1 /*
2 * Copyright (c) 2003, 2018, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 package nsk.jvmti.PopFrame;
25
26 import nsk.share.Wicket;
27 import java.io.PrintStream;
28
29 /**
30 * This test checks that a frame can be popped and<br>
31 * no JVMTI events would be generated by the JVMTI function
32 * <code>PopFrame()</code>.<br>
33 * The test creates an instance of inner class <code>popFrameCls</code>
34 * and start it in a separate thread. Then the test pops frame
35 * from the thread's stack of the class <code>popFrameCls</code>.
36 */
37 public class popframe001 {
38 static final int PASSED = 0;
39 static final int FAILED = 2;
40 static final int JCK_STATUS_BASE = 95;
41
42 static boolean DEBUG_MODE = false;
43 static volatile boolean popFdone = false;
44 static volatile int totRes = PASSED;
45 private PrintStream out;
46 private popFrameCls popFrameClsThr;
47 static Object barrier = new Object();
48 static Wicket startingBarrier;
49
50 static {
51 try {
52 System.loadLibrary("popframe001");
53 } catch (UnsatisfiedLinkError e) {
54 System.err.println("Could not load popframe001 library");
55 System.err.println("java.library.path:" +
56 System.getProperty("java.library.path"));
57 throw e;
58 }
59 }
60
61 native static int doPopFrame(int vrb, popFrameCls popFrameClsThr);
62 native static int suspThread(int vrb, popFrameCls popFrameClsThr);
63 native static int resThread(int vrb, popFrameCls popFrameClsThr);
64
65 public static void main(String[] argv) {
66 argv = nsk.share.jvmti.JVMTITest.commonInit(argv);
67
68 System.exit(run(argv, System.out) + JCK_STATUS_BASE);
69 }
70
71 public static int run(String argv[], PrintStream out) {
72 return new popframe001().runIt(argv, out);
73 }
74
75 private int runIt(String argv[], PrintStream out) {
76 int retValue = 0;
77
78 this.out = out;
79 for (int i = 0; i < argv.length; i++) {
80 if (argv[i].equals("-v")) // verbose mode
81 DEBUG_MODE = true;
82 }
83
84 popFrameClsThr = new popFrameCls("Tested Thread");
85 startingBarrier = new Wicket();
86 // start the child thread
87 popFrameClsThr.start();
88 startingBarrier.waitFor();
89 // pause until the child thread exits notification-block
90 synchronized (barrier) {
91 }
92
93 if (DEBUG_MODE) {
94 out.println("Going to suspend the thread...");
95 retValue = suspThread(1, popFrameClsThr);
96 } else
97 retValue = suspThread(0, popFrameClsThr);
98 if (retValue != PASSED) {
99 out.println("TEST: failed to suspend thread");
100 return FAILED;
101 }
102
103 // pop a frame of the child thread
104 if (DEBUG_MODE) {
105 out.println("Going to pop a frame...");
106 retValue = doPopFrame(1, popFrameClsThr);
107 } else
108 retValue = doPopFrame(0, popFrameClsThr);
109 popFdone = true;
110 popFrameClsThr.letItGo();
111 if (retValue != PASSED) {
112 out.println("TEST: failed to pop frame");
113 resThread(0, popFrameClsThr);
114 return FAILED;
115 }
116
117 if (DEBUG_MODE) {
118 out.println("Going to resume the thread...");
119 retValue = resThread(1, popFrameClsThr);
120 } else
121 retValue = resThread(0, popFrameClsThr);
122 if (retValue != PASSED) {
123 out.println("TEST: failed to resume thread");
124 return FAILED;
125 }
126
127 try {
128 popFrameClsThr.join();
129 } catch (InterruptedException e) {
130 out.println("TEST INCOMPLETE: caught " + e);
131 return FAILED;
132 }
133
134 return totRes;
135 }
136
137 class popFrameCls extends Thread {
138 private volatile boolean flag = true;
139
140 popFrameCls(String name) {
141 super(name);
142 }
143
144 public void run() {
145 activeMethod();
146 if (DEBUG_MODE)
147 out.println("popFrameCls (" + this +
148 "): exiting...");
149 }
150
151 public void activeMethod() {
152 boolean compl = true; // complain in a finally block
153
154 if (popframe001.popFdone) { // popping has been done
155 if (DEBUG_MODE)
156 out.println("popFrameCls (" + this +
157 "): enter activeMethod() after popping");
158 return;
159 }
160 try {
161 // notify the main thread
162 synchronized (popframe001.barrier) {
163 if (DEBUG_MODE)
164 out.println("popFrameCls (" + this +
165 "): notifying main thread");
166 popframe001.startingBarrier.unlock();
167 if (DEBUG_MODE)
168 out.println("popFrameCls (" + this +
169 "): inside activeMethod()");
170 }
171 // loop until the main thread pops us
172 int i = 0;
173 int n = 1000;
174 while (flag) {
175 if (n <= 0) {
176 n = 1000;
177 }
178 if (i > n) {
179 i = 0;
180 n--;
181 }
182 i++;
183 }
184 if (popframe001.popFdone) { // popping has been done
185 out.println("TEST FAILED: a tested frame has not been really popped");
186 popframe001.totRes = FAILED;
187 compl = false;
188 }
189 } catch (Exception e) {
190 out.println("FAILURE: popFrameCls (" + this + "): caught " + e);
191 popframe001.totRes = FAILED;
192 compl = false;
193 } finally {
194 if (compl) {
195 out.println("TEST FAILED: finally block was executed after PopFrame()");
196 popframe001.totRes = FAILED;
197 }
198 }
199 }
200
201 public void letItGo() {
202 flag = false;
203 }
204 }
205 }