https://github.com/mozilla/gecko-dev
Tip revision: dd116b95d37bdfb221c50c62edd2b2d406d53b29 authored by Wes Kocher on 29 May 2014, 00:00:32 UTC
Backed out changeset 94eef72cb9b7 (bug 993901) for causing OSX bc1 to frequently fail in browser_tabopen_reflows.js
Backed out changeset 94eef72cb9b7 (bug 993901) for causing OSX bc1 to frequently fail in browser_tabopen_reflows.js
Tip revision: dd116b9
XPCMaps.cpp
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set ts=8 sts=4 et sw=4 tw=99: */
/* 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/. */
/* Private maps (hashtables). */
#include "mozilla/MathAlgorithms.h"
#include "mozilla/MemoryReporting.h"
#include "xpcprivate.h"
#include "js/HashTable.h"
using namespace mozilla;
/***************************************************************************/
// static shared...
// Note this is returning the bit pattern of the first part of the nsID, not
// the pointer to the nsID.
static PLDHashNumber
HashIIDPtrKey(PLDHashTable *table, const void *key)
{
return *((js::HashNumber*)key);
}
static bool
MatchIIDPtrKey(PLDHashTable *table,
const PLDHashEntryHdr *entry,
const void *key)
{
return ((const nsID*)key)->
Equals(*((const nsID*)((PLDHashEntryStub*)entry)->key));
}
static PLDHashNumber
HashNativeKey(PLDHashTable *table, const void *key)
{
XPCNativeSetKey* Key = (XPCNativeSetKey*) key;
PLDHashNumber h = 0;
XPCNativeSet* Set;
XPCNativeInterface* Addition;
uint16_t Position;
if (Key->IsAKey()) {
Set = Key->GetBaseSet();
Addition = Key->GetAddition();
Position = Key->GetPosition();
} else {
Set = (XPCNativeSet*) Key;
Addition = nullptr;
Position = 0;
}
if (!Set) {
MOZ_ASSERT(Addition, "bad key");
// This would be an XOR like below.
// But "0 ^ x == x". So it does not matter.
h = (js::HashNumber) NS_PTR_TO_INT32(Addition) >> 2;
} else {
XPCNativeInterface** Current = Set->GetInterfaceArray();
uint16_t count = Set->GetInterfaceCount();
if (Addition) {
count++;
for (uint16_t i = 0; i < count; i++) {
if (i == Position)
h ^= (js::HashNumber) NS_PTR_TO_INT32(Addition) >> 2;
else
h ^= (js::HashNumber) NS_PTR_TO_INT32(*(Current++)) >> 2;
}
} else {
for (uint16_t i = 0; i < count; i++)
h ^= (js::HashNumber) NS_PTR_TO_INT32(*(Current++)) >> 2;
}
}
return h;
}
/***************************************************************************/
// implement JSObject2WrappedJSMap...
void
JSObject2WrappedJSMap::FindDyingJSObjects(nsTArray<nsXPCWrappedJS*>* dying)
{
for (Map::Range r = mTable.all(); !r.empty(); r.popFront()) {
nsXPCWrappedJS* wrapper = r.front().value();
MOZ_ASSERT(wrapper, "found a null JS wrapper!");
// walk the wrapper chain and find any whose JSObject is to be finalized
while (wrapper) {
if (wrapper->IsSubjectToFinalization() && wrapper->IsObjectAboutToBeFinalized())
dying->AppendElement(wrapper);
wrapper = wrapper->GetNextWrapper();
}
}
}
void
JSObject2WrappedJSMap::ShutdownMarker()
{
for (Map::Range r = mTable.all(); !r.empty(); r.popFront()) {
nsXPCWrappedJS* wrapper = r.front().value();
MOZ_ASSERT(wrapper, "found a null JS wrapper!");
MOZ_ASSERT(wrapper->IsValid(), "found an invalid JS wrapper!");
wrapper->SystemIsBeingShutDown();
}
}
/***************************************************************************/
// implement Native2WrappedNativeMap...
// static
Native2WrappedNativeMap*
Native2WrappedNativeMap::newMap(int size)
{
Native2WrappedNativeMap* map = new Native2WrappedNativeMap(size);
if (map && map->mTable)
return map;
// Allocation of the map or the creation of its hash table has
// failed. This will cause a nullptr deref later when we attempt
// to use the map, so we abort immediately to provide a more
// useful crash stack.
NS_RUNTIMEABORT("Ran out of memory.");
return nullptr;
}
Native2WrappedNativeMap::Native2WrappedNativeMap(int size)
{
mTable = PL_NewDHashTable(PL_DHashGetStubOps(), nullptr,
sizeof(Entry), size);
}
Native2WrappedNativeMap::~Native2WrappedNativeMap()
{
if (mTable)
PL_DHashTableDestroy(mTable);
}
size_t
Native2WrappedNativeMap::SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf)
{
size_t n = 0;
n += mallocSizeOf(this);
n += mTable ? PL_DHashTableSizeOfIncludingThis(mTable, SizeOfEntryExcludingThis, mallocSizeOf) : 0;
return n;
}
/* static */ size_t
Native2WrappedNativeMap::SizeOfEntryExcludingThis(PLDHashEntryHdr *hdr,
mozilla::MallocSizeOf mallocSizeOf, void *)
{
return mallocSizeOf(((Native2WrappedNativeMap::Entry*)hdr)->value);
}
/***************************************************************************/
// implement IID2WrappedJSClassMap...
const struct PLDHashTableOps IID2WrappedJSClassMap::Entry::sOps =
{
PL_DHashAllocTable,
PL_DHashFreeTable,
HashIIDPtrKey,
MatchIIDPtrKey,
PL_DHashMoveEntryStub,
PL_DHashClearEntryStub,
PL_DHashFinalizeStub
};
// static
IID2WrappedJSClassMap*
IID2WrappedJSClassMap::newMap(int size)
{
IID2WrappedJSClassMap* map = new IID2WrappedJSClassMap(size);
if (map && map->mTable)
return map;
delete map;
return nullptr;
}
IID2WrappedJSClassMap::IID2WrappedJSClassMap(int size)
{
mTable = PL_NewDHashTable(&Entry::sOps, nullptr, sizeof(Entry), size);
}
IID2WrappedJSClassMap::~IID2WrappedJSClassMap()
{
if (mTable)
PL_DHashTableDestroy(mTable);
}
/***************************************************************************/
// implement IID2NativeInterfaceMap...
const struct PLDHashTableOps IID2NativeInterfaceMap::Entry::sOps =
{
PL_DHashAllocTable,
PL_DHashFreeTable,
HashIIDPtrKey,
MatchIIDPtrKey,
PL_DHashMoveEntryStub,
PL_DHashClearEntryStub,
PL_DHashFinalizeStub
};
// static
IID2NativeInterfaceMap*
IID2NativeInterfaceMap::newMap(int size)
{
IID2NativeInterfaceMap* map = new IID2NativeInterfaceMap(size);
if (map && map->mTable)
return map;
delete map;
return nullptr;
}
IID2NativeInterfaceMap::IID2NativeInterfaceMap(int size)
{
mTable = PL_NewDHashTable(&Entry::sOps, nullptr, sizeof(Entry), size);
}
IID2NativeInterfaceMap::~IID2NativeInterfaceMap()
{
if (mTable)
PL_DHashTableDestroy(mTable);
}
size_t
IID2NativeInterfaceMap::SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf)
{
size_t n = 0;
n += mallocSizeOf(this);
n += mTable ? PL_DHashTableSizeOfIncludingThis(mTable, SizeOfEntryExcludingThis, mallocSizeOf) : 0;
return n;
}
/* static */ size_t
IID2NativeInterfaceMap::SizeOfEntryExcludingThis(PLDHashEntryHdr *hdr,
mozilla::MallocSizeOf mallocSizeOf, void *)
{
XPCNativeInterface *iface = ((IID2NativeInterfaceMap::Entry*)hdr)->value;
return iface->SizeOfIncludingThis(mallocSizeOf);
}
/***************************************************************************/
// implement ClassInfo2NativeSetMap...
// static
ClassInfo2NativeSetMap*
ClassInfo2NativeSetMap::newMap(int size)
{
ClassInfo2NativeSetMap* map = new ClassInfo2NativeSetMap(size);
if (map && map->mTable)
return map;
delete map;
return nullptr;
}
ClassInfo2NativeSetMap::ClassInfo2NativeSetMap(int size)
{
mTable = PL_NewDHashTable(PL_DHashGetStubOps(), nullptr,
sizeof(Entry), size);
}
ClassInfo2NativeSetMap::~ClassInfo2NativeSetMap()
{
if (mTable)
PL_DHashTableDestroy(mTable);
}
size_t
ClassInfo2NativeSetMap::ShallowSizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf)
{
size_t n = 0;
n += mallocSizeOf(this);
// The second arg is nullptr because this is a "shallow" measurement of the map.
n += mTable ? PL_DHashTableSizeOfIncludingThis(mTable, nullptr, mallocSizeOf) : 0;
return n;
}
/***************************************************************************/
// implement ClassInfo2WrappedNativeProtoMap...
// static
ClassInfo2WrappedNativeProtoMap*
ClassInfo2WrappedNativeProtoMap::newMap(int size)
{
ClassInfo2WrappedNativeProtoMap* map = new ClassInfo2WrappedNativeProtoMap(size);
if (map && map->mTable)
return map;
// Allocation of the map or the creation of its hash table has
// failed. This will cause a nullptr deref later when we attempt
// to use the map, so we abort immediately to provide a more
// useful crash stack.
NS_RUNTIMEABORT("Ran out of memory.");
return nullptr;
}
ClassInfo2WrappedNativeProtoMap::ClassInfo2WrappedNativeProtoMap(int size)
{
mTable = PL_NewDHashTable(PL_DHashGetStubOps(), nullptr,
sizeof(Entry), size);
}
ClassInfo2WrappedNativeProtoMap::~ClassInfo2WrappedNativeProtoMap()
{
if (mTable)
PL_DHashTableDestroy(mTable);
}
size_t
ClassInfo2WrappedNativeProtoMap::SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf)
{
size_t n = 0;
n += mallocSizeOf(this);
n += mTable ? PL_DHashTableSizeOfIncludingThis(mTable, SizeOfEntryExcludingThis, mallocSizeOf) : 0;
return n;
}
/* static */ size_t
ClassInfo2WrappedNativeProtoMap::SizeOfEntryExcludingThis(PLDHashEntryHdr *hdr,
mozilla::MallocSizeOf mallocSizeOf, void *)
{
return mallocSizeOf(((ClassInfo2WrappedNativeProtoMap::Entry*)hdr)->value);
}
/***************************************************************************/
// implement NativeSetMap...
bool
NativeSetMap::Entry::Match(PLDHashTable *table,
const PLDHashEntryHdr *entry,
const void *key)
{
XPCNativeSetKey* Key = (XPCNativeSetKey*) key;
// See the comment in the XPCNativeSetKey declaration in xpcprivate.h.
if (!Key->IsAKey()) {
XPCNativeSet* Set1 = (XPCNativeSet*) key;
XPCNativeSet* Set2 = ((Entry*)entry)->key_value;
if (Set1 == Set2)
return true;
uint16_t count = Set1->GetInterfaceCount();
if (count != Set2->GetInterfaceCount())
return false;
XPCNativeInterface** Current1 = Set1->GetInterfaceArray();
XPCNativeInterface** Current2 = Set2->GetInterfaceArray();
for (uint16_t i = 0; i < count; i++) {
if (*(Current1++) != *(Current2++))
return false;
}
return true;
}
XPCNativeSet* SetInTable = ((Entry*)entry)->key_value;
XPCNativeSet* Set = Key->GetBaseSet();
XPCNativeInterface* Addition = Key->GetAddition();
if (!Set) {
// This is a special case to deal with the invariant that says:
// "All sets have exactly one nsISupports interface and it comes first."
// See XPCNativeSet::NewInstance for details.
//
// Though we might have a key that represents only one interface, we
// know that if that one interface were contructed into a set then
// it would end up really being a set with two interfaces (except for
// the case where the one interface happened to be nsISupports).
return ((SetInTable->GetInterfaceCount() == 1 &&
SetInTable->GetInterfaceAt(0) == Addition) ||
(SetInTable->GetInterfaceCount() == 2 &&
SetInTable->GetInterfaceAt(1) == Addition));
}
if (!Addition && Set == SetInTable)
return true;
uint16_t count = Set->GetInterfaceCount() + (Addition ? 1 : 0);
if (count != SetInTable->GetInterfaceCount())
return false;
uint16_t Position = Key->GetPosition();
XPCNativeInterface** CurrentInTable = SetInTable->GetInterfaceArray();
XPCNativeInterface** Current = Set->GetInterfaceArray();
for (uint16_t i = 0; i < count; i++) {
if (Addition && i == Position) {
if (Addition != *(CurrentInTable++))
return false;
} else {
if (*(Current++) != *(CurrentInTable++))
return false;
}
}
return true;
}
const struct PLDHashTableOps NativeSetMap::Entry::sOps =
{
PL_DHashAllocTable,
PL_DHashFreeTable,
HashNativeKey,
Match,
PL_DHashMoveEntryStub,
PL_DHashClearEntryStub,
PL_DHashFinalizeStub
};
// static
NativeSetMap*
NativeSetMap::newMap(int size)
{
NativeSetMap* map = new NativeSetMap(size);
if (map && map->mTable)
return map;
delete map;
return nullptr;
}
NativeSetMap::NativeSetMap(int size)
{
mTable = PL_NewDHashTable(&Entry::sOps, nullptr, sizeof(Entry), size);
}
NativeSetMap::~NativeSetMap()
{
if (mTable)
PL_DHashTableDestroy(mTable);
}
size_t
NativeSetMap::SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf)
{
size_t n = 0;
n += mallocSizeOf(this);
n += mTable ? PL_DHashTableSizeOfIncludingThis(mTable, SizeOfEntryExcludingThis, mallocSizeOf) : 0;
return n;
}
/* static */ size_t
NativeSetMap::SizeOfEntryExcludingThis(PLDHashEntryHdr *hdr, mozilla::MallocSizeOf mallocSizeOf, void *)
{
XPCNativeSet *set = ((NativeSetMap::Entry*)hdr)->key_value;
return set->SizeOfIncludingThis(mallocSizeOf);
}
/***************************************************************************/
// implement IID2ThisTranslatorMap...
bool
IID2ThisTranslatorMap::Entry::Match(PLDHashTable *table,
const PLDHashEntryHdr *entry,
const void *key)
{
return ((const nsID*)key)->Equals(((Entry*)entry)->key);
}
void
IID2ThisTranslatorMap::Entry::Clear(PLDHashTable *table, PLDHashEntryHdr *entry)
{
static_cast<Entry*>(entry)->value = nullptr;
memset(entry, 0, table->entrySize);
}
const struct PLDHashTableOps IID2ThisTranslatorMap::Entry::sOps =
{
PL_DHashAllocTable,
PL_DHashFreeTable,
HashIIDPtrKey,
Match,
PL_DHashMoveEntryStub,
Clear,
PL_DHashFinalizeStub
};
// static
IID2ThisTranslatorMap*
IID2ThisTranslatorMap::newMap(int size)
{
IID2ThisTranslatorMap* map = new IID2ThisTranslatorMap(size);
if (map && map->mTable)
return map;
delete map;
return nullptr;
}
IID2ThisTranslatorMap::IID2ThisTranslatorMap(int size)
{
mTable = PL_NewDHashTable(&Entry::sOps, nullptr, sizeof(Entry), size);
}
IID2ThisTranslatorMap::~IID2ThisTranslatorMap()
{
if (mTable)
PL_DHashTableDestroy(mTable);
}
/***************************************************************************/
PLDHashNumber
XPCNativeScriptableSharedMap::Entry::Hash(PLDHashTable *table, const void *key)
{
PLDHashNumber h;
const unsigned char *s;
XPCNativeScriptableShared* obj =
(XPCNativeScriptableShared*) key;
// hash together the flags and the classname string, ignore the interfaces
// bitmap since it's very rare that it's different when flags and classname
// are the same.
h = (PLDHashNumber) obj->GetFlags();
for (s = (const unsigned char*) obj->GetJSClass()->name; *s != '\0'; s++)
h = RotateLeft(h, 4) ^ *s;
return h;
}
bool
XPCNativeScriptableSharedMap::Entry::Match(PLDHashTable *table,
const PLDHashEntryHdr *entry,
const void *key)
{
XPCNativeScriptableShared* obj1 =
((XPCNativeScriptableSharedMap::Entry*) entry)->key;
XPCNativeScriptableShared* obj2 =
(XPCNativeScriptableShared*) key;
// match the flags, the classname string and the interfaces bitmap
if (obj1->GetFlags() != obj2->GetFlags() ||
obj1->GetInterfacesBitmap() != obj2->GetInterfacesBitmap())
return false;
const char* name1 = obj1->GetJSClass()->name;
const char* name2 = obj2->GetJSClass()->name;
if (!name1 || !name2)
return name1 == name2;
return 0 == strcmp(name1, name2);
}
const struct PLDHashTableOps XPCNativeScriptableSharedMap::Entry::sOps =
{
PL_DHashAllocTable,
PL_DHashFreeTable,
Hash,
Match,
PL_DHashMoveEntryStub,
PL_DHashClearEntryStub,
PL_DHashFinalizeStub
};
// static
XPCNativeScriptableSharedMap*
XPCNativeScriptableSharedMap::newMap(int size)
{
XPCNativeScriptableSharedMap* map =
new XPCNativeScriptableSharedMap(size);
if (map && map->mTable)
return map;
delete map;
return nullptr;
}
XPCNativeScriptableSharedMap::XPCNativeScriptableSharedMap(int size)
{
mTable = PL_NewDHashTable(&Entry::sOps, nullptr, sizeof(Entry), size);
}
XPCNativeScriptableSharedMap::~XPCNativeScriptableSharedMap()
{
if (mTable)
PL_DHashTableDestroy(mTable);
}
bool
XPCNativeScriptableSharedMap::GetNewOrUsed(uint32_t flags,
char* name,
uint32_t interfacesBitmap,
XPCNativeScriptableInfo* si)
{
NS_PRECONDITION(name,"bad param");
NS_PRECONDITION(si,"bad param");
XPCNativeScriptableShared key(flags, name, interfacesBitmap);
Entry* entry = (Entry*)
PL_DHashTableOperate(mTable, &key, PL_DHASH_ADD);
if (!entry)
return false;
XPCNativeScriptableShared* shared = entry->key;
if (!shared) {
entry->key = shared =
new XPCNativeScriptableShared(flags, key.TransferNameOwnership(),
interfacesBitmap);
if (!shared)
return false;
shared->PopulateJSClass();
}
si->SetScriptableShared(shared);
return true;
}
/***************************************************************************/
// implement XPCWrappedNativeProtoMap...
// static
XPCWrappedNativeProtoMap*
XPCWrappedNativeProtoMap::newMap(int size)
{
XPCWrappedNativeProtoMap* map = new XPCWrappedNativeProtoMap(size);
if (map && map->mTable)
return map;
delete map;
return nullptr;
}
XPCWrappedNativeProtoMap::XPCWrappedNativeProtoMap(int size)
{
mTable = PL_NewDHashTable(PL_DHashGetStubOps(), nullptr,
sizeof(PLDHashEntryStub), size);
}
XPCWrappedNativeProtoMap::~XPCWrappedNativeProtoMap()
{
if (mTable)
PL_DHashTableDestroy(mTable);
}
/***************************************************************************/