Code

AVM2 interpreter#404

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Herschel merged 189 commits intoruffle-rs:masterruffle-rs/ruffle:masterfrom kmeisthax:avm2-interpreterkmeisthax/ruffle:avm2-interpreterCopy head branch name to clipboardJul 20, 2020

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Commits on Jul 13, 2020

• Add an extremely trivial implementation for the AVM2 interpreter state.

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• Add a path to get from the movie clip to the Avm2.

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• Add a very basic object model to the AVM2 interpreter.

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• Add the bare minimum necessary to get opcodes out of an ABC and into an interpreter loop.

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• Always execute any AVM2 code that may have been queued as a result of loading ABC files.

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• Implement pushxyz opcodes for all value types that we currently support.

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• Add support for local registers in the interpreter.

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• Add call method to the object trait. Only functions are callable in AVM2, all others error out.

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• Implement call/return for bare functions

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• Implement namespaces as a value type

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• from_abc_namespace should accept a namespace index and retrieve it from the file's constant pool itself.

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• Implement multinames, sans runtime namespace support.

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• Pull ABC constant pool methods out of Avm2 and into Value.

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• Add exact type assertion methods for strings and namespace values.

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• Implement late binding and runtime qualifications for names.

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• Implement pushnamespace since that's a value type now

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• Add scope support

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• Multiname resolution is another object method.

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• Add support methods in Scope to support opcodes that traverse the scope chain.

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• clippy pls

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• Implement findproperty, findpropstrict, and getlex; which are necessary for interacting with global scope.

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• Implement getproperty, setproperty

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• Implement pushscope, popscope, and pushwith.

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• Implement resolve_multiname, sort of.

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• Replace get_property and set_property with slightly-less-stub impls.

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• Swap out has_property's stub impl.

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• Add global scope which is automatically included on all new activations.

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• Implement closure scope stacks.

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• Unstub proto.

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• Allow constructing a function around a particular class definition.

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• Impl virtual property slots

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• Implement non-slot trait properties (Method, Getter, and Setter)

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• ABC files are always pre-loaded.

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• Always execute the last script when loading an ABC file

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• When running the initial script, also install it's traits onto the global scope.

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• Add stub builtins for Object and Function. These are more-or-less identical to the way we did it in AVM1 (e.g. no fancy player globals file)

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• Implement slots and related opcodes.

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• Impl construct and constructprop.

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• Implement class traits.

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• The public namespace appears to just be an unnamed package namespace, not a regular namespace.

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• Fix invalid script index when loading an ABC file.

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• Add debug for trait installs

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• Implement constant pool default values (index 0).

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• Add specific error messages for unresolvable super classes

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• Add stub impl of flash.display.MovieClip.

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• Classes can fit in slots, so let's stick them in there.

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• Implement slot traits.

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• Implement Function traits.

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• Implement constant slots and traits.

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• Remove scope methods that aren't necessary.

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• Clean up unused variables

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• Implement deleteproperty.

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• Remove define_value from AVM2 objects.

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• Remove dead code in Activation

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• Impl getscopeobject

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• Add flash.display.Sprite because Flash Builder tests demand it.

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• Ensure that this is properly populated into local registers.

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• Propagate arguments into local registers when calling AVM functions.

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• getlex does not support runtime multinames according to spec.

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• Debug all multiname resolutions

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• Impl initproperty

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• Impl dup

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• Impl newfunction and newclass.

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• Impl getglobalscope

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• Impl debug, debugfile and debugline.

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• Impl newobject

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• Fix the error messages for findpropstrict and getlex to be more informative.

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• Clean up the current set of builtins to accurately reflect the namespace hierarchy.

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• Add the entire class hierarchy of MovieClip and Sprite.

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• Impl trace, which is a free function rather than an opcode this time.

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• Fix crash when reading or writing a property that redirects to a slot.

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• Remove unused reference to slot property fields

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• Don't spam the test log with Resolving Multiname messages for each scope that gets checked

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• Upon encountering an Err, dispose of the current AVM2 stack.

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• Impl callmethod, callproperty, callproplex, callpropvoid, and callstatic.

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• Impl coerce_a.

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• Add our first AVM2 regression test: hello world!

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• Args are pushed onto the stack in normal order, so we need to pop them off in reverse order.

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• Add a basic test for function calls.

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• The class function should use the *instance* initializer as it's callable, not the class initializer.

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• construct and constructprop should take their args in reverse-order like the call functions do.

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• construct and constructprop should push the object that was just constructed.

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• Add (currently failing) test for constructors.

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• Impl callsuper, callsupervoid, and constructsuper.

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• Make sure that we actually call the super constructor, not our own constructor.

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• Constructors should also inherit closure scope.

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• Execute static class initializers.

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• Implement prototype awareness for get_property, has_property, and resolve_multiname.

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• Add a test for various types of class methods.

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• resolve_multiname should actually return it's prototype's return value.

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• Refactor the base_proto system to more accurately record what prototype methods come from.

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• Add as3_inheritance test, which is primarily designed to test method calls, constructor execution, and usage of super.

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• Implement getsuper and setsuper.

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• Ensure virtual setters are run when defined on a prototype.

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• Ensure that called setters are properly resolved so that errors in setters propagate up the Rust stack correctly.

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• When resolving get_property, skip over virtual properties that do not have a defined getter.

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• Add test of AVM2 virtual properties.

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• Add a test for stored properties as well.

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• Pass the ABC name and lazy init flag to the AVM2.

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• Implement Object.prototype.hasOwnProperty and resolution of Namespace::Any.

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• ScriptObject now holds a reference to a class and allows retrieving traits from it.

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• Completely overhaul the way traits are defined on objects.

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• Add a test for interactions between prototype and class-trait properties.

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• Allow binding a reciever to a function, and make all method traits bind themselves to the object they were constructed on.

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• Add a test for ES4 method binding of this.

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• Implement is_property_overwritable.

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• Implement jump, iftrue, iffalse, ifstricteq, and ifstrictne.

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• Add tests for control flow instructions that use booleans or strict equality.

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• Sign extend negative s24 values correctly.

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• Implement kill, at least a little.

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• Implement label, which is a no-op designed specifically to silence verifier errors about unreachable code.

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• Remove DontEnum, is_enumerable and attribute mutation. They won't be needed.

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• Impl pop, which is the opposite of dup; and also the opposite of all the push instructions.

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• Properly unwind errors thrown from the AVM2 reader.

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• Implement hasnext, hasnext2, nextname, nextvalue, and the underlying enumeration machinery that powers it.

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• Add as3_object_enumeration and as3_class_enumeration tests.

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• Impl Object.isPrototypeOf w/ test

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• Free functions always have a prototype, this is a holdover from ES3.

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• Allow tracing booleans.

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• Actually enable the isPrototypeOf test.

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• Fix any name resolution, at least enough for the has_own_property test to work.

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• Add a test for has_own_property in various class instance scenarios.

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• callproperty and callpropvoid should *never* get callables from base_proto.

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• Prevent instance traits from being accessible directly from prototypes.

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• Impl propertyIsEnumerable

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• Add a test for propertyIsEnumerable.

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• Implement setPropertyIsEnumerable

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• Add test for setPropertyIsEnumerable

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• Make toString and valueOf methods of TObject, called to_string and value_of respectively.

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• Add tests for toString on objects, functions, and classes.

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• Several built-in functions are not public, but instead live in the AS3 namespace. This moves those functions there.

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• ES4 classes, while superficially similar to functions, are not functions and should not inherit from the Function prototype.

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• Add a test for legacy / ES3 inheritance.

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• Add test of Function.prototype.call

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• Implement and test toLocaleString.

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• Since we have an es3_inheritance test now, rename the existing inheritance test to es4_inheritance.

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• Implement strictequals.

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• Add tests for valueOf.

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• Add global constants undefined, null, and NaN.

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• *Correctly* implement ifstricteq and ifstrictne.

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• NaN is not special-cased in AS3.

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• Add tests for ifstricteq, ifstrictne, and strictequals.

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• Silence this warning about occupied slots being an unused variant.

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• chore: Clippy conformance

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• Excise ReturnValue<'gc> from all TObject methods.

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• Add an internal representation of Trait, separate from swf::avm2::types::Trait, which is specific to the ABC file format.

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• Decouple the entire trait machinery from ABC-provided traits.

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• Wrap ABC loading inside of a TranslationUnit.

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• Fix compilation bugs involved with automatic script initializer execution.

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• Remove Avm2ScriptEntry. It is now obsolete and unused.

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• Make TranslationUnit a GC-mandatory type (only referred to by GcCell).

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• Make Avm2MethodEntry hold it's TranslationUnit rather than an AbcFile.

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• Fix remaining problems with method loading using callstatic

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• table_class should resolve Classes straight from the current translation unit.

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• Resolve all remaining compilation issues with this refactor.

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• Resolve multiname constant zero as an error rather than a panic.

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• Clippy compliance for the last batch of commits.

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• Remove Avm2ClassEntry. It is no longer used.

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• Refactor method-related structs into a separate method module.

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• Remove Avm2Function as it is no longer used.

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• Invert the role of Avm2 and it's Activation, similar to what was done with Avm1 and it's Activation.

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• Wrap BytecodeMethod (and the bytecode half of Executable) in a Gc.

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• Allow methods to not hold a body.

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• Allow the construction of classes with no base class.

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• Add a test for loading interfaces into the AVM2.

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• Add trait methods for getting and setting the interfaces list.

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• Read the interface list when instantiating classes, resolve them, and stick them in the prototype for later use.

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• Add is_instance_of trait method to TObject

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• Implement istype, istypelate, and instanceof.

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• Instances should be listed as their prototypes (empty as they are)

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• Add tests for instanceof and is operators.

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• Allow borrowing string values from an ABC file instead of cloning everything.

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• coerce_string may return a static string, which we shouldn't clone.

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• Don't attempt to log debugging information if we're not in a debug build.

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• pool_string should return a Ref<str> just like value::abc_string.

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Commits on Jul 14, 2020

• Impl Copy, Eq, PartialOrd, Ord, and Hash for AvmString.

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• Replace String or &str references with AvmString everywhere in the AVM2 runtime.

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• Remove abc_string and replace it with abc_string_copy. All code that pulls strings from the ABC file now uses AvmStrings.

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• Add support for cached/interned pool strings in the TranslationUnit.

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Commits on Jul 15, 2020

• Run all string constant retrieval through the TranslationUnit, preventing us from making multiple copies of the same string.

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• Remove any remaining uses of abc_ref.

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Commits on Jul 18, 2020

• Remove dead code on all now-in-use structs and methods.

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• Add a stub AVM2 string representation to allow for both VMs' strings to diverge.

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  37b6b89

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• Add AVM2 equivalent of PropertyMap for further expansion.

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• Zero-index multinames should generate a validation error in QName::from_abc_multiname.

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• Rename a2me to entry (or method in one case where it lets me simplify a struct declaration)

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• Use FnvHashMap for the translation unit pools.

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• Script should not hold write locks when probing it's internal caches.

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• Use unwrap_or_default

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