sander/java.rs
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putfield sets the value in the object,

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using Rc<RefCell>. Not really happy, but it works
This commit is contained in:
Sander Hautvast 2023-10-01 19:05:34 +02:00
parent 9a53f1785d
commit b9d0a199a3
3 changed files with 44 additions and 33 deletions
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3
src/class.rs
View file

@ -1,3 +1,4 @@
use std::cell::RefCell;
use crate::classloader::CpEntry;
use crate::heap::Object;
use anyhow::{anyhow, Error};
@ -263,7 +264,7 @@ pub enum Value {
F64(f64),
BOOL(bool),
CHAR(char),
Ref(Rc<Object>),
Ref(Rc<RefCell<Object>>),
}
unsafe impl Send for Value {}

9
src/heap.rs
View file

@ -1,3 +1,4 @@
use std::cell::RefCell;
use crate::class::{Class, Value};
use std::collections::HashMap;
use std::fmt;
@ -8,7 +9,7 @@ pub struct Object {
// locked: bool,
// hashcode: i32,
pub class: Rc<Class>,
pub data: HashMap<u16, Rc<Value>>, //TODO optimize
pub data: HashMap<u16, Rc<RefCell<Value>>>, //TODO optimize
}
unsafe impl Send for Object {}
@ -16,7 +17,7 @@ unsafe impl Send for Object {}
unsafe impl Sync for Object {}
impl Object {
pub fn new(class: Rc<Class>, data: HashMap<u16, Rc<Value>>) -> Self {
pub fn new(class: Rc<Class>, data: HashMap<u16, Rc<RefCell<Value>>>) -> Self {
Self { class, data }
}
@ -46,7 +47,7 @@ impl fmt::Debug for Object {
}
pub(crate) struct Heap {
objects: Vec<Rc<Object>>,
objects: Vec<Rc<RefCell<Object>>>,
}
impl Heap {
@ -54,7 +55,7 @@ impl Heap {
Self { objects: vec![] }
}
pub(crate) fn new_object(&mut self, object: Rc<Object>) {
pub(crate) fn new_object(&mut self, object: Rc<RefCell<Object>>) {
self.objects.push(object);
}
}

65
src/vm.rs
View file

@ -1,4 +1,6 @@
use std::cell::RefCell;
use std::collections::HashMap;
use std::ops::{Deref, DerefMut};
use std::rc::Rc;
use anyhow::{anyhow, Error};
@ -13,7 +15,7 @@ use crate::opcodes::*;
#[derive(Debug)]
struct StackFrame {
at: String,
data: Vec<Rc<Value>>,
data: Vec<Rc<RefCell<Value>>>,
}
impl StackFrame {
@ -24,11 +26,11 @@ impl StackFrame {
Self { at, data: vec![] }
}
fn push(&mut self, val: Rc<Value>) {
fn push(&mut self, val: Rc<RefCell<Value>>) {
self.data.push(val);
}
fn pop(&mut self) -> Result<Rc<Value>, Error> {
fn pop(&mut self) -> Result<Rc<RefCell<Value>>, Error> {
Ok(self.data.pop().unwrap())
}
}
@ -90,7 +92,7 @@ impl Vm {
"L" => Value::Null,
_ => Value::Void,
};
data.insert(f.name_index, Rc::new(value));
data.insert(f.name_index, Rc::new(RefCell::new(value)));
}
Object::new(class.clone(), data)
}
@ -100,8 +102,8 @@ impl Vm {
&mut self,
class_name: &str,
method_name: &str,
args: Vec<Rc<Value>>,
) -> Result<Rc<Value>, Error> {
args: Vec<Rc<RefCell<Value>>>,
) -> Result<Rc<RefCell<Value>>, Error> {
println!("execute {}.{}", class_name, method_name);
let class = self.get_class(class_name)?;
let method = class.get_method(method_name)?;
@ -118,7 +120,7 @@ impl Vm {
BIPUSH => {
println!("BISPUSH");
let c = code.opcodes[pc] as i32;
self.local_stack().push(Rc::new(Value::I32(c)));
self.local_stack().push(Rc::new(RefCell::new(Value::I32(c))));
pc += 1;
}
LDC => {
@ -126,10 +128,10 @@ impl Vm {
let cp_index = read_u8(&code.opcodes, pc) as u16;
match method.constant_pool.get(&cp_index).unwrap() {
CpEntry::Integer(i) => {
self.local_stack().push(Rc::new(Value::I32(*i)));
self.local_stack().push(Rc::new(RefCell::new(Value::I32(*i))));
}
CpEntry::Float(f) => {
self.local_stack().push(Rc::new(Value::F32(*f)));
self.local_stack().push(Rc::new(RefCell::new(Value::F32(*f))));
}
_ => {}
}
@ -139,10 +141,10 @@ impl Vm {
let cp_index = read_u16(&code.opcodes, pc);
match method.constant_pool.get(&cp_index).unwrap() {
CpEntry::Integer(i) => {
self.local_stack().push(Rc::new(Value::I32(*i)));
self.local_stack().push(Rc::new(RefCell::new(Value::I32(*i))));
}
CpEntry::Float(f) => {
self.local_stack().push(Rc::new(Value::F32(*f)));
self.local_stack().push(Rc::new(RefCell::new(Value::F32(*f))));
}
_ => {
panic!("unexpected")
@ -154,10 +156,10 @@ impl Vm {
let cp_index = read_u16(&code.opcodes, pc);
match method.constant_pool.get(&cp_index).unwrap() {
CpEntry::Double(d) => {
self.local_stack().push(Rc::new(Value::F64(*d)));
self.local_stack().push(Rc::new(RefCell::new(Value::F64(*d))));
}
CpEntry::Long(l) => {
self.local_stack().push(Rc::new(Value::I64(*l)));
self.local_stack().push(Rc::new(RefCell::new(Value::I64(*l))));
}
_ => {
panic!("unexpected")
@ -220,7 +222,7 @@ impl Vm {
RETURN_VOID => {
println!("return");
self.stack.pop();
return Ok(Rc::new(Void));
return Ok(Rc::new(RefCell::new(Void)));
}
GETFIELD => {
println!("GETFIELD");
@ -228,14 +230,14 @@ impl Vm {
if let CpEntry::Fieldref(_class_index, name_and_type_index) =
method.constant_pool.get(&cp_index).unwrap()
{
if let Value::Ref(inst) = &*self.local_stack().pop()? {
if let Value::Ref(instance) = self.local_stack().pop()?.borrow().deref() {
//TODO smell?
if let CpEntry::NameAndType(name, _) =
method.constant_pool.get(name_and_type_index).unwrap()
{
let value = inst.data.get(name).unwrap();
println!("{:?}", value);
self.local_stack().push(value.clone());
let borrow = instance.borrow();
let value = borrow.data.get(name).unwrap();
self.local_stack().push(Rc::clone(value));
}
}
}
@ -247,10 +249,15 @@ impl Vm {
if let CpEntry::Fieldref(_class_index, name_and_type_index) =
method.constant_pool.get(&cp_index).unwrap()
{
let value = self.local_stack().pop()?;
println!("value {:?}", value);
let objectref = self.local_stack().pop()?;
println!("objectref {:?}", objectref);
if let CpEntry::NameAndType(name_index, _) = method.constant_pool.get(name_and_type_index).unwrap() {
let value = self.local_stack().pop()?;
let objectref = self.local_stack().pop()?;
let mut b = objectref.borrow_mut();
let b = b.deref_mut();
if let Value::Ref(object) = b {
object.borrow_mut().data.insert(*name_index, value);
}
}
}
pc += 2;
}
@ -265,8 +272,9 @@ impl Vm {
}
args.insert(0, self.local_stack().pop()?);
let return_value = self.execute(class.as_str(), signature, args)?;
if let Void = *return_value {} else { // not let?
self.local_stack().push(return_value);
let borrow = return_value.borrow();
if let &Void = borrow.deref() {
self.local_stack().push(return_value.clone());
}
}
@ -284,8 +292,9 @@ impl Vm {
}
args.insert(0, self.local_stack().pop()?);
let return_value = self.execute(class.as_str(), signature, args)?;
if let Void = *return_value {} else { // not let?
self.local_stack().push(return_value);
let borrow = return_value.borrow();
if let &Void = borrow.deref() {
self.local_stack().push(return_value.clone());
}
}
@ -302,8 +311,8 @@ impl Vm {
{
println!("new {}", new_class);
let class = self.get_class(new_class)?;
let object = Rc::new(self.new_instance(class));
self.local_stack().push(Rc::new(Value::Ref(object.clone())));
let object = Rc::new(RefCell::new(self.new_instance(class)));
self.local_stack().push(Rc::new(RefCell::new(Value::Ref(Rc::clone(&object)))));
self.heap.new_object(object);
}
}