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| 1 | +/* | |
| 2 | + * Copyright (c) 1998, 1999, 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. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package com.sun.tools.example.debug.bdi; | |
| 27 | + | |
| 28 | +import com.sun.jdi.VirtualMachine; | |
| 29 | +import com.sun.jdi.VMDisconnectedException; | |
| 30 | + | |
| 31 | +/** | |
| 32 | + * Our repository of what we know about the state of one | |
| 33 | + * running VM. | |
| 34 | + */ | |
| 35 | +class Session { | |
| 36 | + | |
| 37 | + final VirtualMachine vm; | |
| 38 | + final ExecutionManager runtime; | |
| 39 | + final OutputListener diagnostics; | |
| 40 | + | |
| 41 | + boolean running = true; // Set false by JDIEventSource | |
| 42 | + boolean interrupted = false; // Set false by JDIEventSource | |
| 43 | + | |
| 44 | + private JDIEventSource eventSourceThread = null; | |
| 45 | + private int traceFlags; | |
| 46 | + private boolean dead = false; | |
| 47 | + | |
| 48 | + public Session(VirtualMachine vm, ExecutionManager runtime, | |
| 49 | + OutputListener diagnostics) { | |
| 50 | + this.vm = vm; | |
| 51 | + this.runtime = runtime; | |
| 52 | + this.diagnostics = diagnostics; | |
| 53 | + this.traceFlags = VirtualMachine.TRACE_NONE; | |
| 54 | + } | |
| 55 | + | |
| 56 | + /** | |
| 57 | + * Determine if VM is interrupted, i.e, present and not running. | |
| 58 | + */ | |
| 59 | + public boolean isInterrupted() { | |
| 60 | + return interrupted; | |
| 61 | + } | |
| 62 | + | |
| 63 | + public void setTraceMode(int traceFlags) { | |
| 64 | + this.traceFlags = traceFlags; | |
| 65 | + if (!dead) { | |
| 66 | + vm.setDebugTraceMode(traceFlags); | |
| 67 | + } | |
| 68 | + } | |
| 69 | + | |
| 70 | + public boolean attach() { | |
| 71 | + vm.setDebugTraceMode(traceFlags); | |
| 72 | + diagnostics.putString("Connected to VM"); | |
| 73 | + eventSourceThread = new JDIEventSource(this); | |
| 74 | + eventSourceThread.start(); | |
| 75 | + return true; | |
| 76 | + } | |
| 77 | + | |
| 78 | + public void detach() { | |
| 79 | + if (!dead) { | |
| 80 | + eventSourceThread.interrupt(); | |
| 81 | + eventSourceThread = null; | |
| 82 | + //### The VM may already be disconnected | |
| 83 | + //### if the debuggee did a System.exit(). | |
| 84 | + //### Exception handler here is a kludge, | |
| 85 | + //### Rather, there are many other places | |
| 86 | + //### where we need to handle this exception, | |
| 87 | + //### and initiate a detach due to an error | |
| 88 | + //### condition, e.g., connection failure. | |
| 89 | + try { | |
| 90 | + vm.dispose(); | |
| 91 | + } catch (VMDisconnectedException ee) {} | |
| 92 | + dead = true; | |
| 93 | + diagnostics.putString("Disconnected from VM"); | |
| 94 | + } | |
| 95 | + } | |
| 96 | +} | |