Author: Armin Rigo <[email protected]>
Branch:
Changeset: r85691:06f4abd385c4
Date: 2016-07-14 14:02 +0200
http://bitbucket.org/pypy/pypy/changeset/06f4abd385c4/
Log: Windows support for use-madv-free
diff --git a/rpython/rlib/rmmap.py b/rpython/rlib/rmmap.py
--- a/rpython/rlib/rmmap.py
+++ b/rpython/rlib/rmmap.py
@@ -82,7 +82,8 @@
constant_names = ['PAGE_READONLY', 'PAGE_READWRITE', 'PAGE_WRITECOPY',
'FILE_MAP_READ', 'FILE_MAP_WRITE', 'FILE_MAP_COPY',
'DUPLICATE_SAME_ACCESS', 'MEM_COMMIT', 'MEM_RESERVE',
- 'MEM_RELEASE', 'PAGE_EXECUTE_READWRITE', 'PAGE_NOACCESS']
+ 'MEM_RELEASE', 'PAGE_EXECUTE_READWRITE', 'PAGE_NOACCESS',
+ 'MEM_RESET']
for name in constant_names:
setattr(CConfig, name, rffi_platform.ConstantInteger(name))
@@ -232,6 +233,9 @@
VirtualAlloc, VirtualAlloc_safe = winexternal('VirtualAlloc',
[rffi.VOIDP, rffi.SIZE_T, DWORD, DWORD],
rffi.VOIDP)
+ _, _VirtualAlloc_safe_no_wrapper = winexternal('VirtualAlloc',
+ [rffi.VOIDP, rffi.SIZE_T, DWORD, DWORD],
+ rffi.VOIDP, _nowrapper=True)
_, _VirtualProtect_safe = winexternal('VirtualProtect',
[rffi.VOIDP, rffi.SIZE_T, DWORD, LPDWORD],
BOOL)
@@ -949,3 +953,12 @@
def free(ptr, map_size):
VirtualFree_safe(ptr, 0, MEM_RELEASE)
+
+ def madvise_free(addr, map_size):
+ r = _VirtualAlloc_safe_no_wrapper(
+ rffi.cast(rffi.VOIDP, addr),
+ rffi.cast(rffi.SIZE_T, map_size),
+ rffi.cast(DWORD, MEM_RESET),
+ rffi.cast(DWORD, PAGE_READWRITE))
+ from rpython.rlib import debug
+ debug.debug_print("madvise_free:", r)
diff --git a/rpython/rlib/test/test_rmmap.py b/rpython/rlib/test/test_rmmap.py
--- a/rpython/rlib/test/test_rmmap.py
+++ b/rpython/rlib/test/test_rmmap.py
@@ -5,11 +5,7 @@
from rpython.rlib.rarithmetic import intmask
from rpython.rlib import rmmap as mmap
from rpython.rlib.rmmap import RTypeError, RValueError, alloc, free
-try:
- from rpython.rlib.rmmap import madvise_free
-except ImportError:
- def madvise_free(addr, size):
- "Not available"
+from rpython.rlib.rmmap import madvise_free
class TestMMap:
diff --git a/rpython/rtyper/lltypesystem/llarena.py
b/rpython/rtyper/lltypesystem/llarena.py
--- a/rpython/rtyper/lltypesystem/llarena.py
+++ b/rpython/rtyper/lltypesystem/llarena.py
@@ -440,17 +440,6 @@
if size > 0: # clear the final misaligned part, if any
llmemory.raw_memclear(baseaddr, size)
- def madvise_arena_free(baseaddr, size):
- from rpython.rlib import rmmap
-
- pagesize = posixpagesize.get()
- baseaddr = rffi.cast(lltype.Signed, baseaddr)
- aligned_addr = (baseaddr + pagesize - 1) & ~(pagesize - 1)
- size -= (aligned_addr - baseaddr)
- if size >= pagesize:
- rmmap.madvise_free(rffi.cast(rmmap.PTR, aligned_addr),
- size & ~(pagesize - 1))
-
else:
# XXX any better implementation on Windows?
# Should use VirtualAlloc() to reserve the range of pages,
@@ -459,10 +448,22 @@
# them immediately.
clear_large_memory_chunk = llmemory.raw_memclear
- def madvise_arena_free(baseaddr, size):
- """XXX find a Windows equivalent?
- 'baseaddr' is in the middle of memory obtained with the C malloc()...
- """
+ class PosixPageSize:
+ def get(self):
+ from rpython.rlib import rmmap
+ return rmmap.PAGESIZE
+ posixpagesize = PosixPageSize()
+
+def madvise_arena_free(baseaddr, size):
+ from rpython.rlib import rmmap
+
+ pagesize = posixpagesize.get()
+ baseaddr = rffi.cast(lltype.Signed, baseaddr)
+ aligned_addr = (baseaddr + pagesize - 1) & ~(pagesize - 1)
+ size -= (aligned_addr - baseaddr)
+ if size >= pagesize:
+ rmmap.madvise_free(rffi.cast(rmmap.PTR, aligned_addr),
+ size & ~(pagesize - 1))
if os.name == "posix":
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