Heap explorer: Show representation of strings.
* src/profile-generator.cc (V8HeapExplorer::GetSystemEntryName): For maps of strings, return a name that encodes the representation strategy used for the strings. (V8HeapExplorer::ExtractReferences): For strings, visit the maps as well, so that the user can see what representation is used for their strings. See http://wingolog.org/pub/string-representations.png for an example of what it looks like. BUG= Review URL: https://chromiumcodereview.appspot.com/11344021 Patch from Andy Wingo <wingo@igalia.com>. git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12973 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
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@ -1774,7 +1774,14 @@ void V8HeapExplorer::AddRootEntries(SnapshotFillerInterface* filler) {
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const char* V8HeapExplorer::GetSystemEntryName(HeapObject* object) {
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const char* V8HeapExplorer::GetSystemEntryName(HeapObject* object) {
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switch (object->map()->instance_type()) {
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switch (object->map()->instance_type()) {
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case MAP_TYPE: return "system / Map";
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case MAP_TYPE:
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switch (Map::cast(object)->instance_type()) {
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#define MAKE_STRING_MAP_CASE(instance_type, size, name, Name) \
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case instance_type: return "system / Map (" #Name ")";
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STRING_TYPE_LIST(MAKE_STRING_MAP_CASE)
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#undef MAKE_STRING_MAP_CASE
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default: return "system / Map";
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}
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case JS_GLOBAL_PROPERTY_CELL_TYPE: return "system / JSGlobalPropertyCell";
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case JS_GLOBAL_PROPERTY_CELL_TYPE: return "system / JSGlobalPropertyCell";
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case FOREIGN_TYPE: return "system / Foreign";
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case FOREIGN_TYPE: return "system / Foreign";
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case ODDBALL_TYPE: return "system / Oddball";
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case ODDBALL_TYPE: return "system / Oddball";
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@ -1851,7 +1858,6 @@ void V8HeapExplorer::ExtractReferences(HeapObject* obj) {
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ExtractJSObjectReferences(entry, JSObject::cast(obj));
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ExtractJSObjectReferences(entry, JSObject::cast(obj));
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} else if (obj->IsString()) {
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} else if (obj->IsString()) {
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ExtractStringReferences(entry, String::cast(obj));
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ExtractStringReferences(entry, String::cast(obj));
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extract_indexed_refs = false;
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} else if (obj->IsContext()) {
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} else if (obj->IsContext()) {
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ExtractContextReferences(entry, Context::cast(obj));
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ExtractContextReferences(entry, Context::cast(obj));
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} else if (obj->IsMap()) {
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} else if (obj->IsMap()) {
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@ -1966,11 +1972,14 @@ void V8HeapExplorer::ExtractJSObjectReferences(
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void V8HeapExplorer::ExtractStringReferences(int entry, String* string) {
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void V8HeapExplorer::ExtractStringReferences(int entry, String* string) {
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if (string->IsConsString()) {
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if (string->IsConsString()) {
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ConsString* cs = ConsString::cast(string);
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ConsString* cs = ConsString::cast(string);
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SetInternalReference(cs, entry, "first", cs->first());
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SetInternalReference(cs, entry, "first", cs->first(),
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SetInternalReference(cs, entry, "second", cs->second());
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ConsString::kFirstOffset);
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SetInternalReference(cs, entry, "second", cs->second(),
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ConsString::kSecondOffset);
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} else if (string->IsSlicedString()) {
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} else if (string->IsSlicedString()) {
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SlicedString* ss = SlicedString::cast(string);
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SlicedString* ss = SlicedString::cast(string);
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SetInternalReference(ss, entry, "parent", ss->parent());
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SetInternalReference(ss, entry, "parent", ss->parent(),
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SlicedString::kParentOffset);
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}
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}
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}
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}
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