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// Copyright (c) 2009 The Chromium 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 "chrome/browser/memory_details.h"
#include "app/l10n_util.h"
#include "base/file_version_info.h"
#include "base/process_util.h"
#include "base/string_util.h"
#include "chrome/browser/chrome_thread.h"
#include "chrome/browser/renderer_host/backing_store_manager.h"
#include "chrome/browser/renderer_host/render_process_host.h"
#include "chrome/browser/tab_contents/navigation_entry.h"
#include "chrome/browser/tab_contents/tab_contents.h"
#include "chrome/common/child_process_host.h"
#include "chrome/common/url_constants.h"
#include "grit/chromium_strings.h"
#if defined(OS_LINUX)
#include "chrome/browser/zygote_host_linux.h"
#include "chrome/browser/renderer_host/render_sandbox_host_linux.h"
#endif
// About threading:
//
// This operation will hit no fewer than 3 threads.
//
// The ChildProcessInfo::Iterator can only be accessed from the IO thread.
//
// The RenderProcessHostIterator can only be accessed from the UI thread.
//
// This operation can take 30-100ms to complete. We never want to have
// one task run for that long on the UI or IO threads. So, we run the
// expensive parts of this operation over on the file thread.
//
void MemoryDetails::StartFetch() {
DCHECK(!ChromeThread::CurrentlyOn(ChromeThread::IO));
DCHECK(!ChromeThread::CurrentlyOn(ChromeThread::FILE));
// In order to process this request, we need to use the plugin information.
// However, plugin process information is only available from the IO thread.
ChromeThread::PostTask(
ChromeThread::IO, FROM_HERE,
NewRunnableMethod(this, &MemoryDetails::CollectChildInfoOnIOThread));
}
void MemoryDetails::CollectChildInfoOnIOThread() {
DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO));
std::vector<ProcessMemoryInformation> child_info;
// Collect the list of child processes.
for (ChildProcessHost::Iterator iter; !iter.Done(); ++iter) {
ProcessMemoryInformation info;
info.pid = base::GetProcId(iter->handle());
if (!info.pid)
continue;
info.type = iter->type();
info.titles.push_back(iter->name());
child_info.push_back(info);
}
// Now go do expensive memory lookups from the file thread.
ChromeThread::PostTask(
ChromeThread::FILE, FROM_HERE,
NewRunnableMethod(this, &MemoryDetails::CollectProcessData, child_info));
}
void MemoryDetails::CollectChildInfoOnUIThread() {
DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
#if defined(OS_LINUX)
const pid_t zygote_pid = Singleton<ZygoteHost>()->pid();
const pid_t sandbox_helper_pid = Singleton<RenderSandboxHostLinux>()->pid();
#endif
ProcessData* const chrome_browser = ChromeBrowser();
// Get more information about the process.
for (size_t index = 0; index < chrome_browser->processes.size();
index++) {
// Check if it's a renderer, if so get the list of page titles in it and
// check if it's a diagnostics-related process. We skip all diagnostics
// pages (e.g. "about:xxx" URLs). Iterate the RenderProcessHosts to find
// the tab contents.
ProcessMemoryInformation& process =
chrome_browser->processes[index];
for (RenderProcessHost::iterator renderer_iter(
RenderProcessHost::AllHostsIterator()); !renderer_iter.IsAtEnd();
renderer_iter.Advance()) {
DCHECK(renderer_iter.GetCurrentValue());
if (process.pid !=
base::GetProcId(renderer_iter.GetCurrentValue()->GetHandle())) {
continue;
}
process.type = ChildProcessInfo::RENDER_PROCESS;
// The RenderProcessHost may host multiple TabContents. Any
// of them which contain diagnostics information make the whole
// process be considered a diagnostics process.
//
// NOTE: This is a bit dangerous. We know that for now, listeners
// are always RenderWidgetHosts. But in theory, they don't
// have to be.
RenderProcessHost::listeners_iterator iter(
renderer_iter.GetCurrentValue()->ListenersIterator());
for (; !iter.IsAtEnd(); iter.Advance()) {
const RenderWidgetHost* widget =
static_cast<const RenderWidgetHost*>(iter.GetCurrentValue());
DCHECK(widget);
if (!widget || !widget->IsRenderView())
continue;
const RenderViewHost* host = static_cast<const RenderViewHost*>(widget);
TabContents* contents = NULL;
if (host->delegate())
contents = host->delegate()->GetAsTabContents();
if (!contents)
continue;
std::wstring title = UTF16ToWideHack(contents->GetTitle());
if (!title.length())
title = L"Untitled";
process.titles.push_back(title);
// We need to check the pending entry as well as the virtual_url to
// see if it's an about:memory URL (we don't want to count these in the
// total memory usage of the browser).
//
// When we reach here, about:memory will be the pending entry since we
// haven't responded with any data such that it would be committed. If
// you have another about:memory tab open (which would be committed),
// we don't want to count it either, so we also check the last committed
// entry.
//
// Either the pending or last committed entries can be NULL.
const NavigationEntry* pending_entry =
contents->controller().pending_entry();
const NavigationEntry* last_committed_entry =
contents->controller().GetLastCommittedEntry();
if ((last_committed_entry &&
LowerCaseEqualsASCII(last_committed_entry->virtual_url().spec(),
chrome::kAboutMemoryURL)) ||
(pending_entry &&
LowerCaseEqualsASCII(pending_entry->virtual_url().spec(),
chrome::kAboutMemoryURL)))
process.is_diagnostics = true;
}
}
#if defined(OS_LINUX)
if (process.pid == zygote_pid) {
process.type = ChildProcessInfo::ZYGOTE_PROCESS;
} else if (process.pid == sandbox_helper_pid) {
process.type = ChildProcessInfo::SANDBOX_HELPER_PROCESS;
}
#endif
}
// Get rid of other Chrome processes that are from a different profile.
for (size_t index = 0; index < chrome_browser->processes.size();
index++) {
if (chrome_browser->processes[index].type ==
ChildProcessInfo::UNKNOWN_PROCESS) {
chrome_browser->processes.erase(
chrome_browser->processes.begin() + index);
index--;
}
}
UpdateHistograms();
OnDetailsAvailable();
}
void MemoryDetails::UpdateHistograms() {
// Reports a set of memory metrics to UMA.
// Memory is measured in KB.
const ProcessData& browser = *ChromeBrowser();
size_t aggregate_memory = 0;
int plugin_count = 0;
int worker_count = 0;
for (size_t index = 0; index < browser.processes.size(); index++) {
int sample = static_cast<int>(browser.processes[index].working_set.priv);
aggregate_memory += sample;
switch (browser.processes[index].type) {
case ChildProcessInfo::BROWSER_PROCESS:
UMA_HISTOGRAM_MEMORY_KB("Memory.Browser", sample);
break;
case ChildProcessInfo::RENDER_PROCESS:
UMA_HISTOGRAM_MEMORY_KB("Memory.Renderer", sample);
break;
case ChildProcessInfo::PLUGIN_PROCESS:
UMA_HISTOGRAM_MEMORY_KB("Memory.Plugin", sample);
plugin_count++;
break;
case ChildProcessInfo::WORKER_PROCESS:
UMA_HISTOGRAM_MEMORY_KB("Memory.Worker", sample);
worker_count++;
break;
case ChildProcessInfo::UTILITY_PROCESS:
UMA_HISTOGRAM_MEMORY_KB("Memory.Utility", sample);
break;
case ChildProcessInfo::ZYGOTE_PROCESS:
UMA_HISTOGRAM_MEMORY_KB("Memory.Zygote", sample);
break;
case ChildProcessInfo::SANDBOX_HELPER_PROCESS:
UMA_HISTOGRAM_MEMORY_KB("Memory.SandboxHelper", sample);
break;
case ChildProcessInfo::NACL_PROCESS:
UMA_HISTOGRAM_MEMORY_KB("Memory.NativeClient", sample);
break;
default:
NOTREACHED();
}
}
UMA_HISTOGRAM_MEMORY_KB("Memory.BackingStore",
BackingStoreManager::MemorySize() / 1024);
UMA_HISTOGRAM_COUNTS_100("Memory.ProcessCount",
static_cast<int>(browser.processes.size()));
UMA_HISTOGRAM_COUNTS_100("Memory.PluginProcessCount", plugin_count);
UMA_HISTOGRAM_COUNTS_100("Memory.WorkerProcessCount", worker_count);
// TODO(viettrungluu): Do we want separate counts for the other
// (platform-specific) process types?
int total_sample = static_cast<int>(aggregate_memory / 1000);
UMA_HISTOGRAM_MEMORY_MB("Memory.Total", total_sample);
}
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