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// Copyright 2019 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 logopt
import (
"internal/testenv"
"os"
"path/filepath"
"runtime"
"strings"
"testing"
)
const srcCode = `package x
type pair struct {a,b int}
func bar(y *pair) *int {
return &y.b
}
var a []int
func foo(w, z *pair) *int {
if *bar(w) > 0 {
return bar(z)
}
if a[1] > 0 {
a = a[:2]
}
return &a[0]
}
// address taking prevents closure inlining
func n() int {
foo := func() int { return 1 }
bar := &foo
x := (*bar)() + foo()
return x
}
`
func want(t *testing.T, out string, desired string) {
// On Windows, Unicode escapes in the JSON output end up "normalized" elsewhere to /u....,
// so "normalize" what we're looking for to match that.
s := strings.ReplaceAll(desired, string(os.PathSeparator), "/")
if !strings.Contains(out, s) {
t.Errorf("did not see phrase %s in \n%s", s, out)
}
}
func wantN(t *testing.T, out string, desired string, n int) {
if strings.Count(out, desired) != n {
t.Errorf("expected exactly %d occurrences of %s in \n%s", n, desired, out)
}
}
func TestPathStuff(t *testing.T) {
sep := string(filepath.Separator)
if path, whine := parseLogPath("file:///c:foo"); path != "c:foo" || whine != "" { // good path
t.Errorf("path='%s', whine='%s'", path, whine)
}
if path, whine := parseLogPath("file:///foo"); path != sep+"foo" || whine != "" { // good path
t.Errorf("path='%s', whine='%s'", path, whine)
}
if path, whine := parseLogPath("foo"); path != "" || whine == "" { // BAD path
t.Errorf("path='%s', whine='%s'", path, whine)
}
if sep == "\\" { // On WINDOWS ONLY
if path, whine := parseLogPath("C:/foo"); path != "C:\\foo" || whine != "" { // good path
t.Errorf("path='%s', whine='%s'", path, whine)
}
if path, whine := parseLogPath("c:foo"); path != "" || whine == "" { // BAD path
t.Errorf("path='%s', whine='%s'", path, whine)
}
if path, whine := parseLogPath("/foo"); path != "" || whine == "" { // BAD path
t.Errorf("path='%s', whine='%s'", path, whine)
}
} else { // ON UNIX ONLY
if path, whine := parseLogPath("/foo"); path != sep+"foo" || whine != "" { // good path
t.Errorf("path='%s', whine='%s'", path, whine)
}
}
}
func TestLogOpt(t *testing.T) {
t.Parallel()
testenv.MustHaveGoBuild(t)
dir := fixSlash(t.TempDir()) // Normalize the directory name as much as possible, for Windows testing
src := filepath.Join(dir, "file.go")
if err := os.WriteFile(src, []byte(srcCode), 0644); err != nil {
t.Fatal(err)
}
outfile := filepath.Join(dir, "file.o")
t.Run("JSON_fails", func(t *testing.T) {
// Test malformed flag
out, err := testLogOpt(t, "-json=foo", src, outfile)
if err == nil {
t.Error("-json=foo succeeded unexpectedly")
}
want(t, out, "option should be")
want(t, out, "number")
// Test a version number that is currently unsupported (and should remain unsupported for a while)
out, err = testLogOpt(t, "-json=9,foo", src, outfile)
if err == nil {
t.Error("-json=0,foo succeeded unexpectedly")
}
want(t, out, "version must be")
})
// replace d (dir) with t ("tmpdir") and convert path separators to '/'
normalize := func(out []byte, d, t string) string {
s := string(out)
s = strings.ReplaceAll(s, d, t)
s = strings.ReplaceAll(s, string(os.PathSeparator), "/")
return s
}
// Ensure that <128 byte copies are not reported and that 128-byte copies are.
// Check at both 1 and 8-byte alignments.
t.Run("Copy", func(t *testing.T) {
const copyCode = `package x
func s128a1(x *[128]int8) [128]int8 {
return *x
}
func s127a1(x *[127]int8) [127]int8 {
return *x
}
func s16a8(x *[16]int64) [16]int64 {
return *x
}
func s15a8(x *[15]int64) [15]int64 {
return *x
}
`
copy := filepath.Join(dir, "copy.go")
if err := os.WriteFile(copy, []byte(copyCode), 0644); err != nil {
t.Fatal(err)
}
outcopy := filepath.Join(dir, "copy.o")
// On not-amd64, test the host architecture and os
arches := []string{runtime.GOARCH}
goos0 := runtime.GOOS
if runtime.GOARCH == "amd64" { // Test many things with "linux" (wasm will get "js")
arches = []string{"arm", "arm64", "386", "amd64", "mips", "mips64", "loong64", "ppc64le", "riscv64", "s390x", "wasm"}
goos0 = "linux"
}
for _, arch := range arches {
t.Run(arch, func(t *testing.T) {
goos := goos0
if arch == "wasm" {
goos = "js"
}
_, err := testCopy(t, dir, arch, goos, copy, outcopy)
if err != nil {
t.Error("-json=0,file://log/opt should have succeeded")
}
logged, err := os.ReadFile(filepath.Join(dir, "log", "opt", "x", "copy.json"))
if err != nil {
t.Error("-json=0,file://log/opt missing expected log file")
}
slogged := normalize(logged, string(uriIfy(dir)), string(uriIfy("tmpdir")))
t.Logf("%s", slogged)
want(t, slogged, `{"range":{"start":{"line":3,"character":2},"end":{"line":3,"character":2}},"severity":3,"code":"copy","source":"go compiler","message":"128 bytes"}`)
want(t, slogged, `{"range":{"start":{"line":9,"character":2},"end":{"line":9,"character":2}},"severity":3,"code":"copy","source":"go compiler","message":"128 bytes"}`)
wantN(t, slogged, `"code":"copy"`, 2)
})
}
})
// Some architectures don't fault on nil dereference, so nilchecks are eliminated differently.
// The N-way copy test also doesn't need to run N-ways N times.
if runtime.GOARCH != "amd64" {
return
}
t.Run("Success", func(t *testing.T) {
// This test is supposed to succeed
// Note 'file://' is the I-Know-What-I-Am-Doing way of specifying a file, also to deal with corner cases for Windows.
_, err := testLogOptDir(t, dir, "-json=0,file://log/opt", src, outfile)
if err != nil {
t.Error("-json=0,file://log/opt should have succeeded")
}
logged, err := os.ReadFile(filepath.Join(dir, "log", "opt", "x", "file.json"))
if err != nil {
t.Error("-json=0,file://log/opt missing expected log file")
}
// All this delicacy with uriIfy and filepath.Join is to get this test to work right on Windows.
slogged := normalize(logged, string(uriIfy(dir)), string(uriIfy("tmpdir")))
t.Logf("%s", slogged)
// below shows proper nilcheck
want(t, slogged, `{"range":{"start":{"line":9,"character":13},"end":{"line":9,"character":13}},"severity":3,"code":"nilcheck","source":"go compiler","message":"",`+
`"relatedInformation":[{"location":{"uri":"file://tmpdir/file.go","range":{"start":{"line":4,"character":11},"end":{"line":4,"character":11}}},"message":"inlineLoc"}]}`)
want(t, slogged, `{"range":{"start":{"line":11,"character":6},"end":{"line":11,"character":6}},"severity":3,"code":"isInBounds","source":"go compiler","message":""}`)
want(t, slogged, `{"range":{"start":{"line":7,"character":6},"end":{"line":7,"character":6}},"severity":3,"code":"canInlineFunction","source":"go compiler","message":"cost: 35"}`)
// escape analysis explanation
want(t, slogged, `{"range":{"start":{"line":7,"character":13},"end":{"line":7,"character":13}},"severity":3,"code":"leak","source":"go compiler","message":"parameter z leaks to ~r0 with derefs=0",`+
`"relatedInformation":[`+
`{"location":{"uri":"file://tmpdir/file.go","range":{"start":{"line":9,"character":13},"end":{"line":9,"character":13}}},"message":"escflow: flow: y = z:"},`+
`{"location":{"uri":"file://tmpdir/file.go","range":{"start":{"line":9,"character":13},"end":{"line":9,"character":13}}},"message":"escflow: from y := z (assign-pair)"},`+
`{"location":{"uri":"file://tmpdir/file.go","range":{"start":{"line":9,"character":13},"end":{"line":9,"character":13}}},"message":"escflow: flow: ~r0 = y:"},`+
`{"location":{"uri":"file://tmpdir/file.go","range":{"start":{"line":4,"character":11},"end":{"line":4,"character":11}}},"message":"inlineLoc"},`+
`{"location":{"uri":"file://tmpdir/file.go","range":{"start":{"line":9,"character":13},"end":{"line":9,"character":13}}},"message":"escflow: from y.b (dot of pointer)"},`+
`{"location":{"uri":"file://tmpdir/file.go","range":{"start":{"line":4,"character":11},"end":{"line":4,"character":11}}},"message":"inlineLoc"},`+
`{"location":{"uri":"file://tmpdir/file.go","range":{"start":{"line":9,"character":13},"end":{"line":9,"character":13}}},"message":"escflow: from \u0026y.b (address-of)"},`+
`{"location":{"uri":"file://tmpdir/file.go","range":{"start":{"line":4,"character":9},"end":{"line":4,"character":9}}},"message":"inlineLoc"},`+
`{"location":{"uri":"file://tmpdir/file.go","range":{"start":{"line":9,"character":13},"end":{"line":9,"character":13}}},"message":"escflow: from ~r0 = \u0026y.b (assign-pair)"},`+
`{"location":{"uri":"file://tmpdir/file.go","range":{"start":{"line":9,"character":3},"end":{"line":9,"character":3}}},"message":"escflow: flow: ~r0 = ~r0:"},`+
`{"location":{"uri":"file://tmpdir/file.go","range":{"start":{"line":9,"character":3},"end":{"line":9,"character":3}}},"message":"escflow: from return ~r0 (return)"}]}`)
})
}
func testLogOpt(t *testing.T, flag, src, outfile string) (string, error) {
run := []string{testenv.GoToolPath(t), "tool", "compile", "-p=p", flag, "-o", outfile, src}
t.Log(run)
cmd := testenv.Command(t, run[0], run[1:]...)
out, err := cmd.CombinedOutput()
t.Logf("%s", out)
return string(out), err
}
func testLogOptDir(t *testing.T, dir, flag, src, outfile string) (string, error) {
// Notice the specified import path "x"
run := []string{testenv.GoToolPath(t), "tool", "compile", "-p=x", flag, "-o", outfile, src}
t.Log(run)
cmd := testenv.Command(t, run[0], run[1:]...)
cmd.Dir = dir
out, err := cmd.CombinedOutput()
t.Logf("%s", out)
return string(out), err
}
func testCopy(t *testing.T, dir, goarch, goos, src, outfile string) (string, error) {
// Notice the specified import path "x"
run := []string{testenv.GoToolPath(t), "tool", "compile", "-p=x", "-json=0,file://log/opt", "-o", outfile, src}
t.Log(run)
cmd := testenv.Command(t, run[0], run[1:]...)
cmd.Dir = dir
cmd.Env = append(os.Environ(), "GOARCH="+goarch, "GOOS="+goos)
out, err := cmd.CombinedOutput()
t.Logf("%s", out)
return string(out), err
}
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