merge

.hgtags

@@ -6,3 +6,4 @@ a09347d7b470290076b983aef98707921445a038 0.9.8.1
 a89b05b78236a27a654f3004bdffc7b8a56311a7 0.10
 ef9d2c680684d0df7d81f529cda29e9e1741f575 cython-0.10.1
 92baafe0edf3cea00deb7ce1e31e337bb485af1a 0.10.2
+cdf889c30e7a7053de20bae3a578dad09ebcbdf5 0.10.3

Cython/Compiler/Buffer.py

@@ -64,6 +64,9 @@ class IntroduceBufferAuxiliaryVars(CythonTransform):
             # for now...note that pos is wrong 
             raise CompileError(node.pos, "Buffer vars not allowed in module scope")
         for entry in bufvars:
+            if entry.type.dtype.is_ptr:
+                raise CompileError(node.pos, "Buffers with pointer types not yet supported.")
+            
             name = entry.name
             buftype = entry.type
             if buftype.ndim > self.max_ndim:
@@ -497,7 +500,7 @@ def mangle_dtype_name(dtype):
     elif dtype.is_ptr:
         return "ptr"
     else:
-        if dtype.typestring is None:
+        if dtype.is_typedef or dtype.is_struct_or_union:
             prefix = "nn_"
         else:
             prefix = ""
@@ -549,10 +552,8 @@ def create_typestringchecker(protocode, defcode, name, dtype):
         defcode.putln("int ok;")
         defcode.putln("ts = __Pyx_ConsumeWhitespace(ts); if (!ts) return NULL;")
         defcode.putln("if (*ts == '1') ++ts;")
-        if dtype.typestring is not None:
-            assert len(dtype.typestring) == 1
-            # Can use direct comparison
-            defcode.putln("ok = (*ts == '%s');" % dtype.typestring)
+        if dtype.is_pyobject:
+            defcode.putln("ok = (*ts == 'O');")
         else:
             # Cannot trust declared size; but rely on int vs float and
             # signed/unsigned to be correctly declared. Use a switch statement

Cython/Compiler/Code.py

@@ -10,6 +10,7 @@ from PyrexTypes import py_object_type, typecast
 from TypeSlots import method_coexist
 from Scanning import SourceDescriptor
 from Cython.StringIOTree import StringIOTree
+import DebugFlags
 try:
     set
 except NameError:
@@ -737,47 +738,53 @@ class CCodeWriter(object):
     def as_pyobject(self, cname, type):
         return typecast(py_object_type, type, cname)
     
+    def put_gotref(self, cname):
+        self.putln("__Pyx_GOTREF(%s);" % cname)
+    
+    def put_giveref(self, cname):
+        self.putln("__Pyx_GIVEREF(%s);" % cname)
+    
     def put_incref(self, cname, type):
-        self.putln("Py_INCREF(%s);" % self.as_pyobject(cname, type))
+        self.putln("__Pyx_INCREF(%s);" % self.as_pyobject(cname, type))
     
     def put_decref(self, cname, type):
-        self.putln("Py_DECREF(%s);" % self.as_pyobject(cname, type))
+        self.putln("__Pyx_DECREF(%s);" % self.as_pyobject(cname, type))
     
     def put_var_incref(self, entry):
         if entry.type.is_pyobject:
-            self.putln("Py_INCREF(%s);" % self.entry_as_pyobject(entry))
+            self.putln("__Pyx_INCREF(%s);" % self.entry_as_pyobject(entry))
     
     def put_decref_clear(self, cname, type):
-        self.putln("Py_DECREF(%s); %s = 0;" % (
+        self.putln("__Pyx_DECREF(%s); %s = 0;" % (
             typecast(py_object_type, type, cname), cname))
             #self.as_pyobject(cname, type), cname))
     
     def put_xdecref(self, cname, type):
-        self.putln("Py_XDECREF(%s);" % self.as_pyobject(cname, type))
+        self.putln("__Pyx_XDECREF(%s);" % self.as_pyobject(cname, type))
     
     def put_xdecref_clear(self, cname, type):
-        self.putln("Py_XDECREF(%s); %s = 0;" % (
+        self.putln("__Pyx_XDECREF(%s); %s = 0;" % (
             self.as_pyobject(cname, type), cname))
 
     def put_var_decref(self, entry):
         if entry.type.is_pyobject:
             if entry.init_to_none is False:
-                self.putln("Py_XDECREF(%s);" % self.entry_as_pyobject(entry))
+                self.putln("__Pyx_XDECREF(%s);" % self.entry_as_pyobject(entry))
             else:
-                self.putln("Py_DECREF(%s);" % self.entry_as_pyobject(entry))
+                self.putln("__Pyx_DECREF(%s);" % self.entry_as_pyobject(entry))
     
     def put_var_decref_clear(self, entry):
         if entry.type.is_pyobject:
-            self.putln("Py_DECREF(%s); %s = 0;" % (
+            self.putln("__Pyx_DECREF(%s); %s = 0;" % (
                 self.entry_as_pyobject(entry), entry.cname))
     
     def put_var_xdecref(self, entry):
         if entry.type.is_pyobject:
-            self.putln("Py_XDECREF(%s);" % self.entry_as_pyobject(entry))
+            self.putln("__Pyx_XDECREF(%s);" % self.entry_as_pyobject(entry))
     
     def put_var_xdecref_clear(self, entry):
         if entry.type.is_pyobject:
-            self.putln("Py_XDECREF(%s); %s = 0;" % (
+            self.putln("__Pyx_XDECREF(%s); %s = 0;" % (
                 self.entry_as_pyobject(entry), entry.cname))
     
     def put_var_decrefs(self, entries, used_only = 0):
@@ -798,7 +805,7 @@ class CCodeWriter(object):
     
     def put_init_to_py_none(self, cname, type):
         py_none = typecast(type, py_object_type, "Py_None")
-        self.putln("%s = %s; Py_INCREF(Py_None);" % (cname, py_none))
+        self.putln("%s = %s; __Pyx_INCREF(Py_None);" % (cname, py_none))
     
     def put_init_var_to_py_none(self, entry, template = "%s"):
         code = template % entry.cname
@@ -837,20 +844,24 @@ class CCodeWriter(object):
         else:
             return cond
 
-    def error_goto(self, pos):
-        lbl = self.funcstate.error_label
-        self.funcstate.use_label(lbl)
+    def set_error_info(self, pos):
         if Options.c_line_in_traceback:
             cinfo = " %s = %s;" % (Naming.clineno_cname, Naming.line_c_macro)
         else:
             cinfo = ""
-        return "{%s = %s[%s]; %s = %s;%s goto %s;}" % (
+        return "%s = %s[%s]; %s = %s;%s" % (
             Naming.filename_cname,
             Naming.filetable_cname,
             self.lookup_filename(pos[0]),
             Naming.lineno_cname,
             pos[1],
-            cinfo,
+            cinfo)
+        
+    def error_goto(self, pos):
+        lbl = self.funcstate.error_label
+        self.funcstate.use_label(lbl)
+        return "{%s goto %s;}" % (
+            self.set_error_info(pos),
             lbl)
 
     def error_goto_if(self, cond, pos):

Cython/Compiler/DebugFlags.py

@@ -3,3 +3,4 @@ debug_temp_alloc = 0
 debug_coercion = 0
 
 debug_temp_code_comments = 1
+

Cython/Compiler/ModuleNode.py

@@ -19,6 +19,7 @@ import Options
 import PyrexTypes
 import TypeSlots
 import Version
+import DebugFlags
 
 from Errors import error, warning
 from PyrexTypes import py_object_type
@@ -250,6 +251,8 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
         code.globalstate.module_pos = self.pos
         code.globalstate.directives = self.directives
 
+        code.globalstate.use_utility_code(refcount_utility_code)
+
         code.putln("")
         code.putln("/* Implementation of %s */" % env.qualified_name)
         self.generate_const_definitions(env, code)
@@ -1586,6 +1589,9 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
         code.putln("#endif")
         code.putln("{")
         tempdecl_code = code.insertion_point()
+
+        code.putln('__Pyx_SetupRefcountContext("%s");' % header3)
+
         code.putln("%s = PyTuple_New(0); %s" % (Naming.empty_tuple, code.error_goto_if_null(Naming.empty_tuple, self.pos)));
 
         code.putln("/*--- Library function declarations ---*/")
@@ -2312,3 +2318,36 @@ bad:
 }
 """ % {'IMPORT_STAR'     : Naming.import_star,
        'IMPORT_STAR_SET' : Naming.import_star_set }
+        
+refcount_utility_code = UtilityCode(proto="""
+#ifdef CYTHON_REFNANNY
+
+void __Pyx_Refnanny_INCREF(void*, PyObject*, int);
+void __Pyx_Refnanny_GOTREF(void*, PyObject*, int);
+void __Pyx_Refnanny_GIVEREF(void*, PyObject*, int);
+void __Pyx_Refnanny_INCREF(void*, PyObject*, int);
+void __Pyx_Refnanny_DECREF(void*, PyObject*, int);
+void* __Pyx_Refnanny_NewContext(char*, int);
+int __Pyx_Refnanny_FinishContext(void*);
+
+#define __Pyx_INCREF(r) __Pyx_Refnanny_INCREF(__pyx_refchk, r, __LINE__)
+#define __Pyx_GOTREF(r) __Pyx_Refnanny_GOTREF(__pyx_refchk, r, __LINE__)
+#define __Pyx_GIVEREF(r) __Pyx_Refnanny_GIVEREF(__pyx_refchk, r, __LINE__)
+#define __Pyx_DECREF(r) __Pyx_Refnanny_DECREF(__pyx_refchk, r, __LINE__)
+#define __Pyx_XDECREF(r) (r ? __Pyx_Refnanny_DECREF(__pyx_refchk, r, __LINE__) : 0)
+#define __Pyx_SetupRefcountContext(name) \
+  void* __pyx_refchk = __Pyx_Refnanny_NewContext(name, __LINE__)
+#define __Pyx_FinishRefcountContext() __Pyx_Refnanny_FinishContext(__pyx_refchk)
+
+#else
+
+#define __Pyx_INCREF(r) Py_INCREF(r)
+#define __Pyx_GOTREF(r)
+#define __Pyx_GIVEREF(r)
+#define __Pyx_DECREF(r) Py_DECREF(r)
+#define __Pyx_XDECREF(r) Py_XDECREF(r)
+#define __Pyx_SetupRefcountContext(name)
+#define __Pyx_FinishRefcountContext() 0
+
+#endif /* CYTHON_REFNANNY */
+""")

Cython/Compiler/Nodes.py

@@ -17,6 +17,7 @@ from Cython.Utils import open_new_file, replace_suffix, UtilityCode
 from StringEncoding import EncodedString, escape_byte_string, split_docstring
 import Options
 import ControlFlow
+import DebugFlags
 
 from DebugFlags import debug_disposal_code
 
@@ -1022,6 +1023,7 @@ class FuncDefNode(StatNode, BlockNode):
         # ----- Automatic lead-ins for certain special functions
         if is_getbuffer_slot:
             self.getbuffer_init(code)
+        code.putln('__Pyx_SetupRefcountContext("%s");' % self.entry.name)
         # ----- Fetch arguments
         self.generate_argument_parsing_code(env, code)
         # If an argument is assigned to in the body, we must 
@@ -1135,8 +1137,24 @@ class FuncDefNode(StatNode, BlockNode):
             code.putln("PyGILState_Release(_save);")
         # code.putln("/* TODO: decref scope object */")
         # ----- Return
+        default_retval = self.return_type.default_value
+        err_val = self.error_value()
+        if err_val is None and default_retval:
+            err_val = default_retval
+        if self.return_type.is_pyobject:
+            code.put_giveref(Naming.retval_cname)
+        if err_val is None:
+            code.putln('__Pyx_FinishRefcountContext();')
+        else:
+            code.putln('if (__Pyx_FinishRefcountContext() == -1) {')
+            code.putln(code.set_error_info(self.pos))
+            code.putln('__Pyx_AddTraceback("%s");' % self.entry.qualified_name)
+            code.putln('%s = %s;' % (Naming.retval_cname, err_val))
+            code.putln('}')
+
         if not self.return_type.is_void:
             code.putln("return %s;" % Naming.retval_cname)
+            
         code.putln("}")
         # ----- Go back and insert temp variable declarations
         tempvardecl_code.put_var_declarations(lenv.temp_entries)
@@ -1188,16 +1206,16 @@ class FuncDefNode(StatNode, BlockNode):
         # getbuffer with a NULL parameter. For now we work around this;
         # the following line should be removed when this bug is fixed.
         code.putln("if (%s == NULL) return 0;" % info) 
-        code.putln("%s->obj = Py_None; Py_INCREF(Py_None);" % info)
+        code.putln("%s->obj = Py_None; __Pyx_INCREF(Py_None);" % info)
 
     def getbuffer_error_cleanup(self, code):
         info = self.local_scope.arg_entries[1].cname
-        code.putln("Py_DECREF(%s->obj); %s->obj = NULL;" %
+        code.putln("__Pyx_DECREF(%s->obj); %s->obj = NULL;" %
                    (info, info))
 
     def getbuffer_normal_cleanup(self, code):
         info = self.local_scope.arg_entries[1].cname
-        code.putln("if (%s->obj == Py_None) { Py_DECREF(Py_None); %s->obj = NULL; }" %
+        code.putln("if (%s->obj == Py_None) { __Pyx_DECREF(Py_None); %s->obj = NULL; }" %
                    (info, info))
 
 class CFuncDefNode(FuncDefNode):
@@ -2268,6 +2286,7 @@ class DefNode(FuncDefNode):
                 func,
                 arg.hdr_cname,
                 code.error_goto_if_null(arg.entry.cname, arg.pos)))
+            code.put_gotref(arg.entry.cname)
         else:
             error(arg.pos,
                 "Cannot convert argument of type '%s' to Python object"
@@ -2347,6 +2366,7 @@ class OverrideCheckNode(StatNode):
         else:
             code.putln("else if (unlikely(Py_TYPE(%s)->tp_dictoffset != 0)) {" % self_arg)
         err = code.error_goto_if_null(self.func_node.result(), self.pos)
+        code.put_gotref(self.func_node.result())
         # need to get attribute manually--scope would return cdef method
         code.putln("%s = PyObject_GetAttr(%s, %s); %s" % (self.func_node.result(), self_arg, self.py_func.interned_attr_cname, err))
         # It appears that this type is not anywhere exposed in the Python/C API
@@ -3047,6 +3067,7 @@ class InPlaceAssignmentNode(AssignmentNode):
                     self.rhs.py_result(),
                     extra,
                     code.error_goto_if_null(self.result_value.py_result(), self.pos)))
+            code.put_gotref(self.result_value.result())
             self.result_value.generate_evaluation_code(code) # May be a type check...
             self.rhs.generate_disposal_code(code)
             self.rhs.free_temps(code)
@@ -3981,6 +4002,7 @@ class TryExceptStatNode(StatNode):
         except_end_label = code.new_label('exception_handled')
         except_error_label = code.new_label('except_error')
         except_return_label = code.new_label('except_return')
+        try_return_label = code.new_label('try_return')
         try_end_label = code.new_label('try')
 
         code.putln("{")
@@ -3990,6 +4012,7 @@ class TryExceptStatNode(StatNode):
                    ', '.join(['&%s' % var for var in Naming.exc_save_vars]))
         code.putln(
             "/*try:*/ {")
+        code.return_label = try_return_label
         self.body.generate_execution_code(code)
         code.putln(
             "}")
@@ -4005,6 +4028,11 @@ class TryExceptStatNode(StatNode):
         for var in Naming.exc_save_vars:
             code.put_xdecref_clear(var, py_object_type)
         code.put_goto(try_end_label)
+        if code.label_used(try_return_label):
+            code.put_label(try_return_label)
+            for var in Naming.exc_save_vars:
+                code.put_xdecref_clear(var, py_object_type)
+            code.put_goto(old_return_label)
         code.put_label(our_error_label)
         code.put_var_xdecrefs_clear(self.cleanup_list)
         for temp_name, type in temps_to_clean_up:
@@ -4138,7 +4166,7 @@ class ExceptClauseNode(Node):
         self.body.generate_execution_code(code)
         code.funcstate.exc_vars = old_exc_vars
         for var in self.exc_vars:
-            code.putln("Py_DECREF(%s); %s = 0;" % (var, var))
+            code.putln("__Pyx_DECREF(%s); %s = 0;" % (var, var))
         code.put_goto(end_label)
         code.putln(
             "}")
@@ -4551,6 +4579,7 @@ class FromImportStatNode(StatNode):
                     self.module.py_result(),
                     cname,
                     code.error_goto_if_null(self.item.result(), self.pos)))
+            code.put_gotref(self.item.result())
             target.generate_assignment_code(self.item, code)
         self.module.generate_disposal_code(code)
         self.module.free_temps(code)

Cython/Compiler/PyrexTypes.py

@@ -49,7 +49,6 @@ class PyrexType(BaseType):
     #  default_value         string      Initial value
     #  parsetuple_format     string      Format char for PyArg_ParseTuple
     #  pymemberdef_typecode  string      Type code for PyMemberDef struct
-    #  typestring            string      String char defining the type (see Python struct module)
     #
     #  declaration_code(entity_code, 
     #      for_display = 0, dll_linkage = None, pyrex = 0)
@@ -101,7 +100,6 @@ class PyrexType(BaseType):
     default_value = ""
     parsetuple_format = ""
     pymemberdef_typecode = None
-    typestring = None
     
     def resolve(self):
         # If a typedef, returns the base type.
@@ -157,7 +155,6 @@ class CTypedefType(BaseType):
     #  typedef_base_type   PyrexType
     
     is_typedef = 1
-    typestring = None # Because typedefs are not known exactly
     
     def __init__(self, cname, base_type):
         self.typedef_cname = cname
@@ -243,7 +240,6 @@ class PyObjectType(PyrexType):
     parsetuple_format = "O"
     pymemberdef_typecode = "T_OBJECT"
     buffer_defaults = None
-    typestring = "O"
     
     def __str__(self):
         return "Python object"
@@ -469,10 +465,9 @@ class CNumericType(CType):
     
     sign_words = ("unsigned ", "", "signed ")
     
-    def __init__(self, rank, signed = 1, pymemberdef_typecode = None, typestring = None):
+    def __init__(self, rank, signed = 1, pymemberdef_typecode = None):
         self.rank = rank
         self.signed = signed
-        self.typestring = typestring
         ptf = self.parsetuple_formats[signed][rank]
         if ptf == '?':
             ptf = None
@@ -507,9 +502,8 @@ class CIntType(CNumericType):
     from_py_function = "__pyx_PyInt_AsLong"
     exception_value = -1
 
-    def __init__(self, rank, signed, pymemberdef_typecode = None, is_returncode = 0,
-                 typestring=None):
-        CNumericType.__init__(self, rank, signed, pymemberdef_typecode, typestring=typestring)
+    def __init__(self, rank, signed, pymemberdef_typecode = None, is_returncode = 0):
+        CNumericType.__init__(self, rank, signed, pymemberdef_typecode)
         self.is_returncode = is_returncode
         if self.from_py_function == '__pyx_PyInt_AsLong':
             self.from_py_function = self.get_type_conversion()
@@ -602,8 +596,8 @@ class CFloatType(CNumericType):
     to_py_function = "PyFloat_FromDouble"
     from_py_function = "__pyx_PyFloat_AsDouble"
     
-    def __init__(self, rank, pymemberdef_typecode = None, typestring=None):
-        CNumericType.__init__(self, rank, 1, pymemberdef_typecode, typestring = typestring)
+    def __init__(self, rank, pymemberdef_typecode = None):
+        CNumericType.__init__(self, rank, 1, pymemberdef_typecode)
     
     def assignable_from_resolved_type(self, src_type):
         return src_type.is_numeric or src_type is error_type
@@ -1133,7 +1127,6 @@ class ErrorType(PyrexType):
     exception_check	= 0
     to_py_function = "dummy"
     from_py_function = "dummy"
-    typestring = None
     
     def create_convert_utility_code(self, env):
         return True
@@ -1167,29 +1160,29 @@ c_void_type =         CVoidType()
 c_void_ptr_type =     CPtrType(c_void_type)
 c_void_ptr_ptr_type = CPtrType(c_void_ptr_type)
 
-c_uchar_type =       CIntType(0, 0, "T_UBYTE", typestring="B")
-c_ushort_type =      CIntType(1, 0, "T_USHORT", typestring="H")
-c_uint_type =        CUIntType(2, 0, "T_UINT", typestring="I")
-c_ulong_type =       CULongType(3, 0, "T_ULONG", typestring="L")
-c_ulonglong_type =   CULongLongType(4, 0, "T_ULONGLONG", typestring="Q")
-
-c_char_type =        CIntType(0, 1, "T_CHAR", typestring="b")
-c_short_type =       CIntType(1, 1, "T_SHORT", typestring="h")
-c_int_type =         CIntType(2, 1, "T_INT", typestring="i")
-c_long_type =        CIntType(3, 1, "T_LONG", typestring="l")
-c_longlong_type =    CLongLongType(4, 1, "T_LONGLONG", typestring="q")
+c_uchar_type =       CIntType(0, 0, "T_UBYTE")
+c_ushort_type =      CIntType(1, 0, "T_USHORT")
+c_uint_type =        CUIntType(2, 0, "T_UINT")
+c_ulong_type =       CULongType(3, 0, "T_ULONG")
+c_ulonglong_type =   CULongLongType(4, 0, "T_ULONGLONG")
+
+c_char_type =        CIntType(0, 1, "T_CHAR")
+c_short_type =       CIntType(1, 1, "T_SHORT")
+c_int_type =         CIntType(2, 1, "T_INT")
+c_long_type =        CIntType(3, 1, "T_LONG")
+c_longlong_type =    CLongLongType(4, 1, "T_LONGLONG")
 c_py_ssize_t_type =  CPySSizeTType(5, 1)
-c_bint_type =        CBIntType(2, 1, "T_INT", typestring="i")
+c_bint_type =        CBIntType(2, 1, "T_INT")
 
-c_schar_type =       CIntType(0, 2, "T_CHAR", typestring="b")
-c_sshort_type =      CIntType(1, 2, "T_SHORT", typestring="h")
-c_sint_type =        CIntType(2, 2, "T_INT", typestring="i")
-c_slong_type =       CIntType(3, 2, "T_LONG", typestring="l")
-c_slonglong_type =   CLongLongType(4, 2, "T_LONGLONG", typestring="q")
+c_schar_type =       CIntType(0, 2, "T_CHAR")
+c_sshort_type =      CIntType(1, 2, "T_SHORT")
+c_sint_type =        CIntType(2, 2, "T_INT")
+c_slong_type =       CIntType(3, 2, "T_LONG")
+c_slonglong_type =   CLongLongType(4, 2, "T_LONGLONG")
 
-c_float_type =       CFloatType(6, "T_FLOAT", typestring="f")
-c_double_type =      CFloatType(7, "T_DOUBLE", typestring="d")
-c_longdouble_type =  CFloatType(8, typestring="g")
+c_float_type =       CFloatType(6, "T_FLOAT")
+c_double_type =      CFloatType(7, "T_DOUBLE")
+c_longdouble_type =  CFloatType(8)
 
 c_null_ptr_type =     CNullPtrType(c_void_type)
 c_char_array_type =   CCharArrayType(None)

Cython/Compiler/Version.py

-version = '0.10.2'
+version = '0.10.3'

Cython/Compiler/Visitor.py

@@ -26,19 +26,19 @@ class BasicVisitor(object):
             # Must resolve, try entire hierarchy
             pattern = "visit_%s"
             mro = inspect.getmro(cls)
+            handler_method = None
             for mro_cls in mro:
-                try:
+                if hasattr(self, pattern % mro_cls.__name__):
                     handler_method = getattr(self, pattern % mro_cls.__name__)
                     break
-                except AttributeError:
-                    pass
-            else:
+            if handler_method is None:
                 print type(self), type(obj)
                 if hasattr(self, 'access_path') and self.access_path:
                     print self.access_path
+                    if self.access_path:
                         print self.access_path[-1][0].pos
                         print self.access_path[-1][0].__dict__
-                raise RuntimeError("Visitor does not accept object: %s" % (obj,))
+                raise RuntimeError("Visitor does not accept object: %s" % obj)
             #print "Caching " + cls.__name__
             self.dispatch_table[cls] = handler_method
         return handler_method(obj)

Cython/Runtime/build.sh

+cat <<EOF > ../../Cython/Compiler/DebugFlags.py
+debug_disposal_code = 0
+debug_temp_alloc = 0
+debug_coercion = 0
+
+debug_refnanny = 0
+EOF
+
+
+python ../../cython.py refnanny.pyx
+gcc -shared -pthread -fPIC -fwrapv -O2 -Wall \
+  -fno-strict-aliasing -I/local/include/python2.5 \
+  -o refnanny.so -I. refnanny.c
+
+cat <<EOF > ../../Cython/Compiler/DebugFlags.py
+debug_disposal_code = 0
+debug_temp_alloc = 0
+debug_coercion = 0
+
+debug_refnanny = 1
+EOF

Cython/Runtime/refnanny.pyx

+from python_ref cimport Py_INCREF, Py_DECREF
+
+loglevel = 0
+reflog = []
+
+cdef log(level, action, obj, lineno):
+    if loglevel >= level:
+        reflog.append((lineno, action, id(obj)))
+
+LOG_NONE, LOG_ALL = range(2)
+
+class RefnannyException(Exception):
+    pass
+
+class RefnannyContext(object):
+    def __init__(self):
+        self.refs = {} # id -> (count, [lineno])
+        self.errors = []
+
+    def regref(self, obj, lineno):
+        log(LOG_ALL, 'regref', obj, lineno)
+        id_ = id(obj)
+        count, linenumbers = self.refs.get(id_, (0, []))
+        self.refs[id_] = (count + 1, linenumbers)
+        linenumbers.append(lineno)
+
+    def delref(self, obj, lineno):
+        log(LOG_ALL, 'delref', obj, lineno)
+        id_ = id(obj)
+        count, linenumbers = self.refs.get(id_, (0, []))
+        if count == 0:
+            self.errors.append("Too many decrefs on line %d, reference acquired on lines %r" %
+                (lineno, linenumbers))
+        elif count == 1:
+            del self.refs[id_]
+        else:
+            self.refs[id_] = (count - 1, linenumbers)
+
+    def end(self):
+        if len(self.refs) > 0:
+            msg = ""
+            for count, linenos in self.refs.itervalues():
+                msg += "\n  Acquired on lines: " + ", ".join(["%d" % x for x in linenos])
+            self.errors.append("References leaked: %s" % msg)
+        if self.errors:
+            raise RefnannyException("\n".join(self.errors))
+
+cdef public void* __Pyx_Refnanny_NewContext(char* funcname, int lineno) except NULL:
+    ctx = RefnannyContext()
+    Py_INCREF(ctx)
+    return <void*>ctx
+
+cdef public void __Pyx_Refnanny_GOTREF(void* ctx, object obj, int lineno):
+    if ctx == NULL: return
+    (<object>ctx).regref(obj, lineno)
+
+cdef public void __Pyx_Refnanny_GIVEREF(void* ctx, object obj, int lineno):
+    if ctx == NULL: return
+    (<object>ctx).delref(obj, lineno)
+
+cdef public void __Pyx_Refnanny_INCREF(void* ctx, object obj, int lineno):
+    Py_INCREF(obj)
+    __Pyx_Refnanny_GOTREF(ctx, obj, lineno)
+    
+cdef public void __Pyx_Refnanny_DECREF(void* ctx, object obj, int lineno):
+    # GIVEREF raises exception if we hit 0
+    # 
+    __Pyx_Refnanny_GIVEREF(ctx, obj, lineno)
+    Py_DECREF(obj)
+    
+cdef public int __Pyx_Refnanny_FinishContext(void* ctx) except -1:
+    obj = <object>ctx
+    try:
+        obj.end()
+    finally:
+        Py_DECREF(obj)
+    return 0
+
+    

runtests.py

 #!/usr/bin/python
 
-import os, sys, re, shutil, unittest, doctest
+import os, sys, re, shutil, unittest, doctest, ctypes
 
 WITH_CYTHON = True
 
@@ -480,6 +480,9 @@ if __name__ == '__main__':
     parser.add_option("--cython-only", dest="cython_only",
                       action="store_true", default=False,
                       help="only compile pyx to c, do not run C compiler or run the tests")
+    parser.add_option("--refnanny", dest="with_refnanny",
+                      action="store_true", default=False,
+                      help="also test that Cython-generated code does correct reference counting")
     parser.add_option("--sys-pyregr", dest="system_pyregr",
                       action="store_true", default=False,
                       help="run the regression tests of the CPython installation")
@@ -523,6 +526,13 @@ if __name__ == '__main__':
         from Cython.Compiler import Errors
         Errors.LEVEL = 0 # show all warnings
 
+    if options.with_refnanny:
+        ctypes.PyDLL("Cython/Runtime/refnanny.so", mode=ctypes.RTLD_GLOBAL)
+        sys.path.append("Cython/Runtime")
+        import refnanny
+        del sys.path[-1]
+        CFLAGS.append("-DCYTHON_REFNANNY")
+
     # RUN ALL TESTS!
     ROOTDIR = os.path.join(os.getcwd(), os.path.dirname(sys.argv[0]), 'tests')
     WORKDIR = os.path.join(os.getcwd(), 'BUILD')
@@ -603,3 +613,6 @@ if __name__ == '__main__':
         sys.stderr.write("Following tests excluded because of missing dependencies on your system:\n")
         for test in missing_dep_excluder.tests_missing_deps:
             sys.stderr.write("   %s\n" % test)
+
+    if options.with_refnanny:
+        sys.stderr.write("\n".join([repr(x) for x in refnanny.reflog]))

tests/run/bufaccess.pyx

@@ -384,6 +384,17 @@ def wrong_string(object[int] buf):
     """
     print buf[1]
 
+@testcase
+def int_and_long_are_same():
+    """
+    >>> int_and_long_are_same()
+    """
+    cdef object[int] intarr
+    cdef object[long] longarr
+    if sizeof(int) == sizeof(long):
+        intarr = IntMockBuffer(None, [1,2], format='l')
+        longarr = IntMockBuffer(None, [1,2])
+
 #
 # Getting items and index bounds checking
 #