[PATCH] perf annotate: show full source location with 'l' hotkey

From: Martin Liska
Date: Mon Feb 15 2021 - 06:34:46 EST

Right now, when Line numbers are displayed, one can't easily
find a source file that the line corresponds to.

When a source line is selected and 'l' is pressed, full source file
location is displayed in perf UI footer line. The hotkey works
only for source code lines.

Signed-off-by: Martin Liška <mliska@xxxxxxx>
---
tools/perf/ui/browsers/annotate.c | 25 +++++++++++++++++++++++--
tools/perf/util/annotate.c | 12 ++++++++++--
tools/perf/util/annotate.h | 2 ++
3 files changed, 35 insertions(+), 4 deletions(-)

diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index bd77825fd5a1..cf60ba59b903 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -381,6 +381,25 @@ static bool annotate_browser__toggle_source(struct annotate_browser *browser)
return true;
}

+#define SYM_TITLE_MAX_SIZE (PATH_MAX + 64)
+
+static void annotate_browser__show_full_location(struct ui_browser *browser)
+{
+ struct annotate_browser *ab = container_of(browser, struct annotate_browser, b);
+ struct disasm_line *cursor = disasm_line(ab->selection);
+ struct annotation_line *al = &cursor->al;
+
+ if (al->offset != -1)
+ ui_helpline__puts("Only available for source code lines.");
+ else if (al->fileloc == NULL)
+ ui_helpline__puts("No source file location.");
+ else {
+ char help_line[SYM_TITLE_MAX_SIZE];
+ sprintf (help_line, "Source file location: %s", al->fileloc);
+ ui_helpline__puts(help_line);
+ }
+}
+
static void ui_browser__init_asm_mode(struct ui_browser *browser)
{
struct annotation *notes = browser__annotation(browser);
@@ -388,8 +407,6 @@ static void ui_browser__init_asm_mode(struct ui_browser *browser)
browser->nr_entries = notes->nr_asm_entries;
}

-#define SYM_TITLE_MAX_SIZE (PATH_MAX + 64)
-
static int sym_title(struct symbol *sym, struct map *map, char *title,
size_t sz, int percent_type)
{
@@ -747,6 +764,7 @@ static int annotate_browser__run(struct annotate_browser *browser,
"c Show min/max cycle\n"
"/ Search string\n"
"k Toggle line numbers\n"
+ "l Show full source file location\n"
"P Print to [symbol_name].annotation file.\n"
"r Run available scripts\n"
"p Toggle percent type [local/global]\n"
@@ -760,6 +778,9 @@ static int annotate_browser__run(struct annotate_browser *browser,
case 'k':
notes->options->show_linenr = !notes->options->show_linenr;
break;
+ case 'l':
+ annotate_browser__show_full_location (&browser->b);
+ continue;
case 'H':
nd = browser->curr_hot;
break;
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index e3eae646be3e..e4b0c21362d8 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1159,6 +1159,7 @@ struct annotate_args {
s64 offset;
char *line;
int line_nr;
+ char *fileloc;
};

static void annotation_line__init(struct annotation_line *al,
@@ -1168,6 +1169,7 @@ static void annotation_line__init(struct annotation_line *al,
al->offset = args->offset;
al->line = strdup(args->line);
al->line_nr = args->line_nr;
+ al->fileloc = args->fileloc;
al->data_nr = nr;
}

@@ -1480,7 +1482,7 @@ annotation_line__print(struct annotation_line *al, struct symbol *sym, u64 start
*/
static int symbol__parse_objdump_line(struct symbol *sym,
struct annotate_args *args,
- char *parsed_line, int *line_nr)
+ char *parsed_line, int *line_nr, char **fileloc)
{
struct map *map = args->ms.map;
struct annotation *notes = symbol__annotation(sym);
@@ -1492,6 +1494,7 @@ static int symbol__parse_objdump_line(struct symbol *sym,
/* /filename:linenr ? Save line number and ignore. */
if (regexec(&file_lineno, parsed_line, 2, match, 0) == 0) {
*line_nr = atoi(parsed_line + match[1].rm_so);
+ *fileloc = strdup(parsed_line);
return 0;
}

@@ -1511,6 +1514,7 @@ static int symbol__parse_objdump_line(struct symbol *sym,
args->offset = offset;
args->line = parsed_line;
args->line_nr = *line_nr;
+ args->fileloc = *fileloc;
args->ms.sym = sym;

dl = disasm_line__new(args);
@@ -1805,6 +1809,7 @@ static int symbol__disassemble_bpf(struct symbol *sym,
args->offset = -1;
args->line = strdup(srcline);
args->line_nr = 0;
+ args->fileloc = NULL;
args->ms.sym = sym;
dl = disasm_line__new(args);
if (dl) {
@@ -1816,6 +1821,7 @@ static int symbol__disassemble_bpf(struct symbol *sym,
args->offset = pc;
args->line = buf + prev_buf_size;
args->line_nr = 0;
+ args->fileloc = NULL;
args->ms.sym = sym;
dl = disasm_line__new(args);
if (dl)
@@ -1850,6 +1856,7 @@ symbol__disassemble_bpf_image(struct symbol *sym,
args->offset = -1;
args->line = strdup("to be implemented");
args->line_nr = 0;
+ args->fileloc = NULL;
dl = disasm_line__new(args);
if (dl)
annotation_line__add(&dl->al, &notes->src->source);
@@ -1931,6 +1938,7 @@ static int symbol__disassemble(struct symbol *sym, struct annotate_args *args)
bool delete_extract = false;
bool decomp = false;
int lineno = 0;
+ char *fileloc = NULL;
int nline;
char *line;
size_t line_len;
@@ -2058,7 +2066,7 @@ static int symbol__disassemble(struct symbol *sym, struct annotate_args *args)
* See disasm_line__new() and struct disasm_line::line_nr.
*/
if (symbol__parse_objdump_line(sym, args, expanded_line,
- &lineno) < 0)
+ &lineno, &fileloc) < 0)
break;
nline++;
}
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index 096cdaf21b01..3757416bcf46 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -84,6 +84,7 @@ struct annotation_options {
print_lines,
full_path,
show_linenr,
+ show_fileloc,
show_nr_jumps,
show_minmax_cycle,
show_asm_raw,
@@ -136,6 +137,7 @@ struct annotation_line {
s64 offset;
char *line;
int line_nr;
+ char *fileloc;
int jump_sources;
float ipc;
u64 cycles;
--
2.30.1


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