tree b916625b07f94a4c8bc2daac9380bbf327394352
parent 881d5405402d6e8c54f83eed6216a9ed29778006
author Cherry Zhang <cherryyz@google.com> 1589498579 -0400
committer Cherry Zhang <cherryyz@google.com> 1589559325 +0000

cmd/link: detect trampoline of deferreturn call

The runtime needs to find the PC of the deferreturn call in a few
places. So for functions that have defer, we record the PC of
deferreturn call in its funcdata.

For very large binaries, the deferreturn call could be made
through a trampoline. The current code of finding deferreturn PC
fails in this case. This CL handles the trampoline as well.

Fixes #39049.

Change-Id: I929be54d6ae436f5294013793217dc2a35f080d4
Reviewed-on: https://go-review.googlesource.com/c/go/+/234105
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>