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cmd/cgo: remove -fsanitize=hwaddress hardware tags

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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>
This commit is contained in:
Ian Lance Taylor 2022-06-10 16:49:51 -07:00 committed by Gopher Robot
parent 5ee939b819
commit fbc75dff2f
1 changed files with 29 additions and 8 deletions
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37
src/cmd/cgo/gcc.go
View file

@ -1831,6 +1831,23 @@ func (p *Package) gccDebug(stdin []byte, nnames int) (d *dwarf.Data, ints []int6
bo := f.ByteOrder
symtab, err := f.Symbols()
if err == nil {
// Check for use of -fsanitize=hwaddress (issue 53285).
removeTag := func(v uint64) uint64 { return v }
if goarch == "arm64" {
for i := range symtab {
if symtab[i].Name == "__hwasan_init" {
// -fsanitize=hwaddress on ARM
// uses the upper byte of a
// memory address as a hardware
// tag. Remove it so that
// we can find the associated
// data.
removeTag = func(v uint64) uint64 { return v &^ (0xff << (64 - 8)) }
break
}
}
}
for i := range symtab {
s := &symtab[i]
switch {
@ -1838,9 +1855,10 @@ func (p *Package) gccDebug(stdin []byte, nnames int) (d *dwarf.Data, ints []int6
// Found it. Now find data section.
if i := int(s.Section); 0 <= i && i < len(f.Sections) {
sect := f.Sections[i]
if sect.Addr <= s.Value && s.Value < sect.Addr+sect.Size {
val := removeTag(s.Value)
if sect.Addr <= val && val < sect.Addr+sect.Size {
if sdat, err := sect.Data(); err == nil {
data := sdat[s.Value-sect.Addr:]
data := sdat[val-sect.Addr:]
ints = make([]int64, len(data)/8)
for i := range ints {
ints[i] = int64(bo.Uint64(data[i*8:]))
@ -1852,9 +1870,10 @@ func (p *Package) gccDebug(stdin []byte, nnames int) (d *dwarf.Data, ints []int6
// Found it. Now find data section.
if i := int(s.Section); 0 <= i && i < len(f.Sections) {
sect := f.Sections[i]
if sect.Addr <= s.Value && s.Value < sect.Addr+sect.Size {
val := removeTag(s.Value)
if sect.Addr <= val && val < sect.Addr+sect.Size {
if sdat, err := sect.Data(); err == nil {
data := sdat[s.Value-sect.Addr:]
data := sdat[val-sect.Addr:]
floats = make([]float64, len(data)/8)
for i := range floats {
floats[i] = math.Float64frombits(bo.Uint64(data[i*8:]))
@ -1867,9 +1886,10 @@ func (p *Package) gccDebug(stdin []byte, nnames int) (d *dwarf.Data, ints []int6
// Found it. Now find data section.
if i := int(s.Section); 0 <= i && i < len(f.Sections) {
sect := f.Sections[i]
if sect.Addr <= s.Value && s.Value < sect.Addr+sect.Size {
val := removeTag(s.Value)
if sect.Addr <= val && val < sect.Addr+sect.Size {
if sdat, err := sect.Data(); err == nil {
data := sdat[s.Value-sect.Addr:]
data := sdat[val-sect.Addr:]
strdata[n] = string(data)
}
}
@ -1880,9 +1900,10 @@ func (p *Package) gccDebug(stdin []byte, nnames int) (d *dwarf.Data, ints []int6
// Found it. Now find data section.
if i := int(s.Section); 0 <= i && i < len(f.Sections) {
sect := f.Sections[i]
if sect.Addr <= s.Value && s.Value < sect.Addr+sect.Size {
val := removeTag(s.Value)
if sect.Addr <= val && val < sect.Addr+sect.Size {
if sdat, err := sect.Data(); err == nil {
data := sdat[s.Value-sect.Addr:]
data := sdat[val-sect.Addr:]
strlen := bo.Uint64(data[:8])
if strlen > (1<<(uint(p.IntSize*8)-1) - 1) { // greater than MaxInt?
fatalf("string literal too big")