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Signed-off-by: onur-ozkan <work@onurozkan.dev>
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It is subsumed by `-Clinker-flavor=*-lld-cc -Clink-self-contained=+linker` options now
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otherwise bootstrap will fail to link the stdlib on a target using the
self-contained linker: rust-lld will not be found since it's currently
not in the stage0-sysroot.
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usage of forever unstable things
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Do not rename and resign the darwin sanitizers a second time for
macabi.
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The -macabi targets are iOS running on MacOS, and they use the runtime
libraries for MacOS, thus they have the same sanitizers available as the
*-apple-darwin targets.
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Overall optimizations for bootstrap on conditions, assertions,
trait implementations, etc.
Signed-off-by: onur-ozkan <work@onurozkan.dev>
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Rollup of 5 pull requests
Successful merges:
- #94667 (Add `Iterator::map_windows`)
- #114069 (Allow using external builds of the compiler-rt profile lib)
- #114354 (coverage: Store BCB counter info externally, not directly in the BCB graph)
- #114625 (CI: use smaller machines in PR runs)
- #114777 (Migrate GUI colors test to original CSS color format)
r? `@ghost`
`@rustbot` modify labels: rollup
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Allow using external builds of the compiler-rt profile lib
This changes the bootstrap config `target.*.profiler` from a plain bool
to also allow a string, which will be used as a path to the pre-built
profiling runtime for that target. Then `profiler_builtins/build.rs`
reads that in a `LLVM_PROFILER_RT_LIB` environment variable.
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copy the correct version of LLVM into the stage0 sysroot
In some cases(see https://github.com/rust-lang/rust/issues/109314), when the stage0
compiler relies on more recent version of LLVM than the beta compiler, it may not
be able to locate the correct LLVM in the sysroot. This situation typically occurs
when we upgrade LLVM version while the beta compiler continues to use an older version.
Fixes #109314
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better error handling for `rust.codegen-backends` on deserialization
Fixes #109315
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In some cases(see https://github.com/rust-lang/rust/issues/109314), when the stage0
compiler relies on more recent version of LLVM than the beta compiler, it may not
be able to locate the correct LLVM in the sysroot. This situation typically occurs
when we upgrade LLVM version while the beta compiler continues to use an older version.
Signed-off-by: ozkanonur <work@onurozkan.dev>
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Strip unexpected debuginfo from `libLLVM.so` and `librustc_driver.so` when not requesting any debuginfo
As seen in #114175 and in [this zulip discussion](https://rust-lang.zulipchat.com/#narrow/stream/247081-t-compiler.2Fperformance/topic/Artifact.20sizes/near/379302655), there's still some small amount of debuginfo in LLVM's shared library on linux, even when not requesting it (nightly CI), coming from `libstdc++`.
```
$ readelf --debug-dump=info ~/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/libLLVM-16-rust-1.73.0-nightly.so | grep DW_TAG_compile_unit -A5 | grep DW_AT_comp_dir | cut -d ":" -f 2- | counts
101 counts
( 1) 39 (38.6%, 38.6%): (indirect string, offset: 0x7): /tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/libsupc++
( 2) 38 (37.6%, 76.2%): (indirect string, offset: 0x43fb2): /tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/src/c++11
( 3) 23 (22.8%, 99.0%): (indirect string, offset: 0x18ed8): /tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/src/c++98
( 4) 1 ( 1.0%,100.0%): (indirect string, offset: 0x53f04): /tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/src
```
Similarly, here's `librustc_driver.so` when not requesting debuginfo from either rustc or the tools (nightly CI), coming e.g. from our LLVM wrapper:
```
$ readelf --debug-dump=info ~/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/librustc_driver-e534b3a316089f5f.so | grep DW_TAG_compile_unit -A5 | grep DW_AT_comp_dir | cut -d ":" -f 2- | counts
116 counts
( 1) 34 (29.3%, 29.3%): (indirect string, offset: 0x3c11): /tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/libsupc++
( 2) 32 (27.6%, 56.9%): (indirect string, offset: 0x9753c): /tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/src/c++11
( 3) 25 (21.6%, 78.4%): (indirect string, offset: 0x393bd): /tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/src/c++98
( 4) 23 (19.8%, 98.3%): (indirect string, offset: 0x33ed3): /cargo/registry/src/index.crates.io-6f17d22bba15001f/compiler_builtins-0.1.98
( 5) 1 ( 0.9%, 99.1%): (indirect string, offset: 0xaffff): /rustc/0d95f9132909ae7c5f2456748d0ffd1c3ba4a8e8
( 6) 1 ( 0.9%,100.0%): (indirect string, offset: 0xb604a): /tmp/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/src
```
To reduce the size of distributed artifacts, this PR strips debuginfo from the LLVM and `rustc_driver` shared libraries, when:
- no debuginfo is requested when building LLVM: `link-shared` is true, `optimize` is true and `release-debuginfo` is false
- no debuginfo is requested when building the rustc driver:
- `debuginfo-level-rustc` and `debuginfo-level-tools` are off.
- when building with a stage != 0 compiler: since this is about the distributed artifacts, there's no need to do this at other stages.
- for both: on a x64 linux host and target where `strip -g` is available and fixes the issue (I don't know how to strip debuginfo from a `.dylib` on mac). The LLVM BOLTed .so, and `librustc_driver.so` are big there, and this will help a little. Other targets/hosts can be added in the future if we want to.
#114175 did the same thing unconditionally in `opt-dist`, prior to BOLTing LLVM. But this should only be used in conjunction with the other config options mentioned above, and which `opt-dist` doesn't know about. Therefore, it makes more sense as in bootstrap when building LLVM and rustc when applicable and no debuginfo is requested.
This shouldn't interact badly with CI caching builds and artifacts, right?
---
From the other PR, `libLLVM-16-rust-1.73.0-nightly.so` prior to #114141:
- master: 173.13 MiB
- stripped debuginfo: 165.12 MiB (-8 MiB, -4.6%)
`libLLVM-16-rust-1.73.0-nightly.so` after #114141:
- master: 121.13 MiB
- stripped debuginfo: 113.12 MiB (still -8 MiB, -6.6%)
`librustc_driver.so`:
- master: 118.58 MiB
- stripped debuginfo: 106.46 MiB (-12 MiB, -10.2%)
(Results are also available in this most recent [perf run's artifact sizes](https://perf.rust-lang.org/compare.html?start=b321edd1b2d4bd00c7b4611e8f20a03ee7b77023&end=810ab570d5d27facb91806e5d9847815d9dac22a&stat=instructions%3Au&tab=artifact-size))
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WASI threads, implementation of wasm32-wasi-preview1-threads target
This PR adds a target proposed in https://github.com/rust-lang/compiler-team/issues/574 by `@abrown` and implementation of `std::thread::spawn` for the target `wasm32-wasi-preview1-threads`
### Tier 3 Target Policy
As tier 3 targets, the new targets are required to adhere to [the tier 3 target policy](https://doc.rust-lang.org/nightly/rustc/target-tier-policy.html#tier-3-target-policy) requirements. This section quotes each requirement in entirety and describes how they are met.
> - A tier 3 target must have a designated developer or developers (the "target maintainers") on record to be CCed when issues arise regarding the target. (The mechanism to track and CC such developers may evolve over time.)
See [src/doc/rustc/src/platform-support/wasm32-wasi-preview1-threads.md](https://github.com/rust-lang/rust/pull/112922/files#diff-a48ee9d94f13e12be24eadd08eb47b479c153c340eeea4ef22276d876dfd4f3e).
> - Targets must use naming consistent with any existing targets; for instance, a target for the same CPU or OS as an existing Rust target should use the same name for that CPU or OS. Targets should normally use the same names and naming conventions as used elsewhere in the broader ecosystem beyond Rust (such as in other toolchains), unless they have a very good reason to diverge. Changing the name of a target can be highly disruptive, especially once the target reaches a higher tier, so getting the name right is important even for a tier 3 target.
> - Target names should not introduce undue confusion or ambiguity unless absolutely necessary to maintain ecosystem compatibility. For example, if the name of the target makes people extremely likely to form incorrect beliefs about what it targets, the name should be changed or augmented to disambiguate it.
If possible, use only letters, numbers, dashes and underscores for the name. Periods (.) are known to cause issues in Cargo.
The target is using the same name for $ARCH=wasm32 and $OS=wasi as existing Rust targets. The suffix `preview1` introduced to accurately set expectations because eventually this target will be deprecated and follows [MCP 607](https://github.com/rust-lang/compiler-team/issues/607). The suffix `threads` indicates that it’s an extension that enables threads to the existing target and it follows [MCP 574](https://github.com/rust-lang/compiler-team/issues/574) which describes the rationale behind introducing a separate target.
> - Tier 3 targets may have unusual requirements to build or use, but must not create legal issues or impose onerous legal terms for the Rust project or for Rust developers or users.
> - The target must not introduce license incompatibilities.
> - Anything added to the Rust repository must be under the standard Rust license (MIT OR Apache-2.0).
> - The target must not cause the Rust tools or libraries built for any other host (even when supporting cross-compilation to the target) to depend on any new dependency less permissive than the Rust licensing policy. This applies whether the dependency is a Rust crate that would require adding new license exceptions (as specified by the tidy tool in the rust-lang/rust repository), or whether the dependency is a native library or binary. In other words, the introduction of the target must not cause a user installing or running a version of Rust or the Rust tools to be subject to any new license requirements.
> - Compiling, linking, and emitting functional binaries, libraries, or other code for the target (whether hosted on the target itself or cross-compiling from another target) must not depend on proprietary (non-FOSS) libraries. Host tools built for the target itself may depend on the ordinary runtime libraries supplied by the platform and commonly used by other applications built for the target, but those libraries must not be required for code generation for the target; cross-compilation to the target must not require such libraries at all. For instance, rustc built for the target may depend on a common proprietary C runtime library or console output library, but must not depend on a proprietary code generation library or code optimization library. Rust's license permits such combinations, but the Rust project has no interest in maintaining such combinations within the scope of Rust itself, even at tier 3.
> - "onerous" here is an intentionally subjective term. At a minimum, "onerous" legal/licensing terms include but are not limited to: non-disclosure requirements, non-compete requirements, contributor license agreements (CLAs) or equivalent, "non-commercial"/"research-only"/etc terms, requirements conditional on the employer or employment of any particular Rust developers, revocable terms, any requirements that create liability for the Rust project or its developers or users, or any requirements that adversely affect the livelihood or prospects of the Rust project or its developers or users.
This PR does not introduce any new dependency.
The new target doesn’t support building host tools.
> Tier 3 targets should attempt to implement as much of the standard libraries as possible and appropriate (core for most targets, alloc for targets that can support dynamic memory allocation, std for targets with an operating system or equivalent layer of system-provided functionality), but may leave some code unimplemented (either unavailable or stubbed out as appropriate), whether because the target makes it impossible to implement or challenging to implement. The authors of pull requests are not obligated to avoid calling any portions of the standard library on the basis of a tier 3 target not implementing those portions.
The full standard library is available for this target as it’s an extension to an existing target that has already supported it.
> The target must provide documentation for the Rust community explaining how to build for the target, using cross-compilation if possible. If the target supports running binaries, or running tests (even if they do not pass), the documentation must explain how to run such binaries or tests for the target, using emulation if possible or dedicated hardware if necessary.
Only manual test running is supported at the moment with some tweaks in the test runner codebase. For build and running tests see [src/doc/rustc/src/platform-support/wasm32-wasi-preview1-threads.md](https://github.com/rust-lang/rust/pull/112922/files#diff-a48ee9d94f13e12be24eadd08eb47b479c153c340eeea4ef22276d876dfd4f3e).
> - Neither this policy nor any decisions made regarding targets shall create any binding agreement or estoppel by any party. If any member of an approving Rust team serves as one of the maintainers of a target, or has any legal or employment requirement (explicit or implicit) that might affect their decisions regarding a target, they must recuse themselves from any approval decisions regarding the target's tier status, though they may otherwise participate in discussions.
> - This requirement does not prevent part or all of this policy from being cited in an explicit contract or work agreement (e.g. to implement or maintain support for a target). This requirement exists to ensure that a developer or team responsible for reviewing and approving a target does not face any legal threats or obligations that would prevent them from freely exercising their judgment in such approval, even if such judgment involves subjective matters or goes beyond the letter of these requirements.
> - Tier 3 targets must not impose burden on the authors of pull requests, or other developers in the community, to maintain the target. In particular, do not post comments (automated or manual) on a PR that derail or suggest a block on the PR based on a tier 3 target. Do not send automated messages or notifications (via any medium, including via `@)` to a PR author or others involved with a PR regarding a tier 3 target, unless they have opted into such messages.
> - Backlinks such as those generated by the issue/PR tracker when linking to an issue or PR are not considered a violation of this policy, within reason. However, such messages (even on a separate repository) must not generate notifications to anyone involved with a PR who has not requested such notifications.
> - Patches adding or updating tier 3 targets must not break any existing tier 2 or tier 1 target, and must not knowingly break another tier 3 target without approval of either the compiler team or the maintainers of the other tier 3 target.
> - In particular, this may come up when working on closely related targets, such as variations of the same architecture with different features. Avoid introducing unconditional uses of features that another variation of the target may not have; use conditional compilation or runtime detection, as appropriate, to let each target run code supported by that target.
I acknowledge these requirements and intend to ensure they are met.
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Signed-off-by: ozkanonur <work@onurozkan.dev>
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This changes the bootstrap config `target.*.profiler` from a plain bool
to also allow a string, which will be used as a path to the pre-built
profiling runtime for that target. Then `profiler_builtins/build.rs`
reads that in a `LLVM_PROFILER_RT_LIB` environment variable.
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Signed-off-by: Martin Kröning <martin.kroening@eonerc.rwth-aachen.de>
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remove outdated `FIXME`s in bootstrap internals
self-explanatory
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misc bootstrap cleanups
- rename `detail_exit_macro` to `exit`
- remove unnecessary `Builder::new_standalone` function
- support `x suggest` with build-metrics
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Signed-off-by: ozkanonur <work@onurozkan.dev>
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`detail` and `macro` weren't adding any info.
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various download-rustc fixes
separated out from https://github.com/rust-lang/rust/pull/112143 because it keeps getting stuck in limbo.
best reviewed commit-by-commit
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It might happen that a synthetic target name does not match one of the
hardcoded ones in std's build script, causing std to fail to build. This
commit changes the std build script avoid including the restricted-std
feature unconditionally when a synthetic target is being built.
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Some targets are added to these hashmaps at runtime, and are not present
during dry runs. To avoid errors, this commit changes all the related
functions to always return empty strings/paths during dry runs.
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This will be needed to create synthetic targets in future commits.
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Give more helpful progress messages in `Assemble`
Before (download-rustc):
```
# no output
```
After (download-rustc):
```
Creating a sysroot for stage2 compiler (use `rustup toolchain link 'name' build/host/stage2`)
```
Before (compiling from source):
```
Building compiler artifacts (stage0 -> stage1, x86_64-unknown-linux-gnu)
Assembling stage1 compiler
Build stage1 library artifacts (x86_64-unknown-linux-gnu -> i686-unknown-linux-gnu)
Building compiler artifacts (stage0:x86_64-unknown-linux-gnu -> stage1:i686-unknown-linux-gnu)
Assembling stage1 compiler (i686-unknown-linux-gnu)
```
After (compiling from source):
```
Building compiler artifacts (stage0 -> stage1, x86_64-unknown-linux-gnu)
Creating a sysroot for stage1 compiler (use `rustup toolchain link 'name' build/host/stage1`)
Build stage1 library artifacts (x86_64-unknown-linux-gnu)
Building compiler artifacts (stage0:x86_64-unknown-linux-gnu -> stage1:i686-unknown-linux-gnu)
Creating a sysroot for stage1 compiler (i686-unknown-linux-gnu) (use `rustup toolchain link 'name' build/i686-unknown-linux-gnu/stage1`)
```
cc https://rust-lang.zulipchat.com/#narrow/stream/122651-general/topic/Unable.20to.20compile.20rustc.20MSVC, https://discord.com/channels/273534239310479360/957720175619215380/1116867245499498506
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Before (download-rustc):
```
# no output
```
After (download-rustc):
```
Creating a sysroot for stage2 compiler (use `rustup toolchain link 'name' build/host/stage2`)
```
Before (compiling from source):
```
Building compiler artifacts (stage0 -> stage1, x86_64-unknown-linux-gnu)
Assembling stage1 compiler
Build stage1 library artifacts (x86_64-unknown-linux-gnu -> i686-unknown-linux-gnu)
Building compiler artifacts (stage0:x86_64-unknown-linux-gnu -> stage1:i686-unknown-linux-gnu)
Assembling stage1 compiler (i686-unknown-linux-gnu)
```
After (compiling from source):
```
Building compiler artifacts (stage0 -> stage1, x86_64-unknown-linux-gnu)
Creating a sysroot for stage1 compiler (use `rustup toolchain link 'name' build/host/stage1`)
Build stage1 library artifacts (x86_64-unknown-linux-gnu)
Building compiler artifacts (stage0:x86_64-unknown-linux-gnu -> stage1:i686-unknown-linux-gnu)
Creating a sysroot for stage1 compiler (i686-unknown-linux-gnu) (use `rustup toolchain link 'name' build/i686-unknown-linux-gnu/stage1`)
```
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Avoid one `rustc` rebuild in the optimized build pipeline
This PR changes the optimized build pipeline to avoid one `rustc` rebuild, inspired by [this comment](https://github.com/rust-lang/rust/issues/112011#issuecomment-1564991175). This speeds up the pipeline by 5-10 minutes. After this change, we **no longer gather LLVM PGO profiles from compiling stage 2 of `rustc`**.
Now we build `rustc` two times (1x PGO instrumented, 1x PGO optimized) and LLVM three times (1x normal, 1x PGO instrumented, 1x PGO optimized). It should be possible to cache the normal LLVM build, but I'll leave that for another PR.
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before, this hardcoded `.so` as the extension for dynamically linked objects, which is incorrect
everywhere except linux
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Fix `x test core` when download-rustc is enabled
Fix `x test --stage 2 core` when download-rustc is enabled
This works by building std from source instead of downloading it, for library tests only.
This was somewhat complicated because of the following requirements:
1. Unconditionally downloading libstd breaks `x test core`, because `coretests` requires the std loaded from the sysroot to match the std that's currently being tested.
2. Unconditionally rebuilding libstd breaks `x test ui-fulldeps librustdoc`, because anything loading `rustc_private` needs to use the same libstd that rustc was built with.
Break the knot by introducing a new `stage2-test-sysroot`, used only for testing `std` itself. This
holds a freshly compiled std, while `stage2` and `ci-rustc-sysroot` still hold the downloaded std.
This also extends the existing `cp_filtered` in Sysroot to apply to the `rust-std` component, not just the `rustc-dev` component, to avoid having both versions of std in `stage2-test-sysroot`.
Fixes #110352.
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enhancements on build_helper utilization and rustdoc-gui-test
This change provides codebase improvements, resolves `FIXME` in `rustdoc-gui-test` and makes `rustdoc-gui` test able to find local `node_modules` directory outside of the source root.
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This works by building std from source unconditionally instead of downloading it, for library tests only.
This was somewhat complicated because of the following requirements:
1. Unconditionally downloading libstd breaks `x test std`, because `coretests` requires the std loaded from the sysroot to match the std that's currently being tested.
2. Unconditionally rebuilding libstd breaks `x test ui-fulldeps librustdoc`, because anything loading `rustc_private` needs to use the same libstd that rustc was built with.
Break the knot by introducing a new `stage2-test-sysroot`, used only for testing `std` itself. This
holds a freshly compiled std, while `stage2` and `ci-rustc-sysroot` still hold the downloaded std.
This also extends the existing `cp_filtered` in Sysroot to apply to the `rust-std` component, not just the `rustc-dev` component.
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Signed-off-by: ozkanonur <work@onurozkan.dev>
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and document why the single remaining place can't switch
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This fixes the panic from the previous commit.
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r=Mark-Simulacrum
enable `rust_2018_idioms` lint group for doctests
With this change, `rust_2018_idioms` lint group will be enabled for compiler/libstd doctests.
Resolves #106086
Resolves #99144
Signed-off-by: ozkanonur <work@onurozkan.dev>
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Signed-off-by: ozkanonur <work@onurozkan.dev>
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