mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2025-01-23 06:40:21 +00:00
4d423102c1
Bumps [github.com/gin-contrib/gzip](https://github.com/gin-contrib/gzip) from 1.0.1 to 1.1.0. - [Release notes](https://github.com/gin-contrib/gzip/releases) - [Changelog](https://github.com/gin-contrib/gzip/blob/master/.goreleaser.yaml) - [Commits](https://github.com/gin-contrib/gzip/compare/v1.0.1...v1.1.0) --- updated-dependencies: - dependency-name: github.com/gin-contrib/gzip dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
86 lines
2.1 KiB
Go
86 lines
2.1 KiB
Go
// +build go1.21
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/*
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* Copyright 2021 ByteDance Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package rt
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import (
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`sync/atomic`
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`unsafe`
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`golang.org/x/arch/x86/x86asm`
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)
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//go:linkname GcWriteBarrier2 runtime.gcWriteBarrier2
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func GcWriteBarrier2()
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//go:linkname RuntimeWriteBarrier runtime.writeBarrier
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var RuntimeWriteBarrier uintptr
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const (
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_MaxInstr = 15
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)
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func isvar(arg x86asm.Arg) bool {
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v, ok := arg.(x86asm.Mem)
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return ok && v.Base == x86asm.RIP
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}
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func iszero(arg x86asm.Arg) bool {
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v, ok := arg.(x86asm.Imm)
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return ok && v == 0
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}
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func GcwbAddr() uintptr {
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var err error
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var off uintptr
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var ins x86asm.Inst
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/* get the function address */
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pc := uintptr(0)
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fp := FuncAddr(atomic.StorePointer)
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/* search within the first 16 instructions */
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for i := 0; i < 16; i++ {
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mem := unsafe.Pointer(uintptr(fp) + pc)
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buf := BytesFrom(mem, _MaxInstr, _MaxInstr)
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/* disassemble the instruction */
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if ins, err = x86asm.Decode(buf, 64); err != nil {
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panic("gcwbaddr: " + err.Error())
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}
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/* check for a byte comparison with zero */
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if ins.Op == x86asm.CMP && ins.MemBytes == 1 && isvar(ins.Args[0]) && iszero(ins.Args[1]) {
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off = pc + uintptr(ins.Len) + uintptr(ins.Args[0].(x86asm.Mem).Disp)
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break
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}
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/* move to next instruction */
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nb := ins.Len
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pc += uintptr(nb)
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}
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/* check for address */
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if off == 0 {
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panic("gcwbaddr: could not locate the variable `writeBarrier`")
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} else {
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return uintptr(fp) + off
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}
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}
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