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MDEV-11499 mysqltest, Windows : improve diagnostics if server fails to shutdown

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Create minidump when server fails to shutdown. If process is being
debugged, cause a debug break.

Moves some code which is part of safe_kill into mysys, as both safe_kill,
and mysqltest produce minidumps on different timeouts.

Small cleanup in wait_until_dead() - replace inefficient loop with a single
wait.
This commit is contained in:
Vladislav Vaintroub
2021-09-24 01:33:05 +02:00
parent 4bfdba2e89
commit ca7046dc19
6 changed files with 193 additions and 117 deletions
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109
mysql-test/lib/My/SafeProcess/safe_kill_win.cc
View File

@ -26,19 +26,7 @@
#include <signal.h>
#include <stdlib.h>
#include <psapi.h>
#ifdef _MSC_VER
/* Silence warning in OS header dbghelp.h */
#pragma warning(push)
#pragma warning(disable : 4091)
#endif
#include <dbghelp.h>
#ifdef _MSC_VER
/* Silence warning in OS header dbghelp.h */
#pragma warning(pop)
#endif
#include <my_minidump.h>
#include <tlhelp32.h>
#include <vector>
@ -64,106 +52,13 @@ static std::vector<DWORD> find_children(DWORD pid)
return children;
}
void dump_single_process(DWORD pid)
{
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;
process= OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, pid);
if (!process)
{
fprintf(stderr, "safe_kill : cannot open process pid=%lu to create dump, last error %lu\n",
pid, GetLastError());
goto exit;
}
if (QueryFullProcessImageName(process, 0, path, &size) == 0)
{
fprintf(stderr, "safe_kill : 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);
// <20>f 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))
{
fprintf(stderr, "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)
{
fprintf(stderr, "safe_kill : 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))
{
fprintf(stderr, "Failed to write minidump to %s, working dir %s, last error %lu\n",
filename, working_dir, GetLastError());
goto exit;
}
fprintf(stderr, "Minidump written to %s, directory %s\n", filename, working_dir);
exit:
if (process != 0 && process != INVALID_HANDLE_VALUE)
CloseHandle(process);
if (file != 0 && file != INVALID_HANDLE_VALUE)
CloseHandle(file);
}
static int create_dump(DWORD pid, int recursion_depth= 5)
{
if (recursion_depth < 0)
return 0;
dump_single_process(pid);
my_create_minidump(pid, TRUE);
std::vector<DWORD> children= find_children(pid);
for(size_t i=0; i < children.size(); i++)
create_dump(children[i], recursion_depth -1);