don't try to get acquire lock in simulation mode

[apt.git] / apt-pkg / pkgcache.cc

diff --git a/apt-pkg/pkgcache.cc b/apt-pkg/pkgcache.cc
index 73907491065c83a3b417a1b0fc49e0ff14d290b4..76336ae77f1f2deaa0af245ca6685c78ef4ba6e4 100644 (file)
--- a/apt-pkg/pkgcache.cc
+++ b/apt-pkg/pkgcache.cc
@@ -39,11 +39,13 @@
 #include <vector>
 #include <string>
 #include <sys/stat.h>
 #include <vector>
 #include <string>
 #include <sys/stat.h>

+#include <zlib.h>

 
 #include <apti18n.h>
                                                                        /*}}}*/
 
 using std::string;
 
 #include <apti18n.h>
                                                                        /*}}}*/
 
 using std::string;

+using APT::StringView;

 
 
 // Cache::Header::Header - Constructor                                 /*{{{*/
 
 
 // Cache::Header::Header - Constructor                                 /*{{{*/


@@ -57,7 +59,7 @@ pkgCache::Header::Header()
    /* Whenever the structures change the major version should be bumped,
       whenever the generator changes the minor version should be bumped. */
    APT_HEADER_SET(MajorVersion, 10);
    /* Whenever the structures change the major version should be bumped,
       whenever the generator changes the minor version should be bumped. */
    APT_HEADER_SET(MajorVersion, 10);

-   APT_HEADER_SET(MinorVersion, 0);
+   APT_HEADER_SET(MinorVersion, 5);

    APT_HEADER_SET(Dirty, false);
 
    APT_HEADER_SET(HeaderSz, sizeof(pkgCache::Header));
    APT_HEADER_SET(Dirty, false);
 
    APT_HEADER_SET(HeaderSz, sizeof(pkgCache::Header));


@@ -93,7 +95,7 @@ pkgCache::Header::Header()
    VerSysName = 0;
    Architecture = 0;
    SetArchitectures(0);
    VerSysName = 0;
    Architecture = 0;
    SetArchitectures(0);

-   SetHashTableSize(_config->FindI("APT::Cache-HashTableSize", 10 * 1048));
+   SetHashTableSize(_config->FindI("APT::Cache-HashTableSize", 50503));

    memset(Pools,0,sizeof(Pools));
 
    CacheFileSize = 0;
    memset(Pools,0,sizeof(Pools));
 
    CacheFileSize = 0;


@@ -125,7 +127,7 @@ bool pkgCache::Header::CheckSizes(Header &Against) const
 // ---------------------------------------------------------------------
 /* */
 APT_IGNORE_DEPRECATED_PUSH
 // ---------------------------------------------------------------------
 /* */
 APT_IGNORE_DEPRECATED_PUSH

-pkgCache::pkgCache(MMap *Map, bool DoMap) : Map(*Map), d(NULL)
+pkgCache::pkgCache(MMap *Map, bool DoMap) : Map(*Map), VS(nullptr), d(NULL)

 {
    // call getArchitectures() with cached=false to ensure that the 
    // architectures cache is re-evaulated. this is needed in cases
 {
    // call getArchitectures() with cached=false to ensure that the 
    // architectures cache is re-evaulated. this is needed in cases


@@ -173,9 +175,6 @@ bool pkgCache::ReMap(bool const &Errorchecks)
        HeaderP->CheckSizes(DefHeader) == false)
       return _error->Error(_("The package cache file is an incompatible version"));
 
        HeaderP->CheckSizes(DefHeader) == false)
       return _error->Error(_("The package cache file is an incompatible version"));
 

-   if (Map.Size() < HeaderP->CacheFileSize)
-      return _error->Error(_("The package cache file is corrupted, it is too small"));
-

    if (HeaderP->VerSysName == 0 || HeaderP->Architecture == 0 || HeaderP->GetArchitectures() == 0)
       return _error->Error(_("The package cache file is corrupted"));
 
    if (HeaderP->VerSysName == 0 || HeaderP->Architecture == 0 || HeaderP->GetArchitectures() == 0)
       return _error->Error(_("The package cache file is corrupted"));
 


@@ -185,14 +184,23 @@ bool pkgCache::ReMap(bool const &Errorchecks)
 
    // Check the architecture
    std::vector<std::string> archs = APT::Configuration::getArchitectures();
 
    // Check the architecture
    std::vector<std::string> archs = APT::Configuration::getArchitectures();

-   std::vector<std::string>::const_iterator a = archs.begin();
-   std::string list = *a;
-   for (++a; a != archs.end(); ++a)
-      list.append(",").append(*a);
+   std::string list = "";
+   for (auto const & arch : archs) {
+      if (!list.empty())
+         list.append(",");
+      list.append(arch);
+   }

    if (_config->Find("APT::Architecture") != StrP + HeaderP->Architecture ||
         list != StrP + HeaderP->GetArchitectures())
       return _error->Error(_("The package cache was built for different architectures: %s vs %s"), StrP + HeaderP->GetArchitectures(), list.c_str());
 
    if (_config->Find("APT::Architecture") != StrP + HeaderP->Architecture ||
         list != StrP + HeaderP->GetArchitectures())
       return _error->Error(_("The package cache was built for different architectures: %s vs %s"), StrP + HeaderP->GetArchitectures(), list.c_str());
 

+
+   auto hash = CacheHash();
+   if (_config->FindB("Debug::pkgCacheGen", false))
+      std::clog << "Opened cache with hash " << hash << ", expecting " <<  HeaderP->CacheFileSize << "\n";
+   if (hash != HeaderP->CacheFileSize)
+      return _error->Error(_("The package cache file is corrupted, it has the wrong hash"));
+

    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/


@@ -201,53 +209,69 @@ bool pkgCache::ReMap(bool const &Errorchecks)
 /* This is used to generate the hash entries for the HashTable. With my
    package list from bo this function gets 94% table usage on a 512 item
    table (480 used items) */
 /* This is used to generate the hash entries for the HashTable. With my
    package list from bo this function gets 94% table usage on a 512 item
    table (480 used items) */

+map_id_t pkgCache::sHash(StringView Str) const
+{
+   uint32_t Hash = 5381;
+   for (auto I = Str.begin(); I != Str.end(); ++I)
+      Hash = 33 * Hash + tolower_ascii(*I);
+   return Hash % HeaderP->GetHashTableSize();
+}

 map_id_t pkgCache::sHash(const string &Str) const
 {
 map_id_t pkgCache::sHash(const string &Str) const
 {

-   unsigned long Hash = 0;
+   uint32_t Hash = 5381;

    for (string::const_iterator I = Str.begin(); I != Str.end(); ++I)
    for (string::const_iterator I = Str.begin(); I != Str.end(); ++I)

-      Hash = 41 * Hash + tolower_ascii(*I);
+      Hash = 33 * Hash + tolower_ascii((signed char)*I);

    return Hash % HeaderP->GetHashTableSize();
 }
 
 map_id_t pkgCache::sHash(const char *Str) const
 {
    return Hash % HeaderP->GetHashTableSize();
 }
 
 map_id_t pkgCache::sHash(const char *Str) const
 {

-   unsigned long Hash = tolower_ascii(*Str);
-   for (const char *I = Str + 1; *I != 0; ++I)
-      Hash = 41 * Hash + tolower_ascii(*I);
+   uint32_t Hash = 5381;
+   for (const char *I = Str; *I != 0; ++I)
+      Hash = 33 * Hash + tolower_ascii((signed char)*I);

    return Hash % HeaderP->GetHashTableSize();
 }
    return Hash % HeaderP->GetHashTableSize();
 }

-                                                                       /*}}}*/
-// Cache::SingleArchFindPkg - Locate a package by name                 /*{{{*/
-// ---------------------------------------------------------------------
-/* Returns 0 on error, pointer to the package otherwise
-   The multiArch enabled methods will fallback to this one as it is (a bit)
-   faster for single arch environments and realworld is mostly singlearch… */
-pkgCache::PkgIterator pkgCache::SingleArchFindPkg(const string &Name)
+
+uint32_t pkgCache::CacheHash()

 {
 {

-   // Look at the hash bucket
-   Package *Pkg = PkgP + HeaderP->PkgHashTableP()[Hash(Name)];
-   for (; Pkg != PkgP; Pkg = PkgP + Pkg->NextPackage)
-   {
-      int const cmp = strcmp(Name.c_str(), StrP + (GrpP + Pkg->Group)->Name);
-      if (cmp == 0)
-        return PkgIterator(*this, Pkg);
-      else if (cmp < 0)
-        break;
+   pkgCache::Header header = {};
+   uLong adler = adler32(0L, Z_NULL, 0);
+
+   if (Map.Size() < sizeof(header))
+      return adler;
+   memcpy(&header, GetMap().Data(), sizeof(header));
+
+   header.Dirty = false;
+   header.CacheFileSize = 0;
+
+   adler = adler32(adler,
+                  reinterpret_cast<const unsigned char *>(&header),
+                  sizeof(header));
+
+   if (Map.Size() > sizeof(header)) {
+      adler = adler32(adler,
+                     static_cast<const unsigned char *>(GetMap().Data()) + sizeof(header),
+                     GetMap().Size() - sizeof(header));

    }
    }

-   return PkgIterator(*this,0);
+
+   return adler;

 }
                                                                        /*}}}*/
 // Cache::FindPkg - Locate a package by name                           /*{{{*/
 // ---------------------------------------------------------------------
 /* Returns 0 on error, pointer to the package otherwise */
 pkgCache::PkgIterator pkgCache::FindPkg(const string &Name) {
 }
                                                                        /*}}}*/
 // Cache::FindPkg - Locate a package by name                           /*{{{*/
 // ---------------------------------------------------------------------
 /* Returns 0 on error, pointer to the package otherwise */
 pkgCache::PkgIterator pkgCache::FindPkg(const string &Name) {

-       size_t const found = Name.find(':');
+   return FindPkg(StringView(Name));
+}
+
+pkgCache::PkgIterator pkgCache::FindPkg(StringView Name) {
+       auto const found = Name.rfind(':');

        if (found == string::npos)
           return FindPkg(Name, "native");
        if (found == string::npos)
           return FindPkg(Name, "native");

-       string const Arch = Name.substr(found+1);
-       /* Beware: This is specialcased to handle pkg:any in dependencies as
-          these are linked to virtual pkg:any named packages with all archs.
-          If you want any arch from a given pkg, use FindPkg(pkg,arch) */
+       auto const Arch = Name.substr(found+1);
+       /* Beware: This is specialcased to handle pkg:any in dependencies
+          as these are linked to virtual pkg:any named packages.
+          If you want any arch from a pkg, use FindPkg(pkg,"any") */

        if (Arch == "any")
                return FindPkg(Name, "any");
        return FindPkg(Name.substr(0, found), Arch);
        if (Arch == "any")
                return FindPkg(Name, "any");
        return FindPkg(Name.substr(0, found), Arch);


@@ -257,6 +281,10 @@ pkgCache::PkgIterator pkgCache::FindPkg(const string &Name) {
 // ---------------------------------------------------------------------
 /* Returns 0 on error, pointer to the package otherwise */
 pkgCache::PkgIterator pkgCache::FindPkg(const string &Name, string const &Arch) {
 // ---------------------------------------------------------------------
 /* Returns 0 on error, pointer to the package otherwise */
 pkgCache::PkgIterator pkgCache::FindPkg(const string &Name, string const &Arch) {

+   return FindPkg(StringView(Name), StringView(Arch));
+}
+
+pkgCache::PkgIterator pkgCache::FindPkg(StringView Name, StringView Arch) {

        /* We make a detour via the GrpIterator here as
           on a multi-arch environment a group is easier to
           find than a package (less entries in the buckets) */
        /* We make a detour via the GrpIterator here as
           on a multi-arch environment a group is easier to
           find than a package (less entries in the buckets) */


@@ -271,13 +299,17 @@ pkgCache::PkgIterator pkgCache::FindPkg(const string &Name, string const &Arch)
 // ---------------------------------------------------------------------
 /* Returns End-Pointer on error, pointer to the group otherwise */
 pkgCache::GrpIterator pkgCache::FindGrp(const string &Name) {
 // ---------------------------------------------------------------------
 /* Returns End-Pointer on error, pointer to the group otherwise */
 pkgCache::GrpIterator pkgCache::FindGrp(const string &Name) {

+   return FindGrp(StringView(Name));
+}
+
+pkgCache::GrpIterator pkgCache::FindGrp(StringView Name) {

        if (unlikely(Name.empty() == true))
                return GrpIterator(*this,0);
 
        // Look at the hash bucket for the group
        Group *Grp = GrpP + HeaderP->GrpHashTableP()[sHash(Name)];
        for (; Grp != GrpP; Grp = GrpP + Grp->Next) {
        if (unlikely(Name.empty() == true))
                return GrpIterator(*this,0);
 
        // Look at the hash bucket for the group
        Group *Grp = GrpP + HeaderP->GrpHashTableP()[sHash(Name)];
        for (; Grp != GrpP; Grp = GrpP + Grp->Next) {

-               int const cmp = strcmp(Name.c_str(), StrP + Grp->Name);
+               int const cmp = Name.compare(ViewString(Grp->Name));

                if (cmp == 0)
                        return GrpIterator(*this, Grp);
                else if (cmp < 0)
                if (cmp == 0)
                        return GrpIterator(*this, Grp);
                else if (cmp < 0)


@@ -329,7 +361,7 @@ const char *pkgCache::DepType(unsigned char Type)
 /* */
 const char *pkgCache::Priority(unsigned char Prio)
 {
 /* */
 const char *pkgCache::Priority(unsigned char Prio)
 {

-   const char *Mapping[] = {0,_("important"),_("required"),_("standard"),
+   const char *Mapping[] = {0,_("required"),_("important"),_("standard"),

                             _("optional"),_("extra")};
    if (Prio < _count(Mapping))
       return Mapping[Prio];
                             _("optional"),_("extra")};
    if (Prio < _count(Mapping))
       return Mapping[Prio];


@@ -340,29 +372,26 @@ const char *pkgCache::Priority(unsigned char Prio)
 // ---------------------------------------------------------------------
 /* Returns an End-Pointer on error, pointer to the package otherwise */
 pkgCache::PkgIterator pkgCache::GrpIterator::FindPkg(string Arch) const {
 // ---------------------------------------------------------------------
 /* Returns an End-Pointer on error, pointer to the package otherwise */
 pkgCache::PkgIterator pkgCache::GrpIterator::FindPkg(string Arch) const {

+   return FindPkg(StringView(Arch));
+}
+pkgCache::PkgIterator pkgCache::GrpIterator::FindPkg(const char *Arch) const {
+   return FindPkg(StringView(Arch));
+}
+pkgCache::PkgIterator pkgCache::GrpIterator::FindPkg(StringView Arch) const {

        if (unlikely(IsGood() == false || S->FirstPackage == 0))
                return PkgIterator(*Owner, 0);
 
        /* If we accept any package we simply return the "first"
        if (unlikely(IsGood() == false || S->FirstPackage == 0))
                return PkgIterator(*Owner, 0);
 
        /* If we accept any package we simply return the "first"

-          package in this group (the last one added). */
+          package in this group */

        if (Arch == "any")
                return PkgIterator(*Owner, Owner->PkgP + S->FirstPackage);
        if (Arch == "any")
                return PkgIterator(*Owner, Owner->PkgP + S->FirstPackage);

-
-       char const* const myArch = Owner->NativeArch();
-       /* Most of the time the package for our native architecture is
-          the one we add at first to the cache, but this would be the
-          last one we check, so we do it now. */
-       if (Arch == "native" || Arch == myArch || Arch == "all") {
-               pkgCache::Package *Pkg = Owner->PkgP + S->LastPackage;
-               if (strcmp(myArch, Owner->StrP + Pkg->Arch) == 0)
-                       return PkgIterator(*Owner, Pkg);
-               Arch = myArch;
-       }
+       if (Arch == "native" || Arch == "all")
+               Arch = Owner->NativeArch();

 
        // Iterate over the list to find the matching arch
        for (pkgCache::Package *Pkg = PackageList(); Pkg != Owner->PkgP;
             Pkg = Owner->PkgP + Pkg->NextPackage) {
 
        // Iterate over the list to find the matching arch
        for (pkgCache::Package *Pkg = PackageList(); Pkg != Owner->PkgP;
             Pkg = Owner->PkgP + Pkg->NextPackage) {

-               if (stringcmp(Arch, Owner->StrP + Pkg->Arch) == 0)
+               if (Arch == Owner->ViewString(Pkg->Arch))

                        return PkgIterator(*Owner, Pkg);
                if ((Owner->PkgP + S->LastPackage) == Pkg)
                        break;
                        return PkgIterator(*Owner, Pkg);
                if ((Owner->PkgP + S->LastPackage) == Pkg)
                        break;


@@ -375,7 +404,7 @@ pkgCache::PkgIterator pkgCache::GrpIterator::FindPkg(string Arch) const {
 // ---------------------------------------------------------------------
 /* Returns an End-Pointer on error, pointer to the package otherwise */
 pkgCache::PkgIterator pkgCache::GrpIterator::FindPreferredPkg(bool const &PreferNonVirtual) const {
 // ---------------------------------------------------------------------
 /* Returns an End-Pointer on error, pointer to the package otherwise */
 pkgCache::PkgIterator pkgCache::GrpIterator::FindPreferredPkg(bool const &PreferNonVirtual) const {

-       pkgCache::PkgIterator Pkg = FindPkg("native");
+       pkgCache::PkgIterator Pkg = FindPkg(StringView("native", 6));

        if (Pkg.end() == false && (PreferNonVirtual == false || Pkg->VersionList != 0))
                return Pkg;
 
        if (Pkg.end() == false && (PreferNonVirtual == false || Pkg->VersionList != 0))
                return Pkg;
 


@@ -387,7 +416,7 @@ pkgCache::PkgIterator pkgCache::GrpIterator::FindPreferredPkg(bool const &Prefer
                        return Pkg;
        }
        // packages without an architecture
                        return Pkg;
        }
        // packages without an architecture

-       Pkg = FindPkg("none");
+       Pkg = FindPkg(StringView("none", 4));

        if (Pkg.end() == false && (PreferNonVirtual == false || Pkg->VersionList != 0))
                return Pkg;
 
        if (Pkg.end() == false && (PreferNonVirtual == false || Pkg->VersionList != 0))
                return Pkg;
 


@@ -471,7 +500,7 @@ pkgCache::PkgIterator::OkState pkgCache::PkgIterator::State() const
    
    if (S->CurrentState == pkgCache::State::UnPacked ||
        S->CurrentState == pkgCache::State::HalfConfigured)
    
    if (S->CurrentState == pkgCache::State::UnPacked ||
        S->CurrentState == pkgCache::State::HalfConfigured)

-      // we leave triggers alone complettely. dpkg deals with
+      // we leave triggers alone completely. dpkg deals with

       // them in a hard-to-predict manner and if they get 
       // resolved by dpkg before apt run dpkg --configure on 
       // the TriggersPending package dpkg returns a error
       // them in a hard-to-predict manner and if they get 
       // resolved by dpkg before apt run dpkg --configure on 
       // the TriggersPending package dpkg returns a error


@@ -524,7 +553,9 @@ operator<<(std::ostream& out, pkgCache::PkgIterator Pkg)
       return out << "invalid package";
 
    string current = string(Pkg.CurVersion() == 0 ? "none" : Pkg.CurVersion());
       return out << "invalid package";
 
    string current = string(Pkg.CurVersion() == 0 ? "none" : Pkg.CurVersion());

+APT_IGNORE_DEPRECATED_PUSH

    string candidate = string(Pkg.CandVersion() == 0 ? "none" : Pkg.CandVersion());
    string candidate = string(Pkg.CandVersion() == 0 ? "none" : Pkg.CandVersion());

+APT_IGNORE_DEPRECATED_POP

    string newest = string(Pkg.VersionList().end() ? "none" : Pkg.VersionList().VerStr());
 
    out << Pkg.Name() << " [ " << Pkg.Arch() << " ] < " << current;
    string newest = string(Pkg.VersionList().end() ? "none" : Pkg.VersionList().VerStr());
 
    out << Pkg.Name() << " [ " << Pkg.Arch() << " ] < " << current;


@@ -773,7 +804,7 @@ bool pkgCache::DepIterator::IsImplicit() const
    return false;
 }
                                                                        /*}}}*/
    return false;
 }
                                                                        /*}}}*/

-// ostream operator to handle string representation of a dependecy     /*{{{*/
+// ostream operator to handle string representation of a dependency    /*{{{*/

 // ---------------------------------------------------------------------
 /* */
 std::ostream& operator<<(std::ostream& out, pkgCache::DepIterator D)
 // ---------------------------------------------------------------------
 /* */
 std::ostream& operator<<(std::ostream& out, pkgCache::DepIterator D)


@@ -786,10 +817,12 @@ std::ostream& operator<<(std::ostream& out, pkgCache::DepIterator D)
 
    out << (P.end() ? "invalid pkg" : P.FullName(false)) << " " << D.DepType()
        << " on ";
 
    out << (P.end() ? "invalid pkg" : P.FullName(false)) << " " << D.DepType()
        << " on ";

+APT_IGNORE_DEPRECATED_PUSH

    if (T.end() == true)
       out << "invalid pkg";
    else
       out << T;
    if (T.end() == true)
       out << "invalid pkg";
    else
       out << T;

+APT_IGNORE_DEPRECATED_POP

 
    if (D->Version != 0)
       out << " (" << D.CompType() << " " << D.TargetVer() << ")";
 
    if (D->Version != 0)
       out << " (" << D.CompType() << " " << D.TargetVer() << ")";