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coverage_runner_template.txt
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coverage_runner_template.txt
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// Copyright 2020 Google LLC
//
// 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 mypackagebeingfuzzed
import (
"fmt"
"io/fs"
"io/ioutil"
"os"
"path/filepath"
"reflect"
"runtime/pprof"
"testing"
"github.com/holiman/gofuzz-shim/input"
)
func TestFuzzCorpus(t *testing.T) {
var (
dir = os.Getenv("FUZZ_CORPUS_DIR")
profname = os.Getenv("FUZZ_PROFILE_NAME")
filename string
)
if dir == "" {
t.Logf("No corpus-directory set")
return
}
_, err := ioutil.ReadDir(dir)
if err != nil {
t.Logf("Error reading corpus-directory ($FUZZ_CORPUS_DIR:%q): %v", dir, err)
return
}
if profname != "" {
f, err := os.Create(profname + ".cpu.prof")
if err != nil {
t.Logf("error creating profile file: %v\n", err)
} else {
_ = pprof.StartCPUProfile(f)
defer func() {
pprof.StopCPUProfile()
f, err := os.Create(profname + ".heap.prof")
if err != nil {
t.Logf("error creating heap profile file %s\n", err)
}
if err = pprof.WriteHeapProfile(f); err != nil {
t.Logf("error writing heap profile file %s\n", err)
}
f.Close()
}()
}
}
defer func() {
if r := recover(); r != nil {
t.Errorf("Fuzz panic in %v: %v", filename, r)
}
}()
// recurse for regressions subdirectory
err = filepath.Walk(dir, func(fname string, info fs.FileInfo, err error) error {
if info.IsDir() {
return nil
}
data, err := ioutil.ReadFile(fname)
if err != nil {
return fmt.Errorf("error reading corpusfile: %w", err)
}
filename = fname
src := input.NewSource(data)
src.FillAndCall(FuzzFunction, reflect.ValueOf(t))
return nil
})
if err != nil {
t.Errorf("Failed to run corpus: %v", err)
}
}