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// Copyright 2023 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/public/resource_attribution/process_context.h"
#include <optional>
#include <utility>
#include <variant>
#include "base/check.h"
#include "base/functional/overloaded.h"
#include "base/memory/weak_ptr.h"
#include "base/strings/strcat.h"
#include "base/strings/string_number_conversions.h"
#include "components/performance_manager/graph/process_node_impl.h"
#include "components/performance_manager/public/browser_child_process_host_id.h"
#include "components/performance_manager/public/graph/graph.h"
#include "components/performance_manager/public/performance_manager.h"
#include "components/performance_manager/public/render_process_host_id.h"
#include "components/performance_manager/resource_attribution/performance_manager_aliases.h"
#include "content/public/browser/browser_child_process_host.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/child_process_data.h"
#include "content/public/browser/render_process_host.h"
namespace resource_attribution {
ProcessContext::ProcessContext(AnyProcessHostId id,
base::WeakPtr<ProcessNode> weak_node)
: id_(id), weak_node_(weak_node) {}
ProcessContext::~ProcessContext() = default;
ProcessContext::ProcessContext(const ProcessContext& other) = default;
ProcessContext& ProcessContext::operator=(const ProcessContext& other) =
default;
ProcessContext::ProcessContext(ProcessContext&& other) = default;
ProcessContext& ProcessContext::operator=(ProcessContext&& other) = default;
// static
std::optional<ProcessContext> ProcessContext::FromBrowserProcess() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
base::WeakPtr<ProcessNode> process_node =
PerformanceManager::GetProcessNodeForBrowserProcess();
if (!process_node.MaybeValid()) {
return std::nullopt;
}
return ProcessContext(BrowserProcessTag{}, std::move(process_node));
}
// static
std::optional<ProcessContext> ProcessContext::FromRenderProcessHost(
content::RenderProcessHost* host) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
CHECK(host);
RenderProcessHostId id(host->GetID());
CHECK(!id.is_null());
base::WeakPtr<ProcessNode> process_node =
PerformanceManager::GetProcessNodeForRenderProcessHost(host);
if (!process_node.MaybeValid()) {
return std::nullopt;
}
return ProcessContext(std::move(id), std::move(process_node));
}
// static
std::optional<ProcessContext> ProcessContext::FromBrowserChildProcessHost(
content::BrowserChildProcessHost* host) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
CHECK(host);
BrowserChildProcessHostId id(host->GetData().id);
CHECK(!id.is_null());
base::WeakPtr<ProcessNode> process_node =
PerformanceManager::GetProcessNodeForBrowserChildProcessHost(host);
if (!process_node.MaybeValid()) {
return std::nullopt;
}
return ProcessContext(std::move(id), std::move(process_node));
}
bool ProcessContext::IsBrowserProcessContext() const {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
return std::holds_alternative<BrowserProcessTag>(id_);
}
bool ProcessContext::IsRenderProcessContext() const {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
return std::holds_alternative<RenderProcessHostId>(id_);
}
bool ProcessContext::IsBrowserChildProcessContext() const {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
return std::holds_alternative<BrowserChildProcessHostId>(id_);
}
content::RenderProcessHost* ProcessContext::GetRenderProcessHost() const {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
const auto* rph_id = std::get_if<RenderProcessHostId>(&id_);
return rph_id ? content::RenderProcessHost::FromID(rph_id->GetUnsafeValue())
: nullptr;
}
RenderProcessHostId ProcessContext::GetRenderProcessHostId() const {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
const auto* rph_id = std::get_if<RenderProcessHostId>(&id_);
return rph_id ? *rph_id : RenderProcessHostId();
}
content::BrowserChildProcessHost* ProcessContext::GetBrowserChildProcessHost()
const {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
const auto* bcph_id = std::get_if<BrowserChildProcessHostId>(&id_);
return bcph_id ? content::BrowserChildProcessHost::FromID(
bcph_id->GetUnsafeValue())
: nullptr;
}
BrowserChildProcessHostId ProcessContext::GetBrowserChildProcessHostId() const {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
const auto* bcph_id = std::get_if<BrowserChildProcessHostId>(&id_);
return bcph_id ? *bcph_id : BrowserChildProcessHostId();
}
base::WeakPtr<ProcessNode> ProcessContext::GetWeakProcessNode() const {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
return weak_node_;
}
// static
ProcessContext ProcessContext::FromProcessNode(const ProcessNode* node) {
CHECK(node);
DCHECK_ON_GRAPH_SEQUENCE(node->GetGraph());
auto* node_impl = ProcessNodeImpl::FromNode(node);
AnyProcessHostId id;
switch (node_impl->GetProcessType()) {
case content::PROCESS_TYPE_BROWSER:
id = BrowserProcessTag{};
break;
case content::PROCESS_TYPE_RENDERER:
id = node_impl->GetRenderProcessHostId();
CHECK(!std::get<RenderProcessHostId>(id).is_null());
break;
default:
id = node_impl->GetBrowserChildProcessHostProxy()
.browser_child_process_host_id();
CHECK(!std::get<BrowserChildProcessHostId>(id).is_null());
break;
}
return ProcessContext(std::move(id), node_impl->GetWeakPtr());
}
// static
std::optional<ProcessContext> ProcessContext::FromWeakProcessNode(
base::WeakPtr<ProcessNode> node) {
if (!node) {
return std::nullopt;
}
return FromProcessNode(node.get());
}
ProcessNode* ProcessContext::GetProcessNode() const {
if (weak_node_) {
// `weak_node` will check anyway if dereferenced from the wrong sequence,
// but let's be explicit.
DCHECK_ON_GRAPH_SEQUENCE(weak_node_->GetGraph());
return weak_node_.get();
}
return nullptr;
}
std::string ProcessContext::ToString() const {
return std::visit(
base::Overloaded{
[](const BrowserProcessTag&) -> std::string {
return "ProcessContext:Browser";
},
[](const RenderProcessHostId& id) -> std::string {
return base::StrCat({"ProcessContext:Renderer:",
base::NumberToString(id.GetUnsafeValue())});
},
[](const BrowserChildProcessHostId& id) -> std::string {
return base::StrCat({"ProcessContext:BrowserChild:",
base::NumberToString(id.GetUnsafeValue())});
},
},
id_);
}
} // namespace resource_attribution
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