| /* |
| * Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "jfr/metadata/jfrSerializer.hpp" |
| #include "jfr/recorder/checkpoint/jfrCheckpointWriter.hpp" |
| #include "jfr/recorder/repository/jfrChunkWriter.hpp" |
| #include "jfr/recorder/stacktrace/jfrStackTraceRepository.hpp" |
| #include "jfr/support/jfrThreadLocal.hpp" |
| #include "runtime/mutexLocker.hpp" |
| |
| static JfrStackTraceRepository* _instance = NULL; |
| |
| JfrStackTraceRepository::JfrStackTraceRepository() : _next_id(0), _entries(0) { |
| memset(_table, 0, sizeof(_table)); |
| } |
| |
| JfrStackTraceRepository& JfrStackTraceRepository::instance() { |
| return *_instance; |
| } |
| |
| JfrStackTraceRepository* JfrStackTraceRepository::create() { |
| assert(_instance == NULL, "invariant"); |
| _instance = new JfrStackTraceRepository(); |
| return _instance; |
| } |
| |
| class JfrFrameType : public JfrSerializer { |
| public: |
| void serialize(JfrCheckpointWriter& writer) { |
| writer.write_count(JfrStackFrame::NUM_FRAME_TYPES); |
| writer.write_key(JfrStackFrame::FRAME_INTERPRETER); |
| writer.write("Interpreted"); |
| writer.write_key(JfrStackFrame::FRAME_JIT); |
| writer.write("JIT compiled"); |
| writer.write_key(JfrStackFrame::FRAME_INLINE); |
| writer.write("Inlined"); |
| writer.write_key(JfrStackFrame::FRAME_NATIVE); |
| writer.write("Native"); |
| } |
| }; |
| |
| bool JfrStackTraceRepository::initialize() { |
| return JfrSerializer::register_serializer(TYPE_FRAMETYPE, true, new JfrFrameType()); |
| } |
| |
| void JfrStackTraceRepository::destroy() { |
| assert(_instance != NULL, "invarinat"); |
| delete _instance; |
| _instance = NULL; |
| } |
| |
| static traceid last_id = 0; |
| |
| bool JfrStackTraceRepository::is_modified() const { |
| return last_id != _next_id; |
| } |
| |
| size_t JfrStackTraceRepository::write(JfrChunkWriter& sw, bool clear) { |
| if (_entries == 0) { |
| return 0; |
| } |
| MutexLocker lock(JfrStacktrace_lock, Mutex::_no_safepoint_check_flag); |
| assert(_entries > 0, "invariant"); |
| int count = 0; |
| for (u4 i = 0; i < TABLE_SIZE; ++i) { |
| JfrStackTrace* stacktrace = _table[i]; |
| while (stacktrace != NULL) { |
| JfrStackTrace* next = const_cast<JfrStackTrace*>(stacktrace->next()); |
| if (stacktrace->should_write()) { |
| stacktrace->write(sw); |
| ++count; |
| } |
| if (clear) { |
| delete stacktrace; |
| } |
| stacktrace = next; |
| } |
| } |
| if (clear) { |
| memset(_table, 0, sizeof(_table)); |
| _entries = 0; |
| } |
| last_id = _next_id; |
| return count; |
| } |
| |
| size_t JfrStackTraceRepository::clear() { |
| MutexLocker lock(JfrStacktrace_lock, Mutex::_no_safepoint_check_flag); |
| if (_entries == 0) { |
| return 0; |
| } |
| for (u4 i = 0; i < TABLE_SIZE; ++i) { |
| JfrStackTrace* stacktrace = _table[i]; |
| while (stacktrace != NULL) { |
| JfrStackTrace* next = const_cast<JfrStackTrace*>(stacktrace->next()); |
| delete stacktrace; |
| stacktrace = next; |
| } |
| } |
| memset(_table, 0, sizeof(_table)); |
| const size_t processed = _entries; |
| _entries = 0; |
| return processed; |
| } |
| |
| traceid JfrStackTraceRepository::record(Thread* thread, int skip /* 0 */) { |
| assert(thread == Thread::current(), "invariant"); |
| JfrThreadLocal* const tl = thread->jfr_thread_local(); |
| assert(tl != NULL, "invariant"); |
| if (tl->has_cached_stack_trace()) { |
| return tl->cached_stack_trace_id(); |
| } |
| if (!thread->is_Java_thread() || thread->is_hidden_from_external_view() || tl->is_excluded()) { |
| return 0; |
| } |
| JfrStackFrame* frames = tl->stackframes(); |
| if (frames == NULL) { |
| // pending oom |
| return 0; |
| } |
| assert(frames != NULL, "invariant"); |
| assert(tl->stackframes() == frames, "invariant"); |
| return instance().record_for((JavaThread*)thread, skip, frames, tl->stackdepth()); |
| } |
| |
| traceid JfrStackTraceRepository::record_for(JavaThread* thread, int skip, JfrStackFrame *frames, u4 max_frames) { |
| JfrStackTrace stacktrace(frames, max_frames); |
| return stacktrace.record_safe(thread, skip) ? add(stacktrace) : 0; |
| } |
| |
| traceid JfrStackTraceRepository::add(const JfrStackTrace& stacktrace) { |
| traceid tid = instance().add_trace(stacktrace); |
| if (tid == 0) { |
| stacktrace.resolve_linenos(); |
| tid = instance().add_trace(stacktrace); |
| } |
| assert(tid != 0, "invariant"); |
| return tid; |
| } |
| |
| void JfrStackTraceRepository::record_and_cache(JavaThread* thread, int skip /* 0 */) { |
| assert(thread != NULL, "invariant"); |
| JfrThreadLocal* const tl = thread->jfr_thread_local(); |
| assert(tl != NULL, "invariant"); |
| assert(!tl->has_cached_stack_trace(), "invariant"); |
| JfrStackTrace stacktrace(tl->stackframes(), tl->stackdepth()); |
| stacktrace.record_safe(thread, skip); |
| const unsigned int hash = stacktrace.hash(); |
| if (hash != 0) { |
| tl->set_cached_stack_trace_id(instance().add(stacktrace), hash); |
| } |
| } |
| |
| traceid JfrStackTraceRepository::add_trace(const JfrStackTrace& stacktrace) { |
| MutexLocker lock(JfrStacktrace_lock, Mutex::_no_safepoint_check_flag); |
| const size_t index = stacktrace._hash % TABLE_SIZE; |
| const JfrStackTrace* table_entry = _table[index]; |
| |
| while (table_entry != NULL) { |
| if (table_entry->equals(stacktrace)) { |
| return table_entry->id(); |
| } |
| table_entry = table_entry->next(); |
| } |
| |
| if (!stacktrace.have_lineno()) { |
| return 0; |
| } |
| |
| traceid id = ++_next_id; |
| _table[index] = new JfrStackTrace(id, stacktrace, _table[index]); |
| ++_entries; |
| return id; |
| } |
| |
| // invariant is that the entry to be resolved actually exists in the table |
| const JfrStackTrace* JfrStackTraceRepository::lookup(unsigned int hash, traceid id) const { |
| const size_t index = (hash % TABLE_SIZE); |
| const JfrStackTrace* trace = _table[index]; |
| while (trace != NULL && trace->id() != id) { |
| trace = trace->next(); |
| } |
| assert(trace != NULL, "invariant"); |
| assert(trace->hash() == hash, "invariant"); |
| assert(trace->id() == id, "invariant"); |
| return trace; |
| } |