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|
use crate::ion::IonReader;
use crate::runtime::ByteCode;
macro_rules! print_op {
($iter:expr, $pc:expr, $fmt:literal $(, $vars:expr ),*) => {
let end = $iter.pc();
print!("{:08X} ",$ pc);
let mut len = 0;
for b in &$iter.bytecode()[$pc..end] {
if len > 0 && len % 16 == 0 {
println!(concat!(" ; ", $fmt), $($vars),*);
print!(" ");
}
print!("{:02X} ", b);
len += 1;
}
if len <= 16 {
for _ in len..16 {
print!(" ");
}
print!(concat!(" ; ", $fmt), $($vars),*);
}
println!();
};
}
pub fn print_disassembly(bytecode: &ByteCode) {
let mut iter = ByteCodeIter::new(bytecode);
while let Some(op) = iter.next_byte() {
let pc = iter.pc() - 1;
match op {
0x01 => { // OpType::Jump
let target = iter.next_u32();
print_op!(iter, pc, "JMP {:08X}", target);
println!();
},
0x02 => { // OpType::Dup
print_op!(iter, pc, "DUP");
},
0x03 => { // OpType::Dup2
print_op!(iter, pc, "DUP2");
},
0x04 => { // OpType::SwapPop
print_op!(iter, pc, "SWAPPOP");
},
0x05 => { // OpType::Invoke
let function_id = iter.next_varuint();
print_op!(iter, pc, "CALL {:08X}", function_id);
},
0x09 => { // OpType::InvokeDynamic
print_op!(iter, pc, "INVOKEDYNAMIC");
},
0x06 => { // OpType::InvokeGenerator
let function_id = iter.next_varuint();
print_op!(iter, pc, "GEN {:08X}", function_id);
},
0x07 => { // OpType::Yield
print_op!(iter, pc, "YIELD");
},
0x08 => { // OpType::Return
print_op!(iter, pc, "RET");
println!();
},
0x10 => { // OpType::Push
let buf = &iter.bytecode()[pc+1..];
let mut reader = IonReader::new(buf.iter().copied(), 0);
reader.next_value();
iter.skip(reader.offset());
print_op!(iter, pc, "PUSH");
},
0x11 => { // OpCode::TypePop
print_op!(iter, pc, "POP");
},
0x12 => { // OpCode::TypeLoad
let varid = iter.next_varuint();
print_op!(iter, pc, "LOAD {:02x}", varid);
},
0x13 => { // OpCode::TypeStore
let varid = iter.next_varuint();
print_op!(iter, pc, "STORE {:02x}", varid);
},
0x14 => { // OpCode::TypeLength
let varid = iter.next_varuint();
print_op!(iter, pc, "LEN {:02x}", varid);
},
0x15 => todo!(), // OpCode::BytesAppend
0x16 => todo!(), // OpCode::ListAppend
0x17 => todo!(), // OpCode::ListLoad
0x18 => todo!(), // OpCode::FieldAppend
0x19 => { // OpCode::Iterate
print_op!(iter, pc, "ITER");
},
0x1A => { // OpCode::Next
print_op!(iter, pc, "NEXT");
},
0x1B => { // OpCode::StepIn
print_op!(iter, pc, "STEPIN");
},
0x1C => { // OpCode::StepOut
print_op!(iter, pc, "STEPOUT");
},
0x1D => { // OpCode::LoadValue
print_op!(iter, pc, "VALUE");
},
0x1E => { // OpCode::StructField
print_op!(iter, pc, "FIELD");
},
0x21 => todo!(), // OpCode::IntAdd
0x22 => todo!(), // OpCode::IntSub
0x23 => todo!(), // OpCode::IntMul
0x24 => todo!(), // OpCode::IntDiv
0x41 => todo!(), // OpCode::FloatAdd
0x42 => todo!(), // OpCode::FloatSub
0x43 => todo!(), // OpCode::FloatMul
0x44 => todo!(), // OpCode::FloatDiv
0x51 => todo!(), // OpCode::DecimalAdd
0x52 => todo!(), // OpCode::DecimalSub
0x53 => todo!(), // OpCode::DecimalMul
0x54 => todo!(), // OpCode::DecimalDiv
0x30 => todo!(), // OpCode::IfEq
0x31 => todo!(), // OpCode::IfNe
0x32 => todo!(), // OpCode::IfGe
0x33 => todo!(), // OpCode::IfGt
0x34 => todo!(), // OpCode::IfLe
0x35 => todo!(), // OpCode::IfLt
0x36 => { // OpCode::IfEq2
let next_pc = iter.next_u32();
print_op!(iter, pc, "IFEQ2 {:08X}", next_pc);
},
0x37 => { // OpCode::IfNe2
let next_pc = iter.next_u32();
print_op!(iter, pc, "IFNE2 {:08X}", next_pc);
},
0x38 => { // OpCode::IfGe2
let next_pc = iter.next_u32();
print_op!(iter, pc, "IFGE2 {:08X}", next_pc);
},
0x39 => { // OpCode::IfGt2
let next_pc = iter.next_u32();
print_op!(iter, pc, "IFGT2 {:08X}", next_pc);
},
0x3A => { // OpCode::IfLe2
let next_pc = iter.next_u32();
print_op!(iter, pc, "IFLE2 {:08X}", next_pc);
},
0x3B => { // OpCode::IfLt2
let next_pc = iter.next_u32();
print_op!(iter, pc, "IFLT2 {:08X}", next_pc);
},
0xB1 => { // OpCode::NewList
print_op!(iter, pc, "NEWLIST");
},
0xD1 => { // OpCode::NewStruct
print_op!(iter, pc, "NEWSTRUCT");
},
_ => panic!("Invalid opcode {:02x} at {:02x}", op, pc),
}
}
}
pub struct ByteCodeIter<'a> {
bytecode: &'a ByteCode,
pc: usize,
}
impl <'a> ByteCodeIter<'a> {
pub fn new(bytecode: &'a ByteCode) -> ByteCodeIter<'a> {
ByteCodeIter {
bytecode,
pc: 0,
}
}
pub fn pc(&self) -> usize {
self.pc
}
pub fn bytecode(&self) -> &ByteCode {
self.bytecode
}
pub fn skip(&mut self, amt: usize) {
self.pc += amt;
}
pub fn next_byte(&mut self) -> Option<u8> {
if self.pc < self.bytecode.len() {
let b = self.bytecode[self.pc];
self.pc += 1;
Some(b)
} else {
None
}
}
pub fn next_u32(&mut self) -> u32 {
let mut v: u32 = 0;
for _ in 0..4 {
v <<= 8;
v |= self.next_byte().expect("Truncated bytecode") as u32;
}
v
}
pub fn next_varuint(&mut self) -> usize {
let mut b: usize = self.next_byte().expect("Truncated bytecode").into();
let mut v = b & 0x7f;
while (b & 0x80) == 0 {
b = self.next_byte().expect("Truncated bytecode").into();
v <<= 7;
v |= b & 0x7f;
}
v
}
}
|
