Repository.mk                                |    2 
 bridges/Library_cpp_uno.mk                   |    3 
 bridges/Module_bridges.mk                    |    2 
 bridges/source/cpp_uno/gcc3_wasm/cpp2uno.cxx |   47 +++++++++++++
 bridges/source/cpp_uno/gcc3_wasm/except.cxx  |   22 ++++++
 bridges/source/cpp_uno/gcc3_wasm/uno2cpp.cxx |   93 +++++++++++++++++++++++++++
 cppu/source/uno/lbmap.cxx                    |    1 
 cppuhelper/source/exc_thrower.cxx            |   17 +++-
 cppuhelper/source/paths.cxx                  |    4 -
 9 files changed, 180 insertions(+), 11 deletions(-)

New commits:
commit c367a2781f99ed22d0f7d64184fb567aacc43f35
Author:     Thorsten Behrens <thorsten.behr...@allotropia.de>
AuthorDate: Sat Sep 25 18:03:31 2021 +0200
Commit:     Jan-Marek Glogowski <glo...@fbihome.de>
CommitDate: Wed Jan 19 14:26:09 2022 +0100

    WASM UNO: add a minimal dummy bridge
    
    ... and use the same fake exception rethrowing code then the
    mobile platforms.
    
    Change-Id: Ic90de1cfd1e0092d6064d041a613d60d9f5f76b5
    Reviewed-on: https://gerrit.libreoffice.org/c/core/+/128596
    Tested-by: Jenkins
    Reviewed-by: Jan-Marek Glogowski <glo...@fbihome.de>

diff --git a/Repository.mk b/Repository.mk
index 895d99fbadc2..fd83898e9426 100644
--- a/Repository.mk
+++ b/Repository.mk
@@ -572,13 +572,11 @@ $(eval $(call 
gb_Helper_register_libraries_for_install,PLAINLIBS_URE,ure, \
 ))
 
 $(eval $(call gb_Helper_register_plugins_for_install,PLAINLIBS_URE,ure, \
-       $(if $(filter EMSCRIPTEN,$(OS)),, \
                $(if $(filter MSC,$(COM)), \
                        $(if $(filter INTEL,$(CPUNAME)),msci_uno) \
                        $(if $(filter X86_64,$(CPUNAME)),mscx_uno) \
                        $(if $(filter AARCH64,$(CPUNAME)),msca_uno) \
                , gcc3_uno) \
-       ) \
 ))
 
 $(eval $(call gb_Helper_register_libraries_for_install,PRIVATELIBS_URE,ure, \
diff --git a/bridges/Library_cpp_uno.mk b/bridges/Library_cpp_uno.mk
index 7c713f7ed1f4..e2de3c1678b4 100644
--- a/bridges/Library_cpp_uno.mk
+++ b/bridges/Library_cpp_uno.mk
@@ -85,6 +85,9 @@ else ifeq ($(COM),MSC)
 bridges_SELECTED_BRIDGE := msvc_win32_intel
 bridge_exception_objects := cpp2uno uno2cpp
 bridge_noopt_objects := except
+else ifeq ($(OS),EMSCRIPTEN)
+bridges_SELECTED_BRIDGE := gcc3_wasm
+bridge_noopt_objects := cpp2uno except uno2cpp
 endif
 
 else ifeq ($(CPUNAME),M68K)
diff --git a/bridges/Module_bridges.mk b/bridges/Module_bridges.mk
index 1c7fb1789b8e..3016bf2c404f 100644
--- a/bridges/Module_bridges.mk
+++ b/bridges/Module_bridges.mk
@@ -9,7 +9,6 @@
 
 $(eval $(call gb_Module_Module,bridges))
 
-ifneq ($(OS),EMSCRIPTEN)
 $(eval $(call gb_Module_add_targets,bridges,\
        Library_cpp_uno \
        $(if $(ENABLE_JAVA),\
@@ -30,6 +29,5 @@ else ifneq ($(words $(bridges_SELECTED_BRIDGE)),1)
 $(call gb_Output_error,multiple bridges selected for build: 
$(bridges_SELECTED_BRIDGE))
 endif
 endif
-endif
 
 # vim: set noet sw=4 ts=4:
diff --git a/bridges/source/cpp_uno/gcc3_wasm/cpp2uno.cxx 
b/bridges/source/cpp_uno/gcc3_wasm/cpp2uno.cxx
new file mode 100644
index 000000000000..fd7fa817588a
--- /dev/null
+++ b/bridges/source/cpp_uno/gcc3_wasm/cpp2uno.cxx
@@ -0,0 +1,47 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <typelib/typedescription.hxx>
+#include <vtablefactory.hxx>
+
+using namespace ::com::sun::star::uno;
+
+using bridges::cpp_uno::shared::VtableFactory;
+
+struct VtableFactory::Slot
+{
+};
+
+VtableFactory::Slot* VtableFactory::mapBlockToVtable(void* block)
+{
+    return static_cast<Slot*>(block) + 2;
+}
+
+std::size_t VtableFactory::getBlockSize(sal_Int32 slotCount)
+{
+    return (slotCount + 2) * sizeof(Slot);
+}
+
+VtableFactory::Slot* VtableFactory::initializeBlock(void* block, sal_Int32 
slotCount, sal_Int32,
+                                                    
typelib_InterfaceTypeDescription*)
+{
+    Slot* slots = mapBlockToVtable(block);
+    return slots + slotCount;
+}
+
+unsigned char* VtableFactory::addLocalFunctions(Slot**, unsigned char*,
+                                                
typelib_InterfaceTypeDescription const*, sal_Int32,
+                                                sal_Int32, sal_Int32)
+{
+    std::abort();
+}
+
+void VtableFactory::flushCode(unsigned char const*, unsigned char const*) {}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/bridges/source/cpp_uno/gcc3_wasm/except.cxx 
b/bridges/source/cpp_uno/gcc3_wasm/except.cxx
new file mode 100644
index 000000000000..36778c65a11a
--- /dev/null
+++ b/bridges/source/cpp_uno/gcc3_wasm/except.cxx
@@ -0,0 +1,22 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <cstdlib>
+
+#include <uno/mapping.h>
+#include <uno/any2.h>
+
+namespace CPPU_CURRENT_NAMESPACE
+{
+void raiseException(uno_Any*, uno_Mapping*) { std::abort(); }
+
+void fillUnoException(uno_Any*, uno_Mapping*) { std::abort(); }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/bridges/source/cpp_uno/gcc3_wasm/uno2cpp.cxx 
b/bridges/source/cpp_uno/gcc3_wasm/uno2cpp.cxx
new file mode 100644
index 000000000000..ddb51166b51e
--- /dev/null
+++ b/bridges/source/cpp_uno/gcc3_wasm/uno2cpp.cxx
@@ -0,0 +1,93 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <com/sun/star/uno/RuntimeException.hpp>
+
+#include <bridge.hxx>
+#include <types.hxx>
+#include <unointerfaceproxy.hxx>
+#include <vtables.hxx>
+
+using namespace ::com::sun::star::uno;
+
+namespace bridges::cpp_uno::shared
+{
+void unoInterfaceProxyDispatch(uno_Interface* pUnoI, const 
typelib_TypeDescription* pMemberDescr,
+                               void* pReturn, void* pArgs[], uno_Any** 
ppException)
+{
+    bridges::cpp_uno::shared::UnoInterfaceProxy* pThis
+        = static_cast<bridges::cpp_uno::shared::UnoInterfaceProxy*>(pUnoI);
+
+    switch (pMemberDescr->eTypeClass)
+    {
+        case typelib_TypeClass_INTERFACE_ATTRIBUTE:
+        {
+            std::abort();
+            break;
+        }
+        case typelib_TypeClass_INTERFACE_METHOD:
+        {
+            VtableSlot aVtableSlot(getVtableSlot(
+                reinterpret_cast<typelib_InterfaceMethodTypeDescription 
const*>(pMemberDescr)));
+
+            switch (aVtableSlot.index)
+            {
+                case 1: // acquire uno interface
+                    (*pUnoI->acquire)(pUnoI);
+                    *ppException = 0;
+                    break;
+                case 2: // release uno interface
+                    (*pUnoI->release)(pUnoI);
+                    *ppException = 0;
+                    break;
+                case 0: // queryInterface() opt
+                {
+                    typelib_TypeDescription* pTD = 0;
+                    TYPELIB_DANGER_GET(&pTD, 
reinterpret_cast<Type*>(pArgs[0])->getTypeLibType());
+                    if (pTD)
+                    {
+                        uno_Interface* pInterface = 0;
+                        
(*pThis->getBridge()->getUnoEnv()->getRegisteredInterface)(
+                            pThis->getBridge()->getUnoEnv(), 
(void**)&pInterface, pThis->oid.pData,
+                            (typelib_InterfaceTypeDescription*)pTD);
+
+                        if (pInterface)
+                        {
+                            
::uno_any_construct(reinterpret_cast<uno_Any*>(pReturn), &pInterface,
+                                                pTD, 0);
+                            (*pInterface->release)(pInterface);
+                            TYPELIB_DANGER_RELEASE(pTD);
+                            *ppException = 0;
+                            break;
+                        }
+                        TYPELIB_DANGER_RELEASE(pTD);
+                    }
+                } // else perform queryInterface()
+                    [[fallthrough]];
+                default:
+                    std::abort();
+            }
+            break;
+        }
+        default:
+        {
+            ::com::sun::star::uno::RuntimeException aExc(
+                "illegal member type description!",
+                
::com::sun::star::uno::Reference<::com::sun::star::uno::XInterface>());
+
+            Type const& rExcType = cppu::UnoType<decltype(aExc)>::get();
+            // binary identical null reference
+            ::uno_type_any_construct(*ppException, &aExc, 
rExcType.getTypeLibType(), 0);
+        }
+    }
+}
+
+} // namespace bridges::cpp_uno::shared
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/cppu/source/uno/lbmap.cxx b/cppu/source/uno/lbmap.cxx
index 585082ac1d06..43818eb85025 100644
--- a/cppu/source/uno/lbmap.cxx
+++ b/cppu/source/uno/lbmap.cxx
@@ -421,6 +421,7 @@ static Mapping loadExternalMapping(
             OSL_ASSERT( aExt.is() );
             if (aExt.is())
                 return aExt;
+            SAL_INFO("cppu", "Could not load external mapping for " << aName);
         }
 #else
         // find proper lib
diff --git a/cppuhelper/source/exc_thrower.cxx 
b/cppuhelper/source/exc_thrower.cxx
index 1bb8bfab13b3..c0d441fcd48b 100644
--- a/cppuhelper/source/exc_thrower.cxx
+++ b/cppuhelper/source/exc_thrower.cxx
@@ -168,9 +168,15 @@ ExceptionThrower::ExceptionThrower()
     uno_Interface::pDispatcher = ExceptionThrower_dispatch;
 }
 
+#if defined(IOS) || (defined(__aarch64__) && defined(ANDROID)) || 
defined(EMSCRIPTEN)
+#define RETHROW_FAKE_EXCEPTIONS 1
+#else
+#define RETHROW_FAKE_EXCEPTIONS 0
+#endif
+
 class theExceptionThrower : public rtl::Static<ExceptionThrower, 
theExceptionThrower> {};
 
-#if defined(IOS) || (defined(__aarch64__) && defined(ANDROID))
+#if RETHROW_FAKE_EXCEPTIONS
 // In the native iOS / Android app, where we don't have any Java, Python,
 // BASIC, or other scripting, the only thing that would use the C++/UNO bridge
 // functionality that invokes codeSnippet() was cppu::throwException().
@@ -208,7 +214,7 @@ void lo_mobile_throwException(css::uno::Any const& 
aException)
 
     assert(false);
 }
-#endif // defined(IOS) || (defined(__aarch64__) && defined(ANDROID))
+#endif // RETHROW_FAKE_EXCEPTIONS
 
 } // anonymous namespace
 
@@ -226,7 +232,7 @@ void SAL_CALL throwException( Any const & exc )
             "(must be derived from com::sun::star::uno::Exception)!" );
     }
 
-#if defined(IOS) || (defined(__aarch64__) && defined(ANDROID))
+#if RETHROW_FAKE_EXCEPTIONS
     lo_mobile_throwException(exc);
 #else
     Mapping uno2cpp(Environment(UNO_LB_UNO), Environment::getCurrent());
@@ -243,13 +249,14 @@ void SAL_CALL throwException( Any const & exc )
         ExceptionThrower::getCppuType() );
     OSL_ASSERT( xThrower.is() );
     xThrower->throwException( exc );
-#endif
+#endif // !RETHROW_FAKE_EXCEPTIONS
 }
 
 
 Any SAL_CALL getCaughtException()
 {
-#if defined(__aarch64__) && defined(ANDROID)
+    // why does this differ from RETHROW_FAKE_EXCEPTIONS?
+#if (defined(__aarch64__) && defined(ANDROID)) || defined(EMSCRIPTEN)
     // FIXME This stuff works on 32bit ARM, let's use the shortcut only for
     // the 64bit ARM.
     return Any();
diff --git a/cppuhelper/source/paths.cxx b/cppuhelper/source/paths.cxx
index 785fa452d30b..d2f37bb549a7 100644
--- a/cppuhelper/source/paths.cxx
+++ b/cppuhelper/source/paths.cxx
@@ -33,7 +33,7 @@
 
 namespace {
 
-#ifndef ANDROID
+#if !(defined ANDROID || defined EMSCRIPTEN)
 OUString get_this_libpath() {
     static OUString s_uri = []() {
         OUString uri;
@@ -52,7 +52,7 @@ OUString get_this_libpath() {
 }
 
 OUString cppu::getUnoIniUri() {
-#if defined ANDROID
+#if defined ANDROID || defined EMSCRIPTEN
     // Wouldn't it be lovely to avoid this ugly hard-coding.
     // The problem is that the 'create_bootstrap_macro_expander_factory()'
     // required for bootstrapping services, calls cppu::get_unorc directly

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