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/* Copyright (c) 2021, MariaDB Corporation
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; version 2 of the License.
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 St, Fifth Floor, Boston, MA 02110-1335 USA */
#include <windows.h>
#include <dbghelp.h>
#include <stdio.h>
#include <my_minidump.h>
#define VERBOSE(fmt,...) \
if (verbose) { fprintf(stderr, "my_create_minidump : " fmt,__VA_ARGS__); }
extern "C" BOOL my_create_minidump(DWORD pid, BOOL verbose)
{
HANDLE file = 0;
HANDLE process= 0;
DWORD size= MAX_PATH;
char path[MAX_PATH];
char working_dir[MAX_PATH];
char tmpname[MAX_PATH];
char *filename= 0;
bool ret= FALSE;
process= OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, pid);
if (!process)
{
VERBOSE("cannot open process pid=%lu to create dump, last error %lu\n",
pid, GetLastError());
goto exit;
}
if (QueryFullProcessImageName(process, 0, path, &size) == 0)
{
VERBOSE("cannot read process path for pid %lu, last error %lu\n",
pid, GetLastError());
goto exit;
}
filename= strrchr(path, '\\');
if (filename)
{
filename++;
// We are not interested in dump of some proceses (my_safe_process.exe,cmd.exe)
// since they are only used to start up other programs.
// We're interested however in their children;
const char *exclude_programs[] = {"my_safe_process.exe","cmd.exe", 0};
for(size_t i=0; exclude_programs[i]; i++)
if (_stricmp(filename, exclude_programs[i]) == 0)
goto exit;
}
else
filename= path;
// Add .dmp extension
char *p;
if ((p= strrchr(filename, '.')) == 0)
p= filename + strlen(filename);
strncpy(p, ".dmp", path + MAX_PATH - p);
// Íf file with this name exist, generate unique name with .dmp extension
if (GetFileAttributes(filename) != INVALID_FILE_ATTRIBUTES)
{
if (!GetTempFileName(".", filename, 0, tmpname))
{
fprintf(stderr, "GetTempFileName failed, last error %lu", GetLastError());
goto exit;
}
strncat_s(tmpname, ".dmp", sizeof(tmpname));
filename= tmpname;
}
if (!GetCurrentDirectory(MAX_PATH, working_dir))
{
VERBOSE("GetCurrentDirectory failed, last error %lu", GetLastError());
goto exit;
}
file= CreateFile(filename, GENERIC_READ | GENERIC_WRITE,
0, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
if (file == INVALID_HANDLE_VALUE)
{
VERBOSE("CreateFile() failed for file %s, working dir %s, last error = %lu\n",
filename, working_dir, GetLastError());
goto exit;
}
if (!MiniDumpWriteDump(process, pid, file, MiniDumpNormal, 0, 0, 0))
{
VERBOSE("Failed to write minidump to %s, working dir %s, last error %lu\n",
filename, working_dir, GetLastError());
goto exit;
}
VERBOSE("Minidump written to %s, directory %s\n", filename, working_dir);
ret= TRUE;
exit:
if (process != 0 && process != INVALID_HANDLE_VALUE)
CloseHandle(process);
if (file != 0 && file != INVALID_HANDLE_VALUE)
CloseHandle(file);
return ret;
}
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