aboutsummaryrefslogtreecommitdiffstats
path: root/gdb-xds.go
blob: d57817d9ea6720cf61ae2c8d61200bba6ecfd0a0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
/*
 * Copyright (C) 2017 "IoT.bzh"
 * Author Sebastien Douheret <sebastien@iot.bzh>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package main

import (
	"encoding/json"
	"fmt"
	"os"
	"regexp"
	"strconv"
	"strings"
	"syscall"

	"github.com/Sirupsen/logrus"
	"github.com/iotbzh/xds-agent/lib/xaapiv1"
	common "github.com/iotbzh/xds-common/golib"
	sio_client "github.com/sebd71/go-socket.io-client"
)

// GdbXds - Implementation of IGDB used to interfacing XDS
type GdbXds struct {
	log       *logrus.Logger
	ccmd      string
	aargs     []string
	eenv      []string
	agentURL  string
	serverURL string
	prjID     string
	sdkID     string
	rPath     string
	listPrj   bool
	cmdID     string
	xGdbPid   string

	httpCli *common.HTTPClient
	ioSock  *sio_client.Client

	projects []xaapiv1.ProjectConfig

	// 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:    "exec $GDB", // var set by environment-setup-xxx script
		aargs:   args,
		eenv:    env,
		httpCli: nil,
		ioSock:  nil,
		xGdbPid: strconv.Itoa(os.Getpid()),
	}
}

// SetConfig set additional config fields
func (g *GdbXds) SetConfig(name string, value interface{}) error {
	switch name {
	case "agentURL":
		g.agentURL = value.(string)
	case "serverURL":
		g.serverURL = 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) {

	// Reset command ID (also used to enable sending of signals)
	g.cmdID = ""

	// Define HTTP and WS url
	baseURL := g.agentURL

	// Allow to only set port number
	if match, _ := regexp.MatchString("^([0-9]+)$", baseURL); match {
		baseURL = "http://localhost:" + g.agentURL
	}
	// Add http prefix if missing
	if baseURL != "" && !strings.HasPrefix(g.agentURL, "http://") {
		baseURL = "http://" + g.agentURL
	}

	// Create HTTP client
	g.log.Infoln("Connect HTTP client on ", baseURL)
	conf := common.HTTPClientConfig{
		URLPrefix:           "/api/v1",
		HeaderClientKeyName: "Xds-Agent-Sid",
		CsrfDisable:         true,
		LogOut:              g.log.Out,
		LogLevel:            common.HTTPLogLevelWarning,
	}
	c, err := common.HTTPNewClient(baseURL, conf)
	if err != nil {
		errmsg := err.Error()
		if m, err := regexp.MatchString("Get http.?://", errmsg); m && err == nil {
			i := strings.LastIndex(errmsg, ":")
			errmsg = "Cannot connection to " + baseURL + errmsg[i:]
		}
		return int(syscallEBADE), fmt.Errorf(errmsg)
	}
	g.httpCli = c
	g.httpCli.SetLogLevel(g.log.Level.String())
	g.log.Infoln("HTTP session ID:", g.httpCli.GetClientID())

	// First call to check that xds-agent and server are alive
	ver := xaapiv1.XDSVersion{}
	if err := g.httpCli.Get("/version", &ver); err != nil {
		return int(syscallEBADE), err
	}
	g.log.Infoln("XDS agent & server version:", ver)

	// Get current config and update connection to server when needed
	xdsConf := xaapiv1.APIConfig{}
	if err := g.httpCli.Get("/config", &xdsConf); err != nil {
		return int(syscallEBADE), err
	}
	// FIXME: add multi-servers support
	idx := 0
	svrCfg := xdsConf.Servers[idx]
	if g.serverURL != "" && (svrCfg.URL != g.serverURL || !svrCfg.Connected) {
		svrCfg.URL = g.serverURL
		svrCfg.ConnRetry = 10
		newCfg := xaapiv1.APIConfig{}
		if err := g.httpCli.Post("/config", xdsConf, &newCfg); err != nil {
			return int(syscallEBADE), err
		}

	} else if !svrCfg.Connected {
		return int(syscallEBADE), fmt.Errorf("XDS server not connected (url=%s)", svrCfg.URL)
	}

	// Get XDS projects list
	var data []byte
	if err := g.httpCli.HTTPGet("/projects", &data); err != nil {
		return int(syscallEBADE), err
	}

	g.log.Infof("Result of /projects: %v", string(data[:]))
	g.projects = []xaapiv1.ProjectConfig{}
	errMar := json.Unmarshal(data, &g.projects)
	if errMar != nil {
		g.log.Errorf("Cannot decode projects configuration: %s", errMar.Error())
	}

	// Check mandatory args
	if g.prjID == "" || g.listPrj {
		return g.printProjectsList()
	}

	// 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-AGENT-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)
		}
	})

	// SEB gdbPid := ""
	iosk.On(xaapiv1.ExecOutEvent, func(ev xaapiv1.ExecOutMsg) {
		if g.cbRead != nil {
			g.cbRead(ev.Timestamp, ev.Stdout, ev.Stderr)
			/*
				stdout := ev.Stdout
				// SEB
				//New Thread 15139
				if strings.Contains(stdout, "pid = ") {
					re := regexp.MustCompile("pid = ([0-9]+)")
					if res := re.FindAllStringSubmatch(stdout, -1); len(res) > 0 {
						gdbPid = res[0][1]
					}
					g.log.Errorf("SEB FOUND THREAD in '%s' => gdbPid=%s", stdout, gdbPid)
				}
				if gdbPid != "" && g.xGdbPid != "" && strings.Contains(stdout, gdbPid) {
					g.log.Errorf("SEB THREAD REPLACE 1 stdout=%s", stdout)
					stdout = strings.Replace(stdout, gdbPid, g.xGdbPid, -1)
					g.log.Errorf("SEB THREAD REPLACE 2 stdout=%s", stdout)
				}

				g.cbRead(ev.Timestamp, stdout, ev.Stderr)
			*/
		}
	})

	iosk.On(xaapiv1.ExecInferiorOutEvent, func(ev xaapiv1.ExecOutMsg) {
		if g.cbInferiorRead != nil {
			g.cbInferiorRead(ev.Timestamp, ev.Stdout, ev.Stderr)
		}
	})

	iosk.On(xaapiv1.ExecExitEvent, func(ev xaapiv1.ExecExitMsg) {
		if g.cbOnExit != nil {
			g.cbOnExit(ev.Code, ev.Error)
		}
	})

	return 0, nil
}

// Close frees allocated objects and close opened connections
func (g *GdbXds) Close() error {
	g.cbOnDisconnect = nil
	g.cbOnError = nil
	g.cbOnExit = nil
	g.cbRead = nil
	g.cbInferiorRead = nil
	g.cmdID = ""

	return nil
}

// Start sends a request to start remotely gdb within xds-server
func (g *GdbXds) Start(inferiorTTY bool) (int, error) {
	var err error
	var project *xaapiv1.ProjectConfig

	// Retrieve the project definition
	for _, f := range g.projects {
		// check as prefix to support short/partial id name
		if strings.HasPrefix(f.ID, g.prjID) {
			project = &f
			break
		}
	}

	// Auto setup rPath if needed
	if g.rPath == "" && project != nil {
		cwd, err := os.Getwd()
		if err == nil {
			fldRp := project.ClientPath
			if !strings.HasPrefix(fldRp, "/") {
				fldRp = "/" + fldRp
			}
			log.Debugf("Try to auto-setup rPath: cwd=%s ; ClientPath=%s", cwd, fldRp)
			if sp := strings.SplitAfter(cwd, fldRp); len(sp) == 2 {
				g.rPath = strings.Trim(sp[1], "/")
				g.log.Debugf("Auto-setup rPath to: '%s'", g.rPath)
			}
		}
	}

	// Enable workaround about inferior output with gdbserver connection
	// except if XDS_GDBSERVER_OUTPUT_NOFIX is defined
	_, gdbserverNoFix := os.LookupEnv("XDS_GDBSERVER_OUTPUT_NOFIX")

	args := xaapiv1.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
	}

	g.log.Infof("POST %s/exec %v", g.agentURL, args)
	res := xaapiv1.ExecResult{}
	err = g.httpCli.Post("/exec", args, &res)
	if err != nil {
		return int(syscall.EAGAIN), err
	}
	if res.CmdID == "" {
		return int(syscallEBADE), fmt.Errorf("null CmdID")
	}
	g.cmdID = res.CmdID

	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(xaapiv1.ExecInEvent, args...)
}

// SendSignal is used to send a signal to remote process/gdb
func (g *GdbXds) SendSignal(sig os.Signal) error {
	if g.cmdID == "" {
		return fmt.Errorf("cmdID not set")
	}

	sigArg := xaapiv1.ExecSignalArgs{
		CmdID:  g.cmdID,
		Signal: sig.String(),
	}
	g.log.Debugf("POST /signal %v", sigArg)
	return g.httpCli.Post("/signal", sigArg, nil)
}

//***** Private functions *****

func (g *GdbXds) printProjectsList() (int, error) {
	msg := ""
	if len(g.projects) > 0 {
		msg += "List of existing projects (use: export XDS_PROJECT_ID=<< ID >>): \n"
		msg += "  ID\t\t\t\t | Label"
		for _, f := range g.projects {
			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"
	}

	// FIXME : support multiple servers
	sdks := []xaapiv1.SDK{}
	if err := g.httpCli.Get("/servers/0/sdks", &sdks); err != nil {
		return int(syscallEBADE), err
	}
	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(g.projects) > 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",
			g.projects[0].ID, sdks[0].ID, AppName)
	}

	return 0, fmt.Errorf(msg)
}