cmd/compile: generated DWARF inlining info

[thanm]

Tracking issue for adding DWARF inline info support to the compiler.
This issue is a placeholder -- a link to the design document will follow in the next day or two.

See also related:
mid-stack inlining tracking issue #19348
mid-stack inlining proposal

[gopherbot]

Change https://golang.org/cl/66910 mentions this issue: design: add DWARF inline info generation design note.

[thanm]

Update: it turns out that DW_AT_call_file and DW_AT_call_line attributes in the DW_TAG_inlined_subroutine DIE are more or less required by GDB (without them, it ignores the inlined call records). I am updating the proposal to reflect this requirement.

[gopherbot]

Change https://golang.org/cl/72750 mentions this issue: proposal: small update to DWARF inlining proposal

[gopherbot]

Change https://golang.org/cl/75550 mentions this issue: compiler,linker: support for DWARF inlined instances

[ianlancetaylor]

Is there anything left to do here?

[thanm]

No, probably best to close this out. I have a few ideas on how to improve testing, but those can be addressed separately.