perf/core improvements and fixes:

Fixes:
 
 . Fix inverted error verification bug in thread__fork, from David Ahern.
 
 New features:
 
 . Shell completion for 'perf kvm', from Ramkumar Ramachandra.
 
 Refactorings:
 
 . Get rid of panic() like calls in libtraceevent, from Namyung Kim.
 
 . Start carving out symbol parsing routines from perf, just moving routines to
   topic files in tools/lib/symbol/, tools that want to use it need to integrate
   it directly, i.e. no tools/lib/symbol/Makefile is provided.
 
 . Assorted refactoring patches, moving code around and adding
   utility evlist methods that will be used in the IPT patchset,
   from Adrian Hunter.
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.15 (GNU/Linux)
 
 iQIcBAABAgAGBQJSqyG1AAoJENZQFvNTUqpAj7kP/iPHuiuHbnribVE9ehM5stPN
 SqzOjRGYxEoz7hKGY5ot7CpkcGheUFe2fwRPyiMoS+GmzNJu9JYFxHzlNB907UqY
 EN5eLEpHHIYKkRd7wBWRsR4xnARYK1n2t0poXa8dJ1V0+wZ23ku/LBILVpIO1anf
 YqnzH0Uzi2GIJ0oWbQT6yggC07qz1Ma3QPJdoZ/0NkmWVKzQbre5KR6M8bnv6nXQ
 XHm6v9irFCbNYtXvv7NpLua99aiKpaJOT8s1x8HfAgFO0X071tGM+OjONWDQdUfD
 QBGYXzGWtIC5dXo+1PcK6BFz80CqgPSRG7zaIXjykapFLCoQOGPkdex2UMuAeOKF
 N5Be2z17FXSFSDPsopAWOcmdQ5vu2m6qzqYbOmhSMzuhrXCI/ly7Kd8mfMIL70q0
 rR3e87mRmb3/Jx8WaMw6er5l1ceVXT72cFTP1GulIO7cyhwoxvUhPv35D+8F5qWI
 ou0cVKXRdZYb/tVbeUTXo1nqAmOi5s5Fsm4W/7pOtouaVo/K/9tEIusKpNjtVWPz
 PeE4ggzZNMn/Y6nU2WRfXAK0ScqS2mc8YiNqg9+SWaffBTEWBZNDph9ajhTtIDXq
 eLDe0DRNCvVJtRKOQfuiuO8vhXF6w/JdZVEMFGHJ9jn601XR3Sgm+ktK29AFiwgZ
 a0rk8IreC6Ylg/wlKX0H
 =qcLZ
 -----END PGP SIGNATURE-----

Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

Fixes:

  * Fix inverted error verification bug in thread__fork, from David Ahern.

New features:

  * Shell completion for 'perf kvm', from Ramkumar Ramachandra.

Refactorings:

  * Get rid of panic() like calls in libtraceevent, from Namyung Kim.

  * Start carving out symbol parsing routines from perf, just moving routines to
    topic files in tools/lib/symbol/, tools that want to use it need to integrate
    it directly, i.e. no tools/lib/symbol/Makefile is provided.

  * Assorted refactoring patches, moving code around and adding
    utility evlist methods that will be used in the IPT patchset,
    from Adrian Hunter.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2013-12-16 14:52:03 +01:00
commit b283d2f3b7
21 changed files with 550 additions and 303 deletions

View File

@ -0,0 +1,58 @@
#include "symbol/kallsyms.h"
#include <stdio.h>
#include <stdlib.h>
int kallsyms__parse(const char *filename, void *arg,
int (*process_symbol)(void *arg, const char *name,
char type, u64 start))
{
char *line = NULL;
size_t n;
int err = -1;
FILE *file = fopen(filename, "r");
if (file == NULL)
goto out_failure;
err = 0;
while (!feof(file)) {
u64 start;
int line_len, len;
char symbol_type;
char *symbol_name;
line_len = getline(&line, &n, file);
if (line_len < 0 || !line)
break;
line[--line_len] = '\0'; /* \n */
len = hex2u64(line, &start);
len++;
if (len + 2 >= line_len)
continue;
symbol_type = line[len];
len += 2;
symbol_name = line + len;
len = line_len - len;
if (len >= KSYM_NAME_LEN) {
err = -1;
break;
}
err = process_symbol(arg, symbol_name, symbol_type, start);
if (err)
break;
}
free(line);
fclose(file);
return err;
out_failure:
return -1;
}

View File

@ -0,0 +1,24 @@
#ifndef __TOOLS_KALLSYMS_H_
#define __TOOLS_KALLSYMS_H_ 1
#include <elf.h>
#include <linux/ctype.h>
#include <linux/types.h>
#ifndef KSYM_NAME_LEN
#define KSYM_NAME_LEN 256
#endif
static inline u8 kallsyms2elf_type(char type)
{
if (type == 'W')
return STB_WEAK;
return isupper(type) ? STB_GLOBAL : STB_LOCAL;
}
int kallsyms__parse(const char *filename, void *arg,
int (*process_symbol)(void *arg, const char *name,
char type, u64 start));
#endif /* __TOOLS_KALLSYMS_H_ */

View File

@ -356,12 +356,35 @@ enum pevent_flag {
_PE(READ_FORMAT_FAILED, "failed to read event format"), \
_PE(READ_PRINT_FAILED, "failed to read event print fmt"), \
_PE(OLD_FTRACE_ARG_FAILED,"failed to allocate field name for ftrace"),\
_PE(INVALID_ARG_TYPE, "invalid argument type")
_PE(INVALID_ARG_TYPE, "invalid argument type"), \
_PE(INVALID_EXP_TYPE, "invalid expression type"), \
_PE(INVALID_OP_TYPE, "invalid operator type"), \
_PE(INVALID_EVENT_NAME, "invalid event name"), \
_PE(EVENT_NOT_FOUND, "no event found"), \
_PE(SYNTAX_ERROR, "syntax error"), \
_PE(ILLEGAL_RVALUE, "illegal rvalue"), \
_PE(ILLEGAL_LVALUE, "illegal lvalue for string comparison"), \
_PE(INVALID_REGEX, "regex did not compute"), \
_PE(ILLEGAL_STRING_CMP, "illegal comparison for string"), \
_PE(ILLEGAL_INTEGER_CMP,"illegal comparison for integer"), \
_PE(REPARENT_NOT_OP, "cannot reparent other than OP"), \
_PE(REPARENT_FAILED, "failed to reparent filter OP"), \
_PE(BAD_FILTER_ARG, "bad arg in filter tree"), \
_PE(UNEXPECTED_TYPE, "unexpected type (not a value)"), \
_PE(ILLEGAL_TOKEN, "illegal token"), \
_PE(INVALID_PAREN, "open parenthesis cannot come here"), \
_PE(UNBALANCED_PAREN, "unbalanced number of parenthesis"), \
_PE(UNKNOWN_TOKEN, "unknown token"), \
_PE(FILTER_NOT_FOUND, "no filter found"), \
_PE(NOT_A_NUMBER, "must have number field"), \
_PE(NO_FILTER, "no filters exists"), \
_PE(FILTER_MISS, "record does not match to filter")
#undef _PE
#define _PE(__code, __str) PEVENT_ERRNO__ ## __code
enum pevent_errno {
PEVENT_ERRNO__SUCCESS = 0,
PEVENT_ERRNO__FILTER_MATCH = PEVENT_ERRNO__SUCCESS,
/*
* Choose an arbitrary negative big number not to clash with standard
@ -836,10 +859,11 @@ struct event_filter {
struct event_filter *pevent_filter_alloc(struct pevent *pevent);
#define FILTER_NONE -2
#define FILTER_NOEXIST -1
#define FILTER_MISS 0
#define FILTER_MATCH 1
/* for backward compatibility */
#define FILTER_NONE PEVENT_ERRNO__FILTER_NOT_FOUND
#define FILTER_NOEXIST PEVENT_ERRNO__NO_FILTER
#define FILTER_MISS PEVENT_ERRNO__FILTER_MISS
#define FILTER_MATCH PEVENT_ERRNO__FILTER_MATCH
enum filter_trivial_type {
FILTER_TRIVIAL_FALSE,
@ -847,13 +871,12 @@ enum filter_trivial_type {
FILTER_TRIVIAL_BOTH,
};
int pevent_filter_add_filter_str(struct event_filter *filter,
const char *filter_str,
char **error_str);
enum pevent_errno pevent_filter_add_filter_str(struct event_filter *filter,
const char *filter_str);
int pevent_filter_match(struct event_filter *filter,
struct pevent_record *record);
enum pevent_errno pevent_filter_match(struct event_filter *filter,
struct pevent_record *record);
int pevent_event_filtered(struct event_filter *filter,
int event_id);

File diff suppressed because it is too large Load Diff

View File

@ -2,6 +2,8 @@ tools/perf
tools/scripts
tools/lib/traceevent
tools/lib/lk
tools/lib/symbol/kallsyms.c
tools/lib/symbol/kallsyms.h
include/linux/const.h
include/linux/perf_event.h
include/linux/rbtree.h

View File

@ -202,6 +202,7 @@ $(OUTPUT)util/pmu.o: $(OUTPUT)util/pmu-flex.c $(OUTPUT)util/pmu-bison.c
LIB_FILE=$(OUTPUT)libperf.a
LIB_H += ../lib/symbol/kallsyms.h
LIB_H += ../../include/uapi/linux/perf_event.h
LIB_H += ../../include/linux/rbtree.h
LIB_H += ../../include/linux/list.h
@ -312,6 +313,7 @@ LIB_OBJS += $(OUTPUT)util/evlist.o
LIB_OBJS += $(OUTPUT)util/evsel.o
LIB_OBJS += $(OUTPUT)util/exec_cmd.o
LIB_OBJS += $(OUTPUT)util/help.o
LIB_OBJS += $(OUTPUT)util/kallsyms.o
LIB_OBJS += $(OUTPUT)util/levenshtein.o
LIB_OBJS += $(OUTPUT)util/parse-options.o
LIB_OBJS += $(OUTPUT)util/parse-events.o
@ -672,6 +674,9 @@ $(OUTPUT)ui/browsers/map.o: ui/browsers/map.c $(OUTPUT)PERF-CFLAGS
$(OUTPUT)ui/browsers/scripts.o: ui/browsers/scripts.c $(OUTPUT)PERF-CFLAGS
$(QUIET_CC)$(CC) -o $@ -c $(CFLAGS) -DENABLE_SLFUTURE_CONST $<
$(OUTPUT)util/kallsyms.o: ../lib/symbol/kallsyms.c $(OUTPUT)PERF-CFLAGS
$(QUIET_CC)$(CC) -o $@ -c $(CFLAGS) $<
$(OUTPUT)util/rbtree.o: ../../lib/rbtree.c $(OUTPUT)PERF-CFLAGS
$(QUIET_CC)$(CC) -o $@ -c $(CFLAGS) -Wno-unused-parameter -DETC_PERFCONFIG='"$(ETC_PERFCONFIG_SQ)"' $<

View File

@ -121,6 +121,10 @@ __perf_main ()
elif [[ $prev == "-e" && "${words[1]}" == @(record|stat|top) ]]; then
evts=$($cmd list --raw-dump)
__perfcomp_colon "$evts" "$cur"
# List subcommands for 'perf kvm'
elif [[ $prev == "kvm" ]]; then
subcmds="top record report diff buildid-list stat"
__perfcomp_colon "$subcmds" "$cur"
# List long option names
elif [[ $cur == --* ]]; then
subcmd=${words[1]}

View File

@ -7,6 +7,7 @@
#include "strlist.h"
#include "thread.h"
#include "thread_map.h"
#include "symbol/kallsyms.h"
static const char *perf_event__names[] = {
[0] = "TOTAL",

View File

@ -1191,8 +1191,7 @@ int perf_evlist__strerror_open(struct perf_evlist *evlist __maybe_unused,
"Error:\t%s.\n"
"Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg);
if (filename__read_int("/proc/sys/kernel/perf_event_paranoid", &value))
break;
value = perf_event_paranoid();
printed += scnprintf(buf + printed, size - printed, "\nHint:\t");
@ -1213,3 +1212,20 @@ int perf_evlist__strerror_open(struct perf_evlist *evlist __maybe_unused,
return 0;
}
void perf_evlist__to_front(struct perf_evlist *evlist,
struct perf_evsel *move_evsel)
{
struct perf_evsel *evsel, *n;
LIST_HEAD(move);
if (move_evsel == perf_evlist__first(evlist))
return;
list_for_each_entry_safe(evsel, n, &evlist->entries, node) {
if (evsel->leader == move_evsel->leader)
list_move_tail(&evsel->node, &move);
}
list_splice(&move, &evlist->entries);
}

View File

@ -193,4 +193,9 @@ static inline void perf_mmap__write_tail(struct perf_mmap *md,
pc->data_tail = tail;
}
bool perf_evlist__can_select_event(struct perf_evlist *evlist, const char *str);
void perf_evlist__to_front(struct perf_evlist *evlist,
struct perf_evsel *move_evsel);
#endif /* __PERF_EVLIST_H */

View File

@ -2327,7 +2327,8 @@ int perf_session__write_header(struct perf_session *session,
}
}
header->data_offset = lseek(fd, 0, SEEK_CUR);
if (!header->data_offset)
header->data_offset = lseek(fd, 0, SEEK_CUR);
header->feat_offset = header->data_offset + header->data_size;
if (at_exit) {

View File

@ -9,6 +9,7 @@
#include "strlist.h"
#include "thread.h"
#include <stdbool.h>
#include <symbol/kallsyms.h>
#include "unwind.h"
int machine__init(struct machine *machine, const char *root_dir, pid_t pid)

View File

@ -177,3 +177,40 @@ int perf_record_opts__config(struct perf_record_opts *opts)
{
return perf_record_opts__config_freq(opts);
}
bool perf_evlist__can_select_event(struct perf_evlist *evlist, const char *str)
{
struct perf_evlist *temp_evlist;
struct perf_evsel *evsel;
int err, fd, cpu;
bool ret = false;
temp_evlist = perf_evlist__new();
if (!temp_evlist)
return false;
err = parse_events(temp_evlist, str);
if (err)
goto out_delete;
evsel = perf_evlist__last(temp_evlist);
if (!evlist || cpu_map__empty(evlist->cpus)) {
struct cpu_map *cpus = cpu_map__new(NULL);
cpu = cpus ? cpus->map[0] : 0;
cpu_map__delete(cpus);
} else {
cpu = evlist->cpus->map[0];
}
fd = sys_perf_event_open(&evsel->attr, -1, cpu, -1, 0);
if (fd >= 0) {
close(fd);
ret = true;
}
out_delete:
perf_evlist__delete(temp_evlist);
return ret;
}

View File

@ -247,27 +247,6 @@ void perf_tool__fill_defaults(struct perf_tool *tool)
}
}
void mem_bswap_32(void *src, int byte_size)
{
u32 *m = src;
while (byte_size > 0) {
*m = bswap_32(*m);
byte_size -= sizeof(u32);
++m;
}
}
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 swap_sample_id_all(union perf_event *event, void *data)
{
void *end = (void *) event + event->header.size;

View File

@ -74,8 +74,6 @@ int perf_session__resolve_callchain(struct perf_session *session,
bool perf_session__has_traces(struct perf_session *session, const char *msg);
void mem_bswap_64(void *src, int byte_size);
void mem_bswap_32(void *src, int byte_size);
void perf_event__attr_swap(struct perf_event_attr *attr);
int perf_session__create_kernel_maps(struct perf_session *session);

View File

@ -6,6 +6,7 @@
#include <inttypes.h>
#include "symbol.h"
#include <symbol/kallsyms.h>
#include "debug.h"
#ifndef HAVE_ELF_GETPHDRNUM_SUPPORT

View File

@ -18,12 +18,9 @@
#include <elf.h>
#include <limits.h>
#include <symbol/kallsyms.h>
#include <sys/utsname.h>
#ifndef KSYM_NAME_LEN
#define KSYM_NAME_LEN 256
#endif
static int dso__load_kernel_sym(struct dso *dso, struct map *map,
symbol_filter_t filter);
static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map,
@ -446,62 +443,6 @@ size_t dso__fprintf_symbols_by_name(struct dso *dso,
return ret;
}
int kallsyms__parse(const char *filename, void *arg,
int (*process_symbol)(void *arg, const char *name,
char type, u64 start))
{
char *line = NULL;
size_t n;
int err = -1;
FILE *file = fopen(filename, "r");
if (file == NULL)
goto out_failure;
err = 0;
while (!feof(file)) {
u64 start;
int line_len, len;
char symbol_type;
char *symbol_name;
line_len = getline(&line, &n, file);
if (line_len < 0 || !line)
break;
line[--line_len] = '\0'; /* \n */
len = hex2u64(line, &start);
len++;
if (len + 2 >= line_len)
continue;
symbol_type = line[len];
len += 2;
symbol_name = line + len;
len = line_len - len;
if (len >= KSYM_NAME_LEN) {
err = -1;
break;
}
err = process_symbol(arg, symbol_name,
symbol_type, start);
if (err)
break;
}
free(line);
fclose(file);
return err;
out_failure:
return -1;
}
int modules__parse(const char *filename, void *arg,
int (*process_module)(void *arg, const char *name,
u64 start))
@ -565,14 +506,6 @@ struct process_kallsyms_args {
struct dso *dso;
};
static u8 kallsyms2elf_type(char type)
{
if (type == 'W')
return STB_WEAK;
return isupper(type) ? STB_GLOBAL : STB_LOCAL;
}
bool symbol__is_idle(struct symbol *sym)
{
const char * const idle_symbols[] = {

View File

@ -221,9 +221,6 @@ struct symbol *dso__first_symbol(struct dso *dso, enum map_type type);
int filename__read_build_id(const char *filename, void *bf, size_t size);
int sysfs__read_build_id(const char *filename, void *bf, size_t size);
int kallsyms__parse(const char *filename, void *arg,
int (*process_symbol)(void *arg, const char *name,
char type, u64 start));
int modules__parse(const char *filename, void *arg,
int (*process_module)(void *arg, const char *name,
u64 start));

View File

@ -126,7 +126,7 @@ int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp)
if (!comm)
return -ENOMEM;
err = thread__set_comm(thread, comm, timestamp);
if (!err)
if (err)
return err;
thread->comm_set = true;
}

View File

@ -1,5 +1,6 @@
#include "../perf.h"
#include "util.h"
#include "fs.h"
#include <sys/mman.h>
#ifdef HAVE_BACKTRACE_SUPPORT
#include <execinfo.h>
@ -8,6 +9,8 @@
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <byteswap.h>
#include <linux/kernel.h>
/*
@ -496,3 +499,41 @@ const char *get_filename_for_perf_kvm(void)
return filename;
}
int perf_event_paranoid(void)
{
char path[PATH_MAX];
const char *procfs = procfs__mountpoint();
int value;
if (!procfs)
return INT_MAX;
scnprintf(path, PATH_MAX, "%s/sys/kernel/perf_event_paranoid", procfs);
if (filename__read_int(path, &value))
return INT_MAX;
return value;
}
void mem_bswap_32(void *src, int byte_size)
{
u32 *m = src;
while (byte_size > 0) {
*m = bswap_32(*m);
byte_size -= sizeof(u32);
++m;
}
}
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;
}
}

View File

@ -321,6 +321,10 @@ void free_srcline(char *srcline);
int filename__read_int(const char *filename, int *value);
int filename__read_str(const char *filename, char **buf, size_t *sizep);
int perf_event_paranoid(void);
void mem_bswap_64(void *src, int byte_size);
void mem_bswap_32(void *src, int byte_size);
const char *get_filename_for_perf_kvm(void);
#endif /* GIT_COMPAT_UTIL_H */