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https://bitbucket.org/chromiumembedded/cef
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07bf5dbacc
Change the default stack size to 8 MiB for 64-bit and 0.5 MiB for 32-bit. CEF's main thread needs at least a 1.5 MiB stack size in order to avoid stack overflow crashes. However, if this is set in the PE file then other threads get this size as well, leading to address-space exhaustion in 32-bit CEF. A new CefRunWinMainWithPreferredStackSize function uses fibers to switch the main thread to a 4 MiB stack (roughly the same effective size as the 64-bit build's 8 MiB stack) before running any other code. This change additionally moves the existing Windows-only functions CefSetOSModalLoop and CefEnableHighDPISupport from cef_app.h to cef_win.h.
106 lines
3.7 KiB
C++
106 lines
3.7 KiB
C++
// Copyright (c) 2013 The Chromium Embedded Framework Authors. All rights
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// reserved. Use of this source code is governed by a BSD-style license that
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// can be found in the LICENSE file.
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#include <windows.h>
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#include "include/cef_command_line.h"
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#include "include/cef_sandbox_win.h"
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#include "tests/cefsimple/simple_app.h"
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// When generating projects with CMake the CEF_USE_SANDBOX value will be defined
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// automatically if using the required compiler version. Pass -DUSE_SANDBOX=OFF
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// to the CMake command-line to disable use of the sandbox.
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// Uncomment this line to manually enable sandbox support.
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// #define CEF_USE_SANDBOX 1
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#if defined(CEF_USE_SANDBOX)
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// The cef_sandbox.lib static library may not link successfully with all VS
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// versions.
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#pragma comment(lib, "cef_sandbox.lib")
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#endif
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// Entry point function for all processes.
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int APIENTRY wWinMain(HINSTANCE hInstance,
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HINSTANCE hPrevInstance,
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LPTSTR lpCmdLine,
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int nCmdShow) {
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UNREFERENCED_PARAMETER(hPrevInstance);
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UNREFERENCED_PARAMETER(lpCmdLine);
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int exit_code;
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#if defined(ARCH_CPU_32_BITS)
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// Run the main thread on 32-bit Windows using a fiber with the preferred 4MiB
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// stack size. This function must be called at the top of the executable entry
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// point function (`main()` or `wWinMain()`). It is used in combination with
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// the initial stack size of 0.5MiB configured via the `/STACK:0x80000` linker
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// flag on executable targets. This saves significant memory on threads (like
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// those in the Windows thread pool, and others) whose stack size can only be
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// controlled via the linker flag.
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exit_code = CefRunWinMainWithPreferredStackSize(wWinMain, hInstance,
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lpCmdLine, nCmdShow);
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if (exit_code >= 0) {
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// The fiber has completed so return here.
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return exit_code;
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}
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#endif
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// Enable High-DPI support on Windows 7 or newer.
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CefEnableHighDPISupport();
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void* sandbox_info = nullptr;
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#if defined(CEF_USE_SANDBOX)
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// Manage the life span of the sandbox information object. This is necessary
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// for sandbox support on Windows. See cef_sandbox_win.h for complete details.
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CefScopedSandboxInfo scoped_sandbox;
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sandbox_info = scoped_sandbox.sandbox_info();
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#endif
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// Provide CEF with command-line arguments.
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CefMainArgs main_args(hInstance);
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// CEF applications have multiple sub-processes (render, GPU, etc) that share
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// the same executable. This function checks the command-line and, if this is
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// a sub-process, executes the appropriate logic.
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exit_code = CefExecuteProcess(main_args, nullptr, sandbox_info);
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if (exit_code >= 0) {
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// The sub-process has completed so return here.
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return exit_code;
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}
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// Parse command-line arguments for use in this method.
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CefRefPtr<CefCommandLine> command_line = CefCommandLine::CreateCommandLine();
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command_line->InitFromString(::GetCommandLineW());
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// Specify CEF global settings here.
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CefSettings settings;
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if (command_line->HasSwitch("enable-chrome-runtime")) {
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// Enable experimental Chrome runtime. See issue #2969 for details.
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settings.chrome_runtime = true;
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}
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#if !defined(CEF_USE_SANDBOX)
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settings.no_sandbox = true;
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#endif
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// SimpleApp implements application-level callbacks for the browser process.
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// It will create the first browser instance in OnContextInitialized() after
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// CEF has initialized.
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CefRefPtr<SimpleApp> app(new SimpleApp);
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// Initialize CEF.
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CefInitialize(main_args, settings, app.get(), sandbox_info);
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// Run the CEF message loop. This will block until CefQuitMessageLoop() is
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// called.
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CefRunMessageLoop();
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// Shut down CEF.
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CefShutdown();
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return 0;
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}
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