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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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/. */
/* Implementation of xptiInterfaceInfoManager. */
#include "mozilla/XPTInterfaceInfoManager.h"
#include "mozilla/FileUtils.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/StaticPtr.h"
#include "xptiprivate.h"
#include "nsDependentString.h"
#include "nsString.h"
#include "nsArrayEnumerator.h"
#include "nsDirectoryService.h"
#include "nsIMemoryReporter.h"
using namespace mozilla;
NS_IMPL_ISUPPORTS(
XPTInterfaceInfoManager,
nsIInterfaceInfoManager,
nsIMemoryReporter)
static StaticRefPtr<XPTInterfaceInfoManager> gInterfaceInfoManager;
size_t
XPTInterfaceInfoManager::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf)
{
size_t n = aMallocSizeOf(this);
ReentrantMonitorAutoEnter monitor(mWorkingSet.mTableReentrantMonitor);
// The entries themselves are allocated out of an arena accounted
// for elsewhere, so don't measure them
n += mWorkingSet.mIIDTable.ShallowSizeOfExcludingThis(aMallocSizeOf);
n += mWorkingSet.mNameTable.ShallowSizeOfExcludingThis(aMallocSizeOf);
return n;
}
MOZ_DEFINE_MALLOC_SIZE_OF(XPTIMallocSizeOf)
NS_IMETHODIMP
XPTInterfaceInfoManager::CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize)
{
size_t amount = SizeOfIncludingThis(XPTIMallocSizeOf);
// Measure gXPTIStructArena here, too. This is a bit grotty because it
// doesn't belong to the XPTIInterfaceInfoManager, but there's no
// obviously better place to measure it.
amount += XPT_SizeOfArenaIncludingThis(gXPTIStructArena, XPTIMallocSizeOf);
MOZ_COLLECT_REPORT(
"explicit/xpti-working-set", KIND_HEAP, UNITS_BYTES, amount,
"Memory used by the XPCOM typelib system.");
return NS_OK;
}
// static
XPTInterfaceInfoManager*
XPTInterfaceInfoManager::GetSingleton()
{
if (!gInterfaceInfoManager) {
gInterfaceInfoManager = new XPTInterfaceInfoManager();
gInterfaceInfoManager->InitMemoryReporter();
}
return gInterfaceInfoManager;
}
void
XPTInterfaceInfoManager::FreeInterfaceInfoManager()
{
gInterfaceInfoManager = nullptr;
}
XPTInterfaceInfoManager::XPTInterfaceInfoManager()
: mWorkingSet(),
mResolveLock("XPTInterfaceInfoManager.mResolveLock")
{
}
XPTInterfaceInfoManager::~XPTInterfaceInfoManager()
{
// We only do this on shutdown of the service.
mWorkingSet.InvalidateInterfaceInfos();
UnregisterWeakMemoryReporter(this);
}
void
XPTInterfaceInfoManager::InitMemoryReporter()
{
RegisterWeakMemoryReporter(this);
}
void
XPTInterfaceInfoManager::RegisterBuffer(char *buf, uint32_t length)
{
XPTState state;
XPT_InitXDRState(&state, buf, length);
XPTCursor curs;
NotNull<XPTCursor*> cursor = WrapNotNull(&curs);
if (!XPT_MakeCursor(&state, XPT_HEADER, 0, cursor)) {
return;
}
XPTHeader *header = nullptr;
if (XPT_DoHeader(gXPTIStructArena, cursor, &header)) {
RegisterXPTHeader(header);
}
}
void
XPTInterfaceInfoManager::RegisterXPTHeader(XPTHeader* aHeader)
{
if (aHeader->major_version >= XPT_MAJOR_INCOMPATIBLE_VERSION) {
NS_ASSERTION(!aHeader->num_interfaces,"bad libxpt");
LOG_AUTOREG((" file is version %d.%d Type file of version %d.0 or higher can not be read.\n", (int)header->major_version, (int)header->minor_version, (int)XPT_MAJOR_INCOMPATIBLE_VERSION));
}
xptiTypelibGuts* typelib = xptiTypelibGuts::Create(aHeader);
ReentrantMonitorAutoEnter monitor(mWorkingSet.mTableReentrantMonitor);
for(uint16_t k = 0; k < aHeader->num_interfaces; k++)
VerifyAndAddEntryIfNew(aHeader->interface_directory + k, k, typelib);
}
void
XPTInterfaceInfoManager::VerifyAndAddEntryIfNew(XPTInterfaceDirectoryEntry* iface,
uint16_t idx,
xptiTypelibGuts* typelib)
{
if (!iface->interface_descriptor)
return;
// The number of maximum methods is not arbitrary. It is the same value as
// in xpcom/reflect/xptcall/genstubs.pl; do not change this value
// without changing that one or you WILL see problems.
if (iface->interface_descriptor->num_methods > 250 &&
!(XPT_ID_IS_BUILTINCLASS(iface->interface_descriptor->flags))) {
NS_ASSERTION(0, "Too many methods to handle for the stub, cannot load");
fprintf(stderr, "ignoring too large interface: %s\n", iface->name);
return;
}
mWorkingSet.mTableReentrantMonitor.AssertCurrentThreadIn();
xptiInterfaceEntry* entry = mWorkingSet.mIIDTable.Get(iface->iid);
if (entry) {
// XXX validate this info to find possible inconsistencies
LOG_AUTOREG((" ignoring repeated interface: %s\n", iface->name));
return;
}
// Build a new xptiInterfaceEntry object and hook it up.
entry = xptiInterfaceEntry::Create(iface->name,
iface->iid,
iface->interface_descriptor,
typelib);
if (!entry)
return;
//XXX We should SetHeader too as part of the validation, no?
entry->SetScriptableFlag(XPT_ID_IS_SCRIPTABLE(iface->interface_descriptor->flags));
entry->SetBuiltinClassFlag(XPT_ID_IS_BUILTINCLASS(iface->interface_descriptor->flags));
entry->SetMainProcessScriptableOnlyFlag(
XPT_ID_IS_MAIN_PROCESS_SCRIPTABLE_ONLY(iface->interface_descriptor->flags));
mWorkingSet.mIIDTable.Put(entry->IID(), entry);
mWorkingSet.mNameTable.Put(entry->GetTheName(), entry);
typelib->SetEntryAt(idx, entry);
LOG_AUTOREG((" added interface: %s\n", iface->name));
}
// this is a private helper
static nsresult
EntryToInfo(xptiInterfaceEntry* entry, nsIInterfaceInfo **_retval)
{
if (!entry) {
*_retval = nullptr;
return NS_ERROR_FAILURE;
}
RefPtr<xptiInterfaceInfo> info = entry->InterfaceInfo();
info.forget(_retval);
return NS_OK;
}
xptiInterfaceEntry*
XPTInterfaceInfoManager::GetInterfaceEntryForIID(const nsIID *iid)
{
ReentrantMonitorAutoEnter monitor(mWorkingSet.mTableReentrantMonitor);
return mWorkingSet.mIIDTable.Get(*iid);
}
NS_IMETHODIMP
XPTInterfaceInfoManager::GetInfoForIID(const nsIID * iid, nsIInterfaceInfo **_retval)
{
NS_ASSERTION(iid, "bad param");
NS_ASSERTION(_retval, "bad param");
ReentrantMonitorAutoEnter monitor(mWorkingSet.mTableReentrantMonitor);
xptiInterfaceEntry* entry = mWorkingSet.mIIDTable.Get(*iid);
return EntryToInfo(entry, _retval);
}
NS_IMETHODIMP
XPTInterfaceInfoManager::GetInfoForName(const char *name, nsIInterfaceInfo **_retval)
{
NS_ASSERTION(name, "bad param");
NS_ASSERTION(_retval, "bad param");
ReentrantMonitorAutoEnter monitor(mWorkingSet.mTableReentrantMonitor);
xptiInterfaceEntry* entry = mWorkingSet.mNameTable.Get(name);
return EntryToInfo(entry, _retval);
}
void
XPTInterfaceInfoManager::GetScriptableInterfaces(nsCOMArray<nsIInterfaceInfo>& aInterfaces)
{
// I didn't want to incur the size overhead of using nsHashtable just to
// make building an enumerator easier. So, this code makes a snapshot of
// the table using an nsCOMArray and builds an enumerator for that.
// We can afford this transient cost.
ReentrantMonitorAutoEnter monitor(mWorkingSet.mTableReentrantMonitor);
aInterfaces.SetCapacity(mWorkingSet.mNameTable.Count());
for (auto iter = mWorkingSet.mNameTable.Iter(); !iter.Done(); iter.Next()) {
xptiInterfaceEntry* entry = iter.UserData();
if (entry->GetScriptableFlag()) {
nsCOMPtr<nsIInterfaceInfo> ii = entry->InterfaceInfo();
aInterfaces.AppendElement(ii);
}
}
}
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