here - Stefan-Marr.de

3.1. VM Support for Concurrent and Parallel Programming
VM Spec. Src. Version
CLI X 5th edition
Dalvik X Android 4.0
DisVM X 4th edition
ECMAScript+HTML5 X X ECMAScript5.1, HTML5
Erlang X Erlang/OTP R15B01
GHC X GHC 7.5.20120411
JVM X X Java SE 7 Edition
Mozart X 1.4.0.20080704
Perl X 5.14.2
Python X 3.2.3
Ruby X 1.9.3
Self X 4.4
Squeak X X 4.3
Table 3.1.: VM survey subjects, their version, and the availability of specification and
source code.
documentation. For example, the CLI’s specification describes the relevant
parts of the standard library and is therefore deemed to be sufficient. For
the JVM however, the analysis includes one of the actual implementations
(HotSpot and OpenJDK 7 ) and its accompanying documentation since the standard
library is not covered by the specification. In the case of ECMAScript and
HTML5, the specification is complemented with an analysis of the implementations
based on V8 8 and SpiderMonkey 9
For languages without specification such as PHP, Python, or Ruby, the analysis
includes only the implementation that is widely regarded to be the official,
i. e., standard implementation, as well as the available documentation.
To answer the survey questions, the analysis assesses whether a concept is
realized with the help of VM support or purely as a library. For VMs where
only the specification was examined, the assessment was deduced from this
information. For VMs where the implementation was inspected, the decision
was simpler. A concept is considered to be realized as a library if its implementation
is written completely in the language provided by the VM. None
of the VM’s primitives, i. e., mechanisms directly provided by the VM are an
essential part of the concept’s implementation. This criterion was unambiguous
in this survey because none of the inspected implementations relied on a
7 http://openjdk.java.net/
8 https://github.com/v8/v8/archive/3.9.24.zip
9 http://ftp.mozilla.org/pub/mozilla.org/firefox/releases/12.0b5/
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