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/*
btparser.c - backtrace parsing tool
Copyright (C) 2010 Red Hat, Inc.
This program 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 2 of the License, or
(at your option) any later version.
This program 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, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "lib/backtrace.h"
#include "lib/thread.h"
#include "lib/frame.h"
#include "lib/utils.h"
#include "lib/location.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <argp.h>
#include <sysexits.h>
#include <assert.h>
const char *argp_program_version = "btparser " VERSION;
const char *argp_program_bug_address = "<kklic@redhat.com>";
static char doc[] = "btparser -- backtrace parser";
/* A description of the arguments we accept. */
static char args_doc[] = "FILE";
static struct argp_option options[] = {
{"rate" , 'r', 0, 0, "Prints the backtrace rating from 0 to 1"},
{"crash-function" , 'c', 0, 0, "Prints crash function"},
{"duplication-hash", 'h', 0, 0, "Prints normalized string useful for hash calculation"},
{"debug" , 'd', 0, 0, "Prints parser debug information"},
{"verbose" , 'v', 0, 0, "Prints human-friendly superfluous output."},
{ 0 }
};
enum what_to_output
{
BACKTRACE,
RATE,
CRASH_FUNCTION,
DUPLICATION_HASH
};
struct arguments
{
enum what_to_output output;
bool debug;
bool verbose;
char *filename;
};
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
/* Get the input argument from argp_parse, which we
know is a pointer to our arguments structure. */
struct arguments *arguments = (struct arguments*)state->input;
switch (key)
{
case 'r': arguments->output = RATE; break;
case 'c': arguments->output = CRASH_FUNCTION; break;
case 'h': arguments->output = DUPLICATION_HASH; break;
case 'd': arguments->debug = true; break;
case 'v': arguments->verbose = true; break;
case ARGP_KEY_ARG:
if (arguments->filename)
{
/* Too many arguments. */
argp_usage(state);
exit(EX_USAGE); /* Invalid argument */
}
arguments->filename = arg;
break;
case ARGP_KEY_END:
if (!arguments->filename)
{
/* Argument required */
argp_usage(state);
exit(EX_USAGE); /* Invalid argument */
}
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
/** Our argp parser. */
static struct argp argp = { options, parse_opt, args_doc, doc };
int main(int argc, char **argv)
{
/* Set options default values and parse program command line. */
struct arguments arguments;
arguments.output = BACKTRACE;
arguments.debug = false;
arguments.verbose = false;
arguments.filename = 0;
argp_parse(&argp, argc, argv, 0, 0, &arguments);
if (arguments.debug)
btp_debug_parser = true;
/* Load the input file to a string. */
char *text = btp_file_to_string(arguments.filename);
if (!text)
{
fprintf(stderr, "Failed to read the input file.\n");
exit(1);
}
/* Parse the input string. */
char *ptr = text;
struct btp_location location;
btp_location_init(&location);
struct btp_backtrace *backtrace = btp_backtrace_parse(&ptr, &location);
if (!backtrace)
{
fprintf(stderr,
"Failed to parse the backtrace.\n Line %d, column %d: %s\n",
location.line,
location.column,
location.message);
exit(1);
}
free(text);
switch (arguments.output)
{
case BACKTRACE:
{
char *text_parsed = btp_backtrace_to_text(backtrace, false);
puts(text_parsed);
free(text_parsed);
break;
}
case RATE:
{
float q = btp_backtrace_quality_complex(backtrace);
printf("%.2f", q);
break;
}
case CRASH_FUNCTION:
{
struct btp_frame *frame = btp_backtrace_get_crash_frame(backtrace);
if (!frame)
{
fprintf(stderr, "Failed to find the crash function.");
exit(1);
}
if (frame->function_name)
puts(frame->function_name);
else
{
assert(frame->signal_handler_called);
puts("signal handler");
}
btp_frame_free(frame);
break;
}
case DUPLICATION_HASH:
{
char *hash = btp_backtrace_get_duplication_hash(backtrace);
puts(hash);
free(hash);
break;
}
default:
fprintf(stderr, "Unexpected operation.");
exit(1);
}
btp_backtrace_free(backtrace);
return 0;
}
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