-#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
-