perf tools: Resolve machine earlier and pass it to perf_event_ops

Reducing the exposure of perf_session further, so that we can use the
classes in cases where no perf.data file is created.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-stua66dcscsezzrcdugvbmvd@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

13 files changed, 195 insertions, 200 deletions

diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index 0e4de18..2f84c48 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -19,11 +19,11 @@ static int build_id__mark_dso_hit(struct perf_event_ops *ops __used,
 				  union perf_event *event,
 				  struct perf_sample *sample __used,
 				  struct perf_evsel *evsel __used,
-				  struct perf_session *session)
+				  struct machine *machine)
 {
 	struct addr_location al;
 	u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
-	struct thread *thread = perf_session__findnew(session, event->ip.pid);
+	struct thread *thread = machine__findnew_thread(machine, event->ip.pid);
 
 	if (thread == NULL) {
 		pr_err("problem processing %d event, skipping it.\n",
@@ -31,8 +31,8 @@ static int build_id__mark_dso_hit(struct perf_event_ops *ops __used,
 		return -1;
 	}
 
-	thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
-			      event->ip.pid, event->ip.ip, &al);
+	thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
+			      event->ip.ip, &al);
 
 	if (al.map != NULL)
 		al.map->dso->hit = 1;
@@ -43,16 +43,16 @@ static int build_id__mark_dso_hit(struct perf_event_ops *ops __used,
 static int perf_event__exit_del_thread(struct perf_event_ops *ops __used,
 				       union perf_event *event,
 				       struct perf_sample *sample __used,
-				       struct perf_session *session)
+				       struct machine *machine)
 {
-	struct thread *thread = perf_session__findnew(session, event->fork.tid);
+	struct thread *thread = machine__findnew_thread(machine, event->fork.tid);
 
 	dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid,
 		    event->fork.ppid, event->fork.ptid);
 
 	if (thread) {
-		rb_erase(&thread->rb_node, &session->host_machine.threads);
-		session->host_machine.last_match = NULL;
+		rb_erase(&thread->rb_node, &machine->threads);
+		machine->last_match = NULL;
 		thread__delete(thread);
 	}
 
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 4800f38..0cdc811 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -1,7 +1,6 @@
 #include <linux/types.h>
 #include "event.h"
 #include "debug.h"
-#include "session.h"
 #include "sort.h"
 #include "string.h"
 #include "strlist.h"
@@ -47,7 +46,7 @@ static struct perf_sample synth_sample = {
 static pid_t perf_event__synthesize_comm(struct perf_event_ops *ops,
 					 union perf_event *event, pid_t pid,
 					 int full, perf_event__handler_t process,
-					 struct perf_session *session)
+					 struct machine *machine)
 {
 	char filename[PATH_MAX];
 	char bf[BUFSIZ];
@@ -93,14 +92,14 @@ out_race:
 
 	event->comm.header.type = PERF_RECORD_COMM;
 	size = ALIGN(size, sizeof(u64));
-	memset(event->comm.comm + size, 0, session->id_hdr_size);
+	memset(event->comm.comm + size, 0, machine->id_hdr_size);
 	event->comm.header.size = (sizeof(event->comm) -
 				(sizeof(event->comm.comm) - size) +
-				session->id_hdr_size);
+				machine->id_hdr_size);
 	if (!full) {
 		event->comm.tid = pid;
 
-		process(ops, event, &synth_sample, session);
+		process(ops, event, &synth_sample, machine);
 		goto out;
 	}
 
@@ -118,7 +117,7 @@ out_race:
 
 		event->comm.tid = pid;
 
-		process(ops, event, &synth_sample, session);
+		process(ops, event, &synth_sample, machine);
 	}
 
 	closedir(tasks);
@@ -132,7 +131,7 @@ static int perf_event__synthesize_mmap_events(struct perf_event_ops *ops,
 					      union perf_event *event,
 					      pid_t pid, pid_t tgid,
 					      perf_event__handler_t process,
-					      struct perf_session *session)
+					      struct machine *machine)
 {
 	char filename[PATH_MAX];
 	FILE *fp;
@@ -195,12 +194,12 @@ static int perf_event__synthesize_mmap_events(struct perf_event_ops *ops,
 			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;
+			memset(event->mmap.filename + size, 0, machine->id_hdr_size);
+			event->mmap.header.size += machine->id_hdr_size;
 			event->mmap.pid = tgid;
 			event->mmap.tid = pid;
 
-			process(ops, event, &synth_sample, session);
+			process(ops, event, &synth_sample, machine);
 		}
 	}
 
@@ -210,13 +209,12 @@ static int perf_event__synthesize_mmap_events(struct perf_event_ops *ops,
 
 int perf_event__synthesize_modules(struct perf_event_ops *ops,
 				   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));
+					  machine->id_hdr_size));
 	if (event == NULL) {
 		pr_debug("Not enough memory synthesizing mmap event "
 			 "for kernel modules\n");
@@ -246,15 +244,15 @@ int perf_event__synthesize_modules(struct perf_event_ops *ops,
 		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;
+		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);
-		process(ops, event, &synth_sample, session);
+		process(ops, event, &synth_sample, machine);
 	}
 
 	free(event);
@@ -265,29 +263,29 @@ 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_event_ops *ops,
-				      struct perf_session *session)
+				      struct machine *machine)
 {
-	pid_t tgid = perf_event__synthesize_comm(ops, comm_event, pid, 1, process,
-					    session);
+	pid_t tgid = perf_event__synthesize_comm(ops, comm_event, pid, 1,
+						 process, machine);
 	if (tgid == -1)
 		return -1;
 	return perf_event__synthesize_mmap_events(ops, mmap_event, pid, tgid,
-					     process, session);
+						  process, machine);
 }
 
 int perf_event__synthesize_thread_map(struct perf_event_ops *ops,
 				      struct thread_map *threads,
 				      perf_event__handler_t process,
-				      struct perf_session *session)
+				      struct machine *machine)
 {
 	union perf_event *comm_event, *mmap_event;
 	int err = -1, thread;
 
-	comm_event = malloc(sizeof(comm_event->comm) + session->id_hdr_size);
+	comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 	if (comm_event == NULL)
 		goto out;
 
-	mmap_event = malloc(sizeof(mmap_event->mmap) + session->id_hdr_size);
+	mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 	if (mmap_event == NULL)
 		goto out_free_comm;
 
@@ -295,7 +293,7 @@ int perf_event__synthesize_thread_map(struct perf_event_ops *ops,
 	for (thread = 0; thread < threads->nr; ++thread) {
 		if (__event__synthesize_thread(comm_event, mmap_event,
 					       threads->map[thread],
-					       process, ops, session)) {
+					       process, ops, machine)) {
 			err = -1;
 			break;
 		}
@@ -309,18 +307,18 @@ out:
 
 int perf_event__synthesize_threads(struct perf_event_ops *ops,
 				   perf_event__handler_t process,
-				   struct perf_session *session)
+				   struct machine *machine)
 {
 	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);
+	comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 	if (comm_event == NULL)
 		goto out;
 
-	mmap_event = malloc(sizeof(mmap_event->mmap) + session->id_hdr_size);
+	mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 	if (mmap_event == NULL)
 		goto out_free_comm;
 
@@ -336,7 +334,7 @@ int perf_event__synthesize_threads(struct perf_event_ops *ops,
 			continue;
 
 		__event__synthesize_thread(comm_event, mmap_event, pid,
-					   process, ops, session);
+					   process, ops, machine);
 	}
 
 	closedir(proc);
@@ -373,7 +371,6 @@ static int find_symbol_cb(void *arg, const char *name, char type,
 
 int perf_event__synthesize_kernel_mmap(struct perf_event_ops *ops,
 				       perf_event__handler_t process,
-				       struct perf_session *session,
 				       struct machine *machine,
 				       const char *symbol_name)
 {
@@ -390,7 +387,7 @@ int perf_event__synthesize_kernel_mmap(struct perf_event_ops *ops,
 	 */
 	struct process_symbol_args args = { .name = symbol_name, };
 	union perf_event *event = zalloc((sizeof(event->mmap) +
-					  session->id_hdr_size));
+					  machine->id_hdr_size));
 	if (event == NULL) {
 		pr_debug("Not enough memory synthesizing mmap event "
 			 "for kernel modules\n");
@@ -424,13 +421,13 @@ int perf_event__synthesize_kernel_mmap(struct perf_event_ops *ops,
 	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);
+			(sizeof(event->mmap.filename) - size) + machine->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(ops, event, &synth_sample, session);
+	err = process(ops, event, &synth_sample, machine);
 	free(event);
 
 	return err;
@@ -439,9 +436,9 @@ int perf_event__synthesize_kernel_mmap(struct perf_event_ops *ops,
 int perf_event__process_comm(struct perf_event_ops *ops __used,
 			     union perf_event *event,
 			     struct perf_sample *sample __used,
-			     struct perf_session *session)
+			     struct machine *machine)
 {
-	struct thread *thread = perf_session__findnew(session, event->comm.tid);
+	struct thread *thread = machine__findnew_thread(machine, event->comm.tid);
 
 	dump_printf(": %s:%d\n", event->comm.comm, event->comm.tid);
 
@@ -456,11 +453,10 @@ int perf_event__process_comm(struct perf_event_ops *ops __used,
 int perf_event__process_lost(struct perf_event_ops *ops __used,
 			     union perf_event *event,
 			     struct perf_sample *sample __used,
-			     struct perf_session *session)
+			     struct machine *machine __used)
 {
 	dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
 		    event->lost.id, event->lost.lost);
-	session->hists.stats.total_lost += event->lost.lost;
 	return 0;
 }
 
@@ -479,20 +475,13 @@ static void perf_event__set_kernel_mmap_len(union perf_event *event,
 
 static int perf_event__process_kernel_mmap(struct perf_event_ops *ops __used,
 					   union perf_event *event,
-					   struct perf_session *session)
+					   struct machine *machine)
 {
 	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;
@@ -559,9 +548,9 @@ static int perf_event__process_kernel_mmap(struct perf_event_ops *ops __used,
 		 * 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);
+			maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
+							 symbol_name,
+							 event->mmap.pgoff);
 		}
 
 		if (machine__is_default_guest(machine)) {
@@ -580,9 +569,8 @@ out_problem:
 int perf_event__process_mmap(struct perf_event_ops *ops,
 			     union perf_event *event,
 			     struct perf_sample *sample __used,
-			     struct perf_session *session)
+			     struct machine *machine)
 {
-	struct machine *machine;
 	struct thread *thread;
 	struct map *map;
 	u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
@@ -594,16 +582,13 @@ int perf_event__process_mmap(struct perf_event_ops *ops,
 
 	if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
 	    cpumode == PERF_RECORD_MISC_KERNEL) {
-		ret = perf_event__process_kernel_mmap(ops, event, session);
+		ret = perf_event__process_kernel_mmap(ops, event, machine);
 		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);
+	thread = machine__findnew_thread(machine, event->mmap.pid);
 	if (thread == NULL)
 		goto out_problem;
 	map = map__new(&machine->user_dsos, event->mmap.start,
@@ -624,16 +609,16 @@ out_problem:
 int perf_event__process_task(struct perf_event_ops *ops __used,
 			     union perf_event *event,
 			     struct perf_sample *sample __used,
-			     struct perf_session *session)
+			      struct machine *machine)
 {
-	struct thread *thread = perf_session__findnew(session, event->fork.tid);
-	struct thread *parent = perf_session__findnew(session, event->fork.ptid);
+	struct thread *thread = machine__findnew_thread(machine, event->fork.tid);
+	struct thread *parent = machine__findnew_thread(machine, 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);
+		machine__remove_thread(machine, thread);
 		return 0;
 	}
 
@@ -647,21 +632,21 @@ int perf_event__process_task(struct perf_event_ops *ops __used,
 }
 
 int perf_event__process(struct perf_event_ops *ops, union perf_event *event,
-			struct perf_sample *sample, struct perf_session *session)
+			struct perf_sample *sample, struct machine *machine)
 {
 	switch (event->header.type) {
 	case PERF_RECORD_COMM:
-		perf_event__process_comm(ops, event, sample, session);
+		perf_event__process_comm(ops, event, sample, machine);
 		break;
 	case PERF_RECORD_MMAP:
-		perf_event__process_mmap(ops, event, sample, session);
+		perf_event__process_mmap(ops, event, sample, machine);
 		break;
 	case PERF_RECORD_FORK:
 	case PERF_RECORD_EXIT:
-		perf_event__process_task(ops, event, sample, session);
+		perf_event__process_task(ops, event, sample, machine);
 		break;
 	case PERF_RECORD_LOST:
-		perf_event__process_lost(ops, event, sample, session);
+		perf_event__process_lost(ops, event, sample, machine);
 	default:
 		break;
 	}
@@ -670,36 +655,29 @@ int perf_event__process(struct perf_event_ops *ops, union perf_event *event,
 }
 
 void thread__find_addr_map(struct thread *self,
-			   struct perf_session *session, u8 cpumode,
-			   enum map_type type, pid_t pid, u64 addr,
+			   struct machine *machine, u8 cpumode,
+			   enum map_type type, 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 (machine == NULL) {
+		al->map = NULL;
+		return;
+	}
+
 	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 {
 		/*
@@ -745,13 +723,12 @@ try_again:
 		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,
+void thread__find_addr_location(struct thread *thread, struct machine *machine,
+				u8 cpumode, enum map_type type, u64 addr,
 				struct addr_location *al,
 				symbol_filter_t filter)
 {
-	thread__find_addr_map(self, session, cpumode, type, pid, addr, al);
+	thread__find_addr_map(thread, machine, cpumode, type, addr, al);
 	if (al->map != NULL)
 		al->sym = map__find_symbol(al->map, al->addr, filter);
 	else
@@ -759,13 +736,13 @@ void thread__find_addr_location(struct thread *self,
 }
 
 int perf_event__preprocess_sample(const union perf_event *event,
-				  struct perf_session *session,
+				  struct machine *machine,
 				  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);
+	struct thread *thread = machine__findnew_thread(machine, event->ip.pid);
 
 	if (thread == NULL)
 		return -1;
@@ -776,18 +753,18 @@ int perf_event__preprocess_sample(const union perf_event *event,
 
 	dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
 	/*
-	 * Have we already created the kernel maps for the host machine?
+	 * Have we already created the kernel maps for this 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);
+	    machine->vmlinux_maps[MAP__FUNCTION] == NULL)
+		machine__create_kernel_maps(machine);
 
-	thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
-			      event->ip.pid, event->ip.ip, al);
+	thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
+			      event->ip.ip, al);
 	dump_printf(" ...... dso: %s\n",
 		    al->map ? al->map->dso->long_name :
 			al->level == 'H' ? "[hypervisor]" : "<not found>");
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 669409d..1564877 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -142,56 +142,53 @@ union perf_event {
 void perf_event__print_totals(void);
 
 struct perf_event_ops;
-struct perf_session;
 struct thread_map;
 
 typedef int (*perf_event__handler_t)(struct perf_event_ops *ops,
 				     union perf_event *event,
 				     struct perf_sample *sample,
-				      struct perf_session *session);
+				     struct machine *machine);
 
 int perf_event__synthesize_thread_map(struct perf_event_ops *ops,
 				      struct thread_map *threads,
 				      perf_event__handler_t process,
-				      struct perf_session *session);
+				      struct machine *machine);
 int perf_event__synthesize_threads(struct perf_event_ops *ops,
 				   perf_event__handler_t process,
-				   struct perf_session *session);
+				   struct machine *machine);
 int perf_event__synthesize_kernel_mmap(struct perf_event_ops *ops,
 				       perf_event__handler_t process,
-				       struct perf_session *session,
 				       struct machine *machine,
 				       const char *symbol_name);
 
 int perf_event__synthesize_modules(struct perf_event_ops *ops,
 				   perf_event__handler_t process,
-				   struct perf_session *session,
 				   struct machine *machine);
 
 int perf_event__process_comm(struct perf_event_ops *ops,
 			     union perf_event *event,
 			     struct perf_sample *sample,
-			     struct perf_session *session);
+			     struct machine *machine);
 int perf_event__process_lost(struct perf_event_ops *ops,
 			     union perf_event *event,
 			     struct perf_sample *sample,
-			     struct perf_session *session);
+			     struct machine *machine);
 int perf_event__process_mmap(struct perf_event_ops *ops,
 			     union perf_event *event,
 			     struct perf_sample *sample,
-			     struct perf_session *session);
+			     struct machine *machine);
 int perf_event__process_task(struct perf_event_ops *ops,
 			     union perf_event *event,
 			     struct perf_sample *sample,
-			     struct perf_session *session);
+			     struct machine *machine);
 int perf_event__process(struct perf_event_ops *ops,
 			union perf_event *event,
 			struct perf_sample *sample,
-			struct perf_session *session);
+			struct machine *machine);
 
 struct addr_location;
 int perf_event__preprocess_sample(const union perf_event *self,
-				  struct perf_session *session,
+				  struct machine *machine,
 				  struct addr_location *al,
 				  struct perf_sample *sample,
 				  symbol_filter_t filter);
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index ab3a2b0..db280d6 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2072,8 +2072,7 @@ out_delete_evlist:
 
 int perf_event__synthesize_attr(struct perf_event_ops *ops,
 				struct perf_event_attr *attr, u16 ids, u64 *id,
-				perf_event__handler_t process,
-				struct perf_session *session)
+				perf_event__handler_t process)
 {
 	union perf_event *ev;
 	size_t size;
@@ -2095,7 +2094,7 @@ int perf_event__synthesize_attr(struct perf_event_ops *ops,
 	ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
 	ev->attr.header.size = size;
 
-	err = process(ops, ev, NULL, session);
+	err = process(ops, ev, NULL, NULL);
 
 	free(ev);
 
@@ -2111,7 +2110,7 @@ int perf_event__synthesize_attrs(struct perf_event_ops *ops,
 
 	list_for_each_entry(attr, &session->evlist->entries, node) {
 		err = perf_event__synthesize_attr(ops, &attr->attr, attr->ids,
-						  attr->id, process, session);
+						  attr->id, process);
 		if (err) {
 			pr_debug("failed to create perf header attribute\n");
 			return err;
@@ -2161,7 +2160,7 @@ int perf_event__process_attr(union perf_event *event,
 int perf_event__synthesize_event_type(struct perf_event_ops *ops,
 				      u64 event_id, char *name,
 				      perf_event__handler_t process,
-				      struct perf_session *session)
+				      struct machine *machine)
 {
 	union perf_event ev;
 	size_t size = 0;
@@ -2179,14 +2178,14 @@ int perf_event__synthesize_event_type(struct perf_event_ops *ops,
 	ev.event_type.header.size = sizeof(ev.event_type) -
 		(sizeof(ev.event_type.event_type.name) - size);
 
-	err = process(ops, &ev, NULL, session);
+	err = process(ops, &ev, NULL, machine);
 
 	return err;
 }
 
 int perf_event__synthesize_event_types(struct perf_event_ops *ops,
 				       perf_event__handler_t process,
-				       struct perf_session *session)
+				       struct machine *machine)
 {
 	struct perf_trace_event_type *type;
 	int i, err = 0;
@@ -2196,7 +2195,7 @@ int perf_event__synthesize_event_types(struct perf_event_ops *ops,
 
 		err = perf_event__synthesize_event_type(ops, type->event_id,
 							type->name, process,
-							session);
+							machine);
 		if (err) {
 			pr_debug("failed to create perf header event type\n");
 			return err;
@@ -2207,8 +2206,7 @@ int perf_event__synthesize_event_types(struct perf_event_ops *ops,
 }
 
 int perf_event__process_event_type(struct perf_event_ops *ops __unused,
-				   union perf_event *event,
-				   struct perf_session *session __unused)
+				   union perf_event *event)
 {
 	if (perf_header__push_event(event->event_type.event_type.event_id,
 				    event->event_type.event_type.name) < 0)
@@ -2219,8 +2217,7 @@ int perf_event__process_event_type(struct perf_event_ops *ops __unused,
 
 int perf_event__synthesize_tracing_data(struct perf_event_ops *ops, int fd,
 					struct perf_evlist *evlist,
-					 perf_event__handler_t process,
-				   struct perf_session *session __unused)
+					perf_event__handler_t process)
 {
 	union perf_event ev;
 	struct tracing_data *tdata;
@@ -2251,7 +2248,7 @@ int perf_event__synthesize_tracing_data(struct perf_event_ops *ops, int fd,
 	ev.tracing_data.header.size = sizeof(ev.tracing_data);
 	ev.tracing_data.size = aligned_size;
 
-	process(ops, &ev, NULL, session);
+	process(ops, &ev, NULL, NULL);
 
 	/*
 	 * The put function will copy all the tracing data
@@ -2296,8 +2293,7 @@ int perf_event__process_tracing_data(union perf_event *event,
 int perf_event__synthesize_build_id(struct perf_event_ops *ops,
 				    struct dso *pos, u16 misc,
 				    perf_event__handler_t process,
-				    struct machine *machine,
-				    struct perf_session *session)
+				    struct machine *machine)
 {
 	union perf_event ev;
 	size_t len;
@@ -2317,7 +2313,7 @@ int perf_event__synthesize_build_id(struct perf_event_ops *ops,
 	ev.build_id.header.size = sizeof(ev.build_id) + len;
 	memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
 
-	err = process(ops, &ev, NULL, session);
+	err = process(ops, &ev, NULL, machine);
 
 	return err;
 }
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index 54dae5f..a604962 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -99,8 +99,7 @@ int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir);
 
 int perf_event__synthesize_attr(struct perf_event_ops *ops,
 				struct perf_event_attr *attr, u16 ids, u64 *id,
-				perf_event__handler_t process,
-				struct perf_session *session);
+				perf_event__handler_t process);
 int perf_event__synthesize_attrs(struct perf_event_ops *ops,
 				 struct perf_session *session,
 				 perf_event__handler_t process);
@@ -109,26 +108,23 @@ int perf_event__process_attr(union perf_event *event, struct perf_evlist **pevli
 int perf_event__synthesize_event_type(struct perf_event_ops *ops,
 				      u64 event_id, char *name,
 				      perf_event__handler_t process,
-				      struct perf_session *session);
+				      struct machine *machine);
 int perf_event__synthesize_event_types(struct perf_event_ops *ops,
 				       perf_event__handler_t process,
-				       struct perf_session *session);
+				       struct machine *machine);
 int perf_event__process_event_type(struct perf_event_ops *ops,
-				   union perf_event *event,
-				   struct perf_session *session);
+				   union perf_event *event);
 
 int perf_event__synthesize_tracing_data(struct perf_event_ops *ops,
 					int fd, struct perf_evlist *evlist,
-					perf_event__handler_t process,
-					struct perf_session *session);
+					perf_event__handler_t process);
 int perf_event__process_tracing_data(union perf_event *event,
 				     struct perf_session *session);
 
 int perf_event__synthesize_build_id(struct perf_event_ops *ops,
 				    struct dso *pos, u16 misc,
 				    perf_event__handler_t process,
-				    struct machine *machine,
-				    struct perf_session *session);
+				    struct machine *machine);
 int perf_event__process_build_id(struct perf_event_ops *ops,
 				 union perf_event *event,
 				 struct perf_session *session);
diff --git a/tools/perf/util/map.h b/tools/perf/util/map.h
index bde6835..2b8017f 100644
--- a/tools/perf/util/map.h
+++ b/tools/perf/util/map.h
@@ -18,9 +18,11 @@ enum map_type {
 extern const char *map_type__name[MAP__NR_TYPES];
 
 struct dso;
+struct ip_callchain;
 struct ref_reloc_sym;
 struct map_groups;
 struct machine;
+struct perf_evsel;
 
 struct map {
 	union {
@@ -61,6 +63,7 @@ struct map_groups {
 struct machine {
 	struct rb_node	  rb_node;
 	pid_t		  pid;
+	u16		  id_hdr_size;
 	char		  *root_dir;
 	struct rb_root	  threads;
 	struct list_head  dead_threads;
@@ -151,6 +154,13 @@ int machine__init(struct machine *self, const char *root_dir, pid_t pid);
 void machine__exit(struct machine *self);
 void machine__delete(struct machine *self);
 
+int machine__resolve_callchain(struct machine *machine,
+			       struct perf_evsel *evsel, struct thread *thread,
+			       struct ip_callchain *chain,
+			       struct symbol **parent);
+int maps__set_kallsyms_ref_reloc_sym(struct map **maps, const char *symbol_name,
+				     u64 addr);
+
 /*
  * Default guest kernel is defined by parameter --guestkallsyms
  * and --guestmodules
diff --git a/tools/perf/util/scripting-engines/trace-event-perl.c b/tools/perf/util/scripting-engines/trace-event-perl.c
index 74350ff..a82ce43 100644
--- a/tools/perf/util/scripting-engines/trace-event-perl.c
+++ b/tools/perf/util/scripting-engines/trace-event-perl.c
@@ -27,6 +27,8 @@
 
 #include "../../perf.h"
 #include "../util.h"
+#include "../thread.h"
+#include "../event.h"
 #include "../trace-event.h"
 
 #include <EXTERN.h>
@@ -248,7 +250,7 @@ static inline struct event *find_cache_event(int type)
 static void perl_process_event(union perf_event *pevent __unused,
 			       struct perf_sample *sample,
 			       struct perf_evsel *evsel,
-			       struct perf_session *session __unused,
+			       struct machine *machine __unused,
 			       struct thread *thread)
 {
 	struct format_field *field;
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index 6ccf70e..0b2a487 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -29,6 +29,8 @@
 
 #include "../../perf.h"
 #include "../util.h"
+#include "../event.h"
+#include "../thread.h"
 #include "../trace-event.h"
 
 PyMODINIT_FUNC initperf_trace_context(void);
@@ -207,7 +209,7 @@ static inline struct event *find_cache_event(int type)
 static void python_process_event(union perf_event *pevent __unused,
 				 struct perf_sample *sample,
 				 struct perf_evsel *evsel __unused,
-				 struct perf_session *session __unused,
+				 struct machine *machine __unused,
 				 struct thread *thread)
 {
 	PyObject *handler, *retval, *context, *t, *obj, *dict = NULL;
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index a36023a..be33606 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -84,6 +84,7 @@ void perf_session__update_sample_type(struct perf_session *self)
 	self->sample_size = __perf_evsel__sample_size(self->sample_type);
 	self->sample_id_all = perf_evlist__sample_id_all(self->evlist);
 	self->id_hdr_size = perf_evlist__id_hdr_size(self->evlist);
+	self->host_machine.id_hdr_size = self->id_hdr_size;
 }
 
 int perf_session__create_kernel_maps(struct perf_session *self)
@@ -216,10 +217,10 @@ static bool symbol__match_parent_regex(struct symbol *sym)
 	return 0;
 }
 
-int perf_session__resolve_callchain(struct perf_session *self, struct perf_evsel *evsel,
-				    struct thread *thread,
-				    struct ip_callchain *chain,
-				    struct symbol **parent)
+int machine__resolve_callchain(struct machine *self, struct perf_evsel *evsel,
+			       struct thread *thread,
+			       struct ip_callchain *chain,
+			       struct symbol **parent)
 {
 	u8 cpumode = PERF_RECORD_MISC_USER;
 	unsigned int i;
@@ -252,7 +253,7 @@ int perf_session__resolve_callchain(struct perf_session *self, struct perf_evsel
 
 		al.filtered = false;
 		thread__find_addr_location(thread, self, cpumode,
-				MAP__FUNCTION, thread->pid, ip, &al, NULL);
+					   MAP__FUNCTION, ip, &al, NULL);
 		if (al.sym != NULL) {
 			if (sort__has_parent && !*parent &&
 			    symbol__match_parent_regex(al.sym))
@@ -270,14 +271,6 @@ int perf_session__resolve_callchain(struct perf_session *self, struct perf_evsel
 	return 0;
 }
 
-static int process_event_synth_stub(struct perf_event_ops *ops __used,
-				    union perf_event *event __used,
-				    struct perf_session *session __used)
-{
-	dump_printf(": unhandled!\n");
-	return 0;
-}
-
 static int process_event_synth_tracing_data_stub(union perf_event *event __used,
 						 struct perf_session *session __used)
 {
@@ -296,7 +289,7 @@ static int process_event_sample_stub(struct perf_event_ops *ops __used,
 				     union perf_event *event __used,
 				     struct perf_sample *sample __used,
 				     struct perf_evsel *evsel __used,
-				     struct perf_session *session __used)
+				     struct machine *machine __used)
 {
 	dump_printf(": unhandled!\n");
 	return 0;
@@ -305,7 +298,7 @@ static int process_event_sample_stub(struct perf_event_ops *ops __used,
 static int process_event_stub(struct perf_event_ops *ops __used,
 			      union perf_event *event __used,
 			      struct perf_sample *sample __used,
-			      struct perf_session *session __used)
+			      struct machine *machine __used)
 {
 	dump_printf(": unhandled!\n");
 	return 0;
@@ -313,7 +306,14 @@ static int process_event_stub(struct perf_event_ops *ops __used,
 
 static int process_finished_round_stub(struct perf_event_ops *ops __used,
 				       union perf_event *event __used,
-				       struct perf_session *session __used)
+				       struct perf_session *perf_session __used)
+{
+	dump_printf(": unhandled!\n");
+	return 0;
+}
+
+static int process_event_type_stub(struct perf_event_ops *ops __used,
+				   union perf_event *event __used)
 {
 	dump_printf(": unhandled!\n");
 	return 0;
@@ -338,7 +338,7 @@ static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
 	if (handler->lost == NULL)
 		handler->lost = perf_event__process_lost;
 	if (handler->read == NULL)
-		handler->read = process_event_stub;
+		handler->read = process_event_sample_stub;
 	if (handler->throttle == NULL)
 		handler->throttle = process_event_stub;
 	if (handler->unthrottle == NULL)
@@ -346,11 +346,11 @@ static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
 	if (handler->attr == NULL)
 		handler->attr = process_event_synth_attr_stub;
 	if (handler->event_type == NULL)
-		handler->event_type = process_event_synth_stub;
+		handler->event_type = process_event_type_stub;
 	if (handler->tracing_data == NULL)
 		handler->tracing_data = process_event_synth_tracing_data_stub;
 	if (handler->build_id == NULL)
-		handler->build_id = process_event_synth_stub;
+		handler->build_id = process_finished_round_stub;
 	if (handler->finished_round == NULL) {
 		if (handler->ordered_samples)
 			handler->finished_round = process_finished_round;
@@ -734,6 +734,18 @@ static void dump_sample(struct perf_session *session, union perf_event *event,
 		callchain__printf(sample);
 }
 
+static struct machine *
+	perf_session__find_machine_for_cpumode(struct perf_session *session,
+					       union perf_event *event)
+{
+	const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
+
+	if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest)
+		return perf_session__find_machine(session, event->ip.pid);
+
+	return perf_session__find_host_machine(session);
+}
+
 static int perf_session_deliver_event(struct perf_session *session,
 				      union perf_event *event,
 				      struct perf_sample *sample,
@@ -741,6 +753,7 @@ static int perf_session_deliver_event(struct perf_session *session,
 				      u64 file_offset)
 {
 	struct perf_evsel *evsel;
+	struct machine *machine;
 
 	dump_event(session, event, file_offset, sample);
 
@@ -762,6 +775,8 @@ static int perf_session_deliver_event(struct perf_session *session,
 		hists__inc_nr_events(&evsel->hists, event->header.type);
 	}
 
+	machine = perf_session__find_machine_for_cpumode(session, event);
+
 	switch (event->header.type) {
 	case PERF_RECORD_SAMPLE:
 		dump_sample(session, event, sample);
@@ -769,23 +784,25 @@ static int perf_session_deliver_event(struct perf_session *session,
 			++session->hists.stats.nr_unknown_id;
 			return -1;
 		}
-		return ops->sample(ops, event, sample, evsel, session);
+		return ops->sample(ops, event, sample, evsel, machine);
 	case PERF_RECORD_MMAP:
-		return ops->mmap(ops, event, sample, session);
+		return ops->mmap(ops, event, sample, machine);
 	case PERF_RECORD_COMM:
-		return ops->comm(ops, event, sample, session);
+		return ops->comm(ops, event, sample, machine);
 	case PERF_RECORD_FORK:
-		return ops->fork(ops, event, sample, session);
+		return ops->fork(ops, event, sample, machine);
 	case PERF_RECORD_EXIT:
-		return ops->exit(ops, event, sample, session);
+		return ops->exit(ops, event, sample, machine);
 	case PERF_RECORD_LOST:
-		return ops->lost(ops, event, sample, session);
+		if (ops->lost == perf_event__process_lost)
+			session->hists.stats.total_lost += event->lost.lost;
+		return ops->lost(ops, event, sample, machine);
 	case PERF_RECORD_READ:
-		return ops->read(ops, event, sample, session);
+		return ops->read(ops, event, sample, evsel, machine);
 	case PERF_RECORD_THROTTLE:
-		return ops->throttle(ops, event, sample, session);
+		return ops->throttle(ops, event, sample, machine);
 	case PERF_RECORD_UNTHROTTLE:
-		return ops->unthrottle(ops, event, sample, session);
+		return ops->unthrottle(ops, event, sample, machine);
 	default:
 		++session->hists.stats.nr_unknown_events;
 		return -1;
@@ -823,7 +840,7 @@ static int perf_session__process_user_event(struct perf_session *session, union
 			perf_session__update_sample_type(session);
 		return err;
 	case PERF_RECORD_HEADER_EVENT_TYPE:
-		return ops->event_type(ops, event, session);
+		return ops->event_type(ops, event);
 	case PERF_RECORD_HEADER_TRACING_DATA:
 		/* setup for reading amidst mmap */
 		lseek(session->fd, file_offset, SEEK_SET);
@@ -1170,9 +1187,8 @@ bool perf_session__has_traces(struct perf_session *self, const char *msg)
 	return true;
 }
 
-int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps,
-					     const char *symbol_name,
-					     u64 addr)
+int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
+				     const char *symbol_name, u64 addr)
 {
 	char *bracket;
 	enum map_type i;
@@ -1264,17 +1280,16 @@ struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
 	return NULL;
 }
 
-void perf_session__print_ip(union perf_event *event, struct perf_evsel *evsel,
-			    struct perf_sample *sample,
-			    struct perf_session *session,
-			    int print_sym, int print_dso)
+void perf_event__print_ip(union perf_event *event, struct perf_sample *sample,
+			  struct machine *machine, struct perf_evsel *evsel,
+			  int print_sym, int print_dso)
 {
 	struct addr_location al;
 	const char *symname, *dsoname;
 	struct callchain_cursor *cursor = &evsel->hists.callchain_cursor;
 	struct callchain_cursor_node *node;
 
-	if (perf_event__preprocess_sample(event, session, &al, sample,
+	if (perf_event__preprocess_sample(event, machine, &al, sample,
 					  NULL) < 0) {
 		error("problem processing %d event, skipping it.\n",
 			event->header.type);
@@ -1283,7 +1298,7 @@ void perf_session__print_ip(union perf_event *event, struct perf_evsel *evsel,
 
 	if (symbol_conf.use_callchain && sample->callchain) {
 
-		if (perf_session__resolve_callchain(session, evsel, al.thread,
+		if (machine__resolve_callchain(machine, evsel, al.thread,
 						sample->callchain, NULL) != 0) {
 			if (verbose)
 				error("Failed to resolve callchain. Skipping\n");
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 6de3d13..1c5823c 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -58,32 +58,34 @@ struct perf_event_ops;
 
 typedef int (*event_sample)(struct perf_event_ops *ops,
 			    union perf_event *event, struct perf_sample *sample,
-			    struct perf_evsel *evsel, struct perf_session *session);
+			    struct perf_evsel *evsel, struct machine *machine);
 typedef int (*event_op)(struct perf_event_ops *ops, union perf_event *event,
 			struct perf_sample *sample,
-			struct perf_session *session);
+			struct machine *machine);
 typedef int (*event_synth_op)(union perf_event *self,
 			      struct perf_session *session);
 typedef int (*event_attr_op)(union perf_event *event,
 			     struct perf_evlist **pevlist);
+typedef int (*event_simple_op)(struct perf_event_ops *ops,
+			       union perf_event *event);
 typedef int (*event_op2)(struct perf_event_ops *ops, union perf_event *event,
 			 struct perf_session *session);
 
 struct perf_event_ops {
-	event_sample	sample;
+	event_sample	sample,
+			read;
 	event_op	mmap,
 			comm,
 			fork,
 			exit,
 			lost,
-			read,
 			throttle,
 			unthrottle;
 	event_attr_op	attr;
 	event_synth_op	tracing_data;
-	event_op2	event_type,
-			build_id,
-			finished_round;
+	event_simple_op	event_type;
+	event_op2	finished_round,
+			build_id;
 	bool		ordered_samples;
 	bool		ordering_requires_timestamps;
 };
@@ -108,10 +110,6 @@ int perf_session__resolve_callchain(struct perf_session *self, struct perf_evsel
 
 bool perf_session__has_traces(struct perf_session *self, const char *msg);
 
-int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps,
-					     const char *symbol_name,
-					     u64 addr);
-
 void mem_bswap_64(void *src, int byte_size);
 void perf_event__attr_swap(struct perf_event_attr *attr);
 
@@ -151,6 +149,9 @@ void perf_session__process_machines(struct perf_session *self,
 	return machines__process(&self->machines, process, ops);
 }
 
+struct thread *perf_session__findnew(struct perf_session *self, pid_t pid);
+size_t perf_session__fprintf(struct perf_session *self, FILE *fp);
+
 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp);
 
 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self,
@@ -171,10 +172,9 @@ static inline int perf_session__parse_sample(struct perf_session *session,
 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
 					    unsigned int type);
 
-void perf_session__print_ip(union perf_event *event, struct perf_evsel *evsel,
-				 struct perf_sample *sample,
-				 struct perf_session *session,
-				 int print_sym, int print_dso);
+void perf_event__print_ip(union perf_event *event, struct perf_sample *sample,
+			  struct machine *machine, struct perf_evsel *evsel,
+			  int print_sym, int print_dso);
 
 int perf_session__cpu_bitmap(struct perf_session *session,
 			     const char *cpu_list, unsigned long *cpu_bitmap);
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index e5f2401..70c2c13 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -18,16 +18,14 @@ struct thread {
 	int			comm_len;
 };
 
-struct perf_session;
+struct machine;
 
 void thread__delete(struct thread *self);
 
 int thread__set_comm(struct thread *self, const char *comm);
 int thread__comm_len(struct thread *self);
-struct thread *perf_session__findnew(struct perf_session *self, pid_t pid);
 void thread__insert_map(struct thread *self, struct map *map);
 int thread__fork(struct thread *self, struct thread *parent);
-size_t perf_session__fprintf(struct perf_session *self, FILE *fp);
 
 static inline struct map *thread__find_map(struct thread *self,
 					   enum map_type type, u64 addr)
@@ -35,14 +33,12 @@ static inline struct map *thread__find_map(struct thread *self,
 	return self ? map_groups__find(&self->mg, type, addr) : NULL;
 }
 
-void thread__find_addr_map(struct thread *self,
-			   struct perf_session *session, u8 cpumode,
-			   enum map_type type, pid_t pid, u64 addr,
+void thread__find_addr_map(struct thread *thread, struct machine *machine,
+			   u8 cpumode, enum map_type type, u64 addr,
 			   struct addr_location *al);
 
-void thread__find_addr_location(struct thread *self,
-				struct perf_session *session, u8 cpumode,
-				enum map_type type, pid_t pid, u64 addr,
+void thread__find_addr_location(struct thread *thread, struct machine *machine,
+				u8 cpumode, enum map_type type, u64 addr,
 				struct addr_location *al,
 				symbol_filter_t filter);
 #endif	/* __PERF_THREAD_H */
diff --git a/tools/perf/util/trace-event-scripting.c b/tools/perf/util/trace-event-scripting.c
index c9dcbec..a3fdf55 100644
--- a/tools/perf/util/trace-event-scripting.c
+++ b/tools/perf/util/trace-event-scripting.c
@@ -39,7 +39,7 @@ static int stop_script_unsupported(void)
 static void process_event_unsupported(union perf_event *event __unused,
 				      struct perf_sample *sample __unused,
 				      struct perf_evsel *evsel __unused,
-				      struct perf_session *session __unused,
+				      struct machine *machine __unused,
 				      struct thread *thread __unused)
 {
 }
diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h
index a841008..58ae14c 100644
--- a/tools/perf/util/trace-event.h
+++ b/tools/perf/util/trace-event.h
@@ -3,7 +3,11 @@
 
 #include <stdbool.h>
 #include "parse-events.h"
-#include "session.h"
+
+struct machine;
+struct perf_sample;
+union perf_event;
+struct thread;
 
 #define __unused __attribute__((unused))
 
@@ -292,7 +296,7 @@ struct scripting_ops {
 	void (*process_event) (union perf_event *event,
 			       struct perf_sample *sample,
 			       struct perf_evsel *evsel,
-			       struct perf_session *session,
+			       struct machine *machine,
 			       struct thread *thread);
 	int (*generate_script) (const char *outfile);
 };