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/**************************************************************************
*
* Copyright 2011 Jose Fonseca
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
**************************************************************************/
/*
* Provides access to real dlopen, as tracing libraries interpose it.
*/
#ifndef _DLOPEN_HPP_
#define _DLOPEN_HPP_
#include <dlfcn.h>
#include "os.hpp"
/*
* Invoke the true dlopen() function.
*/
static inline void *
_dlopen(const char *filename, int flag)
{
typedef void * (*PFN_DLOPEN)(const char *, int);
static PFN_DLOPEN dlopen_ptr = NULL;
if (!dlopen_ptr) {
#ifdef ANDROID
/* Android does not have dlopen in libdl.so; instead, the
* implementation is available in the dynamic linker itself.
* Oddly enough, we still can interpose it, but need to use
* RTLD_DEFAULT to get pointer to the original function. */
dlopen_ptr = (PFN_DLOPEN)dlsym(RTLD_DEFAULT, "dlopen");
#else
dlopen_ptr = (PFN_DLOPEN)dlsym(RTLD_NEXT, "dlopen");
#endif
if (!dlopen_ptr) {
os::log("apitrace: error: failed to look up real dlopen\n");
return NULL;
}
}
return dlopen_ptr(filename, flag);
}
#endif /* _DLOPEN_HPP_ */
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