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authorJulian Andres Klode <jak@debian.org>2012-06-16 14:35:15 +0200
committerJulian Andres Klode <jak@debian.org>2012-06-16 14:35:15 +0200
commit7899a1339ced1e8fa10730e5619349b9fd782fac (patch)
tree98291201a90673b1309ef3d129b67d41730b4dba /apt-pkg
parente08c5854bb9b5f352b0856533f95c12e858728ca (diff)
* apt-pkg/contrib/mmap.cc:
- Fix the Fallback option to work correctly, by not calling realloc() on a map mapped by mmap(), and by using malloc and friends instead of new[].
Diffstat (limited to 'apt-pkg')
-rw-r--r--apt-pkg/contrib/mmap.cc17
1 files changed, 8 insertions, 9 deletions
diff --git a/apt-pkg/contrib/mmap.cc b/apt-pkg/contrib/mmap.cc
index 2d12b6fe9..131cefd6e 100644
--- a/apt-pkg/contrib/mmap.cc
+++ b/apt-pkg/contrib/mmap.cc
@@ -83,7 +83,7 @@ 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 = new unsigned char[iSize];
+ Base = malloc(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());
@@ -91,17 +91,17 @@ bool MMap::Map(FileFd &Fd)
}
// Map it.
- Base = mmap(0,iSize,Prot,Map,Fd.Fd(),0);
+ Base = (Flags & Fallback) ? MAP_FAILED : mmap(0,iSize,Prot,Map,Fd.Fd(),0);
if (Base == (void *)-1)
{
- if (errno == ENODEV || errno == EINVAL)
+ if (errno == ENODEV || errno == EINVAL || (Flags & Fallback))
{
// The filesystem doesn't support this particular kind of mmap.
// So we allocate a buffer and read the whole file into it.
if ((Flags & ReadOnly) == ReadOnly)
{
// for readonly, we don't need sync, so make it simple
- Base = new unsigned char[iSize];
+ Base = malloc(iSize);
return Fd.Read(Base, iSize);
}
// FIXME: Writing to compressed fd's ?
@@ -109,7 +109,7 @@ bool MMap::Map(FileFd &Fd)
if (dupped_fd == -1)
return _error->Errno("mmap", _("Couldn't duplicate file descriptor %i"), Fd.Fd());
- Base = new unsigned char[iSize];
+ Base = calloc(iSize, 1);
SyncToFd = new FileFd (dupped_fd);
if (!SyncToFd->Seek(0L) || !SyncToFd->Read(Base, iSize))
return false;
@@ -135,7 +135,7 @@ bool MMap::Close(bool DoSync)
if (SyncToFd != NULL)
{
- delete[] (char *)Base;
+ free(Base);
delete SyncToFd;
SyncToFd = NULL;
}
@@ -283,8 +283,7 @@ DynamicMMap::DynamicMMap(unsigned long Flags,unsigned long const &WorkSpace,
}
#endif
// fallback to a static allocated space
- Base = new unsigned char[WorkSpace];
- memset(Base,0,WorkSpace);
+ Base = calloc(WorkSpace, 1);
iSize = 0;
}
/*}}}*/
@@ -300,7 +299,7 @@ DynamicMMap::~DynamicMMap()
#ifdef _POSIX_MAPPED_FILES
munmap(Base, WorkSpace);
#else
- delete [] (unsigned char *)Base;
+ free(Base);
#endif
return;
}