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https://github.com/golang/go
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76a615b20a
Before generating wrapper function, turn any f(a, b, []T{c, d, e}...)
calls back into f(a, b, c, d, e). This allows the existing code for
recognizing and specially handling unsafe.Pointer->uintptr conversions
to correctly handle variadic arguments too.
Fixes #41460.
Change-Id: I0a1255abdd1bd5dafd3e89547aedd4aec878394c
Reviewed-on: https://go-review.googlesource.com/c/go/+/263297
Trust: Matthew Dempsky <mdempsky@google.com>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
66 lines
1.3 KiB
Go
66 lines
1.3 KiB
Go
// run
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// Copyright 2020 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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// This test makes sure unsafe-uintptr arguments are handled correctly.
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package main
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import (
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"runtime"
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"unsafe"
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)
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var done = make(chan bool, 1)
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func setup() unsafe.Pointer {
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s := "ok"
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runtime.SetFinalizer(&s, func(p *string) { *p = "FAIL" })
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return unsafe.Pointer(&s)
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}
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//go:noinline
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//go:uintptrescapes
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func test(s string, p, q uintptr, rest ...uintptr) int {
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runtime.GC()
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runtime.GC()
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if *(*string)(unsafe.Pointer(p)) != "ok" {
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panic(s + ": p failed")
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}
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if *(*string)(unsafe.Pointer(q)) != "ok" {
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panic(s + ": q failed")
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}
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for _, r := range rest {
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if *(*string)(unsafe.Pointer(r)) != "ok" {
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panic(s + ": r[i] failed")
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}
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}
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done <- true
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return 0
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}
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//go:noinline
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func f() int {
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return test("return", uintptr(setup()), uintptr(setup()), uintptr(setup()), uintptr(setup()))
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}
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func main() {
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test("normal", uintptr(setup()), uintptr(setup()), uintptr(setup()), uintptr(setup()))
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<-done
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go test("go", uintptr(setup()), uintptr(setup()), uintptr(setup()), uintptr(setup()))
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<-done
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func() {
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defer test("defer", uintptr(setup()), uintptr(setup()), uintptr(setup()), uintptr(setup()))
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}()
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<-done
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f()
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<-done
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}
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