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1 /*
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2 * Copyright 2003-2006 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 package sun.jvm.hotspot.tools;
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26
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27 import java.io.*;
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28 import java.util.*;
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29 import sun.jvm.hotspot.code.*;
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30 import sun.jvm.hotspot.interpreter.*;
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31 import sun.jvm.hotspot.debugger.*;
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32 import sun.jvm.hotspot.debugger.cdbg.*;
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33 import sun.jvm.hotspot.oops.*;
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34 import sun.jvm.hotspot.runtime.*;
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35
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36 public class PStack extends Tool {
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37 // in non-verbose mode, methodOops are not printed in java frames
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38 public PStack(boolean v, boolean concurrentLocks) {
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39 this.verbose = v;
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40 this.concurrentLocks = concurrentLocks;
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41 }
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42
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43 public PStack() {
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44 this(true, true);
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45 }
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46
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47 public void run() {
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48 run(System.out);
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49 }
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50
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51 public void run(PrintStream out) {
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52 Debugger dbg = getAgent().getDebugger();
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53 run(out, dbg, getAgent().isJavaMode());
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54 }
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55
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56 public void run(PrintStream out, Debugger dbg) {
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57 run(out, dbg, true);
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58 }
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59
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60 private void run(PrintStream out, Debugger dbg, final boolean isJava) {
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61 CDebugger cdbg = dbg.getCDebugger();
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62 if (cdbg != null) {
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63 ConcurrentLocksPrinter concLocksPrinter = null;
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64 if (isJava) {
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65 // compute and cache java Vframes.
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66 initJFrameCache();
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67 if (concurrentLocks) {
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68 concLocksPrinter = new ConcurrentLocksPrinter();
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69 }
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70 // print Java level deadlocks
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71 try {
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72 DeadlockDetector.print(out);
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73 } catch (Exception exp) {
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74 out.println("can't print deadlock information: " + exp.getMessage());
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75 }
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76 }
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77
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78 List l = cdbg.getThreadList();
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79 final boolean cdbgCanDemangle = cdbg.canDemangle();
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80 for (Iterator itr = l.iterator() ; itr.hasNext();) {
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81 ThreadProxy th = (ThreadProxy) itr.next();
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82 try {
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83 CFrame f = cdbg.topFrameForThread(th);
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84 out.print("----------------- ");
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85 out.print(th);
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86 out.println(" -----------------");
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87 while (f != null) {
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88 ClosestSymbol sym = f.closestSymbolToPC();
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89 Address pc = f.pc();
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90 if (sym != null) {
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91 String name = sym.getName();
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92 if (cdbgCanDemangle) {
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93 name = cdbg.demangle(name);
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94 }
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95 out.print(pc + "\t" + name);
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96 long diff = sym.getOffset();
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97 if (diff != 0L) {
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98 out.print(" + 0x" + Long.toHexString(diff));
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99 }
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100 out.println();
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101 } else {
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102 if (isJava) {
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103 // look for one or more java frames
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104 String[] names = null;
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105 // check interpreter frame
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106 Interpreter interp = VM.getVM().getInterpreter();
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107 if (interp.contains(pc)) {
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108 names = getJavaNames(th, f.localVariableBase());
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109 // print codelet name if we can't determine method
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110 if (names == null || names.length == 0) {
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111 out.print("<interpreter> ");
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112 InterpreterCodelet ic = interp.getCodeletContaining(pc);
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113 if (ic != null) {
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114 String desc = ic.getDescription();
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115 if (desc != null) out.print(desc);
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116 }
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117 out.println();
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118 }
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119 } else {
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120 // look for known code blobs
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121 CodeCache c = VM.getVM().getCodeCache();
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122 if (c.contains(pc)) {
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123 out.print(pc + "\t");
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124 CodeBlob cb = c.findBlobUnsafe(pc);
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125 if (cb.isNMethod()) {
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126 names = getJavaNames(th, f.localVariableBase());
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127 // just print compiled code, if can't determine method
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128 if (names == null || names.length == 0) {
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129 out.println("<Unknown compiled code>");
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130 }
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131 } else if (cb.isBufferBlob()) {
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132 out.println("<StubRoutines>");
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133 } else if (cb.isRuntimeStub()) {
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134 out.println("<RuntimeStub>");
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135 } else if (cb.isDeoptimizationStub()) {
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136 out.println("<DeoptimizationStub>");
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137 } else if (cb.isUncommonTrapStub()) {
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138 out.println("<UncommonTrap>");
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139 } else if (cb.isExceptionStub()) {
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140 out.println("<ExceptionStub>");
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141 } else if (cb.isSafepointStub()) {
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142 out.println("<SafepointStub>");
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143 } else {
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144 out.println("<Unknown code blob>");
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145 }
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146 } else {
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147 printUnknown(out,pc);
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148 }
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149 }
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150 // print java frames, if any
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151 if (names != null && names.length != 0) {
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152 // print java frame(s)
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153 for (int i = 0; i < names.length; i++) {
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154 out.println(pc + "\t" + names[i]);
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155 }
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156 }
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157 } else {
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158 printUnknown(out,pc);
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159 }
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160 }
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161 f = f.sender();
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162 }
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163 } catch (Exception exp) {
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164 exp.printStackTrace();
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165 // continue, may be we can do a better job for other threads
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166 }
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167 if (isJava && concurrentLocks) {
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168 JavaThread jthread = (JavaThread) proxyToThread.get(th);
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169 if (jthread != null) {
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170 concLocksPrinter.print(jthread, out);
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171 }
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172 }
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173 } // for threads
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174 } else {
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175 if (getDebugeeType() == DEBUGEE_REMOTE) {
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176 out.println("remote configuration is not yet implemented");
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177 } else {
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178 out.println("not yet implemented (debugger does not support CDebugger)!");
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179 }
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180 }
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181 }
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182
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183 protected boolean requiresVM() {
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184 return false;
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185 }
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186
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187 public static void main(String[] args) throws Exception {
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188 PStack t = new PStack();
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189 t.start(args);
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190 t.stop();
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191 }
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192
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193 // -- Internals only below this point
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194 private Map jframeCache; // Map<ThreadProxy, JavaVFrame[]>
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195 private Map proxyToThread; // Map<ThreadProxy, JavaThread>
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196 private PrintStream out;
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197 private boolean verbose;
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198 private boolean concurrentLocks;
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199
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200 private void initJFrameCache() {
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201 // cache frames for subsequent reference
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202 jframeCache = new HashMap();
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203 proxyToThread = new HashMap();
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204 Threads threads = VM.getVM().getThreads();
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205 for (JavaThread cur = threads.first(); cur != null; cur = cur.next()) {
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206 List tmp = new ArrayList(10);
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207 try {
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208 for (JavaVFrame vf = cur.getLastJavaVFrameDbg(); vf != null; vf = vf.javaSender()) {
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209 tmp.add(vf);
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210 }
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211 } catch (Exception exp) {
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212 // may be we may get frames for other threads, continue
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213 // after printing stack trace.
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214 exp.printStackTrace();
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215 }
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216 JavaVFrame[] jvframes = new JavaVFrame[tmp.size()];
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217 System.arraycopy(tmp.toArray(), 0, jvframes, 0, jvframes.length);
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218 jframeCache.put(cur.getThreadProxy(), jvframes);
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219 proxyToThread.put(cur.getThreadProxy(), cur);
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220 }
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221 }
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222
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223 private void printUnknown(PrintStream out, Address pc) {
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224 out.println(pc + "\t????????");
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225 }
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226
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227 private String[] getJavaNames(ThreadProxy th, Address fp) {
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228 if (fp == null) {
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229 return null;
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230 }
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231 JavaVFrame[] jvframes = (JavaVFrame[]) jframeCache.get(th);
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232 if (jvframes == null) return null; // not a java thread
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233 List names = new ArrayList(10);
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234 for (int fCount = 0; fCount < jvframes.length; fCount++) {
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235 JavaVFrame vf = jvframes[fCount];
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236 Frame f = vf.getFrame();
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237 if (fp.equals(f.getFP())) {
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238 StringBuffer sb = new StringBuffer();
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239 Method method = vf.getMethod();
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240 // a special char to identify java frames in output
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241 sb.append("* ");
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242 sb.append(method.externalNameAndSignature());
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243 sb.append(" bci:" + vf.getBCI());
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244 int lineNumber = method.getLineNumberFromBCI(vf.getBCI());
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245 if (lineNumber != -1) {
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246 sb.append(" line:" + lineNumber);
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247 }
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248
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249 if (verbose) {
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250 sb.append(" methodOop:" + method.getHandle());
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251 }
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252
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253 if (vf.isCompiledFrame()) {
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254 sb.append(" (Compiled frame");
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255 if (vf.isDeoptimized()) {
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256 sb.append(" [deoptimized]");
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257 }
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258 } else if (vf.isInterpretedFrame()) {
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259 sb.append(" (Interpreted frame");
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260 }
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261 if (vf.mayBeImpreciseDbg()) {
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262 sb.append("; information may be imprecise");
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263 }
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264 sb.append(")");
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265 names.add(sb.toString());
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266 }
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267 }
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268 String[] res = new String[names.size()];
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269 System.arraycopy(names.toArray(), 0, res, 0, res.length);
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270 return res;
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271 }
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272 }
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