github.com/bytedance/mockey@v1.2.10/internal/monkey/mem/write_linux.go (about)

     1  /*
     2   * Copyright 2022 ByteDance Inc.
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package mem
    18  
    19  import (
    20  	"fmt"
    21  	"reflect"
    22  	"syscall"
    23  
    24  	"github.com/bytedance/mockey/internal/monkey/common"
    25  	"github.com/bytedance/mockey/internal/tool"
    26  )
    27  
    28  func Write(target uintptr, data []byte) error {
    29  	targetPage := common.PageOf(target)
    30  	fnPage := common.PageOf(reflect.ValueOf(write).Pointer())
    31  	tool.DebugPrintf("Write: target page(0x%x), fn page(0x%x), len(%v)\n", targetPage, fnPage, len(data))
    32  	res := write(target, common.PtrOf(data), len(data), targetPage, common.PageSize(), syscall.PROT_READ|syscall.PROT_EXEC)
    33  	if res != 0 {
    34  		return fmt.Errorf("write failed, code %v", res)
    35  	}
    36  	return nil
    37  }
    38  
    39  func write(target, data uintptr, len int, page uintptr, pageSize, oriProt int) int