1 //===-- Demangle.cpp - Common demangling functions ------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 /// 9 /// \file This file contains definitions of common demangling functions. 10 /// 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm/Demangle/Demangle.h" 14 #include <cstdlib> 15 16 static bool isItaniumEncoding(const std::string &MangledName) { 17 size_t Pos = MangledName.find_first_not_of('_'); 18 // A valid Itanium encoding requires 1-4 leading underscores, followed by 'Z'. 19 return Pos > 0 && Pos <= 4 && MangledName[Pos] == 'Z'; 20 } 21 22 static bool isRustEncoding(const std::string &MangledName) { 23 return MangledName.size() >= 2 && MangledName[0] == '_' && 24 MangledName[1] == 'R'; 25 } 26 27 std::string llvm::demangle(const std::string &MangledName) { 28 char *Demangled; 29 if (isItaniumEncoding(MangledName)) 30 Demangled = itaniumDemangle(MangledName.c_str(), nullptr, nullptr, nullptr); 31 else if (isRustEncoding(MangledName)) 32 Demangled = rustDemangle(MangledName.c_str(), nullptr, nullptr, nullptr); 33 else 34 Demangled = microsoftDemangle(MangledName.c_str(), nullptr, nullptr, 35 nullptr, nullptr); 36 37 if (!Demangled) 38 return MangledName; 39 40 std::string Ret = Demangled; 41 std::free(Demangled); 42 return Ret; 43 } 44