Half of tests currently crash with GODEBUG=wbshadow.
_PageSize is set to 8192. So data can be extended outside
of actually mapped region during rounding. Which leads to crash
during initial copying to shadow.
Use _PhysPageSize instead.
Change-Id: Iaa89992bd57f86dafa16b092b53fdc0606213acb
Reviewed-on: https://go-review.googlesource.com/3286
Reviewed-by: Russ Cox <rsc@golang.org>
The code in mfinal.go is moved from malloc*.go and mgc*.go
and substantially unchanged.
The code in mbitmap.go is also moved from those files, but
cleaned up so that it can be called from those files (in most cases
the code being moved was not already a standalone function).
I also renamed the constants and wrote comments describing
the format. The result is a significant cleanup and isolation of
the bitmap code, but, roughly speaking, it should be treated
and reviewed as new code.
The other files changed only as much as necessary to support
this code movement.
This CL does NOT change the semantics of the heap or type
bitmaps at all, although there are now some obvious opportunities
to do so in followup CLs.
Change-Id: I41b8d5de87ad1d3cd322709931ab25e659dbb21d
Reviewed-on: https://go-review.googlesource.com/2991
Reviewed-by: Keith Randall <khr@golang.org>
I also added new comments at the top of mbarrier.go,
but the rest of the code is just copy-and-paste.
Change-Id: Iaeb2b12f8b1eaa33dbff5c2de676ca902bfddf2e
Reviewed-on: https://go-review.googlesource.com/2990
Reviewed-by: Austin Clements <austin@google.com>
