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[dev.debug] cmd/compile: rename dwarf.Var.Offset to StackOffset

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After we track decomposition, offset could mean stack offset or offset
in recomposed variable. Disambiguate.

Change-Id: I4d810b8c0dcac7a4ec25ac1e52898f55477025df
Reviewed-on: https://go-review.googlesource.com/50875
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
This commit is contained in:
Heschi Kreinick 2017-07-21 17:55:41 -04:00
parent ee392ac10c
commit 045f605ea1
3 changed files with 14 additions and 14 deletions
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8
src/cmd/compile/internal/gc/pgen.go
View File

@ -358,10 +358,10 @@ func debuginfo(fnsym *obj.LSym, curfn interface{}) []dwarf.Scope {
typename := dwarf.InfoPrefix + gotype.Name[len("type."):]
dwarfVars = append(dwarfVars, &dwarf.Var{
Name: n.Sym.Name,
Abbrev: abbrev,
Offset: int32(offs),
Type: Ctxt.Lookup(typename),
Name: n.Sym.Name,
Abbrev: abbrev,
StackOffset: int32(offs),
Type: Ctxt.Lookup(typename),
})
var scope ScopeID

2
src/cmd/compile/internal/gc/scope.go
View File

@ -168,7 +168,7 @@ func (v varsByScopeAndOffset) Less(i, j int) bool {
if v.scopes[i] != v.scopes[j] {
return v.scopes[i] < v.scopes[j]
}
return v.vars[i].Offset < v.vars[j].Offset
return v.vars[i].StackOffset < v.vars[j].StackOffset
}
func (v varsByScopeAndOffset) Swap(i, j int) {

18
src/cmd/internal/dwarf/dwarf.go
View File

@ -25,11 +25,11 @@ 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
Scope int32
Type Sym
Name string
Abbrev int // Either DW_ABRV_AUTO or DW_ABRV_PARAM
StackOffset int32
Scope int32
Type Sym
}
// A Scope represents a lexical scope. All variables declared within a
@ -749,9 +749,9 @@ func putvar(ctxt Context, s Sym, v *Var, encbuf []byte) {
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 {
if v.StackOffset != 0 {
loc = append(loc, DW_OP_consts)
loc = AppendSleb128(loc, int64(v.Offset))
loc = AppendSleb128(loc, int64(v.StackOffset))
loc = append(loc, DW_OP_plus)
}
putattr(ctxt, s, v.Abbrev, DW_FORM_block1, DW_CLS_BLOCK, int64(len(loc)), loc)
@ -759,9 +759,9 @@ func putvar(ctxt Context, s Sym, v *Var, encbuf []byte) {
}
// VarsByOffset attaches the methods of sort.Interface to []*Var,
// sorting in increasing Offset.
// sorting in increasing StackOffset.
type VarsByOffset []*Var
func (s VarsByOffset) Len() int { return len(s) }
func (s VarsByOffset) Less(i, j int) bool { return s[i].Offset < s[j].Offset }
func (s VarsByOffset) Less(i, j int) bool { return s[i].StackOffset < s[j].StackOffset }
func (s VarsByOffset) Swap(i, j int) { s[i], s[j] = s[j], s[i] }