409 lines
16 KiB
C++
409 lines
16 KiB
C++
/*
|
|
* Copyright (C) 2016 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.
|
|
*/
|
|
|
|
#include "java_lang_reflect_Executable.h"
|
|
|
|
#include "android-base/stringprintf.h"
|
|
#include "nativehelper/jni_macros.h"
|
|
|
|
#include "art_method-inl.h"
|
|
#include "class_root-inl.h"
|
|
#include "dex/dex_file_annotations.h"
|
|
#include "handle.h"
|
|
#include "jni/jni_internal.h"
|
|
#include "mirror/class-alloc-inl.h"
|
|
#include "mirror/class-inl.h"
|
|
#include "mirror/method.h"
|
|
#include "mirror/object-inl.h"
|
|
#include "mirror/object_array-alloc-inl.h"
|
|
#include "mirror/object_array-inl.h"
|
|
#include "native_util.h"
|
|
#include "reflection.h"
|
|
#include "scoped_fast_native_object_access-inl.h"
|
|
#include "well_known_classes.h"
|
|
|
|
namespace art {
|
|
|
|
using android::base::StringPrintf;
|
|
|
|
static jobjectArray Executable_getDeclaredAnnotationsNative(JNIEnv* env, jobject javaMethod) {
|
|
ScopedFastNativeObjectAccess soa(env);
|
|
ArtMethod* method = ArtMethod::FromReflectedMethod(soa, javaMethod);
|
|
if (method->GetDeclaringClass()->IsProxyClass()) {
|
|
// Return an empty array instead of a null pointer.
|
|
ObjPtr<mirror::Class> annotation_array_class =
|
|
soa.Decode<mirror::Class>(WellKnownClasses::java_lang_annotation_Annotation__array);
|
|
ObjPtr<mirror::ObjectArray<mirror::Object>> empty_array =
|
|
mirror::ObjectArray<mirror::Object>::Alloc(soa.Self(), annotation_array_class, 0);
|
|
return soa.AddLocalReference<jobjectArray>(empty_array);
|
|
}
|
|
return soa.AddLocalReference<jobjectArray>(annotations::GetAnnotationsForMethod(method));
|
|
}
|
|
|
|
static jobject Executable_getAnnotationNative(JNIEnv* env,
|
|
jobject javaMethod,
|
|
jclass annotationType) {
|
|
ScopedFastNativeObjectAccess soa(env);
|
|
StackHandleScope<1> hs(soa.Self());
|
|
ArtMethod* method = ArtMethod::FromReflectedMethod(soa, javaMethod);
|
|
if (method->IsProxyMethod()) {
|
|
return nullptr;
|
|
} else {
|
|
Handle<mirror::Class> klass(hs.NewHandle(soa.Decode<mirror::Class>(annotationType)));
|
|
return soa.AddLocalReference<jobject>(annotations::GetAnnotationForMethod(method, klass));
|
|
}
|
|
}
|
|
|
|
static jobjectArray Executable_getSignatureAnnotation(JNIEnv* env, jobject javaMethod) {
|
|
ScopedFastNativeObjectAccess soa(env);
|
|
ArtMethod* method = ArtMethod::FromReflectedMethod(soa, javaMethod);
|
|
if (method->GetDeclaringClass()->IsProxyClass()) {
|
|
return nullptr;
|
|
}
|
|
return soa.AddLocalReference<jobjectArray>(annotations::GetSignatureAnnotationForMethod(method));
|
|
}
|
|
|
|
|
|
static jobjectArray Executable_getParameterAnnotationsNative(JNIEnv* env, jobject javaMethod) {
|
|
ScopedFastNativeObjectAccess soa(env);
|
|
ArtMethod* method = ArtMethod::FromReflectedMethod(soa, javaMethod);
|
|
if (method->IsProxyMethod()) {
|
|
return nullptr;
|
|
}
|
|
|
|
StackHandleScope<4> hs(soa.Self());
|
|
Handle<mirror::ObjectArray<mirror::Object>> annotations =
|
|
hs.NewHandle(annotations::GetParameterAnnotations(method));
|
|
if (annotations.IsNull()) {
|
|
return nullptr;
|
|
}
|
|
|
|
// If the method is not a constructor, or has parameter annotations
|
|
// for each parameter, then we can return those annotations
|
|
// unmodified. Otherwise, we need to look at whether the
|
|
// constructor has implicit parameters as these may need padding
|
|
// with empty parameter annotations.
|
|
if (!method->IsConstructor() ||
|
|
annotations->GetLength() == static_cast<int>(method->GetNumberOfParameters())) {
|
|
return soa.AddLocalReference<jobjectArray>(annotations.Get());
|
|
}
|
|
|
|
// If declaring class is a local or an enum, do not pad parameter
|
|
// annotations, as the implicit constructor parameters are an implementation
|
|
// detail rather than required by JLS.
|
|
Handle<mirror::Class> declaring_class = hs.NewHandle(method->GetDeclaringClass());
|
|
if (annotations::GetEnclosingMethod(declaring_class) != nullptr ||
|
|
declaring_class->IsEnum()) {
|
|
return soa.AddLocalReference<jobjectArray>(annotations.Get());
|
|
}
|
|
|
|
// Prepare to resize the annotations so there is 1:1 correspondence
|
|
// with the constructor parameters.
|
|
Handle<mirror::ObjectArray<mirror::Object>> resized_annotations = hs.NewHandle(
|
|
mirror::ObjectArray<mirror::Object>::Alloc(
|
|
soa.Self(),
|
|
annotations->GetClass(),
|
|
static_cast<int>(method->GetNumberOfParameters())));
|
|
if (resized_annotations.IsNull()) {
|
|
DCHECK(soa.Self()->IsExceptionPending());
|
|
return nullptr;
|
|
}
|
|
|
|
static constexpr bool kTransactionActive = false;
|
|
const int32_t offset = resized_annotations->GetLength() - annotations->GetLength();
|
|
if (offset > 0) {
|
|
// Workaround for dexers (d8/dx) that do not insert annotations
|
|
// for implicit parameters (b/68033708).
|
|
ObjPtr<mirror::Class> annotation_array_class =
|
|
soa.Decode<mirror::Class>(WellKnownClasses::java_lang_annotation_Annotation__array);
|
|
Handle<mirror::ObjectArray<mirror::Object>> empty_annotations = hs.NewHandle(
|
|
mirror::ObjectArray<mirror::Object>::Alloc(soa.Self(), annotation_array_class, 0));
|
|
if (empty_annotations.IsNull()) {
|
|
DCHECK(soa.Self()->IsExceptionPending());
|
|
return nullptr;
|
|
}
|
|
for (int i = 0; i < offset; ++i) {
|
|
resized_annotations->SetWithoutChecks<kTransactionActive>(i, empty_annotations.Get());
|
|
}
|
|
for (int i = 0; i < annotations->GetLength(); ++i) {
|
|
ObjPtr<mirror::Object> annotation = annotations->GetWithoutChecks(i);
|
|
resized_annotations->SetWithoutChecks<kTransactionActive>(i + offset, annotation);
|
|
}
|
|
} else {
|
|
// Workaround for Jack (defunct) erroneously inserting annotations
|
|
// for local classes (b/68033708).
|
|
DCHECK_LT(offset, 0);
|
|
for (int i = 0; i < resized_annotations->GetLength(); ++i) {
|
|
ObjPtr<mirror::Object> annotation = annotations->GetWithoutChecks(i - offset);
|
|
resized_annotations->SetWithoutChecks<kTransactionActive>(i, annotation);
|
|
}
|
|
}
|
|
return soa.AddLocalReference<jobjectArray>(resized_annotations.Get());
|
|
}
|
|
|
|
static jobjectArray Executable_getParameters0(JNIEnv* env, jobject javaMethod) {
|
|
ScopedFastNativeObjectAccess soa(env);
|
|
Thread* self = soa.Self();
|
|
StackHandleScope<8> hs(self);
|
|
|
|
Handle<mirror::Method> executable = hs.NewHandle(soa.Decode<mirror::Method>(javaMethod));
|
|
ArtMethod* art_method = executable.Get()->GetArtMethod();
|
|
if (art_method->GetDeclaringClass()->IsProxyClass()) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Find the MethodParameters system annotation.
|
|
MutableHandle<mirror::ObjectArray<mirror::String>> names =
|
|
hs.NewHandle<mirror::ObjectArray<mirror::String>>(nullptr);
|
|
MutableHandle<mirror::IntArray> access_flags = hs.NewHandle<mirror::IntArray>(nullptr);
|
|
if (!annotations::GetParametersMetadataForMethod(art_method, &names, &access_flags)) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Validate the MethodParameters system annotation data.
|
|
if (UNLIKELY(names == nullptr || access_flags == nullptr)) {
|
|
ThrowIllegalArgumentException(
|
|
StringPrintf("Missing parameter metadata for names or access flags for %s",
|
|
art_method->PrettyMethod().c_str()).c_str());
|
|
return nullptr;
|
|
}
|
|
|
|
// Check array sizes match each other
|
|
int32_t names_count = names.Get()->GetLength();
|
|
int32_t access_flags_count = access_flags.Get()->GetLength();
|
|
if (names_count != access_flags_count) {
|
|
ThrowIllegalArgumentException(
|
|
StringPrintf(
|
|
"Inconsistent parameter metadata for %s. names length: %d, access flags length: %d",
|
|
art_method->PrettyMethod().c_str(),
|
|
names_count,
|
|
access_flags_count).c_str());
|
|
return nullptr;
|
|
}
|
|
|
|
// Instantiate a Parameter[] to hold the result.
|
|
Handle<mirror::Class> parameter_array_class =
|
|
hs.NewHandle(
|
|
soa.Decode<mirror::Class>(WellKnownClasses::java_lang_reflect_Parameter__array));
|
|
Handle<mirror::ObjectArray<mirror::Object>> parameter_array =
|
|
hs.NewHandle(
|
|
mirror::ObjectArray<mirror::Object>::Alloc(self,
|
|
parameter_array_class.Get(),
|
|
names_count));
|
|
if (UNLIKELY(parameter_array == nullptr)) {
|
|
self->AssertPendingException();
|
|
return nullptr;
|
|
}
|
|
|
|
Handle<mirror::Class> parameter_class =
|
|
hs.NewHandle(soa.Decode<mirror::Class>(WellKnownClasses::java_lang_reflect_Parameter));
|
|
ArtMethod* parameter_init =
|
|
jni::DecodeArtMethod(WellKnownClasses::java_lang_reflect_Parameter_init);
|
|
|
|
// Mutable handles used in the loop below to ensure cleanup without scaling the number of
|
|
// handles by the number of parameters.
|
|
MutableHandle<mirror::String> name = hs.NewHandle<mirror::String>(nullptr);
|
|
MutableHandle<mirror::Object> parameter = hs.NewHandle<mirror::Object>(nullptr);
|
|
|
|
// Populate the Parameter[] to return.
|
|
for (int32_t parameter_index = 0; parameter_index < names_count; parameter_index++) {
|
|
name.Assign(names.Get()->Get(parameter_index));
|
|
int32_t modifiers = access_flags.Get()->Get(parameter_index);
|
|
|
|
// Allocate / initialize the Parameter to add to parameter_array.
|
|
parameter.Assign(parameter_class->AllocObject(self));
|
|
if (UNLIKELY(parameter == nullptr)) {
|
|
self->AssertPendingOOMException();
|
|
return nullptr;
|
|
}
|
|
|
|
uint32_t args[5] = { PointerToLowMemUInt32(parameter.Get()),
|
|
PointerToLowMemUInt32(name.Get()),
|
|
static_cast<uint32_t>(modifiers),
|
|
PointerToLowMemUInt32(executable.Get()),
|
|
static_cast<uint32_t>(parameter_index)
|
|
};
|
|
JValue result;
|
|
static const char* method_signature = "VLILI"; // return + parameter types
|
|
parameter_init->Invoke(self, args, sizeof(args), &result, method_signature);
|
|
if (UNLIKELY(self->IsExceptionPending())) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Store the Parameter in the Parameter[].
|
|
parameter_array.Get()->Set(parameter_index, parameter.Get());
|
|
if (UNLIKELY(self->IsExceptionPending())) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
return soa.AddLocalReference<jobjectArray>(parameter_array.Get());
|
|
}
|
|
|
|
static jboolean Executable_isAnnotationPresentNative(JNIEnv* env,
|
|
jobject javaMethod,
|
|
jclass annotationType) {
|
|
ScopedFastNativeObjectAccess soa(env);
|
|
ArtMethod* method = ArtMethod::FromReflectedMethod(soa, javaMethod);
|
|
if (method->GetDeclaringClass()->IsProxyClass()) {
|
|
return false;
|
|
}
|
|
StackHandleScope<1> hs(soa.Self());
|
|
Handle<mirror::Class> klass(hs.NewHandle(soa.Decode<mirror::Class>(annotationType)));
|
|
return annotations::IsMethodAnnotationPresent(method, klass);
|
|
}
|
|
|
|
static jint Executable_compareMethodParametersInternal(JNIEnv* env,
|
|
jobject thisMethod,
|
|
jobject otherMethod) {
|
|
ScopedFastNativeObjectAccess soa(env);
|
|
ArtMethod* this_method = ArtMethod::FromReflectedMethod(soa, thisMethod);
|
|
ArtMethod* other_method = ArtMethod::FromReflectedMethod(soa, otherMethod);
|
|
|
|
this_method = this_method->GetInterfaceMethodIfProxy(kRuntimePointerSize);
|
|
other_method = other_method->GetInterfaceMethodIfProxy(kRuntimePointerSize);
|
|
|
|
const dex::TypeList* this_list = this_method->GetParameterTypeList();
|
|
const dex::TypeList* other_list = other_method->GetParameterTypeList();
|
|
|
|
if (this_list == other_list) {
|
|
return 0;
|
|
}
|
|
|
|
if (this_list == nullptr && other_list != nullptr) {
|
|
return -1;
|
|
}
|
|
|
|
if (other_list == nullptr && this_list != nullptr) {
|
|
return 1;
|
|
}
|
|
|
|
const int32_t this_size = this_list->Size();
|
|
const int32_t other_size = other_list->Size();
|
|
|
|
if (this_size != other_size) {
|
|
return (this_size - other_size);
|
|
}
|
|
|
|
for (int32_t i = 0; i < this_size; ++i) {
|
|
const dex::TypeId& lhs = this_method->GetDexFile()->GetTypeId(
|
|
this_list->GetTypeItem(i).type_idx_);
|
|
const dex::TypeId& rhs = other_method->GetDexFile()->GetTypeId(
|
|
other_list->GetTypeItem(i).type_idx_);
|
|
|
|
uint32_t lhs_len, rhs_len;
|
|
const char* lhs_data = this_method->GetDexFile()->StringDataAndUtf16LengthByIdx(
|
|
lhs.descriptor_idx_, &lhs_len);
|
|
const char* rhs_data = other_method->GetDexFile()->StringDataAndUtf16LengthByIdx(
|
|
rhs.descriptor_idx_, &rhs_len);
|
|
|
|
int cmp = strcmp(lhs_data, rhs_data);
|
|
if (cmp != 0) {
|
|
return (cmp < 0) ? -1 : 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static jstring Executable_getMethodNameInternal(JNIEnv* env, jobject javaMethod) {
|
|
ScopedFastNativeObjectAccess soa(env);
|
|
ArtMethod* method = ArtMethod::FromReflectedMethod(soa, javaMethod);
|
|
method = method->GetInterfaceMethodIfProxy(kRuntimePointerSize);
|
|
return soa.AddLocalReference<jstring>(method->ResolveNameString());
|
|
}
|
|
|
|
static jclass Executable_getMethodReturnTypeInternal(JNIEnv* env, jobject javaMethod) {
|
|
ScopedFastNativeObjectAccess soa(env);
|
|
ArtMethod* method = ArtMethod::FromReflectedMethod(soa, javaMethod);
|
|
method = method->GetInterfaceMethodIfProxy(kRuntimePointerSize);
|
|
ObjPtr<mirror::Class> return_type(method->ResolveReturnType());
|
|
if (return_type.IsNull()) {
|
|
CHECK(soa.Self()->IsExceptionPending());
|
|
return nullptr;
|
|
}
|
|
|
|
return soa.AddLocalReference<jclass>(return_type);
|
|
}
|
|
|
|
static jobjectArray Executable_getParameterTypesInternal(JNIEnv* env, jobject javaMethod) {
|
|
ScopedFastNativeObjectAccess soa(env);
|
|
ArtMethod* method = ArtMethod::FromReflectedMethod(soa, javaMethod);
|
|
method = method->GetInterfaceMethodIfProxy(kRuntimePointerSize);
|
|
|
|
const dex::TypeList* params = method->GetParameterTypeList();
|
|
if (params == nullptr) {
|
|
return nullptr;
|
|
}
|
|
|
|
const uint32_t num_params = params->Size();
|
|
|
|
StackHandleScope<2> hs(soa.Self());
|
|
ObjPtr<mirror::Class> class_array_class = GetClassRoot<mirror::ObjectArray<mirror::Class>>();
|
|
Handle<mirror::ObjectArray<mirror::Class>> ptypes = hs.NewHandle(
|
|
mirror::ObjectArray<mirror::Class>::Alloc(soa.Self(), class_array_class, num_params));
|
|
if (ptypes.IsNull()) {
|
|
DCHECK(soa.Self()->IsExceptionPending());
|
|
return nullptr;
|
|
}
|
|
|
|
MutableHandle<mirror::Class> param(hs.NewHandle<mirror::Class>(nullptr));
|
|
for (uint32_t i = 0; i < num_params; ++i) {
|
|
const dex::TypeIndex type_idx = params->GetTypeItem(i).type_idx_;
|
|
param.Assign(Runtime::Current()->GetClassLinker()->ResolveType(type_idx, method));
|
|
if (param.Get() == nullptr) {
|
|
DCHECK(soa.Self()->IsExceptionPending());
|
|
return nullptr;
|
|
}
|
|
ptypes->SetWithoutChecks<false>(i, param.Get());
|
|
}
|
|
|
|
return soa.AddLocalReference<jobjectArray>(ptypes.Get());
|
|
}
|
|
|
|
static jint Executable_getParameterCountInternal(JNIEnv* env, jobject javaMethod) {
|
|
ScopedFastNativeObjectAccess soa(env);
|
|
ArtMethod* method = ArtMethod::FromReflectedMethod(soa, javaMethod);
|
|
method = method->GetInterfaceMethodIfProxy(kRuntimePointerSize);
|
|
|
|
const dex::TypeList* params = method->GetParameterTypeList();
|
|
return (params == nullptr) ? 0 : params->Size();
|
|
}
|
|
|
|
|
|
static JNINativeMethod gMethods[] = {
|
|
FAST_NATIVE_METHOD(Executable, compareMethodParametersInternal,
|
|
"(Ljava/lang/reflect/Method;)I"),
|
|
FAST_NATIVE_METHOD(Executable, getAnnotationNative,
|
|
"(Ljava/lang/Class;)Ljava/lang/annotation/Annotation;"),
|
|
FAST_NATIVE_METHOD(Executable, getDeclaredAnnotationsNative,
|
|
"()[Ljava/lang/annotation/Annotation;"),
|
|
FAST_NATIVE_METHOD(Executable, getParameterAnnotationsNative,
|
|
"()[[Ljava/lang/annotation/Annotation;"),
|
|
FAST_NATIVE_METHOD(Executable, getMethodNameInternal, "()Ljava/lang/String;"),
|
|
FAST_NATIVE_METHOD(Executable, getMethodReturnTypeInternal, "()Ljava/lang/Class;"),
|
|
FAST_NATIVE_METHOD(Executable, getParameterTypesInternal, "()[Ljava/lang/Class;"),
|
|
FAST_NATIVE_METHOD(Executable, getParameterCountInternal, "()I"),
|
|
FAST_NATIVE_METHOD(Executable, getParameters0, "()[Ljava/lang/reflect/Parameter;"),
|
|
FAST_NATIVE_METHOD(Executable, getSignatureAnnotation, "()[Ljava/lang/String;"),
|
|
FAST_NATIVE_METHOD(Executable, isAnnotationPresentNative, "(Ljava/lang/Class;)Z"),
|
|
};
|
|
|
|
void register_java_lang_reflect_Executable(JNIEnv* env) {
|
|
REGISTER_NATIVE_METHODS("java/lang/reflect/Executable");
|
|
}
|
|
|
|
} // namespace art
|