Attachment 26950 Details for Bug 22362 – simple test-case demonstrating the deadlock.

simple test-case demonstrating the deadlock.

handoff-test.c (text/plain), 3.60 KB, created by Clemens Eisserer on 2009-06-19 01:39:40 UTC

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Creator: Clemens Eisserer

Created: 2009-06-19 01:39:40 UTC

Size: 3.60 KB

patch

obsolete

>#include <stdio.h>
>#include <X11/Xlib.h>
>#include <X11/extensions/Xrender.h>
>#include <X11/extensions/render.h>
>#include <stdlib.h>
>#include <math.h>
>#include <stdlib.h>
>#include <sys/time.h>
>
>#include <xcb/xcb.h>
>#include <X11/Xlib-xcb.h>
>
>#include <sys/uio.h>
>
>Display *display;
>int screen;
>Window root, window;
>XEvent event;
>
>int RENDER;
>
>
>int fillRect(Picture dst, char* data) {
>        unsigned int* req_i = (unsigned int*) data;
>        unsigned short* req_s = (unsigned short*) data;
>        unsigned char* req_b = (unsigned char*) data;
>        
>	/*Compiler's nightmare ;) */
>        req_b[0] = RENDER;
>        req_b[1] = 26; //FillRectangles-Opcode
>        req_s[1] = 9;  //Request-length
>
>        req_b[4] = 3; //Over
>        
>        req_i[2] = dst; 
>
>        req_s[6] = 0xffff; //green
>        req_s[7] = 0xffff; //Red
>        req_s[8] = 0;      //Blue
>        req_s[9] = 0xffff; //A
>
>        req_s[10] = 100;
>        req_s[11] = 100;
>        req_s[12] = 20;
>        req_s[13] = 20;
>
>        req_s[14] = 120;
>        req_s[15] = 120;
>        req_s[16] = 10;
>        req_s[17] = 10;
>
>        return 36;
>}
>
>static void return_socket(void *closure)
>{ }
>
>
>void testLoop(xcb_connection_t *con, char* buffer, Picture picture) 
>{
>  XRenderColor color_white = {.red=0xffff, .green=0xffff, .blue=0xffff, .alpha=0xffff};
>
>  int z;  //The higher the iteration count, the sooner (more likely?) it happens
>  for(z=0; z < 1000; z++)  {
>
>       /*Use a C based function*/ 
>       XRenderFillRectangle(display, PictOpOver, picture, &color_white, 0, 0, 1, 1);
>
>       /*Grab the socket*/
>       int flags = 0;
>       uint64_t sent;
>       int ret = xcb_take_socket(con, &return_socket, &flags, 0, &sent);
>
>       /*Produce self-generated protocol*/
>       int requests = 0;
>       int written = 0;
>       for(requests = 0; requests < 770; requests++) {  //770 self-generated requests cause xcb to hang, 769 work perfectly.
>         written += fillRect(picture, &buffer[written]);
>       }
>
>       /*Write self-generated protocol*/
>       struct iovec vect;
>       vect.iov_base = buffer;
>       vect.iov_len = written;
>       xcb_writev(con, &vect, 1, requests);
>  }
>}
>
>int main(int argc, char *argv[])
>{
>        /*Bosing initialization stuff*/
>	display=XOpenDisplay(NULL);
>	
>	int render_event_base, render_error_base;
>	int render_present=XRenderQueryExtension(display, &render_event_base, &render_error_base);
>	if (!render_present) {
>		fprintf(stderr, "RENDER extension missing!\n");
>		abort();
>	}
>	
>	XRenderPictFormat *fmt=XRenderFindStandardFormat(display, PictStandardRGB24);
>	screen=DefaultScreen(display);
>	root=DefaultRootWindow(display);
>	
>	window = XCreateWindow(display, root, 0, 0, 640, 480, 0,
>		DefaultDepth(display, screen), InputOutput,
>		DefaultVisual(display, screen), 
>		0, NULL);
>	XRenderPictureAttributes pict_attr;
>	
>	pict_attr.poly_edge=PolyEdgeSmooth;
>	pict_attr.poly_mode=PolyModeImprecise;
>	Picture picture=XRenderCreatePicture(display, window, fmt, CPPolyEdge|CPPolyMode, &pict_attr);
>	
>	XSelectInput(display, window, KeyPressMask|KeyReleaseMask|ExposureMask
>		|ButtonPressMask|StructureNotifyMask);
>	
>	
>	/* now make the window visible */
>	XMapWindow(display, window);
>	
>
>       /*Fetch the RENDER extension's opcode*/
>       char renderName[] = RENDER_NAME;
>       int x;
>       XQueryExtension(display, renderName , &RENDER, &x, &x);
>
>       xcb_connection_t* con = XGetXCBConnection(display);
>
>       char* buffer = (char*) malloc(512000);
>
>	while(1) {
>		XNextEvent(display, &event);
>		
>		switch(event.type) {
>			case Expose:
>{
>                          testLoop(con, buffer, picture);
>
>				break;
>			case DestroyNotify:
>				return 0;
>		}
>	}
>	
>}
>	return 0;
>}

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Attachments on bug 22362: 26950

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