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source/buffer/trace_buffer.h

@@ -0,0 +1,106 @@
+/*
+ * diagnose-tools 工具通用调试缓冲区模块
+ * 这是为了解决procfs/trace的问题而编写 
+ *
+ * Copyright (C) 20２０ Alibaba Ltd.
+ *
+ * 作者： Baoyou Xie <baoyou.xie@linux.alibaba.com>
+ *
+ * License terms: GNU General Public License (GPL) version 3
+ *
+ */
+
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/stddef.h>
+
+/**
+ * 调试缓冲区描述符
+ *    buffer: 当前正在接受调用者输出的缓冲区
+ *        data: 数据起始指针
+ *        pos:  当前写入位置
+ *        circle: 是否已经产生了回绕
+ *        tail: 有效位置的尾部
+ *    product: 将buffer中数据临时保存到此，避免影响记录速度
+ *        data: 数据起始指针
+ *        len:  数据有效长度
+ *    buf_size: buffer/product的大小
+ */
+#define DIAG_TRACE_BUF_SIZE 1024
+
+struct diag_trace_buffer {
+	struct {
+		char *data;
+		unsigned int pos;
+		int circle;
+		unsigned int tail;
+		spinlock_t lock;
+		struct mutex mutex;
+	} buffer;
+
+	struct {
+		char *data;
+		unsigned int len;
+	} product;
+
+	char fmt_buffer[DIAG_TRACE_BUF_SIZE];
+	unsigned int buf_size;
+};
+
+int init_diag_trace_buffer(struct diag_trace_buffer *buffer,
+	unsigned int buf_size);
+void destroy_diag_trace_buffer(struct diag_trace_buffer *buffer);
+void discard_diag_trace_buffer(struct diag_trace_buffer *buffer);
+void backup_diag_trace_buffer(struct diag_trace_buffer *buffer);
+asmlinkage int
+diag_trace_buffer_printk_nolock(struct diag_trace_buffer *buffer,
+	const char *fmt, ...);
+asmlinkage int
+diag_trace_buffer_printk(struct diag_trace_buffer *buffer,
+	const char *fmt, ...);
+asmlinkage int
+diag_trace_buffer_write_nolock(struct diag_trace_buffer *buffer,
+	const void *data, size_t len);
+asmlinkage int
+diag_trace_buffer_write(struct diag_trace_buffer *buffer,
+	const void *data, size_t len);
+#define diag_trace_buffer_spin_lock(__buffer, flags)	\
+	spin_lock_irqsave(&((__buffer)->buffer.lock), flags)
+#define diag_trace_buffer_spin_unlock(__buffer, flags)	\
+	spin_unlock_irqrestore(&((__buffer)->buffer.lock), flags)
+void diag_trace_buffer_mutex_lock(struct diag_trace_buffer *buffer);
+void diag_trace_buffer_mutex_unlock(struct diag_trace_buffer *buffer);
+
+void diagnose_trace_buffer_stack_trace(int pre, struct diag_trace_buffer *buffer,
+	struct task_struct *p, unsigned long *backtrace);
+void diagnose_trace_buffer_nolock_stack_trace(int pre, struct diag_trace_buffer *buffer,
+	struct task_struct *p, unsigned long *backtrace);
+void diagnose_trace_buffer_nolock_stack_trace_user(int pre, struct diag_trace_buffer *buffer,
+	unsigned long *backtrace);
+void diagnose_trace_buffer_stack_trace_user(int pre, struct diag_trace_buffer *buffer,
+	unsigned long *backtrace);
+void diagnose_trace_buffer_nolock_stack_trace_user_tsk(int pre, struct diag_trace_buffer *buffer,
+	struct task_struct *tsk, unsigned long *backtrace);
+void diagnose_trace_buffer_stack_trace_user_tsk(int pre, struct diag_trace_buffer *buffer,
+	struct task_struct *tsk, unsigned long *backtrace);
+void diag_trace_buffer_process_chain(int pre, struct diag_trace_buffer *buffer, struct task_struct *tsk);
+void diag_trace_buffer_nolock_process_chain(int pre, struct diag_trace_buffer *buffer, struct task_struct *tsk);
+void diag_trace_buffer_process_chain_cmdline(int pre, struct diag_trace_buffer *buffer, struct task_struct *tsk);
+void diag_trace_buffer_nolock_process_chain_cmdline(int pre, struct diag_trace_buffer *buffer, struct task_struct *tsk);
+void trace_buffer_cgroups_tsk(int pre, struct diag_trace_buffer *buffer, struct task_struct *tsk);
+void trace_buffer_nolock_cgroups_tsk(int pre, struct diag_trace_buffer *buffer, struct task_struct *tsk);
+void trace_buffer_cgroups(int pre, struct diag_trace_buffer *buffer);
+void trace_buffer_nolock_cgroups(int pre, struct diag_trace_buffer *buffer);
+void diag_trace_buffer_all_task_stack(int pre, struct diag_trace_buffer *buffer);
+void diag_trace_buffer_nolock_all_task_stack(int pre,
+	struct diag_trace_buffer *buffer);
+void diagnose_trace_buffer_nolock_stack_trace_unfold(int pre, struct diag_trace_buffer *buffer,
+	struct task_struct *p, unsigned long *backtrace);
+void diagnose_trace_buffer_nolock_stack_trace_unfold_user(int pre, struct diag_trace_buffer *buffer,
+	unsigned long *backtrace);
+void diagnose_print_stack_trace_unfold_user_tsk(int pre, int might_sleep, struct task_struct *tsk, unsigned long *backtrace);
+void diagnose_trace_buffer_nolock_stack_trace_unfold_user_tsk(int pre, int might_sleep, struct diag_trace_buffer *buffer,
+	struct task_struct *tsk, unsigned long *backtrace);
+void diagnose_trace_buffer_stack_trace_unfold_user_tsk(int pre, int might_sleep, struct diag_trace_buffer *buffer,
+	struct task_struct *tsk, unsigned long *backtrace);
+