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import sys
from pypy.objspace.flow.model import Constant
from pypy.translator.c.support import cdecl
from pypy.translator.c.node import ContainerNode
from pypy.rpython.lltypesystem.lltype import \
typeOf, Ptr, ContainerType, RttiStruct, \
RuntimeTypeInfo, getRuntimeTypeInfo, top_container
from pypy.rpython.memory.gctransform import \
refcounting, boehm, framework, asmgcroot
from pypy.rpython.lltypesystem import lltype, llmemory
from pypy.translator.tool.cbuild import ExternalCompilationInfo
class BasicGcPolicy(object):
requires_stackless = False
stores_hash_at_the_end = False
def __init__(self, db, thread_enabled=False):
self.db = db
self.thread_enabled = thread_enabled
def common_gcheader_definition(self, defnode):
if defnode.db.gctransformer is not None:
return defnode.db.gctransformer.HDR
return None
def common_gcheader_initdata(self, defnode):
if defnode.db.gctransformer is not None:
raise NotImplementedError
return None
def struct_gcheader_definition(self, defnode):
return self.common_gcheader_definition(defnode)
def struct_gcheader_initdata(self, defnode):
return self.common_gcheader_initdata(defnode)
def array_gcheader_definition(self, defnode):
return self.common_gcheader_definition(defnode)
def array_gcheader_initdata(self, defnode):
return self.common_gcheader_initdata(defnode)
def compilation_info(self):
if not self.db:
return ExternalCompilationInfo()
gct = self.db.gctransformer
return ExternalCompilationInfo(
pre_include_bits=['/* using %s */' % (gct.__class__.__name__,),
'#define MALLOC_ZERO_FILLED %d' % (gct.malloc_zero_filled,),
],
post_include_bits=['typedef void *GC_hidden_pointer;']
)
def get_prebuilt_hash(self, obj):
return None
def need_no_typeptr(self):
return False
def gc_startup_code(self):
return []
def struct_setup(self, structdefnode, rtti):
return None
def array_setup(self, arraydefnode):
return None
def rtti_type(self):
return ''
def OP_GC_PUSH_ALIVE_PYOBJ(self, funcgen, op):
expr = funcgen.expr(op.args[0])
if expr == 'NULL':
return ''
return 'Py_XINCREF(%s);' % expr
def OP_GC_POP_ALIVE_PYOBJ(self, funcgen, op):
expr = funcgen.expr(op.args[0])
return 'Py_XDECREF(%s);' % expr
def OP_GC_SET_MAX_HEAP_SIZE(self, funcgen, op):
return ''
def OP_GC_THREAD_PREPARE(self, funcgen, op):
return ''
def OP_GC_THREAD_RUN(self, funcgen, op):
return ''
def OP_GC_THREAD_START(self, funcgen, op):
return ''
def OP_GC_THREAD_DIE(self, funcgen, op):
return ''
def OP_GC_THREAD_BEFORE_FORK(self, funcgen, op):
return '%s = NULL;' % funcgen.expr(op.result)
def OP_GC_THREAD_AFTER_FORK(self, funcgen, op):
return ''
def OP_GC_ASSUME_YOUNG_POINTERS(self, funcgen, op):
return ''
def OP_GC_STACK_BOTTOM(self, funcgen, op):
return ''
class RefcountingInfo:
static_deallocator = None
from pypy.rlib.objectmodel import CDefinedIntSymbolic
class RefcountingGcPolicy(BasicGcPolicy):
transformerclass = refcounting.RefcountingGCTransformer
def common_gcheader_initdata(self, defnode):
if defnode.db.gctransformer is not None:
gct = defnode.db.gctransformer
top = top_container(defnode.obj)
return gct.gcheaderbuilder.header_of_object(top)._obj
return None
# for structs
def struct_setup(self, structdefnode, rtti):
if rtti is not None:
transformer = structdefnode.db.gctransformer
fptr = transformer.static_deallocation_funcptr_for_type(
structdefnode.STRUCT)
structdefnode.gcinfo = RefcountingInfo()
structdefnode.gcinfo.static_deallocator = structdefnode.db.get(fptr)
# for arrays
def array_setup(self, arraydefnode):
pass
# for rtti node
def rtti_type(self):
return 'void (@)(void *)' # void dealloc_xx(struct xx *)
def rtti_node_factory(self):
return RefcountingRuntimeTypeInfo_OpaqueNode
# zero malloc impl
def OP_GC_CALL_RTTI_DESTRUCTOR(self, funcgen, op):
args = [funcgen.expr(v) for v in op.args]
line = '%s(%s);' % (args[0], ', '.join(args[1:]))
return line
def OP_GC_FREE(self, funcgen, op):
args = [funcgen.expr(v) for v in op.args]
return 'OP_FREE(%s);' % (args[0], )
def OP_GC__COLLECT(self, funcgen, op):
return ''
def OP_GC__DISABLE_FINALIZERS(self, funcgen, op):
return ''
def OP_GC__ENABLE_FINALIZERS(self, funcgen, op):
return ''
class RefcountingRuntimeTypeInfo_OpaqueNode(ContainerNode):
nodekind = 'refcnt rtti'
globalcontainer = True
typename = 'void (@)(void *)'
def __init__(self, db, T, obj):
assert T == RuntimeTypeInfo
assert isinstance(obj.about, RttiStruct)
self.db = db
self.T = T
self.obj = obj
defnode = db.gettypedefnode(obj.about)
self.implementationtypename = 'void (@)(void *)'
self.name = defnode.gcinfo.static_deallocator
def getptrname(self):
return '((void (*)(void *)) %s)' % (self.name,)
def enum_dependencies(self):
return []
def implementation(self):
return []
class BoehmInfo:
finalizer = None
class BoehmGcPolicy(BasicGcPolicy):
transformerclass = boehm.BoehmGCTransformer
def common_gcheader_initdata(self, defnode):
if defnode.db.gctransformer is not None:
hdr = lltype.malloc(defnode.db.gctransformer.HDR, immortal=True)
hdr.hash = lltype.identityhash_nocache(defnode.obj._as_ptr())
return hdr._obj
return None
def array_setup(self, arraydefnode):
pass
def struct_setup(self, structdefnode, rtti):
pass
def rtti_type(self):
return BoehmGcRuntimeTypeInfo_OpaqueNode.typename
def rtti_node_factory(self):
return BoehmGcRuntimeTypeInfo_OpaqueNode
def compilation_info(self):
eci = BasicGcPolicy.compilation_info(self)
from pypy.rpython.tool.rffi_platform import configure_boehm
eci = eci.merge(configure_boehm())
pre_include_bits = []
if sys.platform.startswith('linux'):
pre_include_bits += ["#define _REENTRANT 1",
"#define GC_LINUX_THREADS 1"]
if sys.platform != "win32" and not sys.platform.startswith("openbsd"):
# GC_REDIRECT_TO_LOCAL is not supported on Win32 by gc6.8
pre_include_bits += ["#define GC_REDIRECT_TO_LOCAL 1"]
eci = eci.merge(ExternalCompilationInfo(
pre_include_bits=pre_include_bits,
post_include_bits=['#define USING_BOEHM_GC'],
))
return eci
def gc_startup_code(self):
if sys.platform == 'win32':
pass # yield 'assert(GC_all_interior_pointers == 0);'
else:
yield 'GC_all_interior_pointers = 0;'
yield 'boehm_gc_startup_code();'
def get_real_weakref_type(self):
return boehm.WEAKLINK
def convert_weakref_to(self, ptarget):
return boehm.convert_weakref_to(ptarget)
def OP_GC__COLLECT(self, funcgen, op):
return 'GC_gcollect();'
def OP_GC_SET_MAX_HEAP_SIZE(self, funcgen, op):
nbytes = funcgen.expr(op.args[0])
return 'GC_set_max_heap_size(%s);' % (nbytes,)
def GC_KEEPALIVE(self, funcgen, v):
return 'pypy_asm_keepalive(%s);' % funcgen.expr(v)
class BoehmGcRuntimeTypeInfo_OpaqueNode(ContainerNode):
nodekind = 'boehm rtti'
globalcontainer = True
typename = 'char @'
def __init__(self, db, T, obj):
assert T == RuntimeTypeInfo
assert isinstance(obj.about, RttiStruct)
self.db = db
self.T = T
self.obj = obj
defnode = db.gettypedefnode(obj.about)
self.implementationtypename = self.typename
self.name = self.db.namespace.uniquename('g_rtti_v_'+ defnode.barename)
def getptrname(self):
return '(&%s)' % (self.name,)
def enum_dependencies(self):
return []
def implementation(self):
yield 'char %s /* uninitialized */;' % self.name
class FrameworkGcRuntimeTypeInfo_OpaqueNode(BoehmGcRuntimeTypeInfo_OpaqueNode):
nodekind = 'framework rtti'
# to get an idea how it looks like with no refcount/gc at all
class NoneGcPolicy(BoehmGcPolicy):
gc_startup_code = RefcountingGcPolicy.gc_startup_code.im_func
def compilation_info(self):
eci = BasicGcPolicy.compilation_info(self)
eci = eci.merge(ExternalCompilationInfo(
post_include_bits=['#define USING_NO_GC_AT_ALL'],
))
return eci
class FrameworkGcPolicy(BasicGcPolicy):
transformerclass = framework.FrameworkGCTransformer
stores_hash_at_the_end = True
def struct_setup(self, structdefnode, rtti):
if rtti is not None and hasattr(rtti._obj, 'destructor_funcptr'):
destrptr = rtti._obj.destructor_funcptr
# make sure this is seen by the database early, i.e. before
# finish_helpers() on the gctransformer
self.db.get(destrptr)
# the following, on the other hand, will only discover ll_finalizer
# helpers. The get() sees and records a delayed pointer. It is
# still important to see it so that it can be followed as soon as
# the mixlevelannotator resolves it.
gctransf = self.db.gctransformer
fptr = gctransf.finalizer_funcptr_for_type(structdefnode.STRUCT)
self.db.get(fptr)
def array_setup(self, arraydefnode):
pass
def rtti_type(self):
return FrameworkGcRuntimeTypeInfo_OpaqueNode.typename
def rtti_node_factory(self):
return FrameworkGcRuntimeTypeInfo_OpaqueNode
def gc_startup_code(self):
fnptr = self.db.gctransformer.frameworkgc_setup_ptr.value
yield '%s();' % (self.db.get(fnptr),)
def get_real_weakref_type(self):
return framework.WEAKREF
def convert_weakref_to(self, ptarget):
return framework.convert_weakref_to(ptarget)
def OP_GC_RELOAD_POSSIBLY_MOVED(self, funcgen, op):
if isinstance(op.args[1], Constant):
return '/* %s */' % (op,)
else:
args = [funcgen.expr(v) for v in op.args]
return '%s = %s; /* for moving GCs */' % (args[1], args[0])
def common_gcheader_initdata(self, defnode):
o = top_container(defnode.obj)
needs_hash = self.get_prebuilt_hash(o) is not None
hdr = defnode.db.gctransformer.gc_header_for(o, needs_hash)
return hdr._obj
def get_prebuilt_hash(self, obj):
# for prebuilt objects that need to have their hash stored and
# restored. Note that only structures that are StructNodes all
# the way have their hash stored (and not e.g. structs with var-
# sized arrays at the end). 'obj' must be the top_container.
TYPE = typeOf(obj)
if not isinstance(TYPE, lltype.GcStruct):
return None
if TYPE._is_varsize():
return None
return getattr(obj, '_hash_cache_', None)
def need_no_typeptr(self):
config = self.db.translator.config
return config.translation.gcremovetypeptr
def OP_GC_GETTYPEPTR_GROUP(self, funcgen, op):
# expands to a number of steps, as per rpython/lltypesystem/opimpl.py,
# all implemented by a single call to a C macro.
[v_obj, c_grpptr, c_skipoffset, c_vtableinfo] = op.args
typename = funcgen.db.gettype(op.result.concretetype)
tid_field = c_vtableinfo.value[2]
# Fish out the C name of the tid field.
HDR = self.db.gctransformer.HDR
hdr_node = self.db.gettypedefnode(HDR)
fieldname = hdr_node.c_struct_field_name(tid_field)
return (
'%s = (%s)_OP_GET_NEXT_GROUP_MEMBER(%s, (pypy_halfword_t)%s->'
'_gcheader.%s, %s);'
% (funcgen.expr(op.result),
cdecl(typename, ''),
funcgen.expr(c_grpptr),
funcgen.expr(v_obj),
fieldname,
funcgen.expr(c_skipoffset)))
class AsmGcRootFrameworkGcPolicy(FrameworkGcPolicy):
transformerclass = asmgcroot.AsmGcRootFrameworkGCTransformer
def GC_KEEPALIVE(self, funcgen, v):
return 'pypy_asm_keepalive(%s);' % funcgen.expr(v)
def OP_GC_STACK_BOTTOM(self, funcgen, op):
return 'pypy_asm_stack_bottom();'
name_to_gcpolicy = {
'boehm': BoehmGcPolicy,
'ref': RefcountingGcPolicy,
'none': NoneGcPolicy,
'framework': FrameworkGcPolicy,
'framework+asmgcroot': AsmGcRootFrameworkGcPolicy,
}
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