service/debugger,terminal: API and user interface for follow exec mode (#3286)

Updates #2551

service/rpc2/client.go

@@ -530,6 +530,30 @@ func (c *RPCClient) CoreDumpCancel() error {
 	return c.call("DumpCancel", DumpCancelIn{}, out)
 }
 
+// ListTargets returns the current list of debug targets.
+func (c *RPCClient) ListTargets() ([]api.Target, error) {
+	out := &ListTargetsOut{}
+	err := c.call("ListTargets", ListTargetsIn{}, out)
+	return out.Targets, err
+}
+
+// FollowExec enabled or disabled follow exec mode. When follow exec is
+// enabled Delve will automatically attach to new subprocesses with a
+// command line matched by regex, if regex is nil all new subprocesses are
+// automatically debugged.
+func (c *RPCClient) FollowExec(v bool, regex string) error {
+	out := &FollowExecOut{}
+	err := c.call("FollowExec", FollowExecIn{Enable: v, Regex: regex}, out)
+	return err
+}
+
+// FollowExecEnabled returns true if follow exex mode is enabled.
+func (c *RPCClient) FollowExecEnabled() bool {
+	out := &FollowExecEnabledOut{}
+	_ = c.call("FollowExecEnabled", FollowExecEnabledIn{}, out)
+	return out.Enabled
+}
+
 func (c *RPCClient) call(method string, args, reply interface{}) error {
 	return c.client.Call("RPCServer."+method, args, reply)
 }