| //===-- llvm-c++filt.cpp --------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/ADT/StringExtras.h" |
| #include "llvm/Demangle/Demangle.h" |
| #include "llvm/Support/CommandLine.h" |
| #include "llvm/Support/InitLLVM.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include <cstdlib> |
| #include <iostream> |
| |
| using namespace llvm; |
| |
| enum Style { |
| Auto, ///< auto-detect mangling |
| GNU, ///< GNU |
| Lucid, ///< Lucid compiler (lcc) |
| ARM, |
| HP, ///< HP compiler (xCC) |
| EDG, ///< EDG compiler |
| GNUv3, ///< GNU C++ v3 ABI |
| Java, ///< Java (gcj) |
| GNAT ///< ADA compiler (gnat) |
| }; |
| static cl::opt<Style> |
| Format("format", cl::desc("decoration style"), |
| cl::values(clEnumValN(Auto, "auto", "auto-detect style"), |
| clEnumValN(GNU, "gnu", "GNU (itanium) style")), |
| cl::init(Auto)); |
| static cl::alias FormatShort("s", cl::desc("alias for --format"), |
| cl::aliasopt(Format)); |
| |
| static cl::opt<bool> StripUnderscore("strip-underscore", |
| cl::desc("strip the leading underscore"), |
| cl::init(false)); |
| static cl::alias StripUnderscoreShort("_", |
| cl::desc("alias for --strip-underscore"), |
| cl::aliasopt(StripUnderscore)); |
| |
| static cl::opt<bool> |
| Types("types", |
| cl::desc("attempt to demangle types as well as function names"), |
| cl::init(false)); |
| static cl::alias TypesShort("t", cl::desc("alias for --types"), |
| cl::aliasopt(Types)); |
| |
| static cl::list<std::string> |
| Decorated(cl::Positional, cl::desc("<mangled>"), cl::ZeroOrMore); |
| |
| static std::string demangle(llvm::raw_ostream &OS, const std::string &Mangled) { |
| int Status; |
| |
| const char *Decorated = Mangled.c_str(); |
| if (StripUnderscore) |
| if (Decorated[0] == '_') |
| ++Decorated; |
| size_t DecoratedLength = strlen(Decorated); |
| |
| char *Undecorated = nullptr; |
| |
| if (Types || ((DecoratedLength >= 2 && strncmp(Decorated, "_Z", 2) == 0) || |
| (DecoratedLength >= 4 && strncmp(Decorated, "___Z", 4) == 0))) |
| Undecorated = itaniumDemangle(Decorated, nullptr, nullptr, &Status); |
| |
| if (!Undecorated && |
| (DecoratedLength > 6 && strncmp(Decorated, "__imp_", 6) == 0)) { |
| OS << "import thunk for "; |
| Undecorated = itaniumDemangle(Decorated + 6, nullptr, nullptr, &Status); |
| } |
| |
| std::string Result(Undecorated ? Undecorated : Mangled); |
| free(Undecorated); |
| return Result; |
| } |
| |
| // Split 'Source' on any character that fails to pass 'IsLegalChar'. The |
| // returned vector consists of pairs where 'first' is the delimited word, and |
| // 'second' are the delimiters following that word. |
| static void SplitStringDelims( |
| StringRef Source, |
| SmallVectorImpl<std::pair<StringRef, StringRef>> &OutFragments, |
| function_ref<bool(char)> IsLegalChar) { |
| // The beginning of the input string. |
| const auto Head = Source.begin(); |
| |
| // Obtain any leading delimiters. |
| auto Start = std::find_if(Head, Source.end(), IsLegalChar); |
| if (Start != Head) |
| OutFragments.push_back({"", Source.slice(0, Start - Head)}); |
| |
| // Capture each word and the delimiters following that word. |
| while (Start != Source.end()) { |
| Start = std::find_if(Start, Source.end(), IsLegalChar); |
| auto End = std::find_if_not(Start, Source.end(), IsLegalChar); |
| auto DEnd = std::find_if(End, Source.end(), IsLegalChar); |
| OutFragments.push_back({Source.slice(Start - Head, End - Head), |
| Source.slice(End - Head, DEnd - Head)}); |
| Start = DEnd; |
| } |
| } |
| |
| // This returns true if 'C' is a character that can show up in an |
| // Itanium-mangled string. |
| static bool IsLegalItaniumChar(char C) { |
| // Itanium CXX ABI [External Names]p5.1.1: |
| // '$' and '.' in mangled names are reserved for private implementations. |
| return isalnum(C) || C == '.' || C == '$' || C == '_'; |
| } |
| |
| // If 'Split' is true, then 'Mangled' is broken into individual words and each |
| // word is demangled. Otherwise, the entire string is treated as a single |
| // mangled item. The result is output to 'OS'. |
| static void demangleLine(llvm::raw_ostream &OS, StringRef Mangled, bool Split) { |
| std::string Result; |
| if (Split) { |
| SmallVector<std::pair<StringRef, StringRef>, 16> Words; |
| SplitStringDelims(Mangled, Words, IsLegalItaniumChar); |
| for (const auto &Word : Words) |
| Result += demangle(OS, Word.first) + Word.second.str(); |
| } else |
| Result = demangle(OS, Mangled); |
| OS << Result << '\n'; |
| OS.flush(); |
| } |
| |
| int main(int argc, char **argv) { |
| InitLLVM X(argc, argv); |
| |
| cl::ParseCommandLineOptions(argc, argv, "llvm symbol undecoration tool\n"); |
| |
| if (Decorated.empty()) |
| for (std::string Mangled; std::getline(std::cin, Mangled);) |
| demangleLine(llvm::outs(), Mangled, true); |
| else |
| for (const auto &Symbol : Decorated) |
| demangleLine(llvm::outs(), Symbol, false); |
| |
| return EXIT_SUCCESS; |
| } |