Attachment 870208 Details for Bug 1216261

poc.c

poc.c (text/plain), 4.56 KB, created by Marcus Meissner on 2023-10-16 08:19:19 UTC

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Creator: Marcus Meissner

Created: 2023-10-16 08:19:19 UTC

Size: 4.56 KB

patch

obsolete

>#include <X11/IntrinsicP.h>
>#include <X11/ConstrainP.h>
>#include <X11/Core.h>
>#include <X11/CoreP.h>
>#include <X11/RectObj.h>
>#include <X11/Shell.h>
>#include <X11/StringDefs.h>
>
>#include <X11/Xaw/Box.h>
>#include <X11/Xaw/Text.h>
>#include <X11/Xaw/AsciiText.h>
>#include <X11/Xaw/Viewport.h>
>#include <X11/Xaw/Form.h>
>#include <X11/Xaw/Paned.h>
>#include <X11/Xaw/Command.h>
>#include <X11/Xaw/Label.h>
>#include <X11/Xaw/SimpleMenu.h>
>#include <X11/Xaw/Box.h>
>
>#include <sys/types.h>
>#include <limits.h>
>#include <errno.h>
>#include <stdio.h>
>#include <unistd.h>
>#include <stdlib.h>
>#include <sys/stat.h>
>#include <sys/wait.h>
>#include <signal.h>
>#include <string.h>
>#include <sys/wait.h>
>#include <errno.h>
>#include <sys/ipc.h>
>#include <sys/sem.h>
>#include <ctype.h>
>
>XtAppContext app_ctext;
>
>static void analyse_events5(Widget w)
>{
>    XtAppContext app_context;
>    Display *display;
>    XEvent loop_event;
>    int ret_value;
>    int gflag = 0;
>    Window window;
>    app_context = XtWidgetToApplicationContext(w);
>    display = XtDisplay(w);
>    window = XtWindow(w); /* The target window matters somehow */
>    for (;;)
>    {
>        XtAppNextEvent(app_context, &loop_event);
>#if 1
>        if (loop_event.type == Expose)
>        {
>            if (gflag == 0)
>            {
>              /*
>               * Best guess: we start with the pointer on screen 0, moving the
>               * pointer to screen 1 triggers *something* that causes the bug,
>               * eventually.
>               *
>               * We move to screen 1 because that's what our app is displaying
>               * on and we use that window as target window.
>               *
>               * Can also be reproduced with:
>               * $ export DISPLAY=3.1
>               * $ xcalc 
>               * $ xdotool mousemove --screen 1 10 10
>               * $ killall xcalc
>               *
>               */
>              XWarpPointer(display, None, window, 10, 10, 0, 0, 10, 10);
>              gflag = 1;
>            }
>        }
>#endif
>        XSync(display, False);
>        XtDispatchEvent(&loop_event);
>    }
>}
>
>Widget avs_xt_init(char *string, char *argvector[], int argcount)
>{
>	char app_class[4096]; 
>	XtAppContext app_context;
>	Display *display;
>	Widget root_widget;
>	int	i;
>
>	int x_origin, y_origin;		/* x, y origin of widget */
>	int width, height;		/* height and width of widget */
>
>	int DisplayWidthInPix;		/* Number of display width pixels */
>	int DisplayHeightInPix;		/* Number of display height pixels */
>	int DisplayWidthInMM;		/* display width in mm */
>	int PixelPerCM;			/* number of pixels in cms */
>
>	XtToolkitInitialize();
>
>	app_context = XtCreateApplicationContext();
>
>	strcpy(app_class, string);
>
>        display = XtOpenDisplay(
>                app_context,		/* application context */
>                NULL,	                /* display name */
>                "VSW5 X Toolkit Tests",	/*application name*/
>                app_class,		/* application class */
>                NULL,/* command line options */
>                (Cardinal)0,		/* num command line options */
>                &argcount,
>                argvector		/* command line args */
>                );
>
>	if (!display)
>		exit(0);
>
>	XResetScreenSaver(display);
>
>	root_widget = XtVaAppCreateShell(
>		(String)NULL,		   	/*application name use argv[0]*/
>		app_class,		  	/* application class */
>		applicationShellWidgetClass, 	/* widget class */
>		display,			/* display struct */
>		XtNx, 2,
>		XtNy, 2,
>		XtNwidth, 640,
>		XtNheight, 480,
>		NULL
>		);
>
>	return(root_widget);
>}
>
>Widget avs_xt_hier(char *stitle)
>{
>    Widget topLevel = (Widget)avs_xt_init(stitle, NULL, 0);
>    app_ctext = XtWidgetToApplicationContext(topLevel);
>
>    // Original PoC had a complex hierarchy but turns out we only need two
>    // widgets: the paned and some content so it's not zero sized.
>    //
>    // Skipping the paned one made the bug disappear, so that's the only one
>    // left now.
>    //
>    Widget panedw = XtVaCreateManagedWidget(
>        "panedw",         /* arbitrary widget name */
>        panedWidgetClass, /* widget class  */
>        topLevel,                /* parent widget */
>        NULL              /* terminate list */
>    );
>
>    // We need some content for the pane to avoid zero-sized complaints
>    Widget labelw = XtVaCreateManagedWidget(
>        "whatever",       /* arbitrary widget name */
>        labelWidgetClass, /* widget class  */
>        panedw,                /* parent widget */
>        NULL              /* terminate list */
>    );
>
>    return topLevel;
>}
>
>int main(void)
>{
>    Widget topLevel = avs_xt_hier("Tstkbfocs5");
>    XtRealizeWidget(topLevel);
>    analyse_events5(topLevel);
>
>    return 0;
>}

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Attachments on bug 1216261: 870206 | 870207 | 870208 | 870426