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llvm-project/clang/tools/libclang/CIndexCodeCompletion.cpp

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//===- CIndexCodeCompletion.cpp - Code Completion API hooks ---------------===//
//
// 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 Clang-C Source Indexing library hooks for
// code completion.
//
//===----------------------------------------------------------------------===//
#include "CIndexer.h"
#include "CIndexDiagnostic.h"
#include "CLog.h"
#include "CXCursor.h"
#include "CXSourceLocation.h"
#include "CXString.h"
#include "CXTranslationUnit.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/Type.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Frontend/ASTUnit.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Sema/CodeCompleteConsumer.h"
#include "clang/Sema/Sema.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/CrashRecoveryContext.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/Timer.h"
#include "llvm/Support/raw_ostream.h"
#include <atomic>
#include <cstdio>
#include <cstdlib>
#include <string>
#ifdef UDP_CODE_COMPLETION_LOGGER
#include "clang/Basic/Version.h"
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#endif
using namespace clang;
using namespace clang::cxindex;
enum CXCompletionChunkKind
clang_getCompletionChunkKind(CXCompletionString completion_string,
unsigned chunk_number) {
CodeCompletionString *CCStr = (CodeCompletionString *)completion_string;
if (!CCStr || chunk_number >= CCStr->size())
return CXCompletionChunk_Text;
switch ((*CCStr)[chunk_number].Kind) {
case CodeCompletionString::CK_TypedText:
return CXCompletionChunk_TypedText;
case CodeCompletionString::CK_Text:
return CXCompletionChunk_Text;
case CodeCompletionString::CK_Optional:
return CXCompletionChunk_Optional;
case CodeCompletionString::CK_Placeholder:
return CXCompletionChunk_Placeholder;
case CodeCompletionString::CK_Informative:
return CXCompletionChunk_Informative;
case CodeCompletionString::CK_ResultType:
return CXCompletionChunk_ResultType;
case CodeCompletionString::CK_CurrentParameter:
return CXCompletionChunk_CurrentParameter;
case CodeCompletionString::CK_LeftParen:
return CXCompletionChunk_LeftParen;
case CodeCompletionString::CK_RightParen:
return CXCompletionChunk_RightParen;
case CodeCompletionString::CK_LeftBracket:
return CXCompletionChunk_LeftBracket;
case CodeCompletionString::CK_RightBracket:
return CXCompletionChunk_RightBracket;
case CodeCompletionString::CK_LeftBrace:
return CXCompletionChunk_LeftBrace;
case CodeCompletionString::CK_RightBrace:
return CXCompletionChunk_RightBrace;
case CodeCompletionString::CK_LeftAngle:
return CXCompletionChunk_LeftAngle;
case CodeCompletionString::CK_RightAngle:
return CXCompletionChunk_RightAngle;
case CodeCompletionString::CK_Comma:
return CXCompletionChunk_Comma;
case CodeCompletionString::CK_Colon:
return CXCompletionChunk_Colon;
case CodeCompletionString::CK_SemiColon:
return CXCompletionChunk_SemiColon;
case CodeCompletionString::CK_Equal:
return CXCompletionChunk_Equal;
case CodeCompletionString::CK_HorizontalSpace:
return CXCompletionChunk_HorizontalSpace;
case CodeCompletionString::CK_VerticalSpace:
return CXCompletionChunk_VerticalSpace;
}
llvm_unreachable("Invalid CompletionKind!");
}
CXString clang_getCompletionChunkText(CXCompletionString completion_string,
unsigned chunk_number) {
CodeCompletionString *CCStr = (CodeCompletionString *)completion_string;
if (!CCStr || chunk_number >= CCStr->size())
return cxstring::createNull();
switch ((*CCStr)[chunk_number].Kind) {
case CodeCompletionString::CK_TypedText:
case CodeCompletionString::CK_Text:
case CodeCompletionString::CK_Placeholder:
case CodeCompletionString::CK_CurrentParameter:
case CodeCompletionString::CK_Informative:
case CodeCompletionString::CK_LeftParen:
case CodeCompletionString::CK_RightParen:
case CodeCompletionString::CK_LeftBracket:
case CodeCompletionString::CK_RightBracket:
case CodeCompletionString::CK_LeftBrace:
case CodeCompletionString::CK_RightBrace:
case CodeCompletionString::CK_LeftAngle:
case CodeCompletionString::CK_RightAngle:
case CodeCompletionString::CK_Comma:
case CodeCompletionString::CK_ResultType:
case CodeCompletionString::CK_Colon:
case CodeCompletionString::CK_SemiColon:
case CodeCompletionString::CK_Equal:
case CodeCompletionString::CK_HorizontalSpace:
case CodeCompletionString::CK_VerticalSpace:
return cxstring::createRef((*CCStr)[chunk_number].Text);
case CodeCompletionString::CK_Optional:
// Note: treated as an empty text block.
return cxstring::createEmpty();
}
llvm_unreachable("Invalid CodeCompletionString Kind!");
}
CXCompletionString
clang_getCompletionChunkCompletionString(CXCompletionString completion_string,
unsigned chunk_number) {
CodeCompletionString *CCStr = (CodeCompletionString *)completion_string;
if (!CCStr || chunk_number >= CCStr->size())
return nullptr;
switch ((*CCStr)[chunk_number].Kind) {
case CodeCompletionString::CK_TypedText:
case CodeCompletionString::CK_Text:
case CodeCompletionString::CK_Placeholder:
case CodeCompletionString::CK_CurrentParameter:
case CodeCompletionString::CK_Informative:
case CodeCompletionString::CK_LeftParen:
case CodeCompletionString::CK_RightParen:
case CodeCompletionString::CK_LeftBracket:
case CodeCompletionString::CK_RightBracket:
case CodeCompletionString::CK_LeftBrace:
case CodeCompletionString::CK_RightBrace:
case CodeCompletionString::CK_LeftAngle:
case CodeCompletionString::CK_RightAngle:
case CodeCompletionString::CK_Comma:
case CodeCompletionString::CK_ResultType:
case CodeCompletionString::CK_Colon:
case CodeCompletionString::CK_SemiColon:
case CodeCompletionString::CK_Equal:
case CodeCompletionString::CK_HorizontalSpace:
case CodeCompletionString::CK_VerticalSpace:
return nullptr;
case CodeCompletionString::CK_Optional:
// Note: treated as an empty text block.
return (*CCStr)[chunk_number].Optional;
}
llvm_unreachable("Invalid CompletionKind!");
}
unsigned clang_getNumCompletionChunks(CXCompletionString completion_string) {
CodeCompletionString *CCStr = (CodeCompletionString *)completion_string;
return CCStr? CCStr->size() : 0;
}
unsigned clang_getCompletionPriority(CXCompletionString completion_string) {
CodeCompletionString *CCStr = (CodeCompletionString *)completion_string;
return CCStr? CCStr->getPriority() : unsigned(CCP_Unlikely);
}
enum CXAvailabilityKind
clang_getCompletionAvailability(CXCompletionString completion_string) {
CodeCompletionString *CCStr = (CodeCompletionString *)completion_string;
return CCStr? static_cast<CXAvailabilityKind>(CCStr->getAvailability())
: CXAvailability_Available;
}
unsigned clang_getCompletionNumAnnotations(CXCompletionString completion_string)
{
CodeCompletionString *CCStr = (CodeCompletionString *)completion_string;
return CCStr ? CCStr->getAnnotationCount() : 0;
}
CXString clang_getCompletionAnnotation(CXCompletionString completion_string,
unsigned annotation_number) {
CodeCompletionString *CCStr = (CodeCompletionString *)completion_string;
return CCStr ? cxstring::createRef(CCStr->getAnnotation(annotation_number))
: cxstring::createNull();
}
CXString
clang_getCompletionParent(CXCompletionString completion_string,
CXCursorKind *kind) {
if (kind)
*kind = CXCursor_NotImplemented;
CodeCompletionString *CCStr = (CodeCompletionString *)completion_string;
if (!CCStr)
return cxstring::createNull();
return cxstring::createRef(CCStr->getParentContextName());
}
CXString
clang_getCompletionBriefComment(CXCompletionString completion_string) {
CodeCompletionString *CCStr = (CodeCompletionString *)completion_string;
if (!CCStr)
return cxstring::createNull();
return cxstring::createRef(CCStr->getBriefComment());
}
namespace {
/// The CXCodeCompleteResults structure we allocate internally;
/// the client only sees the initial CXCodeCompleteResults structure.
///
/// Normally, clients of CXString shouldn't care whether or not a CXString is
/// managed by a pool or by explicitly malloc'ed memory. But
/// AllocatedCXCodeCompleteResults outlives the CXTranslationUnit, so we can
/// not rely on the StringPool in the TU.
struct AllocatedCXCodeCompleteResults : public CXCodeCompleteResults {
AllocatedCXCodeCompleteResults(IntrusiveRefCntPtr<FileManager> FileMgr);
~AllocatedCXCodeCompleteResults();
/// Diagnostics produced while performing code completion.
SmallVector<StoredDiagnostic, 8> Diagnostics;
/// Allocated API-exposed wrappters for Diagnostics.
SmallVector<CXStoredDiagnostic *, 8> DiagnosticsWrappers;
IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts;
/// Diag object
IntrusiveRefCntPtr<DiagnosticsEngine> Diag;
/// Language options used to adjust source locations.
LangOptions LangOpts;
/// File manager, used for diagnostics.
IntrusiveRefCntPtr<FileManager> FileMgr;
/// Source manager, used for diagnostics.
IntrusiveRefCntPtr<SourceManager> SourceMgr;
/// Temporary buffers that will be deleted once we have finished with
/// the code-completion results.
SmallVector<const llvm::MemoryBuffer *, 1> TemporaryBuffers;
/// Allocator used to store globally cached code-completion results.
std::shared_ptr<clang::GlobalCodeCompletionAllocator>
CachedCompletionAllocator;
/// Allocator used to store code completion results.
std::shared_ptr<clang::GlobalCodeCompletionAllocator> CodeCompletionAllocator;
/// Context under which completion occurred.
enum clang::CodeCompletionContext::Kind ContextKind;
/// A bitfield representing the acceptable completions for the
/// current context.
unsigned long long Contexts;
/// The kind of the container for the current context for completions.
enum CXCursorKind ContainerKind;
/// The USR of the container for the current context for completions.
std::string ContainerUSR;
/// a boolean value indicating whether there is complete information
/// about the container
unsigned ContainerIsIncomplete;
/// A string containing the Objective-C selector entered thus far for a
/// message send.
std::string Selector;
/// Vector of fix-its for each completion result that *must* be applied
/// before that result for the corresponding completion item.
std::vector<std::vector<FixItHint>> FixItsVector;
};
} // end anonymous namespace
unsigned clang_getCompletionNumFixIts(CXCodeCompleteResults *results,
unsigned completion_index) {
AllocatedCXCodeCompleteResults *allocated_results = (AllocatedCXCodeCompleteResults *)results;
if (!allocated_results || allocated_results->FixItsVector.size() <= completion_index)
return 0;
return static_cast<unsigned>(allocated_results->FixItsVector[completion_index].size());
}
CXString clang_getCompletionFixIt(CXCodeCompleteResults *results,
unsigned completion_index,
unsigned fixit_index,
CXSourceRange *replacement_range) {
AllocatedCXCodeCompleteResults *allocated_results = (AllocatedCXCodeCompleteResults *)results;
if (!allocated_results || allocated_results->FixItsVector.size() <= completion_index) {
if (replacement_range)
*replacement_range = clang_getNullRange();
return cxstring::createNull();
}
ArrayRef<FixItHint> FixIts = allocated_results->FixItsVector[completion_index];
if (FixIts.size() <= fixit_index) {
if (replacement_range)
*replacement_range = clang_getNullRange();
return cxstring::createNull();
}
const FixItHint &FixIt = FixIts[fixit_index];
if (replacement_range) {
*replacement_range = cxloc::translateSourceRange(
*allocated_results->SourceMgr, allocated_results->LangOpts,
FixIt.RemoveRange);
}
return cxstring::createRef(FixIt.CodeToInsert.c_str());
}
/// Tracks the number of code-completion result objects that are
/// currently active.
///
/// Used for debugging purposes only.
static std::atomic<unsigned> CodeCompletionResultObjects;
AllocatedCXCodeCompleteResults::AllocatedCXCodeCompleteResults(
IntrusiveRefCntPtr<FileManager> FileMgr)
: CXCodeCompleteResults(), DiagOpts(new DiagnosticOptions),
Diag(new DiagnosticsEngine(
IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs), &*DiagOpts)),
FileMgr(std::move(FileMgr)),
SourceMgr(new SourceManager(*Diag, *this->FileMgr)),
CodeCompletionAllocator(
std::make_shared<clang::GlobalCodeCompletionAllocator>()),
Contexts(CXCompletionContext_Unknown),
ContainerKind(CXCursor_InvalidCode), ContainerIsIncomplete(1) {
if (getenv("LIBCLANG_OBJTRACKING"))
fprintf(stderr, "+++ %u completion results\n",
++CodeCompletionResultObjects);
}
AllocatedCXCodeCompleteResults::~AllocatedCXCodeCompleteResults() {
llvm::DeleteContainerPointers(DiagnosticsWrappers);
delete [] Results;
for (unsigned I = 0, N = TemporaryBuffers.size(); I != N; ++I)
delete TemporaryBuffers[I];
if (getenv("LIBCLANG_OBJTRACKING"))
fprintf(stderr, "--- %u completion results\n",
--CodeCompletionResultObjects);
}
static unsigned long long getContextsForContextKind(
enum CodeCompletionContext::Kind kind,
Sema &S) {
unsigned long long contexts = 0;
switch (kind) {
case CodeCompletionContext::CCC_OtherWithMacros: {
//We can allow macros here, but we don't know what else is permissible
//So we'll say the only thing permissible are macros
contexts = CXCompletionContext_MacroName;
break;
}
case CodeCompletionContext::CCC_TopLevel:
case CodeCompletionContext::CCC_ObjCIvarList:
case CodeCompletionContext::CCC_ClassStructUnion:
case CodeCompletionContext::CCC_Type: {
contexts = CXCompletionContext_AnyType |
CXCompletionContext_ObjCInterface;
if (S.getLangOpts().CPlusPlus) {
contexts |= CXCompletionContext_EnumTag |
CXCompletionContext_UnionTag |
CXCompletionContext_StructTag |
CXCompletionContext_ClassTag |
CXCompletionContext_NestedNameSpecifier;
}
break;
}
case CodeCompletionContext::CCC_Statement: {
contexts = CXCompletionContext_AnyType |
CXCompletionContext_ObjCInterface |
CXCompletionContext_AnyValue;
if (S.getLangOpts().CPlusPlus) {
contexts |= CXCompletionContext_EnumTag |
CXCompletionContext_UnionTag |
CXCompletionContext_StructTag |
CXCompletionContext_ClassTag |
CXCompletionContext_NestedNameSpecifier;
}
break;
}
case CodeCompletionContext::CCC_Expression: {
contexts = CXCompletionContext_AnyValue;
if (S.getLangOpts().CPlusPlus) {
contexts |= CXCompletionContext_AnyType |
CXCompletionContext_ObjCInterface |
CXCompletionContext_EnumTag |
CXCompletionContext_UnionTag |
CXCompletionContext_StructTag |
CXCompletionContext_ClassTag |
CXCompletionContext_NestedNameSpecifier;
}
break;
}
case CodeCompletionContext::CCC_ObjCMessageReceiver: {
contexts = CXCompletionContext_ObjCObjectValue |
CXCompletionContext_ObjCSelectorValue |
CXCompletionContext_ObjCInterface;
if (S.getLangOpts().CPlusPlus) {
contexts |= CXCompletionContext_CXXClassTypeValue |
CXCompletionContext_AnyType |
CXCompletionContext_EnumTag |
CXCompletionContext_UnionTag |
CXCompletionContext_StructTag |
CXCompletionContext_ClassTag |
CXCompletionContext_NestedNameSpecifier;
}
break;
}
case CodeCompletionContext::CCC_DotMemberAccess: {
contexts = CXCompletionContext_DotMemberAccess;
break;
}
case CodeCompletionContext::CCC_ArrowMemberAccess: {
contexts = CXCompletionContext_ArrowMemberAccess;
break;
}
case CodeCompletionContext::CCC_ObjCPropertyAccess: {
contexts = CXCompletionContext_ObjCPropertyAccess;
break;
}
case CodeCompletionContext::CCC_EnumTag: {
contexts = CXCompletionContext_EnumTag |
CXCompletionContext_NestedNameSpecifier;
break;
}
case CodeCompletionContext::CCC_UnionTag: {
contexts = CXCompletionContext_UnionTag |
CXCompletionContext_NestedNameSpecifier;
break;
}
case CodeCompletionContext::CCC_ClassOrStructTag: {
contexts = CXCompletionContext_StructTag |
CXCompletionContext_ClassTag |
CXCompletionContext_NestedNameSpecifier;
break;
}
case CodeCompletionContext::CCC_ObjCProtocolName: {
contexts = CXCompletionContext_ObjCProtocol;
break;
}
case CodeCompletionContext::CCC_Namespace: {
contexts = CXCompletionContext_Namespace;
break;
}
case CodeCompletionContext::CCC_SymbolOrNewName:
case CodeCompletionContext::CCC_Symbol: {
contexts = CXCompletionContext_NestedNameSpecifier;
break;
}
case CodeCompletionContext::CCC_MacroNameUse: {
contexts = CXCompletionContext_MacroName;
break;
}
case CodeCompletionContext::CCC_NaturalLanguage: {
contexts = CXCompletionContext_NaturalLanguage;
break;
}
case CodeCompletionContext::CCC_IncludedFile: {
contexts = CXCompletionContext_IncludedFile;
break;
}
case CodeCompletionContext::CCC_SelectorName: {
contexts = CXCompletionContext_ObjCSelectorName;
break;
}
case CodeCompletionContext::CCC_ParenthesizedExpression: {
contexts = CXCompletionContext_AnyType |
CXCompletionContext_ObjCInterface |
CXCompletionContext_AnyValue;
if (S.getLangOpts().CPlusPlus) {
contexts |= CXCompletionContext_EnumTag |
CXCompletionContext_UnionTag |
CXCompletionContext_StructTag |
CXCompletionContext_ClassTag |
CXCompletionContext_NestedNameSpecifier;
}
break;
}
case CodeCompletionContext::CCC_ObjCInstanceMessage: {
contexts = CXCompletionContext_ObjCInstanceMessage;
break;
}
case CodeCompletionContext::CCC_ObjCClassMessage: {
contexts = CXCompletionContext_ObjCClassMessage;
break;
}
case CodeCompletionContext::CCC_ObjCInterfaceName: {
contexts = CXCompletionContext_ObjCInterface;
break;
}
case CodeCompletionContext::CCC_ObjCCategoryName: {
contexts = CXCompletionContext_ObjCCategory;
break;
}
case CodeCompletionContext::CCC_Other:
case CodeCompletionContext::CCC_ObjCInterface:
case CodeCompletionContext::CCC_ObjCImplementation:
case CodeCompletionContext::CCC_NewName:
case CodeCompletionContext::CCC_MacroName:
case CodeCompletionContext::CCC_PreprocessorExpression:
case CodeCompletionContext::CCC_PreprocessorDirective:
case CodeCompletionContext::CCC_TypeQualifiers: {
//Only Clang results should be accepted, so we'll set all of the other
//context bits to 0 (i.e. the empty set)
contexts = CXCompletionContext_Unexposed;
break;
}
case CodeCompletionContext::CCC_Recovery: {
//We don't know what the current context is, so we'll return unknown
//This is the equivalent of setting all of the other context bits
contexts = CXCompletionContext_Unknown;
break;
}
}
return contexts;
}
namespace {
class CaptureCompletionResults : public CodeCompleteConsumer {
AllocatedCXCodeCompleteResults &AllocatedResults;
CodeCompletionTUInfo CCTUInfo;
SmallVector<CXCompletionResult, 16> StoredResults;
CXTranslationUnit *TU;
public:
CaptureCompletionResults(const CodeCompleteOptions &Opts,
AllocatedCXCodeCompleteResults &Results,
CXTranslationUnit *TranslationUnit)
: CodeCompleteConsumer(Opts, false),
AllocatedResults(Results), CCTUInfo(Results.CodeCompletionAllocator),
TU(TranslationUnit) { }
~CaptureCompletionResults() override { Finish(); }
void ProcessCodeCompleteResults(Sema &S,
CodeCompletionContext Context,
CodeCompletionResult *Results,
unsigned NumResults) override {
StoredResults.reserve(StoredResults.size() + NumResults);
if (includeFixIts())
AllocatedResults.FixItsVector.reserve(NumResults);
for (unsigned I = 0; I != NumResults; ++I) {
CodeCompletionString *StoredCompletion
= Results[I].CreateCodeCompletionString(S, Context, getAllocator(),
getCodeCompletionTUInfo(),
includeBriefComments());
CXCompletionResult R;
R.CursorKind = Results[I].CursorKind;
R.CompletionString = StoredCompletion;
StoredResults.push_back(R);
if (includeFixIts())
AllocatedResults.FixItsVector.emplace_back(std::move(Results[I].FixIts));
}
enum CodeCompletionContext::Kind contextKind = Context.getKind();
AllocatedResults.ContextKind = contextKind;
AllocatedResults.Contexts = getContextsForContextKind(contextKind, S);
AllocatedResults.Selector = "";
ArrayRef<IdentifierInfo *> SelIdents = Context.getSelIdents();
for (ArrayRef<IdentifierInfo *>::iterator I = SelIdents.begin(),
E = SelIdents.end();
I != E; ++I) {
if (IdentifierInfo *selIdent = *I)
AllocatedResults.Selector += selIdent->getName();
AllocatedResults.Selector += ":";
}
QualType baseType = Context.getBaseType();
NamedDecl *D = nullptr;
if (!baseType.isNull()) {
// Get the declaration for a class/struct/union/enum type
if (const TagType *Tag = baseType->getAs<TagType>())
D = Tag->getDecl();
// Get the @interface declaration for a (possibly-qualified) Objective-C
// object pointer type, e.g., NSString*
else if (const ObjCObjectPointerType *ObjPtr =
baseType->getAs<ObjCObjectPointerType>())
D = ObjPtr->getInterfaceDecl();
// Get the @interface declaration for an Objective-C object type
else if (const ObjCObjectType *Obj = baseType->getAs<ObjCObjectType>())
D = Obj->getInterface();
// Get the class for a C++ injected-class-name
else if (const InjectedClassNameType *Injected =
baseType->getAs<InjectedClassNameType>())
D = Injected->getDecl();
}
if (D != nullptr) {
CXCursor cursor = cxcursor::MakeCXCursor(D, *TU);
AllocatedResults.ContainerKind = clang_getCursorKind(cursor);
CXString CursorUSR = clang_getCursorUSR(cursor);
AllocatedResults.ContainerUSR = clang_getCString(CursorUSR);
clang_disposeString(CursorUSR);
const Type *type = baseType.getTypePtrOrNull();
if (type) {
AllocatedResults.ContainerIsIncomplete = type->isIncompleteType();
}
else {
AllocatedResults.ContainerIsIncomplete = 1;
}
}
else {
AllocatedResults.ContainerKind = CXCursor_InvalidCode;
AllocatedResults.ContainerUSR.clear();
AllocatedResults.ContainerIsIncomplete = 1;
}
}
void ProcessOverloadCandidates(Sema &S, unsigned CurrentArg,
OverloadCandidate *Candidates,
unsigned NumCandidates,
SourceLocation OpenParLoc) override {
StoredResults.reserve(StoredResults.size() + NumCandidates);
for (unsigned I = 0; I != NumCandidates; ++I) {
CodeCompletionString *StoredCompletion
= Candidates[I].CreateSignatureString(CurrentArg, S, getAllocator(),
getCodeCompletionTUInfo(),
includeBriefComments());
CXCompletionResult R;
R.CursorKind = CXCursor_OverloadCandidate;
R.CompletionString = StoredCompletion;
StoredResults.push_back(R);
}
}
CodeCompletionAllocator &getAllocator() override {
return *AllocatedResults.CodeCompletionAllocator;
}
CodeCompletionTUInfo &getCodeCompletionTUInfo() override { return CCTUInfo;}
private:
void Finish() {
AllocatedResults.Results = new CXCompletionResult [StoredResults.size()];
AllocatedResults.NumResults = StoredResults.size();
std::memcpy(AllocatedResults.Results, StoredResults.data(),
StoredResults.size() * sizeof(CXCompletionResult));
StoredResults.clear();
}
};
}
static CXCodeCompleteResults *
clang_codeCompleteAt_Impl(CXTranslationUnit TU, const char *complete_filename,
unsigned complete_line, unsigned complete_column,
ArrayRef<CXUnsavedFile> unsaved_files,
unsigned options) {
bool IncludeBriefComments = options & CXCodeComplete_IncludeBriefComments;
bool SkipPreamble = options & CXCodeComplete_SkipPreamble;
bool IncludeFixIts = options & CXCodeComplete_IncludeCompletionsWithFixIts;
#ifdef UDP_CODE_COMPLETION_LOGGER
#ifdef UDP_CODE_COMPLETION_LOGGER_PORT
const llvm::TimeRecord &StartTime = llvm::TimeRecord::getCurrentTime();
#endif
#endif
bool EnableLogging = getenv("LIBCLANG_CODE_COMPLETION_LOGGING") != nullptr;
if (cxtu::isNotUsableTU(TU)) {
LOG_BAD_TU(TU);
return nullptr;
}
ASTUnit *AST = cxtu::getASTUnit(TU);
if (!AST)
return nullptr;
CIndexer *CXXIdx = TU->CIdx;
if (CXXIdx->isOptEnabled(CXGlobalOpt_ThreadBackgroundPriorityForEditing))
setThreadBackgroundPriority();
ASTUnit::ConcurrencyCheck Check(*AST);
// Perform the remapping of source files.
SmallVector<ASTUnit::RemappedFile, 4> RemappedFiles;
for (auto &UF : unsaved_files) {
std::unique_ptr<llvm::MemoryBuffer> MB =
llvm::MemoryBuffer::getMemBufferCopy(getContents(UF), UF.Filename);
RemappedFiles.push_back(std::make_pair(UF.Filename, MB.release()));
}
if (EnableLogging) {
// FIXME: Add logging.
}
// Parse the resulting source file to find code-completion results.
AllocatedCXCodeCompleteResults *Results = new AllocatedCXCodeCompleteResults(
&AST->getFileManager());
Results->Results = nullptr;
Results->NumResults = 0;
// Create a code-completion consumer to capture the results.
CodeCompleteOptions Opts;
Opts.IncludeBriefComments = IncludeBriefComments;
Opts.LoadExternal = !SkipPreamble;
Opts.IncludeFixIts = IncludeFixIts;
CaptureCompletionResults Capture(Opts, *Results, &TU);
// Perform completion.
std::vector<const char *> CArgs;
for (const auto &Arg : TU->Arguments)
CArgs.push_back(Arg.c_str());
std::string CompletionInvocation =
llvm::formatv("-code-completion-at={0}:{1}:{2}", complete_filename,
complete_line, complete_column)
.str();
LibclangInvocationReporter InvocationReporter(
*CXXIdx, LibclangInvocationReporter::OperationKind::CompletionOperation,
TU->ParsingOptions, CArgs, CompletionInvocation, unsaved_files);
AST->CodeComplete(complete_filename, complete_line, complete_column,
RemappedFiles, (options & CXCodeComplete_IncludeMacros),
(options & CXCodeComplete_IncludeCodePatterns),
IncludeBriefComments, Capture,
CXXIdx->getPCHContainerOperations(), *Results->Diag,
Results->LangOpts, *Results->SourceMgr, *Results->FileMgr,
Results->Diagnostics, Results->TemporaryBuffers);
Results->DiagnosticsWrappers.resize(Results->Diagnostics.size());
// Keep a reference to the allocator used for cached global completions, so
// that we can be sure that the memory used by our code completion strings
// doesn't get freed due to subsequent reparses (while the code completion
// results are still active).
Results->CachedCompletionAllocator = AST->getCachedCompletionAllocator();
#ifdef UDP_CODE_COMPLETION_LOGGER
#ifdef UDP_CODE_COMPLETION_LOGGER_PORT
const llvm::TimeRecord &EndTime = llvm::TimeRecord::getCurrentTime();
SmallString<256> LogResult;
llvm::raw_svector_ostream os(LogResult);
// Figure out the language and whether or not it uses PCH.
const char *lang = 0;
bool usesPCH = false;
for (std::vector<const char*>::iterator I = argv.begin(), E = argv.end();
I != E; ++I) {
if (*I == 0)
continue;
if (strcmp(*I, "-x") == 0) {
if (I + 1 != E) {
lang = *(++I);
continue;
}
}
else if (strcmp(*I, "-include") == 0) {
if (I+1 != E) {
const char *arg = *(++I);
SmallString<512> pchName;
{
llvm::raw_svector_ostream os(pchName);
os << arg << ".pth";
}
pchName.push_back('\0');
struct stat stat_results;
if (stat(pchName.str().c_str(), &stat_results) == 0)
usesPCH = true;
continue;
}
}
}
os << "{ ";
os << "\"wall\": " << (EndTime.getWallTime() - StartTime.getWallTime());
os << ", \"numRes\": " << Results->NumResults;
os << ", \"diags\": " << Results->Diagnostics.size();
os << ", \"pch\": " << (usesPCH ? "true" : "false");
os << ", \"lang\": \"" << (lang ? lang : "<unknown>") << '"';
const char *name = getlogin();
os << ", \"user\": \"" << (name ? name : "unknown") << '"';
os << ", \"clangVer\": \"" << getClangFullVersion() << '"';
os << " }";
StringRef res = os.str();
if (res.size() > 0) {
do {
// Setup the UDP socket.
struct sockaddr_in servaddr;
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(UDP_CODE_COMPLETION_LOGGER_PORT);
if (inet_pton(AF_INET, UDP_CODE_COMPLETION_LOGGER,
&servaddr.sin_addr) <= 0)
break;
int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd < 0)
break;
sendto(sockfd, res.data(), res.size(), 0,
(struct sockaddr *)&servaddr, sizeof(servaddr));
close(sockfd);
}
while (false);
}
#endif
#endif
return Results;
}
CXCodeCompleteResults *clang_codeCompleteAt(CXTranslationUnit TU,
const char *complete_filename,
unsigned complete_line,
unsigned complete_column,
struct CXUnsavedFile *unsaved_files,
unsigned num_unsaved_files,
unsigned options) {
LOG_FUNC_SECTION {
*Log << TU << ' '
<< complete_filename << ':' << complete_line << ':' << complete_column;
}
if (num_unsaved_files && !unsaved_files)
return nullptr;
CXCodeCompleteResults *result;
auto CodeCompleteAtImpl = [=, &result]() {
result = clang_codeCompleteAt_Impl(
TU, complete_filename, complete_line, complete_column,
llvm::makeArrayRef(unsaved_files, num_unsaved_files), options);
};
llvm::CrashRecoveryContext CRC;
if (!RunSafely(CRC, CodeCompleteAtImpl)) {
fprintf(stderr, "libclang: crash detected in code completion\n");
cxtu::getASTUnit(TU)->setUnsafeToFree(true);
return nullptr;
} else if (getenv("LIBCLANG_RESOURCE_USAGE"))
PrintLibclangResourceUsage(TU);
return result;
}
unsigned clang_defaultCodeCompleteOptions(void) {
return CXCodeComplete_IncludeMacros;
}
void clang_disposeCodeCompleteResults(CXCodeCompleteResults *ResultsIn) {
if (!ResultsIn)
return;
AllocatedCXCodeCompleteResults *Results
= static_cast<AllocatedCXCodeCompleteResults*>(ResultsIn);
delete Results;
}
unsigned
clang_codeCompleteGetNumDiagnostics(CXCodeCompleteResults *ResultsIn) {
AllocatedCXCodeCompleteResults *Results
= static_cast<AllocatedCXCodeCompleteResults*>(ResultsIn);
if (!Results)
return 0;
return Results->Diagnostics.size();
}
CXDiagnostic
clang_codeCompleteGetDiagnostic(CXCodeCompleteResults *ResultsIn,
unsigned Index) {
AllocatedCXCodeCompleteResults *Results
= static_cast<AllocatedCXCodeCompleteResults*>(ResultsIn);
if (!Results || Index >= Results->Diagnostics.size())
return nullptr;
CXStoredDiagnostic *Diag = Results->DiagnosticsWrappers[Index];
if (!Diag)
Results->DiagnosticsWrappers[Index] = Diag =
new CXStoredDiagnostic(Results->Diagnostics[Index], Results->LangOpts);
return Diag;
}
unsigned long long
clang_codeCompleteGetContexts(CXCodeCompleteResults *ResultsIn) {
AllocatedCXCodeCompleteResults *Results
= static_cast<AllocatedCXCodeCompleteResults*>(ResultsIn);
if (!Results)
return 0;
return Results->Contexts;
}
enum CXCursorKind clang_codeCompleteGetContainerKind(
CXCodeCompleteResults *ResultsIn,
unsigned *IsIncomplete) {
AllocatedCXCodeCompleteResults *Results =
static_cast<AllocatedCXCodeCompleteResults *>(ResultsIn);
if (!Results)
return CXCursor_InvalidCode;
if (IsIncomplete != nullptr) {
*IsIncomplete = Results->ContainerIsIncomplete;
}
return Results->ContainerKind;
}
CXString clang_codeCompleteGetContainerUSR(CXCodeCompleteResults *ResultsIn) {
AllocatedCXCodeCompleteResults *Results =
static_cast<AllocatedCXCodeCompleteResults *>(ResultsIn);
if (!Results)
return cxstring::createEmpty();
return cxstring::createRef(Results->ContainerUSR.c_str());
}
CXString clang_codeCompleteGetObjCSelector(CXCodeCompleteResults *ResultsIn) {
AllocatedCXCodeCompleteResults *Results =
static_cast<AllocatedCXCodeCompleteResults *>(ResultsIn);
if (!Results)
return cxstring::createEmpty();
return cxstring::createDup(Results->Selector);
}
/// Simple utility function that appends a \p New string to the given
/// \p Old string, using the \p Buffer for storage.
///
/// \param Old The string to which we are appending. This parameter will be
/// updated to reflect the complete string.
///
///
/// \param New The string to append to \p Old.
///
/// \param Buffer A buffer that stores the actual, concatenated string. It will
/// be used if the old string is already-non-empty.
static void AppendToString(StringRef &Old, StringRef New,
SmallString<256> &Buffer) {
if (Old.empty()) {
Old = New;
return;
}
if (Buffer.empty())
Buffer.append(Old.begin(), Old.end());
Buffer.append(New.begin(), New.end());
Old = Buffer.str();
}
/// Get the typed-text blocks from the given code-completion string
/// and return them as a single string.
///
/// \param String The code-completion string whose typed-text blocks will be
/// concatenated.
///
/// \param Buffer A buffer used for storage of the completed name.
static StringRef GetTypedName(CodeCompletionString *String,
SmallString<256> &Buffer) {
StringRef Result;
for (CodeCompletionString::iterator C = String->begin(), CEnd = String->end();
C != CEnd; ++C) {
if (C->Kind == CodeCompletionString::CK_TypedText)
AppendToString(Result, C->Text, Buffer);
}
return Result;
}
namespace {
struct OrderCompletionResults {
bool operator()(const CXCompletionResult &XR,
const CXCompletionResult &YR) const {
CodeCompletionString *X
= (CodeCompletionString *)XR.CompletionString;
CodeCompletionString *Y
= (CodeCompletionString *)YR.CompletionString;
SmallString<256> XBuffer;
StringRef XText = GetTypedName(X, XBuffer);
SmallString<256> YBuffer;
StringRef YText = GetTypedName(Y, YBuffer);
if (XText.empty() || YText.empty())
return !XText.empty();
int result = XText.compare_lower(YText);
if (result < 0)
return true;
if (result > 0)
return false;
result = XText.compare(YText);
return result < 0;
}
};
}
void clang_sortCodeCompletionResults(CXCompletionResult *Results,
unsigned NumResults) {
std::stable_sort(Results, Results + NumResults, OrderCompletionResults());
}
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