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<title>
Using HotSpot Serviceability Agent (SA)
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<h1>Using HotSpot Serviceability Agent (SA)</h1>
<h3>HSDB GUI</h3>
<p>
The top-level GUI program using the HotSpot Serviceability Agent APIs is
called <b>HSDB</b>, the "HotSpot Debugger". To run it, type "hsdbproc.sh"
or "hsdbwindbg.bat" or 64-bit variants (on Unix, Windows platforms
respectively). More info. on HSDB GUI are in <a href="hsdb.html">hsdb.html</a>.
</p>
<h3>SA Modes</h3>
<p>
There are three modes for the SA debugger:
<ul>
<li>attaching to a local process,
<li>opening a core file, and
<li>attaching to a remote "debug server".
</ul>
<p>
The remote case requires two programs to be running on the remote machine:
the rmiregistry (see the script "start-rmiregistry.sh" in this directory;
run this in the background) and the debug server (see the script
"start-debug-server-proc.sh"), in that order. start-rmiregistry.sh takes no
arguments; start-debug-server-proc.sh (or -windbg.bat) takes as argument
the process ID or the executable and core file names to allow remote debugging
of.
</p>
<h3>Command line HSDB</h3>
<p>
There are also command line HSDB variants ("clhsdbproc.sh" or "clhsdbwindbg.bat"
or 64-bit variants). There is also a JavaScript based command line interface
called "jsdbproc.sh" [or "jsdbwindbg.bat" or 64-bit variants]. More details on
command line interfaces can be found in
<ul>
<li><a href="clhsdb.html">clhsdb.html</a>
<li><a href="jsdb.html">jsdb.html</a>
</ul>
</p>
<h3>Other command line tools</h3>
<p>
The following table lists all SA command line tools. <xxx>windbg.bat
files are for Windows. .sh files are for Solaris. <xxx>64.sh are for
64 bit debugees.
</p>
<table border="1">
<tr>
<th>
Tool
</th>
<th>
Description
</th>
</tr>
<tr>
<td>
dumpflagsproc.sh,
dumpflagsproc64.sh,
dumpflagswindbg.bat
dumpflagswindbg64.bat
</td>
<td>
dumps name and value of all -XX JVM command line arguments passed
to debuggee.
</td>
</tr>
<tr>
<td>
<a name="dumpsysprops"></a>
dumpsyspropsproc.sh,
dumpsyspropsproc64.sh,
dumpsyspropswindbg.bat
dumpsyspropswindbg64.bat
</td>
<td>
This prints name and value of Java level System properties.
</td>
</tr>
<tr>
<td>
<a name="heapdump"></a>
heapdumpproc.sh,
heapdumpproc64.sh,
heapdumpwindbg.bat
heapdumpwindbg64.bat
</td>
<td>
Dumps heap in a file in hprof binary format.
</td>
</tr>
<tr>
<td>
<a name="heapsum"></a>
heapsumproc.sh,
heapsumproc64.sh,
heapsumwindbg.bat
heapsumwindbg64.bat
</td>
<td>
Prints summary information on Java heap.
</td>
</tr>
<tr>
<td>
jcoreproc.sh,
jcoreproc64.sh,
jcorewindbg.bat
jcorewindbg64.bat
</td>
<td>
This can retrieve .class files from the debuggee.
set the environment variable <b>JCORE_PACKAGES</b> to comman separated list of
packages whose classes have to be retrieved from the core file.
</td>
</tr>
<tr>
<tr>
<td>
jstackproc.sh,
jstackproc64.sh,
jstackwindbg.bat
jstackwindbg64.bat
</td>
<td>
used to get java stack trace for all java threads.
</td>
</tr>
<tr>
<td>
jhistoproc.sh,
jhistoproc64.sh,
jhistowindbg.bat
jhistowindbg64.bat
</td>
<td>
used to get object histogram of java heap.
</td>
</tr>
<tr>
<td>
permstatproc.sh,
permstatproc64.sh,
permstatwindbg.bat
permstatwindbg64.bat
</td>
<td>
To gather statistics on perm. generation.
</td>
</tr>
<a name="mixed_pstack"></a>
<tr>
<tr>
<td>
pstackproc.sh,
pstackproc64.sh,
pstackwindbg.bat
pstackwindbg64.bat
</td>
<td>
This is cross platform mixed mode pstack utility. This works on any (non-java as well) process, core dump. For java process and core dumps, this prints both java and C/C++ frames.
</td>
</tr>
<tr>
<td>
pmapproc.sh,
pmapproc64.sh,
pmapwindbg.bat
pmapwindbg64.bat
</td>
<td>
This is cross platform Solaris pmap-like utility.
</td>
</tr>
<tr>
<td>
soqlproc.sh,
soqlproc64.sh,
soqlwindbg.bat
soqlwindbg64.bat
</td>
<td>
This is command line SOQL - Simple Object Query Language tool.
SOQL is SQL-like query language to query Java heap.
</td>
<tr>
<td>
start-debug-server-proc.sh,
start-debug-server-proc64.sh,
start-debug-server-windbg.bat,
start-debug-server-windbg64.bat,
start-rmiregistry.bat,
start-rmiregistry64.bat,
start-rmiregistry.sh
start-rmiregistry64.sh
</td>
<td>
These scripts are used to run SA remotely.
</td>
</tr>
</table>
<h3>C2 Compilation Replay</h3>
<p>
When a java process crashes in compiled method, usually a core file is saved.
The C2 replay function can reproduce the compiling process in the core.
<a href="c2replay.html">c2replay.html</a>
<h3>Debugging transported core dumps</h3>
<p>
When a core dump is moved from the machine where it was produced to a
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