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ClangIndexer.cpp
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/* This file is part of RTags (http://rtags.net).
RTags is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
RTags is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with RTags. If not, see <http://www.gnu.org/licenses/>. */
#define RTAGS_SINGLE_THREAD
#include <rct/SHA256.h>
#include "ClangIndexer.h"
#include "Diagnostic.h"
#include "QueryMessage.h"
#include "VisitFileMessage.h"
#include "VisitFileResponseMessage.h"
#include "FileMap.h"
#include <rct/Connection.h>
#include <rct/EventLoop.h>
#include "RTags.h"
#include "Diagnostic.h"
#include "RClient.h"
#include <unistd.h>
#if CINDEX_VERSION >= CINDEX_VERSION_ENCODE(0, 25)
#include <clang-c/Documentation.h>
#endif
static const CXSourceLocation nullLocation = clang_getNullLocation();
static const CXCursor nullCursor = clang_getNullCursor();
static inline String usr(const CXCursor &cursor)
{
return RTags::eatString(clang_getCursorUSR(clang_getCanonicalCursor(cursor)));
}
struct VerboseVisitorUserData {
int indent;
String out;
ClangIndexer *indexer;
};
static inline void setType(Symbol &symbol, const CXType &type)
{
symbol.type = type.kind;
const String str = RTags::eatString(clang_getTypeSpelling(type));
symbol.typeName = str;
}
Flags<Server::Option> ClangIndexer::sServerOpts;
ClangIndexer::ClangIndexer()
: mClangUnit(0), mIndex(0), mLastCursor(nullCursor), mVisitFileResponseMessageFileId(0),
mVisitFileResponseMessageVisit(0), mParseDuration(0), mVisitDuration(0),
mBlocked(0), mAllowed(0), mIndexed(1), mVisitFileTimeout(0),
mIndexDataMessageTimeout(0), mFileIdsQueried(0), mLogFile(0),
mConnection(Connection::create(RClient::NumOptions))
{
mConnection->newMessage().connect(std::bind(&ClangIndexer::onMessage, this,
std::placeholders::_1, std::placeholders::_2));
}
ClangIndexer::~ClangIndexer()
{
if (mLogFile)
fclose(mLogFile);
if (mClangUnit)
clang_disposeTranslationUnit(mClangUnit);
if (mIndex)
clang_disposeIndex(mIndex);
}
bool ClangIndexer::exec(const String &data)
{
Deserializer deserializer(data);
uint16_t protocolVersion;
deserializer >> protocolVersion;
if (protocolVersion != RTags::DatabaseVersion) {
error("Wrong protocol %d vs %d", protocolVersion, RTags::DatabaseVersion);
return false;
}
uint64_t id;
String socketFile;
Flags<IndexerJob::Flag> indexerJobFlags;
uint32_t connectTimeout, connectAttempts;
int32_t niceValue;
Hash<uint32_t, Path> blockedFiles;
String dataDir;
deserializer >> id;
deserializer >> socketFile;
deserializer >> mProject;
deserializer >> mSource;
deserializer >> mSourceFile;
deserializer >> indexerJobFlags;
deserializer >> mVisitFileTimeout;
deserializer >> mIndexDataMessageTimeout;
deserializer >> connectTimeout;
deserializer >> connectAttempts;
deserializer >> niceValue;
deserializer >> sServerOpts;
deserializer >> mUnsavedFiles;
deserializer >> dataDir;
deserializer >> blockedFiles;
#if 0
while (true) {
FILE *f = fopen((String("/tmp/stop_") + mSourceFile.fileName()).constData(), "r+");
if (f) {
fseek(f, 0, SEEK_END);
fprintf(f, "Waiting ... %d\n", getpid());
fclose(f);
sleep(1);
} else {
break;
}
}
#endif
const uint64_t parseTime = Rct::currentTimeMs();
if (niceValue != INT_MIN) {
errno = 0;
if (nice(niceValue) == -1) {
error() << "Failed to nice rp" << Rct::strerror();
}
}
if (mSourceFile.isEmpty()) {
error("No sourcefile");
return false;
}
if (!mSource.fileId) {
error("Bad fileId");
return false;
}
if (mProject.isEmpty()) {
error("No project");
return false;
}
Location::init(blockedFiles);
Location::set(mSourceFile, mSource.fileId);
while (true) {
if (mConnection->connectUnix(socketFile, connectTimeout))
break;
if (!--connectAttempts) {
error("Failed to connect to rdm on %s (%dms timeout)", socketFile.constData(), connectTimeout);
return false;
}
usleep(500 * 1000);
}
// mLogFile = fopen(String::format("/tmp/%s", mSourceFile.fileName()).constData(), "w");
mIndexDataMessage.setProject(mProject);
mIndexDataMessage.setIndexerJobFlags(indexerJobFlags);
mIndexDataMessage.setParseTime(parseTime);
mIndexDataMessage.setKey(mSource.key());
mIndexDataMessage.setId(id);
assert(mConnection->isConnected());
mIndexDataMessage.files()[mSource.fileId] |= IndexDataMessage::Visited;
parse() && visit() && diagnose();
String message = mSourceFile.toTilde();
String err;
StopWatch sw;
int writeDuration = -1;
if (!mClangUnit || !writeFiles(RTags::encodeSourceFilePath(dataDir, mProject, 0), err)) {
message += " error";
if (!err.isEmpty())
message += (' ' + err);
} else {
writeDuration = sw.elapsed();
}
message += String::format<16>(" in %lldms. ", mTimer.elapsed());
int cursorCount = 0;
int symbolNameCount = 0;
for (const auto &unit : mUnits) {
cursorCount += unit.second->symbols.size();
symbolNameCount += unit.second->symbolNames.size();
}
if (mClangUnit) {
const char *format = "(%d syms, %d symNames, %d includes, %d of %d files, symbols: %d of %d, %d queried) (%d/%d/%dms)";
message += String::format<128>(format, cursorCount, symbolNameCount,
mIndexDataMessage.includes().size(), mIndexed,
mIndexDataMessage.files().size(), mAllowed,
mAllowed + mBlocked, mFileIdsQueried,
mParseDuration, mVisitDuration, writeDuration);
}
if (mIndexDataMessage.indexerJobFlags() & IndexerJob::Dirty)
message += " (dirty)";
++mFileIdsQueried;
mIndexDataMessage.setMessage(message);
sw.restart();
if (!mConnection->send(mIndexDataMessage)) {
error() << "Couldn't send IndexDataMessage" << mSourceFile;
return false;
}
mConnection->finished().connect(std::bind(&EventLoop::quit, EventLoop::eventLoop()));
if (EventLoop::eventLoop()->exec(mIndexDataMessageTimeout) == EventLoop::Timeout) {
error() << "Timed out sending IndexDataMessage" << mSourceFile;
return false;
}
if (getenv("RDM_DEBUG_INDEXERMESSAGE"))
error() << "Send took" << sw.elapsed() << "for" << mSourceFile;
return true;
}
void ClangIndexer::onMessage(const std::shared_ptr<Message> &msg, const std::shared_ptr<Connection> &/*conn*/)
{
assert(msg->messageId() == VisitFileResponseMessage::MessageId);
const std::shared_ptr<VisitFileResponseMessage> vm = std::static_pointer_cast<VisitFileResponseMessage>(msg);
mVisitFileResponseMessageVisit = vm->visit();
mVisitFileResponseMessageFileId = vm->fileId();
assert(EventLoop::eventLoop());
EventLoop::eventLoop()->quit();
}
Location ClangIndexer::createLocation(const Path &sourceFile, unsigned int line, unsigned int col, bool *blockedPtr)
{
uint32_t id = Location::fileId(sourceFile);
Path resolved;
if (!id) {
bool ok;
for (int i=0; i<4; ++i) {
resolved = sourceFile.resolved(Path::RealPath, Path(), &ok);
// if ok is false it means the file is gone, in case this happens
// during a git pull or something we'll give it a couple of chances.
if (ok)
break;
usleep(50000);
}
if (!ok)
return Location();
id = Location::fileId(resolved);
if (id)
Location::set(sourceFile, id);
}
assert(!resolved.contains("/../"));
if (id) {
if (blockedPtr) {
Hash<uint32_t, Flags<IndexDataMessage::FileFlag> >::iterator it = mIndexDataMessage.files().find(id);
if (it == mIndexDataMessage.files().end()) {
// the only reason we already have an id for a file that isn't
// in the mIndexDataMessage.mFiles is that it's blocked from the outset.
// The assumption is that we never will go and fetch a file id
// for a location without passing blockedPtr since any reference
// to a symbol in another file should have been preceded by that
// header in which case we would have to make a decision on
// whether or not to index it. This is a little hairy but we
// have to try to optimize this process.
#ifndef NDEBUG
if (resolved.isEmpty())
resolved = sourceFile.resolved();
#endif
mIndexDataMessage.files()[id] = IndexDataMessage::NoFileFlag;
*blockedPtr = true;
return Location();
} else if (!it->second) {
*blockedPtr = true;
return Location();
}
}
return Location(id, line, col);
}
++mFileIdsQueried;
VisitFileMessage msg(resolved, mProject, mIndexDataMessage.key());
mVisitFileResponseMessageFileId = UINT_MAX;
mVisitFileResponseMessageVisit = false;
mConnection->send(msg);
StopWatch sw;
EventLoop::eventLoop()->exec(mVisitFileTimeout);
switch (mVisitFileResponseMessageFileId) {
case 0:
return Location();
case UINT_MAX:
// timed out.
if (mVisitFileResponseMessageFileId == UINT_MAX) {
error() << "Error getting fileId for" << resolved << mLastCursor
<< sw.elapsed() << mVisitFileTimeout;
}
exit(1);
default:
id = mVisitFileResponseMessageFileId;
break;
}
Flags<IndexDataMessage::FileFlag> &flags = mIndexDataMessage.files()[id];
if (mVisitFileResponseMessageVisit) {
flags |= IndexDataMessage::Visited;
++mIndexed;
}
// fprintf(mLogFile, "%s %s\n", file.second ? "WON" : "LOST", resolved.constData());
Location::set(resolved, id);
if (resolved != sourceFile)
Location::set(sourceFile, id);
if (blockedPtr && !mVisitFileResponseMessageVisit) {
*blockedPtr = true;
return Location();
}
return Location(id, line, col);
}
static inline void tokenize(const char *buf, int start,
int *templateStart, int *templateEnd,
int *sectionCount, int sections[512])
{
int templateCount = 0;
*templateStart = *templateEnd = -1;
*sectionCount = 1;
sections[0] = start;
int functionStart = -1;
int functionEnd = -1;
int idx = start;
while (true) {
switch (buf[++idx]) {
case '<':
if (buf[idx + 1] == '<') {
++idx;
} else if (functionStart == -1 && (idx - 8 < 0 || strncmp("operator", buf + idx - 8, 8) != 0)) {
if (!templateCount++)
*templateStart = idx;
}
break;
case '>':
if (buf[idx + 1] == '>') {
++idx;
} else if (functionStart == -1 && (idx - 8 < 0 || strncmp("operator", buf + idx - 8, 8) != 0)) {
if (!--templateCount)
*templateEnd = idx;
}
break;
case '(':
if (!templateCount)
functionStart = idx;
break;
case ')':
if (!templateCount)
functionEnd = idx;
break;
case ':':
if (!templateCount && (functionStart == -1 || functionEnd != -1)) {
if (buf[idx + 1] == ':') {
sections[(*sectionCount)++] = idx + 2;
++idx;
} else {
sections[(*sectionCount)++] = idx + 1;
}
}
break;
case '\0':
return;
}
}
}
String ClangIndexer::addNamePermutations(const CXCursor &cursor, const Location &location,
RTags::CursorType cursorType)
{
CXCursorKind kind = clang_getCursorKind(cursor);
const CXCursorKind originalKind = kind;
char buf[32768];
int pos = sizeof(buf) - 1;
buf[pos] = '\0';
int cutoff = -1;
CXCursor c = cursor;
do {
CXStringScope displayName(clang_getCursorDisplayName(c));
const char *name = displayName.data();
if (!name)
break;
const int len = strlen(name);
if (!len)
break;
if (pos != sizeof(buf) - 1 && (pos -= 2) >= 0) {
memset(buf + pos, ':', 2);
}
pos -= len;
if (pos < 0) {
error("SymbolName too long. Giving up");
return String();
}
memcpy(buf + pos, name, len);
c = clang_getCursorSemanticParent(c);
kind = clang_getCursorKind(c);
if (cutoff == -1) {
switch (kind) {
case CXCursor_ClassDecl:
case CXCursor_ClassTemplate:
case CXCursor_StructDecl:
break;
case CXCursor_Namespace:
// namespaces can include all namespaces in their symbolname
if (originalKind == CXCursor_Namespace)
break;
default:
cutoff = pos;
break;
}
}
} while (RTags::needsQualifiers(kind));
String type;
switch (originalKind) {
case CXCursor_StructDecl:
type = "struct ";
break;
case CXCursor_ClassDecl:
case CXCursor_ClassTemplate:
type = "class ";
break;
case CXCursor_Namespace:
type = "namespace ";
break;
case CXCursor_Destructor:
case CXCursor_Constructor:
break;
default: {
type = RTags::eatString(clang_getTypeSpelling(clang_getCursorType(cursor)));
const int paren = type.indexOf('(');
if (paren != -1) {
type.resize(paren);
} else if (!type.isEmpty() && !type.endsWith('*') && !type.endsWith('&')) {
type.append(' ');
}
break; }
}
if (cutoff == -1)
cutoff = pos;
String ret;
if (cursorType == RTags::Type_Reference) {
if (!type.isEmpty()) {
ret = type;
ret.append(buf + cutoff, sizeof(buf) - cutoff - 1);
} else {
ret.assign(buf + cutoff, sizeof(buf) - cutoff - 1);
}
return ret;
}
int templateStart, templateEnd, colonColonCount;
int colonColons[512];
::tokenize(buf, pos,
&templateStart, &templateEnd,
&colonColonCount, colonColons);
// i == 0 --> with templates,
// i == 1 without templates or without EnumConstantDecl part
for (int i=0; i<2; ++i) {
for (int j=0; j<colonColonCount; ++j) {
const char *ch = buf + colonColons[j];
const String name(ch, sizeof(buf) - (ch - buf) - 1);
unit(location.fileId())->symbolNames[name].insert(location);
if (!type.isEmpty() && (originalKind != CXCursor_ParmDecl || !strchr(ch, '('))) {
// We only want to add the type to the final declaration for ParmDecls
// e.g.
// void foo(int)::bar
// and
// int bar
//
// not
// int void foo(int)::bar
// or
// void foo(int)::int bar
unit(location.fileId())->symbolNames[type + name].insert(location);
}
}
if (i == 0) {
// create actual symbol name that will go into SymbolInfo. This doesn't include namespaces etc
if (!type.isEmpty()) {
ret = type;
ret.append(buf + cutoff, sizeof(buf) - cutoff - 1);
} else {
ret.assign(buf + cutoff, sizeof(buf) - cutoff - 1);
}
}
if (i == 1 || (templateStart == -1 && originalKind != CXCursor_EnumConstantDecl)) {
// nothing more to do
break;
}
if (originalKind == CXCursor_EnumConstantDecl) { // remove CXCursor_EnumDecl
// struct A { enum B { C } };
// Will by default generate a A::B::C symbolname.
// This code removes the B:: part from it
if (colonColonCount > 2) {
const char *last = buf + colonColons[colonColonCount - 1];
const char *secondLast = buf + colonColons[colonColonCount - 2];
const int len = (last - secondLast);
memmove(buf + pos + len, buf + pos, secondLast - (buf + pos));
pos += len;
}
} else { // remove templates
assert(templateStart != -1);
assert(templateEnd != -1);
const int templateSize = (templateEnd - templateStart) + 1;
memmove(buf + pos + templateSize, buf + pos, (buf + templateStart) - (buf + pos));
pos += templateSize;
}
// ### We could/should just move the colon colon values but this
// should be pretty quick and I don't want to write the code to
// do it.
::tokenize(buf, pos,
&templateStart, &templateEnd,
&colonColonCount, colonColons);
}
return ret;
}
static inline CXCursor findDestructorForDelete(const CXCursor &deleteStatement)
{
const CXCursor child = RTags::findFirstChild(deleteStatement);
CXCursorKind kind = clang_getCursorKind(child);
switch (kind) {
case CXCursor_UnexposedExpr:
case CXCursor_CallExpr:
break;
default:
return nullCursor;
}
const CXCursor var = clang_getCursorReferenced(child);
kind = clang_getCursorKind(var);
switch (kind) {
case CXCursor_ObjCIvarDecl:
case CXCursor_VarDecl:
case CXCursor_FieldDecl:
case CXCursor_ParmDecl:
case CXCursor_CXXMethod:
case CXCursor_FunctionDecl:
case CXCursor_ConversionFunction:
break;
default:
if (!clang_isInvalid(kind)) {
error() << "Got unexpected cursor" << deleteStatement << var;
// assert(0);
}
return nullCursor;
}
CXCursor ref = RTags::findChild(var, CXCursor_TypeRef);
if (ref != CXCursor_TypeRef)
ref = RTags::findChild(var, CXCursor_TemplateRef);
kind = clang_getCursorKind(ref);
switch (kind) {
case CXCursor_TypeRef:
case CXCursor_TemplateRef:
break;
default:
return nullCursor;
}
const CXCursor referenced = clang_getCursorReferenced(ref);
kind = clang_getCursorKind(referenced);
switch (kind) {
case CXCursor_StructDecl:
case CXCursor_ClassDecl:
case CXCursor_ClassTemplate:
break;
default:
return nullCursor;
}
const CXCursor destructor = RTags::findChild(referenced, CXCursor_Destructor);
return destructor;
}
template <typename T>
struct Updater
{
Updater(T &var, const T &newValue) : mVar(var), mNewValue(newValue) {}
~Updater() { mVar = mNewValue; }
T &mVar;
const T mNewValue;
};
CXChildVisitResult ClangIndexer::indexVisitor(CXCursor cursor, CXCursor parent, CXClientData data)
{
ClangIndexer *indexer = static_cast<ClangIndexer*>(data);
// error() << "indexVisitor" << cursor;
// FILE *f = fopen("/tmp/clangindex.log", "a");
// String str;
// Log(&str) << cursor;
// fwrite(str.constData(), 1, str.size(), f);
// fwrite("\n", 1, 1, f);
// fclose(f);
const Updater<CXCursor> lastCursorUpdater(indexer->mLastCursor, cursor);
const CXCursorKind kind = clang_getCursorKind(cursor);
const RTags::CursorType type = RTags::cursorType(kind);
if (type == RTags::Type_Other) {
indexer->mLastLocation.clear();
return CXChildVisit_Recurse;
}
bool blocked = false;
Location loc = indexer->createLocation(cursor, &blocked);
const Updater<Location> lastLocationUpdater(indexer->mLastLocation, loc);
if (blocked) {
// error() << "blocked" << cursor;
++indexer->mBlocked;
return CXChildVisit_Continue;
} else if (loc.isNull()) {
// error() << "Got null" << cursor;
return CXChildVisit_Recurse;
}
++indexer->mAllowed;
if (indexer->mLogFile) {
String out;
Log(&out) << cursor;
fwrite(out.constData(), 1, out.size(), indexer->mLogFile);
fwrite("\n", 1, 1, indexer->mLogFile);
}
if (testLog(LogLevel::VerboseDebug)) {
Log log(LogLevel::VerboseDebug);
log << cursor;
CXCursor ref = clang_getCursorReferenced(cursor);
if (!clang_isInvalid(clang_getCursorKind(ref)) && !clang_equalCursors(ref, cursor)) {
log << "refs" << ref;
}
}
if (Symbol::isClass(kind)) {
indexer->mLastClass = loc;
} else {
if (kind == CXCursor_CXXBaseSpecifier) {
indexer->handleBaseClassSpecifier(cursor);
indexer->mLastLocation.clear();
return CXChildVisit_Recurse;
}
}
switch (type) {
case RTags::Type_Cursor:
indexer->handleCursor(cursor, kind, loc);
break;
case RTags::Type_Include:
indexer->handleInclude(cursor, kind, loc);
break;
case RTags::Type_Reference:
switch (kind) {
case CXCursor_OverloadedDeclRef: {
const int count = clang_getNumOverloadedDecls(cursor);
for (int i=0; i<count; ++i) {
const CXCursor ref = clang_getOverloadedDecl(cursor, i);
indexer->handleReference(cursor, kind, loc, ref, parent);
}
break; }
case CXCursor_CXXDeleteExpr:
indexer->handleReference(cursor, kind, loc, findDestructorForDelete(cursor), parent);
break;
case CXCursor_CallExpr: {
// uglehack, see rtags/tests/nestedClassConstructorCallUgleHack/
const CXCursor ref = clang_getCursorReferenced(cursor);
if (clang_getCursorKind(ref) == CXCursor_Constructor
&& (clang_getCursorKind(indexer->mLastCursor) == CXCursor_TypeRef
|| clang_getCursorKind(indexer->mLastCursor) == CXCursor_TemplateRef)
&& clang_getCursorKind(parent) != CXCursor_VarDecl) {
loc = indexer->createLocation(indexer->mLastCursor);
indexer->handleReference(indexer->mLastCursor, kind, loc, ref, parent);
} else {
indexer->handleReference(cursor, kind, loc, ref, parent);
}
break; }
default:
indexer->handleReference(cursor, kind, loc, clang_getCursorReferenced(cursor), parent);
break;
}
break;
case RTags::Type_Other:
assert(0);
break;
}
return CXChildVisit_Recurse;
}
static inline bool isImplicit(const CXCursor &cursor)
{
return clang_equalLocations(clang_getCursorLocation(cursor),
clang_getCursorLocation(clang_getCursorSemanticParent(cursor)));
}
bool ClangIndexer::superclassTemplateMemberFunctionUgleHack(const CXCursor &cursor, CXCursorKind kind,
const Location &location, const CXCursor &/*ref*/,
const CXCursor &parent, Symbol **cursorPtr)
{
// This is for references to superclass template functions. Awful awful
// shit. See https://github.com/Andersbakken/rtags/issues/62 and commit
// for details. I really should report this as a bug.
if (cursorPtr)
*cursorPtr = 0;
if (kind != CXCursor_MemberRefExpr && clang_getCursorKind(parent) != CXCursor_CallExpr)
return false;
const CXCursor templateRef = RTags::findChild(cursor, CXCursor_TemplateRef);
if (templateRef != CXCursor_TemplateRef)
return false;
const CXCursor classTemplate = clang_getCursorReferenced(templateRef);
if (classTemplate != CXCursor_ClassTemplate)
return false;
FILE *f = fopen(location.path().constData(), "r");
if (!f)
return false;
const CXSourceRange range = clang_getCursorExtent(cursor);
const CXSourceLocation end = clang_getRangeEnd(range);
unsigned int offset;
clang_getSpellingLocation(end, 0, 0, 0, &offset);
String name;
while (offset > 0) {
fseek(f, --offset, SEEK_SET);
char ch = static_cast<char>(fgetc(f));
if (isalnum(ch) || ch == '_' || ch == '~') {
name.prepend(ch);
} else {
break;
}
}
fclose(f);
if (!name.isEmpty()) {
RTags::Filter out;
out.kinds.insert(CXCursor_MemberRefExpr);
const int argCount = RTags::children(parent, RTags::Filter(), out).size();
RTags::Filter in(RTags::Filter::And);
in.names.insert(name);
in.argumentCount = argCount;
const List<CXCursor> alternatives = RTags::children(classTemplate, in);
switch (alternatives.size()) {
case 1:
// ### not sure this is correct with line/col
return handleReference(cursor, kind,
Location(location.fileId(), location.line(), location.column() + 1),
alternatives.first(), parent, cursorPtr);
break;
case 0:
break;
default:
warning() << "Can't decide which of these symbols are right for me"
<< cursor << alternatives
<< "Need to parse types";
break;
}
}
return false;
}
bool ClangIndexer::handleReference(const CXCursor &cursor, CXCursorKind kind,
const Location &location, CXCursor ref,
const CXCursor &parent, Symbol **cursorPtr)
{
if (cursorPtr)
*cursorPtr = 0;
// error() << "handleReference" << cursor << kind << location << ref;
const CXCursorKind refKind = clang_getCursorKind(ref);
if (clang_isInvalid(refKind)) {
return superclassTemplateMemberFunctionUgleHack(cursor, kind, location, ref, parent, cursorPtr);
}
bool isOperator = false;
if (kind == CXCursor_CallExpr && (refKind == CXCursor_CXXMethod
|| refKind == CXCursor_ConversionFunction
|| refKind == CXCursor_FunctionDecl
|| refKind == CXCursor_FunctionTemplate)) {
// These are bullshit. for this construct:
// foo.bar();
// the position of the cursor is at the foo, not the bar.
// They are not interesting for followLocation, renameSymbol or find
// references so we toss them.
// For functions it can be the position of the namespace.
// E.g. Foo::bar(); cursor is on Foo
// For constructors they happen to be the only thing we have that
// actually refs the constructor and not the class so we have to keep
// them for that.
return false;
}
Location refLoc = createLocation(ref);
if (!refLoc.isValid()) {
// ### THIS IS NOT SOLVED
// if (kind == CXCursor_ObjCMessageExpr) {
// mIndexDataMessage.mPendingReferenceMap[RTags::eatString(clang_getCursorUSR(clang_getCanonicalCursor(ref)))].insert(location);
// // insert it, we'll hook up the target and references later
// return handleCursor(cursor, kind, location, cursorPtr);
// }
return false;
}
switch (refKind) {
case CXCursor_Constructor:
case CXCursor_CXXMethod:
case CXCursor_FunctionDecl:
case CXCursor_Destructor:
case CXCursor_FunctionTemplate: {
while (true) {
const CXCursor general = clang_getSpecializedCursorTemplate(ref);
if (!clang_Cursor_isNull(general) && createLocation(general) == refLoc) {
ref = general;
} else {
break;
}
}
if (refKind == CXCursor_FunctionDecl)
break;
if (refKind == CXCursor_Constructor || refKind == CXCursor_Destructor) {
if (isImplicit(ref))
return false;
} else {
CXStringScope scope = clang_getCursorDisplayName(ref);
const char *data = scope.data();
if (data) {
const int len = strlen(data);
if (len > 8 && !strncmp(data, "operator", 8) && !isalnum(data[8]) && data[8] != '_') {
if (isImplicit(ref))
return false; // eat implicit operator calls
isOperator = true;
}
}
}
break; }
default:
break;
}
const String refUsr = usr(ref);
if (refUsr.isEmpty()) {
return false;
}
bool reffedCursorFound;
auto reffedCursor = findSymbol(refLoc, &reffedCursorFound);
Map<String, uint16_t> &targets = unit(location)->targets[location];
uint16_t refTargetValue;
if (reffedCursorFound) {
refTargetValue = reffedCursor.targetsValue();
} else {
refTargetValue = RTags::createTargetsValue(refKind, clang_isCursorDefinition(ref));
}
assert(!refUsr.isEmpty());
targets[refUsr] = refTargetValue;
Symbol &c = unit(location)->symbols[location];
if (cursorPtr)
*cursorPtr = &c;
// We need the new cursor to replace the symbolLength. This is important
// in the following case:
// struct R { R(const &r); ... }
// R foo();
// ...
// R r = foo();
// The first cursor on foo() will be a reference to the copy constructor and
// this cursor will have a symbolLength of 1. Thus you won't be able to jump
// to foo from the o. This is fixed by making sure the newer target, if
// better, gets to decide on the symbolLength
// The !isCursor is var decls and field decls where we set up a target even
// if they're not considered references
if (!c.isNull()) {
if (RTags::isCursor(c.kind))
return true;
auto best = targets.end();
int bestRank = -1;
for (auto it = targets.begin(); it != targets.end(); ++it) {
const int r = RTags::targetRank(RTags::targetsValueKind(it->second));
if (r > bestRank || (r == bestRank && RTags::targetsValueIsDefinition(it->second))) {
bestRank = r;
best = it;
}
}
if (best != targets.end() && best->first != refUsr) { // another target is better
return true;
}
}
CXSourceRange range = clang_getCursorExtent(cursor);
CXSourceLocation rangeStart = clang_getRangeStart(range);
CXSourceLocation rangeEnd = clang_getRangeEnd(range);
unsigned int startLine, startColumn, endLine, endColumn;
clang_getSpellingLocation(rangeStart, 0, &startLine, &startColumn, 0);
clang_getSpellingLocation(rangeEnd, 0, &endLine, &endColumn, 0);
c.startLine = startLine;
c.endLine = endLine;
c.startColumn = startColumn;
c.endColumn = endColumn;
c.definition = false;
c.kind = kind;
c.location = location;
c.symbolName = reffedCursorFound ? reffedCursor.symbolName : addNamePermutations(ref, refLoc, RTags::Type_Reference);
if (isOperator) {
unsigned int start, end;
clang_getSpellingLocation(rangeStart, 0, 0, 0, &start);
clang_getSpellingLocation(rangeEnd, 0, 0, 0, &end);
c.symbolLength = end - start;
} else {
c.symbolLength = reffedCursorFound ? reffedCursor.symbolLength : symbolLength(refKind, ref);
}
if (!c.symbolLength) {
unit(location)->symbols.remove(location);
if (cursorPtr)
*cursorPtr = 0;
return false;
}
setType(c, clang_getCursorType(cursor));
return true;
}
void ClangIndexer::addOverriddenCursors(const CXCursor &cursor, const Location &location)
{
// error() << "addOverriddenCursors" << cursor << location;
CXCursor *overridden;
unsigned int count;
clang_getOverriddenCursors(cursor, &overridden, &count);
if (!overridden)
return;
for (unsigned int i=0; i<count; ++i) {
// error() << location << "got" << i << count << loc;
const String usr = ::usr(overridden[i]);
assert(!usr.isEmpty());
// assert(!locCursor.usr.isEmpty());
// error() << location << "targets" << overridden[i];
unit(location)->targets[location][usr] = 0;
addOverriddenCursors(overridden[i], location);
}
clang_disposeOverriddenCursors(overridden);
}
void ClangIndexer::handleInclude(const CXCursor &cursor, CXCursorKind kind, const Location &location)
{
assert(kind == CXCursor_InclusionDirective);
(void)kind;
CXFile includedFile = clang_getIncludedFile(cursor);
if (includedFile) {
const Location refLoc = createLocation(includedFile, 1, 1);
if (!refLoc.isNull()) {
Symbol &c = unit(location)->symbols[location];
if (!c.isNull())
return;
String include = "#include ";
const Path path = refLoc.path();
assert(mSource.fileId);
unit(location)->symbolNames[(include + path)].insert(location);
unit(location)->symbolNames[(include + path.fileName())].insert(location);
mIndexDataMessage.includes().push_back(std::make_pair(location.fileId(), refLoc.fileId()));
c.symbolName = "#include " + RTags::eatString(clang_getCursorDisplayName(cursor));
c.kind = cursor.kind;
c.symbolLength = c.symbolName.size() + 2;
c.location = location;
unit(location)->targets[location][refLoc.path()] = 0; // ### what targets value to create for this?
// this fails for things like:
// # include <foobar.h>
return;
}
}
error() << "couldn't create included file" << cursor;
}
void ClangIndexer::handleBaseClassSpecifier(const CXCursor &cursor)
{
auto &lastClass = unit(mLastClass)->symbols[mLastClass];
if (!lastClass.isClass()) {
// this happens with some weird macros in /usr/include/dispatch/io.h:161:1 and others on Mac
// error() << "Couldn't find class for" << cursor << mLastClass;
return;
}
const CXCursor ref = clang_getCursorReferenced(cursor);
if (clang_isInvalid(clang_getCursorKind(ref))) // this happens when the base class is a template parameter
return;