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src/share/vm/services/runtimeService.cpp@17c778814856 (annotated)

src/share/vm/services/runtimeService.cpp

Fri, 14 Jan 2011 13:47:53 -0500

author

coleenp

date

Fri, 14 Jan 2011 13:47:53 -0500

changeset 2463

17c778814856

parent 2314

f95d63e2154a

child 3202

436b4a3231bf

permissions

-rw-r--r--

6811367: Fix code in HeapDumper::dump_heap() to avoid buffer overrun
Summary: Check buffer size before using and use dynamic buffer sizes for subsequent calls.
Reviewed-by: kamg, dholmes

duke@435	1	/*
trims@1907	2	* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#include "precompiled.hpp"
stefank@2314	26	#include "classfile/classLoader.hpp"
stefank@2314	27	#include "services/attachListener.hpp"
stefank@2314	28	#include "services/management.hpp"
stefank@2314	29	#include "services/runtimeService.hpp"
stefank@2314	30	#include "utilities/dtrace.hpp"
stefank@2314	31	#include "utilities/exceptions.hpp"
duke@435	32
duke@435	33	HS_DTRACE_PROBE_DECL(hs_private, safepoint__begin);
duke@435	34	HS_DTRACE_PROBE_DECL(hs_private, safepoint__end);
duke@435	35
duke@435	36	TimeStamp RuntimeService::_app_timer;
duke@435	37	TimeStamp RuntimeService::_safepoint_timer;
duke@435	38	PerfCounter* RuntimeService::_sync_time_ticks = NULL;
duke@435	39	PerfCounter* RuntimeService::_total_safepoints = NULL;
duke@435	40	PerfCounter* RuntimeService::_safepoint_time_ticks = NULL;
duke@435	41	PerfCounter* RuntimeService::_application_time_ticks = NULL;
duke@435	42	PerfCounter* RuntimeService::_thread_interrupt_signaled_count = NULL;
duke@435	43	PerfCounter* RuntimeService::_interrupted_before_count = NULL;
duke@435	44	PerfCounter* RuntimeService::_interrupted_during_count = NULL;
duke@435	45
duke@435	46	void RuntimeService::init() {
duke@435	47	// Make sure the VM version is initialized
duke@435	48	Abstract_VM_Version::initialize();
duke@435	49
duke@435	50	if (UsePerfData) {
duke@435	51	EXCEPTION_MARK;
duke@435	52
duke@435	53	_sync_time_ticks =
duke@435	54	PerfDataManager::create_counter(SUN_RT, "safepointSyncTime",
duke@435	55	PerfData::U_Ticks, CHECK);
duke@435	56
duke@435	57	_total_safepoints =
duke@435	58	PerfDataManager::create_counter(SUN_RT, "safepoints",
duke@435	59	PerfData::U_Events, CHECK);
duke@435	60
duke@435	61	_safepoint_time_ticks =
duke@435	62	PerfDataManager::create_counter(SUN_RT, "safepointTime",
duke@435	63	PerfData::U_Ticks, CHECK);
duke@435	64
duke@435	65	_application_time_ticks =
duke@435	66	PerfDataManager::create_counter(SUN_RT, "applicationTime",
duke@435	67	PerfData::U_Ticks, CHECK);
duke@435	68
duke@435	69
duke@435	70	// create performance counters for jvm_version and its capabilities
duke@435	71	PerfDataManager::create_constant(SUN_RT, "jvmVersion", PerfData::U_None,
duke@435	72	(jlong) Abstract_VM_Version::jvm_version(), CHECK);
duke@435	73
duke@435	74	// I/O interruption related counters
duke@435	75
duke@435	76	// thread signaling via os::interrupt()
duke@435	77
duke@435	78	_thread_interrupt_signaled_count =
duke@435	79	PerfDataManager::create_counter(SUN_RT,
duke@435	80	"threadInterruptSignaled", PerfData::U_Events, CHECK);
duke@435	81
duke@435	82	// OS_INTRPT via "check before" in _INTERRUPTIBLE
duke@435	83
duke@435	84	_interrupted_before_count =
duke@435	85	PerfDataManager::create_counter(SUN_RT, "interruptedBeforeIO",
duke@435	86	PerfData::U_Events, CHECK);
duke@435	87
duke@435	88	// OS_INTRPT via "check during" in _INTERRUPTIBLE
duke@435	89
duke@435	90	_interrupted_during_count =
duke@435	91	PerfDataManager::create_counter(SUN_RT, "interruptedDuringIO",
duke@435	92	PerfData::U_Events, CHECK);
duke@435	93
duke@435	94	// The capabilities counter is a binary representation of the VM capabilities in string.
duke@435	95	// This string respresentation simplifies the implementation of the client side
duke@435	96	// to parse the value.
duke@435	97	char capabilities[65];
duke@435	98	size_t len = sizeof(capabilities);
duke@435	99	memset((void*) capabilities, '0', len);
duke@435	100	capabilities[len-1] = '\0';
duke@435	101	capabilities[0] = AttachListener::is_attach_supported() ? '1' : '0';
duke@435	102	#ifdef KERNEL
duke@435	103	capabilities[1] = '1';
duke@435	104	#endif // KERNEL
duke@435	105	PerfDataManager::create_string_constant(SUN_RT, "jvmCapabilities",
duke@435	106	capabilities, CHECK);
duke@435	107	}
duke@435	108	}
duke@435	109
duke@435	110	void RuntimeService::record_safepoint_begin() {
duke@435	111	HS_DTRACE_PROBE(hs_private, safepoint__begin);
johnc@1695	112
johnc@1695	113	// Print the time interval in which the app was executing
johnc@1695	114	if (PrintGCApplicationConcurrentTime) {
johnc@1695	115	gclog_or_tty->print_cr("Application time: %3.7f seconds",
johnc@1695	116	last_application_time_sec());
johnc@1695	117	}
johnc@1695	118
duke@435	119	// update the time stamp to begin recording safepoint time
duke@435	120	_safepoint_timer.update();
duke@435	121	if (UsePerfData) {
duke@435	122	_total_safepoints->inc();
duke@435	123	if (_app_timer.is_updated()) {
duke@435	124	_application_time_ticks->inc(_app_timer.ticks_since_update());
duke@435	125	}
duke@435	126	}
duke@435	127	}
duke@435	128
duke@435	129	void RuntimeService::record_safepoint_synchronized() {
duke@435	130	if (UsePerfData) {
duke@435	131	_sync_time_ticks->inc(_safepoint_timer.ticks_since_update());
duke@435	132	}
duke@435	133	}
duke@435	134
duke@435	135	void RuntimeService::record_safepoint_end() {
duke@435	136	HS_DTRACE_PROBE(hs_private, safepoint__end);
johnc@1695	137
johnc@1695	138	// Print the time interval for which the app was stopped
johnc@1695	139	// during the current safepoint operation.
johnc@1695	140	if (PrintGCApplicationStoppedTime) {
johnc@1695	141	gclog_or_tty->print_cr("Total time for which application threads "
johnc@1695	142	"were stopped: %3.7f seconds",
johnc@1695	143	last_safepoint_time_sec());
johnc@1695	144	}
johnc@1695	145
duke@435	146	// update the time stamp to begin recording app time
duke@435	147	_app_timer.update();
duke@435	148	if (UsePerfData) {
duke@435	149	_safepoint_time_ticks->inc(_safepoint_timer.ticks_since_update());
duke@435	150	}
duke@435	151	}
duke@435	152
duke@435	153	void RuntimeService::record_application_start() {
duke@435	154	// update the time stamp to begin recording app time
duke@435	155	_app_timer.update();
duke@435	156	}
duke@435	157
duke@435	158	// Don't need to record application end because we currently
duke@435	159	// exit at a safepoint and record_safepoint_begin() handles updating
duke@435	160	// the application time counter at VM exit.
duke@435	161
duke@435	162	jlong RuntimeService::safepoint_sync_time_ms() {
duke@435	163	return UsePerfData ?
duke@435	164	Management::ticks_to_ms(_sync_time_ticks->get_value()) : -1;
duke@435	165	}
duke@435	166
duke@435	167	jlong RuntimeService::safepoint_count() {
duke@435	168	return UsePerfData ?
duke@435	169	_total_safepoints->get_value() : -1;
duke@435	170	}
duke@435	171	jlong RuntimeService::safepoint_time_ms() {
duke@435	172	return UsePerfData ?
duke@435	173	Management::ticks_to_ms(_safepoint_time_ticks->get_value()) : -1;
duke@435	174	}
duke@435	175
duke@435	176	jlong RuntimeService::application_time_ms() {
duke@435	177	return UsePerfData ?
duke@435	178	Management::ticks_to_ms(_application_time_ticks->get_value()) : -1;
duke@435	179	}
duke@435	180
duke@435	181	void RuntimeService::record_interrupted_before_count() {
duke@435	182	if (UsePerfData) {
duke@435	183	_interrupted_before_count->inc();
duke@435	184	}
duke@435	185	}
duke@435	186
duke@435	187	void RuntimeService::record_interrupted_during_count() {
duke@435	188	if (UsePerfData) {
duke@435	189	_interrupted_during_count->inc();
duke@435	190	}
duke@435	191	}
duke@435	192
duke@435	193	void RuntimeService::record_thread_interrupt_signaled_count() {
duke@435	194	if (UsePerfData) {
duke@435	195	_thread_interrupt_signaled_count->inc();
duke@435	196	}
duke@435	197	}