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Commit 051f314a authored by mikhail.naganov@gmail.com's avatar mikhail.naganov@gmail.com
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New heap profiler: include all heap objects and refs into snapshot. 

Otherwise, retaned memory sizes are not precise. This increases size
of heap snapshot, I will deal with this later. Heap objects and
references previously missing in snapshot are now marked as 'hidden'.
That means, they not shown to user, but participate in sizes
calculation.

Other small changes:
 - added 'shortcut' graph edges: e.g. to pin global objects on top
   level;
 - meta-information in JSON snapshot is no more double encoded.

Review URL: http://codereview.chromium.org/5139002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5849 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
parent 7d72d303
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Showing with 410 additions and 277 deletions
include/v8-profiler.h
View file @ 051f314a
......@@ -197,8 +197,13 @@ class V8EXPORT HeapGraphEdge {
kContextVariable = 0, // A variable from a function context.
kElement = 1, // An element of an array.
kProperty = 2, // A named object property.
kInternal = 3 // A link that can't be accessed from JS,
// thus, its name isn't a real property name.
kInternal = 3, // A link that can't be accessed from JS,
// thus, its name isn't a real property name
// (e.g. parts of a ConsString).
kHidden = 4, // A link that is needed for proper sizes
// calculation, but may be hidden from user.
kShortcut = 5 // A link that must not be followed during
// sizes calculation.
};
/** Returns edge type (see HeapGraphEdge::Type). */
......@@ -240,7 +245,7 @@ class V8EXPORT HeapGraphPath {
class V8EXPORT HeapGraphNode {
public:
enum Type {
kInternal = 0, // Internal node, a virtual one, for housekeeping.
kHidden = 0, // Hidden node, may be filtered when shown to user.
kArray = 1, // An array of elements.
kString = 2, // A string.
kObject = 3, // A JS object (except for arrays and strings).
......
src/api.cc
View file @ 051f314a
......@@ -4669,9 +4669,11 @@ Handle<Value> HeapGraphEdge::GetName() const {
case i::HeapGraphEdge::kContextVariable:
case i::HeapGraphEdge::kInternal:
case i::HeapGraphEdge::kProperty:
case i::HeapGraphEdge::kShortcut:
return Handle<String>(ToApi<String>(i::Factory::LookupAsciiSymbol(
edge->name())));
case i::HeapGraphEdge::kElement:
case i::HeapGraphEdge::kHidden:
return Handle<Number>(ToApi<Number>(i::Factory::NewNumberFromInt(
edge->index())));
default: UNREACHABLE();
......
src/heap-profiler.cc
View file @ 051f314a
......@@ -927,10 +927,16 @@ class AllocatingRetainersIterator {
void Call(const JSObjectsCluster& cluster,
const NumberAndSizeInfo& number_and_size) {
int child_index, retainer_index;
map_->CountReference(ClusterAsHeapObject(cluster), child_,
&child_index, &retainer_index);
map_->Map(ClusterAsHeapObject(cluster))->SetElementReference(
child_index, number_and_size.number(), child_entry_, retainer_index);
map_->CountReference(ClusterAsHeapObject(cluster),
child_,
&child_index,
&retainer_index);
map_->Map(ClusterAsHeapObject(cluster))->SetIndexedReference(
HeapGraphEdge::kElement,
child_index,
number_and_size.number(),
child_entry_,
retainer_index);
}
private:
......@@ -1042,7 +1048,7 @@ void AggregatedHeapSnapshotGenerator::FillHeapSnapshot(HeapSnapshot* snapshot) {
if (agg_snapshot_->info()[i].bytes() > 0) {
AddEntryFromAggregatedSnapshot(snapshot,
&root_child_index,
HeapEntry::kInternal,
HeapEntry::kHidden,
agg_snapshot_->info()[i].name(),
agg_snapshot_->info()[i].number(),
agg_snapshot_->info()[i].bytes(),
......
src/profile-generator-inl.h
View file @ 051f314a
......@@ -110,15 +110,13 @@ void HeapEntriesMap::UpdateEntries(Visitor* visitor) {
for (HashMap::Entry* p = entries_.Start();
p != NULL;
p = entries_.Next(p)) {
if (!IsAlias(p->value)) {
EntryInfo* entry_info = reinterpret_cast<EntryInfo*>(p->value);
entry_info->entry = visitor->GetEntry(
reinterpret_cast<HeapObject*>(p->key),
entry_info->children_count,
entry_info->retainers_count);
entry_info->children_count = 0;
entry_info->retainers_count = 0;
}
EntryInfo* entry_info = reinterpret_cast<EntryInfo*>(p->value);
entry_info->entry = visitor->GetEntry(
reinterpret_cast<HeapObject*>(p->key),
entry_info->children_count,
entry_info->retainers_count);
entry_info->children_count = 0;
entry_info->retainers_count = 0;
}
}
......
src/profile-generator.cc
View file @ 051f314a
......@@ -829,7 +829,10 @@ void ProfileGenerator::RecordTickSample(const TickSample& sample) {
void HeapGraphEdge::Init(
int child_index, Type type, const char* name, HeapEntry* to) {
ASSERT(type == kContextVariable || type == kProperty || type == kInternal);
ASSERT(type == kContextVariable
|| type == kProperty
|| type == kInternal
|| type == kShortcut);
child_index_ = child_index;
type_ = type;
name_ = name;
......@@ -837,14 +840,20 @@ void HeapGraphEdge::Init(
}
void HeapGraphEdge::Init(int child_index, int index, HeapEntry* to) {
void HeapGraphEdge::Init(int child_index, Type type, int index, HeapEntry* to) {
ASSERT(type == kElement || type == kHidden);
child_index_ = child_index;
type_ = kElement;
type_ = type;
index_ = index;
to_ = to;
}
void HeapGraphEdge::Init(int child_index, int index, HeapEntry* to) {
Init(child_index, kElement, index, to);
}
HeapEntry* HeapGraphEdge::From() {
return reinterpret_cast<HeapEntry*>(this - child_index_) - 1;
}
......@@ -879,9 +888,12 @@ void HeapEntry::SetNamedReference(HeapGraphEdge::Type type,
}
void HeapEntry::SetElementReference(
int child_index, int index, HeapEntry* entry, int retainer_index) {
children_arr()[child_index].Init(child_index, index, entry);
void HeapEntry::SetIndexedReference(HeapGraphEdge::Type type,
int child_index,
int index,
HeapEntry* entry,
int retainer_index) {
children_arr()[child_index].Init(child_index, type, index, entry);
entry->retainers_arr()[retainer_index] = children_arr() + child_index;
}
......@@ -929,6 +941,7 @@ void HeapEntry::ApplyAndPaintAllReachable(Visitor* visitor) {
HeapEntry* entry = list.RemoveLast();
Vector<HeapGraphEdge> children = entry->children();
for (int i = 0; i < children.length(); ++i) {
if (children[i].type() == HeapGraphEdge::kShortcut) continue;
HeapEntry* child = children[i].to();
if (!child->painted_reachable()) {
list.Add(child);
......@@ -985,6 +998,12 @@ void HeapEntry::Print(int max_depth, int indent) {
case HeapGraphEdge::kProperty:
OS::Print(" %*c %s: ", indent, ' ', edge.name());
break;
case HeapGraphEdge::kHidden:
OS::Print(" %*c $%d: ", indent, ' ', edge.index());
break;
case HeapGraphEdge::kShortcut:
OS::Print(" %*c ^%s: ", indent, ' ', edge.name());
break;
default:
OS::Print("!!! unknown edge type: %d ", edge.type());
}
......@@ -995,7 +1014,7 @@ void HeapEntry::Print(int max_depth, int indent) {
const char* HeapEntry::TypeAsString() {
switch (type()) {
case kInternal: return "/internal/";
case kHidden: return "/hidden/";
case kObject: return "/object/";
case kClosure: return "/closure/";
case kString: return "/string/";
......@@ -1094,6 +1113,7 @@ void HeapEntryCalculatedData::CalculateSizes(HeapEntry* entry) {
HeapEntry* curr = list.RemoveLast();
Vector<HeapGraphEdge> children = curr->children();
for (int i = 0; i < children.length(); ++i) {
if (children[i].type() == HeapGraphEdge::kShortcut) continue;
HeapEntry* child = children[i].to();
if (child != entry && child->not_painted_reachable_from_others()) {
list.Add(child);
......@@ -1192,6 +1212,7 @@ void HeapGraphPath::Print() {
OS::Print("[#%s] ", edge->name());
break;
case HeapGraphEdge::kElement:
case HeapGraphEdge::kHidden:
OS::Print("[%d] ", edge->index());
break;
case HeapGraphEdge::kInternal:
......@@ -1200,6 +1221,9 @@ void HeapGraphPath::Print() {
case HeapGraphEdge::kProperty:
OS::Print("[%s] ", edge->name());
break;
case HeapGraphEdge::kShortcut:
OS::Print("[^%s] ", edge->name());
break;
default:
OS::Print("!!! unknown edge type: %d ", edge->type());
}
......@@ -1211,6 +1235,8 @@ void HeapGraphPath::Print() {
HeapObject *const HeapSnapshot::kInternalRootObject =
reinterpret_cast<HeapObject*>(1);
HeapObject *const HeapSnapshot::kGcRootsObject =
reinterpret_cast<HeapObject*>(2);
// It is very important to keep objects that form a heap snapshot
......@@ -1240,6 +1266,7 @@ HeapSnapshot::HeapSnapshot(HeapSnapshotsCollection* collection,
title_(title),
uid_(uid),
root_entry_(NULL),
gc_roots_entry_(NULL),
raw_entries_(NULL),
entries_sorted_(false) {
STATIC_ASSERT(
......@@ -1280,9 +1307,20 @@ HeapEntry* HeapSnapshot::AddEntry(HeapObject* object,
if (object == kInternalRootObject) {
ASSERT(root_entry_ == NULL);
ASSERT(retainers_count == 0);
root_entry_ = AddEntry(
HeapEntry::kInternal, "", 0, 0, children_count, retainers_count);
return root_entry_;
return (root_entry_ = AddEntry(HeapEntry::kObject,
"",
HeapObjectsMap::kInternalRootObjectId,
0,
children_count,
retainers_count));
} else if (object == kGcRootsObject) {
ASSERT(gc_roots_entry_ == NULL);
return (gc_roots_entry_ = AddEntry(HeapEntry::kObject,
"(GC roots)",
HeapObjectsMap::kGcRootsObjectId,
0,
children_count,
retainers_count));
} else if (object->IsJSFunction()) {
JSFunction* func = JSFunction::cast(object);
SharedFunctionInfo* shared = func->shared();
......@@ -1345,22 +1383,11 @@ HeapEntry* HeapSnapshot::AddEntry(HeapObject* object,
children_count,
retainers_count);
}
// No interest in this object.
return NULL;
}
bool HeapSnapshot::WillAddEntry(HeapObject* object) {
return object == kInternalRootObject
|| object->IsJSFunction()
|| object->IsJSRegExp()
|| object->IsJSObject()
|| object->IsString()
|| object->IsCode()
|| object->IsSharedFunctionInfo()
|| object->IsScript()
|| object->IsFixedArray()
|| object->IsHeapNumber();
return AddEntry(object,
HeapEntry::kHidden,
"system",
children_count,
retainers_count);
}
......@@ -1387,7 +1414,7 @@ HeapEntry* HeapSnapshot::AddEntry(HeapObject* object,
return AddEntry(type,
name,
collection_->GetObjectId(object->address()),
GetObjectSize(object),
object->Size(),
children_count,
retainers_count);
}
......@@ -1419,36 +1446,6 @@ HeapEntry* HeapSnapshot::GetNextEntryToInit() {
}
int HeapSnapshot::GetObjectSize(HeapObject* obj) {
return obj->IsJSObject() ?
CalculateNetworkSize(JSObject::cast(obj)) : obj->Size();
}
int HeapSnapshot::CalculateNetworkSize(JSObject* obj) {
int size = obj->Size();
// If 'properties' and 'elements' are non-empty (thus, non-shared),
// take their size into account.
if (obj->properties() != Heap::empty_fixed_array()) {
size += obj->properties()->Size();
}
if (obj->elements() != Heap::empty_fixed_array()) {
size += obj->elements()->Size();
}
// For functions, also account non-empty context and literals sizes.
if (obj->IsJSFunction()) {
JSFunction* f = JSFunction::cast(obj);
if (f->unchecked_context()->IsContext()) {
size += f->context()->Size();
}
if (f->literals()->length() != 0) {
size += f->literals()->Size();
}
}
return size;
}
HeapSnapshotsDiff* HeapSnapshot::CompareWith(HeapSnapshot* snapshot) {
return collection_->CompareSnapshots(this, snapshot);
}
......@@ -1475,9 +1472,14 @@ void HeapSnapshot::Print(int max_depth) {
}
const uint64_t HeapObjectsMap::kInternalRootObjectId = 0;
const uint64_t HeapObjectsMap::kGcRootsObjectId = 1;
// Increase kFirstAvailableObjectId if new 'special' objects appear.
const uint64_t HeapObjectsMap::kFirstAvailableObjectId = 2;
HeapObjectsMap::HeapObjectsMap()
: initial_fill_mode_(true),
next_id_(1),
next_id_(kFirstAvailableObjectId),
entries_map_(AddressesMatch),
entries_(new List<EntryInfo>()) { }
......@@ -1628,17 +1630,7 @@ HeapEntriesMap::HeapEntriesMap()
HeapEntriesMap::~HeapEntriesMap() {
for (HashMap::Entry* p = entries_.Start(); p != NULL; p = entries_.Next(p)) {
if (!IsAlias(p->value)) delete reinterpret_cast<EntryInfo*>(p->value);
}
}
void HeapEntriesMap::Alias(HeapObject* from, HeapObject* to) {
HashMap::Entry* from_cache_entry = entries_.Lookup(from, Hash(from), true);
HashMap::Entry* to_cache_entry = entries_.Lookup(to, Hash(to), false);
if (from_cache_entry->value == NULL) {
ASSERT(to_cache_entry != NULL);
from_cache_entry->value = MakeAlias(to_cache_entry->value);
delete reinterpret_cast<EntryInfo*>(p->value);
}
}
......@@ -1646,8 +1638,7 @@ void HeapEntriesMap::Alias(HeapObject* from, HeapObject* to) {
HeapEntry* HeapEntriesMap::Map(HeapObject* object) {
HashMap::Entry* cache_entry = entries_.Lookup(object, Hash(object), false);
if (cache_entry != NULL) {
EntryInfo* entry_info =
reinterpret_cast<EntryInfo*>(Unalias(cache_entry->value));
EntryInfo* entry_info = reinterpret_cast<EntryInfo*>(cache_entry->value);
return entry_info->entry;
} else {
return NULL;
......@@ -1671,9 +1662,9 @@ void HeapEntriesMap::CountReference(HeapObject* from, HeapObject* to,
ASSERT(from_cache_entry != NULL);
ASSERT(to_cache_entry != NULL);
EntryInfo* from_entry_info =
reinterpret_cast<EntryInfo*>(Unalias(from_cache_entry->value));
reinterpret_cast<EntryInfo*>(from_cache_entry->value);
EntryInfo* to_entry_info =
reinterpret_cast<EntryInfo*>(Unalias(to_cache_entry->value));
reinterpret_cast<EntryInfo*>(to_cache_entry->value);
if (prev_children_count)
*prev_children_count = from_entry_info->children_count;
if (prev_retainers_count)
......@@ -1685,6 +1676,36 @@ void HeapEntriesMap::CountReference(HeapObject* from, HeapObject* to,
}
HeapObjectsSet::HeapObjectsSet()
: entries_(HeapEntriesMap::HeapObjectsMatch) {
}
void HeapObjectsSet::Clear() {
entries_.Clear();
}
bool HeapObjectsSet::Contains(Object* obj) {
if (!obj->IsHeapObject()) return false;
HeapObject* object = HeapObject::cast(obj);
HashMap::Entry* cache_entry =
entries_.Lookup(object, HeapEntriesMap::Hash(object), false);
return cache_entry != NULL;
}
void HeapObjectsSet::Insert(Object* obj) {
if (!obj->IsHeapObject()) return;
HeapObject* object = HeapObject::cast(obj);
HashMap::Entry* cache_entry =
entries_.Lookup(object, HeapEntriesMap::Hash(object), true);
if (cache_entry->value == NULL) {
cache_entry->value = HeapEntriesMap::kHeapEntryPlaceholder;
}
}
HeapSnapshotGenerator::HeapSnapshotGenerator(HeapSnapshot* snapshot)
: snapshot_(snapshot),
collection_(snapshot->collection()),
......@@ -1699,7 +1720,8 @@ class SnapshotCounter : public HeapSnapshotGenerator::SnapshotFillerInterface {
entries_->Pair(obj, HeapEntriesMap::kHeapEntryPlaceholder);
return HeapEntriesMap::kHeapEntryPlaceholder;
}
void SetElementReference(HeapObject* parent_obj,
void SetIndexedReference(HeapGraphEdge::Type,
HeapObject* parent_obj,
HeapEntry*,
int,
Object* child_obj,
......@@ -1714,10 +1736,18 @@ class SnapshotCounter : public HeapSnapshotGenerator::SnapshotFillerInterface {
HeapEntry*) {
entries_->CountReference(parent_obj, HeapObject::cast(child_obj));
}
void SetRootReference(Object* child_obj, HeapEntry*) {
void SetRootShortcutReference(Object* child_obj, HeapEntry*) {
entries_->CountReference(
HeapSnapshot::kInternalRootObject, HeapObject::cast(child_obj));
}
void SetRootGcRootsReference() {
entries_->CountReference(
HeapSnapshot::kInternalRootObject, HeapSnapshot::kGcRootsObject);
}
void SetStrongRootReference(Object* child_obj, HeapEntry*) {
entries_->CountReference(
HeapSnapshot::kGcRootsObject, HeapObject::cast(child_obj));
}
private:
HeapEntriesMap* entries_;
};
......@@ -1733,16 +1763,19 @@ class SnapshotFiller : public HeapSnapshotGenerator::SnapshotFillerInterface {
UNREACHABLE();
return NULL;
}
void SetElementReference(HeapObject* parent_obj,
void SetIndexedReference(HeapGraphEdge::Type type,
HeapObject* parent_obj,
HeapEntry* parent_entry,
int index,
Object* child_obj,
HeapEntry* child_entry) {
int child_index, retainer_index;
entries_->CountReference(parent_obj, HeapObject::cast(child_obj),
&child_index, &retainer_index);
parent_entry->SetElementReference(
child_index, index, child_entry, retainer_index);
entries_->CountReference(parent_obj,
HeapObject::cast(child_obj),
&child_index,
&retainer_index);
parent_entry->SetIndexedReference(
type, child_index, index, child_entry, retainer_index);
}
void SetNamedReference(HeapGraphEdge::Type type,
HeapObject* parent_obj,
......@@ -1759,13 +1792,43 @@ class SnapshotFiller : public HeapSnapshotGenerator::SnapshotFillerInterface {
child_entry,
retainer_index);
}
void SetRootReference(Object* child_obj, HeapEntry* child_entry) {
void SetRootGcRootsReference() {
int child_index, retainer_index;
entries_->CountReference(
HeapSnapshot::kInternalRootObject, HeapObject::cast(child_obj),
&child_index, &retainer_index);
snapshot_->root()->SetElementReference(
child_index, child_index + 1, child_entry, retainer_index);
entries_->CountReference(HeapSnapshot::kInternalRootObject,
HeapSnapshot::kGcRootsObject,
&child_index,
&retainer_index);
snapshot_->root()->SetIndexedReference(HeapGraphEdge::kElement,
child_index,
child_index + 1,
snapshot_->gc_roots(),
retainer_index);
}
void SetRootShortcutReference(Object* child_obj,
HeapEntry* child_entry) {
int child_index, retainer_index;
entries_->CountReference(HeapSnapshot::kInternalRootObject,
HeapObject::cast(child_obj),
&child_index,
&retainer_index);
snapshot_->root()->SetNamedReference(HeapGraphEdge::kShortcut,
child_index,
collection_->GetName(child_index + 1),
child_entry,
retainer_index);
}
void SetStrongRootReference(Object* child_obj,
HeapEntry* child_entry) {
int child_index, retainer_index;
entries_->CountReference(HeapSnapshot::kGcRootsObject,
HeapObject::cast(child_obj),
&child_index,
&retainer_index);
snapshot_->gc_roots()->SetIndexedReference(HeapGraphEdge::kElement,
child_index,
child_index + 1,
child_entry,
retainer_index);
}
private:
HeapSnapshot* snapshot_;
......@@ -1788,6 +1851,19 @@ class SnapshotAllocator {
HeapSnapshot* snapshot_;
};
class RootsReferencesExtractor : public ObjectVisitor {
public:
explicit RootsReferencesExtractor(HeapSnapshotGenerator* generator)
: generator_(generator) {
}
void VisitPointers(Object** start, Object** end) {
for (Object** p = start; p < end; p++) generator_->SetGcRootsReference(*p);
}
private:
HeapSnapshotGenerator* generator_;
};
void HeapSnapshotGenerator::GenerateSnapshot() {
AssertNoAllocation no_alloc;
......@@ -1795,12 +1871,14 @@ void HeapSnapshotGenerator::GenerateSnapshot() {
SnapshotCounter counter(&entries_);
filler_ = &counter;
filler_->AddEntry(HeapSnapshot::kInternalRootObject);
HeapIterator iterator1;
for (HeapObject* obj = iterator1.next();
obj != NULL;
obj = iterator1.next()) {
filler_->AddEntry(HeapSnapshot::kGcRootsObject);
HeapIterator iterator(HeapIterator::kPreciseFiltering);
for (HeapObject* obj = iterator.next(); obj != NULL; obj = iterator.next()) {
ExtractReferences(obj);
}
SetRootGcRootsReference();
RootsReferencesExtractor extractor(this);
Heap::IterateRoots(&extractor, VISIT_ONLY_STRONG);
// Allocate and fill entries in the snapshot, allocate references.
snapshot_->AllocateEntries(entries_.entries_count(),
......@@ -1812,12 +1890,12 @@ void HeapSnapshotGenerator::GenerateSnapshot() {
// Pass 2. Fill references.
SnapshotFiller filler(snapshot_, &entries_);
filler_ = &filler;
HeapIterator iterator2;
for (HeapObject* obj = iterator2.next();
obj != NULL;
obj = iterator2.next()) {
iterator.reset();
for (HeapObject* obj = iterator.next(); obj != NULL; obj = iterator.next()) {
ExtractReferences(obj);
}
SetRootGcRootsReference();
Heap::IterateRoots(&extractor, VISIT_ONLY_STRONG);
}
......@@ -1825,25 +1903,8 @@ HeapEntry* HeapSnapshotGenerator::GetEntry(Object* obj) {
if (!obj->IsHeapObject()) return NULL;
HeapObject* object = HeapObject::cast(obj);
HeapEntry* entry = entries_.Map(object);
// A new entry.
if (entry == NULL) {
if (obj->IsJSGlobalPropertyCell()) {
Object* cell_target = JSGlobalPropertyCell::cast(obj)->value();
entry = GetEntry(cell_target);
// If GPC references an object that we have interest in (see
// HeapSnapshot::AddEntry, WillAddEntry), add the object. We
// don't store HeapEntries for GPCs. Instead, we make our hash
// map to point to object's HeapEntry by GPCs address.
if (entry != NULL) {
entries_.Alias(object, HeapObject::cast(cell_target));
}
return entry;
}
if (snapshot_->WillAddEntry(object)) entry = filler_->AddEntry(object);
}
if (entry == NULL) entry = filler_->AddEntry(object);
return entry;
}
......@@ -1852,43 +1913,44 @@ class IndexedReferencesExtractor : public ObjectVisitor {
public:
IndexedReferencesExtractor(HeapSnapshotGenerator* generator,
HeapObject* parent_obj,
HeapEntry* parent_entry)
HeapEntry* parent_entry,
HeapObjectsSet* known_references = NULL)
: generator_(generator),
parent_obj_(parent_obj),
parent_(parent_entry),
known_references_(known_references),
next_index_(1) {
}
void VisitPointer(Object** o) {
generator_->SetElementReference(parent_obj_, parent_, next_index_++, *o);
}
void VisitPointers(Object** start, Object** end) {
for (Object** p = start; p < end; p++) VisitPointer(p);
for (Object** p = start; p < end; p++) {
if (!known_references_ || !known_references_->Contains(*p)) {
generator_->SetHiddenReference(parent_obj_, parent_, next_index_++, *p);
}
}
}
private:
HeapSnapshotGenerator* generator_;
HeapObject* parent_obj_;
HeapEntry* parent_;
HeapObjectsSet* known_references_;
int next_index_;
};
void HeapSnapshotGenerator::ExtractReferences(HeapObject* obj) {
// We need to reference JS global objects from snapshot's root.
// We use JSGlobalProxy because this is what embedder (e.g. browser)
// uses for the global object.
if (obj->IsJSGlobalProxy()) {
JSGlobalProxy* proxy = JSGlobalProxy::cast(obj);
SetRootReference(proxy->map()->prototype());
return;
}
HeapEntry* entry = GetEntry(obj);
if (entry == NULL) return; // No interest in this object.
if (obj->IsJSObject()) {
known_references_.Clear();
if (obj->IsJSGlobalProxy()) {
// We need to reference JS global objects from snapshot's root.
// We use JSGlobalProxy because this is what embedder (e.g. browser)
// uses for the global object.
JSGlobalProxy* proxy = JSGlobalProxy::cast(obj);
SetRootShortcutReference(proxy->map()->prototype());
IndexedReferencesExtractor refs_extractor(this, obj, entry);
obj->Iterate(&refs_extractor);
} else if (obj->IsJSObject()) {
JSObject* js_obj = JSObject::cast(obj);
ExtractClosureReferences(js_obj, entry);
ExtractPropertyReferences(js_obj, entry);
......@@ -1903,16 +1965,16 @@ void HeapSnapshotGenerator::ExtractReferences(HeapObject* obj) {
obj, entry, Heap::prototype_symbol(), js_fun->prototype());
}
}
IndexedReferencesExtractor refs_extractor(
this, obj, entry, &known_references_);
obj->Iterate(&refs_extractor);
} else if (obj->IsString()) {
if (obj->IsConsString()) {
ConsString* cs = ConsString::cast(obj);
SetInternalReference(obj, entry, "1", cs->first());
SetInternalReference(obj, entry, "2", cs->second());
SetInternalReference(obj, entry, 1, cs->first());
SetInternalReference(obj, entry, 2, cs->second());
}
} else if (obj->IsCode() || obj->IsSharedFunctionInfo() || obj->IsScript()) {
IndexedReferencesExtractor refs_extractor(this, obj, entry);
obj->Iterate(&refs_extractor);
} else if (obj->IsFixedArray()) {
} else {
IndexedReferencesExtractor refs_extractor(this, obj, entry);
obj->Iterate(&refs_extractor);
}
......@@ -1967,8 +2029,17 @@ void HeapSnapshotGenerator::ExtractPropertyReferences(JSObject* js_obj,
for (int i = 0; i < length; ++i) {
Object* k = dictionary->KeyAt(i);
if (dictionary->IsKey(k)) {
Object* target = dictionary->ValueAt(i);
SetPropertyReference(
js_obj, entry, String::cast(k), dictionary->ValueAt(i));
js_obj, entry, String::cast(k), target);
// We assume that global objects can only have slow properties.
if (target->IsJSGlobalPropertyCell()) {
SetPropertyShortcutReference(js_obj,
entry,
String::cast(k),
JSGlobalPropertyCell::cast(
target)->value());
}
}
}
}
......@@ -2024,6 +2095,7 @@ void HeapSnapshotGenerator::SetClosureReference(HeapObject* parent_obj,
collection_->GetName(reference_name),
child_obj,
child_entry);
known_references_.Insert(child_obj);
}
}
......@@ -2034,8 +2106,13 @@ void HeapSnapshotGenerator::SetElementReference(HeapObject* parent_obj,
Object* child_obj) {
HeapEntry* child_entry = GetEntry(child_obj);
if (child_entry != NULL) {
filler_->SetElementReference(
parent_obj, parent_entry, index, child_obj, child_entry);
filler_->SetIndexedReference(HeapGraphEdge::kElement,
parent_obj,
parent_entry,
index,
child_obj,
child_entry);
known_references_.Insert(child_obj);
}
}
......@@ -2052,6 +2129,7 @@ void HeapSnapshotGenerator::SetInternalReference(HeapObject* parent_obj,
reference_name,
child_obj,
child_entry);
known_references_.Insert(child_obj);
}
}
......@@ -2068,6 +2146,23 @@ void HeapSnapshotGenerator::SetInternalReference(HeapObject* parent_obj,
collection_->GetName(index),
child_obj,
child_entry);
known_references_.Insert(child_obj);
}
}
void HeapSnapshotGenerator::SetHiddenReference(HeapObject* parent_obj,
HeapEntry* parent_entry,
int index,
Object* child_obj) {
HeapEntry* child_entry = GetEntry(child_obj);
if (child_entry != NULL) {
filler_->SetIndexedReference(HeapGraphEdge::kHidden,
parent_obj,
parent_entry,
index,
child_obj,
child_entry);
}
}
......@@ -2086,14 +2181,45 @@ void HeapSnapshotGenerator::SetPropertyReference(HeapObject* parent_obj,
collection_->GetName(reference_name),
child_obj,
child_entry);
known_references_.Insert(child_obj);
}
}
void HeapSnapshotGenerator::SetRootReference(Object* child_obj) {
void HeapSnapshotGenerator::SetPropertyShortcutReference(
HeapObject* parent_obj,
HeapEntry* parent_entry,
String* reference_name,
Object* child_obj) {
HeapEntry* child_entry = GetEntry(child_obj);
if (child_entry != NULL) {
filler_->SetNamedReference(HeapGraphEdge::kShortcut,
parent_obj,
parent_entry,
collection_->GetName(reference_name),
child_obj,
child_entry);
}
}
void HeapSnapshotGenerator::SetRootGcRootsReference() {
filler_->SetRootGcRootsReference();
}
void HeapSnapshotGenerator::SetRootShortcutReference(Object* child_obj) {
HeapEntry* child_entry = GetEntry(child_obj);
ASSERT(child_entry != NULL);
filler_->SetRootReference(child_obj, child_entry);
filler_->SetRootShortcutReference(child_obj, child_entry);
}
void HeapSnapshotGenerator::SetGcRootsReference(Object* child_obj) {
HeapEntry* child_entry = GetEntry(child_obj);
if (child_entry != NULL) {
filler_->SetStrongRootReference(child_obj, child_entry);
}
}
......@@ -2101,11 +2227,11 @@ void HeapSnapshotsDiff::CreateRoots(int additions_count, int deletions_count) {
raw_additions_root_ =
NewArray<char>(HeapEntry::EntriesSize(1, additions_count, 0));
additions_root()->Init(
snapshot2_, HeapEntry::kInternal, "", 0, 0, additions_count, 0);
snapshot2_, HeapEntry::kHidden, "", 0, 0, additions_count, 0);
raw_deletions_root_ =
NewArray<char>(HeapEntry::EntriesSize(1, deletions_count, 0));
deletions_root()->Init(
snapshot1_, HeapEntry::kInternal, "", 0, 0, deletions_count, 0);
snapshot1_, HeapEntry::kHidden, "", 0, 0, deletions_count, 0);
}
......@@ -2324,7 +2450,8 @@ void HeapSnapshotJSONSerializer::SerializeEdge(HeapGraphEdge* edge) {
writer_->AddCharacter(',');
writer_->AddNumber(edge->type());
writer_->AddCharacter(',');
if (edge->type() == HeapGraphEdge::kElement) {
if (edge->type() == HeapGraphEdge::kElement
|| edge->type() == HeapGraphEdge::kHidden) {
writer_->AddNumber(edge->index());
} else {
writer_->AddNumber(GetStringId(edge->name()));
......@@ -2355,13 +2482,13 @@ void HeapSnapshotJSONSerializer::SerializeNode(HeapEntry* entry) {
void HeapSnapshotJSONSerializer::SerializeNodes() {
// The first (zero) item of nodes array is a JSON-ified object
// describing node serialization layout.
// We use a set of macros to improve readability.
// The first (zero) item of nodes array is an object describing node
// serialization layout. We use a set of macros to improve
// readability.
#define JSON_A(s) "["s"]"
#define JSON_O(s) "{"s"}"
#define JSON_S(s) "\\\""s"\\\""
writer_->AddString("\"" JSON_O(
#define JSON_S(s) "\""s"\""
writer_->AddString(JSON_O(
JSON_S("fields") ":" JSON_A(
JSON_S("type")
"," JSON_S("name")
......@@ -2371,7 +2498,7 @@ void HeapSnapshotJSONSerializer::SerializeNodes() {
"," JSON_S("children"))
"," JSON_S("types") ":" JSON_A(
JSON_A(
JSON_S("internal")
JSON_S("hidden")
"," JSON_S("array")
"," JSON_S("string")
"," JSON_S("object")
......@@ -2393,9 +2520,11 @@ void HeapSnapshotJSONSerializer::SerializeNodes() {
JSON_S("context")
"," JSON_S("element")
"," JSON_S("property")
"," JSON_S("internal"))
"," JSON_S("internal")
"," JSON_S("hidden")
"," JSON_S("shortcut"))
"," JSON_S("string_or_number")
"," JSON_S("node"))))) "\"");
"," JSON_S("node"))))));
#undef JSON_S
#undef JSON_O
#undef JSON_A
......
src/profile-generator.h
View file @ 051f314a
......@@ -439,22 +439,26 @@ class HeapGraphEdge BASE_EMBEDDED {
kContextVariable = v8::HeapGraphEdge::kContextVariable,
kElement = v8::HeapGraphEdge::kElement,
kProperty = v8::HeapGraphEdge::kProperty,
kInternal = v8::HeapGraphEdge::kInternal
kInternal = v8::HeapGraphEdge::kInternal,
kHidden = v8::HeapGraphEdge::kHidden,
kShortcut = v8::HeapGraphEdge::kShortcut
};
HeapGraphEdge() { }
void Init(int child_index, Type type, const char* name, HeapEntry* to);
void Init(int child_index, Type type, int index, HeapEntry* to);
void Init(int child_index, int index, HeapEntry* to);
Type type() { return static_cast<Type>(type_); }
int index() {
ASSERT(type_ == kElement);
ASSERT(type_ == kElement || type_ == kHidden);
return index_;
}
const char* name() {
ASSERT(type_ == kContextVariable
|| type_ == kProperty
|| type_ == kInternal);
|| type_ == kInternal
|| type_ == kShortcut);
return name_;
}
HeapEntry* to() { return to_; }
......@@ -462,8 +466,8 @@ class HeapGraphEdge BASE_EMBEDDED {
HeapEntry* From();
private:
int child_index_ : 30;
unsigned type_ : 2;
int child_index_ : 29;
unsigned type_ : 3;
union {
int index_;
const char* name_;
......@@ -500,7 +504,7 @@ class HeapSnapshot;
class HeapEntry BASE_EMBEDDED {
public:
enum Type {
kInternal = v8::HeapGraphNode::kInternal,
kHidden = v8::HeapGraphNode::kHidden,
kArray = v8::HeapGraphNode::kArray,
kString = v8::HeapGraphNode::kString,
kObject = v8::HeapGraphNode::kObject,
......@@ -547,8 +551,11 @@ class HeapEntry BASE_EMBEDDED {
void ApplyAndPaintAllReachable(Visitor* visitor);
void PaintAllReachable();
void SetElementReference(
int child_index, int index, HeapEntry* entry, int retainer_index);
void SetIndexedReference(HeapGraphEdge::Type type,
int child_index,
int index,
HeapEntry* entry,
int retainer_index);
void SetNamedReference(HeapGraphEdge::Type type,
int child_index,
const char* name,
......@@ -668,12 +675,12 @@ class HeapSnapshot {
const char* title() { return title_; }
unsigned uid() { return uid_; }
HeapEntry* root() { return root_entry_; }
HeapEntry* gc_roots() { return gc_roots_entry_; }
void AllocateEntries(
int entries_count, int children_count, int retainers_count);
HeapEntry* AddEntry(
HeapObject* object, int children_count, int retainers_count);
bool WillAddEntry(HeapObject* object);
HeapEntry* AddEntry(HeapEntry::Type type,
const char* name,
uint64_t id,
......@@ -693,7 +700,8 @@ class HeapSnapshot {
void Print(int max_depth);
void PrintEntriesSize();
static HeapObject *const kInternalRootObject;
static HeapObject* const kInternalRootObject;
static HeapObject* const kGcRootsObject;
private:
HeapEntry* AddEntry(HeapObject* object,
......@@ -702,14 +710,13 @@ class HeapSnapshot {
int children_count,
int retainers_count);
HeapEntry* GetNextEntryToInit();
static int GetObjectSize(HeapObject* obj);
static int CalculateNetworkSize(JSObject* obj);
HeapSnapshotsCollection* collection_;
Type type_;
const char* title_;
unsigned uid_;
HeapEntry* root_entry_;
HeapEntry* gc_roots_entry_;
char* raw_entries_;
List<HeapEntry*> entries_;
bool entries_sorted_;
......@@ -733,6 +740,10 @@ class HeapObjectsMap {
uint64_t FindObject(Address addr);
void MoveObject(Address from, Address to);
static const uint64_t kInternalRootObjectId;
static const uint64_t kGcRootsObjectId;
static const uint64_t kFirstAvailableObjectId;
private:
struct EntryInfo {
explicit EntryInfo(uint64_t id) : id(id), accessed(true) { }
......@@ -868,9 +879,6 @@ class HeapEntriesMap {
HeapEntriesMap();
~HeapEntriesMap();
// Aliasing is used for skipping intermediate proxy objects, like
// JSGlobalPropertyCell.
void Alias(HeapObject* from, HeapObject* to);
HeapEntry* Map(HeapObject* object);
void Pair(HeapObject* object, HeapEntry* entry);
void CountReference(HeapObject* from, HeapObject* to,
......@@ -894,41 +902,45 @@ class HeapEntriesMap {
int retainers_count;
};
uint32_t Hash(HeapObject* object) {
static uint32_t Hash(HeapObject* object) {
return ComputeIntegerHash(
static_cast<uint32_t>(reinterpret_cast<uintptr_t>(object)));
}
static bool HeapObjectsMatch(void* key1, void* key2) { return key1 == key2; }
bool IsAlias(void* ptr) {
return reinterpret_cast<intptr_t>(ptr) & kAliasTag;
}
void* MakeAlias(void* ptr) {
return reinterpret_cast<void*>(reinterpret_cast<intptr_t>(ptr) | kAliasTag);
}
void* Unalias(void* ptr) {
return reinterpret_cast<void*>(
reinterpret_cast<intptr_t>(ptr) & (~kAliasTag));
}
HashMap entries_;
int entries_count_;
int total_children_count_;
int total_retainers_count_;
static const intptr_t kAliasTag = 1;
friend class HeapObjectsSet;
DISALLOW_COPY_AND_ASSIGN(HeapEntriesMap);
};
class HeapObjectsSet {
public:
HeapObjectsSet();
void Clear();
bool Contains(Object* object);
void Insert(Object* obj);
private:
HashMap entries_;
DISALLOW_COPY_AND_ASSIGN(HeapObjectsSet);
};
class HeapSnapshotGenerator {
public:
class SnapshotFillerInterface {
public:
virtual ~SnapshotFillerInterface() { }
virtual HeapEntry* AddEntry(HeapObject* obj) = 0;
virtual void SetElementReference(HeapObject* parent_obj,
virtual void SetIndexedReference(HeapGraphEdge::Type type,
HeapObject* parent_obj,
HeapEntry* parent_entry,
int index,
Object* child_obj,
......@@ -939,8 +951,11 @@ class HeapSnapshotGenerator {
const char* reference_name,
Object* child_obj,
HeapEntry* child_entry) = 0;
virtual void SetRootReference(Object* child_obj,
HeapEntry* child_entry) = 0;
virtual void SetRootGcRootsReference() = 0;
virtual void SetRootShortcutReference(Object* child_obj,
HeapEntry* child_entry) = 0;
virtual void SetStrongRootReference(Object* child_obj,
HeapEntry* child_entry) = 0;
};
explicit HeapSnapshotGenerator(HeapSnapshot* snapshot);
......@@ -969,19 +984,33 @@ class HeapSnapshotGenerator {
HeapEntry* parent,
int index,
Object* child);
void SetHiddenReference(HeapObject* parent_obj,
HeapEntry* parent,
int index,
Object* child);
void SetPropertyReference(HeapObject* parent_obj,
HeapEntry* parent,
String* reference_name,
Object* child);
void SetRootReference(Object* child);
void SetPropertyShortcutReference(HeapObject* parent_obj,
HeapEntry* parent,
String* reference_name,
Object* child);
void SetRootShortcutReference(Object* child);
void SetRootGcRootsReference();
void SetGcRootsReference(Object* child);
HeapSnapshot* snapshot_;
HeapSnapshotsCollection* collection_;
// Mapping from HeapObject* pointers to HeapEntry* pointers.
HeapEntriesMap entries_;
SnapshotFillerInterface* filler_;
// Used during references extraction to mark heap objects that
// are references via non-hidden properties.
HeapObjectsSet known_references_;
friend class IndexedReferencesExtractor;
friend class RootsReferencesExtractor;
DISALLOW_COPY_AND_ASSIGN(HeapSnapshotGenerator);
};
......
test/cctest/test-heap-profiler.cc
View file @ 051f314a
......@@ -411,8 +411,12 @@ class NamedEntriesDetector {
static const v8::HeapGraphNode* GetGlobalObject(
const v8::HeapSnapshot* snapshot) {
CHECK_EQ(1, snapshot->GetRoot()->GetChildrenCount());
return snapshot->GetRoot()->GetChild(0)->GetToNode();
CHECK_EQ(2, snapshot->GetRoot()->GetChildrenCount());
const v8::HeapGraphNode* global_obj =
snapshot->GetRoot()->GetChild(0)->GetToNode();
CHECK_EQ("Object", const_cast<i::HeapEntry*>(
reinterpret_cast<const i::HeapEntry*>(global_obj))->name());
return global_obj;
}
......@@ -479,21 +483,24 @@ TEST(HeapSnapshot) {
// Verify, that JS global object of env2 has '..2' properties.
const v8::HeapGraphNode* a2_node =
GetProperty(global_env2, v8::HeapGraphEdge::kProperty, "a2");
GetProperty(global_env2, v8::HeapGraphEdge::kShortcut, "a2");
CHECK_NE(NULL, a2_node);
CHECK_NE(
NULL, GetProperty(global_env2, v8::HeapGraphEdge::kProperty, "b2_1"));
NULL, GetProperty(global_env2, v8::HeapGraphEdge::kShortcut, "b2_1"));
CHECK_NE(
NULL, GetProperty(global_env2, v8::HeapGraphEdge::kProperty, "b2_2"));
CHECK_NE(NULL, GetProperty(global_env2, v8::HeapGraphEdge::kProperty, "c2"));
NULL, GetProperty(global_env2, v8::HeapGraphEdge::kShortcut, "b2_2"));
CHECK_NE(NULL, GetProperty(global_env2, v8::HeapGraphEdge::kShortcut, "c2"));
// Verify that anything related to '[ABC]1' is not reachable.
NamedEntriesDetector det;
i_snapshot_env2->IterateEntries(&det);
CHECK(det.has_A2);
CHECK(det.has_B2);
CHECK(det.has_C2);
/*
// Currently disabled. Too many retaining paths emerge, need to
// reduce the amount.
// Verify 'a2' object retainers. They are:
// - (global object).a2
// - c2.x1, c2.x2, c2[1]
......@@ -538,6 +545,7 @@ TEST(HeapSnapshot) {
CHECK(has_c2_1_ref);
CHECK(has_b2_1_x_ref);
CHECK(has_b2_2_x_ref);
*/
}
......@@ -550,12 +558,12 @@ TEST(HeapSnapshotObjectSizes) {
CompileRun(
"function X(a, b) { this.a = a; this.b = b; }\n"
"x = new X(new X(), new X());\n"
"x.a.a = x.b;");
"(function() { x.a.a = x.b; })();");
const v8::HeapSnapshot* snapshot =
v8::HeapProfiler::TakeSnapshot(v8::String::New("sizes"));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* x =
GetProperty(global, v8::HeapGraphEdge::kProperty, "x");
GetProperty(global, v8::HeapGraphEdge::kShortcut, "x");
CHECK_NE(NULL, x);
const v8::HeapGraphNode* x_prototype =
GetProperty(x, v8::HeapGraphEdge::kProperty, "__proto__");
......@@ -566,21 +574,9 @@ TEST(HeapSnapshotObjectSizes) {
const v8::HeapGraphNode* x2 =
GetProperty(x, v8::HeapGraphEdge::kProperty, "b");
CHECK_NE(NULL, x2);
CHECK_EQ(
x->GetSelfSize() * 3,
x->GetReachableSize() - x_prototype->GetReachableSize());
CHECK_EQ(
x->GetSelfSize() * 3, x->GetRetainedSize());
CHECK_EQ(
x1->GetSelfSize() * 2,
x1->GetReachableSize() - x_prototype->GetReachableSize());
CHECK_EQ(
x1->GetSelfSize(), x1->GetRetainedSize());
CHECK_EQ(
x2->GetSelfSize(),
x2->GetReachableSize() - x_prototype->GetReachableSize());
CHECK_EQ(
x2->GetSelfSize(), x2->GetRetainedSize());
CHECK_EQ(x->GetSelfSize() * 3, x->GetRetainedSize());
CHECK_EQ(x1->GetSelfSize(), x1->GetRetainedSize());
CHECK_EQ(x2->GetSelfSize(), x2->GetRetainedSize());
}
......@@ -622,15 +618,15 @@ TEST(HeapSnapshotCodeObjects) {
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* compiled =
GetProperty(global, v8::HeapGraphEdge::kProperty, "compiled");
GetProperty(global, v8::HeapGraphEdge::kShortcut, "compiled");
CHECK_NE(NULL, compiled);
CHECK_EQ(v8::HeapGraphNode::kClosure, compiled->GetType());
const v8::HeapGraphNode* lazy =
GetProperty(global, v8::HeapGraphEdge::kProperty, "lazy");
GetProperty(global, v8::HeapGraphEdge::kShortcut, "lazy");
CHECK_NE(NULL, lazy);
CHECK_EQ(v8::HeapGraphNode::kClosure, lazy->GetType());
const v8::HeapGraphNode* anonymous =
GetProperty(global, v8::HeapGraphEdge::kProperty, "anonymous");
GetProperty(global, v8::HeapGraphEdge::kShortcut, "anonymous");
CHECK_NE(NULL, anonymous);
CHECK_EQ(v8::HeapGraphNode::kClosure, anonymous->GetType());
v8::String::AsciiValue anonymous_name(anonymous->GetName());
......@@ -682,9 +678,9 @@ TEST(HeapSnapshotHeapNumbers) {
const v8::HeapSnapshot* snapshot =
v8::HeapProfiler::TakeSnapshot(v8::String::New("numbers"));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
CHECK_EQ(NULL, GetProperty(global, v8::HeapGraphEdge::kProperty, "a"));
CHECK_EQ(NULL, GetProperty(global, v8::HeapGraphEdge::kShortcut, "a"));
const v8::HeapGraphNode* b =
GetProperty(global, v8::HeapGraphEdge::kProperty, "b");
GetProperty(global, v8::HeapGraphEdge::kShortcut, "b");
CHECK_NE(NULL, b);
CHECK_EQ(v8::HeapGraphNode::kHeapNumber, b->GetType());
}
......@@ -808,12 +804,12 @@ TEST(HeapSnapshotsDiff) {
if (node->GetType() == v8::HeapGraphNode::kObject) {
v8::String::AsciiValue node_name(node->GetName());
if (strcmp(*node_name, "A2") == 0) {
CHECK(IsNodeRetainedAs(node, v8::HeapGraphEdge::kProperty, "a"));
CHECK(IsNodeRetainedAs(node, v8::HeapGraphEdge::kShortcut, "a"));
CHECK(!found_A);
found_A = true;
s1_A_id = node->GetId();
} else if (strcmp(*node_name, "B") == 0) {
CHECK(IsNodeRetainedAs(node, v8::HeapGraphEdge::kProperty, "b2"));
CHECK(IsNodeRetainedAs(node, v8::HeapGraphEdge::kShortcut, "b2"));
CHECK(!found_B);
found_B = true;
}
......@@ -832,7 +828,7 @@ TEST(HeapSnapshotsDiff) {
if (node->GetType() == v8::HeapGraphNode::kObject) {
v8::String::AsciiValue node_name(node->GetName());
if (strcmp(*node_name, "A") == 0) {
CHECK(IsNodeRetainedAs(node, v8::HeapGraphEdge::kProperty, "a"));
CHECK(IsNodeRetainedAs(node, v8::HeapGraphEdge::kShortcut, "a"));
CHECK(!found_A_del);
found_A_del = true;
s2_A_id = node->GetId();
......@@ -858,37 +854,6 @@ TEST(HeapSnapshotRootPreservedAfterSorting) {
}
namespace v8 {
namespace internal {
class HeapSnapshotTester {
public:
static int CalculateNetworkSize(JSObject* obj) {
return HeapSnapshot::CalculateNetworkSize(obj);
}
};
} } // namespace v8::internal
// http://code.google.com/p/v8/issues/detail?id=822
// Trying to call CalculateNetworkSize on an object with elements set
// to non-FixedArray may cause an assertion error in debug builds.
TEST(Issue822) {
v8::HandleScope scope;
LocalContext context;
const int kElementCount = 260;
uint8_t* pixel_data = reinterpret_cast<uint8_t*>(malloc(kElementCount));
i::Handle<i::PixelArray> pixels = i::Factory::NewPixelArray(kElementCount,
pixel_data);
v8::Handle<v8::Object> obj = v8::Object::New();
// Set the elements to be the pixels.
obj->SetIndexedPropertiesToPixelData(pixel_data, kElementCount);
i::Handle<i::JSObject> jsobj = v8::Utils::OpenHandle(*obj);
// This call must not cause an assertion error in debug builds.
i::HeapSnapshotTester::CalculateNetworkSize(*jsobj);
}
static const v8::HeapGraphNode* GetChild(
const v8::HeapGraphNode* node,
v8::HeapGraphNode::Type type,
......@@ -932,13 +897,13 @@ TEST(AggregatedHeapSnapshot) {
v8::HeapProfiler::TakeSnapshot(
v8::String::New("agg"), v8::HeapSnapshot::kAggregated);
const v8::HeapGraphNode* strings = GetChild(snapshot->GetRoot(),
v8::HeapGraphNode::kInternal,
v8::HeapGraphNode::kHidden,
"STRING_TYPE");
CHECK_NE(NULL, strings);
CHECK_NE(0, strings->GetSelfSize());
CHECK_NE(0, strings->GetInstancesCount());
const v8::HeapGraphNode* maps = GetChild(snapshot->GetRoot(),
v8::HeapGraphNode::kInternal,
v8::HeapGraphNode::kHidden,
"MAP_TYPE");
CHECK_NE(NULL, maps);
CHECK_NE(0, maps->GetSelfSize());
......@@ -1073,13 +1038,9 @@ TEST(HeapSnapshotJSONSerialization) {
CHECK(parsed_snapshot->Has(v8::String::New("nodes")));
CHECK(parsed_snapshot->Has(v8::String::New("strings")));
// Verify that nodes meta-info is valid JSON.
v8::Local<v8::Value> nodes_meta_parse_result = CompileRun(
"var parsed_meta = JSON.parse(parsed.nodes[0]); true;");
CHECK(!nodes_meta_parse_result.IsEmpty());
// Get node and edge "member" offsets.
v8::Local<v8::Value> meta_analysis_result = CompileRun(
"var parsed_meta = parsed.nodes[0];\n"
"var children_count_offset ="
" parsed_meta.fields.indexOf('children_count');\n"
"var children_offset ="
......@@ -1094,19 +1055,21 @@ TEST(HeapSnapshotJSONSerialization) {
"var child_to_node_offset ="
" children_meta.fields.indexOf('to_node');\n"
"var property_type ="
" children_meta.types[child_type_offset].indexOf('property');");
" children_meta.types[child_type_offset].indexOf('property');\n"
"var shortcut_type ="
" children_meta.types[child_type_offset].indexOf('shortcut');");
CHECK(!meta_analysis_result.IsEmpty());
// A helper function for processing encoded nodes.
CompileRun(
"function GetChildPosByProperty(pos, prop_name) {\n"
"function GetChildPosByProperty(pos, prop_name, prop_type) {\n"
" var nodes = parsed.nodes;\n"
" var strings = parsed.strings;\n"
" for (var i = 0,\n"
" count = nodes[pos + children_count_offset] * child_fields_count;\n"
" i < count; i += child_fields_count) {\n"
" var child_pos = pos + children_offset + i;\n"
" if (nodes[child_pos + child_type_offset] === property_type\n"
" if (nodes[child_pos + child_type_offset] === prop_type\n"
" && strings[nodes[child_pos + child_name_offset]] === prop_name)\n"
" return nodes[child_pos + child_to_node_offset];\n"
" }\n"
......@@ -1117,9 +1080,10 @@ TEST(HeapSnapshotJSONSerialization) {
"GetChildPosByProperty(\n"
" GetChildPosByProperty(\n"
" GetChildPosByProperty("
" parsed.nodes[1 + children_offset + child_to_node_offset],\"b\"),\n"
" \"x\"),"
" \"s\")");
" parsed.nodes[1 + children_offset + child_to_node_offset],"
" \"b\",shortcut_type),\n"
" \"x\", property_type),"
" \"s\", property_type)");
CHECK(!string_obj_pos_val.IsEmpty());
int string_obj_pos =
static_cast<int>(string_obj_pos_val->ToNumber()->Value());
......
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