X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/1c79356b52d46aa6b508fb032f5ae709b1f2897b..b0d623f7f2ae71ed96e60569f61f9a9a27016e80:/osfmk/kern/exception.c

diff --git a/osfmk/kern/exception.c b/osfmk/kern/exception.c
index 70c1d0e0a..a3578e1a0 100644
--- a/osfmk/kern/exception.c
+++ b/osfmk/kern/exception.c
@@ -1,23 +1,29 @@
 /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * @OSF_COPYRIGHT@
@@ -52,13 +58,17 @@
 
 #include <mach_kdb.h>
 
+#include <mach/mach_types.h>
 #include <mach/boolean.h>
 #include <mach/kern_return.h>
 #include <mach/message.h>
 #include <mach/port.h>
 #include <mach/mig_errors.h>
+#include <mach/task.h>
 #include <mach/thread_status.h>
 #include <mach/exception_types.h>
+#include <mach/exc.h>
+#include <mach/mach_exc.h>
 #include <ipc/port.h>
 #include <ipc/ipc_entry.h>
 #include <ipc/ipc_object.h>
@@ -66,20 +76,16 @@
 #include <ipc/ipc_space.h>
 #include <ipc/ipc_pset.h>
 #include <ipc/ipc_machdep.h>
-#include <kern/etap_macros.h>
 #include <kern/counters.h>
 #include <kern/ipc_tt.h>
 #include <kern/task.h>
 #include <kern/thread.h>
-#include <kern/thread_swap.h>
 #include <kern/processor.h>
 #include <kern/sched.h>
 #include <kern/sched_prim.h>
 #include <kern/host.h>
 #include <kern/misc_protos.h>
 #include <string.h>
-#include <mach/exc.h>            /* JMM - will become exception.h */
-#include <machine/machine_rpc.h>
 
 #if	MACH_KDB
 #include <ddb/db_trap.h>
@@ -104,6 +110,21 @@ unsigned long c_tsk_exc_raise = 0;
 unsigned long c_tsk_exc_raise_state = 0;
 unsigned long c_tsk_exc_raise_state_id = 0;
 
+/* forward declarations */
+kern_return_t exception_deliver(
+	thread_t 		thread,
+	exception_type_t	exception,
+	mach_exception_data_t	code,
+	mach_msg_type_number_t  codeCnt,
+	struct exception_action *excp,
+	lck_mtx_t			*mutex);
+
+#ifdef MACH_BSD
+kern_return_t bsd_exception(
+	exception_type_t	exception,
+	mach_exception_data_t	code,
+	mach_msg_type_number_t  codeCnt);
+#endif /* MACH_BSD */
 
 /*
  *	Routine:	exception_deliver
@@ -115,18 +136,20 @@ unsigned long c_tsk_exc_raise_state_id = 0;
  *		thread_exception_return and thread_kdb_return
  *		are possible.
  *	Returns:
- *		If the exception was not handled by this handler
+ *		KERN_SUCCESS if the exception was handled
  */
-void
+kern_return_t 
 exception_deliver(
+	thread_t		thread,
 	exception_type_t	exception,
-	exception_data_t	code,
+	mach_exception_data_t	code,
 	mach_msg_type_number_t  codeCnt,
 	struct exception_action *excp,
-	mutex_t			*mutex)
+	lck_mtx_t			*mutex)
 {
-	thread_act_t		a_self = current_act();
 	ipc_port_t		exc_port;
+	exception_data_type_t	small_code[EXCEPTION_CODE_MAX];
+	int			code64;
 	int			behavior;
 	int			flavor;
 	kern_return_t		kr;
@@ -135,8 +158,8 @@ exception_deliver(
 	 *  Save work if we are terminating.
 	 *  Just go back to our AST handler.
 	 */
-	if (!a_self->active)
-		thread_exception_return();
+	if (!thread->active)
+		return KERN_SUCCESS;
 
 	/*
 	 * Snapshot the exception action data under lock for consistency.
@@ -145,17 +168,17 @@ exception_deliver(
 	 * the port from disappearing between now and when
 	 * ipc_object_copyin_from_kernel is finally called.
 	 */
-	mutex_lock(mutex);
+	lck_mtx_lock(mutex);
 	exc_port = excp->port;
 	if (!IP_VALID(exc_port)) {
-		mutex_unlock(mutex);
-		return;
+		lck_mtx_unlock(mutex);
+		return KERN_FAILURE;
 	}
 	ip_lock(exc_port);
 	if (!ip_active(exc_port)) {
 		ip_unlock(exc_port);
-		mutex_unlock(mutex);
-		return;
+		lck_mtx_unlock(mutex);
+		return KERN_FAILURE;
 	}
 	ip_reference(exc_port);	
 	exc_port->ip_srights++;
@@ -163,81 +186,117 @@ exception_deliver(
 
 	flavor = excp->flavor;
 	behavior = excp->behavior;
-	mutex_unlock(mutex);
+	lck_mtx_unlock(mutex);
+
+	code64 = (behavior & MACH_EXCEPTION_CODES);
+	behavior &= ~MACH_EXCEPTION_CODES;
+
+	if (!code64) {
+		small_code[0] = CAST_DOWN_EXPLICIT(exception_data_type_t, code[0]);
+		small_code[1] = CAST_DOWN_EXPLICIT(exception_data_type_t, code[1]);
+	}
+
 
 	switch (behavior) {
 	case EXCEPTION_STATE: {
 		mach_msg_type_number_t state_cnt;
-		natural_t state[ THREAD_MACHINE_STATE_MAX ];
+		thread_state_data_t state;
 
 		c_thr_exc_raise_state++;
-		state_cnt = state_count[flavor];
-		kr = thread_getstatus(a_self, flavor, 
+		state_cnt = _MachineStateCount[flavor];
+		kr = thread_getstatus(thread, flavor, 
 				      (thread_state_t)state,
 				      &state_cnt);
 		if (kr == KERN_SUCCESS) {
-			kr = exception_raise_state(exc_port, exception,
-						   code, codeCnt,
-						   &flavor,
-						   state, state_cnt,
-						   state, &state_cnt);
+			if (code64) {
+				kr = mach_exception_raise_state(exc_port, 
+						exception,
+						code, 
+						codeCnt,
+						&flavor,
+						state, state_cnt,
+						state, &state_cnt);
+			} else {
+				kr = exception_raise_state(exc_port, exception,
+						small_code, 
+						codeCnt,
+						&flavor,
+						state, state_cnt,
+						state, &state_cnt);
+			}
 			if (kr == MACH_MSG_SUCCESS)
-				kr = thread_setstatus(a_self, flavor, 
-						      (thread_state_t)state,
-						      state_cnt);
+				kr = thread_setstatus(thread, flavor, 
+						(thread_state_t)state,
+						state_cnt);
 		}
 
-		if (kr == KERN_SUCCESS || kr == MACH_RCV_PORT_DIED)
-			thread_exception_return();
-			/*NOTREACHED*/
-		return;
+		return kr;
 	}
 
 	case EXCEPTION_DEFAULT:
 		c_thr_exc_raise++;
-		kr = exception_raise(exc_port,
-				retrieve_act_self_fast(a_self),
-				retrieve_task_self_fast(a_self->task),
-				exception,
-				code, codeCnt);
+		if (code64) {
+			kr = mach_exception_raise(exc_port,
+					retrieve_thread_self_fast(thread),
+					retrieve_task_self_fast(thread->task),
+					exception,
+					code, 
+					codeCnt);
+		} else {
+			kr = exception_raise(exc_port,
+					retrieve_thread_self_fast(thread),
+					retrieve_task_self_fast(thread->task),
+					exception,
+					small_code, 
+					codeCnt);
+		}
 
-		if (kr == KERN_SUCCESS || kr == MACH_RCV_PORT_DIED)
-			thread_exception_return();
-			/*NOTREACHED*/
-		return;
+		return kr;
 
 	case EXCEPTION_STATE_IDENTITY: {
 		mach_msg_type_number_t state_cnt;
-		natural_t state[ THREAD_MACHINE_STATE_MAX ];
+		thread_state_data_t state;
 
 		c_thr_exc_raise_state_id++;
-		state_cnt = state_count[flavor];
-		kr = thread_getstatus(a_self, flavor,
+		state_cnt = _MachineStateCount[flavor];
+		kr = thread_getstatus(thread, flavor,
 				      (thread_state_t)state,
 				      &state_cnt);
 		if (kr == KERN_SUCCESS) {
-		    kr = exception_raise_state_identity(exc_port,
-				retrieve_act_self_fast(a_self),
-				retrieve_task_self_fast(a_self->task),
-				exception,
-				code, codeCnt,
-				&flavor,
-				state, state_cnt,
-				state, &state_cnt);
-		    if (kr == MACH_MSG_SUCCESS)
-			kr = thread_setstatus(a_self, flavor,
-					      (thread_state_t)state,
-					      state_cnt);
+			if (code64) {
+				kr = mach_exception_raise_state_identity(
+						exc_port,
+						retrieve_thread_self_fast(thread),
+						retrieve_task_self_fast(thread->task),
+						exception,
+						code, 
+						codeCnt,
+						&flavor,
+						state, state_cnt,
+						state, &state_cnt);
+			} else {
+				kr = exception_raise_state_identity(exc_port,
+						retrieve_thread_self_fast(thread),
+						retrieve_task_self_fast(thread->task),
+						exception,
+						small_code, 
+						codeCnt,
+						&flavor,
+						state, state_cnt,
+						state, &state_cnt);
+			}
+			if (kr == MACH_MSG_SUCCESS)
+				kr = thread_setstatus(thread, flavor,
+						(thread_state_t)state,
+						state_cnt);
 		}
 
-		if (kr == KERN_SUCCESS || kr == MACH_RCV_PORT_DIED)
-			thread_exception_return();
-			/*NOTREACHED*/
-		return;
+		return kr;
 	}
-	
+
 	default:
-		panic ("bad exception behavior!");
+	       panic ("bad exception behavior!");
+	       return KERN_FAILURE; 
 	}/* switch */
 }
 
@@ -255,16 +314,17 @@ exception_deliver(
  *		Doesn't return.
  */
 void
-exception(
+exception_triage(
 	exception_type_t	exception,
-	exception_data_t	code,
+	mach_exception_data_t	code,
 	mach_msg_type_number_t  codeCnt)
 {
-	thread_act_t		thr_act;
+	thread_t		thread;
 	task_t			task;
 	host_priv_t		host_priv;
 	struct exception_action *excp;
-	mutex_t			*mutex;
+	lck_mtx_t			*mutex;
+	kern_return_t		kr;
 
 	assert(exception != EXC_RPC_ALERT);
 
@@ -274,26 +334,32 @@ exception(
 	/*
 	 * Try to raise the exception at the activation level.
 	 */
-	thr_act = current_act();
-	mutex = mutex_addr(thr_act->lock);
-	excp = &thr_act->exc_actions[exception];
-	exception_deliver(exception, code, codeCnt, excp, mutex);
+	thread = current_thread();
+	mutex = &thread->mutex;
+	excp = &thread->exc_actions[exception];
+	kr = exception_deliver(thread, exception, code, codeCnt, excp, mutex);
+	if (kr == KERN_SUCCESS || kr == MACH_RCV_PORT_DIED)
+		goto out;
 
 	/*
 	 * Maybe the task level will handle it.
 	 */
 	task = current_task();
-	mutex = mutex_addr(task->lock);
+	mutex = &task->lock;
 	excp = &task->exc_actions[exception];
-	exception_deliver(exception, code, codeCnt, excp, mutex);
+	kr = exception_deliver(thread, exception, code, codeCnt, excp, mutex);
+	if (kr == KERN_SUCCESS || kr == MACH_RCV_PORT_DIED)
+		goto out;
 
 	/*
 	 * How about at the host level?
 	 */
 	host_priv = host_priv_self();
-	mutex = mutex_addr(host_priv->lock);
+	mutex = &host_priv->lock;
 	excp = &host_priv->exc_actions[exception];
-	exception_deliver(exception, code, codeCnt, excp, mutex);
+	kr = exception_deliver(thread, exception, code, codeCnt, excp, mutex);
+	if (kr == KERN_SUCCESS || kr == MACH_RCV_PORT_DIED)
+		goto out;
 
 	/*
 	 * Nobody handled it, terminate the task.
@@ -312,6 +378,100 @@ exception(
 #endif	/* MACH_KDB */
 
 	(void) task_terminate(task);
-	thread_exception_return();
-	/*NOTREACHED*/
+
+out:
+	if (exception != EXC_CRASH)
+		thread_exception_return();
+	return;
+}
+
+kern_return_t
+bsd_exception(
+	exception_type_t	exception,
+	mach_exception_data_t	code,
+	mach_msg_type_number_t  codeCnt)
+{
+	task_t			task;
+	struct exception_action *excp;
+	lck_mtx_t		*mutex;
+	thread_t		self = current_thread();
+	kern_return_t		kr;
+
+	/*
+	 * Maybe the task level will handle it.
+	 */
+	task = current_task();
+	mutex = &task->lock;
+	excp = &task->exc_actions[exception];
+
+	kr = exception_deliver(self, exception, code, codeCnt, excp, mutex);
+
+	if (kr == KERN_SUCCESS || kr == MACH_RCV_PORT_DIED)
+		return(KERN_SUCCESS);
+	return(KERN_FAILURE);
 }
+
+
+/*
+ * Raise an EXC_CRASH exception on the dying task.
+ * This should tell launchd to launch Crash Reporter for this task.
+ */
+kern_return_t abnormal_exit_notify(mach_exception_data_type_t exccode, 
+		mach_exception_data_type_t excsubcode)
+{
+	mach_exception_data_type_t	code[EXCEPTION_CODE_MAX];
+	wait_interrupt_t		wsave;
+
+	code[0] = exccode;
+	code[1] = excsubcode;
+
+	wsave = thread_interrupt_level(THREAD_UNINT);
+	exception_triage(EXC_CRASH, code, EXCEPTION_CODE_MAX);
+	(void) thread_interrupt_level(wsave);
+	return (KERN_SUCCESS);
+}
+
+
+/*
+ *	Handle interface for special performance monitoring
+ *	This is a special case of the host exception handler
+ */
+kern_return_t sys_perf_notify(thread_t thread, int pid) 
+{
+
+	host_priv_t		hostp;
+	struct exception_action *excp;
+	ipc_port_t		xport;
+	wait_interrupt_t	wsave;
+	kern_return_t		ret;
+
+	hostp = host_priv_self();	/* Get the host privileged ports */
+	mach_exception_data_type_t	code[EXCEPTION_CODE_MAX];
+	code[0] = 0xFF000001;		/* Set terminate code */
+	code[1] = pid;		/* Pass out the pid */
+
+	struct task *task = thread->task;
+	excp = &hostp->exc_actions[EXC_RPC_ALERT];	
+	xport = excp->port;	
+
+	/* Make sure we're not catching our own exception */
+	if (!IP_VALID(xport) ||
+			!ip_active(xport) ||
+			task->itk_space == xport->data.receiver) {
+
+		return(KERN_FAILURE);	
+	}
+
+	wsave = thread_interrupt_level(THREAD_UNINT);	
+	ret = exception_deliver(
+			thread,
+			EXC_RPC_ALERT, 
+			code, 
+			2, 
+			excp,
+			&hostp->lock);
+	(void)thread_interrupt_level(wsave);
+
+	return(ret);
+}
+