124 lines
3.0 KiB
Go
124 lines
3.0 KiB
Go
/*
|
|
* Copyright 2021 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 (
|
|
`reflect`
|
|
`sync`
|
|
`unsafe`
|
|
|
|
`github.com/bytedance/sonic/internal/rt`
|
|
)
|
|
|
|
//go:linkname lastmoduledatap runtime.lastmoduledatap
|
|
//goland:noinspection GoUnusedGlobalVariable
|
|
var lastmoduledatap *_ModuleData
|
|
|
|
//go:linkname moduledataverify1 runtime.moduledataverify1
|
|
func moduledataverify1(_ *_ModuleData)
|
|
|
|
// PCDATA and FUNCDATA table indexes.
|
|
//
|
|
// See funcdata.h and $GROOT/src/cmd/internal/objabi/funcdata.go.
|
|
const (
|
|
_FUNCDATA_ArgsPointerMaps = 0
|
|
_FUNCDATA_LocalsPointerMaps = 1
|
|
)
|
|
|
|
type funcInfo struct {
|
|
*_Func
|
|
datap *_ModuleData
|
|
}
|
|
|
|
//go:linkname findfunc runtime.findfunc
|
|
func findfunc(pc uintptr) funcInfo
|
|
|
|
//go:linkname funcdata runtime.funcdata
|
|
func funcdata(f funcInfo, i uint8) unsafe.Pointer
|
|
|
|
var (
|
|
modLock sync.Mutex
|
|
modList []*_ModuleData
|
|
)
|
|
|
|
var emptyByte byte
|
|
|
|
func encodeVariant(v int) []byte {
|
|
var u int
|
|
var r []byte
|
|
|
|
/* split every 7 bits */
|
|
for v > 127 {
|
|
u = v & 0x7f
|
|
v = v >> 7
|
|
r = append(r, byte(u) | 0x80)
|
|
}
|
|
|
|
/* check for last one */
|
|
if v == 0 {
|
|
return r
|
|
}
|
|
|
|
/* add the last one */
|
|
r = append(r, byte(v))
|
|
return r
|
|
}
|
|
|
|
func registerModule(mod *_ModuleData) {
|
|
modLock.Lock()
|
|
modList = append(modList, mod)
|
|
lastmoduledatap.next = mod
|
|
lastmoduledatap = mod
|
|
modLock.Unlock()
|
|
}
|
|
|
|
func stackMap(f interface{}) (args uintptr, locals uintptr) {
|
|
fv := reflect.ValueOf(f)
|
|
if fv.Kind() != reflect.Func {
|
|
panic("f must be reflect.Func kind!")
|
|
}
|
|
fi := findfunc(fv.Pointer())
|
|
return uintptr(funcdata(fi, uint8(_FUNCDATA_ArgsPointerMaps))), uintptr(funcdata(fi, uint8(_FUNCDATA_LocalsPointerMaps)))
|
|
}
|
|
|
|
var moduleCache = struct{
|
|
m map[*_ModuleData][]byte
|
|
l sync.Mutex
|
|
}{
|
|
m : make(map[*_ModuleData][]byte),
|
|
}
|
|
|
|
func cacheStackmap(argPtrs []bool, localPtrs []bool, mod *_ModuleData) (argptrs uintptr, localptrs uintptr) {
|
|
as := rt.StackMapBuilder{}
|
|
for _, b := range argPtrs {
|
|
as.AddField(b)
|
|
}
|
|
ab, _ := as.Build().MarshalBinary()
|
|
ls := rt.StackMapBuilder{}
|
|
for _, b := range localPtrs {
|
|
ls.AddField(b)
|
|
}
|
|
lb, _ := ls.Build().MarshalBinary()
|
|
cache := make([]byte, len(ab) + len(lb))
|
|
copy(cache, ab)
|
|
copy(cache[len(ab):], lb)
|
|
moduleCache.l.Lock()
|
|
moduleCache.m[mod] = cache
|
|
moduleCache.l.Unlock()
|
|
return uintptr(rt.IndexByte(cache, 0)), uintptr(rt.IndexByte(cache, len(ab)))
|
|
|
|
} |