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[dev.typeparams] runtime: crash the GC at clobberdead pointer on ARM64

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Extend CL 310330 to ARM64, which now has clobberdead mode
implemented in the compiler.

Change-Id: I07f6951d81a0797ef7a74e48b79db5cea2bf876b
Reviewed-on: https://go-review.googlesource.com/c/go/+/324766
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
This commit is contained in:
Cherry Mui 2021-06-03 12:26:18 -04:00
parent 6b1e4430bb
commit 55b4310acd
1 changed files with 4 additions and 4 deletions
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8
src/runtime/mbitmap.go
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@ -386,10 +386,10 @@ func findObject(p, refBase, refOff uintptr) (base uintptr, s *mspan, objIndex ui
// If s is nil, the virtual address has never been part of the heap.
// This pointer may be to some mmap'd region, so we allow it.
if s == nil {
if GOARCH == "amd64" && p == clobberdeadPtr && debug.invalidptr != 0 {
// Crash if clobberdeadPtr is seen. Only on AMD64 for now, as
// it is the only platform where compiler's clobberdead mode is
// implemented. On AMD64 clobberdeadPtr cannot be a valid address.
if (GOARCH == "amd64" || GOARCH == "arm64") && p == clobberdeadPtr && debug.invalidptr != 0 {
// Crash if clobberdeadPtr is seen. Only on AMD64 and ARM64 for now,
// as they are the only platform where compiler's clobberdead mode is
// implemented. On these platforms clobberdeadPtr cannot be a valid address.
badPointer(s, p, refBase, refOff)
}
return