// Copyright 2022 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.

package stringtab

import (
	"fmt"
	"internal/coverage/slicereader"
	"internal/coverage/uleb128"
	"io"
)

// This package implements string table writer and reader utilities,
// for use in emitting and reading/decoding coverage meta-data and
// counter-data files.

	"encoding/binary"
	"fmt"
	"internal/coverage"
	"internal/coverage/slicereader"
	"internal/coverage/stringtab"
	"io"
	"os"
)

// See comments in the encodecovmeta package for details on the format.

type CoverageMetaDataDecoder struct {
	r      *slicereader.Reader
	hdr    coverage.MetaSymbolHeader
	strtab *stringtab.Reader
	tmp    []byte
	debug  bool
}

	"internal/coverage/slicereader"
	"internal/coverage/stringtab"
	"io"
	"os"
)

// CoverageMetaFileReader provides state and methods for reading
// a meta-data file from a code coverage run.
type CoverageMetaFileReader struct {
	f          *os.File
	hdr        coverage.MetaFileHeader
	tmp        []byte
	pkgOffsets []uint64
	pkgLengths []uint64
	strtab     *stringtab.Reader
	fileRdr    *bufio.Reader
	fileView   []byte

type CoverageDataWriter struct {
	stab    *stringtab.Writer
	w       *bufio.Writer
	csh     coverage.CounterSegmentHeader
	tmp     []byte
	cflavor coverage.CounterFlavor
	segs    uint32
	debug   bool
}

func NewCoverageDataWriter(w io.Writer, flav coverage.CounterFlavor) *CoverageDataWriter {
	r := &CoverageDataWriter{
		stab: &stringtab.Writer{},
		w:    bufio.NewWriter(w),

	"fmt"
	"internal/coverage"
	"internal/coverage/stringtab"
	"io"
	"os"
	"unsafe"
)

// This package contains APIs and helpers for writing out a meta-data
// file (composed of a file header, offsets/lengths, and then a series of
// meta-data blobs emitted by the compiler, one per Go package).

type CoverageMetaFileWriter struct {
	stab   stringtab.Writer
	mfname string
	w      *bufio.Writer
	tmp    []byte

// instrumentation is turned on.

import (
	"bytes"
	"crypto/md5"
	"encoding/binary"
	"fmt"
	"hash"
	"internal/coverage"
	"internal/coverage/stringtab"
	"internal/coverage/uleb128"
	"io"
	"os"
)

type CoverageMetaDataBuilder struct {
	stab    stringtab.Writer
	funcs   []funcDesc
	tmp     []byte // temp work slice
	h       hash.Hash
	pkgpath uint32
	pkgname uint32
	modpath uint32
	debug   bool

	"fmt"
	"internal/coverage"
	"internal/coverage/slicereader"
	"internal/coverage/stringtab"
	"io"
	"os"
	"strconv"
	"unsafe"
)

// This file contains helpers for reading counter data files created
// during the executions of a coverage-instrumented binary.

type CounterDataReader struct {
	stab     *stringtab.Reader
	args     map[string]string
	osargs   []string

	// together. If they are, we want to find out immediately.
	lockInit(&trace.stringTab[0].lock, lockRankTraceStrings)
	lockInit(&trace.stringTab[0].tab.mem.lock, lockRankTraceStrings)
	lockInit(&trace.stringTab[1].lock, lockRankTraceStrings)
	lockInit(&trace.stringTab[1].tab.mem.lock, lockRankTraceStrings)
	lockInit(&trace.stackTab[0].tab.mem.lock, lockRankTraceStackTab)

func (tl traceLocker) string(s string) traceArg {
	return traceArg(trace.stringTab[tl.gen%2].put(tl.gen, s))
}

// uniqueString returns a traceArg representing s which may be passed to write.
// The string is assumed to be unique or long, so it will be written out to
// the trace eagerly.
func (tl traceLocker) uniqueString(s string) traceArg {
	return traceArg(trace.stringTab[tl.gen%2].emit(tl.gen, s))
}

	fn := f.Function
	const maxLen = 1 << 10
	if len(fn) > maxLen {
		fn = fn[len(fn)-maxLen:]
	}
	frame.funcID = trace.stringTab[gen%2].put(gen, fn)
	frame.line = uint64(f.Line)
	file := f.File
	if len(file) > maxLen {
		file = file[len(file)-maxLen:]
	}
	frame.fileID = trace.stringTab[gen%2].put(gen, file)
	return frame
}

// tracefpunwindoff returns true if frame pointer unwinding for the tracer is