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tools lib symbol: Start carving out symbol parsing routines from perf

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Eventually this should be useful to other tools/ living utilities.

For now don't try to build any .a, just trying the minimal approach of
separating existing code into multiple .c files that can then be
included wherever they are needed, using whatever build machinery
already in place.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-pfa8i5zpf4bf9rcccryi0lt3@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2013-12-11 09:15:00 -03:00
parent c7f2e3cd6c
commit c506c96b61
9 changed files with 93 additions and 71 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

58
tools/lib/symbol/kallsyms.c Normal file
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;
}

24
tools/lib/symbol/kallsyms.h Normal file
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_ */

2
tools/perf/MANIFEST
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

5
tools/perf/Makefile.perf
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)"' $<

1
tools/perf/util/event.c
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",

1
tools/perf/util/machine.c
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)

1
tools/perf/util/symbol-elf.c
View file

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

69
tools/perf/util/symbol.c
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[] = {

3
tools/perf/util/symbol.h
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));