@SuppressWarnings("unchecked")
protected void compile() {
if (bytecode != null) return;
// check if we have a cached compiled version on disk
String codeCache = RubyInstanceConfig.JIT_CODE_CACHE;
File cachedClassFile = new File(codeCache + "/" + className + ".class");
if (codeCache != null && cachedClassFile.exists()) {
FileInputStream fis = null;
try {
if (RubyInstanceConfig.JIT_LOADING_DEBUG)
LOG.info("loading cached code from: " + cachedClassFile);
fis = new FileInputStream(cachedClassFile);
bytecode = new byte[(int) fis.getChannel().size()];
fis.read(bytecode);
name = new ClassReader(bytecode).getClassName();
return;
} catch (Exception e) {
// ignore and proceed to compile
} finally {
try {
fis.close();
} catch (Exception e) {
}
}
}
// Time the compilation
long start = System.nanoTime();
asmCompiler.startScript(staticScope);
final ASTCompiler compiler = ruby.getInstanceConfig().newCompiler();
CompilerCallback args =
new CompilerCallback() {
public void call(BodyCompiler context) {
compiler.compileArgs(argsNode, context, true);
}
};
ASTInspector inspector = new ASTInspector();
if (ruby.getInstanceConfig().isJitDumping()) {
inspector = new ASTInspector(className, true);
}
// check args first, since body inspection can depend on args
inspector.inspect(argsNode);
inspector.inspect(bodyNode);
BodyCompiler methodCompiler;
if (bodyNode != null) {
// we have a body, do a full-on method
methodCompiler = asmCompiler.startFileMethod(args, staticScope, inspector);
compiler.compileBody(bodyNode, methodCompiler, true);
} else {
// If we don't have a body, check for required or opt args
// if opt args, they could have side effects
// if required args, need to raise errors if too few args passed
// otherwise, method does nothing, make it a nop
if (argsNode != null
&& (argsNode.getRequiredArgsCount() > 0 || argsNode.getOptionalArgsCount() > 0)) {
methodCompiler = asmCompiler.startFileMethod(args, staticScope, inspector);
methodCompiler.loadNil();
} else {
methodCompiler = asmCompiler.startFileMethod(null, staticScope, inspector);
methodCompiler.loadNil();
jitCallConfig = CallConfiguration.FrameNoneScopeNone;
}
}
methodCompiler.endBody();
asmCompiler.endScript(false, false);
// if we haven't already decided on a do-nothing call
if (jitCallConfig == null) {
jitCallConfig = inspector.getCallConfig();
}
bytecode = asmCompiler.getClassByteArray();
if (ruby.getInstanceConfig().isJitDumping()) {
TraceClassVisitor tcv = new TraceClassVisitor(new PrintWriter(System.out));
new ClassReader(bytecode).accept(tcv, 0);
}
if (bytecode.length > ruby.getInstanceConfig().getJitMaxSize()) {
bytecode = null;
throw new NotCompilableException(
"JITed method size exceeds configured max of "
+ ruby.getInstanceConfig().getJitMaxSize());
}
if (codeCache != null) {
JITCompiler.saveToCodeCache(ruby, bytecode, packageName, cachedClassFile);
}
counts.compiledCount.incrementAndGet();
counts.compileTime.addAndGet(System.nanoTime() - start);
counts.codeSize.addAndGet(bytecode.length);
counts.averageCompileTime.set(counts.compileTime.get() / counts.compiledCount.get());
counts.averageCodeSize.set(counts.codeSize.get() / counts.compiledCount.get());
synchronized (counts) {
if (counts.largestCodeSize.get() < bytecode.length) {
counts.largestCodeSize.set(bytecode.length);
}
}
}
/**
* Calculates expression value with object as a context for path expressions.
*
* @since 1.1
*/
public Object evaluate(Object o) {
return ASTCompiler.compile(this).evaluateASTChain(o);
}