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check cp->killed before returning to user from a timer interrupt

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kolya 2008-10-15 04:57:02 +00:00
parent 00ce31c09c
commit 15ce79de14
1 changed files with 4 additions and 0 deletions
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4
trap.c
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@ -91,4 +91,8 @@ trap(struct trapframe *tf)
// If interrupts were on while locks held, would need to check nlock. // If interrupts were on while locks held, would need to check nlock.
if(cp && cp->state == RUNNING && tf->trapno == IRQ_OFFSET+IRQ_TIMER) if(cp && cp->state == RUNNING && tf->trapno == IRQ_OFFSET+IRQ_TIMER)
yield(); yield();
// Check if the process has been killed since we yielded
if(cp && cp->killed && (tf->cs&3) == DPL_USER)
exit();
} }