diff options
Diffstat (limited to 'vendor/github.com/bytedance/sonic/loader/funcdata.go')
| -rw-r--r-- | vendor/github.com/bytedance/sonic/loader/funcdata.go | 245 |
1 files changed, 0 insertions, 245 deletions
diff --git a/vendor/github.com/bytedance/sonic/loader/funcdata.go b/vendor/github.com/bytedance/sonic/loader/funcdata.go deleted file mode 100644 index 0e8594c2e..000000000 --- a/vendor/github.com/bytedance/sonic/loader/funcdata.go +++ /dev/null @@ -1,245 +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 loader - -import ( - `encoding` - `encoding/binary` - `fmt` - `reflect` - `strings` - `sync` - `unsafe` -) - -const ( - _MinLC uint8 = 1 - _PtrSize uint8 = 8 -) - -const ( - _N_FUNCDATA = 8 - _INVALID_FUNCDATA_OFFSET = ^uint32(0) - _FUNC_SIZE = unsafe.Sizeof(_func{}) - - _MINFUNC = 16 // minimum size for a function - _BUCKETSIZE = 256 * _MINFUNC - _SUBBUCKETS = 16 - _SUB_BUCKETSIZE = _BUCKETSIZE / _SUBBUCKETS -) - -// Note: This list must match the list in runtime/symtab.go. -const ( - FuncFlag_TOPFRAME = 1 << iota - FuncFlag_SPWRITE - FuncFlag_ASM -) - -// PCDATA and FUNCDATA table indexes. -// -// See funcdata.h and $GROOT/src/cmd/internal/objabi/funcdata.go. -const ( - _FUNCDATA_ArgsPointerMaps = 0 - _FUNCDATA_LocalsPointerMaps = 1 - _FUNCDATA_StackObjects = 2 - _FUNCDATA_InlTree = 3 - _FUNCDATA_OpenCodedDeferInfo = 4 - _FUNCDATA_ArgInfo = 5 - _FUNCDATA_ArgLiveInfo = 6 - _FUNCDATA_WrapInfo = 7 - - // ArgsSizeUnknown is set in Func.argsize to mark all functions - // whose argument size is unknown (C vararg functions, and - // assembly code without an explicit specification). - // This value is generated by the compiler, assembler, or linker. - ArgsSizeUnknown = -0x80000000 -) - -// moduledata used to cache the funcdata and findfuncbucket of one module -var moduleCache = struct { - m map[*moduledata][]byte - sync.Mutex -}{ - m: make(map[*moduledata][]byte), -} - -// Func contains information about a function. -type Func struct { - ID uint8 // see runtime/symtab.go - Flag uint8 // see runtime/symtab.go - ArgsSize int32 // args byte size - EntryOff uint32 // start pc, offset to moduledata.text - TextSize uint32 // size of func text - DeferReturn uint32 // offset of start of a deferreturn call instruction from entry, if any. - FileIndex uint32 // index into filetab - Name string // name of function - - // PC data - Pcsp *Pcdata // PC -> SP delta - Pcfile *Pcdata // PC -> file index - Pcline *Pcdata // PC -> line number - PcUnsafePoint *Pcdata // PC -> unsafe point, must be PCDATA_UnsafePointSafe or PCDATA_UnsafePointUnsafe - PcStackMapIndex *Pcdata // PC -> stack map index, relative to ArgsPointerMaps and LocalsPointerMaps - PcInlTreeIndex *Pcdata // PC -> inlining tree index, relative to InlTree - PcArgLiveIndex *Pcdata // PC -> arg live index, relative to ArgLiveInfo - - // Func data, must implement encoding.BinaryMarshaler - ArgsPointerMaps encoding.BinaryMarshaler // concrete type: *StackMap - LocalsPointerMaps encoding.BinaryMarshaler // concrete type: *StackMap - StackObjects encoding.BinaryMarshaler - InlTree encoding.BinaryMarshaler - OpenCodedDeferInfo encoding.BinaryMarshaler - ArgInfo encoding.BinaryMarshaler - ArgLiveInfo encoding.BinaryMarshaler - WrapInfo encoding.BinaryMarshaler -} - -func getOffsetOf(data interface{}, field string) uintptr { - t := reflect.TypeOf(data) - fv, ok := t.FieldByName(field) - if !ok { - panic(fmt.Sprintf("field %s not found in struct %s", field, t.Name())) - } - return fv.Offset -} - -func rnd(v int64, r int64) int64 { - if r <= 0 { - return v - } - v += r - 1 - c := v % r - if c < 0 { - c += r - } - v -= c - return v -} - -var ( - byteOrder binary.ByteOrder = binary.LittleEndian -) - -func funcNameParts(name string) (string, string, string) { - i := strings.IndexByte(name, '[') - if i < 0 { - return name, "", "" - } - // TODO: use LastIndexByte once the bootstrap compiler is >= Go 1.5. - j := len(name) - 1 - for j > i && name[j] != ']' { - j-- - } - if j <= i { - return name, "", "" - } - return name[:i], "[...]", name[j+1:] -} - - -// func name table format: -// nameOff[0] -> namePartA namePartB namePartC \x00 -// nameOff[1] -> namePartA namePartB namePartC \x00 -// ... -func makeFuncnameTab(funcs []Func) (tab []byte, offs []int32) { - offs = make([]int32, len(funcs)) - offset := 1 - tab = []byte{0} - - for i, f := range funcs { - offs[i] = int32(offset) - - a, b, c := funcNameParts(f.Name) - tab = append(tab, a...) - tab = append(tab, b...) - tab = append(tab, c...) - tab = append(tab, 0) - offset += len(a) + len(b) + len(c) + 1 - } - - return -} - -// CU table format: -// cuOffsets[0] -> filetabOffset[0] filetabOffset[1] ... filetabOffset[len(CUs[0].fileNames)-1] -// cuOffsets[1] -> filetabOffset[len(CUs[0].fileNames)] ... filetabOffset[len(CUs[0].fileNames) + len(CUs[1].fileNames)-1] -// ... -// -// file name table format: -// filetabOffset[0] -> CUs[0].fileNames[0] \x00 -// ... -// filetabOffset[len(CUs[0]-1)] -> CUs[0].fileNames[len(CUs[0].fileNames)-1] \x00 -// ... -// filetabOffset[SUM(CUs,fileNames)-1] -> CUs[len(CU)-1].fileNames[len(CUs[len(CU)-1].fileNames)-1] \x00 -func makeFilenametab(cus []compilationUnit) (cutab []uint32, filetab []byte, cuOffsets []uint32) { - cuOffsets = make([]uint32, len(cus)) - cuOffset := 0 - fileOffset := 0 - - for i, cu := range cus { - cuOffsets[i] = uint32(cuOffset) - - for _, name := range cu.fileNames { - cutab = append(cutab, uint32(fileOffset)) - - fileOffset += len(name) + 1 - filetab = append(filetab, name...) - filetab = append(filetab, 0) - } - - cuOffset += len(cu.fileNames) - } - - return -} - -func writeFuncdata(out *[]byte, funcs []Func) (fstart int, funcdataOffs [][]uint32) { - fstart = len(*out) - *out = append(*out, byte(0)) - offs := uint32(1) - - funcdataOffs = make([][]uint32, len(funcs)) - for i, f := range funcs { - - var writer = func(fd encoding.BinaryMarshaler) { - var ab []byte - var err error - if fd != nil { - ab, err = fd.MarshalBinary() - if err != nil { - panic(err) - } - funcdataOffs[i] = append(funcdataOffs[i], offs) - } else { - ab = []byte{0} - funcdataOffs[i] = append(funcdataOffs[i], _INVALID_FUNCDATA_OFFSET) - } - *out = append(*out, ab...) - offs += uint32(len(ab)) - } - - writer(f.ArgsPointerMaps) - writer(f.LocalsPointerMaps) - writer(f.StackObjects) - writer(f.InlTree) - writer(f.OpenCodedDeferInfo) - writer(f.ArgInfo) - writer(f.ArgLiveInfo) - writer(f.WrapInfo) - } - return -} |