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