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-rw-r--r--tools/perf/Makefile1
-rw-r--r--tools/perf/builtin-record.c181
-rw-r--r--tools/perf/util/event.c177
-rw-r--r--tools/perf/util/event.h3
4 files changed, 191 insertions, 171 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 0a40c29b238..9f4488d6f8e 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -380,6 +380,7 @@ LIB_OBJS += util/alias.o
LIB_OBJS += util/config.o
LIB_OBJS += util/ctype.o
LIB_OBJS += util/environment.o
+LIB_OBJS += util/event.o
LIB_OBJS += util/exec_cmd.o
LIB_OBJS += util/help.o
LIB_OBJS += util/levenshtein.o
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 9e1638cc19c..4a73d89ce5d 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -109,6 +109,12 @@ static void write_output(void *buf, size_t size)
}
}
+static int process_synthesized_event(event_t *event)
+{
+ write_output(event, event->header.size);
+ return 0;
+}
+
static void mmap_read(struct mmap_data *md)
{
unsigned int head = mmap_read_head(md);
@@ -191,172 +197,6 @@ 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) {
-out_race:
- /*
- * 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);
- if (tasks == NULL)
- goto out_race;
-
- 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)
@@ -608,11 +448,10 @@ static int __cmd_record(int argc, const char **argv)
if (file_new)
perf_header__write(header, output);
- 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();
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
new file mode 100644
index 00000000000..1dae7e3b400
--- /dev/null
+++ b/tools/perf/util/event.c
@@ -0,0 +1,177 @@
+#include <linux/types.h>
+#include "event.h"
+#include "debug.h"
+#include "string.h"
+
+static pid_t event__synthesize_comm(pid_t pid, int full,
+ int (*process)(event_t *event))
+{
+ event_t 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) {
+out_race:
+ /*
+ * We raced with a task exiting - just return:
+ */
+ pr_debug("couldn't open %s\n", filename);
+ return 0;
+ }
+
+ memset(&ev.comm, 0, sizeof(ev.comm));
+ while (!ev.comm.comm[0] || !ev.comm.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(ev.comm.comm, name, size++);
+ } else if (memcmp(bf, "Tgid:", 5) == 0) {
+ char *tgids = bf + 5;
+ while (*tgids && isspace(*tgids))
+ ++tgids;
+ tgid = ev.comm.pid = atoi(tgids);
+ }
+ }
+
+ ev.comm.header.type = PERF_RECORD_COMM;
+ size = ALIGN(size, sizeof(u64));
+ ev.comm.header.size = sizeof(ev.comm) - (sizeof(ev.comm.comm) - size);
+
+ if (!full) {
+ ev.comm.tid = pid;
+
+ process(&ev);
+ goto out_fclose;
+ }
+
+ snprintf(filename, sizeof(filename), "/proc/%d/task", pid);
+
+ tasks = opendir(filename);
+ if (tasks == NULL)
+ goto out_race;
+
+ while (!readdir_r(tasks, &dirent, &next) && next) {
+ char *end;
+ pid = strtol(dirent.d_name, &end, 10);
+ if (*end)
+ continue;
+
+ ev.comm.tid = pid;
+
+ process(&ev);
+ }
+ closedir(tasks);
+
+out_fclose:
+ fclose(fp);
+ return tgid;
+
+out_failure:
+ pr_warning("couldn't get COMM and pgid, malformed %s\n", filename);
+ return -1;
+}
+
+static int event__synthesize_mmap_events(pid_t pid, pid_t tgid,
+ int (*process)(event_t *event))
+{
+ 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:
+ */
+ pr_debug("couldn't open %s\n", filename);
+ return -1;
+ }
+
+ while (1) {
+ char bf[BUFSIZ], *pbf = bf;
+ event_t 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, &ev.mmap.start);
+ if (n < 0)
+ continue;
+ pbf += n + 1;
+ n = hex2u64(pbf, &ev.mmap.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(ev.mmap.filename, execname, size);
+ size = ALIGN(size, sizeof(u64));
+ ev.mmap.len -= ev.mmap.start;
+ ev.mmap.header.size = (sizeof(ev.mmap) -
+ (sizeof(ev.mmap.filename) - size));
+ ev.mmap.pid = tgid;
+ ev.mmap.tid = pid;
+
+ process(&ev);
+ }
+ }
+
+ fclose(fp);
+ return 0;
+}
+
+int event__synthesize_thread(pid_t pid, int (*process)(event_t *event))
+{
+ pid_t tgid = event__synthesize_comm(pid, 1, process);
+ if (tgid == -1)
+ return -1;
+ return event__synthesize_mmap_events(pid, tgid, process);
+}
+
+void event__synthesize_threads(int (*process)(event_t *event))
+{
+ DIR *proc;
+ struct dirent dirent, *next;
+
+ proc = opendir("/proc");
+
+ while (!readdir_r(proc, &dirent, &next) && next) {
+ char *end;
+ pid_t pid = strtol(dirent.d_name, &end, 10);
+
+ if (*end) /* only interested in proper numerical dirents */
+ continue;
+
+ event__synthesize_thread(pid, process);
+ }
+
+ closedir(proc);
+}
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index d972b4b0d38..2ae1177be40 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -111,4 +111,7 @@ struct map *map__clone(struct map *self);
int map__overlap(struct map *l, struct map *r);
size_t map__fprintf(struct map *self, FILE *fp);
+int event__synthesize_thread(pid_t pid, int (*process)(event_t *event));
+void event__synthesize_threads(int (*process)(event_t *event));
+
#endif /* __PERF_RECORD_H */
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-03 07:57:39 +0000