change the archive stuff to use MemoryBuffer instead of mappedfile.
MemoryBuffer is higher level and more closely matches the model
needed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49029 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Archive/Archive.cpp b/lib/Archive/Archive.cpp
index c5da114..e32c716 100644
--- a/lib/Archive/Archive.cpp
+++ b/lib/Archive/Archive.cpp
@@ -17,7 +17,6 @@
#include "llvm/ModuleProvider.h"
#include "llvm/Module.h"
#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/System/MappedFile.h"
#include "llvm/System/Process.h"
#include <memory>
#include <cstring>
@@ -145,25 +144,19 @@
}
bool
-Archive::mapToMemory(std::string* ErrMsg)
-{
- mapfile = new sys::MappedFile();
- if (mapfile->open(archPath, ErrMsg))
+Archive::mapToMemory(std::string* ErrMsg) {
+ mapfile = MemoryBuffer::getFile(archPath.c_str(), archPath.size(), ErrMsg);
+ if (mapfile == 0)
return true;
- if (!(base = (char*) mapfile->map(ErrMsg)))
- return true;
+ base = mapfile->getBufferStart();
return false;
}
void Archive::cleanUpMemory() {
// Shutdown the file mapping
- if (mapfile) {
- mapfile->close();
- delete mapfile;
-
- mapfile = 0;
- base = 0;
- }
+ delete mapfile;
+ mapfile = 0;
+ base = 0;
// Forget the entire symbol table
symTab.clear();
diff --git a/lib/Archive/ArchiveReader.cpp b/lib/Archive/ArchiveReader.cpp
index e279a3d..fd0e30a 100644
--- a/lib/Archive/ArchiveReader.cpp
+++ b/lib/Archive/ArchiveReader.cpp
@@ -14,7 +14,6 @@
#include "ArchiveInternals.h"
#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/System/MappedFile.h"
#include "llvm/Module.h"
#include <memory>
using namespace llvm;
@@ -239,7 +238,7 @@
bool
Archive::checkSignature(std::string* error) {
// Check the magic string at file's header
- if (mapfile->size() < 8 || memcmp(base, ARFILE_MAGIC, 8)) {
+ if (mapfile->getBufferSize() < 8 || memcmp(base, ARFILE_MAGIC, 8)) {
if (error)
*error = "invalid signature for an archive file";
return false;
@@ -257,7 +256,7 @@
members.clear();
symTab.clear();
const char *At = base;
- const char *End = base + mapfile->size();
+ const char *End = mapfile->getBufferEnd();
if (!checkSignature(error))
return false;
@@ -370,7 +369,7 @@
members.clear();
symTab.clear();
const char *At = base;
- const char *End = base + mapfile->size();
+ const char *End = mapfile->getBufferEnd();
// Make sure we're dealing with an archive
if (!checkSignature(ErrorMsg))
@@ -478,7 +477,8 @@
// Module hasn't been loaded yet, we need to load it
const char* modptr = base + fileOffset;
- ArchiveMember* mbr = parseMemberHeader(modptr, base + mapfile->size(),ErrMsg);
+ ArchiveMember* mbr = parseMemberHeader(modptr, mapfile->getBufferEnd(),
+ ErrMsg);
if (!mbr)
return 0;
@@ -517,8 +517,8 @@
// below.
// Get a pointer to the first file
- const char* At = ((const char*)base) + firstFileOffset;
- const char* End = ((const char*)base) + mapfile->size();
+ const char* At = base + firstFileOffset;
+ const char* End = mapfile->getBufferEnd();
while ( At < End) {
// Compute the offset to be put in the symbol table
diff --git a/lib/Archive/ArchiveWriter.cpp b/lib/Archive/ArchiveWriter.cpp
index 6a71026..afe9819 100644
--- a/lib/Archive/ArchiveWriter.cpp
+++ b/lib/Archive/ArchiveWriter.cpp
@@ -13,7 +13,8 @@
#include "ArchiveInternals.h"
#include "llvm/Bitcode/ReaderWriter.h"
-#include "llvm/System/MappedFile.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/Support/MemoryBuffer.h"
#include "llvm/System/Signals.h"
#include "llvm/System/Process.h"
#include "llvm/ModuleProvider.h"
@@ -208,15 +209,15 @@
// Get the data and its size either from the
// member's in-memory data or directly from the file.
size_t fSize = member.getSize();
- const char* data = (const char*)member.getData();
- sys::MappedFile* mFile = 0;
+ const char *data = (const char*)member.getData();
+ MemoryBuffer *mFile = 0;
if (!data) {
- mFile = new sys::MappedFile();
- if (mFile->open(member.getPath(), ErrMsg))
+ mFile = MemoryBuffer::getFile(member.getPath().c_str(),
+ member.getPath().size(), ErrMsg);
+ if (mFile == 0)
return true;
- if (!(data = (const char*) mFile->map(ErrMsg)))
- return true;
- fSize = mFile->size();
+ data = mFile->getBufferStart();
+ fSize = mFile->getBufferSize();
}
// Now that we have the data in memory, update the
@@ -247,10 +248,7 @@
// We don't need this module any more.
delete MP;
} else {
- if (mFile != 0) {
- mFile->close();
- delete mFile;
- }
+ delete mFile;
if (ErrMsg)
*ErrMsg = "Can't parse bitcode member: " + member.getPath().toString()
+ ": " + *ErrMsg;
@@ -281,10 +279,7 @@
ARFile << ARFILE_PAD;
// Close the mapped file if it was opened
- if (mFile != 0) {
- mFile->close();
- delete mFile;
- }
+ delete mFile;
return false;
}
@@ -349,7 +344,7 @@
{
// Make sure they haven't opened up the file, not loaded it,
// but are now trying to write it which would wipe out the file.
- if (members.empty() && mapfile && mapfile->size() > 8) {
+ if (members.empty() && mapfile && mapfile->getBufferSize() > 8) {
if (ErrMsg)
*ErrMsg = "Can't write an archive not opened for writing";
return true;
@@ -408,18 +403,17 @@
// ensure compatibility with other archivers we need to put the symbol
// table first in the file. Unfortunately, this means mapping the file
// we just wrote back in and copying it to the destination file.
+ sys::Path FinalFilePath = archPath;
// Map in the archive we just wrote.
- sys::MappedFile arch;
- if (arch.open(TmpArchive, ErrMsg))
- return true;
- const char* base;
- if (!(base = (const char*) arch.map(ErrMsg)))
- return true;
+ {
+ OwningPtr<MemoryBuffer> arch(MemoryBuffer::getFile(TmpArchive.c_str(),
+ TmpArchive.size()));
+ if (arch == 0) return true;
+ const char* base = arch->getBufferStart();
// Open another temporary file in order to avoid invalidating the
// mmapped data
- sys::Path FinalFilePath = archPath;
if (FinalFilePath.createTemporaryFileOnDisk(ErrMsg))
return true;
sys::RemoveFileOnSignal(FinalFilePath);
@@ -456,11 +450,11 @@
// Copy the temporary file contents being sure to skip the file's magic
// number.
FinalFile.write(base + sizeof(ARFILE_MAGIC)-1,
- arch.size()-sizeof(ARFILE_MAGIC)+1);
+ arch->getBufferSize()-sizeof(ARFILE_MAGIC)+1);
// Close up shop
FinalFile.close();
- arch.close();
+ } // free arch.
// Move the final file over top of TmpArchive
if (FinalFilePath.renamePathOnDisk(TmpArchive, ErrMsg))