[mirror_ubuntu-artful-kernel.git] / tools / perf / util / session.c

#define _FILE_OFFSET_BITS 64

#include <linux/kernel.h>

#include <byteswap.h>
#include <unistd.h>
#include <sys/types.h>

#include "session.h"
#include "sort.h"
#include "util.h"

static int perf_session__open(struct perf_session *self, bool force)
{
	struct stat input_stat;

	if (!strcmp(self->filename, "-")) {
		self->fd_pipe = true;
		self->fd = STDIN_FILENO;

		if (perf_header__read(self, self->fd) < 0)
			pr_err("incompatible file format");

		return 0;
	}

	self->fd = open(self->filename, O_RDONLY);
	if (self->fd < 0) {
		pr_err("failed to open file: %s", self->filename);
		if (!strcmp(self->filename, "perf.data"))
			pr_err("  (try 'perf record' first)");
		pr_err("\n");
		return -errno;
	}

	if (fstat(self->fd, &input_stat) < 0)
		goto out_close;

	if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
		pr_err("file %s not owned by current user or root\n",
		       self->filename);
		goto out_close;
	}

	if (!input_stat.st_size) {
		pr_info("zero-sized file (%s), nothing to do!\n",
			self->filename);
		goto out_close;
	}

	if (perf_header__read(self, self->fd) < 0) {
		pr_err("incompatible file format");
		goto out_close;
	}

	self->size = input_stat.st_size;
	return 0;

out_close:
	close(self->fd);
	self->fd = -1;
	return -1;
}

void perf_session__update_sample_type(struct perf_session *self)
{
	self->sample_type = perf_header__sample_type(&self->header);
}

int perf_session__create_kernel_maps(struct perf_session *self)
{
	int ret;
	struct rb_root *root = &self->kerninfo_root;

	ret = map_groups__create_kernel_maps(root, HOST_KERNEL_ID);
	if (ret >= 0)
		ret = map_groups__create_guest_kernel_maps(root);
	return ret;
}

struct perf_session *perf_session__new(const char *filename, int mode, bool force)
{
	size_t len = filename ? strlen(filename) + 1 : 0;
	struct perf_session *self = zalloc(sizeof(*self) + len);

	if (self == NULL)
		goto out;

	if (perf_header__init(&self->header) < 0)
		goto out_free;

	memcpy(self->filename, filename, len);
	self->threads = RB_ROOT;
	self->stats_by_id = RB_ROOT;
	self->last_match = NULL;
	self->mmap_window = 32;
	self->cwd = NULL;
	self->cwdlen = 0;
	self->unknown_events = 0;
	self->kerninfo_root = RB_ROOT;

	if (mode == O_RDONLY) {
		if (perf_session__open(self, force) < 0)
			goto out_delete;
	} else if (mode == O_WRONLY) {
		/*
		 * In O_RDONLY mode this will be performed when reading the
		 * kernel MMAP event, in event__process_mmap().
		 */
		if (perf_session__create_kernel_maps(self) < 0)
			goto out_delete;
	}

	perf_session__update_sample_type(self);
out:
	return self;
out_free:
	free(self);
	return NULL;
out_delete:
	perf_session__delete(self);
	return NULL;
}

void perf_session__delete(struct perf_session *self)
{
	perf_header__exit(&self->header);
	close(self->fd);
	free(self->cwd);
	free(self);
}

static bool symbol__match_parent_regex(struct symbol *sym)
{
	if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
		return 1;

	return 0;
}

struct map_symbol *perf_session__resolve_callchain(struct perf_session *self,
						   struct thread *thread,
						   struct ip_callchain *chain,
						   struct symbol **parent)
{
	u8 cpumode = PERF_RECORD_MISC_USER;
	unsigned int i;
	struct map_symbol *syms = calloc(chain->nr, sizeof(*syms));

	if (!syms)
		return NULL;

	for (i = 0; i < chain->nr; i++) {
		u64 ip = chain->ips[i];
		struct addr_location al;

		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:
				break;
			}
			continue;
		}

		al.filtered = false;
		thread__find_addr_location(thread, self, cpumode,
				MAP__FUNCTION, thread->pid, 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;
			syms[i].map = al.map;
			syms[i].sym = al.sym;
		}
	}

	return syms;
}

static int process_event_stub(event_t *event __used,
			      struct perf_session *session __used)
{
	dump_printf(": unhandled!\n");
	return 0;
}

static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
{
	if (handler->sample == NULL)
		handler->sample = process_event_stub;
	if (handler->mmap == NULL)
		handler->mmap = process_event_stub;
	if (handler->comm == NULL)
		handler->comm = process_event_stub;
	if (handler->fork == NULL)
		handler->fork = process_event_stub;
	if (handler->exit == NULL)
		handler->exit = process_event_stub;
	if (handler->lost == NULL)
		handler->lost = process_event_stub;
	if (handler->read == NULL)
		handler->read = process_event_stub;
	if (handler->throttle == NULL)
		handler->throttle = process_event_stub;
	if (handler->unthrottle == NULL)
		handler->unthrottle = process_event_stub;
	if (handler->attr == NULL)
		handler->attr = process_event_stub;
	if (handler->event_type == NULL)
		handler->event_type = process_event_stub;
	if (handler->tracing_data == NULL)
		handler->tracing_data = process_event_stub;
	if (handler->build_id == NULL)
		handler->build_id = process_event_stub;
}

static const char *event__name[] = {
	[0]			 = "TOTAL",
	[PERF_RECORD_MMAP]	 = "MMAP",
	[PERF_RECORD_LOST]	 = "LOST",
	[PERF_RECORD_COMM]	 = "COMM",
	[PERF_RECORD_EXIT]	 = "EXIT",
	[PERF_RECORD_THROTTLE]	 = "THROTTLE",
	[PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
	[PERF_RECORD_FORK]	 = "FORK",
	[PERF_RECORD_READ]	 = "READ",
	[PERF_RECORD_SAMPLE]	 = "SAMPLE",
	[PERF_RECORD_HEADER_ATTR]	 = "ATTR",
	[PERF_RECORD_HEADER_EVENT_TYPE]	 = "EVENT_TYPE",
	[PERF_RECORD_HEADER_TRACING_DATA]	 = "TRACING_DATA",
	[PERF_RECORD_HEADER_BUILD_ID]	 = "BUILD_ID",
};

unsigned long event__total[PERF_RECORD_HEADER_MAX];

void event__print_totals(void)
{
	int i;
	for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) {
		if (!event__name[i])
			continue;
		pr_info("%10s events: %10ld\n",
			event__name[i], event__total[i]);
	}
}

void mem_bswap_64(void *src, int byte_size)
{
	u64 *m = src;

	while (byte_size > 0) {
		*m = bswap_64(*m);
		byte_size -= sizeof(u64);
		++m;
	}
}

static void event__all64_swap(event_t *self)
{
	struct perf_event_header *hdr = &self->header;
	mem_bswap_64(hdr + 1, self->header.size - sizeof(*hdr));
}

static void event__comm_swap(event_t *self)
{
	self->comm.pid = bswap_32(self->comm.pid);
	self->comm.tid = bswap_32(self->comm.tid);
}

static void event__mmap_swap(event_t *self)
{
	self->mmap.pid	 = bswap_32(self->mmap.pid);
	self->mmap.tid	 = bswap_32(self->mmap.tid);
	self->mmap.start = bswap_64(self->mmap.start);
	self->mmap.len	 = bswap_64(self->mmap.len);
	self->mmap.pgoff = bswap_64(self->mmap.pgoff);
}

static void event__task_swap(event_t *self)
{
	self->fork.pid	= bswap_32(self->fork.pid);
	self->fork.tid	= bswap_32(self->fork.tid);
	self->fork.ppid	= bswap_32(self->fork.ppid);
	self->fork.ptid	= bswap_32(self->fork.ptid);
	self->fork.time	= bswap_64(self->fork.time);
}

static void event__read_swap(event_t *self)
{
	self->read.pid		= bswap_32(self->read.pid);
	self->read.tid		= bswap_32(self->read.tid);
	self->read.value	= bswap_64(self->read.value);
	self->read.time_enabled	= bswap_64(self->read.time_enabled);
	self->read.time_running	= bswap_64(self->read.time_running);
	self->read.id		= bswap_64(self->read.id);
}

static void event__attr_swap(event_t *self)
{
	size_t size;

	self->attr.attr.type		= bswap_32(self->attr.attr.type);
	self->attr.attr.size		= bswap_32(self->attr.attr.size);
	self->attr.attr.config		= bswap_64(self->attr.attr.config);
	self->attr.attr.sample_period	= bswap_64(self->attr.attr.sample_period);
	self->attr.attr.sample_type	= bswap_64(self->attr.attr.sample_type);
	self->attr.attr.read_format	= bswap_64(self->attr.attr.read_format);
	self->attr.attr.wakeup_events	= bswap_32(self->attr.attr.wakeup_events);
	self->attr.attr.bp_type		= bswap_32(self->attr.attr.bp_type);
	self->attr.attr.bp_addr		= bswap_64(self->attr.attr.bp_addr);
	self->attr.attr.bp_len		= bswap_64(self->attr.attr.bp_len);

	size = self->header.size;
	size -= (void *)&self->attr.id - (void *)self;
	mem_bswap_64(self->attr.id, size);
}

static void event__event_type_swap(event_t *self)
{
	self->event_type.event_type.event_id =
		bswap_64(self->event_type.event_type.event_id);
}

static void event__tracing_data_swap(event_t *self)
{
	self->tracing_data.size = bswap_32(self->tracing_data.size);
}

typedef void (*event__swap_op)(event_t *self);

static event__swap_op event__swap_ops[] = {
	[PERF_RECORD_MMAP]   = event__mmap_swap,
	[PERF_RECORD_COMM]   = event__comm_swap,
	[PERF_RECORD_FORK]   = event__task_swap,
	[PERF_RECORD_EXIT]   = event__task_swap,
	[PERF_RECORD_LOST]   = event__all64_swap,
	[PERF_RECORD_READ]   = event__read_swap,
	[PERF_RECORD_SAMPLE] = event__all64_swap,
	[PERF_RECORD_HEADER_ATTR]   = event__attr_swap,
	[PERF_RECORD_HEADER_EVENT_TYPE]   = event__event_type_swap,
	[PERF_RECORD_HEADER_TRACING_DATA]   = event__tracing_data_swap,
	[PERF_RECORD_HEADER_BUILD_ID]   = NULL,
	[PERF_RECORD_HEADER_MAX]    = NULL,
};

static int perf_session__process_event(struct perf_session *self,
				       event_t *event,
				       struct perf_event_ops *ops,
				       u64 offset, u64 head)
{
	trace_event(event);

	if (event->header.type < PERF_RECORD_HEADER_MAX) {
		dump_printf("%#Lx [%#x]: PERF_RECORD_%s",
			    offset + head, event->header.size,
			    event__name[event->header.type]);
		++event__total[0];
		++event__total[event->header.type];
	}

	if (self->header.needs_swap && event__swap_ops[event->header.type])
		event__swap_ops[event->header.type](event);

	switch (event->header.type) {
	case PERF_RECORD_SAMPLE:
		return ops->sample(event, self);
	case PERF_RECORD_MMAP:
		return ops->mmap(event, self);
	case PERF_RECORD_COMM:
		return ops->comm(event, self);
	case PERF_RECORD_FORK:
		return ops->fork(event, self);
	case PERF_RECORD_EXIT:
		return ops->exit(event, self);
	case PERF_RECORD_LOST:
		return ops->lost(event, self);
	case PERF_RECORD_READ:
		return ops->read(event, self);
	case PERF_RECORD_THROTTLE:
		return ops->throttle(event, self);
	case PERF_RECORD_UNTHROTTLE:
		return ops->unthrottle(event, self);
	case PERF_RECORD_HEADER_ATTR:
		return ops->attr(event, self);
	case PERF_RECORD_HEADER_EVENT_TYPE:
		return ops->event_type(event, self);
	case PERF_RECORD_HEADER_TRACING_DATA:
		/* setup for reading amidst mmap */
		lseek(self->fd, offset + head, SEEK_SET);
		return ops->tracing_data(event, self);
	case PERF_RECORD_HEADER_BUILD_ID:
		return ops->build_id(event, self);
	default:
		self->unknown_events++;
		return -1;
	}
}

void perf_event_header__bswap(struct perf_event_header *self)
{
	self->type = bswap_32(self->type);
	self->misc = bswap_16(self->misc);
	self->size = bswap_16(self->size);
}

static struct thread *perf_session__register_idle_thread(struct perf_session *self)
{
	struct thread *thread = perf_session__findnew(self, 0);

	if (thread == NULL || thread__set_comm(thread, "swapper")) {
		pr_err("problem inserting idle task.\n");
		thread = NULL;
	}

	return thread;
}

int do_read(int fd, void *buf, size_t size)
{
	void *buf_start = buf;

	while (size) {
		int ret = read(fd, buf, size);

		if (ret <= 0)
			return ret;

		size -= ret;
		buf += ret;
	}

	return buf - buf_start;
}

#define session_done()	(*(volatile int *)(&session_done))
volatile int session_done;

static int __perf_session__process_pipe_events(struct perf_session *self,
					       struct perf_event_ops *ops)
{
	event_t event;
	uint32_t size;
	int skip = 0;
	u64 head;
	int err;
	void *p;

	perf_event_ops__fill_defaults(ops);

	head = 0;
more:
	err = do_read(self->fd, &event, sizeof(struct perf_event_header));
	if (err <= 0) {
		if (err == 0)
			goto done;

		pr_err("failed to read event header\n");
		goto out_err;
	}

	if (self->header.needs_swap)
		perf_event_header__bswap(&event.header);

	size = event.header.size;
	if (size == 0)
		size = 8;

	p = &event;
	p += sizeof(struct perf_event_header);

	err = do_read(self->fd, p, size - sizeof(struct perf_event_header));
	if (err <= 0) {
		if (err == 0) {
			pr_err("unexpected end of event stream\n");
			goto done;
		}

		pr_err("failed to read event data\n");
		goto out_err;
	}

	if (size == 0 ||
	    (skip = perf_session__process_event(self, &event, ops,
						0, head)) < 0) {
		dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n",
			    head, event.header.size, event.header.type);
		/*
		 * assume we lost track of the stream, check alignment, and
		 * increment a single u64 in the hope to catch on again 'soon'.
		 */
		if (unlikely(head & 7))
			head &= ~7ULL;

		size = 8;
	}

	head += size;

	dump_printf("\n%#Lx [%#x]: event: %d\n",
		    head, event.header.size, event.header.type);

	if (skip > 0)
		head += skip;

	if (!session_done())
		goto more;
done:
	err = 0;
out_err:
	return err;
}

int __perf_session__process_events(struct perf_session *self,
				   u64 data_offset, u64 data_size,
				   u64 file_size, struct perf_event_ops *ops)
{
	int err, mmap_prot, mmap_flags;
	u64 head, shift;
	u64 offset = 0;
	size_t	page_size;
	event_t *event;
	uint32_t size;
	char *buf;
	struct ui_progress *progress = ui_progress__new("Processing events...",
							self->size);
	if (progress == NULL)
		return -1;

	perf_event_ops__fill_defaults(ops);

	page_size = sysconf(_SC_PAGESIZE);

	head = data_offset;
	shift = page_size * (head / page_size);
	offset += shift;
	head -= shift;

	mmap_prot  = PROT_READ;
	mmap_flags = MAP_SHARED;

	if (self->header.needs_swap) {
		mmap_prot  |= PROT_WRITE;
		mmap_flags = MAP_PRIVATE;
	}
remap:
	buf = mmap(NULL, page_size * self->mmap_window, mmap_prot,
		   mmap_flags, self->fd, offset);
	if (buf == MAP_FAILED) {
		pr_err("failed to mmap file\n");
		err = -errno;
		goto out_err;
	}

more:
	event = (event_t *)(buf + head);
	ui_progress__update(progress, offset);

	if (self->header.needs_swap)
		perf_event_header__bswap(&event->header);
	size = event->header.size;
	if (size == 0)
		size = 8;

	if (head + event->header.size >= page_size * self->mmap_window) {
		int munmap_ret;

		shift = page_size * (head / page_size);

		munmap_ret = munmap(buf, page_size * self->mmap_window);
		assert(munmap_ret == 0);

		offset += shift;
		head -= shift;
		goto remap;
	}

	size = event->header.size;

	dump_printf("\n%#Lx [%#x]: event: %d\n",
		    offset + head, event->header.size, event->header.type);

	if (size == 0 ||
	    perf_session__process_event(self, event, ops, offset, head) < 0) {
		dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n",
			    offset + head, event->header.size,
			    event->header.type);
		/*
		 * assume we lost track of the stream, check alignment, and
		 * increment a single u64 in the hope to catch on again 'soon'.
		 */
		if (unlikely(head & 7))
			head &= ~7ULL;

		size = 8;
	}

	head += size;

	if (offset + head >= data_offset + data_size)
		goto done;

	if (offset + head < file_size)
		goto more;
done:
	err = 0;
out_err:
	ui_progress__delete(progress);
	return err;
}

int perf_session__process_events(struct perf_session *self,
				 struct perf_event_ops *ops)
{
	int err;

	if (perf_session__register_idle_thread(self) == NULL)
		return -ENOMEM;

	if (!symbol_conf.full_paths) {
		char bf[PATH_MAX];

		if (getcwd(bf, sizeof(bf)) == NULL) {
			err = -errno;
out_getcwd_err:
			pr_err("failed to get the current directory\n");
			goto out_err;
		}
		self->cwd = strdup(bf);
		if (self->cwd == NULL) {
			err = -ENOMEM;
			goto out_getcwd_err;
		}
		self->cwdlen = strlen(self->cwd);
	}

	if (!self->fd_pipe)
		err = __perf_session__process_events(self,
						     self->header.data_offset,
						     self->header.data_size,
						     self->size, ops);
	else
		err = __perf_session__process_pipe_events(self, ops);
out_err:
	return err;
}

bool perf_session__has_traces(struct perf_session *self, const char *msg)
{
	if (!(self->sample_type & PERF_SAMPLE_RAW)) {
		pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
		return false;
	}

	return true;
}

int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps,
					     const char *symbol_name,
					     u64 addr)
{
	char *bracket;
	enum map_type i;
	struct ref_reloc_sym *ref;

	ref = zalloc(sizeof(struct ref_reloc_sym));
	if (ref == NULL)
		return -ENOMEM;

	ref->name = strdup(symbol_name);
	if (ref->name == NULL) {
		free(ref);
		return -ENOMEM;
	}

	bracket = strchr(ref->name, ']');
	if (bracket)
		*bracket = '\0';

	ref->addr = addr;

	for (i = 0; i < MAP__NR_TYPES; ++i) {
		struct kmap *kmap = map__kmap(maps[i]);
		kmap->ref_reloc_sym = ref;
	}

	return 0;
}
Commit	Line	Data
b8f46c5a XG	1	#define _FILE_OFFSET_BITS 64
b8f46c5a XG	2
94c744b6 ACM	3	#include <linux/kernel.h>
94c744b6 ACM	4
ba21594c	5	#include <byteswap.h>
94c744b6 ACM	6	#include <unistd.h>
	7	#include <sys/types.h>
	8
	9	#include "session.h"
a328626b	10	#include "sort.h"
94c744b6 ACM	11	#include "util.h"
	12
	13	static int perf_session__open(struct perf_session *self, bool force)
	14	{
	15	struct stat input_stat;
	16
8dc58101 TZ	17	if (!strcmp(self->filename, "-")) {
	18	self->fd_pipe = true;
	19	self->fd = STDIN_FILENO;
	20
	21	if (perf_header__read(self, self->fd) < 0)
	22	pr_err("incompatible file format");
	23
	24	return 0;
	25	}
	26
f887f301	27	self->fd = open(self->filename, O_RDONLY);
94c744b6 ACM	28	if (self->fd < 0) {
	29	pr_err("failed to open file: %s", self->filename);
	30	if (!strcmp(self->filename, "perf.data"))
	31	pr_err(" (try 'perf record' first)");
	32	pr_err("\n");
	33	return -errno;
	34	}
	35
	36	if (fstat(self->fd, &input_stat) < 0)
	37	goto out_close;
	38
	39	if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
	40	pr_err("file %s not owned by current user or root\n",
	41	self->filename);
	42	goto out_close;
	43	}
	44
	45	if (!input_stat.st_size) {
	46	pr_info("zero-sized file (%s), nothing to do!\n",
	47	self->filename);
	48	goto out_close;
	49	}
	50
8dc58101	51	if (perf_header__read(self, self->fd) < 0) {
94c744b6 ACM	52	pr_err("incompatible file format");
	53	goto out_close;
	54	}
	55
	56	self->size = input_stat.st_size;
	57	return 0;
	58
	59	out_close:
	60	close(self->fd);
	61	self->fd = -1;
	62	return -1;
	63	}
	64
8dc58101 TZ	65	void perf_session__update_sample_type(struct perf_session *self)
	66	{
	67	self->sample_type = perf_header__sample_type(&self->header);
	68	}
	69
a1645ce1 ZY	70	int perf_session__create_kernel_maps(struct perf_session *self)
	71	{
	72	int ret;
	73	struct rb_root *root = &self->kerninfo_root;
	74
	75	ret = map_groups__create_kernel_maps(root, HOST_KERNEL_ID);
	76	if (ret >= 0)
	77	ret = map_groups__create_guest_kernel_maps(root);
	78	return ret;
	79	}
	80
75be6cf4	81	struct perf_session perf_session__new(const char filename, int mode, bool force)
94c744b6	82	{
b3165f41	83	size_t len = filename ? strlen(filename) + 1 : 0;
94c744b6 ACM	84	struct perf_session self = zalloc(sizeof(self) + len);
	85
	86	if (self == NULL)
	87	goto out;
	88
	89	if (perf_header__init(&self->header) < 0)
4aa65636	90	goto out_free;
94c744b6 ACM	91
94c744b6 ACM	92	memcpy(self->filename, filename, len);
b3165f41	93	self->threads = RB_ROOT;
cb8f0939	94	self->stats_by_id = RB_ROOT;
b3165f41	95	self->last_match = NULL;
ec913369 ACM	96	self->mmap_window = 32;
	97	self->cwd = NULL;
	98	self->cwdlen = 0;
31d337c4	99	self->unknown_events = 0;
a1645ce1	100	self->kerninfo_root = RB_ROOT;
94c744b6	101
64abebf7 ACM	102	if (mode == O_RDONLY) {
	103	if (perf_session__open(self, force) < 0)
	104	goto out_delete;
	105	} else if (mode == O_WRONLY) {
	106	/*
	107	* In O_RDONLY mode this will be performed when reading the
	108	* kernel MMAP event, in event__process_mmap().
	109	*/
	110	if (perf_session__create_kernel_maps(self) < 0)
	111	goto out_delete;
	112	}
d549c769	113
8dc58101	114	perf_session__update_sample_type(self);
94c744b6 ACM	115	out:
94c744b6 ACM	116	return self;
4aa65636	117	out_free:
94c744b6 ACM	118	free(self);
94c744b6 ACM	119	return NULL;
4aa65636 ACM	120	out_delete:
	121	perf_session__delete(self);
	122	return NULL;
94c744b6 ACM	123	}
	124
	125	void perf_session__delete(struct perf_session *self)
	126	{
	127	perf_header__exit(&self->header);
	128	close(self->fd);
ec913369	129	free(self->cwd);
94c744b6 ACM	130	free(self);
94c744b6 ACM	131	}
a328626b ACM	132
	133	static bool symbol__match_parent_regex(struct symbol *sym)
	134	{
	135	if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
	136	return 1;
	137
	138	return 0;
	139	}
	140
b3c9ac08 ACM	141	struct map_symbol perf_session__resolve_callchain(struct perf_session self,
	142	struct thread *thread,
	143	struct ip_callchain *chain,
	144	struct symbol **parent)
a328626b ACM	145	{
a328626b ACM	146	u8 cpumode = PERF_RECORD_MISC_USER;
a328626b	147	unsigned int i;
ad5b217b	148	struct map_symbol syms = calloc(chain->nr, sizeof(syms));
a328626b	149
ad5b217b ACM	150	if (!syms)
ad5b217b ACM	151	return NULL;
a328626b ACM	152
	153	for (i = 0; i < chain->nr; i++) {
	154	u64 ip = chain->ips[i];
	155	struct addr_location al;
	156
	157	if (ip >= PERF_CONTEXT_MAX) {
	158	switch (ip) {
	159	case PERF_CONTEXT_HV:
	160	cpumode = PERF_RECORD_MISC_HYPERVISOR; break;
	161	case PERF_CONTEXT_KERNEL:
	162	cpumode = PERF_RECORD_MISC_KERNEL; break;
	163	case PERF_CONTEXT_USER:
	164	cpumode = PERF_RECORD_MISC_USER; break;
	165	default:
	166	break;
	167	}
	168	continue;
	169	}
	170
a1645ce1	171	al.filtered = false;
a328626b	172	thread__find_addr_location(thread, self, cpumode,
a1645ce1	173	MAP__FUNCTION, thread->pid, ip, &al, NULL);
a328626b ACM	174	if (al.sym != NULL) {
	175	if (sort__has_parent && !*parent &&
	176	symbol__match_parent_regex(al.sym))
	177	*parent = al.sym;
d599db3f	178	if (!symbol_conf.use_callchain)
a328626b	179	break;
b3c9ac08 ACM	180	syms[i].map = al.map;
b3c9ac08 ACM	181	syms[i].sym = al.sym;
a328626b ACM	182	}
	183	}
	184
	185	return syms;
	186	}
06aae590 ACM	187
	188	static int process_event_stub(event_t *event __used,
	189	struct perf_session *session __used)
	190	{
	191	dump_printf(": unhandled!\n");
	192	return 0;
	193	}
	194
	195	static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
	196	{
55aa640f ACM	197	if (handler->sample == NULL)
	198	handler->sample = process_event_stub;
	199	if (handler->mmap == NULL)
	200	handler->mmap = process_event_stub;
	201	if (handler->comm == NULL)
	202	handler->comm = process_event_stub;
	203	if (handler->fork == NULL)
	204	handler->fork = process_event_stub;
	205	if (handler->exit == NULL)
	206	handler->exit = process_event_stub;
	207	if (handler->lost == NULL)
	208	handler->lost = process_event_stub;
	209	if (handler->read == NULL)
	210	handler->read = process_event_stub;
	211	if (handler->throttle == NULL)
	212	handler->throttle = process_event_stub;
	213	if (handler->unthrottle == NULL)
	214	handler->unthrottle = process_event_stub;
2c46dbb5 TZ	215	if (handler->attr == NULL)
2c46dbb5 TZ	216	handler->attr = process_event_stub;
cd19a035 TZ	217	if (handler->event_type == NULL)
cd19a035 TZ	218	handler->event_type = process_event_stub;
9215545e TZ	219	if (handler->tracing_data == NULL)
9215545e TZ	220	handler->tracing_data = process_event_stub;
c7929e47 TZ	221	if (handler->build_id == NULL)
c7929e47 TZ	222	handler->build_id = process_event_stub;
06aae590 ACM	223	}
	224
	225	static const char *event__name[] = {
	226	[0] = "TOTAL",
	227	[PERF_RECORD_MMAP] = "MMAP",
	228	[PERF_RECORD_LOST] = "LOST",
	229	[PERF_RECORD_COMM] = "COMM",
	230	[PERF_RECORD_EXIT] = "EXIT",
	231	[PERF_RECORD_THROTTLE] = "THROTTLE",
	232	[PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
	233	[PERF_RECORD_FORK] = "FORK",
	234	[PERF_RECORD_READ] = "READ",
	235	[PERF_RECORD_SAMPLE] = "SAMPLE",
2c46dbb5	236	[PERF_RECORD_HEADER_ATTR] = "ATTR",
cd19a035	237	[PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
9215545e	238	[PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
c7929e47	239	[PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
06aae590 ACM	240	};
06aae590 ACM	241
8dc58101	242	unsigned long event__total[PERF_RECORD_HEADER_MAX];
06aae590 ACM	243
	244	void event__print_totals(void)
	245	{
	246	int i;
8dc58101 TZ	247	for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) {
	248	if (!event__name[i])
	249	continue;
06aae590 ACM	250	pr_info("%10s events: %10ld\n",
06aae590 ACM	251	event__name[i], event__total[i]);
8dc58101	252	}
06aae590 ACM	253	}
06aae590 ACM	254
ba21594c ACM	255	void mem_bswap_64(void *src, int byte_size)
	256	{
	257	u64 *m = src;
	258
	259	while (byte_size > 0) {
	260	m = bswap_64(m);
	261	byte_size -= sizeof(u64);
	262	++m;
	263	}
	264	}
	265
	266	static void event__all64_swap(event_t *self)
	267	{
	268	struct perf_event_header *hdr = &self->header;
	269	mem_bswap_64(hdr + 1, self->header.size - sizeof(*hdr));
	270	}
	271
	272	static void event__comm_swap(event_t *self)
	273	{
	274	self->comm.pid = bswap_32(self->comm.pid);
	275	self->comm.tid = bswap_32(self->comm.tid);
	276	}
	277
	278	static void event__mmap_swap(event_t *self)
	279	{
	280	self->mmap.pid = bswap_32(self->mmap.pid);
	281	self->mmap.tid = bswap_32(self->mmap.tid);
	282	self->mmap.start = bswap_64(self->mmap.start);
	283	self->mmap.len = bswap_64(self->mmap.len);
	284	self->mmap.pgoff = bswap_64(self->mmap.pgoff);
	285	}
	286
	287	static void event__task_swap(event_t *self)
	288	{
	289	self->fork.pid = bswap_32(self->fork.pid);
	290	self->fork.tid = bswap_32(self->fork.tid);
	291	self->fork.ppid = bswap_32(self->fork.ppid);
	292	self->fork.ptid = bswap_32(self->fork.ptid);
	293	self->fork.time = bswap_64(self->fork.time);
	294	}
	295
	296	static void event__read_swap(event_t *self)
	297	{
	298	self->read.pid = bswap_32(self->read.pid);
	299	self->read.tid = bswap_32(self->read.tid);
	300	self->read.value = bswap_64(self->read.value);
	301	self->read.time_enabled = bswap_64(self->read.time_enabled);
	302	self->read.time_running = bswap_64(self->read.time_running);
	303	self->read.id = bswap_64(self->read.id);
	304	}
	305
2c46dbb5 TZ	306	static void event__attr_swap(event_t *self)
	307	{
	308	size_t size;
	309
	310	self->attr.attr.type = bswap_32(self->attr.attr.type);
	311	self->attr.attr.size = bswap_32(self->attr.attr.size);
	312	self->attr.attr.config = bswap_64(self->attr.attr.config);
	313	self->attr.attr.sample_period = bswap_64(self->attr.attr.sample_period);
	314	self->attr.attr.sample_type = bswap_64(self->attr.attr.sample_type);
	315	self->attr.attr.read_format = bswap_64(self->attr.attr.read_format);
	316	self->attr.attr.wakeup_events = bswap_32(self->attr.attr.wakeup_events);
	317	self->attr.attr.bp_type = bswap_32(self->attr.attr.bp_type);
	318	self->attr.attr.bp_addr = bswap_64(self->attr.attr.bp_addr);
	319	self->attr.attr.bp_len = bswap_64(self->attr.attr.bp_len);
	320
	321	size = self->header.size;
	322	size -= (void )&self->attr.id - (void )self;
	323	mem_bswap_64(self->attr.id, size);
	324	}
	325
cd19a035 TZ	326	static void event__event_type_swap(event_t *self)
	327	{
	328	self->event_type.event_type.event_id =
	329	bswap_64(self->event_type.event_type.event_id);
	330	}
	331
9215545e TZ	332	static void event__tracing_data_swap(event_t *self)
	333	{
	334	self->tracing_data.size = bswap_32(self->tracing_data.size);
	335	}
	336
ba21594c ACM	337	typedef void (event__swap_op)(event_t self);
	338
	339	static event__swap_op event__swap_ops[] = {
	340	[PERF_RECORD_MMAP] = event__mmap_swap,
	341	[PERF_RECORD_COMM] = event__comm_swap,
	342	[PERF_RECORD_FORK] = event__task_swap,
	343	[PERF_RECORD_EXIT] = event__task_swap,
	344	[PERF_RECORD_LOST] = event__all64_swap,
	345	[PERF_RECORD_READ] = event__read_swap,
	346	[PERF_RECORD_SAMPLE] = event__all64_swap,
2c46dbb5	347	[PERF_RECORD_HEADER_ATTR] = event__attr_swap,
cd19a035	348	[PERF_RECORD_HEADER_EVENT_TYPE] = event__event_type_swap,
9215545e	349	[PERF_RECORD_HEADER_TRACING_DATA] = event__tracing_data_swap,
c7929e47	350	[PERF_RECORD_HEADER_BUILD_ID] = NULL,
8dc58101	351	[PERF_RECORD_HEADER_MAX] = NULL,
ba21594c ACM	352	};
ba21594c ACM	353
06aae590 ACM	354	static int perf_session__process_event(struct perf_session *self,
	355	event_t *event,
	356	struct perf_event_ops *ops,
ba21594c	357	u64 offset, u64 head)
06aae590 ACM	358	{
	359	trace_event(event);
	360
8dc58101	361	if (event->header.type < PERF_RECORD_HEADER_MAX) {
ba21594c	362	dump_printf("%#Lx [%#x]: PERF_RECORD_%s",
0d755034	363	offset + head, event->header.size,
06aae590 ACM	364	event__name[event->header.type]);
	365	++event__total[0];
	366	++event__total[event->header.type];
	367	}
	368
ba21594c ACM	369	if (self->header.needs_swap && event__swap_ops[event->header.type])
	370	event__swap_ops[event->header.type](event);
	371
06aae590 ACM	372	switch (event->header.type) {
06aae590 ACM	373	case PERF_RECORD_SAMPLE:
55aa640f	374	return ops->sample(event, self);
06aae590	375	case PERF_RECORD_MMAP:
55aa640f	376	return ops->mmap(event, self);
06aae590	377	case PERF_RECORD_COMM:
55aa640f	378	return ops->comm(event, self);
06aae590	379	case PERF_RECORD_FORK:
55aa640f	380	return ops->fork(event, self);
06aae590	381	case PERF_RECORD_EXIT:
55aa640f	382	return ops->exit(event, self);
06aae590	383	case PERF_RECORD_LOST:
55aa640f	384	return ops->lost(event, self);
06aae590	385	case PERF_RECORD_READ:
55aa640f	386	return ops->read(event, self);
06aae590	387	case PERF_RECORD_THROTTLE:
55aa640f	388	return ops->throttle(event, self);
06aae590	389	case PERF_RECORD_UNTHROTTLE:
55aa640f	390	return ops->unthrottle(event, self);
2c46dbb5 TZ	391	case PERF_RECORD_HEADER_ATTR:
2c46dbb5 TZ	392	return ops->attr(event, self);
cd19a035 TZ	393	case PERF_RECORD_HEADER_EVENT_TYPE:
cd19a035 TZ	394	return ops->event_type(event, self);
9215545e TZ	395	case PERF_RECORD_HEADER_TRACING_DATA:
	396	/* setup for reading amidst mmap */
	397	lseek(self->fd, offset + head, SEEK_SET);
	398	return ops->tracing_data(event, self);
c7929e47 TZ	399	case PERF_RECORD_HEADER_BUILD_ID:
c7929e47 TZ	400	return ops->build_id(event, self);
06aae590	401	default:
31d337c4	402	self->unknown_events++;
06aae590 ACM	403	return -1;
	404	}
	405	}
	406
ba21594c ACM	407	void perf_event_header__bswap(struct perf_event_header *self)
	408	{
	409	self->type = bswap_32(self->type);
	410	self->misc = bswap_16(self->misc);
	411	self->size = bswap_16(self->size);
	412	}
	413
06aae590 ACM	414	static struct thread perf_session__register_idle_thread(struct perf_session self)
	415	{
	416	struct thread *thread = perf_session__findnew(self, 0);
	417
	418	if (thread == NULL \|\| thread__set_comm(thread, "swapper")) {
	419	pr_err("problem inserting idle task.\n");
	420	thread = NULL;
	421	}
	422
	423	return thread;
	424	}
	425
8dc58101 TZ	426	int do_read(int fd, void *buf, size_t size)
	427	{
	428	void *buf_start = buf;
	429
	430	while (size) {
	431	int ret = read(fd, buf, size);
	432
	433	if (ret <= 0)
	434	return ret;
	435
	436	size -= ret;
	437	buf += ret;
	438	}
	439
	440	return buf - buf_start;
	441	}
	442
	443	#define session_done() ((volatile int )(&session_done))
	444	volatile int session_done;
	445
	446	static int __perf_session__process_pipe_events(struct perf_session *self,
	447	struct perf_event_ops *ops)
	448	{
	449	event_t event;
	450	uint32_t size;
	451	int skip = 0;
	452	u64 head;
	453	int err;
	454	void *p;
	455
	456	perf_event_ops__fill_defaults(ops);
	457
	458	head = 0;
	459	more:
	460	err = do_read(self->fd, &event, sizeof(struct perf_event_header));
	461	if (err <= 0) {
	462	if (err == 0)
	463	goto done;
	464
	465	pr_err("failed to read event header\n");
	466	goto out_err;
	467	}
	468
	469	if (self->header.needs_swap)
	470	perf_event_header__bswap(&event.header);
	471
	472	size = event.header.size;
	473	if (size == 0)
	474	size = 8;
	475
	476	p = &event;
	477	p += sizeof(struct perf_event_header);
	478
	479	err = do_read(self->fd, p, size - sizeof(struct perf_event_header));
	480	if (err <= 0) {
	481	if (err == 0) {
	482	pr_err("unexpected end of event stream\n");
	483	goto done;
	484	}
	485
	486	pr_err("failed to read event data\n");
	487	goto out_err;
	488	}
	489
490	if (size == 0 \|\|
491	(skip = perf_session__process_event(self, &event, ops,
492	0, head)) < 0) {
493	dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n",
494	head, event.header.size, event.header.type);
495	/*
496	* assume we lost track of the stream, check alignment, and
497	* increment a single u64 in the hope to catch on again 'soon'.
498	*/
499	if (unlikely(head & 7))
500	head &= ~7ULL;
501
502	size = 8;
503	}
504
505	head += size;
506
507	dump_printf("\n%#Lx [%#x]: event: %d\n",
508	head, event.header.size, event.header.type);
509
510	if (skip > 0)
511	head += skip;
512
513	if (!session_done())
514	goto more;
515	done:
516	err = 0;
517	out_err:
518	return err;
519	}
520
6122e4e4 ACM	521	int __perf_session__process_events(struct perf_session *self,
	522	u64 data_offset, u64 data_size,
	523	u64 file_size, struct perf_event_ops *ops)
06aae590	524	{
ba21594c ACM	525	int err, mmap_prot, mmap_flags;
	526	u64 head, shift;
	527	u64 offset = 0;
06aae590 ACM	528	size_t page_size;
	529	event_t *event;
	530	uint32_t size;
	531	char *buf;
5f4d3f88 ACM	532	struct ui_progress *progress = ui_progress__new("Processing events...",
	533	self->size);
	534	if (progress == NULL)
	535	return -1;
06aae590	536
06aae590 ACM	537	perf_event_ops__fill_defaults(ops);
06aae590 ACM	538
1b75962e	539	page_size = sysconf(_SC_PAGESIZE);
06aae590	540
6122e4e4	541	head = data_offset;
06aae590 ACM	542	shift = page_size * (head / page_size);
	543	offset += shift;
	544	head -= shift;
	545
ba21594c ACM	546	mmap_prot = PROT_READ;
	547	mmap_flags = MAP_SHARED;
	548
	549	if (self->header.needs_swap) {
	550	mmap_prot \|= PROT_WRITE;
	551	mmap_flags = MAP_PRIVATE;
	552	}
06aae590	553	remap:
ba21594c ACM	554	buf = mmap(NULL, page_size * self->mmap_window, mmap_prot,
ba21594c ACM	555	mmap_flags, self->fd, offset);
06aae590 ACM	556	if (buf == MAP_FAILED) {
	557	pr_err("failed to mmap file\n");
	558	err = -errno;
	559	goto out_err;
	560	}
	561
	562	more:
	563	event = (event_t *)(buf + head);
5f4d3f88	564	ui_progress__update(progress, offset);
06aae590	565
ba21594c ACM	566	if (self->header.needs_swap)
ba21594c ACM	567	perf_event_header__bswap(&event->header);
06aae590 ACM	568	size = event->header.size;
	569	if (size == 0)
	570	size = 8;
	571
	572	if (head + event->header.size >= page_size * self->mmap_window) {
	573	int munmap_ret;
	574
	575	shift = page_size * (head / page_size);
	576
	577	munmap_ret = munmap(buf, page_size * self->mmap_window);
	578	assert(munmap_ret == 0);
	579
	580	offset += shift;
	581	head -= shift;
	582	goto remap;
	583	}
	584
	585	size = event->header.size;
	586
ba21594c	587	dump_printf("\n%#Lx [%#x]: event: %d\n",
0d755034	588	offset + head, event->header.size, event->header.type);
06aae590 ACM	589
	590	if (size == 0 \|\|
	591	perf_session__process_event(self, event, ops, offset, head) < 0) {
ba21594c	592	dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n",
0d755034	593	offset + head, event->header.size,
06aae590 ACM	594	event->header.type);
	595	/*
	596	* assume we lost track of the stream, check alignment, and
	597	* increment a single u64 in the hope to catch on again 'soon'.
	598	*/
	599	if (unlikely(head & 7))
	600	head &= ~7ULL;
	601
	602	size = 8;
	603	}
	604
	605	head += size;
	606
6122e4e4	607	if (offset + head >= data_offset + data_size)
06aae590 ACM	608	goto done;
06aae590 ACM	609
6122e4e4	610	if (offset + head < file_size)
06aae590 ACM	611	goto more;
	612	done:
	613	err = 0;
	614	out_err:
5f4d3f88	615	ui_progress__delete(progress);
06aae590 ACM	616	return err;
06aae590 ACM	617	}
27295592	618
6122e4e4 ACM	619	int perf_session__process_events(struct perf_session *self,
	620	struct perf_event_ops *ops)
	621	{
	622	int err;
	623
	624	if (perf_session__register_idle_thread(self) == NULL)
	625	return -ENOMEM;
	626
	627	if (!symbol_conf.full_paths) {
	628	char bf[PATH_MAX];
	629
	630	if (getcwd(bf, sizeof(bf)) == NULL) {
	631	err = -errno;
	632	out_getcwd_err:
	633	pr_err("failed to get the current directory\n");
	634	goto out_err;
	635	}
	636	self->cwd = strdup(bf);
	637	if (self->cwd == NULL) {
	638	err = -ENOMEM;
	639	goto out_getcwd_err;
	640	}
	641	self->cwdlen = strlen(self->cwd);
	642	}
	643
8dc58101 TZ	644	if (!self->fd_pipe)
	645	err = __perf_session__process_events(self,
	646	self->header.data_offset,
	647	self->header.data_size,
	648	self->size, ops);
	649	else
	650	err = __perf_session__process_pipe_events(self, ops);
6122e4e4 ACM	651	out_err:
	652	return err;
	653	}
	654
d549c769	655	bool perf_session__has_traces(struct perf_session self, const char msg)
27295592 ACM	656	{
27295592 ACM	657	if (!(self->sample_type & PERF_SAMPLE_RAW)) {
d549c769 ACM	658	pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
d549c769 ACM	659	return false;
27295592 ACM	660	}
27295592 ACM	661
d549c769	662	return true;
27295592	663	}
56b03f3c	664
a1645ce1	665	int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps,
56b03f3c ACM	666	const char *symbol_name,
	667	u64 addr)
	668	{
	669	char *bracket;
9de89fe7	670	enum map_type i;
a1645ce1 ZY	671	struct ref_reloc_sym *ref;
	672
	673	ref = zalloc(sizeof(struct ref_reloc_sym));
	674	if (ref == NULL)
	675	return -ENOMEM;
56b03f3c	676
a1645ce1 ZY	677	ref->name = strdup(symbol_name);
	678	if (ref->name == NULL) {
	679	free(ref);
56b03f3c	680	return -ENOMEM;
a1645ce1	681	}
56b03f3c	682
a1645ce1	683	bracket = strchr(ref->name, ']');
56b03f3c ACM	684	if (bracket)
	685	*bracket = '\0';
	686
a1645ce1	687	ref->addr = addr;
9de89fe7 ACM	688
9de89fe7 ACM	689	for (i = 0; i < MAP__NR_TYPES; ++i) {
a1645ce1 ZY	690	struct kmap *kmap = map__kmap(maps[i]);
a1645ce1 ZY	691	kmap->ref_reloc_sym = ref;
9de89fe7 ACM	692	}
9de89fe7 ACM	693
56b03f3c ACM	694	return 0;
56b03f3c ACM	695	}