llvmPackages_15.llvm: fix the tests on x86_64-darwin
Details within but ultimately there isn't a satisfying resolution for
any of the three test failures we were seeing and all three deserve
further exploration.
For the `sw_vers` macOS version issue in particular, it's possible to
observe the nixpkgs provided `CoreFoundation` vs system `CoreFoundation`
for `x86_64` and `aarch64` like so (on a host running macOS `13.0.1`):
```console
$ nix-shell -p darwin.DarwinTools --system aarch64-darwin --command "sw_vers"
ProductName: macOS
ProductVersion: 13.0.1
BuildVersion: 22A400
$ nix-shell -p darwin.DarwinTools --system x86_64-darwin --command "sw_vers"
ProductName: Mac OS X
ProductVersion: 10.16
BuildVersion: 22A400
```
Where `/System/Library/CoreServices/SystemVersion.plist` has:
```console
$ cat /System/Library/CoreServices/SystemVersion.plist | grep ProductVersion
-A 1
<key>ProductVersion</key>
<string>13.0.1</string>
```
Further:
```console
$ nix-shell -p darwin.DarwinTools --system aarch64-darwin --command 'otool -L $(which sw_vers)'
/nix/store/nb2q33ak2zif49ndcpc6m823z0vhmy8y-DarwinTools-1/bin/sw_vers:
/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 1770.255.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1292.60.1)
$ nix-shell -p darwin.DarwinTools --system x86_64-darwin --command 'otool -L $(which sw_vers)'
/nix/store/88v4kjvgwl71byfpvd0baviiq7l5appc-DarwinTools-1/bin/sw_vers:
@rpath/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 1454.90.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1238.60.2)
```
For the `x86_64` `sw_vers` binary we can see rpath:
```console
$ nix-shell -p darwin.DarwinTools --system x86_64-darwin --command 'otool -l $(which sw_vers)' | grep LC_RPATH -A 2 -B 1
Load command 13
cmd LC_RPATH
cmdsize 120
path /nix/store/zvr4wypbgskhhw9cawfn7mmxfa75nh8f-swift-corefoundation-unstable-2018-09-14/Library/Frameworks (offset 12)
```
And we can confirm that the nixpkgs provided `CoreFoundation` is what
ultimately gets loaded:
```console
$ nix-shell -p darwin.DarwinTools --system x86_64-darwin --command 'DYLD_PRINT_LIBRARIES=1 sw_vers'
dyld[16215]: <no uuid> /nix/store/88v4kjvgwl71byfpvd0baviiq7l5appc-DarwinTools-1/bin/sw_vers
dyld[16215]: <no uuid> /nix/store/zvr4wypbgskhhw9cawfn7mmxfa75nh8f-swift-corefoundation-unstable-2018-09-14/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
dyld[16215]: <no uuid> /nix/store/xd2a4xh8kdwq0j67hzgw720npdw5hzkk-ICU-66108/lib/libicucore.A.dylib
<snipped>
```
```bash
nix-diff \
$(nix path-info nixpkgs#legacyPackages.aarch64-darwin.darwin.DarwinTools --derivation) \
$(nix path-info nixpkgs#legacyPackages.x86_64-darwin.darwin.DarwinTools --derivation)
```
doesn't show any _obvious_ discrepancies
This commit is contained in:
Rahul Butani
parent
0ee52512f0
commit
eafb8fbd32
1 changed files with 50 additions and 1 deletions
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@ -150,9 +150,58 @@ in stdenv.mkDerivation (rec {
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rm test/MC/ELF/cfi-version.ll
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# This test tries to call `sw_vers` by absolute path (`/usr/bin/sw_vers`)
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# thus fails under the sandbox:
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# and thus fails under the sandbox:
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substituteInPlace unittests/Support/Host.cpp \
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--replace '/usr/bin/sw_vers' "${(builtins.toString darwin.DarwinTools) + "/bin/sw_vers" }"
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'' + optionalString (stdenv.isDarwin && stdenv.hostPlatform.isx86) ''
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# This test tries to call the intrinsics `@llvm.roundeven.f32` and
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# `@llvm.roundeven.f64` which seem to (incorrectly?) lower to `roundevenf`
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# and `roundeven` on x86_64 macOS.
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#
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# However these functions are glibc specific so the test fails:
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# - https://www.gnu.org/software/gnulib/manual/html_node/roundevenf.html
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# - https://www.gnu.org/software/gnulib/manual/html_node/roundeven.html
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#
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# TODO(@rrbutani): this seems to run fine on `aarch64-darwin`, why does it
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# pass there?
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substituteInPlace test/ExecutionEngine/Interpreter/intrinsics.ll \
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--replace "%roundeven32 = call float @llvm.roundeven.f32(float 0.000000e+00)" "" \
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--replace "%roundeven64 = call double @llvm.roundeven.f64(double 0.000000e+00)" ""
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# This test fails on darwin x86_64 because `sw_vers` reports a different
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# macOS version than what LLVM finds by reading
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# `/System/Library/CoreServices/SystemVersion.plist` (which is passed into
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# the sandbox on macOS).
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#
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# The `sw_vers` provided by nixpkgs reports the macOS version associated
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# with the `CoreFoundation` framework with which it was built. Because
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# nixpkgs pins the SDK for `aarch64-darwin` and `x86_64-darwin` what
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# `sw_vers` reports is not guaranteed to match the macOS version of the host
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# that's building this derivation.
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#
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# Astute readers will note that we only _patch_ this test on aarch64-darwin
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# (to use the nixpkgs provided `sw_vers`) instead of disabling it outright.
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# So why does this test pass on aarch64?
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#
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# Well, it seems that `sw_vers` on aarch64 actually links against the _host_
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# CoreFoundation framework instead of the nixpkgs provided one.
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#
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# Not entirely sure what the right fix is here. I'm assuming aarch64
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# `sw_vers` doesn't intentionally link against the host `CoreFoundation`
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# (still digging into how this ends up happening, will follow up) but that
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# aside I think the more pertinent question is: should we be patching LLVM's
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# macOS version detection logic to use `sw_vers` instead of reading host
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# paths? This *is* a way in which details about builder machines can creep
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# into the artifacts that are produced, affecting reproducibility, but it's
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# not clear to me when/where/for what this even gets used in LLVM.
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#
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# TODO(@rrbutani): fix/follow-up
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substituteInPlace unittests/Support/Host.cpp \
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--replace "getMacOSHostVersion" "DISABLED_getMacOSHostVersion"
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# This test fails with a `dysmutil` crash; have not yet dug into what's
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# going on here (TODO(@rrbutani)).
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rm test/tools/dsymutil/ARM/obfuscated.test
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'' + ''
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# FileSystem permissions tests fail with various special bits
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substituteInPlace unittests/Support/CMakeLists.txt \
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