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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
*
* 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 "argument_visitor.h"
#include "dex_file-inl.h"
#include "mirror/abstract_method-inl.h"
#include "mirror/object_array-inl.h"
#include "mirror/object-inl.h"
#include "object_utils.h"
#include "reflection.h"
#include "runtime_support.h"
#include "scoped_thread_state_change.h"
#include "thread.h"
#include "well_known_classes.h"
#include "ScopedLocalRef.h"
namespace art {
// Visits arguments on the stack placing them into the args vector, Object* arguments are converted
// to jobjects.
class BuildPortableArgumentVisitor : public PortableArgumentVisitor {
public:
BuildPortableArgumentVisitor(MethodHelper& caller_mh, mirror::AbstractMethod** sp,
ScopedObjectAccessUnchecked& soa, std::vector<jvalue>& args) :
PortableArgumentVisitor(caller_mh, sp), soa_(soa), args_(args) {}
virtual void Visit() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
jvalue val;
Primitive::Type type = GetParamPrimitiveType();
switch (type) {
case Primitive::kPrimNot: {
mirror::Object* obj = *reinterpret_cast<mirror::Object**>(GetParamAddress());
val.l = soa_.AddLocalReference<jobject>(obj);
break;
}
case Primitive::kPrimLong: // Fall-through.
case Primitive::kPrimDouble:
val.j = *reinterpret_cast<jlong*>(GetParamAddress());
break;
case Primitive::kPrimBoolean: // Fall-through.
case Primitive::kPrimByte: // Fall-through.
case Primitive::kPrimChar: // Fall-through.
case Primitive::kPrimShort: // Fall-through.
case Primitive::kPrimInt: // Fall-through.
case Primitive::kPrimFloat:
val.i = *reinterpret_cast<jint*>(GetParamAddress());
break;
case Primitive::kPrimVoid:
LOG(FATAL) << "UNREACHABLE";
val.j = 0;
break;
}
args_.push_back(val);
}
private:
ScopedObjectAccessUnchecked& soa_;
std::vector<jvalue>& args_;
DISALLOW_COPY_AND_ASSIGN(BuildPortableArgumentVisitor);
};
// Visits arguments on the stack placing them into the args vector, Object* arguments are converted
// to jobjects.
class BuildQuickArgumentVisitor : public QuickArgumentVisitor {
public:
BuildQuickArgumentVisitor(MethodHelper& caller_mh, mirror::AbstractMethod** sp,
ScopedObjectAccessUnchecked& soa, std::vector<jvalue>& args) :
QuickArgumentVisitor(caller_mh, sp), soa_(soa), args_(args) {}
virtual void Visit() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
jvalue val;
Primitive::Type type = GetParamPrimitiveType();
switch (type) {
case Primitive::kPrimNot: {
mirror::Object* obj = *reinterpret_cast<mirror::Object**>(GetParamAddress());
val.l = soa_.AddLocalReference<jobject>(obj);
break;
}
case Primitive::kPrimLong: // Fall-through.
case Primitive::kPrimDouble:
if (IsSplitLongOrDouble()) {
val.j = ReadSplitLongParam();
} else {
val.j = *reinterpret_cast<jlong*>(GetParamAddress());
}
break;
case Primitive::kPrimBoolean: // Fall-through.
case Primitive::kPrimByte: // Fall-through.
case Primitive::kPrimChar: // Fall-through.
case Primitive::kPrimShort: // Fall-through.
case Primitive::kPrimInt: // Fall-through.
case Primitive::kPrimFloat:
val.i = *reinterpret_cast<jint*>(GetParamAddress());
break;
case Primitive::kPrimVoid:
LOG(FATAL) << "UNREACHABLE";
val.j = 0;
break;
}
args_.push_back(val);
}
private:
ScopedObjectAccessUnchecked& soa_;
std::vector<jvalue>& args_;
DISALLOW_COPY_AND_ASSIGN(BuildQuickArgumentVisitor);
};
// Handler for invocation on proxy methods. On entry a frame will exist for the proxy object method
// which is responsible for recording callee save registers. We explicitly place into jobjects the
// incoming reference arguments (so they survive GC). We invoke the invocation handler, which is a
// field within the proxy object, which will box the primitive arguments and deal with error cases.
extern "C" uint64_t artPortableProxyInvokeHandler(mirror::AbstractMethod* proxy_method,
mirror::Object* receiver,
Thread* self, mirror::AbstractMethod** sp)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
// Ensure we don't get thread suspension until the object arguments are safely in jobjects.
const char* old_cause =
self->StartAssertNoThreadSuspension("Adding to IRT proxy object arguments");
self->VerifyStack();
// Start new JNI local reference state.
JNIEnvExt* env = self->GetJniEnv();
ScopedObjectAccessUnchecked soa(env);
ScopedJniEnvLocalRefState env_state(env);
// Create local ref. copies of proxy method and the receiver.
jobject rcvr_jobj = soa.AddLocalReference<jobject>(receiver);
// Placing arguments into args vector and remove the receiver.
MethodHelper proxy_mh(proxy_method);
std::vector<jvalue> args;
BuildPortableArgumentVisitor local_ref_visitor(proxy_mh, sp, soa, args);
local_ref_visitor.VisitArguments();
args.erase(args.begin());
// Convert proxy method into expected interface method.
mirror::AbstractMethod* interface_method = proxy_method->FindOverriddenMethod();
DCHECK(interface_method != NULL);
DCHECK(!interface_method->IsProxyMethod()) << PrettyMethod(interface_method);
jobject interface_method_jobj = soa.AddLocalReference<jobject>(interface_method);
// All naked Object*s should now be in jobjects, so its safe to go into the main invoke code
// that performs allocations.
self->EndAssertNoThreadSuspension(old_cause);
JValue result = InvokeProxyInvocationHandler(soa, proxy_mh.GetShorty(),
rcvr_jobj, interface_method_jobj, args);
return result.GetJ();
}
// Handler for invocation on proxy methods. On entry a frame will exist for the proxy object method
// which is responsible for recording callee save registers. We explicitly place into jobjects the
// incoming reference arguments (so they survive GC). We invoke the invocation handler, which is a
// field within the proxy object, which will box the primitive arguments and deal with error cases.
extern "C" uint64_t artQuickProxyInvokeHandler(mirror::AbstractMethod* proxy_method,
mirror::Object* receiver,
Thread* self, mirror::AbstractMethod** sp)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
// Ensure we don't get thread suspension until the object arguments are safely in jobjects.
const char* old_cause =
self->StartAssertNoThreadSuspension("Adding to IRT proxy object arguments");
// Register the top of the managed stack, making stack crawlable.
DCHECK_EQ(*sp, proxy_method);
self->SetTopOfStack(sp, 0);
DCHECK_EQ(proxy_method->GetFrameSizeInBytes(),
Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsAndArgs)->GetFrameSizeInBytes());
self->VerifyStack();
// Start new JNI local reference state.
JNIEnvExt* env = self->GetJniEnv();
ScopedObjectAccessUnchecked soa(env);
ScopedJniEnvLocalRefState env_state(env);
// Create local ref. copies of proxy method and the receiver.
jobject rcvr_jobj = soa.AddLocalReference<jobject>(receiver);
// Placing arguments into args vector and remove the receiver.
MethodHelper proxy_mh(proxy_method);
std::vector<jvalue> args;
BuildQuickArgumentVisitor local_ref_visitor(proxy_mh, sp, soa, args);
local_ref_visitor.VisitArguments();
args.erase(args.begin());
// Convert proxy method into expected interface method.
mirror::AbstractMethod* interface_method = proxy_method->FindOverriddenMethod();
DCHECK(interface_method != NULL);
DCHECK(!interface_method->IsProxyMethod()) << PrettyMethod(interface_method);
jobject interface_method_jobj = soa.AddLocalReference<jobject>(interface_method);
// All naked Object*s should now be in jobjects, so its safe to go into the main invoke code
// that performs allocations.
self->EndAssertNoThreadSuspension(old_cause);
JValue result = InvokeProxyInvocationHandler(soa, proxy_mh.GetShorty(),
rcvr_jobj, interface_method_jobj, args);
return result.GetJ();
}
} // namespace art
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