tcmalloc stats

// Copyright (c) 2012 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 "content/browser/tcmalloc_internals_request_job.h" #include "base/allocator/allocator_extension.h" #include "content/common/child_process_messages.h" #include "content/public/browser/browser_child_process_host_iterator.h" #include "content/public/browser/browser_thread.h" #include "content/public/browser/render_process_host.h" #include "content/public/common/process_type.h" #include "net/base/net_errors.h" namespace content { // static AboutTcmallocOutputs* AboutTcmallocOutputs::GetInstance() { return Singleton::get(); } AboutTcmallocOutputs::AboutTcmallocOutputs() {} AboutTcmallocOutputs::~AboutTcmallocOutputs() {} void AboutTcmallocOutputs::OnStatsForChildProcess( base::ProcessId pid, int process_type, const std::string& output) { std::string header = GetProcessTypeNameInEnglish(process_type); base::StringAppendF(&header, " PID %d", static_cast(pid)); SetOutput(header, output); } void AboutTcmallocOutputs::SetOutput(const std::string& header, const std::string& output) { DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); outputs_[header] = output; } void AboutTcmallocOutputs::DumpToHTMLTable(std::string* data) { DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); data->append("\n"); for (AboutTcmallocOutputsType::const_iterator oit = outputs_.begin(); oit != outputs_.end(); oit++) { data->append("\n"); data->append("\n"); } data->append("

"); data->append(oit->first); data->append("

\n");
    data->append(oit->second);
    data->append("

\n"); outputs_.clear(); } TcmallocInternalsRequestJob::TcmallocInternalsRequestJob( net::URLRequest* request, net::NetworkDelegate* network_delegate) : net::URLRequestSimpleJob(request, network_delegate) { } #if defined(USE_TCMALLOC) void RequestTcmallocStatsFromChildRenderProcesses() { RenderProcessHost::iterator it(RenderProcessHost::AllHostsIterator()); while (!it.IsAtEnd()) { it.GetCurrentValue()->Send(new ChildProcessMsg_GetTcmallocStats); it.Advance(); } } void AboutTcmalloc(std::string* data) { data->append("\n\n\n"); data->append( ""); data->append("tcmalloc stats"); data->append(""); // Display any stats for which we sent off requests the last time. data->append("

Stats as of last page load;"); data->append("reload to get stats as of this page load.

\n"); data->append("\n"); AboutTcmallocOutputs::GetInstance()->DumpToHTMLTable(data); data->append("\n"); // Populate the collector with stats from the local browser process // and send off requests to all the renderer processes. char buffer[1024 * 32]; base::allocator::GetStats(buffer, sizeof(buffer)); std::string browser("Browser"); AboutTcmallocOutputs::GetInstance()->SetOutput(browser, buffer); for (BrowserChildProcessHostIterator iter; !iter.Done(); ++iter) { iter.Send(new ChildProcessMsg_GetTcmallocStats); } BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, base::Bind( &RequestTcmallocStatsFromChildRenderProcesses)); } #endif int TcmallocInternalsRequestJob::GetData( std::string* mime_type, std::string* charset, std::string* data, const net::CompletionCallback& callback) const { mime_type->assign("text/html"); charset->assign("UTF8"); data->clear(); #if defined(USE_TCMALLOC) AboutTcmalloc(data); #endif return net::OK; } } // namespace content