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Small improvements to debug profile
(#12930)
<!-- if this PR closes one or more issues, you can automatically link the PR with them by using one of the [*linking keywords*](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword), e.g. - this PR should close #xxxx - fixes #xxxx you can also mention related issues, PRs or discussions! --> # Description <!-- Thank you for improving Nushell. Please, check our [contributing guide](../CONTRIBUTING.md) and talk to the core team before making major changes. Description of your pull request goes here. **Provide examples and/or screenshots** if your changes affect the user experience. --> 1. With the `-l` flag, `debug profile` now collects files and line numbers of profiled pipeline elements ![profiler_lines](https://github.com/nushell/nushell/assets/25571562/b400a956-d958-4aff-aa4c-7e65da3f78fa) 2. Error from the profiled closure will be reported instead of silently ignored. ![profiler_lines_error](https://github.com/nushell/nushell/assets/25571562/54f7ad7a-06a3-4d56-92c2-c3466917bee8) # User-Facing Changes <!-- List of all changes that impact the user experience here. This helps us keep track of breaking changes. --> New `--lines(-l)` flag to `debug profile`. The command will also fail if the profiled closure fails, so technically it is a breaking change. # Tests + Formatting <!-- Don't forget to add tests that cover your changes. Make sure you've run and fixed any issues with these commands: - `cargo fmt --all -- --check` to check standard code formatting (`cargo fmt --all` applies these changes) - `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used` to check that you're using the standard code style - `cargo test --workspace` to check that all tests pass (on Windows make sure to [enable developer mode](https://learn.microsoft.com/en-us/windows/apps/get-started/developer-mode-features-and-debugging)) - `cargo run -- -c "use toolkit.nu; toolkit test stdlib"` to run the tests for the standard library > **Note** > from `nushell` you can also use the `toolkit` as follows > ```bash > use toolkit.nu # or use an `env_change` hook to activate it automatically > toolkit check pr > ``` --> # After Submitting <!-- If your PR had any user-facing changes, update [the documentation](https://github.com/nushell/nushell.github.io) after the PR is merged, if necessary. This will help us keep the docs up to date. --> --------- Co-authored-by: Ian Manske <ian.manske@pm.me>
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@ -28,6 +28,7 @@ impl Command for DebugProfile {
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Some('v'),
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)
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.switch("expr", "Collect expression types", Some('x'))
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.switch("lines", "Collect line numbers", Some('l'))
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.named(
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"max-depth",
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SyntaxShape::Int,
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@ -90,6 +91,7 @@ confusing the id/parent_id hierarchy. The --expr flag is helpful for investigati
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let collect_expanded_source = call.has_flag(engine_state, stack, "expanded-source")?;
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let collect_values = call.has_flag(engine_state, stack, "values")?;
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let collect_exprs = call.has_flag(engine_state, stack, "expr")?;
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let collect_lines = call.has_flag(engine_state, stack, "lines")?;
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let max_depth = call
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.get_flag(engine_state, stack, "max-depth")?
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.unwrap_or(2);
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@ -101,6 +103,7 @@ confusing the id/parent_id hierarchy. The --expr flag is helpful for investigati
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collect_expanded_source,
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collect_values,
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collect_exprs,
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collect_lines,
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call.span(),
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);
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@ -118,14 +121,11 @@ confusing the id/parent_id hierarchy. The --expr flag is helpful for investigati
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let result = ClosureEvalOnce::new(engine_state, stack, closure).run_with_input(input);
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// TODO: See eval_source()
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match result {
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Ok(pipeline_data) => {
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let _ = pipeline_data.into_value(call.span());
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// pipeline_data.print(engine_state, caller_stack, true, false)
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}
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Err(_e) => (), // TODO: Report error
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}
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// Return potential errors
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let pipeline_data = result?;
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// Collect the output
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let _ = pipeline_data.into_value(call.span());
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Ok(engine_state
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.deactivate_debugger()
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@ -9,6 +9,7 @@ use crate::{
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engine::EngineState,
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record, PipelineData, ShellError, Span, Value,
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};
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use std::io::BufRead;
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use std::time::Instant;
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#[derive(Debug, Clone, Copy)]
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@ -50,11 +51,13 @@ pub struct Profiler {
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collect_expanded_source: bool,
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collect_values: bool,
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collect_exprs: bool,
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collect_lines: bool,
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elements: Vec<ElementInfo>,
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element_stack: Vec<ElementId>,
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}
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impl Profiler {
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#[allow(clippy::too_many_arguments)]
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pub fn new(
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max_depth: i64,
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collect_spans: bool,
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@ -62,6 +65,7 @@ impl Profiler {
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collect_expanded_source: bool,
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collect_values: bool,
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collect_exprs: bool,
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collect_lines: bool,
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span: Span,
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) -> Self {
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let first = ElementInfo {
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@ -82,6 +86,7 @@ impl Profiler {
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collect_expanded_source,
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collect_values,
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collect_exprs,
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collect_lines,
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elements: vec![first],
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element_stack: vec![ElementId(0)],
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}
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@ -262,6 +267,31 @@ fn expr_to_string(engine_state: &EngineState, expr: &Expr) -> String {
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}
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}
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// Find a file name and a line number (indexed from 1) of a span
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fn find_file_of_span(engine_state: &EngineState, span: Span) -> Option<(&str, usize)> {
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for file in engine_state.files() {
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if file.covered_span.contains_span(span) {
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// count the number of lines between file start and the searched span start
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let chunk =
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engine_state.get_span_contents(Span::new(file.covered_span.start, span.start));
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let nlines = chunk.lines().count();
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// account for leading part of current line being counted as a separate line
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let line_num = if chunk.last() == Some(&b'\n') {
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nlines + 1
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} else {
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nlines
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};
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// first line has no previous line, clamp up to `1`
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let line_num = usize::max(line_num, 1);
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return Some((&file.name, line_num));
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}
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}
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None
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}
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fn collect_data(
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engine_state: &EngineState,
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profiler: &Profiler,
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@ -277,6 +307,16 @@ fn collect_data(
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"parent_id" => Value::int(parent_id.0 as i64, profiler_span),
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};
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if profiler.collect_lines {
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if let Some((fname, line_num)) = find_file_of_span(engine_state, element.element_span) {
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row.push("file", Value::string(fname, profiler_span));
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row.push("line_num", Value::int(line_num as i64, profiler_span));
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} else {
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row.push("file", Value::nothing(profiler_span));
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row.push("line", Value::nothing(profiler_span));
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}
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}
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if profiler.collect_spans {
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let span_start = i64::try_from(element.element_span.start)
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.map_err(|_| profiler_error("error converting span start to i64", profiler_span))?;
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