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-rw-r--r--tools/perf/util/header.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index ec4d4c2f9522..ef9114583994 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -86,6 +86,44 @@ void perf_header__add_attr(struct perf_header *self,
self->attr[pos] = attr;
}
+struct perf_trace_event_type {
+ u64 event_id;
+ char name[64];
+};
+
+static int event_count;
+static struct perf_trace_event_type *events;
+
+void perf_header__push_event(u64 id, const char *name)
+{
+ if (strlen(name) > 64)
+ printf("Event %s will be truncated\n", name);
+
+ if (!events) {
+ events = malloc(sizeof(struct perf_trace_event_type));
+ if (!events)
+ die("nomem");
+ } else {
+ events = realloc(events, (event_count + 1) * sizeof(struct perf_trace_event_type));
+ if (!events)
+ die("nomem");
+ }
+ memset(&events[event_count], 0, sizeof(struct perf_trace_event_type));
+ events[event_count].event_id = id;
+ strncpy(events[event_count].name, name, 63);
+ event_count++;
+}
+
+char *perf_header__find_event(u64 id)
+{
+ int i;
+ for (i = 0 ; i < event_count; i++) {
+ if (events[i].event_id == id)
+ return events[i].name;
+ }
+ return NULL;
+}
+
static const char *__perf_magic = "PERFFILE";
#define PERF_MAGIC (*(u64 *)__perf_magic)
@@ -106,6 +144,7 @@ struct perf_file_header {
u64 attr_size;
struct perf_file_section attrs;
struct perf_file_section data;
+ struct perf_file_section event_types;
};
static void do_write(int fd, void *buf, size_t size)
@@ -154,6 +193,11 @@ void perf_header__write(struct perf_header *self, int fd)
do_write(fd, &f_attr, sizeof(f_attr));
}
+ self->event_offset = lseek(fd, 0, SEEK_CUR);
+ self->event_size = event_count * sizeof(struct perf_trace_event_type);
+ if (events)
+ do_write(fd, events, self->event_size);
+
self->data_offset = lseek(fd, 0, SEEK_CUR);
@@ -169,6 +213,10 @@ void perf_header__write(struct perf_header *self, int fd)
.offset = self->data_offset,
.size = self->data_size,
},
+ .event_types = {
+ .offset = self->event_offset,
+ .size = self->event_size,
+ },
};
lseek(fd, 0, SEEK_SET);
@@ -234,6 +282,17 @@ struct perf_header *perf_header__read(int fd)
lseek(fd, tmp, SEEK_SET);
}
+ if (f_header.event_types.size) {
+ lseek(fd, f_header.event_types.offset, SEEK_SET);
+ events = malloc(f_header.event_types.size);
+ if (!events)
+ die("nomem");
+ do_read(fd, events, f_header.event_types.size);
+ event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type);
+ }
+ 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;