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cmd/compile: DWARF DW_TAG_subroutine_type doesn't mark return value's formal parameters as DW_AT_variable_parameter #59977
Issues related to the Go compiler and/or runtime.
Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.
What version of Go are you using (
Does this issue reproduce with the latest release?
What operating system and processor architecture are you using (
What did you do?
When trying to decode the type info for a pointer to a function (DW_TAG_subroutine_type), the return values of the function type DIE aren't encoded in a way that lets you determine that they are return values instead of normal parameters.
What did you expect to see?
I expected that a function type DIE's parameters & return values to be encoded in a similar way as a function DIE.
For example, the function that is returned from getfoo() is defined this way, with the return value being the correct type and being marked with a DW_AT_variable_parameter flag:
What did you see instead?
Looking at the DWARF for the function type definition, I get a DIE that defines 2 parameters with no way to tell that the last parameter is a return value:
Additionally, the return types are converted to a pointer-to-real-return-type.
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