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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 | } | ||