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a6f3f8d973
Change-Id: I68538a50c22b02cdb5aa2a889f9440fed7b94c54
GitHub-Last-Rev: aaac9e7834
GitHub-Pull-Request: golang/go#52944
Reviewed-on: https://go-review.googlesource.com/c/go/+/406835
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
64 lines
2 KiB
Go
64 lines
2 KiB
Go
// errorcheck -0 -m -live -std
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// +build !windows,!js
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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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