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cmd/asm: improve assembler error messages
Provide file/line numbers for errors when we have them. Make the assembler error text closer to the equivalent errors from the compiler. Abort further processing when we come across errors. Fixes #53994 Change-Id: I4d6a037d6d713c1329923fce4c1189b5609f3660 Reviewed-on: https://go-review.googlesource.com/c/go/+/455276 Reviewed-by: Keith Randall <khr@google.com> Run-TryBot: Keith Randall <khr@google.com> Auto-Submit: Keith Randall <khr@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
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@ -297,7 +297,7 @@ func (p *Parser) asmGlobl(operands [][]lex.Token) {
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}
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// log.Printf("GLOBL %s %d, $%d", name, flag, size)
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p.ctxt.Globl(nameAddr.Sym, addr.Offset, int(flag))
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p.ctxt.GloblPos(nameAddr.Sym, addr.Offset, int(flag), p.pos())
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}
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// asmPCData assembles a PCDATA pseudo-op.
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@ -381,6 +381,10 @@ func TestGoBuildErrors(t *testing.T) {
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testErrors(t, "amd64", "buildtagerror")
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}
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func TestGenericErrors(t *testing.T) {
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testErrors(t, "amd64", "duperror")
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}
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func TestARMErrors(t *testing.T) {
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testErrors(t, "arm", "armerror")
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}
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14
src/cmd/asm/internal/asm/testdata/duperror.s
vendored
Normal file
14
src/cmd/asm/internal/asm/testdata/duperror.s
vendored
Normal file
@ -0,0 +1,14 @@
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// Copyright 2022 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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TEXT foo(SB), 0, $0
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RET
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TEXT foo(SB), 0, $0 // ERROR "symbol foo redeclared"
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RET
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GLOBL bar(SB), 0, $8
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GLOBL bar(SB), 0, $8 // ERROR "symbol bar redeclared"
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DATA bar+0(SB)/8, $0
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DATA bar+0(SB)/8, $0 // ERROR "overlapping DATA entry for bar"
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@ -58,12 +58,12 @@ func Flushplist(ctxt *Link, plist *Plist, newprog ProgAlloc, myimportpath string
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switch p.To.Sym.Name {
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case "go_args_stackmap":
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if p.From.Type != TYPE_CONST || p.From.Offset != objabi.FUNCDATA_ArgsPointerMaps {
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ctxt.Diag("FUNCDATA use of go_args_stackmap(SB) without FUNCDATA_ArgsPointerMaps")
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ctxt.Diag("%s: FUNCDATA use of go_args_stackmap(SB) without FUNCDATA_ArgsPointerMaps", p.Pos)
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}
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p.To.Sym = ctxt.LookupDerived(curtext, curtext.Name+".args_stackmap")
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case "no_pointers_stackmap":
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if p.From.Type != TYPE_CONST || p.From.Offset != objabi.FUNCDATA_LocalsPointerMaps {
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ctxt.Diag("FUNCDATA use of no_pointers_stackmap(SB) without FUNCDATA_LocalsPointerMaps")
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ctxt.Diag("%s: FUNCDATA use of no_pointers_stackmap(SB) without FUNCDATA_LocalsPointerMaps", p.Pos)
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}
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// funcdata for functions with no local variables in frame.
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// Define two zero-length bitmaps, because the same index is used
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@ -166,11 +166,13 @@ func (ctxt *Link) InitTextSym(s *LSym, flag int, start src.XPos) {
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return
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}
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if s.Func() != nil {
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ctxt.Diag("InitTextSym double init for %s", s.Name)
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ctxt.Diag("%s: symbol %s redeclared\n\t%s: other declaration of symbol %s", ctxt.PosTable.Pos(start), s.Name, ctxt.PosTable.Pos(s.Func().Text.Pos), s.Name)
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return
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}
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s.NewFuncInfo()
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if s.OnList() {
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ctxt.Diag("symbol %s listed multiple times", s.Name)
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ctxt.Diag("%s: symbol %s redeclared", ctxt.PosTable.Pos(start), s.Name)
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return
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}
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// startLine should be the same line number that would be displayed via
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@ -210,8 +212,12 @@ func (ctxt *Link) toFuncFlag(flag int) objabi.FuncFlag {
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}
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func (ctxt *Link) Globl(s *LSym, size int64, flag int) {
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ctxt.GloblPos(s, size, flag, src.NoXPos)
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}
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func (ctxt *Link) GloblPos(s *LSym, size int64, flag int, pos src.XPos) {
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if s.OnList() {
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ctxt.Diag("symbol %s listed multiple times", s.Name)
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// TODO: print where the first declaration was.
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ctxt.Diag("%s: symbol %s redeclared", ctxt.PosTable.Pos(pos), s.Name)
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}
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s.Set(AttrOnList, true)
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ctxt.Data = append(ctxt.Data, s)
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