cmd/compile: add debug log prior to export data lookup
If there is a crash in LookupFunc (which has occurred a few times now),
this ensures that we log the offending symbol before crashing.
For #67016.
Change-Id: I0119597de2be3d1b97c41a9361273d1feb90ec11
Reviewed-on: https://go-review.googlesource.com/c/go/+/581437
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
diff --git a/src/cmd/compile/internal/pgoir/irgraph.go b/src/cmd/compile/internal/pgoir/irgraph.go
index cb4333e..f1c8d13 100644
--- a/src/cmd/compile/internal/pgoir/irgraph.go
+++ b/src/cmd/compile/internal/pgoir/irgraph.go
@@ -333,6 +333,9 @@
// devirtualization. Instantiation of generic functions
// will likely need to be done at the devirtualization
// site, if at all.
+ if base.Debug.PGODebug >= 3 {
+ fmt.Printf("addIndirectEdges: %s attempting export data lookup\n", key.CalleeName)
+ }
fn, err := LookupFunc(key.CalleeName)
if err == nil {
if base.Debug.PGODebug >= 3 {
