Attachment 88996 Details for Bug 71338 – Reproducer

Reproducer

xdraw.c (text/plain), 1.98 KB, created by alexander.elbs on 2013-11-11 08:29:48 UTC

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Creator: alexander.elbs

Created: 2013-11-11 08:29:48 UTC

Size: 1.98 KB

patch

obsolete

>#include <X11/Xlib.h> // Every Xlib program must include this
>#include <assert.h>   // I include this to test return values the lazy way
>#include <unistd.h>   // So we got the profile for 10 seconds
>#include <stdio.h>
>#include <stdlib.h>
>#include <execinfo.h>
>
>#define NIL (0)       // A name for the void pointer
>
>void printBacktrace() {
>  int j, nptrs;
>#define SIZE 100
>  void *buffer[100];
>  char **strings;
>
>  nptrs = backtrace(buffer, SIZE);
>  printf("backtrace() returned %d addresses\n", nptrs);
>
>   /* The call backtrace_symbols_fd(buffer, nptrs, STDOUT_FILENO)
>       would produce similar output to the following: */
>
>  strings = backtrace_symbols(buffer, nptrs);
>  if (strings == NULL) {
>    perror("backtrace_symbols");
>    exit(EXIT_FAILURE);
>  }
>
>  for (j = 0; j < nptrs; j++)
>    printf("%s\n", strings[j]);
>
>  free(strings);
>}
>
>int myIOXError(Display *disp)
>{
>  printf("ERROR Received a X IO error on display=%x.\n", disp);
>  printBacktrace();
>  return True;
>}
>
>main() {
>  Display *dpy = XOpenDisplay(NIL);
>  assert(dpy);
>
>  int blackColor = BlackPixel(dpy, DefaultScreen(dpy));
>  int whiteColor = WhitePixel(dpy, DefaultScreen(dpy));
>
>  // Create the window
>  Window w = XCreateSimpleWindow(dpy, DefaultRootWindow(dpy), 0, 0,
>                                 200, 100, 0, blackColor, blackColor);
>
>  // We want to get MapNotify events
>  XSelectInput(dpy, w, StructureNotifyMask);
>
>  // "Map" the window (that is, make it appear on the screen)
>  XMapWindow(dpy, w);
>
>  // Create a "Graphics Context"
>  GC gc = XCreateGC(dpy, w, 0, NIL);
>
>  // Tell the GC we draw using the white color
>  XSetForeground(dpy, gc, whiteColor);
>
>  // register io error handler
>  XSetIOErrorHandler(myIOXError);
>
>  // Wait for the MapNotify event
>  for(;;) {
>    XEvent e;
>    XNextEvent(dpy, &e);
>    if (e.type == MapNotify)
>      break;
>  }
>
>  // Draw the line
>  for(;;) {
>    XDrawLine(dpy, w, gc, 10, 60, 180, 20);
>    // Send the "DrawLine" request to the server
>    XFlush(dpy);
>  }
>
>  // Wait for 10 seconds
>  sleep(10);
>}

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Attachments on bug 71338: 88996 | 89001 | 89026

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