2378 lines
76 KiB
C++
Vendored
2378 lines
76 KiB
C++
Vendored
//===- MicrosoftDemangle.cpp ----------------------------------------------===//
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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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// This file defines a demangler for MSVC-style mangled symbols.
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//
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// This file has no dependencies on the rest of LLVM so that it can be
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// easily reused in other programs such as libcxxabi.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Demangle/MicrosoftDemangle.h"
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#include "llvm/Demangle/Demangle.h"
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#include "llvm/Demangle/MicrosoftDemangleNodes.h"
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#include "llvm/Demangle/DemangleConfig.h"
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#include "llvm/Demangle/StringView.h"
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#include "llvm/Demangle/Utility.h"
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#include <array>
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#include <cctype>
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#include <cstdio>
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#include <tuple>
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using namespace llvm;
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using namespace ms_demangle;
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static bool startsWithDigit(StringView S) {
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return !S.empty() && std::isdigit(S.front());
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}
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struct NodeList {
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Node *N = nullptr;
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NodeList *Next = nullptr;
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};
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static bool isMemberPointer(StringView MangledName, bool &Error) {
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Error = false;
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switch (MangledName.popFront()) {
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case '$':
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// This is probably an rvalue reference (e.g. $$Q), and you cannot have an
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// rvalue reference to a member.
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return false;
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case 'A':
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// 'A' indicates a reference, and you cannot have a reference to a member
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// function or member.
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return false;
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case 'P':
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case 'Q':
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case 'R':
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case 'S':
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// These 4 values indicate some kind of pointer, but we still don't know
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// what.
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break;
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default:
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// isMemberPointer() is called only if isPointerType() returns true,
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// and it rejects other prefixes.
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DEMANGLE_UNREACHABLE;
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}
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// If it starts with a number, then 6 indicates a non-member function
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// pointer, and 8 indicates a member function pointer.
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if (startsWithDigit(MangledName)) {
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if (MangledName[0] != '6' && MangledName[0] != '8') {
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Error = true;
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return false;
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}
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return (MangledName[0] == '8');
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}
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// Remove ext qualifiers since those can appear on either type and are
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// therefore not indicative.
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MangledName.consumeFront('E'); // 64-bit
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MangledName.consumeFront('I'); // restrict
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MangledName.consumeFront('F'); // unaligned
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if (MangledName.empty()) {
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Error = true;
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return false;
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}
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// The next value should be either ABCD (non-member) or QRST (member).
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switch (MangledName.front()) {
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case 'A':
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case 'B':
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case 'C':
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case 'D':
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return false;
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case 'Q':
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case 'R':
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case 'S':
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case 'T':
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return true;
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default:
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Error = true;
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return false;
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}
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}
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static SpecialIntrinsicKind
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consumeSpecialIntrinsicKind(StringView &MangledName) {
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if (MangledName.consumeFront("?_7"))
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return SpecialIntrinsicKind::Vftable;
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if (MangledName.consumeFront("?_8"))
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return SpecialIntrinsicKind::Vbtable;
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if (MangledName.consumeFront("?_9"))
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return SpecialIntrinsicKind::VcallThunk;
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if (MangledName.consumeFront("?_A"))
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return SpecialIntrinsicKind::Typeof;
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if (MangledName.consumeFront("?_B"))
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return SpecialIntrinsicKind::LocalStaticGuard;
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if (MangledName.consumeFront("?_C"))
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return SpecialIntrinsicKind::StringLiteralSymbol;
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if (MangledName.consumeFront("?_P"))
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return SpecialIntrinsicKind::UdtReturning;
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if (MangledName.consumeFront("?_R0"))
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return SpecialIntrinsicKind::RttiTypeDescriptor;
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if (MangledName.consumeFront("?_R1"))
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return SpecialIntrinsicKind::RttiBaseClassDescriptor;
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if (MangledName.consumeFront("?_R2"))
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return SpecialIntrinsicKind::RttiBaseClassArray;
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if (MangledName.consumeFront("?_R3"))
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return SpecialIntrinsicKind::RttiClassHierarchyDescriptor;
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if (MangledName.consumeFront("?_R4"))
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return SpecialIntrinsicKind::RttiCompleteObjLocator;
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if (MangledName.consumeFront("?_S"))
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return SpecialIntrinsicKind::LocalVftable;
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if (MangledName.consumeFront("?__E"))
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return SpecialIntrinsicKind::DynamicInitializer;
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if (MangledName.consumeFront("?__F"))
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return SpecialIntrinsicKind::DynamicAtexitDestructor;
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if (MangledName.consumeFront("?__J"))
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return SpecialIntrinsicKind::LocalStaticThreadGuard;
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return SpecialIntrinsicKind::None;
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}
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static bool startsWithLocalScopePattern(StringView S) {
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if (!S.consumeFront('?'))
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return false;
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size_t End = S.find('?');
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if (End == StringView::npos)
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return false;
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StringView Candidate = S.substr(0, End);
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if (Candidate.empty())
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return false;
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// \?[0-9]\?
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// ?@? is the discriminator 0.
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if (Candidate.size() == 1)
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return Candidate[0] == '@' || (Candidate[0] >= '0' && Candidate[0] <= '9');
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// If it's not 0-9, then it's an encoded number terminated with an @
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if (Candidate.back() != '@')
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return false;
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Candidate = Candidate.dropBack();
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// An encoded number starts with B-P and all subsequent digits are in A-P.
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// Note that the reason the first digit cannot be A is two fold. First, it
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// would create an ambiguity with ?A which delimits the beginning of an
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// anonymous namespace. Second, A represents 0, and you don't start a multi
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// digit number with a leading 0. Presumably the anonymous namespace
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// ambiguity is also why single digit encoded numbers use 0-9 rather than A-J.
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if (Candidate[0] < 'B' || Candidate[0] > 'P')
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return false;
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Candidate = Candidate.dropFront();
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while (!Candidate.empty()) {
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if (Candidate[0] < 'A' || Candidate[0] > 'P')
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return false;
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Candidate = Candidate.dropFront();
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}
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return true;
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}
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static bool isTagType(StringView S) {
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switch (S.front()) {
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case 'T': // union
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case 'U': // struct
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case 'V': // class
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case 'W': // enum
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return true;
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}
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return false;
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}
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static bool isCustomType(StringView S) { return S[0] == '?'; }
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static bool isPointerType(StringView S) {
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if (S.startsWith("$$Q")) // foo &&
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return true;
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switch (S.front()) {
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case 'A': // foo &
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case 'P': // foo *
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case 'Q': // foo *const
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case 'R': // foo *volatile
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case 'S': // foo *const volatile
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return true;
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}
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return false;
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}
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static bool isArrayType(StringView S) { return S[0] == 'Y'; }
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static bool isFunctionType(StringView S) {
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return S.startsWith("$$A8@@") || S.startsWith("$$A6");
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}
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static FunctionRefQualifier
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demangleFunctionRefQualifier(StringView &MangledName) {
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if (MangledName.consumeFront('G'))
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return FunctionRefQualifier::Reference;
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else if (MangledName.consumeFront('H'))
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return FunctionRefQualifier::RValueReference;
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return FunctionRefQualifier::None;
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}
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static std::pair<Qualifiers, PointerAffinity>
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demanglePointerCVQualifiers(StringView &MangledName) {
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if (MangledName.consumeFront("$$Q"))
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return std::make_pair(Q_None, PointerAffinity::RValueReference);
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switch (MangledName.popFront()) {
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case 'A':
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return std::make_pair(Q_None, PointerAffinity::Reference);
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case 'P':
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return std::make_pair(Q_None, PointerAffinity::Pointer);
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case 'Q':
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return std::make_pair(Q_Const, PointerAffinity::Pointer);
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case 'R':
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return std::make_pair(Q_Volatile, PointerAffinity::Pointer);
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case 'S':
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return std::make_pair(Qualifiers(Q_Const | Q_Volatile),
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PointerAffinity::Pointer);
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}
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// This function is only called if isPointerType() returns true,
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// and it only returns true for the six cases listed above.
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DEMANGLE_UNREACHABLE;
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}
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StringView Demangler::copyString(StringView Borrowed) {
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char *Stable = Arena.allocUnalignedBuffer(Borrowed.size() + 1);
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std::strcpy(Stable, Borrowed.begin());
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return {Stable, Borrowed.size()};
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}
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SpecialTableSymbolNode *
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Demangler::demangleSpecialTableSymbolNode(StringView &MangledName,
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SpecialIntrinsicKind K) {
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NamedIdentifierNode *NI = Arena.alloc<NamedIdentifierNode>();
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switch (K) {
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case SpecialIntrinsicKind::Vftable:
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NI->Name = "`vftable'";
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break;
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case SpecialIntrinsicKind::Vbtable:
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NI->Name = "`vbtable'";
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break;
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case SpecialIntrinsicKind::LocalVftable:
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NI->Name = "`local vftable'";
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break;
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case SpecialIntrinsicKind::RttiCompleteObjLocator:
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NI->Name = "`RTTI Complete Object Locator'";
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break;
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default:
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DEMANGLE_UNREACHABLE;
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}
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QualifiedNameNode *QN = demangleNameScopeChain(MangledName, NI);
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SpecialTableSymbolNode *STSN = Arena.alloc<SpecialTableSymbolNode>();
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STSN->Name = QN;
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bool IsMember = false;
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if (MangledName.empty()) {
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Error = true;
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return nullptr;
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}
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char Front = MangledName.popFront();
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if (Front != '6' && Front != '7') {
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Error = true;
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return nullptr;
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}
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std::tie(STSN->Quals, IsMember) = demangleQualifiers(MangledName);
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if (!MangledName.consumeFront('@'))
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STSN->TargetName = demangleFullyQualifiedTypeName(MangledName);
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return STSN;
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}
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LocalStaticGuardVariableNode *
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Demangler::demangleLocalStaticGuard(StringView &MangledName, bool IsThread) {
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LocalStaticGuardIdentifierNode *LSGI =
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Arena.alloc<LocalStaticGuardIdentifierNode>();
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LSGI->IsThread = IsThread;
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QualifiedNameNode *QN = demangleNameScopeChain(MangledName, LSGI);
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LocalStaticGuardVariableNode *LSGVN =
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Arena.alloc<LocalStaticGuardVariableNode>();
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LSGVN->Name = QN;
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if (MangledName.consumeFront("4IA"))
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LSGVN->IsVisible = false;
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else if (MangledName.consumeFront("5"))
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LSGVN->IsVisible = true;
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else {
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Error = true;
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return nullptr;
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}
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if (!MangledName.empty())
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LSGI->ScopeIndex = demangleUnsigned(MangledName);
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return LSGVN;
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}
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static NamedIdentifierNode *synthesizeNamedIdentifier(ArenaAllocator &Arena,
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StringView Name) {
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NamedIdentifierNode *Id = Arena.alloc<NamedIdentifierNode>();
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Id->Name = Name;
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return Id;
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}
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static QualifiedNameNode *synthesizeQualifiedName(ArenaAllocator &Arena,
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IdentifierNode *Identifier) {
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QualifiedNameNode *QN = Arena.alloc<QualifiedNameNode>();
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QN->Components = Arena.alloc<NodeArrayNode>();
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QN->Components->Count = 1;
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QN->Components->Nodes = Arena.allocArray<Node *>(1);
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QN->Components->Nodes[0] = Identifier;
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return QN;
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}
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static QualifiedNameNode *synthesizeQualifiedName(ArenaAllocator &Arena,
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StringView Name) {
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NamedIdentifierNode *Id = synthesizeNamedIdentifier(Arena, Name);
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return synthesizeQualifiedName(Arena, Id);
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}
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static VariableSymbolNode *synthesizeVariable(ArenaAllocator &Arena,
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TypeNode *Type,
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StringView VariableName) {
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VariableSymbolNode *VSN = Arena.alloc<VariableSymbolNode>();
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VSN->Type = Type;
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VSN->Name = synthesizeQualifiedName(Arena, VariableName);
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return VSN;
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}
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VariableSymbolNode *Demangler::demangleUntypedVariable(
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ArenaAllocator &Arena, StringView &MangledName, StringView VariableName) {
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NamedIdentifierNode *NI = synthesizeNamedIdentifier(Arena, VariableName);
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QualifiedNameNode *QN = demangleNameScopeChain(MangledName, NI);
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VariableSymbolNode *VSN = Arena.alloc<VariableSymbolNode>();
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VSN->Name = QN;
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if (MangledName.consumeFront("8"))
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return VSN;
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Error = true;
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return nullptr;
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}
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VariableSymbolNode *
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Demangler::demangleRttiBaseClassDescriptorNode(ArenaAllocator &Arena,
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StringView &MangledName) {
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RttiBaseClassDescriptorNode *RBCDN =
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Arena.alloc<RttiBaseClassDescriptorNode>();
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RBCDN->NVOffset = demangleUnsigned(MangledName);
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RBCDN->VBPtrOffset = demangleSigned(MangledName);
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RBCDN->VBTableOffset = demangleUnsigned(MangledName);
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RBCDN->Flags = demangleUnsigned(MangledName);
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if (Error)
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return nullptr;
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VariableSymbolNode *VSN = Arena.alloc<VariableSymbolNode>();
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VSN->Name = demangleNameScopeChain(MangledName, RBCDN);
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MangledName.consumeFront('8');
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return VSN;
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}
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FunctionSymbolNode *Demangler::demangleInitFiniStub(StringView &MangledName,
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bool IsDestructor) {
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DynamicStructorIdentifierNode *DSIN =
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Arena.alloc<DynamicStructorIdentifierNode>();
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DSIN->IsDestructor = IsDestructor;
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bool IsKnownStaticDataMember = false;
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if (MangledName.consumeFront('?'))
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IsKnownStaticDataMember = true;
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SymbolNode *Symbol = demangleDeclarator(MangledName);
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if (Error)
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return nullptr;
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FunctionSymbolNode *FSN = nullptr;
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if (Symbol->kind() == NodeKind::VariableSymbol) {
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DSIN->Variable = static_cast<VariableSymbolNode *>(Symbol);
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// Older versions of clang mangled this type of symbol incorrectly. They
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// would omit the leading ? and they would only emit a single @ at the end.
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// The correct mangling is a leading ? and 2 trailing @ signs. Handle
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// both cases.
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int AtCount = IsKnownStaticDataMember ? 2 : 1;
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for (int I = 0; I < AtCount; ++I) {
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if (MangledName.consumeFront('@'))
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continue;
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Error = true;
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return nullptr;
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}
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FSN = demangleFunctionEncoding(MangledName);
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if (FSN)
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FSN->Name = synthesizeQualifiedName(Arena, DSIN);
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} else {
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if (IsKnownStaticDataMember) {
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// This was supposed to be a static data member, but we got a function.
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Error = true;
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return nullptr;
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}
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FSN = static_cast<FunctionSymbolNode *>(Symbol);
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DSIN->Name = Symbol->Name;
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FSN->Name = synthesizeQualifiedName(Arena, DSIN);
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}
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return FSN;
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}
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SymbolNode *Demangler::demangleSpecialIntrinsic(StringView &MangledName) {
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SpecialIntrinsicKind SIK = consumeSpecialIntrinsicKind(MangledName);
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switch (SIK) {
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case SpecialIntrinsicKind::None:
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return nullptr;
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case SpecialIntrinsicKind::StringLiteralSymbol:
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return demangleStringLiteral(MangledName);
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case SpecialIntrinsicKind::Vftable:
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case SpecialIntrinsicKind::Vbtable:
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case SpecialIntrinsicKind::LocalVftable:
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case SpecialIntrinsicKind::RttiCompleteObjLocator:
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return demangleSpecialTableSymbolNode(MangledName, SIK);
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case SpecialIntrinsicKind::VcallThunk:
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return demangleVcallThunkNode(MangledName);
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case SpecialIntrinsicKind::LocalStaticGuard:
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return demangleLocalStaticGuard(MangledName, /*IsThread=*/false);
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case SpecialIntrinsicKind::LocalStaticThreadGuard:
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return demangleLocalStaticGuard(MangledName, /*IsThread=*/true);
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case SpecialIntrinsicKind::RttiTypeDescriptor: {
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TypeNode *T = demangleType(MangledName, QualifierMangleMode::Result);
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if (Error)
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break;
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if (!MangledName.consumeFront("@8"))
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break;
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if (!MangledName.empty())
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break;
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return synthesizeVariable(Arena, T, "`RTTI Type Descriptor'");
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}
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case SpecialIntrinsicKind::RttiBaseClassArray:
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return demangleUntypedVariable(Arena, MangledName,
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"`RTTI Base Class Array'");
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case SpecialIntrinsicKind::RttiClassHierarchyDescriptor:
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return demangleUntypedVariable(Arena, MangledName,
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"`RTTI Class Hierarchy Descriptor'");
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case SpecialIntrinsicKind::RttiBaseClassDescriptor:
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return demangleRttiBaseClassDescriptorNode(Arena, MangledName);
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case SpecialIntrinsicKind::DynamicInitializer:
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return demangleInitFiniStub(MangledName, /*IsDestructor=*/false);
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case SpecialIntrinsicKind::DynamicAtexitDestructor:
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return demangleInitFiniStub(MangledName, /*IsDestructor=*/true);
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case SpecialIntrinsicKind::Typeof:
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case SpecialIntrinsicKind::UdtReturning:
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// It's unclear which tools produces these manglings, so demangling
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// support is not (yet?) implemented.
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break;
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case SpecialIntrinsicKind::Unknown:
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DEMANGLE_UNREACHABLE; // Never returned by consumeSpecialIntrinsicKind.
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}
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Error = true;
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return nullptr;
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}
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IdentifierNode *
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Demangler::demangleFunctionIdentifierCode(StringView &MangledName) {
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assert(MangledName.startsWith('?'));
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MangledName = MangledName.dropFront();
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if (MangledName.empty()) {
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Error = true;
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return nullptr;
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}
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if (MangledName.consumeFront("__"))
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return demangleFunctionIdentifierCode(
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MangledName, FunctionIdentifierCodeGroup::DoubleUnder);
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if (MangledName.consumeFront("_"))
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return demangleFunctionIdentifierCode(MangledName,
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FunctionIdentifierCodeGroup::Under);
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return demangleFunctionIdentifierCode(MangledName,
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FunctionIdentifierCodeGroup::Basic);
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}
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StructorIdentifierNode *
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Demangler::demangleStructorIdentifier(StringView &MangledName,
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bool IsDestructor) {
|
|
StructorIdentifierNode *N = Arena.alloc<StructorIdentifierNode>();
|
|
N->IsDestructor = IsDestructor;
|
|
return N;
|
|
}
|
|
|
|
ConversionOperatorIdentifierNode *
|
|
Demangler::demangleConversionOperatorIdentifier(StringView &MangledName) {
|
|
ConversionOperatorIdentifierNode *N =
|
|
Arena.alloc<ConversionOperatorIdentifierNode>();
|
|
return N;
|
|
}
|
|
|
|
LiteralOperatorIdentifierNode *
|
|
Demangler::demangleLiteralOperatorIdentifier(StringView &MangledName) {
|
|
LiteralOperatorIdentifierNode *N =
|
|
Arena.alloc<LiteralOperatorIdentifierNode>();
|
|
N->Name = demangleSimpleString(MangledName, /*Memorize=*/false);
|
|
return N;
|
|
}
|
|
|
|
IntrinsicFunctionKind
|
|
Demangler::translateIntrinsicFunctionCode(char CH,
|
|
FunctionIdentifierCodeGroup Group) {
|
|
using IFK = IntrinsicFunctionKind;
|
|
if (!(CH >= '0' && CH <= '9') && !(CH >= 'A' && CH <= 'Z')) {
|
|
Error = true;
|
|
return IFK::None;
|
|
}
|
|
|
|
// Not all ? identifiers are intrinsics *functions*. This function only maps
|
|
// operator codes for the special functions, all others are handled elsewhere,
|
|
// hence the IFK::None entries in the table.
|
|
static IFK Basic[36] = {
|
|
IFK::None, // ?0 # Foo::Foo()
|
|
IFK::None, // ?1 # Foo::~Foo()
|
|
IFK::New, // ?2 # operator new
|
|
IFK::Delete, // ?3 # operator delete
|
|
IFK::Assign, // ?4 # operator=
|
|
IFK::RightShift, // ?5 # operator>>
|
|
IFK::LeftShift, // ?6 # operator<<
|
|
IFK::LogicalNot, // ?7 # operator!
|
|
IFK::Equals, // ?8 # operator==
|
|
IFK::NotEquals, // ?9 # operator!=
|
|
IFK::ArraySubscript, // ?A # operator[]
|
|
IFK::None, // ?B # Foo::operator <type>()
|
|
IFK::Pointer, // ?C # operator->
|
|
IFK::Dereference, // ?D # operator*
|
|
IFK::Increment, // ?E # operator++
|
|
IFK::Decrement, // ?F # operator--
|
|
IFK::Minus, // ?G # operator-
|
|
IFK::Plus, // ?H # operator+
|
|
IFK::BitwiseAnd, // ?I # operator&
|
|
IFK::MemberPointer, // ?J # operator->*
|
|
IFK::Divide, // ?K # operator/
|
|
IFK::Modulus, // ?L # operator%
|
|
IFK::LessThan, // ?M operator<
|
|
IFK::LessThanEqual, // ?N operator<=
|
|
IFK::GreaterThan, // ?O operator>
|
|
IFK::GreaterThanEqual, // ?P operator>=
|
|
IFK::Comma, // ?Q operator,
|
|
IFK::Parens, // ?R operator()
|
|
IFK::BitwiseNot, // ?S operator~
|
|
IFK::BitwiseXor, // ?T operator^
|
|
IFK::BitwiseOr, // ?U operator|
|
|
IFK::LogicalAnd, // ?V operator&&
|
|
IFK::LogicalOr, // ?W operator||
|
|
IFK::TimesEqual, // ?X operator*=
|
|
IFK::PlusEqual, // ?Y operator+=
|
|
IFK::MinusEqual, // ?Z operator-=
|
|
};
|
|
static IFK Under[36] = {
|
|
IFK::DivEqual, // ?_0 operator/=
|
|
IFK::ModEqual, // ?_1 operator%=
|
|
IFK::RshEqual, // ?_2 operator>>=
|
|
IFK::LshEqual, // ?_3 operator<<=
|
|
IFK::BitwiseAndEqual, // ?_4 operator&=
|
|
IFK::BitwiseOrEqual, // ?_5 operator|=
|
|
IFK::BitwiseXorEqual, // ?_6 operator^=
|
|
IFK::None, // ?_7 # vftable
|
|
IFK::None, // ?_8 # vbtable
|
|
IFK::None, // ?_9 # vcall
|
|
IFK::None, // ?_A # typeof
|
|
IFK::None, // ?_B # local static guard
|
|
IFK::None, // ?_C # string literal
|
|
IFK::VbaseDtor, // ?_D # vbase destructor
|
|
IFK::VecDelDtor, // ?_E # vector deleting destructor
|
|
IFK::DefaultCtorClosure, // ?_F # default constructor closure
|
|
IFK::ScalarDelDtor, // ?_G # scalar deleting destructor
|
|
IFK::VecCtorIter, // ?_H # vector constructor iterator
|
|
IFK::VecDtorIter, // ?_I # vector destructor iterator
|
|
IFK::VecVbaseCtorIter, // ?_J # vector vbase constructor iterator
|
|
IFK::VdispMap, // ?_K # virtual displacement map
|
|
IFK::EHVecCtorIter, // ?_L # eh vector constructor iterator
|
|
IFK::EHVecDtorIter, // ?_M # eh vector destructor iterator
|
|
IFK::EHVecVbaseCtorIter, // ?_N # eh vector vbase constructor iterator
|
|
IFK::CopyCtorClosure, // ?_O # copy constructor closure
|
|
IFK::None, // ?_P<name> # udt returning <name>
|
|
IFK::None, // ?_Q # <unknown>
|
|
IFK::None, // ?_R0 - ?_R4 # RTTI Codes
|
|
IFK::None, // ?_S # local vftable
|
|
IFK::LocalVftableCtorClosure, // ?_T # local vftable constructor closure
|
|
IFK::ArrayNew, // ?_U operator new[]
|
|
IFK::ArrayDelete, // ?_V operator delete[]
|
|
IFK::None, // ?_W <unused>
|
|
IFK::None, // ?_X <unused>
|
|
IFK::None, // ?_Y <unused>
|
|
IFK::None, // ?_Z <unused>
|
|
};
|
|
static IFK DoubleUnder[36] = {
|
|
IFK::None, // ?__0 <unused>
|
|
IFK::None, // ?__1 <unused>
|
|
IFK::None, // ?__2 <unused>
|
|
IFK::None, // ?__3 <unused>
|
|
IFK::None, // ?__4 <unused>
|
|
IFK::None, // ?__5 <unused>
|
|
IFK::None, // ?__6 <unused>
|
|
IFK::None, // ?__7 <unused>
|
|
IFK::None, // ?__8 <unused>
|
|
IFK::None, // ?__9 <unused>
|
|
IFK::ManVectorCtorIter, // ?__A managed vector ctor iterator
|
|
IFK::ManVectorDtorIter, // ?__B managed vector dtor iterator
|
|
IFK::EHVectorCopyCtorIter, // ?__C EH vector copy ctor iterator
|
|
IFK::EHVectorVbaseCopyCtorIter, // ?__D EH vector vbase copy ctor iter
|
|
IFK::None, // ?__E dynamic initializer for `T'
|
|
IFK::None, // ?__F dynamic atexit destructor for `T'
|
|
IFK::VectorCopyCtorIter, // ?__G vector copy constructor iter
|
|
IFK::VectorVbaseCopyCtorIter, // ?__H vector vbase copy ctor iter
|
|
IFK::ManVectorVbaseCopyCtorIter, // ?__I managed vector vbase copy ctor
|
|
// iter
|
|
IFK::None, // ?__J local static thread guard
|
|
IFK::None, // ?__K operator ""_name
|
|
IFK::CoAwait, // ?__L operator co_await
|
|
IFK::Spaceship, // ?__M operator<=>
|
|
IFK::None, // ?__N <unused>
|
|
IFK::None, // ?__O <unused>
|
|
IFK::None, // ?__P <unused>
|
|
IFK::None, // ?__Q <unused>
|
|
IFK::None, // ?__R <unused>
|
|
IFK::None, // ?__S <unused>
|
|
IFK::None, // ?__T <unused>
|
|
IFK::None, // ?__U <unused>
|
|
IFK::None, // ?__V <unused>
|
|
IFK::None, // ?__W <unused>
|
|
IFK::None, // ?__X <unused>
|
|
IFK::None, // ?__Y <unused>
|
|
IFK::None, // ?__Z <unused>
|
|
};
|
|
|
|
int Index = (CH >= '0' && CH <= '9') ? (CH - '0') : (CH - 'A' + 10);
|
|
switch (Group) {
|
|
case FunctionIdentifierCodeGroup::Basic:
|
|
return Basic[Index];
|
|
case FunctionIdentifierCodeGroup::Under:
|
|
return Under[Index];
|
|
case FunctionIdentifierCodeGroup::DoubleUnder:
|
|
return DoubleUnder[Index];
|
|
}
|
|
DEMANGLE_UNREACHABLE;
|
|
}
|
|
|
|
IdentifierNode *
|
|
Demangler::demangleFunctionIdentifierCode(StringView &MangledName,
|
|
FunctionIdentifierCodeGroup Group) {
|
|
if (MangledName.empty()) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
switch (Group) {
|
|
case FunctionIdentifierCodeGroup::Basic:
|
|
switch (char CH = MangledName.popFront()) {
|
|
case '0':
|
|
case '1':
|
|
return demangleStructorIdentifier(MangledName, CH == '1');
|
|
case 'B':
|
|
return demangleConversionOperatorIdentifier(MangledName);
|
|
default:
|
|
return Arena.alloc<IntrinsicFunctionIdentifierNode>(
|
|
translateIntrinsicFunctionCode(CH, Group));
|
|
}
|
|
case FunctionIdentifierCodeGroup::Under:
|
|
return Arena.alloc<IntrinsicFunctionIdentifierNode>(
|
|
translateIntrinsicFunctionCode(MangledName.popFront(), Group));
|
|
case FunctionIdentifierCodeGroup::DoubleUnder:
|
|
switch (char CH = MangledName.popFront()) {
|
|
case 'K':
|
|
return demangleLiteralOperatorIdentifier(MangledName);
|
|
default:
|
|
return Arena.alloc<IntrinsicFunctionIdentifierNode>(
|
|
translateIntrinsicFunctionCode(CH, Group));
|
|
}
|
|
}
|
|
|
|
DEMANGLE_UNREACHABLE;
|
|
}
|
|
|
|
SymbolNode *Demangler::demangleEncodedSymbol(StringView &MangledName,
|
|
QualifiedNameNode *Name) {
|
|
if (MangledName.empty()) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
|
|
// Read a variable.
|
|
switch (MangledName.front()) {
|
|
case '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4': {
|
|
StorageClass SC = demangleVariableStorageClass(MangledName);
|
|
return demangleVariableEncoding(MangledName, SC);
|
|
}
|
|
}
|
|
FunctionSymbolNode *FSN = demangleFunctionEncoding(MangledName);
|
|
|
|
IdentifierNode *UQN = Name->getUnqualifiedIdentifier();
|
|
if (UQN->kind() == NodeKind::ConversionOperatorIdentifier) {
|
|
ConversionOperatorIdentifierNode *COIN =
|
|
static_cast<ConversionOperatorIdentifierNode *>(UQN);
|
|
if (FSN)
|
|
COIN->TargetType = FSN->Signature->ReturnType;
|
|
}
|
|
return FSN;
|
|
}
|
|
|
|
SymbolNode *Demangler::demangleDeclarator(StringView &MangledName) {
|
|
// What follows is a main symbol name. This may include namespaces or class
|
|
// back references.
|
|
QualifiedNameNode *QN = demangleFullyQualifiedSymbolName(MangledName);
|
|
if (Error)
|
|
return nullptr;
|
|
|
|
SymbolNode *Symbol = demangleEncodedSymbol(MangledName, QN);
|
|
if (Error)
|
|
return nullptr;
|
|
Symbol->Name = QN;
|
|
|
|
IdentifierNode *UQN = QN->getUnqualifiedIdentifier();
|
|
if (UQN->kind() == NodeKind::ConversionOperatorIdentifier) {
|
|
ConversionOperatorIdentifierNode *COIN =
|
|
static_cast<ConversionOperatorIdentifierNode *>(UQN);
|
|
if (!COIN->TargetType) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
}
|
|
return Symbol;
|
|
}
|
|
|
|
SymbolNode *Demangler::demangleMD5Name(StringView &MangledName) {
|
|
assert(MangledName.startsWith("??@"));
|
|
// This is an MD5 mangled name. We can't demangle it, just return the
|
|
// mangled name.
|
|
// An MD5 mangled name is ??@ followed by 32 characters and a terminating @.
|
|
size_t MD5Last = MangledName.find('@', strlen("??@"));
|
|
if (MD5Last == StringView::npos) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
const char *Start = MangledName.begin();
|
|
MangledName = MangledName.dropFront(MD5Last + 1);
|
|
|
|
// There are two additional special cases for MD5 names:
|
|
// 1. For complete object locators where the object name is long enough
|
|
// for the object to have an MD5 name, the complete object locator is
|
|
// called ??@...@??_R4@ (with a trailing "??_R4@" instead of the usual
|
|
// leading "??_R4". This is handled here.
|
|
// 2. For catchable types, in versions of MSVC before 2015 (<1900) or after
|
|
// 2017.2 (>= 1914), the catchable type mangling is _CT??@...@??@...@8
|
|
// instead of_CT??@...@8 with just one MD5 name. Since we don't yet
|
|
// demangle catchable types anywhere, this isn't handled for MD5 names
|
|
// either.
|
|
MangledName.consumeFront("??_R4@");
|
|
|
|
StringView MD5(Start, MangledName.begin());
|
|
SymbolNode *S = Arena.alloc<SymbolNode>(NodeKind::Md5Symbol);
|
|
S->Name = synthesizeQualifiedName(Arena, MD5);
|
|
|
|
return S;
|
|
}
|
|
|
|
SymbolNode *Demangler::demangleTypeinfoName(StringView &MangledName) {
|
|
assert(MangledName.startsWith('.'));
|
|
MangledName.consumeFront('.');
|
|
|
|
TypeNode *T = demangleType(MangledName, QualifierMangleMode::Result);
|
|
if (Error || !MangledName.empty()) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
return synthesizeVariable(Arena, T, "`RTTI Type Descriptor Name'");
|
|
}
|
|
|
|
// Parser entry point.
|
|
SymbolNode *Demangler::parse(StringView &MangledName) {
|
|
// Typeinfo names are strings stored in RTTI data. They're not symbol names.
|
|
// It's still useful to demangle them. They're the only demangled entity
|
|
// that doesn't start with a "?" but a ".".
|
|
if (MangledName.startsWith('.'))
|
|
return demangleTypeinfoName(MangledName);
|
|
|
|
if (MangledName.startsWith("??@"))
|
|
return demangleMD5Name(MangledName);
|
|
|
|
// MSVC-style mangled symbols must start with '?'.
|
|
if (!MangledName.startsWith('?')) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
|
|
MangledName.consumeFront('?');
|
|
|
|
// ?$ is a template instantiation, but all other names that start with ? are
|
|
// operators / special names.
|
|
if (SymbolNode *SI = demangleSpecialIntrinsic(MangledName))
|
|
return SI;
|
|
|
|
return demangleDeclarator(MangledName);
|
|
}
|
|
|
|
TagTypeNode *Demangler::parseTagUniqueName(StringView &MangledName) {
|
|
if (!MangledName.consumeFront(".?A"))
|
|
return nullptr;
|
|
MangledName.consumeFront(".?A");
|
|
if (MangledName.empty())
|
|
return nullptr;
|
|
|
|
return demangleClassType(MangledName);
|
|
}
|
|
|
|
// <type-encoding> ::= <storage-class> <variable-type>
|
|
// <storage-class> ::= 0 # private static member
|
|
// ::= 1 # protected static member
|
|
// ::= 2 # public static member
|
|
// ::= 3 # global
|
|
// ::= 4 # static local
|
|
|
|
VariableSymbolNode *Demangler::demangleVariableEncoding(StringView &MangledName,
|
|
StorageClass SC) {
|
|
VariableSymbolNode *VSN = Arena.alloc<VariableSymbolNode>();
|
|
|
|
VSN->Type = demangleType(MangledName, QualifierMangleMode::Drop);
|
|
VSN->SC = SC;
|
|
|
|
if (Error)
|
|
return nullptr;
|
|
|
|
// <variable-type> ::= <type> <cvr-qualifiers>
|
|
// ::= <type> <pointee-cvr-qualifiers> # pointers, references
|
|
switch (VSN->Type->kind()) {
|
|
case NodeKind::PointerType: {
|
|
PointerTypeNode *PTN = static_cast<PointerTypeNode *>(VSN->Type);
|
|
|
|
Qualifiers ExtraChildQuals = Q_None;
|
|
PTN->Quals = Qualifiers(VSN->Type->Quals |
|
|
demanglePointerExtQualifiers(MangledName));
|
|
|
|
bool IsMember = false;
|
|
std::tie(ExtraChildQuals, IsMember) = demangleQualifiers(MangledName);
|
|
|
|
if (PTN->ClassParent) {
|
|
QualifiedNameNode *BackRefName =
|
|
demangleFullyQualifiedTypeName(MangledName);
|
|
(void)BackRefName;
|
|
}
|
|
PTN->Pointee->Quals = Qualifiers(PTN->Pointee->Quals | ExtraChildQuals);
|
|
|
|
break;
|
|
}
|
|
default:
|
|
VSN->Type->Quals = demangleQualifiers(MangledName).first;
|
|
break;
|
|
}
|
|
|
|
return VSN;
|
|
}
|
|
|
|
// Sometimes numbers are encoded in mangled symbols. For example,
|
|
// "int (*x)[20]" is a valid C type (x is a pointer to an array of
|
|
// length 20), so we need some way to embed numbers as part of symbols.
|
|
// This function parses it.
|
|
//
|
|
// <number> ::= [?] <non-negative integer>
|
|
//
|
|
// <non-negative integer> ::= <decimal digit> # when 1 <= Number <= 10
|
|
// ::= <hex digit>+ @ # when Number == 0 or >= 10
|
|
//
|
|
// <hex-digit> ::= [A-P] # A = 0, B = 1, ...
|
|
std::pair<uint64_t, bool> Demangler::demangleNumber(StringView &MangledName) {
|
|
bool IsNegative = MangledName.consumeFront('?');
|
|
|
|
if (startsWithDigit(MangledName)) {
|
|
uint64_t Ret = MangledName[0] - '0' + 1;
|
|
MangledName = MangledName.dropFront(1);
|
|
return {Ret, IsNegative};
|
|
}
|
|
|
|
uint64_t Ret = 0;
|
|
for (size_t i = 0; i < MangledName.size(); ++i) {
|
|
char C = MangledName[i];
|
|
if (C == '@') {
|
|
MangledName = MangledName.dropFront(i + 1);
|
|
return {Ret, IsNegative};
|
|
}
|
|
if ('A' <= C && C <= 'P') {
|
|
Ret = (Ret << 4) + (C - 'A');
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
Error = true;
|
|
return {0ULL, false};
|
|
}
|
|
|
|
uint64_t Demangler::demangleUnsigned(StringView &MangledName) {
|
|
bool IsNegative = false;
|
|
uint64_t Number = 0;
|
|
std::tie(Number, IsNegative) = demangleNumber(MangledName);
|
|
if (IsNegative)
|
|
Error = true;
|
|
return Number;
|
|
}
|
|
|
|
int64_t Demangler::demangleSigned(StringView &MangledName) {
|
|
bool IsNegative = false;
|
|
uint64_t Number = 0;
|
|
std::tie(Number, IsNegative) = demangleNumber(MangledName);
|
|
if (Number > INT64_MAX)
|
|
Error = true;
|
|
int64_t I = static_cast<int64_t>(Number);
|
|
return IsNegative ? -I : I;
|
|
}
|
|
|
|
// First 10 strings can be referenced by special BackReferences ?0, ?1, ..., ?9.
|
|
// Memorize it.
|
|
void Demangler::memorizeString(StringView S) {
|
|
if (Backrefs.NamesCount >= BackrefContext::Max)
|
|
return;
|
|
for (size_t i = 0; i < Backrefs.NamesCount; ++i)
|
|
if (S == Backrefs.Names[i]->Name)
|
|
return;
|
|
NamedIdentifierNode *N = Arena.alloc<NamedIdentifierNode>();
|
|
N->Name = S;
|
|
Backrefs.Names[Backrefs.NamesCount++] = N;
|
|
}
|
|
|
|
NamedIdentifierNode *Demangler::demangleBackRefName(StringView &MangledName) {
|
|
assert(startsWithDigit(MangledName));
|
|
|
|
size_t I = MangledName[0] - '0';
|
|
if (I >= Backrefs.NamesCount) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
|
|
MangledName = MangledName.dropFront();
|
|
return Backrefs.Names[I];
|
|
}
|
|
|
|
void Demangler::memorizeIdentifier(IdentifierNode *Identifier) {
|
|
// Render this class template name into a string buffer so that we can
|
|
// memorize it for the purpose of back-referencing.
|
|
OutputStream OS;
|
|
if (!initializeOutputStream(nullptr, nullptr, OS, 1024))
|
|
// FIXME: Propagate out-of-memory as an error?
|
|
std::terminate();
|
|
Identifier->output(OS, OF_Default);
|
|
OS << '\0';
|
|
char *Name = OS.getBuffer();
|
|
|
|
StringView Owned = copyString(Name);
|
|
memorizeString(Owned);
|
|
std::free(Name);
|
|
}
|
|
|
|
IdentifierNode *
|
|
Demangler::demangleTemplateInstantiationName(StringView &MangledName,
|
|
NameBackrefBehavior NBB) {
|
|
assert(MangledName.startsWith("?$"));
|
|
MangledName.consumeFront("?$");
|
|
|
|
BackrefContext OuterContext;
|
|
std::swap(OuterContext, Backrefs);
|
|
|
|
IdentifierNode *Identifier =
|
|
demangleUnqualifiedSymbolName(MangledName, NBB_Simple);
|
|
if (!Error)
|
|
Identifier->TemplateParams = demangleTemplateParameterList(MangledName);
|
|
|
|
std::swap(OuterContext, Backrefs);
|
|
if (Error)
|
|
return nullptr;
|
|
|
|
if (NBB & NBB_Template) {
|
|
// NBB_Template is only set for types and non-leaf names ("a::" in "a::b").
|
|
// Structors and conversion operators only makes sense in a leaf name, so
|
|
// reject them in NBB_Template contexts.
|
|
if (Identifier->kind() == NodeKind::ConversionOperatorIdentifier ||
|
|
Identifier->kind() == NodeKind::StructorIdentifier) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
|
|
memorizeIdentifier(Identifier);
|
|
}
|
|
|
|
return Identifier;
|
|
}
|
|
|
|
NamedIdentifierNode *Demangler::demangleSimpleName(StringView &MangledName,
|
|
bool Memorize) {
|
|
StringView S = demangleSimpleString(MangledName, Memorize);
|
|
if (Error)
|
|
return nullptr;
|
|
|
|
NamedIdentifierNode *Name = Arena.alloc<NamedIdentifierNode>();
|
|
Name->Name = S;
|
|
return Name;
|
|
}
|
|
|
|
static bool isRebasedHexDigit(char C) { return (C >= 'A' && C <= 'P'); }
|
|
|
|
static uint8_t rebasedHexDigitToNumber(char C) {
|
|
assert(isRebasedHexDigit(C));
|
|
return (C <= 'J') ? (C - 'A') : (10 + C - 'K');
|
|
}
|
|
|
|
uint8_t Demangler::demangleCharLiteral(StringView &MangledName) {
|
|
assert(!MangledName.empty());
|
|
if (!MangledName.startsWith('?'))
|
|
return MangledName.popFront();
|
|
|
|
MangledName = MangledName.dropFront();
|
|
if (MangledName.empty())
|
|
goto CharLiteralError;
|
|
|
|
if (MangledName.consumeFront('$')) {
|
|
// Two hex digits
|
|
if (MangledName.size() < 2)
|
|
goto CharLiteralError;
|
|
StringView Nibbles = MangledName.substr(0, 2);
|
|
if (!isRebasedHexDigit(Nibbles[0]) || !isRebasedHexDigit(Nibbles[1]))
|
|
goto CharLiteralError;
|
|
// Don't append the null terminator.
|
|
uint8_t C1 = rebasedHexDigitToNumber(Nibbles[0]);
|
|
uint8_t C2 = rebasedHexDigitToNumber(Nibbles[1]);
|
|
MangledName = MangledName.dropFront(2);
|
|
return (C1 << 4) | C2;
|
|
}
|
|
|
|
if (startsWithDigit(MangledName)) {
|
|
const char *Lookup = ",/\\:. \n\t'-";
|
|
char C = Lookup[MangledName[0] - '0'];
|
|
MangledName = MangledName.dropFront();
|
|
return C;
|
|
}
|
|
|
|
if (MangledName[0] >= 'a' && MangledName[0] <= 'z') {
|
|
char Lookup[26] = {'\xE1', '\xE2', '\xE3', '\xE4', '\xE5', '\xE6', '\xE7',
|
|
'\xE8', '\xE9', '\xEA', '\xEB', '\xEC', '\xED', '\xEE',
|
|
'\xEF', '\xF0', '\xF1', '\xF2', '\xF3', '\xF4', '\xF5',
|
|
'\xF6', '\xF7', '\xF8', '\xF9', '\xFA'};
|
|
char C = Lookup[MangledName[0] - 'a'];
|
|
MangledName = MangledName.dropFront();
|
|
return C;
|
|
}
|
|
|
|
if (MangledName[0] >= 'A' && MangledName[0] <= 'Z') {
|
|
char Lookup[26] = {'\xC1', '\xC2', '\xC3', '\xC4', '\xC5', '\xC6', '\xC7',
|
|
'\xC8', '\xC9', '\xCA', '\xCB', '\xCC', '\xCD', '\xCE',
|
|
'\xCF', '\xD0', '\xD1', '\xD2', '\xD3', '\xD4', '\xD5',
|
|
'\xD6', '\xD7', '\xD8', '\xD9', '\xDA'};
|
|
char C = Lookup[MangledName[0] - 'A'];
|
|
MangledName = MangledName.dropFront();
|
|
return C;
|
|
}
|
|
|
|
CharLiteralError:
|
|
Error = true;
|
|
return '\0';
|
|
}
|
|
|
|
wchar_t Demangler::demangleWcharLiteral(StringView &MangledName) {
|
|
uint8_t C1, C2;
|
|
|
|
C1 = demangleCharLiteral(MangledName);
|
|
if (Error || MangledName.empty())
|
|
goto WCharLiteralError;
|
|
C2 = demangleCharLiteral(MangledName);
|
|
if (Error)
|
|
goto WCharLiteralError;
|
|
|
|
return ((wchar_t)C1 << 8) | (wchar_t)C2;
|
|
|
|
WCharLiteralError:
|
|
Error = true;
|
|
return L'\0';
|
|
}
|
|
|
|
static void writeHexDigit(char *Buffer, uint8_t Digit) {
|
|
assert(Digit <= 15);
|
|
*Buffer = (Digit < 10) ? ('0' + Digit) : ('A' + Digit - 10);
|
|
}
|
|
|
|
static void outputHex(OutputStream &OS, unsigned C) {
|
|
assert (C != 0);
|
|
|
|
// It's easier to do the math if we can work from right to left, but we need
|
|
// to print the numbers from left to right. So render this into a temporary
|
|
// buffer first, then output the temporary buffer. Each byte is of the form
|
|
// \xAB, which means that each byte needs 4 characters. Since there are at
|
|
// most 4 bytes, we need a 4*4+1 = 17 character temporary buffer.
|
|
char TempBuffer[17];
|
|
|
|
::memset(TempBuffer, 0, sizeof(TempBuffer));
|
|
constexpr int MaxPos = sizeof(TempBuffer) - 1;
|
|
|
|
int Pos = MaxPos - 1; // TempBuffer[MaxPos] is the terminating \0.
|
|
while (C != 0) {
|
|
for (int I = 0; I < 2; ++I) {
|
|
writeHexDigit(&TempBuffer[Pos--], C % 16);
|
|
C /= 16;
|
|
}
|
|
}
|
|
TempBuffer[Pos--] = 'x';
|
|
assert(Pos >= 0);
|
|
TempBuffer[Pos--] = '\\';
|
|
OS << StringView(&TempBuffer[Pos + 1]);
|
|
}
|
|
|
|
static void outputEscapedChar(OutputStream &OS, unsigned C) {
|
|
switch (C) {
|
|
case '\0': // nul
|
|
OS << "\\0";
|
|
return;
|
|
case '\'': // single quote
|
|
OS << "\\\'";
|
|
return;
|
|
case '\"': // double quote
|
|
OS << "\\\"";
|
|
return;
|
|
case '\\': // backslash
|
|
OS << "\\\\";
|
|
return;
|
|
case '\a': // bell
|
|
OS << "\\a";
|
|
return;
|
|
case '\b': // backspace
|
|
OS << "\\b";
|
|
return;
|
|
case '\f': // form feed
|
|
OS << "\\f";
|
|
return;
|
|
case '\n': // new line
|
|
OS << "\\n";
|
|
return;
|
|
case '\r': // carriage return
|
|
OS << "\\r";
|
|
return;
|
|
case '\t': // tab
|
|
OS << "\\t";
|
|
return;
|
|
case '\v': // vertical tab
|
|
OS << "\\v";
|
|
return;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (C > 0x1F && C < 0x7F) {
|
|
// Standard ascii char.
|
|
OS << (char)C;
|
|
return;
|
|
}
|
|
|
|
outputHex(OS, C);
|
|
}
|
|
|
|
static unsigned countTrailingNullBytes(const uint8_t *StringBytes, int Length) {
|
|
const uint8_t *End = StringBytes + Length - 1;
|
|
unsigned Count = 0;
|
|
while (Length > 0 && *End == 0) {
|
|
--Length;
|
|
--End;
|
|
++Count;
|
|
}
|
|
return Count;
|
|
}
|
|
|
|
static unsigned countEmbeddedNulls(const uint8_t *StringBytes,
|
|
unsigned Length) {
|
|
unsigned Result = 0;
|
|
for (unsigned I = 0; I < Length; ++I) {
|
|
if (*StringBytes++ == 0)
|
|
++Result;
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
// A mangled (non-wide) string literal stores the total length of the string it
|
|
// refers to (passed in NumBytes), and it contains up to 32 bytes of actual text
|
|
// (passed in StringBytes, NumChars).
|
|
static unsigned guessCharByteSize(const uint8_t *StringBytes, unsigned NumChars,
|
|
uint64_t NumBytes) {
|
|
assert(NumBytes > 0);
|
|
|
|
// If the number of bytes is odd, this is guaranteed to be a char string.
|
|
if (NumBytes % 2 == 1)
|
|
return 1;
|
|
|
|
// All strings can encode at most 32 bytes of data. If it's less than that,
|
|
// then we encoded the entire string. In this case we check for a 1-byte,
|
|
// 2-byte, or 4-byte null terminator.
|
|
if (NumBytes < 32) {
|
|
unsigned TrailingNulls = countTrailingNullBytes(StringBytes, NumChars);
|
|
if (TrailingNulls >= 4 && NumBytes % 4 == 0)
|
|
return 4;
|
|
if (TrailingNulls >= 2)
|
|
return 2;
|
|
return 1;
|
|
}
|
|
|
|
// The whole string was not able to be encoded. Try to look at embedded null
|
|
// terminators to guess. The heuristic is that we count all embedded null
|
|
// terminators. If more than 2/3 are null, it's a char32. If more than 1/3
|
|
// are null, it's a char16. Otherwise it's a char8. This obviously isn't
|
|
// perfect and is biased towards languages that have ascii alphabets, but this
|
|
// was always going to be best effort since the encoding is lossy.
|
|
unsigned Nulls = countEmbeddedNulls(StringBytes, NumChars);
|
|
if (Nulls >= 2 * NumChars / 3 && NumBytes % 4 == 0)
|
|
return 4;
|
|
if (Nulls >= NumChars / 3)
|
|
return 2;
|
|
return 1;
|
|
}
|
|
|
|
static unsigned decodeMultiByteChar(const uint8_t *StringBytes,
|
|
unsigned CharIndex, unsigned CharBytes) {
|
|
assert(CharBytes == 1 || CharBytes == 2 || CharBytes == 4);
|
|
unsigned Offset = CharIndex * CharBytes;
|
|
unsigned Result = 0;
|
|
StringBytes = StringBytes + Offset;
|
|
for (unsigned I = 0; I < CharBytes; ++I) {
|
|
unsigned C = static_cast<unsigned>(StringBytes[I]);
|
|
Result |= C << (8 * I);
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
FunctionSymbolNode *Demangler::demangleVcallThunkNode(StringView &MangledName) {
|
|
FunctionSymbolNode *FSN = Arena.alloc<FunctionSymbolNode>();
|
|
VcallThunkIdentifierNode *VTIN = Arena.alloc<VcallThunkIdentifierNode>();
|
|
FSN->Signature = Arena.alloc<ThunkSignatureNode>();
|
|
FSN->Signature->FunctionClass = FC_NoParameterList;
|
|
|
|
FSN->Name = demangleNameScopeChain(MangledName, VTIN);
|
|
if (!Error)
|
|
Error = !MangledName.consumeFront("$B");
|
|
if (!Error)
|
|
VTIN->OffsetInVTable = demangleUnsigned(MangledName);
|
|
if (!Error)
|
|
Error = !MangledName.consumeFront('A');
|
|
if (!Error)
|
|
FSN->Signature->CallConvention = demangleCallingConvention(MangledName);
|
|
return (Error) ? nullptr : FSN;
|
|
}
|
|
|
|
EncodedStringLiteralNode *
|
|
Demangler::demangleStringLiteral(StringView &MangledName) {
|
|
// This function uses goto, so declare all variables up front.
|
|
OutputStream OS;
|
|
StringView CRC;
|
|
uint64_t StringByteSize;
|
|
bool IsWcharT = false;
|
|
bool IsNegative = false;
|
|
size_t CrcEndPos = 0;
|
|
char *ResultBuffer = nullptr;
|
|
|
|
EncodedStringLiteralNode *Result = Arena.alloc<EncodedStringLiteralNode>();
|
|
|
|
// Must happen before the first `goto StringLiteralError`.
|
|
if (!initializeOutputStream(nullptr, nullptr, OS, 1024))
|
|
// FIXME: Propagate out-of-memory as an error?
|
|
std::terminate();
|
|
|
|
// Prefix indicating the beginning of a string literal
|
|
if (!MangledName.consumeFront("@_"))
|
|
goto StringLiteralError;
|
|
if (MangledName.empty())
|
|
goto StringLiteralError;
|
|
|
|
// Char Type (regular or wchar_t)
|
|
switch (MangledName.popFront()) {
|
|
case '1':
|
|
IsWcharT = true;
|
|
DEMANGLE_FALLTHROUGH;
|
|
case '0':
|
|
break;
|
|
default:
|
|
goto StringLiteralError;
|
|
}
|
|
|
|
// Encoded Length
|
|
std::tie(StringByteSize, IsNegative) = demangleNumber(MangledName);
|
|
if (Error || IsNegative || StringByteSize < (IsWcharT ? 2 : 1))
|
|
goto StringLiteralError;
|
|
|
|
// CRC 32 (always 8 characters plus a terminator)
|
|
CrcEndPos = MangledName.find('@');
|
|
if (CrcEndPos == StringView::npos)
|
|
goto StringLiteralError;
|
|
CRC = MangledName.substr(0, CrcEndPos);
|
|
MangledName = MangledName.dropFront(CrcEndPos + 1);
|
|
if (MangledName.empty())
|
|
goto StringLiteralError;
|
|
|
|
if (IsWcharT) {
|
|
Result->Char = CharKind::Wchar;
|
|
if (StringByteSize > 64)
|
|
Result->IsTruncated = true;
|
|
|
|
while (!MangledName.consumeFront('@')) {
|
|
if (MangledName.size() < 2)
|
|
goto StringLiteralError;
|
|
wchar_t W = demangleWcharLiteral(MangledName);
|
|
if (StringByteSize != 2 || Result->IsTruncated)
|
|
outputEscapedChar(OS, W);
|
|
StringByteSize -= 2;
|
|
if (Error)
|
|
goto StringLiteralError;
|
|
}
|
|
} else {
|
|
// The max byte length is actually 32, but some compilers mangled strings
|
|
// incorrectly, so we have to assume it can go higher.
|
|
constexpr unsigned MaxStringByteLength = 32 * 4;
|
|
uint8_t StringBytes[MaxStringByteLength];
|
|
|
|
unsigned BytesDecoded = 0;
|
|
while (!MangledName.consumeFront('@')) {
|
|
if (MangledName.size() < 1 || BytesDecoded >= MaxStringByteLength)
|
|
goto StringLiteralError;
|
|
StringBytes[BytesDecoded++] = demangleCharLiteral(MangledName);
|
|
}
|
|
|
|
if (StringByteSize > BytesDecoded)
|
|
Result->IsTruncated = true;
|
|
|
|
unsigned CharBytes =
|
|
guessCharByteSize(StringBytes, BytesDecoded, StringByteSize);
|
|
assert(StringByteSize % CharBytes == 0);
|
|
switch (CharBytes) {
|
|
case 1:
|
|
Result->Char = CharKind::Char;
|
|
break;
|
|
case 2:
|
|
Result->Char = CharKind::Char16;
|
|
break;
|
|
case 4:
|
|
Result->Char = CharKind::Char32;
|
|
break;
|
|
default:
|
|
DEMANGLE_UNREACHABLE;
|
|
}
|
|
const unsigned NumChars = BytesDecoded / CharBytes;
|
|
for (unsigned CharIndex = 0; CharIndex < NumChars; ++CharIndex) {
|
|
unsigned NextChar =
|
|
decodeMultiByteChar(StringBytes, CharIndex, CharBytes);
|
|
if (CharIndex + 1 < NumChars || Result->IsTruncated)
|
|
outputEscapedChar(OS, NextChar);
|
|
}
|
|
}
|
|
|
|
OS << '\0';
|
|
ResultBuffer = OS.getBuffer();
|
|
Result->DecodedString = copyString(ResultBuffer);
|
|
std::free(ResultBuffer);
|
|
return Result;
|
|
|
|
StringLiteralError:
|
|
Error = true;
|
|
std::free(OS.getBuffer());
|
|
return nullptr;
|
|
}
|
|
|
|
// Returns MangledName's prefix before the first '@', or an error if
|
|
// MangledName contains no '@' or the prefix has length 0.
|
|
StringView Demangler::demangleSimpleString(StringView &MangledName,
|
|
bool Memorize) {
|
|
StringView S;
|
|
for (size_t i = 0; i < MangledName.size(); ++i) {
|
|
if (MangledName[i] != '@')
|
|
continue;
|
|
if (i == 0)
|
|
break;
|
|
S = MangledName.substr(0, i);
|
|
MangledName = MangledName.dropFront(i + 1);
|
|
|
|
if (Memorize)
|
|
memorizeString(S);
|
|
return S;
|
|
}
|
|
|
|
Error = true;
|
|
return {};
|
|
}
|
|
|
|
NamedIdentifierNode *
|
|
Demangler::demangleAnonymousNamespaceName(StringView &MangledName) {
|
|
assert(MangledName.startsWith("?A"));
|
|
MangledName.consumeFront("?A");
|
|
|
|
NamedIdentifierNode *Node = Arena.alloc<NamedIdentifierNode>();
|
|
Node->Name = "`anonymous namespace'";
|
|
size_t EndPos = MangledName.find('@');
|
|
if (EndPos == StringView::npos) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
StringView NamespaceKey = MangledName.substr(0, EndPos);
|
|
memorizeString(NamespaceKey);
|
|
MangledName = MangledName.substr(EndPos + 1);
|
|
return Node;
|
|
}
|
|
|
|
NamedIdentifierNode *
|
|
Demangler::demangleLocallyScopedNamePiece(StringView &MangledName) {
|
|
assert(startsWithLocalScopePattern(MangledName));
|
|
|
|
NamedIdentifierNode *Identifier = Arena.alloc<NamedIdentifierNode>();
|
|
MangledName.consumeFront('?');
|
|
uint64_t Number = 0;
|
|
bool IsNegative = false;
|
|
std::tie(Number, IsNegative) = demangleNumber(MangledName);
|
|
assert(!IsNegative);
|
|
|
|
// One ? to terminate the number
|
|
MangledName.consumeFront('?');
|
|
|
|
assert(!Error);
|
|
Node *Scope = parse(MangledName);
|
|
if (Error)
|
|
return nullptr;
|
|
|
|
// Render the parent symbol's name into a buffer.
|
|
OutputStream OS;
|
|
if (!initializeOutputStream(nullptr, nullptr, OS, 1024))
|
|
// FIXME: Propagate out-of-memory as an error?
|
|
std::terminate();
|
|
OS << '`';
|
|
Scope->output(OS, OF_Default);
|
|
OS << '\'';
|
|
OS << "::`" << Number << "'";
|
|
OS << '\0';
|
|
char *Result = OS.getBuffer();
|
|
Identifier->Name = copyString(Result);
|
|
std::free(Result);
|
|
return Identifier;
|
|
}
|
|
|
|
// Parses a type name in the form of A@B@C@@ which represents C::B::A.
|
|
QualifiedNameNode *
|
|
Demangler::demangleFullyQualifiedTypeName(StringView &MangledName) {
|
|
IdentifierNode *Identifier =
|
|
demangleUnqualifiedTypeName(MangledName, /*Memorize=*/true);
|
|
if (Error)
|
|
return nullptr;
|
|
assert(Identifier);
|
|
|
|
QualifiedNameNode *QN = demangleNameScopeChain(MangledName, Identifier);
|
|
if (Error)
|
|
return nullptr;
|
|
assert(QN);
|
|
return QN;
|
|
}
|
|
|
|
// Parses a symbol name in the form of A@B@C@@ which represents C::B::A.
|
|
// Symbol names have slightly different rules regarding what can appear
|
|
// so we separate out the implementations for flexibility.
|
|
QualifiedNameNode *
|
|
Demangler::demangleFullyQualifiedSymbolName(StringView &MangledName) {
|
|
// This is the final component of a symbol name (i.e. the leftmost component
|
|
// of a mangled name. Since the only possible template instantiation that
|
|
// can appear in this context is a function template, and since those are
|
|
// not saved for the purposes of name backreferences, only backref simple
|
|
// names.
|
|
IdentifierNode *Identifier =
|
|
demangleUnqualifiedSymbolName(MangledName, NBB_Simple);
|
|
if (Error)
|
|
return nullptr;
|
|
|
|
QualifiedNameNode *QN = demangleNameScopeChain(MangledName, Identifier);
|
|
if (Error)
|
|
return nullptr;
|
|
|
|
if (Identifier->kind() == NodeKind::StructorIdentifier) {
|
|
if (QN->Components->Count < 2) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
StructorIdentifierNode *SIN =
|
|
static_cast<StructorIdentifierNode *>(Identifier);
|
|
Node *ClassNode = QN->Components->Nodes[QN->Components->Count - 2];
|
|
SIN->Class = static_cast<IdentifierNode *>(ClassNode);
|
|
}
|
|
assert(QN);
|
|
return QN;
|
|
}
|
|
|
|
IdentifierNode *Demangler::demangleUnqualifiedTypeName(StringView &MangledName,
|
|
bool Memorize) {
|
|
// An inner-most name can be a back-reference, because a fully-qualified name
|
|
// (e.g. Scope + Inner) can contain other fully qualified names inside of
|
|
// them (for example template parameters), and these nested parameters can
|
|
// refer to previously mangled types.
|
|
if (startsWithDigit(MangledName))
|
|
return demangleBackRefName(MangledName);
|
|
|
|
if (MangledName.startsWith("?$"))
|
|
return demangleTemplateInstantiationName(MangledName, NBB_Template);
|
|
|
|
return demangleSimpleName(MangledName, Memorize);
|
|
}
|
|
|
|
IdentifierNode *
|
|
Demangler::demangleUnqualifiedSymbolName(StringView &MangledName,
|
|
NameBackrefBehavior NBB) {
|
|
if (startsWithDigit(MangledName))
|
|
return demangleBackRefName(MangledName);
|
|
if (MangledName.startsWith("?$"))
|
|
return demangleTemplateInstantiationName(MangledName, NBB);
|
|
if (MangledName.startsWith('?'))
|
|
return demangleFunctionIdentifierCode(MangledName);
|
|
return demangleSimpleName(MangledName, /*Memorize=*/(NBB & NBB_Simple) != 0);
|
|
}
|
|
|
|
IdentifierNode *Demangler::demangleNameScopePiece(StringView &MangledName) {
|
|
if (startsWithDigit(MangledName))
|
|
return demangleBackRefName(MangledName);
|
|
|
|
if (MangledName.startsWith("?$"))
|
|
return demangleTemplateInstantiationName(MangledName, NBB_Template);
|
|
|
|
if (MangledName.startsWith("?A"))
|
|
return demangleAnonymousNamespaceName(MangledName);
|
|
|
|
if (startsWithLocalScopePattern(MangledName))
|
|
return demangleLocallyScopedNamePiece(MangledName);
|
|
|
|
return demangleSimpleName(MangledName, /*Memorize=*/true);
|
|
}
|
|
|
|
static NodeArrayNode *nodeListToNodeArray(ArenaAllocator &Arena, NodeList *Head,
|
|
size_t Count) {
|
|
NodeArrayNode *N = Arena.alloc<NodeArrayNode>();
|
|
N->Count = Count;
|
|
N->Nodes = Arena.allocArray<Node *>(Count);
|
|
for (size_t I = 0; I < Count; ++I) {
|
|
N->Nodes[I] = Head->N;
|
|
Head = Head->Next;
|
|
}
|
|
return N;
|
|
}
|
|
|
|
QualifiedNameNode *
|
|
Demangler::demangleNameScopeChain(StringView &MangledName,
|
|
IdentifierNode *UnqualifiedName) {
|
|
NodeList *Head = Arena.alloc<NodeList>();
|
|
|
|
Head->N = UnqualifiedName;
|
|
|
|
size_t Count = 1;
|
|
while (!MangledName.consumeFront("@")) {
|
|
++Count;
|
|
NodeList *NewHead = Arena.alloc<NodeList>();
|
|
NewHead->Next = Head;
|
|
Head = NewHead;
|
|
|
|
if (MangledName.empty()) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
|
|
assert(!Error);
|
|
IdentifierNode *Elem = demangleNameScopePiece(MangledName);
|
|
if (Error)
|
|
return nullptr;
|
|
|
|
Head->N = Elem;
|
|
}
|
|
|
|
QualifiedNameNode *QN = Arena.alloc<QualifiedNameNode>();
|
|
QN->Components = nodeListToNodeArray(Arena, Head, Count);
|
|
return QN;
|
|
}
|
|
|
|
FuncClass Demangler::demangleFunctionClass(StringView &MangledName) {
|
|
switch (MangledName.popFront()) {
|
|
case '9':
|
|
return FuncClass(FC_ExternC | FC_NoParameterList);
|
|
case 'A':
|
|
return FC_Private;
|
|
case 'B':
|
|
return FuncClass(FC_Private | FC_Far);
|
|
case 'C':
|
|
return FuncClass(FC_Private | FC_Static);
|
|
case 'D':
|
|
return FuncClass(FC_Private | FC_Static | FC_Far);
|
|
case 'E':
|
|
return FuncClass(FC_Private | FC_Virtual);
|
|
case 'F':
|
|
return FuncClass(FC_Private | FC_Virtual | FC_Far);
|
|
case 'G':
|
|
return FuncClass(FC_Private | FC_StaticThisAdjust);
|
|
case 'H':
|
|
return FuncClass(FC_Private | FC_StaticThisAdjust | FC_Far);
|
|
case 'I':
|
|
return FuncClass(FC_Protected);
|
|
case 'J':
|
|
return FuncClass(FC_Protected | FC_Far);
|
|
case 'K':
|
|
return FuncClass(FC_Protected | FC_Static);
|
|
case 'L':
|
|
return FuncClass(FC_Protected | FC_Static | FC_Far);
|
|
case 'M':
|
|
return FuncClass(FC_Protected | FC_Virtual);
|
|
case 'N':
|
|
return FuncClass(FC_Protected | FC_Virtual | FC_Far);
|
|
case 'O':
|
|
return FuncClass(FC_Protected | FC_Virtual | FC_StaticThisAdjust);
|
|
case 'P':
|
|
return FuncClass(FC_Protected | FC_Virtual | FC_StaticThisAdjust | FC_Far);
|
|
case 'Q':
|
|
return FuncClass(FC_Public);
|
|
case 'R':
|
|
return FuncClass(FC_Public | FC_Far);
|
|
case 'S':
|
|
return FuncClass(FC_Public | FC_Static);
|
|
case 'T':
|
|
return FuncClass(FC_Public | FC_Static | FC_Far);
|
|
case 'U':
|
|
return FuncClass(FC_Public | FC_Virtual);
|
|
case 'V':
|
|
return FuncClass(FC_Public | FC_Virtual | FC_Far);
|
|
case 'W':
|
|
return FuncClass(FC_Public | FC_Virtual | FC_StaticThisAdjust);
|
|
case 'X':
|
|
return FuncClass(FC_Public | FC_Virtual | FC_StaticThisAdjust | FC_Far);
|
|
case 'Y':
|
|
return FuncClass(FC_Global);
|
|
case 'Z':
|
|
return FuncClass(FC_Global | FC_Far);
|
|
case '$': {
|
|
FuncClass VFlag = FC_VirtualThisAdjust;
|
|
if (MangledName.consumeFront('R'))
|
|
VFlag = FuncClass(VFlag | FC_VirtualThisAdjustEx);
|
|
if (MangledName.empty())
|
|
break;
|
|
switch (MangledName.popFront()) {
|
|
case '0':
|
|
return FuncClass(FC_Private | FC_Virtual | VFlag);
|
|
case '1':
|
|
return FuncClass(FC_Private | FC_Virtual | VFlag | FC_Far);
|
|
case '2':
|
|
return FuncClass(FC_Protected | FC_Virtual | VFlag);
|
|
case '3':
|
|
return FuncClass(FC_Protected | FC_Virtual | VFlag | FC_Far);
|
|
case '4':
|
|
return FuncClass(FC_Public | FC_Virtual | VFlag);
|
|
case '5':
|
|
return FuncClass(FC_Public | FC_Virtual | VFlag | FC_Far);
|
|
}
|
|
}
|
|
}
|
|
|
|
Error = true;
|
|
return FC_Public;
|
|
}
|
|
|
|
CallingConv Demangler::demangleCallingConvention(StringView &MangledName) {
|
|
if (MangledName.empty()) {
|
|
Error = true;
|
|
return CallingConv::None;
|
|
}
|
|
|
|
switch (MangledName.popFront()) {
|
|
case 'A':
|
|
case 'B':
|
|
return CallingConv::Cdecl;
|
|
case 'C':
|
|
case 'D':
|
|
return CallingConv::Pascal;
|
|
case 'E':
|
|
case 'F':
|
|
return CallingConv::Thiscall;
|
|
case 'G':
|
|
case 'H':
|
|
return CallingConv::Stdcall;
|
|
case 'I':
|
|
case 'J':
|
|
return CallingConv::Fastcall;
|
|
case 'M':
|
|
case 'N':
|
|
return CallingConv::Clrcall;
|
|
case 'O':
|
|
case 'P':
|
|
return CallingConv::Eabi;
|
|
case 'Q':
|
|
return CallingConv::Vectorcall;
|
|
}
|
|
|
|
return CallingConv::None;
|
|
}
|
|
|
|
StorageClass Demangler::demangleVariableStorageClass(StringView &MangledName) {
|
|
assert(MangledName.front() >= '0' && MangledName.front() <= '4');
|
|
|
|
switch (MangledName.popFront()) {
|
|
case '0':
|
|
return StorageClass::PrivateStatic;
|
|
case '1':
|
|
return StorageClass::ProtectedStatic;
|
|
case '2':
|
|
return StorageClass::PublicStatic;
|
|
case '3':
|
|
return StorageClass::Global;
|
|
case '4':
|
|
return StorageClass::FunctionLocalStatic;
|
|
}
|
|
DEMANGLE_UNREACHABLE;
|
|
}
|
|
|
|
std::pair<Qualifiers, bool>
|
|
Demangler::demangleQualifiers(StringView &MangledName) {
|
|
if (MangledName.empty()) {
|
|
Error = true;
|
|
return std::make_pair(Q_None, false);
|
|
}
|
|
|
|
switch (MangledName.popFront()) {
|
|
// Member qualifiers
|
|
case 'Q':
|
|
return std::make_pair(Q_None, true);
|
|
case 'R':
|
|
return std::make_pair(Q_Const, true);
|
|
case 'S':
|
|
return std::make_pair(Q_Volatile, true);
|
|
case 'T':
|
|
return std::make_pair(Qualifiers(Q_Const | Q_Volatile), true);
|
|
// Non-Member qualifiers
|
|
case 'A':
|
|
return std::make_pair(Q_None, false);
|
|
case 'B':
|
|
return std::make_pair(Q_Const, false);
|
|
case 'C':
|
|
return std::make_pair(Q_Volatile, false);
|
|
case 'D':
|
|
return std::make_pair(Qualifiers(Q_Const | Q_Volatile), false);
|
|
}
|
|
Error = true;
|
|
return std::make_pair(Q_None, false);
|
|
}
|
|
|
|
// <variable-type> ::= <type> <cvr-qualifiers>
|
|
// ::= <type> <pointee-cvr-qualifiers> # pointers, references
|
|
TypeNode *Demangler::demangleType(StringView &MangledName,
|
|
QualifierMangleMode QMM) {
|
|
Qualifiers Quals = Q_None;
|
|
bool IsMember = false;
|
|
if (QMM == QualifierMangleMode::Mangle) {
|
|
std::tie(Quals, IsMember) = demangleQualifiers(MangledName);
|
|
} else if (QMM == QualifierMangleMode::Result) {
|
|
if (MangledName.consumeFront('?'))
|
|
std::tie(Quals, IsMember) = demangleQualifiers(MangledName);
|
|
}
|
|
|
|
if (MangledName.empty()) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
|
|
TypeNode *Ty = nullptr;
|
|
if (isTagType(MangledName))
|
|
Ty = demangleClassType(MangledName);
|
|
else if (isPointerType(MangledName)) {
|
|
if (isMemberPointer(MangledName, Error))
|
|
Ty = demangleMemberPointerType(MangledName);
|
|
else if (!Error)
|
|
Ty = demanglePointerType(MangledName);
|
|
else
|
|
return nullptr;
|
|
} else if (isArrayType(MangledName))
|
|
Ty = demangleArrayType(MangledName);
|
|
else if (isFunctionType(MangledName)) {
|
|
if (MangledName.consumeFront("$$A8@@"))
|
|
Ty = demangleFunctionType(MangledName, true);
|
|
else {
|
|
assert(MangledName.startsWith("$$A6"));
|
|
MangledName.consumeFront("$$A6");
|
|
Ty = demangleFunctionType(MangledName, false);
|
|
}
|
|
} else if (isCustomType(MangledName)) {
|
|
Ty = demangleCustomType(MangledName);
|
|
} else {
|
|
Ty = demanglePrimitiveType(MangledName);
|
|
}
|
|
|
|
if (!Ty || Error)
|
|
return Ty;
|
|
Ty->Quals = Qualifiers(Ty->Quals | Quals);
|
|
return Ty;
|
|
}
|
|
|
|
bool Demangler::demangleThrowSpecification(StringView &MangledName) {
|
|
if (MangledName.consumeFront("_E"))
|
|
return true;
|
|
if (MangledName.consumeFront('Z'))
|
|
return false;
|
|
|
|
Error = true;
|
|
return false;
|
|
}
|
|
|
|
FunctionSignatureNode *Demangler::demangleFunctionType(StringView &MangledName,
|
|
bool HasThisQuals) {
|
|
FunctionSignatureNode *FTy = Arena.alloc<FunctionSignatureNode>();
|
|
|
|
if (HasThisQuals) {
|
|
FTy->Quals = demanglePointerExtQualifiers(MangledName);
|
|
FTy->RefQualifier = demangleFunctionRefQualifier(MangledName);
|
|
FTy->Quals = Qualifiers(FTy->Quals | demangleQualifiers(MangledName).first);
|
|
}
|
|
|
|
// Fields that appear on both member and non-member functions.
|
|
FTy->CallConvention = demangleCallingConvention(MangledName);
|
|
|
|
// <return-type> ::= <type>
|
|
// ::= @ # structors (they have no declared return type)
|
|
bool IsStructor = MangledName.consumeFront('@');
|
|
if (!IsStructor)
|
|
FTy->ReturnType = demangleType(MangledName, QualifierMangleMode::Result);
|
|
|
|
FTy->Params = demangleFunctionParameterList(MangledName, FTy->IsVariadic);
|
|
|
|
FTy->IsNoexcept = demangleThrowSpecification(MangledName);
|
|
|
|
return FTy;
|
|
}
|
|
|
|
FunctionSymbolNode *
|
|
Demangler::demangleFunctionEncoding(StringView &MangledName) {
|
|
FuncClass ExtraFlags = FC_None;
|
|
if (MangledName.consumeFront("$$J0"))
|
|
ExtraFlags = FC_ExternC;
|
|
|
|
if (MangledName.empty()) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
|
|
FuncClass FC = demangleFunctionClass(MangledName);
|
|
FC = FuncClass(ExtraFlags | FC);
|
|
|
|
FunctionSignatureNode *FSN = nullptr;
|
|
ThunkSignatureNode *TTN = nullptr;
|
|
if (FC & FC_StaticThisAdjust) {
|
|
TTN = Arena.alloc<ThunkSignatureNode>();
|
|
TTN->ThisAdjust.StaticOffset = demangleSigned(MangledName);
|
|
} else if (FC & FC_VirtualThisAdjust) {
|
|
TTN = Arena.alloc<ThunkSignatureNode>();
|
|
if (FC & FC_VirtualThisAdjustEx) {
|
|
TTN->ThisAdjust.VBPtrOffset = demangleSigned(MangledName);
|
|
TTN->ThisAdjust.VBOffsetOffset = demangleSigned(MangledName);
|
|
}
|
|
TTN->ThisAdjust.VtordispOffset = demangleSigned(MangledName);
|
|
TTN->ThisAdjust.StaticOffset = demangleSigned(MangledName);
|
|
}
|
|
|
|
if (FC & FC_NoParameterList) {
|
|
// This is an extern "C" function whose full signature hasn't been mangled.
|
|
// This happens when we need to mangle a local symbol inside of an extern
|
|
// "C" function.
|
|
FSN = Arena.alloc<FunctionSignatureNode>();
|
|
} else {
|
|
bool HasThisQuals = !(FC & (FC_Global | FC_Static));
|
|
FSN = demangleFunctionType(MangledName, HasThisQuals);
|
|
}
|
|
|
|
if (Error)
|
|
return nullptr;
|
|
|
|
if (TTN) {
|
|
*static_cast<FunctionSignatureNode *>(TTN) = *FSN;
|
|
FSN = TTN;
|
|
}
|
|
FSN->FunctionClass = FC;
|
|
|
|
FunctionSymbolNode *Symbol = Arena.alloc<FunctionSymbolNode>();
|
|
Symbol->Signature = FSN;
|
|
return Symbol;
|
|
}
|
|
|
|
CustomTypeNode *Demangler::demangleCustomType(StringView &MangledName) {
|
|
assert(MangledName.startsWith('?'));
|
|
MangledName.popFront();
|
|
|
|
CustomTypeNode *CTN = Arena.alloc<CustomTypeNode>();
|
|
CTN->Identifier = demangleUnqualifiedTypeName(MangledName, /*Memorize=*/true);
|
|
if (!MangledName.consumeFront('@'))
|
|
Error = true;
|
|
if (Error)
|
|
return nullptr;
|
|
return CTN;
|
|
}
|
|
|
|
// Reads a primitive type.
|
|
PrimitiveTypeNode *Demangler::demanglePrimitiveType(StringView &MangledName) {
|
|
if (MangledName.consumeFront("$$T"))
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Nullptr);
|
|
|
|
switch (MangledName.popFront()) {
|
|
case 'X':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Void);
|
|
case 'D':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Char);
|
|
case 'C':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Schar);
|
|
case 'E':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Uchar);
|
|
case 'F':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Short);
|
|
case 'G':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Ushort);
|
|
case 'H':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Int);
|
|
case 'I':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Uint);
|
|
case 'J':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Long);
|
|
case 'K':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Ulong);
|
|
case 'M':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Float);
|
|
case 'N':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Double);
|
|
case 'O':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Ldouble);
|
|
case '_': {
|
|
if (MangledName.empty()) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
switch (MangledName.popFront()) {
|
|
case 'N':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Bool);
|
|
case 'J':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Int64);
|
|
case 'K':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Uint64);
|
|
case 'W':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Wchar);
|
|
case 'Q':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Char8);
|
|
case 'S':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Char16);
|
|
case 'U':
|
|
return Arena.alloc<PrimitiveTypeNode>(PrimitiveKind::Char32);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
|
|
TagTypeNode *Demangler::demangleClassType(StringView &MangledName) {
|
|
TagTypeNode *TT = nullptr;
|
|
|
|
switch (MangledName.popFront()) {
|
|
case 'T':
|
|
TT = Arena.alloc<TagTypeNode>(TagKind::Union);
|
|
break;
|
|
case 'U':
|
|
TT = Arena.alloc<TagTypeNode>(TagKind::Struct);
|
|
break;
|
|
case 'V':
|
|
TT = Arena.alloc<TagTypeNode>(TagKind::Class);
|
|
break;
|
|
case 'W':
|
|
if (!MangledName.consumeFront('4')) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
TT = Arena.alloc<TagTypeNode>(TagKind::Enum);
|
|
break;
|
|
default:
|
|
assert(false);
|
|
}
|
|
|
|
TT->QualifiedName = demangleFullyQualifiedTypeName(MangledName);
|
|
return TT;
|
|
}
|
|
|
|
// <pointer-type> ::= E? <pointer-cvr-qualifiers> <ext-qualifiers> <type>
|
|
// # the E is required for 64-bit non-static pointers
|
|
PointerTypeNode *Demangler::demanglePointerType(StringView &MangledName) {
|
|
PointerTypeNode *Pointer = Arena.alloc<PointerTypeNode>();
|
|
|
|
std::tie(Pointer->Quals, Pointer->Affinity) =
|
|
demanglePointerCVQualifiers(MangledName);
|
|
|
|
if (MangledName.consumeFront("6")) {
|
|
Pointer->Pointee = demangleFunctionType(MangledName, false);
|
|
return Pointer;
|
|
}
|
|
|
|
Qualifiers ExtQuals = demanglePointerExtQualifiers(MangledName);
|
|
Pointer->Quals = Qualifiers(Pointer->Quals | ExtQuals);
|
|
|
|
Pointer->Pointee = demangleType(MangledName, QualifierMangleMode::Mangle);
|
|
return Pointer;
|
|
}
|
|
|
|
PointerTypeNode *Demangler::demangleMemberPointerType(StringView &MangledName) {
|
|
PointerTypeNode *Pointer = Arena.alloc<PointerTypeNode>();
|
|
|
|
std::tie(Pointer->Quals, Pointer->Affinity) =
|
|
demanglePointerCVQualifiers(MangledName);
|
|
assert(Pointer->Affinity == PointerAffinity::Pointer);
|
|
|
|
Qualifiers ExtQuals = demanglePointerExtQualifiers(MangledName);
|
|
Pointer->Quals = Qualifiers(Pointer->Quals | ExtQuals);
|
|
|
|
// isMemberPointer() only returns true if there is at least one character
|
|
// after the qualifiers.
|
|
if (MangledName.consumeFront("8")) {
|
|
Pointer->ClassParent = demangleFullyQualifiedTypeName(MangledName);
|
|
Pointer->Pointee = demangleFunctionType(MangledName, true);
|
|
} else {
|
|
Qualifiers PointeeQuals = Q_None;
|
|
bool IsMember = false;
|
|
std::tie(PointeeQuals, IsMember) = demangleQualifiers(MangledName);
|
|
assert(IsMember || Error);
|
|
Pointer->ClassParent = demangleFullyQualifiedTypeName(MangledName);
|
|
|
|
Pointer->Pointee = demangleType(MangledName, QualifierMangleMode::Drop);
|
|
if (Pointer->Pointee)
|
|
Pointer->Pointee->Quals = PointeeQuals;
|
|
}
|
|
|
|
return Pointer;
|
|
}
|
|
|
|
Qualifiers Demangler::demanglePointerExtQualifiers(StringView &MangledName) {
|
|
Qualifiers Quals = Q_None;
|
|
if (MangledName.consumeFront('E'))
|
|
Quals = Qualifiers(Quals | Q_Pointer64);
|
|
if (MangledName.consumeFront('I'))
|
|
Quals = Qualifiers(Quals | Q_Restrict);
|
|
if (MangledName.consumeFront('F'))
|
|
Quals = Qualifiers(Quals | Q_Unaligned);
|
|
|
|
return Quals;
|
|
}
|
|
|
|
ArrayTypeNode *Demangler::demangleArrayType(StringView &MangledName) {
|
|
assert(MangledName.front() == 'Y');
|
|
MangledName.popFront();
|
|
|
|
uint64_t Rank = 0;
|
|
bool IsNegative = false;
|
|
std::tie(Rank, IsNegative) = demangleNumber(MangledName);
|
|
if (IsNegative || Rank == 0) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
|
|
ArrayTypeNode *ATy = Arena.alloc<ArrayTypeNode>();
|
|
NodeList *Head = Arena.alloc<NodeList>();
|
|
NodeList *Tail = Head;
|
|
|
|
for (uint64_t I = 0; I < Rank; ++I) {
|
|
uint64_t D = 0;
|
|
std::tie(D, IsNegative) = demangleNumber(MangledName);
|
|
if (Error || IsNegative) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
Tail->N = Arena.alloc<IntegerLiteralNode>(D, IsNegative);
|
|
if (I + 1 < Rank) {
|
|
Tail->Next = Arena.alloc<NodeList>();
|
|
Tail = Tail->Next;
|
|
}
|
|
}
|
|
ATy->Dimensions = nodeListToNodeArray(Arena, Head, Rank);
|
|
|
|
if (MangledName.consumeFront("$$C")) {
|
|
bool IsMember = false;
|
|
std::tie(ATy->Quals, IsMember) = demangleQualifiers(MangledName);
|
|
if (IsMember) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
ATy->ElementType = demangleType(MangledName, QualifierMangleMode::Drop);
|
|
return ATy;
|
|
}
|
|
|
|
// Reads a function's parameters.
|
|
NodeArrayNode *Demangler::demangleFunctionParameterList(StringView &MangledName,
|
|
bool &IsVariadic) {
|
|
// Empty parameter list.
|
|
if (MangledName.consumeFront('X'))
|
|
return nullptr;
|
|
|
|
NodeList *Head = Arena.alloc<NodeList>();
|
|
NodeList **Current = &Head;
|
|
size_t Count = 0;
|
|
while (!Error && !MangledName.startsWith('@') &&
|
|
!MangledName.startsWith('Z')) {
|
|
++Count;
|
|
|
|
if (startsWithDigit(MangledName)) {
|
|
size_t N = MangledName[0] - '0';
|
|
if (N >= Backrefs.FunctionParamCount) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
MangledName = MangledName.dropFront();
|
|
|
|
*Current = Arena.alloc<NodeList>();
|
|
(*Current)->N = Backrefs.FunctionParams[N];
|
|
Current = &(*Current)->Next;
|
|
continue;
|
|
}
|
|
|
|
size_t OldSize = MangledName.size();
|
|
|
|
*Current = Arena.alloc<NodeList>();
|
|
TypeNode *TN = demangleType(MangledName, QualifierMangleMode::Drop);
|
|
if (!TN || Error)
|
|
return nullptr;
|
|
|
|
(*Current)->N = TN;
|
|
|
|
size_t CharsConsumed = OldSize - MangledName.size();
|
|
assert(CharsConsumed != 0);
|
|
|
|
// Single-letter types are ignored for backreferences because memorizing
|
|
// them doesn't save anything.
|
|
if (Backrefs.FunctionParamCount <= 9 && CharsConsumed > 1)
|
|
Backrefs.FunctionParams[Backrefs.FunctionParamCount++] = TN;
|
|
|
|
Current = &(*Current)->Next;
|
|
}
|
|
|
|
if (Error)
|
|
return nullptr;
|
|
|
|
NodeArrayNode *NA = nodeListToNodeArray(Arena, Head, Count);
|
|
// A non-empty parameter list is terminated by either 'Z' (variadic) parameter
|
|
// list or '@' (non variadic). Careful not to consume "@Z", as in that case
|
|
// the following Z could be a throw specifier.
|
|
if (MangledName.consumeFront('@'))
|
|
return NA;
|
|
|
|
if (MangledName.consumeFront('Z')) {
|
|
IsVariadic = true;
|
|
return NA;
|
|
}
|
|
|
|
DEMANGLE_UNREACHABLE;
|
|
}
|
|
|
|
NodeArrayNode *
|
|
Demangler::demangleTemplateParameterList(StringView &MangledName) {
|
|
NodeList *Head = nullptr;
|
|
NodeList **Current = &Head;
|
|
size_t Count = 0;
|
|
|
|
while (!MangledName.startsWith('@')) {
|
|
if (MangledName.consumeFront("$S") || MangledName.consumeFront("$$V") ||
|
|
MangledName.consumeFront("$$$V") || MangledName.consumeFront("$$Z")) {
|
|
// parameter pack separator
|
|
continue;
|
|
}
|
|
|
|
++Count;
|
|
|
|
// Template parameter lists don't participate in back-referencing.
|
|
*Current = Arena.alloc<NodeList>();
|
|
|
|
NodeList &TP = **Current;
|
|
|
|
TemplateParameterReferenceNode *TPRN = nullptr;
|
|
if (MangledName.consumeFront("$$Y")) {
|
|
// Template alias
|
|
TP.N = demangleFullyQualifiedTypeName(MangledName);
|
|
} else if (MangledName.consumeFront("$$B")) {
|
|
// Array
|
|
TP.N = demangleType(MangledName, QualifierMangleMode::Drop);
|
|
} else if (MangledName.consumeFront("$$C")) {
|
|
// Type has qualifiers.
|
|
TP.N = demangleType(MangledName, QualifierMangleMode::Mangle);
|
|
} else if (MangledName.startsWith("$1") || MangledName.startsWith("$H") ||
|
|
MangledName.startsWith("$I") || MangledName.startsWith("$J")) {
|
|
// Pointer to member
|
|
TP.N = TPRN = Arena.alloc<TemplateParameterReferenceNode>();
|
|
TPRN->IsMemberPointer = true;
|
|
|
|
MangledName = MangledName.dropFront();
|
|
// 1 - single inheritance <name>
|
|
// H - multiple inheritance <name> <number>
|
|
// I - virtual inheritance <name> <number> <number>
|
|
// J - unspecified inheritance <name> <number> <number> <number>
|
|
char InheritanceSpecifier = MangledName.popFront();
|
|
SymbolNode *S = nullptr;
|
|
if (MangledName.startsWith('?')) {
|
|
S = parse(MangledName);
|
|
if (Error || !S->Name) {
|
|
Error = true;
|
|
return nullptr;
|
|
}
|
|
memorizeIdentifier(S->Name->getUnqualifiedIdentifier());
|
|
}
|
|
|
|
switch (InheritanceSpecifier) {
|
|
case 'J':
|
|
TPRN->ThunkOffsets[TPRN->ThunkOffsetCount++] =
|
|
demangleSigned(MangledName);
|
|
DEMANGLE_FALLTHROUGH;
|
|
case 'I':
|
|
TPRN->ThunkOffsets[TPRN->ThunkOffsetCount++] =
|
|
demangleSigned(MangledName);
|
|
DEMANGLE_FALLTHROUGH;
|
|
case 'H':
|
|
TPRN->ThunkOffsets[TPRN->ThunkOffsetCount++] =
|
|
demangleSigned(MangledName);
|
|
DEMANGLE_FALLTHROUGH;
|
|
case '1':
|
|
break;
|
|
default:
|
|
DEMANGLE_UNREACHABLE;
|
|
}
|
|
TPRN->Affinity = PointerAffinity::Pointer;
|
|
TPRN->Symbol = S;
|
|
} else if (MangledName.startsWith("$E?")) {
|
|
MangledName.consumeFront("$E");
|
|
// Reference to symbol
|
|
TP.N = TPRN = Arena.alloc<TemplateParameterReferenceNode>();
|
|
TPRN->Symbol = parse(MangledName);
|
|
TPRN->Affinity = PointerAffinity::Reference;
|
|
} else if (MangledName.startsWith("$F") || MangledName.startsWith("$G")) {
|
|
TP.N = TPRN = Arena.alloc<TemplateParameterReferenceNode>();
|
|
|
|
// Data member pointer.
|
|
MangledName = MangledName.dropFront();
|
|
char InheritanceSpecifier = MangledName.popFront();
|
|
|
|
switch (InheritanceSpecifier) {
|
|
case 'G':
|
|
TPRN->ThunkOffsets[TPRN->ThunkOffsetCount++] =
|
|
demangleSigned(MangledName);
|
|
DEMANGLE_FALLTHROUGH;
|
|
case 'F':
|
|
TPRN->ThunkOffsets[TPRN->ThunkOffsetCount++] =
|
|
demangleSigned(MangledName);
|
|
TPRN->ThunkOffsets[TPRN->ThunkOffsetCount++] =
|
|
demangleSigned(MangledName);
|
|
break;
|
|
default:
|
|
DEMANGLE_UNREACHABLE;
|
|
}
|
|
TPRN->IsMemberPointer = true;
|
|
|
|
} else if (MangledName.consumeFront("$0")) {
|
|
// Integral non-type template parameter
|
|
bool IsNegative = false;
|
|
uint64_t Value = 0;
|
|
std::tie(Value, IsNegative) = demangleNumber(MangledName);
|
|
|
|
TP.N = Arena.alloc<IntegerLiteralNode>(Value, IsNegative);
|
|
} else {
|
|
TP.N = demangleType(MangledName, QualifierMangleMode::Drop);
|
|
}
|
|
if (Error)
|
|
return nullptr;
|
|
|
|
Current = &TP.Next;
|
|
}
|
|
|
|
// The loop above returns nullptr on Error.
|
|
assert(!Error);
|
|
|
|
// Template parameter lists cannot be variadic, so it can only be terminated
|
|
// by @ (as opposed to 'Z' in the function parameter case).
|
|
assert(MangledName.startsWith('@')); // The above loop exits only on '@'.
|
|
MangledName.consumeFront('@');
|
|
return nodeListToNodeArray(Arena, Head, Count);
|
|
}
|
|
|
|
void Demangler::dumpBackReferences() {
|
|
std::printf("%d function parameter backreferences\n",
|
|
(int)Backrefs.FunctionParamCount);
|
|
|
|
// Create an output stream so we can render each type.
|
|
OutputStream OS;
|
|
if (!initializeOutputStream(nullptr, nullptr, OS, 1024))
|
|
std::terminate();
|
|
for (size_t I = 0; I < Backrefs.FunctionParamCount; ++I) {
|
|
OS.setCurrentPosition(0);
|
|
|
|
TypeNode *T = Backrefs.FunctionParams[I];
|
|
T->output(OS, OF_Default);
|
|
|
|
std::printf(" [%d] - %.*s\n", (int)I, (int)OS.getCurrentPosition(),
|
|
OS.getBuffer());
|
|
}
|
|
std::free(OS.getBuffer());
|
|
|
|
if (Backrefs.FunctionParamCount > 0)
|
|
std::printf("\n");
|
|
std::printf("%d name backreferences\n", (int)Backrefs.NamesCount);
|
|
for (size_t I = 0; I < Backrefs.NamesCount; ++I) {
|
|
std::printf(" [%d] - %.*s\n", (int)I, (int)Backrefs.Names[I]->Name.size(),
|
|
Backrefs.Names[I]->Name.begin());
|
|
}
|
|
if (Backrefs.NamesCount > 0)
|
|
std::printf("\n");
|
|
}
|
|
|
|
char *llvm::microsoftDemangle(const char *MangledName, size_t *NMangled,
|
|
char *Buf, size_t *N,
|
|
int *Status, MSDemangleFlags Flags) {
|
|
Demangler D;
|
|
OutputStream S;
|
|
|
|
StringView Name{MangledName};
|
|
SymbolNode *AST = D.parse(Name);
|
|
if (!D.Error && NMangled)
|
|
*NMangled = Name.begin() - MangledName;
|
|
|
|
if (Flags & MSDF_DumpBackrefs)
|
|
D.dumpBackReferences();
|
|
|
|
OutputFlags OF = OF_Default;
|
|
if (Flags & MSDF_NoCallingConvention)
|
|
OF = OutputFlags(OF | OF_NoCallingConvention);
|
|
if (Flags & MSDF_NoAccessSpecifier)
|
|
OF = OutputFlags(OF | OF_NoAccessSpecifier);
|
|
if (Flags & MSDF_NoReturnType)
|
|
OF = OutputFlags(OF | OF_NoReturnType);
|
|
if (Flags & MSDF_NoMemberType)
|
|
OF = OutputFlags(OF | OF_NoMemberType);
|
|
|
|
int InternalStatus = demangle_success;
|
|
if (D.Error)
|
|
InternalStatus = demangle_invalid_mangled_name;
|
|
else if (!initializeOutputStream(Buf, N, S, 1024))
|
|
InternalStatus = demangle_memory_alloc_failure;
|
|
else {
|
|
AST->output(S, OF);
|
|
S += '\0';
|
|
if (N != nullptr)
|
|
*N = S.getCurrentPosition();
|
|
Buf = S.getBuffer();
|
|
}
|
|
|
|
if (Status)
|
|
*Status = InternalStatus;
|
|
return InternalStatus == demangle_success ? Buf : nullptr;
|
|
}
|