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reflect,runtime: assume register ABI with GOEXPERIMENT=regabiargs
This change causes finalizers, reflect calls, and Windows syscall callbacks to assume the register ABI when GOEXPERIMENT=regabiargs is set. That is, when all Go functions are using the new ABI by default, these features should assume the new ABI too. For #40724. Change-Id: Ie4ee66b8085b692e1ff675f01134c9a4703ae1b9 Reviewed-on: https://go-review.googlesource.com/c/go/+/306571 Trust: Michael Knyszek <mknyszek@google.com> Run-TryBot: Michael Knyszek <mknyszek@google.com> Reviewed-by: Austin Clements <austin@google.com> Reviewed-by: Cherry Zhang <cherryyz@google.com> Reviewed-by: Than McIntosh <thanm@google.com> TryBot-Result: Go Bot <gobot@golang.org>
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@ -28,9 +28,9 @@ import (
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// commented out there should be the actual values once
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// we're ready to use the register ABI everywhere.
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var (
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intArgRegs = 0 // abi.IntArgRegs
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floatArgRegs = 0 // abi.FloatArgRegs
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floatRegSize = uintptr(0) // uintptr(abi.EffectiveFloatRegSize)
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intArgRegs = abi.IntArgRegs * experimentRegabiArgs
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floatArgRegs = abi.FloatArgRegs * experimentRegabiArgs
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floatRegSize = uintptr(abi.EffectiveFloatRegSize * experimentRegabiArgs)
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)
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// abiStep represents an ABI "instruction." Each instruction
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10
src/reflect/regabiargs_off.go
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10
src/reflect/regabiargs_off.go
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@ -0,0 +1,10 @@
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// Copyright 2021 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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//go:build !goexperiment.regabiargs
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// +build !goexperiment.regabiargs
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package reflect
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const experimentRegabiArgs = 0
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src/reflect/regabiargs_on.go
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10
src/reflect/regabiargs_on.go
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@ -0,0 +1,10 @@
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// Copyright 2021 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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//go:build goexperiment.regabiargs
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// +build goexperiment.regabiargs
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package reflect
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const experimentRegabiArgs = 1
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src/runtime/regabiargs_off.go
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10
src/runtime/regabiargs_off.go
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@ -0,0 +1,10 @@
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// Copyright 2021 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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//go:build !goexperiment.regabiargs
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// +build !goexperiment.regabiargs
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package runtime
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const experimentRegabiArgs = 0
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src/runtime/regabiargs_on.go
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10
src/runtime/regabiargs_on.go
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@ -0,0 +1,10 @@
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// Copyright 2021 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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//go:build goexperiment.regabiargs
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// +build goexperiment.regabiargs
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package runtime
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const experimentRegabiArgs = 1
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@ -423,4 +423,4 @@ func sigpanic0()
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// everywhere.
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//
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// Protected by finlock.
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var intArgRegs = 0 // abi.IntArgRegs
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var intArgRegs = abi.IntArgRegs * experimentRegabiArgs
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