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319b75ed33
Fixes #58141 Co-authored-by: Richard Musiol <neelance@gmail.com> Co-authored-by: Achille Roussel <achille.roussel@gmail.com> Co-authored-by: Julien Fabre <ju.pryz@gmail.com> Co-authored-by: Evan Phoenix <evan@phx.io> Change-Id: I49b66946acc90fdf09ed9223096bfec9a1e5b923 Reviewed-on: https://go-review.googlesource.com/c/go/+/479627 Run-TryBot: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Auto-Submit: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com> Auto-Submit: Ian Lance Taylor <iant@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com> TryBot-Bypass: Ian Lance Taylor <iant@golang.org>
64 lines
2 KiB
Go
64 lines
2 KiB
Go
// errorcheck -0 -m -live -std
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// +build !windows,!js,!wasip1
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// Copyright 2015 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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// Test escape analysis and liveness inferred for uintptrkeepalive functions.
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//
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// This behavior is enabled automatically for function declarations with no
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// bodies (assembly, linkname), as well as explicitly on complete functions
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// with //go:uintptrkeepalive.
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//
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// This is most important for syscall.Syscall (and similar functions), so we
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// test it explicitly.
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package p
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import (
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"syscall"
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"unsafe"
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)
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func implicit(uintptr) // ERROR "assuming arg#1 is unsafe uintptr"
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//go:uintptrkeepalive
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//go:nosplit
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func explicit(uintptr) {
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}
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func autotmpImplicit() { // ERROR "can inline autotmpImplicit"
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var t int
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implicit(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to implicit: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
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}
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func autotmpExplicit() { // ERROR "can inline autotmpExplicit"
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var t int
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explicit(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to explicit: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
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}
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func autotmpSyscall() { // ERROR "can inline autotmpSyscall"
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var v int
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syscall.Syscall(0, 1, uintptr(unsafe.Pointer(&v)), 2) // ERROR "live at call to Syscall: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
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}
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func localImplicit() { // ERROR "can inline localImplicit"
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var t int
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p := unsafe.Pointer(&t)
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implicit(uintptr(p)) // ERROR "live at call to implicit: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
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}
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func localExplicit() { // ERROR "can inline localExplicit"
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var t int
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p := unsafe.Pointer(&t)
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explicit(uintptr(p)) // ERROR "live at call to explicit: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
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}
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func localSyscall() { // ERROR "can inline localSyscall"
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var v int
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p := unsafe.Pointer(&v)
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syscall.Syscall(0, 1, uintptr(p), 2) // ERROR "live at call to Syscall: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
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}
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