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1 /*
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2 * Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.debugger.cdbg;
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26
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27 import sun.jvm.hotspot.debugger.*;
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28
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29 /** Describes in an abstract sense the kind of debug events which may
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30 be received from the target process. On UNIX platforms these are
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31 typically signals intercepted via ptrace or some other mechanism,
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32 while on Windows they are usually exceptions. Also describes
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33 certain types of events like loading and unloading of DSOs/DLLs
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34 ("LoadObjects"). */
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35
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36 public interface DebugEvent {
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37 public static class Type {
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38 private Type() {}
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39 /** Indicates a DSO/DLL was loaded by the target process */
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40 public static final Type LOADOBJECT_LOAD = new Type();
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41 /** Indicates a DSO/DLL was unloaded by the target process */
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42 public static final Type LOADOBJECT_UNLOAD = new Type();
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43 /** Indicates a breakpoint was hit */
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44 public static final Type BREAKPOINT = new Type();
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45 /** Indicates a single machine instruction was stepped */
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46 public static final Type SINGLE_STEP = new Type();
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47 /** Indicates an unmapped memory address was read from or written
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48 to by the target process */
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49 public static final Type ACCESS_VIOLATION = new Type();
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50 /** Indicates an event of an unknown type occurred in the target
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51 process (catch-all for implementations; but add more event
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52 types) */
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53 public static final Type UNKNOWN = new Type();
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54 }
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55
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56 /** The type of this debug event; BREAKPOINT, SINGLE_STEP, etc. */
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57 public Type getType();
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58
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59 /** Retrieves the ThreadProxy for the thread on which the event
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60 occurred. This is always present. */
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61 public ThreadProxy getThread();
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62
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63 /** For BREAKPOINT, SINGLE_STEP, and ACCESS_VIOLATION events,
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64 returns the program counter at which the event occurred. For
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65 other types of events returns an undefined value. */
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66 public Address getPC();
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67
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68 /** For ACCESS_VIOLATION events, indicates whether the fault
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69 occurred on a write (vs. a read). For other types of events
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70 returns an undefined value. */
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71 public boolean getWasWrite();
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72
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73 /** For ACCESS_VIOLATION events, returns the address at which the
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74 fault occurred. For LOADOBJECT_LOAD and LOADOBJECT_UNLOAD
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75 events, returns the base address of the loadobject in the target
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76 process's address space. For other types of events returns an
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77 undefined value. */
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78 public Address getAddress();
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79
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80 /** For UNKNOWN events, may return a detail message or may return
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81 null. For other types of events returns an undefined value. */
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82 public String getUnknownEventDetail();
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83 }
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