#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
+#include <linux/list.h>
#include "util.h"
#include "header.h"
#include "../perf.h"
#include "trace-event.h"
+#include "symbol.h"
+#include "data_map.h"
+#include "debug.h"
/*
* Create new perf.data header attribute:
DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
};
-void perf_header__feat_trace_info(struct perf_header *header)
+void perf_header__set_feat(struct perf_header *self, int feat)
{
- set_bit(HEADER_TRACE_INFO, header->adds_features);
+ set_bit(feat, self->adds_features);
+}
+
+bool perf_header__has_feat(const struct perf_header *self, int feat)
+{
+ return test_bit(feat, self->adds_features);
}
static void do_write(int fd, void *buf, size_t size)
}
}
-static void perf_header__adds_write(struct perf_header *self, int fd)
+static void write_buildid_table(int fd, struct list_head *id_head)
{
- struct perf_file_section trace_sec;
- u64 cur_offset = lseek(fd, 0, SEEK_CUR);
- unsigned long *feat_mask = self->adds_features;
+ struct build_id_list *iter, *next;
+
+ list_for_each_entry_safe(iter, next, id_head, list) {
+ struct build_id_event *b = &iter->event;
+
+ do_write(fd, b, sizeof(*b));
+ do_write(fd, (void *)iter->dso_name, iter->len);
+ list_del(&iter->list);
+ free(iter);
+ }
+}
+
+static void
+perf_header__adds_write(struct perf_header *self, int fd)
+{
+ LIST_HEAD(id_list);
+ int nr_sections;
+ struct perf_file_section *feat_sec;
+ int sec_size;
+ u64 sec_start;
+ int idx = 0;
+
+ if (fetch_build_id_table(&id_list))
+ perf_header__set_feat(self, HEADER_BUILD_ID);
+
+ nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
+ if (!nr_sections)
+ return;
+
+ feat_sec = calloc(sizeof(*feat_sec), nr_sections);
+ if (!feat_sec)
+ die("No memory");
+
+ sec_size = sizeof(*feat_sec) * nr_sections;
+
+ sec_start = self->data_offset + self->data_size;
+ lseek(fd, sec_start + sec_size, SEEK_SET);
+
+ if (perf_header__has_feat(self, HEADER_TRACE_INFO)) {
+ struct perf_file_section *trace_sec;
+
+ trace_sec = &feat_sec[idx++];
- if (test_bit(HEADER_TRACE_INFO, feat_mask)) {
/* Write trace info */
- trace_sec.offset = lseek(fd, sizeof(trace_sec), SEEK_CUR);
+ trace_sec->offset = lseek(fd, 0, SEEK_CUR);
read_tracing_data(fd, attrs, nr_counters);
- trace_sec.size = lseek(fd, 0, SEEK_CUR) - trace_sec.offset;
-
- /* Write trace info headers */
- lseek(fd, cur_offset, SEEK_SET);
- do_write(fd, &trace_sec, sizeof(trace_sec));
-
- /*
- * Update cur_offset. So that other (future)
- * features can set their own infos in this place. But if we are
- * the only feature, at least that seeks to the place the data
- * should begin.
- */
- cur_offset = lseek(fd, trace_sec.offset + trace_sec.size, SEEK_SET);
+ trace_sec->size = lseek(fd, 0, SEEK_CUR) - trace_sec->offset;
}
-};
-void perf_header__write(struct perf_header *self, int fd)
+
+ if (perf_header__has_feat(self, HEADER_BUILD_ID)) {
+ struct perf_file_section *buildid_sec;
+
+ buildid_sec = &feat_sec[idx++];
+
+ /* Write build-ids */
+ buildid_sec->offset = lseek(fd, 0, SEEK_CUR);
+ write_buildid_table(fd, &id_list);
+ buildid_sec->size = lseek(fd, 0, SEEK_CUR) - buildid_sec->offset;
+ }
+
+ lseek(fd, sec_start, SEEK_SET);
+ do_write(fd, feat_sec, sec_size);
+ free(feat_sec);
+}
+
+void perf_header__write(struct perf_header *self, int fd, bool at_exit)
{
struct perf_file_header f_header;
struct perf_file_attr f_attr;
if (events)
do_write(fd, events, self->event_size);
- perf_header__adds_write(self, fd);
-
self->data_offset = lseek(fd, 0, SEEK_CUR);
+ if (at_exit)
+ perf_header__adds_write(self, fd);
+
f_header = (struct perf_file_header){
.magic = PERF_MAGIC,
.size = sizeof(f_header),
static void perf_header__adds_read(struct perf_header *self, int fd)
{
- const unsigned long *feat_mask = self->adds_features;
+ struct perf_file_section *feat_sec;
+ int nr_sections;
+ int sec_size;
+ int idx = 0;
+
+
+ nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
+ if (!nr_sections)
+ return;
+
+ feat_sec = calloc(sizeof(*feat_sec), nr_sections);
+ if (!feat_sec)
+ die("No memory");
+
+ sec_size = sizeof(*feat_sec) * nr_sections;
+
+ lseek(fd, self->data_offset + self->data_size, SEEK_SET);
+
+ do_read(fd, feat_sec, sec_size);
- if (test_bit(HEADER_TRACE_INFO, feat_mask)) {
- struct perf_file_section trace_sec;
+ if (perf_header__has_feat(self, HEADER_TRACE_INFO)) {
+ struct perf_file_section *trace_sec;
- do_read(fd, &trace_sec, sizeof(trace_sec));
- lseek(fd, trace_sec.offset, SEEK_SET);
+ trace_sec = &feat_sec[idx++];
+ lseek(fd, trace_sec->offset, SEEK_SET);
trace_report(fd);
- lseek(fd, trace_sec.offset + trace_sec.size, SEEK_SET);
}
+
+ if (perf_header__has_feat(self, HEADER_BUILD_ID)) {
+ struct perf_file_section *buildid_sec;
+
+ buildid_sec = &feat_sec[idx++];
+ lseek(fd, buildid_sec->offset, SEEK_SET);
+ if (perf_header__read_build_ids(fd, buildid_sec->size))
+ pr_debug("failed to read buildids, continuing...\n");
+ }
+
+ free(feat_sec);
};
struct perf_header *perf_header__read(int fd)
memcpy(&self->adds_features, &f_header.adds_features, sizeof(f_header.adds_features));
- perf_header__adds_read(self, fd);
-
self->event_offset = f_header.event_types.offset;
self->event_size = f_header.event_types.size;
self->data_offset = f_header.data.offset;
self->data_size = f_header.data.size;
+ perf_header__adds_read(self, fd);
+
lseek(fd, self->data_offset, SEEK_SET);
self->frozen = 1;
projects / ~andy / linux / blobdiff