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 "llvm/Demangle/StringViewExtras.h" 15 #include <cstdlib> 16 #include <string_view> 17 18 using llvm::itanium_demangle::starts_with; 19 20 std::string llvm::demangle(std::string_view MangledName) { 21 std::string Result; 22 23 if (nonMicrosoftDemangle(MangledName, Result)) 24 return Result; 25 26 if (starts_with(MangledName, '_') && 27 nonMicrosoftDemangle(MangledName.substr(1), Result)) 28 return Result; 29 30 if (char *Demangled = microsoftDemangle(MangledName, nullptr, nullptr)) { 31 Result = Demangled; 32 std::free(Demangled); 33 } else { 34 Result = MangledName; 35 } 36 return Result; 37 } 38 39 static bool isItaniumEncoding(std::string_view S) { 40 // Itanium encoding requires 1 or 3 leading underscores, followed by 'Z'. 41 return starts_with(S, "_Z") || starts_with(S, "___Z"); 42 } 43 44 static bool isRustEncoding(std::string_view S) { return starts_with(S, "_R"); } 45 46 static bool isDLangEncoding(std::string_view S) { return starts_with(S, "_D"); } 47 48 bool llvm::nonMicrosoftDemangle(std::string_view MangledName, 49 std::string &Result) { 50 char *Demangled = nullptr; 51 if (isItaniumEncoding(MangledName)) 52 Demangled = itaniumDemangle(MangledName); 53 else if (isRustEncoding(MangledName)) 54 Demangled = rustDemangle(MangledName); 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