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Revert "runtime: redo heap bitmap"

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This reverts commit b589208c8c.

Reason for revert: Bug somewhere in this code, causing wasm and maybe linux/386 to fail.

Change-Id: I5e1e501d839584e0219271bb937e94348f83c11f
Reviewed-on: https://go-review.googlesource.com/c/go/+/422395
Reviewed-by: Than McIntosh <thanm@google.com>
Run-TryBot: Keith Randall <khr@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
Keith Randall 2022-08-09 15:44:48 +00:00
parent e1a8e0e05d
commit ad0287f496
12 changed files with 1126 additions and 530 deletions
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2
src/runtime/slice.go
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@ -260,14 +260,12 @@ func growslice(et *_type, old slice, cap int) slice {
capmem = roundupsize(uintptr(newcap) << shift)
overflow = uintptr(newcap) > (maxAlloc >> shift)
newcap = int(capmem >> shift)
capmem = uintptr(newcap) << shift
default:
lenmem = uintptr(old.len) * et.size
newlenmem = uintptr(cap) * et.size
capmem, overflow = math.MulUintptr(et.size, uintptr(newcap))
capmem = roundupsize(capmem)
newcap = int(capmem / et.size)
capmem = uintptr(newcap) * et.size
}
// The check of overflow in addition to capmem > maxAlloc is needed