author | coleenp |
Thu, 25 Apr 2019 10:56:31 -0400 | |
changeset 54623 | 1126f0607c70 |
parent 54603 | cb8e16d6ff1e |
child 55571 | 49102ba8cf14 |
child 57360 | 5d043a159d5c |
child 58678 | 9cf78a70fa4f |
permissions | -rw-r--r-- |
50113 | 1 |
/* |
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* Copyright (c) 2011, 2019, 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 "precompiled.hpp" |
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#include "jfr/metadata/jfrSerializer.hpp" |
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#include "jfr/recorder/checkpoint/types/traceid/jfrTraceId.inline.hpp" |
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#include "jfr/recorder/repository/jfrChunkWriter.hpp" |
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#include "jfr/recorder/service/jfrOptionSet.hpp" |
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#include "jfr/recorder/stacktrace/jfrStackTraceRepository.hpp" |
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#include "jfr/utilities/jfrTypes.hpp" |
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#include "memory/allocation.inline.hpp" |
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#include "runtime/mutexLocker.hpp" |
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#include "runtime/os.inline.hpp" |
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#include "runtime/safepoint.hpp" |
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#include "runtime/task.hpp" |
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#include "runtime/vframe.inline.hpp" |
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class vframeStreamSamples : public vframeStreamCommon { |
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public: |
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// constructor that starts with sender of frame fr (top_frame) |
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vframeStreamSamples(JavaThread *jt, frame fr, bool stop_at_java_call_stub); |
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void samples_next(); |
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void stop() {} |
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}; |
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vframeStreamSamples::vframeStreamSamples(JavaThread *jt, frame fr, bool stop_at_java_call_stub) : vframeStreamCommon(jt) { |
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_stop_at_java_call_stub = stop_at_java_call_stub; |
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_frame = fr; |
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// We must always have a valid frame to start filling |
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bool filled_in = fill_from_frame(); |
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assert(filled_in, "invariant"); |
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} |
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// Solaris SPARC Compiler1 needs an additional check on the grandparent |
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// of the top_frame when the parent of the top_frame is interpreted and |
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// the grandparent is compiled. However, in this method we do not know |
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// the relationship of the current _frame relative to the top_frame so |
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// we implement a more broad sanity check. When the previous callee is |
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// interpreted and the current sender is compiled, we verify that the |
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// current sender is also walkable. If it is not walkable, then we mark |
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// the current vframeStream as at the end. |
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void vframeStreamSamples::samples_next() { |
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// handle frames with inlining |
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if (_mode == compiled_mode && |
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vframeStreamCommon::fill_in_compiled_inlined_sender()) { |
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return; |
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} |
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// handle general case |
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u4 loop_count = 0; |
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u4 loop_max = MAX_STACK_DEPTH * 2; |
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do { |
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loop_count++; |
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// By the time we get here we should never see unsafe but better safe then segv'd |
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if (loop_count > loop_max || !_frame.safe_for_sender(_thread)) { |
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_mode = at_end_mode; |
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return; |
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} |
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_frame = _frame.sender(&_reg_map); |
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} while (!fill_from_frame()); |
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} |
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static JfrStackTraceRepository* _instance = NULL; |
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JfrStackTraceRepository& JfrStackTraceRepository::instance() { |
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return *_instance; |
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} |
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JfrStackTraceRepository* JfrStackTraceRepository::create() { |
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assert(_instance == NULL, "invariant"); |
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_instance = new JfrStackTraceRepository(); |
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return _instance; |
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} |
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void JfrStackTraceRepository::destroy() { |
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assert(_instance != NULL, "invarinat"); |
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delete _instance; |
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_instance = NULL; |
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} |
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JfrStackTraceRepository::JfrStackTraceRepository() : _next_id(0), _entries(0) { |
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memset(_table, 0, sizeof(_table)); |
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} |
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class JfrFrameType : public JfrSerializer { |
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public: |
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void serialize(JfrCheckpointWriter& writer) { |
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writer.write_count(JfrStackFrame::NUM_FRAME_TYPES); |
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writer.write_key(JfrStackFrame::FRAME_INTERPRETER); |
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writer.write("Interpreted"); |
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writer.write_key(JfrStackFrame::FRAME_JIT); |
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writer.write("JIT compiled"); |
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writer.write_key(JfrStackFrame::FRAME_INLINE); |
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writer.write("Inlined"); |
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writer.write_key(JfrStackFrame::FRAME_NATIVE); |
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writer.write("Native"); |
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} |
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}; |
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bool JfrStackTraceRepository::initialize() { |
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return JfrSerializer::register_serializer(TYPE_FRAMETYPE, false, true, new JfrFrameType()); |
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} |
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size_t JfrStackTraceRepository::clear() { |
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MutexLocker lock(JfrStacktrace_lock, Mutex::_no_safepoint_check_flag); |
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if (_entries == 0) { |
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return 0; |
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} |
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for (u4 i = 0; i < TABLE_SIZE; ++i) { |
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JfrStackTraceRepository::StackTrace* stacktrace = _table[i]; |
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while (stacktrace != NULL) { |
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JfrStackTraceRepository::StackTrace* next = stacktrace->next(); |
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delete stacktrace; |
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stacktrace = next; |
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} |
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} |
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memset(_table, 0, sizeof(_table)); |
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const size_t processed = _entries; |
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_entries = 0; |
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return processed; |
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} |
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traceid JfrStackTraceRepository::add_trace(const JfrStackTrace& stacktrace) { |
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MutexLocker lock(JfrStacktrace_lock, Mutex::_no_safepoint_check_flag); |
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const size_t index = stacktrace._hash % TABLE_SIZE; |
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const StackTrace* table_entry = _table[index]; |
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while (table_entry != NULL) { |
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if (table_entry->equals(stacktrace)) { |
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return table_entry->id(); |
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} |
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table_entry = table_entry->next(); |
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} |
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if (!stacktrace.have_lineno()) { |
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return 0; |
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} |
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traceid id = ++_next_id; |
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_table[index] = new StackTrace(id, stacktrace, _table[index]); |
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++_entries; |
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return id; |
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} |
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traceid JfrStackTraceRepository::add(const JfrStackTrace& stacktrace) { |
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return instance().add_trace(stacktrace); |
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} |
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traceid JfrStackTraceRepository::record(Thread* thread, int skip /* 0 */) { |
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assert(thread == Thread::current(), "invariant"); |
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JfrThreadLocal* const tl = thread->jfr_thread_local(); |
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assert(tl != NULL, "invariant"); |
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if (tl->has_cached_stack_trace()) { |
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return tl->cached_stack_trace_id(); |
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} |
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if (!thread->is_Java_thread() || thread->is_hidden_from_external_view()) { |
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return 0; |
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} |
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JfrStackFrame* frames = tl->stackframes(); |
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if (frames == NULL) { |
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// pending oom |
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return 0; |
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} |
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assert(frames != NULL, "invariant"); |
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assert(tl->stackframes() == frames, "invariant"); |
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return instance().record_for((JavaThread*)thread, skip,frames, tl->stackdepth()); |
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} |
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traceid JfrStackTraceRepository::record(Thread* thread, int skip, unsigned int* hash) { |
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assert(thread == Thread::current(), "invariant"); |
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JfrThreadLocal* const tl = thread->jfr_thread_local(); |
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assert(tl != NULL, "invariant"); |
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if (tl->has_cached_stack_trace()) { |
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*hash = tl->cached_stack_trace_hash(); |
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return tl->cached_stack_trace_id(); |
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} |
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if (!thread->is_Java_thread() || thread->is_hidden_from_external_view()) { |
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return 0; |
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} |
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JfrStackFrame* frames = tl->stackframes(); |
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if (frames == NULL) { |
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// pending oom |
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return 0; |
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} |
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assert(frames != NULL, "invariant"); |
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assert(tl->stackframes() == frames, "invariant"); |
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return instance().record_for((JavaThread*)thread, skip, frames, tl->stackdepth(), hash); |
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} |
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212 |
traceid JfrStackTraceRepository::record_for(JavaThread* thread, int skip, JfrStackFrame *frames, u4 max_frames) { |
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JfrStackTrace stacktrace(frames, max_frames); |
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if (!stacktrace.record_safe(thread, skip)) { |
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return 0; |
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} |
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traceid tid = add(stacktrace); |
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if (tid == 0) { |
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stacktrace.resolve_linenos(); |
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tid = add(stacktrace); |
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} |
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return tid; |
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} |
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traceid JfrStackTraceRepository::record_for(JavaThread* thread, int skip, JfrStackFrame *frames, u4 max_frames, unsigned int* hash) { |
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assert(hash != NULL && *hash == 0, "invariant"); |
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JfrStackTrace stacktrace(frames, max_frames); |
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if (!stacktrace.record_safe(thread, skip, true)) { |
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return 0; |
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} |
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traceid tid = add(stacktrace); |
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if (tid == 0) { |
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stacktrace.resolve_linenos(); |
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tid = add(stacktrace); |
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} |
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*hash = stacktrace._hash; |
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return tid; |
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} |
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240 |
size_t JfrStackTraceRepository::write_impl(JfrChunkWriter& sw, bool clear) { |
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MutexLocker lock(JfrStacktrace_lock, Mutex::_no_safepoint_check_flag); |
50113 | 242 |
assert(_entries > 0, "invariant"); |
243 |
int count = 0; |
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for (u4 i = 0; i < TABLE_SIZE; ++i) { |
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JfrStackTraceRepository::StackTrace* stacktrace = _table[i]; |
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while (stacktrace != NULL) { |
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JfrStackTraceRepository::StackTrace* next = stacktrace->next(); |
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if (stacktrace->should_write()) { |
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stacktrace->write(sw); |
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++count; |
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} |
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if (clear) { |
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delete stacktrace; |
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} |
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stacktrace = next; |
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} |
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} |
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if (clear) { |
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259 |
memset(_table, 0, sizeof(_table)); |
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260 |
_entries = 0; |
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261 |
} |
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262 |
return count; |
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263 |
} |
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264 |
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265 |
size_t JfrStackTraceRepository::write(JfrChunkWriter& sw, bool clear) { |
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266 |
return _entries > 0 ? write_impl(sw, clear) : 0; |
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} |
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268 |
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269 |
traceid JfrStackTraceRepository::write(JfrCheckpointWriter& writer, traceid id, unsigned int hash) { |
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assert(JfrStacktrace_lock->owned_by_self(), "invariant"); |
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const StackTrace* const trace = resolve_entry(hash, id); |
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assert(trace != NULL, "invariant"); |
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273 |
assert(trace->hash() == hash, "invariant"); |
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274 |
assert(trace->id() == id, "invariant"); |
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trace->write(writer); |
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276 |
return id; |
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277 |
} |
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278 |
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279 |
JfrStackTraceRepository::StackTrace::StackTrace(traceid id, const JfrStackTrace& trace, JfrStackTraceRepository::StackTrace* next) : |
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280 |
_next(next), |
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281 |
_frames(NULL), |
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282 |
_id(id), |
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283 |
_nr_of_frames(trace._nr_of_frames), |
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284 |
_hash(trace._hash), |
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285 |
_reached_root(trace._reached_root), |
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286 |
_written(false) { |
|
287 |
if (_nr_of_frames > 0) { |
|
288 |
_frames = NEW_C_HEAP_ARRAY(JfrStackFrame, _nr_of_frames, mtTracing); |
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289 |
memcpy(_frames, trace._frames, _nr_of_frames * sizeof(JfrStackFrame)); |
|
290 |
} |
|
291 |
} |
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292 |
||
293 |
JfrStackTraceRepository::StackTrace::~StackTrace() { |
|
294 |
if (_frames != NULL) { |
|
295 |
FREE_C_HEAP_ARRAY(JfrStackFrame, _frames); |
|
296 |
} |
|
297 |
} |
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298 |
||
299 |
bool JfrStackTraceRepository::StackTrace::equals(const JfrStackTrace& rhs) const { |
|
300 |
if (_reached_root != rhs._reached_root || _nr_of_frames != rhs._nr_of_frames || _hash != rhs._hash) { |
|
301 |
return false; |
|
302 |
} |
|
303 |
for (u4 i = 0; i < _nr_of_frames; ++i) { |
|
304 |
if (!_frames[i].equals(rhs._frames[i])) { |
|
305 |
return false; |
|
306 |
} |
|
307 |
} |
|
308 |
return true; |
|
309 |
} |
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310 |
||
311 |
template <typename Writer> |
|
312 |
static void write_stacktrace(Writer& w, traceid id, bool reached_root, u4 nr_of_frames, const JfrStackFrame* frames) { |
|
313 |
w.write((u8)id); |
|
314 |
w.write((u1)!reached_root); |
|
315 |
w.write(nr_of_frames); |
|
316 |
for (u4 i = 0; i < nr_of_frames; ++i) { |
|
317 |
frames[i].write(w); |
|
318 |
} |
|
319 |
} |
|
320 |
||
321 |
void JfrStackTraceRepository::StackTrace::write(JfrChunkWriter& sw) const { |
|
322 |
assert(!_written, "invariant"); |
|
323 |
write_stacktrace(sw, _id, _reached_root, _nr_of_frames, _frames); |
|
324 |
_written = true; |
|
325 |
} |
|
326 |
||
327 |
void JfrStackTraceRepository::StackTrace::write(JfrCheckpointWriter& cpw) const { |
|
328 |
write_stacktrace(cpw, _id, _reached_root, _nr_of_frames, _frames); |
|
329 |
} |
|
330 |
||
331 |
// JfrStackFrame |
|
332 |
||
333 |
bool JfrStackFrame::equals(const JfrStackFrame& rhs) const { |
|
334 |
return _methodid == rhs._methodid && _bci == rhs._bci && _type == rhs._type; |
|
335 |
} |
|
336 |
||
337 |
template <typename Writer> |
|
338 |
static void write_frame(Writer& w, traceid methodid, int line, int bci, u1 type) { |
|
339 |
w.write((u8)methodid); |
|
340 |
w.write((u4)line); |
|
341 |
w.write((u4)bci); |
|
342 |
w.write((u8)type); |
|
343 |
} |
|
344 |
||
345 |
void JfrStackFrame::write(JfrChunkWriter& cw) const { |
|
346 |
write_frame(cw, _methodid, _line, _bci, _type); |
|
347 |
} |
|
348 |
||
349 |
void JfrStackFrame::write(JfrCheckpointWriter& cpw) const { |
|
350 |
write_frame(cpw, _methodid, _line, _bci, _type); |
|
351 |
} |
|
352 |
||
353 |
// invariant is that the entry to be resolved actually exists in the table |
|
354 |
const JfrStackTraceRepository::StackTrace* JfrStackTraceRepository::resolve_entry(unsigned int hash, traceid id) const { |
|
355 |
const size_t index = (hash % TABLE_SIZE); |
|
356 |
const StackTrace* trace = _table[index]; |
|
357 |
while (trace != NULL && trace->id() != id) { |
|
358 |
trace = trace->next(); |
|
359 |
} |
|
360 |
assert(trace != NULL, "invariant"); |
|
361 |
assert(trace->hash() == hash, "invariant"); |
|
362 |
assert(trace->id() == id, "invariant"); |
|
363 |
return trace; |
|
364 |
} |
|
365 |
||
366 |
void JfrStackFrame::resolve_lineno() { |
|
367 |
assert(_method, "no method pointer"); |
|
368 |
assert(_line == 0, "already have linenumber"); |
|
369 |
_line = _method->line_number_from_bci(_bci); |
|
370 |
_method = NULL; |
|
371 |
} |
|
372 |
||
373 |
void JfrStackTrace::set_frame(u4 frame_pos, JfrStackFrame& frame) { |
|
374 |
assert(frame_pos < _max_frames, "illegal frame_pos"); |
|
375 |
_frames[frame_pos] = frame; |
|
376 |
} |
|
377 |
||
378 |
void JfrStackTrace::resolve_linenos() { |
|
379 |
for(unsigned int i = 0; i < _nr_of_frames; i++) { |
|
380 |
_frames[i].resolve_lineno(); |
|
381 |
} |
|
382 |
_lineno = true; |
|
383 |
} |
|
384 |
||
385 |
bool JfrStackTrace::record_safe(JavaThread* thread, int skip, bool leakp /* false */) { |
|
53775 | 386 |
assert(thread == Thread::current(), "Thread stack needs to be walkable"); |
50113 | 387 |
vframeStream vfs(thread); |
388 |
u4 count = 0; |
|
389 |
_reached_root = true; |
|
390 |
for(int i = 0; i < skip; i++) { |
|
391 |
if (vfs.at_end()) { |
|
392 |
break; |
|
393 |
} |
|
394 |
vfs.next(); |
|
395 |
} |
|
396 |
||
397 |
while (!vfs.at_end()) { |
|
398 |
if (count >= _max_frames) { |
|
399 |
_reached_root = false; |
|
400 |
break; |
|
401 |
} |
|
402 |
const Method* method = vfs.method(); |
|
403 |
const traceid mid = JfrTraceId::use(method, leakp); |
|
404 |
int type = vfs.is_interpreted_frame() ? JfrStackFrame::FRAME_INTERPRETER : JfrStackFrame::FRAME_JIT; |
|
405 |
int bci = 0; |
|
406 |
if (method->is_native()) { |
|
407 |
type = JfrStackFrame::FRAME_NATIVE; |
|
408 |
} else { |
|
409 |
bci = vfs.bci(); |
|
410 |
} |
|
411 |
// Can we determine if it's inlined? |
|
412 |
_hash = (_hash << 2) + (unsigned int)(((size_t)mid >> 2) + (bci << 4) + type); |
|
413 |
_frames[count] = JfrStackFrame(mid, bci, type, method); |
|
414 |
vfs.next(); |
|
415 |
count++; |
|
416 |
} |
|
417 |
||
418 |
_nr_of_frames = count; |
|
419 |
return true; |
|
420 |
} |
|
421 |
||
422 |
bool JfrStackTrace::record_thread(JavaThread& thread, frame& frame) { |
|
423 |
vframeStreamSamples st(&thread, frame, false); |
|
424 |
u4 count = 0; |
|
425 |
_reached_root = true; |
|
426 |
||
427 |
while (!st.at_end()) { |
|
428 |
if (count >= _max_frames) { |
|
429 |
_reached_root = false; |
|
430 |
break; |
|
431 |
} |
|
432 |
const Method* method = st.method(); |
|
51263
b5aac518b097
8207779: Method::is_valid_method() compares 'this' with NULL
hseigel
parents:
50117
diff
changeset
|
433 |
if (!Method::is_valid_method(method)) { |
50113 | 434 |
// we throw away everything we've gathered in this sample since |
435 |
// none of it is safe |
|
436 |
return false; |
|
437 |
} |
|
438 |
const traceid mid = JfrTraceId::use(method); |
|
439 |
int type = st.is_interpreted_frame() ? JfrStackFrame::FRAME_INTERPRETER : JfrStackFrame::FRAME_JIT; |
|
440 |
int bci = 0; |
|
441 |
if (method->is_native()) { |
|
442 |
type = JfrStackFrame::FRAME_NATIVE; |
|
443 |
} else { |
|
444 |
bci = st.bci(); |
|
445 |
} |
|
446 |
const int lineno = method->line_number_from_bci(bci); |
|
447 |
// Can we determine if it's inlined? |
|
448 |
_hash = (_hash << 2) + (unsigned int)(((size_t)mid >> 2) + (bci << 4) + type); |
|
449 |
_frames[count] = JfrStackFrame(mid, bci, type, lineno); |
|
450 |
st.samples_next(); |
|
451 |
count++; |
|
452 |
} |
|
453 |
||
454 |
_lineno = true; |
|
455 |
_nr_of_frames = count; |
|
456 |
return true; |
|
457 |
} |
|
458 |
||
459 |
void JfrStackTraceRepository::write_metadata(JfrCheckpointWriter& writer) { |
|
460 |
JfrFrameType fct; |
|
461 |
writer.write_type(TYPE_FRAMETYPE); |
|
462 |
fct.serialize(writer); |
|
463 |
} |