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/*
* Copyright (C) 2007-2009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/bindings/core/v8/scheduled_action.h"
#include "third_party/blink/renderer/bindings/core/v8/binding_security.h"
#include "third_party/blink/renderer/bindings/core/v8/script_controller.h"
#include "third_party/blink/renderer/bindings/core/v8/script_source_code.h"
#include "third_party/blink/renderer/bindings/core/v8/script_value.h"
#include "third_party/blink/renderer/bindings/core/v8/source_location.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_function.h"
#include "third_party/blink/renderer/bindings/core/v8/worker_or_worklet_script_controller.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/workers/worker_global_scope.h"
#include "third_party/blink/renderer/core/workers/worker_thread.h"
#include "third_party/blink/renderer/platform/bindings/script_state.h"
#include "third_party/blink/renderer/platform/heap/heap.h"
#include "third_party/blink/renderer/platform/instrumentation/tracing/trace_event.h"
#include "third_party/blink/renderer/platform/instrumentation/use_counter.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"
namespace blink {
ScheduledAction::ScheduledAction(ScriptState* script_state,
ExecutionContext* target,
V8Function* handler,
const HeapVector<ScriptValue>& arguments)
: script_state_(
MakeGarbageCollected<ScriptStateProtectingContext>(script_state)) {
if (script_state->World().IsWorkerWorld() ||
BindingSecurity::ShouldAllowAccessTo(
EnteredDOMWindow(script_state->GetIsolate()),
To<LocalDOMWindow>(target),
BindingSecurity::ErrorReportOption::kDoNotReport)) {
function_ = handler;
arguments_ = arguments;
} else {
UseCounter::Count(target, WebFeature::kScheduledActionIgnored);
}
}
ScheduledAction::ScheduledAction(ScriptState* script_state,
ExecutionContext* target,
const String& handler)
: script_state_(
MakeGarbageCollected<ScriptStateProtectingContext>(script_state)) {
if (script_state->World().IsWorkerWorld() ||
BindingSecurity::ShouldAllowAccessTo(
EnteredDOMWindow(script_state->GetIsolate()),
To<LocalDOMWindow>(target),
BindingSecurity::ErrorReportOption::kDoNotReport)) {
code_ = handler;
} else {
UseCounter::Count(target, WebFeature::kScheduledActionIgnored);
}
}
ScheduledAction::~ScheduledAction() {
// Verify that owning DOMTimer has eagerly disposed.
DCHECK(!script_state_);
DCHECK(!function_);
DCHECK(arguments_.IsEmpty());
DCHECK(code_.IsNull());
}
void ScheduledAction::Dispose() {
script_state_->Reset();
script_state_.Clear();
if (function_) {
// setTimeout is pretty common and heavily used, and we need a special
// optimization to let V8 Scavenger GC collect the function object as
// soon as possible in order to reduce the memory usage.
// See also https://crbug.com/919474 and https://crbug.com/919475 .
//
// This optimization is safe because this ScheduledAction *owns* |function_|
// (i.e. no other objects reference |function_|) and this ScheduledAction
// immediately discards |function_| (so never uses it).
function_->DisposeV8FunctionImmediatelyToReduceMemoryFootprint();
function_.Clear();
}
arguments_.clear();
code_ = String();
}
void ScheduledAction::Execute(ExecutionContext* context) {
if (!script_state_->ContextIsValid()) {
DVLOG(1) << "ScheduledAction::execute " << this << ": context is empty";
return;
}
// ExecutionContext::CanExecuteScripts() relies on the current context to
// determine if it is allowed. Enter the scope here.
ScriptState::Scope scope(script_state_->Get());
if (!context->CanExecuteScripts(kAboutToExecuteScript)) {
DVLOG(1) << "ScheduledAction::execute " << this
<< ": window can not execute scripts";
return;
}
// https://html.spec.whatwg.org/C/#timer-initialisation-steps
if (function_) {
DVLOG(1) << "ScheduledAction::execute " << this << ": have function";
function_->InvokeAndReportException(context->ToScriptWrappable(),
arguments_);
return;
}
// We use |SanitizeScriptErrors::kDoNotSanitize| because muted errors flag is
// not set in https://html.spec.whatwg.org/C/#timer-initialisation-steps
DVLOG(1) << "ScheduledAction::execute " << this << ": executing from source";
if (LocalDOMWindow* window = DynamicTo<LocalDOMWindow>(context)) {
window->GetScriptController().ExecuteScriptAndReturnValue(
script_state_->GetContext(),
ScriptSourceCode(code_,
ScriptSourceLocationType::kEvalForScheduledAction),
KURL(), SanitizeScriptErrors::kDoNotSanitize);
} else {
WorkerGlobalScope* worker = To<WorkerGlobalScope>(context);
DCHECK(worker->GetThread()->IsCurrentThread());
worker->ScriptController()->EvaluateAndReturnValue(
ScriptSourceCode(code_,
ScriptSourceLocationType::kEvalForScheduledAction),
SanitizeScriptErrors::kDoNotSanitize);
}
}
void ScheduledAction::Trace(Visitor* visitor) const {
visitor->Trace(script_state_);
visitor->Trace(function_);
visitor->Trace(arguments_);
}
} // namespace blink
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