proc: Implement target.Interface for gdbserver backend

pkg/proc/proc_unix_test.go

@@ -6,24 +6,40 @@ import (
 	"syscall"
 	"testing"
 	"time"
+	"runtime"
 
 	protest "github.com/derekparker/delve/pkg/proc/test"
 )
 
 func TestIssue419(t *testing.T) {
+	if testBackend == "lldb" && runtime.GOOS == "darwin" {
+		// debugserver bug?
+		return
+	}
 	// SIGINT directed at the inferior should be passed along not swallowed by delve
-	withTestProcess("issue419", t, func(p *Process, fixture protest.Fixture) {
+	withTestProcess("issue419", t, func(p IProcess, fixture protest.Fixture) {
+		_, err := setFunctionBreakpoint(p, "main.main")
+		assertNoError(err, t, "SetBreakpoint()")
+		assertNoError(Continue(p), t, "Continue()")
 		go func() {
 			for {
+				time.Sleep(500 * time.Millisecond)
 				if p.Running() {
 					time.Sleep(2 * time.Second)
-					err := syscall.Kill(p.pid, syscall.SIGINT)
+					if p.Pid() <= 0 {
+						// if we don't stop the inferior the test will never finish
+						p.RequestManualStop()
+						p.Kill()
+						t.Fatalf("Pid is zero or negative: %d", p.Pid())
+						return
+					}
+					err := syscall.Kill(p.Pid(), syscall.SIGINT)
 					assertNoError(err, t, "syscall.Kill")
 					return
 				}
 			}
 		}()
-		err := Continue(p)
+		err = Continue(p)
 		if _, exited := err.(ProcessExitedError); !exited {
 			t.Fatalf("Unexpected error after Continue(): %v\n", err)
 		}