| 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. |
