1227 lines
28 KiB
C
1227 lines
28 KiB
C
#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 <stdbool.h>
|
|
#include "unwind.h"
|
|
|
|
int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
|
|
{
|
|
map_groups__init(&machine->kmaps);
|
|
RB_CLEAR_NODE(&machine->rb_node);
|
|
INIT_LIST_HEAD(&machine->user_dsos);
|
|
INIT_LIST_HEAD(&machine->kernel_dsos);
|
|
|
|
machine->threads = RB_ROOT;
|
|
INIT_LIST_HEAD(&machine->dead_threads);
|
|
machine->last_match = NULL;
|
|
|
|
machine->kmaps.machine = machine;
|
|
machine->pid = pid;
|
|
|
|
machine->root_dir = strdup(root_dir);
|
|
if (machine->root_dir == NULL)
|
|
return -ENOMEM;
|
|
|
|
if (pid != HOST_KERNEL_ID) {
|
|
struct thread *thread = machine__findnew_thread(machine, pid);
|
|
char comm[64];
|
|
|
|
if (thread == NULL)
|
|
return -ENOMEM;
|
|
|
|
snprintf(comm, sizeof(comm), "[guest/%d]", pid);
|
|
thread__set_comm(thread, comm);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dsos__delete(struct list_head *dsos)
|
|
{
|
|
struct dso *pos, *n;
|
|
|
|
list_for_each_entry_safe(pos, n, dsos, node) {
|
|
list_del(&pos->node);
|
|
dso__delete(pos);
|
|
}
|
|
}
|
|
|
|
void machine__delete_dead_threads(struct machine *machine)
|
|
{
|
|
struct thread *n, *t;
|
|
|
|
list_for_each_entry_safe(t, n, &machine->dead_threads, node) {
|
|
list_del(&t->node);
|
|
thread__delete(t);
|
|
}
|
|
}
|
|
|
|
void machine__delete_threads(struct machine *machine)
|
|
{
|
|
struct rb_node *nd = rb_first(&machine->threads);
|
|
|
|
while (nd) {
|
|
struct thread *t = rb_entry(nd, struct thread, rb_node);
|
|
|
|
rb_erase(&t->rb_node, &machine->threads);
|
|
nd = rb_next(nd);
|
|
thread__delete(t);
|
|
}
|
|
}
|
|
|
|
void machine__exit(struct machine *machine)
|
|
{
|
|
map_groups__exit(&machine->kmaps);
|
|
dsos__delete(&machine->user_dsos);
|
|
dsos__delete(&machine->kernel_dsos);
|
|
free(machine->root_dir);
|
|
machine->root_dir = NULL;
|
|
}
|
|
|
|
void machine__delete(struct machine *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;
|
|
}
|
|
|
|
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(true, 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);
|
|
}
|
|
}
|
|
|
|
char *machine__mmap_name(struct machine *machine, char *bf, size_t size)
|
|
{
|
|
if (machine__is_host(machine))
|
|
snprintf(bf, size, "[%s]", "kernel.kallsyms");
|
|
else if (machine__is_default_guest(machine))
|
|
snprintf(bf, size, "[%s]", "guest.kernel.kallsyms");
|
|
else {
|
|
snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms",
|
|
machine->pid);
|
|
}
|
|
|
|
return bf;
|
|
}
|
|
|
|
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 struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid,
|
|
bool create)
|
|
{
|
|
struct rb_node **p = &machine->threads.rb_node;
|
|
struct rb_node *parent = NULL;
|
|
struct thread *th;
|
|
|
|
/*
|
|
* Font-end cache - PID lookups come in blocks,
|
|
* so most of the time we dont have to look up
|
|
* the full rbtree:
|
|
*/
|
|
if (machine->last_match && machine->last_match->pid == pid)
|
|
return machine->last_match;
|
|
|
|
while (*p != NULL) {
|
|
parent = *p;
|
|
th = rb_entry(parent, struct thread, rb_node);
|
|
|
|
if (th->pid == pid) {
|
|
machine->last_match = th;
|
|
return th;
|
|
}
|
|
|
|
if (pid < th->pid)
|
|
p = &(*p)->rb_left;
|
|
else
|
|
p = &(*p)->rb_right;
|
|
}
|
|
|
|
if (!create)
|
|
return NULL;
|
|
|
|
th = thread__new(pid);
|
|
if (th != NULL) {
|
|
rb_link_node(&th->rb_node, parent, p);
|
|
rb_insert_color(&th->rb_node, &machine->threads);
|
|
machine->last_match = th;
|
|
}
|
|
|
|
return th;
|
|
}
|
|
|
|
struct thread *machine__findnew_thread(struct machine *machine, pid_t pid)
|
|
{
|
|
return __machine__findnew_thread(machine, pid, true);
|
|
}
|
|
|
|
struct thread *machine__find_thread(struct machine *machine, pid_t pid)
|
|
{
|
|
return __machine__findnew_thread(machine, pid, false);
|
|
}
|
|
|
|
int machine__process_comm_event(struct machine *machine, union perf_event *event)
|
|
{
|
|
struct thread *thread = machine__findnew_thread(machine, event->comm.tid);
|
|
|
|
if (dump_trace)
|
|
perf_event__fprintf_comm(event, stdout);
|
|
|
|
if (thread == NULL || thread__set_comm(thread, event->comm.comm)) {
|
|
dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int machine__process_lost_event(struct machine *machine __maybe_unused,
|
|
union perf_event *event)
|
|
{
|
|
dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
|
|
event->lost.id, event->lost.lost);
|
|
return 0;
|
|
}
|
|
|
|
struct map *machine__new_module(struct machine *machine, u64 start,
|
|
const char *filename)
|
|
{
|
|
struct map *map;
|
|
struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename);
|
|
|
|
if (dso == NULL)
|
|
return NULL;
|
|
|
|
map = map__new2(start, dso, MAP__FUNCTION);
|
|
if (map == NULL)
|
|
return NULL;
|
|
|
|
if (machine__is_host(machine))
|
|
dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE;
|
|
else
|
|
dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE;
|
|
map_groups__insert(&machine->kmaps, map);
|
|
return map;
|
|
}
|
|
|
|
size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
|
|
{
|
|
struct rb_node *nd;
|
|
size_t ret = __dsos__fprintf(&machines->host.kernel_dsos, fp) +
|
|
__dsos__fprintf(&machines->host.user_dsos, 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->kernel_dsos, fp);
|
|
ret += __dsos__fprintf(&pos->user_dsos, fp);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp,
|
|
bool (skip)(struct dso *dso, int parm), int parm)
|
|
{
|
|
return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, skip, parm) +
|
|
__dsos__fprintf_buildid(&machine->user_dsos, 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->vmlinux_maps[MAP__FUNCTION]->dso;
|
|
|
|
if (kdso->has_build_id) {
|
|
char filename[PATH_MAX];
|
|
if (dso__build_id_filename(kdso, filename, sizeof(filename)))
|
|
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)
|
|
{
|
|
size_t ret = 0;
|
|
struct rb_node *nd;
|
|
|
|
for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) {
|
|
struct thread *pos = rb_entry(nd, struct thread, rb_node);
|
|
|
|
ret += thread__fprintf(pos, fp);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct dso *machine__get_kernel(struct machine *machine)
|
|
{
|
|
const char *vmlinux_name = NULL;
|
|
struct dso *kernel;
|
|
|
|
if (machine__is_host(machine)) {
|
|
vmlinux_name = symbol_conf.vmlinux_name;
|
|
if (!vmlinux_name)
|
|
vmlinux_name = "[kernel.kallsyms]";
|
|
|
|
kernel = dso__kernel_findnew(machine, vmlinux_name,
|
|
"[kernel]",
|
|
DSO_TYPE_KERNEL);
|
|
} else {
|
|
char bf[PATH_MAX];
|
|
|
|
if (machine__is_default_guest(machine))
|
|
vmlinux_name = symbol_conf.default_guest_vmlinux_name;
|
|
if (!vmlinux_name)
|
|
vmlinux_name = machine__mmap_name(machine, bf,
|
|
sizeof(bf));
|
|
|
|
kernel = dso__kernel_findnew(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;
|
|
};
|
|
|
|
static int symbol__in_kernel(void *arg, const char *name,
|
|
char type __maybe_unused, u64 start)
|
|
{
|
|
struct process_args *args = arg;
|
|
|
|
if (strchr(name, '['))
|
|
return 0;
|
|
|
|
args->start = start;
|
|
return 1;
|
|
}
|
|
|
|
/* Figure out the start address of kernel map from /proc/kallsyms */
|
|
static u64 machine__get_kernel_start_addr(struct machine *machine)
|
|
{
|
|
const char *filename;
|
|
char path[PATH_MAX];
|
|
struct process_args args;
|
|
|
|
if (machine__is_host(machine)) {
|
|
filename = "/proc/kallsyms";
|
|
} else {
|
|
if (machine__is_default_guest(machine))
|
|
filename = (char *)symbol_conf.default_guest_kallsyms;
|
|
else {
|
|
sprintf(path, "%s/proc/kallsyms", machine->root_dir);
|
|
filename = path;
|
|
}
|
|
}
|
|
|
|
if (symbol__restricted_filename(filename, "/proc/kallsyms"))
|
|
return 0;
|
|
|
|
if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0)
|
|
return 0;
|
|
|
|
return args.start;
|
|
}
|
|
|
|
int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
|
|
{
|
|
enum map_type type;
|
|
u64 start = machine__get_kernel_start_addr(machine);
|
|
|
|
for (type = 0; type < MAP__NR_TYPES; ++type) {
|
|
struct kmap *kmap;
|
|
|
|
machine->vmlinux_maps[type] = map__new2(start, kernel, type);
|
|
if (machine->vmlinux_maps[type] == NULL)
|
|
return -1;
|
|
|
|
machine->vmlinux_maps[type]->map_ip =
|
|
machine->vmlinux_maps[type]->unmap_ip =
|
|
identity__map_ip;
|
|
kmap = map__kmap(machine->vmlinux_maps[type]);
|
|
kmap->kmaps = &machine->kmaps;
|
|
map_groups__insert(&machine->kmaps,
|
|
machine->vmlinux_maps[type]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void machine__destroy_kernel_maps(struct machine *machine)
|
|
{
|
|
enum map_type type;
|
|
|
|
for (type = 0; type < MAP__NR_TYPES; ++type) {
|
|
struct kmap *kmap;
|
|
|
|
if (machine->vmlinux_maps[type] == NULL)
|
|
continue;
|
|
|
|
kmap = map__kmap(machine->vmlinux_maps[type]);
|
|
map_groups__remove(&machine->kmaps,
|
|
machine->vmlinux_maps[type]);
|
|
if (kmap->ref_reloc_sym) {
|
|
/*
|
|
* ref_reloc_sym is shared among all maps, so free just
|
|
* on one of them.
|
|
*/
|
|
if (type == MAP__FUNCTION) {
|
|
free((char *)kmap->ref_reloc_sym->name);
|
|
kmap->ref_reloc_sym->name = NULL;
|
|
free(kmap->ref_reloc_sym);
|
|
}
|
|
kmap->ref_reloc_sym = NULL;
|
|
}
|
|
|
|
map__delete(machine->vmlinux_maps[type]);
|
|
machine->vmlinux_maps[type] = NULL;
|
|
}
|
|
}
|
|
|
|
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,
|
|
enum map_type type, symbol_filter_t filter)
|
|
{
|
|
struct map *map = machine->vmlinux_maps[type];
|
|
int ret = dso__load_kallsyms(map->dso, filename, map, filter);
|
|
|
|
if (ret > 0) {
|
|
dso__set_loaded(map->dso, type);
|
|
/*
|
|
* 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, type);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int machine__load_vmlinux_path(struct machine *machine, enum map_type type,
|
|
symbol_filter_t filter)
|
|
{
|
|
struct map *map = machine->vmlinux_maps[type];
|
|
int ret = dso__load_vmlinux_path(map->dso, map, filter);
|
|
|
|
if (ret > 0) {
|
|
dso__set_loaded(map->dso, type);
|
|
map__reloc_vmlinux(map);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void map_groups__fixup_end(struct map_groups *mg)
|
|
{
|
|
int i;
|
|
for (i = 0; i < MAP__NR_TYPES; ++i)
|
|
__map_groups__fixup_end(mg, i);
|
|
}
|
|
|
|
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 int map_groups__set_modules_path_dir(struct map_groups *mg,
|
|
const char *dir_name)
|
|
{
|
|
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;
|
|
|
|
ret = map_groups__set_modules_path_dir(mg, path);
|
|
if (ret < 0)
|
|
goto out;
|
|
} else {
|
|
char *dot = strrchr(dent->d_name, '.'),
|
|
dso_name[PATH_MAX];
|
|
struct map *map;
|
|
char *long_name;
|
|
|
|
if (dot == NULL || strcmp(dot, ".ko"))
|
|
continue;
|
|
snprintf(dso_name, sizeof(dso_name), "[%.*s]",
|
|
(int)(dot - dent->d_name), dent->d_name);
|
|
|
|
strxfrchar(dso_name, '-', '_');
|
|
map = map_groups__find_by_name(mg, MAP__FUNCTION,
|
|
dso_name);
|
|
if (map == NULL)
|
|
continue;
|
|
|
|
long_name = strdup(path);
|
|
if (long_name == NULL) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
dso__set_long_name(map->dso, long_name);
|
|
map->dso->lname_alloc = 1;
|
|
dso__kernel_module_get_build_id(map->dso, "");
|
|
}
|
|
}
|
|
|
|
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/kernel",
|
|
machine->root_dir, version);
|
|
free(version);
|
|
|
|
return map_groups__set_modules_path_dir(&machine->kmaps, modules_path);
|
|
}
|
|
|
|
static int machine__create_modules(struct machine *machine)
|
|
{
|
|
char *line = NULL;
|
|
size_t n;
|
|
FILE *file;
|
|
struct map *map;
|
|
const char *modules;
|
|
char path[PATH_MAX];
|
|
|
|
if (machine__is_default_guest(machine))
|
|
modules = symbol_conf.default_guest_modules;
|
|
else {
|
|
sprintf(path, "%s/proc/modules", machine->root_dir);
|
|
modules = path;
|
|
}
|
|
|
|
if (symbol__restricted_filename(path, "/proc/modules"))
|
|
return -1;
|
|
|
|
file = fopen(modules, "r");
|
|
if (file == NULL)
|
|
return -1;
|
|
|
|
while (!feof(file)) {
|
|
char name[PATH_MAX];
|
|
u64 start;
|
|
char *sep;
|
|
int line_len;
|
|
|
|
line_len = getline(&line, &n, file);
|
|
if (line_len < 0)
|
|
break;
|
|
|
|
if (!line)
|
|
goto out_failure;
|
|
|
|
line[--line_len] = '\0'; /* \n */
|
|
|
|
sep = strrchr(line, 'x');
|
|
if (sep == NULL)
|
|
continue;
|
|
|
|
hex2u64(sep + 1, &start);
|
|
|
|
sep = strchr(line, ' ');
|
|
if (sep == NULL)
|
|
continue;
|
|
|
|
*sep = '\0';
|
|
|
|
snprintf(name, sizeof(name), "[%s]", line);
|
|
map = machine__new_module(machine, start, name);
|
|
if (map == NULL)
|
|
goto out_delete_line;
|
|
dso__kernel_module_get_build_id(map->dso, machine->root_dir);
|
|
}
|
|
|
|
free(line);
|
|
fclose(file);
|
|
|
|
return machine__set_modules_path(machine);
|
|
|
|
out_delete_line:
|
|
free(line);
|
|
out_failure:
|
|
return -1;
|
|
}
|
|
|
|
int machine__create_kernel_maps(struct machine *machine)
|
|
{
|
|
struct dso *kernel = machine__get_kernel(machine);
|
|
|
|
if (kernel == NULL ||
|
|
__machine__create_kernel_maps(machine, kernel) < 0)
|
|
return -1;
|
|
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* Now that we have all the maps created, just set the ->end of them:
|
|
*/
|
|
map_groups__fixup_end(&machine->kmaps);
|
|
return 0;
|
|
}
|
|
|
|
static void machine__set_kernel_mmap_len(struct machine *machine,
|
|
union perf_event *event)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < MAP__NR_TYPES; i++) {
|
|
machine->vmlinux_maps[i]->start = event->mmap.start;
|
|
machine->vmlinux_maps[i]->end = (event->mmap.start +
|
|
event->mmap.len);
|
|
/*
|
|
* Be a bit paranoid here, some perf.data file came with
|
|
* a zero sized synthesized MMAP event for the kernel.
|
|
*/
|
|
if (machine->vmlinux_maps[i]->end == 0)
|
|
machine->vmlinux_maps[i]->end = ~0ULL;
|
|
}
|
|
}
|
|
|
|
static int machine__process_kernel_mmap_event(struct machine *machine,
|
|
union perf_event *event)
|
|
{
|
|
struct map *map;
|
|
char kmmap_prefix[PATH_MAX];
|
|
enum dso_kernel_type kernel_type;
|
|
bool is_kernel_mmap;
|
|
|
|
machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
|
|
if (machine__is_host(machine))
|
|
kernel_type = DSO_TYPE_KERNEL;
|
|
else
|
|
kernel_type = DSO_TYPE_GUEST_KERNEL;
|
|
|
|
is_kernel_mmap = memcmp(event->mmap.filename,
|
|
kmmap_prefix,
|
|
strlen(kmmap_prefix) - 1) == 0;
|
|
if (event->mmap.filename[0] == '/' ||
|
|
(!is_kernel_mmap && event->mmap.filename[0] == '[')) {
|
|
|
|
char short_module_name[1024];
|
|
char *name, *dot;
|
|
|
|
if (event->mmap.filename[0] == '/') {
|
|
name = strrchr(event->mmap.filename, '/');
|
|
if (name == NULL)
|
|
goto out_problem;
|
|
|
|
++name; /* skip / */
|
|
dot = strrchr(name, '.');
|
|
if (dot == NULL)
|
|
goto out_problem;
|
|
snprintf(short_module_name, sizeof(short_module_name),
|
|
"[%.*s]", (int)(dot - name), name);
|
|
strxfrchar(short_module_name, '-', '_');
|
|
} else
|
|
strcpy(short_module_name, event->mmap.filename);
|
|
|
|
map = machine__new_module(machine, event->mmap.start,
|
|
event->mmap.filename);
|
|
if (map == NULL)
|
|
goto out_problem;
|
|
|
|
name = strdup(short_module_name);
|
|
if (name == NULL)
|
|
goto out_problem;
|
|
|
|
map->dso->short_name = name;
|
|
map->dso->sname_alloc = 1;
|
|
map->end = map->start + event->mmap.len;
|
|
} else if (is_kernel_mmap) {
|
|
const char *symbol_name = (event->mmap.filename +
|
|
strlen(kmmap_prefix));
|
|
/*
|
|
* Should be there already, from the build-id table in
|
|
* the header.
|
|
*/
|
|
struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
|
|
kmmap_prefix);
|
|
if (kernel == NULL)
|
|
goto out_problem;
|
|
|
|
kernel->kernel = kernel_type;
|
|
if (__machine__create_kernel_maps(machine, kernel) < 0)
|
|
goto out_problem;
|
|
|
|
machine__set_kernel_mmap_len(machine, event);
|
|
|
|
/*
|
|
* 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) {
|
|
maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
|
|
symbol_name,
|
|
event->mmap.pgoff);
|
|
}
|
|
|
|
if (machine__is_default_guest(machine)) {
|
|
/*
|
|
* preload dso of guest kernel and modules
|
|
*/
|
|
dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
|
|
NULL);
|
|
}
|
|
}
|
|
return 0;
|
|
out_problem:
|
|
return -1;
|
|
}
|
|
|
|
int machine__process_mmap_event(struct machine *machine, union perf_event *event)
|
|
{
|
|
u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
|
|
struct thread *thread;
|
|
struct map *map;
|
|
int ret = 0;
|
|
|
|
if (dump_trace)
|
|
perf_event__fprintf_mmap(event, stdout);
|
|
|
|
if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
|
|
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);
|
|
if (thread == NULL)
|
|
goto out_problem;
|
|
map = map__new(&machine->user_dsos, event->mmap.start,
|
|
event->mmap.len, event->mmap.pgoff,
|
|
event->mmap.pid, event->mmap.filename,
|
|
MAP__FUNCTION);
|
|
if (map == NULL)
|
|
goto out_problem;
|
|
|
|
thread__insert_map(thread, map);
|
|
return 0;
|
|
|
|
out_problem:
|
|
dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
|
|
return 0;
|
|
}
|
|
|
|
int machine__process_fork_event(struct machine *machine, union perf_event *event)
|
|
{
|
|
struct thread *thread = machine__findnew_thread(machine, event->fork.tid);
|
|
struct thread *parent = machine__findnew_thread(machine, event->fork.ptid);
|
|
|
|
if (dump_trace)
|
|
perf_event__fprintf_task(event, stdout);
|
|
|
|
if (thread == NULL || parent == NULL ||
|
|
thread__fork(thread, parent) < 0) {
|
|
dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int machine__process_exit_event(struct machine *machine, union perf_event *event)
|
|
{
|
|
struct thread *thread = machine__find_thread(machine, event->fork.tid);
|
|
|
|
if (dump_trace)
|
|
perf_event__fprintf_task(event, stdout);
|
|
|
|
if (thread != NULL)
|
|
machine__remove_thread(machine, thread);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int machine__process_event(struct machine *machine, union perf_event *event)
|
|
{
|
|
int ret;
|
|
|
|
switch (event->header.type) {
|
|
case PERF_RECORD_COMM:
|
|
ret = machine__process_comm_event(machine, event); break;
|
|
case PERF_RECORD_MMAP:
|
|
ret = machine__process_mmap_event(machine, event); break;
|
|
case PERF_RECORD_FORK:
|
|
ret = machine__process_fork_event(machine, event); break;
|
|
case PERF_RECORD_EXIT:
|
|
ret = machine__process_exit_event(machine, event); break;
|
|
case PERF_RECORD_LOST:
|
|
ret = machine__process_lost_event(machine, event); break;
|
|
default:
|
|
ret = -1;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void machine__remove_thread(struct machine *machine, struct thread *th)
|
|
{
|
|
machine->last_match = NULL;
|
|
rb_erase(&th->rb_node, &machine->threads);
|
|
/*
|
|
* We may have references to this thread, for instance in some hist_entry
|
|
* instances, so just move them to a separate list.
|
|
*/
|
|
list_add_tail(&th->node, &machine->dead_threads);
|
|
}
|
|
|
|
static bool symbol__match_parent_regex(struct symbol *sym)
|
|
{
|
|
if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const u8 cpumodes[] = {
|
|
PERF_RECORD_MISC_USER,
|
|
PERF_RECORD_MISC_KERNEL,
|
|
PERF_RECORD_MISC_GUEST_USER,
|
|
PERF_RECORD_MISC_GUEST_KERNEL
|
|
};
|
|
#define NCPUMODES (sizeof(cpumodes)/sizeof(u8))
|
|
|
|
static void ip__resolve_ams(struct machine *machine, struct thread *thread,
|
|
struct addr_map_symbol *ams,
|
|
u64 ip)
|
|
{
|
|
struct addr_location al;
|
|
size_t i;
|
|
u8 m;
|
|
|
|
memset(&al, 0, sizeof(al));
|
|
|
|
for (i = 0; i < NCPUMODES; i++) {
|
|
m = cpumodes[i];
|
|
/*
|
|
* 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_addr_location(thread, machine, m, MAP__FUNCTION,
|
|
ip, &al, NULL);
|
|
if (al.sym)
|
|
goto found;
|
|
}
|
|
found:
|
|
ams->addr = ip;
|
|
ams->al_addr = al.addr;
|
|
ams->sym = al.sym;
|
|
ams->map = al.map;
|
|
}
|
|
|
|
struct branch_info *machine__resolve_bstack(struct machine *machine,
|
|
struct thread *thr,
|
|
struct branch_stack *bs)
|
|
{
|
|
struct branch_info *bi;
|
|
unsigned int i;
|
|
|
|
bi = calloc(bs->nr, sizeof(struct branch_info));
|
|
if (!bi)
|
|
return NULL;
|
|
|
|
for (i = 0; i < bs->nr; i++) {
|
|
ip__resolve_ams(machine, thr, &bi[i].to, bs->entries[i].to);
|
|
ip__resolve_ams(machine, thr, &bi[i].from, bs->entries[i].from);
|
|
bi[i].flags = bs->entries[i].flags;
|
|
}
|
|
return bi;
|
|
}
|
|
|
|
static int machine__resolve_callchain_sample(struct machine *machine,
|
|
struct thread *thread,
|
|
struct ip_callchain *chain,
|
|
struct symbol **parent)
|
|
|
|
{
|
|
u8 cpumode = PERF_RECORD_MISC_USER;
|
|
unsigned int i;
|
|
int err;
|
|
|
|
callchain_cursor_reset(&callchain_cursor);
|
|
|
|
if (chain->nr > PERF_MAX_STACK_DEPTH) {
|
|
pr_warning("corrupted callchain. skipping...\n");
|
|
return 0;
|
|
}
|
|
|
|
for (i = 0; i < chain->nr; i++) {
|
|
u64 ip;
|
|
struct addr_location al;
|
|
|
|
if (callchain_param.order == ORDER_CALLEE)
|
|
ip = chain->ips[i];
|
|
else
|
|
ip = chain->ips[chain->nr - i - 1];
|
|
|
|
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(&callchain_cursor);
|
|
return 0;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
al.filtered = false;
|
|
thread__find_addr_location(thread, machine, cpumode,
|
|
MAP__FUNCTION, ip, &al, NULL);
|
|
if (al.sym != NULL) {
|
|
if (sort__has_parent && !*parent &&
|
|
symbol__match_parent_regex(al.sym))
|
|
*parent = al.sym;
|
|
if (!symbol_conf.use_callchain)
|
|
break;
|
|
}
|
|
|
|
err = callchain_cursor_append(&callchain_cursor,
|
|
ip, al.map, al.sym);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int unwind_entry(struct unwind_entry *entry, void *arg)
|
|
{
|
|
struct callchain_cursor *cursor = arg;
|
|
return callchain_cursor_append(cursor, entry->ip,
|
|
entry->map, entry->sym);
|
|
}
|
|
|
|
int machine__resolve_callchain(struct machine *machine,
|
|
struct perf_evsel *evsel,
|
|
struct thread *thread,
|
|
struct perf_sample *sample,
|
|
struct symbol **parent)
|
|
|
|
{
|
|
int ret;
|
|
|
|
callchain_cursor_reset(&callchain_cursor);
|
|
|
|
ret = machine__resolve_callchain_sample(machine, thread,
|
|
sample->callchain, parent);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* 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, &callchain_cursor, machine,
|
|
thread, evsel->attr.sample_regs_user,
|
|
sample);
|
|
|
|
}
|