15.1.2 debugging

main
Alpha Chen 2 years ago
parent a5533ea58b
commit 5348c99b00
Signed by: alpha
SSH Key Fingerprint: SHA256:3fOT8fiYQG/aK9ntivV3Bqtg8AYQ7q4nV6ZgihOA20g

300
rust/Cargo.lock generated

@ -3,19 +3,185 @@
version = 3 version = 3
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[[package]] [[package]]
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@ -34,6 +200,27 @@ dependencies = [
"proc-macro2", "proc-macro2",
] ]
[[package]]
name = "rustc-demangle"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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@ -65,8 +252,113 @@ dependencies = [
"syn", "syn",
] ]
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@ -6,5 +6,7 @@ edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies] [dependencies]
anyhow = "1.0.62" color-eyre = "0.6.2"
thiserror = "1.0.32" thiserror = "1.0.32"
tracing = "0.1.37"
tracing-subscriber = "0.3.16"

@ -33,24 +33,41 @@ impl Chunk {
impl fmt::Display for Chunk { impl fmt::Display for Chunk {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let mut last_line: Option<usize> = None; for i in 0..self.code.len() {
writeln!(f, "{}", DisassembledInstruction { i, chunk: self })?;
}
Ok(())
}
}
pub struct DisassembledInstruction<'a> {
i: usize,
chunk: &'a Chunk,
}
impl<'a> DisassembledInstruction<'a> {
pub fn new(i: usize, chunk: &'a Chunk) -> Self {
Self { i, chunk }
}
}
for (i, op_code) in self.code.iter().enumerate() { impl fmt::Display for DisassembledInstruction<'_> {
write!(f, "{:04} ", i)?; fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let line = self.lines[i]; write!(f, "{:04} ", self.i)?;
if last_line == Some(line) { let line = self.chunk.lines[self.i];
if self.i > 0 && line != self.chunk.lines[self.i - 1] {
write!(f, " | ")?; write!(f, " | ")?;
} else { } else {
write!(f, "{:>4} ", line)?; write!(f, "{:>4} ", line)?;
} }
last_line = Some(line); match self.chunk.code[self.i] {
match op_code {
OpCode::Constant(constant) => { OpCode::Constant(constant) => {
let value = self.constants[*constant]; let value = self.chunk.constants[constant];
writeln!(f, "{:<16} {:4} '{}'", "OP_CONSTANT", constant, value)?; write!(f, "{:<16} {:4} '{}'", "OP_CONSTANT", constant, value)?;
} }
OpCode::Return => writeln!(f, "OP_RETURN")?, OpCode::Return => {
write!(f, "OP_RETURN")?;
} }
} }

@ -1,13 +1,21 @@
use chunk::{Chunk, OpCode}; use chunk::{Chunk, OpCode};
use vm::VM; use vm::VM;
use anyhow::Result; use color_eyre::eyre::{Result, WrapErr};
use tracing::Level;
use tracing_subscriber::FmtSubscriber;
mod chunk; mod chunk;
mod value; mod value;
mod vm; mod vm;
fn main() -> Result<()> { fn main() -> Result<()> {
let subscriber = FmtSubscriber::builder()
.with_max_level(Level::DEBUG)
.finish();
tracing::subscriber::set_global_default(subscriber)
.wrap_err("setting default subscriber failed")?;
let mut chunk = Chunk::default(); let mut chunk = Chunk::default();
chunk.push_constant(1.2, 123); chunk.push_constant(1.2, 123);

@ -1,7 +1,8 @@
use anyhow::Result; use color_eyre::eyre::Result;
use thiserror::Error; use thiserror::Error;
use crate::chunk::{Chunk, OpCode}; use crate::chunk::{Chunk, DisassembledInstruction, OpCode};
use tracing::debug;
#[derive(Error, Debug)] #[derive(Error, Debug)]
pub enum InterpretError { pub enum InterpretError {
@ -23,11 +24,13 @@ impl VM {
pub fn interpret(&mut self) -> Result<()> { pub fn interpret(&mut self) -> Result<()> {
loop { loop {
match self.chunk.code[self.ip] { let op_code = &self.chunk.code[self.ip];
debug!("{}", DisassembledInstruction::new(self.ip, &self.chunk,));
match op_code {
OpCode::Constant(constant) => { OpCode::Constant(constant) => {
let value = self.chunk.constants[constant]; let value = self.chunk.constants[*constant];
println!("{}", value); println!("{}", value);
}, }
OpCode::Return => return Ok(()), OpCode::Return => return Ok(()),
} }

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