mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-28 07:04:00 +08:00
769b0441f4
Impact: faster and lighter tracing Now that we have trace_bprintk() which is faster and consume lesser memory than trace_printk() and has the same purpose, we can now drop the old implementation in favour of the binary one from trace_bprintk(), which means we move all the implementation of trace_bprintk() to trace_printk(), so the Api doesn't change except that we must now use trace_seq_bprintk() to print the TRACE_PRINT entries. Some changes result of this: - Previously, trace_bprintk depended of a single tracer and couldn't work without. This tracer has been dropped and the whole implementation of trace_printk() (like the module formats management) is now integrated in the tracing core (comes with CONFIG_TRACING), though we keep the file trace_printk (previously trace_bprintk.c) where we can find the module management. Thus we don't overflow trace.c - changes some parts to use trace_seq_bprintk() to print TRACE_PRINT entries. - change a bit trace_printk/trace_vprintk macros to support non-builtin formats constants, and fix 'const' qualifiers warnings. But this is all transparent for developers. - etc... V2: - Rebase against last changes - Fix mispell on the changelog V3: - Rebase against last changes (moving trace_printk() to kernel.h) Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1236356510-8381-5-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
#ifndef __TRACE_EVENTS_H
|
|
#define __TRACE_EVENTS_H
|
|
|
|
#include "trace.h"
|
|
|
|
typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
|
|
int flags);
|
|
|
|
struct trace_event {
|
|
struct hlist_node node;
|
|
int type;
|
|
trace_print_func trace;
|
|
trace_print_func raw;
|
|
trace_print_func hex;
|
|
trace_print_func binary;
|
|
};
|
|
|
|
extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
|
|
__attribute__ ((format (printf, 2, 3)));
|
|
extern int
|
|
trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary);
|
|
extern int
|
|
seq_print_ip_sym(struct trace_seq *s, unsigned long ip,
|
|
unsigned long sym_flags);
|
|
extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
|
|
size_t cnt);
|
|
int trace_seq_puts(struct trace_seq *s, const char *str);
|
|
int trace_seq_putc(struct trace_seq *s, unsigned char c);
|
|
int trace_seq_putmem(struct trace_seq *s, void *mem, size_t len);
|
|
int trace_seq_putmem_hex(struct trace_seq *s, void *mem, size_t len);
|
|
int trace_seq_path(struct trace_seq *s, struct path *path);
|
|
int seq_print_userip_objs(const struct userstack_entry *entry,
|
|
struct trace_seq *s, unsigned long sym_flags);
|
|
int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
|
|
unsigned long ip, unsigned long sym_flags);
|
|
|
|
int trace_print_context(struct trace_iterator *iter);
|
|
int trace_print_lat_context(struct trace_iterator *iter);
|
|
|
|
struct trace_event *ftrace_find_event(int type);
|
|
int register_ftrace_event(struct trace_event *event);
|
|
int unregister_ftrace_event(struct trace_event *event);
|
|
|
|
enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags);
|
|
|
|
#define MAX_MEMHEX_BYTES 8
|
|
#define HEX_CHARS (MAX_MEMHEX_BYTES*2 + 1)
|
|
|
|
#define SEQ_PUT_FIELD_RET(s, x) \
|
|
do { \
|
|
if (!trace_seq_putmem(s, &(x), sizeof(x))) \
|
|
return TRACE_TYPE_PARTIAL_LINE; \
|
|
} while (0)
|
|
|
|
#define SEQ_PUT_HEX_FIELD_RET(s, x) \
|
|
do { \
|
|
BUILD_BUG_ON(sizeof(x) > MAX_MEMHEX_BYTES); \
|
|
if (!trace_seq_putmem_hex(s, &(x), sizeof(x))) \
|
|
return TRACE_TYPE_PARTIAL_LINE; \
|
|
} while (0)
|
|
|
|
#endif
|
|
|