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d3e43bbe7b
In C++, a field of a derived class might be placed into the tail padding of a base class. Swift was not handling this case correctly, causing an asserts-disabled compiler to run out of RAM, and an asserts-enabled compiler to fail with an assertion. Fixes this IRGen assertion: ``` Assertion failed: (offset >= NextOffset && "adding fields out of order"), function addField, file GenStruct.cpp, line 1509. ``` rdar://138764929
128 lines
3.4 KiB
Swift
128 lines
3.4 KiB
Swift
// RUN: %target-run-simple-swift(-I %S/Inputs/ -Xfrontend -enable-experimental-cxx-interop)
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//
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// REQUIRES: executable_test
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import StdlibUnittest
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import Fields
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var FieldsTestSuite = TestSuite("Getting and setting fields in base classes")
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struct SwiftStructWrapper {
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let value: DerivedFromOneField
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}
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func optionalDerivedFromAll() -> DerivedFromAll? { DerivedFromAll() }
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FieldsTestSuite.test("Fields from derived from all") {
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let derived = DerivedFromAll()
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expectEqual(derived.a, 1)
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expectEqual(derived.b, 2)
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expectEqual(derived.c, 3)
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expectEqual(derived.d, 4)
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expectEqual(derived.e, 5)
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expectEqual(derived.f, 6)
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var mutable = DerivedFromAll()
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mutable.a = 42
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mutable.d = 44
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mutable.e = 46
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mutable.f = 48
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expectEqual(mutable.a, 42)
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expectEqual(mutable.d, 44)
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expectEqual(mutable.e, 46)
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expectEqual(mutable.f, 48)
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}
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FieldsTestSuite.test("Optional") {
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let derived = optionalDerivedFromAll()
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expectEqual(derived!.a, 1)
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expectEqual(derived!.b, 2)
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expectEqual(derived!.c, 3)
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expectEqual(derived!.d, 4)
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expectEqual(derived!.e, 5)
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expectEqual(derived!.f, 6)
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}
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FieldsTestSuite.test("Struct holding derived from one field") {
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let derived = DerivedFromOneField()
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let s = SwiftStructWrapper(value: derived)
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expectEqual(s.value.value, 42)
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}
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FieldsTestSuite.test("Fields from derived from non trivial") {
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let derived = NonTrivialDerivedFromAll()
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expectEqual(derived.a, 1)
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expectEqual(derived.b, 2)
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expectEqual(derived.c, 3)
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expectEqual(derived.d, 4)
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expectEqual(derived.e, 5)
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expectEqual(derived.f, 6)
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var mutable = NonTrivialDerivedFromAll()
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mutable.a = 42
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mutable.d = 44
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mutable.e = 46
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mutable.f = 48
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expectEqual(mutable.a, 42)
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expectEqual(mutable.d, 44)
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expectEqual(mutable.e, 46)
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expectEqual(mutable.f, 48)
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}
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FieldsTestSuite.test("Derived from class template") {
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var derived = DerivedFromClassTemplate()
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derived.value = 42
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expectEqual(derived.value, 42)
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}
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FieldsTestSuite.test("Same field from derived") {
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var derived = DerivedWithSameField()
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derived.a = 42
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expectEqual(derived.a, 42)
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}
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extension CopyTrackedBaseClass {
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var swiftProp: CInt {
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return x
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}
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}
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FieldsTestSuite.test("Get field without copying base in the getter accessor") {
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let base = CopyTrackedBaseClass(0)
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var copyCounter = getCopyCounter().pointee
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expectEqual(base.swiftProp, 0)
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// Measure copy counter of a regular
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// property access for a C++ type to compare
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// it to see if any additional copies are
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// needed to access the property from the base class.
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let expectedCopyCountDiff = getCopyCounter().pointee - copyCounter
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let derived = CopyTrackedDerivedClass(234)
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copyCounter = getCopyCounter().pointee
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expectEqual(derived.x, 234)
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expectEqual(copyCounter, getCopyCounter().pointee - expectedCopyCountDiff)
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let derivedDerived = CopyTrackedDerivedDerivedClass(-11)
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copyCounter = getCopyCounter().pointee
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expectEqual(derivedDerived.x, -11)
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expectEqual(copyCounter, getCopyCounter().pointee - expectedCopyCountDiff)
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}
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FieldsTestSuite.test("Structs with virtual methods") {
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var derived = InheritFromStructsWithVirtualMethod()
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derived.d = 42
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expectEqual(derived.d, 42)
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}
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FieldsTestSuite.test("Field in tail padding of base class") {
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let usesBaseTailPadding = DerivedUsesBaseTailPadding()
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expectEqual(usesBaseTailPadding.field2, 789)
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expectEqual(usesBaseTailPadding.field4, 456)
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expectEqual(usesBaseTailPadding.field8, 123)
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}
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runAllTests()
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