Add logging related to Mach bootstrap enablement

https://bugs.webkit.org/show_bug.cgi?id=240909

Reviewed by Chris Dumez.

We are seeing telemetry that indicates that enabling Mach bootstrap is failing in some cases.
Add logging to help diagnose this.

* Source/WebKit/Platform/Logging.h:
* Source/WebKit/Shared/Cocoa/SandboxExtensionCocoa.mm:
(WebKit::SandboxExtension::createHandleForMachLookup):
* Source/WebKit/Shared/Cocoa/SandboxExtensionCocoa.mm:
(WebKit::SandboxExtension::createHandleForMachLookup):

Canonical link: https://commits.webkit.org/250963@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@294809 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Source/WebKit/Platform/Logging.h

@@ -93,6 +93,7 @@ extern "C" {
     M(RemoteLayerTree) \
     M(Resize) \
     M(ResourceLoadStatistics) \
+    M(Sandbox) \
     M(ScrollAnimations) \
     M(Scrolling) \
     M(Selection) \

Source/WebKit/Shared/Cocoa/SandboxExtensionCocoa.mm

@@ -32,6 +32,7 @@
 #import "DataReference.h"
 #import "Decoder.h"
 #import "Encoder.h"
+#import "Logging.h"
 #import "WebCoreArgumentCoders.h"
 #import <string.h>
 #import <wtf/FileSystem.h>
@@ -337,8 +338,11 @@ String resolvePathForSandboxExtension(StringView path)
     // This is done by unblocking launchd, since launchd access is required when creating Mach connections.
     // Unblocking launchd is done by enabling a sandbox state variable.
     // In the initial version of this change, Mach bootstrap'ing is enabled unconditionally.
-    if (auditToken)
-        sandbox_enable_state_flag(ENABLE_MACH_BOOTSTRAP, *auditToken);
+    if (auditToken) {
+        if (!sandbox_enable_state_flag(ENABLE_MACH_BOOTSTRAP, *auditToken))
+            RELEASE_LOG_FAULT(Sandbox, "Could not enable Mach bootstrap, errno = %d.", errno);
+    } else if (machBootstrapOptions == MachBootstrapOptions::EnableMachBootstrap)
+        RELEASE_LOG_FAULT(Sandbox, "Could not enable Mach bootstrap, no audit token provided.");
 #endif
 
     return WTFMove(handle);