C++ perf_event_fork函数代码示例

OStack程序员社区-中国程序员成长平台 › 门户 › 编程› C++›C++教程

原作者: [db:作者] 来自: [db:来源] 收藏邀请

本文整理汇总了C++中perf_event_fork函数的典型用法代码示例。如果您正苦于以下问题：C++ perf_event_fork函数的具体用法？C++ perf_event_fork怎么用？C++ perf_event_fork使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了perf_event_fork函数的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: ERR_PTR


//.........这里部分代码省略.........
     * Process group and session signals need to be delivered to just the
     * parent before the fork or both the parent and the child after the
     * fork. Restart if a signal comes in before we add the new process to
     * it's process group.
     * A fatal signal pending means that current will exit, so the new
     * thread can't slip out of an OOM kill (or normal SIGKILL).
     */
    recalc_sigpending();
    if (signal_pending(current)) {
        spin_unlock(&current->sighand->siglock);
        write_unlock_irq(&tasklist_lock);
        retval = -ERESTARTNOINTR;
        goto bad_fork_free_pid;
    }

    if (clone_flags & CLONE_THREAD) {
        current->signal->nr_threads++;
        atomic_inc(&current->signal->live);
        atomic_inc(&current->signal->sigcnt);
        p->group_leader = current->group_leader;
        list_add_tail_rcu(&p->thread_group, &p->group_leader->thread_group);
    }

    if (likely(p->pid)) {
        tracehook_finish_clone(p, clone_flags, trace);

        if (thread_group_leader(p)) {
            if (is_child_reaper(pid))
                p->nsproxy->pid_ns->child_reaper = p;

            p->signal->leader_pid = pid;
            p->signal->tty = tty_kref_get(current->signal->tty);
            attach_pid(p, PIDTYPE_PGID, task_pgrp(current));
            attach_pid(p, PIDTYPE_SID, task_session(current));
            list_add_tail(&p->sibling, &p->real_parent->children);
            list_add_tail_rcu(&p->tasks, &init_task.tasks);
            __this_cpu_inc(process_counts);
        }
        attach_pid(p, PIDTYPE_PID, pid);
        nr_threads++;
    }

    total_forks++;
    spin_unlock(&current->sighand->siglock);
    write_unlock_irq(&tasklist_lock);
    proc_fork_connector(p);
    cgroup_post_fork(p);
    if (clone_flags & CLONE_THREAD)
        threadgroup_fork_read_unlock(current);
    perf_event_fork(p);
    return p;

bad_fork_free_pid:
    if (pid != &init_struct_pid)
        free_pid(pid);
bad_fork_cleanup_io:
    if (p->io_context)
        exit_io_context(p);
bad_fork_cleanup_namespaces:
    exit_task_namespaces(p);
bad_fork_cleanup_mm:
    if (p->mm) {
        task_lock(p);
        if (p->signal->oom_score_adj == OOM_SCORE_ADJ_MIN)
            atomic_dec(&p->mm->oom_disable_count);
        task_unlock(p);
        mmput(p->mm);
    }
bad_fork_cleanup_signal:
    if (!(clone_flags & CLONE_THREAD))
        free_signal_struct(p->signal);
bad_fork_cleanup_sighand:
    __cleanup_sighand(p->sighand);
bad_fork_cleanup_fs:
    exit_fs(p); /* blocking */
bad_fork_cleanup_files:
    exit_files(p); /* blocking */
bad_fork_cleanup_semundo:
    exit_sem(p);
bad_fork_cleanup_audit:
    audit_free(p);
bad_fork_cleanup_policy:
    perf_event_free_task(p);
#ifdef CONFIG_NUMA
    mpol_put(p->mempolicy);
bad_fork_cleanup_cgroup:
#endif
    if (clone_flags & CLONE_THREAD)
        threadgroup_fork_read_unlock(current);
    cgroup_exit(p, cgroup_callbacks_done);
    delayacct_tsk_free(p);
    module_put(task_thread_info(p)->exec_domain->module);
bad_fork_cleanup_count:
    atomic_dec(&p->cred->user->processes);
    exit_creds(p);
bad_fork_free:
    free_task(p);
fork_out:
    return ERR_PTR(retval);
}

开发者ID:roxdragon，项目名称:AIR-Kernel_ICS，代码行数:101，代码来源:fork.c

示例2: ERR_PTR


//.........这里部分代码省略.........
	*/
	recalc_sigpending();
	if (signal_pending(current)) {
		spin_unlock(&current->sighand->siglock);
		write_unlock_irq(&tasklist_lock);
		retval = -ERESTARTNOINTR;
		goto bad_fork_free_pid;
	}

	if (likely(p->pid)) {
		ptrace_init_task(p, (clone_flags & CLONE_PTRACE) || trace);

		init_task_pid(p, PIDTYPE_PID, pid);
		if (thread_group_leader(p)) {
			init_task_pid(p, PIDTYPE_PGID, task_pgrp(current));
			init_task_pid(p, PIDTYPE_SID, task_session(current));

			if (is_child_reaper(pid)) {
				ns_of_pid(pid)->child_reaper = p;
				p->signal->flags |= SIGNAL_UNKILLABLE;
			}

			p->signal->leader_pid = pid;
			p->signal->tty = tty_kref_get(current->signal->tty);
			list_add_tail(&p->sibling, &p->real_parent->children);
			list_add_tail_rcu(&p->tasks, &init_task.tasks);
			attach_pid(p, PIDTYPE_PGID);
			attach_pid(p, PIDTYPE_SID);
			__this_cpu_inc(process_counts);
		} else {
			current->signal->nr_threads++;
			atomic_inc(&current->signal->live);
			atomic_inc(&current->signal->sigcnt);
			list_add_tail_rcu(&p->thread_group,
					  &p->group_leader->thread_group);
			list_add_tail_rcu(&p->thread_node,
					  &p->signal->thread_head);
		}
		attach_pid(p, PIDTYPE_PID);
		nr_threads++;
	}

	total_forks++;
	spin_unlock(&current->sighand->siglock);
	syscall_tracepoint_update(p);
	write_unlock_irq(&tasklist_lock);

	proc_fork_connector(p);
	cgroup_post_fork(p);
	if (clone_flags & CLONE_THREAD)
		threadgroup_change_end(current);
	perf_event_fork(p);

	trace_task_newtask(p, clone_flags);
	uprobe_copy_process(p, clone_flags);

	return p;

bad_fork_free_pid:
	if (pid != &init_struct_pid)
		free_pid(pid);
bad_fork_cleanup_io:
	if (p->io_context)
		exit_io_context(p);
bad_fork_cleanup_namespaces:
	exit_task_namespaces(p);
bad_fork_cleanup_mm:
	if (p->mm)
		mmput(p->mm);
bad_fork_cleanup_signal:
	if (!(clone_flags & CLONE_THREAD))
		free_signal_struct(p->signal);
bad_fork_cleanup_sighand:
	__cleanup_sighand(p->sighand);
bad_fork_cleanup_fs:
	exit_fs(p); /* blocking */
bad_fork_cleanup_files:
	exit_files(p); /* blocking */
bad_fork_cleanup_semundo:
	exit_sem(p);
bad_fork_cleanup_audit:
	audit_free(p);
bad_fork_cleanup_perf:
	perf_event_free_task(p);
bad_fork_cleanup_policy:
#ifdef CONFIG_NUMA
	mpol_put(p->mempolicy);
bad_fork_cleanup_threadgroup_lock:
#endif
	if (clone_flags & CLONE_THREAD)
		threadgroup_change_end(current);
	delayacct_tsk_free(p);
bad_fork_cleanup_count:
	atomic_dec(&p->cred->user->processes);
	exit_creds(p);
bad_fork_free:
	free_task(p);
fork_out:
	return ERR_PTR(retval);
}

开发者ID:19Dan01，项目名称:linux，代码行数:101，代码来源:fork.c

示例3: ERR_PTR


//.........这里部分代码省略.........
	} else {
		p->real_parent = current;
		p->parent_exec_id = current->self_exec_id;
	}

	spin_lock(&current->sighand->siglock);

	recalc_sigpending();
	if (signal_pending(current)) {
		spin_unlock(&current->sighand->siglock);
		write_unlock_irq(&tasklist_lock);
		retval = -ERESTARTNOINTR;
		goto bad_fork_free_pid;
	}

	if (clone_flags & CLONE_THREAD) {
		current->signal->nr_threads++;
		atomic_inc(&current->signal->live);
		atomic_inc(&current->signal->sigcnt);
		p->group_leader = current->group_leader;
		list_add_tail_rcu(&p->thread_group, &p->group_leader->thread_group);
	}

	if (likely(p->pid)) {
		ptrace_init_task(p, (clone_flags & CLONE_PTRACE) || trace);

		if (thread_group_leader(p)) {
			if (is_child_reaper(pid))
				p->nsproxy->pid_ns->child_reaper = p;

			p->signal->leader_pid = pid;
			p->signal->tty = tty_kref_get(current->signal->tty);
			attach_pid(p, PIDTYPE_PGID, task_pgrp(current));
			attach_pid(p, PIDTYPE_SID, task_session(current));
			list_add_tail(&p->sibling, &p->real_parent->children);
			list_add_tail_rcu(&p->tasks, &init_task.tasks);
			__this_cpu_inc(process_counts);
		}
		attach_pid(p, PIDTYPE_PID, pid);
		nr_threads++;
	}

	total_forks++;
	spin_unlock(&current->sighand->siglock);
	write_unlock_irq(&tasklist_lock);
	proc_fork_connector(p);
	cgroup_post_fork(p);
	if (clone_flags & CLONE_THREAD)
		threadgroup_change_end(current);
	perf_event_fork(p);

	trace_task_newtask(p, clone_flags);

	return p;

bad_fork_free_pid:
	if (pid != &init_struct_pid)
		free_pid(pid);
bad_fork_cleanup_io:
	if (p->io_context)
		exit_io_context(p);
bad_fork_cleanup_namespaces:
	if (unlikely(clone_flags & CLONE_NEWPID))
		pid_ns_release_proc(p->nsproxy->pid_ns);
	exit_task_namespaces(p);
bad_fork_cleanup_mm:
	if (p->mm)
		mmput(p->mm);
bad_fork_cleanup_signal:
	if (!(clone_flags & CLONE_THREAD))
		free_signal_struct(p->signal);
bad_fork_cleanup_sighand:
	__cleanup_sighand(p->sighand);
bad_fork_cleanup_fs:
	exit_fs(p); 
bad_fork_cleanup_files:
	exit_files(p); 
bad_fork_cleanup_semundo:
	exit_sem(p);
bad_fork_cleanup_audit:
	audit_free(p);
bad_fork_cleanup_policy:
	perf_event_free_task(p);
#ifdef CONFIG_NUMA
	mpol_put(p->mempolicy);
bad_fork_cleanup_cgroup:
#endif
	if (clone_flags & CLONE_THREAD)
		threadgroup_change_end(current);
	cgroup_exit(p, cgroup_callbacks_done);
	delayacct_tsk_free(p);
	module_put(task_thread_info(p)->exec_domain->module);
bad_fork_cleanup_count:
	atomic_dec(&p->cred->user->processes);
	exit_creds(p);
bad_fork_free:
	free_task(p);
fork_out:
	return ERR_PTR(retval);
}

开发者ID:MiniBlu，项目名称:cm11_kernel_htc_msm8974a3ul，代码行数:101，代码来源:fork.c

注：本文中的perf_event_fork函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。