Remove MappedFile support for mapping files for write and exec
and shared. This complicates the design, is not used, and probably
doesn't even work.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49022 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Archive/Archive.cpp b/lib/Archive/Archive.cpp
index 125b22e..c5da114 100644
--- a/lib/Archive/Archive.cpp
+++ b/lib/Archive/Archive.cpp
@@ -148,7 +148,7 @@
Archive::mapToMemory(std::string* ErrMsg)
{
mapfile = new sys::MappedFile();
- if (mapfile->open(archPath, sys::MappedFile::READ_ACCESS, ErrMsg))
+ if (mapfile->open(archPath, ErrMsg))
return true;
if (!(base = (char*) mapfile->map(ErrMsg)))
return true;
diff --git a/lib/Archive/ArchiveWriter.cpp b/lib/Archive/ArchiveWriter.cpp
index c73e170..6a71026 100644
--- a/lib/Archive/ArchiveWriter.cpp
+++ b/lib/Archive/ArchiveWriter.cpp
@@ -212,7 +212,7 @@
sys::MappedFile* mFile = 0;
if (!data) {
mFile = new sys::MappedFile();
- if (mFile->open(member.getPath(), sys::MappedFile::READ_ACCESS, ErrMsg))
+ if (mFile->open(member.getPath(), ErrMsg))
return true;
if (!(data = (const char*) mFile->map(ErrMsg)))
return true;
@@ -411,7 +411,7 @@
// Map in the archive we just wrote.
sys::MappedFile arch;
- if (arch.open(TmpArchive, sys::MappedFile::READ_ACCESS, ErrMsg))
+ if (arch.open(TmpArchive, ErrMsg))
return true;
const char* base;
if (!(base = (const char*) arch.map(ErrMsg)))
diff --git a/lib/Support/FileUtilities.cpp b/lib/Support/FileUtilities.cpp
index cde08d1..8cca9d9 100644
--- a/lib/Support/FileUtilities.cpp
+++ b/lib/Support/FileUtilities.cpp
@@ -192,10 +192,10 @@
// Now its safe to mmap the files into memory becasue both files
// have a non-zero size.
sys::MappedFile F1;
- if (F1.open(FileA, sys::MappedFile::READ_ACCESS, Error))
+ if (F1.open(FileA, Error))
return 2;
sys::MappedFile F2;
- if (F2.open(FileB, sys::MappedFile::READ_ACCESS, Error))
+ if (F2.open(FileB, Error))
return 2;
if (!F1.map(Error))
return 2;
diff --git a/lib/Support/MemoryBuffer.cpp b/lib/Support/MemoryBuffer.cpp
index 4d26d38..8cea07f 100644
--- a/lib/Support/MemoryBuffer.cpp
+++ b/lib/Support/MemoryBuffer.cpp
@@ -159,7 +159,7 @@
std::string *ErrStr) {
// FIXME: This does an extra stat syscall to figure out the size, but we
// already know the size!
- bool Failure = File.open(Filename, sys::MappedFile::READ_ACCESS, ErrStr);
+ bool Failure = File.open(Filename, ErrStr);
if (Failure) return true;
if (!File.map(ErrStr))
diff --git a/lib/System/Unix/MappedFile.inc b/lib/System/Unix/MappedFile.inc
index dcfd189..92dc666 100644
--- a/lib/System/Unix/MappedFile.inc
+++ b/lib/System/Unix/MappedFile.inc
@@ -1,4 +1,4 @@
-//===- Unix/MappedFile.cpp - Unix MappedFile Implementation -----*- C++ -*-===//
+//===- Unix/MappedFile.inc - Unix MappedFile Implementation -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
@@ -11,11 +11,6 @@
//
//===----------------------------------------------------------------------===//
-//===----------------------------------------------------------------------===//
-//=== WARNING: Implementation here must contain only generic UNIX code that
-//=== is guaranteed to work on *all* UNIX variants.
-//===----------------------------------------------------------------------===//
-
#include "Unix.h"
#include "llvm/System/Process.h"
@@ -44,16 +39,7 @@
}
bool MappedFile::initialize(std::string* ErrMsg) {
- int mode = 0;
- if (Options & READ_ACCESS)
- if (Options & WRITE_ACCESS)
- mode = O_RDWR;
- else
- mode = O_RDONLY;
- else if (Options & WRITE_ACCESS)
- mode = O_WRONLY;
-
- int FD = ::open(Path.c_str(), mode);
+ int FD = ::open(Path.c_str(), O_RDONLY);
if (FD < 0) {
MakeErrMsg(ErrMsg, "can't open file '" + Path.toString() + "'");
return true;
@@ -80,8 +66,6 @@
assert(MapInfo && "MappedFile not initialized");
if (!isMapped()) return;
- if (Options & WRITE_ACCESS)
- ::msync(BasePtr, MapInfo->Size, MS_SYNC);
::munmap(BasePtr, MapInfo->Size);
BasePtr = 0; // Mark this as non-mapped.
}
@@ -90,28 +74,13 @@
assert(MapInfo && "MappedFile not initialized");
if (isMapped()) return BasePtr;
- int prot = PROT_NONE;
- int flags = 0;
+ int prot = PROT_READ;
+ int flags = MAP_PRIVATE;
#ifdef MAP_FILE
flags |= MAP_FILE;
#endif
- if (Options == 0) {
- prot = PROT_READ;
- flags = MAP_PRIVATE;
- } else {
- if (Options & READ_ACCESS)
- prot |= PROT_READ;
- if (Options & WRITE_ACCESS)
- prot |= PROT_WRITE;
- if (Options & EXEC_ACCESS)
- prot |= PROT_EXEC;
- if (Options & SHARED_MAPPING)
- flags |= MAP_SHARED;
- else
- flags |= MAP_PRIVATE;
- }
- size_t map_size = ((MapInfo->Size / Process::GetPageSize())+1) *
- Process::GetPageSize();
+ size_t PageSize = Process::GetPageSize();
+ size_t map_size = ((MapInfo->Size / PageSize)+1) * PageSize;
BasePtr = ::mmap(0, map_size, prot, flags, MapInfo->FD, 0);
if (BasePtr == MAP_FAILED) {
@@ -126,30 +95,3 @@
return MapInfo->Size;
}
-bool MappedFile::resize(size_t new_size, std::string* ErrMsg) {
- assert(MapInfo && "MappedFile not initialized");
-
- // Take the mapping out of memory
- unmap();
-
- // Adjust the current size to a page boundary
- size_t cur_size = ((MapInfo->Size / Process::GetPageSize())+1) *
- Process::GetPageSize();
-
- // Adjust the new_size to a page boundary
- new_size = ((new_size / Process::GetPageSize())+1) *
- Process::GetPageSize();
-
- // If the file needs to be extended
- if (new_size > cur_size) {
- // Ensure we can allocate at least the idodes necessary to handle the
- // file size requested.
- if ((off_t)-1 == ::lseek(MapInfo->FD, new_size, SEEK_SET))
- return MakeErrMsg(ErrMsg, "Can't lseek: ");
- if (-1 == ::write(MapInfo->FD, "\0", 1))
- return MakeErrMsg(ErrMsg, "Can't write: ");
- }
-
- // Put the mapping back into memory.
- return map(ErrMsg);
-}
diff --git a/lib/System/Win32/MappedFile.inc b/lib/System/Win32/MappedFile.inc
index de8eec3..830905d 100644
--- a/lib/System/Win32/MappedFile.inc
+++ b/lib/System/Win32/MappedFile.inc
@@ -33,17 +33,13 @@
MapInfo->hFile = INVALID_HANDLE_VALUE;
MapInfo->hMapping = NULL;
- DWORD mode = Options & WRITE_ACCESS ? GENERIC_WRITE : GENERIC_READ;
- DWORD disposition = Options & WRITE_ACCESS ? OPEN_ALWAYS : OPEN_EXISTING;
- DWORD share = Options & WRITE_ACCESS ? FILE_SHARE_WRITE : FILE_SHARE_READ;
- share = Options & SHARED_MAPPING ? share : 0;
- MapInfo->hFile = CreateFile(Path.c_str(), mode, share, NULL, disposition,
- FILE_ATTRIBUTE_NORMAL, NULL);
+ MapInfo->hFile = CreateFile(Path.c_str(), GENERIC_READ, 0, NULL,
+ OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (MapInfo->hFile == INVALID_HANDLE_VALUE) {
delete MapInfo;
MapInfo = NULL;
return MakeErrMsg(ErrMsg,
- std::string("Can't open file: ") + Path.toString());
+ std::string("Can't open file: ") + Path.toString());
}
LARGE_INTEGER size;
@@ -81,19 +77,14 @@
void* MappedFile::map(std::string* ErrMsg) {
if (!isMapped()) {
- DWORD prot = PAGE_READONLY;
- if (Options & EXEC_ACCESS)
- prot = SEC_IMAGE;
- else if (Options & WRITE_ACCESS)
- prot = PAGE_READWRITE;
- MapInfo->hMapping = CreateFileMapping(MapInfo->hFile, NULL, prot, 0, 0, NULL);
+ MapInfo->hMapping = CreateFileMapping(MapInfo->hFile, NULL, PAGE_READONLY,
+ 0, 0, NULL);
if (MapInfo->hMapping == NULL) {
MakeErrMsg(ErrMsg, std::string("Can't map file: ") + Path.toString());
return 0;
}
- prot = (Options & WRITE_ACCESS) ? FILE_MAP_WRITE : FILE_MAP_READ;
- BasePtr = MapViewOfFileEx(MapInfo->hMapping, prot, 0, 0, 0, NULL);
+ BasePtr = MapViewOfFileEx(MapInfo->hMapping, FILE_MAP_READ, 0, 0, 0, NULL);
if (BasePtr == NULL) {
CloseHandle(MapInfo->hMapping);
MapInfo->hMapping = NULL;
@@ -109,32 +100,5 @@
return MapInfo->size;
}
-bool MappedFile::resize(size_t new_size, std::string* ErrMsg) {
- assert(MapInfo && "MappedFile not initialized");
-
- // Take the mapping out of memory.
- unmap();
-
- // Adjust the new_size to a page boundary.
- size_t pagesizem1 = Process::GetPageSize() - 1;
- new_size = (new_size + pagesizem1) & ~pagesizem1;
-
- // If the file needs to be extended, do so.
- if (new_size > MapInfo->size) {
- LARGE_INTEGER eof;
- eof.QuadPart = new_size;
- if (!SetFilePointerEx(MapInfo->hFile, eof, NULL, FILE_BEGIN))
- return MakeErrMsg(ErrMsg,
- std::string("Can't set end of file: ") + Path.toString());
- if (!SetEndOfFile(MapInfo->hFile))
- return MakeErrMsg(ErrMsg,
- std::string("Can't set end of file: ") + Path.toString());
- MapInfo->size = new_size;
- }
-
- // Remap the file.
- return map(ErrMsg);
-}
-
}