JDK 11 jdk.hotspot.agent.jmod - Hotspot Agent Module

JDK 11 jdk.hotspot.agent.jmod is the JMOD file for JDK 11 Hotspot Agent module.

JDK 11 Hotspot Agent module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.hotspot.agent.jmod.

JDK 11 Hotspot Agent module compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 Hotspot Agent module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.hotspot.agent.

You can click and view the content of each source code file in the list below.

✍: FYIcenter

sun/jvm/hotspot/tools/PStack.java

/*
 * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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package sun.jvm.hotspot.tools;

import java.io.*;
import java.util.*;
import sun.jvm.hotspot.code.*;
import sun.jvm.hotspot.interpreter.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.debugger.cdbg.*;
import sun.jvm.hotspot.oops.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.utilities.PlatformInfo;

public class PStack extends Tool {
    // in non-verbose mode, Method*s are not printed in java frames
   public PStack(boolean v, boolean concurrentLocks) {
      this.verbose = v;
      this.concurrentLocks = concurrentLocks;
   }

   public PStack() {
      this(true, true);
   }

   public PStack(JVMDebugger d) {
      super(d);
   }

   public void run() {
      run(System.out);
   }

   public void run(PrintStream out) {
      Debugger dbg = getAgent().getDebugger();
      run(out, dbg);
   }

   public void run(PrintStream out, Debugger dbg) {
      if (PlatformInfo.getOS().equals("darwin")) {
        out.println("Not available on Darwin");
        return;
      }

      CDebugger cdbg = dbg.getCDebugger();
      if (cdbg != null) {
         ConcurrentLocksPrinter concLocksPrinter = null;
         // compute and cache java Vframes.
         initJFrameCache();
         if (concurrentLocks) {
            concLocksPrinter = new ConcurrentLocksPrinter();
         }
         // print Java level deadlocks
         try {
            DeadlockDetector.print(out);
         } catch (Exception exp) {
            out.println("can't print deadlock information: " + exp.getMessage());
         }

         List l = cdbg.getThreadList();
         final boolean cdbgCanDemangle = cdbg.canDemangle();
         for (Iterator itr = l.iterator() ; itr.hasNext();) {
            ThreadProxy th = (ThreadProxy) itr.next();
            try {
               CFrame f = cdbg.topFrameForThread(th);
               out.print("----------------- ");
               out.print(th);
               out.println(" -----------------");
               JavaThread jthread = (JavaThread) proxyToThread.get(th);
               if (jthread != null) {
                  jthread.printThreadInfoOn(out);
               }
               while (f != null) {
                  ClosestSymbol sym = f.closestSymbolToPC();
                  Address pc = f.pc();
                  out.print(pc + "\t");
                  if (sym != null) {
                     String name = sym.getName();
                     if (cdbgCanDemangle) {
                        name = cdbg.demangle(name);
                     }
                     out.print(name);
                     long diff = sym.getOffset();
                     if (diff != 0L) {
                        out.print(" + 0x" + Long.toHexString(diff));
                     }
                     out.println();
                  } else {
                      // look for one or more java frames
                      String[] names = null;
                      // check interpreter frame
                      Interpreter interp = VM.getVM().getInterpreter();
                      if (interp.contains(pc)) {
                         names = getJavaNames(th, f.localVariableBase());
                         // print codelet name if we can't determine method
                         if (names == null || names.length == 0) {
                            out.print("<interpreter> ");
                            InterpreterCodelet ic = interp.getCodeletContaining(pc);
                            if (ic != null) {
                               String desc = ic.getDescription();
                               if (desc != null) out.print(desc);
                            }
                            out.println();
                         }
                      } else {
                         // look for known code blobs
                         CodeCache c = VM.getVM().getCodeCache();
                         if (c.contains(pc)) {
                            CodeBlob cb = c.findBlobUnsafe(pc);
                            if (cb.isNMethod()) {
                               names = getJavaNames(th, f.localVariableBase());
                               // just print compiled code, if can't determine method
                               if (names == null || names.length == 0) {
                                  out.println("<Unknown compiled code>");
                               }
                            } else if (cb.isBufferBlob()) {
                               out.println("<StubRoutines>");
                            } else if (cb.isRuntimeStub()) {
                               out.println("<RuntimeStub>");
                            } else if (cb.isDeoptimizationStub()) {
                               out.println("<DeoptimizationStub>");
                            } else if (cb.isUncommonTrapStub()) {
                               out.println("<UncommonTrap>");
                            } else if (cb.isExceptionStub()) {
                               out.println("<ExceptionStub>");
                            } else if (cb.isSafepointStub()) {
                               out.println("<SafepointStub>");
                            } else {
                               out.println("<Unknown code blob>");
                            }
                         } else {
                            printUnknown(out);
                         }
                      }
                      // print java frames, if any
                      if (names != null && names.length != 0) {
                         // print java frame(s)
                         for (int i = 0; i < names.length; i++) {
                             out.println(names[i]);
                         }
                      }
                  }
                  f = f.sender(th);
               }
            } catch (Exception exp) {
               exp.printStackTrace();
               // continue, may be we can do a better job for other threads
            }
            if (concurrentLocks) {
               JavaThread jthread = (JavaThread) proxyToThread.get(th);
               if (jthread != null) {
                   concLocksPrinter.print(jthread, out);
               }
            }
         } // for threads
      } else {
          if (getDebugeeType() == DEBUGEE_REMOTE) {
              out.println("remote configuration is not yet implemented");
          } else {
              out.println("not yet implemented (debugger does not support CDebugger)!");
          }
      }
   }

   public static void main(String[] args) throws Exception {
      PStack t = new PStack();
      t.execute(args);
   }

   // -- Internals only below this point
   private Map jframeCache; // Map<ThreadProxy, JavaVFrame[]>
   private Map proxyToThread; // Map<ThreadProxy, JavaThread>
   private PrintStream out;
   private boolean verbose;
   private boolean concurrentLocks;

   private void initJFrameCache() {
      // cache frames for subsequent reference
      jframeCache = new HashMap();
      proxyToThread = new HashMap();
      Threads threads = VM.getVM().getThreads();
      for (JavaThread cur = threads.first(); cur != null; cur = cur.next()) {
         List tmp = new ArrayList(10);
         try {
            for (JavaVFrame vf = cur.getLastJavaVFrameDbg(); vf != null; vf = vf.javaSender()) {
               tmp.add(vf);
            }
         } catch (Exception exp) {
            // may be we may get frames for other threads, continue
            // after printing stack trace.
            exp.printStackTrace();
         }
         JavaVFrame[] jvframes = new JavaVFrame[tmp.size()];
         System.arraycopy(tmp.toArray(), 0, jvframes, 0, jvframes.length);
         jframeCache.put(cur.getThreadProxy(), jvframes);
         proxyToThread.put(cur.getThreadProxy(), cur);
      }
   }

   private void printUnknown(PrintStream out) {
      out.println("\t????????");
   }

   private String[] getJavaNames(ThreadProxy th, Address fp) {
      if (fp == null) {
         return null;
      }
      JavaVFrame[] jvframes = (JavaVFrame[]) jframeCache.get(th);
      if (jvframes == null) return null; // not a java thread
      List names = new ArrayList(10);
      for (int fCount = 0; fCount < jvframes.length; fCount++) {
         JavaVFrame vf = jvframes[fCount];
         Frame f = vf.getFrame();
         if (fp.equals(f.getFP())) {
            StringBuffer sb = new StringBuffer();
            Method method = vf.getMethod();
            // a special char to identify java frames in output
            sb.append("* ");
            sb.append(method.externalNameAndSignature());
            sb.append(" bci:" + vf.getBCI());
            int lineNumber = method.getLineNumberFromBCI(vf.getBCI());
            if (lineNumber != -1) {
                sb.append(" line:" + lineNumber);
            }

            if (verbose) {
               sb.append(" Method*:" + method.getAddress());
            }

            if (vf.isCompiledFrame()) {
               sb.append(" (Compiled frame");
               if (vf.isDeoptimized()) {
                 sb.append(" [deoptimized]");
               }
            } else if (vf.isInterpretedFrame()) {
               sb.append(" (Interpreted frame");
            }
            if (vf.mayBeImpreciseDbg()) {
               sb.append("; information may be imprecise");
            }
            sb.append(")");
            names.add(sb.toString());
         }
      }
      String[] res = new String[names.size()];
      System.arraycopy(names.toArray(), 0, res, 0, res.length);
      return res;
   }
}

sun/jvm/hotspot/tools/PStack.java

 

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