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// Copyright 2018 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package report
import (
"bufio"
"bytes"
"fmt"
"path/filepath"
"regexp"
"strconv"
"strings"
"github.com/google/syzkaller/pkg/symbolizer"
)
type openbsd struct {
*config
kernelObject string
symbols map[string][]symbolizer.Symbol
}
var (
openbsdSymbolizeRe = []*regexp.Regexp{
// stack
regexp.MustCompile(` at ([A-Za-z0-9_]+)\+0x([0-9a-f]+)`),
// witness
regexp.MustCompile(`#[0-9]+ +([A-Za-z0-9_]+)\+0x([0-9a-f]+)`),
}
)
func ctorOpenbsd(cfg *config) (Reporter, []string, error) {
var symbols map[string][]symbolizer.Symbol
kernelObject := ""
if cfg.kernelObj != "" {
kernelObject = filepath.Join(cfg.kernelObj, cfg.target.KernelObject)
var err error
symbols, err = symbolizer.ReadSymbols(kernelObject)
if err != nil {
return nil, nil, err
}
}
ctx := &openbsd{
config: cfg,
kernelObject: kernelObject,
symbols: symbols,
}
return ctx, nil, nil
}
func (ctx *openbsd) ContainsCrash(output []byte) bool {
return containsCrash(output, openbsdOopses, ctx.ignores)
}
func (ctx *openbsd) Parse(output []byte) *Report {
stripped := bytes.Replace(output, []byte{'\r', '\n'}, []byte{'\n'}, -1)
stripped = bytes.Replace(stripped, []byte{'\n', '\r'}, []byte{'\n'}, -1)
for len(stripped) != 0 && stripped[0] == '\r' {
stripped = stripped[1:]
}
rep := simpleLineParser(stripped, openbsdOopses, nil, ctx.ignores)
if rep == nil {
return nil
}
rep.Output = output
return rep
}
func (ctx *openbsd) Symbolize(rep *Report) error {
symb := symbolizer.NewSymbolizer()
defer symb.Close()
var symbolized []byte
s := bufio.NewScanner(bytes.NewReader(rep.Report))
prefix := rep.reportPrefixLen
for s.Scan() {
line := append([]byte{}, s.Bytes()...)
line = append(line, '\n')
newLine := ctx.symbolizeLine(symb.Symbolize, line)
if prefix > len(symbolized) {
prefix += len(newLine) - len(line)
}
symbolized = append(symbolized, newLine...)
}
rep.Report = symbolized
rep.reportPrefixLen = prefix
return nil
}
func (ctx *openbsd) symbolizeLine(symbFunc func(bin string, pc uint64) ([]symbolizer.Frame, error),
line []byte) []byte {
var match []int
for _, re := range openbsdSymbolizeRe {
match = re.FindSubmatchIndex(line)
if match != nil {
break
}
}
if match == nil {
return line
}
fn := line[match[2]:match[3]]
off, err := strconv.ParseUint(string(line[match[4]:match[5]]), 16, 64)
if err != nil {
return line
}
symb := ctx.symbols[string(fn)]
if len(symb) == 0 {
return line
}
fnStart := (0xffffffff << 32) | symb[0].Addr
frames, err := symbFunc(ctx.kernelObject, fnStart+off)
if err != nil || len(frames) == 0 {
return line
}
var symbolized []byte
for _, frame := range frames {
file := frame.File
file = strings.TrimPrefix(file, ctx.kernelBuildSrc)
file = strings.TrimPrefix(file, "/")
info := fmt.Sprintf(" %v:%v", file, frame.Line)
modified := append([]byte{}, line...)
modified = replace(modified, match[5], match[5], []byte(info))
if frame.Inline {
end := match[5] + len(info)
modified = replace(modified, end, end, []byte(" [inline]"))
modified = replace(modified, match[5], match[5], []byte(" "+frame.Func))
}
symbolized = append(symbolized, modified...)
}
return symbolized
}
var openbsdOopses = []*oops{
{
[]byte("cleaned vnode"),
[]oopsFormat{
{
title: compile("cleaned vnode: "),
fmt: "panic: cleaned vnode isn't",
},
},
[]*regexp.Regexp{},
},
{
[]byte("panic"),
[]oopsFormat{
{
title: compile("panic: kernel diagnostic assertion (.+) failed: file \".*/([^\"]+)"),
fmt: "assert %[1]v failed in %[2]v",
},
{
title: compile("panic: pool_do_put: ([^:]+): double pool_put"),
fmt: "pool: double put: %[1]v",
},
{
title: compile("panic: pool_do_get: ([^:]+) free list modified"),
fmt: "pool: free list modified: %[1]v",
},
{
title: compile("panic: timeout_add: to_ticks \\(.+\\) < 0"),
fmt: "panic: timeout_add: to_ticks < 0",
},
},
[]*regexp.Regexp{},
},
{
[]byte("lock order reversal:"),
[]oopsFormat{
{
title: compile("lock order reversal:\\n+.*1st {{ADDR}} ([^\\ ]+).*\\n.*2nd {{ADDR}} ([^\\ ]+)"),
fmt: "witness: reversal: %[1]v %[2]v",
},
},
[]*regexp.Regexp{},
},
{
[]byte("witness:"),
[]oopsFormat{
{
title: compile("witness: thread {{ADDR}} exiting with the following locks held:"),
fmt: "witness: thread exiting with locks held",
},
{
title: compile("(witness: .*)"),
fmt: "%[1]v",
},
},
[]*regexp.Regexp{},
},
{
[]byte("uvm_fault"),
[]oopsFormat{
{
title: compile("uvm_fault\\((?:.*\\n)+?.*Stopped at[ ]+([^\\+]+)"),
fmt: "uvm_fault: %[1]v",
},
},
[]*regexp.Regexp{},
},
{
[]byte("kernel:"),
[]oopsFormat{
{
title: compile("kernel: page fault trap, code=0.*\\nStopped at[ ]+([^\\+]+)"),
fmt: "uvm_fault: %[1]v",
},
},
[]*regexp.Regexp{
compile("reorder_kernel"),
},
},
}
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