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9583e3657e
Co-authored-by: Ron Pressler <rpressler@openjdk.org> Co-authored-by: Alan Bateman <alanb@openjdk.org> Co-authored-by: Erik Österlund <eosterlund@openjdk.org> Co-authored-by: Andrew Haley <aph@openjdk.org> Co-authored-by: Rickard Bäckman <rbackman@openjdk.org> Co-authored-by: Markus Grönlund <mgronlun@openjdk.org> Co-authored-by: Leonid Mesnik <lmesnik@openjdk.org> Co-authored-by: Serguei Spitsyn <sspitsyn@openjdk.org> Co-authored-by: Chris Plummer <cjplummer@openjdk.org> Co-authored-by: Coleen Phillimore <coleenp@openjdk.org> Co-authored-by: Robbin Ehn <rehn@openjdk.org> Co-authored-by: Stefan Karlsson <stefank@openjdk.org> Co-authored-by: Thomas Schatzl <tschatzl@openjdk.org> Co-authored-by: Sergey Kuksenko <skuksenko@openjdk.org> Reviewed-by: lancea, eosterlund, rehn, sspitsyn, stefank, tschatzl, dfuchs, lmesnik, dcubed, kevinw, amenkov, dlong, mchung, psandoz, bpb, coleenp, smarks, egahlin, mseledtsov, coffeys, darcy
73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
/*
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* Copyright (c) 2021, 2022, 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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#ifndef SHARE_RUNTIME_STACKFRAMESTREAM_HPP
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#define SHARE_RUNTIME_STACKFRAMESTREAM_HPP
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#include "memory/allocation.hpp"
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#include "runtime/frame.hpp"
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#include "runtime/registerMap.hpp"
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class JavaThread;
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//
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// StackFrameStream iterates through the frames of a thread starting from
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// top most frame. It automatically takes care of updating the location of
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// all (callee-saved) registers iff the update flag is set. It also
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// automatically takes care of lazily applying deferred GC processing
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// onto exposed frames, such that all oops are valid iff the process_frames
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// flag is set.
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//
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// Notice: If a thread is stopped at a safepoint, all registers are saved,
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// not only the callee-saved ones.
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//
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// Use:
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//
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// for(StackFrameStream fst(thread, true /* update */, true /* process_frames */);
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// !fst.is_done();
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// fst.next()) {
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// ...
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// }
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//
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class StackFrameStream : public StackObj {
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private:
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frame _fr;
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RegisterMap _reg_map;
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bool _is_done;
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public:
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StackFrameStream(JavaThread *thread, bool update, bool process_frames, bool allow_missing_reg = false);
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// Iteration
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inline bool is_done();
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void next() { if (!_is_done) _fr = _fr.sender(&_reg_map); }
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// Query
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frame *current() { return &_fr; }
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RegisterMap* register_map() { return &_reg_map; }
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};
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#endif // SHARE_RUNTIME_STACKFRAMESTREAM_HPP
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