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Disable coverage instrumentation for naked functions #105193

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merged 2 commits into from
Dec 4, 2022

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tmiasko
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@tmiasko tmiasko commented Dec 3, 2022

Fixes #105170.

Use code generation attributes to ensure that naked functions are never
inline, replacing separate checks in MIR inliner and LLVM code
generation.
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rustbot commented Dec 3, 2022

r? @wesleywiser

(rustbot has picked a reviewer for you, use r? to override)

@rustbot rustbot added 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 Dec 3, 2022
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rustbot commented Dec 3, 2022

Some changes occurred to MIR optimizations

cc @rust-lang/wg-mir-opt

@tmiasko tmiasko added A-naked Area: #[naked], prologue and epilogue-free, functions, https://git.io/vAzzS A-code-coverage Area: Source-based code coverage (-Cinstrument-coverage) labels Dec 3, 2022
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Thanks @tmiasko!

@bors r+

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bors commented Dec 3, 2022

📌 Commit b740cdc has been approved by wesleywiser

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 Dec 3, 2022
bors added a commit to rust-lang-ci/rust that referenced this pull request Dec 3, 2022
…iaskrgr

Rollup of 9 pull requests

Successful merges:

 - rust-lang#104199 (Keep track of the start of the argument block of a closure)
 - rust-lang#105050 (Remove useless borrows and derefs)
 - rust-lang#105153 (Create a hacky fail-fast mode that stops tests at the first failure)
 - rust-lang#105164 (Restore `use` suggestion for `dyn` method call requiring `Sized`)
 - rust-lang#105193 (Disable coverage instrumentation for naked functions)
 - rust-lang#105200 (Remove useless filter in unused extern crate check.)
 - rust-lang#105201 (Do not call fn_sig on non-functions.)
 - rust-lang#105208 (Add AmbiguityError for inconsistent resolution for an import)
 - rust-lang#105214 (update Miri)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit ed9a21e into rust-lang:master Dec 4, 2022
@rustbot rustbot added this to the 1.67.0 milestone Dec 4, 2022
@tmiasko tmiasko deleted the naked-nocoverage branch December 4, 2022 18:38
Aaron1011 pushed a commit to Aaron1011/rust that referenced this pull request Jan 6, 2023
…iaskrgr

Rollup of 9 pull requests

Successful merges:

 - rust-lang#104199 (Keep track of the start of the argument block of a closure)
 - rust-lang#105050 (Remove useless borrows and derefs)
 - rust-lang#105153 (Create a hacky fail-fast mode that stops tests at the first failure)
 - rust-lang#105164 (Restore `use` suggestion for `dyn` method call requiring `Sized`)
 - rust-lang#105193 (Disable coverage instrumentation for naked functions)
 - rust-lang#105200 (Remove useless filter in unused extern crate check.)
 - rust-lang#105201 (Do not call fn_sig on non-functions.)
 - rust-lang#105208 (Add AmbiguityError for inconsistent resolution for an import)
 - rust-lang#105214 (update Miri)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
folkertdev added a commit to folkertdev/rust that referenced this pull request Jul 20, 2024
but actually NO_COVERAGE is no longer a thing in the compiler. Sadly,
the link to the issue is broken, so I don't know what the problem was
originally, but I don't think this is relevant any more with the global
asm approach
folkertdev added a commit to folkertdev/rust that referenced this pull request Jul 26, 2024
but actually NO_COVERAGE is no longer a thing in the compiler. Sadly,
the link to the issue is broken, so I don't know what the problem was
originally, but I don't think this is relevant any more with the global
asm approach
folkertdev added a commit to folkertdev/rust that referenced this pull request Jul 27, 2024
but actually NO_COVERAGE is no longer a thing in the compiler. Sadly,
the link to the issue is broken, so I don't know what the problem was
originally, but I don't think this is relevant any more with the global
asm approach
folkertdev added a commit to folkertdev/rust that referenced this pull request Jul 28, 2024
but actually NO_COVERAGE is no longer a thing in the compiler. Sadly,
the link to the issue is broken, so I don't know what the problem was
originally, but I don't think this is relevant any more with the global
asm approach
folkertdev added a commit to folkertdev/rust that referenced this pull request Jul 31, 2024
correctly emit `.hidden`

this test was added in rust-lang#105193

but actually NO_COVERAGE is no longer a thing in the compiler. Sadly,
the link to the issue is broken, so I don't know what the problem was
originally, but I don't think this is relevant any more with the global
asm approach

rename test file

because it now specifically checks for directives only used by
non-macos, non-windows x86_64

add codegen tests for 4 interesting platforms

add codegen test for the `#[instruction_set]` attribute

add test for `#[link_section]`

use `tcx.codegen_fn_attrs` to get attribute info

Fix rust-lang#124375

inline const monomorphization/evaluation

getting rid of FunctionCx

mark naked functions as `InstantiatedMode::GloballyShared`

this makes sure that the function prototype is defined correctly, and we don't see LLVM complaining about a global value with invalid linkage

monomorphize type given to `SymFn`

remove hack that always emits `.globl`

monomorphize type given to `Const`

remove `linkage_directive`

make naked functions always have external linkage

mark naked functions as `#[inline(never)]`

add test file for functional generics/const/impl/trait usage of naked functions
folkertdev added a commit to folkertdev/rust that referenced this pull request Aug 7, 2024
correctly emit `.hidden`

this test was added in rust-lang#105193

but actually NO_COVERAGE is no longer a thing in the compiler. Sadly,
the link to the issue is broken, so I don't know what the problem was
originally, but I don't think this is relevant any more with the global
asm approach

rename test file

because it now specifically checks for directives only used by
non-macos, non-windows x86_64

add codegen tests for 4 interesting platforms

add codegen test for the `#[instruction_set]` attribute

add test for `#[link_section]`

use `tcx.codegen_fn_attrs` to get attribute info

Fix rust-lang#124375

inline const monomorphization/evaluation

getting rid of FunctionCx

mark naked functions as `InstantiatedMode::GloballyShared`

this makes sure that the function prototype is defined correctly, and we don't see LLVM complaining about a global value with invalid linkage

monomorphize type given to `SymFn`

remove hack that always emits `.globl`

monomorphize type given to `Const`

remove `linkage_directive`

make naked functions always have external linkage

mark naked functions as `#[inline(never)]`

add test file for functional generics/const/impl/trait usage of naked functions
folkertdev added a commit to folkertdev/rust that referenced this pull request Aug 11, 2024
correctly emit `.hidden`

this test was added in rust-lang#105193

but actually NO_COVERAGE is no longer a thing in the compiler. Sadly,
the link to the issue is broken, so I don't know what the problem was
originally, but I don't think this is relevant any more with the global
asm approach

rename test file

because it now specifically checks for directives only used by
non-macos, non-windows x86_64

add codegen tests for 4 interesting platforms

add codegen test for the `#[instruction_set]` attribute

add test for `#[link_section]`

use `tcx.codegen_fn_attrs` to get attribute info

Fix rust-lang#124375

inline const monomorphization/evaluation

getting rid of FunctionCx

mark naked functions as `InstantiatedMode::GloballyShared`

this makes sure that the function prototype is defined correctly, and we don't see LLVM complaining about a global value with invalid linkage

monomorphize type given to `SymFn`

remove hack that always emits `.globl`

monomorphize type given to `Const`

remove `linkage_directive`

make naked functions always have external linkage

mark naked functions as `#[inline(never)]`

add test file for functional generics/const/impl/trait usage of naked functions
folkertdev added a commit to folkertdev/rust that referenced this pull request Aug 11, 2024
correctly emit `.hidden`

this test was added in rust-lang#105193

but actually NO_COVERAGE is no longer a thing in the compiler. Sadly,
the link to the issue is broken, so I don't know what the problem was
originally, but I don't think this is relevant any more with the global
asm approach

rename test file

because it now specifically checks for directives only used by
non-macos, non-windows x86_64

add codegen tests for 4 interesting platforms

add codegen test for the `#[instruction_set]` attribute

add test for `#[link_section]`

use `tcx.codegen_fn_attrs` to get attribute info

Fix rust-lang#124375

inline const monomorphization/evaluation

getting rid of FunctionCx

mark naked functions as `InstantiatedMode::GloballyShared`

this makes sure that the function prototype is defined correctly, and we don't see LLVM complaining about a global value with invalid linkage

monomorphize type given to `SymFn`

remove hack that always emits `.globl`

monomorphize type given to `Const`

remove `linkage_directive`

make naked functions always have external linkage

mark naked functions as `#[inline(never)]`

add test file for functional generics/const/impl/trait usage of naked functions
folkertdev added a commit to folkertdev/rust that referenced this pull request Sep 5, 2024
correctly emit `.hidden`

this test was added in rust-lang#105193

but actually NO_COVERAGE is no longer a thing in the compiler. Sadly,
the link to the issue is broken, so I don't know what the problem was
originally, but I don't think this is relevant any more with the global
asm approach

rename test file

because it now specifically checks for directives only used by
non-macos, non-windows x86_64

add codegen tests for 4 interesting platforms

add codegen test for the `#[instruction_set]` attribute

add test for `#[link_section]`

use `tcx.codegen_fn_attrs` to get attribute info

Fix rust-lang#124375

inline const monomorphization/evaluation

getting rid of FunctionCx

mark naked functions as `InstantiatedMode::GloballyShared`

this makes sure that the function prototype is defined correctly, and we don't see LLVM complaining about a global value with invalid linkage

monomorphize type given to `SymFn`

remove hack that always emits `.globl`

monomorphize type given to `Const`

remove `linkage_directive`

make naked functions always have external linkage

mark naked functions as `#[inline(never)]`

add test file for functional generics/const/impl/trait usage of naked functions
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A-code-coverage Area: Source-based code coverage (-Cinstrument-coverage) A-naked Area: #[naked], prologue and epilogue-free, functions, https://git.io/vAzzS 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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4 participants