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Class sun.tools.debug.RemoteDebugger

java.lang.Object
   |
   +----sun.tools.debug.RemoteDebugger

public class RemoteDebugger

extends Object

RemoteDebugger(String, DebuggerCallback, boolean)

Create a remote debugger.

RemoteDebugger(String, String, DebuggerCallback, boolean)

Create a remote debugger, connecting it with a running Java interpreter.

To connect to a running interpreter, it must be started with the "-debug" option, whereupon it will print out the password for that debugging session.

addSystemThread()

Add the calling thread to the list of threads which aren't suspended by the RemoteDebugger.

addSystemThread(Thread)

Add the specified thread to the list of threads which aren't suspended by the RemoteDebugger.

close()

Close the connection to the remote debugging agent.

cont()

Continue an execution that has been suspended.

findClass(String)

Find a specified class.

freeMemory()

Report the free memory available to the Java interpreter being debugged.

gc(RemoteObject[])

Free all objects referenced by the debugger.

get(Integer)

Get an object from the remote object cache.

getExceptionCatchList()

Return the list of the exceptions the debugger will stop on.

getSourcePath()

Return the source file path the Agent is currently using.

itrace(boolean)

Turn on/off instruction tracing.

listBreakpoints()

Return a list of the breakpoints which are currently set.

listClasses()

List the currently known classes.

listThreadGroups(RemoteThreadGroup)

List threadgroups

run(int, String[])

Load and run a runnable Java class, with any optional parameters.

setSourcePath(String)

Specify the list of paths to use when searching for a source file.

totalMemory()

Report the total memory usage of the Java interpreter being debugged.

trace(boolean)

Turn on/off method call tracing.

 public RemoteDebugger(String host,
                       String password,
                       DebuggerCallback client,
                       boolean verbose) throws Exception

Create a remote debugger, connecting it with a running Java interpreter.

To connect to a running interpreter, it must be started with the "-debug" option, whereupon it will print out the password for that debugging session.

Parameters:

host - the name of the system where a debuggable Java instance is running (default is localhost).

password - the password reported by the debuggable Java instance. This should be null when starting a client interpreter.

client - the object to which notification messages are sent (it must support the DebuggerCallback interface)

verbose - turn on internal debugger message text

Throws: Exception

if a general exception occurs.

 public RemoteDebugger(String javaArgs,
                       DebuggerCallback client,
                       boolean verbose) throws Exception

Create a remote debugger.

Parameters:

javaArgs - optional java command-line parameters, such as -classpath

client - the object to which notification messages are sent (it must support the DebuggerCallback interface)

verbose - turn on internal debugger message text

Throws: Exception

if a general exception occurs.

 public void close()

Close the connection to the remote debugging agent.

 public RemoteObject get(Integer id)

Get an object from the remote object cache.

Parameters:

id - the remote object's id

Returns:

the specified RemoteObject, or null if not cached.

 public RemoteClass[] listClasses() throws Exception

List the currently known classes.

Throws: Exception

if a general exception occurs.

 public RemoteClass findClass(String name) throws Exception

Find a specified class. If the class isn't already known by the remote debugger, the lookup request will be passed to the Java interpreter being debugged. NOTE: Substrings, such as "String" for "java.lang.String" will return with the first match, and will not be successfully found if the request is passed to the remote interpreter.

Parameters:

name - the name (or a substring of the name)of the class

Returns:

the specified (Remote)Class, or null if not found.

Throws: Exception

if a general exception occurs.

 public RemoteThreadGroup[] listThreadGroups(RemoteThreadGroup tg) throws Exception

List threadgroups

Parameters:

tg - the threadgroup which hold the groups to be listed, or null for all threadgroups

Throws: Exception

if a general exception occurs.

 public void cont() throws Exception

Continue an execution that has been suspended. Restarts all threads suspended by virtue of having encountered a breakpoint or step.

 public void gc(RemoteObject save_list[]) throws Exception

Free all objects referenced by the debugger. The remote debugger maintains a copy of each object it has examined, so that references won't become invalidated by the garbage collector of the Java interpreter being debugged. The gc() method frees all all of these references, except those specified to save.

Parameters:

save_list - the list of objects to save.

Throws: Exception

if a general exception occurs.

 public void trace(boolean traceOn) throws Exception

Turn on/off method call tracing. When turned on, each method call is reported to the stdout of the Java interpreter being debugged. This output is not captured in any way by the remote debugger.

Parameters:

traceOn - turn tracing on or off

Throws: Exception

if a general exception occurs.

 public void itrace(boolean traceOn) throws Exception

Turn on/off instruction tracing. When turned on, each Java instruction is reported to the stdout of the Java interpreter being debugged. This output is not captured in any way by the remote debugger.

Parameters:

traceOn - turn tracing on or off

Throws: Exception

if a general exception occurs.

 public int totalMemory() throws Exception

Report the total memory usage of the Java interpreter being debugged.

Throws: Exception

if a general exception occurs.

 public int freeMemory() throws Exception

Report the free memory available to the Java interpreter being debugged.

Throws: Exception

if a general exception occurs.

 public RemoteThreadGroup run(int argc,
                              String argv[]) throws Exception

Load and run a runnable Java class, with any optional parameters. The class is started inside a new threadgroup in the Java interpreter being debugged. NOTE: Although it is possible to run multiple runnable classes from the same Java interpreter, there is no guarantee that all applets will work cleanly with each other. For example, two applets may want exclusive access to the same shared resource,such as a specific port.

Parameters:

argc - the number of parameters

argv - the array of parameters: the class to be run is first, followed by any optional parameters used by that class.

Returns:

the new ThreadGroup the class is running in, or null on error

Throws: Exception

if a general exception occurs.

 public String[] listBreakpoints() throws Exception

Return a list of the breakpoints which are currently set.

Returns:

an array of Strings of the form "class_name:line_number".

Throws: Exception

if a general exception occurs.

 public String[] getExceptionCatchList() throws Exception

Return the list of the exceptions the debugger will stop on.

Returns:

an array of exception class names, which may be zero-length.

Throws: Exception

if a general exception occurs.

 public String getSourcePath() throws Exception

Return the source file path the Agent is currently using.

Returns:

a string consisting of a list of colon-delineated paths.

Throws: Exception

if a general exception occurs.

 public void setSourcePath(String pathList) throws Exception

Specify the list of paths to use when searching for a source file.

Parameters:

pathList - a string consisting of a list of colon-delineated paths.

Throws: Exception

if a general exception occurs.

 public void addSystemThread()

Add the calling thread to the list of threads which aren't suspended by the RemoteDebugger. Typically these are only threads used by a debugger client. The thread which created the RemoteDebugger instance is automatically added, as is the AgentIn and other debugger-specific threads.

 public void addSystemThread(Thread t)

Add the specified thread to the list of threads which aren't suspended by the RemoteDebugger. Typically these are only threads used by a debugger client. The thread which created the RemoteDebugger instance is automatically added, as is the AgentIn and other debugger-specific threads.

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