1 files changed, 802 insertions, 0 deletions

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
new file mode 100644
index 00000000..3c1b8a63
--- /dev/null
+++ b/tools/perf/util/event.c
@@ -0,0 +1,802 @@
+#include <linux/types.h>
+#include "event.h"
+#include "debug.h"
+#include "session.h"
+#include "sort.h"
+#include "string.h"
+#include "strlist.h"
+#include "thread.h"
+#include "thread_map.h"
+
+static const char *perf_event__names[] = {
+	[0]					= "TOTAL",
+	[PERF_RECORD_MMAP]			= "MMAP",
+	[PERF_RECORD_LOST]			= "LOST",
+	[PERF_RECORD_COMM]			= "COMM",
+	[PERF_RECORD_EXIT]			= "EXIT",
+	[PERF_RECORD_THROTTLE]			= "THROTTLE",
+	[PERF_RECORD_UNTHROTTLE]		= "UNTHROTTLE",
+	[PERF_RECORD_FORK]			= "FORK",
+	[PERF_RECORD_READ]			= "READ",
+	[PERF_RECORD_SAMPLE]			= "SAMPLE",
+	[PERF_RECORD_HEADER_ATTR]		= "ATTR",
+	[PERF_RECORD_HEADER_EVENT_TYPE]		= "EVENT_TYPE",
+	[PERF_RECORD_HEADER_TRACING_DATA]	= "TRACING_DATA",
+	[PERF_RECORD_HEADER_BUILD_ID]		= "BUILD_ID",
+	[PERF_RECORD_FINISHED_ROUND]		= "FINISHED_ROUND",
+};
+
+const char *perf_event__name(unsigned int id)
+{
+	if (id >= ARRAY_SIZE(perf_event__names))
+		return "INVALID";
+	if (!perf_event__names[id])
+		return "UNKNOWN";
+	return perf_event__names[id];
+}
+
+static struct perf_sample synth_sample = {
+	.pid	   = -1,
+	.tid	   = -1,
+	.time	   = -1,
+	.stream_id = -1,
+	.cpu	   = -1,
+	.period	   = 1,
+};
+
+static pid_t perf_event__synthesize_comm(union perf_event *event, pid_t pid,
+					 int full, perf_event__handler_t process,
+					 struct perf_session *session)
+{
+	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(&event->comm, 0, sizeof(event->comm));
+
+	while (!event->comm.comm[0] || !event->comm.pid) {
+		if (fgets(bf, sizeof(bf), fp) == NULL) {
+			pr_warning("couldn't get COMM and pgid, malformed %s\n", filename);
+			goto out;
+		}
+
+		if (memcmp(bf, "Name:", 5) == 0) {
+			char *name = bf + 5;
+			while (*name && isspace(*name))
+				++name;
+			size = strlen(name) - 1;
+			memcpy(event->comm.comm, name, size++);
+		} else if (memcmp(bf, "Tgid:", 5) == 0) {
+			char *tgids = bf + 5;
+			while (*tgids && isspace(*tgids))
+				++tgids;
+			tgid = event->comm.pid = atoi(tgids);
+		}
+	}
+
+	event->comm.header.type = PERF_RECORD_COMM;
+	size = ALIGN(size, sizeof(u64));
+	memset(event->comm.comm + size, 0, session->id_hdr_size);
+	event->comm.header.size = (sizeof(event->comm) -
+				(sizeof(event->comm.comm) - size) +
+				session->id_hdr_size);
+	if (!full) {
+		event->comm.tid = pid;
+
+		process(event, &synth_sample, session);
+		goto out;
+	}
+
+	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;
+
+		event->comm.tid = pid;
+
+		process(event, &synth_sample, session);
+	}
+
+	closedir(tasks);
+out:
+	fclose(fp);
+
+	return tgid;
+}
+
+static int perf_event__synthesize_mmap_events(union perf_event *event,
+					      pid_t pid, pid_t tgid,
+					      perf_event__handler_t process,
+					      struct perf_session *session)
+{
+	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;
+	}
+
+	event->header.type = PERF_RECORD_MMAP;
+	/*
+	 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
+	 */
+	event->header.misc = PERF_RECORD_MISC_USER;
+
+	while (1) {
+		char bf[BUFSIZ], *pbf = bf;
+		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, &event->mmap.start);
+		if (n < 0)
+			continue;
+		pbf += n + 1;
+		n = hex2u64(pbf, &event->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;
+
+			pbf += 3;
+			n = hex2u64(pbf, &event->mmap.pgoff);
+
+			size = strlen(execname);
+			execname[size - 1] = '\0'; /* Remove \n */
+			memcpy(event->mmap.filename, execname, size);
+			size = ALIGN(size, sizeof(u64));
+			event->mmap.len -= event->mmap.start;
+			event->mmap.header.size = (sizeof(event->mmap) -
+					        (sizeof(event->mmap.filename) - size));
+			memset(event->mmap.filename + size, 0, session->id_hdr_size);
+			event->mmap.header.size += session->id_hdr_size;
+			event->mmap.pid = tgid;
+			event->mmap.tid = pid;
+
+			process(event, &synth_sample, session);
+		}
+	}
+
+	fclose(fp);
+	return 0;
+}
+
+int perf_event__synthesize_modules(perf_event__handler_t process,
+				   struct perf_session *session,
+				   struct machine *machine)
+{
+	struct rb_node *nd;
+	struct map_groups *kmaps = &machine->kmaps;
+	union perf_event *event = zalloc((sizeof(event->mmap) +
+					  session->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 (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
+	     nd; nd = rb_next(nd)) {
+		size_t size;
+		struct map *pos = rb_entry(nd, struct map, rb_node);
+
+		if (pos->dso->kernel)
+			continue;
+
+		size = 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, session->id_hdr_size);
+		event->mmap.header.size += session->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);
+		process(event, &synth_sample, session);
+	}
+
+	free(event);
+	return 0;
+}
+
+static int __event__synthesize_thread(union perf_event *comm_event,
+				      union perf_event *mmap_event,
+				      pid_t pid, perf_event__handler_t process,
+				      struct perf_session *session)
+{
+	pid_t tgid = perf_event__synthesize_comm(comm_event, pid, 1, process,
+					    session);
+	if (tgid == -1)
+		return -1;
+	return perf_event__synthesize_mmap_events(mmap_event, pid, tgid,
+					     process, session);
+}
+
+int perf_event__synthesize_thread_map(struct thread_map *threads,
+				      perf_event__handler_t process,
+				      struct perf_session *session)
+{
+	union perf_event *comm_event, *mmap_event;
+	int err = -1, thread;
+
+	comm_event = malloc(sizeof(comm_event->comm) + session->id_hdr_size);
+	if (comm_event == NULL)
+		goto out;
+
+	mmap_event = malloc(sizeof(mmap_event->mmap) + session->id_hdr_size);
+	if (mmap_event == NULL)
+		goto out_free_comm;
+
+	err = 0;
+	for (thread = 0; thread < threads->nr; ++thread) {
+		if (__event__synthesize_thread(comm_event, mmap_event,
+					       threads->map[thread],
+					       process, session)) {
+			err = -1;
+			break;
+		}
+	}
+	free(mmap_event);
+out_free_comm:
+	free(comm_event);
+out:
+	return err;
+}
+
+int perf_event__synthesize_threads(perf_event__handler_t process,
+				   struct perf_session *session)
+{
+	DIR *proc;
+	struct dirent dirent, *next;
+	union perf_event *comm_event, *mmap_event;
+	int err = -1;
+
+	comm_event = malloc(sizeof(comm_event->comm) + session->id_hdr_size);
+	if (comm_event == NULL)
+		goto out;
+
+	mmap_event = malloc(sizeof(mmap_event->mmap) + session->id_hdr_size);
+	if (mmap_event == NULL)
+		goto out_free_comm;
+
+	proc = opendir("/proc");
+	if (proc == NULL)
+		goto out_free_mmap;
+
+	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(comm_event, mmap_event, pid,
+					   process, session);
+	}
+
+	closedir(proc);
+	err = 0;
+out_free_mmap:
+	free(mmap_event);
+out_free_comm:
+	free(comm_event);
+out:
+	return err;
+}
+
+struct process_symbol_args {
+	const char *name;
+	u64	   start;
+};
+
+static int find_symbol_cb(void *arg, const char *name, char type,
+			  u64 start, u64 end __used)
+{
+	struct process_symbol_args *args = arg;
+
+	/*
+	 * Must be a function or at least an alias, as in PARISC64, where "_text" is
+	 * an 'A' to the same address as "_stext".
+	 */
+	if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
+	      type == 'A') || strcmp(name, args->name))
+		return 0;
+
+	args->start = start;
+	return 1;
+}
+
+int perf_event__synthesize_kernel_mmap(perf_event__handler_t process,
+				       struct perf_session *session,
+				       struct machine *machine,
+				       const char *symbol_name)
+{
+	size_t size;
+	const char *filename, *mmap_name;
+	char path[PATH_MAX];
+	char name_buff[PATH_MAX];
+	struct map *map;
+	int err;
+	/*
+	 * 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.
+	 */
+	struct process_symbol_args args = { .name = symbol_name, };
+	union perf_event *event = zalloc((sizeof(event->mmap) +
+					  session->id_hdr_size));
+	if (event == NULL) {
+		pr_debug("Not enough memory synthesizing mmap event "
+			 "for kernel modules\n");
+		return -1;
+	}
+
+	mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
+	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;
+		filename = "/proc/kallsyms";
+	} else {
+		event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
+		if (machine__is_default_guest(machine))
+			filename = (char *) symbol_conf.default_guest_kallsyms;
+		else {
+			sprintf(path, "%s/proc/kallsyms", machine->root_dir);
+			filename = path;
+		}
+	}
+
+	if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0)
+		return -ENOENT;
+
+	map = machine->vmlinux_maps[MAP__FUNCTION];
+	size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
+			"%s%s", mmap_name, symbol_name) + 1;
+	size = ALIGN(size, sizeof(u64));
+	event->mmap.header.type = PERF_RECORD_MMAP;
+	event->mmap.header.size = (sizeof(event->mmap) -
+			(sizeof(event->mmap.filename) - size) + session->id_hdr_size);
+	event->mmap.pgoff = args.start;
+	event->mmap.start = map->start;
+	event->mmap.len   = map->end - event->mmap.start;
+	event->mmap.pid   = machine->pid;
+
+	err = process(event, &synth_sample, session);
+	free(event);
+
+	return err;
+}
+
+int perf_event__process_comm(union perf_event *event,
+			     struct perf_sample *sample __used,
+			     struct perf_session *session)
+{
+	struct thread *thread = perf_session__findnew(session, event->comm.tid);
+
+	dump_printf(": %s:%d\n", event->comm.comm, event->comm.tid);
+
+	if (thread == NULL || thread__set_comm(thread, event->comm.comm)) {
+		dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+int perf_event__process_lost(union perf_event *event,
+			     struct perf_sample *sample __used,
+			     struct perf_session *session)
+{
+	dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
+		    event->lost.id, event->lost.lost);
+	session->hists.stats.total_lost += event->lost.lost;
+	return 0;
+}
+
+static void perf_event__set_kernel_mmap_len(union perf_event *event,
+					    struct map **maps)
+{
+	maps[MAP__FUNCTION]->start = event->mmap.start;
+	maps[MAP__FUNCTION]->end   = event->mmap.start + event->mmap.len;
+	/*
+	 * Be a bit paranoid here, some perf.data file came with
+	 * a zero sized synthesized MMAP event for the kernel.
+	 */
+	if (maps[MAP__FUNCTION]->end == 0)
+		maps[MAP__FUNCTION]->end = ~0ULL;
+}
+
+static int perf_event__process_kernel_mmap(union perf_event *event,
+					   struct perf_session *session)
+{
+	struct map *map;
+	char kmmap_prefix[PATH_MAX];
+	struct machine *machine;
+	enum dso_kernel_type kernel_type;
+	bool is_kernel_mmap;
+
+	machine = perf_session__findnew_machine(session, event->mmap.pid);
+	if (!machine) {
+		pr_err("Can't find id %d's machine\n", event->mmap.pid);
+		goto out_problem;
+	}
+
+	machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
+	if (machine__is_host(machine))
+		kernel_type = DSO_TYPE_KERNEL;
+	else
+		kernel_type = DSO_TYPE_GUEST_KERNEL;
+
+	is_kernel_mmap = memcmp(event->mmap.filename,
+				kmmap_prefix,
+				strlen(kmmap_prefix)) == 0;
+	if (event->mmap.filename[0] == '/' ||
+	    (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
+
+		char short_module_name[1024];
+		char *name, *dot;
+
+		if (event->mmap.filename[0] == '/') {
+			name = strrchr(event->mmap.filename, '/');
+			if (name == NULL)
+				goto out_problem;
+
+			++name; /* skip / */
+			dot = strrchr(name, '.');
+			if (dot == NULL)
+				goto out_problem;
+			snprintf(short_module_name, sizeof(short_module_name),
+					"[%.*s]", (int)(dot - name), name);
+			strxfrchar(short_module_name, '-', '_');
+		} else
+			strcpy(short_module_name, event->mmap.filename);
+
+		map = machine__new_module(machine, event->mmap.start,
+					  event->mmap.filename);
+		if (map == NULL)
+			goto out_problem;
+
+		name = strdup(short_module_name);
+		if (name == NULL)
+			goto out_problem;
+
+		map->dso->short_name = name;
+		map->dso->sname_alloc = 1;
+		map->end = map->start + event->mmap.len;
+	} else if (is_kernel_mmap) {
+		const char *symbol_name = (event->mmap.filename +
+				strlen(kmmap_prefix));
+		/*
+		 * Should be there already, from the build-id table in
+		 * the header.
+		 */
+		struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
+						     kmmap_prefix);
+		if (kernel == NULL)
+			goto out_problem;
+
+		kernel->kernel = kernel_type;
+		if (__machine__create_kernel_maps(machine, kernel) < 0)
+			goto out_problem;
+
+		perf_event__set_kernel_mmap_len(event, machine->vmlinux_maps);
+
+		/*
+		 * Avoid using a zero address (kptr_restrict) for the ref reloc
+		 * symbol. Effectively having zero here means that at record
+		 * time /proc/sys/kernel/kptr_restrict was non zero.
+		 */
+		if (event->mmap.pgoff != 0) {
+			perf_session__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
+								 symbol_name,
+								 event->mmap.pgoff);
+		}
+
+		if (machine__is_default_guest(machine)) {
+			/*
+			 * preload dso of guest kernel and modules
+			 */
+			dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
+				  NULL);
+		}
+	}
+	return 0;
+out_problem:
+	return -1;
+}
+
+int perf_event__process_mmap(union perf_event *event,
+			     struct perf_sample *sample __used,
+			     struct perf_session *session)
+{
+	struct machine *machine;
+	struct thread *thread;
+	struct map *map;
+	u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
+	int ret = 0;
+
+	dump_printf(" %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n",
+			event->mmap.pid, event->mmap.tid, event->mmap.start,
+			event->mmap.len, event->mmap.pgoff, event->mmap.filename);
+
+	if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
+	    cpumode == PERF_RECORD_MISC_KERNEL) {
+		ret = perf_event__process_kernel_mmap(event, session);
+		if (ret < 0)
+			goto out_problem;
+		return 0;
+	}
+
+	machine = perf_session__find_host_machine(session);
+	if (machine == NULL)
+		goto out_problem;
+	thread = perf_session__findnew(session, event->mmap.pid);
+	if (thread == NULL)
+		goto out_problem;
+	map = map__new(&machine->user_dsos, event->mmap.start,
+			event->mmap.len, event->mmap.pgoff,
+			event->mmap.pid, event->mmap.filename,
+			MAP__FUNCTION);
+	if (map == NULL)
+		goto out_problem;
+
+	thread__insert_map(thread, map);
+	return 0;
+
+out_problem:
+	dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
+	return 0;
+}
+
+int perf_event__process_task(union perf_event *event,
+			     struct perf_sample *sample __used,
+			     struct perf_session *session)
+{
+	struct thread *thread = perf_session__findnew(session, event->fork.tid);
+	struct thread *parent = perf_session__findnew(session, event->fork.ptid);
+
+	dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid,
+		    event->fork.ppid, event->fork.ptid);
+
+	if (event->header.type == PERF_RECORD_EXIT) {
+		perf_session__remove_thread(session, thread);
+		return 0;
+	}
+
+	if (thread == NULL || parent == NULL ||
+	    thread__fork(thread, parent) < 0) {
+		dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+int perf_event__process(union perf_event *event, struct perf_sample *sample,
+			struct perf_session *session)
+{
+	switch (event->header.type) {
+	case PERF_RECORD_COMM:
+		perf_event__process_comm(event, sample, session);
+		break;
+	case PERF_RECORD_MMAP:
+		perf_event__process_mmap(event, sample, session);
+		break;
+	case PERF_RECORD_FORK:
+	case PERF_RECORD_EXIT:
+		perf_event__process_task(event, sample, session);
+		break;
+	case PERF_RECORD_LOST:
+		perf_event__process_lost(event, sample, session);
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+void thread__find_addr_map(struct thread *self,
+			   struct perf_session *session, u8 cpumode,
+			   enum map_type type, pid_t pid, u64 addr,
+			   struct addr_location *al)
+{
+	struct map_groups *mg = &self->mg;
+	struct machine *machine = NULL;
+
+	al->thread = self;
+	al->addr = addr;
+	al->cpumode = cpumode;
+	al->filtered = false;
+
+	if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
+		al->level = 'k';
+		machine = perf_session__find_host_machine(session);
+		if (machine == NULL) {
+			al->map = NULL;
+			return;
+		}
+		mg = &machine->kmaps;
+	} else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
+		al->level = '.';
+		machine = perf_session__find_host_machine(session);
+	} else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
+		al->level = 'g';
+		machine = perf_session__find_machine(session, pid);
+		if (machine == NULL) {
+			al->map = NULL;
+			return;
+		}
+		mg = &machine->kmaps;
+	} else {
+		/*
+		 * 'u' means guest os user space.
+		 * TODO: We don't support guest user space. Might support late.
+		 */
+		if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
+			al->level = 'u';
+		else
+			al->level = 'H';
+		al->map = NULL;
+
+		if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
+			cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
+			!perf_guest)
+			al->filtered = true;
+		if ((cpumode == PERF_RECORD_MISC_USER ||
+			cpumode == PERF_RECORD_MISC_KERNEL) &&
+			!perf_host)
+			al->filtered = true;
+
+		return;
+	}
+try_again:
+	al->map = map_groups__find(mg, type, al->addr);
+	if (al->map == NULL) {
+		/*
+		 * If this is outside of all known maps, and is a negative
+		 * address, try to look it up in the kernel dso, as it might be
+		 * a vsyscall or vdso (which executes in user-mode).
+		 *
+		 * XXX This is nasty, we should have a symbol list in the
+		 * "[vdso]" dso, but for now lets use the old trick of looking
+		 * in the whole kernel symbol list.
+		 */
+		if ((long long)al->addr < 0 &&
+		    cpumode == PERF_RECORD_MISC_USER &&
+		    machine && mg != &machine->kmaps) {
+			mg = &machine->kmaps;
+			goto try_again;
+		}
+	} else
+		al->addr = al->map->map_ip(al->map, al->addr);
+}
+
+void thread__find_addr_location(struct thread *self,
+				struct perf_session *session, u8 cpumode,
+				enum map_type type, pid_t pid, u64 addr,
+				struct addr_location *al,
+				symbol_filter_t filter)
+{
+	thread__find_addr_map(self, session, cpumode, type, pid, addr, al);
+	if (al->map != NULL)
+		al->sym = map__find_symbol(al->map, al->addr, filter);
+	else
+		al->sym = NULL;
+}
+
+int perf_event__preprocess_sample(const union perf_event *event,
+				  struct perf_session *session,
+				  struct addr_location *al,
+				  struct perf_sample *sample,
+				  symbol_filter_t filter)
+{
+	u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
+	struct thread *thread = perf_session__findnew(session, event->ip.pid);
+
+	if (thread == NULL)
+		return -1;
+
+	if (symbol_conf.comm_list &&
+	    !strlist__has_entry(symbol_conf.comm_list, thread->comm))
+		goto out_filtered;
+
+	dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
+	/*
+	 * Have we already created the kernel maps for the host machine?
+	 *
+	 * This should have happened earlier, when we processed the kernel MMAP
+	 * events, but for older perf.data files there was no such thing, so do
+	 * it now.
+	 */
+	if (cpumode == PERF_RECORD_MISC_KERNEL &&
+	    session->host_machine.vmlinux_maps[MAP__FUNCTION] == NULL)
+		machine__create_kernel_maps(&session->host_machine);
+
+	thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
+			      event->ip.pid, event->ip.ip, al);
+	dump_printf(" ...... dso: %s\n",
+		    al->map ? al->map->dso->long_name :
+			al->level == 'H' ? "[hypervisor]" : "<not found>");
+	al->sym = NULL;
+	al->cpu = sample->cpu;
+
+	if (al->map) {
+		if (symbol_conf.dso_list &&
+		    (!al->map || !al->map->dso ||
+		     !(strlist__has_entry(symbol_conf.dso_list,
+					  al->map->dso->short_name) ||
+		       (al->map->dso->short_name != al->map->dso->long_name &&
+			strlist__has_entry(symbol_conf.dso_list,
+					   al->map->dso->long_name)))))
+			goto out_filtered;
+
+		al->sym = map__find_symbol(al->map, al->addr, filter);
+	}
+
+	if (symbol_conf.sym_list && al->sym &&
+	    !strlist__has_entry(symbol_conf.sym_list, al->sym->name))
+		goto out_filtered;
+
+	return 0;
+
+out_filtered:
+	al->filtered = true;
+	return 0;
+}