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-rw-r--r--apt-pkg/pkgcachegen.cc65
1 files changed, 56 insertions, 9 deletions
diff --git a/apt-pkg/pkgcachegen.cc b/apt-pkg/pkgcachegen.cc
index 68180c702..f988c1018 100644
--- a/apt-pkg/pkgcachegen.cc
+++ b/apt-pkg/pkgcachegen.cc
@@ -664,16 +664,23 @@ unsigned long pkgCacheGenerator::WriteUniqString(const char *S,
static bool CheckValidity(const string &CacheFile, FileIterator Start,
FileIterator End,MMap **OutMap = 0)
{
+ bool const Debug = _config->FindB("Debug::pkgCacheGen", false);
// No file, certainly invalid
if (CacheFile.empty() == true || FileExists(CacheFile) == false)
+ {
+ if (Debug == true)
+ std::clog << "CacheFile doesn't exist" << std::endl;
return false;
-
+ }
+
// Map it
FileFd CacheF(CacheFile,FileFd::ReadOnly);
SPtr<MMap> Map = new MMap(CacheF,0);
pkgCache Cache(Map);
if (_error->PendingError() == true || Map->Size() == 0)
{
+ if (Debug == true)
+ std::clog << "Errors are pending or Map is empty()" << std::endl;
_error->Discard();
return false;
}
@@ -683,9 +690,15 @@ static bool CheckValidity(const string &CacheFile, FileIterator Start,
SPtrArray<bool> Visited = new bool[Cache.HeaderP->PackageFileCount];
memset(Visited,0,sizeof(*Visited)*Cache.HeaderP->PackageFileCount);
for (; Start != End; Start++)
- {
+ {
+ if (Debug == true)
+ std::clog << "Checking PkgFile " << (*Start)->Describe() << ": ";
if ((*Start)->HasPackages() == false)
+ {
+ if (Debug == true)
+ std::clog << "Has NO packages" << std::endl;
continue;
+ }
if ((*Start)->Exists() == false)
{
@@ -693,23 +706,40 @@ static bool CheckValidity(const string &CacheFile, FileIterator Start,
_error->WarningE("stat",_("Couldn't stat source package list %s"),
(*Start)->Describe().c_str());
#endif
+ if (Debug == true)
+ std::clog << "file doesn't exist" << std::endl;
continue;
}
// FindInCache is also expected to do an IMS check.
pkgCache::PkgFileIterator File = (*Start)->FindInCache(Cache);
if (File.end() == true)
+ {
+ if (Debug == true)
+ std::clog << "FindInCache returned end-Pointer" << std::endl;
return false;
+ }
Visited[File->ID] = true;
+ if (Debug == true)
+ std::clog << "with ID " << File->ID << " is valid" << std::endl;
}
for (unsigned I = 0; I != Cache.HeaderP->PackageFileCount; I++)
if (Visited[I] == false)
+ {
+ if (Debug == true)
+ std::clog << "File with ID" << I << " wasn't visited" << std::endl;
return false;
+ }
if (_error->PendingError() == true)
{
+ if (Debug == true)
+ {
+ std::clog << "Validity failed because of pending errors:" << std::endl;
+ _error->DumpErrors();
+ }
_error->Discard();
return false;
}
@@ -796,7 +826,8 @@ static bool BuildCache(pkgCacheGenerator &Gen,
bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
MMap **OutMap,bool AllowMem)
{
- unsigned long MapSize = _config->FindI("APT::Cache-Limit",24*1024*1024);
+ bool const Debug = _config->FindB("Debug::pkgCacheGen", false);
+ unsigned long const MapSize = _config->FindI("APT::Cache-Limit",24*1024*1024);
vector<pkgIndexFile *> Files;
for (vector<metaIndex *>::const_iterator i = List.begin();
@@ -810,13 +841,13 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
Files.push_back (*j);
}
- unsigned long EndOfSource = Files.size();
+ unsigned long const EndOfSource = Files.size();
if (_system->AddStatusFiles(Files) == false)
return false;
// Decide if we can write to the files..
- string CacheFile = _config->FindFile("Dir::Cache::pkgcache");
- string SrcCacheFile = _config->FindFile("Dir::Cache::srcpkgcache");
+ string const CacheFile = _config->FindFile("Dir::Cache::pkgcache");
+ string const SrcCacheFile = _config->FindFile("Dir::Cache::srcpkgcache");
// Decide if we can write to the cache
bool Writeable = false;
@@ -825,7 +856,9 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
else
if (SrcCacheFile.empty() == false)
Writeable = access(flNotFile(SrcCacheFile).c_str(),W_OK) == 0;
-
+ if (Debug == true)
+ std::clog << "Do we have write-access to the cache files? " << (Writeable ? "YES" : "NO") << std::endl;
+
if (Writeable == false && AllowMem == false && CacheFile.empty() == false)
return _error->Error(_("Unable to write to %s"),flNotFile(CacheFile).c_str());
@@ -835,8 +868,12 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
if (CheckValidity(CacheFile,Files.begin(),Files.end(),OutMap) == true)
{
Progress.OverallProgress(1,1,1,_("Reading package lists"));
+ if (Debug == true)
+ std::clog << "pkgcache.bin is valid - no need to build anything" << std::endl;
return true;
}
+ else if (Debug == true)
+ std::clog << "pkgcache.bin is NOT valid" << std::endl;
/* At this point we know we need to reconstruct the package cache,
begin. */
@@ -850,11 +887,15 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
Map = new DynamicMMap(*CacheF,MMap::Public,MapSize);
if (_error->PendingError() == true)
return false;
+ if (Debug == true)
+ std::clog << "Open filebased MMap" << std::endl;
}
else
{
// Just build it in memory..
Map = new DynamicMMap(0,MapSize);
+ if (Debug == true)
+ std::clog << "Open memory Map (not filebased)" << std::endl;
}
// Lets try the source cache.
@@ -863,16 +904,18 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
if (CheckValidity(SrcCacheFile,Files.begin(),
Files.begin()+EndOfSource) == true)
{
+ if (Debug == true)
+ std::clog << "srcpkgcache.bin is valid - populate MMap with it." << std::endl;
// Preload the map with the source cache
FileFd SCacheF(SrcCacheFile,FileFd::ReadOnly);
- unsigned long alloc = Map->RawAllocate(SCacheF.Size());
+ unsigned long const alloc = Map->RawAllocate(SCacheF.Size());
if ((alloc == 0 && _error->PendingError())
|| SCacheF.Read((unsigned char *)Map->Data() + alloc,
SCacheF.Size()) == false)
return false;
TotalSize = ComputeSize(Files.begin()+EndOfSource,Files.end());
-
+
// Build the status cache
pkgCacheGenerator Gen(Map.Get(),&Progress);
if (_error->PendingError() == true)
@@ -883,6 +926,8 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
}
else
{
+ if (Debug == true)
+ std::clog << "srcpkgcache.bin is NOT valid - rebuild" << std::endl;
TotalSize = ComputeSize(Files.begin(),Files.end());
// Build the source cache
@@ -921,6 +966,8 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
Files.begin()+EndOfSource,Files.end()) == false)
return false;
}
+ if (Debug == true)
+ std::clog << "Caches are ready for shipping" << std::endl;
if (_error->PendingError() == true)
return false;
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-18 02:26:53 +0000