63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
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/*
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* Copyright (c) 2019 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/sec_debug.h>
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/* from kernel/locking/mutex.c */
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#define MUTEX_FLAGS 0x07
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static inline struct task_struct *__owner_task(unsigned long owner)
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{
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return (struct task_struct *)(owner & ~MUTEX_FLAGS);
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}
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static void sec_debug_print_mutex_info(struct task_struct *task, struct sec_debug_wait *winfo, bool raw)
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{
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struct mutex *wmutex = (struct mutex *)winfo->data;
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struct task_struct *owner_task = __owner_task(atomic_long_read(&wmutex->owner));
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pr_info("Mutex: %pS", wmutex);
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if (owner_task) {
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if (raw)
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pr_cont(": owner[0x%lx %s :%d]", owner_task, owner_task->comm, owner_task->pid);
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else
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pr_cont(": owner[%s :%d]", owner_task->comm, owner_task->pid);
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}
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pr_cont("\n");
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}
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void sec_debug_wtsk_print_info(struct task_struct *task, bool raw)
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{
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struct sec_debug_wait winfo;
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winfo.type = task->ssdbg_wait.type;
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winfo.data = task->ssdbg_wait.data;
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if (!(winfo.type && winfo.data))
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return;
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switch (winfo.type) {
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case DTYPE_MUTEX:
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sec_debug_print_mutex_info(task, &winfo, raw);
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break;
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default:
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/* unknown type */
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break;
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}
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}
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void sec_debug_wtsk_set_data(int type, void *data)
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{
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struct sec_debug_wait *cur_wait = ¤t->ssdbg_wait;
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cur_wait->type = type;
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cur_wait->data = data;
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}
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