/* wedge.c - reproduce the 2026-10-14 hang's first half on purpose: take the card, start
 * an IDUMP of a 320x240 frame, read part of it, then die by SIGKILL mid-stream.
 * Claude Opus 5.5, 2026-10-14. Run only with X (and dtlogin) stopped. */
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include "mga.h"
#include "tex3d.h"
int main(void)
{
    static unsigned int buf[2000];
    volatile unsigned int *win;
    int i;
    if (t3_open(320, 240)) return 1;
    t3_clear(0x18c3);
    t3_finish();
    /* t3_read's setup, without its read loop */
    mga_fifo(7);
    mga_out(DWGCTL, 0x0000000a | SGNZERO | SHFTZERO | BOP_COPY | 0x0e000000);
    mga_out(AR5, 512); mga_out(AR3, 0); mga_out(AR0, 319);
    mga_out(FXBNDRY, 319 << 16);
    mga_out(YDSTLEN + GO, 240);
    win = (volatile unsigned int *) mga_base;
    for (i = 0; i < 2000; i++) buf[i] = win[i % 1792];      /* 2000 of 38400 dwords */
    printf("read 2000 dwords (first 0x%08x); STATUS 0x%08x; killing myself\n", buf[0], mga_in(STATUS));
    fflush(stdout);
    kill(getpid(), SIGKILL);
    return 0;
}