794 lines
22 KiB
Python
794 lines
22 KiB
Python
import os
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import marshal
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import stat
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import struct
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import types
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from cStringIO import StringIO
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from compiler import ast, parse, walk
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from compiler import pyassem, misc
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from compiler.pyassem import CO_VARARGS, CO_VARKEYWORDS, TupleArg
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def compile(filename):
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f = open(filename)
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buf = f.read()
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f.close()
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mod = Module(buf, filename)
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mod.compile()
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f = open(filename + "c", "wb")
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mod.dump(f)
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f.close()
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class Module:
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def __init__(self, source, filename):
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self.filename = filename
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self.source = source
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self.code = None
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def compile(self):
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ast = parse(self.source)
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root, filename = os.path.split(self.filename)
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gen = ModuleCodeGenerator(filename)
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walk(ast, gen, 1)
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self.code = gen.getCode()
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def dump(self, f):
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f.write(self.getPycHeader())
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marshal.dump(self.code, f)
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MAGIC = (20121 | (ord('\r')<<16) | (ord('\n')<<24))
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def getPycHeader(self):
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# compile.c uses marshal to write a long directly, with
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# calling the interface that would also generate a 1-byte code
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# to indicate the type of the value. simplest way to get the
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# same effect is to call marshal and then skip the code.
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magic = marshal.dumps(self.MAGIC)[1:]
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mtime = os.stat(self.filename)[stat.ST_MTIME]
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mtime = struct.pack('i', mtime)
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return magic + mtime
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class CodeGenerator:
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optimized = 0 # is namespace access optimized?
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def __init__(self, filename):
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## Subclasses must define a constructor that intializes self.graph
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## before calling this init function
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## self.graph = pyassem.PyFlowGraph()
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self.filename = filename
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self.locals = misc.Stack()
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self.loops = misc.Stack()
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self.curStack = 0
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self.maxStack = 0
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self._setupGraphDelegation()
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def _setupGraphDelegation(self):
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self.emit = self.graph.emit
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self.newBlock = self.graph.newBlock
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self.startBlock = self.graph.startBlock
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self.nextBlock = self.graph.nextBlock
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self.setDocstring = self.graph.setDocstring
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def getCode(self):
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"""Return a code object"""
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return self.graph.getCode()
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# Next five methods handle name access
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def isLocalName(self, name):
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return self.locals.top().has_elt(name)
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def storeName(self, name):
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self._nameOp('STORE', name)
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def loadName(self, name):
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self._nameOp('LOAD', name)
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def delName(self, name):
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self._nameOp('DELETE', name)
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def _nameOp(self, prefix, name):
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if not self.optimized:
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self.emit(prefix + '_NAME', name)
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return
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if self.isLocalName(name):
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self.emit(prefix + '_FAST', name)
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else:
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self.emit(prefix + '_GLOBAL', name)
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# The first few visitor methods handle nodes that generator new
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# code objects
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def visitModule(self, node):
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lnf = walk(node.node, LocalNameFinder(), 0)
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self.locals.push(lnf.getLocals())
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self.setDocstring(node.doc)
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self.visit(node.node)
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self.emit('LOAD_CONST', None)
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self.emit('RETURN_VALUE')
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def visitFunction(self, node):
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self._visitFuncOrLambda(node, isLambda=0)
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self.storeName(node.name)
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def visitLambda(self, node):
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self._visitFuncOrLambda(node, isLambda=1)
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## self.storeName("<lambda>")
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def _visitFuncOrLambda(self, node, isLambda):
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gen = FunctionCodeGenerator(node, self.filename, isLambda)
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walk(node.code, gen)
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gen.finish()
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self.emit('SET_LINENO', node.lineno)
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for default in node.defaults:
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self.visit(default)
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self.emit('LOAD_CONST', gen.getCode())
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self.emit('MAKE_FUNCTION', len(node.defaults))
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def visitClass(self, node):
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gen = ClassCodeGenerator(node, self.filename)
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walk(node.code, gen)
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gen.finish()
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self.emit('SET_LINENO', node.lineno)
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self.emit('LOAD_CONST', node.name)
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for base in node.bases:
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self.visit(base)
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self.emit('BUILD_TUPLE', len(node.bases))
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self.emit('LOAD_CONST', gen.getCode())
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self.emit('MAKE_FUNCTION', 0)
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self.emit('CALL_FUNCTION', 0)
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self.emit('BUILD_CLASS')
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self.storeName(node.name)
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# The rest are standard visitor methods
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# The next few implement control-flow statements
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def visitIf(self, node):
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end = self.newBlock()
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numtests = len(node.tests)
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for i in range(numtests):
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test, suite = node.tests[i]
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if hasattr(test, 'lineno'):
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self.emit('SET_LINENO', test.lineno)
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self.visit(test)
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## if i == numtests - 1 and not node.else_:
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## nextTest = end
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## else:
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## nextTest = self.newBlock()
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nextTest = self.newBlock()
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self.emit('JUMP_IF_FALSE', nextTest)
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self.nextBlock()
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self.emit('POP_TOP')
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self.visit(suite)
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self.emit('JUMP_FORWARD', end)
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self.nextBlock(nextTest)
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self.emit('POP_TOP')
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if node.else_:
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self.visit(node.else_)
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self.nextBlock(end)
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def visitWhile(self, node):
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self.emit('SET_LINENO', node.lineno)
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loop = self.newBlock()
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else_ = self.newBlock()
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after = self.newBlock()
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self.emit('SETUP_LOOP', after)
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self.nextBlock(loop)
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self.loops.push(loop)
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self.emit('SET_LINENO', node.lineno)
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self.visit(node.test)
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self.emit('JUMP_IF_FALSE', else_ or after)
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self.nextBlock()
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self.emit('POP_TOP')
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self.visit(node.body)
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self.emit('JUMP_ABSOLUTE', loop)
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self.startBlock(else_) # or just the POPs if not else clause
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self.emit('POP_TOP')
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self.emit('POP_BLOCK')
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if node.else_:
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self.visit(node.else_)
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self.loops.pop()
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self.nextBlock(after)
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def visitFor(self, node):
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start = self.newBlock()
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anchor = self.newBlock()
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after = self.newBlock()
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self.loops.push(start)
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self.emit('SET_LINENO', node.lineno)
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self.emit('SETUP_LOOP', after)
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self.visit(node.list)
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self.visit(ast.Const(0))
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self.nextBlock(start)
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self.emit('SET_LINENO', node.lineno)
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self.emit('FOR_LOOP', anchor)
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self.visit(node.assign)
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self.visit(node.body)
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self.emit('JUMP_ABSOLUTE', start)
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self.nextBlock(anchor)
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self.emit('POP_BLOCK')
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if node.else_:
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self.visit(node.else_)
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self.loops.pop()
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self.nextBlock(after)
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def visitBreak(self, node):
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if not self.loops:
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raise SyntaxError, "'break' outside loop (%s, %d)" % \
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(self.filename, node.lineno)
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self.emit('SET_LINENO', node.lineno)
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self.emit('BREAK_LOOP')
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def visitContinue(self, node):
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if not self.loops:
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raise SyntaxError, "'continue' outside loop (%s, %d)" % \
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(self.filename, node.lineno)
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l = self.loops.top()
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self.emit('SET_LINENO', node.lineno)
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self.emit('JUMP_ABSOLUTE', l)
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self.nextBlock()
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def visitTest(self, node, jump):
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end = self.newBlock()
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for child in node.nodes[:-1]:
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self.visit(child)
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self.emit(jump, end)
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self.nextBlock()
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self.emit('POP_TOP')
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self.visit(node.nodes[-1])
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self.nextBlock(end)
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def visitAnd(self, node):
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self.visitTest(node, 'JUMP_IF_FALSE')
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def visitOr(self, node):
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self.visitTest(node, 'JUMP_IF_TRUE')
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def visitCompare(self, node):
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self.visit(node.expr)
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cleanup = self.newBlock()
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for op, code in node.ops[:-1]:
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self.visit(code)
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self.emit('DUP_TOP')
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self.emit('ROT_THREE')
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self.emit('COMPARE_OP', op)
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self.emit('JUMP_IF_FALSE', cleanup)
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self.nextBlock()
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self.emit('POP_TOP')
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# now do the last comparison
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if node.ops:
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op, code = node.ops[-1]
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self.visit(code)
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self.emit('COMPARE_OP', op)
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if len(node.ops) > 1:
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end = self.newBlock()
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self.emit('JUMP_FORWARD', end)
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self.nextBlock(cleanup)
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self.emit('ROT_TWO')
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self.emit('POP_TOP')
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self.nextBlock(end)
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# exception related
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def visitAssert(self, node):
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# XXX would be interesting to implement this via a
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# transformation of the AST before this stage
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end = self.newBlock()
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self.emit('SET_LINENO', node.lineno)
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# XXX __debug__ and AssertionError appear to be special cases
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# -- they are always loaded as globals even if there are local
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# names. I guess this is a sort of renaming op.
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self.emit('LOAD_GLOBAL', '__debug__')
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self.emit('JUMP_IF_FALSE', end)
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self.nextBlock()
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self.emit('POP_TOP')
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self.visit(node.test)
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self.emit('JUMP_IF_TRUE', end)
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self.nextBlock()
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self.emit('LOAD_GLOBAL', 'AssertionError')
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self.visit(node.fail)
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self.emit('RAISE_VARARGS', 2)
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self.nextBlock(end)
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self.emit('POP_TOP')
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def visitRaise(self, node):
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self.emit('SET_LINENO', node.lineno)
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n = 0
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if node.expr1:
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self.visit(node.expr1)
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n = n + 1
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if node.expr2:
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self.visit(node.expr2)
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n = n + 1
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if node.expr3:
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self.visit(node.expr3)
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n = n + 1
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self.emit('RAISE_VARARGS', n)
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def visitTryExcept(self, node):
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handlers = self.newBlock()
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end = self.newBlock()
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if node.else_:
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lElse = self.newBlock()
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else:
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lElse = end
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self.emit('SET_LINENO', node.lineno)
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self.emit('SETUP_EXCEPT', handlers)
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self.visit(node.body)
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self.emit('POP_BLOCK')
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self.emit('JUMP_FORWARD', lElse)
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self.nextBlock(handlers)
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last = len(node.handlers) - 1
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for i in range(len(node.handlers)):
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expr, target, body = node.handlers[i]
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if hasattr(expr, 'lineno'):
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self.emit('SET_LINENO', expr.lineno)
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if expr:
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self.emit('DUP_TOP')
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self.visit(expr)
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self.emit('COMPARE_OP', 'exception match')
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next = self.newBlock()
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self.emit('JUMP_IF_FALSE', next)
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self.nextBlock()
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self.emit('POP_TOP')
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self.emit('POP_TOP')
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if target:
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self.visit(target)
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else:
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self.emit('POP_TOP')
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self.emit('POP_TOP')
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self.visit(body)
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self.emit('JUMP_FORWARD', end)
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if expr:
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self.nextBlock(next)
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self.emit('POP_TOP')
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self.emit('END_FINALLY')
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if node.else_:
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self.nextBlock(lElse)
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self.visit(node.else_)
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self.nextBlock(end)
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def visitTryFinally(self, node):
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final = self.newBlock()
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self.emit('SET_LINENO', node.lineno)
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self.emit('SETUP_FINALLY', final)
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self.visit(node.body)
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self.emit('POP_BLOCK')
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self.emit('LOAD_CONST', None)
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self.nextBlock(final)
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self.visit(node.final)
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self.emit('END_FINALLY')
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# misc
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## def visitStmt(self, node):
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## # nothing to do except walk the children
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## pass
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def visitDiscard(self, node):
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self.visit(node.expr)
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self.emit('POP_TOP')
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def visitConst(self, node):
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self.emit('LOAD_CONST', node.value)
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def visitKeyword(self, node):
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self.emit('LOAD_CONST', node.name)
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self.visit(node.expr)
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def visitGlobal(self, node):
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# no code to generate
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pass
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def visitName(self, node):
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self.loadName(node.name)
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def visitPass(self, node):
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self.emit('SET_LINENO', node.lineno)
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def visitImport(self, node):
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self.emit('SET_LINENO', node.lineno)
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for name in node.names:
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self.emit('IMPORT_NAME', name)
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self.storeName(name)
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def visitFrom(self, node):
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self.emit('SET_LINENO', node.lineno)
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self.emit('IMPORT_NAME', node.modname)
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for name in node.names:
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if name == '*':
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self.namespace = 0
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self.emit('IMPORT_FROM', name)
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self.emit('POP_TOP')
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def visitGetattr(self, node):
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self.visit(node.expr)
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self.emit('LOAD_ATTR', node.attrname)
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# next five implement assignments
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def visitAssign(self, node):
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self.emit('SET_LINENO', node.lineno)
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self.visit(node.expr)
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dups = len(node.nodes) - 1
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for i in range(len(node.nodes)):
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elt = node.nodes[i]
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if i < dups:
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self.emit('DUP_TOP')
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if isinstance(elt, ast.Node):
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self.visit(elt)
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def visitAssName(self, node):
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if node.flags == 'OP_ASSIGN':
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self.storeName(node.name)
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elif node.flags == 'OP_DELETE':
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self.delName(node.name)
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else:
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print "oops", node.flags
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def visitAssAttr(self, node):
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self.visit(node.expr)
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if node.flags == 'OP_ASSIGN':
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self.emit('STORE_ATTR', node.attrname)
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elif node.flags == 'OP_DELETE':
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self.emit('DELETE_ATTR', node.attrname)
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else:
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print "warning: unexpected flags:", node.flags
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print node
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def visitAssTuple(self, node):
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if findOp(node) != 'OP_DELETE':
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self.emit('UNPACK_TUPLE', len(node.nodes))
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for child in node.nodes:
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self.visit(child)
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visitAssList = visitAssTuple
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def visitExec(self, node):
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self.visit(node.expr)
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if node.locals is None:
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self.emit('LOAD_CONST', None)
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else:
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self.visit(node.locals)
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if node.globals is None:
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self.emit('DUP_TOP')
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else:
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self.visit(node.globals)
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self.emit('EXEC_STMT')
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def visitCallFunc(self, node):
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pos = 0
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kw = 0
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if hasattr(node, 'lineno'):
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self.emit('SET_LINENO', node.lineno)
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self.visit(node.node)
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for arg in node.args:
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self.visit(arg)
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if isinstance(arg, ast.Keyword):
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kw = kw + 1
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else:
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pos = pos + 1
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self.emit('CALL_FUNCTION', kw << 8 | pos)
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def visitPrint(self, node):
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self.emit('SET_LINENO', node.lineno)
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for child in node.nodes:
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self.visit(child)
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self.emit('PRINT_ITEM')
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def visitPrintnl(self, node):
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self.visitPrint(node)
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self.emit('PRINT_NEWLINE')
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def visitReturn(self, node):
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self.emit('SET_LINENO', node.lineno)
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self.visit(node.value)
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self.emit('RETURN_VALUE')
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# slice and subscript stuff
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def visitSlice(self, node):
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self.visit(node.expr)
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slice = 0
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if node.lower:
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self.visit(node.lower)
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slice = slice | 1
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if node.upper:
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self.visit(node.upper)
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slice = slice | 2
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if node.flags == 'OP_APPLY':
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self.emit('SLICE+%d' % slice)
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elif node.flags == 'OP_ASSIGN':
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self.emit('STORE_SLICE+%d' % slice)
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elif node.flags == 'OP_DELETE':
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self.emit('DELETE_SLICE+%d' % slice)
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else:
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print "weird slice", node.flags
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raise
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def visitSubscript(self, node):
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self.visit(node.expr)
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for sub in node.subs:
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self.visit(sub)
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if len(node.subs) > 1:
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self.emit('BUILD_TUPLE', len(node.subs))
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if node.flags == 'OP_APPLY':
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self.emit('BINARY_SUBSCR')
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elif node.flags == 'OP_ASSIGN':
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self.emit('STORE_SUBSCR')
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elif node.flags == 'OP_DELETE':
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self.emit('DELETE_SUBSCR')
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# binary ops
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def binaryOp(self, node, op):
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|
self.visit(node.left)
|
|
self.visit(node.right)
|
|
self.emit(op)
|
|
|
|
def visitAdd(self, node):
|
|
return self.binaryOp(node, 'BINARY_ADD')
|
|
|
|
def visitSub(self, node):
|
|
return self.binaryOp(node, 'BINARY_SUBTRACT')
|
|
|
|
def visitMul(self, node):
|
|
return self.binaryOp(node, 'BINARY_MULTIPLY')
|
|
|
|
def visitDiv(self, node):
|
|
return self.binaryOp(node, 'BINARY_DIVIDE')
|
|
|
|
def visitMod(self, node):
|
|
return self.binaryOp(node, 'BINARY_MODULO')
|
|
|
|
def visitPower(self, node):
|
|
return self.binaryOp(node, 'BINARY_POWER')
|
|
|
|
def visitLeftShift(self, node):
|
|
return self.binaryOp(node, 'BINARY_LSHIFT')
|
|
|
|
def visitRightShift(self, node):
|
|
return self.binaryOp(node, 'BINARY_RSHIFT')
|
|
|
|
# unary ops
|
|
|
|
def unaryOp(self, node, op):
|
|
self.visit(node.expr)
|
|
self.emit(op)
|
|
|
|
def visitInvert(self, node):
|
|
return self.unaryOp(node, 'UNARY_INVERT')
|
|
|
|
def visitUnarySub(self, node):
|
|
return self.unaryOp(node, 'UNARY_NEGATIVE')
|
|
|
|
def visitUnaryAdd(self, node):
|
|
return self.unaryOp(node, 'UNARY_POSITIVE')
|
|
|
|
def visitUnaryInvert(self, node):
|
|
return self.unaryOp(node, 'UNARY_INVERT')
|
|
|
|
def visitNot(self, node):
|
|
return self.unaryOp(node, 'UNARY_NOT')
|
|
|
|
def visitBackquote(self, node):
|
|
return self.unaryOp(node, 'UNARY_CONVERT')
|
|
|
|
# bit ops
|
|
|
|
def bitOp(self, nodes, op):
|
|
self.visit(nodes[0])
|
|
for node in nodes[1:]:
|
|
self.visit(node)
|
|
self.emit(op)
|
|
|
|
def visitBitand(self, node):
|
|
return self.bitOp(node.nodes, 'BINARY_AND')
|
|
|
|
def visitBitor(self, node):
|
|
return self.bitOp(node.nodes, 'BINARY_OR')
|
|
|
|
def visitBitxor(self, node):
|
|
return self.bitOp(node.nodes, 'BINARY_XOR')
|
|
|
|
# object constructors
|
|
|
|
def visitEllipsis(self, node):
|
|
self.emit('LOAD_CONST', Ellipsis)
|
|
|
|
def visitTuple(self, node):
|
|
for elt in node.nodes:
|
|
self.visit(elt)
|
|
self.emit('BUILD_TUPLE', len(node.nodes))
|
|
|
|
def visitList(self, node):
|
|
for elt in node.nodes:
|
|
self.visit(elt)
|
|
self.emit('BUILD_LIST', len(node.nodes))
|
|
|
|
def visitSliceobj(self, node):
|
|
for child in node.nodes:
|
|
self.visit(child)
|
|
self.emit('BUILD_SLICE', len(node.nodes))
|
|
|
|
def visitDict(self, node):
|
|
# XXX is this a good general strategy? could it be done
|
|
# separately from the general visitor
|
|
lineno = getattr(node, 'lineno', None)
|
|
if lineno:
|
|
self.emit('SET_LINENO', lineno)
|
|
self.emit('BUILD_MAP', 0)
|
|
for k, v in node.items:
|
|
lineno2 = getattr(node, 'lineno', None)
|
|
if lineno != lineno2:
|
|
self.emit('SET_LINENO', lineno2)
|
|
lineno = lineno2
|
|
self.emit('DUP_TOP')
|
|
self.visit(v)
|
|
self.emit('ROT_TWO')
|
|
self.visit(k)
|
|
self.emit('STORE_SUBSCR')
|
|
|
|
class ModuleCodeGenerator(CodeGenerator):
|
|
super_init = CodeGenerator.__init__
|
|
|
|
def __init__(self, filename):
|
|
# XXX <module> is ? in compile.c
|
|
self.graph = pyassem.PyFlowGraph("<module>", filename)
|
|
self.super_init(filename)
|
|
|
|
class FunctionCodeGenerator(CodeGenerator):
|
|
super_init = CodeGenerator.__init__
|
|
|
|
optimized = 1
|
|
lambdaCount = 0
|
|
|
|
def __init__(self, func, filename, isLambda=0):
|
|
if isLambda:
|
|
klass = FunctionCodeGenerator
|
|
name = "<lambda.%d>" % klass.lambdaCount
|
|
klass.lambdaCount = klass.lambdaCount + 1
|
|
else:
|
|
name = func.name
|
|
args, hasTupleArg = generateArgList(func.argnames)
|
|
self.graph = pyassem.PyFlowGraph(name, filename, args,
|
|
optimized=1)
|
|
self.isLambda = isLambda
|
|
self.super_init(filename)
|
|
|
|
lnf = walk(func.code, LocalNameFinder(args), 0)
|
|
self.locals.push(lnf.getLocals())
|
|
if func.varargs:
|
|
self.graph.setFlag(CO_VARARGS)
|
|
if func.kwargs:
|
|
self.graph.setFlag(CO_VARKEYWORDS)
|
|
self.emit('SET_LINENO', func.lineno)
|
|
if hasTupleArg:
|
|
self.generateArgUnpack(func.argnames)
|
|
|
|
def finish(self):
|
|
self.graph.startExitBlock()
|
|
if not self.isLambda:
|
|
self.emit('LOAD_CONST', None)
|
|
self.emit('RETURN_VALUE')
|
|
|
|
def generateArgUnpack(self, args):
|
|
count = 0
|
|
for arg in args:
|
|
if type(arg) == types.TupleType:
|
|
self.emit('LOAD_FAST', '.nested%d' % count)
|
|
count = count + 1
|
|
self.unpackTuple(arg)
|
|
|
|
def unpackTuple(self, tup):
|
|
self.emit('UNPACK_TUPLE', len(tup))
|
|
for elt in tup:
|
|
if type(elt) == types.TupleType:
|
|
self.unpackTuple(elt)
|
|
else:
|
|
self.emit('STORE_FAST', elt)
|
|
|
|
class ClassCodeGenerator(CodeGenerator):
|
|
super_init = CodeGenerator.__init__
|
|
|
|
def __init__(self, klass, filename):
|
|
self.graph = pyassem.PyFlowGraph(klass.name, filename,
|
|
optimized=0)
|
|
self.super_init(filename)
|
|
lnf = walk(klass.code, LocalNameFinder(), 0)
|
|
self.locals.push(lnf.getLocals())
|
|
|
|
def finish(self):
|
|
self.graph.startExitBlock()
|
|
self.emit('LOAD_LOCALS')
|
|
self.emit('RETURN_VALUE')
|
|
|
|
|
|
def generateArgList(arglist):
|
|
"""Generate an arg list marking TupleArgs"""
|
|
args = []
|
|
extra = []
|
|
count = 0
|
|
for elt in arglist:
|
|
if type(elt) == types.StringType:
|
|
args.append(elt)
|
|
elif type(elt) == types.TupleType:
|
|
args.append(TupleArg(count, elt))
|
|
count = count + 1
|
|
extra.extend(misc.flatten(elt))
|
|
else:
|
|
raise ValueError, "unexpect argument type:", elt
|
|
return args + extra, count
|
|
|
|
class LocalNameFinder:
|
|
"""Find local names in scope"""
|
|
def __init__(self, names=()):
|
|
self.names = misc.Set()
|
|
self.globals = misc.Set()
|
|
for name in names:
|
|
self.names.add(name)
|
|
|
|
def getLocals(self):
|
|
for elt in self.globals.elements():
|
|
if self.names.has_elt(elt):
|
|
self.names.remove(elt)
|
|
return self.names
|
|
|
|
def visitDict(self, node):
|
|
pass
|
|
|
|
def visitGlobal(self, node):
|
|
for name in node.names:
|
|
self.globals.add(name)
|
|
|
|
def visitFunction(self, node):
|
|
self.names.add(node.name)
|
|
|
|
def visitLambda(self, node):
|
|
pass
|
|
|
|
def visitImport(self, node):
|
|
for name in node.names:
|
|
self.names.add(name)
|
|
|
|
def visitFrom(self, node):
|
|
for name in node.names:
|
|
self.names.add(name)
|
|
|
|
def visitClass(self, node):
|
|
self.names.add(node.name)
|
|
|
|
def visitAssName(self, node):
|
|
self.names.add(node.name)
|
|
|
|
def findOp(node):
|
|
"""Find the op (DELETE, LOAD, STORE) in an AssTuple tree"""
|
|
v = OpFinder()
|
|
walk(node, v, 0)
|
|
return v.op
|
|
|
|
class OpFinder:
|
|
def __init__(self):
|
|
self.op = None
|
|
def visitAssName(self, node):
|
|
if self.op is None:
|
|
self.op = node.flags
|
|
elif self.op != node.flags:
|
|
raise ValueError, "mixed ops in stmt"
|
|
|
|
if __name__ == "__main__":
|
|
import sys
|
|
|
|
for file in sys.argv[1:]:
|
|
compile(file)
|