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https://github.com/golang/go
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cgo: print line numbers in fatal errors when relevant.
Signatures of fatalf and error_ helpers have been matched for consistency. Fixes #1800. R=rsc CC=golang-dev, remy https://golang.org/cl/5593049
This commit is contained in:
Rémy Oudompheng
parent
1c290fda50
commit
0d07600de3
@ -524,6 +524,10 @@ func (p *Package) loadDWARF(f *File, names []*Name) {
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for i, n := range names {
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nameToIndex[n] = i
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}
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nameToRef := make(map[*Name]*Ref)
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for _, ref := range f.Ref {
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nameToRef[ref.Name] = ref
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}
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r := d.Reader()
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for {
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e, err := r.Next()
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@ -597,12 +601,16 @@ func (p *Package) loadDWARF(f *File, names []*Name) {
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if types[i] == nil {
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continue
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}
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pos := token.NoPos
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if ref, ok := nameToRef[n]; ok {
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pos = ref.Pos()
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}
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f, fok := types[i].(*dwarf.FuncType)
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if n.Kind != "type" && fok {
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n.Kind = "func"
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n.FuncType = conv.FuncType(f)
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n.FuncType = conv.FuncType(f, pos)
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} else {
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n.Type = conv.Type(types[i])
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n.Type = conv.Type(types[i], pos)
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if enums[i] != 0 && n.Type.EnumValues != nil {
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k := fmt.Sprintf("__cgo_enum__%d", i)
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n.Kind = "const"
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@ -972,10 +980,10 @@ func (tr *TypeRepr) Set(repr string, fargs ...interface{}) {
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// Type returns a *Type with the same memory layout as
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// dtype when used as the type of a variable or a struct field.
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func (c *typeConv) Type(dtype dwarf.Type) *Type {
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func (c *typeConv) Type(dtype dwarf.Type, pos token.Pos) *Type {
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if t, ok := c.m[dtype]; ok {
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if t.Go == nil {
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fatalf("type conversion loop at %s", dtype)
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fatalf("%s: type conversion loop at %s", lineno(pos), dtype)
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}
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return t
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}
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@ -998,11 +1006,11 @@ func (c *typeConv) Type(dtype dwarf.Type) *Type {
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switch dt := dtype.(type) {
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default:
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fatalf("unexpected type: %s", dtype)
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fatalf("%s: unexpected type: %s", lineno(pos), dtype)
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case *dwarf.AddrType:
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if t.Size != c.ptrSize {
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fatalf("unexpected: %d-byte address type - %s", t.Size, dtype)
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fatalf("%s: unexpected: %d-byte address type - %s", lineno(pos), t.Size, dtype)
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}
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t.Go = c.uintptr
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t.Align = t.Size
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@ -1017,7 +1025,7 @@ func (c *typeConv) Type(dtype dwarf.Type) *Type {
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Len: c.intExpr(dt.Count),
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}
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t.Go = gt // publish before recursive call
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sub := c.Type(dt.Type)
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sub := c.Type(dt.Type, pos)
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t.Align = sub.Align
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gt.Elt = sub.Go
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t.C.Set("typeof(%s[%d])", sub.C, dt.Count)
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@ -1028,7 +1036,7 @@ func (c *typeConv) Type(dtype dwarf.Type) *Type {
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case *dwarf.CharType:
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if t.Size != 1 {
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fatalf("unexpected: %d-byte char type - %s", t.Size, dtype)
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fatalf("%s: unexpected: %d-byte char type - %s", lineno(pos), t.Size, dtype)
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}
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t.Go = c.int8
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t.Align = 1
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@ -1048,7 +1056,7 @@ func (c *typeConv) Type(dtype dwarf.Type) *Type {
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}
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switch t.Size + int64(signed) {
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default:
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fatalf("unexpected: %d-byte enum type - %s", t.Size, dtype)
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fatalf("%s: unexpected: %d-byte enum type - %s", lineno(pos), t.Size, dtype)
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case 1:
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t.Go = c.uint8
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case 2:
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@ -1070,7 +1078,7 @@ func (c *typeConv) Type(dtype dwarf.Type) *Type {
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case *dwarf.FloatType:
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switch t.Size {
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default:
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fatalf("unexpected: %d-byte float type - %s", t.Size, dtype)
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fatalf("%s: unexpected: %d-byte float type - %s", lineno(pos), t.Size, dtype)
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case 4:
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t.Go = c.float32
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case 8:
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@ -1083,7 +1091,7 @@ func (c *typeConv) Type(dtype dwarf.Type) *Type {
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case *dwarf.ComplexType:
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switch t.Size {
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default:
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fatalf("unexpected: %d-byte complex type - %s", t.Size, dtype)
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fatalf("%s: unexpected: %d-byte complex type - %s", lineno(pos), t.Size, dtype)
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case 8:
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t.Go = c.complex64
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case 16:
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@ -1101,11 +1109,11 @@ func (c *typeConv) Type(dtype dwarf.Type) *Type {
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case *dwarf.IntType:
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if dt.BitSize > 0 {
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fatalf("unexpected: %d-bit int type - %s", dt.BitSize, dtype)
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fatalf("%s: unexpected: %d-bit int type - %s", lineno(pos), dt.BitSize, dtype)
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}
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switch t.Size {
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default:
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fatalf("unexpected: %d-byte int type - %s", t.Size, dtype)
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fatalf("%s: unexpected: %d-byte int type - %s", lineno(pos), t.Size, dtype)
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case 1:
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t.Go = c.int8
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case 2:
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@ -1131,13 +1139,13 @@ func (c *typeConv) Type(dtype dwarf.Type) *Type {
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gt := &ast.StarExpr{}
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t.Go = gt // publish before recursive call
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sub := c.Type(dt.Type)
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sub := c.Type(dt.Type, pos)
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gt.X = sub.Go
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t.C.Set("%s*", sub.C)
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case *dwarf.QualType:
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// Ignore qualifier.
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t = c.Type(dt.Type)
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t = c.Type(dt.Type, pos)
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c.m[dtype] = t
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return t
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@ -1161,7 +1169,7 @@ func (c *typeConv) Type(dtype dwarf.Type) *Type {
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t.C.Set("typeof(unsigned char[%d])", t.Size)
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}
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case "struct":
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g, csyntax, align := c.Struct(dt)
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g, csyntax, align := c.Struct(dt, pos)
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if t.C.Empty() {
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t.C.Set(csyntax)
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}
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@ -1191,7 +1199,7 @@ func (c *typeConv) Type(dtype dwarf.Type) *Type {
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name := c.Ident("_Ctype_" + dt.Name)
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goIdent[name.Name] = name
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t.Go = name // publish before recursive call
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sub := c.Type(dt.Type)
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sub := c.Type(dt.Type, pos)
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t.Size = sub.Size
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t.Align = sub.Align
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if _, ok := typedef[name.Name]; !ok {
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@ -1203,18 +1211,18 @@ func (c *typeConv) Type(dtype dwarf.Type) *Type {
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case *dwarf.UcharType:
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if t.Size != 1 {
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fatalf("unexpected: %d-byte uchar type - %s", t.Size, dtype)
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fatalf("%s: unexpected: %d-byte uchar type - %s", lineno(pos), t.Size, dtype)
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}
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t.Go = c.uint8
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t.Align = 1
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case *dwarf.UintType:
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if dt.BitSize > 0 {
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fatalf("unexpected: %d-bit uint type - %s", dt.BitSize, dtype)
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fatalf("%s: unexpected: %d-bit uint type - %s", lineno(pos), dt.BitSize, dtype)
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}
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switch t.Size {
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default:
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fatalf("unexpected: %d-byte uint type - %s", t.Size, dtype)
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fatalf("%s: unexpected: %d-byte uint type - %s", lineno(pos), t.Size, dtype)
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case 1:
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t.Go = c.uint8
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case 2:
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@ -1250,7 +1258,7 @@ func (c *typeConv) Type(dtype dwarf.Type) *Type {
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}
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if t.C.Empty() {
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fatalf("internal error: did not create C name for %s", dtype)
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fatalf("%s: internal error: did not create C name for %s", lineno(pos), dtype)
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}
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return t
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@ -1258,8 +1266,8 @@ func (c *typeConv) Type(dtype dwarf.Type) *Type {
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// FuncArg returns a Go type with the same memory layout as
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// dtype when used as the type of a C function argument.
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func (c *typeConv) FuncArg(dtype dwarf.Type) *Type {
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t := c.Type(dtype)
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func (c *typeConv) FuncArg(dtype dwarf.Type, pos token.Pos) *Type {
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t := c.Type(dtype, pos)
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switch dt := dtype.(type) {
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case *dwarf.ArrayType:
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// Arrays are passed implicitly as pointers in C.
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@ -1281,7 +1289,7 @@ func (c *typeConv) FuncArg(dtype dwarf.Type) *Type {
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// Unless the typedef happens to point to void* since
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// Go has special rules around using unsafe.Pointer.
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if _, void := base(ptr.Type).(*dwarf.VoidType); !void {
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return c.Type(ptr)
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return c.Type(ptr, pos)
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}
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}
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}
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@ -1290,7 +1298,7 @@ func (c *typeConv) FuncArg(dtype dwarf.Type) *Type {
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// FuncType returns the Go type analogous to dtype.
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// There is no guarantee about matching memory layout.
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func (c *typeConv) FuncType(dtype *dwarf.FuncType) *FuncType {
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func (c *typeConv) FuncType(dtype *dwarf.FuncType, pos token.Pos) *FuncType {
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p := make([]*Type, len(dtype.ParamType))
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gp := make([]*ast.Field, len(dtype.ParamType))
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for i, f := range dtype.ParamType {
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@ -1303,13 +1311,13 @@ func (c *typeConv) FuncType(dtype *dwarf.FuncType) *FuncType {
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p, gp = nil, nil
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break
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}
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p[i] = c.FuncArg(f)
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p[i] = c.FuncArg(f, pos)
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gp[i] = &ast.Field{Type: p[i].Go}
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}
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var r *Type
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var gr []*ast.Field
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if _, ok := dtype.ReturnType.(*dwarf.VoidType); !ok && dtype.ReturnType != nil {
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r = c.Type(dtype.ReturnType)
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r = c.Type(dtype.ReturnType, pos)
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gr = []*ast.Field{{Type: r.Go}}
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}
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return &FuncType{
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@ -1352,7 +1360,7 @@ func (c *typeConv) pad(fld []*ast.Field, size int64) []*ast.Field {
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}
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// Struct conversion: return Go and (6g) C syntax for type.
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func (c *typeConv) Struct(dt *dwarf.StructType) (expr *ast.StructType, csyntax string, align int64) {
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func (c *typeConv) Struct(dt *dwarf.StructType, pos token.Pos) (expr *ast.StructType, csyntax string, align int64) {
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var buf bytes.Buffer
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buf.WriteString("struct {")
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fld := make([]*ast.Field, 0, 2*len(dt.Field)+1) // enough for padding around every field
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@ -1394,7 +1402,7 @@ func (c *typeConv) Struct(dt *dwarf.StructType) (expr *ast.StructType, csyntax s
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fld = c.pad(fld, f.ByteOffset-off)
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off = f.ByteOffset
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}
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t := c.Type(f.Type)
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t := c.Type(f.Type, pos)
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tgo := t.Go
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size := t.Size
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@ -1435,7 +1443,7 @@ func (c *typeConv) Struct(dt *dwarf.StructType) (expr *ast.StructType, csyntax s
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off = dt.ByteSize
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}
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if off != dt.ByteSize {
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fatalf("struct size calculation error")
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fatalf("%s: struct size calculation error", lineno(pos))
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}
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buf.WriteString("}")
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csyntax = buf.String()
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@ -64,6 +64,10 @@ func run(stdin []byte, argv []string) (stdout, stderr []byte, ok bool) {
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return
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}
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func lineno(pos token.Pos) string {
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return fset.Position(pos).String()
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}
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// Die with an error message.
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func fatalf(msg string, args ...interface{}) {
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fmt.Fprintf(os.Stderr, msg+"\n", args...)
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16
test/fixedbugs/bug408.go
Normal file
16
test/fixedbugs/bug408.go
Normal file
@ -0,0 +1,16 @@
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// errchk cgo $D/$F.go
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// Copyright 2012 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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// Issue 1800: cgo not reporting line numbers.
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package main
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// #include <stdio.h>
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import "C"
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func f() {
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C.printf(nil) // ERROR "go:15.*unexpected type"
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}
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