| Index: native_client_sdk/doc_generated/faq.html
|
| diff --git a/native_client_sdk/doc_generated/faq.html b/native_client_sdk/doc_generated/faq.html
|
| index 80835aa33d311f70fd3d504a7e2404a1f433a7fa..f2fafbbf1c689e4d9f81d6600c626ca2612d897f 100644
|
| --- a/native_client_sdk/doc_generated/faq.html
|
| +++ b/native_client_sdk/doc_generated/faq.html
|
| @@ -79,9 +79,7 @@ Client (NaCl) and Portable Native Client (PNaCl, pronounced
|
| <li>Scan through the <a class="reference internal" href="/native-client/sdk/release-notes.html"><em>Release Notes</em></a>.</li>
|
| <li>Search through or ask on the <a class="reference internal" href="/native-client/help.html"><em>Native Client Forums</em></a>.</li>
|
| </ul>
|
| -<section id="what-is-native-client-good-for">
|
| <h2 id="what-is-native-client-good-for">What is Native Client Good For?</h2>
|
| -<section id="why-did-google-build-native-client">
|
| <h3 id="why-did-google-build-native-client">Why did Google build Native Client?</h3>
|
| <ul class="small-gap">
|
| <li><strong>Performance:</strong> Native Client modules run nearly as fast as native
|
| @@ -125,12 +123,10 @@ gains support for new processors and fully uses their capabilities.</li>
|
| </ul>
|
| <p>For more details, refer to the <a class="reference internal" href="/native-client/nacl-and-pnacl.html"><em>history behind and comparison of
|
| NaCl and PNaCl</em></a>.</p>
|
| -</section><section id="when-should-i-use-portable-native-client-instead-of-native-client">
|
| <h3 id="when-should-i-use-portable-native-client-instead-of-native-client">When should I use Portable Native Client instead of Native Client?</h3>
|
| <p>See <a class="reference internal" href="/native-client/nacl-and-pnacl.html"><em>NaCl and PNaCl</em></a>. In short: PNaCl works on the Open
|
| Web platform delivered by Chrome whereas NaCl only works on the Chrome Web
|
| Store.</p>
|
| -</section><section id="when-should-i-use-portable-native-client-native-client">
|
| <h3 id="when-should-i-use-portable-native-client-native-client">When should I use Portable Native Client / Native Client?</h3>
|
| <p>The following are some typical use cases. For details, see the
|
| <a class="reference internal" href="/native-client/overview.html"><em>Technical Overview</em></a>.</p>
|
| @@ -149,7 +145,6 @@ system for a game).</li>
|
| </ul>
|
| <p>Portable Native Client and Native Client are versatile technologies which are
|
| used in many other contexts outside of Chrome.</p>
|
| -</section><section id="how-fast-does-code-run-in-portable-native-client">
|
| <h3 id="how-fast-does-code-run-in-portable-native-client">How fast does code run in Portable Native Client?</h3>
|
| <p>Fast! The SPEC2k benchmarks (C, C++ and floating-point benchmarks) give
|
| the following overhead for optimized PNaCl compared to regular optimized
|
| @@ -184,7 +179,6 @@ native code such as <a class="reference internal" href="/native-client/reference
|
| </ul>
|
| <p>If your code isn’t performing as close to native speed as you’d expect,
|
| <a class="reference internal" href="/native-client/help.html"><em>let us know</em></a>!</p>
|
| -</section><section id="why-use-portable-native-client-instead-of-technology-x">
|
| <h3 id="why-use-portable-native-client-instead-of-technology-x">Why use Portable Native Client instead of <em><technology X></em>?</h3>
|
| <p>Many other technologies can be compared to Portable Native Client:
|
| Flash, Java, Silverlight, ActiveX, .NET, asm.js, etc...</p>
|
| @@ -195,14 +189,11 @@ other technologies.</p>
|
| <p>Portable Native Client complement other technologies by giving web
|
| developers a new capability: the ability to run fast, secure native code
|
| from a web browser in an architecture-independent way.</p>
|
| -</section><section id="if-i-want-direct-access-to-the-os-should-i-use-native-client">
|
| <h3 id="if-i-want-direct-access-to-the-os-should-i-use-native-client">If I want direct access to the OS, should I use Native Client?</h3>
|
| <p>No—Native Client does not provide direct access to the OS or devices,
|
| or otherwise bypass the JavaScript security model. For more information,
|
| see later sections of this FAQ.</p>
|
| -</section></section><section id="development-environments-and-tools">
|
| <h2 id="development-environments-and-tools">Development Environments and Tools</h2>
|
| -<section id="what-development-environment-and-development-operating-system-do-you-recommend">
|
| <h3 id="what-development-environment-and-development-operating-system-do-you-recommend">What development environment and development operating system do you recommend?</h3>
|
| <p>You can develop on Windows, Mac, or Linux, and the resulting Native Client or
|
| Portable Native Client application will run inside the Google Chrome browser on
|
| @@ -212,7 +203,6 @@ and we’re working on self-hosting a full development environment on Portab
|
| Native Client.</p>
|
| <p>Any editor+shell combination should work as well as IDEs like Eclipse,
|
| Visual Studio with the <a class="reference internal" href="/native-client/devguide/devcycle/vs-addin.html"><em>Native Client Add-In</em></a> on Windows, or Xcode on Mac OSX.</p>
|
| -</section><section id="i-m-not-familiar-with-native-development-tools-can-i-still-use-the-native-client-sdk">
|
| <h3 id="i-m-not-familiar-with-native-development-tools-can-i-still-use-the-native-client-sdk">I’m not familiar with native development tools, can I still use the Native Client SDK?</h3>
|
| <p>You may find our <a class="reference internal" href="/native-client/devguide/tutorial/index.html"><em>Tutorial</em></a> and <a class="reference internal" href="/native-client/devguide/devcycle/building.html"><em>Building
|
| instructions</em></a> useful, and you can look at
|
| @@ -221,9 +211,7 @@ examples are built and run.</p>
|
| <p>You’ll need to learn how to use some tools (like GCC, LLVM, make, Eclipse,
|
| Visual Studio, or Xcode) before you can get very far with the SDK. Try seaching
|
| for an <a class="reference external" href="https://www.google.com/search?q=gcc+introduction">introduction to GCC</a>.</p>
|
| -</section></section><section id="openness-and-supported-architectures-and-languages">
|
| <h2 id="openness-and-supported-architectures-and-languages">Openness, and Supported Architectures and Languages</h2>
|
| -<section id="is-native-client-open-is-it-a-standard">
|
| <h3 id="is-native-client-open-is-it-a-standard">Is Native Client open? Is it a standard?</h3>
|
| <p>Native Client is completely open: the executable format is open and the
|
| <a class="reference external" href="https://code.google.com/p/nativeclient/">source code is open</a>. Right
|
| @@ -232,7 +220,6 @@ to consider Native Client for standardization.</p>
|
| <p>We consistenly try to document our design and implementation and hope to
|
| standardize Portable Native Client when it gains more traction. A good
|
| example is our <a class="reference internal" href="/native-client/reference/pnacl-bitcode-abi.html"><em>PNaCl bitcode reference manual</em></a>.</p>
|
| -</section><section id="what-are-the-supported-instruction-set-architectures">
|
| <h3 id="what-are-the-supported-instruction-set-architectures">What are the supported instruction set architectures?</h3>
|
| <p>Portable Native Client uses an architecture-independent format (the
|
| <code>.pexe</code>) which can currently be translated to execute on processors
|
| @@ -249,8 +236,7 @@ deem them better suited to a web store than to the open web.</p>
|
| portability to JavaScript and can adapt to new instruction set
|
| architectures without requiring recompilation. The web is better when
|
| it’s platform-independent, and we’d like it to stay that way.</p>
|
| -</section><section id="do-i-have-to-use-c-or-c-i-d-really-like-to-use-another-language">
|
| -<span id="other-languages"></span><h3 id="do-i-have-to-use-c-or-c-i-d-really-like-to-use-another-language"><span id="other-languages"></span>Do I have to use C or C++? I’d really like to use another language.</h3>
|
| +<h3 id="do-i-have-to-use-c-or-c-i-d-really-like-to-use-another-language"><span id="other-languages"></span>Do I have to use C or C++? I’d really like to use another language.</h3>
|
| <p>Right now only C and C++ are supported directly by the toolchain in the SDK. C#
|
| and other languages in the .NET family are supported via the <a class="reference external" href="https://github.com/elijahtaylor/mono">Mono port</a> for
|
| Native Client. Moreover, there are several ongoing projects to support
|
| @@ -260,7 +246,6 @@ as well as to compile more languages to LLVM’s intermediate representation
|
| transpile languages to C/C++ (source-to-source compilation).</p>
|
| <p>If you’re interested in getting other languages working, please contact the
|
| Native Client team by way of the <a class="reference external" href="https://groups.google.com/group/native-client-discuss">native-client-discuss</a> mailing list.</p>
|
| -</section><section id="do-you-only-support-chrome-what-about-other-browsers">
|
| <h3 id="do-you-only-support-chrome-what-about-other-browsers">Do you only support Chrome? What about other browsers?</h3>
|
| <p>We aim to support multiple browsers. However, a number of features that
|
| we consider requirements for a production-quality system that keeps the
|
| @@ -269,23 +254,19 @@ browser. Specific examples are an out-of-process plugin architecture and
|
| appropriate interfaces for integrated 3D graphics. We have worked
|
| closely with Chromium developers to deliver these features and we are
|
| eager to collaborate with developers from other browsers.</p>
|
| -</section><section id="what-s-the-difference-between-npapi-and-pepper">
|
| <h3 id="what-s-the-difference-between-npapi-and-pepper">What’s the difference between NPAPI and Pepper?</h3>
|
| <p><a class="reference internal" href="/native-client/pepper_stable/index.html"><em>Pepper</em></a> (also known as PPAPI) is a new API that
|
| lets Native Client modules communicate with the browser. Pepper supports
|
| various features that don’t have robust support in NPAPI, such as event
|
| handling, out-of-process plugins, and asynchronous interfaces. Native
|
| Client has transitioned from using NPAPI to using Pepper.</p>
|
| -</section><section id="is-npapi-part-of-the-native-client-sdk">
|
| <h3 id="is-npapi-part-of-the-native-client-sdk">Is NPAPI part of the Native Client SDK?</h3>
|
| <p>NPAPI is not supported by the Native Client SDK, and is <a class="reference external" href="http://blog.chromium.org/2013/09/saying-goodbye-to-our-old-friend-npapi.html">deprecated in Chrome</a>.</p>
|
| -</section><section id="does-native-client-support-simd-vector-instructions">
|
| <h3 id="does-native-client-support-simd-vector-instructions">Does Native Client support SIMD vector instructions?</h3>
|
| <p>Native Client currently supports SSE on x86 and NEON on ARM. Support for
|
| AVX on x86 is under way.</p>
|
| <p>Portable Native Client supports portable SIMD vectors, as detailed in
|
| <a class="reference internal" href="/native-client/reference/pnacl-c-cpp-language-support.html#portable-simd-vectors"><em>Portable SIMD Vectors</em></a>.</p>
|
| -</section><section id="can-i-use-native-client-for-3d-graphics">
|
| <h3 id="can-i-use-native-client-for-3d-graphics">Can I use Native Client for 3D graphics?</h3>
|
| <p>Yes. Native Client supports <a class="reference external" href="https://www.khronos.org/opengles/">OpenGL ES 2.0</a>.</p>
|
| <p>To alert the user regarding their hardware platform’s 3D feature set
|
| @@ -297,7 +278,6 @@ file</a>. This file is part of the GL wrapper supplied by the library
|
| extensions map to extensions available on other platforms, or differ very
|
| slightly (if they differ, the extension is usually CHROMIUM or ANGLE instead of
|
| EXT).</p>
|
| -</section><section id="does-native-client-support-concurrency-parallelism">
|
| <h3 id="does-native-client-support-concurrency-parallelism">Does Native Client support concurrency/parallelism?</h3>
|
| <p>Native Client and Portable Native Client both support pthreads,
|
| C11/C++11 threads, and low-level synchronization primitives (mutex,
|
| @@ -308,9 +288,7 @@ needing to copy them, which is often a limitation of shared-nothing
|
| systems. For more information see <a class="reference internal" href="/native-client/reference/pnacl-c-cpp-language-support.html#memory-model-and-atomics"><em>memory model and atomics</em></a> and <a class="reference internal" href="/native-client/reference/pnacl-c-cpp-language-support.html#language-support-threading"><em>threading</em></a>.</p>
|
| <p>Native Client doesn’t support HTML5 Web Workers directly but can
|
| interact with JavaScript code which does.</p>
|
| -</section></section><section id="coming-soon">
|
| <h2 id="coming-soon">Coming Soon</h2>
|
| -<section id="do-native-client-modules-have-access-to-external-devices">
|
| <h3 id="do-native-client-modules-have-access-to-external-devices">Do Native Client modules have access to external devices?</h3>
|
| <p>At this time Native Client modules do not have access to serial ports,
|
| camera devices, or microphones: Native Client can only use native
|
| @@ -321,9 +299,7 @@ efforts to make these resources available inside the browser.</p>
|
| capabilities of HTML5. The goal is for Pepper and JavaScript to evolve
|
| together and stay on par with each other with respect to features and
|
| capabilities.</p>
|
| -</section></section><section id="security-and-privacy">
|
| <h2 id="security-and-privacy">Security and Privacy</h2>
|
| -<section id="what-happens-to-my-data-when-i-use-native-client">
|
| <h3 id="what-happens-to-my-data-when-i-use-native-client">What happens to my data when I use Native Client?</h3>
|
| <p>Users can opt-in to sending usage statistics and crash information in
|
| Chrome, which includes usage statistics and crash information about
|
| @@ -333,7 +309,6 @@ does so anonymously without sending your application’s data or its debug
|
| information.</p>
|
| <p>For additional information about privacy and Chrome, see the <a class="reference external" href="https://www.google.com/chrome/intl/en/privacy.html">Google Chrome
|
| privacy policy</a> and the <a class="reference external" href="https://www.google.com/chrome/intl/en/eula_text.html">Google Chrome Terms of Service</a>.</p>
|
| -</section><section id="how-does-native-client-prevent-sandboxed-code-from-doing-bad-things">
|
| <h3 id="how-does-native-client-prevent-sandboxed-code-from-doing-bad-things">How does Native Client prevent sandboxed code from doing Bad Things?</h3>
|
| <p>Native Client’s sandbox works by validating the untrusted code (the
|
| compiled Native Client module) before running it. The validator checks
|
| @@ -362,7 +337,6 @@ output.</p>
|
| includes an outer sandbox that mediates system calls. For more details about
|
| both sandboxes, see <a class="reference external" href="http://research.google.com/pubs/pub34913.html">Native Client: A Sandbox for Portable, Untrusted x86 Code</a>
|
| (PDF).</p>
|
| -</section><section id="how-does-google-know-that-the-safety-measures-in-native-client-are-sufficient">
|
| <h3 id="how-does-google-know-that-the-safety-measures-in-native-client-are-sufficient">How does Google know that the safety measures in Native Client are sufficient?</h3>
|
| <p>Google has taken several steps to ensure that Native Client’s security works,
|
| including:</p>
|
| @@ -375,20 +349,16 @@ including:</p>
|
| <p>Google is committed to making Native Client safer than JavaScript and other
|
| popular browser technologies. If you have suggestions for security improvements,
|
| let the team know, by way of the <a class="reference external" href="https://groups.google.com/group/native-client-discuss">native-client-discuss</a> mailing list.</p>
|
| -</section></section><section id="development">
|
| <h2 id="development">Development</h2>
|
| -<section id="how-do-i-debug">
|
| <h3 id="how-do-i-debug">How do I debug?</h3>
|
| <p>Instructions on <a class="reference internal" href="/native-client/sdk/examples.html#debugging-the-sdk-examples"><em>debugging the SDK examples</em></a> using GDB are available. You can also
|
| debug Native Client modules with some <a class="reference internal" href="/native-client/devguide/devcycle/debugging.html"><em>alternative approaches</em></a>.</p>
|
| -</section><section id="how-do-i-build-x86-32-x86-64-or-arm-nexes">
|
| <h3 id="how-do-i-build-x86-32-x86-64-or-arm-nexes">How do I build x86-32, x86-64 or ARM <code>.nexes</code>?</h3>
|
| <p>By default, the applications in the <code>/examples</code> folder create
|
| architecture-independent <code>.pexe</code> for Portable Native Client. To
|
| generate a <code>.nexe</code> targetting one specific architecture using the
|
| Native Client or Portable Native Client toolchains, see the
|
| <a class="reference internal" href="/native-client/devguide/devcycle/building.html"><em>Building instructions</em></a>.</p>
|
| -</section><section id="how-can-my-web-application-determine-which-nexe-to-load">
|
| <h3 id="how-can-my-web-application-determine-which-nexe-to-load">How can my web application determine which <code>.nexe</code> to load?</h3>
|
| <p>Your application does not need to make the decision of loading an
|
| x86-32, x86-64 or ARM <code>.nexe</code> explicitly—the Native Client runtime
|
| @@ -399,12 +369,10 @@ examples for an illustration of how to do so). Your HTML file specifies
|
| the manifest filename in the <code>src</code> attribute of the <code><embed></code>
|
| tag. You can see the way the pieces fit together by examining the
|
| examples included in the SDK.</p>
|
| -</section><section id="is-it-possible-to-build-a-native-client-module-with-just-plain-c-not-c">
|
| <h3 id="is-it-possible-to-build-a-native-client-module-with-just-plain-c-not-c">Is it possible to build a Native Client module with just plain C (not C++)?</h3>
|
| <p>Yes. See the <code>"Hello, World!"</code> in C example in the SDK under
|
| <code>examples/tutorial/using_ppapi_simple/</code>, or the Game of Life example
|
| under <code>examples/demo/life/life.c</code>.</p>
|
| -</section><section id="what-unix-system-calls-can-i-make-through-native-client">
|
| <h3 id="what-unix-system-calls-can-i-make-through-native-client">What UNIX system calls can I make through Native Client?</h3>
|
| <p>Native Client doesn’t directly expose any system calls from the host OS
|
| because of the inherent security risks and because the resulting
|
| @@ -413,22 +381,18 @@ Native Client provides portable cross-OS abstractions wrapping or
|
| proxying OS functionality or emulating UNIX system calls. For example,
|
| Native Client provides an <code>mmap()</code> system call that behaves much like
|
| the standard UNIX <code>mmap()</code> system call.</p>
|
| -</section><section id="is-my-favorite-third-party-library-available-for-native-client">
|
| <h3 id="is-my-favorite-third-party-library-available-for-native-client">Is my favorite third-party library available for Native Client?</h3>
|
| <p>Google has ported several third-party libraries to Native Client; such libraries
|
| are available in the <a class="reference external" href="https://code.google.com/p/naclports">naclports</a> project. We encourage you to contribute
|
| libraries to naclports, and/or to host your own ported libraries, and to let the
|
| team know about it on <a class="reference external" href="https://groups.google.com/group/native-client-discuss">native-client-discuss</a> when you do.</p>
|
| -</section><section id="do-all-the-files-in-an-application-need-to-be-served-from-the-same-domain">
|
| <h3 id="do-all-the-files-in-an-application-need-to-be-served-from-the-same-domain">Do all the files in an application need to be served from the same domain?</h3>
|
| <p>The <code>.nmf</code>, and <code>.nexe</code> or <code>.pexe</code> files must either be served from the
|
| same origin as the embedding page or an origin that has been configured
|
| correctly using <a class="reference external" href="http://en.wikipedia.org/wiki/Cross-origin_resource_sharing">CORS</a>.</p>
|
| <p>For applications installed from the Chrome Web Store the Web Store manifest
|
| must include the correct, verified domain of the embedding page.</p>
|
| -</section></section><section id="portability">
|
| <h2 id="portability">Portability</h2>
|
| -<section id="do-i-have-to-do-anything-special-to-make-my-application-run-on-different-operating-systems">
|
| <h3 id="do-i-have-to-do-anything-special-to-make-my-application-run-on-different-operating-systems">Do I have to do anything special to make my application run on different operating systems?</h3>
|
| <p>No. Native Client and Portable Native Client applications run without
|
| modification on all supported operating systems.</p>
|
| @@ -441,7 +405,6 @@ make them available on the Chrome Web Store. See <a class="reference internal" h
|
| architectures</em></a> for details about which
|
| <code>.nexe</code> files will run on which architectures.</li>
|
| </ul>
|
| -</section><section id="how-easy-is-it-to-port-my-existing-native-code-to-native-client">
|
| <h3 id="how-easy-is-it-to-port-my-existing-native-code-to-native-client">How easy is it to port my existing native code to Native Client?</h3>
|
| <p>In most cases you won’t have to rewrite much, if any, code. The Native
|
| Client-specific tools, such as <code>pnacl-clang++</code> or <code>x86_64-nacl-g++</code>,
|
| @@ -467,9 +430,7 @@ the Native Client SDK includes a library called nacl_io which allows the
|
| application to interact with all these types of files via standard POSIX I/O
|
| functions (e.g. open/fopen/read/write/...). See <a class="reference internal" href="/native-client/devguide/coding/nacl_io.html"><em>Using NaCl I/O</em></a> for more details.</li>
|
| </ul>
|
| -</section></section><section id="troubleshooting">
|
| -<span id="faq-troubleshooting"></span><h2 id="troubleshooting"><span id="faq-troubleshooting"></span>Troubleshooting</h2>
|
| -<section id="my-pexe-isn-t-loading-help">
|
| +<h2 id="troubleshooting"><span id="faq-troubleshooting"></span>Troubleshooting</h2>
|
| <h3 id="my-pexe-isn-t-loading-help">My <code>.pexe</code> isn’t loading, help!</h3>
|
| <ul class="small-gap">
|
| <li>You must use Google Chrome version 31 or greater for Portable Native
|
| @@ -482,7 +443,6 @@ SDK versions had experimental support for PNaCl, now deprecated).</li>
|
| in JavaScript with <code>navigator.mimeTypes['application/x-pnacl'] !==
|
| undefined</code>. This is preferred over checking the Chrome version.</li>
|
| </ul>
|
| -</section><section id="my-nexe-files-never-finish-loading-what-gives">
|
| <h3 id="my-nexe-files-never-finish-loading-what-gives">My <code>.nexe</code> files never finish loading. What gives?</h3>
|
| <p>Here are ways to resolve some common problems that can prevent loading:</p>
|
| <ul class="small-gap">
|
| @@ -515,6 +475,6 @@ select a processor-specific <code>.nexe</code> goes away with Portable Native
|
| Client.</li>
|
| <li>If things still aren’t working, <a class="reference internal" href="/native-client/help.html"><em>ask for help</em></a>!</li>
|
| </ul>
|
| -</section></section></section>
|
| +</section>
|
|
|
| {{/partials.standard_nacl_article}}
|
|
|