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perf tools: Use DECLARE_BITMAP instead of an open-coded array

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Use DECLARE_BITMAP instead of an open coded array for our bitmap
of featured sections.

This makes the array an unsigned long instead of a u64 but since
we use a 256 bits bitmap, the array size shouldn't vary between
different boxes.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1255795038-13751-1-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Frederic Weisbecker 2009-10-17 17:57:18 +02:00 committed by Ingo Molnar
parent 2ba0825075
commit db9f11e36d
4 changed files with 20 additions and 22 deletions
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22
tools/perf/util/header.c
View file

@ -8,8 +8,6 @@
#include "../perf.h"
#include "trace-event.h"
#include <linux/bitmap.h>
/*
* Create new perf.data header attribute:
*/
@ -143,12 +141,12 @@ struct perf_file_header {
struct perf_file_section attrs;
struct perf_file_section data;
struct perf_file_section event_types;
feat_mask_t adds_features;
DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
};
void perf_header__feat_trace_info(struct perf_header *header)
{
set_bit(HEADER_TRACE_INFO, perf_header__adds_mask(header));
set_bit(HEADER_TRACE_INFO, header->adds_features);
}
static void do_write(int fd, void *buf, size_t size)
@ -168,7 +166,7 @@ static void perf_header__adds_write(struct perf_header *self, int fd)
{
struct perf_file_section trace_sec;
u64 cur_offset = lseek(fd, 0, SEEK_CUR);
unsigned long *feat_mask = perf_header__adds_mask(self);
unsigned long *feat_mask = self->adds_features;
if (test_bit(HEADER_TRACE_INFO, feat_mask)) {
/* Write trace info */
@ -250,7 +248,7 @@ void perf_header__write(struct perf_header *self, int fd)
},
};
memcpy(&f_header.adds_features, &self->adds_features, sizeof(feat_mask_t));
memcpy(&f_header.adds_features, &self->adds_features, sizeof(self->adds_features));
lseek(fd, 0, SEEK_SET);
do_write(fd, &f_header, sizeof(f_header));
@ -276,7 +274,7 @@ static void do_read(int fd, void *buf, size_t size)
static void perf_header__adds_read(struct perf_header *self, int fd)
{
const unsigned long *feat_mask = perf_header__adds_mask(self);
const unsigned long *feat_mask = self->adds_features;
if (test_bit(HEADER_TRACE_INFO, feat_mask)) {
struct perf_file_section trace_sec;
@ -306,11 +304,9 @@ struct perf_header *perf_header__read(int fd)
if (f_header.size != sizeof(f_header)) {
/* Support the previous format */
if (f_header.size == offsetof(typeof(f_header), adds_features)) {
unsigned long *mask = (unsigned long *)(void *)
&f_header.adds_features;
bitmap_zero(mask, HEADER_FEAT_BITS);
} else
if (f_header.size == offsetof(typeof(f_header), adds_features))
bitmap_zero(f_header.adds_features, HEADER_FEAT_BITS);
else
die("incompatible file format");
}
nr_attrs = f_header.attrs.size / sizeof(f_attr);
@ -346,7 +342,7 @@ struct perf_header *perf_header__read(int fd)
event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type);
}
memcpy(&self->adds_features, &f_header.adds_features, sizeof(feat_mask_t));
memcpy(&self->adds_features, &f_header.adds_features, sizeof(f_header.adds_features));
perf_header__adds_read(self, fd);

11
tools/perf/util/header.h
View file

@ -5,6 +5,8 @@
#include <sys/types.h>
#include "types.h"
#include <linux/bitmap.h>
struct perf_header_attr {
struct perf_event_attr attr;
int ids, size;
@ -16,8 +18,6 @@ struct perf_header_attr {
#define HEADER_FEAT_BITS 256
typedef typeof(u64[HEADER_FEAT_BITS / 8]) feat_mask_t;
struct perf_header {
int frozen;
int attrs, size;
@ -27,14 +27,9 @@ struct perf_header {
u64 data_size;
u64 event_offset;
u64 event_size;
feat_mask_t adds_features;
DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
};
static inline unsigned long *perf_header__adds_mask(struct perf_header *self)
{
return (unsigned long *)(void *)&self->adds_features;
}
struct perf_header *perf_header__read(int fd);
void perf_header__write(struct perf_header *self, int fd);

1
tools/perf/util/include/asm/asm-offsets.h Normal file
View file

@ -0,0 +1 @@
/* stub */

8
tools/perf/util/include/linux/types.h
View file

@ -1 +1,7 @@
/* stub */
#ifndef _PERF_LINUX_TYPES_H_
#define _PERF_LINUX_TYPES_H_
#define DECLARE_BITMAP(name,bits) \
unsigned long name[BITS_TO_LONGS(bits)]
#endif