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Add ptrace functions of job-control and signal

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Note that a forked process automatically becomes ptraced state in this
commit.
This commit is contained in:
Masamichi Takagi
2014-09-18 19:05:58 +09:00
committed by Tomoki Shirasawa
parent ab89de0de6
commit dbecaa2fc8
8 changed files with 632 additions and 170 deletions
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32
kernel/process.c
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@@ -84,15 +84,25 @@ void init_fork_tree_node(struct fork_tree_node *ftn,
/* These will be filled out when changing status */
ftn->pid = -1;
ftn->exit_status = -1;
ftn->group_exit_status = 0;
ftn->status = PS_RUNNING;
#if 1
ftn->ptrace = parent ? PT_TRACED : 0; /*debug*//*takagi*/
#endif
ftn->signal_flags = 0;
ftn->parent = NULL;
if (parent) {
ftn->parent = parent;
}
INIT_LIST_HEAD(&ftn->children);
INIT_LIST_HEAD(&ftn->siblings_list);
if (parent) {
ftn->ppid_parent = parent; /*debug*//*takagi*/
}
INIT_LIST_HEAD(&ftn->ptrace_children);
INIT_LIST_HEAD(&ftn->ptrace_siblings_list);
waitq_init(&ftn->waitpid_q);
}
@@ -287,6 +297,12 @@ struct process *clone_process(struct process *org, unsigned long pc,
list_add_tail(&proc->ftn->siblings_list, &org->ftn->children);
ihk_mc_spinlock_unlock_noirq(&org->ftn->lock);
/*takagi*//*debug*/
#if 1
ihk_mc_spinlock_lock_noirq(&org->ftn->lock);
list_add_tail(&proc->ftn->ptrace_siblings_list, &org->ftn->ptrace_children);
ihk_mc_spinlock_unlock_noirq(&org->ftn->lock);
#endif
/* We hold a reference to parent */
hold_fork_tree_node(proc->ftn->parent);
@@ -1927,10 +1943,10 @@ redo:
void check_need_resched(void)
{
struct cpu_local_var *v = get_this_cpu_local_var();
if (v->flags & CPU_FLAG_NEED_RESCHED) {
if (v->flags & CPU_FLAG_NEED_RESCHED) {
v->flags &= ~CPU_FLAG_NEED_RESCHED;
schedule();
}
}
}
@@ -1940,11 +1956,14 @@ int sched_wakeup_process(struct process *proc, int valid_states)
int spin_slept = 0;
unsigned long irqstate;
struct cpu_local_var *v = get_cpu_local_var(proc->cpu_id);
dkprintf("sched_wakeup_process,proc->pid=%d,valid_states=%08x,proc->status=%08x,proc->cpu_id=%d,my cpu_id=%d\n",
proc->pid, valid_states, proc->status, proc->cpu_id, ihk_mc_get_processor_id());
irqstate = ihk_mc_spinlock_lock(&(proc->spin_sleep_lock));
if (proc->spin_sleep) {
dkprintf("sched_wakeup_process() spin wakeup: cpu_id: %d\n",
proc->cpu_id);
proc->cpu_id);
spin_slept = 1;
proc->spin_sleep = 0;
@@ -1952,8 +1971,9 @@ int sched_wakeup_process(struct process *proc, int valid_states)
}
ihk_mc_spinlock_unlock(&(proc->spin_sleep_lock), irqstate);
if (spin_slept)
if (spin_slept) {
return status;
}
irqstate = ihk_mc_spinlock_lock(&(v->runq_lock));
@@ -1968,6 +1988,8 @@ int sched_wakeup_process(struct process *proc, int valid_states)
ihk_mc_spinlock_unlock(&(v->runq_lock), irqstate);
if (!status && (proc->cpu_id != ihk_mc_get_processor_id())) {
dkprintf("sched_wakeup_process,issuing IPI,proc->cpu_id=%d\n",
proc->cpu_id);
ihk_mc_interrupt_cpu(get_x86_cpu_local_variable(proc->cpu_id)->apic_id,
0xd1);
}