+#define _FILE_OFFSET_BITS 64
+
+#include "util.h"
#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 <linux/bitops.h>
+#include <sys/utsname.h>
-#include "util.h"
+#include "evlist.h"
+#include "evsel.h"
#include "header.h"
#include "../perf.h"
#include "trace-event.h"
#include "session.h"
#include "symbol.h"
#include "debug.h"
+#include "cpumap.h"
-/*
- * Create new perf.data header attribute:
- */
-struct perf_header_attr *perf_header_attr__new(struct perf_event_attr *attr)
-{
- struct perf_header_attr *self = malloc(sizeof(*self));
-
- 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__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) {
- 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;
-}
-
-int perf_header__init(struct perf_header *self)
-{
- self->size = 1;
- self->attr = malloc(sizeof(void *));
- return self->attr == NULL ? -ENOMEM : 0;
-}
-
-void perf_header__exit(struct perf_header *self)
-{
- int i;
- for (i = 0; i < self->attrs; ++i)
- perf_header_attr__delete(self->attr[i]);
- free(self->attr);
-}
-
-int perf_header__add_attr(struct perf_header *self,
- struct perf_header_attr *attr)
-{
- if (self->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
-
-struct perf_trace_event_type {
- u64 event_id;
- char name[MAX_EVENT_NAME];
-};
+static bool no_buildid_cache = false;
static int event_count;
static struct perf_trace_event_type *events;
+static u32 header_argc;
+static const char **header_argv;
+
int perf_header__push_event(u64 id, const char *name)
{
if (strlen(name) > MAX_EVENT_NAME)
return NULL;
}
-static const char *__perf_magic = "PERFFILE";
+/*
+ * magic2 = "PERFILE2"
+ * must be a numerical value to let the endianness
+ * determine the memory layout. That way we are able
+ * to detect endianness when reading the perf.data file
+ * back.
+ *
+ * we check for legacy (PERFFILE) format.
+ */
+static const char *__perf_magic1 = "PERFFILE";
+static const u64 __perf_magic2 = 0x32454c4946524550ULL;
+static const u64 __perf_magic2_sw = 0x50455246494c4532ULL;
-#define PERF_MAGIC (*(u64 *)__perf_magic)
+#define PERF_MAGIC __perf_magic2
struct perf_file_attr {
struct perf_event_attr attr;
struct perf_file_section ids;
};
-void perf_header__set_feat(struct perf_header *self, int feat)
+void perf_header__set_feat(struct perf_header *header, int feat)
+{
+ set_bit(feat, header->adds_features);
+}
+
+void perf_header__clear_feat(struct perf_header *header, int feat)
{
- set_bit(feat, self->adds_features);
+ clear_bit(feat, header->adds_features);
}
-bool perf_header__has_feat(const struct perf_header *self, int feat)
+bool perf_header__has_feat(const struct perf_header *header, int feat)
{
- return test_bit(feat, self->adds_features);
+ return test_bit(feat, header->adds_features);
}
static int do_write(int fd, const void *buf, size_t size)
return err;
}
+static int do_write_string(int fd, const char *str)
+{
+ u32 len, olen;
+ int ret;
+
+ olen = strlen(str) + 1;
+ len = ALIGN(olen, NAME_ALIGN);
+
+ /* write len, incl. \0 */
+ ret = do_write(fd, &len, sizeof(len));
+ if (ret < 0)
+ return ret;
+
+ return write_padded(fd, str, olen, len);
+}
+
+static char *do_read_string(int fd, struct perf_header *ph)
+{
+ ssize_t sz, ret;
+ u32 len;
+ char *buf;
+
+ sz = read(fd, &len, sizeof(len));
+ if (sz < (ssize_t)sizeof(len))
+ return NULL;
+
+ if (ph->needs_swap)
+ len = bswap_32(len);
+
+ buf = malloc(len);
+ if (!buf)
+ return NULL;
+
+ ret = read(fd, buf, len);
+ if (ret == (ssize_t)len) {
+ /*
+ * strings are padded by zeroes
+ * thus the actual strlen of buf
+ * may be less than len
+ */
+ return buf;
+ }
+
+ free(buf);
+ return NULL;
+}
+
+int
+perf_header__set_cmdline(int argc, const char **argv)
+{
+ int i;
+
+ header_argc = (u32)argc;
+
+ /* do not include NULL termination */
+ header_argv = calloc(argc, sizeof(char *));
+ if (!header_argv)
+ return -ENOMEM;
+
+ /*
+ * must copy argv contents because it gets moved
+ * around during option parsing
+ */
+ for (i = 0; i < argc ; i++)
+ header_argv[i] = argv[i];
+
+ return 0;
+}
+
#define dsos__for_each_with_build_id(pos, head) \
list_for_each_entry(pos, head, node) \
if (!pos->has_build_id) \
continue; \
else
-static int __dsos__write_buildid_table(struct list_head *head, int fd)
+static int __dsos__write_buildid_table(struct list_head *head, pid_t pid,
+ 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 = pos->long_name_len + 1;
+ size_t len;
+ 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.pid = pid;
+ b.header.misc = misc;
b.header.size = sizeof(b) + len;
err = do_write(fd, &b, sizeof(b));
if (err < 0)
return 0;
}
-static int dsos__write_buildid_table(int fd)
+static int machine__write_buildid_table(struct machine *machine, int fd)
{
- int err = __dsos__write_buildid_table(&dsos__kernel, fd);
+ int err;
+ u16 kmisc = PERF_RECORD_MISC_KERNEL,
+ umisc = PERF_RECORD_MISC_USER;
+
+ if (!machine__is_host(machine)) {
+ kmisc = PERF_RECORD_MISC_GUEST_KERNEL;
+ umisc = PERF_RECORD_MISC_GUEST_USER;
+ }
+
+ err = __dsos__write_buildid_table(&machine->kernel_dsos, machine->pid,
+ kmisc, fd);
if (err == 0)
- err = __dsos__write_buildid_table(&dsos__user, fd);
+ err = __dsos__write_buildid_table(&machine->user_dsos,
+ machine->pid, umisc, fd);
+ return err;
+}
+
+static int dsos__write_buildid_table(struct perf_header *header, int fd)
+{
+ struct perf_session *session = container_of(header,
+ struct perf_session, header);
+ struct rb_node *nd;
+ int err = machine__write_buildid_table(&session->host_machine, fd);
+
+ if (err)
+ return err;
+
+ for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
+ struct machine *pos = rb_entry(nd, struct machine, rb_node);
+ err = machine__write_buildid_table(pos, fd);
+ if (err)
+ break;
+ }
return err;
}
-static int dso__cache_build_id(struct dso *self, const char *debugdir)
+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, *sbuild_id;
+ char *realname, *filename = zalloc(size),
+ *linkname = zalloc(size), *targetname;
int len, err = -1;
- if (filename == NULL || linkname == NULL)
+ if (is_kallsyms) {
+ if (symbol_conf.kptr_restrict) {
+ pr_debug("Not caching a kptr_restrict'ed /proc/kallsyms\n");
+ return 0;
+ }
+ realname = (char *)name;
+ } else
+ realname = realpath(name, NULL);
+
+ if (realname == NULL || filename == NULL || linkname == NULL)
goto out_free;
- len = snprintf(filename, size, "%s%s", debugdir, self->long_name);
+ len = scnprintf(filename, size, "%s%s%s",
+ debugdir, is_kallsyms ? "/" : "", realname);
if (mkdir_p(filename, 0755))
goto out_free;
- len += snprintf(filename + len, sizeof(filename) - len, "/");
- sbuild_id = filename + len;
- build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id);
+ snprintf(filename + len, size - len, "/%s", sbuild_id);
- if (access(filename, F_OK) && link(self->long_name, filename) &&
- copyfile(self->long_name, filename))
- goto out_free;
+ if (access(filename, F_OK)) {
+ if (is_kallsyms) {
+ if (copyfile("/proc/kallsyms", filename))
+ goto out_free;
+ } else if (link(realname, filename) && copyfile(name, filename))
+ goto out_free;
+ }
- len = snprintf(linkname, size, "%s/.build-id/%.2s",
+ len = scnprintf(linkname, size, "%s/.build-id/%.2s",
debugdir, sbuild_id);
if (access(linkname, X_OK) && mkdir_p(linkname, 0755))
if (symlink(targetname, linkname) == 0)
err = 0;
out_free:
+ if (!is_kallsyms)
+ free(realname);
+ 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 = zalloc(size),
+ *linkname = zalloc(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 - 1) < 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 *dso, const char *debugdir)
+{
+ bool is_kallsyms = dso->kernel && dso->long_name[0] != '/';
+
+ return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id),
+ dso->long_name, debugdir, is_kallsyms);
+}
+
static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir)
{
struct dso *pos;
return err;
}
-static int dsos__cache_build_ids(void)
+static int machine__cache_build_ids(struct machine *machine, const char *debugdir)
+{
+ int ret = __dsos__cache_build_ids(&machine->kernel_dsos, debugdir);
+ ret |= __dsos__cache_build_ids(&machine->user_dsos, debugdir);
+ return ret;
+}
+
+static int perf_session__cache_build_ids(struct perf_session *session)
{
- int err_kernel, err_user;
+ struct rb_node *nd;
+ int ret;
char debugdir[PATH_MAX];
- snprintf(debugdir, sizeof(debugdir), "%s/%s", getenv("HOME"),
- DEBUG_CACHE_DIR);
+ snprintf(debugdir, sizeof(debugdir), "%s", buildid_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;
+ ret = machine__cache_build_ids(&session->host_machine, debugdir);
+
+ for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
+ struct machine *pos = rb_entry(nd, struct machine, rb_node);
+ ret |= machine__cache_build_ids(pos, debugdir);
+ }
+ return ret ? -1 : 0;
}
-static int perf_header__adds_write(struct perf_header *self, int fd)
+static bool machine__read_build_ids(struct machine *machine, bool with_hits)
{
- int nr_sections;
- struct perf_file_section *feat_sec;
- int sec_size;
- u64 sec_start;
- int idx = 0, err;
+ bool ret = __dsos__read_build_ids(&machine->kernel_dsos, with_hits);
+ ret |= __dsos__read_build_ids(&machine->user_dsos, with_hits);
+ return ret;
+}
- if (dsos__read_build_ids())
- perf_header__set_feat(self, HEADER_BUILD_ID);
+static bool perf_session__read_build_ids(struct perf_session *session, bool with_hits)
+{
+ struct rb_node *nd;
+ bool ret = machine__read_build_ids(&session->host_machine, with_hits);
- nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
- if (!nr_sections)
- return 0;
+ for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
+ struct machine *pos = rb_entry(nd, struct machine, rb_node);
+ ret |= machine__read_build_ids(pos, with_hits);
+ }
- feat_sec = calloc(sizeof(*feat_sec), nr_sections);
- if (feat_sec == NULL)
- return -ENOMEM;
+ return ret;
+}
- sec_size = sizeof(*feat_sec) * nr_sections;
+static int write_trace_info(int fd, struct perf_header *h __used,
+ struct perf_evlist *evlist)
+{
+ return read_tracing_data(fd, &evlist->entries);
+}
- 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;
+static int write_build_id(int fd, struct perf_header *h,
+ struct perf_evlist *evlist __used)
+{
+ struct perf_session *session;
+ int err;
- trace_sec = &feat_sec[idx++];
+ session = container_of(h, struct perf_session, header);
- /* 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_session__read_build_ids(session, true))
+ return -1;
+ err = dsos__write_buildid_table(h, fd);
+ if (err < 0) {
+ pr_debug("failed to write buildid table\n");
+ return err;
+ }
+ if (!no_buildid_cache)
+ perf_session__cache_build_ids(session);
- if (perf_header__has_feat(self, HEADER_BUILD_ID)) {
- struct perf_file_section *buildid_sec;
+ return 0;
+}
- buildid_sec = &feat_sec[idx++];
+static int write_hostname(int fd, struct perf_header *h __used,
+ struct perf_evlist *evlist __used)
+{
+ struct utsname uts;
+ int ret;
- /* 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;
- dsos__cache_build_ids();
- }
+ ret = uname(&uts);
+ if (ret < 0)
+ return -1;
- 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;
+ return do_write_string(fd, uts.nodename);
}
-int perf_header__write(struct perf_header *self, int fd, bool at_exit)
+static int write_osrelease(int fd, struct perf_header *h __used,
+ struct perf_evlist *evlist __used)
{
- struct perf_file_header f_header;
- struct perf_file_attr f_attr;
- struct perf_header_attr *attr;
- int i, err;
+ struct utsname uts;
+ int ret;
- lseek(fd, sizeof(f_header), SEEK_SET);
+ ret = uname(&uts);
+ if (ret < 0)
+ return -1;
+ return do_write_string(fd, uts.release);
+}
- for (i = 0; i < self->attrs; i++) {
- attr = self->attr[i];
+static int write_arch(int fd, struct perf_header *h __used,
+ struct perf_evlist *evlist __used)
+{
+ struct utsname uts;
+ int ret;
- attr->id_offset = lseek(fd, 0, SEEK_CUR);
- err = do_write(fd, attr->id, attr->ids * sizeof(u64));
- if (err < 0) {
- pr_debug("failed to write perf header\n");
- return err;
- }
- }
+ ret = uname(&uts);
+ if (ret < 0)
+ return -1;
+ return do_write_string(fd, uts.machine);
+}
- self->attr_offset = lseek(fd, 0, SEEK_CUR);
+static int write_version(int fd, struct perf_header *h __used,
+ struct perf_evlist *evlist __used)
+{
+ return do_write_string(fd, perf_version_string);
+}
- for (i = 0; i < self->attrs; i++) {
- attr = self->attr[i];
+static int write_cpudesc(int fd, struct perf_header *h __used,
+ struct perf_evlist *evlist __used)
+{
+#ifndef CPUINFO_PROC
+#define CPUINFO_PROC NULL
+#endif
+ FILE *file;
+ char *buf = NULL;
+ char *s, *p;
+ const char *search = CPUINFO_PROC;
+ size_t len = 0;
+ int ret = -1;
+
+ if (!search)
+ return -1;
- f_attr = (struct perf_file_attr){
- .attr = attr->attr,
- .ids = {
- .offset = attr->id_offset,
- .size = attr->ids * sizeof(u64),
- }
- };
- err = do_write(fd, &f_attr, sizeof(f_attr));
- if (err < 0) {
- pr_debug("failed to write perf header attribute\n");
- return err;
- }
+ file = fopen("/proc/cpuinfo", "r");
+ if (!file)
+ return -1;
+
+ while (getline(&buf, &len, file) > 0) {
+ ret = strncmp(buf, search, strlen(search));
+ if (!ret)
+ break;
}
- 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;
+ if (ret)
+ goto done;
+
+ s = buf;
+
+ p = strchr(buf, ':');
+ if (p && *(p+1) == ' ' && *(p+2))
+ s = p + 2;
+ p = strchr(s, '\n');
+ if (p)
+ *p = '\0';
+
+ /* squash extra space characters (branding string) */
+ p = s;
+ while (*p) {
+ if (isspace(*p)) {
+ char *r = p + 1;
+ char *q = r;
+ *p = ' ';
+ while (*q && isspace(*q))
+ q++;
+ if (q != (p+1))
+ while ((*r++ = *q++));
}
+ p++;
}
+ ret = do_write_string(fd, s);
+done:
+ free(buf);
+ fclose(file);
+ return ret;
+}
- self->data_offset = lseek(fd, 0, SEEK_CUR);
+static int write_nrcpus(int fd, struct perf_header *h __used,
+ struct perf_evlist *evlist __used)
+{
+ long nr;
+ u32 nrc, nra;
+ int ret;
- if (at_exit) {
- err = perf_header__adds_write(self, fd);
- if (err < 0)
- return err;
- }
+ nr = sysconf(_SC_NPROCESSORS_CONF);
+ if (nr < 0)
+ return -1;
- f_header = (struct perf_file_header){
- .magic = PERF_MAGIC,
- .size = sizeof(f_header),
- .attr_size = sizeof(f_attr),
- .attrs = {
- .offset = self->attr_offset,
- .size = self->attrs * sizeof(f_attr),
- },
- .data = {
- .offset = self->data_offset,
- .size = self->data_size,
- },
- .event_types = {
- .offset = self->event_offset,
- .size = self->event_size,
- },
- };
+ nrc = (u32)(nr & UINT_MAX);
+
+ nr = sysconf(_SC_NPROCESSORS_ONLN);
+ if (nr < 0)
+ return -1;
- memcpy(&f_header.adds_features, &self->adds_features, sizeof(self->adds_features));
+ nra = (u32)(nr & UINT_MAX);
- lseek(fd, 0, SEEK_SET);
- 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);
+ ret = do_write(fd, &nrc, sizeof(nrc));
+ if (ret < 0)
+ return ret;
- self->frozen = 1;
- return 0;
+ return do_write(fd, &nra, sizeof(nra));
}
-static int do_read(int fd, void *buf, size_t size)
+static int write_event_desc(int fd, struct perf_header *h __used,
+ struct perf_evlist *evlist)
{
- while (size) {
- int ret = read(fd, buf, size);
-
- if (ret <= 0)
- return -1;
+ struct perf_evsel *attr;
+ u32 nre = 0, nri, sz;
+ int ret;
+
+ list_for_each_entry(attr, &evlist->entries, node)
+ nre++;
+
+ /*
+ * write number of events
+ */
+ ret = do_write(fd, &nre, sizeof(nre));
+ if (ret < 0)
+ return ret;
+
+ /*
+ * size of perf_event_attr struct
+ */
+ sz = (u32)sizeof(attr->attr);
+ ret = do_write(fd, &sz, sizeof(sz));
+ if (ret < 0)
+ return ret;
+
+ list_for_each_entry(attr, &evlist->entries, node) {
+
+ ret = do_write(fd, &attr->attr, sz);
+ if (ret < 0)
+ return ret;
+ /*
+ * write number of unique id per event
+ * there is one id per instance of an event
+ *
+ * copy into an nri to be independent of the
+ * type of ids,
+ */
+ nri = attr->ids;
+ ret = do_write(fd, &nri, sizeof(nri));
+ if (ret < 0)
+ return ret;
- size -= ret;
- buf += ret;
+ /*
+ * write event string as passed on cmdline
+ */
+ ret = do_write_string(fd, event_name(attr));
+ if (ret < 0)
+ return ret;
+ /*
+ * write unique ids for this event
+ */
+ ret = do_write(fd, attr->id, attr->ids * sizeof(u64));
+ if (ret < 0)
+ return ret;
}
-
return 0;
}
-int perf_header__process_sections(struct perf_header *self, int fd,
- int (*process)(struct perf_file_section *self,
- int feat, int fd))
+static int write_cmdline(int fd, struct perf_header *h __used,
+ struct perf_evlist *evlist __used)
{
- struct perf_file_section *feat_sec;
- int nr_sections;
- int sec_size;
- int idx = 0;
- int err = -1, 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)
+ char buf[MAXPATHLEN];
+ char proc[32];
+ u32 i, n;
+ int ret;
+
+ /*
+ * actual atual path to perf binary
+ */
+ sprintf(proc, "/proc/%d/exe", getpid());
+ ret = readlink(proc, buf, sizeof(buf));
+ if (ret <= 0)
return -1;
- sec_size = sizeof(*feat_sec) * nr_sections;
+ /* readlink() does not add null termination */
+ buf[ret] = '\0';
- lseek(fd, self->data_offset + self->data_size, SEEK_SET);
+ /* account for binary path */
+ n = header_argc + 1;
- if (do_read(fd, feat_sec, sec_size))
- goto out_free;
+ ret = do_write(fd, &n, sizeof(n));
+ if (ret < 0)
+ return ret;
- 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++];
+ ret = do_write_string(fd, buf);
+ if (ret < 0)
+ return ret;
- err = process(sec, feat, fd);
- if (err < 0)
- break;
- }
- ++feat;
+ for (i = 0 ; i < header_argc; i++) {
+ ret = do_write_string(fd, header_argv[i]);
+ if (ret < 0)
+ return ret;
}
-out_free:
- free(feat_sec);
- return err;
+ return 0;
}
-int perf_file_header__read(struct perf_file_header *self,
- struct perf_header *ph, int fd)
-{
- lseek(fd, 0, SEEK_SET);
+#define CORE_SIB_FMT \
+ "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list"
+#define THRD_SIB_FMT \
+ "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list"
- if (do_read(fd, self, sizeof(*self)) ||
- self->magic != PERF_MAGIC ||
- self->attr_size != sizeof(struct perf_file_attr))
- return -1;
+struct cpu_topo {
+ u32 core_sib;
+ u32 thread_sib;
+ char **core_siblings;
+ char **thread_siblings;
+};
- if (self->size != sizeof(*self)) {
+static int build_cpu_topo(struct cpu_topo *tp, int cpu)
+{
+ FILE *fp;
+ char filename[MAXPATHLEN];
+ char *buf = NULL, *p;
+ size_t len = 0;
+ u32 i = 0;
+ int ret = -1;
+
+ sprintf(filename, CORE_SIB_FMT, cpu);
+ fp = fopen(filename, "r");
+ if (!fp)
+ return -1;
+
+ if (getline(&buf, &len, fp) <= 0)
+ goto done;
+
+ fclose(fp);
+
+ p = strchr(buf, '\n');
+ if (p)
+ *p = '\0';
+
+ for (i = 0; i < tp->core_sib; i++) {
+ if (!strcmp(buf, tp->core_siblings[i]))
+ break;
+ }
+ if (i == tp->core_sib) {
+ tp->core_siblings[i] = buf;
+ tp->core_sib++;
+ buf = NULL;
+ len = 0;
+ }
+
+ sprintf(filename, THRD_SIB_FMT, cpu);
+ fp = fopen(filename, "r");
+ if (!fp)
+ goto done;
+
+ if (getline(&buf, &len, fp) <= 0)
+ goto done;
+
+ p = strchr(buf, '\n');
+ if (p)
+ *p = '\0';
+
+ for (i = 0; i < tp->thread_sib; i++) {
+ if (!strcmp(buf, tp->thread_siblings[i]))
+ break;
+ }
+ if (i == tp->thread_sib) {
+ tp->thread_siblings[i] = buf;
+ tp->thread_sib++;
+ buf = NULL;
+ }
+ ret = 0;
+done:
+ if(fp)
+ fclose(fp);
+ free(buf);
+ return ret;
+}
+
+static void free_cpu_topo(struct cpu_topo *tp)
+{
+ u32 i;
+
+ if (!tp)
+ return;
+
+ for (i = 0 ; i < tp->core_sib; i++)
+ free(tp->core_siblings[i]);
+
+ for (i = 0 ; i < tp->thread_sib; i++)
+ free(tp->thread_siblings[i]);
+
+ free(tp);
+}
+
+static struct cpu_topo *build_cpu_topology(void)
+{
+ struct cpu_topo *tp;
+ void *addr;
+ u32 nr, i;
+ size_t sz;
+ long ncpus;
+ int ret = -1;
+
+ ncpus = sysconf(_SC_NPROCESSORS_CONF);
+ if (ncpus < 0)
+ return NULL;
+
+ nr = (u32)(ncpus & UINT_MAX);
+
+ sz = nr * sizeof(char *);
+
+ addr = calloc(1, sizeof(*tp) + 2 * sz);
+ if (!addr)
+ return NULL;
+
+ tp = addr;
+
+ addr += sizeof(*tp);
+ tp->core_siblings = addr;
+ addr += sz;
+ tp->thread_siblings = addr;
+
+ for (i = 0; i < nr; i++) {
+ ret = build_cpu_topo(tp, i);
+ if (ret < 0)
+ break;
+ }
+ if (ret) {
+ free_cpu_topo(tp);
+ tp = NULL;
+ }
+ return tp;
+}
+
+static int write_cpu_topology(int fd, struct perf_header *h __used,
+ struct perf_evlist *evlist __used)
+{
+ struct cpu_topo *tp;
+ u32 i;
+ int ret;
+
+ tp = build_cpu_topology();
+ if (!tp)
+ return -1;
+
+ ret = do_write(fd, &tp->core_sib, sizeof(tp->core_sib));
+ if (ret < 0)
+ goto done;
+
+ for (i = 0; i < tp->core_sib; i++) {
+ ret = do_write_string(fd, tp->core_siblings[i]);
+ if (ret < 0)
+ goto done;
+ }
+ ret = do_write(fd, &tp->thread_sib, sizeof(tp->thread_sib));
+ if (ret < 0)
+ goto done;
+
+ for (i = 0; i < tp->thread_sib; i++) {
+ ret = do_write_string(fd, tp->thread_siblings[i]);
+ if (ret < 0)
+ break;
+ }
+done:
+ free_cpu_topo(tp);
+ return ret;
+}
+
+
+
+static int write_total_mem(int fd, struct perf_header *h __used,
+ struct perf_evlist *evlist __used)
+{
+ char *buf = NULL;
+ FILE *fp;
+ size_t len = 0;
+ int ret = -1, n;
+ uint64_t mem;
+
+ fp = fopen("/proc/meminfo", "r");
+ if (!fp)
+ return -1;
+
+ while (getline(&buf, &len, fp) > 0) {
+ ret = strncmp(buf, "MemTotal:", 9);
+ if (!ret)
+ break;
+ }
+ if (!ret) {
+ n = sscanf(buf, "%*s %"PRIu64, &mem);
+ if (n == 1)
+ ret = do_write(fd, &mem, sizeof(mem));
+ }
+ free(buf);
+ fclose(fp);
+ return ret;
+}
+
+static int write_topo_node(int fd, int node)
+{
+ char str[MAXPATHLEN];
+ char field[32];
+ char *buf = NULL, *p;
+ size_t len = 0;
+ FILE *fp;
+ u64 mem_total, mem_free, mem;
+ int ret = -1;
+
+ sprintf(str, "/sys/devices/system/node/node%d/meminfo", node);
+ fp = fopen(str, "r");
+ if (!fp)
+ return -1;
+
+ while (getline(&buf, &len, fp) > 0) {
+ /* skip over invalid lines */
+ if (!strchr(buf, ':'))
+ continue;
+ if (sscanf(buf, "%*s %*d %s %"PRIu64, field, &mem) != 2)
+ goto done;
+ if (!strcmp(field, "MemTotal:"))
+ mem_total = mem;
+ if (!strcmp(field, "MemFree:"))
+ mem_free = mem;
+ }
+
+ fclose(fp);
+
+ ret = do_write(fd, &mem_total, sizeof(u64));
+ if (ret)
+ goto done;
+
+ ret = do_write(fd, &mem_free, sizeof(u64));
+ if (ret)
+ goto done;
+
+ ret = -1;
+ sprintf(str, "/sys/devices/system/node/node%d/cpulist", node);
+
+ fp = fopen(str, "r");
+ if (!fp)
+ goto done;
+
+ if (getline(&buf, &len, fp) <= 0)
+ goto done;
+
+ p = strchr(buf, '\n');
+ if (p)
+ *p = '\0';
+
+ ret = do_write_string(fd, buf);
+done:
+ free(buf);
+ fclose(fp);
+ return ret;
+}
+
+static int write_numa_topology(int fd, struct perf_header *h __used,
+ struct perf_evlist *evlist __used)
+{
+ char *buf = NULL;
+ size_t len = 0;
+ FILE *fp;
+ struct cpu_map *node_map = NULL;
+ char *c;
+ u32 nr, i, j;
+ int ret = -1;
+
+ fp = fopen("/sys/devices/system/node/online", "r");
+ if (!fp)
+ return -1;
+
+ if (getline(&buf, &len, fp) <= 0)
+ goto done;
+
+ c = strchr(buf, '\n');
+ if (c)
+ *c = '\0';
+
+ node_map = cpu_map__new(buf);
+ if (!node_map)
+ goto done;
+
+ nr = (u32)node_map->nr;
+
+ ret = do_write(fd, &nr, sizeof(nr));
+ if (ret < 0)
+ goto done;
+
+ for (i = 0; i < nr; i++) {
+ j = (u32)node_map->map[i];
+ ret = do_write(fd, &j, sizeof(j));
+ if (ret < 0)
+ break;
+
+ ret = write_topo_node(fd, i);
+ if (ret < 0)
+ break;
+ }
+done:
+ free(buf);
+ fclose(fp);
+ free(node_map);
+ return ret;
+}
+
+/*
+ * default get_cpuid(): nothing gets recorded
+ * actual implementation must be in arch/$(ARCH)/util/header.c
+ */
+int __attribute__((weak)) get_cpuid(char *buffer __used, size_t sz __used)
+{
+ return -1;
+}
+
+static int write_cpuid(int fd, struct perf_header *h __used,
+ struct perf_evlist *evlist __used)
+{
+ char buffer[64];
+ int ret;
+
+ ret = get_cpuid(buffer, sizeof(buffer));
+ if (!ret)
+ goto write_it;
+
+ return -1;
+write_it:
+ return do_write_string(fd, buffer);
+}
+
+static int write_branch_stack(int fd __used, struct perf_header *h __used,
+ struct perf_evlist *evlist __used)
+{
+ return 0;
+}
+
+static void print_hostname(struct perf_header *ph, int fd, FILE *fp)
+{
+ char *str = do_read_string(fd, ph);
+ fprintf(fp, "# hostname : %s\n", str);
+ free(str);
+}
+
+static void print_osrelease(struct perf_header *ph, int fd, FILE *fp)
+{
+ char *str = do_read_string(fd, ph);
+ fprintf(fp, "# os release : %s\n", str);
+ free(str);
+}
+
+static void print_arch(struct perf_header *ph, int fd, FILE *fp)
+{
+ char *str = do_read_string(fd, ph);
+ fprintf(fp, "# arch : %s\n", str);
+ free(str);
+}
+
+static void print_cpudesc(struct perf_header *ph, int fd, FILE *fp)
+{
+ char *str = do_read_string(fd, ph);
+ fprintf(fp, "# cpudesc : %s\n", str);
+ free(str);
+}
+
+static void print_nrcpus(struct perf_header *ph, int fd, FILE *fp)
+{
+ ssize_t ret;
+ u32 nr;
+
+ ret = read(fd, &nr, sizeof(nr));
+ if (ret != (ssize_t)sizeof(nr))
+ nr = -1; /* interpreted as error */
+
+ if (ph->needs_swap)
+ nr = bswap_32(nr);
+
+ fprintf(fp, "# nrcpus online : %u\n", nr);
+
+ ret = read(fd, &nr, sizeof(nr));
+ if (ret != (ssize_t)sizeof(nr))
+ nr = -1; /* interpreted as error */
+
+ if (ph->needs_swap)
+ nr = bswap_32(nr);
+
+ fprintf(fp, "# nrcpus avail : %u\n", nr);
+}
+
+static void print_version(struct perf_header *ph, int fd, FILE *fp)
+{
+ char *str = do_read_string(fd, ph);
+ fprintf(fp, "# perf version : %s\n", str);
+ free(str);
+}
+
+static void print_cmdline(struct perf_header *ph, int fd, FILE *fp)
+{
+ ssize_t ret;
+ char *str;
+ u32 nr, i;
+
+ ret = read(fd, &nr, sizeof(nr));
+ if (ret != (ssize_t)sizeof(nr))
+ return;
+
+ if (ph->needs_swap)
+ nr = bswap_32(nr);
+
+ fprintf(fp, "# cmdline : ");
+
+ for (i = 0; i < nr; i++) {
+ str = do_read_string(fd, ph);
+ fprintf(fp, "%s ", str);
+ free(str);
+ }
+ fputc('\n', fp);
+}
+
+static void print_cpu_topology(struct perf_header *ph, int fd, FILE *fp)
+{
+ ssize_t ret;
+ u32 nr, i;
+ char *str;
+
+ ret = read(fd, &nr, sizeof(nr));
+ if (ret != (ssize_t)sizeof(nr))
+ return;
+
+ if (ph->needs_swap)
+ nr = bswap_32(nr);
+
+ for (i = 0; i < nr; i++) {
+ str = do_read_string(fd, ph);
+ fprintf(fp, "# sibling cores : %s\n", str);
+ free(str);
+ }
+
+ ret = read(fd, &nr, sizeof(nr));
+ if (ret != (ssize_t)sizeof(nr))
+ return;
+
+ if (ph->needs_swap)
+ nr = bswap_32(nr);
+
+ for (i = 0; i < nr; i++) {
+ str = do_read_string(fd, ph);
+ fprintf(fp, "# sibling threads : %s\n", str);
+ free(str);
+ }
+}
+
+static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
+{
+ struct perf_event_attr attr;
+ uint64_t id;
+ void *buf = NULL;
+ char *str;
+ u32 nre, sz, nr, i, j;
+ ssize_t ret;
+ size_t msz;
+
+ /* number of events */
+ ret = read(fd, &nre, sizeof(nre));
+ if (ret != (ssize_t)sizeof(nre))
+ goto error;
+
+ if (ph->needs_swap)
+ nre = bswap_32(nre);
+
+ ret = read(fd, &sz, sizeof(sz));
+ if (ret != (ssize_t)sizeof(sz))
+ goto error;
+
+ if (ph->needs_swap)
+ sz = bswap_32(sz);
+
+ memset(&attr, 0, sizeof(attr));
+
+ /* buffer to hold on file attr struct */
+ buf = malloc(sz);
+ if (!buf)
+ goto error;
+
+ msz = sizeof(attr);
+ if (sz < msz)
+ msz = sz;
+
+ for (i = 0 ; i < nre; i++) {
+
+ /*
+ * must read entire on-file attr struct to
+ * sync up with layout.
+ */
+ ret = read(fd, buf, sz);
+ if (ret != (ssize_t)sz)
+ goto error;
+
+ if (ph->needs_swap)
+ perf_event__attr_swap(buf);
+
+ memcpy(&attr, buf, msz);
+
+ ret = read(fd, &nr, sizeof(nr));
+ if (ret != (ssize_t)sizeof(nr))
+ goto error;
+
+ if (ph->needs_swap)
+ nr = bswap_32(nr);
+
+ str = do_read_string(fd, ph);
+ fprintf(fp, "# event : name = %s, ", str);
+ free(str);
+
+ fprintf(fp, "type = %d, config = 0x%"PRIx64
+ ", config1 = 0x%"PRIx64", config2 = 0x%"PRIx64,
+ attr.type,
+ (u64)attr.config,
+ (u64)attr.config1,
+ (u64)attr.config2);
+
+ fprintf(fp, ", excl_usr = %d, excl_kern = %d",
+ attr.exclude_user,
+ attr.exclude_kernel);
+
+ if (nr)
+ fprintf(fp, ", id = {");
+
+ for (j = 0 ; j < nr; j++) {
+ ret = read(fd, &id, sizeof(id));
+ if (ret != (ssize_t)sizeof(id))
+ goto error;
+
+ if (ph->needs_swap)
+ id = bswap_64(id);
+
+ if (j)
+ fputc(',', fp);
+
+ fprintf(fp, " %"PRIu64, id);
+ }
+ if (nr && j == nr)
+ fprintf(fp, " }");
+ fputc('\n', fp);
+ }
+ free(buf);
+ return;
+error:
+ fprintf(fp, "# event desc: not available or unable to read\n");
+}
+
+static void print_total_mem(struct perf_header *h __used, int fd, FILE *fp)
+{
+ uint64_t mem;
+ ssize_t ret;
+
+ ret = read(fd, &mem, sizeof(mem));
+ if (ret != sizeof(mem))
+ goto error;
+
+ if (h->needs_swap)
+ mem = bswap_64(mem);
+
+ fprintf(fp, "# total memory : %"PRIu64" kB\n", mem);
+ return;
+error:
+ fprintf(fp, "# total memory : unknown\n");
+}
+
+static void print_numa_topology(struct perf_header *h __used, int fd, FILE *fp)
+{
+ ssize_t ret;
+ u32 nr, c, i;
+ char *str;
+ uint64_t mem_total, mem_free;
+
+ /* nr nodes */
+ ret = read(fd, &nr, sizeof(nr));
+ if (ret != (ssize_t)sizeof(nr))
+ goto error;
+
+ if (h->needs_swap)
+ nr = bswap_32(nr);
+
+ for (i = 0; i < nr; i++) {
+
+ /* node number */
+ ret = read(fd, &c, sizeof(c));
+ if (ret != (ssize_t)sizeof(c))
+ goto error;
+
+ if (h->needs_swap)
+ c = bswap_32(c);
+
+ ret = read(fd, &mem_total, sizeof(u64));
+ if (ret != sizeof(u64))
+ goto error;
+
+ ret = read(fd, &mem_free, sizeof(u64));
+ if (ret != sizeof(u64))
+ goto error;
+
+ if (h->needs_swap) {
+ mem_total = bswap_64(mem_total);
+ mem_free = bswap_64(mem_free);
+ }
+
+ fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
+ " free = %"PRIu64" kB\n",
+ c,
+ mem_total,
+ mem_free);
+
+ str = do_read_string(fd, h);
+ fprintf(fp, "# node%u cpu list : %s\n", c, str);
+ free(str);
+ }
+ return;
+error:
+ fprintf(fp, "# numa topology : not available\n");
+}
+
+static void print_cpuid(struct perf_header *ph, int fd, FILE *fp)
+{
+ char *str = do_read_string(fd, ph);
+ fprintf(fp, "# cpuid : %s\n", str);
+ free(str);
+}
+
+static void print_branch_stack(struct perf_header *ph __used, int fd __used,
+ FILE *fp)
+{
+ fprintf(fp, "# contains samples with branch stack\n");
+}
+
+static int __event_process_build_id(struct build_id_event *bev,
+ char *filename,
+ struct perf_session *session)
+{
+ int err = -1;
+ struct list_head *head;
+ struct machine *machine;
+ u16 misc;
+ struct dso *dso;
+ enum dso_kernel_type dso_type;
+
+ machine = perf_session__findnew_machine(session, bev->pid);
+ if (!machine)
+ goto out;
+
+ misc = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
+
+ switch (misc) {
+ case PERF_RECORD_MISC_KERNEL:
+ dso_type = DSO_TYPE_KERNEL;
+ head = &machine->kernel_dsos;
+ break;
+ case PERF_RECORD_MISC_GUEST_KERNEL:
+ dso_type = DSO_TYPE_GUEST_KERNEL;
+ head = &machine->kernel_dsos;
+ break;
+ case PERF_RECORD_MISC_USER:
+ case PERF_RECORD_MISC_GUEST_USER:
+ dso_type = DSO_TYPE_USER;
+ head = &machine->user_dsos;
+ break;
+ default:
+ goto out;
+ }
+
+ dso = __dsos__findnew(head, filename);
+ if (dso != NULL) {
+ char sbuild_id[BUILD_ID_SIZE * 2 + 1];
+
+ dso__set_build_id(dso, &bev->build_id);
+
+ if (filename[0] == '[')
+ dso->kernel = dso_type;
+
+ build_id__sprintf(dso->build_id, sizeof(dso->build_id),
+ sbuild_id);
+ pr_debug("build id event received for %s: %s\n",
+ dso->long_name, sbuild_id);
+ }
+
+ err = 0;
+out:
+ return err;
+}
+
+static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
+ int input, u64 offset, u64 size)
+{
+ struct perf_session *session = container_of(header, struct perf_session, header);
+ struct {
+ struct perf_event_header header;
+ u8 build_id[ALIGN(BUILD_ID_SIZE, sizeof(u64))];
+ char filename[0];
+ } old_bev;
+ struct build_id_event bev;
+ char filename[PATH_MAX];
+ u64 limit = offset + size;
+
+ while (offset < limit) {
+ ssize_t len;
+
+ if (read(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
+ return -1;
+
+ if (header->needs_swap)
+ perf_event_header__bswap(&old_bev.header);
+
+ len = old_bev.header.size - sizeof(old_bev);
+ if (read(input, filename, len) != len)
+ return -1;
+
+ bev.header = old_bev.header;
+
+ /*
+ * As the pid is the missing value, we need to fill
+ * it properly. The header.misc value give us nice hint.
+ */
+ bev.pid = HOST_KERNEL_ID;
+ if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
+ bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
+ bev.pid = DEFAULT_GUEST_KERNEL_ID;
+
+ memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
+ __event_process_build_id(&bev, filename, session);
+
+ offset += bev.header.size;
+ }
+
+ return 0;
+}
+
+static int perf_header__read_build_ids(struct perf_header *header,
+ int input, u64 offset, u64 size)
+{
+ struct perf_session *session = container_of(header, struct perf_session, header);
+ struct build_id_event bev;
+ char filename[PATH_MAX];
+ u64 limit = offset + size, orig_offset = offset;
+ int err = -1;
+
+ while (offset < limit) {
+ ssize_t len;
+
+ if (read(input, &bev, sizeof(bev)) != sizeof(bev))
+ goto out;
+
+ if (header->needs_swap)
+ perf_event_header__bswap(&bev.header);
+
+ len = bev.header.size - sizeof(bev);
+ if (read(input, filename, len) != len)
+ goto out;
+ /*
+ * The a1645ce1 changeset:
+ *
+ * "perf: 'perf kvm' tool for monitoring guest performance from host"
+ *
+ * Added a field to struct build_id_event that broke the file
+ * format.
+ *
+ * Since the kernel build-id is the first entry, process the
+ * table using the old format if the well known
+ * '[kernel.kallsyms]' string for the kernel build-id has the
+ * first 4 characters chopped off (where the pid_t sits).
+ */
+ if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
+ if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
+ return -1;
+ return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
+ }
+
+ __event_process_build_id(&bev, filename, session);
+
+ offset += bev.header.size;
+ }
+ err = 0;
+out:
+ return err;
+}
+
+static int process_trace_info(struct perf_file_section *section __unused,
+ struct perf_header *ph __unused,
+ int feat __unused, int fd)
+{
+ trace_report(fd, false);
+ return 0;
+}
+
+static int process_build_id(struct perf_file_section *section,
+ struct perf_header *ph,
+ int feat __unused, int fd)
+{
+ if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
+ pr_debug("Failed to read buildids, continuing...\n");
+ return 0;
+}
+
+struct feature_ops {
+ int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
+ void (*print)(struct perf_header *h, int fd, FILE *fp);
+ int (*process)(struct perf_file_section *section,
+ struct perf_header *h, int feat, int fd);
+ const char *name;
+ bool full_only;
+};
+
+#define FEAT_OPA(n, func) \
+ [n] = { .name = #n, .write = write_##func, .print = print_##func }
+#define FEAT_OPP(n, func) \
+ [n] = { .name = #n, .write = write_##func, .print = print_##func, \
+ .process = process_##func }
+#define FEAT_OPF(n, func) \
+ [n] = { .name = #n, .write = write_##func, .print = print_##func, \
+ .full_only = true }
+
+/* feature_ops not implemented: */
+#define print_trace_info NULL
+#define print_build_id NULL
+
+static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
+ FEAT_OPP(HEADER_TRACE_INFO, trace_info),
+ FEAT_OPP(HEADER_BUILD_ID, build_id),
+ FEAT_OPA(HEADER_HOSTNAME, hostname),
+ FEAT_OPA(HEADER_OSRELEASE, osrelease),
+ FEAT_OPA(HEADER_VERSION, version),
+ FEAT_OPA(HEADER_ARCH, arch),
+ FEAT_OPA(HEADER_NRCPUS, nrcpus),
+ FEAT_OPA(HEADER_CPUDESC, cpudesc),
+ FEAT_OPA(HEADER_CPUID, cpuid),
+ FEAT_OPA(HEADER_TOTAL_MEM, total_mem),
+ FEAT_OPA(HEADER_EVENT_DESC, event_desc),
+ FEAT_OPA(HEADER_CMDLINE, cmdline),
+ FEAT_OPF(HEADER_CPU_TOPOLOGY, cpu_topology),
+ FEAT_OPF(HEADER_NUMA_TOPOLOGY, numa_topology),
+ FEAT_OPA(HEADER_BRANCH_STACK, branch_stack),
+};
+
+struct header_print_data {
+ FILE *fp;
+ bool full; /* extended list of headers */
+};
+
+static int perf_file_section__fprintf_info(struct perf_file_section *section,
+ struct perf_header *ph,
+ int feat, int fd, void *data)
+{
+ struct header_print_data *hd = data;
+
+ if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
+ pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
+ "%d, continuing...\n", section->offset, feat);
+ return 0;
+ }
+ if (feat >= HEADER_LAST_FEATURE) {
+ pr_warning("unknown feature %d\n", feat);
+ return 0;
+ }
+ if (!feat_ops[feat].print)
+ return 0;
+
+ if (!feat_ops[feat].full_only || hd->full)
+ feat_ops[feat].print(ph, fd, hd->fp);
+ else
+ fprintf(hd->fp, "# %s info available, use -I to display\n",
+ feat_ops[feat].name);
+
+ return 0;
+}
+
+int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
+{
+ struct header_print_data hd;
+ struct perf_header *header = &session->header;
+ int fd = session->fd;
+ hd.fp = fp;
+ hd.full = full;
+
+ perf_header__process_sections(header, fd, &hd,
+ perf_file_section__fprintf_info);
+ return 0;
+}
+
+static int do_write_feat(int fd, struct perf_header *h, int type,
+ struct perf_file_section **p,
+ struct perf_evlist *evlist)
+{
+ int err;
+ int ret = 0;
+
+ if (perf_header__has_feat(h, type)) {
+ if (!feat_ops[type].write)
+ return -1;
+
+ (*p)->offset = lseek(fd, 0, SEEK_CUR);
+
+ err = feat_ops[type].write(fd, h, evlist);
+ if (err < 0) {
+ pr_debug("failed to write feature %d\n", type);
+
+ /* undo anything written */
+ lseek(fd, (*p)->offset, SEEK_SET);
+
+ return -1;
+ }
+ (*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset;
+ (*p)++;
+ }
+ return ret;
+}
+
+static int perf_header__adds_write(struct perf_header *header,
+ struct perf_evlist *evlist, int fd)
+{
+ int nr_sections;
+ struct perf_file_section *feat_sec, *p;
+ int sec_size;
+ u64 sec_start;
+ int feat;
+ int err;
+
+ nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
+ if (!nr_sections)
+ return 0;
+
+ feat_sec = p = calloc(sizeof(*feat_sec), nr_sections);
+ if (feat_sec == NULL)
+ return -ENOMEM;
+
+ sec_size = sizeof(*feat_sec) * nr_sections;
+
+ sec_start = header->data_offset + header->data_size;
+ lseek(fd, sec_start + sec_size, SEEK_SET);
+
+ for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
+ if (do_write_feat(fd, header, feat, &p, evlist))
+ perf_header__clear_feat(header, feat);
+ }
+
+ lseek(fd, sec_start, SEEK_SET);
+ /*
+ * may write more than needed due to dropped feature, but
+ * this is okay, reader will skip the mising entries
+ */
+ err = do_write(fd, feat_sec, sec_size);
+ if (err < 0)
+ pr_debug("failed to write feature section\n");
+ free(feat_sec);
+ return err;
+}
+
+int perf_header__write_pipe(int fd)
+{
+ struct perf_pipe_file_header f_header;
+ int err;
+
+ f_header = (struct perf_pipe_file_header){
+ .magic = PERF_MAGIC,
+ .size = sizeof(f_header),
+ };
+
+ err = do_write(fd, &f_header, sizeof(f_header));
+ if (err < 0) {
+ pr_debug("failed to write perf pipe header\n");
+ return err;
+ }
+
+ return 0;
+}
+
+int perf_session__write_header(struct perf_session *session,
+ struct perf_evlist *evlist,
+ int fd, bool at_exit)
+{
+ struct perf_file_header f_header;
+ struct perf_file_attr f_attr;
+ struct perf_header *header = &session->header;
+ struct perf_evsel *attr, *pair = NULL;
+ int err;
+
+ lseek(fd, sizeof(f_header), SEEK_SET);
+
+ if (session->evlist != evlist)
+ pair = list_entry(session->evlist->entries.next, struct perf_evsel, node);
+
+ list_for_each_entry(attr, &evlist->entries, node) {
+ attr->id_offset = lseek(fd, 0, SEEK_CUR);
+ err = do_write(fd, attr->id, attr->ids * sizeof(u64));
+ if (err < 0) {
+out_err_write:
+ pr_debug("failed to write perf header\n");
+ return err;
+ }
+ if (session->evlist != evlist) {
+ err = do_write(fd, pair->id, pair->ids * sizeof(u64));
+ if (err < 0)
+ goto out_err_write;
+ attr->ids += pair->ids;
+ pair = list_entry(pair->node.next, struct perf_evsel, node);
+ }
+ }
+
+ header->attr_offset = lseek(fd, 0, SEEK_CUR);
+
+ list_for_each_entry(attr, &evlist->entries, node) {
+ f_attr = (struct perf_file_attr){
+ .attr = attr->attr,
+ .ids = {
+ .offset = attr->id_offset,
+ .size = attr->ids * sizeof(u64),
+ }
+ };
+ err = do_write(fd, &f_attr, sizeof(f_attr));
+ if (err < 0) {
+ pr_debug("failed to write perf header attribute\n");
+ return err;
+ }
+ }
+
+ header->event_offset = lseek(fd, 0, SEEK_CUR);
+ header->event_size = event_count * sizeof(struct perf_trace_event_type);
+ if (events) {
+ err = do_write(fd, events, header->event_size);
+ if (err < 0) {
+ pr_debug("failed to write perf header events\n");
+ return err;
+ }
+ }
+
+ header->data_offset = lseek(fd, 0, SEEK_CUR);
+
+ if (at_exit) {
+ err = perf_header__adds_write(header, evlist, fd);
+ if (err < 0)
+ return err;
+ }
+
+ f_header = (struct perf_file_header){
+ .magic = PERF_MAGIC,
+ .size = sizeof(f_header),
+ .attr_size = sizeof(f_attr),
+ .attrs = {
+ .offset = header->attr_offset,
+ .size = evlist->nr_entries * sizeof(f_attr),
+ },
+ .data = {
+ .offset = header->data_offset,
+ .size = header->data_size,
+ },
+ .event_types = {
+ .offset = header->event_offset,
+ .size = header->event_size,
+ },
+ };
+
+ memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
+
+ lseek(fd, 0, SEEK_SET);
+ err = do_write(fd, &f_header, sizeof(f_header));
+ if (err < 0) {
+ pr_debug("failed to write perf header\n");
+ return err;
+ }
+ lseek(fd, header->data_offset + header->data_size, SEEK_SET);
+
+ header->frozen = 1;
+ return 0;
+}
+
+static int perf_header__getbuffer64(struct perf_header *header,
+ int fd, void *buf, size_t size)
+{
+ if (readn(fd, buf, size) <= 0)
+ return -1;
+
+ if (header->needs_swap)
+ mem_bswap_64(buf, size);
+
+ return 0;
+}
+
+int perf_header__process_sections(struct perf_header *header, int fd,
+ void *data,
+ int (*process)(struct perf_file_section *section,
+ struct perf_header *ph,
+ int feat, int fd, void *data))
+{
+ struct perf_file_section *feat_sec, *sec;
+ int nr_sections;
+ int sec_size;
+ int feat;
+ int err;
+
+ nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
+ if (!nr_sections)
+ return 0;
+
+ feat_sec = sec = calloc(sizeof(*feat_sec), nr_sections);
+ if (!feat_sec)
+ return -1;
+
+ sec_size = sizeof(*feat_sec) * nr_sections;
+
+ lseek(fd, header->data_offset + header->data_size, SEEK_SET);
+
+ err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
+ if (err < 0)
+ goto out_free;
+
+ for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
+ err = process(sec++, header, feat, fd, data);
+ if (err < 0)
+ goto out_free;
+ }
+ err = 0;
+out_free:
+ free(feat_sec);
+ return err;
+}
+
+static const int attr_file_abi_sizes[] = {
+ [0] = PERF_ATTR_SIZE_VER0,
+ [1] = PERF_ATTR_SIZE_VER1,
+ 0,
+};
+
+/*
+ * In the legacy file format, the magic number is not used to encode endianness.
+ * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
+ * on ABI revisions, we need to try all combinations for all endianness to
+ * detect the endianness.
+ */
+static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
+{
+ uint64_t ref_size, attr_size;
+ int i;
+
+ for (i = 0 ; attr_file_abi_sizes[i]; i++) {
+ ref_size = attr_file_abi_sizes[i]
+ + sizeof(struct perf_file_section);
+ if (hdr_sz != ref_size) {
+ attr_size = bswap_64(hdr_sz);
+ if (attr_size != ref_size)
+ continue;
+
+ ph->needs_swap = true;
+ }
+ pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
+ i,
+ ph->needs_swap);
+ return 0;
+ }
+ /* could not determine endianness */
+ return -1;
+}
+
+#define PERF_PIPE_HDR_VER0 16
+
+static const size_t attr_pipe_abi_sizes[] = {
+ [0] = PERF_PIPE_HDR_VER0,
+ 0,
+};
+
+/*
+ * In the legacy pipe format, there is an implicit assumption that endiannesss
+ * between host recording the samples, and host parsing the samples is the
+ * same. This is not always the case given that the pipe output may always be
+ * redirected into a file and analyzed on a different machine with possibly a
+ * different endianness and perf_event ABI revsions in the perf tool itself.
+ */
+static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
+{
+ u64 attr_size;
+ int i;
+
+ for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
+ if (hdr_sz != attr_pipe_abi_sizes[i]) {
+ attr_size = bswap_64(hdr_sz);
+ if (attr_size != hdr_sz)
+ continue;
+
+ ph->needs_swap = true;
+ }
+ pr_debug("Pipe ABI%d perf.data file detected\n", i);
+ return 0;
+ }
+ return -1;
+}
+
+static int check_magic_endian(u64 magic, uint64_t hdr_sz,
+ bool is_pipe, struct perf_header *ph)
+{
+ int ret;
+
+ /* check for legacy format */
+ ret = memcmp(&magic, __perf_magic1, sizeof(magic));
+ if (ret == 0) {
+ pr_debug("legacy perf.data format\n");
+ if (is_pipe)
+ return try_all_pipe_abis(hdr_sz, ph);
+
+ return try_all_file_abis(hdr_sz, ph);
+ }
+ /*
+ * the new magic number serves two purposes:
+ * - unique number to identify actual perf.data files
+ * - encode endianness of file
+ */
+
+ /* check magic number with one endianness */
+ if (magic == __perf_magic2)
+ return 0;
+
+ /* check magic number with opposite endianness */
+ if (magic != __perf_magic2_sw)
+ return -1;
+
+ ph->needs_swap = true;
+
+ return 0;
+}
+
+int perf_file_header__read(struct perf_file_header *header,
+ struct perf_header *ph, int fd)
+{
+ int ret;
+
+ lseek(fd, 0, SEEK_SET);
+
+ ret = readn(fd, header, sizeof(*header));
+ if (ret <= 0)
+ return -1;
+
+ if (check_magic_endian(header->magic,
+ header->attr_size, false, ph) < 0) {
+ pr_debug("magic/endian check failed\n");
+ return -1;
+ }
+
+ if (ph->needs_swap) {
+ mem_bswap_64(header, offsetof(struct perf_file_header,
+ adds_features));
+ }
+
+ if (header->size != sizeof(*header)) {
/* Support the previous format */
- if (self->size == offsetof(typeof(*self), adds_features))
- bitmap_zero(self->adds_features, HEADER_FEAT_BITS);
+ if (header->size == offsetof(typeof(*header), adds_features))
+ bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
else
return -1;
+ } else if (ph->needs_swap) {
+ unsigned int i;
+ /*
+ * feature bitmap is declared as an array of unsigned longs --
+ * not good since its size can differ between the host that
+ * generated the data file and the host analyzing the file.
+ *
+ * We need to handle endianness, but we don't know the size of
+ * the unsigned long where the file was generated. Take a best
+ * guess at determining it: try 64-bit swap first (ie., file
+ * created on a 64-bit host), and check if the hostname feature
+ * bit is set (this feature bit is forced on as of fbe96f2).
+ * If the bit is not, undo the 64-bit swap and try a 32-bit
+ * swap. If the hostname bit is still not set (e.g., older data
+ * file), punt and fallback to the original behavior --
+ * clearing all feature bits and setting buildid.
+ */
+ for (i = 0; i < BITS_TO_LONGS(HEADER_FEAT_BITS); ++i)
+ header->adds_features[i] = bswap_64(header->adds_features[i]);
+
+ if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
+ for (i = 0; i < BITS_TO_LONGS(HEADER_FEAT_BITS); ++i) {
+ header->adds_features[i] = bswap_64(header->adds_features[i]);
+ header->adds_features[i] = bswap_32(header->adds_features[i]);
+ }
+ }
+
+ if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
+ bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
+ set_bit(HEADER_BUILD_ID, header->adds_features);
+ }
}
- memcpy(&ph->adds_features, &self->adds_features,
- sizeof(self->adds_features));
+ memcpy(&ph->adds_features, &header->adds_features,
+ sizeof(ph->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;
+ ph->event_offset = header->event_types.offset;
+ ph->event_size = header->event_types.size;
+ ph->data_offset = header->data.offset;
+ ph->data_size = header->data.size;
return 0;
}
-static int perf_file_section__process(struct perf_file_section *self,
- int feat, int fd)
+static int perf_file_section__process(struct perf_file_section *section,
+ struct perf_header *ph,
+ int feat, int fd, void *data __used)
{
- if (lseek(fd, self->offset, SEEK_SET) < 0) {
- pr_debug("Failed to lseek to %Ld offset for feature %d, "
- "continuing...\n", self->offset, feat);
+ if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
+ pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
+ "%d, continuing...\n", section->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:
+ if (feat >= HEADER_LAST_FEATURE) {
pr_debug("unknown feature %d, continuing...\n", feat);
+ return 0;
+ }
+
+ if (!feat_ops[feat].process)
+ return 0;
+
+ return feat_ops[feat].process(section, ph, feat, fd);
+}
+
+static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
+ struct perf_header *ph, int fd,
+ bool repipe)
+{
+ int ret;
+
+ ret = readn(fd, header, sizeof(*header));
+ if (ret <= 0)
+ return -1;
+
+ if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
+ pr_debug("endian/magic failed\n");
+ return -1;
+ }
+
+ if (ph->needs_swap)
+ header->size = bswap_64(header->size);
+
+ if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0)
+ return -1;
+
+ return 0;
+}
+
+static int perf_header__read_pipe(struct perf_session *session, int fd)
+{
+ struct perf_header *header = &session->header;
+ struct perf_pipe_file_header f_header;
+
+ if (perf_file_header__read_pipe(&f_header, header, fd,
+ session->repipe) < 0) {
+ pr_debug("incompatible file format\n");
+ return -EINVAL;
}
+ session->fd = fd;
+
return 0;
}
-int perf_header__read(struct perf_header *self, int fd)
+static int read_attr(int fd, struct perf_header *ph,
+ struct perf_file_attr *f_attr)
{
- struct perf_file_header f_header;
+ struct perf_event_attr *attr = &f_attr->attr;
+ size_t sz, left;
+ size_t our_sz = sizeof(f_attr->attr);
+ int ret;
+
+ memset(f_attr, 0, sizeof(*f_attr));
+
+ /* read minimal guaranteed structure */
+ ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
+ if (ret <= 0) {
+ pr_debug("cannot read %d bytes of header attr\n",
+ PERF_ATTR_SIZE_VER0);
+ return -1;
+ }
+
+ /* on file perf_event_attr size */
+ sz = attr->size;
+
+ if (ph->needs_swap)
+ sz = bswap_32(sz);
+
+ if (sz == 0) {
+ /* assume ABI0 */
+ sz = PERF_ATTR_SIZE_VER0;
+ } else if (sz > our_sz) {
+ pr_debug("file uses a more recent and unsupported ABI"
+ " (%zu bytes extra)\n", sz - our_sz);
+ return -1;
+ }
+ /* what we have not yet read and that we know about */
+ left = sz - PERF_ATTR_SIZE_VER0;
+ if (left) {
+ void *ptr = attr;
+ ptr += PERF_ATTR_SIZE_VER0;
+
+ ret = readn(fd, ptr, left);
+ }
+ /* read perf_file_section, ids are read in caller */
+ ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
+
+ return ret <= 0 ? -1 : 0;
+}
+
+int perf_session__read_header(struct perf_session *session, int fd)
+{
+ struct perf_header *header = &session->header;
+ struct perf_file_header f_header;
struct perf_file_attr f_attr;
u64 f_id;
int nr_attrs, nr_ids, i, j;
- if (perf_file_header__read(&f_header, self, fd) < 0) {
- pr_debug("incompatible file format\n");
+ session->evlist = perf_evlist__new(NULL, NULL);
+ if (session->evlist == NULL)
+ return -ENOMEM;
+
+ if (session->fd_pipe)
+ return perf_header__read_pipe(session, fd);
+
+ if (perf_file_header__read(&f_header, header, fd) < 0)
return -EINVAL;
- }
- nr_attrs = f_header.attrs.size / sizeof(f_attr);
+ nr_attrs = f_header.attrs.size / f_header.attr_size;
lseek(fd, f_header.attrs.offset, SEEK_SET);
for (i = 0; i < nr_attrs; i++) {
- struct perf_header_attr *attr;
+ struct perf_evsel *evsel;
off_t tmp;
- if (do_read(fd, &f_attr, sizeof(f_attr)))
+ if (read_attr(fd, header, &f_attr) < 0)
goto out_errno;
+
+ if (header->needs_swap)
+ perf_event__attr_swap(&f_attr.attr);
+
tmp = lseek(fd, 0, SEEK_CUR);
+ evsel = perf_evsel__new(&f_attr.attr, i);
- attr = perf_header_attr__new(&f_attr.attr);
- if (attr == NULL)
- return -ENOMEM;
+ if (evsel == NULL)
+ goto out_delete_evlist;
+ /*
+ * Do it before so that if perf_evsel__alloc_id fails, this
+ * entry gets purged too at perf_evlist__delete().
+ */
+ perf_evlist__add(session->evlist, evsel);
nr_ids = f_attr.ids.size / sizeof(u64);
+ /*
+ * We don't have the cpu and thread maps on the header, so
+ * for allocating the perf_sample_id table we fake 1 cpu and
+ * hattr->ids threads.
+ */
+ if (perf_evsel__alloc_id(evsel, 1, nr_ids))
+ goto out_delete_evlist;
+
lseek(fd, f_attr.ids.offset, SEEK_SET);
for (j = 0; j < nr_ids; j++) {
- if (do_read(fd, &f_id, sizeof(f_id)))
+ if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
goto out_errno;
- 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_evlist__id_add(session->evlist, evsel, 0, j, f_id);
}
lseek(fd, tmp, SEEK_SET);
}
+ symbol_conf.nr_events = nr_attrs;
+
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;
- if (do_read(fd, events, f_header.event_types.size))
+ if (perf_header__getbuffer64(header, fd, events,
+ f_header.event_types.size))
goto out_errno;
event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type);
}
- perf_header__process_sections(self, fd, perf_file_section__process);
+ perf_header__process_sections(header, fd, NULL,
+ perf_file_section__process);
- lseek(fd, self->data_offset, SEEK_SET);
+ lseek(fd, header->data_offset, SEEK_SET);
- self->frozen = 1;
+ header->frozen = 1;
return 0;
out_errno:
return -errno;
+
+out_delete_evlist:
+ perf_evlist__delete(session->evlist);
+ session->evlist = NULL;
+ return -ENOMEM;
}
-u64 perf_header__sample_type(struct perf_header *header)
+int perf_event__synthesize_attr(struct perf_tool *tool,
+ struct perf_event_attr *attr, u16 ids, u64 *id,
+ perf_event__handler_t process)
{
- u64 type = 0;
- int i;
+ union perf_event *ev;
+ size_t size;
+ int err;
+
+ size = sizeof(struct perf_event_attr);
+ size = ALIGN(size, sizeof(u64));
+ size += sizeof(struct perf_event_header);
+ size += ids * sizeof(u64);
+
+ ev = malloc(size);
+
+ if (ev == NULL)
+ return -ENOMEM;
+
+ ev->attr.attr = *attr;
+ memcpy(ev->attr.id, id, ids * sizeof(u64));
+
+ ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
+ ev->attr.header.size = size;
+
+ err = process(tool, ev, NULL, NULL);
+
+ free(ev);
- for (i = 0; i < header->attrs; i++) {
- struct perf_header_attr *attr = header->attr[i];
+ return err;
+}
+
+int perf_event__synthesize_attrs(struct perf_tool *tool,
+ struct perf_session *session,
+ perf_event__handler_t process)
+{
+ struct perf_evsel *attr;
+ int err = 0;
- if (!type)
- type = attr->attr.sample_type;
- else if (type != attr->attr.sample_type)
- die("non matching sample_type");
+ list_for_each_entry(attr, &session->evlist->entries, node) {
+ err = perf_event__synthesize_attr(tool, &attr->attr, attr->ids,
+ attr->id, process);
+ if (err) {
+ pr_debug("failed to create perf header attribute\n");
+ return err;
+ }
}
- return type;
+ return err;
}
-struct perf_event_attr *
-perf_header__find_attr(u64 id, struct perf_header *header)
+int perf_event__process_attr(union perf_event *event,
+ struct perf_evlist **pevlist)
{
- int i;
+ unsigned int i, ids, n_ids;
+ struct perf_evsel *evsel;
+ struct perf_evlist *evlist = *pevlist;
+
+ if (evlist == NULL) {
+ *pevlist = evlist = perf_evlist__new(NULL, NULL);
+ if (evlist == NULL)
+ return -ENOMEM;
+ }
+
+ evsel = perf_evsel__new(&event->attr.attr, evlist->nr_entries);
+ if (evsel == NULL)
+ return -ENOMEM;
+
+ perf_evlist__add(evlist, evsel);
+
+ ids = event->header.size;
+ ids -= (void *)&event->attr.id - (void *)event;
+ n_ids = ids / sizeof(u64);
+ /*
+ * We don't have the cpu and thread maps on the header, so
+ * for allocating the perf_sample_id table we fake 1 cpu and
+ * hattr->ids threads.
+ */
+ if (perf_evsel__alloc_id(evsel, 1, n_ids))
+ return -ENOMEM;
- for (i = 0; i < header->attrs; i++) {
- struct perf_header_attr *attr = header->attr[i];
- int j;
+ for (i = 0; i < n_ids; i++) {
+ perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]);
+ }
+
+ return 0;
+}
+
+int perf_event__synthesize_event_type(struct perf_tool *tool,
+ u64 event_id, char *name,
+ perf_event__handler_t process,
+ struct machine *machine)
+{
+ union perf_event ev;
+ size_t size = 0;
+ int err = 0;
+
+ memset(&ev, 0, sizeof(ev));
+
+ ev.event_type.event_type.event_id = event_id;
+ memset(ev.event_type.event_type.name, 0, MAX_EVENT_NAME);
+ strncpy(ev.event_type.event_type.name, name, MAX_EVENT_NAME - 1);
+
+ ev.event_type.header.type = PERF_RECORD_HEADER_EVENT_TYPE;
+ size = strlen(ev.event_type.event_type.name);
+ size = ALIGN(size, sizeof(u64));
+ ev.event_type.header.size = sizeof(ev.event_type) -
+ (sizeof(ev.event_type.event_type.name) - size);
+
+ err = process(tool, &ev, NULL, machine);
+
+ return err;
+}
+
+int perf_event__synthesize_event_types(struct perf_tool *tool,
+ perf_event__handler_t process,
+ struct machine *machine)
+{
+ struct perf_trace_event_type *type;
+ int i, err = 0;
- for (j = 0; j < attr->ids; j++) {
- if (attr->id[j] == id)
- return &attr->attr;
+ for (i = 0; i < event_count; i++) {
+ type = &events[i];
+
+ err = perf_event__synthesize_event_type(tool, type->event_id,
+ type->name, process,
+ machine);
+ if (err) {
+ pr_debug("failed to create perf header event type\n");
+ return err;
}
}
- return NULL;
+ return err;
+}
+
+int perf_event__process_event_type(struct perf_tool *tool __unused,
+ union perf_event *event)
+{
+ if (perf_header__push_event(event->event_type.event_type.event_id,
+ event->event_type.event_type.name) < 0)
+ return -ENOMEM;
+
+ return 0;
+}
+
+int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
+ struct perf_evlist *evlist,
+ perf_event__handler_t process)
+{
+ union perf_event ev;
+ struct tracing_data *tdata;
+ ssize_t size = 0, aligned_size = 0, padding;
+ int err __used = 0;
+
+ /*
+ * We are going to store the size of the data followed
+ * by the data contents. Since the fd descriptor is a pipe,
+ * we cannot seek back to store the size of the data once
+ * we know it. Instead we:
+ *
+ * - write the tracing data to the temp file
+ * - get/write the data size to pipe
+ * - write the tracing data from the temp file
+ * to the pipe
+ */
+ tdata = tracing_data_get(&evlist->entries, fd, true);
+ if (!tdata)
+ return -1;
+
+ memset(&ev, 0, sizeof(ev));
+
+ ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
+ size = tdata->size;
+ aligned_size = ALIGN(size, sizeof(u64));
+ padding = aligned_size - size;
+ ev.tracing_data.header.size = sizeof(ev.tracing_data);
+ ev.tracing_data.size = aligned_size;
+
+ process(tool, &ev, NULL, NULL);
+
+ /*
+ * The put function will copy all the tracing data
+ * stored in temp file to the pipe.
+ */
+ tracing_data_put(tdata);
+
+ write_padded(fd, NULL, 0, padding);
+
+ return aligned_size;
+}
+
+int perf_event__process_tracing_data(union perf_event *event,
+ struct perf_session *session)
+{
+ ssize_t size_read, padding, size = event->tracing_data.size;
+ off_t offset = lseek(session->fd, 0, SEEK_CUR);
+ char buf[BUFSIZ];
+
+ /* setup for reading amidst mmap */
+ lseek(session->fd, offset + sizeof(struct tracing_data_event),
+ SEEK_SET);
+
+ size_read = trace_report(session->fd, session->repipe);
+
+ padding = ALIGN(size_read, sizeof(u64)) - size_read;
+
+ if (read(session->fd, buf, padding) < 0)
+ die("reading input file");
+ if (session->repipe) {
+ int retw = write(STDOUT_FILENO, buf, padding);
+ if (retw <= 0 || retw != padding)
+ die("repiping tracing data padding");
+ }
+
+ if (size_read + padding != size)
+ die("tracing data size mismatch");
+
+ return size_read + padding;
+}
+
+int perf_event__synthesize_build_id(struct perf_tool *tool,
+ struct dso *pos, u16 misc,
+ perf_event__handler_t process,
+ struct machine *machine)
+{
+ union perf_event ev;
+ size_t len;
+ int err = 0;
+
+ if (!pos->hit)
+ return err;
+
+ memset(&ev, 0, sizeof(ev));
+
+ len = pos->long_name_len + 1;
+ len = ALIGN(len, NAME_ALIGN);
+ memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
+ ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
+ ev.build_id.header.misc = misc;
+ ev.build_id.pid = machine->pid;
+ ev.build_id.header.size = sizeof(ev.build_id) + len;
+ memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
+
+ err = process(tool, &ev, NULL, machine);
+
+ return err;
+}
+
+int perf_event__process_build_id(struct perf_tool *tool __used,
+ union perf_event *event,
+ struct perf_session *session)
+{
+ __event_process_build_id(&event->build_id,
+ event->build_id.filename,
+ session);
+ return 0;
+}
+
+void disable_buildid_cache(void)
+{
+ no_buildid_cache = true;
}
projects / linux-flexiantxendom0-3.2.10.git / blobdiff