blob: f75f0f7fdbf49554da40c2d3bf7de408a5487fbe [file] [log] [blame]
// Copyright 2019 The Cobalt Authors. All Rights Reserved.
//
// 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 "starboard/elf_loader/elf_loader.h"
#include <vector>
#include "starboard/atomic.h"
#include "starboard/common/log.h"
#include "starboard/configuration_constants.h"
#include "starboard/elf_loader/elf_loader_impl.h"
#include "starboard/elf_loader/evergreen_config.h"
#include "starboard/elf_loader/file_impl.h"
namespace starboard {
namespace elf_loader {
ElfLoader* ElfLoader::g_instance = NULL;
ElfLoader::ElfLoader() {
ElfLoader* old_instance =
reinterpret_cast<ElfLoader*>(SbAtomicAcquire_CompareAndSwapPtr(
reinterpret_cast<SbAtomicPtr*>(&g_instance),
reinterpret_cast<SbAtomicPtr>(reinterpret_cast<void*>(NULL)),
reinterpret_cast<SbAtomicPtr>(this)));
SB_DCHECK(!old_instance);
impl_.reset(new ElfLoaderImpl());
}
ElfLoader::~ElfLoader() {
ElfLoader* old_instance =
reinterpret_cast<ElfLoader*>(SbAtomicAcquire_CompareAndSwapPtr(
reinterpret_cast<SbAtomicPtr*>(&g_instance),
reinterpret_cast<SbAtomicPtr>(this),
reinterpret_cast<SbAtomicPtr>(reinterpret_cast<void*>(NULL))));
SB_DCHECK(old_instance);
SB_DCHECK(old_instance == this);
}
ElfLoader* ElfLoader::Get() {
ElfLoader* elf_loader = reinterpret_cast<ElfLoader*>(
SbAtomicAcquire_LoadPtr(reinterpret_cast<SbAtomicPtr*>(&g_instance)));
SB_DCHECK(elf_loader);
return elf_loader;
}
bool ElfLoader::Load(const std::string& library_path,
const std::string& content_path,
bool is_relative_path,
const void* (*custom_get_extension)(const char* name)) {
if (is_relative_path) {
library_path_ = MakeRelativeToContentPath(library_path);
content_path_ = MakeRelativeToContentPath(content_path);
} else {
library_path_ = library_path;
content_path_ = content_path;
}
if (library_path_.empty() || content_path_.empty()) {
SB_LOG(ERROR) << "|library_path_| and |content_path_| cannot be empty.";
return false;
}
EvergreenConfig::Create(library_path_.c_str(), content_path_.c_str(),
custom_get_extension);
SB_LOG(INFO) << "evergreen_config: content_path=" << content_path_;
SbTime start_time = SbTimeGetMonotonicNow();
bool res = impl_->Load(library_path_.c_str(), custom_get_extension);
SbTime end_time = SbTimeGetMonotonicNow();
SB_LOG(INFO) << "Loading took: "
<< (end_time - start_time) / kSbTimeMillisecond << " ms";
return res;
}
void* ElfLoader::LookupSymbol(const char* symbol) {
return impl_->LookupSymbol(symbol);
}
std::string ElfLoader::MakeRelativeToContentPath(const std::string& path) {
std::vector<char> content_path(kSbFileMaxPath);
if (!SbSystemGetPath(kSbSystemPathContentDirectory, content_path.data(),
kSbFileMaxPath)) {
SB_LOG(ERROR) << "Failed to make '" << path.data()
<< "' relative to the ELF Loader content directory.";
return "";
}
std::string relative_path(content_path.data());
relative_path.push_back(kSbFileSepChar);
relative_path.append(path);
return relative_path;
}
} // namespace elf_loader
} // namespace starboard