sander/java.rs
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all cp indices u16

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This commit is contained in:
Sander Hautvast 2023-09-27 22:04:11 +02:00
parent 8dd60c0866
commit 9688b6a0c5
5 changed files with 35 additions and 35 deletions
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26
src/class.rs
View file

@ -11,7 +11,7 @@ use crate::io::read_u16;
pub struct Class {
pub minor_version: u16,
pub major_version: u16,
pub constant_pool: Rc<HashMap<usize, CpEntry>>,
pub constant_pool: Rc<HashMap<u16, CpEntry>>,
pub access_flags: u16,
pub this_class: u16,
pub super_class: u16,
@ -35,10 +35,10 @@ impl Class {
}
pub struct Method {
pub(crate) constant_pool: Rc<HashMap<usize, CpEntry>>,
pub(crate) constant_pool: Rc<HashMap<u16, CpEntry>>,
access_flags: u16,
name_index: usize,
descriptor_index: usize,
name_index: u16,
descriptor_index: u16,
pub(crate) attributes: HashMap<String, AttributeType>,
}
@ -50,10 +50,10 @@ impl fmt::Debug for Method {
}
impl Method {
pub fn new(constant_pool: Rc<HashMap<usize, CpEntry>>,
pub fn new(constant_pool: Rc<HashMap<u16, CpEntry>>,
access_flags: u16,
name_index: usize,
descriptor_index: usize,
name_index: u16,
descriptor_index: u16,
attributes: HashMap<String, AttributeType>, ) -> Self {
Method { constant_pool, access_flags, name_index, descriptor_index, attributes }
}
@ -73,10 +73,10 @@ impl Method {
}
pub struct Field {
constant_pool: Rc<HashMap<usize, CpEntry>>,
constant_pool: Rc<HashMap<u16, CpEntry>>,
access_flags: u16,
name_index: usize,
descriptor_index: usize,
name_index: u16,
descriptor_index: u16,
attributes: HashMap<String, AttributeType>,
}
@ -88,10 +88,10 @@ impl fmt::Debug for Field {
}
impl Field {
pub fn new(constant_pool: Rc<HashMap<usize, CpEntry>>,
pub fn new(constant_pool: Rc<HashMap<u16, CpEntry>>,
access_flags: u16,
name_index: usize,
descriptor_index: usize,
name_index: u16,
descriptor_index: u16,
attributes: HashMap<String, AttributeType>, ) -> Self {
Field { constant_pool, access_flags, name_index, descriptor_index, attributes: attributes }
}

22
src/lib.rs
View file

@ -15,9 +15,9 @@ pub fn get_class(bytecode: Vec<u8>) -> Option<Class> {
let constant_pool_count = read_u16(&bytecode, 8);
// println!("cp count: {}", constant_pool_count);
let mut index = 10;
let mut constant_pool: HashMap<usize, CpEntry> = HashMap::with_capacity(constant_pool_count as usize);
let mut constant_pool: HashMap<u16, CpEntry> = HashMap::with_capacity(constant_pool_count as usize);
let mut cp_index = 1;
while cp_index < constant_pool_count as usize {
while cp_index < constant_pool_count {
// println!("cp#{}", cp_index);
constant_pool.insert(cp_index, read_constant_pool_entry(&mut cp_index, &mut index, &bytecode));
cp_index += 1;
@ -85,7 +85,7 @@ fn check_magic(bytecode: &[u8]) {
}
}
fn read_constant_pool_entry(cp_index: &mut usize, index: &mut usize, bytecode: &[u8]) -> CpEntry {
fn read_constant_pool_entry(cp_index: &mut u16, index: &mut usize, bytecode: &[u8]) -> CpEntry {
let tag = bytecode[*index];
// println!("#{}: {}", cp_index, tag);
match tag {
@ -164,10 +164,10 @@ fn read_constant_pool_entry(cp_index: &mut usize, index: &mut usize, bytecode: &
}
}
fn read_field(constant_pool: Rc<HashMap<usize, CpEntry>>, index: &mut usize, bytecode: &[u8]) -> Field {
fn read_field(constant_pool: Rc<HashMap<u16, CpEntry>>, index: &mut usize, bytecode: &[u8]) -> Field {
let access_flags = read_u16(bytecode, *index);
let name_index = read_u16(bytecode, *index + 2) as usize;
let descriptor_index = read_u16(bytecode, *index + 4) as usize;
let name_index = read_u16(bytecode, *index + 2);
let descriptor_index = read_u16(bytecode, *index + 4);
let attributes_count = read_u16(bytecode, *index + 6);
*index += 8;
let mut attributes = HashMap::new();
@ -187,10 +187,10 @@ fn read_field(constant_pool: Rc<HashMap<usize, CpEntry>>, index: &mut usize, byt
)
}
fn read_method(constant_pool: Rc<HashMap<usize, CpEntry>>, index: &mut usize, bytecode: &[u8]) -> Method {
fn read_method(constant_pool: Rc<HashMap<u16, CpEntry>>, index: &mut usize, bytecode: &[u8]) -> Method {
let access_flags = read_u16(bytecode, *index);
let name_index = read_u16(bytecode, *index + 2) as usize;
let descriptor_index = read_u16(bytecode, *index + 4) as usize;
let name_index = read_u16(bytecode, *index + 2);
let descriptor_index = read_u16(bytecode, *index + 4);
let attributes_count = read_u16(bytecode, *index + 6);
*index += 8;
@ -210,8 +210,8 @@ fn read_method(constant_pool: Rc<HashMap<usize, CpEntry>>, index: &mut usize, by
)
}
fn read_attribute(constant_pool: Rc<HashMap<usize, CpEntry>>, bytecode: &[u8], index: &mut usize) -> Option<(String, AttributeType)> {
let attribute_name_index = read_u16(bytecode, *index) as usize;
fn read_attribute(constant_pool: Rc<HashMap<u16, CpEntry>>, bytecode: &[u8], index: &mut usize) -> Option<(String, AttributeType)> {
let attribute_name_index = read_u16(bytecode, *index);
*index += 2;
let attribute_length = read_u32(bytecode, *index) as usize;
*index += 4;

10
src/main.rs
View file

@ -1,9 +1,9 @@
fn main() {
if let Some(class) = classfile_reader::get_class(classfile_reader::io::read_class_file("./Dummy.class")){
println!("{:?}", class);
let ret = class.execute("public static get()D");
println!("{:?}", ret);
}
// if let Some(class) = classfile_reader::get_class(classfile_reader::io::read_class_file("./Dummy.class")){
// println!("{:?}", class);
// let ret = class.execute("public static get()D");
// println!("{:?}", ret);
// }
}

10
src/vm.rs
View file

@ -39,7 +39,7 @@ impl Vm {
}
pub fn new_instance(&self, class: &Class) {
for f in class.fields {
for f in &class.fields {
println!("{}", f.type_of());
}
// Object::new(Rc::new(class))
@ -60,7 +60,7 @@ impl Vm {
pc += 1;
}
&opcodes::LDC => {
let cp_index = read_u8(&code.opcodes, pc) as usize;
let cp_index = read_u8(&code.opcodes, pc) as u16;
match method.constant_pool.get(&cp_index).unwrap() {
CpEntry::Integer(i) => {
stack.push(Value::I32(*i));
@ -73,7 +73,7 @@ impl Vm {
pc += 1;
}
&opcodes::LDC_W => {
let cp_index = read_u16(&code.opcodes, pc) as usize;
let cp_index = read_u16(&code.opcodes, pc);
match method.constant_pool.get(&cp_index).unwrap() {
CpEntry::Integer(i) => {
stack.push(Value::I32(*i));
@ -86,7 +86,7 @@ impl Vm {
pc += 2;
}
&opcodes::LDC2_W => {
let cp_index = read_u16(&code.opcodes, pc) as usize;
let cp_index = read_u16(&code.opcodes, pc);
match method.constant_pool.get(&cp_index).unwrap() {
CpEntry::Double(d) => {
stack.push(Value::F64(*d));
@ -110,7 +110,7 @@ impl Vm {
return stack.pop();
}
&opcodes::NEW => {
let cp_index = read_u16(&code.opcodes, pc) as usize;
let cp_index = read_u16(&code.opcodes, pc);
if let CpEntry::ClassRef(class_name_index) = method.constant_pool.get(&cp_index).unwrap() {
if let CpEntry::Utf8(class) = method.constant_pool.get(class_name_index).unwrap(){

2
tests/class_tests.rs
View file

@ -30,7 +30,7 @@ mod test {
#[test]
fn get_constant_foat() {
let class = get_class(io::read_class_file("tests/Float.class")).unwrap();
Vm::new().new_instance(class);
Vm::new().new_instance(&class);
// assert_eq!((55, 0), class.get_version());
// if let Value::F32(v) = Vm::new().execute(class.methods.get("public static getF()F").unwrap()).unwrap() {
// assert_eq!(v, 42.0);