You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
78 lines
2.5 KiB
78 lines
2.5 KiB
/* |
|
* 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_symlink_support.h" |
|
|
|
#include <gtest/gtest.h> |
|
|
|
#include <dlfcn.h> |
|
#include <libgen.h> |
|
#include <link.h> |
|
#include <unistd.h> |
|
|
|
#include <android-base/strings.h> |
|
|
|
#include <algorithm> |
|
#include <string> |
|
#include <vector> |
|
|
|
static const constexpr char* source_file_name = "libdlext_test.so"; |
|
static const constexpr char* symlink_name_prefix = "libdlext_test_"; |
|
|
|
static int dl_callback(struct dl_phdr_info *info, size_t /* size */, void *data) { |
|
// The case when path is not absolute and is equal to source_file_name |
|
// is disregarded intentionally since in bionic dlpi_name should always |
|
// be realpath to a shared object. |
|
const std::string suffix = std::string("/") + source_file_name; |
|
|
|
// TODO (dimitry): remove this check once fake libdl.so is gone |
|
if (info->dlpi_name == nullptr) { |
|
// This is linker imposing as libdl.so - skip it |
|
return 0; |
|
} |
|
|
|
if (android::base::EndsWith(info->dlpi_name, suffix.c_str())) { |
|
std::string* path = reinterpret_cast<std::string*>(data); |
|
*path = info->dlpi_name; |
|
return 1; // found |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
void create_dlfcn_test_symlink(const char* suffix, std::string* result) { |
|
void* handle = dlopen(source_file_name, RTLD_NOW); |
|
std::string source_file_path; |
|
|
|
ASSERT_TRUE(handle != nullptr) << dlerror(); |
|
ASSERT_TRUE(dl_iterate_phdr(dl_callback, &source_file_path) == 1) |
|
<< "dl_phdr_info for \"" << source_file_name << "\" was not found."; |
|
|
|
dlclose(handle); |
|
std::vector<char> buf; |
|
std::copy(source_file_path.begin(), source_file_path.end(), std::back_inserter(buf)); |
|
buf.push_back('\0'); |
|
|
|
std::string path_dir = dirname(&buf[0]); |
|
std::string link_path = path_dir + "/" + symlink_name_prefix + suffix + ".so"; |
|
|
|
ASSERT_TRUE(symlink(source_file_path.c_str(), link_path.c_str()) == 0) << strerror(errno); |
|
*result = link_path; |
|
} |
|
|
|
void remove_dlfcn_test_symlink(const std::string& path) { |
|
ASSERT_TRUE(unlink(path.c_str()) == 0) << strerror(errno); |
|
}
|
|
|