| /* |
| * Copyright (c) 2015, 2018, 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/dcmd/jfrDcmds.hpp" |
| #include "jfr/jfrEvents.hpp" |
| #include "jfr/periodic/jfrThreadDumpEvent.hpp" |
| #include "logging/log.hpp" |
| #include "utilities/exceptions.hpp" |
| #include "utilities/ostream.hpp" |
| |
| /** |
| * Worker impl for generating and writing dcmd commands |
| * as jfr events. |
| * dispatch to diagnosticcommands "parse_and_execute" |
| * |
| * param: cmd = the DCMD to execute (including options) |
| */ |
| static bool execute_dcmd(bufferedStream& st, const char* const cmd) { |
| Thread* THREAD = Thread::current(); |
| assert(!HAS_PENDING_EXCEPTION, "dcmd does not expect pending exceptions on entry!"); |
| // delegate to DCmd execution |
| DCmd::parse_and_execute(DCmd_Source_Internal, &st, cmd, ' ', THREAD); |
| if (HAS_PENDING_EXCEPTION) { |
| log_debug(jfr, system)("unable to create jfr event for DCMD %s", cmd); |
| log_debug(jfr, system)("exception type: %s", PENDING_EXCEPTION->klass()->external_name()); |
| // don't unwind this exception |
| CLEAR_PENDING_EXCEPTION; |
| // if exception occurred, |
| // reset stream. |
| st.reset(); |
| return false; |
| } |
| return true; |
| } |
| |
| // caller needs ResourceMark |
| const char* JfrDcmdEvent::thread_dump() { |
| assert(EventThreadDump::is_enabled(), "invariant"); |
| bufferedStream st; |
| execute_dcmd(st, "Thread.print"); |
| return st.as_string(); |
| } |