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cmd/cgo: remove -fsanitize=hwaddress hardware tags
No test because this isn't support on any of the builders. Fixes #53285 Change-Id: If8d17bdcdac81a6ce404a35a289bf83f07f02855 Reviewed-on: https://go-review.googlesource.com/c/go/+/411698 Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Run-TryBot: Ian Lance Taylor <iant@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
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@ -1831,6 +1831,23 @@ func (p *Package) gccDebug(stdin []byte, nnames int) (d *dwarf.Data, ints []int6
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bo := f.ByteOrder
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symtab, err := f.Symbols()
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if err == nil {
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// Check for use of -fsanitize=hwaddress (issue 53285).
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removeTag := func(v uint64) uint64 { return v }
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if goarch == "arm64" {
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for i := range symtab {
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if symtab[i].Name == "__hwasan_init" {
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// -fsanitize=hwaddress on ARM
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// uses the upper byte of a
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// memory address as a hardware
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// tag. Remove it so that
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// we can find the associated
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// data.
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removeTag = func(v uint64) uint64 { return v &^ (0xff << (64 - 8)) }
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break
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}
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}
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}
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for i := range symtab {
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s := &symtab[i]
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switch {
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@ -1838,9 +1855,10 @@ func (p *Package) gccDebug(stdin []byte, nnames int) (d *dwarf.Data, ints []int6
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// Found it. Now find data section.
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if i := int(s.Section); 0 <= i && i < len(f.Sections) {
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sect := f.Sections[i]
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if sect.Addr <= s.Value && s.Value < sect.Addr+sect.Size {
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val := removeTag(s.Value)
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if sect.Addr <= val && val < sect.Addr+sect.Size {
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if sdat, err := sect.Data(); err == nil {
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data := sdat[s.Value-sect.Addr:]
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data := sdat[val-sect.Addr:]
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ints = make([]int64, len(data)/8)
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for i := range ints {
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ints[i] = int64(bo.Uint64(data[i*8:]))
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@ -1852,9 +1870,10 @@ func (p *Package) gccDebug(stdin []byte, nnames int) (d *dwarf.Data, ints []int6
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// Found it. Now find data section.
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if i := int(s.Section); 0 <= i && i < len(f.Sections) {
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sect := f.Sections[i]
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if sect.Addr <= s.Value && s.Value < sect.Addr+sect.Size {
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val := removeTag(s.Value)
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if sect.Addr <= val && val < sect.Addr+sect.Size {
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if sdat, err := sect.Data(); err == nil {
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data := sdat[s.Value-sect.Addr:]
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data := sdat[val-sect.Addr:]
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floats = make([]float64, len(data)/8)
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for i := range floats {
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floats[i] = math.Float64frombits(bo.Uint64(data[i*8:]))
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@ -1867,9 +1886,10 @@ func (p *Package) gccDebug(stdin []byte, nnames int) (d *dwarf.Data, ints []int6
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// Found it. Now find data section.
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if i := int(s.Section); 0 <= i && i < len(f.Sections) {
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sect := f.Sections[i]
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if sect.Addr <= s.Value && s.Value < sect.Addr+sect.Size {
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val := removeTag(s.Value)
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if sect.Addr <= val && val < sect.Addr+sect.Size {
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if sdat, err := sect.Data(); err == nil {
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data := sdat[s.Value-sect.Addr:]
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data := sdat[val-sect.Addr:]
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strdata[n] = string(data)
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}
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}
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@ -1880,9 +1900,10 @@ func (p *Package) gccDebug(stdin []byte, nnames int) (d *dwarf.Data, ints []int6
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// Found it. Now find data section.
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if i := int(s.Section); 0 <= i && i < len(f.Sections) {
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sect := f.Sections[i]
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if sect.Addr <= s.Value && s.Value < sect.Addr+sect.Size {
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val := removeTag(s.Value)
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if sect.Addr <= val && val < sect.Addr+sect.Size {
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if sdat, err := sect.Data(); err == nil {
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data := sdat[s.Value-sect.Addr:]
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data := sdat[val-sect.Addr:]
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strlen := bo.Uint64(data[:8])
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if strlen > (1<<(uint(p.IntSize*8)-1) - 1) { // greater than MaxInt?
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fatalf("string literal too big")
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