blob: 211ae10ab0ae83b35e26bbee942696e3f9002870 [file] [log] [blame]
/*
* Copyright (C) 2018 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 "arch/context.h"
#include "art_method-inl.h"
#include "jni.h"
#include "oat_quick_method_header.h"
#include "scoped_thread_state_change-inl.h"
#include "stack.h"
#include "thread.h"
namespace art {
namespace {
// Visit a proxy method Quick frame at a given depth.
class GetProxyQuickFrameVisitor FINAL : public StackVisitor {
public:
GetProxyQuickFrameVisitor(art::Thread* target, art::Context* ctx, size_t frame_depth)
REQUIRES_SHARED(art::Locks::mutator_lock_)
: art::StackVisitor(target, ctx, art::StackVisitor::StackWalkKind::kIncludeInlinedFrames),
cur_depth_(0u),
frame_depth_(frame_depth),
quick_frame_(nullptr) {}
bool VisitFrame() OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
if (GetMethod()->IsRuntimeMethod()) {
return true;
}
if (cur_depth_ == frame_depth_) {
// Found frame.
ShadowFrame* shadow_frame = GetCurrentShadowFrame();
if (shadow_frame != nullptr) {
// Nothing to do.
} else {
VisitQuickFrameAtSearchedDepth();
}
return false;
} else {
++cur_depth_;
return true;
}
}
void VisitQuickFrameAtSearchedDepth() REQUIRES_SHARED(Locks::mutator_lock_) {
quick_frame_ = GetCurrentQuickFrame();
CHECK(quick_frame_ != nullptr);
ArtMethod* method = *quick_frame_;
CHECK(method != nullptr);
CHECK(method->IsProxyMethod()) << method->PrettyMethod();
}
// Return the found Quick frame.
ArtMethod** GetQuickFrame() {
return quick_frame_;
}
private:
// The depth of the currently visited frame.
size_t cur_depth_;
// The depth of the currently searched frame.
size_t frame_depth_;
// The quick frame, if found.
ArtMethod** quick_frame_;
// Method name
DISALLOW_COPY_AND_ASSIGN(GetProxyQuickFrameVisitor);
};
extern "C" StackReference<mirror::Object>* artQuickGetProxyReferenceArgumentAt(size_t arg_pos,
ArtMethod** sp)
REQUIRES_SHARED(Locks::mutator_lock_);
jobject GetProxyReferenceArgument(size_t arg_pos, size_t proxy_method_frame_depth) {
Thread* self = Thread::Current();
ScopedObjectAccess soa(self);
std::unique_ptr<Context> context(Context::Create());
GetProxyQuickFrameVisitor visitor(self, context.get(), proxy_method_frame_depth);
visitor.WalkStack();
ArtMethod** quick_frame = visitor.GetQuickFrame();
CHECK(quick_frame != nullptr);
// Find reference argument in frame.
StackReference<mirror::Object>* ref_arg =
artQuickGetProxyReferenceArgumentAt(arg_pos, quick_frame);
CHECK(ref_arg != nullptr);
art::ObjPtr<mirror::Object> obj = ref_arg->AsMirrorPtr();
return obj.IsNull() ? nullptr : soa.AddLocalReference<jobject>(obj);
}
extern "C" JNIEXPORT jobject JNICALL Java_TestInvocationHandler_getArgument(
JNIEnv* env ATTRIBUTE_UNUSED, jobject thiz ATTRIBUTE_UNUSED, int arg_pos, int frame_depth) {
return GetProxyReferenceArgument(arg_pos, frame_depth);
}
} // namespace
} // namespace art