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/*
Copyright (C) 2010 ABRT team
Copyright (C) 2010 RedHat 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 "parse_options.h"
static void hash_oops_str(char hash_str[SHA1_RESULT_LEN*2 + 1], char *oops_buf, const char *oops_ptr)
{
// Example of call trace part of oops:
// Call Trace:
// [<f88e11c7>] ? radeon_cp_resume+0x7d/0xbc [radeon]
// [<f88745f8>] ? drm_ioctl+0x1b0/0x225 [drm]
// [<f88e114a>] ? radeon_cp_resume+0x0/0xbc [radeon]
// [<c049b1c0>] ? vfs_ioctl+0x50/0x69
// [<c049b414>] ? do_vfs_ioctl+0x23b/0x247
// [<c0460a56>] ? audit_syscall_entry+0xf9/0x123
// [<c049b460>] ? sys_ioctl+0x40/0x5c
// [<c0403c76>] ? syscall_call+0x7/0xb
struct strbuf *kernel_bt = strbuf_new();
char *call_trace = strstr(oops_buf, "Call Trace");
if (call_trace)
{
call_trace += sizeof("Call Trace\n");
char *end_line = strchr(call_trace, '\n');
int i = 0;
while (end_line)
{
char *line = xstrndup(call_trace, end_line - call_trace);
char *p = skip_whitespace(line);
char *end_mem_block = strchr(p, ' ');
if (!end_mem_block)
error_msg_and_die("no [<mem>] mark");
end_mem_block = skip_whitespace(end_mem_block);
/* +1 for '?' and +1 for space after '?' == +2*/
if (end_mem_block && *end_mem_block == '?')
end_mem_block += 2;
/* strip out offset +off/len */
char *begin_off_len = strchr(end_mem_block, '+');
if (!begin_off_len)
error_msg_and_die("no +offset/len at the end of bt");
char *function = xstrndup(end_mem_block, begin_off_len - end_mem_block);
strbuf_append_strf(kernel_bt, "%s\n", function);
free(line);
if (i == 5)
break;
++i;
call_trace += end_line - call_trace + 1;
end_line = strchr(call_trace, '\n');
}
goto gen_hash;
}
/* Special-case: if the first line is of form:
* WARNING: at net/wireless/core.c:614 wdev_cleanup_work+0xe9/0x120 [cfg80211]() (Not tainted)
* then hash only "file:line func+ofs/len" part.
*/
if (strncmp(oops_ptr, "WARNING: at ", sizeof("WARNING: at ")-1) == 0)
{
const char *p = oops_ptr + sizeof("WARNING: at ")-1;
p = strchr(p, ' '); /* skip filename:NNN */
if (p)
{
p = strchrnul(p + 1, ' '); /* skip function_name+0xNN/0xNNN */
oops_ptr += sizeof("WARNING: at ")-1;
while (oops_ptr < p)
strbuf_append_char(kernel_bt, *oops_ptr++);
}
}
gen_hash: ;
char hash_bytes[SHA1_RESULT_LEN];
sha1_ctx_t sha1ctx;
sha1_begin(&sha1ctx);
sha1_hash(&sha1ctx, kernel_bt->buf, kernel_bt->len);
sha1_end(&sha1ctx, hash_bytes);
strbuf_free(kernel_bt);
bin2hex(hash_str, hash_bytes, SHA1_RESULT_LEN)[0] = '\0';
VERB3 log("hash: %s", hash_str);
}
int main(int argc, char **argv)
{
abrt_init(argv);
const char *dump_dir_name = ".";
/* Can't keep these strings/structs static: _() doesn't support that */
const char *program_usage_string = _(
"\b [-vs] -d DIR\n"
"\n"
"Calculates and saves UUID and DUPHASH for oops 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);
export_abrt_envvars(0);
struct dump_dir *dd = dd_opendir(dump_dir_name, /*flags:*/ 0);
if (!dd)
return 1;
char *oops = dd_load_text(dd, FILENAME_BACKTRACE);
char hash_str[SHA1_RESULT_LEN*2 + 1];
hash_oops_str(hash_str, oops, oops);
free(oops);
dd_save_text(dd, FILENAME_UUID, hash_str);
dd_save_text(dd, FILENAME_DUPHASH, hash_str);
dd_close(dd);
return 0;
}
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