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authorSebastien Douheret <sebastien.douheret@iot.bzh>2017-08-07 08:49:25 +0200
committerSebastien Douheret <sebastien.douheret@iot.bzh>2017-08-07 18:01:35 +0200
commit60974e66c57cacdc2483d74718c4bb0a993d2183 (patch)
tree2722369e9cf2c7a3fb499011030fc4718f31e30f /gdb-xds.go
Initial commitv0.0.1
Signed-off-by: Sebastien Douheret <sebastien.douheret@iot.bzh>
Diffstat (limited to 'gdb-xds.go')
-rw-r--r--gdb-xds.go311
1 files changed, 311 insertions, 0 deletions
diff --git a/gdb-xds.go b/gdb-xds.go
new file mode 100644
index 0000000..f174017
--- /dev/null
+++ b/gdb-xds.go
@@ -0,0 +1,311 @@
+package main
+
+import (
+ "encoding/json"
+ "fmt"
+ "net/http"
+ "os"
+ "strings"
+ "syscall"
+
+ "github.com/Sirupsen/logrus"
+ common "github.com/iotbzh/xds-common/golib"
+ "github.com/iotbzh/xds-server/lib/apiv1"
+ "github.com/iotbzh/xds-server/lib/crosssdk"
+ "github.com/iotbzh/xds-server/lib/xdsconfig"
+ sio_client "github.com/zhouhui8915/go-socket.io-client"
+)
+
+// GdbXds -
+type GdbXds struct {
+ log *logrus.Logger
+ ccmd string
+ aargs []string
+ eenv []string
+ uri string
+ prjID string
+ sdkID string
+ rPath string
+ listPrj bool
+ cmdID string
+
+ httpCli *common.HTTPClient
+ ioSock *sio_client.Client
+
+ // callbacks
+ cbOnError func(error)
+ cbOnDisconnect func(error)
+ cbRead func(timestamp, stdout, stderr string)
+ cbInferiorRead func(timestamp, stdout, stderr string)
+ cbOnExit func(code int, err error)
+}
+
+// NewGdbXds creates a new instance of GdbXds
+func NewGdbXds(log *logrus.Logger, args []string, env []string) *GdbXds {
+ return &GdbXds{
+ log: log,
+ ccmd: "$GDB", // var set by environment-setup-xxx script
+ aargs: args,
+ eenv: env,
+ httpCli: nil,
+ ioSock: nil,
+ }
+}
+
+// SetConfig set additional config fields
+func (g *GdbXds) SetConfig(name string, value interface{}) error {
+ switch name {
+ case "uri":
+ g.uri = value.(string)
+ case "prjID":
+ g.prjID = value.(string)
+ case "sdkID":
+ g.sdkID = value.(string)
+ case "rPath":
+ g.rPath = value.(string)
+ case "listProject":
+ g.listPrj = value.(bool)
+ default:
+ return fmt.Errorf("Unknown %s field", name)
+ }
+ return nil
+}
+
+// Init initializes gdb XDS
+func (g *GdbXds) Init() (int, error) {
+
+ // Define HTTP and WS url
+ baseURL := g.uri
+ if !strings.HasPrefix(g.uri, "http://") {
+ baseURL = "http://" + g.uri
+ }
+
+ // Create HTTP client
+ g.log.Infoln("Connect HTTP client on ", baseURL)
+ conf := common.HTTPClientConfig{
+ URLPrefix: "/api/v1",
+ HeaderClientKeyName: "XDS-SID",
+ CsrfDisable: true,
+ }
+ c, err := common.HTTPNewClient(baseURL, conf)
+ if err != nil {
+ return int(syscallEBADE), err
+ }
+ g.httpCli = c
+
+ // First call to check that xds-server is alive
+ var data []byte
+ if err := c.HTTPGet("/folders", &data); err != nil {
+ return int(syscallEBADE), err
+ }
+ g.log.Infof("Result of /folders: %v", string(data[:]))
+
+ // Check mandatory args
+ if g.prjID == "" || g.listPrj {
+ return getProjectsList(c, g.log, data)
+ }
+
+ // Create io Websocket client
+ g.log.Infoln("Connecting IO.socket client on ", baseURL)
+
+ opts := &sio_client.Options{
+ Transport: "websocket",
+ Header: make(map[string][]string),
+ }
+ opts.Header["XDS-SID"] = []string{c.GetClientID()}
+
+ iosk, err := sio_client.NewClient(baseURL, opts)
+ if err != nil {
+ e := fmt.Sprintf("IO.socket connection error: " + err.Error())
+ return int(syscall.ECONNABORTED), fmt.Errorf(e)
+ }
+ g.ioSock = iosk
+
+ iosk.On("error", func(err error) {
+ if g.cbOnError != nil {
+ g.cbOnError(err)
+ }
+ })
+
+ iosk.On("disconnection", func(err error) {
+ if g.cbOnDisconnect != nil {
+ g.cbOnDisconnect(err)
+ }
+ })
+
+ iosk.On(apiv1.ExecOutEvent, func(ev apiv1.ExecOutMsg) {
+ if g.cbRead != nil {
+ g.cbRead(ev.Timestamp, ev.Stdout, ev.Stderr)
+ }
+ })
+
+ iosk.On(apiv1.ExecInferiorOutEvent, func(ev apiv1.ExecOutMsg) {
+ if g.cbInferiorRead != nil {
+ g.cbInferiorRead(ev.Timestamp, ev.Stdout, ev.Stderr)
+ }
+ })
+
+ iosk.On(apiv1.ExecExitEvent, func(ev apiv1.ExecExitMsg) {
+ if g.cbOnExit != nil {
+ g.cbOnExit(ev.Code, ev.Error)
+ }
+ })
+
+ return 0, nil
+}
+
+func (g *GdbXds) Close() error {
+ g.cbOnDisconnect = nil
+ g.cbOnError = nil
+ g.cbOnExit = nil
+ g.cbRead = nil
+ g.cbInferiorRead = nil
+
+ return nil
+}
+
+// Start sends a request to start remotely gdb within xds-server
+func (g *GdbXds) Start(inferiorTTY bool) (int, error) {
+ var body []byte
+ var err error
+
+ // Enable workaround about inferior output with gdbserver connection
+ // except if XDS_GDBSERVER_OUTPUT_NOFIX is defined
+ _, gdbserverNoFix := os.LookupEnv("XDS_GDBSERVER_OUTPUT_NOFIX")
+
+ args := apiv1.ExecArgs{
+ ID: g.prjID,
+ SdkID: g.sdkID,
+ Cmd: g.ccmd,
+ Args: g.aargs,
+ Env: g.eenv,
+ RPath: g.rPath,
+ TTY: inferiorTTY,
+ TTYGdbserverFix: !gdbserverNoFix,
+ CmdTimeout: -1, // no timeout, end when stdin close or command exited normally
+ }
+ body, err = json.Marshal(args)
+ if err != nil {
+ return int(syscallEBADE), err
+ }
+
+ g.log.Infof("POST %s/exec %v", g.uri, string(body))
+ var res *http.Response
+ var found bool
+ res, err = g.httpCli.HTTPPostWithRes("/exec", string(body))
+ if err != nil {
+ return int(syscall.EAGAIN), err
+ }
+ dRes := make(map[string]interface{})
+ json.Unmarshal(g.httpCli.ResponseToBArray(res), &dRes)
+ if _, found = dRes["cmdID"]; !found {
+ return int(syscallEBADE), err
+ }
+ g.cmdID = dRes["cmdID"].(string)
+
+ return 0, nil
+}
+
+// Cmd returns the command name
+func (g *GdbXds) Cmd() string {
+ return g.ccmd
+}
+
+// Args returns the list of arguments
+func (g *GdbXds) Args() []string {
+ return g.aargs
+}
+
+// Env returns the list of environment variables
+func (g *GdbXds) Env() []string {
+ return g.eenv
+}
+
+// OnError is called on a WebSocket error
+func (g *GdbXds) OnError(f func(error)) {
+ g.cbOnError = f
+}
+
+// OnDisconnect is called when WebSocket disconnection
+func (g *GdbXds) OnDisconnect(f func(error)) {
+ g.cbOnDisconnect = f
+}
+
+// OnExit calls when exit event is received
+func (g *GdbXds) OnExit(f func(code int, err error)) {
+ g.cbOnExit = f
+}
+
+// Read calls when a message/string event is received on stdout or stderr
+func (g *GdbXds) Read(f func(timestamp, stdout, stderr string)) {
+ g.cbRead = f
+}
+
+// InferiorRead calls when a message/string event is received on stdout or stderr of the debugged program (IOW inferior)
+func (g *GdbXds) InferiorRead(f func(timestamp, stdout, stderr string)) {
+ g.cbInferiorRead = f
+}
+
+// Write writes message/string into gdb stdin
+func (g *GdbXds) Write(args ...interface{}) error {
+ return g.ioSock.Emit(apiv1.ExecInEvent, args...)
+}
+
+// SendSignal is used to send a signal to remote process/gdb
+func (g *GdbXds) SendSignal(sig os.Signal) error {
+ var body []byte
+ body, err := json.Marshal(apiv1.ExecSignalArgs{
+ CmdID: g.cmdID,
+ Signal: sig.String(),
+ })
+ if err != nil {
+ g.log.Errorf(err.Error())
+ }
+ g.log.Debugf("POST /signal %s", string(body))
+ return g.httpCli.HTTPPost("/signal", string(body))
+}
+
+//***** Private functions *****
+
+func getProjectsList(c *common.HTTPClient, log *logrus.Logger, prjData []byte) (int, error) {
+
+ folders := xdsconfig.FoldersConfig{}
+ errMar := json.Unmarshal(prjData, &folders)
+ msg := ""
+ if errMar == nil {
+ msg += "List of existing projects (use: export XDS_PROJECT_ID=<< ID >>): \n"
+ msg += " ID\t\t\t\t | Label"
+ for _, f := range folders {
+ msg += fmt.Sprintf("\n %s\t | %s", f.ID, f.Label)
+ if f.DefaultSdk != "" {
+ msg += fmt.Sprintf("\t(default SDK: %s)", f.DefaultSdk)
+ }
+ }
+ msg += "\n"
+ }
+
+ var data []byte
+ if err := c.HTTPGet("/sdks", &data); err != nil {
+ return int(syscallEBADE), err
+ }
+ log.Infof("Result of /sdks: %v", string(data[:]))
+
+ sdks := []crosssdk.SDK{}
+ errMar = json.Unmarshal(data, &sdks)
+ if errMar == nil {
+ msg += "\nList of installed cross SDKs (use: export XDS_SDK_ID=<< ID >>): \n"
+ msg += " ID\t\t\t\t\t | NAME\n"
+ for _, s := range sdks {
+ msg += fmt.Sprintf(" %s\t | %s\n", s.ID, s.Name)
+ }
+ }
+
+ if len(folders) > 0 && len(sdks) > 0 {
+ msg += fmt.Sprintf("\n")
+ msg += fmt.Sprintf("For example: \n")
+ msg += fmt.Sprintf(" XDS_PROJECT_ID=%q XDS_SDK_ID=%q %s -x myGdbConf.ini\n",
+ folders[0].ID, sdks[0].ID, AppName)
+ }
+
+ return 0, fmt.Errorf(msg)
+}