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#
# Copyright (c) 2008-10, Mahadevan R All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# * Neither the name of this software, nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
"""Execution Engine and related classes.
"""
import llvm # top-level, for common stuff
import llvm.core as core # module, function etc.
import llvm._core as _core # C wrappers
import llvm._util as _util # utility functions
#===----------------------------------------------------------------------===
# Enumerations
#===----------------------------------------------------------------------===
BO_BIG_ENDIAN = 0
BO_LITTLE_ENDIAN = 1
#===----------------------------------------------------------------------===
# Target data
#===----------------------------------------------------------------------===
class TargetData(llvm.Ownable):
@staticmethod
def new(strrep):
return TargetData(_core.LLVMCreateTargetData(strrep))
def __init__(self, ptr):
llvm.Ownable.__init__(self, ptr, _core.LLVMDisposeTargetData)
def __str__(self):
return _core.LLVMTargetDataAsString(self.ptr)
@property
def byte_order(self):
return _core.LLVMByteOrder(self.ptr)
@property
def pointer_size(self):
return _core.LLVMPointerSize(self.ptr)
@property
def target_integer_type(self):
ptr = _core.LLVMIntPtrType(self.ptr);
return core.IntegerType(ptr, core.TYPE_INTEGER)
def size(self, ty):
core.check_is_type(ty)
return _core.LLVMSizeOfTypeInBits(self.ptr, ty.ptr)
def store_size(self, ty):
core.check_is_type(ty)
return _core.LLVMStoreSizeOfType(self.ptr, ty.ptr)
def abi_size(self, ty):
core.check_is_type(ty)
return _core.LLVMABISizeOfType(self.ptr, ty.ptr)
def abi_alignment(self, ty):
core.check_is_type(ty)
return _core.LLVMABIAlignmentOfType(self.ptr, ty.ptr)
def callframe_alignment(self, ty):
core.check_is_type(ty)
return _core.LLVMCallFrameAlignmentOfType(self.ptr, ty.ptr)
def preferred_alignment(self, ty_or_gv):
if isinstance(ty_or_gv, core.Type):
return _core.LLVMPreferredAlignmentOfType(self.ptr,
ty_or_gv.ptr)
elif isinstance(ty_or_gv, core.GlobalVariable):
return _core.LLVMPreferredAlignmentOfGlobal(self.ptr,
ty_or_gv.ptr)
else:
raise core.LLVMException, \
"argument is neither a type nor a global variable"
def element_at_offset(self, ty, ofs):
core.check_is_type_struct(ty)
ofs = long(ofs) # ofs is unsigned long long
return _core.LLVMElementAtOffset(self.ptr, ty.ptr, ofs)
def offset_of_element(self, ty, el):
core.check_is_type_struct(ty)
el = int(el) # el should be an int
return _core.LLVMOffsetOfElement(self.ptr, ty.ptr, el)
#===----------------------------------------------------------------------===
# Generic value
#===----------------------------------------------------------------------===
class GenericValue(object):
@staticmethod
def int(ty, intval):
core.check_is_type(ty)
ptr = _core.LLVMCreateGenericValueOfInt(ty.ptr, intval, 0)
return GenericValue(ptr)
@staticmethod
def int_signed(ty, intval):
core.check_is_type(ty)
ptr = _core.LLVMCreateGenericValueOfInt(ty.ptr, intval, 1)
return GenericValue(ptr)
@staticmethod
def real(ty, floatval):
core.check_is_type(ty) # only float or double
ptr = _core.LLVMCreateGenericValueOfFloat(ty.ptr, floatval)
return GenericValue(ptr)
@staticmethod
def pointer(ty, intval):
core.check_is_type(ty)
ptr = _core.LLVMCreateGenericValueOfPointer(ty.ptr, intval)
return GenericValue(ptr)
def __init__(self, ptr):
self.ptr = ptr
def __del__(self):
_core.LLVMDisposeGenericValue(self.ptr)
def as_int(self):
return _core.LLVMGenericValueToInt(self.ptr, 0)
def as_int_signed(self):
return _core.LLVMGenericValueToInt(self.ptr, 1)
def as_real(self, ty):
core.check_is_type(ty) # only float or double
return _core.LLVMGenericValueToFloat(ty.ptr, self.ptr)
def as_pointer(self):
return _core.LLVMGenericValueToPointer(self.ptr)
# helper functions for generic value objects
def check_is_generic_value(obj): _util.check_gen(obj, GenericValue)
def _unpack_generic_values(objlist):
return _util.unpack_gen(objlist, check_is_generic_value)
#===----------------------------------------------------------------------===
# Execution engine
#===----------------------------------------------------------------------===
class ExecutionEngine(object):
@staticmethod
def new(module, force_interpreter=False):
core.check_is_module(module)
_util.check_is_unowned(module)
ret = _core.LLVMCreateExecutionEngine(module.ptr, int(force_interpreter))
if isinstance(ret, str):
raise llvm.LLVMException, ret
return ExecutionEngine(ret, module)
def __init__(self, ptr, module):
self.ptr = ptr
module._own(self)
def __del__(self):
_core.LLVMDisposeExecutionEngine(self.ptr)
def run_function(self, fn, args):
core.check_is_function(fn)
ptrs = _unpack_generic_values(args)
gvptr = _core.LLVMRunFunction2(self.ptr, fn.ptr, ptrs)
return GenericValue(gvptr)
def get_pointer_to_function(self, fn):
core.check_is_function(fn)
return _core.LLVMGetPointerToFunction(self.ptr,fn.ptr)
def run_static_ctors(self):
_core.LLVMRunStaticConstructors(self.ptr)
def run_static_dtors(self):
_core.LLVMRunStaticDestructors(self.ptr)
def free_machine_code_for(self, fn):
core.check_is_function(fn)
_core.LLVMFreeMachineCodeForFunction(self.ptr, fn.ptr)
def add_module(self, module):
core.check_is_module(module)
_core.LLVMAddModule(self.ptr, module.ptr)
module._own(self)
def remove_module(self, module):
core.check_is_module(module)
if module.owner != self:
raise llvm.LLVMException, "module is not owned by self"
ret = _core.LLVMRemoveModule2(self.ptr, module.ptr)
if isinstance(ret, str):
raise llvm.LLVMException, ret
return core.Module(ret)
@property
def target_data(self):
td = TargetData(_core.LLVMGetExecutionEngineTargetData(self.ptr))
td._own(self)
return td
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