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-rw-r--r--tools/perf/builtin-record.c235
1 files changed, 58 insertions, 177 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index ac5ddfff445..82260c56db3 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -17,6 +17,7 @@
#include "util/header.h"
#include "util/event.h"
#include "util/debug.h"
+#include "util/symbol.h"
#include <unistd.h>
#include <sched.h>
@@ -109,6 +110,24 @@ static void write_output(void *buf, size_t size)
}
}
+static void write_event(event_t *buf, size_t size)
+{
+ /*
+ * Add it to the list of DSOs, so that when we finish this
+ * record session we can pick the available build-ids.
+ */
+ if (buf->header.type == PERF_RECORD_MMAP)
+ dsos__findnew(buf->mmap.filename);
+
+ write_output(buf, size);
+}
+
+static int process_synthesized_event(event_t *event)
+{
+ write_event(event, event->header.size);
+ return 0;
+}
+
static void mmap_read(struct mmap_data *md)
{
unsigned int head = mmap_read_head(md);
@@ -157,14 +176,14 @@ static void mmap_read(struct mmap_data *md)
size = md->mask + 1 - (old & md->mask);
old += size;
- write_output(buf, size);
+ write_event(buf, size);
}
buf = &data[old & md->mask];
size = head - old;
old += size;
- write_output(buf, size);
+ write_event(buf, size);
md->prev = old;
mmap_write_tail(md, old);
@@ -191,168 +210,6 @@ static void sig_atexit(void)
kill(getpid(), signr);
}
-static pid_t pid_synthesize_comm_event(pid_t pid, int full)
-{
- struct comm_event comm_ev;
- char filename[PATH_MAX];
- char bf[BUFSIZ];
- FILE *fp;
- size_t size = 0;
- DIR *tasks;
- struct dirent dirent, *next;
- pid_t tgid = 0;
-
- snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
-
- fp = fopen(filename, "r");
- if (fp == NULL) {
- /*
- * We raced with a task exiting - just return:
- */
- if (verbose)
- fprintf(stderr, "couldn't open %s\n", filename);
- return 0;
- }
-
- memset(&comm_ev, 0, sizeof(comm_ev));
- while (!comm_ev.comm[0] || !comm_ev.pid) {
- if (fgets(bf, sizeof(bf), fp) == NULL)
- goto out_failure;
-
- if (memcmp(bf, "Name:", 5) == 0) {
- char *name = bf + 5;
- while (*name && isspace(*name))
- ++name;
- size = strlen(name) - 1;
- memcpy(comm_ev.comm, name, size++);
- } else if (memcmp(bf, "Tgid:", 5) == 0) {
- char *tgids = bf + 5;
- while (*tgids && isspace(*tgids))
- ++tgids;
- tgid = comm_ev.pid = atoi(tgids);
- }
- }
-
- comm_ev.header.type = PERF_RECORD_COMM;
- size = ALIGN(size, sizeof(u64));
- comm_ev.header.size = sizeof(comm_ev) - (sizeof(comm_ev.comm) - size);
-
- if (!full) {
- comm_ev.tid = pid;
-
- write_output(&comm_ev, comm_ev.header.size);
- goto out_fclose;
- }
-
- snprintf(filename, sizeof(filename), "/proc/%d/task", pid);
-
- tasks = opendir(filename);
- while (!readdir_r(tasks, &dirent, &next) && next) {
- char *end;
- pid = strtol(dirent.d_name, &end, 10);
- if (*end)
- continue;
-
- comm_ev.tid = pid;
-
- write_output(&comm_ev, comm_ev.header.size);
- }
- closedir(tasks);
-
-out_fclose:
- fclose(fp);
- return tgid;
-
-out_failure:
- fprintf(stderr, "couldn't get COMM and pgid, malformed %s\n",
- filename);
- exit(EXIT_FAILURE);
-}
-
-static void pid_synthesize_mmap_samples(pid_t pid, pid_t tgid)
-{
- char filename[PATH_MAX];
- FILE *fp;
-
- snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);
-
- fp = fopen(filename, "r");
- if (fp == NULL) {
- /*
- * We raced with a task exiting - just return:
- */
- if (verbose)
- fprintf(stderr, "couldn't open %s\n", filename);
- return;
- }
- while (1) {
- char bf[BUFSIZ], *pbf = bf;
- struct mmap_event mmap_ev = {
- .header = { .type = PERF_RECORD_MMAP },
- };
- int n;
- size_t size;
- if (fgets(bf, sizeof(bf), fp) == NULL)
- break;
-
- /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
- n = hex2u64(pbf, &mmap_ev.start);
- if (n < 0)
- continue;
- pbf += n + 1;
- n = hex2u64(pbf, &mmap_ev.len);
- if (n < 0)
- continue;
- pbf += n + 3;
- if (*pbf == 'x') { /* vm_exec */
- char *execname = strchr(bf, '/');
-
- /* Catch VDSO */
- if (execname == NULL)
- execname = strstr(bf, "[vdso]");
-
- if (execname == NULL)
- continue;
-
- size = strlen(execname);
- execname[size - 1] = '\0'; /* Remove \n */
- memcpy(mmap_ev.filename, execname, size);
- size = ALIGN(size, sizeof(u64));
- mmap_ev.len -= mmap_ev.start;
- mmap_ev.header.size = (sizeof(mmap_ev) -
- (sizeof(mmap_ev.filename) - size));
- mmap_ev.pid = tgid;
- mmap_ev.tid = pid;
-
- write_output(&mmap_ev, mmap_ev.header.size);
- }
- }
-
- fclose(fp);
-}
-
-static void synthesize_all(void)
-{
- DIR *proc;
- struct dirent dirent, *next;
-
- proc = opendir("/proc");
-
- while (!readdir_r(proc, &dirent, &next) && next) {
- char *end;
- pid_t pid, tgid;
-
- pid = strtol(dirent.d_name, &end, 10);
- if (*end) /* only interested in proper numerical dirents */
- continue;
-
- tgid = pid_synthesize_comm_event(pid, 1);
- pid_synthesize_mmap_samples(pid, tgid);
- }
-
- closedir(proc);
-}
-
static int group_fd;
static struct perf_header_attr *get_header_attr(struct perf_event_attr *a, int nr)
@@ -363,7 +220,11 @@ static struct perf_header_attr *get_header_attr(struct perf_event_attr *a, int n
h_attr = header->attr[nr];
} else {
h_attr = perf_header_attr__new(a);
- perf_header__add_attr(header, h_attr);
+ if (h_attr != NULL)
+ if (perf_header__add_attr(header, h_attr) < 0) {
+ perf_header_attr__delete(h_attr);
+ h_attr = NULL;
+ }
}
return h_attr;
@@ -424,7 +285,7 @@ try_again:
if (fd[nr_cpu][counter] < 0) {
int err = errno;
- if (err == EPERM)
+ if (err == EPERM || err == EACCES)
die("Permission error - are you root?\n");
else if (err == ENODEV && profile_cpu != -1)
die("No such device - did you specify an out-of-range profile CPU?\n");
@@ -451,6 +312,8 @@ try_again:
}
h_attr = get_header_attr(attr, counter);
+ if (h_attr == NULL)
+ die("nomem\n");
if (!file_new) {
if (memcmp(&h_attr->attr, attr, sizeof(*attr))) {
@@ -464,7 +327,10 @@ try_again:
exit(-1);
}
- perf_header_attr__add_id(h_attr, read_data.id);
+ if (perf_header_attr__add_id(h_attr, read_data.id) < 0) {
+ pr_warning("Not enough memory to add id\n");
+ exit(-1);
+ }
assert(fd[nr_cpu][counter] >= 0);
fcntl(fd[nr_cpu][counter], F_SETFL, O_NONBLOCK);
@@ -525,7 +391,7 @@ static void atexit_header(void)
{
header->data_size += bytes_written;
- perf_header__write(header, output);
+ perf_header__write(header, output, true);
}
static int __cmd_record(int argc, const char **argv)
@@ -573,12 +439,17 @@ static int __cmd_record(int argc, const char **argv)
else
header = perf_header__new();
+ if (header == NULL) {
+ pr_err("Not enough memory for reading perf file header\n");
+ return -1;
+ }
+
if (raw_samples) {
- perf_header__feat_trace_info(header);
+ perf_header__set_feat(header, HEADER_TRACE_INFO);
} else {
for (i = 0; i < nr_counters; i++) {
if (attrs[i].sample_type & PERF_SAMPLE_RAW) {
- perf_header__feat_trace_info(header);
+ perf_header__set_feat(header, HEADER_TRACE_INFO);
break;
}
}
@@ -602,24 +473,32 @@ static int __cmd_record(int argc, const char **argv)
}
if (file_new)
- perf_header__write(header, output);
+ perf_header__write(header, output, false);
- if (!system_wide) {
- pid_t tgid = pid_synthesize_comm_event(pid, 0);
- pid_synthesize_mmap_samples(pid, tgid);
- } else
- synthesize_all();
+ if (!system_wide)
+ event__synthesize_thread(pid, process_synthesized_event);
+ else
+ event__synthesize_threads(process_synthesized_event);
if (target_pid == -1 && argc) {
pid = fork();
if (pid < 0)
- perror("failed to fork");
+ die("failed to fork");
if (!pid) {
if (execvp(argv[0], (char **)argv)) {
perror(argv[0]);
exit(-1);
}
+ } else {
+ /*
+ * Wait a bit for the execv'ed child to appear
+ * and be updated in /proc
+ * FIXME: Do you know a less heuristical solution?
+ */
+ usleep(1000);
+ event__synthesize_thread(pid,
+ process_synthesized_event);
}
child_pid = pid;
@@ -729,6 +608,8 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
{
int counter;
+ symbol__init(0);
+
argc = parse_options(argc, argv, options, record_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc && target_pid == -1 && !system_wide)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-15 04:24:47 +0000