runtime: suppress thread event prints in gdb test

Pass "set print thread-events off" to gdb to suppress thread
event prints, like "[New Thread 0xe7b83b40 (LWP 18609)]". We
don't check them, and the extra output may confuse our other
checks, in particular, checkCleanBacktrace.

Hopefully fixes #31569.

Change-Id: I6549e1280da7afa1d2e38da2b2fa7cc18c2f0373
Reviewed-on: https://go-review.googlesource.com/c/go/+/172980
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

diff --git a/src/runtime/runtime-gdb_test.go b/src/runtime/runtime-gdb_test.go
index 8117a5c979966bc0c45fb9bbf65ada14e8545b96..66f275969baaa590354a413a74f33d976388d321 100644 (file)
--- a/src/runtime/runtime-gdb_test.go
+++ b/src/runtime/runtime-gdb_test.go
@@ -180,6 +180,7 @@ func testGdbPython(t *testing.T, cgo bool) {
        args := []string{"-nx", "-q", "--batch",
                "-iex", "add-auto-load-safe-path " + filepath.Join(runtime.GOROOT(), "src", "runtime"),
                "-ex", "set startup-with-shell off",
+               "-ex", "set print thread-events off",
        }
        if cgo {
                // When we build the cgo version of the program, the system's