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Diffstat (limited to 'src/Backtrace/main.c')
| -rw-r--r-- | src/Backtrace/main.c | 361 |
1 files changed, 0 insertions, 361 deletions
diff --git a/src/Backtrace/main.c b/src/Backtrace/main.c deleted file mode 100644 index cddf8979..00000000 --- a/src/Backtrace/main.c +++ /dev/null @@ -1,361 +0,0 @@ -/* -*-mode:c++;c-file-style:"bsd";c-basic-offset:2;indent-tabs-mode:nil-*- - main.cpp - parses command line arguments - - Copyright (C) 2009 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 <argp.h> -#include <stdlib.h> -#include <sysexits.h> -#include <string.h> -#include "config.h" -#include "backtrace.h" -#include "fallback.h" - -/* Too large files are trimmed. */ -#define FILE_SIZE_LIMIT 20000000 /* ~ 20 MB */ - -#define EX_PARSINGFAILED EX__MAX + 1 /* = 79 */ -#define EX_THREADDETECTIONFAILED EX__MAX + 2 /* = 80 */ - -const char *argp_program_version = "abrt-backtrace " VERSION; -const char *argp_program_bug_address = "<crash-catcher@lists.fedorahosted.org>"; - -static char doc[] = "abrt-backtrace -- backtrace analyzer"; - -/* A description of the arguments we accept. */ -static char args_doc[] = "FILE"; - -static struct argp_option options[] = { - {"independent" , 'i', 0 , 0, "Prints independent backtrace (fallback)"}, - {"single-thread" , 'n', 0 , 0, "Display the crash thread only in the backtrace"}, - {"frame-depth" , 'd', "N", 0, "Display only top N frames under the crash frame"}, - {"remove-exit-handlers" , 'r', 0 , 0, "Removes exit handler frames from the displayed backtrace"}, - {"remove-noncrash-frames", 'm', 0 , 0, "Removes common frames known as not causing crash"}, - {"debug-parser" , 'p', 0 , 0, "Prints parser debug information"}, - {"debug-scanner" , 's', 0 , 0, "Prints scanner debug information"}, - {"verbose" , 'v', 0 , 0, "Print human-friendly superfluous output."}, - { 0 } -}; - -struct arguments -{ - bool independent; - bool single_thread; - int frame_depth; /* negative == do not limit the depth */ - bool remove_exit_handlers; - bool remove_noncrash_frames; - bool debug_parser; - bool debug_scanner; - 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 'i': arguments->independent = true; break; - case 'n': arguments->single_thread = true; break; - case 'd': - if (1 != sscanf(arg, "%d", &arguments->frame_depth)) - { - /* Must be a number. */ - argp_usage(state); - exit(EX_USAGE); /* Invalid argument */ - } - break; - case 'r': arguments->remove_exit_handlers = true; break; - case 'm': arguments->remove_noncrash_frames = true; break; - case 'p': arguments->debug_parser = true; break; - case 's': arguments->debug_scanner = 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: - break; - - default: - return ARGP_ERR_UNKNOWN; - } - return 0; -} - -/* Our argp parser. */ -static struct argp argp = { options, parse_opt, args_doc, doc }; - -#define PYTHON_BACKTRACE_ID1 "\n\nTraceback (most recent call last):\n" -#define PYTHON_BACKTRACE_ID2 "\n\nLocal variables in innermost frame:\n" - -int main(int argc, char **argv) -{ - /* Set options default values and parse program command line. */ - struct arguments arguments; - arguments.independent = false; - arguments.frame_depth = -1; - arguments.single_thread = false; - arguments.remove_exit_handlers = false; - arguments.remove_noncrash_frames = false; - arguments.debug_parser = false; - arguments.debug_scanner = false; - arguments.verbose = false; - arguments.filename = 0; - argp_parse(&argp, argc, argv, 0, 0, &arguments); - - char *bttext = NULL; - - /* If a filename was provided, read input from file. - Otherwise read from stdin. */ - if (arguments.filename) - { - /* Open input file, and parse it. */ - FILE *fp = fopen(arguments.filename, "r"); - if (!fp) - { - fprintf(stderr, "Unable to open '%s'.\n", arguments.filename); - exit(EX_NOINPUT); /* No such file or directory */ - } - - /* Header and footer of the backtrace is stripped to simplify the parser. - * A drawback is that the backtrace must be loaded to memory. - */ - fseek(fp, 0, SEEK_END); - size_t size = ftell(fp); - fseek(fp, 0, SEEK_SET); - - if (size > FILE_SIZE_LIMIT) - { - fprintf(stderr, "Input file too big (%zd). Maximum size is %d.\n", - size, FILE_SIZE_LIMIT); - exit(EX_IOERR); - } - - /* Handle the case that the input file is empty. - * The code is not designed to support completely empty backtrace. - * Silently exit indicating success. - */ - if (size == 0) - { - fclose(fp); - exit(0); - } - - bttext = malloc(size + 1); - if (!bttext) - { - fclose(fp); - fputs("malloc failed", stderr); - exit(EX_OSERR); - } - - if (1 != fread(bttext, size, 1, fp)) - { - fclose(fp); - fprintf(stderr, "Unable to read from '%s'.\n", arguments.filename); - exit(EX_IOERR); /* IO Error */ - } - - bttext[size] = '\0'; - fclose(fp); - } - else - { - struct strbuf *btin = strbuf_new(); - int c; - while ((c = getchar()) != EOF && c != '\0') - strbuf_append_char(btin, (char)c); - - strbuf_append_char(btin, '\0'); - bttext = btin->buf; - strbuf_free_nobuf(btin); /* free btin, but not its internal buffer */ - } - - /* Detect Python backtraces. If it is a Python backtrace, - * silently exit for now. - */ - if (strstr(bttext, PYTHON_BACKTRACE_ID1) != NULL - && strstr(bttext, PYTHON_BACKTRACE_ID2) != NULL) - { - exit(0); - } - - /* Print independent backtrace and exit. */ - if (arguments.independent) - { - struct strbuf *ibt = independent_backtrace(bttext); - puts(ibt->buf); - strbuf_free(ibt); - free(bttext); - return 0; /* OK */ - } - - /* Skip the backtrace header information. */ - char *btnoheader_a = strstr(bttext, "\nThread "); - char *btnoheader_b = strstr(bttext, "\n#"); - char *btnoheader = bttext; - if (btnoheader_a) - { - if (btnoheader_b && btnoheader_b < btnoheader_a) - btnoheader = btnoheader_b + 1; - else - btnoheader = btnoheader_a + 1; - } - else if (btnoheader_b) - btnoheader = btnoheader_b + 1; - - /* Bug fixing hack for broken backtraces. - * Sometimes the empty line is missing before new Thread section. - * This is against rules, but a bug (now fixed) in Linux kernel caused - * this. - */ - char *thread_fixer = btnoheader + 1; - while ((thread_fixer = strstr(thread_fixer, "\nThread")) != NULL) - { - if (thread_fixer[-1] != '\n') - thread_fixer[-1] = '\n'; - - ++thread_fixer; - } - - /* Bug fixing hack for GDB - remove wrongly placed newlines from the backtrace. - * Sometimes there is a newline in the local variable section. - * This is caused by some GDB hooks. - * Example: rhbz#538440 - * #1 0x0000000000420939 in sync_deletions (mse=0x0, mfld=0x1b85020) - * at mail-stub-exchange.c:1119 - * status = <value optimized out> - * iter = 0x1af38d0 - * known_messages = 0x1b5c460Traceback (most recent call last): - * File "/usr/share/glib-2.0/gdb/glib.py", line 98, in next - * if long (node["key_hash"]) >= 2: - * RuntimeError: Cannot access memory at address 0x11 - * - * __PRETTY_FUNCTION__ = "sync_deletions" - * #2 0x0000000000423e6b in refresh_folder (stub=0x1b77f10 [MailStubExchange], - * ... - * - * The code removes every empty line (also those containing only spaces), - * which is not followed by a new Thread section. - * - * rhbz#555251 contains empty lines with spaces - */ - char *empty_line = btnoheader; - char *c = btnoheader; - while (*c) - { - if (*c == '\n') - { - char *cend = c + 1; - while (*cend == ' ' || *cend == '\t') - ++cend; - if (*cend == '\n' && 0 != strncmp(cend, "\nThread", strlen("\nThread"))) - memmove(c, cend, strlen(cend) + 1); - } - ++c; - } - while ((empty_line = strstr(empty_line, "\n\n")) != NULL) - { - if (0 != strncmp(empty_line, "\n\nThread", strlen("\n\nThread"))) - { - /* Remove the empty line by converting the first newline to char. */ - empty_line[0] = 'X'; - } - ++empty_line; - } - - /* Cut the backtrace footer. - * Footer: lines not starting with # or "Thread", and separated from - * the backtrace body by a newline. - */ - /* It is not necessary for now, because of the bug fixing hack for GDB. - int i; - for (i = size - 1; i > 0; --i) - { - if (bttext[i] != '\n') - continue; - if (strncmp(bttext + i + 1, "Thread", strlen("Thread")) == 0) - break; - if (bttext[i + 1] == '#') - break; - if (bttext[i - 1] == '\n') - { - bttext[i] = '\0'; - break; - } - }*/ - - /* Try to parse the backtrace. */ - struct backtrace *backtrace; - backtrace = do_parse(btnoheader, arguments.debug_parser, arguments.debug_scanner); - - /* If the parser failed print independent backtrace. */ - if (!backtrace) - { - struct strbuf *ibt = independent_backtrace(bttext); - puts(ibt->buf); - strbuf_free(ibt); - free(bttext); - /* Parsing failed, but the output can be used. */ - return EX_PARSINGFAILED; - } - - free(bttext); - - /* If a single thread is requested, remove all other threads. */ - int retval = 0; - struct thread *crash_thread = NULL; - if (arguments.single_thread) - { - crash_thread = backtrace_find_crash_thread(backtrace); - if (crash_thread) - backtrace_remove_threads_except_one(backtrace, crash_thread); - else - { - fprintf(stderr, "Detection of crash thread failed.\n"); - /* THREAD DETECTION FAILED, BUT THE OUTPUT CAN BE USED */ - retval = EX_THREADDETECTIONFAILED; - } - } - - if (arguments.remove_noncrash_frames) - backtrace_remove_noncrash_frames(backtrace); - - /* If a frame removal is requested, do it now. */ - if (arguments.frame_depth > 0) - backtrace_limit_frame_depth(backtrace, arguments.frame_depth); - - /* Frame removal can be done before removing exit handlers */ - if (arguments.remove_exit_handlers > 0) - backtrace_remove_exit_handlers(backtrace); - - backtrace_print_tree(backtrace, arguments.verbose); - backtrace_free(backtrace); - return retval; -} |