| //===-- Demangle.cpp - Common demangling functions ------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| /// |
| /// \file This file contains definitions of common demangling functions. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Demangle/Demangle.h" |
| #include <cstdlib> |
| #include <cstring> |
| |
| static bool isItaniumEncoding(const char *S) { |
| // Itanium encoding requires 1 or 3 leading underscores, followed by 'Z'. |
| return std::strncmp(S, "_Z", 2) == 0 || std::strncmp(S, "___Z", 4) == 0; |
| } |
| |
| static bool isRustEncoding(const char *S) { return S[0] == '_' && S[1] == 'R'; } |
| |
| static bool isDLangEncoding(const std::string &MangledName) { |
| return MangledName.size() >= 2 && MangledName[0] == '_' && |
| MangledName[1] == 'D'; |
| } |
| |
| std::string llvm::demangle(const std::string &MangledName) { |
| std::string Result; |
| const char *S = MangledName.c_str(); |
| |
| if (nonMicrosoftDemangle(S, Result)) |
| return Result; |
| |
| if (S[0] == '_' && nonMicrosoftDemangle(S + 1, Result)) |
| return Result; |
| |
| if (char *Demangled = |
| microsoftDemangle(S, nullptr, nullptr, nullptr, nullptr)) { |
| Result = Demangled; |
| std::free(Demangled); |
| return Result; |
| } |
| |
| return MangledName; |
| } |
| |
| bool llvm::nonMicrosoftDemangle(const char *MangledName, std::string &Result) { |
| char *Demangled = nullptr; |
| if (isItaniumEncoding(MangledName)) |
| Demangled = itaniumDemangle(MangledName, nullptr, nullptr, nullptr); |
| else if (isRustEncoding(MangledName)) |
| Demangled = rustDemangle(MangledName, nullptr, nullptr, nullptr); |
| else if (isDLangEncoding(MangledName)) |
| Demangled = dlangDemangle(MangledName); |
| |
| if (!Demangled) |
| return false; |
| |
| Result = Demangled; |
| std::free(Demangled); |
| return true; |
| } |