Fix several typos

[apt.git] / apt-pkg / contrib / mmap.cc

diff --git a/apt-pkg/contrib/mmap.cc b/apt-pkg/contrib/mmap.cc
index a176da6368fcb97562968775305c173b30c13c85..74870b404b3f3a9f1d23e72d99002bb84b16ba9b 100644 (file)
--- a/apt-pkg/contrib/mmap.cc
+++ b/apt-pkg/contrib/mmap.cc
@@ -16,17 +16,17 @@
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/

-#define _BSD_SOURCE
+#define _DEFAULT_SOURCE

 #include <config.h>
 
 #include <apt-pkg/mmap.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/fileutl.h>
 #include <config.h>
 
 #include <apt-pkg/mmap.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/fileutl.h>

+#include <apt-pkg/macros.h>

 
 

+#include <string>

 #include <sys/mman.h>
 #include <sys/mman.h>

-#include <sys/stat.h>

 #include <unistd.h>
 #include <unistd.h>

-#include <fcntl.h>

 #include <stdlib.h>
 #include <errno.h>
 #include <cstring>
 #include <stdlib.h>
 #include <errno.h>
 #include <cstring>


@@ -38,7 +38,7 @@
 // ---------------------------------------------------------------------
 /* */
 MMap::MMap(FileFd &F,unsigned long Flags) : Flags(Flags), iSize(0),
 // ---------------------------------------------------------------------
 /* */
 MMap::MMap(FileFd &F,unsigned long Flags) : Flags(Flags), iSize(0),

-                     Base(0), SyncToFd(NULL)
+                     Base(nullptr), SyncToFd(nullptr)

 {
    if ((Flags & NoImmMap) != NoImmMap)
       Map(F);
 {
    if ((Flags & NoImmMap) != NoImmMap)
       Map(F);


@@ -48,7 +48,7 @@ MMap::MMap(FileFd &F,unsigned long Flags) : Flags(Flags), iSize(0),
 // ---------------------------------------------------------------------
 /* */
 MMap::MMap(unsigned long Flags) : Flags(Flags), iSize(0),
 // ---------------------------------------------------------------------
 /* */
 MMap::MMap(unsigned long Flags) : Flags(Flags), iSize(0),

-                     Base(0), SyncToFd(NULL)
+                     Base(nullptr), SyncToFd(nullptr)

 {
 }
                                                                        /*}}}*/
 {
 }
                                                                        /*}}}*/


@@ -84,6 +84,8 @@ bool MMap::Map(FileFd &Fd)
       if ((Flags & ReadOnly) != ReadOnly)
         return _error->Error("Compressed file %s can only be mapped readonly", Fd.Name().c_str());
       Base = malloc(iSize);
       if ((Flags & ReadOnly) != ReadOnly)
         return _error->Error("Compressed file %s can only be mapped readonly", Fd.Name().c_str());
       Base = malloc(iSize);

+      if (unlikely(Base == nullptr))
+        return _error->Errno("MMap-compressed-malloc", _("Couldn't make mmap of %llu bytes"), iSize);

       SyncToFd = new FileFd();
       if (Fd.Seek(0L) == false || Fd.Read(Base, iSize) == false)
         return _error->Error("Compressed file %s can't be read into mmap", Fd.Name().c_str());
       SyncToFd = new FileFd();
       if (Fd.Seek(0L) == false || Fd.Read(Base, iSize) == false)
         return _error->Error("Compressed file %s can't be read into mmap", Fd.Name().c_str());


@@ -92,7 +94,7 @@ bool MMap::Map(FileFd &Fd)
 
    // Map it.
    Base = (Flags & Fallback) ? MAP_FAILED : mmap(0,iSize,Prot,Map,Fd.Fd(),0);
 
    // Map it.
    Base = (Flags & Fallback) ? MAP_FAILED : mmap(0,iSize,Prot,Map,Fd.Fd(),0);

-   if (Base == (void *)-1)
+   if (Base == MAP_FAILED)

    {
       if (errno == ENODEV || errno == EINVAL || (Flags & Fallback))
       {
    {
       if (errno == ENODEV || errno == EINVAL || (Flags & Fallback))
       {


@@ -102,6 +104,8 @@ bool MMap::Map(FileFd &Fd)
         {
            // for readonly, we don't need sync, so make it simple
            Base = malloc(iSize);
         {
            // for readonly, we don't need sync, so make it simple
            Base = malloc(iSize);

+           if (unlikely(Base == nullptr))
+              return _error->Errno("MMap-malloc", _("Couldn't make mmap of %llu bytes"), iSize);

            SyncToFd = new FileFd();
            return Fd.Read(Base, iSize);
         }
            SyncToFd = new FileFd();
            return Fd.Read(Base, iSize);
         }


@@ -111,13 +115,14 @@ bool MMap::Map(FileFd &Fd)
            return _error->Errno("mmap", _("Couldn't duplicate file descriptor %i"), Fd.Fd());
 
         Base = calloc(iSize, 1);
            return _error->Errno("mmap", _("Couldn't duplicate file descriptor %i"), Fd.Fd());
 
         Base = calloc(iSize, 1);

+        if (unlikely(Base == nullptr))
+           return _error->Errno("MMap-calloc", _("Couldn't make mmap of %llu bytes"), iSize);

         SyncToFd = new FileFd (dupped_fd);
         if (!SyncToFd->Seek(0L) || !SyncToFd->Read(Base, iSize))
            return false;
       }
       else
         SyncToFd = new FileFd (dupped_fd);
         if (!SyncToFd->Seek(0L) || !SyncToFd->Read(Base, iSize))
            return false;
       }
       else

-        return _error->Errno("mmap",_("Couldn't make mmap of %llu bytes"),
-                             iSize);
+        return _error->Errno("MMap-mmap", _("Couldn't make mmap of %llu bytes"), iSize);

      }
 
    return true;
      }
 
    return true;


@@ -198,7 +203,7 @@ bool MMap::Sync(unsigned long Start,unsigned long Stop)
       {
 #ifdef _POSIX_SYNCHRONIZED_IO
         unsigned long long const PSize = sysconf(_SC_PAGESIZE);
       {
 #ifdef _POSIX_SYNCHRONIZED_IO
         unsigned long long const PSize = sysconf(_SC_PAGESIZE);

-        if (msync((char *)Base+(unsigned long long)(Start/PSize)*PSize,Stop - Start,MS_SYNC) < 0)
+        if (msync((char *)Base+(Start/PSize)*PSize, Stop - Start, MS_SYNC) < 0)

            return _error->Errno("msync", _("Unable to synchronize mmap"));
 #endif
       }
            return _error->Errno("msync", _("Unable to synchronize mmap"));
 #endif
       }


@@ -215,9 +220,6 @@ DynamicMMap::DynamicMMap(FileFd &F,unsigned long Flags,unsigned long const &Work
                MMap(F,Flags | NoImmMap), Fd(&F), WorkSpace(Workspace),
                GrowFactor(Grow), Limit(Limit)
 {
                MMap(F,Flags | NoImmMap), Fd(&F), WorkSpace(Workspace),
                GrowFactor(Grow), Limit(Limit)
 {

-   if (_error->PendingError() == true)
-      return;
-

    // disable Moveable if we don't grow
    if (Grow == 0)
       this->Flags &= ~Moveable;
    // disable Moveable if we don't grow
    if (Grow == 0)
       this->Flags &= ~Moveable;


@@ -252,9 +254,6 @@ DynamicMMap::DynamicMMap(unsigned long Flags,unsigned long const &WorkSpace,
                MMap(Flags | NoImmMap | UnMapped), Fd(0), WorkSpace(WorkSpace),
                GrowFactor(Grow), Limit(Limit)
 {
                MMap(Flags | NoImmMap | UnMapped), Fd(0), WorkSpace(WorkSpace),
                GrowFactor(Grow), Limit(Limit)
 {

-       if (_error->PendingError() == true)
-               return;
-

        // disable Moveable if we don't grow
        if (Grow == 0)
                this->Flags &= ~Moveable;
        // disable Moveable if we don't grow
        if (Grow == 0)
                this->Flags &= ~Moveable;


@@ -352,6 +351,12 @@ unsigned long DynamicMMap::RawAllocate(unsigned long long Size,unsigned long Aln
    size in the file. */
 unsigned long DynamicMMap::Allocate(unsigned long ItemSize)
 {
    size in the file. */
 unsigned long DynamicMMap::Allocate(unsigned long ItemSize)
 {

+   if (unlikely(ItemSize == 0))
+   {
+      _error->Fatal("Can't allocate an item of size zero");
+      return 0;
+   }
+

    // Look for a matching pool entry
    Pool *I;
    Pool *Empty = 0;
    // Look for a matching pool entry
    Pool *I;
    Pool *Empty = 0;


@@ -384,12 +389,15 @@ unsigned long DynamicMMap::Allocate(unsigned long ItemSize)
       const unsigned long size = 20*1024;
       I->Count = size/ItemSize;
       Pool* oldPools = Pools;
       const unsigned long size = 20*1024;
       I->Count = size/ItemSize;
       Pool* oldPools = Pools;

+      _error->PushToStack();

       Result = RawAllocate(size,ItemSize);
       Result = RawAllocate(size,ItemSize);

+      bool const newError = _error->PendingError();
+      _error->MergeWithStack();

       if (Pools != oldPools)
         I += Pools - oldPools;
 
       // Does the allocation failed ?
       if (Pools != oldPools)
         I += Pools - oldPools;
 
       // Does the allocation failed ?

-      if (Result == 0 && _error->PendingError())
+      if (Result == 0 && newError)

         return 0;
       I->Start = Result;
    }
         return 0;
       I->Start = Result;
    }


@@ -403,18 +411,28 @@ unsigned long DynamicMMap::Allocate(unsigned long ItemSize)
                                                                        /*}}}*/
 // DynamicMMap::WriteString - Write a string to the file               /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // DynamicMMap::WriteString - Write a string to the file               /*{{{*/
 // ---------------------------------------------------------------------

-/* Strings are not aligned to anything */
+/* Strings are aligned to 16 bytes */

 unsigned long DynamicMMap::WriteString(const char *String,
                                       unsigned long Len)
 {
    if (Len == (unsigned long)-1)
       Len = strlen(String);
 
 unsigned long DynamicMMap::WriteString(const char *String,
                                       unsigned long Len)
 {
    if (Len == (unsigned long)-1)
       Len = strlen(String);
 

-   unsigned long const Result = RawAllocate(Len+1,0);
+   _error->PushToStack();
+   unsigned long Result = RawAllocate(Len+1+sizeof(uint16_t),sizeof(uint16_t));
+   bool const newError = _error->PendingError();
+   _error->MergeWithStack();

 
 

-   if (Result == 0 && _error->PendingError())
+   if (Base == NULL || (Result == 0 && newError))

       return 0;
 
       return 0;
 

+   if (Len >= std::numeric_limits<uint16_t>::max())
+      abort();
+
+   uint16_t LenToWrite = Len;
+   memcpy((char *)Base + Result, &LenToWrite, sizeof(LenToWrite));
+   Result += + sizeof(LenToWrite);
+

    memcpy((char *)Base + Result,String,Len);
    ((char *)Base)[Result + Len] = 0;
    return Result;
    memcpy((char *)Base + Result,String,Len);
    ((char *)Base)[Result + Len] = 0;
    return Result;