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/* minidumper.cc
Copyright 2014 Red Hat Inc.
This file is part of Cygwin.
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 (file COPYING.dumper) 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 <sys/cygwin.h>
#include <cygwin/version.h>
#include <getopt.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
BOOL verbose = FALSE;
BOOL nokill = FALSE;
typedef DWORD MINIDUMP_TYPE;
typedef BOOL (WINAPI *MiniDumpWriteDump_type)(
HANDLE hProcess,
DWORD dwPid,
HANDLE hFile,
MINIDUMP_TYPE DumpType,
CONST void *ExceptionParam,
CONST void *UserStreamParam,
CONST void *allbackParam);
static void
minidump(DWORD pid, MINIDUMP_TYPE dump_type, const char *minidump_file)
{
HANDLE dump_file;
HANDLE process;
MiniDumpWriteDump_type MiniDumpWriteDump_fp;
HMODULE module;
module = LoadLibrary("dbghelp.dll");
if (!module)
{
fprintf (stderr, "error loading DbgHelp\n");
return;
}
MiniDumpWriteDump_fp = (MiniDumpWriteDump_type)GetProcAddress(module, "MiniDumpWriteDump");
if (!MiniDumpWriteDump_fp)
{
fprintf (stderr, "error getting the address of MiniDumpWriteDump\n");
return;
}
dump_file = CreateFile(minidump_file,
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
CREATE_ALWAYS,
FILE_FLAG_BACKUP_SEMANTICS,
NULL);
if (dump_file == INVALID_HANDLE_VALUE)
{
fprintf (stderr, "error opening file\n");
return;
}
process = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ | PROCESS_TERMINATE,
FALSE,
pid);
if (dump_file == INVALID_HANDLE_VALUE)
{
fprintf (stderr, "error opening process\n");
return;
}
BOOL success = (*MiniDumpWriteDump_fp)(process,
pid,
dump_file,
dump_type,
NULL,
NULL,
NULL);
if (success)
{
if (verbose)
printf ("minidump created successfully\n");
}
else
{
fprintf (stderr, "error creating minidump\n");
}
/* Unless nokill is given, behave like dumper and terminate the dumped
process */
if (!nokill)
{
TerminateProcess(process, 128 + 9);
WaitForSingleObject(process, INFINITE);
}
CloseHandle(process);
CloseHandle(dump_file);
FreeLibrary(module);
}
static void
usage (FILE *stream, int status)
{
fprintf (stream, "\
Usage: %s [OPTION] FILENAME WIN32PID\n\
\n\
Write minidump from WIN32PID to FILENAME.dmp\n\
\n\
-t, --type minidump type flags\n\
-n, --nokill don't terminate the dumped process\n\
-d, --verbose be verbose while dumping\n\
-h, --help output help information and exit\n\
-q, --quiet be quiet while dumping (default)\n\
-V, --version output version information and exit\n\
\n", program_invocation_short_name);
exit (status);
}
struct option longopts[] = {
{"type", required_argument, NULL, 't'},
{"nokill", no_argument, NULL, 'n'},
{"verbose", no_argument, NULL, 'd'},
{"help", no_argument, NULL, 'h'},
{"quiet", no_argument, NULL, 'q'},
{"version", no_argument, 0, 'V'},
{0, no_argument, NULL, 0}
};
const char *opts = "tndhqV";
static void
print_version ()
{
printf ("minidumper (cygwin) %d.%d.%d\n"
"Minidump write for Cygwin\n"
"Copyright (C) 1999 - %s Red Hat, Inc.\n"
"This is free software; see the source for copying conditions. There is NO\n"
"warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n",
CYGWIN_VERSION_DLL_MAJOR / 1000,
CYGWIN_VERSION_DLL_MAJOR % 1000,
CYGWIN_VERSION_DLL_MINOR,
strrchr (__DATE__, ' ') + 1);
}
int
main (int argc, char **argv)
{
int opt;
const char *p = "";
DWORD pid;
MINIDUMP_TYPE dump_type = 0; // MINIDUMP_NORMAL
while ((opt = getopt_long (argc, argv, opts, longopts, NULL) ) != EOF)
switch (opt)
{
case 't':
{
char *endptr;
dump_type = strtoul(optarg, &endptr, 0);
if (*endptr != '\0')
{
fprintf (stderr, "syntax error in minidump type \"%s\" near character #%d.\n", optarg, (int) (endptr - optarg));
exit(1);
}
}
break;
case 'n':
nokill = TRUE;
break;
case 'd':
verbose = TRUE;
break;
case 'q':
verbose = FALSE;
break;
case 'h':
usage (stdout, 0);
case 'V':
print_version ();
exit (0);
default:
fprintf (stderr, "Try `%s --help' for more information.\n",
program_invocation_short_name);
exit (1);
}
if (argv && *(argv + optind) && *(argv + optind +1))
{
ssize_t len = cygwin_conv_path (CCP_POSIX_TO_WIN_A | CCP_RELATIVE,
*(argv + optind), NULL, 0);
char *win32_name = (char *) alloca (len);
cygwin_conv_path (CCP_POSIX_TO_WIN_A | CCP_RELATIVE, *(argv + optind),
win32_name, len);
if ((p = strrchr (win32_name, '\\')))
p++;
else
p = win32_name;
pid = strtoul (*(argv + optind + 1), NULL, 10);
}
else
{
usage (stderr, 1);
return -1;
}
char *minidump_file = (char *) malloc (strlen (p) + sizeof (".dmp"));
if (!minidump_file)
{
fprintf (stderr, "error allocating memory\n");
return -1;
}
sprintf (minidump_file, "%s.dmp", p);
if (verbose)
printf ("dumping process %u to %s using dump type flags 0x%x\n", (unsigned int)pid, minidump_file, (unsigned int)dump_type);
minidump(pid, dump_type, minidump_file);
free (minidump_file);
};
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