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1 The HotSpot Serviceability Agent (SA) is a debugger for hotspot core
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2 dumps and hung processes. There is a read-only JDI (Java Debugger
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3 Interface) implementation on top of SA. This is part of JDK product and
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4 the classes are in $JDK/tools/sa-jdi.jar.
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5
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6 In addition, there are few serviceability tools in $JDK/bin, namely,
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7 jstack (java stack trace tool), jmap (heap tool), jinfo (Java config
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8 tool) and jsadebugd. The classes for these are also in sa-jdi.jar
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9 file. sa-jdi.jar file is built along with hotspot (libjvm.so) on Solaris
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10 and Linux platforms. On Windows platform, SA-JDI is not included and
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11 serviceability tools do not use SA.
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12
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13 Apart from these, HotSpot SA consists of a number of tools that are
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14 *not* included in JDK product bits.
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15
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16 The sources and makefile for all-of-SA (including non-productized stuff)
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17 are under $HOTSPOT_WS/agent directory. The makefile $HOTSPOT/agent/make
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18 directory and shell scripts (and batch files) are used to build and run
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19 SA non-product tools. There is also documentation of SA under
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20 $HOTSPOT/agent/doc directory.
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21
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22 To build complete SA, you need to have Rhino Mozilla jar (js.jar)
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23 version 1.5R5 under $HOTSPOT/agent/src/share/lib directory. Rhino is
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24 JavaScript interpreter written in Java. Rhino is used to implement SA
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25 features such as
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26
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27 * SA command line debugger's JavaScript interface
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28 - refer to $HOTSPOT/agent/doc/clhsdb.html
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29 - refer to $HOTSPOT/agent/doc/jsdb.html
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30 * SA simple object query language (SOQL)
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31 - language to query Java heap.
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32
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33 Rhino's "js.jar" is not included in hotspot source bundles. You need to
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34 download it from http://www.mozilla.org/rhino/download.html.
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35
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36 Without js.jar, $HOTSPOT/agent/make/Makefile will fail to build. But,
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37 note that sa-jdi.jar containing the productized portions of SA will
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38 still be built when you build hotspot JVM.
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