Author: Remi Meier <remi.me...@inf.ethz.ch>
Branch: stmgc-c7
Changeset: r71370:cd438825f621
Date: 2014-05-07 14:06 +0200
http://bitbucket.org/pypy/pypy/changeset/cd438825f621/
Log: do a pseudo-allocation of WORD bytes when there is no other (checks
for safe-points)
diff --git a/rpython/jit/backend/llsupport/stmrewrite.py
b/rpython/jit/backend/llsupport/stmrewrite.py
--- a/rpython/jit/backend/llsupport/stmrewrite.py
+++ b/rpython/jit/backend/llsupport/stmrewrite.py
@@ -1,13 +1,11 @@
from rpython.jit.backend.llsupport.rewrite import GcRewriterAssembler
-from rpython.jit.backend.llsupport.descr import (
- CallDescr, FieldDescr, InteriorFieldDescr, ArrayDescr)
+from rpython.jit.backend.llsupport.descr import CallDescr, FieldDescr
from rpython.jit.metainterp.resoperation import ResOperation, rop
-from rpython.jit.metainterp.history import BoxPtr, ConstPtr, ConstInt
+from rpython.jit.metainterp.history import BoxPtr, ConstInt
from rpython.rlib.objectmodel import specialize
-from rpython.rlib.objectmodel import we_are_translated
from rpython.rlib.debug import (have_debug_prints, debug_start, debug_stop,
debug_print)
-from rpython.jit.codewriter.effectinfo import EffectInfo
+from rpython.jit.backend.llsupport.symbolic import WORD
class GcStmRewriterAssembler(GcRewriterAssembler):
@@ -121,8 +119,24 @@
self.read_barrier_applied[v_ptr] = None
def handle_should_break_transaction(self, op):
+ if not self.does_any_allocation:
+ # do a fake allocation since this is needed to check
+ # for requested safe-points:
+ self.does_any_allocation = True
+ self.emitting_an_operation_that_can_collect()
+
+ size = WORD
+ v_result = BoxPtr()
+ assert self._op_malloc_nursery is None # no ongoing allocation
+ malloc_op = ResOperation(rop.CALL_MALLOC_NURSERY,
+ [ConstInt(size)], v_result)
+ self._op_malloc_nursery = malloc_op
+ self.newops.append(malloc_op)
+ self._previous_size = size
+ self._v_last_malloced_nursery = v_result
+ self.write_barrier_applied[v_result] = None
+
self.newops.append(op)
- #self.does_any_allocation = True
def must_apply_write_barrier(self, val, v=None):
@@ -148,7 +162,6 @@
debug_print("fallback for", op.repr())
def maybe_handle_raw_accesses(self, op):
- from rpython.jit.backend.llsupport.descr import FieldDescr
descr = op.getdescr()
assert isinstance(descr, FieldDescr)
if descr.stm_dont_track_raw_accesses:
diff --git a/rpython/jit/backend/llsupport/test/test_stmrewrite.py
b/rpython/jit/backend/llsupport/test/test_stmrewrite.py
--- a/rpython/jit/backend/llsupport/test/test_stmrewrite.py
+++ b/rpython/jit/backend/llsupport/test/test_stmrewrite.py
@@ -1237,6 +1237,7 @@
jump(i1)
""", """
[]
+ p99 = call_malloc_nursery(8)
i1 = stm_should_break_transaction()
jump(i1)
""")
@@ -1263,6 +1264,7 @@
jump(i1, i2)
""", """
[]
+ p99 = call_malloc_nursery(8)
i1 = stm_should_break_transaction()
i2 = stm_should_break_transaction()
jump(i1, i2)
@@ -1280,6 +1282,7 @@
p2 = call_malloc_nursery(%(tdescr.size)d)
setfield_gc(p2, %(tdescr.tid)d, descr=tiddescr)
label()
+ p99 = call_malloc_nursery(8)
i1 = stm_should_break_transaction()
jump(i1)
""")
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