mirror of
https://github.com/golang/go
synced 2024-11-11 20:50:23 -07:00
internal/goexperiment: consolidate experiment-enabled constants
Currently, we have boolean and integral constants for GOEXPERIMENTs in various places. Consolidate these into automatically generated constants in the internal/goexperiment package. Change-Id: I42a49aba2a3b4c722fedea23a613162cd8a67bee Reviewed-on: https://go-review.googlesource.com/c/go/+/307818 Trust: Austin Clements <austin@google.com> Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
parent
6304b401e4
commit
b675e52e95
@ -71,7 +71,7 @@ var depsRules = `
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# No dependencies allowed for any of these packages.
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NONE
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< container/list, container/ring,
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internal/cfg, internal/cpu,
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internal/cfg, internal/cpu, internal/goexperiment,
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internal/goversion, internal/nettrace,
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unicode/utf8, unicode/utf16, unicode,
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unsafe;
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@ -81,7 +81,7 @@ var depsRules = `
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< internal/abi;
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# RUNTIME is the core runtime group of packages, all of them very light-weight.
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internal/abi, internal/cpu, unsafe
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internal/abi, internal/cpu, internal/goexperiment, unsafe
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< internal/bytealg
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< internal/itoa
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< internal/unsafeheader
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9
src/internal/goexperiment/exp_fieldtrack_off.go
Normal file
9
src/internal/goexperiment/exp_fieldtrack_off.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build !goexperiment.fieldtrack
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// +build !goexperiment.fieldtrack
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package goexperiment
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const FieldTrack = false
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const FieldTrackInt = 0
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9
src/internal/goexperiment/exp_fieldtrack_on.go
Normal file
9
src/internal/goexperiment/exp_fieldtrack_on.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build goexperiment.fieldtrack
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// +build goexperiment.fieldtrack
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package goexperiment
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const FieldTrack = true
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const FieldTrackInt = 1
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9
src/internal/goexperiment/exp_preemptibleloops_off.go
Normal file
9
src/internal/goexperiment/exp_preemptibleloops_off.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build !goexperiment.preemptibleloops
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// +build !goexperiment.preemptibleloops
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package goexperiment
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const PreemptibleLoops = false
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const PreemptibleLoopsInt = 0
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9
src/internal/goexperiment/exp_preemptibleloops_on.go
Normal file
9
src/internal/goexperiment/exp_preemptibleloops_on.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build goexperiment.preemptibleloops
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// +build goexperiment.preemptibleloops
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package goexperiment
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const PreemptibleLoops = true
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const PreemptibleLoopsInt = 1
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9
src/internal/goexperiment/exp_regabi_off.go
Normal file
9
src/internal/goexperiment/exp_regabi_off.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build !goexperiment.regabi
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// +build !goexperiment.regabi
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package goexperiment
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const Regabi = false
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const RegabiInt = 0
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9
src/internal/goexperiment/exp_regabi_on.go
Normal file
9
src/internal/goexperiment/exp_regabi_on.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build goexperiment.regabi
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// +build goexperiment.regabi
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package goexperiment
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const Regabi = true
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const RegabiInt = 1
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9
src/internal/goexperiment/exp_regabiargs_off.go
Normal file
9
src/internal/goexperiment/exp_regabiargs_off.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build !goexperiment.regabiargs
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// +build !goexperiment.regabiargs
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package goexperiment
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const RegabiArgs = false
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const RegabiArgsInt = 0
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9
src/internal/goexperiment/exp_regabiargs_on.go
Normal file
9
src/internal/goexperiment/exp_regabiargs_on.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build goexperiment.regabiargs
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// +build goexperiment.regabiargs
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package goexperiment
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const RegabiArgs = true
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const RegabiArgsInt = 1
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9
src/internal/goexperiment/exp_regabidefer_off.go
Normal file
9
src/internal/goexperiment/exp_regabidefer_off.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build !goexperiment.regabidefer
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// +build !goexperiment.regabidefer
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package goexperiment
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const RegabiDefer = false
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const RegabiDeferInt = 0
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9
src/internal/goexperiment/exp_regabidefer_on.go
Normal file
9
src/internal/goexperiment/exp_regabidefer_on.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build goexperiment.regabidefer
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// +build goexperiment.regabidefer
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package goexperiment
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const RegabiDefer = true
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const RegabiDeferInt = 1
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9
src/internal/goexperiment/exp_regabig_off.go
Normal file
9
src/internal/goexperiment/exp_regabig_off.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build !goexperiment.regabig
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// +build !goexperiment.regabig
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package goexperiment
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const RegabiG = false
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const RegabiGInt = 0
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9
src/internal/goexperiment/exp_regabig_on.go
Normal file
9
src/internal/goexperiment/exp_regabig_on.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build goexperiment.regabig
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// +build goexperiment.regabig
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package goexperiment
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const RegabiG = true
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const RegabiGInt = 1
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9
src/internal/goexperiment/exp_regabireflect_off.go
Normal file
9
src/internal/goexperiment/exp_regabireflect_off.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build !goexperiment.regabireflect
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// +build !goexperiment.regabireflect
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package goexperiment
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const RegabiReflect = false
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const RegabiReflectInt = 0
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9
src/internal/goexperiment/exp_regabireflect_on.go
Normal file
9
src/internal/goexperiment/exp_regabireflect_on.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build goexperiment.regabireflect
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// +build goexperiment.regabireflect
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package goexperiment
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const RegabiReflect = true
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const RegabiReflectInt = 1
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9
src/internal/goexperiment/exp_regabiwrappers_off.go
Normal file
9
src/internal/goexperiment/exp_regabiwrappers_off.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build !goexperiment.regabiwrappers
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// +build !goexperiment.regabiwrappers
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package goexperiment
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const RegabiWrappers = false
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const RegabiWrappersInt = 0
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9
src/internal/goexperiment/exp_regabiwrappers_on.go
Normal file
9
src/internal/goexperiment/exp_regabiwrappers_on.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build goexperiment.regabiwrappers
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// +build goexperiment.regabiwrappers
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package goexperiment
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const RegabiWrappers = true
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const RegabiWrappersInt = 1
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9
src/internal/goexperiment/exp_staticlockranking_off.go
Normal file
9
src/internal/goexperiment/exp_staticlockranking_off.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build !goexperiment.staticlockranking
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// +build !goexperiment.staticlockranking
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package goexperiment
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const StaticLockRanking = false
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const StaticLockRankingInt = 0
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9
src/internal/goexperiment/exp_staticlockranking_on.go
Normal file
9
src/internal/goexperiment/exp_staticlockranking_on.go
Normal file
@ -0,0 +1,9 @@
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// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build goexperiment.staticlockranking
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// +build goexperiment.staticlockranking
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package goexperiment
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const StaticLockRanking = true
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const StaticLockRankingInt = 1
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@ -17,11 +17,12 @@
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// - Build tag goexperiment.x is set if experiment x (lower case) is
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// enabled.
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//
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// - For each experiment x (in camel case), this package contains a
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// boolean constant x and an integer constant xInt.
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//
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// - In runtime assembly, the macro GOEXPERIMENT_x is defined if
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// experiment x (lower case) is enabled.
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//
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// - TODO(austin): More to come.
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//
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// In the toolchain, the set of experiments enabled for the current
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// build should be accessed via objabi.Experiment.
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//
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@ -29,11 +30,15 @@
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// go doc internal/experiment.Flags.
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package goexperiment
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//go:generate go run mkconsts.go
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// Flags is the set of experiments that can be enabled or disabled in
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// the current toolchain.
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//
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// When specified in the GOEXPERIMENT environment variable or as build
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// tags, experiments use the strings.ToLower of their field name.
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//
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// If you change this struct definition, run "go generate".
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type Flags struct {
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FieldTrack bool
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PreemptibleLoops bool
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74
src/internal/goexperiment/mkconsts.go
Normal file
74
src/internal/goexperiment/mkconsts.go
Normal file
@ -0,0 +1,74 @@
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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 ignore
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// +build ignore
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// mkconsts generates const definition files for each GOEXPERIMENT.
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package main
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import (
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"bytes"
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"fmt"
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"internal/goexperiment"
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"log"
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"os"
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"reflect"
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"strings"
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)
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func main() {
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// Delete existing experiment constant files.
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ents, err := os.ReadDir(".")
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if err != nil {
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log.Fatal(err)
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}
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for _, ent := range ents {
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name := ent.Name()
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if !strings.HasPrefix(name, "exp_") {
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continue
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}
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// Check that this is definitely a generated file.
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data, err := os.ReadFile(name)
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if err != nil {
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log.Fatalf("reading %s: %v", name, err)
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}
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if !bytes.Contains(data, []byte("Code generated by mkconsts")) {
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log.Fatalf("%s: expected generated file", name)
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}
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if err := os.Remove(name); err != nil {
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log.Fatal(err)
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}
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}
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// Generate new experiment constant files.
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rt := reflect.TypeOf(&goexperiment.Flags{}).Elem()
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for i := 0; i < rt.NumField(); i++ {
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f := rt.Field(i).Name
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buildTag := "goexperiment." + strings.ToLower(f)
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for _, val := range []bool{false, true} {
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name := fmt.Sprintf("exp_%s_%s.go", strings.ToLower(f), pick(val, "off", "on"))
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data := fmt.Sprintf(`// Code generated by mkconsts.go. DO NOT EDIT.
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//go:build %s%s
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// +build %s%s
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package goexperiment
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const %s = %v
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const %sInt = %s
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`, pick(val, "!", ""), buildTag, pick(val, "!", ""), buildTag, f, val, f, pick(val, "0", "1"))
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if err := os.WriteFile(name, []byte(data), 0666); err != nil {
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log.Fatalf("writing %s: %v", name, err)
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}
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}
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}
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}
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func pick(v bool, f, t string) string {
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if v {
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return t
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}
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return f
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}
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@ -6,6 +6,7 @@ package reflect
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import (
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"internal/abi"
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"internal/goexperiment"
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"unsafe"
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)
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@ -28,9 +29,9 @@ 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 = abi.IntArgRegs * experimentRegabiArgs
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floatArgRegs = abi.FloatArgRegs * experimentRegabiArgs
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floatRegSize = uintptr(abi.EffectiveFloatRegSize * experimentRegabiArgs)
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intArgRegs = abi.IntArgRegs * goexperiment.RegabiArgsInt
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floatArgRegs = abi.FloatArgRegs * goexperiment.RegabiArgsInt
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floatRegSize = uintptr(abi.EffectiveFloatRegSize * goexperiment.RegabiArgsInt)
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)
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// abiStep represents an ABI "instruction." Each instruction
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@ -1,10 +0,0 @@
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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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@ -1,10 +0,0 @@
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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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@ -6,6 +6,7 @@ package runtime
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import (
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"internal/abi"
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"internal/goexperiment"
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"runtime/internal/atomic"
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"runtime/internal/sys"
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"unsafe"
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@ -228,7 +229,7 @@ func deferproc(siz int32, fn *funcval) { // arguments of fn follow fn
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throw("defer on system stack")
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}
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if experimentRegabiDefer && siz != 0 {
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if goexperiment.RegabiDefer && siz != 0 {
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// TODO: Make deferproc just take a func().
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throw("defer with non-empty frame")
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}
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@ -285,7 +286,7 @@ func deferprocStack(d *_defer) {
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// go code on the system stack can't defer
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throw("defer on system stack")
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}
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if experimentRegabiDefer && d.siz != 0 {
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if goexperiment.RegabiDefer && d.siz != 0 {
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throw("defer with non-empty frame")
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}
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// siz and fn are already set.
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@ -387,8 +388,8 @@ func deferArgs(d *_defer) unsafe.Pointer {
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// that experiment, we should change the type of d.fn.
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//go:nosplit
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func deferFunc(d *_defer) func() {
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if !experimentRegabiDefer {
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throw("requires experimentRegabiDefer")
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if !goexperiment.RegabiDefer {
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throw("requires GOEXPERIMENT=regabidefer")
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}
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var fn func()
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*(**funcval)(unsafe.Pointer(&fn)) = d.fn
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@ -648,7 +649,7 @@ func Goexit() {
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addOneOpenDeferFrame(gp, 0, nil)
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}
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} else {
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if experimentRegabiDefer {
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if goexperiment.RegabiDefer {
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// Save the pc/sp in deferCallSave(), so we can "recover" back to this
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// loop if necessary.
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deferCallSave(&p, deferFunc(d))
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@ -850,7 +851,7 @@ func runOpenDeferFrame(gp *g, d *_defer) bool {
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argWidth, fd = readvarintUnsafe(fd)
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closureOffset, fd = readvarintUnsafe(fd)
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nArgs, fd = readvarintUnsafe(fd)
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if experimentRegabiDefer && argWidth != 0 {
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if goexperiment.RegabiDefer && argWidth != 0 {
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throw("defer with non-empty frame")
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}
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if deferBits&(1<<i) == 0 {
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@ -878,7 +879,7 @@ func runOpenDeferFrame(gp *g, d *_defer) bool {
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deferBits = deferBits &^ (1 << i)
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*(*uint8)(unsafe.Pointer(d.varp - uintptr(deferBitsOffset))) = deferBits
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p := d._panic
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if experimentRegabiDefer {
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if goexperiment.RegabiDefer {
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deferCallSave(p, deferFunc(d))
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} else {
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reflectcallSave(p, unsafe.Pointer(closure), deferArgs, argWidth)
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@ -906,8 +907,8 @@ func runOpenDeferFrame(gp *g, d *_defer) bool {
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// This is marked as a wrapper by the compiler so it doesn't appear in
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// tracebacks.
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func reflectcallSave(p *_panic, fn, arg unsafe.Pointer, argsize uint32) {
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if experimentRegabiDefer {
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throw("not allowed with experimentRegabiDefer")
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if goexperiment.RegabiDefer {
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throw("not allowed with GOEXPERIMENT=regabidefer")
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}
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if p != nil {
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p.argp = unsafe.Pointer(getargp(0))
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@ -932,8 +933,8 @@ func reflectcallSave(p *_panic, fn, arg unsafe.Pointer, argsize uint32) {
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// This is marked as a wrapper by the compiler so it doesn't appear in
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// tracebacks.
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func deferCallSave(p *_panic, fn func()) {
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if !experimentRegabiDefer {
|
||||
throw("only allowed with experimentRegabiDefer")
|
||||
if !goexperiment.RegabiDefer {
|
||||
throw("only allowed with GOEXPERIMENT=regabidefer")
|
||||
}
|
||||
if p != nil {
|
||||
p.argp = unsafe.Pointer(getargp(0))
|
||||
@ -1035,7 +1036,7 @@ func gopanic(e interface{}) {
|
||||
} else {
|
||||
p.argp = unsafe.Pointer(getargp(0))
|
||||
|
||||
if experimentRegabiDefer {
|
||||
if goexperiment.RegabiDefer {
|
||||
fn := deferFunc(d)
|
||||
fn()
|
||||
} else {
|
||||
|
@ -6,6 +6,7 @@ package runtime
|
||||
|
||||
import (
|
||||
"internal/cpu"
|
||||
"internal/goexperiment"
|
||||
"runtime/internal/atomic"
|
||||
"runtime/internal/sys"
|
||||
"unsafe"
|
||||
@ -4021,8 +4022,8 @@ func malg(stacksize int32) *g {
|
||||
//
|
||||
//go:nosplit
|
||||
func newproc(siz int32, fn *funcval) {
|
||||
if experimentRegabiDefer && siz != 0 {
|
||||
// TODO: When we commit to experimentRegabiDefer,
|
||||
if goexperiment.RegabiDefer && siz != 0 {
|
||||
// TODO: When we commit to GOEXPERIMENT=regabidefer,
|
||||
// rewrite newproc's comment, since it will no longer
|
||||
// have a funny stack layout or need to be nosplit.
|
||||
throw("go with non-empty frame")
|
||||
|
@ -1,10 +0,0 @@
|
||||
// Copyright 2021 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.
|
||||
|
||||
//go:build !goexperiment.regabiargs
|
||||
// +build !goexperiment.regabiargs
|
||||
|
||||
package runtime
|
||||
|
||||
const experimentRegabiArgs = 0
|
@ -1,10 +0,0 @@
|
||||
// Copyright 2021 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.
|
||||
|
||||
//go:build goexperiment.regabiargs
|
||||
// +build goexperiment.regabiargs
|
||||
|
||||
package runtime
|
||||
|
||||
const experimentRegabiArgs = 1
|
@ -1,10 +0,0 @@
|
||||
// Copyright 2021 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.
|
||||
|
||||
//go:build !goexperiment.regabidefer
|
||||
// +build !goexperiment.regabidefer
|
||||
|
||||
package runtime
|
||||
|
||||
const experimentRegabiDefer = false
|
@ -1,10 +0,0 @@
|
||||
// Copyright 2021 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.
|
||||
|
||||
//go:build goexperiment.regabidefer
|
||||
// +build goexperiment.regabidefer
|
||||
|
||||
package runtime
|
||||
|
||||
const experimentRegabiDefer = true
|
@ -6,6 +6,7 @@ package runtime
|
||||
|
||||
import (
|
||||
"internal/abi"
|
||||
"internal/goexperiment"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
@ -423,4 +424,4 @@ func sigpanic0()
|
||||
// everywhere.
|
||||
//
|
||||
// Protected by finlock.
|
||||
var intArgRegs = abi.IntArgRegs * experimentRegabiArgs
|
||||
var intArgRegs = abi.IntArgRegs * goexperiment.RegabiArgsInt
|
||||
|
Loading…
Reference in New Issue
Block a user