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53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
//===--- mach_helpers.h - Reflection testing: Mach Messages ---------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines some helper functions for connecting to a child process
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// on OS X in order to read directly from its memory during reflection tests.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_REFLECTION_TEST_MACH_HELPERS_H
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#define SWIFT_REFLECTION_TEST_MACH_HELPERS_H
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#include <mach/mach.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "mach_messages.h"
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static inline uint64_t extractUInt64(mach_msg_type_descriptor_t type_desc) {
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return (type_desc.pad1 + ((uint64_t)type_desc.pad2 << 32));
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}
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static inline void guardMachError(kern_return_t error, const char *message) {
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if (error == KERN_SUCCESS) return;
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fprintf(stderr, "%s failed: %s\n", message, mach_error_string(error));
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abort();
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}
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static inline uint64_t receive_uint64_t(mach_port_t from_port) {
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ReceiveUInt64Message message;
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kern_return_t error = mach_msg(&message.header,
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MACH_RCV_MSG | MACH_RCV_INTERRUPT,
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0,
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sizeof(message),
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from_port,
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MACH_MSG_TIMEOUT_NONE,
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MACH_PORT_NULL);
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guardMachError(error, "mach_msg (MACH_RCV_MSG)");
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return extractUInt64(message.value);
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}
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#endif // SWIFT_REFLECTION_TEST_MACH_HELPERS_H
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