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-rw-r--r--kernel/proc.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/kernel/proc.c b/kernel/proc.c
index 3d215a5..9a9bae9 100644
--- a/kernel/proc.c
+++ b/kernel/proc.c
@@ -39,6 +39,7 @@ proc_mapstacks(pagetable_t kpgtbl)
if(pa == 0)
panic("kalloc");
uint64 va = KSTACK((int) (p - proc));
+ p->alarm_tickspassed = 0;
kvmmap(kpgtbl, va, (uint64)pa, PGSIZE, PTE_R | PTE_W);
}
}
@@ -140,6 +141,17 @@ found:
}
p->usyscall->pid = p->pid;
+ // reset sigalarm props
+ p->alarm_interval = 0;
+ p->alarm_handler = 0;
+ p->alarm_tickspassed = 0;
+ p->alarm_caninvoke = 1;
+ if((p->atpfm = (struct trapframe *)kalloc()) == 0){
+ freeproc(p);
+ release(&p->lock);
+ return 0;
+ }
+
// An empty user page table.
p->pagetable = proc_pagetable(p);
if(p->pagetable == 0){
@@ -171,6 +183,13 @@ freeproc(struct proc *p)
p->usyscall = 0;
if(p->pagetable)
proc_freepagetable(p->pagetable, p->sz);
+ if(p->atpfm)
+ kfree((void*)p->atpfm);
+ p->atpfm = 0;
+ p->alarm_interval = 0;
+ p->alarm_handler = 0;
+ p->alarm_tickspassed = 0;
+ p->alarm_caninvoke = 1;
p->pagetable = 0;
p->sz = 0;
p->pid = 0;