1 files changed, 138 insertions, 0 deletions
diff --git a/xpcom/build/FrozenFunctions.cpp b/xpcom/build/FrozenFunctions.cpp
new file mode 100644
index 000000000..8a957ca45
--- /dev/null
+++ b/xpcom/build/FrozenFunctions.cpp
@@ -0,0 +1,138 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "nsXPCOM.h"
+#include "nsXPCOMPrivate.h"
+#include "nsXPCOMStrings.h"
+#include "xptcall.h"
+
+#include <string.h>
+
+/**
+ * Private Method to register an exit routine.  This method
+ * used to allow you to setup a callback that will be called from
+ * the NS_ShutdownXPCOM function after all services and
+ * components have gone away. It was fatally flawed in that the component
+ * DLL could be released before the exit function was called; it is now a
+ * stub implementation that does nothing.
+ */
+XPCOM_API(nsresult)
+NS_RegisterXPCOMExitRoutine(XPCOMExitRoutine aExitRoutine, uint32_t aPriority);
+
+XPCOM_API(nsresult)
+NS_UnregisterXPCOMExitRoutine(XPCOMExitRoutine aExitRoutine);
+
+static const XPCOMFunctions kFrozenFunctions = {
+  XPCOM_GLUE_VERSION,
+  sizeof(XPCOMFunctions),
+  &NS_InitXPCOM2,
+  &NS_ShutdownXPCOM,
+  &NS_GetServiceManager,
+  &NS_GetComponentManager,
+  &NS_GetComponentRegistrar,
+  &NS_GetMemoryManager,
+  &NS_NewLocalFile,
+  &NS_NewNativeLocalFile,
+  &NS_RegisterXPCOMExitRoutine,
+  &NS_UnregisterXPCOMExitRoutine,
+
+  // these functions were added post 1.4
+  &NS_GetDebug,
+  nullptr,
+
+  // these functions were added post 1.6
+  &NS_StringContainerInit,
+  &NS_StringContainerFinish,
+  &NS_StringGetData,
+  &NS_StringSetData,
+  &NS_StringSetDataRange,
+  &NS_StringCopy,
+  &NS_CStringContainerInit,
+  &NS_CStringContainerFinish,
+  &NS_CStringGetData,
+  &NS_CStringSetData,
+  &NS_CStringSetDataRange,
+  &NS_CStringCopy,
+  &NS_CStringToUTF16,
+  &NS_UTF16ToCString,
+  &NS_StringCloneData,
+  &NS_CStringCloneData,
+
+  // these functions were added post 1.7 (post Firefox 1.0)
+  &moz_xmalloc,
+  &moz_xrealloc,
+  &free,
+  &NS_StringContainerInit2,
+  &NS_CStringContainerInit2,
+  &NS_StringGetMutableData,
+  &NS_CStringGetMutableData,
+  nullptr,
+
+  // these functions were added post 1.8
+  &NS_DebugBreak,
+  &NS_LogInit,
+  &NS_LogTerm,
+  &NS_LogAddRef,
+  &NS_LogRelease,
+  &NS_LogCtor,
+  &NS_LogDtor,
+  &NS_LogCOMPtrAddRef,
+  &NS_LogCOMPtrRelease,
+  &NS_GetXPTCallStub,
+  &NS_DestroyXPTCallStub,
+  &NS_InvokeByIndex,
+  nullptr,
+  nullptr,
+  &NS_StringSetIsVoid,
+  &NS_StringGetIsVoid,
+  &NS_CStringSetIsVoid,
+  &NS_CStringGetIsVoid,
+
+  // these functions were added post 1.9, but then made obsolete
+  nullptr,
+  nullptr,
+
+  &NS_CycleCollectorSuspect3,
+};
+
+EXPORT_XPCOM_API(nsresult)
+NS_GetFrozenFunctions(XPCOMFunctions* aFunctions, const char* /* aLibraryPath */)
+{
+  if (!aFunctions) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  if (aFunctions->version != XPCOM_GLUE_VERSION) {
+    return NS_ERROR_FAILURE;
+  }
+
+  uint32_t size = aFunctions->size;
+  if (size > sizeof(XPCOMFunctions)) {
+    size = sizeof(XPCOMFunctions);
+  }
+
+  size -= offsetof(XPCOMFunctions, init);
+
+  memcpy(&aFunctions->init, &kFrozenFunctions.init, size);
+
+  return NS_OK;
+}
+
+/*
+ * Stubs for nsXPCOMPrivate.h
+ */
+
+EXPORT_XPCOM_API(nsresult)
+NS_RegisterXPCOMExitRoutine(XPCOMExitRoutine aExitRoutine, uint32_t aPriority)
+{
+  return NS_OK;
+}
+
+EXPORT_XPCOM_API(nsresult)
+NS_UnregisterXPCOMExitRoutine(XPCOMExitRoutine aExitRoutine)
+{
+  return NS_OK;
+}