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perf annotate: Support source line numbers in annotate

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With srcline key/sort'ing it's useful to have line numbers in the
annotate window. This patch implements this.

Use objdump -l to request the line numbers and save them in the line
structure. Then the browser displays them for source lines.

The line numbers are not displayed by default, but can be toggled on
with 'k'

There is one unfortunate problem with this setup. For lines not
containing source and which are outside functions objdump -l reports
line numbers off by a few: it always reports the first line number in
the next function even for lines that are outside the function.

I haven't found a nice way to detect/correct this. Probably objdump has
to be fixed.

See https://sourceware.org/bugzilla/show_bug.cgi?id=16433

The line numbers are still useful even with these problems, as most are
correct and the ones which are not are nearby.

v2: Fix help text. Handle (discriminator...) output in objdump.
Left align the line numbers.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1415844328-4884-9-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen 2014-11-12 18:05:26 -08:00 committed by Arnaldo Carvalho de Melo
parent 2de217688e
commit e592488c01
3 changed files with 38 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
tools/perf/ui/browsers/annotate.c
View File

@ -27,6 +27,7 @@ static struct annotate_browser_opt {
bool hide_src_code,
use_offset,
jump_arrows,
show_linenr,
show_nr_jumps;
} annotate_browser__opts = {
.use_offset = true,
@ -128,7 +129,11 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
if (!*dl->line)
slsmg_write_nstring(" ", width - pcnt_width);
else if (dl->offset == -1) {
printed = scnprintf(bf, sizeof(bf), "%*s ",
if (dl->line_nr && annotate_browser__opts.show_linenr)
printed = scnprintf(bf, sizeof(bf), "%-*d ",
ab->addr_width + 1, dl->line_nr);
else
printed = scnprintf(bf, sizeof(bf), "%*s ",
ab->addr_width, " ");
slsmg_write_nstring(bf, printed);
slsmg_write_nstring(dl->line, width - printed - pcnt_width + 1);
@ -733,6 +738,7 @@ static int annotate_browser__run(struct annotate_browser *browser,
"o Toggle disassembler output/simplified view\n"
"s Toggle source code view\n"
"/ Search string\n"
"k Toggle line numbers\n"
"r Run available scripts\n"
"? Search string backwards\n");
continue;
@ -741,6 +747,10 @@ static int annotate_browser__run(struct annotate_browser *browser,
script_browse(NULL);
continue;
}
case 'k':
annotate_browser__opts.show_linenr =
!annotate_browser__opts.show_linenr;
break;
case 'H':
nd = browser->curr_hot;
break;
@ -984,6 +994,7 @@ static struct annotate_config {
} annotate__configs[] = {
ANNOTATE_CFG(hide_src_code),
ANNOTATE_CFG(jump_arrows),
ANNOTATE_CFG(show_linenr),
ANNOTATE_CFG(show_nr_jumps),
ANNOTATE_CFG(use_offset),
};

30
tools/perf/util/annotate.c
View File

@ -17,11 +17,13 @@
#include "debug.h"
#include "annotate.h"
#include "evsel.h"
#include <regex.h>
#include <pthread.h>
#include <linux/bitops.h>
const char *disassembler_style;
const char *objdump_path;
static regex_t file_lineno;
static struct ins *ins__find(const char *name);
static int disasm_line__parse(char *line, char **namep, char **rawp);
@ -570,13 +572,15 @@ out_free_name:
return -1;
}
static struct disasm_line *disasm_line__new(s64 offset, char *line, size_t privsize)
static struct disasm_line *disasm_line__new(s64 offset, char *line,
size_t privsize, int line_nr)
{
struct disasm_line *dl = zalloc(sizeof(*dl) + privsize);
if (dl != NULL) {
dl->offset = offset;
dl->line = strdup(line);
dl->line_nr = line_nr;
if (dl->line == NULL)
goto out_delete;
@ -788,13 +792,15 @@ static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 st
* The ops.raw part will be parsed further according to type of the instruction.
*/
static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
FILE *file, size_t privsize)
FILE *file, size_t privsize,
int *line_nr)
{
struct annotation *notes = symbol__annotation(sym);
struct disasm_line *dl;
char *line = NULL, *parsed_line, *tmp, *tmp2, *c;
size_t line_len;
s64 line_ip, offset = -1;
regmatch_t match[2];
if (getline(&line, &line_len, file) < 0)
return -1;
@ -812,6 +818,12 @@ static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
line_ip = -1;
parsed_line = line;
/* /filename:linenr ? Save line number and ignore. */
if (regexec(&file_lineno, line, 2, match, 0) == 0) {
*line_nr = atoi(line + match[1].rm_so);
return 0;
}
/*
* Strip leading spaces:
*/
@ -842,8 +854,9 @@ static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
parsed_line = tmp2 + 1;
}
dl = disasm_line__new(offset, parsed_line, privsize);
dl = disasm_line__new(offset, parsed_line, privsize, *line_nr);
free(line);
(*line_nr)++;
if (dl == NULL)
return -1;
@ -869,6 +882,11 @@ static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
return 0;
}
static __attribute__((constructor)) void symbol__init_regexpr(void)
{
regcomp(&file_lineno, "^/[^:]+:([0-9]+)", REG_EXTENDED);
}
static void delete_last_nop(struct symbol *sym)
{
struct annotation *notes = symbol__annotation(sym);
@ -904,6 +922,7 @@ int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize)
char symfs_filename[PATH_MAX];
struct kcore_extract kce;
bool delete_extract = false;
int lineno = 0;
if (filename)
symbol__join_symfs(symfs_filename, filename);
@ -984,7 +1003,7 @@ fallback:
snprintf(command, sizeof(command),
"%s %s%s --start-address=0x%016" PRIx64
" --stop-address=0x%016" PRIx64
" -d %s %s -C %s 2>/dev/null|grep -v %s|expand",
" -l -d %s %s -C %s 2>/dev/null|grep -v %s|expand",
objdump_path ? objdump_path : "objdump",
disassembler_style ? "-M " : "",
disassembler_style ? disassembler_style : "",
@ -1001,7 +1020,8 @@ fallback:
goto out_free_filename;
while (!feof(file))
if (symbol__parse_objdump_line(sym, map, file, privsize) < 0)
if (symbol__parse_objdump_line(sym, map, file, privsize,
&lineno) < 0)
break;
/*

1
tools/perf/util/annotate.h
View File

@ -58,6 +58,7 @@ struct disasm_line {
char *line;
char *name;
struct ins *ins;
int line_nr;
struct ins_operands ops;
};