5248c5d72a
If someone is trying to use the sphal namespace, but it isn't available, we should probably fix this code or add an sphal namespace there or similar. Add log for more clarity. Bug: N/A Test: boot cuttlefish, this doesn't get logged Change-Id: I2fd2cddc90f529218c99ede8daf2891d84ceb94c
85 lines
2.6 KiB
C++
85 lines
2.6 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "vndksupport"
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#include "linker.h"
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#include <android/dlext.h>
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#include <dlfcn.h>
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#include <log/log.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <initializer_list>
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extern "C" android_namespace_t* android_get_exported_namespace(const char*);
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namespace {
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struct VendorNamespace {
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android_namespace_t* ptr = nullptr;
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const char* name = nullptr;
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};
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} // anonymous namespace
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static VendorNamespace get_vendor_namespace() {
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static VendorNamespace result = ([] {
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for (const char* name : {"sphal", "vendor", "default"}) {
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if (android_namespace_t* ns = android_get_exported_namespace(name)) {
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return VendorNamespace{ns, name};
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}
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}
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return VendorNamespace{};
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})();
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return result;
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}
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int android_is_in_vendor_process() {
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// Special case init, since when init runs, ld.config.<ver>.txt hasn't been
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// loaded (sysprop service isn't up for init to know <ver>).
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if (getpid() == 1) {
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return 0;
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}
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// In vendor process, 'vndk' namespace is not visible, whereas in system
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// process, it is.
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return android_get_exported_namespace("vndk") == nullptr;
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}
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void* android_load_sphal_library(const char* name, int flag) {
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VendorNamespace vendor_namespace = get_vendor_namespace();
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if (vendor_namespace.ptr != nullptr) {
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const android_dlextinfo dlextinfo = {
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.flags = ANDROID_DLEXT_USE_NAMESPACE,
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.library_namespace = vendor_namespace.ptr,
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};
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void* handle = android_dlopen_ext(name, flag, &dlextinfo);
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if (!handle) {
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ALOGE("Could not load %s from %s namespace: %s.", name, vendor_namespace.name,
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dlerror());
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}
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return handle;
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} else {
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ALOGW("Loading %s from current namespace instead of sphal namespace.", name);
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return dlopen(name, flag);
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}
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}
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int android_unload_sphal_library(void* handle) {
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return dlclose(handle);
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}
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