1 /*
2 * Copyright (c) 2003, 2013, 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
25 package sun.jvm.hotspot.tools;
26
27 import java.io.*;
28 import java.util.*;
29 import sun.jvm.hotspot.code.*;
30 import sun.jvm.hotspot.interpreter.*;
31 import sun.jvm.hotspot.debugger.*;
32 import sun.jvm.hotspot.debugger.cdbg.*;
33 import sun.jvm.hotspot.oops.*;
34 import sun.jvm.hotspot.runtime.*;
35 import sun.jvm.hotspot.utilities.PlatformInfo;
36
37 public class PStack extends Tool {
38 // in non-verbose mode, Method*s are not printed in java frames
39 public PStack(boolean v, boolean concurrentLocks) {
40 this.verbose = v;
41 this.concurrentLocks = concurrentLocks;
42 }
43
44 public PStack() {
45 this(true, true);
46 }
47
48 public PStack(JVMDebugger d) {
49 super(d);
50 }
51
52 public void run() {
53 run(System.out);
54 }
55
56 public void run(PrintStream out) {
57 Debugger dbg = getAgent().getDebugger();
58 run(out, dbg);
59 }
60
61 public void run(PrintStream out, Debugger dbg) {
62 if (PlatformInfo.getOS().equals("darwin")) {
63 out.println("Not available on Darwin");
64 return;
65 }
66
67 CDebugger cdbg = dbg.getCDebugger();
68 if (cdbg != null) {
69 ConcurrentLocksPrinter concLocksPrinter = null;
70 // compute and cache java Vframes.
71 initJFrameCache();
72 if (concurrentLocks) {
73 concLocksPrinter = new ConcurrentLocksPrinter();
74 }
75 // print Java level deadlocks
76 try {
77 DeadlockDetector.print(out);
78 } catch (Exception exp) {
79 out.println("can't print deadlock information: " + exp.getMessage());
80 }
81
82 List l = cdbg.getThreadList();
83 final boolean cdbgCanDemangle = cdbg.canDemangle();
84 for (Iterator itr = l.iterator() ; itr.hasNext();) {
85 ThreadProxy th = (ThreadProxy) itr.next();
86 try {
87 CFrame f = cdbg.topFrameForThread(th);
88 out.print("----------------- ");
89 out.print(th);
90 out.println(" -----------------");
91 while (f != null) {
92 ClosestSymbol sym = f.closestSymbolToPC();
93 Address pc = f.pc();
94 out.print(pc + "\t");
95 if (sym != null) {
96 String name = sym.getName();
97 if (cdbgCanDemangle) {
98 name = cdbg.demangle(name);
99 }
100 out.print(name);
101 long diff = sym.getOffset();
102 if (diff != 0L) {
103 out.print(" + 0x" + Long.toHexString(diff));
104 }
105 out.println();
106 } else {
107 // look for one or more java frames
108 String[] names = null;
109 // check interpreter frame
110 Interpreter interp = VM.getVM().getInterpreter();
111 if (interp.contains(pc)) {
112 names = getJavaNames(th, f.localVariableBase());
113 // print codelet name if we can't determine method
114 if (names == null || names.length == 0) {
115 out.print("<interpreter> ");
116 InterpreterCodelet ic = interp.getCodeletContaining(pc);
117 if (ic != null) {
118 String desc = ic.getDescription();
119 if (desc != null) out.print(desc);
120 }
121 out.println();
122 }
123 } else {
124 // look for known code blobs
125 CodeCache c = VM.getVM().getCodeCache();
126 if (c.contains(pc)) {
127 CodeBlob cb = c.findBlobUnsafe(pc);
128 if (cb.isNMethod()) {
129 names = getJavaNames(th, f.localVariableBase());
130 // just print compiled code, if can't determine method
131 if (names == null || names.length == 0) {
132 out.println("<Unknown compiled code>");
133 }
134 } else if (cb.isBufferBlob()) {
135 out.println("<StubRoutines>");
136 } else if (cb.isRuntimeStub()) {
137 out.println("<RuntimeStub>");
138 } else if (cb.isDeoptimizationStub()) {
139 out.println("<DeoptimizationStub>");
140 } else if (cb.isUncommonTrapStub()) {
141 out.println("<UncommonTrap>");
142 } else if (cb.isExceptionStub()) {
143 out.println("<ExceptionStub>");
144 } else if (cb.isSafepointStub()) {
145 out.println("<SafepointStub>");
146 } else {
147 out.println("<Unknown code blob>");
148 }
149 } else {
150 printUnknown(out);
151 }
152 }
153 // print java frames, if any
154 if (names != null && names.length != 0) {
155 // print java frame(s)
156 for (int i = 0; i < names.length; i++) {
157 out.println(names[i]);
158 }
159 }
160 }
161 f = f.sender(th);
162 }
163 } catch (Exception exp) {
164 exp.printStackTrace();
165 // continue, may be we can do a better job for other threads
166 }
167 if (concurrentLocks) {
168 JavaThread jthread = (JavaThread) proxyToThread.get(th);
169 if (jthread != null) {
170 concLocksPrinter.print(jthread, out);
171 }
172 }
173 } // for threads
174 } else {
175 if (getDebugeeType() == DEBUGEE_REMOTE) {
176 out.println("remote configuration is not yet implemented");
177 } else {
178 out.println("not yet implemented (debugger does not support CDebugger)!");
179 }
180 }
181 }
182
183 public static void main(String[] args) throws Exception {
184 PStack t = new PStack();
185 t.start(args);
186 t.stop();
187 }
188
189 // -- Internals only below this point
190 private Map jframeCache; // Map<ThreadProxy, JavaVFrame[]>
191 private Map proxyToThread; // Map<ThreadProxy, JavaThread>
192 private PrintStream out;
193 private boolean verbose;
194 private boolean concurrentLocks;
195
196 private void initJFrameCache() {
197 // cache frames for subsequent reference
198 jframeCache = new HashMap();
199 proxyToThread = new HashMap();
200 Threads threads = VM.getVM().getThreads();
201 for (JavaThread cur = threads.first(); cur != null; cur = cur.next()) {
202 List tmp = new ArrayList(10);
203 try {
204 for (JavaVFrame vf = cur.getLastJavaVFrameDbg(); vf != null; vf = vf.javaSender()) {
205 tmp.add(vf);
206 }
207 } catch (Exception exp) {
208 // may be we may get frames for other threads, continue
209 // after printing stack trace.
210 exp.printStackTrace();
211 }
212 JavaVFrame[] jvframes = new JavaVFrame[tmp.size()];
213 System.arraycopy(tmp.toArray(), 0, jvframes, 0, jvframes.length);
214 jframeCache.put(cur.getThreadProxy(), jvframes);
215 proxyToThread.put(cur.getThreadProxy(), cur);
216 }
217 }
218
219 private void printUnknown(PrintStream out) {
220 out.println("\t????????");
221 }
222
223 private String[] getJavaNames(ThreadProxy th, Address fp) {
224 if (fp == null) {
225 return null;
226 }
227 JavaVFrame[] jvframes = (JavaVFrame[]) jframeCache.get(th);
228 if (jvframes == null) return null; // not a java thread
229 List names = new ArrayList(10);
230 for (int fCount = 0; fCount < jvframes.length; fCount++) {
231 JavaVFrame vf = jvframes[fCount];
232 Frame f = vf.getFrame();
233 if (fp.equals(f.getFP())) {
234 StringBuffer sb = new StringBuffer();
235 Method method = vf.getMethod();
236 // a special char to identify java frames in output
237 sb.append("* ");
238 sb.append(method.externalNameAndSignature());
239 sb.append(" bci:" + vf.getBCI());
240 int lineNumber = method.getLineNumberFromBCI(vf.getBCI());
241 if (lineNumber != -1) {
242 sb.append(" line:" + lineNumber);
243 }
244
245 if (verbose) {
246 sb.append(" Method*:" + method.getAddress());
247 }
248
249 if (vf.isCompiledFrame()) {
250 sb.append(" (Compiled frame");
251 if (vf.isDeoptimized()) {
252 sb.append(" [deoptimized]");
253 }
254 } else if (vf.isInterpretedFrame()) {
255 sb.append(" (Interpreted frame");
256 }
257 if (vf.mayBeImpreciseDbg()) {
258 sb.append("; information may be imprecise");
259 }
260 sb.append(")");
261 names.add(sb.toString());
262 }
263 }
264 String[] res = new String[names.size()];
265 System.arraycopy(names.toArray(), 0, res, 0, res.length);
266 return res;
267 }
268 }