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[apt.git] / apt-pkg / pkgcachegen.cc
diff --git a/apt-pkg/pkgcachegen.cc b/apt-pkg/pkgcachegen.cc
index a48fe79469a29c14fc95f40042af20d9714c7887..f0b5a982eb2d4c50248c886584efb701e568b1ae 100644 (file)
--- a/apt-pkg/pkgcachegen.cc
+++ b/apt-pkg/pkgcachegen.cc
@@ -57,6 +57,9 @@ using APT::StringView;
 pkgCacheGenerator::pkgCacheGenerator(DynamicMMap *pMap,OpProgress *Prog) :
                    Map(*pMap), Cache(pMap,false), Progress(Prog),
                     CurrentRlsFile(NULL), CurrentFile(NULL), d(NULL)
+{
+}
+bool pkgCacheGenerator::Start()
 {
    if (Map.Size() == 0)
    {
@@ -67,7 +70,9 @@ pkgCacheGenerator::pkgCacheGenerator(DynamicMMap *pMap,OpProgress *Prog) :
       bool const newError = _error->PendingError();
       _error->MergeWithStack();
       if (newError)
-        return;
+        return false;
+      if (Map.Size() <= 0)
+        return false;
 
       Map.UsePools(*Cache.HeaderP->Pools,sizeof(Cache.HeaderP->Pools)/sizeof(Cache.HeaderP->Pools[0]));
 
@@ -76,16 +81,15 @@ pkgCacheGenerator::pkgCacheGenerator(DynamicMMap *pMap,OpProgress *Prog) :
 
       // make room for the hashtables for packages and groups
       if (Map.RawAllocate(2 * (Cache.HeaderP->GetHashTableSize() * sizeof(map_pointer_t))) == 0)
-        return;
+        return false;
 
       map_stringitem_t const idxVerSysName = WriteStringInMap(_system->VS->Label);
       if (unlikely(idxVerSysName == 0))
-        return;
-      Cache.HeaderP->VerSysName = idxVerSysName;
+        return false;
       map_stringitem_t const idxArchitecture = StoreString(MIXED, _config->Find("APT::Architecture"));
       if (unlikely(idxArchitecture == 0))
-        return;
-      Cache.HeaderP->Architecture = idxArchitecture;
+        return false;
+      map_stringitem_t idxArchitectures;
 
       std::vector<std::string> archs = APT::Configuration::getArchitectures();
       if (archs.size() > 1)
@@ -94,13 +98,17 @@ pkgCacheGenerator::pkgCacheGenerator(DynamicMMap *pMap,OpProgress *Prog) :
         std::string list = *a;
         for (++a; a != archs.end(); ++a)
            list.append(",").append(*a);
-        map_stringitem_t const idxArchitectures = WriteStringInMap(list);
+        idxArchitectures = WriteStringInMap(list);
         if (unlikely(idxArchitectures == 0))
-           return;
-        Cache.HeaderP->SetArchitectures(idxArchitectures);
+           return false;
       }
       else
-        Cache.HeaderP->SetArchitectures(idxArchitecture);
+        idxArchitectures = idxArchitecture;
+
+      Cache.HeaderP = (pkgCache::Header *)Map.Data();
+      Cache.HeaderP->VerSysName = idxVerSysName;
+      Cache.HeaderP->Architecture = idxArchitecture;
+      Cache.HeaderP->SetArchitectures(idxArchitectures);
 
       // Calculate the hash for the empty map, so ReMap does not fail
       Cache.HeaderP->CacheFileSize = Cache.CacheHash();
@@ -112,14 +120,12 @@ pkgCacheGenerator::pkgCacheGenerator(DynamicMMap *pMap,OpProgress *Prog) :
       Cache.ReMap(); 
       Map.UsePools(*Cache.HeaderP->Pools,sizeof(Cache.HeaderP->Pools)/sizeof(Cache.HeaderP->Pools[0]));
       if (Cache.VS != _system->VS)
-      {
-        _error->Error(_("Cache has an incompatible versioning system"));
-        return;
-      }
+        return _error->Error(_("Cache has an incompatible versioning system"));
    }
 
    Cache.HeaderP->Dirty = true;
    Map.Sync(0,sizeof(pkgCache::Header));
+   return true;
 }
                                                                        /*}}}*/
 // CacheGenerator::~pkgCacheGenerator - Destructor                     /*{{{*/
@@ -142,6 +148,10 @@ pkgCacheGenerator::~pkgCacheGenerator()
 }
                                                                        /*}}}*/
 void pkgCacheGenerator::ReMap(void const * const oldMap, void const * const newMap, size_t oldSize) {/*{{{*/
+   // Prevent multiple remaps of the same iterator. If seen.insert(iterator)
+   // returns (something, true) the iterator was not yet seen and we can
+   // remap it.
+   std::unordered_set<void *> seen;
    if (oldMap == newMap)
       return;
 
@@ -155,29 +165,39 @@ void pkgCacheGenerator::ReMap(void const * const oldMap, void const * const newM
 
    for (std::vector<pkgCache::GrpIterator*>::const_iterator i = Dynamic<pkgCache::GrpIterator>::toReMap.begin();
        i != Dynamic<pkgCache::GrpIterator>::toReMap.end(); ++i)
-      (*i)->ReMap(oldMap, newMap);
+      if (std::get<1>(seen.insert(*i)) == true)
+        (*i)->ReMap(oldMap, newMap);
    for (std::vector<pkgCache::PkgIterator*>::const_iterator i = Dynamic<pkgCache::PkgIterator>::toReMap.begin();
        i != Dynamic<pkgCache::PkgIterator>::toReMap.end(); ++i)
-      (*i)->ReMap(oldMap, newMap);
+      if (std::get<1>(seen.insert(*i)) == true)
+        (*i)->ReMap(oldMap, newMap);
    for (std::vector<pkgCache::VerIterator*>::const_iterator i = Dynamic<pkgCache::VerIterator>::toReMap.begin();
        i != Dynamic<pkgCache::VerIterator>::toReMap.end(); ++i)
-      (*i)->ReMap(oldMap, newMap);
+      if (std::get<1>(seen.insert(*i)) == true)
+        (*i)->ReMap(oldMap, newMap);
    for (std::vector<pkgCache::DepIterator*>::const_iterator i = Dynamic<pkgCache::DepIterator>::toReMap.begin();
        i != Dynamic<pkgCache::DepIterator>::toReMap.end(); ++i)
-      (*i)->ReMap(oldMap, newMap);
+       if (std::get<1>(seen.insert(*i)) == true)
+        (*i)->ReMap(oldMap, newMap);
    for (std::vector<pkgCache::DescIterator*>::const_iterator i = Dynamic<pkgCache::DescIterator>::toReMap.begin();
        i != Dynamic<pkgCache::DescIterator>::toReMap.end(); ++i)
-      (*i)->ReMap(oldMap, newMap);
+      if (std::get<1>(seen.insert(*i)) == true)
+        (*i)->ReMap(oldMap, newMap);
    for (std::vector<pkgCache::PrvIterator*>::const_iterator i = Dynamic<pkgCache::PrvIterator>::toReMap.begin();
        i != Dynamic<pkgCache::PrvIterator>::toReMap.end(); ++i)
-      (*i)->ReMap(oldMap, newMap);
+      if (std::get<1>(seen.insert(*i)) == true)
+        (*i)->ReMap(oldMap, newMap);
    for (std::vector<pkgCache::PkgFileIterator*>::const_iterator i = Dynamic<pkgCache::PkgFileIterator>::toReMap.begin();
        i != Dynamic<pkgCache::PkgFileIterator>::toReMap.end(); ++i)
-      (*i)->ReMap(oldMap, newMap);
+      if (std::get<1>(seen.insert(*i)) == true)
+        (*i)->ReMap(oldMap, newMap);
    for (std::vector<pkgCache::RlsFileIterator*>::const_iterator i = Dynamic<pkgCache::RlsFileIterator>::toReMap.begin();
        i != Dynamic<pkgCache::RlsFileIterator>::toReMap.end(); ++i)
-      (*i)->ReMap(oldMap, newMap);
+      if (std::get<1>(seen.insert(*i)) == true)
+        (*i)->ReMap(oldMap, newMap);
    for (APT::StringView* ViewP : Dynamic<APT::StringView>::toReMap) {
+      if (std::get<1>(seen.insert(ViewP)) == false)
+        continue;
       // Ignore views outside of the cache.
       if (ViewP->data() < static_cast<const char*>(oldMap)
         || ViewP->data() > static_cast<const char*>(oldMap) + oldSize)
@@ -372,8 +392,21 @@ bool pkgCacheGenerator::MergeListVersion(ListParser &List, pkgCache::PkgIterator
         if (Res > 0)
            break;
         // Versionstrings are equal - is hash also equal?
-        if (Res == 0 && List.SameVersion(Hash, Ver) == true)
-           break;
+        if (Res == 0)
+        {
+           if (List.SameVersion(Hash, Ver) == true)
+              break;
+           // sort (volatile) sources above not-sources like the status file
+           if ((CurrentFile->Flags & pkgCache::Flag::NotSource) == 0)
+           {
+              auto VF = Ver.FileList();
+              for (; VF.end() == false; ++VF)
+                 if (VF.File().Flagged(pkgCache::Flag::NotSource) == false)
+                    break;
+              if (VF.end() == true)
+                 break;
+           }
+        }
         // proceed with the next till we have either the right
         // or we found another version (which will be lower)
       }
@@ -1607,7 +1640,7 @@ static bool loadBackMMapFromFile(std::unique_ptr<pkgCacheGenerator> &Gen,
    if (CacheF.Read((unsigned char *)Map->Data() + alloc, CacheF.Size()) == false)
       return false;
    Gen.reset(new pkgCacheGenerator(Map.get(),Progress));
-   return true;
+   return Gen->Start();
 }
 bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
                        MMap **OutMap, bool AllowMem)
@@ -1713,6 +1746,8 @@ bool pkgCacheGenerator::MakeStatusCache(pkgSourceList &List,OpProgress *Progress
       if (Debug == true)
         std::clog << "srcpkgcache.bin is NOT valid - rebuild" << std::endl;
       Gen.reset(new pkgCacheGenerator(Map.get(),Progress));
+      if (Gen->Start() == false)
+        return false;
 
       TotalSize += ComputeSize(&List, Files.begin(),Files.end());
       if (BuildCache(*Gen, Progress, CurrentSize, TotalSize, &List,
@@ -1790,7 +1825,7 @@ bool pkgCacheGenerator::MakeOnlyStatusCache(OpProgress *Progress,DynamicMMap **O
    if (Progress != NULL)
       Progress->OverallProgress(0,1,1,_("Reading package lists"));
    pkgCacheGenerator Gen(Map.get(),Progress);
-   if (_error->PendingError() == true)
+   if (Gen.Start() == false || _error->PendingError() == true)
       return false;
    if (BuildCache(Gen,Progress,CurrentSize,TotalSize, NULL,
                  Files.begin(), Files.end()) == false)
APT (for Cydia)