//=- ClangDiagnosticsEmitter.cpp - Generate Clang diagnostics tables -*- C++ -*-
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// These tablegen backends emit Clang diagnostics tables.
//
//===----------------------------------------------------------------------===//
#include "TableGenBackends.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/PointerUnion.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/Casting.h"
#include "llvm/TableGen/Error.h"
#include "llvm/TableGen/Record.h"
#include "llvm/TableGen/StringToOffsetTable.h"
#include "llvm/TableGen/TableGenBackend.h"
#include <algorithm>
#include <cctype>
#include <functional>
#include <map>
#include <set>
using namespace llvm;
//===----------------------------------------------------------------------===//
// Diagnostic category computation code.
//===----------------------------------------------------------------------===//
namespace {
class DiagGroupParentMap {
RecordKeeper &Records;
std::map<const Record*, std::vector<Record*> > Mapping;
public:
DiagGroupParentMap(RecordKeeper &records) : Records(records) {
std::vector<Record*> DiagGroups
= Records.getAllDerivedDefinitions("DiagGroup");
for (unsigned i = 0, e = DiagGroups.size(); i != e; ++i) {
std::vector<Record*> SubGroups =
DiagGroups[i]->getValueAsListOfDefs("SubGroups");
for (unsigned j = 0, e = SubGroups.size(); j != e; ++j)
Mapping[SubGroups[j]].push_back(DiagGroups[i]);
}
}
const std::vector<Record*> &getParents(const Record *Group) {
return Mapping[Group];
}
};
} // end anonymous namespace.
static std::string
getCategoryFromDiagGroup(const Record *Group,
DiagGroupParentMap &DiagGroupParents) {
// If the DiagGroup has a category, return it.
std::string CatName = Group->getValueAsString("CategoryName");
if (!CatName.empty()) return CatName;
// The diag group may the subgroup of one or more other diagnostic groups,
// check these for a category as well.
const std::vector<Record*> &Parents = DiagGroupParents.getParents(Group);
for (unsigned i = 0, e = Parents.size(); i != e; ++i) {
CatName = getCategoryFromDiagGroup(Parents[i], DiagGroupParents);
if (!CatName.empty()) return CatName;
}
return "";
}
/// getDiagnosticCategory - Return the category that the specified diagnostic
/// lives in.
static std::string getDiagnosticCategory(const Record *R,
DiagGroupParentMap &DiagGroupParents) {
// If the diagnostic is in a group, and that group has a category, use it.
if (DefInit *Group = dyn_cast<DefInit>(R->getValueInit("Group"))) {
// Check the diagnostic's diag group for a category.
std::string CatName = getCategoryFromDiagGroup(Group->getDef(),
DiagGroupParents);
if (!CatName.empty()) return CatName;
}
// If the diagnostic itself has a category, get it.
return R->getValueAsString("CategoryName");
}
namespace {
class DiagCategoryIDMap {
RecordKeeper &Records;
StringMap<unsigned> CategoryIDs;
std::vector<std::string> CategoryStrings;
public:
DiagCategoryIDMap(RecordKeeper &records) : Records(records) {
DiagGroupParentMap ParentInfo(Records);
// The zero'th category is "".
CategoryStrings.push_back("");
CategoryIDs[""] = 0;
std::vector<Record*> Diags =
Records.getAllDerivedDefinitions("Diagnostic");
for (unsigned i = 0, e = Diags.size(); i != e; ++i) {
std::string Category = getDiagnosticCategory(Diags[i], ParentInfo);
if (Category.empty()) continue; // Skip diags with no category.
unsigned &ID = CategoryIDs[Category];
if (ID != 0) continue; // Already seen.
ID = CategoryStrings.size();
CategoryStrings.push_back(Category);
}
}
unsigned getID(StringRef CategoryString) {
return CategoryIDs[CategoryString];
}
typedef std::vector<std::string>::const_iterator const_iterator;
const_iterator begin() const { return CategoryStrings.begin(); }
const_iterator end() const { return CategoryStrings.end(); }
};
struct GroupInfo {
std::vector<const Record*> DiagsInGroup;
std::vector<std::string> SubGroups;
unsigned IDNo;
const Record *ExplicitDef;
GroupInfo() : ExplicitDef(nullptr) {}
};
} // end anonymous namespace.
static bool beforeThanCompare(const Record *LHS, const Record *RHS) {
assert(!LHS->getLoc().empty() && !RHS->getLoc().empty());
return
LHS->getLoc().front().getPointer() < RHS->getLoc().front().getPointer();
}
static bool diagGroupBeforeByName(const Record *LHS, const Record *RHS) {
return LHS->getValueAsString("GroupName") <
RHS->getValueAsString("GroupName");
}
static bool beforeThanCompareGroups(const GroupInfo *LHS, const GroupInfo *RHS){
assert(!LHS->DiagsInGroup.empty() && !RHS->DiagsInGroup.empty());
return beforeThanCompare(LHS->DiagsInGroup.front(),
RHS->DiagsInGroup.front());
}
/// Invert the 1-[0/1] mapping of diags to group into a one to many
/// mapping of groups to diags in the group.
static void groupDiagnostics(const std::vector<Record*> &Diags,
const std::vector<Record*> &DiagGroups,
std::map<std::string, GroupInfo> &DiagsInGroup) {
for (unsigned i = 0, e = Diags.size(); i != e; ++i) {
const Record *R = Diags[i];
DefInit *DI = dyn_cast<DefInit>(R->getValueInit("Group"));
if (!DI)
continue;
assert(R->getValueAsDef("Class")->getName() != "CLASS_NOTE" &&
"Note can't be in a DiagGroup");
std::string GroupName = DI->getDef()->getValueAsString("GroupName");
DiagsInGroup[GroupName].DiagsInGroup.push_back(R);
}
typedef SmallPtrSet<GroupInfo *, 16> GroupSetTy;
GroupSetTy ImplicitGroups;
// Add all DiagGroup's to the DiagsInGroup list to make sure we pick up empty
// groups (these are warnings that GCC supports that clang never produces).
for (unsigned i = 0, e = DiagGroups.size(); i != e; ++i) {
Record *Group = DiagGroups[i];
GroupInfo &GI = DiagsInGroup[Group->getValueAsString("GroupName")];
if (Group->isAnonymous()) {
if (GI.DiagsInGroup.size() > 1)
ImplicitGroups.insert(&GI);
} else {
if (GI.ExplicitDef)
assert(GI.ExplicitDef == Group);
else
GI.ExplicitDef = Group;
}
std::vector<Record*> SubGroups = Group->getValueAsListOfDefs("SubGroups");
for (unsigned j = 0, e = SubGroups.size(); j != e; ++j)
GI.SubGroups.push_back(SubGroups[j]->getValueAsString("GroupName"));
}
// Assign unique ID numbers to the groups.
unsigned IDNo = 0;
for (std::map<std::string, GroupInfo>::iterator
I = DiagsInGroup.begin(), E = DiagsInGroup.end(); I != E; ++I, ++IDNo)
I->second.IDNo = IDNo;
// Sort the implicit groups, so we can warn about them deterministically.
SmallVector<GroupInfo *, 16> SortedGroups(ImplicitGroups.begin(),
ImplicitGroups.end());
for (SmallVectorImpl<GroupInfo *>::iterator I = SortedGroups.begin(),
E = SortedGroups.end();
I != E; ++I) {
MutableArrayRef<const Record *> GroupDiags = (*I)->DiagsInGroup;
llvm::sort(GroupDiags, beforeThanCompare);
}
llvm::sort(SortedGroups, beforeThanCompareGroups);
// Warn about the same group being used anonymously in multiple places.
for (SmallVectorImpl<GroupInfo *>::const_iterator I = SortedGroups.begin(),
E = SortedGroups.end();
I != E; ++I) {
ArrayRef<const Record *> GroupDiags = (*I)->DiagsInGroup;
if ((*I)->ExplicitDef) {
std::string Name = (*I)->ExplicitDef->getValueAsString("GroupName");
for (ArrayRef<const Record *>::const_iterator DI = GroupDiags.begin(),
DE = GroupDiags.end();
DI != DE; ++DI) {
const DefInit *GroupInit = cast<DefInit>((*DI)->getValueInit("Group"));
const Record *NextDiagGroup = GroupInit->getDef();
if (NextDiagGroup == (*I)->ExplicitDef)
continue;
SrcMgr.PrintMessage((*DI)->getLoc().front(),
SourceMgr::DK_Error,
Twine("group '") + Name +
"' is referred to anonymously");
SrcMgr.PrintMessage((*I)->ExplicitDef->getLoc().front(),
SourceMgr::DK_Note, "group defined here");
}
} else {
// If there's no existing named group, we should just warn once and use
// notes to list all the other cases.
ArrayRef<const Record *>::const_iterator DI = GroupDiags.begin(),
DE = GroupDiags.end();
assert(DI != DE && "We only care about groups with multiple uses!");
const DefInit *GroupInit = cast<DefInit>((*DI)->getValueInit("Group"));
const Record *NextDiagGroup = GroupInit->getDef();
std::string Name = NextDiagGroup->getValueAsString("GroupName");
SrcMgr.PrintMessage((*DI)->getLoc().front(),
SourceMgr::DK_Error,
Twine("group '") + Name +
"' is referred to anonymously");
for (++DI; DI != DE; ++DI) {
SrcMgr.PrintMessage((*DI)->getLoc().front(),
SourceMgr::DK_Note, "also referenced here");
}
}
}
}
//===----------------------------------------------------------------------===//
// Infer members of -Wpedantic.
//===----------------------------------------------------------------------===//
typedef std::vector<const Record *> RecordVec;
typedef llvm::DenseSet<const Record *> RecordSet;
typedef llvm::PointerUnion<RecordVec*, RecordSet*> VecOrSet;
namespace {
class InferPedantic {
typedef llvm::DenseMap<const Record*,
std::pair<unsigned, Optional<unsigned> > > GMap;
DiagGroupParentMap &DiagGroupParents;
const std::vector<Record*> &Diags;
const std::vector<Record*> DiagGroups;
std::map<std::string, GroupInfo> &DiagsInGroup;
llvm::DenseSet<const Record*> DiagsSet;
GMap GroupCount;
public:
InferPedantic(DiagGroupParentMap &DiagGroupParents,
const std::vector<Record*> &Diags,
const std::vector<Record*> &DiagGroups,
std::map<std::string, GroupInfo> &DiagsInGroup)
: DiagGroupParents(DiagGroupParents),
Diags(Diags),
DiagGroups(DiagGroups),
DiagsInGroup(DiagsInGroup) {}
/// Compute the set of diagnostics and groups that are immediately
/// in -Wpedantic.
void compute(VecOrSet DiagsInPedantic,
VecOrSet GroupsInPedantic);
private:
/// Determine whether a group is a subgroup of another group.
bool isSubGroupOfGroup(const Record *Group,
llvm::StringRef RootGroupName);
/// Determine if the diagnostic is an extension.
bool isExtension(const Record *Diag);
/// Determine if the diagnostic is off by default.
bool isOffByDefault(const Record *Diag);
/// Increment the count for a group, and transitively marked
/// parent groups when appropriate.
void markGroup(const Record *Group);
/// Return true if the diagnostic is in a pedantic group.
bool groupInPedantic(const Record *Group, bool increment = false);
};
} // end anonymous namespace
bool InferPedantic::isSubGroupOfGroup(const Record *Group,
llvm::StringRef GName) {
const std::string &GroupName = Group->getValueAsString("GroupName");
if (GName == GroupName)
return true;
const std::vector<Record*> &Parents = DiagGroupParents.getParents(Group);
for (unsigned i = 0, e = Parents.size(); i != e; ++i)
if (isSubGroupOfGroup(Parents[i], GName))
return true;
return false;
}
/// Determine if the diagnostic is an extension.
bool InferPedantic::isExtension(const Record *Diag) {
const std::string &ClsName = Diag->getValueAsDef("Class")->getName();
return ClsName == "CLASS_EXTENSION";
}
bool InferPedantic::isOffByDefault(const Record *Diag) {
const std::string &DefSeverity =
Diag->getValueAsDef("DefaultSeverity")->getValueAsString("Name");
return DefSeverity == "Ignored";
}
bool InferPedantic::groupInPedantic(const Record *Group, bool increment) {
GMap::mapped_type &V = GroupCount[Group];
// Lazily compute the threshold value for the group count.
if (!V.second.hasValue()) {
const GroupInfo &GI = DiagsInGroup[Group->getValueAsString("GroupName")];
V.second = GI.SubGroups.size() + GI.DiagsInGroup.size();
}
if (increment)
++V.first;
// Consider a group in -Wpendatic IFF if has at least one diagnostic
// or subgroup AND all of those diagnostics and subgroups are covered
// by -Wpedantic via our computation.
return V.first != 0 && V.first == V.second.getValue();
}
void InferPedantic::markGroup(const Record *Group) {
// If all the diagnostics and subgroups have been marked as being
// covered by -Wpedantic, increment the count of parent groups. Once the
// group's count is equal to the number of subgroups and diagnostics in
// that group, we can safely add this group to -Wpedantic.
if (groupInPedantic(Group, /* increment */ true)) {
const std::vector<Record*> &Parents = DiagGroupParents.getParents(Group);
for (unsigned i = 0, e = Parents.size(); i != e; ++i)
markGroup(Parents[i]);
}
}
void InferPedantic::compute(VecOrSet DiagsInPedantic,
VecOrSet GroupsInPedantic) {
// All extensions that are not on by default are implicitly in the
// "pedantic" group. For those that aren't explicitly included in -Wpedantic,
// mark them for consideration to be included in -Wpedantic directly.
for (unsigned i = 0, e = Diags.size(); i != e; ++i) {
Record *R = Diags[i];
if (isExtension(R) && isOffByDefault(R)) {
DiagsSet.insert(R);
if (DefInit *Group = dyn_cast<DefInit>(R->getValueInit("Group"))) {
const Record *GroupRec = Group->getDef();
if (!isSubGroupOfGroup(GroupRec, "pedantic")) {
markGroup(GroupRec);
}
}
}
}
// Compute the set of diagnostics that are directly in -Wpedantic. We
// march through Diags a second time to ensure the results are emitted
// in deterministic order.
for (unsigned i = 0, e = Diags.size(); i != e; ++i) {
Record *R = Diags[i];
if (!DiagsSet.count(R))
continue;
// Check if the group is implicitly in -Wpedantic. If so,
// the diagnostic should not be directly included in the -Wpedantic
// diagnostic group.
if (DefInit *Group = dyn_cast<DefInit>(R->getValueInit("Group")))
if (groupInPedantic(Group->getDef()))
continue;
// The diagnostic is not included in a group that is (transitively) in
// -Wpedantic. Include it in -Wpedantic directly.
if (RecordVec *V = DiagsInPedantic.dyn_cast<RecordVec*>())
V->push_back(R);
else {
DiagsInPedantic.get<RecordSet*>()->insert(R);
}
}
if (!GroupsInPedantic)
return;
// Compute the set of groups that are directly in -Wpedantic. We
// march through the groups to ensure the results are emitted
/// in a deterministc order.
for (unsigned i = 0, ei = DiagGroups.size(); i != ei; ++i) {
Record *Group = DiagGroups[i];
if (!groupInPedantic(Group))
continue;
unsigned ParentsInPedantic = 0;
const std::vector<Record*> &Parents = DiagGroupParents.getParents(Group);
for (unsigned j = 0, ej = Parents.size(); j != ej; ++j) {
if (groupInPedantic(Parents[j]))
++ParentsInPedantic;
}
// If all the parents are in -Wpedantic, this means that this diagnostic
// group will be indirectly included by -Wpedantic already. In that
// case, do not add it directly to -Wpedantic. If the group has no
// parents, obviously it should go into -Wpedantic.
if (Parents.size() > 0 && ParentsInPedantic == Parents.size())
continue;
if (RecordVec *V = GroupsInPedantic.dyn_cast<RecordVec*>())
V->push_back(Group);
else {
GroupsInPedantic.get<RecordSet*>()->insert(Group);
}
}
}
namespace {
enum PieceKind {
MultiPieceClass,
TextPieceClass,
PlaceholderPieceClass,
SelectPieceClass,
PluralPieceClass,
DiffPieceClass,
SubstitutionPieceClass,
};
enum ModifierType {
MT_Unknown,
MT_Placeholder,
MT_Select,
MT_Sub,
MT_Plural,
MT_Diff,
MT_Ordinal,
MT_S,
MT_Q,
MT_ObjCClass,
MT_ObjCInstance,
};
static StringRef getModifierName(ModifierType MT) {
switch (MT) {
case MT_Select:
return "select";
case MT_Sub:
return "sub";
case MT_Diff:
return "diff";
case MT_Plural:
return "plural";
case MT_Ordinal:
return "ordinal";
case MT_S:
return "s";
case MT_Q:
return "q";
case MT_Placeholder:
return "";
case MT_ObjCClass:
return "objcclass";
case MT_ObjCInstance:
return "objcinstance";
case MT_Unknown:
llvm_unreachable("invalid modifier type");
}
// Unhandled case
llvm_unreachable("invalid modifier type");
}
struct Piece {
// This type and its derived classes are move-only.
Piece(PieceKind Kind) : ClassKind(Kind) {}
Piece(Piece const &O) = delete;
Piece &operator=(Piece const &) = delete;
virtual ~Piece() {}
PieceKind getPieceClass() const { return ClassKind; }
static bool classof(const Piece *) { return true; }
private:
PieceKind ClassKind;
};
struct MultiPiece : Piece {
MultiPiece() : Piece(MultiPieceClass) {}
MultiPiece(std::vector<Piece *> Pieces)
: Piece(MultiPieceClass), Pieces(std::move(Pieces)) {}
std::vector<Piece *> Pieces;
static bool classof(const Piece *P) {
return P->getPieceClass() == MultiPieceClass;
}
};
struct TextPiece : Piece {
StringRef Role;
std::string Text;
TextPiece(StringRef Text, StringRef Role = "")
: Piece(TextPieceClass), Role(Role), Text(Text.str()) {}
static bool classof(const Piece *P) {
return P->getPieceClass() == TextPieceClass;
}
};
struct PlaceholderPiece : Piece {
ModifierType Kind;
int Index;
PlaceholderPiece(ModifierType Kind, int Index)
: Piece(PlaceholderPieceClass), Kind(Kind), Index(Index) {}
static bool classof(const Piece *P) {
return P->getPieceClass() == PlaceholderPieceClass;
}
};
struct SelectPiece : Piece {
protected:
SelectPiece(PieceKind Kind, ModifierType ModKind)
: Piece(Kind), ModKind(ModKind) {}
public:
SelectPiece(ModifierType ModKind) : SelectPiece(SelectPieceClass, ModKind) {}
ModifierType ModKind;
std::vector<Piece *> Options;
int Index;
static bool classof(const Piece *P) {
return P->getPieceClass() == SelectPieceClass ||
P->getPieceClass() == PluralPieceClass;
}
};
struct PluralPiece : SelectPiece {
PluralPiece() : SelectPiece(PluralPieceClass, MT_Plural) {}
std::vector<Piece *> OptionPrefixes;
int Index;
static bool classof(const Piece *P) {
return P->getPieceClass() == PluralPieceClass;
}
};
struct DiffPiece : Piece {
DiffPiece() : Piece(DiffPieceClass) {}
Piece *Options[2] = {};
int Indexes[2] = {};
static bool classof(const Piece *P) {
return P->getPieceClass() == DiffPieceClass;
}
};
struct SubstitutionPiece : Piece {
SubstitutionPiece() : Piece(SubstitutionPieceClass) {}
std::string Name;
std::vector<int> Modifiers;
static bool classof(const Piece *P) {
return P->getPieceClass() == SubstitutionPieceClass;
}
};
/// Diagnostic text, parsed into pieces.
struct DiagnosticTextBuilder {
DiagnosticTextBuilder(DiagnosticTextBuilder const &) = delete;
DiagnosticTextBuilder &operator=(DiagnosticTextBuilder const &) = delete;
DiagnosticTextBuilder(RecordKeeper &Records) {
// Build up the list of substitution records.
for (auto *S : Records.getAllDerivedDefinitions("TextSubstitution")) {
EvaluatingRecordGuard Guard(&EvaluatingRecord, S);
Substitutions.try_emplace(
S->getName(), DiagText(*this, S->getValueAsString("Substitution")));
}
// Check that no diagnostic definitions have the same name as a
// substitution.
for (Record *Diag : Records.getAllDerivedDefinitions("Diagnostic")) {
StringRef Name = Diag->getName();
if (Substitutions.count(Name))
llvm::PrintFatalError(
Diag->getLoc(),
"Diagnostic '" + Name +
"' has same name as TextSubstitution definition");
}
}
std::vector<std::string> buildForDocumentation(StringRef Role,
const Record *R);
std::string buildForDefinition(const Record *R);
Piece *getSubstitution(SubstitutionPiece *S) const {
auto It = Substitutions.find(S->Name);
if (It == Substitutions.end())
PrintFatalError("Failed to find substitution with name: " + S->Name);
return It->second.Root;
}
LLVM_ATTRIBUTE_NORETURN void PrintFatalError(llvm::Twine const &Msg) const {
assert(EvaluatingRecord && "not evaluating a record?");
llvm::PrintFatalError(EvaluatingRecord->getLoc(), Msg);
}
private:
struct DiagText {
DiagnosticTextBuilder &Builder;
std::vector<Piece *> AllocatedPieces;
Piece *Root = nullptr;
template <class T, class... Args> T *New(Args &&... args) {
static_assert(std::is_base_of<Piece, T>::value, "must be piece");
T *Mem = new T(std::forward<Args>(args)...);
AllocatedPieces.push_back(Mem);
return Mem;
}
DiagText(DiagnosticTextBuilder &Builder, StringRef Text)
: Builder(Builder), Root(parseDiagText(Text)) {}
Piece *parseDiagText(StringRef &Text, bool Nested = false);
int parseModifier(StringRef &) const;
public:
DiagText(DiagText &&O) noexcept
: Builder(O.Builder), AllocatedPieces(std::move(O.AllocatedPieces)),
Root(O.Root) {
O.Root = nullptr;
}
~DiagText() {
for (Piece *P : AllocatedPieces)
delete P;
}
};
private:
const Record *EvaluatingRecord = nullptr;
struct EvaluatingRecordGuard {
EvaluatingRecordGuard(const Record **Dest, const Record *New)
: Dest(Dest), Old(*Dest) {
*Dest = New;
}
~EvaluatingRecordGuard() { *Dest = Old; }
const Record **Dest;
const Record *Old;
};
StringMap<DiagText> Substitutions;
};
template <class Derived> struct DiagTextVisitor {
using ModifierMappingsType = Optional<std::vector<int>>;
private:
Derived &getDerived() { return static_cast<Derived &>(*this); }
public:
std::vector<int>
getSubstitutionMappings(SubstitutionPiece *P,
const ModifierMappingsType &Mappings) const {
std::vector<int> NewMappings;
for (int Idx : P->Modifiers)
NewMappings.push_back(mapIndex(Idx, Mappings));
return NewMappings;
}
struct SubstitutionContext {
SubstitutionContext(DiagTextVisitor &Visitor, SubstitutionPiece *P)
: Visitor(Visitor) {
Substitution = Visitor.Builder.getSubstitution(P);
OldMappings = std::move(Visitor.ModifierMappings);
std::vector<int> NewMappings =
Visitor.getSubstitutionMappings(P, OldMappings);
Visitor.ModifierMappings = std::move(NewMappings);
}
~SubstitutionContext() {
Visitor.ModifierMappings = std::move(OldMappings);
}
private:
DiagTextVisitor &Visitor;
Optional<std::vector<int>> OldMappings;
public:
Piece *Substitution;
};
public:
DiagTextVisitor(DiagnosticTextBuilder &Builder) : Builder(Builder) {}
void Visit(Piece *P) {
switch (P->getPieceClass()) {
#define CASE(T) \
case T##PieceClass: \
return getDerived().Visit##T(static_cast<T##Piece *>(P))
CASE(Multi);
CASE(Text);
CASE(Placeholder);
CASE(Select);
CASE(Plural);
CASE(Diff);
CASE(Substitution);
#undef CASE
}
}
void VisitSubstitution(SubstitutionPiece *P) {
SubstitutionContext Guard(*this, P);
Visit(Guard.Substitution);
}
int mapIndex(int Idx,
ModifierMappingsType const &ModifierMappings) const {
if (!ModifierMappings)
return Idx;
if (ModifierMappings->size() <= static_cast<unsigned>(Idx))
Builder.PrintFatalError("Modifier value '" + std::to_string(Idx) +
"' is not valid for this mapping (has " +
std::to_string(ModifierMappings->size()) +
" mappings)");
return (*ModifierMappings)[Idx];
}
int mapIndex(int Idx) const {
return mapIndex(Idx, ModifierMappings);
}
protected:
DiagnosticTextBuilder &Builder;
ModifierMappingsType ModifierMappings;
};
void escapeRST(StringRef Str, std::string &Out) {
for (auto K : Str) {
if (StringRef("`*|_[]\\").count(K))
Out.push_back('\\');
Out.push_back(K);
}
}
template <typename It> void padToSameLength(It Begin, It End) {
size_t Width = 0;
for (It I = Begin; I != End; ++I)
Width = std::max(Width, I->size());
for (It I = Begin; I != End; ++I)
(*I) += std::string(Width - I->size(), ' ');
}
template <typename It> void makeTableRows(It Begin, It End) {
if (Begin == End)
return;
padToSameLength(Begin, End);
for (It I = Begin; I != End; ++I)
*I = "|" + *I + "|";
}
void makeRowSeparator(std::string &Str) {
for (char &K : Str)
K = (K == '|' ? '+' : '-');
}
struct DiagTextDocPrinter : DiagTextVisitor<DiagTextDocPrinter> {
using BaseTy = DiagTextVisitor<DiagTextDocPrinter>;
DiagTextDocPrinter(DiagnosticTextBuilder &Builder,
std::vector<std::string> &RST)
: BaseTy(Builder), RST(RST) {}
void gatherNodes(
Piece *OrigP, const ModifierMappingsType &CurrentMappings,
std::vector<std::pair<Piece *, ModifierMappingsType>> &Pieces) const {
if (auto *Sub = dyn_cast<SubstitutionPiece>(OrigP)) {
ModifierMappingsType NewMappings =
getSubstitutionMappings(Sub, CurrentMappings);
return gatherNodes(Builder.getSubstitution(Sub), NewMappings, Pieces);
}
if (auto *MD = dyn_cast<MultiPiece>(OrigP)) {
for (Piece *Node : MD->Pieces)
gatherNodes(Node, CurrentMappings, Pieces);
return;
}
Pieces.push_back(std::make_pair(OrigP, CurrentMappings));
}
void VisitMulti(MultiPiece *P) {
if (P->Pieces.empty()) {
RST.push_back("");
return;
}
if (P->Pieces.size() == 1)
return Visit(P->Pieces[0]);
// Flatten the list of nodes, replacing any substitution pieces with the
// recursively flattened substituted node.
std::vector<std::pair<Piece *, ModifierMappingsType>> Pieces;
gatherNodes(P, ModifierMappings, Pieces);
std::string EmptyLinePrefix;
size_t Start = RST.size();
bool HasMultipleLines = true;
for (const std::pair<Piece *, ModifierMappingsType> &NodePair : Pieces) {
std::vector<std::string> Lines;
DiagTextDocPrinter Visitor{Builder, Lines};
Visitor.ModifierMappings = NodePair.second;
Visitor.Visit(NodePair.first);
if (Lines.empty())
continue;
// We need a vertical separator if either this or the previous piece is a
// multi-line piece, or this is the last piece.
const char *Separator = (Lines.size() > 1 || HasMultipleLines) ? "|" : "";
HasMultipleLines = Lines.size() > 1;
if (Start + Lines.size() > RST.size())
RST.resize(Start + Lines.size(), EmptyLinePrefix);
padToSameLength(Lines.begin(), Lines.end());
for (size_t I = 0; I != Lines.size(); ++I)
RST[Start + I] += Separator + Lines[I];
std::string Empty(Lines[0].size(), ' ');
for (size_t I = Start + Lines.size(); I != RST.size(); ++I)
RST[I] += Separator + Empty;
EmptyLinePrefix += Separator + Empty;
}
for (size_t I = Start; I != RST.size(); ++I)
RST[I] += "|";
EmptyLinePrefix += "|";
makeRowSeparator(EmptyLinePrefix);
RST.insert(RST.begin() + Start, EmptyLinePrefix);
RST.insert(RST.end(), EmptyLinePrefix);
}
void VisitText(TextPiece *P) {
RST.push_back("");
auto &S = RST.back();
StringRef T = P->Text;
while (!T.empty() && T.front() == ' ') {
RST.back() += " |nbsp| ";
T = T.drop_front();
}
std::string Suffix;
while (!T.empty() && T.back() == ' ') {
Suffix += " |nbsp| ";
T = T.drop_back();
}
if (!T.empty()) {
S += ':';
S += P->Role;
S += ":`";
escapeRST(T, S);
S += '`';
}
S += Suffix;
}
void VisitPlaceholder(PlaceholderPiece *P) {
RST.push_back(std::string(":placeholder:`") +
char('A' + mapIndex(P->Index)) + "`");
}
void VisitSelect(SelectPiece *P) {
std::vector<size_t> SeparatorIndexes;
SeparatorIndexes.push_back(RST.size());
RST.emplace_back();
for (auto *O : P->Options) {
Visit(O);
SeparatorIndexes.push_back(RST.size());
RST.emplace_back();
}
makeTableRows(RST.begin() + SeparatorIndexes.front(),
RST.begin() + SeparatorIndexes.back() + 1);
for (size_t I : SeparatorIndexes)
makeRowSeparator(RST[I]);
}
void VisitPlural(PluralPiece *P) { VisitSelect(P); }
void VisitDiff(DiffPiece *P) { Visit(P->Options[1]); }
std::vector<std::string> &RST;
};
struct DiagTextPrinter : DiagTextVisitor<DiagTextPrinter> {
public:
using BaseTy = DiagTextVisitor<DiagTextPrinter>;
DiagTextPrinter(DiagnosticTextBuilder &Builder, std::string &Result)
: BaseTy(Builder), Result(Result) {}
void VisitMulti(MultiPiece *P) {
for (auto *Child : P->Pieces)
Visit(Child);
}
void VisitText(TextPiece *P) { Result += P->Text; }
void VisitPlaceholder(PlaceholderPiece *P) {
Result += "%";
Result += getModifierName(P->Kind);
addInt(mapIndex(P->Index));
}
void VisitSelect(SelectPiece *P) {
Result += "%";
Result += getModifierName(P->ModKind);
if (P->ModKind == MT_Select) {
Result += "{";
for (auto *D : P->Options) {
Visit(D);
Result += '|';
}
if (!P->Options.empty())
Result.erase(--Result.end());
Result += '}';
}
addInt(mapIndex(P->Index));
}
void VisitPlural(PluralPiece *P) {
Result += "%plural{";
assert(P->Options.size() == P->OptionPrefixes.size());
for (unsigned I = 0, End = P->Options.size(); I < End; ++I) {
if (P->OptionPrefixes[I])
Visit(P->OptionPrefixes[I]);
Visit(P->Options[I]);
Result += "|";
}
if (!P->Options.empty())
Result.erase(--Result.end());
Result += '}';
addInt(mapIndex(P->Index));
}
void VisitDiff(DiffPiece *P) {
Result += "%diff{";
Visit(P->Options[0]);
Result += "|";
Visit(P->Options[1]);
Result += "}";
addInt(mapIndex(P->Indexes[0]));
Result += ",";
addInt(mapIndex(P->Indexes[1]));
}
void addInt(int Val) { Result += std::to_string(Val); }
std::string &Result;
};
int DiagnosticTextBuilder::DiagText::parseModifier(StringRef &Text) const {
if (Text.empty() || !isdigit(Text[0]))
Builder.PrintFatalError("expected modifier in diagnostic");
int Val = 0;
do {
Val *= 10;
Val += Text[0] - '0';
Text = Text.drop_front();
} while (!Text.empty() && isdigit(Text[0]));
return Val;
}
Piece *DiagnosticTextBuilder::DiagText::parseDiagText(StringRef &Text,
bool Nested) {
std::vector<Piece *> Parsed;
while (!Text.empty()) {
size_t End = (size_t)-2;
do
End = Nested ? Text.find_first_of("%|}", End + 2)
: Text.find_first_of('%', End + 2);
while (End < Text.size() - 1 && Text[End] == '%' &&
(Text[End + 1] == '%' || Text[End + 1] == '|'));
if (End) {
Parsed.push_back(New<TextPiece>(Text.slice(0, End), "diagtext"));
Text = Text.slice(End, StringRef::npos);
if (Text.empty())
break;
}
if (Text[0] == '|' || Text[0] == '}')
break;
// Drop the '%'.
Text = Text.drop_front();
// Extract the (optional) modifier.
size_t ModLength = Text.find_first_of("0123456789{");
StringRef Modifier = Text.slice(0, ModLength);
Text = Text.slice(ModLength, StringRef::npos);
ModifierType ModType = llvm::StringSwitch<ModifierType>{Modifier}
.Case("select", MT_Select)
.Case("sub", MT_Sub)
.Case("diff", MT_Diff)
.Case("plural", MT_Plural)
.Case("s", MT_S)
.Case("ordinal", MT_Ordinal)
.Case("q", MT_Q)
.Case("objcclass", MT_ObjCClass)
.Case("objcinstance", MT_ObjCInstance)
.Case("", MT_Placeholder)
.Default(MT_Unknown);
switch (ModType) {
case MT_Unknown:
Builder.PrintFatalError("Unknown modifier type: " + Modifier);
case MT_Select: {
SelectPiece *Select = New<SelectPiece>(MT_Select);
do {
Text = Text.drop_front(); // '{' or '|'
Select->Options.push_back(parseDiagText(Text, true));
assert(!Text.empty() && "malformed %select");
} while (Text.front() == '|');
// Drop the trailing '}'.
Text = Text.drop_front(1);
Select->Index = parseModifier(Text);
Parsed.push_back(Select);
continue;
}
case MT_Plural: {
PluralPiece *Plural = New<PluralPiece>();
do {
Text = Text.drop_front(); // '{' or '|'
size_t End = Text.find_first_of(":");
if (End == StringRef::npos)
Builder.PrintFatalError("expected ':' while parsing %plural");
++End;
assert(!Text.empty());
Plural->OptionPrefixes.push_back(
New<TextPiece>(Text.slice(0, End), "diagtext"));
Text = Text.slice(End, StringRef::npos);
Plural->Options.push_back(parseDiagText(Text, true));
assert(!Text.empty() && "malformed %select");
} while (Text.front() == '|');
// Drop the trailing '}'.
Text = Text.drop_front(1);
Plural->Index = parseModifier(Text);
Parsed.push_back(Plural);
continue;
}
case MT_Sub: {
SubstitutionPiece *Sub = New<SubstitutionPiece>();
Text = Text.drop_front(); // '{'
size_t NameSize = Text.find_first_of('}');
assert(NameSize != size_t(-1) && "failed to find the end of the name");
assert(NameSize != 0 && "empty name?");
Sub->Name = Text.substr(0, NameSize).str();
Text = Text.drop_front(NameSize);
Text = Text.drop_front(); // '}'
if (!Text.empty()) {
while (true) {
if (!isdigit(Text[0]))
break;
Sub->Modifiers.push_back(parseModifier(Text));
if (Text.empty() || Text[0] != ',')
break;
Text = Text.drop_front(); // ','
assert(!Text.empty() && isdigit(Text[0]) &&
"expected another modifier");
}
}
Parsed.push_back(Sub);
continue;
}
case MT_Diff: {
DiffPiece *Diff = New<DiffPiece>();
Text = Text.drop_front(); // '{'
Diff->Options[0] = parseDiagText(Text, true);
Text = Text.drop_front(); // '|'
Diff->Options[1] = parseDiagText(Text, true);
Text = Text.drop_front(); // '}'
Diff->Indexes[0] = parseModifier(Text);
Text = Text.drop_front(); // ','
Diff->Indexes[1] = parseModifier(Text);
Parsed.push_back(Diff);
continue;
}
case MT_S: {
SelectPiece *Select = New<SelectPiece>(ModType);
Select->Options.push_back(New<TextPiece>(""));
Select->Options.push_back(New<TextPiece>("s", "diagtext"));
Select->Index = parseModifier(Text);
Parsed.push_back(Select);
continue;
}
case MT_Q:
case MT_Placeholder:
case MT_ObjCClass:
case MT_ObjCInstance:
case MT_Ordinal: {
Parsed.push_back(New<PlaceholderPiece>(ModType, parseModifier(Text)));
continue;
}
}
}
return New<MultiPiece>(Parsed);
}
std::vector<std::string>
DiagnosticTextBuilder::buildForDocumentation(StringRef Severity,
const Record *R) {
EvaluatingRecordGuard Guard(&EvaluatingRecord, R);
StringRef Text = R->getValueAsString("Text");
DiagText D(*this, Text);
TextPiece *Prefix = D.New<TextPiece>(Severity, Severity);
Prefix->Text += ": ";
auto *MP = dyn_cast<MultiPiece>(D.Root);
if (!MP) {
MP = D.New<MultiPiece>();
MP->Pieces.push_back(D.Root);
D.Root = MP;
}
MP->Pieces.insert(MP->Pieces.begin(), Prefix);
std::vector<std::string> Result;
DiagTextDocPrinter{*this, Result}.Visit(D.Root);
return Result;
}
std::string DiagnosticTextBuilder::buildForDefinition(const Record *R) {
EvaluatingRecordGuard Guard(&EvaluatingRecord, R);
StringRef Text = R->getValueAsString("Text");
DiagText D(*this, Text);
std::string Result;
DiagTextPrinter{*this, Result}.Visit(D.Root);
return Result;
}
} // namespace
//===----------------------------------------------------------------------===//
// Warning Tables (.inc file) generation.
//===----------------------------------------------------------------------===//
static bool isError(const Record &Diag) {
const std::string &ClsName = Diag.getValueAsDef("Class")->getName();
return ClsName == "CLASS_ERROR";
}
static bool isRemark(const Record &Diag) {
const std::string &ClsName = Diag.getValueAsDef("Class")->getName();
return ClsName == "CLASS_REMARK";
}
/// ClangDiagsDefsEmitter - The top-level class emits .def files containing
/// declarations of Clang diagnostics.
void clang::EmitClangDiagsDefs(RecordKeeper &Records, raw_ostream &OS,
const std::string &Component) {
// Write the #if guard
if (!Component.empty()) {
std::string ComponentName = StringRef(Component).upper();
OS << "#ifdef " << ComponentName << "START\n";
OS << "__" << ComponentName << "START = DIAG_START_" << ComponentName
<< ",\n";
OS << "#undef " << ComponentName << "START\n";
OS << "#endif\n\n";
}
DiagnosticTextBuilder DiagTextBuilder(Records);
std::vector<Record *> Diags = Records.getAllDerivedDefinitions("Diagnostic");
std::vector<Record*> DiagGroups
= Records.getAllDerivedDefinitions("DiagGroup");
std::map<std::string, GroupInfo> DiagsInGroup;
groupDiagnostics(Diags, DiagGroups, DiagsInGroup);
DiagCategoryIDMap CategoryIDs(Records);
DiagGroupParentMap DGParentMap(Records);
// Compute the set of diagnostics that are in -Wpedantic.
RecordSet DiagsInPedantic;
InferPedantic inferPedantic(DGParentMap, Diags, DiagGroups, DiagsInGroup);
inferPedantic.compute(&DiagsInPedantic, (RecordVec*)nullptr);
for (unsigned i = 0, e = Diags.size(); i != e; ++i) {
const Record &R = *Diags[i];
// Check if this is an error that is accidentally in a warning
// group.
if (isError(R)) {
if (DefInit *Group = dyn_cast<DefInit>(R.getValueInit("Group"))) {
const Record *GroupRec = Group->getDef();
const std::string &GroupName = GroupRec->getValueAsString("GroupName");
PrintFatalError(R.getLoc(), "Error " + R.getName() +
" cannot be in a warning group [" + GroupName + "]");
}
}
// Check that all remarks have an associated diagnostic group.
if (isRemark(R)) {
if (!isa<DefInit>(R.getValueInit("Group"))) {
PrintFatalError(R.getLoc(), "Error " + R.getName() +
" not in any diagnostic group");
}
}
// Filter by component.
if (!Component.empty() && Component != R.getValueAsString("Component"))
continue;
OS << "DIAG(" << R.getName() << ", ";
OS << R.getValueAsDef("Class")->getName();
OS << ", (unsigned)diag::Severity::"
<< R.getValueAsDef("DefaultSeverity")->getValueAsString("Name");
// Description string.
OS << ", \"";
OS.write_escaped(DiagTextBuilder.buildForDefinition(&R)) << '"';
// Warning associated with the diagnostic. This is stored as an index into
// the alphabetically sorted warning table.
if (DefInit *DI = dyn_cast<DefInit>(R.getValueInit("Group"))) {
std::map<std::string, GroupInfo>::iterator I =
DiagsInGroup.find(DI->getDef()->getValueAsString("GroupName"));
assert(I != DiagsInGroup.end());
OS << ", " << I->second.IDNo;
} else if (DiagsInPedantic.count(&R)) {
std::map<std::string, GroupInfo>::iterator I =
DiagsInGroup.find("pedantic");
assert(I != DiagsInGroup.end() && "pedantic group not defined");
OS << ", " << I->second.IDNo;
} else {
OS << ", 0";
}
// SFINAE response.
OS << ", " << R.getValueAsDef("SFINAE")->getName();
// Default warning has no Werror bit.
if (R.getValueAsBit("WarningNoWerror"))
OS << ", true";
else
OS << ", false";
if (R.getValueAsBit("ShowInSystemHeader"))
OS << ", true";
else
OS << ", false";
// Category number.
OS << ", " << CategoryIDs.getID(getDiagnosticCategory(&R, DGParentMap));
OS << ")\n";
}
}
//===----------------------------------------------------------------------===//
// Warning Group Tables generation
//===----------------------------------------------------------------------===//
static std::string getDiagCategoryEnum(llvm::StringRef name) {
if (name.empty())
return "DiagCat_None";
SmallString<256> enumName = llvm::StringRef("DiagCat_");
for (llvm::StringRef::iterator I = name.begin(), E = name.end(); I != E; ++I)
enumName += isalnum(*I) ? *I : '_';
return enumName.str();
}
/// Emit the array of diagnostic subgroups.
///
/// The array of diagnostic subgroups contains for each group a list of its
/// subgroups. The individual lists are separated by '-1'. Groups with no
/// subgroups are skipped.
///
/// \code
/// static const int16_t DiagSubGroups[] = {
/// /* Empty */ -1,
/// /* DiagSubGroup0 */ 142, -1,
/// /* DiagSubGroup13 */ 265, 322, 399, -1
/// }
/// \endcode
///
static void emitDiagSubGroups(std::map<std::string, GroupInfo> &DiagsInGroup,
RecordVec &GroupsInPedantic, raw_ostream &OS) {
OS << "static const int16_t DiagSubGroups[] = {\n"
<< " /* Empty */ -1,\n";
for (auto const &I : DiagsInGroup) {
const bool IsPedantic = I.first == "pedantic";
const std::vector<std::string> &SubGroups = I.second.SubGroups;
if (!SubGroups.empty() || (IsPedantic && !GroupsInPedantic.empty())) {
OS << " /* DiagSubGroup" << I.second.IDNo << " */ ";
for (auto const &SubGroup : SubGroups) {
std::map<std::string, GroupInfo>::const_iterator RI =
DiagsInGroup.find(SubGroup);
assert(RI != DiagsInGroup.end() && "Referenced without existing?");
OS << RI->second.IDNo << ", ";
}
// Emit the groups implicitly in "pedantic".
if (IsPedantic) {
for (auto const &Group : GroupsInPedantic) {
const std::string &GroupName = Group->getValueAsString("GroupName");
std::map<std::string, GroupInfo>::const_iterator RI =
DiagsInGroup.find(GroupName);
assert(RI != DiagsInGroup.end() && "Referenced without existing?");
OS << RI->second.IDNo << ", ";
}
}
OS << "-1,\n";
}
}
OS << "};\n\n";
}
/// Emit the list of diagnostic arrays.
///
/// This data structure is a large array that contains itself arrays of varying
/// size. Each array represents a list of diagnostics. The different arrays are
/// separated by the value '-1'.
///
/// \code
/// static const int16_t DiagArrays[] = {
/// /* Empty */ -1,
/// /* DiagArray1 */ diag::warn_pragma_message,
/// -1,
/// /* DiagArray2 */ diag::warn_abs_too_small,
/// diag::warn_unsigned_abs,
/// diag::warn_wrong_absolute_value_type,
/// -1
/// };
/// \endcode
///
static void emitDiagArrays(std::map<std::string, GroupInfo> &DiagsInGroup,
RecordVec &DiagsInPedantic, raw_ostream &OS) {
OS << "static const int16_t DiagArrays[] = {\n"
<< " /* Empty */ -1,\n";
for (auto const &I : DiagsInGroup) {
const bool IsPedantic = I.first == "pedantic";
const std::vector<const Record *> &V = I.second.DiagsInGroup;
if (!V.empty() || (IsPedantic && !DiagsInPedantic.empty())) {
OS << " /* DiagArray" << I.second.IDNo << " */ ";
for (auto *Record : V)
OS << "diag::" << Record->getName() << ", ";
// Emit the diagnostics implicitly in "pedantic".
if (IsPedantic) {
for (auto const &Diag : DiagsInPedantic)
OS << "diag::" << Diag->getName() << ", ";
}
OS << "-1,\n";
}
}
OS << "};\n\n";
}
/// Emit a list of group names.
///
/// This creates a long string which by itself contains a list of pascal style
/// strings, which consist of a length byte directly followed by the string.
///
/// \code
/// static const char DiagGroupNames[] = {
/// \000\020#pragma-messages\t#warnings\020CFString-literal"
/// };
/// \endcode
static void emitDiagGroupNames(StringToOffsetTable &GroupNames,
raw_ostream &OS) {
OS << "static const char DiagGroupNames[] = {\n";
GroupNames.EmitString(OS);
OS << "};\n\n";
}
/// Emit diagnostic arrays and related data structures.
///
/// This creates the actual diagnostic array, an array of diagnostic subgroups
/// and an array of subgroup names.
///
/// \code
/// #ifdef GET_DIAG_ARRAYS
/// static const int16_t DiagArrays[];
/// static const int16_t DiagSubGroups[];
/// static const char DiagGroupNames[];
/// #endif
/// \endcode
static void emitAllDiagArrays(std::map<std::string, GroupInfo> &DiagsInGroup,
RecordVec &DiagsInPedantic,
RecordVec &GroupsInPedantic,
StringToOffsetTable &GroupNames,
raw_ostream &OS) {
OS << "\n#ifdef GET_DIAG_ARRAYS\n";
emitDiagArrays(DiagsInGroup, DiagsInPedantic, OS);
emitDiagSubGroups(DiagsInGroup, GroupsInPedantic, OS);
emitDiagGroupNames(GroupNames, OS);
OS << "#endif // GET_DIAG_ARRAYS\n\n";
}
/// Emit diagnostic table.
///
/// The table is sorted by the name of the diagnostic group. Each element
/// consists of the name of the diagnostic group (given as offset in the
/// group name table), a reference to a list of diagnostics (optional) and a
/// reference to a set of subgroups (optional).
///
/// \code
/// #ifdef GET_DIAG_TABLE
/// {/* abi */ 159, /* DiagArray11 */ 19, /* Empty */ 0},
/// {/* aggregate-return */ 180, /* Empty */ 0, /* Empty */ 0},
/// {/* all */ 197, /* Empty */ 0, /* DiagSubGroup13 */ 3},
/// {/* deprecated */ 1981,/* DiagArray1 */ 348, /* DiagSubGroup3 */ 9},
/// #endif
/// \endcode
static void emitDiagTable(std::map<std::string, GroupInfo> &DiagsInGroup,
RecordVec &DiagsInPedantic,
RecordVec &GroupsInPedantic,
StringToOffsetTable &GroupNames, raw_ostream &OS) {
unsigned MaxLen = 0;
for (auto const &I: DiagsInGroup)
MaxLen = std::max(MaxLen, (unsigned)I.first.size());
OS << "\n#ifdef GET_DIAG_TABLE\n";
unsigned SubGroupIndex = 1, DiagArrayIndex = 1;
for (auto const &I: DiagsInGroup) {
// Group option string.
OS << " { /* ";
if (I.first.find_first_not_of("abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"0123456789!@#$%^*-+=:?") !=
std::string::npos)
PrintFatalError("Invalid character in diagnostic group '" + I.first +
"'");
OS << I.first << " */ " << std::string(MaxLen - I.first.size(), ' ');
// Store a pascal-style length byte at the beginning of the string.
std::string Name = char(I.first.size()) + I.first;
OS << GroupNames.GetOrAddStringOffset(Name, false) << ", ";
// Special handling for 'pedantic'.
const bool IsPedantic = I.first == "pedantic";
// Diagnostics in the group.
const std::vector<const Record *> &V = I.second.DiagsInGroup;
const bool hasDiags =
!V.empty() || (IsPedantic && !DiagsInPedantic.empty());
if (hasDiags) {
OS << "/* DiagArray" << I.second.IDNo << " */ " << DiagArrayIndex
<< ", ";
if (IsPedantic)
DiagArrayIndex += DiagsInPedantic.size();
DiagArrayIndex += V.size() + 1;
} else {
OS << "/* Empty */ 0, ";
}
// Subgroups.
const std::vector<std::string> &SubGroups = I.second.SubGroups;
const bool hasSubGroups =
!SubGroups.empty() || (IsPedantic && !GroupsInPedantic.empty());
if (hasSubGroups) {
OS << "/* DiagSubGroup" << I.second.IDNo << " */ " << SubGroupIndex;
if (IsPedantic)
SubGroupIndex += GroupsInPedantic.size();
SubGroupIndex += SubGroups.size() + 1;
} else {
OS << "/* Empty */ 0";
}
OS << " },\n";
}
OS << "#endif // GET_DIAG_TABLE\n\n";
}
/// Emit the table of diagnostic categories.
///
/// The table has the form of macro calls that have two parameters. The
/// category's name as well as an enum that represents the category. The
/// table can be used by defining the macro 'CATEGORY' and including this
/// table right after.
///
/// \code
/// #ifdef GET_CATEGORY_TABLE
/// CATEGORY("Semantic Issue", DiagCat_Semantic_Issue)
/// CATEGORY("Lambda Issue", DiagCat_Lambda_Issue)
/// #endif
/// \endcode
static void emitCategoryTable(RecordKeeper &Records, raw_ostream &OS) {
DiagCategoryIDMap CategoriesByID(Records);
OS << "\n#ifdef GET_CATEGORY_TABLE\n";
for (auto const &C : CategoriesByID)
OS << "CATEGORY(\"" << C << "\", " << getDiagCategoryEnum(C) << ")\n";
OS << "#endif // GET_CATEGORY_TABLE\n\n";
}
void clang::EmitClangDiagGroups(RecordKeeper &Records, raw_ostream &OS) {
// Compute a mapping from a DiagGroup to all of its parents.
DiagGroupParentMap DGParentMap(Records);
std::vector<Record *> Diags = Records.getAllDerivedDefinitions("Diagnostic");
std::vector<Record *> DiagGroups =
Records.getAllDerivedDefinitions("DiagGroup");
std::map<std::string, GroupInfo> DiagsInGroup;
groupDiagnostics(Diags, DiagGroups, DiagsInGroup);
// All extensions are implicitly in the "pedantic" group. Record the
// implicit set of groups in the "pedantic" group, and use this information
// later when emitting the group information for Pedantic.
RecordVec DiagsInPedantic;
RecordVec GroupsInPedantic;
InferPedantic inferPedantic(DGParentMap, Diags, DiagGroups, DiagsInGroup);
inferPedantic.compute(&DiagsInPedantic, &GroupsInPedantic);
StringToOffsetTable GroupNames;
for (std::map<std::string, GroupInfo>::const_iterator
I = DiagsInGroup.begin(),
E = DiagsInGroup.end();
I != E; ++I) {
// Store a pascal-style length byte at the beginning of the string.
std::string Name = char(I->first.size()) + I->first;
GroupNames.GetOrAddStringOffset(Name, false);
}
emitAllDiagArrays(DiagsInGroup, DiagsInPedantic, GroupsInPedantic, GroupNames,
OS);
emitDiagTable(DiagsInGroup, DiagsInPedantic, GroupsInPedantic, GroupNames,
OS);
emitCategoryTable(Records, OS);
}
//===----------------------------------------------------------------------===//
// Diagnostic name index generation
//===----------------------------------------------------------------------===//
namespace {
struct RecordIndexElement
{
RecordIndexElement() {}
explicit RecordIndexElement(Record const &R):
Name(R.getName()) {}
std::string Name;
};
} // end anonymous namespace.
void clang::EmitClangDiagsIndexName(RecordKeeper &Records, raw_ostream &OS) {
const std::vector<Record*> &Diags =
Records.getAllDerivedDefinitions("Diagnostic");
std::vector<RecordIndexElement> Index;
Index.reserve(Diags.size());
for (unsigned i = 0, e = Diags.size(); i != e; ++i) {
const Record &R = *(Diags[i]);
Index.push_back(RecordIndexElement(R));
}
llvm::sort(Index,
[](const RecordIndexElement &Lhs, const RecordIndexElement &Rhs) {
return Lhs.Name < Rhs.Name;
});
for (unsigned i = 0, e = Index.size(); i != e; ++i) {
const RecordIndexElement &R = Index[i];
OS << "DIAG_NAME_INDEX(" << R.Name << ")\n";
}
}
//===----------------------------------------------------------------------===//
// Diagnostic documentation generation
//===----------------------------------------------------------------------===//
namespace docs {
namespace {
bool isRemarkGroup(const Record *DiagGroup,
const std::map<std::string, GroupInfo> &DiagsInGroup) {
bool AnyRemarks = false, AnyNonRemarks = false;
std::function<void(StringRef)> Visit = [&](StringRef GroupName) {
auto &GroupInfo = DiagsInGroup.find(GroupName)->second;
for (const Record *Diag : GroupInfo.DiagsInGroup)
(isRemark(*Diag) ? AnyRemarks : AnyNonRemarks) = true;
for (const auto &Name : GroupInfo.SubGroups)
Visit(Name);
};
Visit(DiagGroup->getValueAsString("GroupName"));
if (AnyRemarks && AnyNonRemarks)
PrintFatalError(
DiagGroup->getLoc(),
"Diagnostic group contains both remark and non-remark diagnostics");
return AnyRemarks;
}
std::string getDefaultSeverity(const Record *Diag) {
return Diag->getValueAsDef("DefaultSeverity")->getValueAsString("Name");
}
std::set<std::string>
getDefaultSeverities(const Record *DiagGroup,
const std::map<std::string, GroupInfo> &DiagsInGroup) {
std::set<std::string> States;
std::function<void(StringRef)> Visit = [&](StringRef GroupName) {
auto &GroupInfo = DiagsInGroup.find(GroupName)->second;
for (const Record *Diag : GroupInfo.DiagsInGroup)
States.insert(getDefaultSeverity(Diag));
for (const auto &Name : GroupInfo.SubGroups)
Visit(Name);
};
Visit(DiagGroup->getValueAsString("GroupName"));
return States;
}
void writeHeader(StringRef Str, raw_ostream &OS, char Kind = '-') {
OS << Str << "\n" << std::string(Str.size(), Kind) << "\n";
}
void writeDiagnosticText(DiagnosticTextBuilder &Builder, const Record *R,
StringRef Role, raw_ostream &OS) {
StringRef Text = R->getValueAsString("Text");
if (Text == "%0")
OS << "The text of this diagnostic is not controlled by Clang.\n\n";
else {
std::vector<std::string> Out = Builder.buildForDocumentation(Role, R);
for (auto &Line : Out)
OS << Line << "\n";
OS << "\n";
}
}
} // namespace
} // namespace docs
void clang::EmitClangDiagDocs(RecordKeeper &Records, raw_ostream &OS) {
using namespace docs;
// Get the documentation introduction paragraph.
const Record *Documentation = Records.getDef("GlobalDocumentation");
if (!Documentation) {
PrintFatalError("The Documentation top-level definition is missing, "
"no documentation will be generated.");
return;
}
OS << Documentation->getValueAsString("Intro") << "\n";
DiagnosticTextBuilder Builder(Records);
std::vector<Record*> Diags =
Records.getAllDerivedDefinitions("Diagnostic");
std::vector<Record*> DiagGroups =
Records.getAllDerivedDefinitions("DiagGroup");
llvm::sort(DiagGroups, diagGroupBeforeByName);
DiagGroupParentMap DGParentMap(Records);
std::map<std::string, GroupInfo> DiagsInGroup;
groupDiagnostics(Diags, DiagGroups, DiagsInGroup);
// Compute the set of diagnostics that are in -Wpedantic.
{
RecordSet DiagsInPedanticSet;
RecordSet GroupsInPedanticSet;
InferPedantic inferPedantic(DGParentMap, Diags, DiagGroups, DiagsInGroup);
inferPedantic.compute(&DiagsInPedanticSet, &GroupsInPedanticSet);
auto &PedDiags = DiagsInGroup["pedantic"];
// Put the diagnostics into a deterministic order.
RecordVec DiagsInPedantic(DiagsInPedanticSet.begin(),
DiagsInPedanticSet.end());
RecordVec GroupsInPedantic(GroupsInPedanticSet.begin(),
GroupsInPedanticSet.end());
llvm::sort(DiagsInPedantic, beforeThanCompare);
llvm::sort(GroupsInPedantic, beforeThanCompare);
PedDiags.DiagsInGroup.insert(PedDiags.DiagsInGroup.end(),
DiagsInPedantic.begin(),
DiagsInPedantic.end());
for (auto *Group : GroupsInPedantic)
PedDiags.SubGroups.push_back(Group->getValueAsString("GroupName"));
}
// FIXME: Write diagnostic categories and link to diagnostic groups in each.
// Write out the diagnostic groups.
for (const Record *G : DiagGroups) {
bool IsRemarkGroup = isRemarkGroup(G, DiagsInGroup);
auto &GroupInfo = DiagsInGroup[G->getValueAsString("GroupName")];
bool IsSynonym = GroupInfo.DiagsInGroup.empty() &&
GroupInfo.SubGroups.size() == 1;
writeHeader(((IsRemarkGroup ? "-R" : "-W") +
G->getValueAsString("GroupName")).str(),
OS);
if (!IsSynonym) {
// FIXME: Ideally, all the diagnostics in a group should have the same
// default state, but that is not currently the case.
auto DefaultSeverities = getDefaultSeverities(G, DiagsInGroup);
if (!DefaultSeverities.empty() && !DefaultSeverities.count("Ignored")) {
bool AnyNonErrors = DefaultSeverities.count("Warning") ||
DefaultSeverities.count("Remark");
if (!AnyNonErrors)
OS << "This diagnostic is an error by default, but the flag ``-Wno-"
<< G->getValueAsString("GroupName") << "`` can be used to disable "
<< "the error.\n\n";
else
OS << "This diagnostic is enabled by default.\n\n";
} else if (DefaultSeverities.size() > 1) {
OS << "Some of the diagnostics controlled by this flag are enabled "
<< "by default.\n\n";
}
}
if (!GroupInfo.SubGroups.empty()) {
if (IsSynonym)
OS << "Synonym for ";
else if (GroupInfo.DiagsInGroup.empty())
OS << "Controls ";
else
OS << "Also controls ";
bool First = true;
llvm::sort(GroupInfo.SubGroups);
for (const auto &Name : GroupInfo.SubGroups) {
if (!First) OS << ", ";
OS << "`" << (IsRemarkGroup ? "-R" : "-W") << Name << "`_";
First = false;
}
OS << ".\n\n";
}
if (!GroupInfo.DiagsInGroup.empty()) {
OS << "**Diagnostic text:**\n\n";
for (const Record *D : GroupInfo.DiagsInGroup) {
auto Severity = getDefaultSeverity(D);
Severity[0] = tolower(Severity[0]);
if (Severity == "ignored")
Severity = IsRemarkGroup ? "remark" : "warning";
writeDiagnosticText(Builder, D, Severity, OS);
}
}
auto Doc = G->getValueAsString("Documentation");
if (!Doc.empty())
OS << Doc;
else if (GroupInfo.SubGroups.empty() && GroupInfo.DiagsInGroup.empty())
OS << "This diagnostic flag exists for GCC compatibility, and has no "
"effect in Clang.\n";
OS << "\n";
}
}
