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For functions that call reflect.Type.Method (or MethodByName), we mark it as REFLECTMETHOD, which tells the linker that methods can be retrieved via reflection and the linker keeps all exported methods live. Currently, this marking expects exactly the interface call reflect.Type.Method (or MethodByName). But now the compiler can devirtualize that call to a concrete call reflect.(*rtype).Method (or MethodByName), which is not handled and causing the linker to discard methods too aggressively. Handle the latter in this CL. Fixes #44207. Change-Id: Ia4060472dbff6ab6a83d2ca8e60a3e3f180ee832 Reviewed-on: https://go-review.googlesource.com/c/go/+/290950 Trust: Cherry Zhang <cherryyz@google.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
25 lines
417 B
Go
25 lines
417 B
Go
// run
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// Copyright 2021 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// See issue 44207.
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package main
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import "reflect"
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type S int
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func (s S) M() {}
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func main() {
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t := reflect.TypeOf(S(0))
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fn, ok := reflect.PtrTo(t).MethodByName("M")
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if !ok {
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panic("FAIL")
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}
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fn.Func.Call([]reflect.Value{reflect.New(t)})
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}
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