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-rw-r--r--tools/perf/util/header.c74
1 files changed, 65 insertions, 9 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index e306857b2c2..7d26659b806 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -5,6 +5,8 @@
#include "util.h"
#include "header.h"
+#include "../perf.h"
+#include "trace-event.h"
/*
* Create new perf.data header attribute:
@@ -46,23 +48,17 @@ void perf_header_attr__add_id(struct perf_header_attr *self, u64 id)
*/
struct perf_header *perf_header__new(void)
{
- struct perf_header *self = malloc(sizeof(*self));
+ struct perf_header *self = calloc(sizeof(*self), 1);
if (!self)
die("nomem");
- self->frozen = 0;
-
- self->attrs = 0;
self->size = 1;
self->attr = malloc(sizeof(void *));
if (!self->attr)
die("nomem");
- self->data_offset = 0;
- self->data_size = 0;
-
return self;
}
@@ -97,7 +93,7 @@ static struct perf_trace_event_type *events;
void perf_header__push_event(u64 id, const char *name)
{
if (strlen(name) > MAX_EVENT_NAME)
- printf("Event %s will be truncated\n", name);
+ pr_warning("Event %s will be truncated\n", name);
if (!events) {
events = malloc(sizeof(struct perf_trace_event_type));
@@ -145,8 +141,14 @@ struct perf_file_header {
struct perf_file_section attrs;
struct perf_file_section data;
struct perf_file_section event_types;
+ DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
};
+void perf_header__feat_trace_info(struct perf_header *header)
+{
+ set_bit(HEADER_TRACE_INFO, header->adds_features);
+}
+
static void do_write(int fd, void *buf, size_t size)
{
while (size) {
@@ -160,6 +162,32 @@ static void do_write(int fd, void *buf, size_t size)
}
}
+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 = self->adds_features;
+
+ if (test_bit(HEADER_TRACE_INFO, feat_mask)) {
+ /* Write trace info */
+ trace_sec.offset = lseek(fd, sizeof(trace_sec), 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);
+ }
+};
+
void perf_header__write(struct perf_header *self, int fd)
{
struct perf_file_header f_header;
@@ -198,6 +226,7 @@ void perf_header__write(struct perf_header *self, int fd)
if (events)
do_write(fd, events, self->event_size);
+ perf_header__adds_write(self, fd);
self->data_offset = lseek(fd, 0, SEEK_CUR);
@@ -219,6 +248,8 @@ void perf_header__write(struct perf_header *self, int fd)
},
};
+ 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));
lseek(fd, self->data_offset + self->data_size, SEEK_SET);
@@ -241,6 +272,20 @@ 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 = self->adds_features;
+
+ if (test_bit(HEADER_TRACE_INFO, feat_mask)) {
+ struct perf_file_section trace_sec;
+
+ do_read(fd, &trace_sec, sizeof(trace_sec));
+ lseek(fd, trace_sec.offset, SEEK_SET);
+ trace_report(fd);
+ lseek(fd, trace_sec.offset + trace_sec.size, SEEK_SET);
+ }
+};
+
struct perf_header *perf_header__read(int fd)
{
struct perf_header *self = perf_header__new();
@@ -254,10 +299,16 @@ struct perf_header *perf_header__read(int fd)
do_read(fd, &f_header, sizeof(f_header));
if (f_header.magic != PERF_MAGIC ||
- f_header.size != sizeof(f_header) ||
f_header.attr_size != sizeof(f_attr))
die("incompatible file format");
+ if (f_header.size != sizeof(f_header)) {
+ /* Support the previous format */
+ 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);
lseek(fd, f_header.attrs.offset, SEEK_SET);
@@ -290,6 +341,11 @@ struct perf_header *perf_header__read(int fd)
do_read(fd, events, f_header.event_types.size);
event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type);
}
+
+ 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;