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