Use mod vendor for vendored directory (backwards compatible)

1 files changed, 0 insertions, 600 deletions

diff --git a/vendor/github.com/google/gops/internal/dwarf/dwarf.go b/vendor/github.com/google/gops/internal/dwarf/dwarf.go
deleted file mode 100644
index c72ef5b0..00000000
--- a/vendor/github.com/google/gops/internal/dwarf/dwarf.go
+++ /dev/null
@@ -1,600 +0,0 @@
-// Copyright 2016 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 dwarf generates DWARF debugging information.
-// DWARF generation is split between the compiler and the linker,
-// this package contains the shared code.
-package dwarf
-
-import (
-	"fmt"
-)
-
-// InfoPrefix is the prefix for all the symbols containing DWARF info entries.
-const InfoPrefix = "go.info."
-
-// Sym represents a symbol.
-type Sym interface {
-}
-
-// A Var represents a local variable or a function parameter.
-type Var struct {
-	Name   string
-	Abbrev int // Either DW_ABRV_AUTO or DW_ABRV_PARAM
-	Offset int32
-	Type   Sym
-	Link   *Var
-}
-
-// A Context specifies how to add data to a Sym.
-type Context interface {
-	PtrSize() int
-	AddInt(s Sym, size int, i int64)
-	AddBytes(s Sym, b []byte)
-	AddAddress(s Sym, t interface{}, ofs int64)
-	AddSectionOffset(s Sym, size int, t interface{}, ofs int64)
-	AddString(s Sym, v string)
-	SymValue(s Sym) int64
-}
-
-// AppendUleb128 appends v to b using DWARF's unsigned LEB128 encoding.
-func AppendUleb128(b []byte, v uint64) []byte {
-	for {
-		c := uint8(v & 0x7f)
-		v >>= 7
-		if v != 0 {
-			c |= 0x80
-		}
-		b = append(b, c)
-		if c&0x80 == 0 {
-			break
-		}
-	}
-	return b
-}
-
-// AppendSleb128 appends v to b using DWARF's signed LEB128 encoding.
-func AppendSleb128(b []byte, v int64) []byte {
-	for {
-		c := uint8(v & 0x7f)
-		s := uint8(v & 0x40)
-		v >>= 7
-		if (v != -1 || s == 0) && (v != 0 || s != 0) {
-			c |= 0x80
-		}
-		b = append(b, c)
-		if c&0x80 == 0 {
-			break
-		}
-	}
-	return b
-}
-
-var encbuf [20]byte
-
-// AppendUleb128 appends v to s using DWARF's unsigned LEB128 encoding.
-func Uleb128put(ctxt Context, s Sym, v int64) {
-	b := AppendUleb128(encbuf[:0], uint64(v))
-	ctxt.AddBytes(s, b)
-}
-
-// AppendUleb128 appends v to s using DWARF's signed LEB128 encoding.
-func Sleb128put(ctxt Context, s Sym, v int64) {
-	b := AppendSleb128(encbuf[:0], v)
-	ctxt.AddBytes(s, b)
-}
-
-/*
- * Defining Abbrevs.  This is hardcoded, and there will be
- * only a handful of them.  The DWARF spec places no restriction on
- * the ordering of attributes in the Abbrevs and DIEs, and we will
- * always write them out in the order of declaration in the abbrev.
- */
-type dwAttrForm struct {
-	attr uint16
-	form uint8
-}
-
-// Go-specific type attributes.
-const (
-	DW_AT_go_kind = 0x2900
-	DW_AT_go_key  = 0x2901
-	DW_AT_go_elem = 0x2902
-
-	DW_AT_internal_location = 253 // params and locals; not emitted
-)
-
-// Index into the abbrevs table below.
-// Keep in sync with ispubname() and ispubtype() below.
-// ispubtype considers >= NULLTYPE public
-const (
-	DW_ABRV_NULL = iota
-	DW_ABRV_COMPUNIT
-	DW_ABRV_FUNCTION
-	DW_ABRV_VARIABLE
-	DW_ABRV_AUTO
-	DW_ABRV_PARAM
-	DW_ABRV_STRUCTFIELD
-	DW_ABRV_FUNCTYPEPARAM
-	DW_ABRV_DOTDOTDOT
-	DW_ABRV_ARRAYRANGE
-	DW_ABRV_NULLTYPE
-	DW_ABRV_BASETYPE
-	DW_ABRV_ARRAYTYPE
-	DW_ABRV_CHANTYPE
-	DW_ABRV_FUNCTYPE
-	DW_ABRV_IFACETYPE
-	DW_ABRV_MAPTYPE
-	DW_ABRV_PTRTYPE
-	DW_ABRV_BARE_PTRTYPE // only for void*, no DW_AT_type attr to please gdb 6.
-	DW_ABRV_SLICETYPE
-	DW_ABRV_STRINGTYPE
-	DW_ABRV_STRUCTTYPE
-	DW_ABRV_TYPEDECL
-	DW_NABRV
-)
-
-type dwAbbrev struct {
-	tag      uint8
-	children uint8
-	attr     []dwAttrForm
-}
-
-var abbrevs = [DW_NABRV]dwAbbrev{
-	/* The mandatory DW_ABRV_NULL entry. */
-	{0, 0, []dwAttrForm{}},
-
-	/* COMPUNIT */
-	{
-		DW_TAG_compile_unit,
-		DW_CHILDREN_yes,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			{DW_AT_language, DW_FORM_data1},
-			{DW_AT_low_pc, DW_FORM_addr},
-			{DW_AT_high_pc, DW_FORM_addr},
-			{DW_AT_stmt_list, DW_FORM_data4},
-			{DW_AT_comp_dir, DW_FORM_string},
-		},
-	},
-
-	/* FUNCTION */
-	{
-		DW_TAG_subprogram,
-		DW_CHILDREN_yes,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			{DW_AT_low_pc, DW_FORM_addr},
-			{DW_AT_high_pc, DW_FORM_addr},
-			{DW_AT_external, DW_FORM_flag},
-		},
-	},
-
-	/* VARIABLE */
-	{
-		DW_TAG_variable,
-		DW_CHILDREN_no,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			{DW_AT_location, DW_FORM_block1},
-			{DW_AT_type, DW_FORM_ref_addr},
-			{DW_AT_external, DW_FORM_flag},
-		},
-	},
-
-	/* AUTO */
-	{
-		DW_TAG_variable,
-		DW_CHILDREN_no,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			{DW_AT_location, DW_FORM_block1},
-			{DW_AT_type, DW_FORM_ref_addr},
-		},
-	},
-
-	/* PARAM */
-	{
-		DW_TAG_formal_parameter,
-		DW_CHILDREN_no,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			{DW_AT_location, DW_FORM_block1},
-			{DW_AT_type, DW_FORM_ref_addr},
-		},
-	},
-
-	/* STRUCTFIELD */
-	{
-		DW_TAG_member,
-		DW_CHILDREN_no,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			{DW_AT_data_member_location, DW_FORM_block1},
-			{DW_AT_type, DW_FORM_ref_addr},
-		},
-	},
-
-	/* FUNCTYPEPARAM */
-	{
-		DW_TAG_formal_parameter,
-		DW_CHILDREN_no,
-
-		// No name!
-		[]dwAttrForm{
-			{DW_AT_type, DW_FORM_ref_addr},
-		},
-	},
-
-	/* DOTDOTDOT */
-	{
-		DW_TAG_unspecified_parameters,
-		DW_CHILDREN_no,
-		[]dwAttrForm{},
-	},
-
-	/* ARRAYRANGE */
-	{
-		DW_TAG_subrange_type,
-		DW_CHILDREN_no,
-
-		// No name!
-		[]dwAttrForm{
-			{DW_AT_type, DW_FORM_ref_addr},
-			{DW_AT_count, DW_FORM_udata},
-		},
-	},
-
-	// Below here are the types considered public by ispubtype
-	/* NULLTYPE */
-	{
-		DW_TAG_unspecified_type,
-		DW_CHILDREN_no,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-		},
-	},
-
-	/* BASETYPE */
-	{
-		DW_TAG_base_type,
-		DW_CHILDREN_no,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			{DW_AT_encoding, DW_FORM_data1},
-			{DW_AT_byte_size, DW_FORM_data1},
-			{DW_AT_go_kind, DW_FORM_data1},
-		},
-	},
-
-	/* ARRAYTYPE */
-	// child is subrange with upper bound
-	{
-		DW_TAG_array_type,
-		DW_CHILDREN_yes,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			{DW_AT_type, DW_FORM_ref_addr},
-			{DW_AT_byte_size, DW_FORM_udata},
-			{DW_AT_go_kind, DW_FORM_data1},
-		},
-	},
-
-	/* CHANTYPE */
-	{
-		DW_TAG_typedef,
-		DW_CHILDREN_no,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			{DW_AT_type, DW_FORM_ref_addr},
-			{DW_AT_go_kind, DW_FORM_data1},
-			{DW_AT_go_elem, DW_FORM_ref_addr},
-		},
-	},
-
-	/* FUNCTYPE */
-	{
-		DW_TAG_subroutine_type,
-		DW_CHILDREN_yes,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			// {DW_AT_type,	DW_FORM_ref_addr},
-			{DW_AT_go_kind, DW_FORM_data1},
-		},
-	},
-
-	/* IFACETYPE */
-	{
-		DW_TAG_typedef,
-		DW_CHILDREN_yes,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			{DW_AT_type, DW_FORM_ref_addr},
-			{DW_AT_go_kind, DW_FORM_data1},
-		},
-	},
-
-	/* MAPTYPE */
-	{
-		DW_TAG_typedef,
-		DW_CHILDREN_no,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			{DW_AT_type, DW_FORM_ref_addr},
-			{DW_AT_go_kind, DW_FORM_data1},
-			{DW_AT_go_key, DW_FORM_ref_addr},
-			{DW_AT_go_elem, DW_FORM_ref_addr},
-		},
-	},
-
-	/* PTRTYPE */
-	{
-		DW_TAG_pointer_type,
-		DW_CHILDREN_no,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			{DW_AT_type, DW_FORM_ref_addr},
-			{DW_AT_go_kind, DW_FORM_data1},
-		},
-	},
-
-	/* BARE_PTRTYPE */
-	{
-		DW_TAG_pointer_type,
-		DW_CHILDREN_no,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-		},
-	},
-
-	/* SLICETYPE */
-	{
-		DW_TAG_structure_type,
-		DW_CHILDREN_yes,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			{DW_AT_byte_size, DW_FORM_udata},
-			{DW_AT_go_kind, DW_FORM_data1},
-			{DW_AT_go_elem, DW_FORM_ref_addr},
-		},
-	},
-
-	/* STRINGTYPE */
-	{
-		DW_TAG_structure_type,
-		DW_CHILDREN_yes,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			{DW_AT_byte_size, DW_FORM_udata},
-			{DW_AT_go_kind, DW_FORM_data1},
-		},
-	},
-
-	/* STRUCTTYPE */
-	{
-		DW_TAG_structure_type,
-		DW_CHILDREN_yes,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			{DW_AT_byte_size, DW_FORM_udata},
-			{DW_AT_go_kind, DW_FORM_data1},
-		},
-	},
-
-	/* TYPEDECL */
-	{
-		DW_TAG_typedef,
-		DW_CHILDREN_no,
-		[]dwAttrForm{
-			{DW_AT_name, DW_FORM_string},
-			{DW_AT_type, DW_FORM_ref_addr},
-		},
-	},
-}
-
-// GetAbbrev returns the contents of the .debug_abbrev section.
-func GetAbbrev() []byte {
-	var buf []byte
-	for i := 1; i < DW_NABRV; i++ {
-		// See section 7.5.3
-		buf = AppendUleb128(buf, uint64(i))
-
-		buf = AppendUleb128(buf, uint64(abbrevs[i].tag))
-		buf = append(buf, byte(abbrevs[i].children))
-		for _, f := range abbrevs[i].attr {
-			buf = AppendUleb128(buf, uint64(f.attr))
-			buf = AppendUleb128(buf, uint64(f.form))
-		}
-		buf = append(buf, 0, 0)
-	}
-	return append(buf, 0)
-}
-
-/*
- * Debugging Information Entries and their attributes.
- */
-
-// DWAttr represents an attribute of a DWDie.
-//
-// For DW_CLS_string and _block, value should contain the length, and
-// data the data, for _reference, value is 0 and data is a DWDie* to
-// the referenced instance, for all others, value is the whole thing
-// and data is null.
-type DWAttr struct {
-	Link  *DWAttr
-	Atr   uint16 // DW_AT_
-	Cls   uint8  // DW_CLS_
-	Value int64
-	Data  interface{}
-}
-
-// DWDie represents a DWARF debug info entry.
-type DWDie struct {
-	Abbrev int
-	Link   *DWDie
-	Child  *DWDie
-	Attr   *DWAttr
-	Sym    Sym
-}
-
-func putattr(ctxt Context, s Sym, abbrev int, form int, cls int, value int64, data interface{}) error {
-	switch form {
-	case DW_FORM_addr: // address
-		ctxt.AddAddress(s, data, value)
-
-	case DW_FORM_block1: // block
-		if cls == DW_CLS_ADDRESS {
-			ctxt.AddInt(s, 1, int64(1+ctxt.PtrSize()))
-			ctxt.AddInt(s, 1, DW_OP_addr)
-			ctxt.AddAddress(s, data, 0)
-			break
-		}
-
-		value &= 0xff
-		ctxt.AddInt(s, 1, value)
-		p := data.([]byte)[:value]
-		ctxt.AddBytes(s, p)
-
-	case DW_FORM_block2: // block
-		value &= 0xffff
-
-		ctxt.AddInt(s, 2, value)
-		p := data.([]byte)[:value]
-		ctxt.AddBytes(s, p)
-
-	case DW_FORM_block4: // block
-		value &= 0xffffffff
-
-		ctxt.AddInt(s, 4, value)
-		p := data.([]byte)[:value]
-		ctxt.AddBytes(s, p)
-
-	case DW_FORM_block: // block
-		Uleb128put(ctxt, s, value)
-
-		p := data.([]byte)[:value]
-		ctxt.AddBytes(s, p)
-
-	case DW_FORM_data1: // constant
-		ctxt.AddInt(s, 1, value)
-
-	case DW_FORM_data2: // constant
-		ctxt.AddInt(s, 2, value)
-
-	case DW_FORM_data4: // constant, {line,loclist,mac,rangelist}ptr
-		if cls == DW_CLS_PTR { // DW_AT_stmt_list
-			ctxt.AddSectionOffset(s, 4, data, 0)
-			break
-		}
-		ctxt.AddInt(s, 4, value)
-
-	case DW_FORM_data8: // constant, {line,loclist,mac,rangelist}ptr
-		ctxt.AddInt(s, 8, value)
-
-	case DW_FORM_sdata: // constant
-		Sleb128put(ctxt, s, value)
-
-	case DW_FORM_udata: // constant
-		Uleb128put(ctxt, s, value)
-
-	case DW_FORM_string: // string
-		str := data.(string)
-		ctxt.AddString(s, str)
-		// TODO(ribrdb): verify padded strings are never used and remove this
-		for i := int64(len(str)); i < value; i++ {
-			ctxt.AddInt(s, 1, 0)
-		}
-
-	case DW_FORM_flag: // flag
-		if value != 0 {
-			ctxt.AddInt(s, 1, 1)
-		} else {
-			ctxt.AddInt(s, 1, 0)
-		}
-
-	// In DWARF 2 (which is what we claim to generate),
-	// the ref_addr is the same size as a normal address.
-	// In DWARF 3 it is always 32 bits, unless emitting a large
-	// (> 4 GB of debug info aka "64-bit") unit, which we don't implement.
-	case DW_FORM_ref_addr: // reference to a DIE in the .info section
-		if data == nil {
-			return fmt.Errorf("dwarf: null reference in %d", abbrev)
-		} else {
-			ctxt.AddSectionOffset(s, ctxt.PtrSize(), data, 0)
-		}
-
-	case DW_FORM_ref1, // reference within the compilation unit
-		DW_FORM_ref2,      // reference
-		DW_FORM_ref4,      // reference
-		DW_FORM_ref8,      // reference
-		DW_FORM_ref_udata, // reference
-
-		DW_FORM_strp,     // string
-		DW_FORM_indirect: // (see Section 7.5.3)
-		fallthrough
-	default:
-		return fmt.Errorf("dwarf: unsupported attribute form %d / class %d", form, cls)
-	}
-	return nil
-}
-
-// PutAttrs writes the attributes for a DIE to symbol 's'.
-//
-// Note that we can (and do) add arbitrary attributes to a DIE, but
-// only the ones actually listed in the Abbrev will be written out.
-func PutAttrs(ctxt Context, s Sym, abbrev int, attr *DWAttr) {
-Outer:
-	for _, f := range abbrevs[abbrev].attr {
-		for ap := attr; ap != nil; ap = ap.Link {
-			if ap.Atr == f.attr {
-				putattr(ctxt, s, abbrev, int(f.form), int(ap.Cls), ap.Value, ap.Data)
-				continue Outer
-			}
-		}
-
-		putattr(ctxt, s, abbrev, int(f.form), 0, 0, nil)
-	}
-}
-
-// HasChildren returns true if 'die' uses an abbrev that supports children.
-func HasChildren(die *DWDie) bool {
-	return abbrevs[die.Abbrev].children != 0
-}
-
-// PutFunc writes a DIE for a function to s.
-// It also writes child DIEs for each variable in vars.
-func PutFunc(ctxt Context, s Sym, name string, external bool, startPC Sym, size int64, vars *Var) {
-	Uleb128put(ctxt, s, DW_ABRV_FUNCTION)
-	putattr(ctxt, s, DW_ABRV_FUNCTION, DW_FORM_string, DW_CLS_STRING, int64(len(name)), name)
-	putattr(ctxt, s, DW_ABRV_FUNCTION, DW_FORM_addr, DW_CLS_ADDRESS, 0, startPC)
-	putattr(ctxt, s, DW_ABRV_FUNCTION, DW_FORM_addr, DW_CLS_ADDRESS, size+ctxt.SymValue(startPC), startPC)
-	var ev int64
-	if external {
-		ev = 1
-	}
-	putattr(ctxt, s, DW_ABRV_FUNCTION, DW_FORM_flag, DW_CLS_FLAG, ev, 0)
-	names := make(map[string]bool)
-	for v := vars; v != nil; v = v.Link {
-		var n string
-		if names[v.Name] {
-			n = fmt.Sprintf("%s#%d", v.Name, len(names))
-		} else {
-			n = v.Name
-		}
-		names[n] = true
-
-		Uleb128put(ctxt, s, int64(v.Abbrev))
-		putattr(ctxt, s, v.Abbrev, DW_FORM_string, DW_CLS_STRING, int64(len(n)), n)
-		loc := append(encbuf[:0], DW_OP_call_frame_cfa)
-		if v.Offset != 0 {
-			loc = append(loc, DW_OP_consts)
-			loc = AppendSleb128(loc, int64(v.Offset))
-			loc = append(loc, DW_OP_plus)
-		}
-		putattr(ctxt, s, v.Abbrev, DW_FORM_block1, DW_CLS_BLOCK, int64(len(loc)), loc)
-		putattr(ctxt, s, v.Abbrev, DW_FORM_ref_addr, DW_CLS_REFERENCE, 0, v.Type)
-
-	}
-	Uleb128put(ctxt, s, 0)
-}