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android.js
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android.js
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const makeCodeAllocator = require('./alloc');
const {
jvmtiVersion,
jvmtiCapabilities,
EnvJvmti
} = require('./jvmti');
const { parseInstructionsAt } = require('./machine-code');
const memoize = require('./memoize');
const { checkJniResult, JNI_OK } = require('./result');
const VM = require('./vm');
const jsizeSize = 4;
const pointerSize = Process.pointerSize;
const {
readU32,
readPointer,
writeU32,
writePointer
} = NativePointer.prototype;
const kAccPublic = 0x0001;
const kAccStatic = 0x0008;
const kAccFinal = 0x0010;
const kAccNative = 0x0100;
const kAccFastNative = 0x00080000;
const kAccCriticalNative = 0x00200000;
const kAccFastInterpreterToInterpreterInvoke = 0x40000000;
const kAccSkipAccessChecks = 0x00080000;
const kAccSingleImplementation = 0x08000000;
const kAccNterpEntryPointFastPathFlag = 0x00100000;
const kAccNterpInvokeFastPathFlag = 0x00200000;
const kAccPublicApi = 0x10000000;
const kAccXposedHookedMethod = 0x10000000;
const kPointer = 0x0;
const kFullDeoptimization = 3;
const kSelectiveDeoptimization = 5;
const THUMB_BIT_REMOVAL_MASK = ptr(1).not();
const X86_JMP_MAX_DISTANCE = 0x7fffbfff;
const ARM64_ADRP_MAX_DISTANCE = 0xfffff000;
const ENV_VTABLE_OFFSET_EXCEPTION_CLEAR = 17 * pointerSize;
const ENV_VTABLE_OFFSET_FATAL_ERROR = 18 * pointerSize;
const DVM_JNI_ENV_OFFSET_SELF = 12;
const DVM_CLASS_OBJECT_OFFSET_VTABLE_COUNT = 112;
const DVM_CLASS_OBJECT_OFFSET_VTABLE = 116;
const DVM_OBJECT_OFFSET_CLAZZ = 0;
const DVM_METHOD_SIZE = 56;
const DVM_METHOD_OFFSET_ACCESS_FLAGS = 4;
const DVM_METHOD_OFFSET_METHOD_INDEX = 8;
const DVM_METHOD_OFFSET_REGISTERS_SIZE = 10;
const DVM_METHOD_OFFSET_OUTS_SIZE = 12;
const DVM_METHOD_OFFSET_INS_SIZE = 14;
const DVM_METHOD_OFFSET_SHORTY = 28;
const DVM_METHOD_OFFSET_JNI_ARG_INFO = 36;
const DALVIK_JNI_RETURN_VOID = 0;
const DALVIK_JNI_RETURN_FLOAT = 1;
const DALVIK_JNI_RETURN_DOUBLE = 2;
const DALVIK_JNI_RETURN_S8 = 3;
const DALVIK_JNI_RETURN_S4 = 4;
const DALVIK_JNI_RETURN_S2 = 5;
const DALVIK_JNI_RETURN_U2 = 6;
const DALVIK_JNI_RETURN_S1 = 7;
const DALVIK_JNI_NO_ARG_INFO = 0x80000000;
const DALVIK_JNI_RETURN_SHIFT = 28;
const STD_STRING_SIZE = 3 * pointerSize;
const STD_VECTOR_SIZE = 3 * pointerSize;
const AF_UNIX = 1;
const SOCK_STREAM = 1;
const getArtRuntimeSpec = memoize(_getArtRuntimeSpec);
const getArtInstrumentationSpec = memoize(_getArtInstrumentationSpec);
const getArtMethodSpec = memoize(_getArtMethodSpec);
const getArtThreadSpec = memoize(_getArtThreadSpec);
const getArtManagedStackSpec = memoize(_getArtManagedStackSpec);
const getArtThreadStateTransitionImpl = memoize(_getArtThreadStateTransitionImpl);
const getAndroidVersion = memoize(_getAndroidVersion);
const getAndroidCodename = memoize(_getAndroidCodename);
const getAndroidApiLevel = memoize(_getAndroidApiLevel);
const getArtQuickFrameInfoGetterThunk = memoize(_getArtQuickFrameInfoGetterThunk);
const makeCxxMethodWrapperReturningPointerByValue =
(Process.arch === 'ia32')
? makeCxxMethodWrapperReturningPointerByValueInFirstArg
: makeCxxMethodWrapperReturningPointerByValueGeneric;
const nativeFunctionOptions = {
exceptions: 'propagate'
};
const artThreadStateTransitions = {};
let cachedApi = null;
let cachedArtClassLinkerSpec = null;
let MethodMangler = null;
let artController = null;
const inlineHooks = [];
const patchedClasses = new Map();
const artQuickInterceptors = [];
let thunkPage = null;
let thunkOffset = 0;
let taughtArtAboutReplacementMethods = false;
let taughtArtAboutMethodInstrumentation = false;
let backtraceModule = null;
const jdwpSessions = [];
let socketpair = null;
let trampolineAllocator = null;
function getApi () {
if (cachedApi === null) {
cachedApi = _getApi();
}
return cachedApi;
}
function _getApi () {
const vmModules = Process.enumerateModules()
.filter(m => /^lib(art|dvm).so$/.test(m.name))
.filter(m => !/\/system\/fake-libs/.test(m.path));
if (vmModules.length === 0) {
return null;
}
const vmModule = vmModules[0];
const flavor = (vmModule.name.indexOf('art') !== -1) ? 'art' : 'dalvik';
const isArt = flavor === 'art';
const temporaryApi = {
module: vmModule,
flavor,
addLocalReference: null
};
const pending = isArt
? [{
module: vmModule.path,
functions: {
JNI_GetCreatedJavaVMs: ['JNI_GetCreatedJavaVMs', 'int', ['pointer', 'int', 'pointer']],
// Android < 7
artInterpreterToCompiledCodeBridge: function (address) {
this.artInterpreterToCompiledCodeBridge = address;
},
// Android >= 8
_ZN3art9JavaVMExt12AddGlobalRefEPNS_6ThreadENS_6ObjPtrINS_6mirror6ObjectEEE: ['art::JavaVMExt::AddGlobalRef', 'pointer', ['pointer', 'pointer', 'pointer']],
// Android >= 6
_ZN3art9JavaVMExt12AddGlobalRefEPNS_6ThreadEPNS_6mirror6ObjectE: ['art::JavaVMExt::AddGlobalRef', 'pointer', ['pointer', 'pointer', 'pointer']],
// Android < 6: makeAddGlobalRefFallbackForAndroid5() needs these:
_ZN3art17ReaderWriterMutex13ExclusiveLockEPNS_6ThreadE: ['art::ReaderWriterMutex::ExclusiveLock', 'void', ['pointer', 'pointer']],
_ZN3art17ReaderWriterMutex15ExclusiveUnlockEPNS_6ThreadE: ['art::ReaderWriterMutex::ExclusiveUnlock', 'void', ['pointer', 'pointer']],
// Android <= 7
_ZN3art22IndirectReferenceTable3AddEjPNS_6mirror6ObjectE: function (address) {
this['art::IndirectReferenceTable::Add'] = new NativeFunction(address, 'pointer', ['pointer', 'uint', 'pointer'], nativeFunctionOptions);
},
// Android > 7
_ZN3art22IndirectReferenceTable3AddENS_15IRTSegmentStateENS_6ObjPtrINS_6mirror6ObjectEEE: function (address) {
this['art::IndirectReferenceTable::Add'] = new NativeFunction(address, 'pointer', ['pointer', 'uint', 'pointer'], nativeFunctionOptions);
},
// Android >= 7
_ZN3art9JavaVMExt12DecodeGlobalEPv: function (address) {
let decodeGlobal;
if (getAndroidApiLevel() >= 26) {
// Returns ObjPtr<mirror::Object>
decodeGlobal = makeCxxMethodWrapperReturningPointerByValue(address, ['pointer', 'pointer']);
} else {
// Returns mirror::Object *
decodeGlobal = new NativeFunction(address, 'pointer', ['pointer', 'pointer'], nativeFunctionOptions);
}
this['art::JavaVMExt::DecodeGlobal'] = function (vm, thread, ref) {
return decodeGlobal(vm, ref);
};
},
// Android >= 6
_ZN3art9JavaVMExt12DecodeGlobalEPNS_6ThreadEPv: ['art::JavaVMExt::DecodeGlobal', 'pointer', ['pointer', 'pointer', 'pointer']],
// Android < 6: makeDecodeGlobalFallbackForAndroid5() fallback uses:
_ZNK3art6Thread13DecodeJObjectEP8_jobject: ['art::Thread::DecodeJObject', 'pointer', ['pointer', 'pointer']],
// Android >= 6
_ZN3art10ThreadList10SuspendAllEPKcb: ['art::ThreadList::SuspendAll', 'void', ['pointer', 'pointer', 'bool']],
// or fallback:
_ZN3art10ThreadList10SuspendAllEv: function (address) {
const suspendAll = new NativeFunction(address, 'void', ['pointer'], nativeFunctionOptions);
this['art::ThreadList::SuspendAll'] = function (threadList, cause, longSuspend) {
return suspendAll(threadList);
};
},
_ZN3art10ThreadList9ResumeAllEv: ['art::ThreadList::ResumeAll', 'void', ['pointer']],
// Android >= 7
_ZN3art11ClassLinker12VisitClassesEPNS_12ClassVisitorE: ['art::ClassLinker::VisitClasses', 'void', ['pointer', 'pointer']],
// Android < 7
_ZN3art11ClassLinker12VisitClassesEPFbPNS_6mirror5ClassEPvES4_: function (address) {
const visitClasses = new NativeFunction(address, 'void', ['pointer', 'pointer', 'pointer'], nativeFunctionOptions);
this['art::ClassLinker::VisitClasses'] = function (classLinker, visitor) {
visitClasses(classLinker, visitor, NULL);
};
},
_ZNK3art11ClassLinker17VisitClassLoadersEPNS_18ClassLoaderVisitorE: ['art::ClassLinker::VisitClassLoaders', 'void', ['pointer', 'pointer']],
_ZN3art2gc4Heap12VisitObjectsEPFvPNS_6mirror6ObjectEPvES5_: ['art::gc::Heap::VisitObjects', 'void', ['pointer', 'pointer', 'pointer']],
_ZN3art2gc4Heap12GetInstancesERNS_24VariableSizedHandleScopeENS_6HandleINS_6mirror5ClassEEEiRNSt3__16vectorINS4_INS5_6ObjectEEENS8_9allocatorISB_EEEE: ['art::gc::Heap::GetInstances', 'void', ['pointer', 'pointer', 'pointer', 'int', 'pointer']],
// Android >= 9
_ZN3art2gc4Heap12GetInstancesERNS_24VariableSizedHandleScopeENS_6HandleINS_6mirror5ClassEEEbiRNSt3__16vectorINS4_INS5_6ObjectEEENS8_9allocatorISB_EEEE: function (address) {
const getInstances = new NativeFunction(address, 'void', ['pointer', 'pointer', 'pointer', 'bool', 'int', 'pointer'], nativeFunctionOptions);
this['art::gc::Heap::GetInstances'] = function (instance, scope, hClass, maxCount, instances) {
const useIsAssignableFrom = 0;
getInstances(instance, scope, hClass, useIsAssignableFrom, maxCount, instances);
};
},
_ZN3art12StackVisitorC2EPNS_6ThreadEPNS_7ContextENS0_13StackWalkKindEjb: ['art::StackVisitor::StackVisitor', 'void', ['pointer', 'pointer', 'pointer', 'uint', 'uint', 'bool']],
_ZN3art12StackVisitorC2EPNS_6ThreadEPNS_7ContextENS0_13StackWalkKindEmb: ['art::StackVisitor::StackVisitor', 'void', ['pointer', 'pointer', 'pointer', 'uint', 'size_t', 'bool']],
_ZN3art12StackVisitor9WalkStackILNS0_16CountTransitionsE0EEEvb: ['art::StackVisitor::WalkStack', 'void', ['pointer', 'bool']],
_ZNK3art12StackVisitor9GetMethodEv: ['art::StackVisitor::GetMethod', 'pointer', ['pointer']],
_ZNK3art12StackVisitor16DescribeLocationEv: function (address) {
this['art::StackVisitor::DescribeLocation'] = makeCxxMethodWrapperReturningStdStringByValue(address, ['pointer']);
},
_ZNK3art12StackVisitor24GetCurrentQuickFrameInfoEv: function (address) {
this['art::StackVisitor::GetCurrentQuickFrameInfo'] = makeArtQuickFrameInfoGetter(address);
},
_ZN3art6Thread18GetLongJumpContextEv: ['art::Thread::GetLongJumpContext', 'pointer', ['pointer']],
_ZN3art6mirror5Class13GetDescriptorEPNSt3__112basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE: function (address) {
this['art::mirror::Class::GetDescriptor'] = address;
},
_ZN3art6mirror5Class11GetLocationEv: function (address) {
this['art::mirror::Class::GetLocation'] = makeCxxMethodWrapperReturningStdStringByValue(address, ['pointer']);
},
_ZN3art9ArtMethod12PrettyMethodEb: function (address) {
this['art::ArtMethod::PrettyMethod'] = makeCxxMethodWrapperReturningStdStringByValue(address, ['pointer', 'bool']);
},
_ZN3art12PrettyMethodEPNS_9ArtMethodEb: function (address) {
this['art::ArtMethod::PrettyMethodNullSafe'] = makeCxxMethodWrapperReturningStdStringByValue(address, ['pointer', 'bool']);
},
// Android < 6 for cloneArtMethod()
_ZN3art6Thread14CurrentFromGdbEv: ['art::Thread::CurrentFromGdb', 'pointer', []],
_ZN3art6mirror6Object5CloneEPNS_6ThreadE: function (address) {
this['art::mirror::Object::Clone'] = new NativeFunction(address, 'pointer', ['pointer', 'pointer'], nativeFunctionOptions);
},
_ZN3art6mirror6Object5CloneEPNS_6ThreadEm: function (address) {
const clone = new NativeFunction(address, 'pointer', ['pointer', 'pointer', 'pointer'], nativeFunctionOptions);
this['art::mirror::Object::Clone'] = function (thisPtr, threadPtr) {
const numTargetBytes = NULL;
return clone(thisPtr, threadPtr, numTargetBytes);
};
},
_ZN3art6mirror6Object5CloneEPNS_6ThreadEj: function (address) {
const clone = new NativeFunction(address, 'pointer', ['pointer', 'pointer', 'uint'], nativeFunctionOptions);
this['art::mirror::Object::Clone'] = function (thisPtr, threadPtr) {
const numTargetBytes = 0;
return clone(thisPtr, threadPtr, numTargetBytes);
};
},
_ZN3art3Dbg14SetJdwpAllowedEb: ['art::Dbg::SetJdwpAllowed', 'void', ['bool']],
_ZN3art3Dbg13ConfigureJdwpERKNS_4JDWP11JdwpOptionsE: ['art::Dbg::ConfigureJdwp', 'void', ['pointer']],
_ZN3art31InternalDebuggerControlCallback13StartDebuggerEv: ['art::InternalDebuggerControlCallback::StartDebugger', 'void', ['pointer']],
_ZN3art3Dbg9StartJdwpEv: ['art::Dbg::StartJdwp', 'void', []],
_ZN3art3Dbg8GoActiveEv: ['art::Dbg::GoActive', 'void', []],
_ZN3art3Dbg21RequestDeoptimizationERKNS_21DeoptimizationRequestE: ['art::Dbg::RequestDeoptimization', 'void', ['pointer']],
_ZN3art3Dbg20ManageDeoptimizationEv: ['art::Dbg::ManageDeoptimization', 'void', []],
_ZN3art15instrumentation15Instrumentation20EnableDeoptimizationEv: ['art::Instrumentation::EnableDeoptimization', 'void', ['pointer']],
// Android >= 6
_ZN3art15instrumentation15Instrumentation20DeoptimizeEverythingEPKc: ['art::Instrumentation::DeoptimizeEverything', 'void', ['pointer', 'pointer']],
// Android < 6
_ZN3art15instrumentation15Instrumentation20DeoptimizeEverythingEv: function (address) {
const deoptimize = new NativeFunction(address, 'void', ['pointer'], nativeFunctionOptions);
this['art::Instrumentation::DeoptimizeEverything'] = function (instrumentation, key) {
deoptimize(instrumentation);
};
},
_ZN3art7Runtime19DeoptimizeBootImageEv: ['art::Runtime::DeoptimizeBootImage', 'void', ['pointer']],
_ZN3art15instrumentation15Instrumentation10DeoptimizeEPNS_9ArtMethodE: ['art::Instrumentation::Deoptimize', 'void', ['pointer', 'pointer']],
// Android >= 11
_ZN3art3jni12JniIdManager14DecodeMethodIdEP10_jmethodID: ['art::jni::JniIdManager::DecodeMethodId', 'pointer', ['pointer', 'pointer']],
_ZN3art11interpreter18GetNterpEntryPointEv: ['art::interpreter::GetNterpEntryPoint', 'pointer', []],
_ZN3art7Monitor17TranslateLocationEPNS_9ArtMethodEjPPKcPi: ['art::Monitor::TranslateLocation', 'void', ['pointer', 'uint32', 'pointer', 'pointer']]
},
variables: {
_ZN3art3Dbg9gRegistryE: function (address) {
this.isJdwpStarted = () => !address.readPointer().isNull();
},
_ZN3art3Dbg15gDebuggerActiveE: function (address) {
this.isDebuggerActive = () => !!address.readU8();
}
},
optionals: [
'artInterpreterToCompiledCodeBridge',
'_ZN3art9JavaVMExt12AddGlobalRefEPNS_6ThreadENS_6ObjPtrINS_6mirror6ObjectEEE',
'_ZN3art9JavaVMExt12AddGlobalRefEPNS_6ThreadEPNS_6mirror6ObjectE',
'_ZN3art9JavaVMExt12DecodeGlobalEPv',
'_ZN3art9JavaVMExt12DecodeGlobalEPNS_6ThreadEPv',
'_ZNK3art6Thread13DecodeJObjectEP8_jobject',
'_ZN3art10ThreadList10SuspendAllEPKcb',
'_ZN3art10ThreadList10SuspendAllEv',
'_ZN3art11ClassLinker12VisitClassesEPNS_12ClassVisitorE',
'_ZN3art11ClassLinker12VisitClassesEPFbPNS_6mirror5ClassEPvES4_',
'_ZNK3art11ClassLinker17VisitClassLoadersEPNS_18ClassLoaderVisitorE',
'_ZN3art6mirror6Object5CloneEPNS_6ThreadE',
'_ZN3art6mirror6Object5CloneEPNS_6ThreadEm',
'_ZN3art6mirror6Object5CloneEPNS_6ThreadEj',
'_ZN3art22IndirectReferenceTable3AddEjPNS_6mirror6ObjectE',
'_ZN3art22IndirectReferenceTable3AddENS_15IRTSegmentStateENS_6ObjPtrINS_6mirror6ObjectEEE',
'_ZN3art2gc4Heap12VisitObjectsEPFvPNS_6mirror6ObjectEPvES5_',
'_ZN3art2gc4Heap12GetInstancesERNS_24VariableSizedHandleScopeENS_6HandleINS_6mirror5ClassEEEiRNSt3__16vectorINS4_INS5_6ObjectEEENS8_9allocatorISB_EEEE',
'_ZN3art2gc4Heap12GetInstancesERNS_24VariableSizedHandleScopeENS_6HandleINS_6mirror5ClassEEEbiRNSt3__16vectorINS4_INS5_6ObjectEEENS8_9allocatorISB_EEEE',
'_ZN3art12StackVisitorC2EPNS_6ThreadEPNS_7ContextENS0_13StackWalkKindEjb',
'_ZN3art12StackVisitorC2EPNS_6ThreadEPNS_7ContextENS0_13StackWalkKindEmb',
'_ZN3art12StackVisitor9WalkStackILNS0_16CountTransitionsE0EEEvb',
'_ZNK3art12StackVisitor9GetMethodEv',
'_ZNK3art12StackVisitor16DescribeLocationEv',
'_ZNK3art12StackVisitor24GetCurrentQuickFrameInfoEv',
'_ZN3art6Thread18GetLongJumpContextEv',
'_ZN3art6mirror5Class13GetDescriptorEPNSt3__112basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE',
'_ZN3art6mirror5Class11GetLocationEv',
'_ZN3art9ArtMethod12PrettyMethodEb',
'_ZN3art12PrettyMethodEPNS_9ArtMethodEb',
'_ZN3art3Dbg13ConfigureJdwpERKNS_4JDWP11JdwpOptionsE',
'_ZN3art31InternalDebuggerControlCallback13StartDebuggerEv',
'_ZN3art3Dbg15gDebuggerActiveE',
'_ZN3art15instrumentation15Instrumentation20EnableDeoptimizationEv',
'_ZN3art15instrumentation15Instrumentation20DeoptimizeEverythingEPKc',
'_ZN3art15instrumentation15Instrumentation20DeoptimizeEverythingEv',
'_ZN3art7Runtime19DeoptimizeBootImageEv',
'_ZN3art15instrumentation15Instrumentation10DeoptimizeEPNS_9ArtMethodE',
'_ZN3art3Dbg9StartJdwpEv',
'_ZN3art3Dbg8GoActiveEv',
'_ZN3art3Dbg21RequestDeoptimizationERKNS_21DeoptimizationRequestE',
'_ZN3art3Dbg20ManageDeoptimizationEv',
'_ZN3art3Dbg9gRegistryE',
'_ZN3art3jni12JniIdManager14DecodeMethodIdEP10_jmethodID',
'_ZN3art11interpreter18GetNterpEntryPointEv',
'_ZN3art7Monitor17TranslateLocationEPNS_9ArtMethodEjPPKcPi'
]
}]
: [{
module: vmModule.path,
functions: {
_Z20dvmDecodeIndirectRefP6ThreadP8_jobject: ['dvmDecodeIndirectRef', 'pointer', ['pointer', 'pointer']],
_Z15dvmUseJNIBridgeP6MethodPv: ['dvmUseJNIBridge', 'void', ['pointer', 'pointer']],
_Z20dvmHeapSourceGetBasev: ['dvmHeapSourceGetBase', 'pointer', []],
_Z21dvmHeapSourceGetLimitv: ['dvmHeapSourceGetLimit', 'pointer', []],
_Z16dvmIsValidObjectPK6Object: ['dvmIsValidObject', 'uint8', ['pointer']],
JNI_GetCreatedJavaVMs: ['JNI_GetCreatedJavaVMs', 'int', ['pointer', 'int', 'pointer']]
},
variables: {
gDvmJni: function (address) {
this.gDvmJni = address;
},
gDvm: function (address) {
this.gDvm = address;
}
}
}];
const missing = [];
pending.forEach(function (api) {
const functions = api.functions || {};
const variables = api.variables || {};
const optionals = new Set(api.optionals || []);
const exportByName = Module
.enumerateExports(api.module)
.reduce(function (result, exp) {
result[exp.name] = exp;
return result;
}, {});
Object.keys(functions)
.forEach(function (name) {
const exp = exportByName[name];
if (exp !== undefined && exp.type === 'function') {
const signature = functions[name];
if (typeof signature === 'function') {
signature.call(temporaryApi, exp.address);
} else {
temporaryApi[signature[0]] = new NativeFunction(exp.address, signature[1], signature[2], nativeFunctionOptions);
}
} else {
if (!optionals.has(name)) {
missing.push(name);
}
}
});
Object.keys(variables)
.forEach(function (name) {
const exp = exportByName[name];
if (exp !== undefined && exp.type === 'variable') {
const handler = variables[name];
handler.call(temporaryApi, exp.address);
} else {
if (!optionals.has(name)) {
missing.push(name);
}
}
});
});
if (missing.length > 0) {
throw new Error('Java API only partially available; please file a bug. Missing: ' + missing.join(', '));
}
const vms = Memory.alloc(pointerSize);
const vmCount = Memory.alloc(jsizeSize);
checkJniResult('JNI_GetCreatedJavaVMs', temporaryApi.JNI_GetCreatedJavaVMs(vms, 1, vmCount));
if (vmCount.readInt() === 0) {
return null;
}
temporaryApi.vm = vms.readPointer();
if (isArt) {
const apiLevel = getAndroidApiLevel();
let kAccCompileDontBother;
if (apiLevel >= 27) {
kAccCompileDontBother = 0x02000000;
} else if (apiLevel >= 24) {
kAccCompileDontBother = 0x01000000;
} else {
kAccCompileDontBother = 0;
}
temporaryApi.kAccCompileDontBother = kAccCompileDontBother;
const artRuntime = temporaryApi.vm.add(pointerSize).readPointer();
temporaryApi.artRuntime = artRuntime;
const runtimeSpec = getArtRuntimeSpec(temporaryApi);
const runtimeOffset = runtimeSpec.offset;
const instrumentationOffset = runtimeOffset.instrumentation;
temporaryApi.artInstrumentation = (instrumentationOffset !== null) ? artRuntime.add(instrumentationOffset) : null;
temporaryApi.artHeap = artRuntime.add(runtimeOffset.heap).readPointer();
temporaryApi.artThreadList = artRuntime.add(runtimeOffset.threadList).readPointer();
/*
* We must use the *correct* copy (or address) of art_quick_generic_jni_trampoline
* in order for the stack trace to recognize the JNI stub quick frame.
*
* For ARTs for Android 6.x we can just use the JNI trampoline built into ART.
*/
const classLinker = artRuntime.add(runtimeOffset.classLinker).readPointer();
const classLinkerOffsets = getArtClassLinkerSpec(artRuntime, runtimeSpec).offset;
const quickResolutionTrampoline = classLinker.add(classLinkerOffsets.quickResolutionTrampoline).readPointer();
const quickImtConflictTrampoline = classLinker.add(classLinkerOffsets.quickImtConflictTrampoline).readPointer();
const quickGenericJniTrampoline = classLinker.add(classLinkerOffsets.quickGenericJniTrampoline).readPointer();
const quickToInterpreterBridgeTrampoline = classLinker.add(classLinkerOffsets.quickToInterpreterBridgeTrampoline).readPointer();
temporaryApi.artClassLinker = {
address: classLinker,
quickResolutionTrampoline,
quickImtConflictTrampoline,
quickGenericJniTrampoline,
quickToInterpreterBridgeTrampoline
};
const vm = new VM(temporaryApi);
temporaryApi.artQuickGenericJniTrampoline = getArtQuickEntrypointFromTrampoline(quickGenericJniTrampoline, vm);
temporaryApi.artQuickToInterpreterBridge = getArtQuickEntrypointFromTrampoline(quickToInterpreterBridgeTrampoline, vm);
if (temporaryApi['art::JavaVMExt::AddGlobalRef'] === undefined) {
temporaryApi['art::JavaVMExt::AddGlobalRef'] = makeAddGlobalRefFallbackForAndroid5(temporaryApi);
}
if (temporaryApi['art::JavaVMExt::DecodeGlobal'] === undefined) {
temporaryApi['art::JavaVMExt::DecodeGlobal'] = makeDecodeGlobalFallbackForAndroid5(temporaryApi);
}
if (temporaryApi['art::ArtMethod::PrettyMethod'] === undefined) {
temporaryApi['art::ArtMethod::PrettyMethod'] = temporaryApi['art::ArtMethod::PrettyMethodNullSafe'];
}
if (temporaryApi['art::interpreter::GetNterpEntryPoint'] !== undefined) {
temporaryApi.artNterpEntryPoint = temporaryApi['art::interpreter::GetNterpEntryPoint']();
}
artController = makeArtController(vm);
fixupArtQuickDeliverExceptionBug(temporaryApi);
let cachedJvmti = null;
Object.defineProperty(temporaryApi, 'jvmti', {
get () {
if (cachedJvmti === null) {
cachedJvmti = [tryGetEnvJvmti(vm, this.artRuntime)];
}
return cachedJvmti[0];
}
});
}
const cxxImports = Module.enumerateImports(vmModule.path)
.filter(imp => imp.name.indexOf('_Z') === 0)
.reduce((result, imp) => {
result[imp.name] = imp.address;
return result;
}, {});
temporaryApi.$new = new NativeFunction(cxxImports._Znwm || cxxImports._Znwj, 'pointer', ['ulong'], nativeFunctionOptions);
temporaryApi.$delete = new NativeFunction(cxxImports._ZdlPv, 'void', ['pointer'], nativeFunctionOptions);
MethodMangler = isArt ? ArtMethodMangler : DalvikMethodMangler;
return temporaryApi;
}
function tryGetEnvJvmti (vm, runtime) {
let env = null;
vm.perform(() => {
const ensurePluginLoaded = new NativeFunction(
Module.getExportByName('libart.so', '_ZN3art7Runtime18EnsurePluginLoadedEPKcPNSt3__112basic_stringIcNS3_11char_traitsIcEENS3_9allocatorIcEEEE'),
'bool',
['pointer', 'pointer', 'pointer']);
const errorPtr = Memory.alloc(pointerSize);
const success = ensurePluginLoaded(runtime, Memory.allocUtf8String('libopenjdkjvmti.so'), errorPtr);
if (!success) {
// FIXME: Avoid leaking error
return;
}
const kArtTiVersion = jvmtiVersion.v1_2 | 0x40000000;
const handle = vm.tryGetEnvHandle(kArtTiVersion);
if (handle === null) {
return;
}
env = new EnvJvmti(handle, vm);
const capaBuf = Memory.alloc(8);
capaBuf.writeU64(jvmtiCapabilities.canTagObjects);
const result = env.addCapabilities(capaBuf);
if (result !== JNI_OK) {
env = null;
}
});
return env;
}
function ensureClassInitialized (env, classRef) {
const api = getApi();
if (api.flavor !== 'art') {
return;
}
env.getFieldId(classRef, 'x', 'Z');
env.exceptionClear();
}
function getArtVMSpec (api) {
return {
offset: (pointerSize === 4)
? {
globalsLock: 32,
globals: 72
}
: {
globalsLock: 64,
globals: 112
}
};
}
function _getArtRuntimeSpec (api) {
/*
* class Runtime {
* ...
* gc::Heap* heap_; <-- we need to find this
* std::unique_ptr<ArenaPool> jit_arena_pool_; <----- API level >= 24
* std::unique_ptr<ArenaPool> arena_pool_; __
* std::unique_ptr<ArenaPool> low_4gb_arena_pool_; <--|__ API level >= 23
* std::unique_ptr<LinearAlloc> linear_alloc_; \_
* size_t max_spins_before_thin_lock_inflation_;
* MonitorList* monitor_list_;
* MonitorPool* monitor_pool_;
* ThreadList* thread_list_; <--- and these
* InternTable* intern_table_; <--/
* ClassLinker* class_linker_; <-/
* SignalCatcher* signal_catcher_;
* SmallIrtAllocator* small_irt_allocator_; <------------ API level >= 33 or Android Tiramisu Developer Preview
* std::unique_ptr<jni::JniIdManager> jni_id_manager_; <- API level >= 30 or Android R Developer Preview
* bool use_tombstoned_traces_; <-------------------- API level 27/28
* std::string stack_trace_file_; <-------------------- API level <= 28
* JavaVMExt* java_vm_; <-- so we find this then calculate our way backwards
* ...
* }
*/
const vm = api.vm;
const runtime = api.artRuntime;
const startOffset = (pointerSize === 4) ? 200 : 384;
const endOffset = startOffset + (100 * pointerSize);
const apiLevel = getAndroidApiLevel();
const codename = getAndroidCodename();
let spec = null;
for (let offset = startOffset; offset !== endOffset; offset += pointerSize) {
const value = runtime.add(offset).readPointer();
if (value.equals(vm)) {
let classLinkerOffsets;
let jniIdManagerOffset = null;
if (apiLevel >= 33 || codename === 'Tiramisu') {
classLinkerOffsets = [offset - (4 * pointerSize)];
jniIdManagerOffset = offset - pointerSize;
} else if (apiLevel >= 30 || codename === 'R') {
classLinkerOffsets = [offset - (3 * pointerSize), offset - (4 * pointerSize)];
jniIdManagerOffset = offset - pointerSize;
} else if (apiLevel >= 29) {
classLinkerOffsets = [offset - (2 * pointerSize)];
} else if (apiLevel >= 27) {
classLinkerOffsets = [offset - STD_STRING_SIZE - (3 * pointerSize)];
} else {
classLinkerOffsets = [offset - STD_STRING_SIZE - (2 * pointerSize)];
}
for (const classLinkerOffset of classLinkerOffsets) {
const internTableOffset = classLinkerOffset - pointerSize;
const threadListOffset = internTableOffset - pointerSize;
let heapOffset;
if (apiLevel >= 24) {
heapOffset = threadListOffset - (8 * pointerSize);
} else if (apiLevel >= 23) {
heapOffset = threadListOffset - (7 * pointerSize);
} else {
heapOffset = threadListOffset - (4 * pointerSize);
}
const candidate = {
offset: {
heap: heapOffset,
threadList: threadListOffset,
internTable: internTableOffset,
classLinker: classLinkerOffset,
jniIdManager: jniIdManagerOffset
}
};
if (tryGetArtClassLinkerSpec(runtime, candidate) !== null) {
spec = candidate;
break;
}
}
break;
}
}
if (spec === null) {
throw new Error('Unable to determine Runtime field offsets');
}
spec.offset.instrumentation = tryDetectInstrumentationOffset(api);
spec.offset.jniIdsIndirection = tryDetectJniIdsIndirectionOffset();
return spec;
}
const instrumentationOffsetParsers = {
ia32: parsex86InstrumentationOffset,
x64: parsex86InstrumentationOffset,
arm: parseArmInstrumentationOffset,
arm64: parseArm64InstrumentationOffset
};
function tryDetectInstrumentationOffset (api) {
const impl = api['art::Runtime::DeoptimizeBootImage'];
if (impl === undefined) {
return null;
}
return parseInstructionsAt(impl, instrumentationOffsetParsers[Process.arch], { limit: 30 });
}
function parsex86InstrumentationOffset (insn) {
if (insn.mnemonic !== 'lea') {
return null;
}
const offset = insn.operands[1].value.disp;
if (offset < 0x100 || offset > 0x400) {
return null;
}
return offset;
}
function parseArmInstrumentationOffset (insn) {
if (insn.mnemonic !== 'add.w') {
return null;
}
const ops = insn.operands;
if (ops.length !== 3) {
return null;
}
const op2 = ops[2];
if (op2.type !== 'imm') {
return null;
}
return op2.value;
}
function parseArm64InstrumentationOffset (insn) {
if (insn.mnemonic !== 'add') {
return null;
}
const ops = insn.operands;
if (ops.length !== 3) {
return null;
}
if (ops[0].value === 'sp' || ops[1].value === 'sp') {
return null;
}
const op2 = ops[2];
if (op2.type !== 'imm') {
return null;
}
const offset = op2.value.valueOf();
if (offset < 0x100 || offset > 0x400) {
return null;
}
return offset;
}
const jniIdsIndirectionOffsetParsers = {
ia32: parsex86JniIdsIndirectionOffset,
x64: parsex86JniIdsIndirectionOffset,
arm: parseArmJniIdsIndirectionOffset,
arm64: parseArm64JniIdsIndirectionOffset
};
function tryDetectJniIdsIndirectionOffset () {
const impl = Module.findExportByName('libart.so', '_ZN3art7Runtime12SetJniIdTypeENS_9JniIdTypeE');
if (impl === null) {
return null;
}
const offset = parseInstructionsAt(impl, jniIdsIndirectionOffsetParsers[Process.arch], { limit: 20 });
if (offset === null) {
throw new Error('Unable to determine Runtime.jni_ids_indirection_ offset');
}
return offset;
}
function parsex86JniIdsIndirectionOffset (insn) {
if (insn.mnemonic === 'cmp') {
return insn.operands[0].value.disp;
}
return null;
}
function parseArmJniIdsIndirectionOffset (insn) {
if (insn.mnemonic === 'ldr.w') {
return insn.operands[1].value.disp;
}
return null;
}
function parseArm64JniIdsIndirectionOffset (insn, prevInsn) {
if (prevInsn === null) {
return null;
}
const { mnemonic } = insn;
const { mnemonic: prevMnemonic } = prevInsn;
if ((mnemonic === 'cmp' && prevMnemonic === 'ldr') || (mnemonic === 'bl' && prevMnemonic === 'str')) {
return prevInsn.operands[1].value.disp;
}
return null;
}
function _getArtInstrumentationSpec () {
const deoptimizationEnabledOffsets = {
'4-21': 136,
'4-22': 136,
'4-23': 172,
'4-24': 196,
'4-25': 196,
'4-26': 196,
'4-27': 196,
'4-28': 212,
'4-29': 172,
'4-30': 180,
'8-21': 224,
'8-22': 224,
'8-23': 296,
'8-24': 344,
'8-25': 344,
'8-26': 352,
'8-27': 352,
'8-28': 392,
'8-29': 328,
'8-30': 336
};
const deoptEnabledOffset = deoptimizationEnabledOffsets[`${pointerSize}-${getAndroidApiLevel()}`];
if (deoptEnabledOffset === undefined) {
throw new Error('Unable to determine Instrumentation field offsets');
}
return {
offset: {
forcedInterpretOnly: 4,
deoptimizationEnabled: deoptEnabledOffset
}
};
}
function getArtClassLinkerSpec (runtime, runtimeSpec) {
const spec = tryGetArtClassLinkerSpec(runtime, runtimeSpec);
if (spec === null) {
throw new Error('Unable to determine ClassLinker field offsets');
}
return spec;
}
function tryGetArtClassLinkerSpec (runtime, runtimeSpec) {
if (cachedArtClassLinkerSpec !== null) {
return cachedArtClassLinkerSpec;
}
/*
* On Android 5.x:
*
* class ClassLinker {
* ...
* InternTable* intern_table_; <-- We find this then calculate our way forwards
* const void* portable_resolution_trampoline_;
* const void* quick_resolution_trampoline_;
* const void* portable_imt_conflict_trampoline_;
* const void* quick_imt_conflict_trampoline_;
* const void* quick_generic_jni_trampoline_; <-- ...to this
* const void* quick_to_interpreter_bridge_trampoline_;
* ...
* }
*
* On Android 6.x and above:
*
* class ClassLinker {
* ...
* InternTable* intern_table_; <-- We find this then calculate our way forwards
* const void* quick_resolution_trampoline_;
* const void* quick_imt_conflict_trampoline_;
* const void* quick_generic_jni_trampoline_; <-- ...to this
* const void* quick_to_interpreter_bridge_trampoline_;
* ...
* }
*/
const { classLinker: classLinkerOffset, internTable: internTableOffset } = runtimeSpec.offset;
const classLinker = runtime.add(classLinkerOffset).readPointer();
const internTable = runtime.add(internTableOffset).readPointer();
const startOffset = (pointerSize === 4) ? 100 : 200;
const endOffset = startOffset + (100 * pointerSize);
const apiLevel = getAndroidApiLevel();
let spec = null;
for (let offset = startOffset; offset !== endOffset; offset += pointerSize) {
const value = classLinker.add(offset).readPointer();
if (value.equals(internTable)) {
let delta;
if (apiLevel >= 30 || getAndroidCodename() === 'R') {
delta = 6;
} else if (apiLevel >= 29) {
delta = 4;
} else if (apiLevel >= 23) {
delta = 3;
} else {
delta = 5;
}
const quickGenericJniTrampolineOffset = offset + (delta * pointerSize);
let quickResolutionTrampolineOffset;
if (apiLevel >= 23) {
quickResolutionTrampolineOffset = quickGenericJniTrampolineOffset - (2 * pointerSize);
} else {
quickResolutionTrampolineOffset = quickGenericJniTrampolineOffset - (3 * pointerSize);
}
spec = {
offset: {
quickResolutionTrampoline: quickResolutionTrampolineOffset,
quickImtConflictTrampoline: quickGenericJniTrampolineOffset - pointerSize,
quickGenericJniTrampoline: quickGenericJniTrampolineOffset,
quickToInterpreterBridgeTrampoline: quickGenericJniTrampolineOffset + pointerSize
}
};
break;
}
}
if (spec !== null) {
cachedArtClassLinkerSpec = spec;
}
return spec;
}
function getArtClassSpec (vm) {
let apiLevel;
try {
apiLevel = getAndroidApiLevel();
} catch (e) {
return null;
}
if (apiLevel < 24) {
return null;
}
let base, cmo;
if (apiLevel >= 26) {
base = 40;
cmo = 116;
} else {
base = 56;
cmo = 124;
}
return {
offset: {
ifields: base,
methods: base + 8,
sfields: base + 16,
copiedMethodsOffset: cmo
}
};
}
function _getArtMethodSpec (vm) {
const api = getApi();
let spec;
vm.perform(env => {
const process = env.findClass('android/os/Process');
const getElapsedCpuTime = unwrapMethodId(env.getStaticMethodId(process, 'getElapsedCpuTime', '()J'));
env.deleteLocalRef(process);
const runtimeModule = Process.getModuleByName('libandroid_runtime.so');
const runtimeStart = runtimeModule.base;
const runtimeEnd = runtimeStart.add(runtimeModule.size);
const apiLevel = getAndroidApiLevel();
const entrypointFieldSize = (apiLevel <= 21) ? 8 : pointerSize;
const expectedAccessFlags = kAccPublic | kAccStatic | kAccFinal | kAccNative;
const relevantAccessFlagsMask = ~(kAccFastInterpreterToInterpreterInvoke | kAccPublicApi | kAccNterpInvokeFastPathFlag) >>> 0;
let jniCodeOffset = null;
let accessFlagsOffset = null;
let remaining = 2;
for (let offset = 0; offset !== 64 && remaining !== 0; offset += 4) {
const field = getElapsedCpuTime.add(offset);
if (jniCodeOffset === null) {
const address = field.readPointer();
if (address.compare(runtimeStart) >= 0 && address.compare(runtimeEnd) < 0) {