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// Copyright 2015 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/crash/content/browser/child_exit_observer_android.h"
#include <unistd.h>
#include "base/check_op.h"
#include "base/containers/contains.h"
#include "base/functional/bind.h"
#include "components/crash/content/browser/crash_memory_metrics_collector_android.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/child_process_data.h"
#include "content/public/browser/child_process_termination_info.h"
using content::BrowserThread;
namespace crash_reporter {
namespace {
void PopulateTerminationInfo(
const content::ChildProcessTerminationInfo& content_info,
ChildExitObserver::TerminationInfo* info) {
info->binding_state = content_info.binding_state;
info->threw_exception_during_init = content_info.threw_exception_during_init;
info->was_killed_intentionally_by_browser =
content_info.was_killed_intentionally_by_browser;
info->renderer_has_visible_clients =
content_info.renderer_has_visible_clients;
info->renderer_was_subframe = content_info.renderer_was_subframe;
info->is_spare_renderer = content_info.is_spare_renderer;
info->has_spare_renderer = content_info.has_spare_renderer;
}
} // namespace
ChildExitObserver::TerminationInfo::TerminationInfo() = default;
ChildExitObserver::TerminationInfo::TerminationInfo(
const TerminationInfo& other) = default;
ChildExitObserver::TerminationInfo& ChildExitObserver::TerminationInfo::
operator=(const TerminationInfo& other) = default;
ChildExitObserver::ChildExitObserver() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
BrowserChildProcessObserver::Add(this);
scoped_crash_handler_host_observation_.Observe(
crashpad::CrashHandlerHost::Get());
}
ChildExitObserver::~ChildExitObserver() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
BrowserChildProcessObserver::Remove(this);
}
void ChildExitObserver::RegisterClient(std::unique_ptr<Client> client) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
base::AutoLock auto_lock(registered_clients_lock_);
registered_clients_.push_back(std::move(client));
}
void ChildExitObserver::ChildReceivedCrashSignal(base::ProcessId pid,
int signo) {
base::AutoLock lock(crash_signals_lock_);
bool result =
child_pid_to_crash_signal_.insert(std::make_pair(pid, signo)).second;
DCHECK(result);
}
void ChildExitObserver::OnRenderProcessHostCreated(
content::RenderProcessHost* host) {
// The child process pid isn't available when process is gone, keep a mapping
// between process_host_id and pid, so we can find it later.
process_host_id_to_pid_[host->GetDeprecatedID()] =
host->GetProcess().Handle();
if (!render_process_host_observation_.IsObservingSource(host)) {
render_process_host_observation_.AddObservation(host);
}
}
void ChildExitObserver::OnChildExit(TerminationInfo* info) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
{
base::AutoLock lock(crash_signals_lock_);
auto pid_and_signal = child_pid_to_crash_signal_.find(info->pid);
if (pid_and_signal != child_pid_to_crash_signal_.end()) {
info->crash_signo = pid_and_signal->second;
child_pid_to_crash_signal_.erase(pid_and_signal);
}
}
std::vector<Client*> registered_clients_copy;
{
base::AutoLock auto_lock(registered_clients_lock_);
for (auto& client : registered_clients_)
registered_clients_copy.push_back(client.get());
}
for (auto* client : registered_clients_copy) {
client->OnChildExit(*info);
}
}
void ChildExitObserver::BrowserChildProcessHostDisconnected(
const content::ChildProcessData& data) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
TerminationInfo info;
auto it = browser_child_process_info_.find(data.id);
if (it != browser_child_process_info_.end()) {
info = it->second;
browser_child_process_info_.erase(it);
} else {
info.process_host_id = data.id;
if (data.GetProcess().IsValid())
info.pid = data.GetProcess().Pid();
info.process_type = static_cast<content::ProcessType>(data.process_type);
info.app_state = base::android::ApplicationStatusListener::GetState();
info.normal_termination = true;
}
OnChildExit(&info);
}
void ChildExitObserver::BrowserChildProcessKilled(
const content::ChildProcessData& data,
const content::ChildProcessTerminationInfo& content_info) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
DCHECK(!base::Contains(browser_child_process_info_, data.id));
TerminationInfo info;
info.process_host_id = data.id;
info.pid = data.GetProcess().Pid();
info.process_type = static_cast<content::ProcessType>(data.process_type);
info.app_state = base::android::ApplicationStatusListener::GetState();
info.normal_termination = content_info.clean_exit;
PopulateTerminationInfo(content_info, &info);
browser_child_process_info_.emplace(data.id, info);
// Subsequent BrowserChildProcessHostDisconnected will call OnChildExit.
}
void ChildExitObserver::RenderProcessExited(
content::RenderProcessHost* host,
const content::ChildProcessTerminationInfo& info) {
ProcessRenderProcessHostLifetimeEndEvent(host, &info);
}
void ChildExitObserver::RenderProcessHostDestroyed(
content::RenderProcessHost* host) {
ProcessRenderProcessHostLifetimeEndEvent(host, nullptr);
render_process_host_observation_.RemoveObservation(host);
}
void ChildExitObserver::ProcessRenderProcessHostLifetimeEndEvent(
content::RenderProcessHost* rph,
const content::ChildProcessTerminationInfo* content_info) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
TerminationInfo info;
info.process_host_id = rph->GetDeprecatedID();
info.pid = rph->GetProcess().Handle();
info.process_type = content::PROCESS_TYPE_RENDERER;
info.app_state = base::android::APPLICATION_STATE_UNKNOWN;
info.renderer_has_visible_clients = rph->VisibleClientCount() > 0;
info.renderer_was_subframe = rph->GetFrameDepth() > 0u;
CrashMemoryMetricsCollector* collector =
CrashMemoryMetricsCollector::GetFromRenderProcessHost(rph);
// CrashMemoryMetircsCollector is created in chrome_content_browser_client,
// and does not exist in non-chrome platforms such as android webview /
// chromecast.
if (collector) {
// SharedMemory creation / Map() might fail.
info.blink_oom_metrics = collector->MemoryMetrics();
}
if (content_info) {
// We do not care about android fast shutdowns as it is a known case where
// the renderer is intentionally killed when we are done with it.
info.normal_termination = rph->FastShutdownStarted();
info.renderer_shutdown_requested = rph->ShutdownRequested();
info.app_state = base::android::ApplicationStatusListener::GetState();
PopulateTerminationInfo(*content_info, &info);
} else {
// No |content_info| is provided when the renderer process is cleanly
// shutdown.
info.normal_termination = true;
info.renderer_shutdown_requested = rph->ShutdownRequested();
}
const auto& iter = process_host_id_to_pid_.find(rph->GetDeprecatedID());
if (iter == process_host_id_to_pid_.end()) {
return;
}
if (info.pid == base::kNullProcessHandle) {
info.pid = iter->second;
}
process_host_id_to_pid_.erase(iter);
OnChildExit(&info);
}
} // namespace crash_reporter
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