The Tor Browser: ipc/chromium/src/chrome/common/child_process

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 // Copyright (c) 2009 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.

     5 #include "chrome/common/child_process_info.h"

     7 #include <limits>

     9 #include "base/logging.h"

    10 #include "base/process_util.h"

    11 #include "base/rand_util.h"

    12 #include "base/string_util.h"

    14 std::wstring ChildProcessInfo::GetTypeNameInEnglish(

    15     ChildProcessInfo::ProcessType type) {

    16   switch (type) {

    17     case BROWSER_PROCESS:

    18       return L"Browser";

    19     case RENDER_PROCESS:

    20       return L"Tab";

    21     case PLUGIN_PROCESS:

    22       return L"Plug-in";

    23     case WORKER_PROCESS:

    24       return L"Web Worker";

    25     case UNKNOWN_PROCESS:

    26       default:

    27       DCHECK(false) << "Unknown child process type!";

    28       return L"Unknown";

    29     }

    30 }

    32 std::wstring ChildProcessInfo::GetLocalizedTitle() const {

    33   return name_;

    34 }

    36 ChildProcessInfo::ChildProcessInfo(ProcessType type) {

    37   // This constructor is only used by objects which derive from this class,

    38   // which means *this* is a real object that refers to a child process, and not

    39   // just a simple object that contains information about it.  So add it to our

    40   // list of running processes.

    41   type_ = type;

    42   pid_ = -1;

    43 }

    46 ChildProcessInfo::~ChildProcessInfo() {

    47 }

    49 std::wstring ChildProcessInfo::GenerateRandomChannelID(void* instance) {

    50   // Note: the string must start with the current process id, this is how

    51   // child processes determine the pid of the parent.

    52   // Build the channel ID.  This is composed of a unique identifier for the

    53   // parent browser process, an identifier for the child instance, and a random

    54   // component. We use a random component so that a hacked child process can't

    55   // cause denial of service by causing future named pipe creation to fail.

    56   return StringPrintf(L"%d.%x.%d",

    57                       base::GetCurrentProcId(), instance,

    58                       base::RandInt(0, std::numeric_limits<int>::max()));

    59 }

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