Add a build matrix for Ruby with ASAN #10
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I don't think this is going to build yet (building with OpenSSL with ASAN enabled causes a test failure on my machine) - @eregon is there a way to run the build on the branch and find out? |
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You should be able to run it on your fork, e.g. via workflow_dispatch at https://github.com/KJTsanaktsidis/ruby-dev-builder/actions/workflows/build.yml or just adding a commit to trigger on push |
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@eregon this should be ready for a review now - WDYT? Green build with this patch: https://github.com/KJTsanaktsidis/ruby-dev-builder-workflow-runs/actions/runs/9411904718 Note I also wanted to compile libffi with ASAN as well, but I need to get libffi/libffi#839 merged upstream first. |
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.github/workflows/build.yml
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| @@ -118,6 +120,9 @@ jobs: | |||
| with: | |||
| ruby-version: 3.2 | |||
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| - run: chmod 755 $HOME # https://github.com/actions/virtual-environments/issues/267 | |||
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Do we need this? The Rubies built by setup-ruby remove this warnings so it shouldn't happen.
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It was already there, I was just moving it around. 755 does seem like the wrong permission for $HOME...
I'll try removing it in a separate PR perhaps.
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Ah right, it was not clear in the diff. I think it can be removed, I'll try it.
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Ah so you merged the ASAN stuff with I wonder if it should be separate. The fact ASAN needs to disable M:N threading makes me think it's better to be separate. It looks like the ASAN stuff doesn't work on macOS? But that should be no problem we can just use One thing which is not ideal is it seems to take ~30min with ASAN vs ~20min before for the CI jobs here. |
| run: | | ||
| # These flags get applied only to the Ruby build, not to the libs. | ||
| # Clang > 17 does not work with M:N threading: https://bugs.ruby-lang.org/issues/20243 | ||
| echo "cppflags=-DENABLE_PATH_CHECK=0 -DRUBY_DEBUG=1 -DVM_CHECK_MODE=1 -DUSE_MN_THREADS=0" >> $GITHUB_ENV |
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This is some duplication + override and it's far from the previous usage, that seems problematic.
I think it could be addressed by moving the other configure command lines closer to here.
.github/workflows/build.yml
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| @@ -129,13 +134,80 @@ jobs: | |||
| echo "optflags=-O3 -fno-inline" >> $GITHUB_ENV | |||
| if: matrix.name == 'debug' | |||
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| - name: Install Clang 18 (debug asan) | |||
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Are the clang(s) available on the runners not recent enough?
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Not in Ubuntu 22.04 and 20.04. 24.04's is.
I'm happy to do that if you prefer - I don't have a strong opinion on it. But..
This isn't an ASAN thing. It's actually totally broken in Clang > 17 regardless of ASAN being enabled or not. Clang has started optimising out loads from the thread-local storage pointer register ( |
I honestly haven't tried very hard on macOS yet. I was thinking to kind of finish the job with ASAN on linux before I tried to get it properly working on macOS. |
It compiles some of Ruby's key dependencies with ASAN enabled, ships those dynamic libraries to a location in Ruby's prefix (which is part of the tarball deployed with setup-ruby). -Wl,-rpath is used to make sure that these ASANified libs are used in preference to any distribution-provided libs at runtime. Only Ubuntu 24.04 is supported, because the version of clang in 22.04 is too old. MacOS is also not yet supported.
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@eregon I've simplified it all a little bit and separated the ASAN build out into it's own thing. It's now doing dynamic linking (with RPATH) instead of static as well. WDYT? Passing build: https://github.com/KJTsanaktsidis/ruby-dev-builder-workflow-runs/actions/runs/9441682848/job/26002778721 |
| # Set Ruby configure flags | ||
| # Clang > 17 does not work with M:N threading, so we disable it: https://bugs.ruby-lang.org/issues/20243 | ||
| echo "cppflags=-DENABLE_PATH_CHECK=0 -DRUBY_DEBUG=1 -DVM_CHECK_MODE=1 -DUSE_MN_THREADS=0" >> $GITHUB_ENV | ||
| echo "optflags=-O3 -fno-omit-frame-pointer" >> $GITHUB_ENV |
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Do we need to set optflags, is -fno-omit-frame-pointer needed?
.github/workflows/build.yml
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| @@ -118,6 +120,9 @@ jobs: | |||
| with: | |||
| ruby-version: 3.2 | |||
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| - run: chmod 755 $HOME # https://github.com/actions/virtual-environments/issues/267 | |||
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Ah right, it was not clear in the diff. I think it can be removed, I'll try it.
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This looks good, I'll merge now. Sorry for the delay. |
It compiles some of Ruby's key dependencies with ASAN enabled, and statically links them. It builds with Clang 18, which is the minimum required for ASAN to work.
We might want to make ASAN a replacement for debug instead of in addition to it, but I want to see if I can get this to build first and then we can decide.