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comparison agent/test/libproc/LibprocClient.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 import sun.jvm.hotspot.oops.*;
26 import sun.jvm.hotspot.runtime.*;
27 import sun.jvm.hotspot.tools.*;
28 import sun.jvm.hotspot.utilities.*;
29
30 /**
31 We don't run any of the "standard" SA command line tools for sanity
32 check. This is because the standard tools print addresses in hex
33 which could change legally. Also, textual comparison of output may
34 not match because of other reasons as well. This tool checks
35 validity of threads and frames logically. This class has reference
36 frame names from "known" threads. The debuggee is assumed to run
37 "LibprocTest.java".
38 */
39
40 public class LibprocClient extends Tool {
41
42 public void run() {
43 // try to get VM version and check
44 String version = VM.getVM().getVMRelease();
45 Assert.that(version.startsWith("1.5"), "1.5 expected");
46
47 // try getting threads
48 Threads threads = VM.getVM().getThreads();
49 boolean mainTested = false;
50
51 // check frames of each thread
52 for (JavaThread cur = threads.first(); cur != null; cur = cur.next()) {
53 if (cur.isJavaThread()) {
54 String name = cur.getThreadName();
55 // testing of basic frame walking for all threads
56 for (JavaVFrame vf = getLastJavaVFrame(cur); vf != null; vf = vf.javaSender()) {
57 checkFrame(vf);
58 }
59
60 // special testing for "known" threads. For now, only "main" thread.
61 if (name.equals("main")) {
62 checkMainThread(cur);
63 mainTested = true;
64 }
65 }
66 }
67 Assert.that(mainTested, "main thread missing");
68 }
69
70 public static void main(String[] args) {
71 try {
72 LibprocClient lc = new LibprocClient();
73 lc.start(args);
74 lc.getAgent().detach();
75 System.out.println("\nPASSED\n");
76 } catch (Exception exp) {
77 System.out.println("\nFAILED\n");
78 exp.printStackTrace();
79 }
80 }
81
82 // -- Internals only below this point
83 private static JavaVFrame getLastJavaVFrame(JavaThread cur) {
84 RegisterMap regMap = cur.newRegisterMap(true);
85 Frame f = cur.getCurrentFrameGuess();
86 if (f == null) {
87 System.err.println(" (Unable to get a top most frame)");
88 return null;
89 }
90 VFrame vf = VFrame.newVFrame(f, regMap, cur, true, true);
91 if (vf == null) {
92 System.err.println(" (Unable to create vframe for topmost frame guess)");
93 return null;
94 }
95 if (vf.isJavaFrame()) {
96 return (JavaVFrame) vf;
97 }
98 return (JavaVFrame) vf.javaSender();
99 }
100
101 private void checkMethodSignature(Symbol sig) {
102 SignatureIterator itr = new SignatureIterator(sig) {
103 public void doBool () {}
104 public void doChar () {}
105 public void doFloat () {}
106 public void doDouble() {}
107 public void doByte () {}
108 public void doShort () {}
109 public void doInt () {}
110 public void doLong () {}
111 public void doVoid () {}
112 public void doObject(int begin, int end) {}
113 public void doArray (int begin, int end) {}
114 };
115 // this will throw RuntimeException for any invalid item in signature.
116 itr.iterate();
117 }
118
119 private void checkBCI(Method m, int bci) {
120 if (! m.isNative()) {
121 byte[] buf = m.getByteCode();
122 Assert.that(bci >= 0 && bci < buf.length, "invalid bci, not in code range");
123 if (m.hasLineNumberTable()) {
124 int lineNum = m.getLineNumberFromBCI(bci);
125 Assert.that(lineNum >= 0, "expecting non-negative line number");
126 }
127 }
128 }
129
130 private void checkMethodHolder(Method method) {
131 Klass klass = method.getMethodHolder();
132 Assert.that(klass != null, "expecting non-null instance klass");
133 }
134
135 private void checkFrame(JavaVFrame vf) {
136 Method method = vf.getMethod();
137 Assert.that(method != null, "expecting a non-null method here");
138 Assert.that(method.getName() != null, "expecting non-null method name");
139 checkMethodHolder(method);
140 checkMethodSignature(method.getSignature());
141 checkBCI(method, vf.getBCI());
142 }
143
144 // from the test case LibprocTest.java - in the main thread we
145 // should see frames as below
146 private static String[] mainThreadMethods = new String[] {
147 "java.lang.Object.wait(long)",
148 "java.lang.Object.wait()",
149 "LibprocTest.main(java.lang.String[])"
150 };
151
152 private void checkMainThread(JavaThread thread) {
153 checkFrames(thread, mainThreadMethods);
154 }
155
156 private void checkFrames(JavaThread thread, String[] expectedMethodNames) {
157 int i = 0;
158 for (JavaVFrame vf = getLastJavaVFrame(thread); vf != null; vf = vf.javaSender(), i++) {
159 Method m = vf.getMethod();
160 Assert.that(m.externalNameAndSignature().equals(expectedMethodNames[i]),
161 "expected frame missing");
162 }
163 }
164 }