Minimal example for Truffle?

[Chris Seaton]

Sorry, it looks like that FAQ is now a little out of date. You now
need -G:+TraceTruffleCompilation to get it to tell you when it compiles a
method.

You wouldn't normally need to look at the generated machine code, but if
you really need to it's -XX:+UnlockDiagnosticVMOptions
-XX:CompileCommand=print,*::executeHelper.

Chris


On 9 April 2014 18:34, Stefan Fehrenbach <stefan.fehrenbach at gmail.com>wrote:

> Hello Truffle folks,
>
> I am working on a very simple language to get acquainted with
> Truffle. My ultimate goal is to write a JIT-compiled
> parser/grammar interpreter, as I mentioned to Thomas Würthinger
> at SPLASH'13.
>
>
> My question: is there a simple stand-alone example that shows
> Truffle/Graal actually doing "its thing"?
>
>
> In the FAQ it says: "When you run with --vm server, Truffle is
> fairly talkative and will tell you when methods are (Truffle)
> compiled and when they are deoptimized. If it doesn't tell you
> it's compiling anything, then nothing is getting compiled."
>
> When I run my own language [1] it does not print anything.
> When I run the "simple language" with one of the test files, it
> prints something, but nothing like machine code, see below:
>
> /home/stefan/opt/graalvm-jdk1.8.0/bin/java
> -G:+TraceTruffleCompilationDetails -G:TruffleCompilationThreshold=1
> -Didea.launcher.port=7532
> -Didea.launcher.bin.path=/usr/share/intellijidea-ce/bin
> -Dfile.encoding=UTF-8 -classpath
>
> /home/stefan/opt/graalvm-jdk1.8.0/lib/dt.jar:/home/stefan/opt/graalvm-jdk1.8.0/lib/tools.jar:/home/stefan/opt/graalvm-jdk1.8.0/lib/jconsole.jar:/home/stefan/opt/graalvm-jdk1.8.0/lib/sa-jdi.jar:/home/stefan/src/sl/out/production/sl:/home/stefan/src/sl/truffle-0.2.jar:/usr/share/intellijidea-ce/lib/idea_rt.jar
> com.intellij.rt.execution.application.AppMain
> com.oracle.truffle.sl.SLMain /home/stefan/src/sl/LoopCall.sl
> == running on Graal Truffle Runtime
> [truffle] opt queued       root add <split>
>                 |ASTSize      11 (0/0) |C/T          11/    3 |L/T
>      11/   11 |Inval#/Replace#     0/    5
> [truffle] opt start        root add <split>
>                 |ASTSize      11 (0/0) |C/T          30/    3 |L/T
>      32/   11 |Inval#/Replace#     0/    5
> [truffle] opt queued       root add <split>
>                 |ASTSize      11 (0/0) |C/T          11/    3 |L/T
>      11/   11 |Inval#/Replace#     0/    5
> [truffle] opt queued       root loop <split>
>                 |ASTSize      32 (0/0) |C/T           3/    4 |L/T
>    2003/ 2013 |Inval#/Replace#     0/   11
> 1000
>
> Is this all I can expect, and if so, how do I make it compile things
> and show me the results?
> And is there something I need to do to make Truffle print these
> compilation details for my own project or should this just work,
> meaning there is something wrong with my use of Truffle in
> general?
>
>
> Anyways, great work. What I have seen of Truffle so far is very
> promising and great fun to play with. :)
>
> Best,
> Stefan
>
> [1] https://github.com/fehrenbach/tuber-basic
> (This currently has some severe issues with frames and variables, but
> it runs interpreted.)
>