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Make queries traceable again#112883

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oli-obk:tracing_queries
Jun 21, 2023
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Make queries traceable again#112883
bors merged 1 commit intorust-lang:masterfrom
oli-obk:tracing_queries

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@oli-obk oli-obk commented Jun 21, 2023

This can't be tested without something along the lines of #111924 unfortunately.

We could benchmark turning query tracing into an info level tracing statement, but let's get this fix landed first so we can actually debug properly again

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rustbot commented Jun 21, 2023

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @cjgillot (or someone else) soon.

Please see the contribution instructions for more information. Namely, in order to ensure the minimum review times lag, PR authors and assigned reviewers should ensure that the review label (S-waiting-on-review and S-waiting-on-author) stays updated, invoking these commands when appropriate:

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@rustbot rustbot added A-query-system Area: The rustc query system (https://rustc-dev-guide.rust-lang.org/query.html) S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jun 21, 2023
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r=me with one nit.

TBH, I had trouble to use this debug tracing of queries: difficult to filter and drowning in some return values, HIR in particular. How do you use it?

compiler/rustc_query_impl/src/plumbing.rs Outdated
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Could you move this to the call site of call_provider?

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oli-obk commented Jun 21, 2023

difficult to filter and drowning in some return values, HIR in particular. How do you use it?

Yea, return values can be annoying. I mostly log to a file and then just skip over the bad parts 🙃

wrt filtering: I filter queries to specific arguments by filtering on the debug representation of the key: RUSTC_LOG=[typeck{key=\.\*main\.\*}]. Not sure if that is what you mean?

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oli-obk commented Jun 21, 2023

fwiw: I am looking into how to generally work with logs in a more reasonable scheme than "have a log file and grep through it". I want to start dumping json logs and then figure out some UI (possibly just a terminal UI for working with tracing logs specifically) that can actually fold nested calls instead of just indenting them

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oli-obk commented Jun 21, 2023

@bors r=cjgillot

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bors commented Jun 21, 2023

📌 Commit 81e3774 has been approved by cjgillot

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jun 21, 2023
GuillaumeGomez added a commit to GuillaumeGomez/rust that referenced this pull request Jun 21, 2023
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Rollup merge of rust-lang#112883 - oli-obk:tracing_queries, r=cjgillot
9387fe7 
Make queries traceable again

This can't be tested without something along the lines of rust-lang#111924 unfortunately.

We could benchmark turning query tracing into an `info` level tracing statement, but let's get this fix landed first so we can actually debug properly again
This was referenced Jun 21, 2023
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bors added a commit to rust-lang-ci/rust that referenced this pull request Jun 21, 2023
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Auto merge of rust-lang#112890 - GuillaumeGomez:rollup-7e01q69, r=Gui…
536635c 
…llaumeGomez

Rollup of 7 pull requests

Successful merges:

 - rust-lang#99587 (Document memory orderings of `thread::{park, unpark}`)
 - rust-lang#112836 ([rustdoc] partially fix invalid files creation)
 - rust-lang#112853 (Add `lazy_type_alias` feature gate)
 - rust-lang#112863 (Fix copy-paste typo in `eprint(ln)` docs)
 - rust-lang#112883 (Make queries traceable again)
 - rust-lang#112885 (Fix msg passed to span_bug)
 - rust-lang#112886 (Revert 'Rename profile=user to profile=dist')

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 4f6c48b into rust-lang:master Jun 21, 2023
@rustbot rustbot added this to the 1.72.0 milestone Jun 21, 2023
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A-query-system Area: The rustc query system (https://rustc-dev-guide.rust-lang.org/query.html) S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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