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SILGen: Avoid expanding #line directives with invalid source locations.

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Synthesized stub constructors contain `#line` directives and under certain
circumstances these directives can have invalid source locations. SILGen would
trigger an assert (or invoke UB in non-asserts builds) when attempting to
expand these directives into literal values. Check the source location for
validity before translating the location to a location in the outermost source
file.

Resolves rdar://121971741
This commit is contained in:
Allan Shortlidge
2024-02-20 20:07:13 -08:00
parent 6a86bf3464
commit cf3031794f
3 changed files with 32 additions and 6 deletions
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13
test/SILGen/objc_implementation.swift Normal file
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// RUN: %target-swift-frontend -emit-silgen -import-objc-header %S/Inputs/objc_implementation.h -swift-version 5 %s | %FileCheck %s
// REQUIRES: objc_interop
@_objcImplementation extension ImplClass {
public init(int: Int) {
super.init()
}
// CHECK-LABEL: sil{{.*}} @$sSo9ImplClassC19objc_implementationEABycfc : $@convention(method) (@owned ImplClass) -> @owned ImplClass {
// CHECK: function_ref @$ss25_unimplementedInitializer9className04initD04file4line6columns5NeverOs12StaticStringV_A2JS2utF
// CHECK: } // end sil function '$sSo9ImplClassC19objc_implementationEABycfc'
}