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

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//===- CIndexCodeCompletion.cpp - Code Completion API hooks ---------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// 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 "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/Frontend/FrontendDiagnostic.h"
#include "clang/Sema/CodeCompleteConsumer.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/Atomic.h"
#include "llvm/Support/CrashRecoveryContext.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/Timer.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdio>
#include <cstdlib>
#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::cxstring;
using namespace clang::cxindex;
extern "C" {
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 createCXString((*CCStr)[chunk_number].Text, false);
case CodeCompletionString::CK_Optional:
// Note: treated as an empty text block.
return createCXString("");
}
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 0;
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 0;
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 ? createCXString(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 createCXString(CCStr->getParentContextName(), /*DupString=*/false);
}
CXString
clang_getCompletionBriefComment(CXCompletionString completion_string) {
CodeCompletionString *CCStr = (CodeCompletionString *)completion_string;
if (!CCStr)
return cxstring::createNull();
return createCXString(CCStr->getBriefComment(), /*DupString=*/false);
}
namespace {
/// \brief The CXCodeCompleteResults structure we allocate internally;
/// the client only sees the initial CXCodeCompleteResults structure.
struct AllocatedCXCodeCompleteResults : public CXCodeCompleteResults {
AllocatedCXCodeCompleteResults(const FileSystemOptions& FileSystemOpts);
~AllocatedCXCodeCompleteResults();
/// \brief Diagnostics produced while performing code completion.
SmallVector<StoredDiagnostic, 8> Diagnostics;
IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts;
/// \brief Diag object
IntrusiveRefCntPtr<DiagnosticsEngine> Diag;
/// \brief Language options used to adjust source locations.
LangOptions LangOpts;
FileSystemOptions FileSystemOpts;
/// \brief File manager, used for diagnostics.
IntrusiveRefCntPtr<FileManager> FileMgr;
/// \brief Source manager, used for diagnostics.
IntrusiveRefCntPtr<SourceManager> SourceMgr;
/// \brief Temporary files that should be removed once we have finished
/// with the code-completion results.
std::vector<llvm::sys::Path> TemporaryFiles;
/// \brief Temporary buffers that will be deleted once we have finished with
/// the code-completion results.
SmallVector<const llvm::MemoryBuffer *, 1> TemporaryBuffers;
/// \brief Allocator used to store globally cached code-completion results.
IntrusiveRefCntPtr<clang::GlobalCodeCompletionAllocator>
CachedCompletionAllocator;
/// \brief Allocator used to store code completion results.
IntrusiveRefCntPtr<clang::GlobalCodeCompletionAllocator>
CodeCompletionAllocator;
/// \brief Context under which completion occurred.
enum clang::CodeCompletionContext::Kind ContextKind;
/// \brief A bitfield representing the acceptable completions for the
/// current context.
unsigned long long Contexts;
/// \brief The kind of the container for the current context for completions.
enum CXCursorKind ContainerKind;
/// \brief The USR of the container for the current context for completions.
CXString ContainerUSR;
/// \brief a boolean value indicating whether there is complete information
/// about the container
unsigned ContainerIsIncomplete;
/// \brief A string containing the Objective-C selector entered thus far for a
/// message send.
std::string Selector;
};
} // end anonymous namespace
/// \brief Tracks the number of code-completion result objects that are
/// currently active.
///
/// Used for debugging purposes only.
static llvm::sys::cas_flag CodeCompletionResultObjects;
AllocatedCXCodeCompleteResults::AllocatedCXCodeCompleteResults(
const FileSystemOptions& FileSystemOpts)
: CXCodeCompleteResults(),
DiagOpts(new DiagnosticOptions),
Diag(new DiagnosticsEngine(
IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs),
&*DiagOpts)),
FileSystemOpts(FileSystemOpts),
FileMgr(new FileManager(FileSystemOpts)),
SourceMgr(new SourceManager(*Diag, *FileMgr)),
CodeCompletionAllocator(new clang::GlobalCodeCompletionAllocator),
Contexts(CXCompletionContext_Unknown),
ContainerKind(CXCursor_InvalidCode),
ContainerUSR(createCXString("")),
ContainerIsIncomplete(1)
{
if (getenv("LIBCLANG_OBJTRACKING")) {
llvm::sys::AtomicIncrement(&CodeCompletionResultObjects);
fprintf(stderr, "+++ %d completion results\n", CodeCompletionResultObjects);
}
}
AllocatedCXCodeCompleteResults::~AllocatedCXCodeCompleteResults() {
delete [] Results;
clang_disposeString(ContainerUSR);
for (unsigned I = 0, N = TemporaryFiles.size(); I != N; ++I)
TemporaryFiles[I].eraseFromDisk();
for (unsigned I = 0, N = TemporaryBuffers.size(); I != N; ++I)
delete TemporaryBuffers[I];
if (getenv("LIBCLANG_OBJTRACKING")) {
llvm::sys::AtomicDecrement(&CodeCompletionResultObjects);
fprintf(stderr, "--- %d completion results\n", CodeCompletionResultObjects);
}
}
} // end extern "C"
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_PotentiallyQualifiedName: {
contexts = CXCompletionContext_NestedNameSpecifier;
break;
}
case CodeCompletionContext::CCC_MacroNameUse: {
contexts = CXCompletionContext_MacroName;
break;
}
case CodeCompletionContext::CCC_NaturalLanguage: {
contexts = CXCompletionContext_NaturalLanguage;
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_Name:
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() { Finish(); }
virtual void ProcessCodeCompleteResults(Sema &S,
CodeCompletionContext Context,
CodeCompletionResult *Results,
unsigned NumResults) {
StoredResults.reserve(StoredResults.size() + NumResults);
for (unsigned I = 0; I != NumResults; ++I) {
CodeCompletionString *StoredCompletion
= Results[I].CreateCodeCompletionString(S, getAllocator(),
getCodeCompletionTUInfo(),
includeBriefComments());
CXCompletionResult R;
R.CursorKind = Results[I].CursorKind;
R.CompletionString = StoredCompletion;
StoredResults.push_back(R);
}
enum CodeCompletionContext::Kind contextKind = Context.getKind();
AllocatedResults.ContextKind = contextKind;
AllocatedResults.Contexts = getContextsForContextKind(contextKind, S);
AllocatedResults.Selector = "";
if (Context.getNumSelIdents() > 0) {
for (unsigned i = 0; i < Context.getNumSelIdents(); i++) {
IdentifierInfo *selIdent = Context.getSelIdents()[i];
if (selIdent != NULL) {
StringRef selectorString = Context.getSelIdents()[i]->getName();
AllocatedResults.Selector += selectorString;
}
AllocatedResults.Selector += ":";
}
}
QualType baseType = Context.getBaseType();
NamedDecl *D = NULL;
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 != NULL) {
CXCursor cursor = cxcursor::MakeCXCursor(D, *TU);
CXCursorKind cursorKind = clang_getCursorKind(cursor);
CXString cursorUSR = clang_getCursorUSR(cursor);
// Normally, clients of CXString shouldn't care whether or not
// a CXString is managed by a pool or by explicitly malloc'ed memory.
// However, there are cases when AllocatedResults outlives the
// CXTranslationUnit. This is a workaround that failure mode.
if (cxstring::isManagedByPool(cursorUSR)) {
CXString heapStr =
cxstring::createCXString(clang_getCString(cursorUSR), true);
clang_disposeString(cursorUSR);
cursorUSR = heapStr;
}
AllocatedResults.ContainerKind = cursorKind;
AllocatedResults.ContainerUSR = cursorUSR;
const Type *type = baseType.getTypePtrOrNull();
if (type != NULL) {
AllocatedResults.ContainerIsIncomplete = type->isIncompleteType();
}
else {
AllocatedResults.ContainerIsIncomplete = 1;
}
}
else {
AllocatedResults.ContainerKind = CXCursor_InvalidCode;
AllocatedResults.ContainerUSR = createCXString("");
AllocatedResults.ContainerIsIncomplete = 1;
}
}
virtual void ProcessOverloadCandidates(Sema &S, unsigned CurrentArg,
OverloadCandidate *Candidates,
unsigned NumCandidates) {
StoredResults.reserve(StoredResults.size() + NumCandidates);
for (unsigned I = 0; I != NumCandidates; ++I) {
CodeCompletionString *StoredCompletion
= Candidates[I].CreateSignatureString(CurrentArg, S, getAllocator(),
getCodeCompletionTUInfo());
CXCompletionResult R;
R.CursorKind = CXCursor_NotImplemented;
R.CompletionString = StoredCompletion;
StoredResults.push_back(R);
}
}
virtual CodeCompletionAllocator &getAllocator() {
return *AllocatedResults.CodeCompletionAllocator;
}
virtual CodeCompletionTUInfo &getCodeCompletionTUInfo() { 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();
}
};
}
extern "C" {
struct CodeCompleteAtInfo {
CXTranslationUnit TU;
const char *complete_filename;
unsigned complete_line;
unsigned complete_column;
struct CXUnsavedFile *unsaved_files;
unsigned num_unsaved_files;
unsigned options;
CXCodeCompleteResults *result;
};
void clang_codeCompleteAt_Impl(void *UserData) {
CodeCompleteAtInfo *CCAI = static_cast<CodeCompleteAtInfo*>(UserData);
CXTranslationUnit TU = CCAI->TU;
const char *complete_filename = CCAI->complete_filename;
unsigned complete_line = CCAI->complete_line;
unsigned complete_column = CCAI->complete_column;
struct CXUnsavedFile *unsaved_files = CCAI->unsaved_files;
unsigned num_unsaved_files = CCAI->num_unsaved_files;
unsigned options = CCAI->options;
bool IncludeBriefComments = options & CXCodeComplete_IncludeBriefComments;
CCAI->result = 0;
#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") != 0;
ASTUnit *AST = cxtu::getASTUnit(TU);
if (!AST)
return;
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 (unsigned I = 0; I != num_unsaved_files; ++I) {
StringRef Data(unsaved_files[I].Contents, unsaved_files[I].Length);
const llvm::MemoryBuffer *Buffer
= llvm::MemoryBuffer::getMemBufferCopy(Data, unsaved_files[I].Filename);
RemappedFiles.push_back(std::make_pair(unsaved_files[I].Filename,
Buffer));
}
if (EnableLogging) {
// FIXME: Add logging.
}
// Parse the resulting source file to find code-completion results.
AllocatedCXCodeCompleteResults *Results =
new AllocatedCXCodeCompleteResults(AST->getFileSystemOpts());
Results->Results = 0;
Results->NumResults = 0;
// Create a code-completion consumer to capture the results.
CodeCompleteOptions Opts;
Opts.IncludeBriefComments = IncludeBriefComments;
CaptureCompletionResults Capture(Opts, *Results, &TU);
// Perform completion.
AST->CodeComplete(complete_filename, complete_line, complete_column,
RemappedFiles.data(), RemappedFiles.size(),
(options & CXCodeComplete_IncludeMacros),
(options & CXCodeComplete_IncludeCodePatterns),
IncludeBriefComments,
Capture,
*Results->Diag, Results->LangOpts, *Results->SourceMgr,
*Results->FileMgr, Results->Diagnostics,
Results->TemporaryBuffers);
// 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
CCAI->result = 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;
}
CodeCompleteAtInfo CCAI = { TU, complete_filename, complete_line,
complete_column, unsaved_files, num_unsaved_files,
options, 0 };
if (getenv("LIBCLANG_NOTHREADS")) {
clang_codeCompleteAt_Impl(&CCAI);
return CCAI.result;
}
llvm::CrashRecoveryContext CRC;
if (!RunSafely(CRC, clang_codeCompleteAt_Impl, &CCAI)) {
fprintf(stderr, "libclang: crash detected in code completion\n");
cxtu::getASTUnit(TU)->setUnsafeToFree(true);
return 0;
} else if (getenv("LIBCLANG_RESOURCE_USAGE"))
PrintLibclangResourceUsage(TU);
return CCAI.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 0;
return new CXStoredDiagnostic(Results->Diagnostics[Index], Results->LangOpts);
}
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 != NULL) {
*IsIncomplete = Results->ContainerIsIncomplete;
}
return Results->ContainerKind;
}
CXString clang_codeCompleteGetContainerUSR(CXCodeCompleteResults *ResultsIn) {
AllocatedCXCodeCompleteResults *Results =
static_cast<AllocatedCXCodeCompleteResults *>(ResultsIn);
if (!Results)
return createCXString("");
return createCXString(clang_getCString(Results->ContainerUSR));
}
CXString clang_codeCompleteGetObjCSelector(CXCodeCompleteResults *ResultsIn) {
AllocatedCXCodeCompleteResults *Results =
static_cast<AllocatedCXCodeCompleteResults *>(ResultsIn);
if (!Results)
return createCXString("");
return createCXString(Results->Selector);
}
} // end extern "C"
/// \brief 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();
}
/// \brief 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;
}
};
}
extern "C" {
void clang_sortCodeCompletionResults(CXCompletionResult *Results,
unsigned NumResults) {
std::stable_sort(Results, Results + NumResults, OrderCompletionResults());
}
}
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