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perf report: Use less for scripts output

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The UI viewer for scripts output has a lot of limitations: limited size,
no search or save function, slow, and various other issues.

Just use 'less' to display directly on the terminal instead.

This won't work in GTK mode, but GTK doesn't support these context menus
anyways. If that is ever done could use an terminal for the output.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Feng Tang <feng.tang@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20190309055628.21617-8-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen 2019-03-08 21:56:20 -08:00 committed by Arnaldo Carvalho de Melo
parent e51f806198
commit 75065a85a9
1 changed files with 17 additions and 113 deletions
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130
tools/perf/ui/browsers/scripts.c
View File

@ -1,35 +1,12 @@
// SPDX-License-Identifier: GPL-2.0
#include <elf.h>
#include <inttypes.h>
#include <sys/ttydefaults.h>
#include <string.h>
#include "../../util/sort.h"
#include "../../util/util.h"
#include "../../util/hist.h"
#include "../../util/debug.h"
#include "../../util/symbol.h"
#include "../browser.h"
#include "../helpline.h"
#include "../libslang.h"
/* 2048 lines should be enough for a script output */
#define MAX_LINES 2048
/* 160 bytes for one output line */
#define AVERAGE_LINE_LEN 160
struct script_line {
struct list_head node;
char line[AVERAGE_LINE_LEN];
};
struct perf_script_browser {
struct ui_browser b;
struct list_head entries;
const char *script_name;
int nr_lines;
};
#define SCRIPT_NAMELEN 128
#define SCRIPT_MAX_NO 64
/*
@ -73,69 +50,29 @@ static int list_scripts(char *script_name)
return ret;
}
static void script_browser__write(struct ui_browser *browser,
void *entry, int row)
static void run_script(char *cmd)
{
struct script_line *sline = list_entry(entry, struct script_line, node);
bool current_entry = ui_browser__is_current_entry(browser, row);
ui_browser__set_color(browser, current_entry ? HE_COLORSET_SELECTED :
HE_COLORSET_NORMAL);
ui_browser__write_nstring(browser, sline->line, browser->width);
pr_debug("Running %s\n", cmd);
SLang_reset_tty();
if (system(cmd) < 0)
pr_warning("Cannot run %s\n", cmd);
/*
* SLang doesn't seem to reset the whole terminal, so be more
* forceful to get back to the original state.
*/
printf("\033[c\033[H\033[J");
fflush(stdout);
SLang_init_tty(0, 0, 0);
SLsmg_refresh();
}
static int script_browser__run(struct perf_script_browser *browser)
{
int key;
if (ui_browser__show(&browser->b, browser->script_name,
"Press ESC to exit") < 0)
return -1;
while (1) {
key = ui_browser__run(&browser->b, 0);
/* We can add some special key handling here if needed */
break;
}
ui_browser__hide(&browser->b);
return key;
}
int script_browse(const char *script_opt)
{
char cmd[SCRIPT_FULLPATH_LEN*2], script_name[SCRIPT_FULLPATH_LEN];
char *line = NULL;
size_t len = 0;
ssize_t retlen;
int ret = -1, nr_entries = 0;
FILE *fp;
void *buf;
struct script_line *sline;
struct perf_script_browser script = {
.b = {
.refresh = ui_browser__list_head_refresh,
.seek = ui_browser__list_head_seek,
.write = script_browser__write,
},
.script_name = script_name,
};
INIT_LIST_HEAD(&script.entries);
/* Save each line of the output in one struct script_line object. */
buf = zalloc((sizeof(*sline)) * MAX_LINES);
if (!buf)
return -1;
sline = buf;
memset(script_name, 0, SCRIPT_FULLPATH_LEN);
if (list_scripts(script_name))
goto exit;
return -1;
sprintf(cmd, "perf script -s %s ", script_name);
@ -147,42 +84,9 @@ int script_browse(const char *script_opt)
strcat(cmd, input_name);
}
strcat(cmd, " 2>&1");
strcat(cmd, " 2>&1 | less");
fp = popen(cmd, "r");
if (!fp)
goto exit;
run_script(cmd);
while ((retlen = getline(&line, &len, fp)) != -1) {
strncpy(sline->line, line, AVERAGE_LINE_LEN);
/* If one output line is very large, just cut it short */
if (retlen >= AVERAGE_LINE_LEN) {
sline->line[AVERAGE_LINE_LEN - 1] = '\0';
sline->line[AVERAGE_LINE_LEN - 2] = '\n';
}
list_add_tail(&sline->node, &script.entries);
if (script.b.width < retlen)
script.b.width = retlen;
if (nr_entries++ >= MAX_LINES - 1)
break;
sline++;
}
if (script.b.width > AVERAGE_LINE_LEN)
script.b.width = AVERAGE_LINE_LEN;
free(line);
pclose(fp);
script.nr_lines = nr_entries;
script.b.nr_entries = nr_entries;
script.b.entries = &script.entries;
ret = script_browser__run(&script);
exit:
free(buf);
return ret;
return 0;
}