https://bugs.winehq.org/show_bug.cgi?id=46908
Bug ID: 46908 Summary: Support msvcp mtx_init 'mtx_try' flag (0x2) to create a mutex object that supports test and return Product: Wine Version: 4.4 Hardware: x86-64 OS: Linux Status: NEW Severity: normal Priority: P2 Component: msvcp Assignee: wine-bugs@winehq.org Reporter: focht@gmx.net Distribution: ---
Hello folks,
some apps cause a significant spam = slowdown due to the following FIXME:
--- snip --- fixme:msvcp:_Mtx_init_in_situ unknown flags ignored: 2 --- snip ---
You can find various bug reports which include such spam:
https://bugs.winehq.org/show_bug.cgi?id=46800#c3
I've encountered this recently in an even more annoying form with SIMATIC WinCC V15.1 Runtime services. Although the spam is partially caused by other bugs (error paths), it completely bogs down the console when a prefix is bootstrapped (emitted by 'autostart' type service).
--- snip --- $ du -sh log.txt 1.4G log.txt
$ egrep "fixme:.*_Mtx_init_in_situ" log.txt | wc -l 97512
$ egrep "fixme:.*_Mtx_init_in_situ" log.txt | sort | uniq 0012:fixme:msvcp:_Mtx_init_in_situ unknown flags ignored: 102 0012:fixme:msvcp:_Mtx_init_in_situ unknown flags ignored: 2 001c:fixme:msvcp:_Mtx_init_in_situ unknown flags ignored: 1 001c:fixme:msvcp:_Mtx_init_in_situ unknown flags ignored: 2 001f:fixme:msvcp:_Mtx_init_in_situ unknown flags ignored: 2 0021:fixme:msvcp:_Mtx_init_in_situ unknown flags ignored: 2 0022:fixme:msvcp:_Mtx_init_in_situ unknown flags ignored: 2 004a:fixme:msvcp:_Mtx_init_in_situ unknown flags ignored: 102 004e:fixme:msvcp:_Mtx_init_in_situ unknown flags ignored: 2 --- snip ---
--- snip --- 001c:Call msvcp140._Cnd_init_in_situ(0025bcc8) ret=1400b97a8 001c:Call ntdll.RtlInitializeConditionVariable(0025bcc8) ret=7f168a0b198f 001c:Ret ntdll.RtlInitializeConditionVariable() retval=0025bcc8 ret=7f168a0b198f 001c:Ret msvcp140._Cnd_init_in_situ() retval=00000044 ret=1400b97a8 001c:Call msvcp140._Mtx_init_in_situ(0025bd10,00000002) ret=1400b97b8 001c:fixme:msvcp:_Mtx_init_in_situ unknown flags ignored: 2 001c:Call msvcr120.??0critical_section@Concurrency@@QEAA@XZ(0025bd18) ret=7f168a0b1629 001c:Ret msvcr120.??0critical_section@Concurrency@@QEAA@XZ() retval=0025bd18 ret=7f168a0b1629 001c:Ret msvcp140._Mtx_init_in_situ() retval=0025bd10 ret=1400b97b8 ... 004a:Call msvcp110._Mtx_init(002626c8,00000102) ret=0091104c 004a:Call msvcr110.??2@YAPEAX_K@Z(00000048) ret=7f88bd859199 004a:Call ntdll.RtlAllocateHeap(00230000,00000000,00000048) ret=7f88c03b15ef 004a:Ret ntdll.RtlAllocateHeap() retval=00262710 ret=7f88c03b15ef 004a:Ret msvcr110.??2@YAPEAX_K@Z() retval=00262710 ret=7f88bd859199 004a:fixme:msvcp:_Mtx_init_in_situ unknown flags ignored: 102 004a:Call msvcr110.??0critical_section@Concurrency@@QEAA@XZ(00262718) ret=7f88bd85910a ... --- snip ---
Although this spam can masked/filtered out, it should be considered to implement the missing mutex types.
Currently Wine only supports C11 'mtx_recursive' mutex type (flags = 0x100).
Wine source:
https://source.winehq.org/git/wine.git/blob/HEAD:/dlls/msvcp90/misc.c#l684
--- snip --- 684 #define MTX_MULTI_LOCK 0x100 685 #define MTX_LOCKED 3 686 typedef struct 687 { 688 DWORD flags; 689 critical_section cs; 690 DWORD thread_id; 691 DWORD count; 692 } *_Mtx_t; 693 694 #if _MSVCP_VER >= 140 695 typedef _Mtx_t _Mtx_arg_t; 696 #define MTX_T_FROM_ARG(m) (m) 697 #define MTX_T_TO_ARG(m) (m) 698 #else 699 typedef _Mtx_t *_Mtx_arg_t; 700 #define MTX_T_FROM_ARG(m) (*(m)) 701 #define MTX_T_TO_ARG(m) (&(m)) 702 #endif 703 704 void __cdecl _Mtx_init_in_situ(_Mtx_t mtx, int flags) 705 { 706 if(flags & ~MTX_MULTI_LOCK) 707 FIXME("unknown flags ignored: %x\n", flags); 708 709 mtx->flags = flags; 710 call_func1(critical_section_ctor, &mtx->cs); 711 mtx->thread_id = -1; 712 mtx->count = 0; 713 } --- snip ---
From C11 standard (ISO/IEC 9899:2011):
https://en.cppreference.com/w/c/thread/mtx_init
NOTE: 'mtx_try' is not mentioned here anymore, see http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1521.htm
--- quote --- mtx_init
C Thread support library
Defined in header <threads.h>
int mtx_init( mtx_t* mutex, int type ); (since C11)
Creates a new mutex object with type. The object pointed to by mutex is set to an identifier of the newly created mutex.
type must have one of the following values:
mtx_plain - a simple, non-recursive mutex is created. mtx_timed - a non-recursive mutex, that supports timeout, is created. mtx_plain | mtx_recursive - a recursive mutex is created. mtx_timed | mtx_recursive - a recursive mutex, that supports timeout, is created.
Parameters mutex - pointer to the mutex to initialize type - the type of the mutex Return value
thrd_success if successful, thrd_error otherwise. References
C11 standard (ISO/IEC 9899:2011):
7.26.4.2 The mtx_init function (p: 381) --- quote ---
ftp://ftp.00f.net/misc/n1548.pdf
--- quote --- The enumeration constants are
mtx_plain
which is passed to mtx_init to create a mutex object that supports neither imeout nor test and return;
mtx_recursive
which is passed to mtx_initto create a mutex object that supports recursive locking;
mtx_timed
which is passed to mtx_init to create a mutex object that supports timeout;
mtx_try
which is passed to mtx_init to create a mutex object that supports test and return; --- quote ---
* mtx_plain = 0x1 * mtx_try = 0x2 * mtx_timed = 0x4 * mtx_recursive = 0x100
$ sha1sum SIMATIC_WinCC_Runtime_Advanced_V15_1.exe db1f97bb648b62fa1c5d974d7f2bcb6b4a9fd786 SIMATIC_WinCC_Runtime_Advanced_V15_1.exe
$ du -sh SIMATIC_WinCC_Runtime_Advanced_V15_1.exe 1.3G SIMATIC_WinCC_Runtime_Advanced_V15_1.exe
$ wine --version wine-4.4-188-gc988910cae
Regards