The Tor Browser: xpcom/glue/AppData.cpp@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include "mozilla/AppData.h"

     7 #include "nsXULAppAPI.h"

     8 #include "nsINIParser.h"

     9 #include "nsIFile.h"

    10 #include "nsCRTGlue.h"

    11 #include "nsAutoPtr.h"

    13 namespace mozilla {

    15 void

    16 SetAllocatedString(const char *&str, const char *newvalue)

    17 {

    18   NS_Free(const_cast<char*>(str));

    19   if (newvalue) {

    20     str = NS_strdup(newvalue);

    21   }

    22   else {

    23     str = nullptr;

    24   }

    25 }

    27 void

    28 SetAllocatedString(const char *&str, const nsACString &newvalue)

    29 {

    30   NS_Free(const_cast<char*>(str));

    31   if (newvalue.IsEmpty()) {

    32     str = nullptr;

    33   }

    34   else {

    35     str = ToNewCString(newvalue);

    36   }

    37 }

    39 ScopedAppData::ScopedAppData(const nsXREAppData* aAppData)

    40 {

    41   Zero();

    43   this->size = aAppData->size;

    45   SetAllocatedString(this->vendor, aAppData->vendor);

    46   SetAllocatedString(this->name, aAppData->name);

    47   SetAllocatedString(this->version, aAppData->version);

    48   SetAllocatedString(this->buildID, aAppData->buildID);

    49   SetAllocatedString(this->ID, aAppData->ID);

    50   SetAllocatedString(this->copyright, aAppData->copyright);

    51   SetAllocatedString(this->profile, aAppData->profile);

    52   SetStrongPtr(this->directory, aAppData->directory);

    53   this->flags = aAppData->flags;

    55   if (aAppData->size > offsetof(nsXREAppData, xreDirectory)) {

    56     SetStrongPtr(this->xreDirectory, aAppData->xreDirectory);

    57     SetAllocatedString(this->minVersion, aAppData->minVersion);

    58     SetAllocatedString(this->maxVersion, aAppData->maxVersion);

    59   }

    61   if (aAppData->size > offsetof(nsXREAppData, crashReporterURL)) {

    62     SetAllocatedString(this->crashReporterURL, aAppData->crashReporterURL);

    63   }

    65   if (aAppData->size > offsetof(nsXREAppData, UAName)) {

    66     SetAllocatedString(this->UAName, aAppData->UAName);

    67   }

    68 }

    70 ScopedAppData::~ScopedAppData()

    71 {

    72   SetAllocatedString(this->vendor, nullptr);

    73   SetAllocatedString(this->name, nullptr);

    74   SetAllocatedString(this->version, nullptr);

    75   SetAllocatedString(this->buildID, nullptr);

    76   SetAllocatedString(this->ID, nullptr);

    77   SetAllocatedString(this->copyright, nullptr);

    78   SetAllocatedString(this->profile, nullptr);

    80   NS_IF_RELEASE(this->directory);

    82   SetStrongPtr(this->xreDirectory, (nsIFile*) nullptr);

    83   SetAllocatedString(this->minVersion, nullptr);

    84   SetAllocatedString(this->maxVersion, nullptr);

    86   SetAllocatedString(this->crashReporterURL, nullptr);

    87   SetAllocatedString(this->UAName, nullptr);

    88 }

    90 } // namespace mozilla

The Tor Browser / file revision

xpcom/glue/AppData.cpp@97036ab72558

xpcom/glue/AppData.cpp