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[TSan] Fix warning when compiling with -Wmissing-designated-field-initializers #163401

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Merged
DanBlackwell merged 1 commit into from
Oct 28, 2025
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[TSan] Fix warning when compiling with -Wmissing-designated-field-initializers #163401

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2 changes: 2 additions & 0 deletions compiler-rt/lib/tsan/rtl/tsan_platform_mac.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -259,7 +259,9 @@ void InitializePlatform() {

ThreadEventCallbacks callbacks = {
.create = ThreadCreateCallback,
.start = nullptr,
.terminate = ThreadTerminateCallback,
.destroy = nullptr,
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@yln yln Oct 14, 2025

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Interesting. I thought unmentioned members are guaranteed to be default-initialized.

The semantics of the warning seem to be under discussion:
#68933
#56628

Did this warning pop up with a new version of Clang or was it always there?

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@DanBlackwell DanBlackwell Oct 15, 2025

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This was picked up by someone building https://github.com/swiftlang/swift (which depends on llvm-project). It seems that they are setting -Wmissing-designated-field-initializers somehow. I rebuilt compiler-rt with the flag and this was the only warning I got, so I figured it's easy enough to clean up. I don't think that the standard llvm CMake build will hit this error, I had to add the flag to my CMAKE_CXX_FLAGS to trigger this.

I agree that this warning feels pedantic.

};
InstallPthreadIntrospectionHook(callbacks);
#endif
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