go counters_supported 源码
golang counters_supported 代码
文件路径：/src/internal/fuzz/counters_supported.go
// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build (darwin || linux || windows || freebsd) && (amd64 || arm64)
package fuzz
import (
"internal/unsafeheader"
"unsafe"
)
// coverage returns a []byte containing unique 8-bit counters for each edge of
// the instrumented source code. This coverage data will only be generated if
// `-d=libfuzzer` is set at build time. This can be used to understand the code
// coverage of a test execution.
func coverage() []byte {
addr := unsafe.Pointer(&_counters)
size := uintptr(unsafe.Pointer(&_ecounters)) - uintptr(addr)
var res []byte
*(*unsafeheader.Slice)(unsafe.Pointer(&res)) = unsafeheader.Slice{
Data: addr,
Len: int(size),
Cap: int(size),
}
return res
}
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