content/browser/tcmalloc_internals_request_job.h

   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 #ifndef CONTENT_BROWSER_TCMALLOC_INTERNALS_REQUEST_JOB_H_
   6 #define CONTENT_BROWSER_TCMALLOC_INTERNALS_REQUEST_JOB_H_
   7
   8 #include <map>
   9 #include "base/basictypes.h"
  10 #include "base/memory/singleton.h"
  11 #include "base/process.h"
  12 #include "build/build_config.h"  // USE_TCMALLOC
  13 #include "content/public/common/process_type.h"
  14 #include "net/url_request/url_request_simple_job.h"
  15
  16 namespace content {
  17
  18 class AboutTcmallocOutputs {
  19  public:
  20   // Returns the singleton instance.
  21   static AboutTcmallocOutputs* GetInstance();
  22
  23   // Records the output for a specified header string.
  24   void SetOutput(const std::string& header, const std::string& output);
  25
  26   void DumpToHTMLTable(std::string* data);
  27
  28   // Callback for output returned from a child process.  Adds
  29   // the output for a canonical process-specific header string that
  30   // incorporates the pid.
  31   void OnStatsForChildProcess(base::ProcessId pid,
  32                               ProcessType process_type,
  33                               const std::string& output);
  34
  35  private:
  36   AboutTcmallocOutputs();
  37   ~AboutTcmallocOutputs();
  38
  39   // A map of header strings (e.g. "Browser", "Renderer PID 123")
  40   // to the tcmalloc output collected for each process.
  41   typedef std::map<std::string, std::string> AboutTcmallocOutputsType;
  42   AboutTcmallocOutputsType outputs_;
  43
  44   friend struct DefaultSingletonTraits<AboutTcmallocOutputs>;
  45
  46   DISALLOW_COPY_AND_ASSIGN(AboutTcmallocOutputs);
  47 };
  48
  49 class TcmallocInternalsRequestJob : public net::URLRequestSimpleJob {
  50  public:
  51   TcmallocInternalsRequestJob(net::URLRequest* request,
  52                               net::NetworkDelegate* network_delegate);
  53
  54   virtual int GetData(std::string* mime_type,
  55                       std::string* charset,
  56                       std::string* data,
  57                       const net::CompletionCallback& callback) const OVERRIDE;
  58
  59  protected:
  60   virtual ~TcmallocInternalsRequestJob() {}
  61
  62  private:
  63   DISALLOW_IMPLICIT_CONSTRUCTORS(TcmallocInternalsRequestJob);
  64 };
  65
  66 }  // namespace content
  67
  68 #endif  // CONTENT_BROWSER_TCMALLOC_INTERNALS_REQUEST_JOB_H_