void JSGlobalData::releaseExecutableMemory()
{
if (dynamicGlobalObject) {
StackPreservingRecompiler recompiler;
HashSet<JSCell*> roots;
heap.getConservativeRegisterRoots(roots);
HashSet<JSCell*>::iterator end = roots.end();
for (HashSet<JSCell*>::iterator ptr = roots.begin(); ptr != end; ++ptr) {
ScriptExecutable* executable = 0;
JSCell* cell = *ptr;
if (cell->inherits(&ScriptExecutable::s_info))
executable = static_cast<ScriptExecutable*>(*ptr);
else if (cell->inherits(&JSFunction::s_info)) {
JSFunction* function = jsCast<JSFunction*>(*ptr);
if (function->isHostFunction())
continue;
executable = function->jsExecutable();
} else
continue;
ASSERT(executable->inherits(&ScriptExecutable::s_info));
executable->unlinkCalls();
if (executable->inherits(&FunctionExecutable::s_info))
recompiler.currentlyExecutingFunctions.add(static_cast<FunctionExecutable*>(executable));
}
heap.objectSpace().forEachCell<StackPreservingRecompiler>(recompiler);
}
m_regExpCache->invalidateCode();
heap.collectAllGarbage();
}
void VM::releaseExecutableMemory()
{
prepareToDiscardCode();
if (entryScope) {
StackPreservingRecompiler recompiler;
HeapIterationScope iterationScope(heap);
HashSet<JSCell*> roots;
heap.getConservativeRegisterRoots(roots);
HashSet<JSCell*>::iterator end = roots.end();
for (HashSet<JSCell*>::iterator ptr = roots.begin(); ptr != end; ++ptr) {
ScriptExecutable* executable = 0;
JSCell* cell = *ptr;
if (cell->inherits(ScriptExecutable::info()))
executable = static_cast<ScriptExecutable*>(*ptr);
else if (cell->inherits(JSFunction::info())) {
JSFunction* function = jsCast<JSFunction*>(*ptr);
if (function->isHostFunction())
continue;
executable = function->jsExecutable();
} else
continue;
ASSERT(executable->inherits(ScriptExecutable::info()));
executable->unlinkCalls();
if (executable->inherits(FunctionExecutable::info()))
recompiler.currentlyExecutingFunctions.add(static_cast<FunctionExecutable*>(executable));
}
heap.objectSpace().forEachLiveCell<StackPreservingRecompiler>(iterationScope, recompiler);
}
m_regExpCache->invalidateCode();
heap.collectAllGarbage();
}
void InspectorHeapAgent::getPreview(ErrorString& errorString, int heapObjectId, Inspector::Protocol::OptOutput<String>* resultString, RefPtr<Inspector::Protocol::Debugger::FunctionDetails>& functionDetails, RefPtr<Inspector::Protocol::Runtime::ObjectPreview>& objectPreview)
{
// Prevent the cell from getting collected as we look it up.
VM& vm = m_environment.vm();
JSLockHolder lock(vm);
DeferGC deferGC(vm.heap);
unsigned heapObjectIdentifier = static_cast<unsigned>(heapObjectId);
const Optional<HeapSnapshotNode> optionalNode = nodeForHeapObjectIdentifier(errorString, heapObjectIdentifier);
if (!optionalNode)
return;
// String preview.
JSCell* cell = optionalNode->cell;
if (cell->isString()) {
*resultString = cell->getString(nullptr);
return;
}
// FIXME: Provide preview information for Internal Objects? CodeBlock, Executable, etc.
Structure* structure = cell->structure(m_environment.vm());
if (!structure) {
errorString = ASCIILiteral("Unable to get object details - Structure");
return;
}
JSGlobalObject* globalObject = structure->globalObject();
if (!globalObject) {
errorString = ASCIILiteral("Unable to get object details - GlobalObject");
return;
}
InjectedScript injectedScript = m_injectedScriptManager.injectedScriptFor(globalObject->globalExec());
if (injectedScript.hasNoValue()) {
errorString = ASCIILiteral("Unable to get object details - InjectedScript");
return;
}
// Function preview.
if (cell->inherits(JSFunction::info())) {
Deprecated::ScriptValue functionScriptValue(m_environment.vm(), JSValue(cell));
injectedScript.functionDetails(errorString, functionScriptValue, &functionDetails);
return;
}
// Object preview.
Deprecated::ScriptValue cellScriptValue(m_environment.vm(), JSValue(cell));
objectPreview = injectedScript.previewValue(cellScriptValue);
}
