| // errorcheck -0 -m -live -std |
| |
| // +build !windows,!js,!wasip1 |
| |
| // Copyright 2015 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // Test escape analysis and liveness inferred for uintptrkeepalive functions. |
| // |
| // This behavior is enabled automatically for function declarations with no |
| // bodies (assembly, linkname), as well as explicitly on complete functions |
| // with //go:uintptrkeepalive. |
| // |
| // This is most important for syscall.Syscall (and similar functions), so we |
| // test it explicitly. |
| |
| package p |
| |
| import ( |
| "syscall" |
| "unsafe" |
| ) |
| |
| func implicit(uintptr) // ERROR "assuming arg#1 is unsafe uintptr" |
| |
| //go:uintptrkeepalive |
| //go:nosplit |
| func explicit(uintptr) { |
| } |
| |
| func autotmpImplicit() { // ERROR "can inline autotmpImplicit" |
| var t int |
| implicit(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to implicit: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$" |
| } |
| |
| func autotmpExplicit() { // ERROR "can inline autotmpExplicit" |
| var t int |
| explicit(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to explicit: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$" |
| } |
| |
| func autotmpSyscall() { // ERROR "can inline autotmpSyscall" |
| var v int |
| syscall.Syscall(0, 1, uintptr(unsafe.Pointer(&v)), 2) // ERROR "live at call to Syscall: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$" |
| } |
| |
| func localImplicit() { // ERROR "can inline localImplicit" |
| var t int |
| p := unsafe.Pointer(&t) |
| implicit(uintptr(p)) // ERROR "live at call to implicit: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$" |
| } |
| |
| func localExplicit() { // ERROR "can inline localExplicit" |
| var t int |
| p := unsafe.Pointer(&t) |
| explicit(uintptr(p)) // ERROR "live at call to explicit: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$" |
| } |
| |
| func localSyscall() { // ERROR "can inline localSyscall" |
| var v int |
| p := unsafe.Pointer(&v) |
| syscall.Syscall(0, 1, uintptr(p), 2) // ERROR "live at call to Syscall: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$" |
| } |