v4.19.13 snapshot.
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
new file mode 100644
index 0000000..8ee8ab3
--- /dev/null
+++ b/tools/perf/util/machine.c
@@ -0,0 +1,2595 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <dirent.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <regex.h>
+#include "callchain.h"
+#include "debug.h"
+#include "event.h"
+#include "evsel.h"
+#include "hist.h"
+#include "machine.h"
+#include "map.h"
+#include "sort.h"
+#include "strlist.h"
+#include "thread.h"
+#include "vdso.h"
+#include <stdbool.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include "unwind.h"
+#include "linux/hash.h"
+#include "asm/bug.h"
+
+#include "sane_ctype.h"
+#include <symbol/kallsyms.h>
+#include <linux/mman.h>
+
+static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock);
+
+static void dsos__init(struct dsos *dsos)
+{
+ INIT_LIST_HEAD(&dsos->head);
+ dsos->root = RB_ROOT;
+ init_rwsem(&dsos->lock);
+}
+
+static void machine__threads_init(struct machine *machine)
+{
+ int i;
+
+ for (i = 0; i < THREADS__TABLE_SIZE; i++) {
+ struct threads *threads = &machine->threads[i];
+ threads->entries = RB_ROOT;
+ init_rwsem(&threads->lock);
+ threads->nr = 0;
+ INIT_LIST_HEAD(&threads->dead);
+ threads->last_match = NULL;
+ }
+}
+
+static int machine__set_mmap_name(struct machine *machine)
+{
+ if (machine__is_host(machine))
+ machine->mmap_name = strdup("[kernel.kallsyms]");
+ else if (machine__is_default_guest(machine))
+ machine->mmap_name = strdup("[guest.kernel.kallsyms]");
+ else if (asprintf(&machine->mmap_name, "[guest.kernel.kallsyms.%d]",
+ machine->pid) < 0)
+ machine->mmap_name = NULL;
+
+ return machine->mmap_name ? 0 : -ENOMEM;
+}
+
+int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
+{
+ int err = -ENOMEM;
+
+ memset(machine, 0, sizeof(*machine));
+ map_groups__init(&machine->kmaps, machine);
+ RB_CLEAR_NODE(&machine->rb_node);
+ dsos__init(&machine->dsos);
+
+ machine__threads_init(machine);
+
+ machine->vdso_info = NULL;
+ machine->env = NULL;
+
+ machine->pid = pid;
+
+ machine->id_hdr_size = 0;
+ machine->kptr_restrict_warned = false;
+ machine->comm_exec = false;
+ machine->kernel_start = 0;
+ machine->vmlinux_map = NULL;
+
+ machine->root_dir = strdup(root_dir);
+ if (machine->root_dir == NULL)
+ return -ENOMEM;
+
+ if (machine__set_mmap_name(machine))
+ goto out;
+
+ if (pid != HOST_KERNEL_ID) {
+ struct thread *thread = machine__findnew_thread(machine, -1,
+ pid);
+ char comm[64];
+
+ if (thread == NULL)
+ goto out;
+
+ snprintf(comm, sizeof(comm), "[guest/%d]", pid);
+ thread__set_comm(thread, comm, 0);
+ thread__put(thread);
+ }
+
+ machine->current_tid = NULL;
+ err = 0;
+
+out:
+ if (err) {
+ zfree(&machine->root_dir);
+ zfree(&machine->mmap_name);
+ }
+ return 0;
+}
+
+struct machine *machine__new_host(void)
+{
+ struct machine *machine = malloc(sizeof(*machine));
+
+ if (machine != NULL) {
+ machine__init(machine, "", HOST_KERNEL_ID);
+
+ if (machine__create_kernel_maps(machine) < 0)
+ goto out_delete;
+ }
+
+ return machine;
+out_delete:
+ free(machine);
+ return NULL;
+}
+
+struct machine *machine__new_kallsyms(void)
+{
+ struct machine *machine = machine__new_host();
+ /*
+ * FIXME:
+ * 1) We should switch to machine__load_kallsyms(), i.e. not explicitely
+ * ask for not using the kcore parsing code, once this one is fixed
+ * to create a map per module.
+ */
+ if (machine && machine__load_kallsyms(machine, "/proc/kallsyms") <= 0) {
+ machine__delete(machine);
+ machine = NULL;
+ }
+
+ return machine;
+}
+
+static void dsos__purge(struct dsos *dsos)
+{
+ struct dso *pos, *n;
+
+ down_write(&dsos->lock);
+
+ list_for_each_entry_safe(pos, n, &dsos->head, node) {
+ RB_CLEAR_NODE(&pos->rb_node);
+ pos->root = NULL;
+ list_del_init(&pos->node);
+ dso__put(pos);
+ }
+
+ up_write(&dsos->lock);
+}
+
+static void dsos__exit(struct dsos *dsos)
+{
+ dsos__purge(dsos);
+ exit_rwsem(&dsos->lock);
+}
+
+void machine__delete_threads(struct machine *machine)
+{
+ struct rb_node *nd;
+ int i;
+
+ for (i = 0; i < THREADS__TABLE_SIZE; i++) {
+ struct threads *threads = &machine->threads[i];
+ down_write(&threads->lock);
+ nd = rb_first(&threads->entries);
+ while (nd) {
+ struct thread *t = rb_entry(nd, struct thread, rb_node);
+
+ nd = rb_next(nd);
+ __machine__remove_thread(machine, t, false);
+ }
+ up_write(&threads->lock);
+ }
+}
+
+void machine__exit(struct machine *machine)
+{
+ int i;
+
+ if (machine == NULL)
+ return;
+
+ machine__destroy_kernel_maps(machine);
+ map_groups__exit(&machine->kmaps);
+ dsos__exit(&machine->dsos);
+ machine__exit_vdso(machine);
+ zfree(&machine->root_dir);
+ zfree(&machine->mmap_name);
+ zfree(&machine->current_tid);
+
+ for (i = 0; i < THREADS__TABLE_SIZE; i++) {
+ struct threads *threads = &machine->threads[i];
+ exit_rwsem(&threads->lock);
+ }
+}
+
+void machine__delete(struct machine *machine)
+{
+ if (machine) {
+ machine__exit(machine);
+ free(machine);
+ }
+}
+
+void machines__init(struct machines *machines)
+{
+ machine__init(&machines->host, "", HOST_KERNEL_ID);
+ machines->guests = RB_ROOT;
+}
+
+void machines__exit(struct machines *machines)
+{
+ machine__exit(&machines->host);
+ /* XXX exit guest */
+}
+
+struct machine *machines__add(struct machines *machines, pid_t pid,
+ const char *root_dir)
+{
+ struct rb_node **p = &machines->guests.rb_node;
+ struct rb_node *parent = NULL;
+ struct machine *pos, *machine = malloc(sizeof(*machine));
+
+ if (machine == NULL)
+ return NULL;
+
+ if (machine__init(machine, root_dir, pid) != 0) {
+ free(machine);
+ return NULL;
+ }
+
+ while (*p != NULL) {
+ parent = *p;
+ pos = rb_entry(parent, struct machine, rb_node);
+ if (pid < pos->pid)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ rb_link_node(&machine->rb_node, parent, p);
+ rb_insert_color(&machine->rb_node, &machines->guests);
+
+ return machine;
+}
+
+void machines__set_comm_exec(struct machines *machines, bool comm_exec)
+{
+ struct rb_node *nd;
+
+ machines->host.comm_exec = comm_exec;
+
+ for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
+ struct machine *machine = rb_entry(nd, struct machine, rb_node);
+
+ machine->comm_exec = comm_exec;
+ }
+}
+
+struct machine *machines__find(struct machines *machines, pid_t pid)
+{
+ struct rb_node **p = &machines->guests.rb_node;
+ struct rb_node *parent = NULL;
+ struct machine *machine;
+ struct machine *default_machine = NULL;
+
+ if (pid == HOST_KERNEL_ID)
+ return &machines->host;
+
+ while (*p != NULL) {
+ parent = *p;
+ machine = rb_entry(parent, struct machine, rb_node);
+ if (pid < machine->pid)
+ p = &(*p)->rb_left;
+ else if (pid > machine->pid)
+ p = &(*p)->rb_right;
+ else
+ return machine;
+ if (!machine->pid)
+ default_machine = machine;
+ }
+
+ return default_machine;
+}
+
+struct machine *machines__findnew(struct machines *machines, pid_t pid)
+{
+ char path[PATH_MAX];
+ const char *root_dir = "";
+ struct machine *machine = machines__find(machines, pid);
+
+ if (machine && (machine->pid == pid))
+ goto out;
+
+ if ((pid != HOST_KERNEL_ID) &&
+ (pid != DEFAULT_GUEST_KERNEL_ID) &&
+ (symbol_conf.guestmount)) {
+ sprintf(path, "%s/%d", symbol_conf.guestmount, pid);
+ if (access(path, R_OK)) {
+ static struct strlist *seen;
+
+ if (!seen)
+ seen = strlist__new(NULL, NULL);
+
+ if (!strlist__has_entry(seen, path)) {
+ pr_err("Can't access file %s\n", path);
+ strlist__add(seen, path);
+ }
+ machine = NULL;
+ goto out;
+ }
+ root_dir = path;
+ }
+
+ machine = machines__add(machines, pid, root_dir);
+out:
+ return machine;
+}
+
+void machines__process_guests(struct machines *machines,
+ machine__process_t process, void *data)
+{
+ struct rb_node *nd;
+
+ for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
+ struct machine *pos = rb_entry(nd, struct machine, rb_node);
+ process(pos, data);
+ }
+}
+
+void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size)
+{
+ struct rb_node *node;
+ struct machine *machine;
+
+ machines->host.id_hdr_size = id_hdr_size;
+
+ for (node = rb_first(&machines->guests); node; node = rb_next(node)) {
+ machine = rb_entry(node, struct machine, rb_node);
+ machine->id_hdr_size = id_hdr_size;
+ }
+
+ return;
+}
+
+static void machine__update_thread_pid(struct machine *machine,
+ struct thread *th, pid_t pid)
+{
+ struct thread *leader;
+
+ if (pid == th->pid_ || pid == -1 || th->pid_ != -1)
+ return;
+
+ th->pid_ = pid;
+
+ if (th->pid_ == th->tid)
+ return;
+
+ leader = __machine__findnew_thread(machine, th->pid_, th->pid_);
+ if (!leader)
+ goto out_err;
+
+ if (!leader->mg)
+ leader->mg = map_groups__new(machine);
+
+ if (!leader->mg)
+ goto out_err;
+
+ if (th->mg == leader->mg)
+ return;
+
+ if (th->mg) {
+ /*
+ * Maps are created from MMAP events which provide the pid and
+ * tid. Consequently there never should be any maps on a thread
+ * with an unknown pid. Just print an error if there are.
+ */
+ if (!map_groups__empty(th->mg))
+ pr_err("Discarding thread maps for %d:%d\n",
+ th->pid_, th->tid);
+ map_groups__put(th->mg);
+ }
+
+ th->mg = map_groups__get(leader->mg);
+out_put:
+ thread__put(leader);
+ return;
+out_err:
+ pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid);
+ goto out_put;
+}
+
+/*
+ * Front-end cache - TID lookups come in blocks,
+ * so most of the time we dont have to look up
+ * the full rbtree:
+ */
+static struct thread*
+__threads__get_last_match(struct threads *threads, struct machine *machine,
+ int pid, int tid)
+{
+ struct thread *th;
+
+ th = threads->last_match;
+ if (th != NULL) {
+ if (th->tid == tid) {
+ machine__update_thread_pid(machine, th, pid);
+ return thread__get(th);
+ }
+
+ threads->last_match = NULL;
+ }
+
+ return NULL;
+}
+
+static struct thread*
+threads__get_last_match(struct threads *threads, struct machine *machine,
+ int pid, int tid)
+{
+ struct thread *th = NULL;
+
+ if (perf_singlethreaded)
+ th = __threads__get_last_match(threads, machine, pid, tid);
+
+ return th;
+}
+
+static void
+__threads__set_last_match(struct threads *threads, struct thread *th)
+{
+ threads->last_match = th;
+}
+
+static void
+threads__set_last_match(struct threads *threads, struct thread *th)
+{
+ if (perf_singlethreaded)
+ __threads__set_last_match(threads, th);
+}
+
+/*
+ * Caller must eventually drop thread->refcnt returned with a successful
+ * lookup/new thread inserted.
+ */
+static struct thread *____machine__findnew_thread(struct machine *machine,
+ struct threads *threads,
+ pid_t pid, pid_t tid,
+ bool create)
+{
+ struct rb_node **p = &threads->entries.rb_node;
+ struct rb_node *parent = NULL;
+ struct thread *th;
+
+ th = threads__get_last_match(threads, machine, pid, tid);
+ if (th)
+ return th;
+
+ while (*p != NULL) {
+ parent = *p;
+ th = rb_entry(parent, struct thread, rb_node);
+
+ if (th->tid == tid) {
+ threads__set_last_match(threads, th);
+ machine__update_thread_pid(machine, th, pid);
+ return thread__get(th);
+ }
+
+ if (tid < th->tid)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ if (!create)
+ return NULL;
+
+ th = thread__new(pid, tid);
+ if (th != NULL) {
+ rb_link_node(&th->rb_node, parent, p);
+ rb_insert_color(&th->rb_node, &threads->entries);
+
+ /*
+ * We have to initialize map_groups separately
+ * after rb tree is updated.
+ *
+ * The reason is that we call machine__findnew_thread
+ * within thread__init_map_groups to find the thread
+ * leader and that would screwed the rb tree.
+ */
+ if (thread__init_map_groups(th, machine)) {
+ rb_erase_init(&th->rb_node, &threads->entries);
+ RB_CLEAR_NODE(&th->rb_node);
+ thread__put(th);
+ return NULL;
+ }
+ /*
+ * It is now in the rbtree, get a ref
+ */
+ thread__get(th);
+ threads__set_last_match(threads, th);
+ ++threads->nr;
+ }
+
+ return th;
+}
+
+struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid)
+{
+ return ____machine__findnew_thread(machine, machine__threads(machine, tid), pid, tid, true);
+}
+
+struct thread *machine__findnew_thread(struct machine *machine, pid_t pid,
+ pid_t tid)
+{
+ struct threads *threads = machine__threads(machine, tid);
+ struct thread *th;
+
+ down_write(&threads->lock);
+ th = __machine__findnew_thread(machine, pid, tid);
+ up_write(&threads->lock);
+ return th;
+}
+
+struct thread *machine__find_thread(struct machine *machine, pid_t pid,
+ pid_t tid)
+{
+ struct threads *threads = machine__threads(machine, tid);
+ struct thread *th;
+
+ down_read(&threads->lock);
+ th = ____machine__findnew_thread(machine, threads, pid, tid, false);
+ up_read(&threads->lock);
+ return th;
+}
+
+struct comm *machine__thread_exec_comm(struct machine *machine,
+ struct thread *thread)
+{
+ if (machine->comm_exec)
+ return thread__exec_comm(thread);
+ else
+ return thread__comm(thread);
+}
+
+int machine__process_comm_event(struct machine *machine, union perf_event *event,
+ struct perf_sample *sample)
+{
+ struct thread *thread = machine__findnew_thread(machine,
+ event->comm.pid,
+ event->comm.tid);
+ bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC;
+ int err = 0;
+
+ if (exec)
+ machine->comm_exec = true;
+
+ if (dump_trace)
+ perf_event__fprintf_comm(event, stdout);
+
+ if (thread == NULL ||
+ __thread__set_comm(thread, event->comm.comm, sample->time, exec)) {
+ dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
+ err = -1;
+ }
+
+ thread__put(thread);
+
+ return err;
+}
+
+int machine__process_namespaces_event(struct machine *machine __maybe_unused,
+ union perf_event *event,
+ struct perf_sample *sample __maybe_unused)
+{
+ struct thread *thread = machine__findnew_thread(machine,
+ event->namespaces.pid,
+ event->namespaces.tid);
+ int err = 0;
+
+ WARN_ONCE(event->namespaces.nr_namespaces > NR_NAMESPACES,
+ "\nWARNING: kernel seems to support more namespaces than perf"
+ " tool.\nTry updating the perf tool..\n\n");
+
+ WARN_ONCE(event->namespaces.nr_namespaces < NR_NAMESPACES,
+ "\nWARNING: perf tool seems to support more namespaces than"
+ " the kernel.\nTry updating the kernel..\n\n");
+
+ if (dump_trace)
+ perf_event__fprintf_namespaces(event, stdout);
+
+ if (thread == NULL ||
+ thread__set_namespaces(thread, sample->time, &event->namespaces)) {
+ dump_printf("problem processing PERF_RECORD_NAMESPACES, skipping event.\n");
+ err = -1;
+ }
+
+ thread__put(thread);
+
+ return err;
+}
+
+int machine__process_lost_event(struct machine *machine __maybe_unused,
+ union perf_event *event, struct perf_sample *sample __maybe_unused)
+{
+ dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
+ event->lost.id, event->lost.lost);
+ return 0;
+}
+
+int machine__process_lost_samples_event(struct machine *machine __maybe_unused,
+ union perf_event *event, struct perf_sample *sample)
+{
+ dump_printf(": id:%" PRIu64 ": lost samples :%" PRIu64 "\n",
+ sample->id, event->lost_samples.lost);
+ return 0;
+}
+
+static struct dso *machine__findnew_module_dso(struct machine *machine,
+ struct kmod_path *m,
+ const char *filename)
+{
+ struct dso *dso;
+
+ down_write(&machine->dsos.lock);
+
+ dso = __dsos__find(&machine->dsos, m->name, true);
+ if (!dso) {
+ dso = __dsos__addnew(&machine->dsos, m->name);
+ if (dso == NULL)
+ goto out_unlock;
+
+ dso__set_module_info(dso, m, machine);
+ dso__set_long_name(dso, strdup(filename), true);
+ }
+
+ dso__get(dso);
+out_unlock:
+ up_write(&machine->dsos.lock);
+ return dso;
+}
+
+int machine__process_aux_event(struct machine *machine __maybe_unused,
+ union perf_event *event)
+{
+ if (dump_trace)
+ perf_event__fprintf_aux(event, stdout);
+ return 0;
+}
+
+int machine__process_itrace_start_event(struct machine *machine __maybe_unused,
+ union perf_event *event)
+{
+ if (dump_trace)
+ perf_event__fprintf_itrace_start(event, stdout);
+ return 0;
+}
+
+int machine__process_switch_event(struct machine *machine __maybe_unused,
+ union perf_event *event)
+{
+ if (dump_trace)
+ perf_event__fprintf_switch(event, stdout);
+ return 0;
+}
+
+static void dso__adjust_kmod_long_name(struct dso *dso, const char *filename)
+{
+ const char *dup_filename;
+
+ if (!filename || !dso || !dso->long_name)
+ return;
+ if (dso->long_name[0] != '[')
+ return;
+ if (!strchr(filename, '/'))
+ return;
+
+ dup_filename = strdup(filename);
+ if (!dup_filename)
+ return;
+
+ dso__set_long_name(dso, dup_filename, true);
+}
+
+struct map *machine__findnew_module_map(struct machine *machine, u64 start,
+ const char *filename)
+{
+ struct map *map = NULL;
+ struct dso *dso = NULL;
+ struct kmod_path m;
+
+ if (kmod_path__parse_name(&m, filename))
+ return NULL;
+
+ map = map_groups__find_by_name(&machine->kmaps, m.name);
+ if (map) {
+ /*
+ * If the map's dso is an offline module, give dso__load()
+ * a chance to find the file path of that module by fixing
+ * long_name.
+ */
+ dso__adjust_kmod_long_name(map->dso, filename);
+ goto out;
+ }
+
+ dso = machine__findnew_module_dso(machine, &m, filename);
+ if (dso == NULL)
+ goto out;
+
+ map = map__new2(start, dso);
+ if (map == NULL)
+ goto out;
+
+ map_groups__insert(&machine->kmaps, map);
+
+ /* Put the map here because map_groups__insert alread got it */
+ map__put(map);
+out:
+ /* put the dso here, corresponding to machine__findnew_module_dso */
+ dso__put(dso);
+ free(m.name);
+ return map;
+}
+
+size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
+{
+ struct rb_node *nd;
+ size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp);
+
+ for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
+ struct machine *pos = rb_entry(nd, struct machine, rb_node);
+ ret += __dsos__fprintf(&pos->dsos.head, fp);
+ }
+
+ return ret;
+}
+
+size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp,
+ bool (skip)(struct dso *dso, int parm), int parm)
+{
+ return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm);
+}
+
+size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
+ bool (skip)(struct dso *dso, int parm), int parm)
+{
+ struct rb_node *nd;
+ size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm);
+
+ for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
+ struct machine *pos = rb_entry(nd, struct machine, rb_node);
+ ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm);
+ }
+ return ret;
+}
+
+size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp)
+{
+ int i;
+ size_t printed = 0;
+ struct dso *kdso = machine__kernel_map(machine)->dso;
+
+ if (kdso->has_build_id) {
+ char filename[PATH_MAX];
+ if (dso__build_id_filename(kdso, filename, sizeof(filename),
+ false))
+ printed += fprintf(fp, "[0] %s\n", filename);
+ }
+
+ for (i = 0; i < vmlinux_path__nr_entries; ++i)
+ printed += fprintf(fp, "[%d] %s\n",
+ i + kdso->has_build_id, vmlinux_path[i]);
+
+ return printed;
+}
+
+size_t machine__fprintf(struct machine *machine, FILE *fp)
+{
+ struct rb_node *nd;
+ size_t ret;
+ int i;
+
+ for (i = 0; i < THREADS__TABLE_SIZE; i++) {
+ struct threads *threads = &machine->threads[i];
+
+ down_read(&threads->lock);
+
+ ret = fprintf(fp, "Threads: %u\n", threads->nr);
+
+ for (nd = rb_first(&threads->entries); nd; nd = rb_next(nd)) {
+ struct thread *pos = rb_entry(nd, struct thread, rb_node);
+
+ ret += thread__fprintf(pos, fp);
+ }
+
+ up_read(&threads->lock);
+ }
+ return ret;
+}
+
+static struct dso *machine__get_kernel(struct machine *machine)
+{
+ const char *vmlinux_name = machine->mmap_name;
+ struct dso *kernel;
+
+ if (machine__is_host(machine)) {
+ if (symbol_conf.vmlinux_name)
+ vmlinux_name = symbol_conf.vmlinux_name;
+
+ kernel = machine__findnew_kernel(machine, vmlinux_name,
+ "[kernel]", DSO_TYPE_KERNEL);
+ } else {
+ if (symbol_conf.default_guest_vmlinux_name)
+ vmlinux_name = symbol_conf.default_guest_vmlinux_name;
+
+ kernel = machine__findnew_kernel(machine, vmlinux_name,
+ "[guest.kernel]",
+ DSO_TYPE_GUEST_KERNEL);
+ }
+
+ if (kernel != NULL && (!kernel->has_build_id))
+ dso__read_running_kernel_build_id(kernel, machine);
+
+ return kernel;
+}
+
+struct process_args {
+ u64 start;
+};
+
+void machine__get_kallsyms_filename(struct machine *machine, char *buf,
+ size_t bufsz)
+{
+ if (machine__is_default_guest(machine))
+ scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms);
+ else
+ scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir);
+}
+
+const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL};
+
+/* Figure out the start address of kernel map from /proc/kallsyms.
+ * Returns the name of the start symbol in *symbol_name. Pass in NULL as
+ * symbol_name if it's not that important.
+ */
+static int machine__get_running_kernel_start(struct machine *machine,
+ const char **symbol_name, u64 *start)
+{
+ char filename[PATH_MAX];
+ int i, err = -1;
+ const char *name;
+ u64 addr = 0;
+
+ machine__get_kallsyms_filename(machine, filename, PATH_MAX);
+
+ if (symbol__restricted_filename(filename, "/proc/kallsyms"))
+ return 0;
+
+ for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) {
+ err = kallsyms__get_function_start(filename, name, &addr);
+ if (!err)
+ break;
+ }
+
+ if (err)
+ return -1;
+
+ if (symbol_name)
+ *symbol_name = name;
+
+ *start = addr;
+ return 0;
+}
+
+int machine__create_extra_kernel_map(struct machine *machine,
+ struct dso *kernel,
+ struct extra_kernel_map *xm)
+{
+ struct kmap *kmap;
+ struct map *map;
+
+ map = map__new2(xm->start, kernel);
+ if (!map)
+ return -1;
+
+ map->end = xm->end;
+ map->pgoff = xm->pgoff;
+
+ kmap = map__kmap(map);
+
+ kmap->kmaps = &machine->kmaps;
+ strlcpy(kmap->name, xm->name, KMAP_NAME_LEN);
+
+ map_groups__insert(&machine->kmaps, map);
+
+ pr_debug2("Added extra kernel map %s %" PRIx64 "-%" PRIx64 "\n",
+ kmap->name, map->start, map->end);
+
+ map__put(map);
+
+ return 0;
+}
+
+static u64 find_entry_trampoline(struct dso *dso)
+{
+ /* Duplicates are removed so lookup all aliases */
+ const char *syms[] = {
+ "_entry_trampoline",
+ "__entry_trampoline_start",
+ "entry_SYSCALL_64_trampoline",
+ };
+ struct symbol *sym = dso__first_symbol(dso);
+ unsigned int i;
+
+ for (; sym; sym = dso__next_symbol(sym)) {
+ if (sym->binding != STB_GLOBAL)
+ continue;
+ for (i = 0; i < ARRAY_SIZE(syms); i++) {
+ if (!strcmp(sym->name, syms[i]))
+ return sym->start;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * These values can be used for kernels that do not have symbols for the entry
+ * trampolines in kallsyms.
+ */
+#define X86_64_CPU_ENTRY_AREA_PER_CPU 0xfffffe0000000000ULL
+#define X86_64_CPU_ENTRY_AREA_SIZE 0x2c000
+#define X86_64_ENTRY_TRAMPOLINE 0x6000
+
+/* Map x86_64 PTI entry trampolines */
+int machine__map_x86_64_entry_trampolines(struct machine *machine,
+ struct dso *kernel)
+{
+ struct map_groups *kmaps = &machine->kmaps;
+ struct maps *maps = &kmaps->maps;
+ int nr_cpus_avail, cpu;
+ bool found = false;
+ struct map *map;
+ u64 pgoff;
+
+ /*
+ * In the vmlinux case, pgoff is a virtual address which must now be
+ * mapped to a vmlinux offset.
+ */
+ for (map = maps__first(maps); map; map = map__next(map)) {
+ struct kmap *kmap = __map__kmap(map);
+ struct map *dest_map;
+
+ if (!kmap || !is_entry_trampoline(kmap->name))
+ continue;
+
+ dest_map = map_groups__find(kmaps, map->pgoff);
+ if (dest_map != map)
+ map->pgoff = dest_map->map_ip(dest_map, map->pgoff);
+ found = true;
+ }
+ if (found || machine->trampolines_mapped)
+ return 0;
+
+ pgoff = find_entry_trampoline(kernel);
+ if (!pgoff)
+ return 0;
+
+ nr_cpus_avail = machine__nr_cpus_avail(machine);
+
+ /* Add a 1 page map for each CPU's entry trampoline */
+ for (cpu = 0; cpu < nr_cpus_avail; cpu++) {
+ u64 va = X86_64_CPU_ENTRY_AREA_PER_CPU +
+ cpu * X86_64_CPU_ENTRY_AREA_SIZE +
+ X86_64_ENTRY_TRAMPOLINE;
+ struct extra_kernel_map xm = {
+ .start = va,
+ .end = va + page_size,
+ .pgoff = pgoff,
+ };
+
+ strlcpy(xm.name, ENTRY_TRAMPOLINE_NAME, KMAP_NAME_LEN);
+
+ if (machine__create_extra_kernel_map(machine, kernel, &xm) < 0)
+ return -1;
+ }
+
+ machine->trampolines_mapped = nr_cpus_avail;
+
+ return 0;
+}
+
+int __weak machine__create_extra_kernel_maps(struct machine *machine __maybe_unused,
+ struct dso *kernel __maybe_unused)
+{
+ return 0;
+}
+
+static int
+__machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
+{
+ struct kmap *kmap;
+ struct map *map;
+
+ /* In case of renewal the kernel map, destroy previous one */
+ machine__destroy_kernel_maps(machine);
+
+ machine->vmlinux_map = map__new2(0, kernel);
+ if (machine->vmlinux_map == NULL)
+ return -1;
+
+ machine->vmlinux_map->map_ip = machine->vmlinux_map->unmap_ip = identity__map_ip;
+ map = machine__kernel_map(machine);
+ kmap = map__kmap(map);
+ if (!kmap)
+ return -1;
+
+ kmap->kmaps = &machine->kmaps;
+ map_groups__insert(&machine->kmaps, map);
+
+ return 0;
+}
+
+void machine__destroy_kernel_maps(struct machine *machine)
+{
+ struct kmap *kmap;
+ struct map *map = machine__kernel_map(machine);
+
+ if (map == NULL)
+ return;
+
+ kmap = map__kmap(map);
+ map_groups__remove(&machine->kmaps, map);
+ if (kmap && kmap->ref_reloc_sym) {
+ zfree((char **)&kmap->ref_reloc_sym->name);
+ zfree(&kmap->ref_reloc_sym);
+ }
+
+ map__zput(machine->vmlinux_map);
+}
+
+int machines__create_guest_kernel_maps(struct machines *machines)
+{
+ int ret = 0;
+ struct dirent **namelist = NULL;
+ int i, items = 0;
+ char path[PATH_MAX];
+ pid_t pid;
+ char *endp;
+
+ if (symbol_conf.default_guest_vmlinux_name ||
+ symbol_conf.default_guest_modules ||
+ symbol_conf.default_guest_kallsyms) {
+ machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID);
+ }
+
+ if (symbol_conf.guestmount) {
+ items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
+ if (items <= 0)
+ return -ENOENT;
+ for (i = 0; i < items; i++) {
+ if (!isdigit(namelist[i]->d_name[0])) {
+ /* Filter out . and .. */
+ continue;
+ }
+ pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10);
+ if ((*endp != '\0') ||
+ (endp == namelist[i]->d_name) ||
+ (errno == ERANGE)) {
+ pr_debug("invalid directory (%s). Skipping.\n",
+ namelist[i]->d_name);
+ continue;
+ }
+ sprintf(path, "%s/%s/proc/kallsyms",
+ symbol_conf.guestmount,
+ namelist[i]->d_name);
+ ret = access(path, R_OK);
+ if (ret) {
+ pr_debug("Can't access file %s\n", path);
+ goto failure;
+ }
+ machines__create_kernel_maps(machines, pid);
+ }
+failure:
+ free(namelist);
+ }
+
+ return ret;
+}
+
+void machines__destroy_kernel_maps(struct machines *machines)
+{
+ struct rb_node *next = rb_first(&machines->guests);
+
+ machine__destroy_kernel_maps(&machines->host);
+
+ while (next) {
+ struct machine *pos = rb_entry(next, struct machine, rb_node);
+
+ next = rb_next(&pos->rb_node);
+ rb_erase(&pos->rb_node, &machines->guests);
+ machine__delete(pos);
+ }
+}
+
+int machines__create_kernel_maps(struct machines *machines, pid_t pid)
+{
+ struct machine *machine = machines__findnew(machines, pid);
+
+ if (machine == NULL)
+ return -1;
+
+ return machine__create_kernel_maps(machine);
+}
+
+int machine__load_kallsyms(struct machine *machine, const char *filename)
+{
+ struct map *map = machine__kernel_map(machine);
+ int ret = __dso__load_kallsyms(map->dso, filename, map, true);
+
+ if (ret > 0) {
+ dso__set_loaded(map->dso);
+ /*
+ * Since /proc/kallsyms will have multiple sessions for the
+ * kernel, with modules between them, fixup the end of all
+ * sections.
+ */
+ map_groups__fixup_end(&machine->kmaps);
+ }
+
+ return ret;
+}
+
+int machine__load_vmlinux_path(struct machine *machine)
+{
+ struct map *map = machine__kernel_map(machine);
+ int ret = dso__load_vmlinux_path(map->dso, map);
+
+ if (ret > 0)
+ dso__set_loaded(map->dso);
+
+ return ret;
+}
+
+static char *get_kernel_version(const char *root_dir)
+{
+ char version[PATH_MAX];
+ FILE *file;
+ char *name, *tmp;
+ const char *prefix = "Linux version ";
+
+ sprintf(version, "%s/proc/version", root_dir);
+ file = fopen(version, "r");
+ if (!file)
+ return NULL;
+
+ version[0] = '\0';
+ tmp = fgets(version, sizeof(version), file);
+ fclose(file);
+
+ name = strstr(version, prefix);
+ if (!name)
+ return NULL;
+ name += strlen(prefix);
+ tmp = strchr(name, ' ');
+ if (tmp)
+ *tmp = '\0';
+
+ return strdup(name);
+}
+
+static bool is_kmod_dso(struct dso *dso)
+{
+ return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE ||
+ dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE;
+}
+
+static int map_groups__set_module_path(struct map_groups *mg, const char *path,
+ struct kmod_path *m)
+{
+ char *long_name;
+ struct map *map = map_groups__find_by_name(mg, m->name);
+
+ if (map == NULL)
+ return 0;
+
+ long_name = strdup(path);
+ if (long_name == NULL)
+ return -ENOMEM;
+
+ dso__set_long_name(map->dso, long_name, true);
+ dso__kernel_module_get_build_id(map->dso, "");
+
+ /*
+ * Full name could reveal us kmod compression, so
+ * we need to update the symtab_type if needed.
+ */
+ if (m->comp && is_kmod_dso(map->dso)) {
+ map->dso->symtab_type++;
+ map->dso->comp = m->comp;
+ }
+
+ return 0;
+}
+
+static int map_groups__set_modules_path_dir(struct map_groups *mg,
+ const char *dir_name, int depth)
+{
+ struct dirent *dent;
+ DIR *dir = opendir(dir_name);
+ int ret = 0;
+
+ if (!dir) {
+ pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
+ return -1;
+ }
+
+ while ((dent = readdir(dir)) != NULL) {
+ char path[PATH_MAX];
+ struct stat st;
+
+ /*sshfs might return bad dent->d_type, so we have to stat*/
+ snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name);
+ if (stat(path, &st))
+ continue;
+
+ if (S_ISDIR(st.st_mode)) {
+ if (!strcmp(dent->d_name, ".") ||
+ !strcmp(dent->d_name, ".."))
+ continue;
+
+ /* Do not follow top-level source and build symlinks */
+ if (depth == 0) {
+ if (!strcmp(dent->d_name, "source") ||
+ !strcmp(dent->d_name, "build"))
+ continue;
+ }
+
+ ret = map_groups__set_modules_path_dir(mg, path,
+ depth + 1);
+ if (ret < 0)
+ goto out;
+ } else {
+ struct kmod_path m;
+
+ ret = kmod_path__parse_name(&m, dent->d_name);
+ if (ret)
+ goto out;
+
+ if (m.kmod)
+ ret = map_groups__set_module_path(mg, path, &m);
+
+ free(m.name);
+
+ if (ret)
+ goto out;
+ }
+ }
+
+out:
+ closedir(dir);
+ return ret;
+}
+
+static int machine__set_modules_path(struct machine *machine)
+{
+ char *version;
+ char modules_path[PATH_MAX];
+
+ version = get_kernel_version(machine->root_dir);
+ if (!version)
+ return -1;
+
+ snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s",
+ machine->root_dir, version);
+ free(version);
+
+ return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0);
+}
+int __weak arch__fix_module_text_start(u64 *start __maybe_unused,
+ const char *name __maybe_unused)
+{
+ return 0;
+}
+
+static int machine__create_module(void *arg, const char *name, u64 start,
+ u64 size)
+{
+ struct machine *machine = arg;
+ struct map *map;
+
+ if (arch__fix_module_text_start(&start, name) < 0)
+ return -1;
+
+ map = machine__findnew_module_map(machine, start, name);
+ if (map == NULL)
+ return -1;
+ map->end = start + size;
+
+ dso__kernel_module_get_build_id(map->dso, machine->root_dir);
+
+ return 0;
+}
+
+static int machine__create_modules(struct machine *machine)
+{
+ const char *modules;
+ char path[PATH_MAX];
+
+ if (machine__is_default_guest(machine)) {
+ modules = symbol_conf.default_guest_modules;
+ } else {
+ snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir);
+ modules = path;
+ }
+
+ if (symbol__restricted_filename(modules, "/proc/modules"))
+ return -1;
+
+ if (modules__parse(modules, machine, machine__create_module))
+ return -1;
+
+ if (!machine__set_modules_path(machine))
+ return 0;
+
+ pr_debug("Problems setting modules path maps, continuing anyway...\n");
+
+ return 0;
+}
+
+static void machine__set_kernel_mmap(struct machine *machine,
+ u64 start, u64 end)
+{
+ machine->vmlinux_map->start = start;
+ machine->vmlinux_map->end = end;
+ /*
+ * Be a bit paranoid here, some perf.data file came with
+ * a zero sized synthesized MMAP event for the kernel.
+ */
+ if (start == 0 && end == 0)
+ machine->vmlinux_map->end = ~0ULL;
+}
+
+int machine__create_kernel_maps(struct machine *machine)
+{
+ struct dso *kernel = machine__get_kernel(machine);
+ const char *name = NULL;
+ struct map *map;
+ u64 addr = 0;
+ int ret;
+
+ if (kernel == NULL)
+ return -1;
+
+ ret = __machine__create_kernel_maps(machine, kernel);
+ if (ret < 0)
+ goto out_put;
+
+ if (symbol_conf.use_modules && machine__create_modules(machine) < 0) {
+ if (machine__is_host(machine))
+ pr_debug("Problems creating module maps, "
+ "continuing anyway...\n");
+ else
+ pr_debug("Problems creating module maps for guest %d, "
+ "continuing anyway...\n", machine->pid);
+ }
+
+ if (!machine__get_running_kernel_start(machine, &name, &addr)) {
+ if (name &&
+ map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map, name, addr)) {
+ machine__destroy_kernel_maps(machine);
+ ret = -1;
+ goto out_put;
+ }
+
+ /* we have a real start address now, so re-order the kmaps */
+ map = machine__kernel_map(machine);
+
+ map__get(map);
+ map_groups__remove(&machine->kmaps, map);
+
+ /* assume it's the last in the kmaps */
+ machine__set_kernel_mmap(machine, addr, ~0ULL);
+
+ map_groups__insert(&machine->kmaps, map);
+ map__put(map);
+ }
+
+ if (machine__create_extra_kernel_maps(machine, kernel))
+ pr_debug("Problems creating extra kernel maps, continuing anyway...\n");
+
+ /* update end address of the kernel map using adjacent module address */
+ map = map__next(machine__kernel_map(machine));
+ if (map)
+ machine__set_kernel_mmap(machine, addr, map->start);
+out_put:
+ dso__put(kernel);
+ return ret;
+}
+
+static bool machine__uses_kcore(struct machine *machine)
+{
+ struct dso *dso;
+
+ list_for_each_entry(dso, &machine->dsos.head, node) {
+ if (dso__is_kcore(dso))
+ return true;
+ }
+
+ return false;
+}
+
+static bool perf_event__is_extra_kernel_mmap(struct machine *machine,
+ union perf_event *event)
+{
+ return machine__is(machine, "x86_64") &&
+ is_entry_trampoline(event->mmap.filename);
+}
+
+static int machine__process_extra_kernel_map(struct machine *machine,
+ union perf_event *event)
+{
+ struct map *kernel_map = machine__kernel_map(machine);
+ struct dso *kernel = kernel_map ? kernel_map->dso : NULL;
+ struct extra_kernel_map xm = {
+ .start = event->mmap.start,
+ .end = event->mmap.start + event->mmap.len,
+ .pgoff = event->mmap.pgoff,
+ };
+
+ if (kernel == NULL)
+ return -1;
+
+ strlcpy(xm.name, event->mmap.filename, KMAP_NAME_LEN);
+
+ return machine__create_extra_kernel_map(machine, kernel, &xm);
+}
+
+static int machine__process_kernel_mmap_event(struct machine *machine,
+ union perf_event *event)
+{
+ struct map *map;
+ enum dso_kernel_type kernel_type;
+ bool is_kernel_mmap;
+
+ /* If we have maps from kcore then we do not need or want any others */
+ if (machine__uses_kcore(machine))
+ return 0;
+
+ if (machine__is_host(machine))
+ kernel_type = DSO_TYPE_KERNEL;
+ else
+ kernel_type = DSO_TYPE_GUEST_KERNEL;
+
+ is_kernel_mmap = memcmp(event->mmap.filename,
+ machine->mmap_name,
+ strlen(machine->mmap_name) - 1) == 0;
+ if (event->mmap.filename[0] == '/' ||
+ (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
+ map = machine__findnew_module_map(machine, event->mmap.start,
+ event->mmap.filename);
+ if (map == NULL)
+ goto out_problem;
+
+ map->end = map->start + event->mmap.len;
+ } else if (is_kernel_mmap) {
+ const char *symbol_name = (event->mmap.filename +
+ strlen(machine->mmap_name));
+ /*
+ * Should be there already, from the build-id table in
+ * the header.
+ */
+ struct dso *kernel = NULL;
+ struct dso *dso;
+
+ down_read(&machine->dsos.lock);
+
+ list_for_each_entry(dso, &machine->dsos.head, node) {
+
+ /*
+ * The cpumode passed to is_kernel_module is not the
+ * cpumode of *this* event. If we insist on passing
+ * correct cpumode to is_kernel_module, we should
+ * record the cpumode when we adding this dso to the
+ * linked list.
+ *
+ * However we don't really need passing correct
+ * cpumode. We know the correct cpumode must be kernel
+ * mode (if not, we should not link it onto kernel_dsos
+ * list).
+ *
+ * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN.
+ * is_kernel_module() treats it as a kernel cpumode.
+ */
+
+ if (!dso->kernel ||
+ is_kernel_module(dso->long_name,
+ PERF_RECORD_MISC_CPUMODE_UNKNOWN))
+ continue;
+
+
+ kernel = dso;
+ break;
+ }
+
+ up_read(&machine->dsos.lock);
+
+ if (kernel == NULL)
+ kernel = machine__findnew_dso(machine, machine->mmap_name);
+ if (kernel == NULL)
+ goto out_problem;
+
+ kernel->kernel = kernel_type;
+ if (__machine__create_kernel_maps(machine, kernel) < 0) {
+ dso__put(kernel);
+ goto out_problem;
+ }
+
+ if (strstr(kernel->long_name, "vmlinux"))
+ dso__set_short_name(kernel, "[kernel.vmlinux]", false);
+
+ machine__set_kernel_mmap(machine, event->mmap.start,
+ event->mmap.start + event->mmap.len);
+
+ /*
+ * 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) {
+ map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map,
+ symbol_name,
+ event->mmap.pgoff);
+ }
+
+ if (machine__is_default_guest(machine)) {
+ /*
+ * preload dso of guest kernel and modules
+ */
+ dso__load(kernel, machine__kernel_map(machine));
+ }
+ } else if (perf_event__is_extra_kernel_mmap(machine, event)) {
+ return machine__process_extra_kernel_map(machine, event);
+ }
+ return 0;
+out_problem:
+ return -1;
+}
+
+int machine__process_mmap2_event(struct machine *machine,
+ union perf_event *event,
+ struct perf_sample *sample)
+{
+ struct thread *thread;
+ struct map *map;
+ int ret = 0;
+
+ if (dump_trace)
+ perf_event__fprintf_mmap2(event, stdout);
+
+ if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
+ sample->cpumode == PERF_RECORD_MISC_KERNEL) {
+ ret = machine__process_kernel_mmap_event(machine, event);
+ if (ret < 0)
+ goto out_problem;
+ return 0;
+ }
+
+ thread = machine__findnew_thread(machine, event->mmap2.pid,
+ event->mmap2.tid);
+ if (thread == NULL)
+ goto out_problem;
+
+ map = map__new(machine, event->mmap2.start,
+ event->mmap2.len, event->mmap2.pgoff,
+ event->mmap2.maj,
+ event->mmap2.min, event->mmap2.ino,
+ event->mmap2.ino_generation,
+ event->mmap2.prot,
+ event->mmap2.flags,
+ event->mmap2.filename, thread);
+
+ if (map == NULL)
+ goto out_problem_map;
+
+ ret = thread__insert_map(thread, map);
+ if (ret)
+ goto out_problem_insert;
+
+ thread__put(thread);
+ map__put(map);
+ return 0;
+
+out_problem_insert:
+ map__put(map);
+out_problem_map:
+ thread__put(thread);
+out_problem:
+ dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n");
+ return 0;
+}
+
+int machine__process_mmap_event(struct machine *machine, union perf_event *event,
+ struct perf_sample *sample)
+{
+ struct thread *thread;
+ struct map *map;
+ u32 prot = 0;
+ int ret = 0;
+
+ if (dump_trace)
+ perf_event__fprintf_mmap(event, stdout);
+
+ if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
+ sample->cpumode == PERF_RECORD_MISC_KERNEL) {
+ ret = machine__process_kernel_mmap_event(machine, event);
+ if (ret < 0)
+ goto out_problem;
+ return 0;
+ }
+
+ thread = machine__findnew_thread(machine, event->mmap.pid,
+ event->mmap.tid);
+ if (thread == NULL)
+ goto out_problem;
+
+ if (!(event->header.misc & PERF_RECORD_MISC_MMAP_DATA))
+ prot = PROT_EXEC;
+
+ map = map__new(machine, event->mmap.start,
+ event->mmap.len, event->mmap.pgoff,
+ 0, 0, 0, 0, prot, 0,
+ event->mmap.filename,
+ thread);
+
+ if (map == NULL)
+ goto out_problem_map;
+
+ ret = thread__insert_map(thread, map);
+ if (ret)
+ goto out_problem_insert;
+
+ thread__put(thread);
+ map__put(map);
+ return 0;
+
+out_problem_insert:
+ map__put(map);
+out_problem_map:
+ thread__put(thread);
+out_problem:
+ dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
+ return 0;
+}
+
+static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock)
+{
+ struct threads *threads = machine__threads(machine, th->tid);
+
+ if (threads->last_match == th)
+ threads__set_last_match(threads, NULL);
+
+ BUG_ON(refcount_read(&th->refcnt) == 0);
+ if (lock)
+ down_write(&threads->lock);
+ rb_erase_init(&th->rb_node, &threads->entries);
+ RB_CLEAR_NODE(&th->rb_node);
+ --threads->nr;
+ /*
+ * Move it first to the dead_threads list, then drop the reference,
+ * if this is the last reference, then the thread__delete destructor
+ * will be called and we will remove it from the dead_threads list.
+ */
+ list_add_tail(&th->node, &threads->dead);
+ if (lock)
+ up_write(&threads->lock);
+ thread__put(th);
+}
+
+void machine__remove_thread(struct machine *machine, struct thread *th)
+{
+ return __machine__remove_thread(machine, th, true);
+}
+
+int machine__process_fork_event(struct machine *machine, union perf_event *event,
+ struct perf_sample *sample)
+{
+ struct thread *thread = machine__find_thread(machine,
+ event->fork.pid,
+ event->fork.tid);
+ struct thread *parent = machine__findnew_thread(machine,
+ event->fork.ppid,
+ event->fork.ptid);
+ int err = 0;
+
+ if (dump_trace)
+ perf_event__fprintf_task(event, stdout);
+
+ /*
+ * There may be an existing thread that is not actually the parent,
+ * either because we are processing events out of order, or because the
+ * (fork) event that would have removed the thread was lost. Assume the
+ * latter case and continue on as best we can.
+ */
+ if (parent->pid_ != (pid_t)event->fork.ppid) {
+ dump_printf("removing erroneous parent thread %d/%d\n",
+ parent->pid_, parent->tid);
+ machine__remove_thread(machine, parent);
+ thread__put(parent);
+ parent = machine__findnew_thread(machine, event->fork.ppid,
+ event->fork.ptid);
+ }
+
+ /* if a thread currently exists for the thread id remove it */
+ if (thread != NULL) {
+ machine__remove_thread(machine, thread);
+ thread__put(thread);
+ }
+
+ thread = machine__findnew_thread(machine, event->fork.pid,
+ event->fork.tid);
+
+ if (thread == NULL || parent == NULL ||
+ thread__fork(thread, parent, sample->time) < 0) {
+ dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
+ err = -1;
+ }
+ thread__put(thread);
+ thread__put(parent);
+
+ return err;
+}
+
+int machine__process_exit_event(struct machine *machine, union perf_event *event,
+ struct perf_sample *sample __maybe_unused)
+{
+ struct thread *thread = machine__find_thread(machine,
+ event->fork.pid,
+ event->fork.tid);
+
+ if (dump_trace)
+ perf_event__fprintf_task(event, stdout);
+
+ if (thread != NULL) {
+ thread__exited(thread);
+ thread__put(thread);
+ }
+
+ return 0;
+}
+
+int machine__process_event(struct machine *machine, union perf_event *event,
+ struct perf_sample *sample)
+{
+ int ret;
+
+ switch (event->header.type) {
+ case PERF_RECORD_COMM:
+ ret = machine__process_comm_event(machine, event, sample); break;
+ case PERF_RECORD_MMAP:
+ ret = machine__process_mmap_event(machine, event, sample); break;
+ case PERF_RECORD_NAMESPACES:
+ ret = machine__process_namespaces_event(machine, event, sample); break;
+ case PERF_RECORD_MMAP2:
+ ret = machine__process_mmap2_event(machine, event, sample); break;
+ case PERF_RECORD_FORK:
+ ret = machine__process_fork_event(machine, event, sample); break;
+ case PERF_RECORD_EXIT:
+ ret = machine__process_exit_event(machine, event, sample); break;
+ case PERF_RECORD_LOST:
+ ret = machine__process_lost_event(machine, event, sample); break;
+ case PERF_RECORD_AUX:
+ ret = machine__process_aux_event(machine, event); break;
+ case PERF_RECORD_ITRACE_START:
+ ret = machine__process_itrace_start_event(machine, event); break;
+ case PERF_RECORD_LOST_SAMPLES:
+ ret = machine__process_lost_samples_event(machine, event, sample); break;
+ case PERF_RECORD_SWITCH:
+ case PERF_RECORD_SWITCH_CPU_WIDE:
+ ret = machine__process_switch_event(machine, event); break;
+ default:
+ ret = -1;
+ break;
+ }
+
+ return ret;
+}
+
+static bool symbol__match_regex(struct symbol *sym, regex_t *regex)
+{
+ if (!regexec(regex, sym->name, 0, NULL, 0))
+ return 1;
+ return 0;
+}
+
+static void ip__resolve_ams(struct thread *thread,
+ struct addr_map_symbol *ams,
+ u64 ip)
+{
+ struct addr_location al;
+
+ memset(&al, 0, sizeof(al));
+ /*
+ * We cannot use the header.misc hint to determine whether a
+ * branch stack address is user, kernel, guest, hypervisor.
+ * Branches may straddle the kernel/user/hypervisor boundaries.
+ * Thus, we have to try consecutively until we find a match
+ * or else, the symbol is unknown
+ */
+ thread__find_cpumode_addr_location(thread, ip, &al);
+
+ ams->addr = ip;
+ ams->al_addr = al.addr;
+ ams->sym = al.sym;
+ ams->map = al.map;
+ ams->phys_addr = 0;
+}
+
+static void ip__resolve_data(struct thread *thread,
+ u8 m, struct addr_map_symbol *ams,
+ u64 addr, u64 phys_addr)
+{
+ struct addr_location al;
+
+ memset(&al, 0, sizeof(al));
+
+ thread__find_symbol(thread, m, addr, &al);
+
+ ams->addr = addr;
+ ams->al_addr = al.addr;
+ ams->sym = al.sym;
+ ams->map = al.map;
+ ams->phys_addr = phys_addr;
+}
+
+struct mem_info *sample__resolve_mem(struct perf_sample *sample,
+ struct addr_location *al)
+{
+ struct mem_info *mi = mem_info__new();
+
+ if (!mi)
+ return NULL;
+
+ ip__resolve_ams(al->thread, &mi->iaddr, sample->ip);
+ ip__resolve_data(al->thread, al->cpumode, &mi->daddr,
+ sample->addr, sample->phys_addr);
+ mi->data_src.val = sample->data_src;
+
+ return mi;
+}
+
+static char *callchain_srcline(struct map *map, struct symbol *sym, u64 ip)
+{
+ char *srcline = NULL;
+
+ if (!map || callchain_param.key == CCKEY_FUNCTION)
+ return srcline;
+
+ srcline = srcline__tree_find(&map->dso->srclines, ip);
+ if (!srcline) {
+ bool show_sym = false;
+ bool show_addr = callchain_param.key == CCKEY_ADDRESS;
+
+ srcline = get_srcline(map->dso, map__rip_2objdump(map, ip),
+ sym, show_sym, show_addr, ip);
+ srcline__tree_insert(&map->dso->srclines, ip, srcline);
+ }
+
+ return srcline;
+}
+
+struct iterations {
+ int nr_loop_iter;
+ u64 cycles;
+};
+
+static int add_callchain_ip(struct thread *thread,
+ struct callchain_cursor *cursor,
+ struct symbol **parent,
+ struct addr_location *root_al,
+ u8 *cpumode,
+ u64 ip,
+ bool branch,
+ struct branch_flags *flags,
+ struct iterations *iter,
+ u64 branch_from)
+{
+ struct addr_location al;
+ int nr_loop_iter = 0;
+ u64 iter_cycles = 0;
+ const char *srcline = NULL;
+
+ al.filtered = 0;
+ al.sym = NULL;
+ if (!cpumode) {
+ thread__find_cpumode_addr_location(thread, ip, &al);
+ } else {
+ if (ip >= PERF_CONTEXT_MAX) {
+ switch (ip) {
+ case PERF_CONTEXT_HV:
+ *cpumode = PERF_RECORD_MISC_HYPERVISOR;
+ break;
+ case PERF_CONTEXT_KERNEL:
+ *cpumode = PERF_RECORD_MISC_KERNEL;
+ break;
+ case PERF_CONTEXT_USER:
+ *cpumode = PERF_RECORD_MISC_USER;
+ break;
+ default:
+ pr_debug("invalid callchain context: "
+ "%"PRId64"\n", (s64) ip);
+ /*
+ * It seems the callchain is corrupted.
+ * Discard all.
+ */
+ callchain_cursor_reset(cursor);
+ return 1;
+ }
+ return 0;
+ }
+ thread__find_symbol(thread, *cpumode, ip, &al);
+ }
+
+ if (al.sym != NULL) {
+ if (perf_hpp_list.parent && !*parent &&
+ symbol__match_regex(al.sym, &parent_regex))
+ *parent = al.sym;
+ else if (have_ignore_callees && root_al &&
+ symbol__match_regex(al.sym, &ignore_callees_regex)) {
+ /* Treat this symbol as the root,
+ forgetting its callees. */
+ *root_al = al;
+ callchain_cursor_reset(cursor);
+ }
+ }
+
+ if (symbol_conf.hide_unresolved && al.sym == NULL)
+ return 0;
+
+ if (iter) {
+ nr_loop_iter = iter->nr_loop_iter;
+ iter_cycles = iter->cycles;
+ }
+
+ srcline = callchain_srcline(al.map, al.sym, al.addr);
+ return callchain_cursor_append(cursor, ip, al.map, al.sym,
+ branch, flags, nr_loop_iter,
+ iter_cycles, branch_from, srcline);
+}
+
+struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
+ struct addr_location *al)
+{
+ unsigned int i;
+ const struct branch_stack *bs = sample->branch_stack;
+ struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info));
+
+ if (!bi)
+ return NULL;
+
+ for (i = 0; i < bs->nr; i++) {
+ ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to);
+ ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from);
+ bi[i].flags = bs->entries[i].flags;
+ }
+ return bi;
+}
+
+static void save_iterations(struct iterations *iter,
+ struct branch_entry *be, int nr)
+{
+ int i;
+
+ iter->nr_loop_iter = nr;
+ iter->cycles = 0;
+
+ for (i = 0; i < nr; i++)
+ iter->cycles += be[i].flags.cycles;
+}
+
+#define CHASHSZ 127
+#define CHASHBITS 7
+#define NO_ENTRY 0xff
+
+#define PERF_MAX_BRANCH_DEPTH 127
+
+/* Remove loops. */
+static int remove_loops(struct branch_entry *l, int nr,
+ struct iterations *iter)
+{
+ int i, j, off;
+ unsigned char chash[CHASHSZ];
+
+ memset(chash, NO_ENTRY, sizeof(chash));
+
+ BUG_ON(PERF_MAX_BRANCH_DEPTH > 255);
+
+ for (i = 0; i < nr; i++) {
+ int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ;
+
+ /* no collision handling for now */
+ if (chash[h] == NO_ENTRY) {
+ chash[h] = i;
+ } else if (l[chash[h]].from == l[i].from) {
+ bool is_loop = true;
+ /* check if it is a real loop */
+ off = 0;
+ for (j = chash[h]; j < i && i + off < nr; j++, off++)
+ if (l[j].from != l[i + off].from) {
+ is_loop = false;
+ break;
+ }
+ if (is_loop) {
+ j = nr - (i + off);
+ if (j > 0) {
+ save_iterations(iter + i + off,
+ l + i, off);
+
+ memmove(iter + i, iter + i + off,
+ j * sizeof(*iter));
+
+ memmove(l + i, l + i + off,
+ j * sizeof(*l));
+ }
+
+ nr -= off;
+ }
+ }
+ }
+ return nr;
+}
+
+/*
+ * Recolve LBR callstack chain sample
+ * Return:
+ * 1 on success get LBR callchain information
+ * 0 no available LBR callchain information, should try fp
+ * negative error code on other errors.
+ */
+static int resolve_lbr_callchain_sample(struct thread *thread,
+ struct callchain_cursor *cursor,
+ struct perf_sample *sample,
+ struct symbol **parent,
+ struct addr_location *root_al,
+ int max_stack)
+{
+ struct ip_callchain *chain = sample->callchain;
+ int chain_nr = min(max_stack, (int)chain->nr), i;
+ u8 cpumode = PERF_RECORD_MISC_USER;
+ u64 ip, branch_from = 0;
+
+ for (i = 0; i < chain_nr; i++) {
+ if (chain->ips[i] == PERF_CONTEXT_USER)
+ break;
+ }
+
+ /* LBR only affects the user callchain */
+ if (i != chain_nr) {
+ struct branch_stack *lbr_stack = sample->branch_stack;
+ int lbr_nr = lbr_stack->nr, j, k;
+ bool branch;
+ struct branch_flags *flags;
+ /*
+ * LBR callstack can only get user call chain.
+ * The mix_chain_nr is kernel call chain
+ * number plus LBR user call chain number.
+ * i is kernel call chain number,
+ * 1 is PERF_CONTEXT_USER,
+ * lbr_nr + 1 is the user call chain number.
+ * For details, please refer to the comments
+ * in callchain__printf
+ */
+ int mix_chain_nr = i + 1 + lbr_nr + 1;
+
+ for (j = 0; j < mix_chain_nr; j++) {
+ int err;
+ branch = false;
+ flags = NULL;
+
+ if (callchain_param.order == ORDER_CALLEE) {
+ if (j < i + 1)
+ ip = chain->ips[j];
+ else if (j > i + 1) {
+ k = j - i - 2;
+ ip = lbr_stack->entries[k].from;
+ branch = true;
+ flags = &lbr_stack->entries[k].flags;
+ } else {
+ ip = lbr_stack->entries[0].to;
+ branch = true;
+ flags = &lbr_stack->entries[0].flags;
+ branch_from =
+ lbr_stack->entries[0].from;
+ }
+ } else {
+ if (j < lbr_nr) {
+ k = lbr_nr - j - 1;
+ ip = lbr_stack->entries[k].from;
+ branch = true;
+ flags = &lbr_stack->entries[k].flags;
+ }
+ else if (j > lbr_nr)
+ ip = chain->ips[i + 1 - (j - lbr_nr)];
+ else {
+ ip = lbr_stack->entries[0].to;
+ branch = true;
+ flags = &lbr_stack->entries[0].flags;
+ branch_from =
+ lbr_stack->entries[0].from;
+ }
+ }
+
+ err = add_callchain_ip(thread, cursor, parent,
+ root_al, &cpumode, ip,
+ branch, flags, NULL,
+ branch_from);
+ if (err)
+ return (err < 0) ? err : 0;
+ }
+ return 1;
+ }
+
+ return 0;
+}
+
+static int find_prev_cpumode(struct ip_callchain *chain, struct thread *thread,
+ struct callchain_cursor *cursor,
+ struct symbol **parent,
+ struct addr_location *root_al,
+ u8 *cpumode, int ent)
+{
+ int err = 0;
+
+ while (--ent >= 0) {
+ u64 ip = chain->ips[ent];
+
+ if (ip >= PERF_CONTEXT_MAX) {
+ err = add_callchain_ip(thread, cursor, parent,
+ root_al, cpumode, ip,
+ false, NULL, NULL, 0);
+ break;
+ }
+ }
+ return err;
+}
+
+static int thread__resolve_callchain_sample(struct thread *thread,
+ struct callchain_cursor *cursor,
+ struct perf_evsel *evsel,
+ struct perf_sample *sample,
+ struct symbol **parent,
+ struct addr_location *root_al,
+ int max_stack)
+{
+ struct branch_stack *branch = sample->branch_stack;
+ struct ip_callchain *chain = sample->callchain;
+ int chain_nr = 0;
+ u8 cpumode = PERF_RECORD_MISC_USER;
+ int i, j, err, nr_entries;
+ int skip_idx = -1;
+ int first_call = 0;
+
+ if (chain)
+ chain_nr = chain->nr;
+
+ if (perf_evsel__has_branch_callstack(evsel)) {
+ err = resolve_lbr_callchain_sample(thread, cursor, sample, parent,
+ root_al, max_stack);
+ if (err)
+ return (err < 0) ? err : 0;
+ }
+
+ /*
+ * Based on DWARF debug information, some architectures skip
+ * a callchain entry saved by the kernel.
+ */
+ skip_idx = arch_skip_callchain_idx(thread, chain);
+
+ /*
+ * Add branches to call stack for easier browsing. This gives
+ * more context for a sample than just the callers.
+ *
+ * This uses individual histograms of paths compared to the
+ * aggregated histograms the normal LBR mode uses.
+ *
+ * Limitations for now:
+ * - No extra filters
+ * - No annotations (should annotate somehow)
+ */
+
+ if (branch && callchain_param.branch_callstack) {
+ int nr = min(max_stack, (int)branch->nr);
+ struct branch_entry be[nr];
+ struct iterations iter[nr];
+
+ if (branch->nr > PERF_MAX_BRANCH_DEPTH) {
+ pr_warning("corrupted branch chain. skipping...\n");
+ goto check_calls;
+ }
+
+ for (i = 0; i < nr; i++) {
+ if (callchain_param.order == ORDER_CALLEE) {
+ be[i] = branch->entries[i];
+
+ if (chain == NULL)
+ continue;
+
+ /*
+ * Check for overlap into the callchain.
+ * The return address is one off compared to
+ * the branch entry. To adjust for this
+ * assume the calling instruction is not longer
+ * than 8 bytes.
+ */
+ if (i == skip_idx ||
+ chain->ips[first_call] >= PERF_CONTEXT_MAX)
+ first_call++;
+ else if (be[i].from < chain->ips[first_call] &&
+ be[i].from >= chain->ips[first_call] - 8)
+ first_call++;
+ } else
+ be[i] = branch->entries[branch->nr - i - 1];
+ }
+
+ memset(iter, 0, sizeof(struct iterations) * nr);
+ nr = remove_loops(be, nr, iter);
+
+ for (i = 0; i < nr; i++) {
+ err = add_callchain_ip(thread, cursor, parent,
+ root_al,
+ NULL, be[i].to,
+ true, &be[i].flags,
+ NULL, be[i].from);
+
+ if (!err)
+ err = add_callchain_ip(thread, cursor, parent, root_al,
+ NULL, be[i].from,
+ true, &be[i].flags,
+ &iter[i], 0);
+ if (err == -EINVAL)
+ break;
+ if (err)
+ return err;
+ }
+
+ if (chain_nr == 0)
+ return 0;
+
+ chain_nr -= nr;
+ }
+
+check_calls:
+ if (callchain_param.order != ORDER_CALLEE) {
+ err = find_prev_cpumode(chain, thread, cursor, parent, root_al,
+ &cpumode, chain->nr - first_call);
+ if (err)
+ return (err < 0) ? err : 0;
+ }
+ for (i = first_call, nr_entries = 0;
+ i < chain_nr && nr_entries < max_stack; i++) {
+ u64 ip;
+
+ if (callchain_param.order == ORDER_CALLEE)
+ j = i;
+ else
+ j = chain->nr - i - 1;
+
+#ifdef HAVE_SKIP_CALLCHAIN_IDX
+ if (j == skip_idx)
+ continue;
+#endif
+ ip = chain->ips[j];
+ if (ip < PERF_CONTEXT_MAX)
+ ++nr_entries;
+ else if (callchain_param.order != ORDER_CALLEE) {
+ err = find_prev_cpumode(chain, thread, cursor, parent,
+ root_al, &cpumode, j);
+ if (err)
+ return (err < 0) ? err : 0;
+ continue;
+ }
+
+ err = add_callchain_ip(thread, cursor, parent,
+ root_al, &cpumode, ip,
+ false, NULL, NULL, 0);
+
+ if (err)
+ return (err < 0) ? err : 0;
+ }
+
+ return 0;
+}
+
+static int append_inlines(struct callchain_cursor *cursor,
+ struct map *map, struct symbol *sym, u64 ip)
+{
+ struct inline_node *inline_node;
+ struct inline_list *ilist;
+ u64 addr;
+ int ret = 1;
+
+ if (!symbol_conf.inline_name || !map || !sym)
+ return ret;
+
+ addr = map__map_ip(map, ip);
+ addr = map__rip_2objdump(map, addr);
+
+ inline_node = inlines__tree_find(&map->dso->inlined_nodes, addr);
+ if (!inline_node) {
+ inline_node = dso__parse_addr_inlines(map->dso, addr, sym);
+ if (!inline_node)
+ return ret;
+ inlines__tree_insert(&map->dso->inlined_nodes, inline_node);
+ }
+
+ list_for_each_entry(ilist, &inline_node->val, list) {
+ ret = callchain_cursor_append(cursor, ip, map,
+ ilist->symbol, false,
+ NULL, 0, 0, 0, ilist->srcline);
+
+ if (ret != 0)
+ return ret;
+ }
+
+ return ret;
+}
+
+static int unwind_entry(struct unwind_entry *entry, void *arg)
+{
+ struct callchain_cursor *cursor = arg;
+ const char *srcline = NULL;
+ u64 addr = entry->ip;
+
+ if (symbol_conf.hide_unresolved && entry->sym == NULL)
+ return 0;
+
+ if (append_inlines(cursor, entry->map, entry->sym, entry->ip) == 0)
+ return 0;
+
+ /*
+ * Convert entry->ip from a virtual address to an offset in
+ * its corresponding binary.
+ */
+ if (entry->map)
+ addr = map__map_ip(entry->map, entry->ip);
+
+ srcline = callchain_srcline(entry->map, entry->sym, addr);
+ return callchain_cursor_append(cursor, entry->ip,
+ entry->map, entry->sym,
+ false, NULL, 0, 0, 0, srcline);
+}
+
+static int thread__resolve_callchain_unwind(struct thread *thread,
+ struct callchain_cursor *cursor,
+ struct perf_evsel *evsel,
+ struct perf_sample *sample,
+ int max_stack)
+{
+ /* Can we do dwarf post unwind? */
+ if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) &&
+ (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER)))
+ return 0;
+
+ /* Bail out if nothing was captured. */
+ if ((!sample->user_regs.regs) ||
+ (!sample->user_stack.size))
+ return 0;
+
+ return unwind__get_entries(unwind_entry, cursor,
+ thread, sample, max_stack);
+}
+
+int thread__resolve_callchain(struct thread *thread,
+ struct callchain_cursor *cursor,
+ struct perf_evsel *evsel,
+ struct perf_sample *sample,
+ struct symbol **parent,
+ struct addr_location *root_al,
+ int max_stack)
+{
+ int ret = 0;
+
+ callchain_cursor_reset(cursor);
+
+ if (callchain_param.order == ORDER_CALLEE) {
+ ret = thread__resolve_callchain_sample(thread, cursor,
+ evsel, sample,
+ parent, root_al,
+ max_stack);
+ if (ret)
+ return ret;
+ ret = thread__resolve_callchain_unwind(thread, cursor,
+ evsel, sample,
+ max_stack);
+ } else {
+ ret = thread__resolve_callchain_unwind(thread, cursor,
+ evsel, sample,
+ max_stack);
+ if (ret)
+ return ret;
+ ret = thread__resolve_callchain_sample(thread, cursor,
+ evsel, sample,
+ parent, root_al,
+ max_stack);
+ }
+
+ return ret;
+}
+
+int machine__for_each_thread(struct machine *machine,
+ int (*fn)(struct thread *thread, void *p),
+ void *priv)
+{
+ struct threads *threads;
+ struct rb_node *nd;
+ struct thread *thread;
+ int rc = 0;
+ int i;
+
+ for (i = 0; i < THREADS__TABLE_SIZE; i++) {
+ threads = &machine->threads[i];
+ for (nd = rb_first(&threads->entries); nd; nd = rb_next(nd)) {
+ thread = rb_entry(nd, struct thread, rb_node);
+ rc = fn(thread, priv);
+ if (rc != 0)
+ return rc;
+ }
+
+ list_for_each_entry(thread, &threads->dead, node) {
+ rc = fn(thread, priv);
+ if (rc != 0)
+ return rc;
+ }
+ }
+ return rc;
+}
+
+int machines__for_each_thread(struct machines *machines,
+ int (*fn)(struct thread *thread, void *p),
+ void *priv)
+{
+ struct rb_node *nd;
+ int rc = 0;
+
+ rc = machine__for_each_thread(&machines->host, fn, priv);
+ if (rc != 0)
+ return rc;
+
+ for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
+ struct machine *machine = rb_entry(nd, struct machine, rb_node);
+
+ rc = machine__for_each_thread(machine, fn, priv);
+ if (rc != 0)
+ return rc;
+ }
+ return rc;
+}
+
+int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
+ struct target *target, struct thread_map *threads,
+ perf_event__handler_t process, bool data_mmap,
+ unsigned int proc_map_timeout,
+ unsigned int nr_threads_synthesize)
+{
+ if (target__has_task(target))
+ return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap, proc_map_timeout);
+ else if (target__has_cpu(target))
+ return perf_event__synthesize_threads(tool, process,
+ machine, data_mmap,
+ proc_map_timeout,
+ nr_threads_synthesize);
+ /* command specified */
+ return 0;
+}
+
+pid_t machine__get_current_tid(struct machine *machine, int cpu)
+{
+ if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid)
+ return -1;
+
+ return machine->current_tid[cpu];
+}
+
+int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid,
+ pid_t tid)
+{
+ struct thread *thread;
+
+ if (cpu < 0)
+ return -EINVAL;
+
+ if (!machine->current_tid) {
+ int i;
+
+ machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t));
+ if (!machine->current_tid)
+ return -ENOMEM;
+ for (i = 0; i < MAX_NR_CPUS; i++)
+ machine->current_tid[i] = -1;
+ }
+
+ if (cpu >= MAX_NR_CPUS) {
+ pr_err("Requested CPU %d too large. ", cpu);
+ pr_err("Consider raising MAX_NR_CPUS\n");
+ return -EINVAL;
+ }
+
+ machine->current_tid[cpu] = tid;
+
+ thread = machine__findnew_thread(machine, pid, tid);
+ if (!thread)
+ return -ENOMEM;
+
+ thread->cpu = cpu;
+ thread__put(thread);
+
+ return 0;
+}
+
+/*
+ * Compares the raw arch string. N.B. see instead perf_env__arch() if a
+ * normalized arch is needed.
+ */
+bool machine__is(struct machine *machine, const char *arch)
+{
+ return machine && !strcmp(perf_env__raw_arch(machine->env), arch);
+}
+
+int machine__nr_cpus_avail(struct machine *machine)
+{
+ return machine ? perf_env__nr_cpus_avail(machine->env) : 0;
+}
+
+int machine__get_kernel_start(struct machine *machine)
+{
+ struct map *map = machine__kernel_map(machine);
+ int err = 0;
+
+ /*
+ * The only addresses above 2^63 are kernel addresses of a 64-bit
+ * kernel. Note that addresses are unsigned so that on a 32-bit system
+ * all addresses including kernel addresses are less than 2^32. In
+ * that case (32-bit system), if the kernel mapping is unknown, all
+ * addresses will be assumed to be in user space - see
+ * machine__kernel_ip().
+ */
+ machine->kernel_start = 1ULL << 63;
+ if (map) {
+ err = map__load(map);
+ /*
+ * On x86_64, PTI entry trampolines are less than the
+ * start of kernel text, but still above 2^63. So leave
+ * kernel_start = 1ULL << 63 for x86_64.
+ */
+ if (!err && !machine__is(machine, "x86_64"))
+ machine->kernel_start = map->start;
+ }
+ return err;
+}
+
+struct dso *machine__findnew_dso(struct machine *machine, const char *filename)
+{
+ return dsos__findnew(&machine->dsos, filename);
+}
+
+char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
+{
+ struct machine *machine = vmachine;
+ struct map *map;
+ struct symbol *sym = machine__find_kernel_symbol(machine, *addrp, &map);
+
+ if (sym == NULL)
+ return NULL;
+
+ *modp = __map__is_kmodule(map) ? (char *)map->dso->short_name : NULL;
+ *addrp = map->unmap_ip(map, sym->start);
+ return sym->name;
+}