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IPCS (Interactive Problem Control System) is a z/OS component which can analyze unformatted application dumps dumps (SYSMDUMP) or snapshot dumps, or stand-alone system dumps (SADMP). IPCS can inspect any storage address in the dump and format system control blocks, providing labels for fields. It can be run interactively or as a batch job. [2]
System dumps Often known as core dumps, these are platform-specific and contain a raw binary dump of the process memory. This dump has a complete copy of the Java heap, including the contents of all Java objects in the application. OpenJ9 tools are available to process the system dump into a readable format for analysis. Garbage collection data
The core dump feature is a mandatory telemetry feature for the Deep Space segment as it has been proven to minimize system diagnostic costs. [citation needed] The Voyager craft uses routine core dumps to spot memory damage from cosmic ray events. Space Mission core dump systems are mostly based on existing toolkits for the target CPU or subsystem.
The runtime overhead of added instrumentation is small (5–20%) and the bytecode instrumentor itself is very fast (mostly limited by file I/O speed). Memory overhead is a few hundred bytes per Java class. EMMA is 100% pure Java, has no external library dependencies, and works in any Java 2 JVM (even 1.2.x).
The Web Application Security Consortium's Static Code Analysis Tool List; SAMATE-Source Code Security Analyzers; SATE – Static Analysis Tool Exposition "A Comparison of Bug Finding Tools for Java", by Nick Rutar, Christian Almazan, and Jeff Foster, University of Maryland. Compares Bandera, ESC/Java 2, FindBugs, JLint, and PMD.
VisualVM is a visual tool integrating several commandline JDK tools and lightweight profiling capabilities. It is bundled with the Java Development Kit since version 6, update 7. FusionReactor, Java application performance monitoring - low overhead, production grade tools for production debugging, code profiling, memory and thread analysis
jmap Oracle jmap – Memory Map– This utility outputs the memory map for Java and can print shared object memory maps or heap memory details of a given process or core dump. (experimental) jmc – Java Mission Control; jpackage – a tool for generating self-contained application bundles. (experimental)
Jimple is an intermediate representation of a Java program designed to be easier to optimize than Java bytecode. It is typed, has a concrete syntax and is based on three-address code. Jimple includes only 15 different operations, thus simplifying flow analysis. By contrast, java bytecode includes over 200 different operations. [5] [6]