118 lines
4.1 KiB
C++
118 lines
4.1 KiB
C++
/*
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* Copyright (C) 2014 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_INDIRECT_REFERENCE_TABLE_INL_H_
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#define ART_RUNTIME_INDIRECT_REFERENCE_TABLE_INL_H_
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#include "indirect_reference_table.h"
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#include "android-base/stringprintf.h"
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#include "base/dumpable.h"
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#include "gc_root-inl.h"
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#include "obj_ptr-inl.h"
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#include "verify_object.h"
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namespace art {
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namespace mirror {
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class Object;
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} // namespace mirror
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// Verifies that the indirect table lookup is valid.
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// Returns "false" if something looks bad.
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inline bool IndirectReferenceTable::IsValidReference(IndirectRef iref,
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/*out*/std::string* error_msg) const {
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DCHECK(iref != nullptr);
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DCHECK_EQ(GetIndirectRefKind(iref), kind_);
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const uint32_t top_index = segment_state_.top_index;
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uint32_t idx = ExtractIndex(iref);
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if (UNLIKELY(idx >= top_index)) {
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*error_msg = android::base::StringPrintf("deleted reference at index %u in a table of size %u",
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idx,
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top_index);
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return false;
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}
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if (UNLIKELY(table_[idx].GetReference()->IsNull())) {
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*error_msg = android::base::StringPrintf("deleted reference at index %u", idx);
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return false;
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}
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uint32_t iref_serial = DecodeSerial(reinterpret_cast<uintptr_t>(iref));
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uint32_t entry_serial = table_[idx].GetSerial();
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if (UNLIKELY(iref_serial != entry_serial)) {
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*error_msg = android::base::StringPrintf("stale reference with serial number %u v. current %u",
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iref_serial,
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entry_serial);
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return false;
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}
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return true;
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}
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// Make sure that the entry at "idx" is correctly paired with "iref".
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inline bool IndirectReferenceTable::CheckEntry(const char* what,
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IndirectRef iref,
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uint32_t idx) const {
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IndirectRef checkRef = ToIndirectRef(idx);
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if (UNLIKELY(checkRef != iref)) {
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std::string msg = android::base::StringPrintf(
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"JNI ERROR (app bug): attempt to %s stale %s %p (should be %p)",
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what,
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GetIndirectRefKindString(kind_),
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iref,
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checkRef);
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AbortIfNoCheckJNI(msg);
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return false;
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}
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return true;
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}
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template<ReadBarrierOption kReadBarrierOption>
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inline ObjPtr<mirror::Object> IndirectReferenceTable::Get(IndirectRef iref) const {
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DCHECK_EQ(GetIndirectRefKind(iref), kind_);
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uint32_t idx = ExtractIndex(iref);
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DCHECK_LT(idx, segment_state_.top_index);
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DCHECK_EQ(DecodeSerial(reinterpret_cast<uintptr_t>(iref)), table_[idx].GetSerial());
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DCHECK(!table_[idx].GetReference()->IsNull());
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ObjPtr<mirror::Object> obj = table_[idx].GetReference()->Read<kReadBarrierOption>();
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VerifyObject(obj);
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return obj;
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}
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inline void IndirectReferenceTable::Update(IndirectRef iref, ObjPtr<mirror::Object> obj) {
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DCHECK_EQ(GetIndirectRefKind(iref), kind_);
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uint32_t idx = ExtractIndex(iref);
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DCHECK_LT(idx, segment_state_.top_index);
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DCHECK_EQ(DecodeSerial(reinterpret_cast<uintptr_t>(iref)), table_[idx].GetSerial());
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DCHECK(!table_[idx].GetReference()->IsNull());
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table_[idx].SetReference(obj);
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}
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inline void IrtEntry::Add(ObjPtr<mirror::Object> obj) {
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++serial_;
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if (serial_ == kIRTPrevCount) {
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serial_ = 0;
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}
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references_[serial_] = GcRoot<mirror::Object>(obj);
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}
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inline void IrtEntry::SetReference(ObjPtr<mirror::Object> obj) {
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DCHECK_LT(serial_, kIRTPrevCount);
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references_[serial_] = GcRoot<mirror::Object>(obj);
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}
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} // namespace art
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#endif // ART_RUNTIME_INDIRECT_REFERENCE_TABLE_INL_H_
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