[OSX] Drop more support for OSX 10.5 and earlier.

10.5 is ancient enough at this point. Remove code dealing with the exception server
that is not needed after it.

diff --git a/mono/mini/mini-darwin.c b/mono/mini/mini-darwin.c
index 4f8fbcf65853f668acdb0cc1be9140ae552f395a..c2907a9b494a8c4b5d879105aab45e05bea564f3 100644 (file)
--- a/mono/mini/mini-darwin.c
+++ b/mono/mini/mini-darwin.c
@@ -69,144 +69,6 @@
 #include <dlfcn.h>
 #include <AvailabilityMacros.h>
 
-#if defined (TARGET_OSX) && (MAC_OS_X_VERSION_MIN_REQUIRED <= MAC_OS_X_VERSION_10_5)
-#define NEEDS_EXCEPTION_THREAD
-#endif
-
-#ifdef NEEDS_EXCEPTION_THREAD
-
-/*
- * This code disables the CrashReporter of MacOS X by installing
- * a dummy Mach exception handler.
- */
-
-/*
- * http://darwinsource.opendarwin.org/10.4.3/xnu-792.6.22/osfmk/man/exc_server.html
- */
-extern boolean_t exc_server (mach_msg_header_t *request_msg, mach_msg_header_t *reply_msg);
-
-/*
- * The exception message
- */
-typedef struct {
-       mach_msg_base_t msg;  /* common mach message header */
-       char payload [1024];  /* opaque */
-} mach_exception_msg_t;
-
-/* The exception port */
-static mach_port_t mach_exception_port = VM_MAP_NULL;
-
-kern_return_t
-catch_exception_raise (
-       mach_port_t exception_port,
-       mach_port_t thread,
-       mach_port_t task,
-       exception_type_t exception,
-       exception_data_t code,
-       mach_msg_type_number_t code_count);
-
-/*
- * Implicitly called by exc_server. Must be public.
- *
- * http://darwinsource.opendarwin.org/10.4.3/xnu-792.6.22/osfmk/man/catch_exception_raise.html
- */
-kern_return_t
-catch_exception_raise (
-       mach_port_t exception_port,
-       mach_port_t thread,
-       mach_port_t task,
-       exception_type_t exception,
-       exception_data_t code,
-       mach_msg_type_number_t code_count)
-{
-       /* consume the exception */
-       return KERN_FAILURE;
-}
-
-/*
- * Exception thread handler.
- */
-static
-void *
-mach_exception_thread (void *arg)
-{
-       for (;;) {
-               mach_exception_msg_t request;
-               mach_exception_msg_t reply;
-               mach_msg_return_t result;
-
-               /* receive from "mach_exception_port" */
-               result = mach_msg (&request.msg.header,
-                                  MACH_RCV_MSG | MACH_RCV_LARGE,
-                                  0,
-                                  sizeof (request),
-                                  mach_exception_port,
-                                  MACH_MSG_TIMEOUT_NONE,
-                                  MACH_PORT_NULL);
-
-               g_assert (result == MACH_MSG_SUCCESS);
-
-               /* dispatch to catch_exception_raise () */
-               exc_server (&request.msg.header, &reply.msg.header);
-
-               /* send back to sender */
-               result = mach_msg (&reply.msg.header,
-                                  MACH_SEND_MSG,
-                                  reply.msg.header.msgh_size,
-                                  0,
-                                  MACH_PORT_NULL,
-                                  MACH_MSG_TIMEOUT_NONE,
-                                  MACH_PORT_NULL);
-
-               /*
-               If we try to abort the thread while delivering an exception. The port will be gone since the kernel
-               setup a send once port to deliver the resume message and thread_abort will consume it.
-               */
-               g_assert (result == MACH_MSG_SUCCESS || result == MACH_SEND_INVALID_DEST);
-       }
-       return NULL;
-}
-
-static void
-macosx_register_exception_handler (void)
-{
-       mach_port_t task;
-       pthread_attr_t attr;
-       pthread_t thread;
-
-       if (mach_exception_port != VM_MAP_NULL)
-               return;
-
-       task = mach_task_self ();
-
-       /* create the "mach_exception_port" with send & receive rights */
-       g_assert (mach_port_allocate (task, MACH_PORT_RIGHT_RECEIVE,
-                                     &mach_exception_port) == KERN_SUCCESS);
-       g_assert (mach_port_insert_right (task, mach_exception_port, mach_exception_port,
-                                         MACH_MSG_TYPE_MAKE_SEND) == KERN_SUCCESS);
-
-       /* create the exception handler thread */
-       g_assert (!pthread_attr_init (&attr));
-       g_assert (!pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED));
-       g_assert (!pthread_create (&thread, &attr, mach_exception_thread, NULL));
-       pthread_attr_destroy (&attr);
-
-       /*
-        * register "mach_exception_port" as a receiver for the
-        * EXC_BAD_ACCESS exception
-        *
-        * http://darwinsource.opendarwin.org/10.4.3/xnu-792.6.22/osfmk/man/task_set_exception_ports.html
-        */
-       g_assert (task_set_exception_ports (task, EXC_MASK_BAD_ACCESS,
-                                           mach_exception_port,
-                                           EXCEPTION_DEFAULT,
-                                           MACHINE_THREAD_STATE) == KERN_SUCCESS);
-
-       mono_gc_register_mach_exception_thread (thread);
-}
-
-#endif
-
 /* This is #define'd by Boehm GC to _GC_dlopen. */
 #undef dlopen
 
@@ -215,9 +77,6 @@ void* dlopen(const char* path, int mode);
 void
 mono_runtime_install_handlers (void)
 {
-#ifdef NEEDS_EXCEPTION_THREAD
-       macosx_register_exception_handler ();
-#endif
        mono_runtime_posix_install_handlers ();
 
        /* Snow Leopard has a horrible bug: http://openradar.appspot.com/7209349