Whenever ReactOS finishes its operations onto the registry and unlocks it, a lazy flush is invoked to do an eventual flushing of the registry to the backing storage of the system. Except that... lazy flushing never comes into place.
This is because whenever CmpLazyFlush is called that sets up a timer which needs to expire in order to trigger the lazy flusher engine worker. However, registry locking/unlocking is a frequent occurrence, mainly when on desktop. Therefore as a matter of fact, CmpLazyFlush keeps removing and inserting the timer and the lazy flusher will never kick in that way.
Ironically the lazy flusher actually does the flushing when on USETUP installation phase because during text-mode setup installation in ReactOS the frequency of registry operations is actually less so the timer has the opportunity to expire and fire up the flusher.
In addition to that, we must queue a lazy flush when marking cells as dirty because such dirty data has to be flushed down to the media storage of the system. Of course, the real place where lazy flushing operation is done should be in a subset helper like HvMarkDirty that marks parts of a hive as dirty but since we do not have that, we'll be lazy flushing the registry during cells dirty marking instead for now.
CORE-18303
Addendum to commit de81021ba.
Otherwise, we get the following build error:
\ntoskrnl\kd64\kddata.c(532,5): error: initializer element is not a compile-time constant
PtrToUL64(RtlpBreakWithStatusInstruction),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
\ntoskrnl\kd64\kddata.c(526,26): note: expanded from macro 'PtrToUL64'
#define PtrToUL64(x) ((ULPTR64)(x))
^~~~~~~~~~~~
But the underlying GCC stupidity is still there (15 years later).
However, enable it only in 32-bit GCC builds, not in 64-bits nor with MSVC.
See commit b9cd3f2d9 (r25845) for some details.
GCC is indeed still incapable of casting 32-bit pointers up to 64-bits,
when static-initializing arrays (**outside** a function) without emitting
the error:
"error: initializer element is not constant"
(which might somehow indicate it actually tries to generate executable
code for casting the pointers, instead of doing it at compile-time).
Going down the rabbit hole, other stupidities show up:
Our PVOID64 type and the related POINTER_64 (in 32-bit archs), or the
PVOID32 and POINTER_32 (in 64-bit archs), are all silently broken in
GCC builds, because the pointer size attributes __ptr64 and __ptr32,
which are originally MSVC-specific, are defined to nothing in _mingw.h.
(And similarly for the __uptr and __sptr sign-extension attributes.)
Clang and other sane ompilers has since then implemented those (enabled
with -fms-extensions), but not GCC. The closest thing that could exist
for GCC is to do:
#define __ptr64 __attribute__((mode(DI)))
in order to get a 64-bit-sized pointer type with
typedef void* __ptr64 PVOID64;
but even this does not work, with the error:
"error: invalid pointer mode 'DI'"
Makefile.am: this hasn't been updated in a while
security.c: WIN32 -> _WIN32 to keep the ROS-diff consistent with the rest
win32config.h/libxslt.h: remove unnecessary ROS-diff
xsltwin32config.h: this was missed in the 1.1.34 sync
xsltexports.h: mark a ROS-diff as such
This fixes starting the Windows 2000 POSIX subsystem in ReactOS.
- The CreateSession pointer was initialized against the SbApiMsg variable, but
it was the other SbApiMsg2 that was being initialized and sent through LPC.
- Do not overwrite the MuSessionId (Terminal Services session ID) variable with
the generated environment subsystem session ID from SmpAllocateSessionId().
- Actually initialize the SbApiMsg ApiNumber for the CreateSession LPC call.
(dll\win32\kernel32\client\proc.c:3690) Retrying with: POSIX /P C:\ReactOS\system32\posix\ls.exe /C ls
Breakpoint 1 hit
csrsrv!CsrSbApiRequestThread+0x64:
001b:1000ac34 837dfc00 cmp dword ptr [ebp-4],0
kd> ??ReceiveMsg
struct _SB_API_MSG
+0x000 h : _PORT_MESSAGE
+0x018 ConnectionInfo : _SB_CONNECTION_INFO
+0x018 ApiNumber : 0xcccccccc (No matching name)
+0x01c ReturnValue : 0n0
+0x020 u : <unnamed-tag>
kd> p
...
(base\system\smss\smsubsys.c:393) SMSS: SmpLoadSubSystem - NtRequestWaitReplyPort Failed with Status c0000002 for sessionid 2
...
<Retrying>
...
(base\system\smss\smsubsys.c:393) SMSS: SmpLoadSubSystem - NtRequestWaitReplyPort Failed with Status c0000002 for sessionid 3
All those bugs could have been avoided *IF*, rather than (badly) duplicating
its code, the existing SmpSbCreateSession() function had been used instead.
- "Not sure these field mean what I think they do -- but clear them" ... ◔_◔
Those fields are related to the debug client interface (DbgUi) and session
in case the subsystem being started is going to be debugged. These have
nothing to do with the MuSessionId. Clarify this in the SB_CREATE_SESSION_MSG
structure and in the SmpSbCreateSession() function.
Loosely based on the deprecated ReactOS-specific SmExecuteProgram().
On server-side, we lookup into the list of deferred subsystems that
has been initialized at init time.
Dedicated to Justin Miller (The_DarkFire) work on reviving the
POSIX subsystem!
This DLL was exporting legacy NT-incompatible or ROS-specific SM client
functions, that have been since 10 years now (2012) replaced by the new
NT-compatible SM:
- SmConnectApiPort(): was just SmConnectToSm().
- SmCompleteSession():
The legacy SMSS used it for when a subsystem initialization was finished.
Now (NT-compatible) this function is called by subsystems **only** when a
subsystem session **terminates**: SmSessionComplete().
- SmExecuteProgram(): was just the client side of SmLoadDeferedSubSystem()
(whose server side is not implemented yet). The legacy SM "old" SmExecPgm
implementation actually was "SmLoadDeferedSubSystem"...
- SmLookupSubsystem(): is a utility-only function to read any registry value
inside "Session Manager\SubSystems".
Move SMDLL's readme into SMLIB and update its contents.
Collect some residual useful functions into smutils.c (and moved in SMLIB,
though not compiled yet):
- SmExecuteProgram(), now implemented as a wrapper around SmExecPgm();
- SmLookupSubsystem(), described above;
- SmQueryInformation(), that retrieves a list of currently-running subsystems.
[SMLIB] Validate SbApiPortName's length in SmConnectToSm().
Fix CommandLine length validation in SmStartCsr().
Add documentation (+ SAL annotations) to the NT-compatible SMSS client functions.
smmsg.h: Add both Win32 and Win64 struct sizes C_ASSERTs for those whose size
change between these two processor architecture sizes.
[SMLIB] Introduce SmSendMsgToSm() as helper to send data into the SM LPC port.
+ Make the other API functions use it.
It should be observed that in Vista+, both functions SmConnectToSm() and this
new SmSendMsgToSm() are exported by NTDLL under the names RtlConnectToSm()
and RtlSendMsgToSm() (and use the same signature).
See: https://www.geoffchappell.com/studies/windows/win32/ntdll/history/names60.htm
[NTDLL] Correctly stub RtlConnectToSm() and RtlSendMsgToSm().
[NTDLL_VISTA] Link to SMLIB and simply export RtlConnectToSm() and RtlSendMsgToSm().
