7 Aug 2010

Author: sir_richard
Date: Sat Aug  7 05:02:58 2010
New Revision: 48475

URL: http://svn.reactos.org/svn/reactos?rev=48475&view=rev
Log:
[KERNEL32]: While working on the CMAKE branch, Amine and myself discovered a rather
serious issue in kernel32 (and perhaps other libraries as well). Unlike rbuild, CMake does
not allow you to export non-existant DLL functions (try it: add "poopyhead" in
kernel32's exports under RBuild, and will it export "poopyhead", God knowing
what that will actually link to).
            As an additional feature on top of the "allow non-existing functions to
be exported" "feature", because rbuild generates and links STDCALL function
names without the proper decoration (vs. enforcing decoration at linking, but only
removing it at export-time), this allows the definition (as an export) of a STDCALL
function that is completely different from the actual function itself.
            For example, the 5-parameter Foo function is normally Foo@20, while the
3-parameter Foo function woudl be Foo@12. Linking one against the other would fail (say, 2
parameters were added to Foo in a newer version). However, under RBUILD, both of these
would appear as "Foo", and the linker/compiler would happilly connect the caller
of Foo@3 (that has pushed 3 parameters) to the receiving side of Foo@5 (that is about to
pop 5 parameters).
            Even -if- decorations WERE to be applied, Foo@12 would STILL succeed, because
of the first feature, which would enable the export of Foo@12 even though no such function
exist.
            In a further, bizare, twist of fate, the behavior of this RBUILD
"feature", when the target function is not found, is to link the exported DLL TO
ITSELF.
            Therefore, one can see how, previously to this patch, kernel32.dll would
import a dozen functions from itself (all the non-existing functions).
            To really seal the deal, the behavior of exported functions used by kernel32,
but that are actually forwarded to another DLL deserves a special mention.
            GetLastError, for example, merely forwards to RtlGetLastWin32Error, so it is
normal behavior to use a #define in the C code so that all internal calls to the function
are routed correctly.
            This did not happen, so instead, kernel32 tried importing/linking/exporting
GetLastError, but this symbol is not found in the binary, because it is only a forwarder.
            This caused kernel32 to import from itself (the behavior when an exported
symbol is not found). When importing from itself, the loader would now find the
_forwarded_ for GetLastError, and correctly link with ntdll.
            What should be a one-liner of assembly (inline TEB access) thus became a
triple-call indirection
(GetLastError@0->StubLastError@0->__impGetLastError@0->__impRtlGetLastWin32Error->RtlGetLastWin32Error.
            While analyzing these issues, we also realized a strange macro
SetLastErrorByStatus that manually tried to perform what there already exists a function
for: RtlSetLastNtStatusFromWin32Error.
	    And, in an exciting coda, we also realized that our Server 2003 Kernel32 exports more
than a dozen Windows 95 APIs, through an auto-stub generation mechanism within winebuild,
that gets linked as an object behind the scenes.
[KERNEL32]: Removed all Win95 exports, cleaned up exports.
[KERNEL32]: Fixed up set/get error macros by making them inline and/or calling the correct
ntdll function.
[KERNEL32]: Removed bizare calls to Wine-internal/specific APIs from our core Win32 DLL.
[KERNEL32]: Wrote stubs for all functions which should be exported, and set the correct
number of parameters for them.
[KERNEL32]: Kernel32 is smaller, loads faster, does not export Windows 95 functions, does
not export non-existing functions, and does not import from itself anymore.
Note: This is one of the many failings of RBUILD the CMAKE system has helped us discover.
I believe these issues are serious enough to warrant an immediate sync with trunk, but
rest assured, there are many more completely broken, infinitely-regressing things that we
discovered while switching to CMAKE.


Added:
    trunk/reactos/dll/win32/kernel32/kernel32.def
      - copied, changed from r48474, trunk/reactos/dll/win32/kernel32/kernel32.pspec
Removed:
    trunk/reactos/dll/win32/kernel32/kernel32.pspec
Modified:
    trunk/reactos/dll/win32/kernel32/file/backup.c
    trunk/reactos/dll/win32/kernel32/file/bintype.c
    trunk/reactos/dll/win32/kernel32/file/cnotify.c
    trunk/reactos/dll/win32/kernel32/file/copy.c
    trunk/reactos/dll/win32/kernel32/file/create.c
    trunk/reactos/dll/win32/kernel32/file/curdir.c
    trunk/reactos/dll/win32/kernel32/file/delete.c
    trunk/reactos/dll/win32/kernel32/file/dir.c
    trunk/reactos/dll/win32/kernel32/file/dosdev.c
    trunk/reactos/dll/win32/kernel32/file/file.c
    trunk/reactos/dll/win32/kernel32/file/find.c
    trunk/reactos/dll/win32/kernel32/file/hardlink.c
    trunk/reactos/dll/win32/kernel32/file/iocompl.c
    trunk/reactos/dll/win32/kernel32/file/lfile.c
    trunk/reactos/dll/win32/kernel32/file/lock.c
    trunk/reactos/dll/win32/kernel32/file/mailslot.c
    trunk/reactos/dll/win32/kernel32/file/move.c
    trunk/reactos/dll/win32/kernel32/file/npipe.c
    trunk/reactos/dll/win32/kernel32/file/pipe.c
    trunk/reactos/dll/win32/kernel32/file/rw.c
    trunk/reactos/dll/win32/kernel32/file/tape.c
    trunk/reactos/dll/win32/kernel32/file/volume.c
    trunk/reactos/dll/win32/kernel32/include/kernel32.h
    trunk/reactos/dll/win32/kernel32/kernel32.rbuild
    trunk/reactos/dll/win32/kernel32/misc/actctx.c
    trunk/reactos/dll/win32/kernel32/misc/console.c
    trunk/reactos/dll/win32/kernel32/misc/format_msg.c
    trunk/reactos/dll/win32/kernel32/misc/lcformat.c
    trunk/reactos/dll/win32/kernel32/misc/stubs.c
    trunk/reactos/dll/win32/kernel32/misc/version.c
    trunk/reactos/dll/win32/kernel32/process/session.c

[This mail would be too long, it was shortened to contain the URLs only.]

Modified: trunk/reactos/dll/win32/kernel32/file/backup.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/ba…

Modified: trunk/reactos/dll/win32/kernel32/file/bintype.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/bi…

Modified: trunk/reactos/dll/win32/kernel32/file/cnotify.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/cn…

Modified: trunk/reactos/dll/win32/kernel32/file/copy.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/co…

Modified: trunk/reactos/dll/win32/kernel32/file/create.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/cr…

Modified: trunk/reactos/dll/win32/kernel32/file/curdir.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/cu…

Modified: trunk/reactos/dll/win32/kernel32/file/delete.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/de…

Modified: trunk/reactos/dll/win32/kernel32/file/dir.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/di…

Modified: trunk/reactos/dll/win32/kernel32/file/dosdev.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/do…

Modified: trunk/reactos/dll/win32/kernel32/file/file.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/fi…

Modified: trunk/reactos/dll/win32/kernel32/file/find.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/fi…

Modified: trunk/reactos/dll/win32/kernel32/file/hardlink.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/ha…

Modified: trunk/reactos/dll/win32/kernel32/file/iocompl.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/io…

Modified: trunk/reactos/dll/win32/kernel32/file/lfile.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/lf…

Modified: trunk/reactos/dll/win32/kernel32/file/lock.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/lo…

Modified: trunk/reactos/dll/win32/kernel32/file/mailslot.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/ma…

Modified: trunk/reactos/dll/win32/kernel32/file/move.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/mo…

Modified: trunk/reactos/dll/win32/kernel32/file/npipe.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/np…

Modified: trunk/reactos/dll/win32/kernel32/file/pipe.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/pi…

Modified: trunk/reactos/dll/win32/kernel32/file/rw.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/rw…

Modified: trunk/reactos/dll/win32/kernel32/file/tape.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/ta…

Modified: trunk/reactos/dll/win32/kernel32/file/volume.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/vo…

Modified: trunk/reactos/dll/win32/kernel32/include/kernel32.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/include…

Copied: trunk/reactos/dll/win32/kernel32/kernel32.def (from r48474,
trunk/reactos/dll/win32/kernel32/kernel32.pspec)
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/kernel3…

Removed: trunk/reactos/dll/win32/kernel32/kernel32.pspec
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/kernel3…

Modified: trunk/reactos/dll/win32/kernel32/kernel32.rbuild
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/kernel3…

Modified: trunk/reactos/dll/win32/kernel32/misc/actctx.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/misc/ac…

Modified: trunk/reactos/dll/win32/kernel32/misc/console.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/misc/co…

Modified: trunk/reactos/dll/win32/kernel32/misc/format_msg.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/misc/fo…

Modified: trunk/reactos/dll/win32/kernel32/misc/lcformat.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/misc/lc…

Modified: trunk/reactos/dll/win32/kernel32/misc/stubs.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/misc/st…

Modified: trunk/reactos/dll/win32/kernel32/misc/version.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/misc/ve…

Modified: trunk/reactos/dll/win32/kernel32/process/session.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/process…

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