diff options
Diffstat (limited to 'vendor/github.com/bytedance/sonic/loader/internal/rt/stackmap.go')
| -rw-r--r-- | vendor/github.com/bytedance/sonic/loader/internal/rt/stackmap.go | 228 |
1 files changed, 0 insertions, 228 deletions
diff --git a/vendor/github.com/bytedance/sonic/loader/internal/rt/stackmap.go b/vendor/github.com/bytedance/sonic/loader/internal/rt/stackmap.go deleted file mode 100644 index c4394742b..000000000 --- a/vendor/github.com/bytedance/sonic/loader/internal/rt/stackmap.go +++ /dev/null @@ -1,228 +0,0 @@ -/** - * Copyright 2023 ByteDance Inc. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package rt - -import ( - `fmt` - `strings` - `unsafe` - -) - -type Bitmap struct { - N int - B []byte -} - -func (self *Bitmap) grow() { - if self.N >= len(self.B) * 8 { - self.B = append(self.B, 0) - } -} - -func (self *Bitmap) mark(i int, bv int) { - if bv != 0 { - self.B[i / 8] |= 1 << (i % 8) - } else { - self.B[i / 8] &^= 1 << (i % 8) - } -} - -func (self *Bitmap) Set(i int, bv int) { - if i >= self.N { - panic("bitmap: invalid bit position") - } else { - self.mark(i, bv) - } -} - -func (self *Bitmap) Append(bv int) { - self.grow() - self.mark(self.N, bv) - self.N++ -} - -func (self *Bitmap) AppendMany(n int, bv int) { - for i := 0; i < n; i++ { - self.Append(bv) - } -} - -func (b *Bitmap) String() string { - var buf strings.Builder - for _, byteVal := range b.B { - fmt.Fprintf(&buf, "%08b ", byteVal) - } - return fmt.Sprintf("Bits: %s(total %d bits, %d bytes)", buf.String(), b.N, len(b.B)) -} - -type BitVec struct { - N uintptr - B unsafe.Pointer -} - -func (self BitVec) Bit(i uintptr) byte { - return (*(*byte)(unsafe.Pointer(uintptr(self.B) + i / 8)) >> (i % 8)) & 1 -} - -func (self BitVec) String() string { - var i uintptr - var v []string - - /* add each bit */ - for i = 0; i < self.N; i++ { - v = append(v, fmt.Sprintf("%d", self.Bit(i))) - } - - /* join them together */ - return fmt.Sprintf( - "BitVec { %s }", - strings.Join(v, ", "), - ) -} - -/* -reference Golang 1.22.0 code: - -``` -args := bitvec.New(int32(maxArgs / int64(types.PtrSize))) -aoff := objw.Uint32(&argsSymTmp, 0, uint32(len(lv.stackMaps))) // number of bitmaps -aoff = objw.Uint32(&argsSymTmp, aoff, uint32(args.N)) // number of bits in each bitmap - -locals := bitvec.New(int32(maxLocals / int64(types.PtrSize))) -loff := objw.Uint32(&liveSymTmp, 0, uint32(len(lv.stackMaps))) // number of bitmaps -loff = objw.Uint32(&liveSymTmp, loff, uint32(locals.N)) // number of bits in each bitmap - -for _, live := range lv.stackMaps { - args.Clear() - locals.Clear() - - lv.pointerMap(live, lv.vars, args, locals) - - aoff = objw.BitVec(&argsSymTmp, aoff, args) - loff = objw.BitVec(&liveSymTmp, loff, locals) -} -``` - -*/ - -type StackMap struct { - // number of bitmaps - N int32 - // number of bits of each bitmap - L int32 - // bitmap1, bitmap2, ... bitmapN - B [1]byte -} - -func (self *StackMap) Get(i int) BitVec { - return BitVec { - N: uintptr(self.L), - B: unsafe.Pointer(uintptr(unsafe.Pointer(&self.B)) + uintptr(i * self.BitmapBytes())), - } -} - -func (self *StackMap) String() string { - sb := strings.Builder{} - sb.WriteString("StackMap {") - - /* dump every stack map */ - for i := 0; i < int(self.N); i++ { - sb.WriteRune('\n') - sb.WriteString(" " + self.Get(i).String()) - } - - /* close the stackmap */ - sb.WriteString("\n}") - return sb.String() -} - -func (self *StackMap) BitmapLen() int { - return int(self.L) -} - -func (self *StackMap) BitmapBytes() int { - return int(self.L + 7) >> 3 -} - -func (self *StackMap) BitmapNums() int { - return int(self.N) -} - -func (self *StackMap) StackMapHeaderSize() int { - return int(unsafe.Sizeof(self.L)) + int(unsafe.Sizeof(self.N)) -} - -func (self *StackMap) MarshalBinary() ([]byte, error) { - size := self.BinaryLen() - return BytesFrom(unsafe.Pointer(self), size, size), nil -} - -func (self *StackMap) BinaryLen() int { - return self.StackMapHeaderSize() + self.BitmapBytes() * self.BitmapNums() -} - -var ( - byteType = UnpackEface(byte(0)).Type -) - -const ( - _StackMapSize = unsafe.Sizeof(StackMap{}) -) - -//go:linkname mallocgc runtime.mallocgc -//goland:noinspection GoUnusedParameter -func mallocgc(nb uintptr, vt *GoType, zero bool) unsafe.Pointer - -type StackMapBuilder struct { - b Bitmap -} - - -//go:nocheckptr -func (self *StackMapBuilder) Build() (p *StackMap) { - nb := len(self.b.B) - allocatedSize := _StackMapSize + uintptr(nb) - 1 - bm := mallocgc(allocatedSize, byteType, false) - - /* initialize as 1 bitmap of N bits */ - p = (*StackMap)(bm) - p.N, p.L = 1, int32(self.b.N) - copy(BytesFrom(unsafe.Pointer(&p.B), nb, nb), self.b.B) - - /* assert length */ - if allocatedSize < uintptr(p.BinaryLen()) { - panic(fmt.Sprintf("stackmap allocation too small: allocated %d, required %d", allocatedSize, p.BinaryLen())) - } - return -} - -func (self *StackMapBuilder) AddField(ptr bool) { - if ptr { - self.b.Append(1) - } else { - self.b.Append(0) - } -} - -func (self *StackMapBuilder) AddFields(n int, ptr bool) { - if ptr { - self.b.AppendMany(n, 1) - } else { - self.b.AppendMany(n, 0) - } -}
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