handler/mac: Log a warning when an exception message has a suspicious

handler/mac/exception_handler_server.cc

Index: handler/mac/exception_handler_server.cc
diff --git a/handler/mac/exception_handler_server.cc b/handler/mac/exception_handler_server.cc
index 803ebfdce1d74338bcd0e48e9cfa781349e61f5e..4d6373dd65751834e7e1c0b8f7df920344a3b116 100644
--- a/handler/mac/exception_handler_server.cc
+++ b/handler/mac/exception_handler_server.cc
@@ -26,9 +26,8 @@ namespace crashpad {
 
 namespace {
 
-class ExceptionHandlerServerRun
-    : public UniversalMachExcServer::Interface,
-      public NotifyServer::Interface {
+class ExceptionHandlerServerRun : public UniversalMachExcServer::Interface,
+                                  public NotifyServer::Interface {
  public:
   ExceptionHandlerServerRun(
       mach_port_t exception_port,
@@ -97,13 +96,14 @@ class ExceptionHandlerServerRun
     while (running_) {
       // This will result in a call to CatchMachException() or
       // DoMachNotifyNoSenders() as appropriate.
-      mach_msg_return_t mr =
-          MachMessageServer::Run(&composite_mach_message_server_,
-                                 server_port_set,
-                                 MACH_MSG_OPTION_NONE,
-                                 MachMessageServer::kOneShot,
-                                 MachMessageServer::kReceiveLargeIgnore,
-                                 kMachMessageTimeoutWaitIndefinitely);
+      mach_msg_return_t mr = MachMessageServer::Run(
+          &composite_mach_message_server_,
+          server_port_set,
+          MACH_RCV_TRAILER_TYPE(MACH_MSG_TRAILER_FORMAT_0) |
+              MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_AUDIT),
+          MachMessageServer::kOneShot,
+          MachMessageServer::kReceiveLargeIgnore,
+          kMachMessageTimeoutWaitIndefinitely);
       MACH_CHECK(mr == MACH_MSG_SUCCESS, mr) << "MachMessageServer::Run";
     }
   }
@@ -148,9 +148,9 @@ class ExceptionHandlerServerRun
   // NotifyServer::Interface:
 
   kern_return_t DoMachNotifyPortDeleted(
-        notify_port_t notify,
-        mach_port_name_t name,
-        const mach_msg_trailer_t* trailer) override {
+      notify_port_t notify,
+      mach_port_name_t name,
+      const mach_msg_trailer_t* trailer) override {
     return UnimplementedNotifyRoutine(notify);
   }