1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
|
from rpython.rtyper.lltypesystem import rffi
from rpython.rtyper.lltypesystem import lltype
from rpython.jit.backend.llsupport import jitframe
from rpython.rlib.rarithmetic import r_uint
from rpython.jit.backend.llsupport.symbolic import WORD
def allocate_gcmap(assembler, frame_depth, fixed_size):
size = frame_depth + fixed_size
malloc_size = (size // WORD // 8 + 1) + 1
rawgcmap = assembler.datablockwrapper.malloc_aligned(WORD * malloc_size,
WORD)
# set the length field
rffi.cast(rffi.CArrayPtr(lltype.Signed), rawgcmap)[0] = malloc_size - 1
gcmap = rffi.cast(lltype.Ptr(jitframe.GCMAP), rawgcmap)
# zero the area
for i in range(malloc_size - 1):
gcmap[i] = r_uint(0)
return gcmap
|
