1 // Copyright (c) 2012 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 "content/renderer/renderer_main_platform_delegate.h"
7 #include <Carbon/Carbon.h>
8 #import <Cocoa/Cocoa.h>
9 #include <objc/runtime.h>
11 #include "base/command_line.h"
12 #include "base/logging.h"
13 #include "base/mac/mac_util.h"
14 #include "base/mac/scoped_cftyperef.h"
15 #include "base/strings/string_number_conversions.h"
16 #include "base/strings/sys_string_conversions.h"
17 #include "content/common/sandbox_mac.h"
18 #include "content/public/common/content_switches.h"
19 #include "content/common/sandbox_init_mac.h"
25 // You are about to read a pretty disgusting hack. In a static initializer,
26 // CoreFoundation decides to connect with cfprefsd(8) using Mach IPC. There is
27 // no public way to close this Mach port after-the-fact, nor a way to stop it
28 // from happening since it is done pre-main in dyld. But the address of the
29 // CFMachPort can be found in the run loop's string description. Below, that
30 // address is parsed, cast, and then used to invalidate the Mach port to
31 // disable communication with cfprefsd.
32 void DisconnectCFNotificationCenter() {
33 base::ScopedCFTypeRef<CFStringRef> run_loop_description(
34 CFCopyDescription(CFRunLoopGetCurrent()));
35 const CFIndex length = CFStringGetLength(run_loop_description);
36 for (CFIndex i = 0; i < length; ) {
37 // Find the start of a CFMachPort run loop source, which looks like this,
39 // 1 : <CFRunLoopSource 0x7d16ea90 [0xa160af80]>{signalled = No,
40 // valid = Yes, order = 0, context =
41 // <CFMachPort 0x7d16fe00 [0xa160af80]>{valid = Yes, port = 3a0f,
42 // source = 0x7d16ea90, callout =
43 // _ZL14MessageHandlerP12__CFMachPortPvlS1_ (0x96df59c2), context =
44 // <CFMachPort context 0x1475b>}}
45 CFRange run_loop_source_context_range;
46 if (!CFStringFindWithOptions(run_loop_description,
47 CFSTR(", context = <CFMachPort "), CFRangeMake(i, length - i),
48 0, &run_loop_source_context_range)) {
51 i = run_loop_source_context_range.location +
52 run_loop_source_context_range.length;
54 // The address of the CFMachPort is the first hexadecimal address after the
56 CFRange port_address_range = CFRangeMake(i, 0);
57 for (CFIndex j = port_address_range.location; j < length; ++j) {
58 UniChar c = CFStringGetCharacterAtIndex(run_loop_description, j);
61 ++port_address_range.length;
64 base::ScopedCFTypeRef<CFStringRef> port_address_string(
65 CFStringCreateWithSubstring(NULL, run_loop_description,
67 if (!port_address_string)
70 // Convert the string to an address.
71 std::string port_address_std_string =
72 base::SysCFStringRefToUTF8(port_address_string);
74 uint64 port_address = 0;
75 if (!base::HexStringToUInt64(port_address_std_string, &port_address))
78 uint32 port_address = 0;
79 if (!base::HexStringToUInt(port_address_std_string, &port_address))
83 // Cast the address to an object.
84 CFMachPortRef mach_port = reinterpret_cast<CFMachPortRef>(port_address);
85 if (CFGetTypeID(mach_port) != CFMachPortGetTypeID())
88 // Verify that this is the Mach port that needs to be disconnected by the
89 // name of its callout function. Example description (no new lines):
90 // <CFMachPort 0x7d16fe00 [0xa160af80]>{valid = Yes, port = 3a0f, source =
91 // 0x7d16ea90, callout = __CFXNotificationReceiveFromServer (0x96df59c2),
92 // context = <CFMachPort context 0x1475b>}
93 base::ScopedCFTypeRef<CFStringRef> port_description(
94 CFCopyDescription(mach_port));
95 if (CFStringFindWithOptions(port_description,
96 CFSTR(", callout = __CFXNotificationReceiveFromServer ("),
97 CFRangeMake(0, CFStringGetLength(port_description)),
100 CFMachPortInvalidate(mach_port);
108 RendererMainPlatformDelegate::RendererMainPlatformDelegate(
109 const MainFunctionParams& parameters)
110 : parameters_(parameters) {
113 RendererMainPlatformDelegate::~RendererMainPlatformDelegate() {
116 // TODO(mac-port): Any code needed to initialize a process for purposes of
117 // running a renderer needs to also be reflected in chrome_main.cc for
118 // --single-process support.
119 void RendererMainPlatformDelegate::PlatformInitialize() {
120 if (base::mac::IsOSYosemiteOrLater()) {
121 // This is needed by the NSAnimations run for the scrollbars. If we switch
122 // from native scrollers to drawing them in some other way, this warmup can
123 // be removed <http://crbug.com/306348>.
127 if (![NSThread isMultiThreaded]) {
128 NSString* string = @"";
129 [NSThread detachNewThreadSelector:@selector(length)
135 void RendererMainPlatformDelegate::PlatformUninitialize() {
138 bool RendererMainPlatformDelegate::EnableSandbox() {
139 // Enable the sandbox.
140 bool sandbox_initialized = InitializeSandbox();
142 // The sandbox is now engaged. Make sure that the renderer has not connected
146 DisconnectCFNotificationCenter();
148 return sandbox_initialized;
151 } // namespace content