content/browser/tcmalloc_internals_request_job.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/tcmalloc_internals_request_job.h"
   6
   7 #include "base/allocator/allocator_extension.h"
   8 #include "content/common/child_process_messages.h"
   9 #include "content/public/browser/browser_child_process_host_iterator.h"
  10 #include "content/public/browser/browser_thread.h"
  11 #include "content/public/browser/render_process_host.h"
  12 #include "content/public/common/process_type.h"
  13 #include "net/base/net_errors.h"
  14
  15 namespace content {
  16
  17 // static
  18 AboutTcmallocOutputs* AboutTcmallocOutputs::GetInstance() {
  19   return base::Singleton<AboutTcmallocOutputs>::get();
  20 }
  21
  22 AboutTcmallocOutputs::AboutTcmallocOutputs() {}
  23
  24 AboutTcmallocOutputs::~AboutTcmallocOutputs() {}
  25
  26 void AboutTcmallocOutputs::OnStatsForChildProcess(
  27     base::ProcessId pid, int process_type,
  28     const std::string& output) {
  29   std::string header = GetProcessTypeNameInEnglish(process_type);
  30   base::StringAppendF(&header, " PID %d", static_cast<int>(pid));
  31   SetOutput(header, output);
  32 }
  33
  34 void AboutTcmallocOutputs::SetOutput(const std::string& header,
  35                                      const std::string& output) {
  36   DCHECK_CURRENTLY_ON(BrowserThread::IO);
  37
  38   outputs_[header] = output;
  39 }
  40
  41 void AboutTcmallocOutputs::DumpToHTMLTable(std::string* data) {
  42   DCHECK_CURRENTLY_ON(BrowserThread::IO);
  43
  44   data->append("<table width=\"100%\">\n");
  45   for (AboutTcmallocOutputsType::const_iterator oit = outputs_.begin();
  46        oit != outputs_.end();
  47        oit++) {
  48     data->append("<tr><td bgcolor=\"yellow\">");
  49     data->append(oit->first);
  50     data->append("</td></tr>\n");
  51     data->append("<tr><td><pre>\n");
  52     data->append(oit->second);
  53     data->append("</pre></td></tr>\n");
  54   }
  55   data->append("</table>\n");
  56   outputs_.clear();
  57 }
  58
  59 TcmallocInternalsRequestJob::TcmallocInternalsRequestJob(
  60     net::URLRequest* request, net::NetworkDelegate* network_delegate)
  61     : net::URLRequestSimpleJob(request, network_delegate) {
  62 }
  63
  64 #if defined(USE_TCMALLOC)
  65 void RequestTcmallocStatsFromChildRenderProcesses() {
  66   RenderProcessHost::iterator it(RenderProcessHost::AllHostsIterator());
  67   while (!it.IsAtEnd()) {
  68     it.GetCurrentValue()->Send(new ChildProcessMsg_GetTcmallocStats);
  69     it.Advance();
  70   }
  71 }
  72
  73 void AboutTcmalloc(std::string* data) {
  74   data->append("<!DOCTYPE html>\n<html>\n<head>\n");
  75   data->append(
  76       "<meta http-equiv=\"Content-Security-Policy\" "
  77       "content=\"object-src 'none'; script-src 'none'\">");
  78   data->append("<title>tcmalloc stats</title>");
  79   data->append("</head><body>");
  80
  81   // Display any stats for which we sent off requests the last time.
  82   data->append("<p>Stats as of last page load;");
  83   data->append("reload to get stats as of this page load.</p>\n");
  84   data->append("<table width=\"100%\">\n");
  85
  86   AboutTcmallocOutputs::GetInstance()->DumpToHTMLTable(data);
  87
  88   data->append("</body></html>\n");
  89
  90   // Populate the collector with stats from the local browser process
  91   // and send off requests to all the renderer processes.
  92   char buffer[1024 * 32];
  93   base::allocator::GetStats(buffer, sizeof(buffer));
  94   std::string browser("Browser");
  95   AboutTcmallocOutputs::GetInstance()->SetOutput(browser, buffer);
  96
  97   for (BrowserChildProcessHostIterator iter; !iter.Done(); ++iter) {
  98     iter.Send(new ChildProcessMsg_GetTcmallocStats);
  99   }
 100
 101   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, base::Bind(
 102       &RequestTcmallocStatsFromChildRenderProcesses));
 103 }
 104 #endif
 105
 106 int TcmallocInternalsRequestJob::GetData(
 107     std::string* mime_type,
 108     std::string* charset,
 109     std::string* data,
 110     const net::CompletionCallback& callback) const {
 111   mime_type->assign("text/html");
 112   charset->assign("UTF8");
 113
 114   data->clear();
 115 #if defined(USE_TCMALLOC)
 116   AboutTcmalloc(data);
 117 #endif
 118   return net::OK;
 119 }
 120
 121 } // namespace content