mirror of git://gcc.gnu.org/git/gcc.git
142 lines
3.4 KiB
Go
142 lines
3.4 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package trace
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import (
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"bytes"
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"io/ioutil"
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"path/filepath"
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"strings"
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"testing"
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)
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func TestCorruptedInputs(t *testing.T) {
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// These inputs crashed parser previously.
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tests := []string{
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"gotrace\x00\x020",
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"gotrace\x00Q00\x020",
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"gotrace\x00T00\x020",
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"gotrace\x00\xc3\x0200",
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"go 1.5 trace\x00\x00\x00\x00\x020",
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"go 1.5 trace\x00\x00\x00\x00Q00\x020",
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"go 1.5 trace\x00\x00\x00\x00T00\x020",
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"go 1.5 trace\x00\x00\x00\x00\xc3\x0200",
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}
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for _, data := range tests {
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events, err := Parse(strings.NewReader(data), "")
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if err == nil || events != nil {
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t.Fatalf("no error on input: %q", data)
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}
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}
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}
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func TestParseCanned(t *testing.T) {
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files, err := ioutil.ReadDir("./testdata")
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if err != nil {
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t.Fatalf("failed to read ./testdata: %v", err)
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}
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for _, f := range files {
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data, err := ioutil.ReadFile(filepath.Join("./testdata", f.Name()))
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if err != nil {
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t.Fatalf("failed to read input file: %v", err)
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}
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// Instead of Parse that requires a proper binary name for old traces,
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// we use 'parse' that omits symbol lookup if an empty string is given.
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_, _, err = parse(bytes.NewReader(data), "")
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switch {
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case strings.HasSuffix(f.Name(), "_good"):
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if err != nil {
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t.Errorf("failed to parse good trace %v: %v", f.Name(), err)
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}
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case strings.HasSuffix(f.Name(), "_unordered"):
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if err != ErrTimeOrder {
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t.Errorf("unordered trace is not detected %v: %v", f.Name(), err)
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}
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default:
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t.Errorf("unknown input file suffix: %v", f.Name())
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}
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}
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}
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func TestParseVersion(t *testing.T) {
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tests := map[string]int{
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"go 1.5 trace\x00\x00\x00\x00": 1005,
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"go 1.7 trace\x00\x00\x00\x00": 1007,
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"go 1.10 trace\x00\x00\x00": 1010,
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"go 1.25 trace\x00\x00\x00": 1025,
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"go 1.234 trace\x00\x00": 1234,
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"go 1.2345 trace\x00": -1,
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"go 0.0 trace\x00\x00\x00\x00": -1,
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"go a.b trace\x00\x00\x00\x00": -1,
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}
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for header, ver := range tests {
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ver1, err := parseHeader([]byte(header))
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if ver == -1 {
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if err == nil {
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t.Fatalf("no error on input: %q, version %v", header, ver1)
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}
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} else {
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if err != nil {
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t.Fatalf("failed to parse: %q (%v)", header, err)
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}
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if ver != ver1 {
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t.Fatalf("wrong version: %v, want %v, input: %q", ver1, ver, header)
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}
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}
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}
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}
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func TestTimestampOverflow(t *testing.T) {
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// Test that parser correctly handles large timestamps (long tracing).
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w := newWriter()
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w.emit(EvBatch, 0, 0)
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w.emit(EvFrequency, 1e9)
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for ts := uint64(1); ts < 1e16; ts *= 2 {
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w.emit(EvGoCreate, ts, ts, 0, 0)
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}
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if _, err := Parse(w, ""); err != nil {
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t.Fatalf("failed to parse: %v", err)
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}
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}
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type writer struct {
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bytes.Buffer
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}
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func newWriter() *writer {
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w := new(writer)
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w.Write([]byte("go 1.7 trace\x00\x00\x00\x00"))
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return w
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}
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func (w *writer) emit(typ byte, args ...uint64) {
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nargs := byte(len(args)) - 1
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if nargs > 3 {
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nargs = 3
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}
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buf := []byte{typ | nargs<<6}
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if nargs == 3 {
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buf = append(buf, 0)
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}
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for _, a := range args {
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buf = appendVarint(buf, a)
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}
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if nargs == 3 {
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buf[1] = byte(len(buf) - 2)
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}
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n, err := w.Write(buf)
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if n != len(buf) || err != nil {
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panic("failed to write")
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}
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}
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func appendVarint(buf []byte, v uint64) []byte {
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for ; v >= 0x80; v >>= 7 {
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buf = append(buf, 0x80|byte(v))
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}
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buf = append(buf, byte(v))
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return buf
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}
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