feat(jdk8): move files to new folder to avoid resources compiled.

jdkSrc/jdk8/com/sun/tools/example/trace/EventThread.java

@@ -0,0 +1,353 @@
+/*
+ * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This source code is provided to illustrate the usage of a given feature
+ * or technique and has been deliberately simplified. Additional steps
+ * required for a production-quality application, such as security checks,
+ * input validation and proper error handling, might not be present in
+ * this sample code.
+ */
+
+
+package com.sun.tools.example.trace;
+
+import com.sun.jdi.*;
+import com.sun.jdi.request.*;
+import com.sun.jdi.event.*;
+
+import java.util.*;
+import java.io.PrintWriter;
+
+/**
+ * This class processes incoming JDI events and displays them
+ *
+ * @author Robert Field
+ */
+public class EventThread extends Thread {
+
+    private final VirtualMachine vm;   // Running VM
+    private final String[] excludes;   // Packages to exclude
+    private final PrintWriter writer;  // Where output goes
+
+    static String nextBaseIndent = ""; // Starting indent for next thread
+
+    private boolean connected = true;  // Connected to VM
+    private boolean vmDied = true;     // VMDeath occurred
+
+    // Maps ThreadReference to ThreadTrace instances
+    private Map<ThreadReference, ThreadTrace> traceMap =
+       new HashMap<>();
+
+    EventThread(VirtualMachine vm, String[] excludes, PrintWriter writer) {
+        super("event-handler");
+        this.vm = vm;
+        this.excludes = excludes;
+        this.writer = writer;
+    }
+
+    /**
+     * Run the event handling thread.
+     * As long as we are connected, get event sets off
+     * the queue and dispatch the events within them.
+     */
+    @Override
+    public void run() {
+        EventQueue queue = vm.eventQueue();
+        while (connected) {
+            try {
+                EventSet eventSet = queue.remove();
+                EventIterator it = eventSet.eventIterator();
+                while (it.hasNext()) {
+                    handleEvent(it.nextEvent());
+                }
+                eventSet.resume();
+            } catch (InterruptedException exc) {
+                // Ignore
+            } catch (VMDisconnectedException discExc) {
+                handleDisconnectedException();
+                break;
+            }
+        }
+    }
+
+    /**
+     * Create the desired event requests, and enable
+     * them so that we will get events.
+     * @param excludes     Class patterns for which we don't want events
+     * @param watchFields  Do we want to watch assignments to fields
+     */
+    void setEventRequests(boolean watchFields) {
+        EventRequestManager mgr = vm.eventRequestManager();
+
+        // want all exceptions
+        ExceptionRequest excReq = mgr.createExceptionRequest(null,
+                                                             true, true);
+        // suspend so we can step
+        excReq.setSuspendPolicy(EventRequest.SUSPEND_ALL);
+        excReq.enable();
+
+        MethodEntryRequest menr = mgr.createMethodEntryRequest();
+        for (int i=0; i<excludes.length; ++i) {
+            menr.addClassExclusionFilter(excludes[i]);
+        }
+        menr.setSuspendPolicy(EventRequest.SUSPEND_NONE);
+        menr.enable();
+
+        MethodExitRequest mexr = mgr.createMethodExitRequest();
+        for (int i=0; i<excludes.length; ++i) {
+            mexr.addClassExclusionFilter(excludes[i]);
+        }
+        mexr.setSuspendPolicy(EventRequest.SUSPEND_NONE);
+        mexr.enable();
+
+        ThreadDeathRequest tdr = mgr.createThreadDeathRequest();
+        // Make sure we sync on thread death
+        tdr.setSuspendPolicy(EventRequest.SUSPEND_ALL);
+        tdr.enable();
+
+        if (watchFields) {
+            ClassPrepareRequest cpr = mgr.createClassPrepareRequest();
+            for (int i=0; i<excludes.length; ++i) {
+                cpr.addClassExclusionFilter(excludes[i]);
+            }
+            cpr.setSuspendPolicy(EventRequest.SUSPEND_ALL);
+            cpr.enable();
+        }
+    }
+
+    /**
+     * This class keeps context on events in one thread.
+     * In this implementation, context is the indentation prefix.
+     */
+    class ThreadTrace {
+        final ThreadReference thread;
+        final String baseIndent;
+        static final String threadDelta = "                     ";
+        StringBuffer indent;
+
+        ThreadTrace(ThreadReference thread) {
+            this.thread = thread;
+            this.baseIndent = nextBaseIndent;
+            indent = new StringBuffer(baseIndent);
+            nextBaseIndent += threadDelta;
+            println("====== " + thread.name() + " ======");
+        }
+
+        private void println(String str) {
+            writer.print(indent);
+            writer.println(str);
+        }
+
+        void methodEntryEvent(MethodEntryEvent event)  {
+            println(event.method().name() + "  --  "
+                    + event.method().declaringType().name());
+            indent.append("| ");
+        }
+
+        void methodExitEvent(MethodExitEvent event)  {
+            indent.setLength(indent.length()-2);
+        }
+
+        void fieldWatchEvent(ModificationWatchpointEvent event)  {
+            Field field = event.field();
+            Value value = event.valueToBe();
+            println("    " + field.name() + " = " + value);
+        }
+
+        void exceptionEvent(ExceptionEvent event) {
+            println("Exception: " + event.exception() +
+                    " catch: " + event.catchLocation());
+
+            // Step to the catch
+            EventRequestManager mgr = vm.eventRequestManager();
+            StepRequest req = mgr.createStepRequest(thread,
+                                                    StepRequest.STEP_MIN,
+                                                    StepRequest.STEP_INTO);
+            req.addCountFilter(1);  // next step only
+            req.setSuspendPolicy(EventRequest.SUSPEND_ALL);
+            req.enable();
+        }
+
+        // Step to exception catch
+        void stepEvent(StepEvent event)  {
+            // Adjust call depth
+            int cnt = 0;
+            indent = new StringBuffer(baseIndent);
+            try {
+                cnt = thread.frameCount();
+            } catch (IncompatibleThreadStateException exc) {
+            }
+            while (cnt-- > 0) {
+                indent.append("| ");
+            }
+
+            EventRequestManager mgr = vm.eventRequestManager();
+            mgr.deleteEventRequest(event.request());
+        }
+
+        void threadDeathEvent(ThreadDeathEvent event)  {
+            indent = new StringBuffer(baseIndent);
+            println("====== " + thread.name() + " end ======");
+        }
+    }
+
+    /**
+     * Returns the ThreadTrace instance for the specified thread,
+     * creating one if needed.
+     */
+    ThreadTrace threadTrace(ThreadReference thread) {
+        ThreadTrace trace = traceMap.get(thread);
+        if (trace == null) {
+            trace = new ThreadTrace(thread);
+            traceMap.put(thread, trace);
+        }
+        return trace;
+    }
+
+    /**
+     * Dispatch incoming events
+     */
+    private void handleEvent(Event event) {
+        if (event instanceof ExceptionEvent) {
+            exceptionEvent((ExceptionEvent)event);
+        } else if (event instanceof ModificationWatchpointEvent) {
+            fieldWatchEvent((ModificationWatchpointEvent)event);
+        } else if (event instanceof MethodEntryEvent) {
+            methodEntryEvent((MethodEntryEvent)event);
+        } else if (event instanceof MethodExitEvent) {
+            methodExitEvent((MethodExitEvent)event);
+        } else if (event instanceof StepEvent) {
+            stepEvent((StepEvent)event);
+        } else if (event instanceof ThreadDeathEvent) {
+            threadDeathEvent((ThreadDeathEvent)event);
+        } else if (event instanceof ClassPrepareEvent) {
+            classPrepareEvent((ClassPrepareEvent)event);
+        } else if (event instanceof VMStartEvent) {
+            vmStartEvent((VMStartEvent)event);
+        } else if (event instanceof VMDeathEvent) {
+            vmDeathEvent((VMDeathEvent)event);
+        } else if (event instanceof VMDisconnectEvent) {
+            vmDisconnectEvent((VMDisconnectEvent)event);
+        } else {
+            throw new Error("Unexpected event type");
+        }
+    }
+
+    /***
+     * A VMDisconnectedException has happened while dealing with
+     * another event. We need to flush the event queue, dealing only
+     * with exit events (VMDeath, VMDisconnect) so that we terminate
+     * correctly.
+     */
+    synchronized void handleDisconnectedException() {
+        EventQueue queue = vm.eventQueue();
+        while (connected) {
+            try {
+                EventSet eventSet = queue.remove();
+                EventIterator iter = eventSet.eventIterator();
+                while (iter.hasNext()) {
+                    Event event = iter.nextEvent();
+                    if (event instanceof VMDeathEvent) {
+                        vmDeathEvent((VMDeathEvent)event);
+                    } else if (event instanceof VMDisconnectEvent) {
+                        vmDisconnectEvent((VMDisconnectEvent)event);
+                    }
+                }
+                eventSet.resume(); // Resume the VM
+            } catch (InterruptedException exc) {
+                // ignore
+            }
+        }
+    }
+
+    private void vmStartEvent(VMStartEvent event)  {
+         writer.println("-- VM Started --");
+    }
+
+    // Forward event for thread specific processing
+    private void methodEntryEvent(MethodEntryEvent event)  {
+         threadTrace(event.thread()).methodEntryEvent(event);
+    }
+
+    // Forward event for thread specific processing
+    private void methodExitEvent(MethodExitEvent event)  {
+         threadTrace(event.thread()).methodExitEvent(event);
+    }
+
+    // Forward event for thread specific processing
+    private void stepEvent(StepEvent event)  {
+         threadTrace(event.thread()).stepEvent(event);
+    }
+
+    // Forward event for thread specific processing
+    private void fieldWatchEvent(ModificationWatchpointEvent event)  {
+         threadTrace(event.thread()).fieldWatchEvent(event);
+    }
+
+    void threadDeathEvent(ThreadDeathEvent event)  {
+        ThreadTrace trace = traceMap.get(event.thread());
+        if (trace != null) {  // only want threads we care about
+            trace.threadDeathEvent(event);   // Forward event
+        }
+    }
+
+    /**
+     * A new class has been loaded.
+     * Set watchpoints on each of its fields
+     */
+    private void classPrepareEvent(ClassPrepareEvent event)  {
+        EventRequestManager mgr = vm.eventRequestManager();
+        List<Field> fields = event.referenceType().visibleFields();
+        for (Field field : fields) {
+            ModificationWatchpointRequest req =
+                     mgr.createModificationWatchpointRequest(field);
+            for (int i=0; i<excludes.length; ++i) {
+                req.addClassExclusionFilter(excludes[i]);
+            }
+            req.setSuspendPolicy(EventRequest.SUSPEND_NONE);
+            req.enable();
+        }
+    }
+
+    private void exceptionEvent(ExceptionEvent event) {
+        ThreadTrace trace = traceMap.get(event.thread());
+        if (trace != null) {  // only want threads we care about
+            trace.exceptionEvent(event);      // Forward event
+        }
+    }
+
+    public void vmDeathEvent(VMDeathEvent event) {
+        vmDied = true;
+        writer.println("-- The application exited --");
+    }
+
+    public void vmDisconnectEvent(VMDisconnectEvent event) {
+        connected = false;
+        if (!vmDied) {
+            writer.println("-- The application has been disconnected --");
+        }
+    }
+}