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/*
Copyright (C) 2010, 2011 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 "abrtlib.h"
#include "../btparser/backtrace.h"
#include "../btparser/frame.h"
#include "../btparser/location.h"
#include "parse_options.h"
#define PROGNAME "abrt-action-generate-backtrace"
static const char *dump_dir_name = ".";
static void create_hash(char hash_str[SHA1_RESULT_LEN*2 + 1], const char *pInput)
{
unsigned len;
unsigned char hash2[SHA1_RESULT_LEN];
sha1_ctx_t sha1ctx;
sha1_begin(&sha1ctx);
sha1_hash(pInput, strlen(pInput), &sha1ctx);
sha1_end(hash2, &sha1ctx);
len = SHA1_RESULT_LEN;
char *d = hash_str;
unsigned char *s = hash2;
while (len)
{
*d++ = "0123456789abcdef"[*s >> 4];
*d++ = "0123456789abcdef"[*s & 0xf];
s++;
len--;
}
*d = '\0';
//log("hash2:%s str:'%s'", hash_str, pInput);
}
int main(int argc, char **argv)
{
char *env_verbose = getenv("ABRT_VERBOSE");
if (env_verbose)
g_verbose = atoi(env_verbose);
/* Can't keep these strings/structs static: _() doesn't support that */
const char *program_usage_string = _(
PROGNAME" [options] -d DIR\n"
"\n"
"Analyzes C/C++ backtrace, generates duplication hash, backtrace rating, and identifies crash function in dump directory DIR"
);
enum {
OPT_v = 1 << 0,
OPT_d = 1 << 1
};
/* Keep enum above and order of options below in sync! */
struct options program_options[] = {
OPT__VERBOSE(&g_verbose),
OPT_STRING('d', NULL, &dump_dir_name, "DIR", _("Dump directory")),
OPT_END()
};
/*unsigned opts =*/ parse_opts(argc, argv, program_options, program_usage_string);
putenv(xasprintf("ABRT_VERBOSE=%u", g_verbose));
char *pfx = getenv("ABRT_PROG_PREFIX");
if (pfx && string_to_bool(pfx))
msg_prefix = PROGNAME;
struct dump_dir *dd = dd_opendir(dump_dir_name, /*flags:*/ 0);
if (!dd)
return 1;
char *component = dd_load_text(dd, FILENAME_COMPONENT);
/* Read backtrace */
char *backtrace_str = dd_load_text_ext(dd, FILENAME_BACKTRACE,
DD_LOAD_TEXT_RETURN_NULL_ON_FAILURE);
if (!backtrace_str)
{
dd_close(dd);
return 1;
}
/* Compute backtrace hash */
struct btp_location location;
btp_location_init(&location);
char *backtrace_str_ptr = backtrace_str;
struct btp_backtrace *backtrace = btp_backtrace_parse(&backtrace_str_ptr, &location);
free(backtrace_str);
/* Store backtrace hash */
if (!backtrace)
{
/*
* The parser failed. Compute the duphash from the executable
* instead of a backtrace.
* and component only. This is not supposed to happen often.
*/
log(_("Backtrace parsing failed for %s"), dump_dir_name);
log("%d:%d: %s", location.line, location.column, location.message);
struct strbuf *emptybt = strbuf_new();
char *executable = dd_load_text(dd, FILENAME_EXECUTABLE);
strbuf_prepend_str(emptybt, executable);
free(executable);
strbuf_prepend_str(emptybt, component);
VERB3 log("Generating duphash: %s", emptybt->buf);
char hash_str[SHA1_RESULT_LEN*2 + 1];
create_hash(hash_str, emptybt->buf);
dd_save_text(dd, FILENAME_DUPHASH, hash_str);
/*
* Other parts of ABRT assume that if no rating is available,
* it is ok to allow reporting of the bug. To be sure no bad
* backtrace is reported, rate the backtrace with the lowest
* rating.
*/
dd_save_text(dd, FILENAME_RATING, "0");
strbuf_free(emptybt);
free(component);
dd_close(dd);
/* Report success even if the parser failed, as the backtrace
* has been created and rated. The failure is caused by a flaw
* in the parser, not in the backtrace.
*/
return 0;
}
/* Compute duplication hash. */
char *str_hash_core = btp_backtrace_get_duplication_hash(backtrace);
struct strbuf *str_hash = strbuf_new();
strbuf_append_str(str_hash, component);
strbuf_append_str(str_hash, str_hash_core);
VERB3 log("Generating duphash: %s", str_hash->buf);
char hash_str[SHA1_RESULT_LEN*2 + 1];
create_hash(hash_str, str_hash->buf);
dd_save_text(dd, FILENAME_DUPHASH, hash_str);
strbuf_free(str_hash);
free(str_hash_core);
/* Compute the backtrace rating. */
float quality = btp_backtrace_quality_complex(backtrace);
const char *rating;
if (quality < 0.6f)
rating = "0";
else if (quality < 0.7f)
rating = "1";
else if (quality < 0.8f)
rating = "2";
else if (quality < 0.9f)
rating = "3";
else
rating = "4";
dd_save_text(dd, FILENAME_RATING, rating);
/* Get the function name from the crash frame. */
struct btp_frame *crash_frame = btp_backtrace_get_crash_frame(backtrace);
if (crash_frame)
{
if (crash_frame->function_name &&
0 != strcmp(crash_frame->function_name, "??"))
{
dd_save_text(dd, FILENAME_CRASH_FUNCTION, crash_frame->function_name);
}
btp_frame_free(crash_frame);
}
btp_backtrace_free(backtrace);
dd_close(dd);
free(component);
return 0;
}
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