cmd/go: add comment about SIGUSR2 on iOS

Missing from CL 34926. Change-Id: I4a046440c30811f26da53bee0e853dae3b0ac57a Reviewed-on: https://go-review.googlesource.com/35123 Reviewed-by: Brad Fitzpatrick <[email protected]>
golang · Jan 12, 2017 · 4f0aac5 · 4f0aac5
1 parent 333f764
commit 4f0aac5
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/cmd/go/test.go b/src/cmd/go/test.go
@@ -1531,6 +1531,10 @@ func coverRegisterFile(fileName string, counter []uint32, pos []uint32, numStmts
 
 func main() {
 {{if .IsIOS}}
+	// Send a SIGUSR2, which will be intercepted by LLDB to
+	// tell the test harness that installation was successful,
+	// and to give the exec script a chance set the current
+	// working directory. See misc/ios/go_darwin_arm_exec.go.
 	signal.Notify(make(chan os.Signal), syscall.SIGUSR2)
 	syscall.Kill(0, syscall.SIGUSR2)
 	signal.Reset(syscall.SIGUSR2)