105 lines
3.9 KiB
HTML
Executable File
105 lines
3.9 KiB
HTML
Executable File
---
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layout: site
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---
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<div class="row vspace10">
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<div class="span12">
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<h2 class="center">Compiling Ruby to Binary.</h2>
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<div>
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<p class="center">
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<span>
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Interpreting code is like checking a map at every step: It can really slow you down.
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</span>
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</p>
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</div>
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</div>
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</div>
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<div class="row vspace20">
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<div class="span4">
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<h2 class="center">Goal</h2>
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<p>
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The goal is to execute (not interpret) object oriented code without external dependencies, on modern hardware.
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</p>
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<p>
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This means compiling dynamic code into binary. Using several intermediate representations it
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is possible to keep track of type changes and switch between differently typed, but
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logically equivalent, versions of methods.
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As the system is 100% in ruby, the ultimate goal is to carry on the compilation at run-time,
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ie after the program has started.
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<b>No interpretation.</b>
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</p>
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<p>
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Using the compilation method on it's own runtime (and bootstraping with an exising ruby),
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it is possible to write the whole system in a dynamic oo language (ruby), thus
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<b>removing the two language problem</b> (having to choose between nice and fast)
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</p>
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</div>
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<div class="span4">
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<h2 class="center">Status</h2>
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<p>
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Work is progressing on the ruby compiler. This uses a pure
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<a href="https://github.com/whitequark/parser"> ruby parser</a> to create:
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<ul>
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<li> An Object model of <a href="/typed/parfait.html">classes, types</a>, methods and basic types </li>
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<li> Several strongly typed method versions for every ruby instance method </li>
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</ul>
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</p>
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<p>
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The lower level, strongly typed layer is <a href="/typed/typed.html">finished.</a>.
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While it has well known typed language data semantics, it introduces several new concept:
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<ul>
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<li> Object based memory (no global memory) </li>
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<li> Multiple return addresses based on type </li>
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<li> Multiple implementations per function based on type </li>
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<li> Explicit <a href="/2015/06/20/the-static-call-chain.html">message and frame objects</a>(no stack)</li>
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<li> <a href="https://github.com/salama/salama/tree/master/lib/register" target="_blank">Register machine abstraction</a></li>
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<li> Extensible instruction set, with arm implementations
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</ul>
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</p>
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<p>
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An abstract risc like register level defines some abstraction from the actual hardware. The
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type compiler compiles to this level, but a mapping to Arm is provided to produce <b>working binaries</b>.
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</p>
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<p>
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There is also an interpreter (mostly for testing) and a basic
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<a href="https://github.com/salama/salama-debugger"> visual debugger</a> which not only helps
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debugging, but also understanding of the machine.
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</p>
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</div>
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<div class="span4">
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<h2 class="center">Docs</h2>
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<p>
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The short introduction is under the <a href="/salama/layers.html">architecture</a> menu.
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</p>
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<p>
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The section on the intermediate rerepresentation is <a href="/typed/typed.html">here</a>.
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</p>
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<p>
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The <a href="/project/motivation.html">about</a> section has some info of when and how this
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started. If you feel like contributing <a href="/contribute.html">read this</a> or write a
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<a href="https://groups.google.com/forum/#!forum/salama-dev"> mail </a>.
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</p>
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<h2 class="center">News</h2>
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<p>
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Last but not least, i try to get recent developments down on paper when they are still fresh.
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</p>
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<p>
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