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llvm-project/clang/lib/Basic/DiagnosticIDs.cpp

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//===--- DiagnosticIDs.cpp - Diagnostic IDs Handling ----------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file implements the Diagnostic IDs-related interfaces.
//
//===----------------------------------------------------------------------===//
#include "clang/Basic/DiagnosticIDs.h"
#include "clang/Basic/AllDiagnostics.h"
#include "clang/Basic/DiagnosticCategories.h"
#include "clang/Basic/SourceManager.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/ErrorHandling.h"
#include <map>
using namespace clang;
//===----------------------------------------------------------------------===//
// Builtin Diagnostic information
//===----------------------------------------------------------------------===//
namespace {
struct StaticDiagInfoRec;
// Store the descriptions in a separate table to avoid pointers that need to
// be relocated, and also decrease the amount of data needed on 64-bit
// platforms. See "How To Write Shared Libraries" by Ulrich Drepper.
struct StaticDiagInfoDescriptionStringTable {
#define DIAG(ENUM, CLASS, DEFAULT_SEVERITY, DESC, GROUP, SFINAE, NOWERROR, \
SHOWINSYSHEADER, DEFERRABLE, CATEGORY) \
char ENUM##_desc[sizeof(DESC)];
// clang-format off
#include "clang/Basic/DiagnosticCommonKinds.inc"
#include "clang/Basic/DiagnosticDriverKinds.inc"
#include "clang/Basic/DiagnosticFrontendKinds.inc"
#include "clang/Basic/DiagnosticSerializationKinds.inc"
#include "clang/Basic/DiagnosticLexKinds.inc"
#include "clang/Basic/DiagnosticParseKinds.inc"
#include "clang/Basic/DiagnosticASTKinds.inc"
#include "clang/Basic/DiagnosticCommentKinds.inc"
#include "clang/Basic/DiagnosticCrossTUKinds.inc"
#include "clang/Basic/DiagnosticSemaKinds.inc"
#include "clang/Basic/DiagnosticAnalysisKinds.inc"
#include "clang/Basic/DiagnosticRefactoringKinds.inc"
// clang-format on
#undef DIAG
};
const StaticDiagInfoDescriptionStringTable StaticDiagInfoDescriptions = {
#define DIAG(ENUM, CLASS, DEFAULT_SEVERITY, DESC, GROUP, SFINAE, NOWERROR, \
SHOWINSYSHEADER, DEFERRABLE, CATEGORY) \
DESC,
// clang-format off
#include "clang/Basic/DiagnosticCommonKinds.inc"
#include "clang/Basic/DiagnosticDriverKinds.inc"
#include "clang/Basic/DiagnosticFrontendKinds.inc"
#include "clang/Basic/DiagnosticSerializationKinds.inc"
#include "clang/Basic/DiagnosticLexKinds.inc"
#include "clang/Basic/DiagnosticParseKinds.inc"
#include "clang/Basic/DiagnosticASTKinds.inc"
#include "clang/Basic/DiagnosticCommentKinds.inc"
#include "clang/Basic/DiagnosticCrossTUKinds.inc"
#include "clang/Basic/DiagnosticSemaKinds.inc"
#include "clang/Basic/DiagnosticAnalysisKinds.inc"
#include "clang/Basic/DiagnosticRefactoringKinds.inc"
// clang-format on
#undef DIAG
};
extern const StaticDiagInfoRec StaticDiagInfo[];
// Stored separately from StaticDiagInfoRec to pack better. Otherwise,
// StaticDiagInfoRec would have extra padding on 64-bit platforms.
const uint32_t StaticDiagInfoDescriptionOffsets[] = {
#define DIAG(ENUM, CLASS, DEFAULT_SEVERITY, DESC, GROUP, SFINAE, NOWERROR, \
SHOWINSYSHEADER, DEFERRABLE, CATEGORY) \
offsetof(StaticDiagInfoDescriptionStringTable, ENUM##_desc),
// clang-format off
#include "clang/Basic/DiagnosticCommonKinds.inc"
#include "clang/Basic/DiagnosticDriverKinds.inc"
#include "clang/Basic/DiagnosticFrontendKinds.inc"
#include "clang/Basic/DiagnosticSerializationKinds.inc"
#include "clang/Basic/DiagnosticLexKinds.inc"
#include "clang/Basic/DiagnosticParseKinds.inc"
#include "clang/Basic/DiagnosticASTKinds.inc"
#include "clang/Basic/DiagnosticCommentKinds.inc"
#include "clang/Basic/DiagnosticCrossTUKinds.inc"
#include "clang/Basic/DiagnosticSemaKinds.inc"
#include "clang/Basic/DiagnosticAnalysisKinds.inc"
#include "clang/Basic/DiagnosticRefactoringKinds.inc"
// clang-format on
#undef DIAG
};
// Diagnostic classes.
enum {
CLASS_NOTE = 0x01,
CLASS_REMARK = 0x02,
CLASS_WARNING = 0x03,
CLASS_EXTENSION = 0x04,
CLASS_ERROR = 0x05
};
struct StaticDiagInfoRec {
uint16_t DiagID;
unsigned DefaultSeverity : 3;
unsigned Class : 3;
unsigned SFINAE : 2;
unsigned WarnNoWerror : 1;
unsigned WarnShowInSystemHeader : 1;
unsigned Deferrable : 1;
unsigned Category : 6;
uint16_t OptionGroupIndex;
uint16_t DescriptionLen;
unsigned getOptionGroupIndex() const {
return OptionGroupIndex;
}
StringRef getDescription() const {
size_t MyIndex = this - &StaticDiagInfo[0];
uint32_t StringOffset = StaticDiagInfoDescriptionOffsets[MyIndex];
const char* Table = reinterpret_cast<const char*>(&StaticDiagInfoDescriptions);
return StringRef(&Table[StringOffset], DescriptionLen);
}
diag::Flavor getFlavor() const {
return Class == CLASS_REMARK ? diag::Flavor::Remark
: diag::Flavor::WarningOrError;
}
bool operator<(const StaticDiagInfoRec &RHS) const {
return DiagID < RHS.DiagID;
}
};
#define STRINGIFY_NAME(NAME) #NAME
#define VALIDATE_DIAG_SIZE(NAME) \
static_assert( \
static_cast<unsigned>(diag::NUM_BUILTIN_##NAME##_DIAGNOSTICS) < \
static_cast<unsigned>(diag::DIAG_START_##NAME) + \
static_cast<unsigned>(diag::DIAG_SIZE_##NAME), \
STRINGIFY_NAME( \
DIAG_SIZE_##NAME) " is insufficient to contain all " \
"diagnostics, it may need to be made larger in " \
"DiagnosticIDs.h.");
VALIDATE_DIAG_SIZE(COMMON)
VALIDATE_DIAG_SIZE(DRIVER)
VALIDATE_DIAG_SIZE(FRONTEND)
VALIDATE_DIAG_SIZE(SERIALIZATION)
VALIDATE_DIAG_SIZE(LEX)
VALIDATE_DIAG_SIZE(PARSE)
VALIDATE_DIAG_SIZE(AST)
VALIDATE_DIAG_SIZE(COMMENT)
VALIDATE_DIAG_SIZE(CROSSTU)
VALIDATE_DIAG_SIZE(SEMA)
VALIDATE_DIAG_SIZE(ANALYSIS)
VALIDATE_DIAG_SIZE(REFACTORING)
#undef VALIDATE_DIAG_SIZE
#undef STRINGIFY_NAME
const StaticDiagInfoRec StaticDiagInfo[] = {
#define DIAG(ENUM, CLASS, DEFAULT_SEVERITY, DESC, GROUP, SFINAE, NOWERROR, \
SHOWINSYSHEADER, DEFERRABLE, CATEGORY) \
{ \
diag::ENUM, \
DEFAULT_SEVERITY, \
CLASS, \
DiagnosticIDs::SFINAE, \
NOWERROR, \
SHOWINSYSHEADER, \
DEFERRABLE, \
CATEGORY, \
GROUP, \
STR_SIZE(DESC, uint16_t)},
// clang-format off
#include "clang/Basic/DiagnosticCommonKinds.inc"
#include "clang/Basic/DiagnosticDriverKinds.inc"
#include "clang/Basic/DiagnosticFrontendKinds.inc"
#include "clang/Basic/DiagnosticSerializationKinds.inc"
#include "clang/Basic/DiagnosticLexKinds.inc"
#include "clang/Basic/DiagnosticParseKinds.inc"
#include "clang/Basic/DiagnosticASTKinds.inc"
#include "clang/Basic/DiagnosticCommentKinds.inc"
#include "clang/Basic/DiagnosticCrossTUKinds.inc"
#include "clang/Basic/DiagnosticSemaKinds.inc"
#include "clang/Basic/DiagnosticAnalysisKinds.inc"
#include "clang/Basic/DiagnosticRefactoringKinds.inc"
// clang-format on
#undef DIAG
};
} // namespace
static const unsigned StaticDiagInfoSize = llvm::array_lengthof(StaticDiagInfo);
/// GetDiagInfo - Return the StaticDiagInfoRec entry for the specified DiagID,
/// or null if the ID is invalid.
static const StaticDiagInfoRec *GetDiagInfo(unsigned DiagID) {
// Out of bounds diag. Can't be in the table.
using namespace diag;
if (DiagID >= DIAG_UPPER_LIMIT || DiagID <= DIAG_START_COMMON)
return nullptr;
// Compute the index of the requested diagnostic in the static table.
// 1. Add the number of diagnostics in each category preceding the
// diagnostic and of the category the diagnostic is in. This gives us
// the offset of the category in the table.
// 2. Subtract the number of IDs in each category from our ID. This gives us
// the offset of the diagnostic in the category.
// This is cheaper than a binary search on the table as it doesn't touch
// memory at all.
unsigned Offset = 0;
unsigned ID = DiagID - DIAG_START_COMMON - 1;
#define CATEGORY(NAME, PREV) \
if (DiagID > DIAG_START_##NAME) { \
Offset += NUM_BUILTIN_##PREV##_DIAGNOSTICS - DIAG_START_##PREV - 1; \
ID -= DIAG_START_##NAME - DIAG_START_##PREV; \
}
CATEGORY(DRIVER, COMMON)
CATEGORY(FRONTEND, DRIVER)
CATEGORY(SERIALIZATION, FRONTEND)
CATEGORY(LEX, SERIALIZATION)
CATEGORY(PARSE, LEX)
CATEGORY(AST, PARSE)
CATEGORY(COMMENT, AST)
CATEGORY(CROSSTU, COMMENT)
CATEGORY(SEMA, CROSSTU)
CATEGORY(ANALYSIS, SEMA)
CATEGORY(REFACTORING, ANALYSIS)
#undef CATEGORY
// Avoid out of bounds reads.
if (ID + Offset >= StaticDiagInfoSize)
return nullptr;
assert(ID < StaticDiagInfoSize && Offset < StaticDiagInfoSize);
const StaticDiagInfoRec *Found = &StaticDiagInfo[ID + Offset];
// If the diag id doesn't match we found a different diag, abort. This can
// happen when this function is called with an ID that points into a hole in
// the diagID space.
if (Found->DiagID != DiagID)
return nullptr;
return Found;
}
static DiagnosticMapping GetDefaultDiagMapping(unsigned DiagID) {
DiagnosticMapping Info = DiagnosticMapping::Make(
diag::Severity::Fatal, /*IsUser=*/false, /*IsPragma=*/false);
if (const StaticDiagInfoRec *StaticInfo = GetDiagInfo(DiagID)) {
Info.setSeverity((diag::Severity)StaticInfo->DefaultSeverity);
if (StaticInfo->WarnNoWerror) {
assert(Info.getSeverity() == diag::Severity::Warning &&
"Unexpected mapping with no-Werror bit!");
Info.setNoWarningAsError(true);
}
}
return Info;
}
/// getCategoryNumberForDiag - Return the category number that a specified
/// DiagID belongs to, or 0 if no category.
unsigned DiagnosticIDs::getCategoryNumberForDiag(unsigned DiagID) {
if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
return Info->Category;
return 0;
}
namespace {
// The diagnostic category names.
struct StaticDiagCategoryRec {
const char *NameStr;
uint8_t NameLen;
StringRef getName() const {
return StringRef(NameStr, NameLen);
}
};
}
// Unfortunately, the split between DiagnosticIDs and Diagnostic is not
// particularly clean, but for now we just implement this method here so we can
// access GetDefaultDiagMapping.
DiagnosticMapping &
DiagnosticsEngine::DiagState::getOrAddMapping(diag::kind Diag) {
std::pair<iterator, bool> Result =
DiagMap.insert(std::make_pair(Diag, DiagnosticMapping()));
// Initialize the entry if we added it.
if (Result.second)
Result.first->second = GetDefaultDiagMapping(Diag);
return Result.first->second;
}
static const StaticDiagCategoryRec CategoryNameTable[] = {
#define GET_CATEGORY_TABLE
#define CATEGORY(X, ENUM) { X, STR_SIZE(X, uint8_t) },
#include "clang/Basic/DiagnosticGroups.inc"
#undef GET_CATEGORY_TABLE
{ nullptr, 0 }
};
/// getNumberOfCategories - Return the number of categories
unsigned DiagnosticIDs::getNumberOfCategories() {
return llvm::array_lengthof(CategoryNameTable) - 1;
}
/// getCategoryNameFromID - Given a category ID, return the name of the
/// category, an empty string if CategoryID is zero, or null if CategoryID is
/// invalid.
StringRef DiagnosticIDs::getCategoryNameFromID(unsigned CategoryID) {
if (CategoryID >= getNumberOfCategories())
return StringRef();
return CategoryNameTable[CategoryID].getName();
}
DiagnosticIDs::SFINAEResponse
DiagnosticIDs::getDiagnosticSFINAEResponse(unsigned DiagID) {
if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
return static_cast<DiagnosticIDs::SFINAEResponse>(Info->SFINAE);
return SFINAE_Report;
}
bool DiagnosticIDs::isDeferrable(unsigned DiagID) {
if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
return Info->Deferrable;
return false;
}
/// getBuiltinDiagClass - Return the class field of the diagnostic.
///
static unsigned getBuiltinDiagClass(unsigned DiagID) {
if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
return Info->Class;
return ~0U;
}
//===----------------------------------------------------------------------===//
// Custom Diagnostic information
//===----------------------------------------------------------------------===//
namespace clang {
namespace diag {
class CustomDiagInfo {
typedef std::pair<DiagnosticIDs::Level, std::string> DiagDesc;
std::vector<DiagDesc> DiagInfo;
std::map<DiagDesc, unsigned> DiagIDs;
public:
/// getDescription - Return the description of the specified custom
/// diagnostic.
StringRef getDescription(unsigned DiagID) const {
assert(DiagID - DIAG_UPPER_LIMIT < DiagInfo.size() &&
"Invalid diagnostic ID");
return DiagInfo[DiagID-DIAG_UPPER_LIMIT].second;
}
/// getLevel - Return the level of the specified custom diagnostic.
DiagnosticIDs::Level getLevel(unsigned DiagID) const {
assert(DiagID - DIAG_UPPER_LIMIT < DiagInfo.size() &&
"Invalid diagnostic ID");
return DiagInfo[DiagID-DIAG_UPPER_LIMIT].first;
}
unsigned getOrCreateDiagID(DiagnosticIDs::Level L, StringRef Message,
DiagnosticIDs &Diags) {
DiagDesc D(L, std::string(Message));
// Check to see if it already exists.
std::map<DiagDesc, unsigned>::iterator I = DiagIDs.lower_bound(D);
if (I != DiagIDs.end() && I->first == D)
return I->second;
// If not, assign a new ID.
unsigned ID = DiagInfo.size()+DIAG_UPPER_LIMIT;
DiagIDs.insert(std::make_pair(D, ID));
DiagInfo.push_back(D);
return ID;
}
};
} // end diag namespace
} // end clang namespace
//===----------------------------------------------------------------------===//
// Common Diagnostic implementation
//===----------------------------------------------------------------------===//
DiagnosticIDs::DiagnosticIDs() {}
DiagnosticIDs::~DiagnosticIDs() {}
/// getCustomDiagID - Return an ID for a diagnostic with the specified message
/// and level. If this is the first request for this diagnostic, it is
/// registered and created, otherwise the existing ID is returned.
///
/// \param FormatString A fixed diagnostic format string that will be hashed and
/// mapped to a unique DiagID.
unsigned DiagnosticIDs::getCustomDiagID(Level L, StringRef FormatString) {
if (!CustomDiagInfo)
CustomDiagInfo.reset(new diag::CustomDiagInfo());
return CustomDiagInfo->getOrCreateDiagID(L, FormatString, *this);
}
/// isBuiltinWarningOrExtension - Return true if the unmapped diagnostic
/// level of the specified diagnostic ID is a Warning or Extension.
/// This only works on builtin diagnostics, not custom ones, and is not legal to
/// call on NOTEs.
bool DiagnosticIDs::isBuiltinWarningOrExtension(unsigned DiagID) {
return DiagID < diag::DIAG_UPPER_LIMIT &&
getBuiltinDiagClass(DiagID) != CLASS_ERROR;
}
/// Determine whether the given built-in diagnostic ID is a
/// Note.
bool DiagnosticIDs::isBuiltinNote(unsigned DiagID) {
return DiagID < diag::DIAG_UPPER_LIMIT &&
getBuiltinDiagClass(DiagID) == CLASS_NOTE;
}
/// isBuiltinExtensionDiag - Determine whether the given built-in diagnostic
/// ID is for an extension of some sort. This also returns EnabledByDefault,
/// which is set to indicate whether the diagnostic is ignored by default (in
/// which case -pedantic enables it) or treated as a warning/error by default.
///
bool DiagnosticIDs::isBuiltinExtensionDiag(unsigned DiagID,
bool &EnabledByDefault) {
if (DiagID >= diag::DIAG_UPPER_LIMIT ||
getBuiltinDiagClass(DiagID) != CLASS_EXTENSION)
return false;
EnabledByDefault =
GetDefaultDiagMapping(DiagID).getSeverity() != diag::Severity::Ignored;
return true;
}
bool DiagnosticIDs::isDefaultMappingAsError(unsigned DiagID) {
if (DiagID >= diag::DIAG_UPPER_LIMIT)
return false;
return GetDefaultDiagMapping(DiagID).getSeverity() >= diag::Severity::Error;
}
/// getDescription - Given a diagnostic ID, return a description of the
/// issue.
StringRef DiagnosticIDs::getDescription(unsigned DiagID) const {
if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
return Info->getDescription();
assert(CustomDiagInfo && "Invalid CustomDiagInfo");
return CustomDiagInfo->getDescription(DiagID);
}
static DiagnosticIDs::Level toLevel(diag::Severity SV) {
switch (SV) {
case diag::Severity::Ignored:
return DiagnosticIDs::Ignored;
case diag::Severity::Remark:
return DiagnosticIDs::Remark;
case diag::Severity::Warning:
return DiagnosticIDs::Warning;
case diag::Severity::Error:
return DiagnosticIDs::Error;
case diag::Severity::Fatal:
return DiagnosticIDs::Fatal;
}
llvm_unreachable("unexpected severity");
}
/// getDiagnosticLevel - Based on the way the client configured the
/// DiagnosticsEngine object, classify the specified diagnostic ID into a Level,
/// by consumable the DiagnosticClient.
DiagnosticIDs::Level
DiagnosticIDs::getDiagnosticLevel(unsigned DiagID, SourceLocation Loc,
const DiagnosticsEngine &Diag) const {
// Handle custom diagnostics, which cannot be mapped.
if (DiagID >= diag::DIAG_UPPER_LIMIT) {
assert(CustomDiagInfo && "Invalid CustomDiagInfo");
return CustomDiagInfo->getLevel(DiagID);
}
unsigned DiagClass = getBuiltinDiagClass(DiagID);
if (DiagClass == CLASS_NOTE) return DiagnosticIDs::Note;
return toLevel(getDiagnosticSeverity(DiagID, Loc, Diag));
}
/// Based on the way the client configured the Diagnostic
/// object, classify the specified diagnostic ID into a Level, consumable by
/// the DiagnosticClient.
///
/// \param Loc The source location we are interested in finding out the
/// diagnostic state. Can be null in order to query the latest state.
diag::Severity
DiagnosticIDs::getDiagnosticSeverity(unsigned DiagID, SourceLocation Loc,
const DiagnosticsEngine &Diag) const {
assert(getBuiltinDiagClass(DiagID) != CLASS_NOTE);
// Specific non-error diagnostics may be mapped to various levels from ignored
// to error. Errors can only be mapped to fatal.
diag::Severity Result = diag::Severity::Fatal;
// Get the mapping information, or compute it lazily.
DiagnosticsEngine::DiagState *State = Diag.GetDiagStateForLoc(Loc);
DiagnosticMapping &Mapping = State->getOrAddMapping((diag::kind)DiagID);
// TODO: Can a null severity really get here?
if (Mapping.getSeverity() != diag::Severity())
Result = Mapping.getSeverity();
// Upgrade ignored diagnostics if -Weverything is enabled.
if (State->EnableAllWarnings && Result == diag::Severity::Ignored &&
!Mapping.isUser() && getBuiltinDiagClass(DiagID) != CLASS_REMARK)
Result = diag::Severity::Warning;
// Ignore -pedantic diagnostics inside __extension__ blocks.
// (The diagnostics controlled by -pedantic are the extension diagnostics
// that are not enabled by default.)
bool EnabledByDefault = false;
bool IsExtensionDiag = isBuiltinExtensionDiag(DiagID, EnabledByDefault);
if (Diag.AllExtensionsSilenced && IsExtensionDiag && !EnabledByDefault)
return diag::Severity::Ignored;
// For extension diagnostics that haven't been explicitly mapped, check if we
// should upgrade the diagnostic.
if (IsExtensionDiag && !Mapping.isUser())
Result = std::max(Result, State->ExtBehavior);
// At this point, ignored errors can no longer be upgraded.
if (Result == diag::Severity::Ignored)
return Result;
// Honor -w: this disables all messages which which are not Error/Fatal by
// default (disregarding attempts to upgrade severity from Warning to Error),
// as well as disabling all messages which are currently mapped to Warning
// (whether by default or downgraded from Error via e.g. -Wno-error or #pragma
// diagnostic.)
if (State->IgnoreAllWarnings) {
if (Result == diag::Severity::Warning ||
(Result >= diag::Severity::Error &&
!isDefaultMappingAsError((diag::kind)DiagID)))
return diag::Severity::Ignored;
}
// If -Werror is enabled, map warnings to errors unless explicitly disabled.
if (Result == diag::Severity::Warning) {
if (State->WarningsAsErrors && !Mapping.hasNoWarningAsError())
Result = diag::Severity::Error;
}
// If -Wfatal-errors is enabled, map errors to fatal unless explicitly
// disabled.
if (Result == diag::Severity::Error) {
if (State->ErrorsAsFatal && !Mapping.hasNoErrorAsFatal())
Result = diag::Severity::Fatal;
}
// If explicitly requested, map fatal errors to errors.
if (Result == diag::Severity::Fatal &&
Diag.CurDiagID != diag::fatal_too_many_errors && Diag.FatalsAsError)
Result = diag::Severity::Error;
// Custom diagnostics always are emitted in system headers.
bool ShowInSystemHeader =
!GetDiagInfo(DiagID) || GetDiagInfo(DiagID)->WarnShowInSystemHeader;
// If we are in a system header, we ignore it. We look at the diagnostic class
// because we also want to ignore extensions and warnings in -Werror and
// -pedantic-errors modes, which *map* warnings/extensions to errors.
if (State->SuppressSystemWarnings && !ShowInSystemHeader && Loc.isValid() &&
Diag.getSourceManager().isInSystemHeader(
Diag.getSourceManager().getExpansionLoc(Loc)))
return diag::Severity::Ignored;
return Result;
}
#define GET_DIAG_ARRAYS
#include "clang/Basic/DiagnosticGroups.inc"
#undef GET_DIAG_ARRAYS
namespace {
struct WarningOption {
uint16_t NameOffset;
uint16_t Members;
uint16_t SubGroups;
// String is stored with a pascal-style length byte.
StringRef getName() const {
return StringRef(DiagGroupNames + NameOffset + 1,
DiagGroupNames[NameOffset]);
}
};
}
// Second the table of options, sorted by name for fast binary lookup.
static const WarningOption OptionTable[] = {
#define GET_DIAG_TABLE
#include "clang/Basic/DiagnosticGroups.inc"
#undef GET_DIAG_TABLE
};
/// getWarningOptionForDiag - Return the lowest-level warning option that
/// enables the specified diagnostic. If there is no -Wfoo flag that controls
/// the diagnostic, this returns null.
StringRef DiagnosticIDs::getWarningOptionForDiag(unsigned DiagID) {
if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
return OptionTable[Info->getOptionGroupIndex()].getName();
return StringRef();
}
std::vector<std::string> DiagnosticIDs::getDiagnosticFlags() {
std::vector<std::string> Res;
for (size_t I = 1; DiagGroupNames[I] != '\0';) {
std::string Diag(DiagGroupNames + I + 1, DiagGroupNames[I]);
I += DiagGroupNames[I] + 1;
Res.push_back("-W" + Diag);
Res.push_back("-Wno-" + Diag);
}
return Res;
}
/// Return \c true if any diagnostics were found in this group, even if they
/// were filtered out due to having the wrong flavor.
static bool getDiagnosticsInGroup(diag::Flavor Flavor,
const WarningOption *Group,
SmallVectorImpl<diag::kind> &Diags) {
// An empty group is considered to be a warning group: we have empty groups
// for GCC compatibility, and GCC does not have remarks.
if (!Group->Members && !Group->SubGroups)
return Flavor == diag::Flavor::Remark;
bool NotFound = true;
// Add the members of the option diagnostic set.
const int16_t *Member = DiagArrays + Group->Members;
for (; *Member != -1; ++Member) {
if (GetDiagInfo(*Member)->getFlavor() == Flavor) {
NotFound = false;
Diags.push_back(*Member);
}
}
// Add the members of the subgroups.
const int16_t *SubGroups = DiagSubGroups + Group->SubGroups;
for (; *SubGroups != (int16_t)-1; ++SubGroups)
NotFound &= getDiagnosticsInGroup(Flavor, &OptionTable[(short)*SubGroups],
Diags);
return NotFound;
}
bool
DiagnosticIDs::getDiagnosticsInGroup(diag::Flavor Flavor, StringRef Group,
SmallVectorImpl<diag::kind> &Diags) const {
auto Found = llvm::partition_point(
OptionTable, [=](const WarningOption &O) { return O.getName() < Group; });
if (Found == std::end(OptionTable) || Found->getName() != Group)
return true; // Option not found.
return ::getDiagnosticsInGroup(Flavor, Found, Diags);
}
void DiagnosticIDs::getAllDiagnostics(diag::Flavor Flavor,
std::vector<diag::kind> &Diags) {
for (unsigned i = 0; i != StaticDiagInfoSize; ++i)
if (StaticDiagInfo[i].getFlavor() == Flavor)
Diags.push_back(StaticDiagInfo[i].DiagID);
}
StringRef DiagnosticIDs::getNearestOption(diag::Flavor Flavor,
StringRef Group) {
StringRef Best;
unsigned BestDistance = Group.size() + 1; // Sanity threshold.
for (const WarningOption &O : OptionTable) {
// Don't suggest ignored warning flags.
if (!O.Members && !O.SubGroups)
continue;
unsigned Distance = O.getName().edit_distance(Group, true, BestDistance);
if (Distance > BestDistance)
continue;
// Don't suggest groups that are not of this kind.
llvm::SmallVector<diag::kind, 8> Diags;
if (::getDiagnosticsInGroup(Flavor, &O, Diags) || Diags.empty())
continue;
if (Distance == BestDistance) {
// Two matches with the same distance, don't prefer one over the other.
Best = "";
} else if (Distance < BestDistance) {
// This is a better match.
Best = O.getName();
BestDistance = Distance;
}
}
return Best;
}
/// ProcessDiag - This is the method used to report a diagnostic that is
/// finally fully formed.
bool DiagnosticIDs::ProcessDiag(DiagnosticsEngine &Diag) const {
Diagnostic Info(&Diag);
assert(Diag.getClient() && "DiagnosticClient not set!");
// Figure out the diagnostic level of this message.
unsigned DiagID = Info.getID();
DiagnosticIDs::Level DiagLevel
= getDiagnosticLevel(DiagID, Info.getLocation(), Diag);
// Update counts for DiagnosticErrorTrap even if a fatal error occurred
// or diagnostics are suppressed.
if (DiagLevel >= DiagnosticIDs::Error) {
++Diag.TrapNumErrorsOccurred;
if (isUnrecoverable(DiagID))
++Diag.TrapNumUnrecoverableErrorsOccurred;
}
if (Diag.SuppressAllDiagnostics)
return false;
if (DiagLevel != DiagnosticIDs::Note) {
// Record that a fatal error occurred only when we see a second
// non-note diagnostic. This allows notes to be attached to the
// fatal error, but suppresses any diagnostics that follow those
// notes.
if (Diag.LastDiagLevel == DiagnosticIDs::Fatal)
Diag.FatalErrorOccurred = true;
Diag.LastDiagLevel = DiagLevel;
}
// If a fatal error has already been emitted, silence all subsequent
// diagnostics.
if (Diag.FatalErrorOccurred) {
if (DiagLevel >= DiagnosticIDs::Error &&
Diag.Client->IncludeInDiagnosticCounts()) {
++Diag.NumErrors;
}
return false;
}
// If the client doesn't care about this message, don't issue it. If this is
// a note and the last real diagnostic was ignored, ignore it too.
if (DiagLevel == DiagnosticIDs::Ignored ||
(DiagLevel == DiagnosticIDs::Note &&
Diag.LastDiagLevel == DiagnosticIDs::Ignored))
return false;
if (DiagLevel >= DiagnosticIDs::Error) {
if (isUnrecoverable(DiagID))
Diag.UnrecoverableErrorOccurred = true;
// Warnings which have been upgraded to errors do not prevent compilation.
if (isDefaultMappingAsError(DiagID))
Diag.UncompilableErrorOccurred = true;
Diag.ErrorOccurred = true;
if (Diag.Client->IncludeInDiagnosticCounts()) {
++Diag.NumErrors;
}
// If we've emitted a lot of errors, emit a fatal error instead of it to
// stop a flood of bogus errors.
if (Diag.ErrorLimit && Diag.NumErrors > Diag.ErrorLimit &&
DiagLevel == DiagnosticIDs::Error) {
Diag.SetDelayedDiagnostic(diag::fatal_too_many_errors);
return false;
}
}
// Make sure we set FatalErrorOccurred to ensure that the notes from the
// diagnostic that caused `fatal_too_many_errors` won't be emitted.
if (Diag.CurDiagID == diag::fatal_too_many_errors)
Diag.FatalErrorOccurred = true;
// Finally, report it.
EmitDiag(Diag, DiagLevel);
return true;
}
void DiagnosticIDs::EmitDiag(DiagnosticsEngine &Diag, Level DiagLevel) const {
Diagnostic Info(&Diag);
assert(DiagLevel != DiagnosticIDs::Ignored && "Cannot emit ignored diagnostics!");
Diag.Client->HandleDiagnostic((DiagnosticsEngine::Level)DiagLevel, Info);
if (Diag.Client->IncludeInDiagnosticCounts()) {
if (DiagLevel == DiagnosticIDs::Warning)
++Diag.NumWarnings;
}
Diag.CurDiagID = ~0U;
}
bool DiagnosticIDs::isUnrecoverable(unsigned DiagID) const {
if (DiagID >= diag::DIAG_UPPER_LIMIT) {
assert(CustomDiagInfo && "Invalid CustomDiagInfo");
// Custom diagnostics.
return CustomDiagInfo->getLevel(DiagID) >= DiagnosticIDs::Error;
}
// Only errors may be unrecoverable.
if (getBuiltinDiagClass(DiagID) < CLASS_ERROR)
return false;
if (DiagID == diag::err_unavailable ||
DiagID == diag::err_unavailable_message)
return false;
// Currently we consider all ARC errors as recoverable.
if (isARCDiagnostic(DiagID))
return false;
return true;
}
bool DiagnosticIDs::isARCDiagnostic(unsigned DiagID) {
unsigned cat = getCategoryNumberForDiag(DiagID);
return DiagnosticIDs::getCategoryNameFromID(cat).startswith("ARC ");
}
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