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3ed3774e07
This not only restores the correct behavior for classes with generic ancestry, but also handles actual generic classes as well. (This is the function that backs Foundation's Bundle.init(for: AnyClass) initializer.) https://bugs.swift.org/browse/SR-1917 rdar://problem/33450609&40367300
62 lines
2.4 KiB
Swift
62 lines
2.4 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: %target-build-swift -emit-library -o %t/libSimpleNSObjectSubclass.dylib %S/Inputs/SimpleNSObjectSubclass.swift
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// RUN: %target-codesign %t/libSimpleNSObjectSubclass.dylib
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// RUN: %target-build-swift %s -o %t/main -lSimpleNSObjectSubclass -L%t -import-objc-header %S/Inputs/class_getImageName-static-helper.h
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// RUN: %target-run %t/main %t/libSimpleNSObjectSubclass.dylib
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// REQUIRES: executable_test
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// REQUIRES: objc_interop
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import Darwin
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import ObjectiveC
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// import SimpleNSObjectSubclass // Deliberately omitted in favor of dynamic loads.
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// Note: The following typealias uses AnyObject instead of AnyClass so that the
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// function type is trivially bridgeable to Objective-C. (The representation of
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// AnyClass is not the same as Objective-C's 'Class' type.)
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typealias GetImageHook = @convention(c) (AnyObject, UnsafeMutablePointer<UnsafePointer<CChar>?>) -> ObjCBool
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var hook: GetImageHook?
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func checkThatSwiftHookWasNotInstalled() {
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// Check that the Swift hook did not get installed.
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guard let setHookPtr = dlsym(UnsafeMutableRawPointer(bitPattern: -2),
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getHookName()) else {
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// If the version of the ObjC runtime we're using doesn't have the hook,
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// we're good.
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return
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}
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let setHook = unsafeBitCast(setHookPtr, to: (@convention(c) (GetImageHook, UnsafeMutablePointer<GetImageHook?>) -> Void).self)
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setHook({ hook!($0, $1) }, &hook)
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var info: Dl_info = .init()
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guard 0 != dladdr(unsafeBitCast(hook, to: UnsafeRawPointer.self), &info) else {
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fatalError("could not get dladdr info for objc_hook_getImageName")
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}
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precondition(String(cString: info.dli_fname).hasSuffix("libobjc.A.dylib"),
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"hook was replaced")
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}
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// It's important that this test does not register any Swift classes with the
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// Objective-C runtime---that's where Swift sets up its custom hook, and we want
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// to check the behavior /without/ that hook. That includes the buffer types for
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// String and Array. Therefore, we get C strings directly from a bridging
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// header.
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guard let theClass = objc_getClass(getNameOfClassToFind()) as! AnyClass? else {
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fatalError("could not find class")
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}
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guard let imageName = class_getImageName(theClass) else {
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fatalError("could not find image")
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}
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checkThatSwiftHookWasNotInstalled()
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// Okay, now we can use String.
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precondition(String(cString: imageName).hasSuffix("libSimpleNSObjectSubclass.dylib"),
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"found wrong image")
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