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0664c3f333
Add a distinct hook for `swift_willThrowTypedImpl()`. This PR adds a hook for `swift_willThrowTypedImpl()` that is distinct from `swift_willThrow()`. The current implementation of `swift_willThrowTypedImpl()` creates a temporary existential box for the thrown error and calls the `_swift_willThrow` hook that is set by XCTest and swift-testing. Unfortunately, this temporary existential box isn't very useful because its address is not expected to be stable. Instead, expose a separate hook, `_swift_willThrowTypedImpl`, whose signature matches that of the new ABI function. This hook can then be used by XCTest and swift-testing to distinguish between typed throws and untyped throws and avoids creating a temporary existential box when it won't be useful. As implemented, if `_swift_willThrowTypedImpl` is not set but `_swift_willThrow` is, the `swift_willThrowTypedImpl()` will fall back to calling `_swift_willThrow` with a temporary existential box. We might decide this is unnecessary, but I figured it would allow us more time to stage adoption of the new hook in the testing libraries. Resolves rdar://122824443.
42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
//===--- ErrorObjectTestSupport.h - Support for Instruments.app -*- C++ -*-===//
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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 - 2019 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 https://swift.org/LICENSE.txt for license information
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// See https://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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// Swift runtime support for tests involving errors.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_RUNTIME_ERROROBJECT_TEST_SUPPORT_H
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#define SWIFT_RUNTIME_ERROROBJECT_TEST_SUPPORT_H
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#include <atomic>
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namespace swift {
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#if defined(__cplusplus)
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SWIFT_RUNTIME_EXPORT std::atomic<void (*)(SwiftError *error)> _swift_willThrow;
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SWIFT_RUNTIME_EXPORT std::atomic<void (*)(
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OpaqueValue *value,
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const Metadata *type,
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const WitnessTable *errorConformance
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)> _swift_willThrowTypedImpl;
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#endif
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/// Set the value of @c _swift_willThrow atomically.
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///
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/// This function is present for use by the standard library's test suite only.
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SWIFT_CC(swift)
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SWIFT_RUNTIME_STDLIB_SPI
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void _swift_setWillThrowHandler(void (* handler)(SwiftError *error));
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}
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#endif
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