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Store entry id as 32-bit int.

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BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9695046

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11029 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
alexeif@chromium.org 2012-03-13 15:42:26 +00:00
parent 262c8bddd5
commit cd81976065
3 changed files with 6 additions and 23 deletions
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9
src/profile-generator-inl.h
View File

@ -114,15 +114,6 @@ int V8HeapExplorer::GetGcSubrootOrder(HeapObject* subroot) {
HeapObjectsMap::kObjectIdStep);
}
SnapshotObjectId HeapEntry::id() {
union {
Id stored_id;
SnapshotObjectId returned_id;
} id_adaptor = {id_};
return id_adaptor.returned_id;
}
} } // namespace v8::internal
#endif // V8_PROFILE_GENERATOR_INL_H_

13
src/profile-generator.cc
View File

@ -978,12 +978,7 @@ void HeapEntry::Init(HeapSnapshot* snapshot,
children_count_ = children_count;
retainers_count_ = retainers_count;
dominator_ = NULL;
union {
SnapshotObjectId set_id;
Id stored_id;
} id_adaptor = {id};
id_ = id_adaptor.stored_id;
id_ = id;
}
@ -1113,7 +1108,7 @@ template <size_t ptr_size> struct SnapshotSizeConstants;
template <> struct SnapshotSizeConstants<4> {
static const int kExpectedHeapGraphEdgeSize = 12;
static const int kExpectedHeapEntrySize = 36;
static const int kExpectedHeapEntrySize = 32;
static const size_t kMaxSerializableSnapshotRawSize = 256 * MB;
};
@ -1139,10 +1134,10 @@ HeapSnapshot::HeapSnapshot(HeapSnapshotsCollection* collection,
natives_root_entry_(NULL),
raw_entries_(NULL),
entries_sorted_(false) {
STATIC_ASSERT(
STATIC_CHECK(
sizeof(HeapGraphEdge) ==
SnapshotSizeConstants<kPointerSize>::kExpectedHeapGraphEdgeSize);
STATIC_ASSERT(
STATIC_CHECK(
sizeof(HeapEntry) ==
SnapshotSizeConstants<kPointerSize>::kExpectedHeapEntrySize);
for (int i = 0; i < VisitorSynchronization::kNumberOfSyncTags; ++i) {

7
src/profile-generator.h
View File

@ -544,7 +544,7 @@ class HeapEntry BASE_EMBEDDED {
Type type() { return static_cast<Type>(type_); }
const char* name() { return name_; }
void set_name(const char* name) { name_ = name; }
inline SnapshotObjectId id();
inline SnapshotObjectId id() { return id_; }
int self_size() { return self_size_; }
int retained_size() { return retained_size_; }
void add_retained_size(int size) { retained_size_ += size; }
@ -608,12 +608,9 @@ class HeapEntry BASE_EMBEDDED {
int ordered_index_; // Used during dominator tree building.
int retained_size_; // At that moment, there is no retained size yet.
};
SnapshotObjectId id_;
HeapEntry* dominator_;
HeapSnapshot* snapshot_;
struct Id {
uint32_t id1_;
uint32_t id2_;
} id_; // This is to avoid extra padding of 64-bit value.
const char* name_;
DISALLOW_COPY_AND_ASSIGN(HeapEntry);