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/*
* Copyright (C) 2022 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.
*/
#ifndef ART_RUNTIME_OAT_OAT_FILE_ASSISTANT_CONTEXT_H_
#define ART_RUNTIME_OAT_OAT_FILE_ASSISTANT_CONTEXT_H_
#include <optional>
#include <string>
#include <unordered_map>
#include <vector>
#include "arch/instruction_set.h"
#include "base/macros.h"
#include "runtime.h"
namespace art HIDDEN {
// A helper class for OatFileAssistant that fetches and caches information including boot image
// checksums, bootclasspath checksums, and APEX versions. The same instance can be reused across
// OatFileAssistant calls on different dex files for different instruction sets.
// This class is not thread-safe until `FetchAll` is called.
class OatFileAssistantContext {
public:
// Options that a runtime would take.
// Note that the struct only keeps references, so the caller must keep the objects alive during
// the lifetime of OatFileAssistant.
struct RuntimeOptions {
// Required. See `-Ximage`.
const std::vector<std::string>& image_locations;
// Required. See `-Xbootclasspath`.
const std::vector<std::string>& boot_class_path;
// Required. See `-Xbootclasspath-locations`.
const std::vector<std::string>& boot_class_path_locations;
// Optional. See `-Xbootclasspathfds`.
std::optional<ArrayRef<File>> boot_class_path_files = {};
// Optional. See `-Xdeny-art-apex-data-files`.
const bool deny_art_apex_data_files = false;
};
// Information about a boot image.
struct BootImageInfo {
// Number of BCP jars covered by the boot image.
size_t component_count;
// Checksum of the boot image. The format is "i;<component_count>/<checksum_in_8_digit_hex>"
std::string checksum;
};
// Constructs OatFileAssistantContext from runtime options. Does not fetch information on
// construction. Information will be fetched from disk when needed.
EXPORT explicit OatFileAssistantContext(std::unique_ptr<RuntimeOptions> runtime_options);
// Constructs OatFileAssistantContext from a runtime instance. Fetches as much information as
// possible from the runtime. The rest information will be fetched from disk when needed.
explicit OatFileAssistantContext(Runtime* runtime);
// Returns runtime options.
const RuntimeOptions& GetRuntimeOptions() const;
// Fetches all information that hasn't been fetched from disk and caches it. All operations will
// be read-only after a successful call to this function.
EXPORT bool FetchAll(std::string* error_msg);
// Returns information about the boot image of the given instruction set.
EXPORT const std::vector<BootImageInfo>& GetBootImageInfoList(InstructionSet isa);
// Returns the checksums of the dex files in the BCP jar at the given index, or nullptr on error.
// The format of each checksum is "/<checksum_in_8_digit_hex>".
const std::vector<std::string>* GetBcpChecksums(size_t bcp_index, std::string* error_msg);
// Returns a string that represents the apex versions of boot classpath jars. See
// `Runtime::apex_versions_` for the encoding format.
EXPORT const std::string& GetApexVersions();
private:
std::unique_ptr<RuntimeOptions> runtime_options_;
std::unordered_map<InstructionSet, std::vector<BootImageInfo>> boot_image_info_list_by_isa_;
std::unordered_map<size_t, std::vector<std::string>> bcp_checksums_by_index_;
std::optional<std::string> apex_versions_;
};
} // namespace art
#endif // ART_RUNTIME_OAT_OAT_FILE_ASSISTANT_CONTEXT_H_
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