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cmd/compile: improved format string handling, faster operation
- only accept a-z, A-Z as format verbs - blacklist vendored math package (no need to include it) Change-Id: Ica0fcbfe712369f79dd1d3472dfd4759b8bc3752 Reviewed-on: https://go-review.googlesource.com/28953 Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
Robert Griesemer
parent
8458a387e3
commit
af8ca3387a
1 changed files with 50 additions and 112 deletions
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@ -62,7 +62,7 @@ var (
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fset = token.NewFileSet()
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formatStrings = make(map[*ast.BasicLit]bool) // set of all potential format strings found
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foundFormats = make(map[string]bool) // set of all formats found
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callSites = make(map[*ast.CallExpr]*callSite) // set of all calls using format strings
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callSites = make(map[*ast.CallExpr]*callSite) // map of all calls
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)
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// A File is a corresponding (filename, ast) pair.
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@ -82,6 +82,10 @@ func TestFormats(t *testing.T) {
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}
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importPath := filepath.Join("cmd/compile", path)
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if blacklistedPackages[filepath.ToSlash(importPath)] {
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return filepath.SkipDir
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}
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pkg, err := build.Import(importPath, path, 0)
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if err != nil {
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if _, ok := err.(*build.NoGoError); ok {
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@ -295,7 +299,7 @@ func collectPkgFormats(t *testing.T, pkg *build.Package) {
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ast.Inspect(file, func(n ast.Node) bool {
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if call, ok := n.(*ast.CallExpr); ok {
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// ignore blacklisted functions
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if functionBlacklisted[nodeString(call.Fun)] {
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if blacklistedFunctions[nodeString(call.Fun)] {
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return true
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}
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// look for an arguments that might be a format string
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@ -363,12 +367,7 @@ func nodeString(n ast.Node) string {
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// typeString returns a string representation of n.
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func typeString(typ types.Type) string {
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s := typ.String()
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// canonicalize path separators
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if filepath.Separator != '/' {
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s = strings.Replace(s, string(filepath.Separator), "/", -1)
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}
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return s
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return filepath.ToSlash(typ.String())
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}
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// stringLit returns the unquoted string value and true if
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@ -449,14 +448,9 @@ func formatIter(s string, f func(i, j int) int) {
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digits()
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}
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index()
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// accept any char except for % as format flag
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if r == '%' {
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if i-i0 == 1 {
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continue // skip "%%"
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}
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log.Fatalf("incorrect format string: %s", s)
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}
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if r >= 0 {
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// accept any letter (a-z, A-Z) as format verb;
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// ignore anything else
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if 'a' <= r && r <= 'z' || 'A' <= r && r <= 'Z' {
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i = f(i0-1, i)
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}
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}
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@ -509,14 +503,16 @@ func formatReplace(in string, f func(i int, s string) string) string {
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return string(append(buf, in[i0:]...))
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}
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// functionBlacklisted is the set of functions which may have
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// blacklistedPackages is the set of packages which can
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// be ignored.
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var blacklistedPackages = map[string]bool{
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"cmd/compile/internal/big": true,
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}
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// blacklistedFunctions is the set of functions which may have
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// format-like arguments but which don't do any formatting and
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// thus may be ignored.
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var functionBlacklisted = map[string]bool{
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"len": true,
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"strings.ContainsRune": true,
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"w.WriteString": true,
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}
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var blacklistedFunctions = map[string]bool{}
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func init() {
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// verify that knownFormats entries are correctly formatted
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@ -534,25 +530,13 @@ func init() {
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}
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}
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// knownFormats entries are of the form "typename oldformat" -> "newformat".
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// knownFormats entries are of the form "typename format" -> "newformat".
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// An absent entry means that the format is not recognized as valid.
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// An empty new format means that the existing format should remain unchanged.
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// An empty new format means that the format should remain unchanged.
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// To print out a new table, run: go test -run Formats -v.
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var knownFormats = map[string]string{
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"**cmd/compile/internal/big.Rat %v": "",
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"*bytes.Buffer %s": "",
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"*cmd/compile/internal/big.Float %5s": "",
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"*cmd/compile/internal/big.Float %s": "",
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"*cmd/compile/internal/big.Float %v": "",
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"*cmd/compile/internal/big.Int %#x": "",
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"*cmd/compile/internal/big.Int %d": "",
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"*cmd/compile/internal/big.Int %s": "",
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"*cmd/compile/internal/big.Int %v": "",
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"*cmd/compile/internal/big.Int %x": "",
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"*cmd/compile/internal/big.Rat %p": "",
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"*cmd/compile/internal/big.Rat %s": "",
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"*cmd/compile/internal/big.Rat %v": "",
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"*cmd/compile/internal/big.matrix %s": "",
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"*cmd/compile/internal/gc.Bits %v": "",
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"*cmd/compile/internal/gc.Field %p": "",
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"*cmd/compile/internal/gc.Field %v": "",
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@ -600,12 +584,9 @@ var knownFormats = map[string]string{
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"*cmd/internal/obj.Prog %s": "",
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"*cmd/internal/obj.Prog %v": "",
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"[16]byte %x": "",
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"[]*cmd/compile/internal/big.Int %s": "",
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"[]*cmd/compile/internal/big.Rat %s": "",
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"[]*cmd/compile/internal/gc.Node %v": "",
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"[]*cmd/compile/internal/gc.Sig %#v": "",
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"[]*cmd/compile/internal/ssa.Value %v": "",
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"[]byte %q": "",
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"[]byte %s": "",
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"[]byte %x": "",
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"[]cmd/compile/internal/ssa.Edge %v": "",
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@ -616,29 +597,7 @@ var knownFormats = map[string]string{
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"byte %02x": "",
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"byte %08b": "",
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"byte %c": "",
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"byte %d": "",
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"byte %q": "",
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"cmd/compile/internal/arm.shift %d": "",
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"cmd/compile/internal/big.Accuracy %d": "",
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"cmd/compile/internal/big.Accuracy %s": "",
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"cmd/compile/internal/big.Bits %v": "",
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"cmd/compile/internal/big.ErrNaN %v": "",
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"cmd/compile/internal/big.Int %v": "",
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"cmd/compile/internal/big.RoundingMode %d": "",
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"cmd/compile/internal/big.RoundingMode %s": "",
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"cmd/compile/internal/big.RoundingMode %v": "",
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"cmd/compile/internal/big.Word %#x": "",
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"cmd/compile/internal/big.Word %d": "",
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"cmd/compile/internal/big.Word %x": "",
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"cmd/compile/internal/big.argNN %+v": "",
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"cmd/compile/internal/big.argVV %+v": "",
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"cmd/compile/internal/big.argVW %+v": "",
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"cmd/compile/internal/big.argVWW %+v": "",
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"cmd/compile/internal/big.argWVW %+v": "",
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"cmd/compile/internal/big.argWW %+v": "",
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"cmd/compile/internal/big.argZZ %+v": "",
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"cmd/compile/internal/big.decimal %v": "",
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"cmd/compile/internal/big.nat %v": "",
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"cmd/compile/internal/gc.Class %d": "",
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"cmd/compile/internal/gc.Ctype %d": "",
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"cmd/compile/internal/gc.Ctype %v": "",
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@ -686,19 +645,11 @@ var knownFormats = map[string]string{
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"cmd/compile/internal/syntax.token %q": "",
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"cmd/compile/internal/syntax.token %s": "",
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"cmd/internal/obj.As %v": "",
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"error %q": "",
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"error %s": "",
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"error %v": "",
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"float32 %b": "",
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"float32 %g": "",
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"float64 %.2f": "",
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"float64 %.3f": "",
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"float64 %.5g": "",
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"float64 %.6g": "",
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"float64 %5g": "",
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"float64 %b": "",
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"float64 %g": "",
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"float64 %v": "",
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"fmt.Stringer %T": "",
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"int %#x": "",
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"int %-12d": "",
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@ -706,7 +657,6 @@ var knownFormats = map[string]string{
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"int %-6d": "",
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"int %-8o": "",
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"int %2d": "",
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"int %3d": "",
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"int %5d": "",
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"int %6d": "",
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"int %c": "",
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@ -721,7 +671,6 @@ var knownFormats = map[string]string{
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"int32 %d": "",
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"int32 %v": "",
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"int32 %x": "",
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"int64 %#x": "",
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"int64 %+d": "",
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"int64 %-10d": "",
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"int64 %X": "",
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@ -736,45 +685,34 @@ var knownFormats = map[string]string{
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"interface{} %s": "",
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"interface{} %v": "",
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"map[*cmd/compile/internal/gc.Node]*cmd/compile/internal/ssa.Value %v": "",
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"reflect.Type %s": "",
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"rune %#U": "",
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"rune %c": "",
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"rune %d": "",
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"rune %q": "",
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"string %-16s": "",
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"string %.*s": "",
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"string %q": "",
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"string %s": "",
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"string %v": "",
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"struct{format string; value interface{}; want string} %v": "",
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"struct{in string; out string; base int; val int64; ok bool} %v": "",
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"struct{s string; base int; frac bool; x cmd/compile/internal/big.nat; b int; count int; ok bool; next rune} %+v": "",
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"struct{x cmd/compile/internal/big.nat; b int; s string} %+v": "",
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"struct{x float64; format byte; prec int; want string} %v": "",
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"struct{x string; prec uint; format byte; digits int; want string} %v": "",
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"time.Duration %10s": "",
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"time.Duration %4d": "",
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"time.Duration %d": "",
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"time.Duration %v": "",
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"uint %.4d": "",
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"uint %04x": "",
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"uint %d": "",
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"uint %v": "",
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"uint16 %d": "",
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"uint16 %v": "",
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"uint16 %x": "",
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"uint32 %#08x": "",
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"uint32 %#x": "",
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"uint32 %08x": "",
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"uint32 %d": "",
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"uint32 %x": "",
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"uint64 %#016x": "",
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"uint64 %#x": "",
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"uint64 %016x": "",
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"uint64 %08x": "",
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"uint64 %d": "",
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"uint64 %x": "",
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"uint8 %d": "",
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"uint8 %x": "",
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"uintptr %d": "",
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"reflect.Type %s": "",
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"rune %#U": "",
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"rune %c": "",
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"rune %d": "",
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"string %-16s": "",
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"string %.*s": "",
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"string %q": "",
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"string %s": "",
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"string %v": "",
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"time.Duration %d": "",
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"time.Duration %v": "",
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"uint %.4d": "",
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"uint %04x": "",
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"uint %d": "",
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"uint %v": "",
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"uint16 %d": "",
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"uint16 %v": "",
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"uint16 %x": "",
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"uint32 %#x": "",
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"uint32 %08x": "",
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"uint32 %d": "",
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"uint32 %x": "",
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"uint64 %#x": "",
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"uint64 %016x": "",
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"uint64 %08x": "",
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"uint64 %d": "",
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"uint64 %x": "",
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"uint8 %d": "",
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"uint8 %x": "",
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"uintptr %d": "",
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}
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