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70 lines
2.3 KiB
70 lines
2.3 KiB
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_RUNTIME_JAVA_FRAME_ROOT_INFO_H_
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#define ART_RUNTIME_JAVA_FRAME_ROOT_INFO_H_
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#include <iosfwd>
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#include <limits>
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#include "base/locks.h"
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#include "base/macros.h"
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#include "gc_root.h"
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namespace art {
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class StackVisitor;
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class JavaFrameRootInfo final : public RootInfo {
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public:
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static_assert(std::numeric_limits<size_t>::max() > std::numeric_limits<uint16_t>::max(),
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"No extra space in vreg to store meta-data");
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// Unable to determine what register number the root is from.
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static constexpr size_t kUnknownVreg = -1;
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// The register number for the root might be determinable but we did not attempt to find that
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// information.
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static constexpr size_t kImpreciseVreg = -2;
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// The root is from the declaring class of the current method.
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static constexpr size_t kMethodDeclaringClass = -3;
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// The root is from the argument to a Proxy invoke.
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static constexpr size_t kProxyReferenceArgument = -4;
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// The root is from the argument to a native invoke.
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static constexpr size_t kNativeReferenceArgument = -5;
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// The maximum precise vreg number
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static constexpr size_t kMaxVReg = std::numeric_limits<uint16_t>::max();
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JavaFrameRootInfo(uint32_t thread_id, const StackVisitor* stack_visitor, size_t vreg)
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: RootInfo(kRootJavaFrame, thread_id), stack_visitor_(stack_visitor), vreg_(vreg) {
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}
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void Describe(std::ostream& os) const override
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REQUIRES_SHARED(Locks::mutator_lock_);
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size_t GetVReg() const {
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return vreg_;
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}
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const StackVisitor* GetVisitor() const {
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return stack_visitor_;
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}
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private:
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const StackVisitor* const stack_visitor_;
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const size_t vreg_;
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};
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} // namespace art
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#endif // ART_RUNTIME_JAVA_FRAME_ROOT_INFO_H_
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