perf tools: Move event synthesizing routines to separate .c file

For better grouping, in time we may end up making most of these static,
i.e. generalizing the 'perf record' synthesizing code so that based on
the target it can do the right thing and call the needed synthesizers.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-s9zxxhk40s95pjng9panet16@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 1 insertions, 1107 deletions

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 043a08fc7398..fc1e5a991008 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -1,4 +1,3 @@
-#include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
@@ -9,7 +8,6 @@
 #include <sys/stat.h>
 #include <unistd.h>
 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
-#include <api/fs/fs.h>
 #include <linux/perf_event.h>
 #include <linux/zalloc.h>
 #include "cpumap.h"
@@ -26,18 +24,16 @@
 #include "time-utils.h"
 #include <linux/ctype.h>
 #include "map.h"
+#include "util/namespaces.h"
 #include "symbol.h"
 #include "symbol/kallsyms.h"
 #include "asm/bug.h"
 #include "stat.h"
 #include "session.h"
 #include "bpf-event.h"
-#include "synthetic-events.h"
 #include "tool.h"
 #include "../perf.h"
 
-#define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500
-
 static const char *perf_event__names[] = {
 	[0]					= "TOTAL",
 	[PERF_RECORD_MMAP]			= "MMAP",
@@ -78,18 +74,6 @@ static const char *perf_event__names[] = {
 	[PERF_RECORD_COMPRESSED]		= "COMPRESSED",
 };
 
-static const char *perf_ns__names[] = {
-	[NET_NS_INDEX]		= "net",
-	[UTS_NS_INDEX]		= "uts",
-	[IPC_NS_INDEX]		= "ipc",
-	[PID_NS_INDEX]		= "pid",
-	[USER_NS_INDEX]		= "user",
-	[MNT_NS_INDEX]		= "mnt",
-	[CGROUP_NS_INDEX]	= "cgroup",
-};
-
-unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT;
-
 const char *perf_event__name(unsigned int id)
 {
 	if (id >= ARRAY_SIZE(perf_event__names))
@@ -99,775 +83,6 @@ const char *perf_event__name(unsigned int id)
 	return perf_event__names[id];
 }
 
-static const char *perf_ns__name(unsigned int id)
-{
-	if (id >= ARRAY_SIZE(perf_ns__names))
-		return "UNKNOWN";
-	return perf_ns__names[id];
-}
-
-int perf_tool__process_synth_event(struct perf_tool *tool,
-				   union perf_event *event,
-				   struct machine *machine,
-				   perf_event__handler_t process)
-{
-	struct perf_sample synth_sample = {
-	.pid	   = -1,
-	.tid	   = -1,
-	.time	   = -1,
-	.stream_id = -1,
-	.cpu	   = -1,
-	.period	   = 1,
-	.cpumode   = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
-	};
-
-	return process(tool, event, &synth_sample, machine);
-};
-
-/*
- * Assumes that the first 4095 bytes of /proc/pid/stat contains
- * the comm, tgid and ppid.
- */
-static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
-				    pid_t *tgid, pid_t *ppid)
-{
-	char filename[PATH_MAX];
-	char bf[4096];
-	int fd;
-	size_t size = 0;
-	ssize_t n;
-	char *name, *tgids, *ppids;
-
-	*tgid = -1;
-	*ppid = -1;
-
-	snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
-
-	fd = open(filename, O_RDONLY);
-	if (fd < 0) {
-		pr_debug("couldn't open %s\n", filename);
-		return -1;
-	}
-
-	n = read(fd, bf, sizeof(bf) - 1);
-	close(fd);
-	if (n <= 0) {
-		pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
-			   pid);
-		return -1;
-	}
-	bf[n] = '\0';
-
-	name = strstr(bf, "Name:");
-	tgids = strstr(bf, "Tgid:");
-	ppids = strstr(bf, "PPid:");
-
-	if (name) {
-		char *nl;
-
-		name = skip_spaces(name + 5);  /* strlen("Name:") */
-		nl = strchr(name, '\n');
-		if (nl)
-			*nl = '\0';
-
-		size = strlen(name);
-		if (size >= len)
-			size = len - 1;
-		memcpy(comm, name, size);
-		comm[size] = '\0';
-	} else {
-		pr_debug("Name: string not found for pid %d\n", pid);
-	}
-
-	if (tgids) {
-		tgids += 5;  /* strlen("Tgid:") */
-		*tgid = atoi(tgids);
-	} else {
-		pr_debug("Tgid: string not found for pid %d\n", pid);
-	}
-
-	if (ppids) {
-		ppids += 5;  /* strlen("PPid:") */
-		*ppid = atoi(ppids);
-	} else {
-		pr_debug("PPid: string not found for pid %d\n", pid);
-	}
-
-	return 0;
-}
-
-static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
-				    struct machine *machine,
-				    pid_t *tgid, pid_t *ppid)
-{
-	size_t size;
-
-	*ppid = -1;
-
-	memset(&event->comm, 0, sizeof(event->comm));
-
-	if (machine__is_host(machine)) {
-		if (perf_event__get_comm_ids(pid, event->comm.comm,
-					     sizeof(event->comm.comm),
-					     tgid, ppid) != 0) {
-			return -1;
-		}
-	} else {
-		*tgid = machine->pid;
-	}
-
-	if (*tgid < 0)
-		return -1;
-
-	event->comm.pid = *tgid;
-	event->comm.header.type = PERF_RECORD_COMM;
-
-	size = strlen(event->comm.comm) + 1;
-	size = PERF_ALIGN(size, sizeof(u64));
-	memset(event->comm.comm + size, 0, machine->id_hdr_size);
-	event->comm.header.size = (sizeof(event->comm) -
-				(sizeof(event->comm.comm) - size) +
-				machine->id_hdr_size);
-	event->comm.tid = pid;
-
-	return 0;
-}
-
-pid_t perf_event__synthesize_comm(struct perf_tool *tool,
-					 union perf_event *event, pid_t pid,
-					 perf_event__handler_t process,
-					 struct machine *machine)
-{
-	pid_t tgid, ppid;
-
-	if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
-		return -1;
-
-	if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
-		return -1;
-
-	return tgid;
-}
-
-static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
-					 struct perf_ns_link_info *ns_link_info)
-{
-	struct stat64 st;
-	char proc_ns[128];
-
-	sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
-	if (stat64(proc_ns, &st) == 0) {
-		ns_link_info->dev = st.st_dev;
-		ns_link_info->ino = st.st_ino;
-	}
-}
-
-int perf_event__synthesize_namespaces(struct perf_tool *tool,
-				      union perf_event *event,
-				      pid_t pid, pid_t tgid,
-				      perf_event__handler_t process,
-				      struct machine *machine)
-{
-	u32 idx;
-	struct perf_ns_link_info *ns_link_info;
-
-	if (!tool || !tool->namespace_events)
-		return 0;
-
-	memset(&event->namespaces, 0, (sizeof(event->namespaces) +
-	       (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
-	       machine->id_hdr_size));
-
-	event->namespaces.pid = tgid;
-	event->namespaces.tid = pid;
-
-	event->namespaces.nr_namespaces = NR_NAMESPACES;
-
-	ns_link_info = event->namespaces.link_info;
-
-	for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
-		perf_event__get_ns_link_info(pid, perf_ns__name(idx),
-					     &ns_link_info[idx]);
-
-	event->namespaces.header.type = PERF_RECORD_NAMESPACES;
-
-	event->namespaces.header.size = (sizeof(event->namespaces) +
-			(NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
-			machine->id_hdr_size);
-
-	if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
-		return -1;
-
-	return 0;
-}
-
-static int perf_event__synthesize_fork(struct perf_tool *tool,
-				       union perf_event *event,
-				       pid_t pid, pid_t tgid, pid_t ppid,
-				       perf_event__handler_t process,
-				       struct machine *machine)
-{
-	memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
-
-	/*
-	 * for main thread set parent to ppid from status file. For other
-	 * threads set parent pid to main thread. ie., assume main thread
-	 * spawns all threads in a process
-	*/
-	if (tgid == pid) {
-		event->fork.ppid = ppid;
-		event->fork.ptid = ppid;
-	} else {
-		event->fork.ppid = tgid;
-		event->fork.ptid = tgid;
-	}
-	event->fork.pid  = tgid;
-	event->fork.tid  = pid;
-	event->fork.header.type = PERF_RECORD_FORK;
-	event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC;
-
-	event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
-
-	if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
-		return -1;
-
-	return 0;
-}
-
-int perf_event__synthesize_mmap_events(struct perf_tool *tool,
-				       union perf_event *event,
-				       pid_t pid, pid_t tgid,
-				       perf_event__handler_t process,
-				       struct machine *machine,
-				       bool mmap_data)
-{
-	char filename[PATH_MAX];
-	FILE *fp;
-	unsigned long long t;
-	bool truncation = false;
-	unsigned long long timeout = proc_map_timeout * 1000000ULL;
-	int rc = 0;
-	const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
-	int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
-
-	if (machine__is_default_guest(machine))
-		return 0;
-
-	snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
-		 machine->root_dir, pid, 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;
-	}
-
-	event->header.type = PERF_RECORD_MMAP2;
-	t = rdclock();
-
-	while (1) {
-		char bf[BUFSIZ];
-		char prot[5];
-		char execname[PATH_MAX];
-		char anonstr[] = "//anon";
-		unsigned int ino;
-		size_t size;
-		ssize_t n;
-
-		if (fgets(bf, sizeof(bf), fp) == NULL)
-			break;
-
-		if ((rdclock() - t) > timeout) {
-			pr_warning("Reading %s time out. "
-				   "You may want to increase "
-				   "the time limit by --proc-map-timeout\n",
-				   filename);
-			truncation = true;
-			goto out;
-		}
-
-		/* ensure null termination since stack will be reused. */
-		strcpy(execname, "");
-
-		/* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
-		n = sscanf(bf, "%"PRI_lx64"-%"PRI_lx64" %s %"PRI_lx64" %x:%x %u %[^\n]\n",
-		       &event->mmap2.start, &event->mmap2.len, prot,
-		       &event->mmap2.pgoff, &event->mmap2.maj,
-		       &event->mmap2.min,
-		       &ino, execname);
-
-		/*
- 		 * Anon maps don't have the execname.
- 		 */
-		if (n < 7)
-			continue;
-
-		event->mmap2.ino = (u64)ino;
-
-		/*
-		 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
-		 */
-		if (machine__is_host(machine))
-			event->header.misc = PERF_RECORD_MISC_USER;
-		else
-			event->header.misc = PERF_RECORD_MISC_GUEST_USER;
-
-		/* map protection and flags bits */
-		event->mmap2.prot = 0;
-		event->mmap2.flags = 0;
-		if (prot[0] == 'r')
-			event->mmap2.prot |= PROT_READ;
-		if (prot[1] == 'w')
-			event->mmap2.prot |= PROT_WRITE;
-		if (prot[2] == 'x')
-			event->mmap2.prot |= PROT_EXEC;
-
-		if (prot[3] == 's')
-			event->mmap2.flags |= MAP_SHARED;
-		else
-			event->mmap2.flags |= MAP_PRIVATE;
-
-		if (prot[2] != 'x') {
-			if (!mmap_data || prot[0] != 'r')
-				continue;
-
-			event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
-		}
-
-out:
-		if (truncation)
-			event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
-
-		if (!strcmp(execname, ""))
-			strcpy(execname, anonstr);
-
-		if (hugetlbfs_mnt_len &&
-		    !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
-			strcpy(execname, anonstr);
-			event->mmap2.flags |= MAP_HUGETLB;
-		}
-
-		size = strlen(execname) + 1;
-		memcpy(event->mmap2.filename, execname, size);
-		size = PERF_ALIGN(size, sizeof(u64));
-		event->mmap2.len -= event->mmap.start;
-		event->mmap2.header.size = (sizeof(event->mmap2) -
-					(sizeof(event->mmap2.filename) - size));
-		memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
-		event->mmap2.header.size += machine->id_hdr_size;
-		event->mmap2.pid = tgid;
-		event->mmap2.tid = pid;
-
-		if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
-			rc = -1;
-			break;
-		}
-
-		if (truncation)
-			break;
-	}
-
-	fclose(fp);
-	return rc;
-}
-
-int perf_event__synthesize_modules(struct perf_tool *tool,
-				   perf_event__handler_t process,
-				   struct machine *machine)
-{
-	int rc = 0;
-	struct map *pos;
-	struct maps *maps = machine__kernel_maps(machine);
-	union perf_event *event = zalloc((sizeof(event->mmap) +
-					  machine->id_hdr_size));
-	if (event == NULL) {
-		pr_debug("Not enough memory synthesizing mmap event "
-			 "for kernel modules\n");
-		return -1;
-	}
-
-	event->header.type = PERF_RECORD_MMAP;
-
-	/*
-	 * kernel uses 0 for user space maps, see kernel/perf_event.c
-	 * __perf_event_mmap
-	 */
-	if (machine__is_host(machine))
-		event->header.misc = PERF_RECORD_MISC_KERNEL;
-	else
-		event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
-
-	for (pos = maps__first(maps); pos; pos = map__next(pos)) {
-		size_t size;
-
-		if (!__map__is_kmodule(pos))
-			continue;
-
-		size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
-		event->mmap.header.type = PERF_RECORD_MMAP;
-		event->mmap.header.size = (sizeof(event->mmap) -
-				        (sizeof(event->mmap.filename) - size));
-		memset(event->mmap.filename + size, 0, machine->id_hdr_size);
-		event->mmap.header.size += machine->id_hdr_size;
-		event->mmap.start = pos->start;
-		event->mmap.len   = pos->end - pos->start;
-		event->mmap.pid   = machine->pid;
-
-		memcpy(event->mmap.filename, pos->dso->long_name,
-		       pos->dso->long_name_len + 1);
-		if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
-			rc = -1;
-			break;
-		}
-	}
-
-	free(event);
-	return rc;
-}
-
-static int __event__synthesize_thread(union perf_event *comm_event,
-				      union perf_event *mmap_event,
-				      union perf_event *fork_event,
-				      union perf_event *namespaces_event,
-				      pid_t pid, int full,
-				      perf_event__handler_t process,
-				      struct perf_tool *tool,
-				      struct machine *machine,
-				      bool mmap_data)
-{
-	char filename[PATH_MAX];
-	DIR *tasks;
-	struct dirent *dirent;
-	pid_t tgid, ppid;
-	int rc = 0;
-
-	/* special case: only send one comm event using passed in pid */
-	if (!full) {
-		tgid = perf_event__synthesize_comm(tool, comm_event, pid,
-						   process, machine);
-
-		if (tgid == -1)
-			return -1;
-
-		if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
-						      tgid, process, machine) < 0)
-			return -1;
-
-		/*
-		 * send mmap only for thread group leader
-		 * see thread__init_map_groups
-		 */
-		if (pid == tgid &&
-		    perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
-						       process, machine, mmap_data))
-			return -1;
-
-		return 0;
-	}
-
-	if (machine__is_default_guest(machine))
-		return 0;
-
-	snprintf(filename, sizeof(filename), "%s/proc/%d/task",
-		 machine->root_dir, pid);
-
-	tasks = opendir(filename);
-	if (tasks == NULL) {
-		pr_debug("couldn't open %s\n", filename);
-		return 0;
-	}
-
-	while ((dirent = readdir(tasks)) != NULL) {
-		char *end;
-		pid_t _pid;
-
-		_pid = strtol(dirent->d_name, &end, 10);
-		if (*end)
-			continue;
-
-		rc = -1;
-		if (perf_event__prepare_comm(comm_event, _pid, machine,
-					     &tgid, &ppid) != 0)
-			break;
-
-		if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
-						ppid, process, machine) < 0)
-			break;
-
-		if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
-						      tgid, process, machine) < 0)
-			break;
-
-		/*
-		 * Send the prepared comm event
-		 */
-		if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
-			break;
-
-		rc = 0;
-		if (_pid == pid) {
-			/* process the parent's maps too */
-			rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
-						process, machine, mmap_data);
-			if (rc)
-				break;
-		}
-	}
-
-	closedir(tasks);
-	return rc;
-}
-
-int perf_event__synthesize_thread_map(struct perf_tool *tool,
-				      struct perf_thread_map *threads,
-				      perf_event__handler_t process,
-				      struct machine *machine,
-				      bool mmap_data)
-{
-	union perf_event *comm_event, *mmap_event, *fork_event;
-	union perf_event *namespaces_event;
-	int err = -1, thread, j;
-
-	comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
-	if (comm_event == NULL)
-		goto out;
-
-	mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
-	if (mmap_event == NULL)
-		goto out_free_comm;
-
-	fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
-	if (fork_event == NULL)
-		goto out_free_mmap;
-
-	namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
-				  (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
-				  machine->id_hdr_size);
-	if (namespaces_event == NULL)
-		goto out_free_fork;
-
-	err = 0;
-	for (thread = 0; thread < threads->nr; ++thread) {
-		if (__event__synthesize_thread(comm_event, mmap_event,
-					       fork_event, namespaces_event,
-					       perf_thread_map__pid(threads, thread), 0,
-					       process, tool, machine,
-					       mmap_data)) {
-			err = -1;
-			break;
-		}
-
-		/*
-		 * comm.pid is set to thread group id by
-		 * perf_event__synthesize_comm
-		 */
-		if ((int) comm_event->comm.pid != perf_thread_map__pid(threads, thread)) {
-			bool need_leader = true;
-
-			/* is thread group leader in thread_map? */
-			for (j = 0; j < threads->nr; ++j) {
-				if ((int) comm_event->comm.pid == perf_thread_map__pid(threads, j)) {
-					need_leader = false;
-					break;
-				}
-			}
-
-			/* if not, generate events for it */
-			if (need_leader &&
-			    __event__synthesize_thread(comm_event, mmap_event,
-						       fork_event, namespaces_event,
-						       comm_event->comm.pid, 0,
-						       process, tool, machine,
-						       mmap_data)) {
-				err = -1;
-				break;
-			}
-		}
-	}
-	free(namespaces_event);
-out_free_fork:
-	free(fork_event);
-out_free_mmap:
-	free(mmap_event);
-out_free_comm:
-	free(comm_event);
-out:
-	return err;
-}
-
-static int __perf_event__synthesize_threads(struct perf_tool *tool,
-					    perf_event__handler_t process,
-					    struct machine *machine,
-					    bool mmap_data,
-					    struct dirent **dirent,
-					    int start,
-					    int num)
-{
-	union perf_event *comm_event, *mmap_event, *fork_event;
-	union perf_event *namespaces_event;
-	int err = -1;
-	char *end;
-	pid_t pid;
-	int i;
-
-	comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
-	if (comm_event == NULL)
-		goto out;
-
-	mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
-	if (mmap_event == NULL)
-		goto out_free_comm;
-
-	fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
-	if (fork_event == NULL)
-		goto out_free_mmap;
-
-	namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
-				  (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
-				  machine->id_hdr_size);
-	if (namespaces_event == NULL)
-		goto out_free_fork;
-
-	for (i = start; i < start + num; i++) {
-		if (!isdigit(dirent[i]->d_name[0]))
-			continue;
-
-		pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
-		/* only interested in proper numerical dirents */
-		if (*end)
-			continue;
-		/*
-		 * We may race with exiting thread, so don't stop just because
-		 * one thread couldn't be synthesized.
-		 */
-		__event__synthesize_thread(comm_event, mmap_event, fork_event,
-					   namespaces_event, pid, 1, process,
-					   tool, machine, mmap_data);
-	}
-	err = 0;
-
-	free(namespaces_event);
-out_free_fork:
-	free(fork_event);
-out_free_mmap:
-	free(mmap_event);
-out_free_comm:
-	free(comm_event);
-out:
-	return err;
-}
-
-struct synthesize_threads_arg {
-	struct perf_tool *tool;
-	perf_event__handler_t process;
-	struct machine *machine;
-	bool mmap_data;
-	struct dirent **dirent;
-	int num;
-	int start;
-};
-
-static void *synthesize_threads_worker(void *arg)
-{
-	struct synthesize_threads_arg *args = arg;
-
-	__perf_event__synthesize_threads(args->tool, args->process,
-					 args->machine, args->mmap_data,
-					 args->dirent,
-					 args->start, args->num);
-	return NULL;
-}
-
-int perf_event__synthesize_threads(struct perf_tool *tool,
-				   perf_event__handler_t process,
-				   struct machine *machine,
-				   bool mmap_data,
-				   unsigned int nr_threads_synthesize)
-{
-	struct synthesize_threads_arg *args = NULL;
-	pthread_t *synthesize_threads = NULL;
-	char proc_path[PATH_MAX];
-	struct dirent **dirent;
-	int num_per_thread;
-	int m, n, i, j;
-	int thread_nr;
-	int base = 0;
-	int err = -1;
-
-
-	if (machine__is_default_guest(machine))
-		return 0;
-
-	snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
-	n = scandir(proc_path, &dirent, 0, alphasort);
-	if (n < 0)
-		return err;
-
-	if (nr_threads_synthesize == UINT_MAX)
-		thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
-	else
-		thread_nr = nr_threads_synthesize;
-
-	if (thread_nr <= 1) {
-		err = __perf_event__synthesize_threads(tool, process,
-						       machine, mmap_data,
-						       dirent, base, n);
-		goto free_dirent;
-	}
-	if (thread_nr > n)
-		thread_nr = n;
-
-	synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
-	if (synthesize_threads == NULL)
-		goto free_dirent;
-
-	args = calloc(sizeof(*args), thread_nr);
-	if (args == NULL)
-		goto free_threads;
-
-	num_per_thread = n / thread_nr;
-	m = n % thread_nr;
-	for (i = 0; i < thread_nr; i++) {
-		args[i].tool = tool;
-		args[i].process = process;
-		args[i].machine = machine;
-		args[i].mmap_data = mmap_data;
-		args[i].dirent = dirent;
-	}
-	for (i = 0; i < m; i++) {
-		args[i].num = num_per_thread + 1;
-		args[i].start = i * args[i].num;
-	}
-	if (i != 0)
-		base = args[i-1].start + args[i-1].num;
-	for (j = i; j < thread_nr; j++) {
-		args[j].num = num_per_thread;
-		args[j].start = base + (j - i) * args[i].num;
-	}
-
-	for (i = 0; i < thread_nr; i++) {
-		if (pthread_create(&synthesize_threads[i], NULL,
-				   synthesize_threads_worker, &args[i]))
-			goto out_join;
-	}
-	err = 0;
-out_join:
-	for (i = 0; i < thread_nr; i++)
-		pthread_join(synthesize_threads[i], NULL);
-	free(args);
-free_threads:
-	free(synthesize_threads);
-free_dirent:
-	for (i = 0; i < n; i++)
-		zfree(&dirent[i]);
-	free(dirent);
-
-	return err;
-}
-
 struct process_symbol_args {
 	const char *name;
 	u64	   start;
@@ -902,327 +117,6 @@ int kallsyms__get_function_start(const char *kallsyms_filename,
 	return 0;
 }
 
-int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
-					      perf_event__handler_t process __maybe_unused,
-					      struct machine *machine __maybe_unused)
-{
-	return 0;
-}
-
-static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
-						perf_event__handler_t process,
-						struct machine *machine)
-{
-	size_t size;
-	struct map *map = machine__kernel_map(machine);
-	struct kmap *kmap;
-	int err;
-	union perf_event *event;
-
-	if (map == NULL)
-		return -1;
-
-	kmap = map__kmap(map);
-	if (!kmap->ref_reloc_sym)
-		return -1;
-
-	/*
-	 * We should get this from /sys/kernel/sections/.text, but till that is
-	 * available use this, and after it is use this as a fallback for older
-	 * kernels.
-	 */
-	event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
-	if (event == NULL) {
-		pr_debug("Not enough memory synthesizing mmap event "
-			 "for kernel modules\n");
-		return -1;
-	}
-
-	if (machine__is_host(machine)) {
-		/*
-		 * kernel uses PERF_RECORD_MISC_USER for user space maps,
-		 * see kernel/perf_event.c __perf_event_mmap
-		 */
-		event->header.misc = PERF_RECORD_MISC_KERNEL;
-	} else {
-		event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
-	}
-
-	size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
-			"%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
-	size = PERF_ALIGN(size, sizeof(u64));
-	event->mmap.header.type = PERF_RECORD_MMAP;
-	event->mmap.header.size = (sizeof(event->mmap) -
-			(sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
-	event->mmap.pgoff = kmap->ref_reloc_sym->addr;
-	event->mmap.start = map->start;
-	event->mmap.len   = map->end - event->mmap.start;
-	event->mmap.pid   = machine->pid;
-
-	err = perf_tool__process_synth_event(tool, event, machine, process);
-	free(event);
-
-	return err;
-}
-
-int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
-				       perf_event__handler_t process,
-				       struct machine *machine)
-{
-	int err;
-
-	err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
-	if (err < 0)
-		return err;
-
-	return perf_event__synthesize_extra_kmaps(tool, process, machine);
-}
-
-int perf_event__synthesize_thread_map2(struct perf_tool *tool,
-				      struct perf_thread_map *threads,
-				      perf_event__handler_t process,
-				      struct machine *machine)
-{
-	union perf_event *event;
-	int i, err, size;
-
-	size  = sizeof(event->thread_map);
-	size +=	threads->nr * sizeof(event->thread_map.entries[0]);
-
-	event = zalloc(size);
-	if (!event)
-		return -ENOMEM;
-
-	event->header.type = PERF_RECORD_THREAD_MAP;
-	event->header.size = size;
-	event->thread_map.nr = threads->nr;
-
-	for (i = 0; i < threads->nr; i++) {
-		struct perf_record_thread_map_entry *entry = &event->thread_map.entries[i];
-		char *comm = perf_thread_map__comm(threads, i);
-
-		if (!comm)
-			comm = (char *) "";
-
-		entry->pid = perf_thread_map__pid(threads, i);
-		strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
-	}
-
-	err = process(tool, event, NULL, machine);
-
-	free(event);
-	return err;
-}
-
-static void synthesize_cpus(struct cpu_map_entries *cpus,
-			    struct perf_cpu_map *map)
-{
-	int i;
-
-	cpus->nr = map->nr;
-
-	for (i = 0; i < map->nr; i++)
-		cpus->cpu[i] = map->map[i];
-}
-
-static void synthesize_mask(struct perf_record_record_cpu_map *mask,
-			    struct perf_cpu_map *map, int max)
-{
-	int i;
-
-	mask->nr = BITS_TO_LONGS(max);
-	mask->long_size = sizeof(long);
-
-	for (i = 0; i < map->nr; i++)
-		set_bit(map->map[i], mask->mask);
-}
-
-static size_t cpus_size(struct perf_cpu_map *map)
-{
-	return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
-}
-
-static size_t mask_size(struct perf_cpu_map *map, int *max)
-{
-	int i;
-
-	*max = 0;
-
-	for (i = 0; i < map->nr; i++) {
-		/* bit possition of the cpu is + 1 */
-		int bit = map->map[i] + 1;
-
-		if (bit > *max)
-			*max = bit;
-	}
-
-	return sizeof(struct perf_record_record_cpu_map) + BITS_TO_LONGS(*max) * sizeof(long);
-}
-
-void *cpu_map_data__alloc(struct perf_cpu_map *map, size_t *size, u16 *type, int *max)
-{
-	size_t size_cpus, size_mask;
-	bool is_dummy = perf_cpu_map__empty(map);
-
-	/*
-	 * Both array and mask data have variable size based
-	 * on the number of cpus and their actual values.
-	 * The size of the 'struct perf_record_cpu_map_data' is:
-	 *
-	 *   array = size of 'struct cpu_map_entries' +
-	 *           number of cpus * sizeof(u64)
-	 *
-	 *   mask  = size of 'struct perf_record_record_cpu_map' +
-	 *           maximum cpu bit converted to size of longs
-	 *
-	 * and finaly + the size of 'struct perf_record_cpu_map_data'.
-	 */
-	size_cpus = cpus_size(map);
-	size_mask = mask_size(map, max);
-
-	if (is_dummy || (size_cpus < size_mask)) {
-		*size += size_cpus;
-		*type  = PERF_CPU_MAP__CPUS;
-	} else {
-		*size += size_mask;
-		*type  = PERF_CPU_MAP__MASK;
-	}
-
-	*size += sizeof(struct perf_record_cpu_map_data);
-	*size = PERF_ALIGN(*size, sizeof(u64));
-	return zalloc(*size);
-}
-
-void cpu_map_data__synthesize(struct perf_record_cpu_map_data *data, struct perf_cpu_map *map,
-			      u16 type, int max)
-{
-	data->type = type;
-
-	switch (type) {
-	case PERF_CPU_MAP__CPUS:
-		synthesize_cpus((struct cpu_map_entries *) data->data, map);
-		break;
-	case PERF_CPU_MAP__MASK:
-		synthesize_mask((struct perf_record_record_cpu_map *)data->data, map, max);
-	default:
-		break;
-	};
-}
-
-static struct perf_record_cpu_map *cpu_map_event__new(struct perf_cpu_map *map)
-{
-	size_t size = sizeof(struct perf_record_cpu_map);
-	struct perf_record_cpu_map *event;
-	int max;
-	u16 type;
-
-	event = cpu_map_data__alloc(map, &size, &type, &max);
-	if (!event)
-		return NULL;
-
-	event->header.type = PERF_RECORD_CPU_MAP;
-	event->header.size = size;
-	event->data.type   = type;
-
-	cpu_map_data__synthesize(&event->data, map, type, max);
-	return event;
-}
-
-int perf_event__synthesize_cpu_map(struct perf_tool *tool,
-				   struct perf_cpu_map *map,
-				   perf_event__handler_t process,
-				   struct machine *machine)
-{
-	struct perf_record_cpu_map *event;
-	int err;
-
-	event = cpu_map_event__new(map);
-	if (!event)
-		return -ENOMEM;
-
-	err = process(tool, (union perf_event *) event, NULL, machine);
-
-	free(event);
-	return err;
-}
-
-int perf_event__synthesize_stat_config(struct perf_tool *tool,
-				       struct perf_stat_config *config,
-				       perf_event__handler_t process,
-				       struct machine *machine)
-{
-	struct perf_record_stat_config *event;
-	int size, i = 0, err;
-
-	size  = sizeof(*event);
-	size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
-
-	event = zalloc(size);
-	if (!event)
-		return -ENOMEM;
-
-	event->header.type = PERF_RECORD_STAT_CONFIG;
-	event->header.size = size;
-	event->nr          = PERF_STAT_CONFIG_TERM__MAX;
-
-#define ADD(__term, __val)					\
-	event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term;	\
-	event->data[i].val = __val;				\
-	i++;
-
-	ADD(AGGR_MODE,	config->aggr_mode)
-	ADD(INTERVAL,	config->interval)
-	ADD(SCALE,	config->scale)
-
-	WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
-		  "stat config terms unbalanced\n");
-#undef ADD
-
-	err = process(tool, (union perf_event *) event, NULL, machine);
-
-	free(event);
-	return err;
-}
-
-int perf_event__synthesize_stat(struct perf_tool *tool,
-				u32 cpu, u32 thread, u64 id,
-				struct perf_counts_values *count,
-				perf_event__handler_t process,
-				struct machine *machine)
-{
-	struct perf_record_stat event;
-
-	event.header.type = PERF_RECORD_STAT;
-	event.header.size = sizeof(event);
-	event.header.misc = 0;
-
-	event.id        = id;
-	event.cpu       = cpu;
-	event.thread    = thread;
-	event.val       = count->val;
-	event.ena       = count->ena;
-	event.run       = count->run;
-
-	return process(tool, (union perf_event *) &event, NULL, machine);
-}
-
-int perf_event__synthesize_stat_round(struct perf_tool *tool,
-				      u64 evtime, u64 type,
-				      perf_event__handler_t process,
-				      struct machine *machine)
-{
-	struct perf_record_stat_round event;
-
-	event.header.type = PERF_RECORD_STAT_ROUND;
-	event.header.size = sizeof(event);
-	event.header.misc = 0;
-
-	event.time = evtime;
-	event.type = type;
-
-	return process(tool, (union perf_event *) &event, NULL, machine);
-}
-
 void perf_event__read_stat_config(struct perf_stat_config *config,
 				  struct perf_record_stat_config *event)
 {