Vedant Kumar 025d4791c0 [DWARF] Emit DW_AT_call_return_pc as an address ...

This reverts D53469, which changed llvm's DWARF emission to emit
DW_AT_call_return_pc as a function-local offset. Such an encoding is not
compatible with post-link block re-ordering tools and isn't standards-
compliant.

In addition to reverting back to the original DW_AT_call_return_pc
encoding, teach lldb how to fix up DW_AT_call_return_pc when the address
comes from an object file pointed-to by a debug map. While doing this I
noticed that lldb's support for tail calls that cross a DSO/object file
boundary wasn't covered, so I added tests for that. This latter case
exercises the newly added return PC fixup.

The dsymutil changes in this patch were originally included in D49887:
the associated test should be sufficient to test DW_AT_call_return_pc
encoding purely on the llvm side.

Differential Revision: https://reviews.llvm.org/D72489

2020-01-15 13:02:23 -08:00

..

llvm

[DWARF] Emit DW_AT_call_return_pc as an address

2020-01-15 13:02:23 -08:00

llvm-c

[Coroutines] Rename "legacy" passes (NFC)

2020-01-01 21:41:16 -05:00