Changeset 277218 in webkit

Timestamp:

May 7, 2021, 6:04:02 PM (5 years ago)

Author:

Brent Fulgham

Message:

[iOS] [GPU] Silence warning about com.apple.audio.AudioComponentRegistrar in the WebContent process
​https://bugs.webkit.org/show_bug.cgi?id=225547
<rdar://problem/77334436>

Reviewed by Per Arne Vollan.

We block access to various media things (like 'com.apple.audio.AudioComponentRegistrar') when the GPU Process is being used.
Some AudioToolbox code continues to try to connect even though we are not activating relevant parts of the audio subsystem.
AudioToolbox doesn't care about this blocked connection when running in this mode, but they have not had a chance to modify
the framework to avoid attempting to connect.

To avoid spurious logging and telemetry, silence the sandbox violation when the GPU Process is active.

• Resources/SandboxProfiles/ios/com.apple.WebKit.WebContent.sb:

Location:

trunk/Source/WebKit

Files:

• ChangeLog (modified) (1 diff)
• Resources/SandboxProfiles/ios/com.apple.WebKit.WebContent.sb (modified) (1 diff)

trunk/Source/WebKit/ChangeLog

@@ +1 @@
+2021-05-07  Brent Fulgham  <bfulgham@apple.com>
+
+        [iOS] [GPU] Silence warning about com.apple.audio.AudioComponentRegistrar in the WebContent process
+        https://bugs.webkit.org/show_bug.cgi?id=225547
+        <rdar://problem/77334436>
+
+        Reviewed by Per Arne Vollan.
+
+        We block access to various media things (like 'com.apple.audio.AudioComponentRegistrar') when the GPU Process is being used.
+        Some AudioToolbox code continues to try to connect even though we are not activating relevant parts of the audio subsystem.
+        AudioToolbox doesn't care about this blocked connection when running in this mode, but they have not had a chance to modify
+        the framework to avoid attempting to connect.
+
+        To avoid spurious logging and telemetry, silence the sandbox violation when the GPU Process is active.
+
+        * Resources/SandboxProfiles/ios/com.apple.WebKit.WebContent.sb:
+
 2021-05-07  Brent Fulgham  <bfulgham@apple.com>
 

trunk/Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebContent.sb

@@ -1142 +1142 @@
             ;;; FIXME(207716): End services to remove.
 )))
+
+;; Silence warnings about these connections if we have decided not to extend access to them:
+(deny mach-lookup (with no-report)
+    (require-all
+        (require-not (extension "com.apple.webkit.extension.mach"))
+        (global-name
+            "com.apple.audio.AudioComponentRegistrar"
+        )
+    )
+)
 
 (allow mach-lookup