[tools/tests] Fix bug in 'link all' test and the resulting regression that showed up in code. #18016
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… that showed up in code.
There's a 'link all' test that's verifying that the IntroducedAttribute is
linked away. It does so by verifying that the linked app doesn't have a
'IntroducedAttribute' type - but the test was constructing the fully qualified
type name to look for incorrectly:
ObjCRuntime.IntroducedAttribute, , Microsoft.iOS
Note the double comma: that meant we wouldn't find the type, even if it wasn't linked away.
The fix is easy (use a single comma), with one caveat (don't use a constant
string, because the linker sees the reference to
"ObjCRuntime.IntroducedAttribute" and _helpfully_ preserves it, exactly what
we don't want), but it revealed that the tested behavior regressed: a fully
linked app wouldn't link away the IntroducedAttribute.
So a fix is also needed: properly remove TVAttribute, WatchAttribute and
MacCatalystAttribute, which are subclasses of IntroducedAttribute (and what
would make the linker keep IntroducedAttribute).
Interestingly this showed up because of a bug in the runtime, where parsing
the invalid assembly name would now throw an exception
(dotnet/runtime#84118).
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There's a 'link all' test that's verifying that the IntroducedAttribute is
linked away. It does so by verifying that the linked app doesn't have a
'IntroducedAttribute' type - but the test was constructing the fully qualified
type name to look for incorrectly:
Note the double comma: that meant we wouldn't find the type, even if it wasn't linked away.
The fix is easy (use a single comma), with one caveat (don't use a constant
string, because the linker sees the reference to
"ObjCRuntime.IntroducedAttribute" and helpfully preserves it, exactly what
we don't want), but it revealed that the tested behavior regressed: a fully
linked app wouldn't link away the IntroducedAttribute.
So a fix is also needed: properly remove TVAttribute, WatchAttribute and
MacCatalystAttribute, which are subclasses of IntroducedAttribute (and what
would make the linker keep IntroducedAttribute).
Interestingly this showed up because of a bug in the runtime, where parsing
the invalid assembly name would now throw an exception
(dotnet/runtime#84118).