[libc++][chrono] Fixes formatter duration.
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Authored by Mordante on Nov 28 2022, 8:35 AM.

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Reviewers

EricWF

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Restricted Project

Summary

@EricWF spotted this issue in the post-commit review comments of
D134742. However the suggestion to just use chrono calculations can
result in similar issues when using small fractional seconds.

Diff Detail

Repository: rG LLVM Github Monorepo

Unit TestsFailed
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	Time	Test
	1,500,020 ms	libcxx CI Apple back-deployment macosx11.0 arm64 > apple-libc++-backdeployment-cfg-in.std/thread/thread_condition::notify_all_at_thread_exit_lwg3343.pass.cpp Script: -- : 'COMPILED WITH'; /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ /Users/libcxx-buildkite-agent/libcxx.buildkite-agent/builds/f1-1-macminivault-com/llvm-project/libcxx-ci/libcxx/test/std/thread/thread.condition/notify_all_at_thread_exit_lwg3343.pass.cpp -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk --target=arm64-apple-macosx11.0 -nostdinc++ -I /Users/libcxx-buildkite-agent/libcxx.buildkite-agent/builds/f1-1-macminivault-com/llvm-project/libcxx-ci/build/apple-system-backdeployment-11.0/include/c++/v1 -I /Users/libcxx-buildkite-agent/libcxx.buildkite-agent/builds/f1-1-macminivault-com/llvm-project/libcxx-ci/libcxx/test/support -std=c++2b -Werror -Wall -Wctad-maybe-unsupported -Wextra -Wshadow -Wundef -Wno-unused-command-line-argument -Wno-attributes -Wno-pessimizing-move -Wno-c++11-extensions -Wno-noexcept-type -Wno-atomic-alignment -Wno-user-defined-literals -Wno-tautological-compare -Wsign-compare -Wunused-variable -Wunused-parameter -Wunreachable-code -Wno-unused-local-typedef -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -fcoroutines-ts -Werror=thread-safety -Wuser-defined-warnings -nostdlib++ -L /Users/libcxx-buildkite-agent/libcxx.buildkite-agent/builds/f1-1-macminivault-com/llvm-project/libcxx-ci/build/apple-system-backdeployment-11.0/lib -lc++ -o /Users/libcxx-buildkite-agent/libcxx.buildkite-agent/builds/f1-1-macminivault-com/llvm-project/libcxx-ci/build/apple-system-backdeployment-11.0/test/std/thread/thread.condition/Output/notify_all_at_thread_exit_lwg3343.pass.cpp.dir/t.tmp.exe
	1,499,990 ms	libcxx CI Apple back-deployment with assertions enabled > apple-libc++-backdeployment-cfg-in.std/thread/thread_condition::notify_all_at_thread_exit_lwg3343.pass.cpp Script: -- : 'COMPILED WITH'; /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ /Users/libcxx-buildkite-agent/libcxx.buildkite-agent/builds/w4-4macminivaultcom-local/llvm-project/libcxx-ci/libcxx/test/std/thread/thread.condition/notify_all_at_thread_exit_lwg3343.pass.cpp -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk --target=arm64-apple-macosx11.0 -nostdinc++ -I /Users/libcxx-buildkite-agent/libcxx.buildkite-agent/builds/w4-4macminivaultcom-local/llvm-project/libcxx-ci/build/apple-system-backdeployment-assertions-11.0/include/c++/v1 -I /Users/libcxx-buildkite-agent/libcxx.buildkite-agent/builds/w4-4macminivaultcom-local/llvm-project/libcxx-ci/libcxx/test/support -std=c++2b -Werror -Wall -Wctad-maybe-unsupported -Wextra -Wshadow -Wundef -Wno-unused-command-line-argument -Wno-attributes -Wno-pessimizing-move -Wno-c++11-extensions -Wno-noexcept-type -Wno-atomic-alignment -Wno-user-defined-literals -Wno-tautological-compare -Wsign-compare -Wunused-variable -Wunused-parameter -Wunreachable-code -Wno-unused-local-typedef -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_ASSERTIONS=1 -fcoroutines-ts -Werror=thread-safety -Wuser-defined-warnings -nostdlib++ -L /Users/libcxx-buildkite-agent/libcxx.buildkite-agent/builds/w4-4macminivaultcom-local/llvm-project/libcxx-ci/build/apple-system-backdeployment-assertions-11.0/lib -lc++ -o /Users/libcxx-buildkite-agent/libcxx.buildkite-agent/builds/w4-4macminivaultcom-local/llvm-project/libcxx-ci/build/apple-system-backdeployment-assertions-11.0/test/std/thread/thread.condition/Output/notify_all_at_thread_exit_lwg3343.pass.cpp.dir/t.tmp.exe

Event Timeline

Mordante created this revision.Nov 28 2022, 8:35 AM

Herald added a project: Restricted Project. · View Herald TranscriptNov 28 2022, 8:35 AM

Mordante requested review of this revision.Nov 28 2022, 8:35 AM

Herald added a project: Restricted Project. · View Herald TranscriptNov 28 2022, 8:35 AM

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mclow.lists added a subscriber: mclow.lists.Nov 28 2022, 8:44 AM

mclow.lists added inline comments.

libcxx/test/std/time/time.syn/formatter.duration.pass.cpp
1095	Are you sure this number shouldn't be `65'535` (aka `0FFFF`)? Wouldn't it be better to write them all in hex, so it's clear what they're represententing?