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mieq: Backtrace when the queue overflows.

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Since we're probably stuck down in a driver somewhere, let's at least
try to point out where.  This will need to be rethought when the input
thread work lands though.
(cherry picked from commit b736f477f5)
This commit is contained in:
Adam Jackson 2008-10-10 16:33:24 -04:00
parent 7df5e93cf5
commit 483fb847b4
1 changed files with 6 additions and 0 deletions
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6
mi/mieq.c
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@ -145,6 +145,7 @@ mieqEnqueue(DeviceIntPtr pDev, xEvent *e)
oldtail = (oldtail - 1) % QUEUE_SIZE;
}
else {
static int stuck = 0;
newtail = (oldtail + 1) % QUEUE_SIZE;
/* Toss events which come in late. Usually this means your server's
* stuck in an infinite loop somewhere, but SIGIO is still getting
@ -152,8 +153,13 @@ mieqEnqueue(DeviceIntPtr pDev, xEvent *e)
if (newtail == miEventQueue.head) {
ErrorF("[mi] EQ overflowing. The server is probably stuck "
"in an infinite loop.\n");
if (!stuck) {
xorg_backtrace();
stuck = 1;
}
return;
}
stuck = 0;
miEventQueue.tail = newtail;
}