TermiNexus
c94cdd7174
移除 c.CIf 判断、Addr/Load/Deref/DerefAs/PtrToInt 裸名分支及 _HandleC* 处理函数；c. 前缀退役后不再保留任何处理路径。
176 lines
9.6 KiB
Python
176 lines
9.6 KiB
Python
from __future__ import annotations
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from typing import TYPE_CHECKING
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import vast as ast
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import llvmlite.ir as ir
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if TYPE_CHECKING:
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from lib.core.translator import Translator
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from lib.core.Translator.LlvmGenerator import LlvmGeneratorMixin
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from lib.core.Handles.HandlesBase import BaseHandle
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from lib.core.TypeSystem import CTypeRegistry
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from lib.core.VLogger import get_logger as _vlog
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from lib.constants.config import mode as _config_mode
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class CSpecialCallHandle(BaseHandle):
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def EmitRawCopyLlvm(self, DstPtr: ir.Value, SrcPtr: ir.Value, Gen: LlvmGeneratorMixin,
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NamePrefix: str = "rawcopy") -> bool:
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"""Emit `*dst = *src` as a raw byte copy (Load semantics); False if unusable.
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The width comes from the destination pointee and the source pointer is
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bitcast to it, so this reinterprets memory instead of converting values
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(e.g. `*&bits = *&dbl` must keep the IEEE bits, not fptosi).
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"""
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if not isinstance(DstPtr.type, ir.PointerType) or not isinstance(SrcPtr.type, ir.PointerType):
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return False
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Pointee: ir.Type = DstPtr.type.pointee
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if isinstance(Pointee, ir.VoidType):
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return False
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TargetPtrTy: ir.PointerType = ir.PointerType(Pointee)
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SrcCast: ir.Value = SrcPtr if SrcPtr.type == TargetPtrTy else Gen.builder.bitcast(SrcPtr, TargetPtrTy, name=f"{NamePrefix}_src_cast")
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Loaded: ir.Value | None = Gen._load(SrcCast, name=f"{NamePrefix}_loaded")
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if Loaded is None:
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return False
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DstCast: ir.Value = DstPtr if DstPtr.type == TargetPtrTy else Gen.builder.bitcast(DstPtr, TargetPtrTy, name=f"{NamePrefix}_dst_cast")
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Gen._store(Loaded, DstCast)
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return True
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def _ResolveTAttrToCName(attr: str) -> str | None:
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ctype_cls: type | None = CTypeRegistry.GetClassByName(attr)
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if ctype_cls is not None:
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try:
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inst = ctype_cls()
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cname = type(inst).__name__
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if cname:
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return cname
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except Exception as _e:
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if _config_mode == "strict":
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raise
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_vlog().warning(f"处理函数调用失败: {_e}", "Exception")
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return None
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def _HandleTSpecialCallLlvm(self, Node: ast.Call) -> ir.Value | None:
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Gen: LlvmGeneratorMixin = self.Trans.LlvmGen
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if not Node.args:
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return None
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attr: str = Node.func.attr
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if attr == 'CType':
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return self._HandleCTypeLlvm(Node)
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target_type: str | None = self._ResolveTAttrToCName(attr)
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if target_type is not None:
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IsPtr_cast = False
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if len(Node.args) >= 2:
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second_arg = Node.args[1]
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if isinstance(second_arg, ast.Name) and second_arg.id == 'CPtr':
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IsPtr_cast = True
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if IsPtr_cast:
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return self._HandleTPtrCastLlvm(Node, attr)
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if target_type == 'void':
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target_type = 'void *'
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return self.Trans.ExprCallHandle._HandleTypeCastLlvm(Node.args[0], target_type)
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return None
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def _HandleCTypeLlvm(self, Node: ast.Call) -> ir.Value | None:
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Gen: LlvmGeneratorMixin = self.Trans.LlvmGen
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arg_val: ir.Value | None = self.HandleExprLlvm(Node.args[0])
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if not arg_val:
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return None
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target_type_str: str = 'unsigned long long'
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if len(Node.args) >= 2:
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type_parts: list[str] = []
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ptr_count: int = 0
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for i in range(1, len(Node.args)):
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type_arg = Node.args[i]
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if isinstance(type_arg, ast.Name):
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type_attr = type_arg.id
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_PREFIX_MAP: dict[str, str] = {
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'CUnsigned': 'unsigned', 'CSigned': 'signed',
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'CConst': 'const', 'CVolatile': 'volatile',
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}
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if type_attr in _PREFIX_MAP:
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type_parts.append(_PREFIX_MAP[type_attr])
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elif type_attr in ('CPtr', 'CArrayPtr'):
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ptr_count += 1
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else:
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resolved = self._ResolveTAttrToCName(type_attr)
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if resolved is not None:
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type_parts.append(resolved)
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if type_parts:
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target_type_str = ' '.join(type_parts)
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if ptr_count > 0:
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target_type_str += ' ' + '*' * ptr_count
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if isinstance(arg_val.type, ir.PointerType):
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int_val = Gen.builder.ptrtoint(arg_val, ir.IntType(64), name="ptr_to_int")
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return int_val
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return self.Trans.ExprCallHandle._HandleTypeCastLlvm(Node.args[0], target_type_str)
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def _HandleTPtrCastLlvm(self, Node: ast.Call, attr: str) -> ir.Value | None:
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Gen: LlvmGeneratorMixin = self.Trans.LlvmGen
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if attr in ('CChar', 'CUnsignedChar'):
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first_arg = Node.args[0]
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if isinstance(first_arg, ast.Call) and isinstance(first_arg.func, ast.Name) and first_arg.func.id == 'CInt' and first_arg.args:
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inner_val = self.HandleExprLlvm(first_arg.args[0])
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if isinstance(inner_val.type, ir.PointerType):
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return Gen.builder.bitcast(inner_val, ir.PointerType(ir.IntType(8)), name=f"c{attr.lower()}_ptr_from_cint")
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expr_val = self.HandleExprLlvm(Node.args[0])
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if isinstance(expr_val.type, ir.IntType) and expr_val.type.width == 8:
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var = Gen._alloca(ir.ArrayType(ir.IntType(8), 2), name=f"c{attr.lower()}_ptr")
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zero = ir.Constant(ir.IntType(32), 0)
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char_ptr = Gen.builder.gep(var, [zero, zero], name="char_ptr")
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Gen._store(expr_val, char_ptr)
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null_char = ir.Constant(ir.IntType(8), 0)
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null_ptr = Gen.builder.gep(var, [zero, ir.Constant(ir.IntType(32), 1)], name="null_ptr")
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Gen._store(null_char, null_ptr)
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return char_ptr
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elif isinstance(expr_val.type, ir.PointerType):
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if isinstance(expr_val.type.pointee, ir.PointerType):
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Loaded_ptr = Gen._load(expr_val, name="load_ptr")
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if isinstance(Loaded_ptr.type, ir.PointerType) and isinstance(Loaded_ptr.type.pointee, ir.IntType) and Loaded_ptr.type.pointee.width == 8:
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return Loaded_ptr
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if isinstance(expr_val.type.pointee, ir.IntType) and expr_val.type.pointee.width == 8:
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return expr_val
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return Gen.builder.bitcast(expr_val, ir.PointerType(ir.IntType(8)), name="cast_to_char_ptr")
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elif isinstance(expr_val.type, ir.IntType):
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if expr_val.type.width == 32:
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expr_val = Gen.builder.zext(expr_val, ir.IntType(64), name="zext_to_64")
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return Gen.builder.inttoptr(expr_val, ir.PointerType(ir.IntType(8)), name=f"inttoptr_c{attr.lower()}")
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return Gen.emit_constant(0, 'int')
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elif attr == 'CVoid':
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return self.Trans.ExprCallHandle._HandleTypeCastLlvm(Node.args[0], 'void *')
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elif attr == 'CInt':
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expr_val = self.HandleExprLlvm(Node.args[0])
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if expr_val:
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if isinstance(expr_val.type, ir.IntType):
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if expr_val.type.width < 64:
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expr_val = Gen.builder.zext(expr_val, ir.IntType(64), name="zext_to_64")
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return Gen.builder.inttoptr(expr_val, ir.PointerType(ir.IntType(32)), name="cint_ptr")
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return Gen.builder.bitcast(expr_val, ir.PointerType(ir.IntType(32)), name="cint_ptr")
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else:
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ctype_cls = CTypeRegistry.GetClassByName(attr)
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if ctype_cls is not None:
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llvm_str = CTypeRegistry.CTypeToLLVM(ctype_cls)
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target_type = Gen._type_str_to_llvm(llvm_str)
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if target_type:
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# 基础类型 (int/float) → 加一层指针 → T*
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if isinstance(target_type, (ir.IntType, ir.FloatType, ir.DoubleType)):
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target_ptr_type = ir.PointerType(target_type)
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expr_val = self.HandleExprLlvm(Node.args[0])
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if expr_val:
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if isinstance(expr_val.type, ir.IntType):
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if expr_val.type.width < 64:
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expr_val = Gen.builder.zext(expr_val, ir.IntType(64), name="zext_to_64")
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return Gen.builder.inttoptr(expr_val, target_ptr_type, name=f"{attr.lower()}_ptr")
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return Gen.builder.bitcast(expr_val, target_ptr_type, name=f"{attr.lower()}_ptr")
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# 指针类型 (如 CPtr → i8*) → 再加一层指针 → i8**
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elif isinstance(target_type, ir.PointerType):
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target_ptr_type = ir.PointerType(target_type)
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expr_val = self.HandleExprLlvm(Node.args[0])
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if expr_val:
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if isinstance(expr_val.type, ir.IntType):
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if expr_val.type.width < 64:
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expr_val = Gen.builder.zext(expr_val, ir.IntType(64), name="zext_to_64")
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return Gen.builder.inttoptr(expr_val, target_ptr_type, name=f"{attr.lower()}_ptr")
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return Gen.builder.bitcast(expr_val, target_ptr_type, name=f"{attr.lower()}_ptr")
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return None
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