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https://github.com/apple/swift.git
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147 lines
4.8 KiB
Swift
147 lines
4.8 KiB
Swift
//===----------------------------------------------------------------------===//
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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 - 2015 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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// Implementation Note: this file intentionally uses very LOW-LEVEL
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// CONSTRUCTS, so that assert and fatal may be used liberally in
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// building library abstractions without fear of infinite recursion.
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//
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// FIXME: We could go farther with this simplification, e.g. avoiding
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// UnsafeMutablePointer
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@transparent internal
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func _isDebugAssertConfiguration() -> Bool {
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// The values for the assert_configuration call are:
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// 0: Debug
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// 1: Release
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// 2: Fast
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return Int32(Builtin.assert_configuration()) == 0
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}
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@transparent internal
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func _isReleaseAssertConfiguration() -> Bool {
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// The values for the assert_configuration call are:
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// 0: Debug
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// 1: Release
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// 2: Fast
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return Int32(Builtin.assert_configuration()) == 1
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}
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@transparent internal
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func _isFastAssertConfiguration() -> Bool {
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// The values for the assert_configuration call are:
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// 0: Debug
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// 1: Release
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// 2: Fast
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return Int32(Builtin.assert_configuration()) == 2
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}
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@asmname("swift_reportFatalErrorInFile")
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func _reportFatalErrorInFile(
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prefix: UnsafePointer<UInt8>, prefixLength: UWord,
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message: UnsafePointer<UInt8>, messageLength: UWord,
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file: UnsafePointer<UInt8>, fileLength: UWord,
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line: UWord)
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@asmname("swift_reportFatalError")
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func _reportFatalError(
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prefix: UnsafePointer<UInt8>, prefixLength: UWord,
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message: UnsafePointer<UInt8>, messageLength: UWord)
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@asmname("swift_reportUnimplementedInitializerInFile")
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func _reportUnimplementedInitializerInFile(
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className: UnsafePointer<UInt8>, classNameLength: UWord,
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initName: UnsafePointer<UInt8>, initNameLength: UWord,
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file: UnsafePointer<UInt8>, fileLength: UWord,
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line: UWord, column: UWord)
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@asmname("swift_reportUnimplementedInitializer")
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func _reportUnimplementedInitializer(
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className: UnsafePointer<UInt8>, classNameLength: UWord,
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initName: UnsafePointer<UInt8>, initNameLength: UWord)
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/// This function should be used only in the implementation of user-level
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/// assertions.
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@noreturn
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func _assertionFailed(
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prefix: StaticString, message: StaticString,
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file: StaticString, line: UWord
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) {
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_reportFatalErrorInFile(
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prefix.start, prefix.byteSize, message.start, message.byteSize,
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file.start, file.byteSize, line)
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Builtin.int_trap()
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}
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/// This function should be used only in the implementation of user-level
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/// assertions.
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@noreturn
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func _assertionFailed(
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prefix: StaticString, message: String,
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file: StaticString, line: UWord
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) {
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let messageUTF8 = message.nulTerminatedUTF8
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messageUTF8.withUnsafeBufferPointer {
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(messageUTF8) in
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_reportFatalErrorInFile(
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prefix.start, prefix.byteSize,
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messageUTF8.baseAddress, UWord(messageUTF8.count),
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file.start, file.byteSize, line)
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}
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Builtin.int_trap()
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}
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/// This function should be used only in the implementation of stdlib
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/// assertions.
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@transparent @noreturn internal
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func _fatalErrorMessage(prefix: StaticString, message: StaticString,
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file: StaticString, line: UWord) {
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#if INTERNAL_CHECKS_ENABLED
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_reportFatalErrorInFile(
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prefix.start, prefix.byteSize, message.start, message.byteSize,
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file.start, file.byteSize, line)
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#else
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_reportFatalError(prefix.start, prefix.byteSize,
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message.start, message.byteSize)
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#endif
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Builtin.int_trap()
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}
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/// Prints a fatal error message when a unimplemented initializer gets
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/// called by the Objective-C runtime.
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@transparent @noreturn internal
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func _unimplemented_initializer(className: StaticString,
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initName: StaticString = __FUNCTION__,
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file: StaticString = __FILE__,
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line: UWord = __LINE__,
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column: UWord = __COLUMN__) {
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// This function is marked @transparent so that it is inlined into the caller
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// (the initializer stub), and, depending on the build configuration,
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// redundant parameter values (__FILE__ etc.) are eliminated, and don't leak
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// information about the user's source.
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if _isDebugAssertConfiguration() {
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_reportUnimplementedInitializerInFile(
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className.start, className.byteSize,
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initName.start, initName.byteSize,
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file.start, file.byteSize, line, column)
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} else {
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_reportUnimplementedInitializer(
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className.start, className.byteSize,
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initName.start, initName.byteSize)
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}
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Builtin.int_trap()
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}
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