1 /* 2 * Copyright (C) 2010 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include "config.h" 27 #include "MachUtilities.h" 28 29 #include <mach/task.h> 30 setMachPortQueueLength(mach_port_t receivePort,mach_port_msgcount_t queueLength)31 void setMachPortQueueLength(mach_port_t receivePort, mach_port_msgcount_t queueLength) 32 { 33 mach_port_limits_t portLimits; 34 portLimits.mpl_qlimit = queueLength; 35 36 mach_port_set_attributes(mach_task_self(), receivePort, MACH_PORT_LIMITS_INFO, reinterpret_cast<mach_port_info_t>(&portLimits), MACH_PORT_LIMITS_INFO_COUNT); 37 } 38 machExceptionPort()39 mach_port_t machExceptionPort() 40 { 41 exception_mask_t exceptionMasks[EXC_TYPES_COUNT]; 42 exception_port_t exceptionHandlers[EXC_TYPES_COUNT]; 43 exception_behavior_t exceptionBehaviors[EXC_TYPES_COUNT]; 44 thread_state_flavor_t exceptionFlavors[EXC_TYPES_COUNT]; 45 mach_msg_type_number_t numExceptionMasks; 46 47 kern_return_t kr = task_get_exception_ports(mach_task_self(), EXC_MASK_CRASH, exceptionMasks, &numExceptionMasks, exceptionHandlers, exceptionBehaviors, exceptionFlavors); 48 if (kr != KERN_SUCCESS) { 49 ASSERT_NOT_REACHED(); 50 return MACH_PORT_NULL; 51 } 52 53 // We're just interested in the first exception handler. 54 return exceptionHandlers[0]; 55 } 56 setMachExceptionPort(mach_port_t exceptionPort)57 void setMachExceptionPort(mach_port_t exceptionPort) 58 { 59 // Assert that we dont try to call setMachExceptionPort more than once per process. 60 #if !ASSERT_DISABLED 61 static mach_port_t taskExceptionPort = MACH_PORT_NULL; 62 ASSERT(taskExceptionPort == MACH_PORT_NULL); 63 taskExceptionPort = exceptionPort; 64 #endif 65 66 if (task_set_exception_ports(mach_task_self(), EXC_MASK_CRASH, exceptionPort, EXCEPTION_STATE_IDENTITY | MACH_EXCEPTION_CODES, MACHINE_THREAD_STATE) != KERN_SUCCESS) 67 ASSERT_NOT_REACHED(); 68 } 69