mieq: Backtrace when the queue overflows.
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
)
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@ -145,6 +145,7 @@ mieqEnqueue(DeviceIntPtr pDev, xEvent *e)
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oldtail = (oldtail - 1) % QUEUE_SIZE;
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}
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else {
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static int stuck = 0;
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newtail = (oldtail + 1) % QUEUE_SIZE;
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/* Toss events which come in late. Usually this means your server's
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* stuck in an infinite loop somewhere, but SIGIO is still getting
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@ -152,8 +153,13 @@ mieqEnqueue(DeviceIntPtr pDev, xEvent *e)
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if (newtail == miEventQueue.head) {
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ErrorF("[mi] EQ overflowing. The server is probably stuck "
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"in an infinite loop.\n");
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if (!stuck) {
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xorg_backtrace();
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stuck = 1;
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}
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return;
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}
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stuck = 0;
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miEventQueue.tail = newtail;
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}
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