+#define _FILE_OFFSET_BITS 64
+
#include <sys/types.h>
+#include <byteswap.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <linux/list.h>
+#include <linux/kernel.h>
#include "util.h"
#include "header.h"
#include "../perf.h"
#include "trace-event.h"
+#include "session.h"
#include "symbol.h"
-#include "data_map.h"
#include "debug.h"
/*
return 0;
}
-/*
- * Create new perf.data header:
- */
-struct perf_header *perf_header__new(void)
+int perf_header__init(struct perf_header *self)
{
- struct perf_header *self = zalloc(sizeof(*self));
-
- if (self != NULL) {
- self->size = 1;
- self->attr = malloc(sizeof(void *));
-
- if (self->attr == NULL) {
- free(self);
- self = NULL;
- }
- }
-
- return self;
+ self->size = 1;
+ self->attr = malloc(sizeof(void *));
+ return self->attr == NULL ? -ENOMEM : 0;
}
-void perf_header__delete(struct perf_header *self)
+void perf_header__exit(struct perf_header *self)
{
int i;
-
for (i = 0; i < self->attrs; ++i)
- perf_header_attr__delete(self->attr[i]);
-
+ perf_header_attr__delete(self->attr[i]);
free(self->attr);
- free(self);
}
int perf_header__add_attr(struct perf_header *self,
static int event_count;
static struct perf_trace_event_type *events;
-void perf_header__push_event(u64 id, const char *name)
+int 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");
+ if (events == NULL)
+ return -ENOMEM;
} else {
- events = realloc(events, (event_count + 1) * sizeof(struct perf_trace_event_type));
- if (!events)
- die("nomem");
+ struct perf_trace_event_type *nevents;
+
+ nevents = realloc(events, (event_count + 1) * sizeof(*events));
+ if (nevents == NULL)
+ return -ENOMEM;
+ events = nevents;
}
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++;
+ return 0;
}
char *perf_header__find_event(u64 id)
return 0;
}
-static int __dsos__write_buildid_table(struct list_head *head, int fd)
+#define NAME_ALIGN 64
+
+static int write_padded(int fd, const void *bf, size_t count,
+ size_t count_aligned)
{
-#define NAME_ALIGN 64
- struct dso *pos;
static const char zero_buf[NAME_ALIGN];
+ int err = do_write(fd, bf, count);
+
+ if (!err)
+ err = do_write(fd, zero_buf, count_aligned - count);
+
+ return err;
+}
+
+#define dsos__for_each_with_build_id(pos, head) \
+ list_for_each_entry(pos, head, node) \
+ if (!pos->has_build_id) \
+ continue; \
+ else
- list_for_each_entry(pos, head, node) {
+static int __dsos__write_buildid_table(struct list_head *head, u16 misc, int fd)
+{
+ struct dso *pos;
+
+ dsos__for_each_with_build_id(pos, head) {
int err;
struct build_id_event b;
size_t len;
- if (!pos->has_build_id)
+ if (!pos->hit)
continue;
len = pos->long_name_len + 1;
len = ALIGN(len, NAME_ALIGN);
memset(&b, 0, sizeof(b));
memcpy(&b.build_id, pos->build_id, sizeof(pos->build_id));
+ b.header.misc = misc;
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, pos->long_name_len + 1);
- if (err < 0)
- return err;
- err = do_write(fd, zero_buf, len - pos->long_name_len - 1);
+ err = write_padded(fd, pos->long_name,
+ pos->long_name_len + 1, len);
if (err < 0)
return err;
}
static int dsos__write_buildid_table(int fd)
{
- int err = __dsos__write_buildid_table(&dsos__kernel, fd);
+ int err = __dsos__write_buildid_table(&dsos__kernel,
+ PERF_RECORD_MISC_KERNEL, fd);
if (err == 0)
- err = __dsos__write_buildid_table(&dsos__user, fd);
+ err = __dsos__write_buildid_table(&dsos__user,
+ PERF_RECORD_MISC_USER, fd);
+ return err;
+}
+
+int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
+ const char *name, bool is_kallsyms)
+{
+ const size_t size = PATH_MAX;
+ char *filename = malloc(size),
+ *linkname = malloc(size), *targetname;
+ int len, err = -1;
+
+ if (filename == NULL || linkname == NULL)
+ goto out_free;
+
+ len = snprintf(filename, size, "%s%s%s",
+ debugdir, is_kallsyms ? "/" : "", name);
+ if (mkdir_p(filename, 0755))
+ goto out_free;
+
+ snprintf(filename + len, sizeof(filename) - len, "/%s", sbuild_id);
+
+ if (access(filename, F_OK)) {
+ if (is_kallsyms) {
+ if (copyfile("/proc/kallsyms", filename))
+ goto out_free;
+ } else if (link(name, filename) && copyfile(name, filename))
+ goto out_free;
+ }
+
+ len = snprintf(linkname, size, "%s/.build-id/%.2s",
+ debugdir, sbuild_id);
+
+ if (access(linkname, X_OK) && mkdir_p(linkname, 0755))
+ goto out_free;
+
+ snprintf(linkname + len, size - len, "/%s", sbuild_id + 2);
+ targetname = filename + strlen(debugdir) - 5;
+ memcpy(targetname, "../..", 5);
+
+ if (symlink(targetname, linkname) == 0)
+ err = 0;
+out_free:
+ free(filename);
+ free(linkname);
+ return err;
+}
+
+static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size,
+ const char *name, const char *debugdir,
+ bool is_kallsyms)
+{
+ char sbuild_id[BUILD_ID_SIZE * 2 + 1];
+
+ build_id__sprintf(build_id, build_id_size, sbuild_id);
+
+ return build_id_cache__add_s(sbuild_id, debugdir, name, is_kallsyms);
+}
+
+int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir)
+{
+ const size_t size = PATH_MAX;
+ char *filename = malloc(size),
+ *linkname = malloc(size);
+ int err = -1;
+
+ if (filename == NULL || linkname == NULL)
+ goto out_free;
+
+ snprintf(linkname, size, "%s/.build-id/%.2s/%s",
+ debugdir, sbuild_id, sbuild_id + 2);
+
+ if (access(linkname, F_OK))
+ goto out_free;
+
+ if (readlink(linkname, filename, size) < 0)
+ goto out_free;
+
+ if (unlink(linkname))
+ goto out_free;
+
+ /*
+ * Since the link is relative, we must make it absolute:
+ */
+ snprintf(linkname, size, "%s/.build-id/%.2s/%s",
+ debugdir, sbuild_id, filename);
+
+ if (unlink(linkname))
+ goto out_free;
+
+ err = 0;
+out_free:
+ free(filename);
+ free(linkname);
+ return err;
+}
+
+static int dso__cache_build_id(struct dso *self, const char *debugdir)
+{
+ bool is_kallsyms = self->kernel && self->long_name[0] != '/';
+
+ return build_id_cache__add_b(self->build_id, sizeof(self->build_id),
+ self->long_name, debugdir, is_kallsyms);
+}
+
+static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir)
+{
+ struct dso *pos;
+ int err = 0;
+
+ dsos__for_each_with_build_id(pos, head)
+ if (dso__cache_build_id(pos, debugdir))
+ err = -1;
+
return err;
}
+static int dsos__cache_build_ids(void)
+{
+ int err_kernel, err_user;
+ char debugdir[PATH_MAX];
+
+ snprintf(debugdir, sizeof(debugdir), "%s/%s", getenv("HOME"),
+ DEBUG_CACHE_DIR);
+
+ if (mkdir(debugdir, 0755) != 0 && errno != EEXIST)
+ return -1;
+
+ err_kernel = __dsos__cache_build_ids(&dsos__kernel, debugdir);
+ err_user = __dsos__cache_build_ids(&dsos__user, debugdir);
+ return err_kernel || err_user ? -1 : 0;
+}
+
static int perf_header__adds_write(struct perf_header *self, int fd)
{
int nr_sections;
u64 sec_start;
int idx = 0, err;
- if (dsos__read_build_ids())
+ if (dsos__read_build_ids(true))
perf_header__set_feat(self, HEADER_BUILD_ID);
nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
pr_debug("failed to write buildid table\n");
goto out_free;
}
- buildid_sec->size = lseek(fd, 0, SEEK_CUR) - buildid_sec->offset;
+ buildid_sec->size = lseek(fd, 0, SEEK_CUR) -
+ buildid_sec->offset;
+ dsos__cache_build_ids();
}
lseek(fd, sec_start, SEEK_SET);
return 0;
}
-static void do_read(int fd, void *buf, size_t size)
+static int do_read(int fd, void *buf, size_t size)
{
while (size) {
int ret = read(fd, buf, size);
- if (ret < 0)
- die("failed to read");
- if (ret == 0)
- die("failed to read: missing data");
+ if (ret <= 0)
+ return -1;
size -= ret;
buf += ret;
}
+
+ return 0;
+}
+
+static int perf_header__getbuffer64(struct perf_header *self,
+ int fd, void *buf, size_t size)
+{
+ if (do_read(fd, buf, size))
+ return -1;
+
+ if (self->needs_swap)
+ mem_bswap_64(buf, size);
+
+ return 0;
}
int perf_header__process_sections(struct perf_header *self, int fd,
int (*process)(struct perf_file_section *self,
+ struct perf_header *ph,
int feat, int fd))
{
struct perf_file_section *feat_sec;
int nr_sections;
int sec_size;
int idx = 0;
- int err = 0, feat = 1;
+ int err = -1, feat = 1;
nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
if (!nr_sections)
lseek(fd, self->data_offset + self->data_size, SEEK_SET);
- do_read(fd, feat_sec, sec_size);
+ if (perf_header__getbuffer64(self, fd, feat_sec, sec_size))
+ goto out_free;
+ err = 0;
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);
+ err = process(sec, self, feat, fd);
if (err < 0)
break;
}
++feat;
}
-
+out_free:
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))
+ if (do_read(fd, self, sizeof(*self)) ||
+ memcmp(&self->magic, __perf_magic, sizeof(self->magic)))
return -1;
+ if (self->attr_size != sizeof(struct perf_file_attr)) {
+ u64 attr_size = bswap_64(self->attr_size);
+
+ if (attr_size != sizeof(struct perf_file_attr))
+ return -1;
+
+ mem_bswap_64(self, offsetof(struct perf_file_header,
+ adds_features));
+ ph->needs_swap = true;
+ }
+
if (self->size != sizeof(*self)) {
/* Support the previous format */
if (self->size == offsetof(typeof(*self), adds_features))
}
memcpy(&ph->adds_features, &self->adds_features,
- sizeof(self->adds_features));
+ sizeof(ph->adds_features));
+ /*
+ * FIXME: hack that assumes that if we need swap the perf.data file
+ * may be coming from an arch with a different word-size, ergo different
+ * DEFINE_BITMAP format, investigate more later, but for now its mostly
+ * safe to assume that we have a build-id section. Trace files probably
+ * have several other issues in this realm anyway...
+ */
+ if (ph->needs_swap) {
+ memset(&ph->adds_features, 0, sizeof(ph->adds_features));
+ perf_header__set_feat(ph, HEADER_BUILD_ID);
+ }
ph->event_offset = self->event_types.offset;
- ph->event_size = self->event_types.size;
- ph->data_offset = self->data.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,
+ struct perf_header *ph,
int feat, int fd)
{
- if (lseek(fd, self->offset, SEEK_SET) < 0) {
+ if (lseek(fd, self->offset, SEEK_SET) == (off_t)-1) {
pr_debug("Failed to lseek to %Ld offset for feature %d, "
"continuing...\n", self->offset, feat);
return 0;
break;
case HEADER_BUILD_ID:
- if (perf_header__read_build_ids(fd, self->offset, self->size))
+ if (perf_header__read_build_ids(ph, fd, self->offset, self->size))
pr_debug("Failed to read buildids, continuing...\n");
break;
default:
int perf_header__read(struct perf_header *self, int fd)
{
- struct perf_file_header f_header;
+ struct perf_file_header f_header;
struct perf_file_attr f_attr;
u64 f_id;
int nr_attrs, nr_ids, i, j;
struct perf_header_attr *attr;
off_t tmp;
- do_read(fd, &f_attr, sizeof(f_attr));
+ if (perf_header__getbuffer64(self, fd, &f_attr, sizeof(f_attr)))
+ goto out_errno;
+
tmp = lseek(fd, 0, SEEK_CUR);
attr = perf_header_attr__new(&f_attr.attr);
lseek(fd, f_attr.ids.offset, SEEK_SET);
for (j = 0; j < nr_ids; j++) {
- do_read(fd, &f_id, sizeof(f_id));
+ if (perf_header__getbuffer64(self, fd, &f_id, sizeof(f_id)))
+ goto out_errno;
if (perf_header_attr__add_id(attr, f_id) < 0) {
perf_header_attr__delete(attr);
events = malloc(f_header.event_types.size);
if (events == NULL)
return -ENOMEM;
- do_read(fd, events, f_header.event_types.size);
+ if (perf_header__getbuffer64(self, fd, events,
+ f_header.event_types.size))
+ goto out_errno;
event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type);
}
self->frozen = 1;
return 0;
+out_errno:
+ return -errno;
}
u64 perf_header__sample_type(struct perf_header *header)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff