03456a158d
This drops the trace.info file and move its contents into the common perf.data file. This is done by creating a new trace_info section into this file. A user of perf headers needs to call perf_header__set_trace_info() to save the trace meta informations into the perf.data file. A file created by perf after his patch is unsupported by previous version because the size of the headers have increased. That said, it's two new fields that have been added in the end of the headers, and those could be ignored by previous versions if they just handled the dynamic header size and then ignore the unknow part. The offsets guarantee the compatibility. We'll do a -stable fix for that. But current previous versions handle the header size using its static size, not dynamic, then it's not backward compatible with trace records. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <20091006213643.GA5343@nowhere> Signed-off-by: Ingo Molnar <mingo@elte.hu>
50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
#ifndef __PERF_HEADER_H
|
|
#define __PERF_HEADER_H
|
|
|
|
#include "../../../include/linux/perf_event.h"
|
|
#include <sys/types.h>
|
|
#include "types.h"
|
|
|
|
struct perf_header_attr {
|
|
struct perf_event_attr attr;
|
|
int ids, size;
|
|
u64 *id;
|
|
off_t id_offset;
|
|
};
|
|
|
|
struct perf_header {
|
|
int frozen;
|
|
int attrs, size;
|
|
struct perf_header_attr **attr;
|
|
s64 attr_offset;
|
|
u64 data_offset;
|
|
u64 data_size;
|
|
u64 event_offset;
|
|
u64 event_size;
|
|
u64 trace_info_offset;
|
|
u64 trace_info_size;
|
|
};
|
|
|
|
struct perf_header *perf_header__read(int fd);
|
|
void perf_header__write(struct perf_header *self, int fd);
|
|
|
|
void perf_header__add_attr(struct perf_header *self,
|
|
struct perf_header_attr *attr);
|
|
|
|
void perf_header__push_event(u64 id, const char *name);
|
|
char *perf_header__find_event(u64 id);
|
|
|
|
|
|
struct perf_header_attr *
|
|
perf_header_attr__new(struct perf_event_attr *attr);
|
|
void perf_header_attr__add_id(struct perf_header_attr *self, u64 id);
|
|
|
|
u64 perf_header__sample_type(struct perf_header *header);
|
|
struct perf_event_attr *
|
|
perf_header__find_attr(u64 id, struct perf_header *header);
|
|
void perf_header__set_trace_info(void);
|
|
|
|
struct perf_header *perf_header__new(void);
|
|
|
|
#endif /* __PERF_HEADER_H */
|