instrument-coverage: try our best to not ICE#77992
Merged
bors merged 1 commit intorust-lang:masterfrom Oct 16, 2020
Merged
Conversation
Contributor
|
r? @varkor (rust_highfive has picked a reviewer for you, use r? to override) |
rust-highfive
added
the
S-waiting-on-review
Member
Author
|
Note: I haven’t added any regression tests because my particular reproducer relies on environment (i.e. rustup toolchain having access to the standard library source code). I'm not too keen to figure out a way to fest this in some other way. |
Member
|
cc @richkadel |
|
Needs fmt I think, but other than that, if the tests still pass, this is probably a good change. Thanks! |
instrument-coverage was ICEing for me on some code, in particular code that had devirtualized paths from standard library. Instrument coverage probably has no bussiness dictating which paths are valid and which aren't so just feed it everything and whatever and let tooling deal with other stuff. For example, with this commit we can generate coverage hitpoints for these interesting paths: * `/rustc/.../library/core/lib.rs` – non-devirtualized path for libcore * `/home/.../src/library/core/lib.rs` – devirtualized version of above * `<inline asm>`, `<anon>` and many similar synthetic paths Even if those paths somehow get to the instrumentation pass, I'd much rather get hits for these weird paths and hope some of them work (as would be the case for devirtualized path to libcore), rather than have compilation fail entirely.
nagisa
force-pushed
the
thaw-coverage-instrumentation
branch
from
922d6de to
8436cfe
Compare
Member
|
r? @wesleywiser @bors r+ rollup Thanks @nagisa! |
Collaborator
|
📌 Commit 8436cfe has been approved by |
bors
added
S-waiting-on-bors
bors
added a commit
to rust-lang-ci/rust
that referenced
this pull request
Oct 16, 2020
Rollup of 10 pull requests Successful merges: - rust-lang#75209 (Suggest imports of unresolved macros) - rust-lang#77547 (stabilize union with 'ManuallyDrop' fields and 'impl Drop for Union') - rust-lang#77827 (Don't link to nightly primitives on stable channel) - rust-lang#77855 (resolve: further improvements to "try using the enum's variant" diagnostic) - rust-lang#77900 (Use fdatasync for File::sync_data on more OSes) - rust-lang#77925 (Suggest minimal subset features in `incomplete_features` lint) - rust-lang#77971 (Deny broken intra-doc links in linkchecker) - rust-lang#77991 (Bump backtrace-rs) - rust-lang#77992 (instrument-coverage: try our best to not ICE) - rust-lang#78013 (Fix sidebar scroll on mobile devices) Failed merges: r? `@ghost`
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
7 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
instrument-coverage was ICEing for me on some code, in particular code
that had devirtualized paths from standard library. Instrument coverage
probably has no bussiness dictating which paths are valid and which
aren't so just feed it everything and whatever and let tooling deal with
other stuff.
For example, with this commit we can generate coverage hitpoints for
these interesting paths:
/rustc/.../library/core/lib.rs– non-devirtualized path for libcore/home/.../src/library/core/lib.rs– devirtualized version of above<inline asm>,<anon>and many similar synthetic pathsEven if those paths somehow get to the instrumentation pass, I'd much
rather get hits for these weird paths and hope some of them work (as
would be the case for devirtualized path to libcore), rather than have
compilation fail entirely.