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 -1; 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 -1; 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 extern "C" int __lsan_is_turned_off() { return 1; } 115 #endif 116
