platform_bionic/tests/libs/check_rtld_next_from_library.cpp
Raj Mamadgi 527229cb72 Fix for dlfcn.rtld_next_from_library.
Using fclose to get the same address for the test assertion because
Samsung already uses LD_PRELOAD to intercept `close`.

Bug: http://b/67978141
Bug: http://b/68855476
Test: ran tests
Change-Id: I2da463e8b27e0db5cb1ba370d30f0402d7531396
Signed-off-by: Raj Mamadgi <r.mamadgi@samsung.com>
2017-11-03 15:00:09 -07:00

37 lines
1 KiB
C++

/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <dlfcn.h>
#include <stdio.h>
#include <stdlib.h>
static void* g_libc_fclose_ptr;
static void __attribute__((constructor)) __libc_fclose_lookup() {
g_libc_fclose_ptr = dlsym(RTLD_NEXT, "fclose");
}
// A libc function used for RTLD_NEXT.
// This function in not supposed to be called.
extern "C" int __attribute__((weak)) fclose(FILE*) {
abort();
}
extern "C" void* get_libc_fclose_ptr() {
return g_libc_fclose_ptr;
}