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94 lines
3.2 KiB
C++
94 lines
3.2 KiB
C++
/*
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* Copyright (c) 2018, 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "classfile/javaClasses.inline.hpp"
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#include "jfr/jfrEvents.hpp"
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#include "jfr/support/jfrThreadId.hpp"
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#include "logging/log.hpp"
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#include "logging/logStream.hpp"
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#include "oops/oopsHierarchy.hpp"
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#include "oops/stackChunkOop.inline.hpp"
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#include "runtime/continuation.hpp"
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#include "runtime/continuationEntry.inline.hpp"
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#include "runtime/continuationHelper.inline.hpp"
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#include "runtime/continuationWrapper.inline.hpp"
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#include "runtime/javaThread.hpp"
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#include "runtime/stackChunkFrameStream.inline.hpp"
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ContinuationWrapper::ContinuationWrapper(const RegisterMap* map)
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: ContinuationWrapper(map->thread(),
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Continuation::get_continuation_entry_for_continuation(map->thread(), map->stack_chunk()->cont()),
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map->stack_chunk()->cont()) {
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assert(_entry == nullptr || _continuation == _entry->cont_oop(map->thread()),
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"cont: " INTPTR_FORMAT " entry: " INTPTR_FORMAT " entry_sp: " INTPTR_FORMAT,
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p2i( (oopDesc*)_continuation), p2i((oopDesc*)_entry->cont_oop(map->thread())), p2i(entrySP()));
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}
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const frame ContinuationWrapper::last_frame() {
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stackChunkOop chunk = last_nonempty_chunk();
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if (chunk == nullptr) {
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return frame();
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}
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return StackChunkFrameStream<ChunkFrames::Mixed>(chunk).to_frame();
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}
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stackChunkOop ContinuationWrapper::find_chunk_by_address(void* p) const {
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for (stackChunkOop chunk = tail(); chunk != nullptr; chunk = chunk->parent()) {
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if (chunk->is_in_chunk(p)) {
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assert(chunk->is_usable_in_chunk(p), "");
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return chunk;
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}
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}
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return nullptr;
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}
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#ifndef PRODUCT
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intptr_t ContinuationWrapper::hash() {
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return Thread::current()->is_Java_thread() ? _continuation->identity_hash() : -1;
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}
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#endif
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#ifdef ASSERT
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bool ContinuationWrapper::is_entry_frame(const frame& f) {
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return f.sp() == entrySP();
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}
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bool ContinuationWrapper::chunk_invariant() const {
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// only the topmost chunk can be empty
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if (_tail == nullptr) {
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return true;
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}
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int i = 1;
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for (stackChunkOop chunk = _tail->parent(); chunk != nullptr; chunk = chunk->parent()) {
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if (chunk->is_empty()) {
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assert(chunk != _tail, "");
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return false;
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}
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i++;
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}
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return true;
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}
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#endif // ASSERT
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