2011-03-31 Sam Weinig <sam@webkit.org>
[WebKit-https.git] / Source / WebKit2 / WebProcess / mac / WebProcessMac.mm
1 /*
2  * Copyright (C) 2010 Apple Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23  * THE POSSIBILITY OF SUCH DAMAGE.
24  */
25
26 #import "config.h"
27 #import "WebProcess.h"
28
29 #import "FullKeyboardAccessWatcher.h"
30 #import "SandboxExtension.h"
31 #import "WebPage.h"
32 #import "WebProcessCreationParameters.h"
33 #import <WebCore/FileSystem.h>
34 #import <WebCore/MemoryCache.h>
35 #import <WebCore/PageCache.h>
36 #import <WebKitSystemInterface.h>
37 #import <algorithm>
38 #import <dispatch/dispatch.h>
39 #import <mach/host_info.h>
40 #import <mach/mach.h>
41 #import <mach/mach_error.h>
42 #import <objc/runtime.h>
43 #import <WebCore/LocalizedStrings.h>
44
45 #if ENABLE(WEB_PROCESS_SANDBOX)
46 #import <sandbox.h>
47 #import <stdlib.h>
48 #import <sysexits.h>
49 #endif
50
51 using namespace WebCore;
52 using namespace std;
53
54 namespace WebKit {
55
56 static uint64_t memorySize()
57 {
58     static host_basic_info_data_t hostInfo;
59
60     static dispatch_once_t once;
61     dispatch_once(&once, ^() {
62         mach_port_t host = mach_host_self();
63         mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
64         kern_return_t r = host_info(host, HOST_BASIC_INFO, (host_info_t)&hostInfo, &count);
65         mach_port_deallocate(mach_task_self(), host);
66
67         if (r != KERN_SUCCESS)
68             LOG_ERROR("%s : host_info(%d) : %s.\n", __FUNCTION__, r, mach_error_string(r));
69     });
70
71     return hostInfo.max_mem;
72 }
73
74 static uint64_t volumeFreeSize(NSString *path)
75 {
76     NSDictionary *fileSystemAttributesDictionary = [[NSFileManager defaultManager] attributesOfFileSystemForPath:path error:NULL];
77     return [[fileSystemAttributesDictionary objectForKey:NSFileSystemFreeSize] unsignedLongLongValue];
78 }
79
80 void WebProcess::platformSetCacheModel(CacheModel cacheModel)
81 {
82     RetainPtr<NSString> nsurlCacheDirectory(AdoptNS, (NSString *)WKCopyFoundationCacheDirectory());
83     if (!nsurlCacheDirectory)
84         nsurlCacheDirectory = NSHomeDirectory();
85
86     // As a fudge factor, use 1000 instead of 1024, in case the reported byte 
87     // count doesn't align exactly to a megabyte boundary.
88     uint64_t memSize = memorySize() / 1024 / 1000;
89     uint64_t diskFreeSize = volumeFreeSize(nsurlCacheDirectory.get()) / 1024 / 1000;
90
91     unsigned cacheTotalCapacity = 0;
92     unsigned cacheMinDeadCapacity = 0;
93     unsigned cacheMaxDeadCapacity = 0;
94     double deadDecodedDataDeletionInterval = 0;
95     unsigned pageCacheCapacity = 0;
96     unsigned long urlCacheMemoryCapacity = 0;
97     unsigned long urlCacheDiskCapacity = 0;
98
99     calculateCacheSizes(cacheModel, memSize, diskFreeSize,
100         cacheTotalCapacity, cacheMinDeadCapacity, cacheMaxDeadCapacity, deadDecodedDataDeletionInterval,
101         pageCacheCapacity, urlCacheMemoryCapacity, urlCacheDiskCapacity);
102
103
104     memoryCache()->setCapacities(cacheMinDeadCapacity, cacheMaxDeadCapacity, cacheTotalCapacity);
105     memoryCache()->setDeadDecodedDataDeletionInterval(deadDecodedDataDeletionInterval);
106     pageCache()->setCapacity(pageCacheCapacity);
107
108     NSURLCache *nsurlCache = [NSURLCache sharedURLCache];
109     [nsurlCache setMemoryCapacity:urlCacheMemoryCapacity];
110     [nsurlCache setDiskCapacity:max<unsigned long>(urlCacheDiskCapacity, [nsurlCache diskCapacity])]; // Don't shrink a big disk cache, since that would cause churn.
111 }
112
113 void WebProcess::platformClearResourceCaches(ResourceCachesToClear cachesToClear)
114 {
115     if (cachesToClear == InMemoryResourceCachesOnly)
116         return;
117     [[NSURLCache sharedURLCache] removeAllCachedResponses];
118 }
119
120 bool WebProcess::fullKeyboardAccessEnabled()
121 {
122     return [FullKeyboardAccessWatcher fullKeyboardAccessEnabled];
123 }
124
125 #if ENABLE(WEB_PROCESS_SANDBOX)
126 static void appendSandboxParameterPathInternal(Vector<const char*>& vector, const char* name, const char* path)
127 {
128     char normalizedPath[PATH_MAX];
129     if (!realpath(path, normalizedPath))
130         normalizedPath[0] = '\0';
131
132     vector.append(name);
133     vector.append(fastStrDup(normalizedPath));
134 }
135
136 static void appendReadwriteConfDirectory(Vector<const char*>& vector, const char* name, int confID)
137 {
138     char path[PATH_MAX];
139     if (confstr(confID, path, PATH_MAX) <= 0)
140         path[0] = '\0';
141
142     appendSandboxParameterPathInternal(vector, name, path);
143 }
144
145 static void appendReadonlySandboxDirectory(Vector<const char*>& vector, const char* name, NSString *path)
146 {
147     appendSandboxParameterPathInternal(vector, name, [(NSString *)path fileSystemRepresentation]);
148 }
149
150 static void appendReadwriteSandboxDirectory(Vector<const char*>& vector, const char* name, NSString *path)
151 {
152     NSError *error = nil;
153
154     // This is very unlikely to fail, but in case it actually happens, we'd like some sort of output in the console.
155     if (![[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:&error])
156         NSLog(@"could not create \"%@\", error %@", path, error);
157
158     appendSandboxParameterPathInternal(vector, name, [(NSString *)path fileSystemRepresentation]);
159 }
160
161 #endif
162
163 static void initializeSandbox(const WebProcessCreationParameters& parameters)
164 {
165 #if ENABLE(WEB_PROCESS_SANDBOX)
166     if ([[NSUserDefaults standardUserDefaults] boolForKey:@"DisableSandbox"]) {
167         fprintf(stderr, "Bypassing sandbox due to DisableSandbox user default.\n");
168         return;
169     }
170
171     Vector<const char*> sandboxParameters;
172
173     // These are read-only.
174     appendReadonlySandboxDirectory(sandboxParameters, "WEBKIT2_FRAMEWORK_DIR", [[[NSBundle bundleForClass:NSClassFromString(@"WKView")] bundlePath] stringByDeletingLastPathComponent]);
175     appendReadonlySandboxDirectory(sandboxParameters, "UI_PROCESS_BUNDLE_RESOURCE_DIR", parameters.uiProcessBundleResourcePath);
176
177     // These are read-write getconf paths.
178     appendReadwriteConfDirectory(sandboxParameters, "DARWIN_USER_TEMP_DIR", _CS_DARWIN_USER_TEMP_DIR);
179     appendReadwriteConfDirectory(sandboxParameters, "DARWIN_USER_CACHE_DIR", _CS_DARWIN_USER_CACHE_DIR);
180
181     // These are read-write paths.
182     appendReadwriteSandboxDirectory(sandboxParameters, "HOME_DIR", NSHomeDirectory());
183     appendReadwriteSandboxDirectory(sandboxParameters, "WEBKIT_DATABASE_DIR", parameters.databaseDirectory);
184     appendReadwriteSandboxDirectory(sandboxParameters, "WEBKIT_LOCALSTORAGE_DIR", parameters.localStorageDirectory);
185     appendReadwriteSandboxDirectory(sandboxParameters, "NSURL_CACHE_DIR", parameters.nsURLCachePath);
186
187     sandboxParameters.append(static_cast<const char*>(0));
188
189     const char* profilePath = [[[NSBundle mainBundle] pathForResource:@"com.apple.WebProcess" ofType:@"sb"] fileSystemRepresentation];
190
191     char* errorBuf;
192     if (sandbox_init_with_parameters(profilePath, SANDBOX_NAMED_EXTERNAL, sandboxParameters.data(), &errorBuf)) {
193         fprintf(stderr, "WebProcess: couldn't initialize sandbox profile [%s]\n", profilePath);
194         for (size_t i = 0; sandboxParameters[i]; i += 2)
195             fprintf(stderr, "%s=%s\n", sandboxParameters[i], sandboxParameters[i + 1]);
196         exit(EX_NOPERM);
197     }
198
199     for (size_t i = 0; sandboxParameters[i]; i += 2)
200         fastFree(const_cast<char*>(sandboxParameters[i + 1]));
201 #endif
202 }
203
204 static id NSApplicationAccessibilityFocusedUIElement(NSApplication*, SEL)
205 {
206     WebPage* page = WebProcess::shared().focusedWebPage();
207     if (!page || !page->accessibilityRemoteObject())
208         return 0;
209
210     return [page->accessibilityRemoteObject() accessibilityFocusedUIElement];
211 }
212     
213 void WebProcess::platformInitializeWebProcess(const WebProcessCreationParameters& parameters, CoreIPC::ArgumentDecoder*)
214 {
215     [[NSFileManager defaultManager] changeCurrentDirectoryPath:[[NSBundle mainBundle] bundlePath]];
216
217     initializeSandbox(parameters);
218
219     if (!parameters.parentProcessName.isNull()) {
220         NSString *applicationName = [NSString stringWithFormat:WEB_UI_STRING("%@ Web Content", "Visible name of the web process. The argument is the application name."), (NSString *)parameters.parentProcessName];
221         WKSetVisibleApplicationName((CFStringRef)applicationName);
222     }
223
224     if (!parameters.nsURLCachePath.isNull()) {
225         NSUInteger cacheMemoryCapacity = parameters.nsURLCacheMemoryCapacity;
226         NSUInteger cacheDiskCapacity = parameters.nsURLCacheDiskCapacity;
227
228         RetainPtr<NSURLCache> parentProcessURLCache(AdoptNS, [[NSURLCache alloc] initWithMemoryCapacity:cacheMemoryCapacity diskCapacity:cacheDiskCapacity diskPath:parameters.nsURLCachePath]);
229         [NSURLCache setSharedURLCache:parentProcessURLCache.get()];
230     }
231
232     m_compositingRenderServerPort = parameters.acceleratedCompositingPort.port();
233
234     // rdar://9118639 accessibilityFocusedUIElement in NSApplication defaults to use the keyWindow. Since there's
235     // no window in WK2, NSApplication needs to use the focused page's focused element.
236     Method methodToPatch = class_getInstanceMethod([NSApplication class], @selector(accessibilityFocusedUIElement));
237     method_setImplementation(methodToPatch, (IMP)NSApplicationAccessibilityFocusedUIElement);
238 }
239
240 void WebProcess::platformTerminate()
241 {
242 }
243
244 } // namespace WebKit