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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.
185 lines
7.6 KiB
C++
185 lines
7.6 KiB
C++
// Copyright (c) 2008 Marshall A. Greenblatt. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the name Chromium Embedded
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// Framework nor the names of its contributors may be used to endorse
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// or promote products derived from this software without specific prior
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// written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef CEF_INCLUDE_INTERNAL_CEF_WIN_H_
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#define CEF_INCLUDE_INTERNAL_CEF_WIN_H_
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#pragma once
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#include "include/internal/cef_app_win.h"
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#include "include/internal/cef_types_win.h"
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#include "include/internal/cef_types_wrappers.h"
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// Handle types.
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#define CefCursorHandle cef_cursor_handle_t
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#define CefEventHandle cef_event_handle_t
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#define CefWindowHandle cef_window_handle_t
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///
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/// Class representing CefExecuteProcess arguments.
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///
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class CefMainArgs : public cef_main_args_t {
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public:
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CefMainArgs() : cef_main_args_t{} {}
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CefMainArgs(const cef_main_args_t& r) : cef_main_args_t(r) {}
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explicit CefMainArgs(HINSTANCE hInstance) : cef_main_args_t{hInstance} {}
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};
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struct CefWindowInfoTraits {
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typedef cef_window_info_t struct_type;
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static inline void init(struct_type* s) {}
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static inline void clear(struct_type* s) {
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cef_string_clear(&s->window_name);
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}
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static inline void set(const struct_type* src,
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struct_type* target,
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bool copy) {
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target->ex_style = src->ex_style;
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cef_string_set(src->window_name.str, src->window_name.length,
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&target->window_name, copy);
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target->style = src->style;
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target->bounds = src->bounds;
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target->parent_window = src->parent_window;
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target->menu = src->menu;
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target->windowless_rendering_enabled = src->windowless_rendering_enabled;
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target->shared_texture_enabled = src->shared_texture_enabled;
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target->external_begin_frame_enabled = src->external_begin_frame_enabled;
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target->window = src->window;
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}
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};
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///
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/// Class representing window information.
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///
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class CefWindowInfo : public CefStructBase<CefWindowInfoTraits> {
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public:
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typedef CefStructBase<CefWindowInfoTraits> parent;
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CefWindowInfo() : parent() {}
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explicit CefWindowInfo(const cef_window_info_t& r) : parent(r) {}
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explicit CefWindowInfo(const CefWindowInfo& r) : parent(r) {}
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CefWindowInfo& operator=(const CefWindowInfo&) = default;
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CefWindowInfo& operator=(CefWindowInfo&&) = default;
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///
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/// Create the browser as a child window.
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///
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void SetAsChild(CefWindowHandle parent, const CefRect& windowBounds) {
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style =
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WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_TABSTOP | WS_VISIBLE;
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parent_window = parent;
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bounds = windowBounds;
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}
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///
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/// Create the browser as a popup window.
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///
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void SetAsPopup(CefWindowHandle parent, const CefString& windowName) {
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style =
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WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_VISIBLE;
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parent_window = parent;
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bounds.x = CW_USEDEFAULT;
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bounds.y = CW_USEDEFAULT;
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bounds.width = CW_USEDEFAULT;
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bounds.height = CW_USEDEFAULT;
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cef_string_copy(windowName.c_str(), windowName.length(), &window_name);
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}
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///
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/// Create the browser using windowless (off-screen) rendering. No window
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/// will be created for the browser and all rendering will occur via the
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/// CefRenderHandler interface. The |parent| value will be used to identify
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/// monitor info and to act as the parent window for dialogs, context menus,
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/// etc. If |parent| is not provided then the main screen monitor will be used
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/// and some functionality that requires a parent window may not function
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/// correctly. In order to create windowless browsers the
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/// CefSettings.windowless_rendering_enabled value must be set to true.
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/// Transparent painting is enabled by default but can be disabled by setting
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/// CefBrowserSettings.background_color to an opaque value.
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///
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void SetAsWindowless(CefWindowHandle parent) {
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windowless_rendering_enabled = TRUE;
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parent_window = parent;
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}
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};
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#if defined(ARCH_CPU_32_BITS)
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///
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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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///
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/// CEF's main thread needs at least a 1.5 MiB stack size in order to avoid
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/// stack overflow crashes. However, if this is set in the PE file then other
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/// threads get this size as well, leading to address-space exhaustion in 32-bit
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/// CEF. This function uses fibers to switch the main thread to a 4 MiB stack
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/// (roughly the same effective size as the 64-bit build's 8 MiB stack) before
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/// running any other code.
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///
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/// Choose the function variant that matches the entry point function type used
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/// by the executable. Reusing the entry point minimizes confusion when
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/// examining call stacks in crash reports.
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///
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/// If this function is already running on the fiber it will return -1
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/// immediately, meaning that execution should proceed with the remainder of the
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/// entry point function. Otherwise, this function will block until the entry
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/// point function has completed execution on the fiber and then return a result
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/// >= 0, meaning that the entry point function should return the result
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/// immediately without proceeding with execution.
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///
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int CefRunWinMainWithPreferredStackSize(wWinMainPtr wWinMain,
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HINSTANCE hInstance,
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LPWSTR lpCmdLine,
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int nCmdShow);
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int CefRunMainWithPreferredStackSize(mainPtr main, int argc, char* argv[]);
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#endif // defined(ARCH_CPU_32_BITS)
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///
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/// Call during process startup to enable High-DPI support on Windows 7 or
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/// newer. Older versions of Windows should be left DPI-unaware because they do
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/// not support DirectWrite and GDI fonts are kerned very badly.
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///
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void CefEnableHighDPISupport();
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///
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/// Set to true before calling Windows APIs like TrackPopupMenu that enter a
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/// modal message loop. Set to false after exiting the modal message loop.
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///
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void CefSetOSModalLoop(bool osModalLoop);
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#endif // CEF_INCLUDE_INTERNAL_CEF_WIN_H_
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