github.com/fafucoder/cilium@v1.6.11/tools/alignchecker/main.go (about)

     1  // Copyright 2019 Authors of Cilium
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package main
    16  
    17  import (
    18  	"fmt"
    19  	"os"
    20  
    21  	"github.com/cilium/cilium/pkg/datapath/alignchecker"
    22  )
    23  
    24  func main() {
    25  	if len(os.Args) != 2 {
    26  		fmt.Fprintf(os.Stderr, "usage: %s <path>\n", os.Args[0])
    27  		os.Exit(1)
    28  	}
    29  
    30  	bpfObjPath := os.Args[1]
    31  	if _, err := os.Stat(bpfObjPath); err != nil {
    32  		fmt.Fprintf(os.Stderr, "Cannot check alignment against %s: %s\n", bpfObjPath, err)
    33  		os.Exit(1)
    34  	}
    35  	if err := alignchecker.CheckStructAlignments(bpfObjPath); err != nil {
    36  		fmt.Fprintf(os.Stderr, "C and Go structs alignment check failed: %s\n", err)
    37  		os.Exit(1)
    38  	}
    39  	fmt.Fprintf(os.Stdout, "OK\n")
    40  }