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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/performance_manager/v8_memory/v8_context_tracker_helpers.h"
#include "base/check.h"
#include "base/notreached.h"
#include "components/performance_manager/graph/frame_node_impl.h"
#include "components/performance_manager/graph/process_node_impl.h"
#include "components/performance_manager/public/execution_context/execution_context.h"
#include "components/performance_manager/public/execution_context/execution_context_registry.h"
#include "components/performance_manager/public/mojom/v8_contexts.mojom.h"
namespace performance_manager {
namespace v8_memory {
namespace {
bool IsSynchronousIframeAttributionDataExpected(
const execution_context::ExecutionContext* ec) {
DCHECK(ec);
auto* frame = ec->GetFrameNode();
// We only expect iframe data for frames...
if (!frame)
return false;
// ... that aren't main frames (have a parent) ...
if (frame->IsMainFrame())
return false;
auto* parent = frame->GetParentFrameNode();
DCHECK(parent);
// ... where the parent is hosted in the same process ...
if (frame->GetProcessNode() != parent->GetProcessNode())
return false;
// ... and where they are both in the same SiteInstanceGroup (implying they
// are both in the same frame-tree and know directly of each other's
// LocalFrame rather then communicating via a RemoteFrame and a
// RenderFrameProxy).
return frame->GetSiteInstanceGroupId() == parent->GetSiteInstanceGroupId();
}
} // namespace
bool HasCrossProcessParent(const FrameNode* frame_node) {
DCHECK(frame_node);
if (frame_node->IsMainFrame())
return false;
const ProcessNode* process = frame_node->GetProcessNode();
const ProcessNode* parent_process =
frame_node->GetParentFrameNode()->GetProcessNode();
return process != parent_process;
}
bool IsValidExtensionId(const std::string& s) {
// Must be a 32-character string with lowercase letters between a and p,
// inclusive.
if (s.size() != 32u)
return false;
for (char c : s) {
if (c < 'a' || c > 'p')
return false;
}
return true;
}
bool IsWorkletToken(const blink::ExecutionContextToken& token) {
return token.Is<blink::AnimationWorkletToken>() ||
token.Is<blink::AudioWorkletToken>() ||
token.Is<blink::LayoutWorkletToken>() ||
token.Is<blink::PaintWorkletToken>();
}
bool IsWorkerToken(const blink::ExecutionContextToken& token) {
return token.Is<blink::DedicatedWorkerToken>() ||
token.Is<blink::ServiceWorkerToken>() ||
token.Is<blink::SharedWorkerToken>();
}
const execution_context::ExecutionContext* GetExecutionContext(
const blink::ExecutionContextToken& token,
Graph* graph) {
auto* registry =
execution_context::ExecutionContextRegistry::GetFromGraph(graph);
DCHECK(registry);
return registry->GetExecutionContextByToken(token);
}
V8ContextDescriptionStatus ValidateV8ContextDescription(
const mojom::V8ContextDescription& description) {
switch (description.world_type) {
case mojom::V8ContextWorldType::kMain: {
if (description.world_name)
return V8ContextDescriptionStatus::kUnexpectedWorldName;
if (!description.execution_context_token)
return V8ContextDescriptionStatus::kMissingExecutionContextToken;
if (!description.execution_context_token->Is<blink::LocalFrameToken>())
return V8ContextDescriptionStatus::kMissingLocalFrameToken;
} break;
case mojom::V8ContextWorldType::kWorkerOrWorklet: {
if (description.world_name)
return V8ContextDescriptionStatus::kUnexpectedWorldName;
if (!description.execution_context_token)
return V8ContextDescriptionStatus::kMissingExecutionContextToken;
if (description.execution_context_token->Is<blink::LocalFrameToken>())
return V8ContextDescriptionStatus::kUnexpectedLocalFrameToken;
} break;
case mojom::V8ContextWorldType::kShadowRealm: {
if (description.world_name)
return V8ContextDescriptionStatus::kUnexpectedWorldName;
if (!description.execution_context_token)
return V8ContextDescriptionStatus::kMissingExecutionContextToken;
if (!description.execution_context_token->Is<blink::ShadowRealmToken>())
return V8ContextDescriptionStatus::kMissingShadowRealmToken;
} break;
case mojom::V8ContextWorldType::kExtension: {
if (!description.world_name)
return V8ContextDescriptionStatus::kMissingWorldName;
if (!IsValidExtensionId(description.world_name.value()))
return V8ContextDescriptionStatus::kInvalidExtensionWorldName;
// Extensions can only inject into frames and workers, *not* worklets.
if (!description.execution_context_token)
return V8ContextDescriptionStatus::kMissingExecutionContextToken;
if (IsWorkletToken(description.execution_context_token.value()))
return V8ContextDescriptionStatus::kUnexpectedWorkletToken;
} break;
case mojom::V8ContextWorldType::kIsolated: {
// World names are optional in isolated worlds.
// Only frame and workers can have isolated worlds, *not* worklets.
if (!description.execution_context_token)
return V8ContextDescriptionStatus::kMissingExecutionContextToken;
if (IsWorkletToken(description.execution_context_token.value()))
return V8ContextDescriptionStatus::kUnexpectedWorkletToken;
} break;
case mojom::V8ContextWorldType::kInspector: {
if (description.world_name)
return V8ContextDescriptionStatus::kUnexpectedWorldName;
// Devtools can only inject into frames and workers, *not* worklets.
if (!description.execution_context_token)
return V8ContextDescriptionStatus::kMissingExecutionContextToken;
if (IsWorkletToken(description.execution_context_token.value()))
return V8ContextDescriptionStatus::kUnexpectedWorkletToken;
} break;
case mojom::V8ContextWorldType::kRegExp: {
// Regexp worlds have no additional data.
if (description.world_name)
return V8ContextDescriptionStatus::kUnexpectedWorldName;
if (description.execution_context_token)
return V8ContextDescriptionStatus::kUnexpectedExecutionContextToken;
} break;
}
return V8ContextDescriptionStatus::kValid;
}
std::optional<bool> ExpectIframeAttributionDataForV8ContextDescription(
const mojom::V8ContextDescription& description,
Graph* graph) {
switch (description.world_type) {
case mojom::V8ContextWorldType::kMain: {
// There's no guarantee that the actual ExecutionContext has yet been
// created from our POV as there's a race between V8Context creation
// notifications and node creations. But if it does exist, we sanity check
// that we should in fact be receiving iframe data for this frame.
if (auto* ec = GetExecutionContext(*description.execution_context_token,
graph)) {
return IsSynchronousIframeAttributionDataExpected(ec);
}
// Unable to be determined.
return std::nullopt;
}
case mojom::V8ContextWorldType::kWorkerOrWorklet:
case mojom::V8ContextWorldType::kShadowRealm:
case mojom::V8ContextWorldType::kExtension:
case mojom::V8ContextWorldType::kIsolated:
case mojom::V8ContextWorldType::kInspector:
case mojom::V8ContextWorldType::kRegExp:
break;
}
return false;
}
void MarkedObjectCount::Mark() {
DCHECK_LT(marked_count_, count_);
++marked_count_;
}
void MarkedObjectCount::Decrement(bool marked) {
DCHECK_LT(0u, count_);
if (marked) {
DCHECK_LT(0u, marked_count_);
--marked_count_;
} else {
DCHECK_LT(marked_count_, count_);
}
--count_;
}
} // namespace v8_memory
} // namespace performance_manager
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