Entrypoint call entry methodgit add .

src/stackframe.rs

@@ -2,7 +2,7 @@
 use crate::classfile::{ JavaClassFile, AttributeData };
 
 #[derive(Copy, Clone, Debug)]
-pub enum LocalVariable {
+pub enum Value {
     Boolean(bool),
     Byte(u8),
     Char(u16),
@@ -20,14 +20,14 @@ pub enum LocalVariable {
 
 #[derive(Debug)]
 pub struct OperandStack {
-    stack: Box<[LocalVariable]>,
+    stack: Box<[Value]>,
     depth: u16,
 }
 
 impl OperandStack {
     fn new(size: u16) -> Self {
         return OperandStack {
-            stack: vec![LocalVariable::Empty(); size.into()].into_boxed_slice(),
+            stack: vec![Value::Empty(); size.into()].into_boxed_slice(),
             depth: 0,
         }
     }
@@ -35,25 +35,32 @@ impl OperandStack {
 
 #[derive(Debug)]
 pub struct StackFrame {
-    locals: Box<[LocalVariable]>,
-    operand_stack: OperandStack,
-    class_id: usize,
-    method_index: u16,
-    instruction_pointer: u32,
+    pub locals: Box<[Value]>,
+    pub operand_stack: OperandStack,
+    pub class_index: usize,
+    pub method_index: u16,
+    pub instruction_pointer: u32,
 }
 
 impl StackFrame {
-    pub fn new(classfile: &JavaClassFile, class_id: usize, method_index: u16) -> Self {
+    pub fn new(classfile: &JavaClassFile, class_index: usize, method_index: u16, arguments: &[Value]) -> Self {
         let method_info = &classfile.methods[method_index as usize];
         let code_data = match &method_info.attributes[method_info.code_attribute_index].data {
             AttributeData::Code(data) => data,
             _ => unreachable!(),
         };
+        let mut locals = vec![Value::Empty(); code_data.max_locals.into()].into_boxed_slice();
+
+        assert!(locals.len() >= arguments.len());
+
+        for (index, v) in arguments.iter().enumerate() {
+            locals[index] = *v;
+        }
 
         StackFrame {
-            locals: vec![LocalVariable::Empty(); code_data.max_locals.into()].into_boxed_slice(),
+            locals,
             operand_stack: OperandStack::new(code_data.max_stack),
-            class_id,
+            class_index,
             method_index,
             instruction_pointer: 0,
         }