public void startScript(StaticScope scope) {
classWriter = new ClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
// Create the class with the appropriate class name and source file
classWriter.visit(
javaVersion == null ? RubyInstanceConfig.JAVA_VERSION : javaVersion,
ACC_PUBLIC + ACC_SUPER,
getClassname(),
null,
p(AbstractScript.class),
null);
// add setPosition impl, which stores filename as constant to speed updates
SkinnyMethodAdapter method =
new SkinnyMethodAdapter(
getClassVisitor(),
ACC_PRIVATE | ACC_STATIC | ACC_SYNTHETIC,
"setPosition",
sig(Void.TYPE, params(ThreadContext.class, int.class)),
null,
null);
method.start();
method.aload(0); // thread context
method.ldc(sourcename);
method.iload(1); // line number
method.invokevirtual(
p(ThreadContext.class), "setFileAndLine", sig(void.class, String.class, int.class));
method.voidreturn();
method.end();
topLevelScope = scope;
beginInit();
cacheCompiler = OptoFactory.newCacheCompiler(this);
// This code was originally used to provide debugging info using JSR-45
// "SMAP" format. However, it breaks using normal Java traces to
// generate Ruby traces, since the original path is lost. Reverting
// to full path for now.
// String sourceNoPath;
// if (sourcename.indexOf("/") >= 0) {
// String[] pathElements = sourcename.split("/");
// sourceNoPath = pathElements[pathElements.length - 1];
// } else if (sourcename.indexOf("\\") >= 0) {
// String[] pathElements = sourcename.split("\\\\");
// sourceNoPath = pathElements[pathElements.length - 1];
// } else {
// sourceNoPath = sourcename;
// }
final File sourceFile = new File(getSourcename());
// Revert to using original sourcename here, so that jitted traces match
// interpreted traces.
classWriter.visitSource(sourcename, sourceFile.getAbsolutePath());
}
private void endClassInit() {
if (clinitMethod != null) {
clinitMethod.voidreturn();
clinitMethod.end();
}
}
private void endInit() {
initMethod.voidreturn();
initMethod.end();
}
public void endScript(boolean generateLoad, boolean generateMain) {
// add Script#run impl, used for running this script with a specified threadcontext and self
// root method of a script is always in __file__ method
String methodName = "__file__";
String loadSig = sig(IRubyObject.class, ThreadContext.class, IRubyObject.class, boolean.class);
if (generateLoad || generateMain) {
// the load method is used for loading as a top-level script, and prepares appropriate scoping
// around the code
SkinnyMethodAdapter method =
new SkinnyMethodAdapter(getClassVisitor(), ACC_PUBLIC, "load", loadSig, null, null);
method.start();
// invoke __file__ with threadcontext, self, args (null), and block (null)
Label tryBegin = new Label();
Label tryFinally = new Label();
method.label(tryBegin);
method.aload(THREADCONTEXT_INDEX);
String scopeNames = Helpers.encodeScope(topLevelScope);
method.ldc(scopeNames);
method.iload(SELF_INDEX + 1);
method.invokestatic(
p(Helpers.class),
"preLoad",
sig(StaticScope.class, ThreadContext.class, String.class, boolean.class));
// store root scope
method.aload(THIS);
method.swap();
method.invokevirtual(
p(AbstractScript.class), "setRootScope", sig(void.class, StaticScope.class));
method.aload(THIS);
method.aload(THREADCONTEXT_INDEX);
method.aload(SELF_INDEX);
method.getstatic(p(IRubyObject.class), "NULL_ARRAY", ci(IRubyObject[].class));
method.getstatic(p(Block.class), "NULL_BLOCK", ci(Block.class));
method.invokestatic(getClassname(), methodName, getStaticMethodSignature(getClassname(), 4));
method.aload(THREADCONTEXT_INDEX);
method.invokestatic(p(Helpers.class), "postLoad", sig(void.class, ThreadContext.class));
method.areturn();
method.label(tryFinally);
method.aload(THREADCONTEXT_INDEX);
method.invokestatic(p(Helpers.class), "postLoad", sig(void.class, ThreadContext.class));
method.athrow();
method.trycatch(tryBegin, tryFinally, tryFinally, null);
method.end();
}
if (generateMain) {
// add main impl, used for detached or command-line execution of this script with a new
// runtime
// root method of a script is always in stub0, method0
SkinnyMethodAdapter method =
new SkinnyMethodAdapter(
getClassVisitor(),
ACC_PUBLIC | ACC_STATIC,
"main",
sig(Void.TYPE, params(String[].class)),
null,
null);
method.start();
// init script filename to simple class name in case we don't assign it (null ClassLoader)
method.ldc(getClassname().replaceAll("\\\\.", "/"));
method.astore(1);
// new instance to invoke run against
method.newobj(getClassname());
method.dup();
method.invokespecial(getClassname(), "<init>", sig(Void.TYPE));
// guard against null classloader
method.ldc(Type.getType("L" + getClassname() + ";"));
method.invokevirtual(p(Class.class), "getClassLoader", sig(ClassLoader.class));
Label skip = new Label();
method.ifnull(skip);
// set filename for the loaded script class (JRUBY-4825)
method.dup();
method.ldc(Type.getType("L" + getClassname() + ";"));
method.invokevirtual(p(Class.class), "getClassLoader", sig(ClassLoader.class));
method.ldc(getClassname() + ".class");
method.invokevirtual(p(ClassLoader.class), "getResource", sig(URL.class, String.class));
method.invokevirtual(p(Object.class), "toString", sig(String.class));
method.astore(1);
method.aload(1);
method.invokevirtual(p(AbstractScript.class), "setFilename", sig(void.class, String.class));
// ifnull ClassLoader
method.label(skip);
// instance config for the script run
method.newobj(p(RubyInstanceConfig.class));
method.dup();
method.invokespecial(p(RubyInstanceConfig.class), "<init>", "()V");
// set argv from main's args
method.dup();
method.aload(0);
method.invokevirtual(p(RubyInstanceConfig.class), "setArgv", sig(void.class, String[].class));
// set script filename ($0)
method.dup();
method.aload(1);
method.invokevirtual(
p(RubyInstanceConfig.class), "setScriptFileName", sig(void.class, String.class));
// invoke run with threadcontext and topself
method.invokestatic(p(Ruby.class), "newInstance", sig(Ruby.class, RubyInstanceConfig.class));
method.dup();
method.invokevirtual(RUBY, "getCurrentContext", sig(ThreadContext.class));
method.swap();
method.invokevirtual(RUBY, "getTopSelf", sig(IRubyObject.class));
method.ldc(false);
method.invokevirtual(getClassname(), "load", loadSig);
method.voidreturn();
method.end();
}
getCacheCompiler().finish();
endInit();
endClassInit();
}