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/* Process a stream of stack samples into stack traces.
Copyright (C) 2023 Red Hat, Inc.
This file is part of elfutils.
This file is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
elfutils is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <argp.h>
#include <stdio.h>
#include <string.h>
static char *input_path = NULL;
static char *output_path = NULL;
#define MODE_OPTS "none/passthru"
#define MODE_NONE 0x0
#define MODE_PASSTHRU 0x1
#define MODE_NAIVE 0x2
#define MODE_CACHING 0x3
static int processing_mode;
#define FORMAT_OPTS "sysprof"
#define FORMAT_PERF 0x1
#define FORMAT_SYSPROF 0x2
static int input_format;
static error_t
parse_opt (int key, char *arg __attribute__ ((unused)),
struct argp_state *state)
{
switch (key)
{
case 'i':
input_path = arg;
break;
case 'o':
output_path = arg;
break;
case 'm':
if (strcmp (arg, "none") == 0)
{
processing_mode = MODE_NONE;
}
else if (strcmp (arg, "passthru") == 0)
{
processing_mode = MODE_PASSTHRU;
}
else
{
argp_error (state, N_("Unsupported -m '%s', should be " MODE_OPTS "."), arg);
}
break;
case 'f':
if (strcmp (arg, "sysprof") == 0)
{
input_format = FORMAT_SYSPROF;
}
else
{
argp_error (state, N_("Unsupported -f '%s', should be " FORMAT_OPTS "."), arg);
}
break;
case ARGP_KEY_END:
if (input_path == NULL)
argp_error (state, N_("-i PATH needs an input file or FIFO."));
if (output_path == NULL)
argp_error (state, N_("-o PATH needs an output path or FIFO."));
if (processing_mode == 0)
processing_mode = MODE_PASSTHRU;
if (input_format == 0)
input_format = FORMAT_SYSPROF;
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
int
main (int argc, char **argv)
{
/* Set locale. */
(void) setlocale (LC_ALL, "");
const struct argp_option options[] =
{
{ NULL, 0, NULL, 0, N_("Input and output selection options:"), 0 },
{ "input", 'i', "PATH", 0,
N_("File or FIFO to read stack samples from"), 0 },
/* TODO: Should also support taking an FD for fork/exec pipes. */
{ "output", 'o', "PATH", 0,
N_("File or FIFO to send stack traces to"), 0 },
{ NULL, 0, NULL, 0, N_("Processing options:"), 0 },
{ "mode", 'm', MODE_OPTS, 0,
N_("Processing mode, default 'passthru'"), 0 },
/* TODO: Should also support 'naive', 'caching'. */
/* TODO: Add an option to control stack-stitching. */
{ "format", 'f', FORMAT_OPTS, 0,
N_("Input data format, default 'sysprof'"), 0 },
/* TODO: Add an option to control output data format separately,
shift to I/O selection section. */
{ NULL, 0, NULL, 0, NULL, 0 }
};
const struct argp argp =
{
.options = options,
.parser = parse_opt,
.doc = N_("Process a stream of stack samples into stack traces.\n\
\n\
Utility is a work-in-progress, see README.eu-stacktrace in the source branch.")
};
argp_parse(&argp, argc, argv, 0, NULL, NULL);
/* hello world */
}
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