[pypy-commit] pypy use-mmap: Make position hinting work on 64-bit too. At least Linux64 doesn't
arigo
pypy.commits at gmail.com
Wed Jul 6 14:31:50 EDT 2016
Author: Armin Rigo <arigo at tunes.org>
Branch: use-mmap
Changeset: r85589:638e16f1b0f4
Date: 2016-07-06 20:33 +0200
http://bitbucket.org/pypy/pypy/changeset/638e16f1b0f4/
Log: Make position hinting work on 64-bit too. At least Linux64 doesn't
allow negative addresses to be used by processes, so the hint was
never respected. Now I hope it will be, which would avoid the
current situation: /proc/../maps shows alternating PROT_EXEC and
non-PROT_EXEC maps, which can't be merged by the kernel.
diff --git a/rpython/rlib/rmmap.py b/rpython/rlib/rmmap.py
--- a/rpython/rlib/rmmap.py
+++ b/rpython/rlib/rmmap.py
@@ -727,7 +727,10 @@
# XXX is this really necessary?
class Hint:
- pos = -0x4fff0000 # for reproducible results
+ if sys.maxint <= 2**32:
+ pos = -0x4fff0000 # for reproducible results
+ else:
+ pos = 0x4fde00000000
hint = Hint()
def alloc(map_size):
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