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Issue #1809: update DLL directory for 32-bit plug-in run from 64-bit...

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... Windows installation of GIMP.

Our default installer installs 32-bit version of the various DLLs in
32/bin/ (under the installation prefix). Currently this additional
folder is simply added in the PATH, so it works most of the time.
Unfortunately the PATH is searched last for DLLs, and in particular, it
is searched after system directories. So it means that if any misbehaved
application is installing DLLs in system dirs (and in particular
incompatible/older versions of the same DLLs a GIMP plug-in uses), it
breaks the 32-bit plug-in.

SetDllDirectoryW() bypasses this order and the set folder is searched in
between the binary directory and the system dirs. We were already
setting this for our main bin/ directory, which was good for 64-bit
plug-ins, but this was not protecting 32-bit plug-ins. Now our code to
run plug-ins check the bitness of the executable before running it, and
updates the DLL folder accordingly.
The alternative 32-bit folder can be overridden by the configure option
--with-win32-32bit-dll-folder (default: 32/bin/). This option can only
be set when building for 64-bit Windows obviously.

Alternatively we could have put copies of 32-bit DLLs in a subfolder
with each 32-bit plug-in, but this is at best a terrible workaround, as
we would duplicate DLLs for every such case. And this would not have
protected third-party plug-ins which wish to use some of our DLLs.
Last alternative is to use AddDllDirectory(), but it works since Windows
7 with a given update only. And our current official support is any
Windows since Windows 7. So we don't want to use this right now (also
I'm not sure it would actually be much better than current
implementation, and it seems to have a bit more limitations than
SetDllDirectoryW(), though I have not tested).
This commit is contained in:
Jehan 2018-08-15 13:52:51 +02:00
parent ec79b5c9bc
commit 91c139f4d0
2 changed files with 109 additions and 30 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

50
app/plug-in/gimpplugin.c
View file

@ -108,6 +108,9 @@ static gboolean gimp_plug_in_flush (GIOChannel *channel,
static gboolean gimp_plug_in_recv_message (GIOChannel *channel,
GIOCondition cond,
gpointer data);
#if defined G_OS_WIN32 && defined WIN32_32BIT_DLL_FOLDER
static void gimp_plug_in_set_dll_directory (const gchar *path);
#endif
@ -360,6 +363,9 @@ gimp_plug_in_open (GimpPlugIn *plug_in,
/* Fork another process. We'll remember the process id so that we
* can later use it to kill the filter if necessary.
*/
#if defined G_OS_WIN32 && defined WIN32_32BIT_DLL_FOLDER
gimp_plug_in_set_dll_directory (argv[0]);
#endif
if (! gimp_spawn_async (argv, envp, spawn_flags, &plug_in->pid, &error))
{
gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
@ -398,6 +404,10 @@ gimp_plug_in_open (GimpPlugIn *plug_in,
cleanup:
#if defined G_OS_WIN32 && defined WIN32_32BIT_DLL_FOLDER
gimp_plug_in_set_dll_directory (NULL);
#endif
if (debug)
g_free (argv);
@ -721,6 +731,46 @@ gimp_plug_in_flush (GIOChannel *channel,
return TRUE;
}
#if defined G_OS_WIN32 && defined WIN32_32BIT_DLL_FOLDER
static void
gimp_plug_in_set_dll_directory (const gchar *path)
{
const gchar *install_dir;
gchar *bin_dir;
LPWSTR w_bin_dir;
DWORD BinaryType;
int n;
w_bin_dir = NULL;
install_dir = gimp_installation_directory ();
if (path &&
GetBinaryTypeA (path, &BinaryType) &&
BinaryType == SCS_32BIT_BINARY)
bin_dir = g_build_filename (install_dir, WIN32_32BIT_DLL_FOLDER, NULL);
else
bin_dir = g_build_filename (install_dir, "bin", NULL);
n = MultiByteToWideChar (CP_UTF8, MB_ERR_INVALID_CHARS,
bin_dir, -1, NULL, 0);
if (n == 0)
goto out;
w_bin_dir = g_malloc_n (n + 1, sizeof (wchar_t));
n = MultiByteToWideChar (CP_UTF8, MB_ERR_INVALID_CHARS,
bin_dir, -1,
w_bin_dir, (n + 1) * sizeof (wchar_t));
if (n == 0)
goto out;
SetDllDirectoryW (w_bin_dir);
out:
if (w_bin_dir)
g_free ((void*) w_bin_dir);
g_free (bin_dir);
}
#endif
GimpPlugInProcFrame *
gimp_plug_in_get_proc_frame (GimpPlugIn *plug_in)
{

89
configure.ac
View file

@ -935,6 +935,34 @@ if test "x$enable_win32_debug_console" = "xyes"; then
fi
AC_MSG_RESULT([$enable_win32_debug_console])
######################################
# Check for 32-bit DLLs (Win32 64-bit)
######################################
AC_ARG_WITH(win32-32bit-dll-folder,
[ --with-win32-32bit-dll-folder[=DIR]
alternative folder with 32-bit versions of DLL libraries on Windows (default: 32/bin/)],,
with_win32_32bit_dll_folder="32/bin")
AC_MSG_CHECKING([the alternative folder containing 32-bit DLLs on Windows])
if test "x$platform_win32" = "xyes"; then
case "$host_cpu" in
x86_64)
;;
*)
with_win32_32bit_dll_folder="no"
;;
esac
else
with_win32_32bit_dll_folder="no"
fi
if test "x$with_win32_32bit_dll_folder" != "xno"; then
AC_DEFINE_UNQUOTED(WIN32_32BIT_DLL_FOLDER, "$with_win32_32bit_dll_folder",
[Define if 32-bit versions of libraries are packaged in an alternative folder])
fi
AC_MSG_RESULT([$with_win32_32bit_dll_folder])
#####################
# Check for Dr. Mingw
#####################
@ -2895,44 +2923,45 @@ generate_po_makefile([po-windows-installer])
# Print a summary of features enabled/disabled:
optional_deps="
Extra Binaries:
gimp-console: $enable_gimp_console
gimp-console: $enable_gimp_console
Optional Features:
Language selection: $have_iso_codes
Vector icons: $enable_vector_icons
Dr. Mingw (Win32): $enable_drmingw
Relocatable bundle: $enable_relocatable_bundle
Default ICC directory: $with_icc_directory
Debug console (Win32): $enable_win32_debug_console
Language selection: $have_iso_codes
Vector icons: $enable_vector_icons
Dr. Mingw (Win32): $enable_drmingw
Relocatable bundle: $enable_relocatable_bundle
Default ICC directory: $with_icc_directory
Debug console (Win32): $enable_win32_debug_console
32-bit DLL folder (Win32): $with_win32_32bit_dll_folder
Optional Plug-Ins:
Ascii Art: $have_libaa
Ghostscript: $have_gs
Help Browser: $have_webkit
JPEG 2000: $have_openjpeg
MNG: $have_libmng
OpenEXR: $have_openexr
WebP: $have_webp
Heif: $have_libheif
PDF (export): $have_cairo_pdf
Print: $enable_print
Python 2: $enable_python
TWAIN (Win32): $os_win32
Webpage: $have_webkit
WMF: $have_libwmf
X11 Mouse Cursor: $have_xmc
XPM: $have_libxpm
Email: $have_email
Ascii Art: $have_libaa
Ghostscript: $have_gs
Help Browser: $have_webkit
JPEG 2000: $have_openjpeg
MNG: $have_libmng
OpenEXR: $have_openexr
WebP: $have_webp
Heif: $have_libheif
PDF (export): $have_cairo_pdf
Print: $enable_print
Python 2: $enable_python
TWAIN (Win32): $os_win32
Webpage: $have_webkit
WMF: $have_libwmf
X11 Mouse Cursor: $have_xmc
XPM: $have_libxpm
Email: $have_email
Optional Modules:
ALSA (MIDI Input): $have_alsa
Linux Input: $have_linux_input (GUdev support: $have_libgudev)
DirectInput (Win32): $have_dx_dinput
ALSA (MIDI Input): $have_alsa
Linux Input: $have_linux_input (GUdev support: $have_libgudev)
DirectInput (Win32): $have_dx_dinput
Tests:
Use xvfb-run $have_xvfb_run
Test appdata $have_appstream_util
Test desktop file $have_desktop_file_validate
Use xvfb-run $have_xvfb_run
Test appdata $have_appstream_util
Test desktop file $have_desktop_file_validate
Bug report URL: $with_bug_report_url
$override_bug_report_url$have_recommended_gtk$warning_vector_icons_windows$warning_glib_networking$warning_gcc"