Merge WebKit at r75993: Initial merge by git.

Change-Id: I602bbdc3974787a3b0450456a30a7868286921c3

1 files changed, 67 insertions, 0 deletions

diff --git a/Source/WebKit2/Platform/mac/MachUtilities.cpp b/Source/WebKit2/Platform/mac/MachUtilities.cpp
new file mode 100644
index 0000000..edb17dc
--- /dev/null
+++ b/Source/WebKit2/Platform/mac/MachUtilities.cpp
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "MachUtilities.h"
+
+#include <mach/task.h>
+
+void setMachPortQueueLength(mach_port_t receivePort, mach_port_msgcount_t queueLength)
+{
+    mach_port_limits_t portLimits;
+    portLimits.mpl_qlimit = queueLength;
+
+    mach_port_set_attributes(mach_task_self(), receivePort, MACH_PORT_LIMITS_INFO, reinterpret_cast<mach_port_info_t>(&portLimits), MACH_PORT_LIMITS_INFO_COUNT);
+}
+
+mach_port_t machExceptionPort()
+{
+    exception_mask_t exceptionMasks[EXC_TYPES_COUNT];
+    exception_port_t exceptionHandlers[EXC_TYPES_COUNT];
+    exception_behavior_t exceptionBehaviors[EXC_TYPES_COUNT];
+    thread_state_flavor_t exceptionFlavors[EXC_TYPES_COUNT];
+    mach_msg_type_number_t numExceptionMasks;
+
+    kern_return_t kr = task_get_exception_ports(mach_task_self(), EXC_MASK_CRASH, exceptionMasks, &numExceptionMasks, exceptionHandlers, exceptionBehaviors, exceptionFlavors);
+    if (kr != KERN_SUCCESS) {
+        ASSERT_NOT_REACHED();
+        return MACH_PORT_NULL;
+    }
+
+    // We're just interested in the first exception handler.
+    return exceptionHandlers[0];
+}
+
+void setMachExceptionPort(mach_port_t exceptionPort)
+{
+    // Assert that we dont try to call setMachExceptionPort more than once per process.
+#if !ASSERT_DISABLED
+    static mach_port_t taskExceptionPort = MACH_PORT_NULL;
+    ASSERT(taskExceptionPort == MACH_PORT_NULL);
+    taskExceptionPort = exceptionPort;
+#endif
+
+    if (task_set_exception_ports(mach_task_self(), EXC_MASK_CRASH, exceptionPort, EXCEPTION_STATE_IDENTITY | MACH_EXCEPTION_CODES, MACHINE_THREAD_STATE) != KERN_SUCCESS)
+        ASSERT_NOT_REACHED();
+}