __asm__(".symbol_resolver _test");
  41     //printf("resolver\n");
  42         ++resolverCallCount;
  43     return test$FOO;
  44 }
  45
  46 void test();
  47 static void (*t)(void) = test;
  48
  49 void check() {
  50     t();        // call through initialized pointer
  51     t = test;   // re-assign pointer via non-lazy-poitner
  52     t();        // call agin through pointer
  53     test();     // call through stub
  54         if ( resolverCallCount != 1 )
  55                 FAIL("symbol-resolver-pointer: resolved called %d times", resolverCallCount);
  56         else if ( realTestCallCount != 3 )
  57                 FAIL("symbol-resolver-pointer: real test function called %d times", realTestCallCount);
  58         else
  59                 PASS("symbol-resolver-pointer");
  60 }
  61
  62
  63
  64