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/*
* Copyright (C) 2011 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_H_
#define ART_RUNTIME_OAT_H_
#include <array>
#include <vector>
#include "base/macros.h"
#include "base/safe_map.h"
#include "compiler_filter.h"
namespace art {
enum class InstructionSet;
class InstructionSetFeatures;
class PACKED(4) OatHeader {
public:
static constexpr std::array<uint8_t, 4> kOatMagic { { 'o', 'a', 't', '\n' } };
// Last oat version changed reason: Remove unused trampoline entrypoints.
static constexpr std::array<uint8_t, 4> kOatVersion { { '1', '7', '0', '\0' } };
static constexpr const char* kDex2OatCmdLineKey = "dex2oat-cmdline";
static constexpr const char* kDebuggableKey = "debuggable";
static constexpr const char* kNativeDebuggableKey = "native-debuggable";
static constexpr const char* kCompilerFilter = "compiler-filter";
static constexpr const char* kClassPathKey = "classpath";
static constexpr const char* kBootClassPathKey = "bootclasspath";
static constexpr const char* kBootClassPathChecksumsKey = "bootclasspath-checksums";
static constexpr const char* kConcurrentCopying = "concurrent-copying";
static constexpr const char* kCompilationReasonKey = "compilation-reason";
static constexpr const char kTrueValue[] = "true";
static constexpr const char kFalseValue[] = "false";
static OatHeader* Create(InstructionSet instruction_set,
const InstructionSetFeatures* instruction_set_features,
uint32_t dex_file_count,
const SafeMap<std::string, std::string>* variable_data);
bool IsValid() const;
std::string GetValidationErrorMessage() const;
static void CheckOatVersion(std::array<uint8_t, 4> version);
const char* GetMagic() const;
uint32_t GetChecksum() const;
void SetChecksum(uint32_t checksum);
uint32_t GetDexFileCount() const {
DCHECK(IsValid());
return dex_file_count_;
}
uint32_t GetOatDexFilesOffset() const;
void SetOatDexFilesOffset(uint32_t oat_dex_files_offset);
uint32_t GetExecutableOffset() const;
void SetExecutableOffset(uint32_t executable_offset);
const void* GetJniDlsymLookup() const;
uint32_t GetJniDlsymLookupOffset() const;
void SetJniDlsymLookupOffset(uint32_t offset);
const void* GetQuickGenericJniTrampoline() const;
uint32_t GetQuickGenericJniTrampolineOffset() const;
void SetQuickGenericJniTrampolineOffset(uint32_t offset);
const void* GetQuickResolutionTrampoline() const;
uint32_t GetQuickResolutionTrampolineOffset() const;
void SetQuickResolutionTrampolineOffset(uint32_t offset);
const void* GetQuickImtConflictTrampoline() const;
uint32_t GetQuickImtConflictTrampolineOffset() const;
void SetQuickImtConflictTrampolineOffset(uint32_t offset);
const void* GetQuickToInterpreterBridge() const;
uint32_t GetQuickToInterpreterBridgeOffset() const;
void SetQuickToInterpreterBridgeOffset(uint32_t offset);
InstructionSet GetInstructionSet() const;
uint32_t GetInstructionSetFeaturesBitmap() const;
uint32_t GetKeyValueStoreSize() const;
const uint8_t* GetKeyValueStore() const;
const char* GetStoreValueByKey(const char* key) const;
bool GetStoreKeyValuePairByIndex(size_t index, const char** key, const char** value) const;
size_t GetHeaderSize() const;
bool IsDebuggable() const;
bool IsNativeDebuggable() const;
CompilerFilter::Filter GetCompilerFilter() const;
bool IsConcurrentCopying() const;
private:
bool KeyHasValue(const char* key, const char* value, size_t value_size) const;
OatHeader(InstructionSet instruction_set,
const InstructionSetFeatures* instruction_set_features,
uint32_t dex_file_count,
const SafeMap<std::string, std::string>* variable_data);
// Returns true if the value of the given key is "true", false otherwise.
bool IsKeyEnabled(const char* key) const;
void Flatten(const SafeMap<std::string, std::string>* variable_data);
std::array<uint8_t, 4> magic_;
std::array<uint8_t, 4> version_;
uint32_t oat_checksum_;
InstructionSet instruction_set_;
uint32_t instruction_set_features_bitmap_;
uint32_t dex_file_count_;
uint32_t oat_dex_files_offset_;
uint32_t executable_offset_;
uint32_t jni_dlsym_lookup_offset_;
uint32_t quick_generic_jni_trampoline_offset_;
uint32_t quick_imt_conflict_trampoline_offset_;
uint32_t quick_resolution_trampoline_offset_;
uint32_t quick_to_interpreter_bridge_offset_;
uint32_t key_value_store_size_;
uint8_t key_value_store_[0]; // note variable width data at end
DISALLOW_COPY_AND_ASSIGN(OatHeader);
};
// OatMethodOffsets are currently 5x32-bits=160-bits long, so if we can
// save even one OatMethodOffsets struct, the more complicated encoding
// using a bitmap pays for itself since few classes will have 160
// methods.
enum OatClassType {
kOatClassAllCompiled = 0, // OatClass is followed by an OatMethodOffsets for each method.
kOatClassSomeCompiled = 1, // A bitmap of which OatMethodOffsets are present follows the OatClass.
kOatClassNoneCompiled = 2, // All methods are interpreted so no OatMethodOffsets are necessary.
kOatClassMax = 3,
};
std::ostream& operator<<(std::ostream& os, const OatClassType& rhs);
class PACKED(4) OatMethodOffsets {
public:
explicit OatMethodOffsets(uint32_t code_offset = 0);
~OatMethodOffsets();
OatMethodOffsets(const OatMethodOffsets&) = default;
OatMethodOffsets& operator=(const OatMethodOffsets&) = default;
uint32_t code_offset_;
};
} // namespace art
#endif // ART_RUNTIME_OAT_H_
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