[release-branch.go1.21] runtime: mark traceEnabled and traceShuttingDown as no:split

This fixes a regression from CL 494181.
The traceEnabled function splits the stack and is being
called by reentersyscall that shouldn't call anything
that splits the stack. Same with traceShuttingDown.

For #61975
Fixes #61987

Change-Id: I5eca0ba74cfa6acb0259e8400b03c2093cd59dd1
GitHub-Last-Rev: 9e55ae9d7cc700de9757d32a7905127a349d973a
GitHub-Pull-Request: golang/go#61981
Reviewed-on: https://go-review.googlesource.com/c/go/+/519055
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@google.com>
(cherry picked from commit aa5d483f25e89f3bf399362ccc9a5b146cae5c79)
Reviewed-on: https://go-review.googlesource.com/c/go/+/519495
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Auto-Submit: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>

diff --git a/src/runtime/trace.go b/src/runtime/trace.go
index a4d50d77a0102d880dd9b0d0efc5df6917b05bbc..7d7987c90c4993414bdaeb1d7589612d54bdb79e 100644 (file)
--- a/src/runtime/trace.go
+++ b/src/runtime/trace.go
@@ -257,11 +257,15 @@ func traceBufPtrOf(b *traceBuf) traceBufPtr {
 }
 
 // traceEnabled returns true if the trace is currently enabled.
+//
+//go:nosplit
 func traceEnabled() bool {
        return trace.enabled
 }
 
 // traceShuttingDown returns true if the trace is currently shutting down.
+//
+//go:nosplit
 func traceShuttingDown() bool {
        return trace.shutdown
 }