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agent/test/libproc/LibprocClient.java@5380dc5d007e (annotated)

agent/test/libproc/LibprocClient.java

Fri, 28 Feb 2014 13:36:09 -0800

author

katleman

date

Fri, 28 Feb 2014 13:36:09 -0800

changeset 6364

5380dc5d007e

parent 1907

c18cbe5936b8

child 6876

710a3c8b516e

permissions

-rw-r--r--

Added tag jdk8-b131 for changeset b5e7ebfe185c

duke@435	1	/*
trims@1907	2	* Copyright (c) 2003, 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
duke@435	25	import sun.jvm.hotspot.oops.*;
duke@435	26	import sun.jvm.hotspot.runtime.*;
duke@435	27	import sun.jvm.hotspot.tools.*;
duke@435	28	import sun.jvm.hotspot.utilities.*;
duke@435	29
duke@435	30	/**
duke@435	31	We don't run any of the "standard" SA command line tools for sanity
duke@435	32	check. This is because the standard tools print addresses in hex
duke@435	33	which could change legally. Also, textual comparison of output may
duke@435	34	not match because of other reasons as well. This tool checks
duke@435	35	validity of threads and frames logically. This class has reference
duke@435	36	frame names from "known" threads. The debuggee is assumed to run
duke@435	37	"LibprocTest.java".
duke@435	38	*/
duke@435	39
duke@435	40	public class LibprocClient extends Tool {
duke@435	41
duke@435	42	public void run() {
duke@435	43	// try to get VM version and check
duke@435	44	String version = VM.getVM().getVMRelease();
duke@435	45	Assert.that(version.startsWith("1.5"), "1.5 expected");
duke@435	46
duke@435	47	// try getting threads
duke@435	48	Threads threads = VM.getVM().getThreads();
duke@435	49	boolean mainTested = false;
duke@435	50
duke@435	51	// check frames of each thread
duke@435	52	for (JavaThread cur = threads.first(); cur != null; cur = cur.next()) {
duke@435	53	if (cur.isJavaThread()) {
duke@435	54	String name = cur.getThreadName();
duke@435	55	// testing of basic frame walking for all threads
duke@435	56	for (JavaVFrame vf = getLastJavaVFrame(cur); vf != null; vf = vf.javaSender()) {
duke@435	57	checkFrame(vf);
duke@435	58	}
duke@435	59
duke@435	60	// special testing for "known" threads. For now, only "main" thread.
duke@435	61	if (name.equals("main")) {
duke@435	62	checkMainThread(cur);
duke@435	63	mainTested = true;
duke@435	64	}
duke@435	65	}
duke@435	66	}
duke@435	67	Assert.that(mainTested, "main thread missing");
duke@435	68	}
duke@435	69
duke@435	70	public static void main(String[] args) {
duke@435	71	try {
duke@435	72	LibprocClient lc = new LibprocClient();
duke@435	73	lc.start(args);
duke@435	74	lc.getAgent().detach();
duke@435	75	System.out.println("\nPASSED\n");
duke@435	76	} catch (Exception exp) {
duke@435	77	System.out.println("\nFAILED\n");
duke@435	78	exp.printStackTrace();
duke@435	79	}
duke@435	80	}
duke@435	81
duke@435	82	// -- Internals only below this point
duke@435	83	private static JavaVFrame getLastJavaVFrame(JavaThread cur) {
duke@435	84	RegisterMap regMap = cur.newRegisterMap(true);
duke@435	85	Frame f = cur.getCurrentFrameGuess();
duke@435	86	if (f == null) {
duke@435	87	System.err.println(" (Unable to get a top most frame)");
duke@435	88	return null;
duke@435	89	}
duke@435	90	VFrame vf = VFrame.newVFrame(f, regMap, cur, true, true);
duke@435	91	if (vf == null) {
duke@435	92	System.err.println(" (Unable to create vframe for topmost frame guess)");
duke@435	93	return null;
duke@435	94	}
duke@435	95	if (vf.isJavaFrame()) {
duke@435	96	return (JavaVFrame) vf;
duke@435	97	}
duke@435	98	return (JavaVFrame) vf.javaSender();
duke@435	99	}
duke@435	100
duke@435	101	private void checkMethodSignature(Symbol sig) {
duke@435	102	SignatureIterator itr = new SignatureIterator(sig) {
duke@435	103	public void doBool () {}
duke@435	104	public void doChar () {}
duke@435	105	public void doFloat () {}
duke@435	106	public void doDouble() {}
duke@435	107	public void doByte () {}
duke@435	108	public void doShort () {}
duke@435	109	public void doInt () {}
duke@435	110	public void doLong () {}
duke@435	111	public void doVoid () {}
duke@435	112	public void doObject(int begin, int end) {}
duke@435	113	public void doArray (int begin, int end) {}
duke@435	114	};
duke@435	115	// this will throw RuntimeException for any invalid item in signature.
duke@435	116	itr.iterate();
duke@435	117	}
duke@435	118
duke@435	119	private void checkBCI(Method m, int bci) {
duke@435	120	if (! m.isNative()) {
duke@435	121	byte[] buf = m.getByteCode();
duke@435	122	Assert.that(bci >= 0 && bci < buf.length, "invalid bci, not in code range");
duke@435	123	if (m.hasLineNumberTable()) {
duke@435	124	int lineNum = m.getLineNumberFromBCI(bci);
duke@435	125	Assert.that(lineNum >= 0, "expecting non-negative line number");
duke@435	126	}
duke@435	127	}
duke@435	128	}
duke@435	129
duke@435	130	private void checkMethodHolder(Method method) {
duke@435	131	Klass klass = method.getMethodHolder();
duke@435	132	Assert.that(klass != null, "expecting non-null instance klass");
duke@435	133	}
duke@435	134
duke@435	135	private void checkFrame(JavaVFrame vf) {
duke@435	136	Method method = vf.getMethod();
duke@435	137	Assert.that(method != null, "expecting a non-null method here");
duke@435	138	Assert.that(method.getName() != null, "expecting non-null method name");
duke@435	139	checkMethodHolder(method);
duke@435	140	checkMethodSignature(method.getSignature());
duke@435	141	checkBCI(method, vf.getBCI());
duke@435	142	}
duke@435	143
duke@435	144	// from the test case LibprocTest.java - in the main thread we
duke@435	145	// should see frames as below
duke@435	146	private static String[] mainThreadMethods = new String[] {
duke@435	147	"java.lang.Object.wait(long)",
duke@435	148	"java.lang.Object.wait()",
duke@435	149	"LibprocTest.main(java.lang.String[])"
duke@435	150	};
duke@435	151
duke@435	152	private void checkMainThread(JavaThread thread) {
duke@435	153	checkFrames(thread, mainThreadMethods);
duke@435	154	}
duke@435	155
duke@435	156	private void checkFrames(JavaThread thread, String[] expectedMethodNames) {
duke@435	157	int i = 0;
duke@435	158	for (JavaVFrame vf = getLastJavaVFrame(thread); vf != null; vf = vf.javaSender(), i++) {
duke@435	159	Method m = vf.getMethod();
duke@435	160	Assert.that(m.externalNameAndSignature().equals(expectedMethodNames[i]),
duke@435	161	"expected frame missing");
duke@435	162	}
duke@435	163	}
duke@435	164	}