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// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/execution/protectors.h"
#include "src/execution/isolate-inl.h"
#include "src/execution/protectors-inl.h"
#include "src/handles/handles-inl.h"
#include "src/objects/contexts.h"
#include "src/objects/property-cell.h"
#include "src/objects/smi.h"
#include "src/tracing/trace-event.h"
#include "src/utils/utils.h"
namespace v8 {
namespace internal {
namespace {
void TraceProtectorInvalidation(const char* protector_name) {
DCHECK(FLAG_trace_protector_invalidation);
static constexpr char kInvalidateProtectorTracingCategory[] =
"V8.InvalidateProtector";
static constexpr char kInvalidateProtectorTracingArg[] = "protector-name";
DCHECK(FLAG_trace_protector_invalidation);
// TODO(jgruber): Remove the PrintF once tracing can output to stdout.
i::PrintF("Invalidating protector cell %s\n", protector_name);
TRACE_EVENT_INSTANT1("v8", kInvalidateProtectorTracingCategory,
TRACE_EVENT_SCOPE_THREAD, kInvalidateProtectorTracingArg,
protector_name);
}
// Static asserts to ensure we have a use counter for every protector. If this
// fails, add the use counter in V8 and chromium. Note: IsDefined is not
// strictly needed but clarifies the intent of the static assert.
constexpr bool IsDefined(v8::Isolate::UseCounterFeature) { return true; }
#define V(Name, ...) \
STATIC_ASSERT(IsDefined(v8::Isolate::kInvalidated##Name##Protector));
DECLARED_PROTECTORS_ON_ISOLATE(V)
#undef V
} // namespace
#define INVALIDATE_PROTECTOR_ON_ISOLATE_DEFINITION(name, unused_index, cell) \
void Protectors::Invalidate##name(Isolate* isolate) { \
DCHECK(isolate->factory()->cell()->value().IsSmi()); \
DCHECK(Is##name##Intact(isolate)); \
if (FLAG_trace_protector_invalidation) { \
TraceProtectorInvalidation(#name); \
} \
isolate->CountUsage(v8::Isolate::kInvalidated##name##Protector); \
PropertyCell::SetValueWithInvalidation( \
isolate, #cell, isolate->factory()->cell(), \
handle(Smi::FromInt(kProtectorInvalid), isolate)); \
DCHECK(!Is##name##Intact(isolate)); \
}
DECLARED_PROTECTORS_ON_ISOLATE(INVALIDATE_PROTECTOR_ON_ISOLATE_DEFINITION)
#undef INVALIDATE_PROTECTOR_ON_ISOLATE_DEFINITION
} // namespace internal
} // namespace v8
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