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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 // | |
5 // This is a small program that tries to connect to the X server. It | |
6 // continually retries until it connects or 30 seconds pass. If it fails | |
7 // to connect to the X server or fails to find needed functiona, it returns | |
8 // an error code of -1. | |
9 // | |
10 // This is to help verify that a useful X server is available before we start | |
11 // start running tests on the build bots. | |
12 | |
13 #include <errno.h> | |
14 #include <stdio.h> | |
15 #include <string.h> | |
16 #include <time.h> | |
17 #include <X11/Xlib.h> | |
18 | |
19 #if defined(USE_AURA) | |
20 #include <X11/extensions/XInput2.h> | |
21 #endif | |
22 | |
23 void Sleep(int duration_ms) { | |
24 struct timespec sleep_time, remaining; | |
25 | |
26 // Contains the portion of duration_ms >= 1 sec. | |
27 sleep_time.tv_sec = duration_ms / 1000; | |
28 duration_ms -= sleep_time.tv_sec * 1000; | |
29 | |
30 // Contains the portion of duration_ms < 1 sec. | |
31 sleep_time.tv_nsec = duration_ms * 1000 * 1000; // nanoseconds. | |
32 | |
33 while (nanosleep(&sleep_time, &remaining) == -1 && errno == EINTR) | |
34 sleep_time = remaining; | |
35 } | |
36 | |
37 class XScopedDisplay { | |
38 public: | |
39 XScopedDisplay() : display_(NULL) {} | |
40 ~XScopedDisplay() { | |
41 if (display_) XCloseDisplay(display_); | |
42 } | |
43 | |
44 void set(Display* display) { display_ = display; } | |
45 Display* display() { return display_; } | |
46 | |
47 private: | |
48 Display* display_; | |
49 }; | |
50 | |
51 int main(int argc, char* argv[]) { | |
52 XScopedDisplay scoped_display; | |
53 if (argv[1] && strcmp(argv[1], "--noserver") == 0) { | |
54 scoped_display.set(XOpenDisplay(NULL)); | |
55 if (scoped_display.display()) { | |
56 fprintf(stderr, "Found unexpected connectable display %s\n", | |
57 XDisplayName(NULL)); | |
58 } | |
59 // Return success when we got an unexpected display so that the code | |
60 // without the --noserver is the same, but slow, rather than inverted. | |
61 return !scoped_display.display(); | |
62 } | |
63 | |
64 int kNumTries = 78; // 78*77/2 * 10 = 30s of waiting | |
65 int tries; | |
66 for (tries = 0; tries < kNumTries; ++tries) { | |
67 scoped_display.set(XOpenDisplay(NULL)); | |
68 if (scoped_display.display()) | |
69 break; | |
70 Sleep(10 * tries); | |
71 } | |
72 | |
73 if (!scoped_display.display()) { | |
74 fprintf(stderr, "Failed to connect to %s\n", XDisplayName(NULL)); | |
75 return -1; | |
76 } | |
77 | |
78 fprintf(stderr, "Connected after %d retries\n", tries); | |
79 | |
80 #if defined(USE_AURA) | |
81 // Check for XInput2 | |
82 int opcode, event, err; | |
83 if (!XQueryExtension(scoped_display.display(), "XInputExtension", &opcode, | |
84 &event, &err)) { | |
85 fprintf(stderr, | |
86 "Failed to get XInputExtension on %s.\n", XDisplayName(NULL)); | |
87 return -2; | |
88 } | |
89 | |
90 int major = 2, minor = 0; | |
91 if (XIQueryVersion(scoped_display.display(), &major, &minor) == BadRequest) { | |
92 fprintf(stderr, | |
93 "Server does not have XInput2 on %s.\n", XDisplayName(NULL)); | |
94 return -3; | |
95 } | |
96 | |
97 // Ask for the list of devices. This can cause some Xvfb to crash. | |
98 int count = 0; | |
99 XIDeviceInfo* devices = | |
100 XIQueryDevice(scoped_display.display(), XIAllDevices, &count); | |
101 if (devices) | |
102 XIFreeDeviceInfo(devices); | |
103 | |
104 fprintf(stderr, | |
105 "XInput2 verified initially sane on %s.\n", XDisplayName(NULL)); | |
106 #endif | |
107 return 0; | |
108 } | |
109 | |
110 #if defined(LEAK_SANITIZER) | |
111 // XOpenDisplay leaks memory if it takes more than one try to connect. This | |
112 // causes LSan bots to fail. We don't care about memory leaks in xdisplaycheck | |
113 // anyway, so just disable LSan completely. | |
114 // This function isn't referenced from the executable itself. Make sure it isn't | |
115 // stripped by the linker. | |
116 __attribute__((used)) | |
117 __attribute__((visibility("default"))) | |
118 extern "C" int __lsan_is_turned_off() { return 1; } | |
119 #endif | |
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