936dcc89da
This was originally a part of D149104 which was backed out. This change is uncontroversial though, so split it out and reland it. Reviewed By: MaskRay Differential Revision: https://reviews.llvm.org/D152042
65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
//===-- Demangle.cpp - Common demangling functions ------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file This file contains definitions of common demangling functions.
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///
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//===----------------------------------------------------------------------===//
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#include "llvm/Demangle/Demangle.h"
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#include "llvm/Demangle/StringViewExtras.h"
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#include <cstdlib>
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#include <cstring>
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using llvm::itanium_demangle::starts_with;
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std::string llvm::demangle(const std::string &MangledName) {
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std::string Result;
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const char *S = MangledName.c_str();
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if (nonMicrosoftDemangle(MangledName, Result))
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return Result;
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if (S[0] == '_' && nonMicrosoftDemangle(MangledName.substr(1), Result))
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return Result;
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if (char *Demangled = microsoftDemangle(S, nullptr, nullptr)) {
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Result = Demangled;
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std::free(Demangled);
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return Result;
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}
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return MangledName;
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}
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static bool isItaniumEncoding(std::string_view S) {
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// Itanium encoding requires 1 or 3 leading underscores, followed by 'Z'.
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return starts_with(S, "_Z") || starts_with(S, "___Z");
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}
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static bool isRustEncoding(std::string_view S) { return starts_with(S, "_R"); }
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static bool isDLangEncoding(std::string_view S) { return starts_with(S, "_D"); }
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bool llvm::nonMicrosoftDemangle(std::string_view MangledName,
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std::string &Result) {
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char *Demangled = nullptr;
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if (isItaniumEncoding(MangledName))
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Demangled = itaniumDemangle(MangledName);
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else if (isRustEncoding(MangledName))
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Demangled = rustDemangle(MangledName);
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else if (isDLangEncoding(MangledName))
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Demangled = dlangDemangle(MangledName);
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if (!Demangled)
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return false;
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Result = Demangled;
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std::free(Demangled);
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return true;
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}
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