Vedant Kumar f7052da6db [DWARF] Emit DW_AT_call_pc for tail calls ...

Record the address of a tail-calling branch instruction within its call
site entry using DW_AT_call_pc. This allows a debugger to determine the
address to use when creating aritificial frames.

This creates an extra attribute + relocation at tail call sites, which
constitute 3-5% of all call sites in xnu/clang respectively.

rdar://60307600

Differential Revision: https://reviews.llvm.org/D76336

2020-03-24 12:01:55 -07:00

120 KiB

Raw Blame History

View Raw