|
2
|
1 |
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
|
|
|
2 |
<html>
|
|
|
3 |
<head>
|
|
30678
|
4 |
<title>Java™ Debug Interface</title>
|
|
2
|
5 |
</head>
|
|
|
6 |
<body>
|
|
30678
|
7 |
The Java™ Debug Interface (JDI) is a high level Java
|
|
21278
|
8 |
API providing information useful for debuggers and similar
|
|
2
|
9 |
systems needing access to the running state of a (usually remote)
|
|
|
10 |
virtual machine.
|
|
|
11 |
<p>
|
|
|
12 |
The JDI provides introspective
|
|
|
13 |
access to a running virtual machine's state, Class, Array,
|
|
|
14 |
Interface, and primitive types, and instances of those
|
|
|
15 |
types.
|
|
|
16 |
<P>
|
|
|
17 |
The JDI also provides explicit control over
|
|
|
18 |
a virtual machine's execution. The ability to suspend
|
|
|
19 |
and resume threads, and to set breakpoints, watchpoints, ...
|
|
|
20 |
Notification
|
|
|
21 |
of exceptions, class loading, thread creation...
|
|
|
22 |
The ability to inspect a suspended thread's state,
|
|
|
23 |
local variables, stack backtrace...
|
|
|
24 |
<p>
|
|
|
25 |
JDI is the highest-layer of the Java Platform Debugger Architecture (JPDA).
|
|
|
26 |
For more information on the Java Platform Debugger Architecture, see the
|
|
|
27 |
<a href="{@docRoot}/../../../../technotes/guides/jpda/index.html">
|
|
|
28 |
Java Platform Debugger Architecture documentation</a>
|
|
|
29 |
for this release and the
|
|
|
30 |
<a href="http://java.sun.com/products/jpda">Java Platform Debugger Architecture website</a>.
|
|
|
31 |
<p>
|
|
|
32 |
<font size="+1"><b>Global Exceptions:</b></font>
|
|
|
33 |
<p>
|
|
|
34 |
This section documents exceptions which apply to the entire API and are thus
|
|
|
35 |
not documented on individual methods.
|
|
|
36 |
|
|
|
37 |
<blockquote>
|
|
|
38 |
<p>
|
|
|
39 |
<b>{@link com.sun.jdi.VMMismatchException}</b>
|
|
|
40 |
<p>
|
|
|
41 |
Any method on a {@link com.sun.jdi.Mirror} that takes a <code>Mirror</code> as an
|
|
|
42 |
parameter directly or indirectly (e.g., as a element in a <code>List</code>) will
|
|
|
43 |
throw {@link com.sun.jdi.VMMismatchException} if the mirrors are from different
|
|
|
44 |
virtual machines.
|
|
|
45 |
<p>
|
|
|
46 |
<b>{@link java.lang.NullPointerException}</b>
|
|
|
47 |
<p>
|
|
|
48 |
Any method which takes a {@link java.lang.Object} as an parameter will throw
|
|
|
49 |
{@link java.lang.NullPointerException} if null is passed directly or indirectly
|
|
|
50 |
-- unless null is explicitly mentioned as a valid parameter.
|
|
|
51 |
</blockquote>
|
|
|
52 |
NOTE: The exceptions below may be thrown whenever the specified
|
|
|
53 |
conditions are met but a guarantee that they are thrown only
|
|
|
54 |
exists when a valid result cannot be returned.
|
|
|
55 |
<blockquote>
|
|
|
56 |
<p>
|
|
|
57 |
<b>{@link com.sun.jdi.VMDisconnectedException}</b>
|
|
|
58 |
<p>
|
|
|
59 |
Any method on {@link com.sun.jdi.ObjectReference}, {@link com.sun.jdi.ReferenceType},
|
|
|
60 |
{@link com.sun.jdi.request.EventRequest}, {@link com.sun.jdi.StackFrame}, or
|
|
|
61 |
{@link com.sun.jdi.VirtualMachine} or which takes one of these directly or indirectly
|
|
|
62 |
as an parameter may throw {@link com.sun.jdi.VMDisconnectedException} if the target VM
|
|
|
63 |
is disconnected and the {@link com.sun.jdi.event.VMDisconnectEvent} has been or is available
|
|
|
64 |
to be read from the {@link com.sun.jdi.event.EventQueue}.
|
|
|
65 |
<p>
|
|
|
66 |
<b>{@link com.sun.jdi.VMOutOfMemoryException}</b>
|
|
|
67 |
<p>
|
|
|
68 |
Any method on {@link com.sun.jdi.ObjectReference}, {@link com.sun.jdi.ReferenceType},
|
|
|
69 |
{@link com.sun.jdi.request.EventRequest}, {@link com.sun.jdi.StackFrame}, or
|
|
|
70 |
{@link com.sun.jdi.VirtualMachine} or which takes one of these directly or indirectly
|
|
|
71 |
as an parameter may throw {@link com.sun.jdi.VMOutOfMemoryException} if the target
|
|
|
72 |
VM has run out of memory.
|
|
|
73 |
<p>
|
|
|
74 |
<b>{@link com.sun.jdi.ObjectCollectedException}</b>
|
|
|
75 |
<p>
|
|
|
76 |
Any method on {@link com.sun.jdi.ObjectReference} or which directly or indirectly takes
|
|
|
77 |
<code>ObjectReference</code> as parameter may throw {@link com.sun.jdi.ObjectCollectedException}
|
|
|
78 |
if the mirrored object has been garbage collected.
|
|
|
79 |
<p>
|
|
|
80 |
Any method on {@link com.sun.jdi.ReferenceType} or which directly or indirectly takes
|
|
|
81 |
<code>ReferenceType</code> as parameter may throw {@link com.sun.jdi.ObjectCollectedException}
|
|
|
82 |
if the mirrored type has been unloaded.
|
|
|
83 |
|
|
|
84 |
</blockquote>
|
|
|
85 |
</body>
|
|
|
86 |
</html>
|