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 #include <cstring> 16 17 static bool isItaniumEncoding(const char *S) { 18 // Itanium encoding requires 1 or 3 leading underscores, followed by 'Z'. 19 return std::strncmp(S, "_Z", 2) == 0 || std::strncmp(S, "___Z", 4) == 0; 20 } 21 22 static bool isRustEncoding(const char *S) { return S[0] == '_' && S[1] == 'R'; } 23 24 static bool isDLangEncoding(const std::string &MangledName) { 25 return MangledName.size() >= 2 && MangledName[0] == '_' && 26 MangledName[1] == 'D'; 27 } 28 29 std::string llvm::demangle(const std::string &MangledName) { 30 std::string Result; 31 const char *S = MangledName.c_str(); 32 33 if (nonMicrosoftDemangle(S, Result)) 34 return Result; 35 36 if (S[0] == '_' && nonMicrosoftDemangle(S + 1, Result)) 37 return Result; 38 39 if (char *Demangled = 40 microsoftDemangle(S, nullptr, nullptr, nullptr, nullptr)) { 41 Result = Demangled; 42 std::free(Demangled); 43 return Result; 44 } 45 46 return MangledName; 47 } 48 49 bool llvm::nonMicrosoftDemangle(const char *MangledName, std::string &Result) { 50 char *Demangled = nullptr; 51 if (isItaniumEncoding(MangledName)) 52 Demangled = itaniumDemangle(MangledName, nullptr, nullptr, nullptr); 53 else if (isRustEncoding(MangledName)) 54 Demangled = rustDemangle(MangledName, nullptr, nullptr, nullptr); 55 else if (isDLangEncoding(MangledName)) 56 Demangled = dlangDemangle(MangledName); 57 58 if (!Demangled) 59 return false; 60 61 Result = Demangled; 62 std::free(Demangled); 63 return true; 64 } 65