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9a8372f8bd
The previous CL introduced stack objects. This CL removes the old ambiguously live liveness analysis. After this CL we're relying on stack objects exclusively. Update a bunch of liveness tests to reflect the new world. Fixes #22350 Change-Id: I739b26e015882231011ce6bc1a7f426049e59f31 Reviewed-on: https://go-review.googlesource.com/c/134156 Reviewed-by: Austin Clements <austin@google.com> Reviewed-by: Cherry Zhang <cherryyz@google.com>
44 lines
1.6 KiB
Go
44 lines
1.6 KiB
Go
// errorcheck -0 -m -live
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// Copyright 2016 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 uintptrescapes functions.
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package p
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import (
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"unsafe"
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)
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//go:uintptrescapes
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//go:noinline
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func F1(a uintptr) {} // ERROR "escaping uintptr"
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//go:uintptrescapes
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//go:noinline
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func F2(a ...uintptr) {} // ERROR "escaping ...uintptr" "a does not escape"
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//go:uintptrescapes
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//go:noinline
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func F3(uintptr) {} // ERROR "escaping uintptr"
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//go:uintptrescapes
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//go:noinline
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func F4(...uintptr) {} // ERROR "escaping ...uintptr"
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func G() {
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var t int // ERROR "moved to heap"
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F1(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to F1: .?autotmp" "&t escapes to heap" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
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var t2 int // ERROR "moved to heap"
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F3(uintptr(unsafe.Pointer(&t2))) // ERROR "live at call to F3: .?autotmp" "&t2 escapes to heap" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
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}
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func H() {
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var v int // ERROR "moved to heap"
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F2(0, 1, uintptr(unsafe.Pointer(&v)), 2) // ERROR "live at call to newobject: .?autotmp" "live at call to F2: .?autotmp" "escapes to heap" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
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var v2 int // ERROR "moved to heap"
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F4(0, 1, uintptr(unsafe.Pointer(&v2)), 2) // ERROR "live at call to newobject: .?autotmp" "live at call to F4: .?autotmp" "escapes to heap" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
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}
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