Attachment 53766 Details for Bug 43165 – minimal sample program exercising the crash

minimal sample program exercising the crash

crashme.c (text/x-csrc), 2.35 KB, created by Christian Beier on 2011-11-22 05:15:43 UTC

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Creator: Christian Beier

Created: 2011-11-22 05:15:43 UTC

Size: 2.35 KB

patch

obsolete

>#include <X11/Xlib.h>
>#include <X11/extensions/XInput2.h> 
>#include <stdio.h>
>
>/*
>  simple X11 crasher.
>  build with:
>    
>    gcc -L/usr/X11R6/lib -lX11 -lXi crashme.c
>
>  run with
>
>    xwininfo | grep "Window id" | awk '{print $4}' | xargs ./a.out
> 
> */
>
>
>/*
>  create MD with given name
>  returns device id, -1 on error
>*/
>int createMD(Display* dpy, char* name)
>{
>  int dev_id = -1;
>  XIAddMasterInfo c;
>  XIDeviceInfo	*devinfo;
>  int		num_devices, i;
>  char handle[256]; /* device name */
>  snprintf(handle, 256, "%s pointer", name);
>
>  c.type = XIAddMaster;
>  c.name = name;
>  c.send_core = 1;
>  c.enable = 1;
>
>  XIChangeHierarchy(dpy, (XIAnyHierarchyChangeInfo*)&c, 1);
>  XSync(dpy, False);
>
>  /* find newly created dev by name
>     FIXME: better wait for XIHierarchy event here? */
>  devinfo = XIQueryDevice(dpy, XIAllMasterDevices, &num_devices);
>  for(i = num_devices-1; i >= 0; --i) 
>    if(strcmp(devinfo[i].name, handle) == 0)
>      {
>	dev_id = devinfo[i].deviceid;
>	break;
>      }
> 
>  XIFreeDeviceInfo(devinfo);
>
>  return dev_id;
>}
>
>
>
>/*
>  remove device 
>  return 1 on success, 0 on failure
>*/
>int removeMD(Display* dpy, int dev_id)
>{
>  int found = 0, res = 0;
>  XIDeviceInfo	*devinfo;
>  int		num_devices, i;
>
>  if(dev_id < 0)
>    return 0;
>
>  /* see if this device exists */
>  devinfo = XIQueryDevice(dpy, XIAllMasterDevices, &num_devices);
>  for(i = 0; i < num_devices; ++i)
>    if(devinfo[i].deviceid == dev_id)
>      found = 1;
>  XIFreeDeviceInfo(devinfo);
>
>  if(found) {
>    XIRemoveMasterInfo r;
>    /* actually remove device pair */
>    r.type = XIRemoveMaster;
>    r.deviceid = dev_id;
>    r.return_mode = XIFloating;
>
>    res = XIChangeHierarchy(dpy, (XIAnyHierarchyChangeInfo*)&r, 1) == Success ? 1 : 0;
>    XSync(dpy, False);
>  }
>
>  return res;
>}
>
>
>
>
>
>
>
>int main(int argc, char** argv) 
>{
>  Display *display = XOpenDisplay(NULL);
>  Window root = DefaultRootWindow(display); 
>  char* w_str = argv[1];
>  if(!w_str) {
>    printf("gimme a window id\n");
>    return -1;
>  }
>  int w_id = strtoul(w_str, NULL, 16);
>  printf("using window id 0x%x\n", w_id);
> 
>
>  printf("creating device\n");
>  int somenewMD = createMD(display, "bubu");
>  usleep(2000*1000);
>
>  printf("setting XI client pointer\n");
>  XISetClientPointer(display, w_id, somenewMD);
>  usleep(2000*1000);
>
>
>  printf("removing device\n");
>  removeMD(display, somenewMD);
>  usleep(2000*1000);
>   
> 
>  printf("bye!\n");
>  return 0;
>}

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Attachments on bug 43165: 53765 | 53766 | 53926

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