Heap Snapshot should include different Edge types and data (Property, Index, Variable)
https://bugs.webkit.org/show_bug.cgi?id=154937
Patch by Joseph Pecoraro <pecoraro@apple.com> on 2016-03-07
Reviewed by Geoffrey Garen.
* heap/SlotVisitor.cpp:
(JSC::SlotVisitor::appendHidden):
* heap/SlotVisitor.h:
* heap/SlotVisitorInlines.h:
(JSC::SlotVisitor::appendHidden):
(JSC::SlotVisitor::appendValuesHidden):
Add new visit methods to visit a reference without snapshotting the edge.
* heap/Heap.cpp:
(JSC::AddExtraHeapSnapshotEdges::AddExtraHeapSnapshotEdges):
(JSC::AddExtraHeapSnapshotEdges::operator()):
(JSC::Heap::addHeapSnapshotEdges):
(JSC::Heap::removeDeadHeapSnapshotNodes):
(JSC::Heap::collectImpl):
* heap/Heap.h:
After marking, visit the live cells for a chance to record extra
heap snapshotting information about the cell.
* heap/HeapSnapshotBuilder.cpp:
(JSC::HeapSnapshotBuilder::appendNode):
(JSC::HeapSnapshotBuilder::appendEdge):
(JSC::HeapSnapshotBuilder::appendPropertyNameEdge):
(JSC::HeapSnapshotBuilder::appendVariableNameEdge):
(JSC::HeapSnapshotBuilder::appendIndexEdge):
(JSC::HeapSnapshotBuilder::json):
* heap/HeapSnapshotBuilder.h:
(JSC::HeapSnapshotEdge::HeapSnapshotEdge):
Construct edges with extra data.
* runtime/ClassInfo.h:
* runtime/JSCell.cpp:
(JSC::JSCell::heapSnapshot):
* runtime/JSCell.h:
Add a new method to provide cells with an opportunity to provide
extra heap snapshotting information.
* runtime/JSObject.cpp:
(JSC::JSObject::visitButterfly):
(JSC::JSObject::visitChildren):
(JSC::JSObject::heapSnapshot):
(JSC::JSFinalObject::visitChildren):
* runtime/JSObject.h:
Capture object property names and index names when heap snapshotting.
Do not include them as internal edges in normal visitChildren.
* runtime/JSEnvironmentRecord.cpp:
(JSC::JSEnvironmentRecord::visitChildren):
(JSC::JSEnvironmentRecord::heapSnapshot):
* runtime/JSEnvironmentRecord.h:
* runtime/JSSegmentedVariableObject.cpp:
(JSC::JSSegmentedVariableObject::visitChildren):
(JSC::JSSegmentedVariableObject::heapSnapshot):
* runtime/JSSegmentedVariableObject.h:
Capture scope variable names when heap snapshotting.
* runtime/Structure.cpp:
(JSC::Structure::visitChildren):
* runtime/Structure.h:
* runtime/StructureInlines.h:
(JSC::Structure::propertyTable):
When performing a heap snapshotting collection, don't clear the
property table so that accessing the table during this GC is okay.
* tests/heapProfiler/driver/driver.js:
* tests/heapProfiler/property-edge-types.js: Added.
* tests/heapProfiler/variable-edge-types.js: Added.
Tests covering the different edge types and data we capture.
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@197712 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/Source/JavaScriptCore/runtime/JSCell.cpp b/Source/JavaScriptCore/runtime/JSCell.cpp
index 243b805..8807a7d 100644
--- a/Source/JavaScriptCore/runtime/JSCell.cpp
+++ b/Source/JavaScriptCore/runtime/JSCell.cpp
@@ -65,6 +65,10 @@
{
}
+void JSCell::heapSnapshot(JSCell*, HeapSnapshotBuilder&)
+{
+}
+
bool JSCell::getString(ExecState* exec, String& stringValue) const
{
if (!isString())
