C actually runs very well on the JVM using Java bytecodes as shown by work of
Matthias Grimmer [1]. This includes interoperability with other languages
running on top of the JVM like JavaScript [2]. Current direction of this work
is to extend to LLVM for expanding the support of AOT compiled languages beyond
C. Also, the work includes a safe execution mode that runs C with security
guarantees.
The coroutine [3] and continuation [4] work of Lukas Stadler demonstrates
efficient implementations of those concepts on the JVM as well.
Another major aspect that has changed since 1995 are the advancements in the
area of escape analysis and partial escape analysis to avoid object allocations
[5, 6]. This makes modelling numbers as classes a lot more efficient and indeed
enables the optimization of the calculations into “direct machine instructions”
even when a lot of temporarily boxed objects are involved.
- thomas
[1] http://dl.acm.org/authorize.cfm?key=N96093
http://dl.acm.org/authorize.cfm?key=N96093
[2] http://dl.acm.org/authorize.cfm?key=N96005
http://dl.acm.org/authorize.cfm?key=N96005
[3] http://ssw.jku.at/Research/Papers/Stadler11Master/Stadler11Master.pdf
http://ssw.jku.at/Research/Papers/Stadler11Master/Stadler11Master.pdf
[4] http://ssw.jku.at/Research/Papers/Stadler09/Stadler09a.pdf
http://ssw.jku.at/Research/Papers/Stadler09/Stadler09a.pdf
[5] http://ssw.jku.at/Research/Papers/Stadler14/Stadler2014-CGO-PEA.pdf
http://ssw.jku.at/Research/Papers/Stadler14/Stadler2014-CGO-PEA.pdf
[6] http://ssw.jku.at/Research/Papers/Stadler14PhD/
http://ssw.jku.at/Research/Papers/Stadler14PhD/
On 17 Apr 2015, at 01:19, John Rose john.r.r...@oracle.com wrote:
James made some relevant comments on the JVM as a multi-language engine.
It was just a little while ago, as I noticed going through some old files.
Folks are still working on specialized allocation (aka. value types) and
continuations (aka. coroutines tailcall).
Also, C is no longer right out; see Project Panama.
— John
From: owner-hotjava-interest-dig...@java.sun.com
To: hotjava-interest-dig...@java.sun.com
Subject: hotjava-interest-digest V1 #24
Date: Sat, 1 Apr 1995 17:34:17 -0800
Reply-To: hotjava-inter...@java.sun.com
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hotjava-interest-digest-requ...@java.sun.com
hotjava-interest-digestSunday, 2 April 1995Volume 01 : Number
024
--
From: rich...@cogsci.ed.ac.uk
Date: Fri, 31 Mar 95 13:30:04 BST
Subject: How general is the Java bytecode language?
Has anyone looked at the possibility of compiling languages other than
Java to the Java bytecodes? In particular, there seem to be many people
interested in using Scheme as a scripting language, and the ability
to download Scheme programs into HotJava would be nice.
- -- Richard
--
...
--
From: j...@scndprsn.eng.sun.com (James Gosling)
Date: Fri, 31 Mar 1995 20:34:24 +0800
Subject: Re: How general is the Java bytecode language?
Has anyone looked at the possibility of compiling languages other than
Java to the Java bytecodes? In particular, there seem to be many people
interested in using Scheme as a scripting language, and the ability
to download Scheme programs into HotJava would be nice.
It's reasonably general, although the security restrictions make some
languages hard. C and C++ with general pointer arithmetic are right
out. Fortran's pass-by-reference call semantics and common are
tough. Pascal is pretty straightforward. Scheme is easy or hard,
depending on how good you want the performance to be: the invocation
model in Java is very C like with no provision for continuations.
Continuations can be handled as classes the key trick in a compiler
would be to decide when a full-blown continuation can be optimized
away. The story is similar with datatypes like numbers: in general,
every number would be an instance of some class the trick is to
optimize that into direct machine instructions. Using the Java
bytecodes is likely to be somewhat less than optimal because things
like continuations and general numbers need to be done as classes, the
underlying engine doesn't have things like specialized allocators for
boxed integers.
Note to Sun employees: this is an EXTERNAL mailing list!
Info: send 'help' to hotjava-interest-requ...@java.sun.com
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