#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:
*/
-
-struct perf_header_attr *perf_header_attr__new(struct perf_counter_attr *attr)
+struct perf_header_attr *perf_header_attr__new(struct perf_event_attr *attr)
{
struct perf_header_attr *self = malloc(sizeof(*self));
- if (!self)
- die("nomem");
-
- self->attr = *attr;
- self->ids = 0;
- self->size = 1;
- self->id = malloc(sizeof(u64));
-
- if (!self->id)
- die("nomem");
+ if (self != NULL) {
+ self->attr = *attr;
+ self->ids = 0;
+ self->size = 1;
+ self->id = malloc(sizeof(u64));
+ if (self->id == NULL) {
+ free(self);
+ self = NULL;
+ }
+ }
return self;
}
-void perf_header_attr__add_id(struct perf_header_attr *self, u64 id)
+void perf_header_attr__delete(struct perf_header_attr *self)
+{
+ free(self->id);
+ free(self);
+}
+
+int perf_header_attr__add_id(struct perf_header_attr *self, u64 id)
{
int pos = self->ids;
self->ids++;
if (self->ids > self->size) {
- self->size *= 2;
- self->id = realloc(self->id, self->size * sizeof(u64));
- if (!self->id)
- die("nomem");
+ int nsize = self->size * 2;
+ u64 *nid = realloc(self->id, nsize * sizeof(u64));
+
+ if (nid == NULL)
+ return -1;
+
+ self->size = nsize;
+ self->id = nid;
}
self->id[pos] = id;
+ return 0;
}
/*
- *
+ * Create new perf.data header:
*/
-
struct perf_header *perf_header__new(void)
{
- struct perf_header *self = malloc(sizeof(*self));
+ struct perf_header *self = zalloc(sizeof(*self));
- if (!self)
- die("nomem");
+ if (self != NULL) {
+ self->size = 1;
+ self->attr = malloc(sizeof(void *));
- self->frozen = 0;
+ if (self->attr == NULL) {
+ free(self);
+ self = NULL;
+ }
+ }
- self->attrs = 0;
- self->size = 1;
- self->attr = malloc(sizeof(void *));
+ return self;
+}
- if (!self->attr)
- die("nomem");
+void perf_header__delete(struct perf_header *self)
+{
+ int i;
- self->data_offset = 0;
- self->data_size = 0;
+ for (i = 0; i < self->attrs; ++i)
+ perf_header_attr__delete(self->attr[i]);
- return self;
+ free(self->attr);
+ free(self);
}
-void perf_header__add_attr(struct perf_header *self,
- struct perf_header_attr *attr)
+int perf_header__add_attr(struct perf_header *self,
+ struct perf_header_attr *attr)
{
- int pos = self->attrs;
-
if (self->frozen)
- die("frozen");
+ return -1;
+
+ if (self->attrs == self->size) {
+ int nsize = self->size * 2;
+ struct perf_header_attr **nattr;
+
+ nattr = realloc(self->attr, nsize * sizeof(void *));
+ if (nattr == NULL)
+ return -1;
+
+ self->size = nsize;
+ self->attr = nattr;
+ }
+
+ self->attr[self->attrs++] = attr;
+ return 0;
+}
+
+#define MAX_EVENT_NAME 64
- self->attrs++;
- if (self->attrs > self->size) {
- self->size *= 2;
- self->attr = realloc(self->attr, self->size * sizeof(void *));
- if (!self->attr)
+struct perf_trace_event_type {
+ u64 event_id;
+ char name[MAX_EVENT_NAME];
+};
+
+static int event_count;
+static struct perf_trace_event_type *events;
+
+void perf_header__push_event(u64 id, const char *name)
+{
+ if (strlen(name) > MAX_EVENT_NAME)
+ pr_warning("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");
}
- self->attr[pos] = attr;
+ memset(&events[event_count], 0, sizeof(struct perf_trace_event_type));
+ events[event_count].event_id = id;
+ strncpy(events[event_count].name, name, MAX_EVENT_NAME - 1);
+ 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)
-struct perf_file_section {
- u64 offset;
- u64 size;
-};
-
struct perf_file_attr {
- struct perf_counter_attr attr;
+ struct perf_event_attr attr;
struct perf_file_section ids;
};
-struct perf_file_header {
- u64 magic;
- u64 size;
- u64 attr_size;
- struct perf_file_section attrs;
- struct perf_file_section data;
-};
+void perf_header__set_feat(struct perf_header *self, int feat)
+{
+ 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 int do_write(int fd, const void *buf, size_t size)
{
while (size) {
int ret = write(fd, buf, size);
if (ret < 0)
- die("failed to write");
+ return -errno;
size -= ret;
buf += ret;
}
+
+ return 0;
}
-void perf_header__write(struct perf_header *self, int fd)
+static int __dsos__write_buildid_table(struct list_head *head, int fd)
+{
+ struct dso *pos;
+
+ list_for_each_entry(pos, head, node) {
+ int err;
+ struct build_id_event b;
+ size_t len;
+
+ if (!pos->has_build_id)
+ continue;
+ len = pos->long_name_len + 1;
+ len = ALIGN(len, 64);
+ memset(&b, 0, sizeof(b));
+ memcpy(&b.build_id, pos->build_id, sizeof(pos->build_id));
+ b.header.size = sizeof(b) + len;
+ err = do_write(fd, &b, sizeof(b));
+ if (err < 0)
+ return err;
+ err = do_write(fd, pos->long_name, len);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static int dsos__write_buildid_table(int fd)
+{
+ int err = __dsos__write_buildid_table(&dsos__kernel, fd);
+ if (err == 0)
+ err = __dsos__write_buildid_table(&dsos__user, fd);
+ return err;
+}
+
+static int perf_header__adds_write(struct perf_header *self, int fd)
+{
+ int nr_sections;
+ struct perf_file_section *feat_sec;
+ int sec_size;
+ u64 sec_start;
+ int idx = 0, err;
+
+ if (dsos__read_build_ids())
+ perf_header__set_feat(self, HEADER_BUILD_ID);
+
+ nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
+ if (!nr_sections)
+ return 0;
+
+ feat_sec = calloc(sizeof(*feat_sec), nr_sections);
+ if (feat_sec == NULL)
+ return -ENOMEM;
+
+ 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++];
+
+ /* Write trace info */
+ 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;
+ }
+
+
+ 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);
+ err = dsos__write_buildid_table(fd);
+ if (err < 0) {
+ pr_debug("failed to write buildid table\n");
+ goto out_free;
+ }
+ buildid_sec->size = lseek(fd, 0, SEEK_CUR) - buildid_sec->offset;
+ }
+
+ lseek(fd, sec_start, SEEK_SET);
+ err = do_write(fd, feat_sec, sec_size);
+ if (err < 0)
+ pr_debug("failed to write feature section\n");
+out_free:
+ free(feat_sec);
+ return err;
+}
+
+int perf_header__write(struct perf_header *self, int fd, bool at_exit)
{
struct perf_file_header f_header;
struct perf_file_attr f_attr;
struct perf_header_attr *attr;
- int i;
+ int i, err;
lseek(fd, sizeof(f_header), SEEK_SET);
attr = self->attr[i];
attr->id_offset = lseek(fd, 0, SEEK_CUR);
- do_write(fd, attr->id, attr->ids * sizeof(u64));
+ err = do_write(fd, attr->id, attr->ids * sizeof(u64));
+ if (err < 0) {
+ pr_debug("failed to write perf header\n");
+ return err;
+ }
}
.size = attr->ids * sizeof(u64),
}
};
- do_write(fd, &f_attr, sizeof(f_attr));
+ err = do_write(fd, &f_attr, sizeof(f_attr));
+ if (err < 0) {
+ pr_debug("failed to write perf header attribute\n");
+ return err;
+ }
}
+ self->event_offset = lseek(fd, 0, SEEK_CUR);
+ self->event_size = event_count * sizeof(struct perf_trace_event_type);
+ if (events) {
+ err = do_write(fd, events, self->event_size);
+ if (err < 0) {
+ pr_debug("failed to write perf header events\n");
+ return err;
+ }
+ }
self->data_offset = lseek(fd, 0, SEEK_CUR);
+ if (at_exit) {
+ err = perf_header__adds_write(self, fd);
+ if (err < 0)
+ return err;
+ }
+
f_header = (struct perf_file_header){
.magic = PERF_MAGIC,
.size = sizeof(f_header),
.offset = self->data_offset,
.size = self->data_size,
},
+ .event_types = {
+ .offset = self->event_offset,
+ .size = self->event_size,
+ },
};
+ 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));
+ err = do_write(fd, &f_header, sizeof(f_header));
+ if (err < 0) {
+ pr_debug("failed to write perf header\n");
+ return err;
+ }
lseek(fd, self->data_offset + self->data_size, SEEK_SET);
self->frozen = 1;
+ return 0;
}
static void do_read(int fd, void *buf, size_t size)
if (ret < 0)
die("failed to read");
+ if (ret == 0)
+ die("failed to read: missing data");
size -= ret;
buf += ret;
}
}
-struct perf_header *perf_header__read(int fd)
+int perf_header__process_sections(struct perf_header *self, int fd,
+ int (*process)(struct perf_file_section *self,
+ int feat, int fd))
+{
+ struct perf_file_section *feat_sec;
+ int nr_sections;
+ int sec_size;
+ int idx = 0;
+ int err = 0, feat = 1;
+
+ nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
+ if (!nr_sections)
+ return 0;
+
+ feat_sec = calloc(sizeof(*feat_sec), nr_sections);
+ if (!feat_sec)
+ return -1;
+
+ sec_size = sizeof(*feat_sec) * nr_sections;
+
+ lseek(fd, self->data_offset + self->data_size, SEEK_SET);
+
+ do_read(fd, feat_sec, sec_size);
+
+ while (idx < nr_sections && feat < HEADER_LAST_FEATURE) {
+ if (perf_header__has_feat(self, feat)) {
+ struct perf_file_section *sec = &feat_sec[idx++];
+
+ err = process(sec, feat, fd);
+ if (err < 0)
+ break;
+ }
+ ++feat;
+ }
+
+ free(feat_sec);
+ return err;
+};
+
+int perf_file_header__read(struct perf_file_header *self,
+ struct perf_header *ph, int fd)
+{
+ lseek(fd, 0, SEEK_SET);
+ do_read(fd, self, sizeof(*self));
+
+ if (self->magic != PERF_MAGIC ||
+ self->attr_size != sizeof(struct perf_file_attr))
+ return -1;
+
+ if (self->size != sizeof(*self)) {
+ /* Support the previous format */
+ if (self->size == offsetof(typeof(*self), adds_features))
+ bitmap_zero(self->adds_features, HEADER_FEAT_BITS);
+ else
+ return -1;
+ }
+
+ memcpy(&ph->adds_features, &self->adds_features,
+ sizeof(self->adds_features));
+
+ ph->event_offset = self->event_types.offset;
+ ph->event_size = self->event_types.size;
+ ph->data_offset = self->data.offset;
+ ph->data_size = self->data.size;
+ return 0;
+}
+
+static int perf_file_section__process(struct perf_file_section *self,
+ int feat, int fd)
+{
+ if (lseek(fd, self->offset, SEEK_SET) < 0) {
+ pr_debug("Failed to lseek to %Ld offset for feature %d, "
+ "continuing...\n", self->offset, feat);
+ return 0;
+ }
+
+ switch (feat) {
+ case HEADER_TRACE_INFO:
+ trace_report(fd);
+ break;
+
+ case HEADER_BUILD_ID:
+ if (perf_header__read_build_ids(fd, self->offset, self->size))
+ pr_debug("Failed to read buildids, continuing...\n");
+ break;
+ default:
+ pr_debug("unknown feature %d, continuing...\n", feat);
+ }
+
+ return 0;
+}
+
+int perf_header__read(struct perf_header *self, int fd)
{
- struct perf_header *self = perf_header__new();
struct perf_file_header f_header;
struct perf_file_attr f_attr;
u64 f_id;
-
int nr_attrs, nr_ids, i, j;
- lseek(fd, 0, SEEK_SET);
- 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 (perf_file_header__read(&f_header, self, fd) < 0) {
+ pr_debug("incompatible file format\n");
+ return -EINVAL;
+ }
nr_attrs = f_header.attrs.size / sizeof(f_attr);
lseek(fd, f_header.attrs.offset, SEEK_SET);
for (i = 0; i < nr_attrs; i++) {
struct perf_header_attr *attr;
- off_t tmp = lseek(fd, 0, SEEK_CUR);
+ off_t tmp;
do_read(fd, &f_attr, sizeof(f_attr));
+ tmp = lseek(fd, 0, SEEK_CUR);
attr = perf_header_attr__new(&f_attr.attr);
+ if (attr == NULL)
+ return -ENOMEM;
nr_ids = f_attr.ids.size / sizeof(u64);
lseek(fd, f_attr.ids.offset, SEEK_SET);
for (j = 0; j < nr_ids; j++) {
do_read(fd, &f_id, sizeof(f_id));
- perf_header_attr__add_id(attr, f_id);
+ if (perf_header_attr__add_id(attr, f_id) < 0) {
+ perf_header_attr__delete(attr);
+ return -ENOMEM;
+ }
+ }
+ if (perf_header__add_attr(self, attr) < 0) {
+ perf_header_attr__delete(attr);
+ return -ENOMEM;
}
- perf_header__add_attr(self, attr);
+
lseek(fd, tmp, SEEK_SET);
}
- self->data_offset = f_header.data.offset;
- self->data_size = f_header.data.size;
+ if (f_header.event_types.size) {
+ lseek(fd, f_header.event_types.offset, SEEK_SET);
+ events = malloc(f_header.event_types.size);
+ if (events == NULL)
+ return -ENOMEM;
+ do_read(fd, events, f_header.event_types.size);
+ event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type);
+ }
+
+ perf_header__process_sections(self, fd, perf_file_section__process);
- lseek(fd, self->data_offset + self->data_size, SEEK_SET);
+ lseek(fd, self->data_offset, SEEK_SET);
self->frozen = 1;
+ return 0;
+}
- return self;
+u64 perf_header__sample_type(struct perf_header *header)
+{
+ u64 type = 0;
+ int i;
+
+ for (i = 0; i < header->attrs; i++) {
+ struct perf_header_attr *attr = header->attr[i];
+
+ if (!type)
+ type = attr->attr.sample_type;
+ else if (type != attr->attr.sample_type)
+ die("non matching sample_type");
+ }
+
+ return type;
+}
+
+struct perf_event_attr *
+perf_header__find_attr(u64 id, struct perf_header *header)
+{
+ int i;
+
+ for (i = 0; i < header->attrs; i++) {
+ struct perf_header_attr *attr = header->attr[i];
+ int j;
+
+ for (j = 0; j < attr->ids; j++) {
+ if (attr->id[j] == id)
+ return &attr->attr;
+ }
+ }
+
+ return NULL;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff