1 /**************************************************************************
3 * Copyright 2011 Jose Fonseca
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 **************************************************************************/
27 * Provides access to real dlopen, as tracing libraries interpose it.
39 * Invoke the true dlopen() function.
42 _dlopen(const char *filename, int flag)
44 typedef void * (*PFN_DLOPEN)(const char *, int);
45 static PFN_DLOPEN dlopen_ptr = NULL;
49 /* Android does not have dlopen in libdl.so; instead, the
50 * implementation is available in the dynamic linker itself.
51 * Oddly enough, we still can interpose it, but need to use
52 * RTLD_DEFAULT to get pointer to the original function. */
53 dlopen_ptr = (PFN_DLOPEN)dlsym(RTLD_DEFAULT, "dlopen");
55 dlopen_ptr = (PFN_DLOPEN)dlsym(RTLD_NEXT, "dlopen");
58 os::log("apitrace: error: failed to look up real dlopen\n");
63 return dlopen_ptr(filename, flag);
66 #endif /* _DLOPEN_HPP_ */