107 lines
4.6 KiB
C
107 lines
4.6 KiB
C
/*
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* diagnose-tools 工具通用调试缓冲区模块
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* 这是为了解决procfs/trace的问题而编写
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*
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* Copyright (C) 20２０ Alibaba Ltd.
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*
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* 作者： Baoyou Xie <baoyou.xie@linux.alibaba.com>
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*
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* License terms: GNU General Public License (GPL) version 3
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*
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*/
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#include <linux/spinlock.h>
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#include <linux/mutex.h>
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#include <linux/stddef.h>
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/**
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* 调试缓冲区描述符
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* buffer: 当前正在接受调用者输出的缓冲区
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* data: 数据起始指针
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* pos: 当前写入位置
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* circle: 是否已经产生了回绕
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* tail: 有效位置的尾部
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* product: 将buffer中数据临时保存到此，避免影响记录速度
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* data: 数据起始指针
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* len: 数据有效长度
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* buf_size: buffer/product的大小
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*/
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#define DIAG_TRACE_BUF_SIZE 1024
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struct diag_trace_buffer {
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struct {
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char *data;
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unsigned int pos;
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int circle;
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unsigned int tail;
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spinlock_t lock;
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struct mutex mutex;
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} buffer;
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struct {
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char *data;
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unsigned int len;
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} product;
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char fmt_buffer[DIAG_TRACE_BUF_SIZE];
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unsigned int buf_size;
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};
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int init_diag_trace_buffer(struct diag_trace_buffer *buffer,
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unsigned int buf_size);
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void destroy_diag_trace_buffer(struct diag_trace_buffer *buffer);
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void discard_diag_trace_buffer(struct diag_trace_buffer *buffer);
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void backup_diag_trace_buffer(struct diag_trace_buffer *buffer);
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asmlinkage int
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diag_trace_buffer_printk_nolock(struct diag_trace_buffer *buffer,
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const char *fmt, ...);
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asmlinkage int
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diag_trace_buffer_printk(struct diag_trace_buffer *buffer,
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const char *fmt, ...);
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asmlinkage int
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diag_trace_buffer_write_nolock(struct diag_trace_buffer *buffer,
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const void *data, size_t len);
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asmlinkage int
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diag_trace_buffer_write(struct diag_trace_buffer *buffer,
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const void *data, size_t len);
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#define diag_trace_buffer_spin_lock(__buffer, flags) \
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spin_lock_irqsave(&((__buffer)->buffer.lock), flags)
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#define diag_trace_buffer_spin_unlock(__buffer, flags) \
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spin_unlock_irqrestore(&((__buffer)->buffer.lock), flags)
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void diag_trace_buffer_mutex_lock(struct diag_trace_buffer *buffer);
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void diag_trace_buffer_mutex_unlock(struct diag_trace_buffer *buffer);
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void diagnose_trace_buffer_stack_trace(int pre, struct diag_trace_buffer *buffer,
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struct task_struct *p, unsigned long *backtrace);
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void diagnose_trace_buffer_nolock_stack_trace(int pre, struct diag_trace_buffer *buffer,
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struct task_struct *p, unsigned long *backtrace);
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void diagnose_trace_buffer_nolock_stack_trace_user(int pre, struct diag_trace_buffer *buffer,
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unsigned long *backtrace);
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void diagnose_trace_buffer_stack_trace_user(int pre, struct diag_trace_buffer *buffer,
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unsigned long *backtrace);
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void diagnose_trace_buffer_nolock_stack_trace_user_tsk(int pre, struct diag_trace_buffer *buffer,
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struct task_struct *tsk, unsigned long *backtrace);
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void diagnose_trace_buffer_stack_trace_user_tsk(int pre, struct diag_trace_buffer *buffer,
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struct task_struct *tsk, unsigned long *backtrace);
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void diag_trace_buffer_process_chain(int pre, struct diag_trace_buffer *buffer, struct task_struct *tsk);
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void diag_trace_buffer_nolock_process_chain(int pre, struct diag_trace_buffer *buffer, struct task_struct *tsk);
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void diag_trace_buffer_process_chain_cmdline(int pre, struct diag_trace_buffer *buffer, struct task_struct *tsk);
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void diag_trace_buffer_nolock_process_chain_cmdline(int pre, struct diag_trace_buffer *buffer, struct task_struct *tsk);
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void trace_buffer_cgroups_tsk(int pre, struct diag_trace_buffer *buffer, struct task_struct *tsk);
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void trace_buffer_nolock_cgroups_tsk(int pre, struct diag_trace_buffer *buffer, struct task_struct *tsk);
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void trace_buffer_cgroups(int pre, struct diag_trace_buffer *buffer);
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void trace_buffer_nolock_cgroups(int pre, struct diag_trace_buffer *buffer);
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void diag_trace_buffer_all_task_stack(int pre, struct diag_trace_buffer *buffer);
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void diag_trace_buffer_nolock_all_task_stack(int pre,
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struct diag_trace_buffer *buffer);
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void diagnose_trace_buffer_nolock_stack_trace_unfold(int pre, struct diag_trace_buffer *buffer,
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struct task_struct *p, unsigned long *backtrace);
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void diagnose_trace_buffer_nolock_stack_trace_unfold_user(int pre, struct diag_trace_buffer *buffer,
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unsigned long *backtrace);
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void diagnose_print_stack_trace_unfold_user_tsk(int pre, int might_sleep, struct task_struct *tsk, unsigned long *backtrace);
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void diagnose_trace_buffer_nolock_stack_trace_unfold_user_tsk(int pre, int might_sleep, struct diag_trace_buffer *buffer,
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struct task_struct *tsk, unsigned long *backtrace);
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void diagnose_trace_buffer_stack_trace_unfold_user_tsk(int pre, int might_sleep, struct diag_trace_buffer *buffer,
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struct task_struct *tsk, unsigned long *backtrace);
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