trufflex86

trufflex86 is an x86_64 interpreter built on top of the GraalVM.

Build Dependencies

gcc for libmemory (high performance memory library) and libemu86 (ptrace based debugging tool)
Linux/x86_64 host with gcc to build the test cases

It is possible to build trufflex86 on any non-Linux/x86_64 host as long as mx and a JDK are available. However, such configurations are not tested. If trufflex86 is built on any host other than Linux/x86_64, the test programs have to be cross-compiled or copied from a Linux/x86_64 host. It might be necessary to change the suite.py in order to do that.

How to get started

Create a new directory, e.g. git which will contain all necessary git repositories:

mkdir git && cd git

Install mx which is used to build trufflex86:

git clone https://github.com/graalvm/mx
export PATH=$PWD/mx:$PATH

Clone the Graal repository as well as this repository:

git clone https://github.com/oracle/graal
git clone https://github.com/oracle/trufflex86

Set JAVA_HOME to a JDK >= 1.8, e.g.:

echo JAVA_HOME=/usr/lib/jvm/java-11-openjdk > trufflex86/mx.trufflex86/env

Build trufflex86:

cd trufflex86 && mx build

Running a program

To run a program, start it with mx vmx86:

mx vmx86 /bin/uname -a

Running on Graal

In order to use Graal as a JIT compiler, first build Graal:

mx --dynamicimport /compiler build

Then:

mx --dynamicimport /compiler --jdk jvmci vmx86 /bin/uname -a

IDE Setup

Generate Eclipse project files:

mx eclipseinit

Generate IntelliJ project files:

mx intellijinit

Execution Traces

First, record an execution trace:

mx -J"-Dvmx86.debug.exec=true -Dvmx86.debug.exec.trace=true -Dvmx86.debug.exec.tracefile=trace-file.trc -Dmem.virtual=true -Dposix.strace=true" vmx86 /bin/echo hello

Then, inspect it in the trace viewer:

mx trcview

Debugging the Interpreter

To check if all CPU instructions are implemented correctly (at least for a given program execution), one can also verify an execution trace on the host CPU (as long as the host has an x86_64 CPU):

mx trchk trace-file.trc

License

oracle/trufflex86

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