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Commit c59e2200 authored by Jeremy Hylton's avatar Jeremy Hylton
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Handle private names 

(Hard to believe these were never handled before)

Add misc.mangle() that mangles based on the rules in compile.c.
XXX Need to test the corner cases

Update CodeGenerator with a class_name attribute bound to None.  If a
particular instance is created within a class scope, the instance's
class_name is bound to that class's name.

Add mangle() method to CodeGenerator that mangles if the class_name
has a class_name in it.

Modify the FunctionCodeGenerator family to handle an extra argument--
the class_name.

Wrap all name ops and attrnames in calls to self.mangle()
parent e7d83226
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Inline Side-by-side
Showing with 100 additions and 40 deletions
Lib/compiler/misc.py
View file @ c59e2200
......@@ -39,3 +39,26 @@ class Stack:
self.stack.append(elt)
def top(self):
return self.stack[-1]
MANGLE_LEN = 256 # magic constant from compile.c
def mangle(name, klass):
if not name.startswith('__'):
return name
if len(name) + 2 >= MANGLE_LEN:
return name
if name.endswith('__'):
return name
try:
i = 0
while klass[i] == '_':
i = i + 1
except IndexError:
return name
klass = klass[i:]
tlen = len(klass) + len(name)
if tlen > MANGLE_LEN:
klass = klass[:MANGLE_LEN-tlen]
return "_%s%s" % (klass, name)
Lib/compiler/pycodegen.py
View file @ c59e2200
......@@ -117,9 +117,6 @@ def is_constant_false(node):
return 1
return 0
def mangle(name):
return name
class CodeGenerator:
"""Defines basic code generator for Python bytecode
......@@ -136,6 +133,7 @@ class CodeGenerator:
optimized = 0 # is namespace access optimized?
__initialized = None
class_name = None # provide default for instance variable
def __init__(self, filename):
if self.__initialized is None:
......@@ -175,6 +173,12 @@ class CodeGenerator:
"""Return a code object"""
return self.graph.getCode()
def mangle(self, name):
if self.class_name is not None:
return misc.mangle(name, self.class_name)
else:
return name
# Next five methods handle name access
def isLocalName(self, name):
......@@ -190,6 +194,7 @@ class CodeGenerator:
self._nameOp('DELETE', name)
def _nameOp(self, prefix, name):
name = self.mangle(name)
if not self.optimized:
self.emit(prefix + '_NAME', name)
return
......@@ -258,7 +263,8 @@ class CodeGenerator:
self._visitFuncOrLambda(node, isLambda=1)
def _visitFuncOrLambda(self, node, isLambda=0):
gen = self.FunctionGen(node, self.filename, self.scopes, isLambda)
gen = self.FunctionGen(node, self.filename, self.scopes, isLambda,
self.class_name)
walk(node.code, gen)
gen.finish()
self.set_lineno(node)
......@@ -645,7 +651,7 @@ class CodeGenerator:
def visitGetattr(self, node):
self.visit(node.expr)
self.emit('LOAD_ATTR', node.attrname)
self.emit('LOAD_ATTR', self.mangle(node.attrname))
# next five implement assignments
......@@ -671,9 +677,9 @@ class CodeGenerator:
def visitAssAttr(self, node):
self.visit(node.expr)
if node.flags == 'OP_ASSIGN':
self.emit('STORE_ATTR', node.attrname)
self.emit('STORE_ATTR', self.mangle(node.attrname))
elif node.flags == 'OP_DELETE':
self.emit('DELETE_ATTR', node.attrname)
self.emit('DELETE_ATTR', self.mangle(node.attrname))
else:
print "warning: unexpected flags:", node.flags
print node
......@@ -728,10 +734,10 @@ class CodeGenerator:
if mode == "load":
self.visit(node.expr)
self.emit('DUP_TOP')
self.emit('LOAD_ATTR', node.attrname)
self.emit('LOAD_ATTR', self.mangle(node.attrname))
elif mode == "store":
self.emit('ROT_TWO')
self.emit('STORE_ATTR', node.attrname)
self.emit('STORE_ATTR', self.mangle(node.attrname))
def visitAugSlice(self, node, mode):
if mode == "load":
......@@ -987,6 +993,7 @@ class NestedScopeCodeGenerator(CodeGenerator):
self.__super_visitModule(node)
def _nameOp(self, prefix, name):
name = self.mangle(name)
scope = self.scope.check_name(name)
if scope == SC_LOCAL:
if not self.optimized:
......@@ -1002,7 +1009,8 @@ class NestedScopeCodeGenerator(CodeGenerator):
(name, scope)
def _visitFuncOrLambda(self, node, isLambda=0):
gen = self.FunctionGen(node, self.filename, self.scopes, isLambda)
gen = self.FunctionGen(node, self.filename, self.scopes, isLambda,
self.class_name)
walk(node.code, gen)
gen.finish()
self.set_lineno(node)
......@@ -1079,7 +1087,8 @@ class AbstractFunctionCode:
optimized = 1
lambdaCount = 0
def __init__(self, func, filename, scopes, isLambda):
def __init__(self, func, filename, scopes, isLambda, class_name):
self.class_name = class_name
if isLambda:
klass = FunctionCodeGenerator
name = "<lambda.%d>" % klass.lambdaCount
......@@ -1142,10 +1151,10 @@ class NestedFunctionCodeGenerator(AbstractFunctionCode,
super_init = NestedScopeCodeGenerator.__init__ # call be other init
__super_init = AbstractFunctionCode.__init__
def __init__(self, func, filename, scopes, isLambda):
def __init__(self, func, filename, scopes, isLambda, class_name):
self.scopes = scopes
self.scope = scopes[func]
self.__super_init(func, filename, scopes, isLambda)
self.__super_init(func, filename, scopes, isLambda, class_name)
self.graph.setFreeVars(self.scope.get_free_vars())
self.graph.setCellVars(self.scope.get_cell_vars())
## self.graph.setFlag(CO_NESTED)
......@@ -1153,6 +1162,7 @@ class NestedFunctionCodeGenerator(AbstractFunctionCode,
class AbstractClassCode:
def __init__(self, klass, filename, scopes):
self.class_name = klass.name
self.graph = pyassem.PyFlowGraph(klass.name, filename,
optimized=0)
self.super_init(filename)
......@@ -1163,6 +1173,7 @@ class AbstractClassCode:
self.setDocstring(klass.doc)
def _nameOp(self, prefix, name):
name = self.mangle(name)
# Class namespaces are always unoptimized
self.emit(prefix + '_NAME', name)
......
Lib/compiler/symbols.py
View file @ c59e2200
......@@ -2,8 +2,10 @@
from compiler import ast
from compiler.consts import SC_LOCAL, SC_GLOBAL, SC_FREE, SC_CELL, SC_UNKNOWN
from compiler.misc import mangle
import types
import sys
MANGLE_LEN = 256
......@@ -36,13 +38,7 @@ class Scope:
def mangle(self, name):
if self.klass is None:
return name
if not name.startswith('__'):
return name
if len(name) + 2 >= MANGLE_LEN:
return name
if name.endswith('__'):
return name
return "_%s%s" % (self.klass, name)
return mangle(name, self.klass)
def add_def(self, name):
self.defs[self.mangle(name)] = 1
......
Tools/compiler/compiler/misc.py
View file @ c59e2200
......@@ -39,3 +39,26 @@ class Stack:
self.stack.append(elt)
def top(self):
return self.stack[-1]
MANGLE_LEN = 256 # magic constant from compile.c
def mangle(name, klass):
if not name.startswith('__'):
return name
if len(name) + 2 >= MANGLE_LEN:
return name
if name.endswith('__'):
return name
try:
i = 0
while klass[i] == '_':
i = i + 1
except IndexError:
return name
klass = klass[i:]
tlen = len(klass) + len(name)
if tlen > MANGLE_LEN:
klass = klass[:MANGLE_LEN-tlen]
return "_%s%s" % (klass, name)
Tools/compiler/compiler/pycodegen.py
View file @ c59e2200
......@@ -117,9 +117,6 @@ def is_constant_false(node):
return 1
return 0
def mangle(name):
return name
class CodeGenerator:
"""Defines basic code generator for Python bytecode
......@@ -136,6 +133,7 @@ class CodeGenerator:
optimized = 0 # is namespace access optimized?
__initialized = None
class_name = None # provide default for instance variable
def __init__(self, filename):
if self.__initialized is None:
......@@ -175,6 +173,12 @@ class CodeGenerator:
"""Return a code object"""
return self.graph.getCode()
def mangle(self, name):
if self.class_name is not None:
return misc.mangle(name, self.class_name)
else:
return name
# Next five methods handle name access
def isLocalName(self, name):
......@@ -190,6 +194,7 @@ class CodeGenerator:
self._nameOp('DELETE', name)
def _nameOp(self, prefix, name):
name = self.mangle(name)
if not self.optimized:
self.emit(prefix + '_NAME', name)
return
......@@ -258,7 +263,8 @@ class CodeGenerator:
self._visitFuncOrLambda(node, isLambda=1)
def _visitFuncOrLambda(self, node, isLambda=0):
gen = self.FunctionGen(node, self.filename, self.scopes, isLambda)
gen = self.FunctionGen(node, self.filename, self.scopes, isLambda,
self.class_name)
walk(node.code, gen)
gen.finish()
self.set_lineno(node)
......@@ -645,7 +651,7 @@ class CodeGenerator:
def visitGetattr(self, node):
self.visit(node.expr)
self.emit('LOAD_ATTR', node.attrname)
self.emit('LOAD_ATTR', self.mangle(node.attrname))
# next five implement assignments
......@@ -671,9 +677,9 @@ class CodeGenerator:
def visitAssAttr(self, node):
self.visit(node.expr)
if node.flags == 'OP_ASSIGN':
self.emit('STORE_ATTR', node.attrname)
self.emit('STORE_ATTR', self.mangle(node.attrname))
elif node.flags == 'OP_DELETE':
self.emit('DELETE_ATTR', node.attrname)
self.emit('DELETE_ATTR', self.mangle(node.attrname))
else:
print "warning: unexpected flags:", node.flags
print node
......@@ -728,10 +734,10 @@ class CodeGenerator:
if mode == "load":
self.visit(node.expr)
self.emit('DUP_TOP')
self.emit('LOAD_ATTR', node.attrname)
self.emit('LOAD_ATTR', self.mangle(node.attrname))
elif mode == "store":
self.emit('ROT_TWO')
self.emit('STORE_ATTR', node.attrname)
self.emit('STORE_ATTR', self.mangle(node.attrname))
def visitAugSlice(self, node, mode):
if mode == "load":
......@@ -987,6 +993,7 @@ class NestedScopeCodeGenerator(CodeGenerator):
self.__super_visitModule(node)
def _nameOp(self, prefix, name):
name = self.mangle(name)
scope = self.scope.check_name(name)
if scope == SC_LOCAL:
if not self.optimized:
......@@ -1002,7 +1009,8 @@ class NestedScopeCodeGenerator(CodeGenerator):
(name, scope)
def _visitFuncOrLambda(self, node, isLambda=0):
gen = self.FunctionGen(node, self.filename, self.scopes, isLambda)
gen = self.FunctionGen(node, self.filename, self.scopes, isLambda,
self.class_name)
walk(node.code, gen)
gen.finish()
self.set_lineno(node)
......@@ -1079,7 +1087,8 @@ class AbstractFunctionCode:
optimized = 1
lambdaCount = 0
def __init__(self, func, filename, scopes, isLambda):
def __init__(self, func, filename, scopes, isLambda, class_name):
self.class_name = class_name
if isLambda:
klass = FunctionCodeGenerator
name = "<lambda.%d>" % klass.lambdaCount
......@@ -1142,10 +1151,10 @@ class NestedFunctionCodeGenerator(AbstractFunctionCode,
super_init = NestedScopeCodeGenerator.__init__ # call be other init
__super_init = AbstractFunctionCode.__init__
def __init__(self, func, filename, scopes, isLambda):
def __init__(self, func, filename, scopes, isLambda, class_name):
self.scopes = scopes
self.scope = scopes[func]
self.__super_init(func, filename, scopes, isLambda)
self.__super_init(func, filename, scopes, isLambda, class_name)
self.graph.setFreeVars(self.scope.get_free_vars())
self.graph.setCellVars(self.scope.get_cell_vars())
## self.graph.setFlag(CO_NESTED)
......@@ -1153,6 +1162,7 @@ class NestedFunctionCodeGenerator(AbstractFunctionCode,
class AbstractClassCode:
def __init__(self, klass, filename, scopes):
self.class_name = klass.name
self.graph = pyassem.PyFlowGraph(klass.name, filename,
optimized=0)
self.super_init(filename)
......@@ -1163,6 +1173,7 @@ class AbstractClassCode:
self.setDocstring(klass.doc)
def _nameOp(self, prefix, name):
name = self.mangle(name)
# Class namespaces are always unoptimized
self.emit(prefix + '_NAME', name)
......
Tools/compiler/compiler/symbols.py
View file @ c59e2200
......@@ -2,8 +2,10 @@
from compiler import ast
from compiler.consts import SC_LOCAL, SC_GLOBAL, SC_FREE, SC_CELL, SC_UNKNOWN
from compiler.misc import mangle
import types
import sys
MANGLE_LEN = 256
......@@ -36,13 +38,7 @@ class Scope:
def mangle(self, name):
if self.klass is None:
return name
if not name.startswith('__'):
return name
if len(name) + 2 >= MANGLE_LEN:
return name
if name.endswith('__'):
return name
return "_%s%s" % (self.klass, name)
return mangle(name, self.klass)
def add_def(self, name):
self.defs[self.mangle(name)] = 1
......
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