global: update to go 1.18 beta1

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

4 files changed, 0 insertions, 508 deletions

diff --git a/go-patches/0001-runtime-allow-builtin-write-function-to-be-redirecte.patch b/go-patches/0001-runtime-allow-builtin-write-function-to-be-redirecte.patch
deleted file mode 100644
index 3b44b363..00000000
--- a/go-patches/0001-runtime-allow-builtin-write-function-to-be-redirecte.patch
+++ /dev/null
@@ -1,56 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: "Jason A. Donenfeld" <Jason@zx2c4.com>
-Date: Thu, 3 Dec 2020 13:29:58 +0100
-Subject: [PATCH] runtime: allow builtin write function to be redirected with
- function pointer
-
-The x/sys/windows package currently uses go:linkname for other facilities
-inside of runtime that are not suitable to be exposed as a public API
-due to their dangers but are still necessary for manipulating any
-low-level plumbing that the runtime controls.
-
-Logging, via the built-in println and panic handler, is one such
-low-level plumbing feature. In this case, x/sys/windows/svc needs to be
-able to redirect panics to the Windows event log. Because the event log
-is a complicated interface, this requires a bit more fiddling than the
-simple solution used on Android (baking it into runtime itself), and
-because Windows services are very diverse, the event log might not even
-always be a desirable destination.
-
-This commit accomplishes this by exposing a function pointer called
-"overrideWrite" that low-level runtime packages like x/sys/windows/svc
-can use to redirect output logs toward the event log or otherwise.
-
-It is not safe or acceptable to use as a generic mechanism, and for that
-reason, we wouldn't want to expose this as a real stable API, similar to
-the other instances of go:linkname in x/sys/windows. But for packages
-that must interoperate with low-level Go runtime fundamentals, this is a
-safety hatch for packages that are developed in tandem with the runtime.
-x/sys/windows is one such package.
-
-Updates #42888.
-
-Change-Id: I77a32ff7e1494324e8cc38e792e007f86d32672d
----
- src/runtime/time_nofake.go | 5 +++++
- 1 file changed, 5 insertions(+)
-
-diff --git a/src/runtime/time_nofake.go b/src/runtime/time_nofake.go
-index 5a4ceaf43d..68c01805a5 100644
---- a/src/runtime/time_nofake.go
-+++ b/src/runtime/time_nofake.go
-@@ -20,9 +20,14 @@ func nanotime() int64 {
- 	return nanotime1()
- }
- 
-+var overrideWrite func(fd uintptr, p unsafe.Pointer, n int32) int32
-+
- // write must be nosplit on Windows (see write1)
- //
- //go:nosplit
- func write(fd uintptr, p unsafe.Pointer, n int32) int32 {
-+	if overrideWrite != nil {
-+		return overrideWrite(fd, noescape(p), n)
-+	}
- 	return write1(fd, p, n)
- }
diff --git a/go-patches/0002-release-branch.go1.17-cmd-compile-speed-up-unsafe.Sl.patch b/go-patches/0002-release-branch.go1.17-cmd-compile-speed-up-unsafe.Sl.patch
deleted file mode 100644
index 0dac195a..00000000
--- a/go-patches/0002-release-branch.go1.17-cmd-compile-speed-up-unsafe.Sl.patch
+++ /dev/null
@@ -1,328 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: "Jason A. Donenfeld" <Jason@zx2c4.com>
-Date: Mon, 11 Oct 2021 21:31:47 -0600
-Subject: [PATCH] [release-branch.go1.17] cmd/compile: speed up unsafe.Slice by
- omitting checks
-
-unsafe.Slice is already an unsafe operation, like unsafe.Pointer casts.
-So, assume the user knows what they're doing, unless checkptr is used,
-in which case, we can then emit the checker code, just like
-unsafe.Pointer casts do.
-
-Fixes #48798.
-
-Change-Id: Ice1f615b49fe13556f71495f303d4ff0eb794bd9
----
- src/cmd/compile/internal/typecheck/builtin.go | 179 +++++++++---------
- .../internal/typecheck/builtin/runtime.go     |   2 -
- src/cmd/compile/internal/walk/builtin.go      |  19 +-
- test/unsafebuiltins.go                        |  30 +--
- 4 files changed, 92 insertions(+), 138 deletions(-)
-
-diff --git a/src/cmd/compile/internal/typecheck/builtin.go b/src/cmd/compile/internal/typecheck/builtin.go
-index 833b17b414..add59020a7 100644
---- a/src/cmd/compile/internal/typecheck/builtin.go
-+++ b/src/cmd/compile/internal/typecheck/builtin.go
-@@ -136,72 +136,70 @@ var runtimeDecls = [...]struct {
- 	{"makeslice64", funcTag, 113},
- 	{"makeslicecopy", funcTag, 114},
- 	{"growslice", funcTag, 116},
--	{"unsafeslice", funcTag, 117},
--	{"unsafeslice64", funcTag, 118},
--	{"unsafeslicecheckptr", funcTag, 118},
--	{"memmove", funcTag, 119},
--	{"memclrNoHeapPointers", funcTag, 120},
--	{"memclrHasPointers", funcTag, 120},
--	{"memequal", funcTag, 121},
--	{"memequal0", funcTag, 122},
--	{"memequal8", funcTag, 122},
--	{"memequal16", funcTag, 122},
--	{"memequal32", funcTag, 122},
--	{"memequal64", funcTag, 122},
--	{"memequal128", funcTag, 122},
--	{"f32equal", funcTag, 123},
--	{"f64equal", funcTag, 123},
--	{"c64equal", funcTag, 123},
--	{"c128equal", funcTag, 123},
--	{"strequal", funcTag, 123},
--	{"interequal", funcTag, 123},
--	{"nilinterequal", funcTag, 123},
--	{"memhash", funcTag, 124},
--	{"memhash0", funcTag, 125},
--	{"memhash8", funcTag, 125},
--	{"memhash16", funcTag, 125},
--	{"memhash32", funcTag, 125},
--	{"memhash64", funcTag, 125},
--	{"memhash128", funcTag, 125},
--	{"f32hash", funcTag, 125},
--	{"f64hash", funcTag, 125},
--	{"c64hash", funcTag, 125},
--	{"c128hash", funcTag, 125},
--	{"strhash", funcTag, 125},
--	{"interhash", funcTag, 125},
--	{"nilinterhash", funcTag, 125},
--	{"int64div", funcTag, 126},
--	{"uint64div", funcTag, 127},
--	{"int64mod", funcTag, 126},
--	{"uint64mod", funcTag, 127},
--	{"float64toint64", funcTag, 128},
--	{"float64touint64", funcTag, 129},
--	{"float64touint32", funcTag, 130},
--	{"int64tofloat64", funcTag, 131},
--	{"uint64tofloat64", funcTag, 132},
--	{"uint32tofloat64", funcTag, 133},
--	{"complex128div", funcTag, 134},
--	{"getcallerpc", funcTag, 135},
--	{"getcallersp", funcTag, 135},
-+	{"unsafeslicecheckptr", funcTag, 117},
-+	{"memmove", funcTag, 118},
-+	{"memclrNoHeapPointers", funcTag, 119},
-+	{"memclrHasPointers", funcTag, 119},
-+	{"memequal", funcTag, 120},
-+	{"memequal0", funcTag, 121},
-+	{"memequal8", funcTag, 121},
-+	{"memequal16", funcTag, 121},
-+	{"memequal32", funcTag, 121},
-+	{"memequal64", funcTag, 121},
-+	{"memequal128", funcTag, 121},
-+	{"f32equal", funcTag, 122},
-+	{"f64equal", funcTag, 122},
-+	{"c64equal", funcTag, 122},
-+	{"c128equal", funcTag, 122},
-+	{"strequal", funcTag, 122},
-+	{"interequal", funcTag, 122},
-+	{"nilinterequal", funcTag, 122},
-+	{"memhash", funcTag, 123},
-+	{"memhash0", funcTag, 124},
-+	{"memhash8", funcTag, 124},
-+	{"memhash16", funcTag, 124},
-+	{"memhash32", funcTag, 124},
-+	{"memhash64", funcTag, 124},
-+	{"memhash128", funcTag, 124},
-+	{"f32hash", funcTag, 124},
-+	{"f64hash", funcTag, 124},
-+	{"c64hash", funcTag, 124},
-+	{"c128hash", funcTag, 124},
-+	{"strhash", funcTag, 124},
-+	{"interhash", funcTag, 124},
-+	{"nilinterhash", funcTag, 124},
-+	{"int64div", funcTag, 125},
-+	{"uint64div", funcTag, 126},
-+	{"int64mod", funcTag, 125},
-+	{"uint64mod", funcTag, 126},
-+	{"float64toint64", funcTag, 127},
-+	{"float64touint64", funcTag, 128},
-+	{"float64touint32", funcTag, 129},
-+	{"int64tofloat64", funcTag, 130},
-+	{"uint64tofloat64", funcTag, 131},
-+	{"uint32tofloat64", funcTag, 132},
-+	{"complex128div", funcTag, 133},
-+	{"getcallerpc", funcTag, 134},
-+	{"getcallersp", funcTag, 134},
- 	{"racefuncenter", funcTag, 31},
- 	{"racefuncexit", funcTag, 9},
- 	{"raceread", funcTag, 31},
- 	{"racewrite", funcTag, 31},
--	{"racereadrange", funcTag, 136},
--	{"racewriterange", funcTag, 136},
--	{"msanread", funcTag, 136},
--	{"msanwrite", funcTag, 136},
--	{"msanmove", funcTag, 137},
--	{"checkptrAlignment", funcTag, 138},
--	{"checkptrArithmetic", funcTag, 140},
--	{"libfuzzerTraceCmp1", funcTag, 141},
--	{"libfuzzerTraceCmp2", funcTag, 142},
--	{"libfuzzerTraceCmp4", funcTag, 143},
--	{"libfuzzerTraceCmp8", funcTag, 144},
--	{"libfuzzerTraceConstCmp1", funcTag, 141},
--	{"libfuzzerTraceConstCmp2", funcTag, 142},
--	{"libfuzzerTraceConstCmp4", funcTag, 143},
--	{"libfuzzerTraceConstCmp8", funcTag, 144},
-+	{"racereadrange", funcTag, 135},
-+	{"racewriterange", funcTag, 135},
-+	{"msanread", funcTag, 135},
-+	{"msanwrite", funcTag, 135},
-+	{"msanmove", funcTag, 136},
-+	{"checkptrAlignment", funcTag, 137},
-+	{"checkptrArithmetic", funcTag, 139},
-+	{"libfuzzerTraceCmp1", funcTag, 140},
-+	{"libfuzzerTraceCmp2", funcTag, 141},
-+	{"libfuzzerTraceCmp4", funcTag, 142},
-+	{"libfuzzerTraceCmp8", funcTag, 143},
-+	{"libfuzzerTraceConstCmp1", funcTag, 140},
-+	{"libfuzzerTraceConstCmp2", funcTag, 141},
-+	{"libfuzzerTraceConstCmp4", funcTag, 142},
-+	{"libfuzzerTraceConstCmp8", funcTag, 143},
- 	{"x86HasPOPCNT", varTag, 6},
- 	{"x86HasSSE41", varTag, 6},
- 	{"x86HasFMA", varTag, 6},
-@@ -224,7 +222,7 @@ func params(tlist ...*types.Type) []*types.Field {
- }
- 
- func runtimeTypes() []*types.Type {
--	var typs [145]*types.Type
-+	var typs [144]*types.Type
- 	typs[0] = types.ByteType
- 	typs[1] = types.NewPtr(typs[0])
- 	typs[2] = types.Types[types.TANY]
-@@ -342,33 +340,32 @@ func runtimeTypes() []*types.Type {
- 	typs[114] = newSig(params(typs[1], typs[15], typs[15], typs[7]), params(typs[7]))
- 	typs[115] = types.NewSlice(typs[2])
- 	typs[116] = newSig(params(typs[1], typs[115], typs[15]), params(typs[115]))
--	typs[117] = newSig(params(typs[1], typs[7], typs[15]), nil)
--	typs[118] = newSig(params(typs[1], typs[7], typs[22]), nil)
--	typs[119] = newSig(params(typs[3], typs[3], typs[5]), nil)
--	typs[120] = newSig(params(typs[7], typs[5]), nil)
--	typs[121] = newSig(params(typs[3], typs[3], typs[5]), params(typs[6]))
--	typs[122] = newSig(params(typs[3], typs[3]), params(typs[6]))
--	typs[123] = newSig(params(typs[7], typs[7]), params(typs[6]))
--	typs[124] = newSig(params(typs[7], typs[5], typs[5]), params(typs[5]))
--	typs[125] = newSig(params(typs[7], typs[5]), params(typs[5]))
--	typs[126] = newSig(params(typs[22], typs[22]), params(typs[22]))
--	typs[127] = newSig(params(typs[24], typs[24]), params(typs[24]))
--	typs[128] = newSig(params(typs[20]), params(typs[22]))
--	typs[129] = newSig(params(typs[20]), params(typs[24]))
--	typs[130] = newSig(params(typs[20]), params(typs[60]))
--	typs[131] = newSig(params(typs[22]), params(typs[20]))
--	typs[132] = newSig(params(typs[24]), params(typs[20]))
--	typs[133] = newSig(params(typs[60]), params(typs[20]))
--	typs[134] = newSig(params(typs[26], typs[26]), params(typs[26]))
--	typs[135] = newSig(nil, params(typs[5]))
--	typs[136] = newSig(params(typs[5], typs[5]), nil)
--	typs[137] = newSig(params(typs[5], typs[5], typs[5]), nil)
--	typs[138] = newSig(params(typs[7], typs[1], typs[5]), nil)
--	typs[139] = types.NewSlice(typs[7])
--	typs[140] = newSig(params(typs[7], typs[139]), nil)
--	typs[141] = newSig(params(typs[64], typs[64]), nil)
--	typs[142] = newSig(params(typs[58], typs[58]), nil)
--	typs[143] = newSig(params(typs[60], typs[60]), nil)
--	typs[144] = newSig(params(typs[24], typs[24]), nil)
-+	typs[117] = newSig(params(typs[1], typs[7], typs[22]), nil)
-+	typs[118] = newSig(params(typs[3], typs[3], typs[5]), nil)
-+	typs[119] = newSig(params(typs[7], typs[5]), nil)
-+	typs[120] = newSig(params(typs[3], typs[3], typs[5]), params(typs[6]))
-+	typs[121] = newSig(params(typs[3], typs[3]), params(typs[6]))
-+	typs[122] = newSig(params(typs[7], typs[7]), params(typs[6]))
-+	typs[123] = newSig(params(typs[7], typs[5], typs[5]), params(typs[5]))
-+	typs[124] = newSig(params(typs[7], typs[5]), params(typs[5]))
-+	typs[125] = newSig(params(typs[22], typs[22]), params(typs[22]))
-+	typs[126] = newSig(params(typs[24], typs[24]), params(typs[24]))
-+	typs[127] = newSig(params(typs[20]), params(typs[22]))
-+	typs[128] = newSig(params(typs[20]), params(typs[24]))
-+	typs[129] = newSig(params(typs[20]), params(typs[60]))
-+	typs[130] = newSig(params(typs[22]), params(typs[20]))
-+	typs[131] = newSig(params(typs[24]), params(typs[20]))
-+	typs[132] = newSig(params(typs[60]), params(typs[20]))
-+	typs[133] = newSig(params(typs[26], typs[26]), params(typs[26]))
-+	typs[134] = newSig(nil, params(typs[5]))
-+	typs[135] = newSig(params(typs[5], typs[5]), nil)
-+	typs[136] = newSig(params(typs[5], typs[5], typs[5]), nil)
-+	typs[137] = newSig(params(typs[7], typs[1], typs[5]), nil)
-+	typs[138] = types.NewSlice(typs[7])
-+	typs[139] = newSig(params(typs[7], typs[138]), nil)
-+	typs[140] = newSig(params(typs[64], typs[64]), nil)
-+	typs[141] = newSig(params(typs[58], typs[58]), nil)
-+	typs[142] = newSig(params(typs[60], typs[60]), nil)
-+	typs[143] = newSig(params(typs[24], typs[24]), nil)
- 	return typs[:]
- }
-diff --git a/src/cmd/compile/internal/typecheck/builtin/runtime.go b/src/cmd/compile/internal/typecheck/builtin/runtime.go
-index 2b29ea3c08..bd45258058 100644
---- a/src/cmd/compile/internal/typecheck/builtin/runtime.go
-+++ b/src/cmd/compile/internal/typecheck/builtin/runtime.go
-@@ -183,8 +183,6 @@ func makeslice(typ *byte, len int, cap int) unsafe.Pointer
- func makeslice64(typ *byte, len int64, cap int64) unsafe.Pointer
- func makeslicecopy(typ *byte, tolen int, fromlen int, from unsafe.Pointer) unsafe.Pointer
- func growslice(typ *byte, old []any, cap int) (ary []any)
--func unsafeslice(typ *byte, ptr unsafe.Pointer, len int)
--func unsafeslice64(typ *byte, ptr unsafe.Pointer, len int64)
- func unsafeslicecheckptr(typ *byte, ptr unsafe.Pointer, len int64)
- 
- func memmove(to *any, frm *any, length uintptr)
-diff --git a/src/cmd/compile/internal/walk/builtin.go b/src/cmd/compile/internal/walk/builtin.go
-index 14efc05e32..2843d468e5 100644
---- a/src/cmd/compile/internal/walk/builtin.go
-+++ b/src/cmd/compile/internal/walk/builtin.go
-@@ -656,27 +656,14 @@ func walkRecover(nn *ir.CallExpr, init *ir.Nodes) ir.Node {
- func walkUnsafeSlice(n *ir.BinaryExpr, init *ir.Nodes) ir.Node {
- 	ptr := safeExpr(n.X, init)
- 	len := safeExpr(n.Y, init)
--
--	fnname := "unsafeslice64"
- 	lenType := types.Types[types.TINT64]
--
--	// Type checking guarantees that TIDEAL len/cap are positive and fit in an int.
--	// The case of len or cap overflow when converting TUINT or TUINTPTR to TINT
--	// will be handled by the negative range checks in unsafeslice during runtime.
-+	t := n.Type()
- 	if ir.ShouldCheckPtr(ir.CurFunc, 1) {
--		fnname = "unsafeslicecheckptr"
--		// for simplicity, unsafeslicecheckptr always uses int64
-+		fn := typecheck.LookupRuntime("unsafeslicecheckptr")
-+		init.Append(mkcall1(fn, nil, init, reflectdata.TypePtr(t.Elem()), typecheck.Conv(ptr, types.Types[types.TUNSAFEPTR]), typecheck.Conv(len, lenType)))
- 	} else if len.Type().IsKind(types.TIDEAL) || len.Type().Size() <= types.Types[types.TUINT].Size() {
--		fnname = "unsafeslice"
- 		lenType = types.Types[types.TINT]
- 	}
--
--	t := n.Type()
--
--	// Call runtime.unsafeslice{,64,checkptr} to check ptr and len.
--	fn := typecheck.LookupRuntime(fnname)
--	init.Append(mkcall1(fn, nil, init, reflectdata.TypePtr(t.Elem()), typecheck.Conv(ptr, types.Types[types.TUNSAFEPTR]), typecheck.Conv(len, lenType)))
--
- 	h := ir.NewSliceHeaderExpr(n.Pos(), t,
- 		typecheck.Conv(ptr, types.Types[types.TUNSAFEPTR]),
- 		typecheck.Conv(len, types.Types[types.TINT]),
-diff --git a/test/unsafebuiltins.go b/test/unsafebuiltins.go
-index 4c940aa855..d613088827 100644
---- a/test/unsafebuiltins.go
-+++ b/test/unsafebuiltins.go
-@@ -6,10 +6,7 @@
- 
- package main
- 
--import (
--	"math"
--	"unsafe"
--)
-+import "unsafe"
- 
- const maxUintptr = 1 << (8 * unsafe.Sizeof(uintptr(0)))
- 
-@@ -29,24 +26,6 @@ func main() {
- 		assert(&s[0] == &p[0])
- 		assert(len(s) == len(p))
- 		assert(cap(s) == len(p))
--
--		// nil pointer with zero length returns nil
--		assert(unsafe.Slice((*int)(nil), 0) == nil)
--
--		// nil pointer with positive length panics
--		mustPanic(func() { _ = unsafe.Slice((*int)(nil), 1) })
--
--		// negative length
--		var neg int = -1
--		mustPanic(func() { _ = unsafe.Slice(new(byte), neg) })
--
--		// length too large
--		var tooBig uint64 = math.MaxUint64
--		mustPanic(func() { _ = unsafe.Slice(new(byte), tooBig) })
--
--		// size overflows address space
--		mustPanic(func() { _ = unsafe.Slice(new(uint64), maxUintptr/8) })
--		mustPanic(func() { _ = unsafe.Slice(new(uint64), maxUintptr/8+1) })
- 	}
- }
- 
-@@ -55,10 +34,3 @@ func assert(ok bool) {
- 		panic("FAIL")
- 	}
- }
--
--func mustPanic(f func()) {
--	defer func() {
--		assert(recover() != nil)
--	}()
--	f()
--}
diff --git a/go-patches/0003-release-branch.go1.17-runtime-support-non-cooperativ.patch b/go-patches/0003-release-branch.go1.17-runtime-support-non-cooperativ.patch
deleted file mode 100644
index dbab4ba0..00000000
--- a/go-patches/0003-release-branch.go1.17-runtime-support-non-cooperativ.patch
+++ /dev/null
@@ -1,59 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: "Jason A. Donenfeld" <Jason@zx2c4.com>
-Date: Tue, 23 Nov 2021 20:04:24 +0100
-Subject: [PATCH] [release-branch.go1.17] runtime: support non-cooperative
- preemption on windows/arm
-
-This adds support for injecting asynchronous preemption calls on
-windows/arm. This code follows sigctxt.pushCall for POSIX OSes
-on arm, except we subtract 1 from IP, just as in CL 273727.
-
-Updates #10958.
-Updates #24543.
-Updates #49759.
-
-Change-Id: Id0c2aed28662f50631b8c8cede3b4e6f088dafea
-Reviewed-on: https://go-review.googlesource.com/c/go/+/366734
-Trust: Jason A. Donenfeld <Jason@zx2c4.com>
-Reviewed-by: Austin Clements <austin@google.com>
-Reviewed-by: Patrik Nyblom <pnyb@google.com>
-Reviewed-by: Cherry Mui <cherryyz@google.com>
----
- src/runtime/os_windows.go | 16 ++++++++++++++--
- 1 file changed, 14 insertions(+), 2 deletions(-)
-
-diff --git a/src/runtime/os_windows.go b/src/runtime/os_windows.go
-index f0935264ac..faeb6ce552 100644
---- a/src/runtime/os_windows.go
-+++ b/src/runtime/os_windows.go
-@@ -1303,7 +1303,7 @@ func setThreadCPUProfiler(hz int32) {
- 	atomic.Store((*uint32)(unsafe.Pointer(&getg().m.profilehz)), uint32(hz))
- }
- 
--const preemptMSupported = GOARCH == "386" || GOARCH == "amd64"
-+const preemptMSupported = GOARCH != "arm64"
- 
- // suspendLock protects simultaneous SuspendThread operations from
- // suspending each other.
-@@ -1396,8 +1396,20 @@ func preemptM(mp *m) {
- 				*(*uintptr)(unsafe.Pointer(sp)) = newpc
- 				c.set_sp(sp)
- 				c.set_ip(targetPC)
--			}
- 
-+			case "arm":
-+				// Push LR. The injected call is responsible
-+				// for restoring LR. gentraceback is aware of
-+				// this extra slot. See sigctxt.pushCall in
-+				// signal_arm.go, which is similar except we
-+				// subtract 1 from IP here.
-+				sp := c.sp()
-+				sp -= sys.PtrSize
-+				c.set_sp(sp)
-+				*(*uint32)(unsafe.Pointer(sp)) = uint32(c.lr())
-+				c.set_lr(newpc - 1)
-+				c.set_ip(targetPC)
-+			}
- 			stdcall2(_SetThreadContext, thread, uintptr(unsafe.Pointer(c)))
- 		}
- 	}
diff --git a/go-patches/0004-runtime-support-non-cooperative-preemption-on-window.patch b/go-patches/0004-runtime-support-non-cooperative-preemption-on-window.patch
deleted file mode 100644
index c99ea390..00000000
--- a/go-patches/0004-runtime-support-non-cooperative-preemption-on-window.patch
+++ /dev/null
@@ -1,65 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: "Jason A. Donenfeld" <Jason@zx2c4.com>
-Date: Tue, 23 Nov 2021 20:57:24 +0100
-Subject: [PATCH] runtime: support non-cooperative preemption on windows/arm64
-
-This adds support for injecting asynchronous preemption calls on
-windows/arm64. This code exactly follows sigctxt.pushCall for POSIX OSes
-on arm64.
-
-Fixes #49759.
-
-Change-Id: Id35ff6bc105c1db9d7ed2918d3ecab0e4e9a9431
-Reviewed-on: https://go-review.googlesource.com/c/go/+/366735
-Trust: Jason A. Donenfeld <Jason@zx2c4.com>
-Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
-TryBot-Result: Go Bot <gobot@golang.org>
-Reviewed-by: Cherry Mui <cherryyz@google.com>
-Reviewed-by: Austin Clements <austin@google.com>
-Reviewed-by: Patrik Nyblom <pnyb@google.com>
----
- src/runtime/os_windows.go | 18 ++++++++++++------
- 1 file changed, 12 insertions(+), 6 deletions(-)
-
-diff --git a/src/runtime/os_windows.go b/src/runtime/os_windows.go
-index faeb6ce552..7bf9a426d1 100644
---- a/src/runtime/os_windows.go
-+++ b/src/runtime/os_windows.go
-@@ -1303,18 +1303,13 @@ func setThreadCPUProfiler(hz int32) {
- 	atomic.Store((*uint32)(unsafe.Pointer(&getg().m.profilehz)), uint32(hz))
- }
- 
--const preemptMSupported = GOARCH != "arm64"
-+const preemptMSupported = true
- 
- // suspendLock protects simultaneous SuspendThread operations from
- // suspending each other.
- var suspendLock mutex
- 
- func preemptM(mp *m) {
--	if !preemptMSupported {
--		// TODO: Implement call injection
--		return
--	}
--
- 	if mp == getg().m {
- 		throw("self-preempt")
- 	}
-@@ -1409,6 +1404,17 @@ func preemptM(mp *m) {
- 				*(*uint32)(unsafe.Pointer(sp)) = uint32(c.lr())
- 				c.set_lr(newpc - 1)
- 				c.set_ip(targetPC)
-+
-+			case "arm64":
-+				// Push LR. The injected call is responsible
-+				// for restoring LR. gentraceback is aware of
-+				// this extra slot. See sigctxt.pushCall in
-+				// signal_arm64.go.
-+				sp := c.sp() - 16 // SP needs 16-byte alignment
-+				c.set_sp(sp)
-+				*(*uint64)(unsafe.Pointer(sp)) = uint64(c.lr())
-+				c.set_lr(newpc)
-+				c.set_ip(targetPC)
- 			}
- 			stdcall2(_SetThreadContext, thread, uintptr(unsafe.Pointer(c)))
- 		}