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// Copyright 2020 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.
// syz-base-commit is a tool for debugging the blob-based base commit detection functionality.
package main
import (
"flag"
"log"
"os"
"github.com/google/syzkaller/pkg/debugtracer"
"github.com/google/syzkaller/pkg/tool"
"github.com/google/syzkaller/pkg/vcs"
)
var (
flagRepo = flag.String("sourcedir", "", "path to the Linux kernel repository")
)
func main() {
defer tool.Init()()
args := flag.Args()
if *flagRepo == "" || len(args) != 1 {
tool.Failf("expected format: syz-base-commit --sourcedir ./linux-repo some-patch.diff")
}
log.Printf("note: the tool runs much faster after a `git commit-graph write --reachable`")
diff, err := os.ReadFile(args[0])
if err != nil {
tool.Fail(err)
}
git := &vcs.Git{
Dir: *flagRepo,
}
commits, err := git.BaseForDiff(diff, &debugtracer.GenericTracer{
TraceWriter: os.Stderr,
})
if err != nil {
tool.Fail(err)
}
if len(commits) == 0 {
log.Printf("no suitable commits found!")
os.Exit(0)
}
log.Printf("found %d candidates:", len(commits))
for _, commit := range commits {
log.Printf("%+v %v", commit.Commit, commit.Branches)
}
}
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