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