unit-tests/test-cases/dlsym-RTLD_NEXT/main.c

   1 /*
   2  * Copyright (c) 2005 Apple Computer, 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 #include <stdio.h>  // fprintf(), NULL
  24 #include <stdlib.h> // exit(), EXIT_SUCCESS
  25 #include <dlfcn.h>
  26
  27 #include "test.h" // PASS(), FAIL(), XPASS(), XFAIL()
  28
  29
  30 ///
  31 /// This process has five foo functions.  They are in:
  32 ///             main, test.bundle, test.dylib, foo1.dylib, foo2.dylib
  33 ///
  34 /// Both test.bundle and test.dylib call dlsym(RTLD_NEXT, "foo");
  35 /// They should find the ones in foo1.dylib and foo2.dylib respectively.
  36 /// We test this be looking up those symbols explictly.
  37 ///
  38
  39
  40 int foo()
  41 {
  42         return 0;
  43 }
  44
  45 typedef void* (*TestProc)(void);
  46
  47 static void trySO(const char* pathToLoad, const char* indirectLibrary)
  48 {
  49         void* indirectHandle = dlopen(indirectLibrary, RTLD_LAZY);
  50         if ( indirectHandle == NULL ) {
  51                 FAIL("dlopen(\"%s\") failed", indirectLibrary);
  52                 exit(0);
  53         }
  54
  55         void* indirectFoo = (TestProc)dlsym(indirectHandle, "foo");
  56         if ( indirectFoo == NULL ) {
  57                 FAIL("dlsym(handle, \"test\") failed");
  58                 exit(0);
  59         }
  60
  61         void* handle = dlopen(pathToLoad, RTLD_LAZY);
  62         if ( handle == NULL ) {
  63                 FAIL("dlopen(\"%s\") failed", pathToLoad);
  64                 exit(0);
  65         }
  66
  67         TestProc sym = (TestProc)dlsym(handle, "test");
  68         if ( sym == NULL ) {
  69                 FAIL("dlsym(handle, \"test\") failed");
  70                 exit(0);
  71         }
  72
  73         void* targetFoo = (*sym)();
  74
  75         //printf("targetFoo = %p, indirectFoo = %p\n", targetFoo, indirectFoo);
  76
  77         if ( targetFoo != indirectFoo ) {
  78                 FAIL("dlsym-RTLD_NEXT wrong foo found");
  79                 exit(0);
  80         }
  81
  82 }
  83
  84
  85
  86 int main()
  87 {
  88         trySO("test.bundle", "foo1.dylib");
  89         trySO("test.dylib", "foo2.dylib");
  90
  91         PASS("dlsym-RTLD_NEXT bundle and dylib");
  92         return EXIT_SUCCESS;
  93 }