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* Copyright (C) 2012 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#include <string>
#include <stdint.h>
namespace art {
static constexpr uint32_t kAccPublic = 0x0001; // class, field, method, ic
static constexpr uint32_t kAccPrivate = 0x0002; // field, method, ic
static constexpr uint32_t kAccProtected = 0x0004; // field, method, ic
static constexpr uint32_t kAccStatic = 0x0008; // field, method, ic
static constexpr uint32_t kAccFinal = 0x0010; // class, field, method, ic
static constexpr uint32_t kAccSynchronized = 0x0020; // method (only allowed on natives)
static constexpr uint32_t kAccSuper = 0x0020; // class (not used in dex)
static constexpr uint32_t kAccVolatile = 0x0040; // field
static constexpr uint32_t kAccBridge = 0x0040; // method (1.5)
static constexpr uint32_t kAccTransient = 0x0080; // field
static constexpr uint32_t kAccVarargs = 0x0080; // method (1.5)
static constexpr uint32_t kAccNative = 0x0100; // method
static constexpr uint32_t kAccInterface = 0x0200; // class, ic
static constexpr uint32_t kAccAbstract = 0x0400; // class, method, ic
static constexpr uint32_t kAccStrict = 0x0800; // method
static constexpr uint32_t kAccSynthetic = 0x1000; // class, field, method, ic
static constexpr uint32_t kAccAnnotation = 0x2000; // class, ic (1.5)
static constexpr uint32_t kAccEnum = 0x4000; // class, field, ic (1.5)
static constexpr uint32_t kAccJavaFlagsMask = 0xffff; // bits set from Java sources (low 16)
static constexpr uint32_t kAccConstructor = 0x00010000; // method (dex only) <(cl)init>
static constexpr uint32_t kAccDeclaredSynchronized = 0x00020000; // method (dex only)
static constexpr uint32_t kAccClassIsProxy = 0x00040000; // class (dex only)
// Set to indicate that the ArtMethod is obsolete and has a different DexCache + DexFile from its
// declaring class. This flag may only be applied to methods.
static constexpr uint32_t kAccObsoleteMethod = 0x00040000; // method (runtime)
// Used by a method to denote that its execution does not need to go through slow path interpreter.
static constexpr uint32_t kAccSkipAccessChecks = 0x00080000; // method (runtime, not native)
static constexpr uint32_t kAccSkipHiddenapiChecks = 0x00100000; // class (runtime)
// Used by a class to denote that this class and any objects with this as a
// declaring-class/super-class are to be considered obsolete, meaning they should not be used by.
static constexpr uint32_t kAccObsoleteObject = 0x00200000; // class (runtime)
// Set during boot image compilation to indicate that the class is
// not initialized at compile tile and not in the list of preloaded classes.
static constexpr uint32_t kAccInBootImageAndNotInPreloadedClasses = 0x00400000; // class (runtime)
// This is set by the class linker during LinkInterfaceMethods. It is used by a method
// to represent that it was copied from its declaring class into another class.
// We need copies of the original method because the method may end up in different
// places in classes vtables, and the vtable index is set in ArtMethod.method_index.
// Default methods copied to a sub-interface or a concrete class shall have this bit set.
// Default conflict methods shall be marked as copied, abstract and default.
// Miranda methods shall be marked as copied and abstract but not default.
// We do not have intrinsics for any default methods and therefore intrinsics are never
// copied. We can therefore use a flag from the intrinsic flags range.
static constexpr uint32_t kAccCopied = 0x01000000; // method (runtime)
static constexpr uint32_t kAccDefault = 0x00400000; // method (runtime)
// Native method flags are set when linking the methods based on the presence of the
// @dalvik.annotation.optimization.{Fast,Critical}Native annotations with build visibility.
// Reuse the values of kAccSkipAccessChecks and kAccMiranda which are not used for native methods.
static constexpr uint32_t kAccFastNative = 0x00080000; // method (runtime; native only)
static constexpr uint32_t kAccCriticalNative = 0x00100000; // method (runtime; native only)
// Set by the JIT when clearing profiling infos to denote that a method was previously warm.
static constexpr uint32_t kAccPreviouslyWarm = 0x00800000; // method (runtime)
// Set by the verifier for a method we do not want the compiler to compile.
static constexpr uint32_t kAccCompileDontBother = 0x02000000; // method (runtime)
// Used in conjunction with kAccCompileDontBother to mark the method as pre compiled
// by the JIT compiler. We are reusing the value of the kAccPreviouslyWarm flag which
// is meaningless for other methods with kAccCompileDontBother as we do not collect
// samples for such methods.
static constexpr uint32_t kAccPreCompiled = 0x00800000; // method (runtime)
static_assert(kAccPreCompiled == kAccPreviouslyWarm);
// Set by the verifier for a method that could not be verified to follow structured locking.
static constexpr uint32_t kAccMustCountLocks = 0x04000000; // method (runtime)
// Set by the class linker for a method that has only one implementation for a
// virtual call.
static constexpr uint32_t kAccSingleImplementation = 0x08000000; // method (runtime)
// Whether nterp can take a fast path when entering this method (runtime; non-native)
static constexpr uint32_t kAccNterpEntryPointFastPathFlag = 0x00100000;
// Set by the class linker to mark that a method does not have floating points
// or longs in its shorty.
static constexpr uint32_t kAccNterpInvokeFastPathFlag = 0x00200000; // method (runtime)
static constexpr uint32_t kAccPublicApi = 0x10000000; // field, method
static constexpr uint32_t kAccCorePlatformApi = 0x20000000; // field, method
// For methods which we'd like to share memory between zygote and apps.
// Uses an intrinsic bit but that's OK as intrinsics are always in the boot image.
static constexpr uint32_t kAccMemorySharedMethod = 0x40000000;
// Set by the compiler driver when compiling boot classes with instrinsic methods.
static constexpr uint32_t kAccIntrinsic = 0x80000000; // method (runtime)
// Special runtime-only flags.
// Interface and all its super-interfaces with default methods have been recursively initialized.
static constexpr uint32_t kAccRecursivelyInitialized = 0x20000000;
// Interface declares some default method.
static constexpr uint32_t kAccHasDefaultMethod = 0x40000000;
// class/ancestor overrides finalize()
static constexpr uint32_t kAccClassIsFinalizable = 0x80000000;
static constexpr uint32_t kAccHiddenapiBits = kAccPublicApi | kAccCorePlatformApi;
// Continuous sequence of bits used to hold the ordinal of an intrinsic method. Flags
// which overlap are not valid when kAccIntrinsic is set.
static constexpr uint32_t kAccIntrinsicBits = kAccHiddenapiBits |
kAccSingleImplementation | kAccMustCountLocks | kAccCompileDontBother | kAccCopied |
kAccPreviouslyWarm | kAccMemorySharedMethod;
// Valid (meaningful) bits for a field.
static constexpr uint32_t kAccValidFieldFlags = kAccPublic | kAccPrivate | kAccProtected |
kAccStatic | kAccFinal | kAccVolatile | kAccTransient | kAccSynthetic | kAccEnum;
// Valid (meaningful) bits for a method.
static constexpr uint32_t kAccValidMethodFlags = kAccPublic | kAccPrivate | kAccProtected |
kAccStatic | kAccFinal | kAccSynchronized | kAccBridge | kAccVarargs | kAccNative |
kAccAbstract | kAccStrict | kAccSynthetic | kAccConstructor | kAccDeclaredSynchronized;
static_assert(((kAccIntrinsic | kAccIntrinsicBits) & kAccValidMethodFlags) == 0,
"Intrinsic bits and valid dex file method access flags must not overlap.");
// Valid (meaningful) bits for a class (not interface).
// Note 1. These are positive bits. Other bits may have to be zero.
// Note 2. Inner classes can expose more access flags to Java programs. That is handled by libcore.
static constexpr uint32_t kAccValidClassFlags = kAccPublic | kAccFinal | kAccSuper |
kAccAbstract | kAccSynthetic | kAccEnum;
// Valid (meaningful) bits for an interface.
// Note 1. Annotations are interfaces.
// Note 2. These are positive bits. Other bits may have to be zero.
// Note 3. Inner classes can expose more access flags to Java programs. That is handled by libcore.
static constexpr uint32_t kAccValidInterfaceFlags = kAccPublic | kAccInterface |
kAccAbstract | kAccSynthetic | kAccAnnotation;
static constexpr uint32_t kAccVisibilityFlags = kAccPublic | kAccPrivate | kAccProtected;
// Returns a human-readable version of the Java part of the access flags, e.g., "private static "
// (note the trailing whitespace).
std::string PrettyJavaAccessFlags(uint32_t access_flags);
} // namespace art