The ASM library is a project of the OW2 consortium. It provides a simple API for decomposing, modifying, and recomposing binary Java classes (i.e. bytecode). The project was originally conceived and developed by Eric Bruneton. ASM is Java-centric at present, and does not currently have a backend that exposes other bytecode implementations (such as .NET bytecode, Python bytecode, etc.).
The name "ASM" is not an acronym: it is just a reference to the asm keyword of C, which allows some functions to be implemented in assembly language.[1]
ASM provides a simple library that exposes the internal aggregate components of a given Java class through its visitor oriented API. ASM also provides, on top of this visitor API, a tree API that represents classes as object constructs. Both APIs can be used for modifying the binary bytecode, as well as generating new bytecode (via injection of new code into the existing code, or through generation of new classes altogether.) The ASM library has been used in several diverse applications, such as:
Performance and Profiling
Instrumentation calls that capture performance metrics can be injected into Java class binaries to examine memory/coverage data. (For example, injecting instrumentation at entry/exit points.)
Implementation of New Language Semantics
For example, Groovy uses ASM to generate its bytecode. Also, Aspect-Oriented additions to the Java language have been implemented by using ASM to decompose class structures for point-cut identification, and then again when reconstituting the class by injecting aspect-related code back into the binary. (See: AspectWerkz)
Since version 3.2, ASM has added support for the new invokedynamic code, which allows method invocation relying on dynamic type checking on the latest JDK 7 binaries, thus easing support for dynamically typed languages.[2][3]
Release historyedit
This table presents only releases with significant steps in ObjectWeb ASM history, aside from versions that mainly fixed bugs and improved performance.[4]
- The AspectWerkz Project Home Page. (One of the high-visibility projects that makes use of ASM.)
November 26, 2023
objectweb, library, project, consortium, provides, simple, decomposing, modifying, recomposing, binary, java, classes, bytecode, project, originally, conceived, developed, eric, bruneton, java, centric, present, does, currently, have, backend, that, exposes, o. The ASM library is a project of the OW2 consortium It provides a simple API for decomposing modifying and recomposing binary Java classes i e bytecode The project was originally conceived and developed by Eric Bruneton ASM is Java centric at present and does not currently have a backend that exposes other bytecode implementations such as NET bytecode Python bytecode etc ASMOriginal author s Eric BrunetonDeveloper s OW2Initial release2002 21 years ago 2002 Stable release9 3 April 3 2022 19 months ago 2022 04 03 Repositorygitlab wbr ow2 wbr org wbr asm wbr asm wbr gitWritten inJavaOperating systemCross platformTypebytecode Engineering LibraryLicenseBSD LicenseWebsiteasm wbr ow2 wbr ioThe name ASM is not an acronym it is just a reference to the asm keyword of C which allows some functions to be implemented in assembly language 1 Contents 1 Uses 1 1 Invokedynamic 2 Release history 3 See also 4 References 5 External linksUses editASM provides a simple library that exposes the internal aggregate components of a given Java class through its visitor oriented API ASM also provides on top of this visitor API a tree API that represents classes as object constructs Both APIs can be used for modifying the binary bytecode as well as generating new bytecode via injection of new code into the existing code or through generation of new classes altogether The ASM library has been used in several diverse applications such as Performance and Profiling Instrumentation calls that capture performance metrics can be injected into Java class binaries to examine memory coverage data For example injecting instrumentation at entry exit points Implementation of New Language Semantics For example Groovy uses ASM to generate its bytecode Also Aspect Oriented additions to the Java language have been implemented by using ASM to decompose class structures for point cut identification and then again when reconstituting the class by injecting aspect related code back into the binary See AspectWerkz Invokedynamic edit See also Da Vinci Machine Since version 3 2 ASM has added support for the new invokedynamic code which allows method invocation relying on dynamic type checking on the latest JDK 7 binaries thus easing support for dynamically typed languages 2 3 Release history editThis table presents only releases with significant steps in ObjectWeb ASM history aside from versions that mainly fixed bugs and improved performance 4 Release Release Date Highlights2 0 2005 05 17 Java 5 language support3 2 2009 06 11 support for the new invokedynamic code 2 4 0 2011 10 29 Java 7 language support5 0 2014 03 16 Java 8 language support6 0 2017 09 23 Codebase migrated to GitlabJava 9 language support6 1 2018 03 11 Java 10 language support7 0 2018 10 27 Java 11 language support7 1 2019 03 03 Java 13 language support8 0 2020 03 28 Java 14 language support9 0 2020 09 22 Java 16 language support9 1 2021 02 06 Java 17 language support9 2 2021 06 20 Java 18 language support9 3 2022 04 03 Java 19 language support new Maven BOMSee also editByte Code Engineering Library JavassistReferences edit Bruneton Eric Lenglet Romain Coupaye Thierry 2002 ASM a code manipulation tool to implement adaptable systems FranceTelecom R amp D DTL ASR CiteSeerX 10 1 1 117 5769 Retrieved August 23 2023 a b Forax Remi 2009 06 11 ASM now supports invokedynamic Retrieved 2009 11 14 11 June 2009 ASM 3 2 cvs tag ASM 3 2 ObjectWeb 2009 06 11 Retrieved 2009 11 14 Versions ObjectWeb Retrieved 2020 06 06 External links editOfficial website nbsp OW2 Home The OW2 Consortium Home Page AspectWerkz The AspectWerkz Project Home Page One of the high visibility projects that makes use of ASM Bytecode Visualizer free Eclipse plugin for viewing and debugging Java bytecode which makes use of ASM library Retrieved from https en wikipedia org w index php title ObjectWeb ASM amp oldid 1179892456, wikipedia, wiki, book, books, library,
