39 lines
1.8 KiB
Plaintext
39 lines
1.8 KiB
Plaintext
The HotSpot Serviceability Agent (SA) is a debugger for hotspot core
|
|
dumps and hung processes. There is a read-only JDI (Java Debugger
|
|
Interface) implementation on top of SA. This is part of JDK product and
|
|
the classes are in $JDK/tools/sa-jdi.jar.
|
|
|
|
In addition, there are few serviceability tools in $JDK/bin, namely,
|
|
jstack (java stack trace tool), jmap (heap tool), jinfo (Java config
|
|
tool) and jsadebugd. The classes for these are also in sa-jdi.jar
|
|
file. sa-jdi.jar file is built along with hotspot (libjvm.so) on Solaris
|
|
and Linux platforms. On Windows platform, SA-JDI is not included and
|
|
serviceability tools do not use SA.
|
|
|
|
Apart from these, HotSpot SA consists of a number of tools that are
|
|
*not* included in JDK product bits.
|
|
|
|
The sources and makefile for all-of-SA (including non-productized stuff)
|
|
are under $HOTSPOT_WS/agent directory. The makefile $HOTSPOT/agent/make
|
|
directory and shell scripts (and batch files) are used to build and run
|
|
SA non-product tools. There is also documentation of SA under
|
|
$HOTSPOT/agent/doc directory.
|
|
|
|
To build complete SA, you need to have Rhino Mozilla jar (js.jar)
|
|
version 1.5R5 under $HOTSPOT/agent/src/share/lib directory. Rhino is
|
|
JavaScript interpreter written in Java. Rhino is used to implement SA
|
|
features such as
|
|
|
|
* SA command line debugger's JavaScript interface
|
|
- refer to $HOTSPOT/agent/doc/clhsdb.html
|
|
- refer to $HOTSPOT/agent/doc/jsdb.html
|
|
* SA simple object query language (SOQL)
|
|
- language to query Java heap.
|
|
|
|
Rhino's "js.jar" is not included in hotspot source bundles. You need to
|
|
download it from http://www.mozilla.org/rhino/download.html.
|
|
|
|
Without js.jar, $HOTSPOT/agent/make/Makefile will fail to build. But,
|
|
note that sa-jdi.jar containing the productized portions of SA will
|
|
still be built when you build hotspot JVM.
|