//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Reid Spencer and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
-// This file contains routines to handle linking together LLVM bytecode files,
+// This file contains routines to handle linking together LLVM bitcode files,
// and to handle annoying things like static libraries.
//
//===----------------------------------------------------------------------===//
#include "llvm/Linker.h"
#include "llvm/Module.h"
-
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/system_error.h"
using namespace llvm;
// LinkItems - This function is the main entry point into linking. It takes a
// list of LinkItem which indicates the order the files should be linked and
// how each file should be treated (plain file or with library search). The
-// function only links bytecode and produces a result list of items that are
+// function only links bitcode and produces a result list of items that are
// native objects.
bool
Linker::LinkInItems(const ItemList& Items, ItemList& NativeItems) {
I != E; ++I) {
if (I->second) {
// Link in the library suggested.
- bool is_file = true;
- if (LinkInLibrary(I->first,is_file))
+ bool is_native = false;
+ if (LinkInLibrary(I->first, is_native))
return true;
- if (!is_file)
+ if (is_native)
NativeItems.push_back(*I);
} else {
// Link in the file suggested
- if (LinkInFile(sys::Path(I->first)))
+ bool is_native = false;
+ if (LinkInFile(sys::Path(I->first), is_native))
return true;
+ if (is_native)
+ NativeItems.push_back(*I);
}
}
// that module should also be aggregated with duplicates eliminated. This is
// now the time to process the dependent libraries to resolve any remaining
// symbols.
- bool is_bytecode;
+ bool is_native;
for (Module::lib_iterator I = Composite->lib_begin(),
- E = Composite->lib_end(); I != E; ++I)
- if(LinkInLibrary(*I, is_bytecode))
+ E = Composite->lib_end(); I != E; ++I) {
+ if(LinkInLibrary(*I, is_native))
return true;
+ if (is_native)
+ NativeItems.push_back(std::make_pair(*I, true));
+ }
return false;
}
/// LinkInLibrary - links one library into the HeadModule.
///
-bool Linker::LinkInLibrary(const std::string& Lib, bool& is_file) {
- is_file = false;
+bool Linker::LinkInLibrary(StringRef Lib, bool& is_native) {
+ is_native = false;
// Determine where this library lives.
sys::Path Pathname = FindLib(Lib);
if (Pathname.isEmpty())
- return warning("Cannot find library '" + Lib + "'");
+ return error("Cannot find library '" + Lib.str() + "'");
// If its an archive, try to link it in
std::string Magic;
Pathname.getMagicNumber(Magic, 64);
switch (sys::IdentifyFileType(Magic.c_str(), 64)) {
- case sys::BytecodeFileType:
- case sys::CompressedBytecodeFileType:
+ default: llvm_unreachable("Bad file type identification");
+ case sys::Unknown_FileType:
+ return warning("Supposed library '" + Lib.str() + "' isn't a library.");
+
+ case sys::Bitcode_FileType:
// LLVM ".so" file.
- if (LinkInFile(Pathname))
- return error("Cannot link file '" + Pathname.toString() + "'");
- is_file = true;
+ if (LinkInFile(Pathname, is_native))
+ return true;
break;
- case sys::ArchiveFileType:
- if (LinkInArchive(Pathname))
- return error("Cannot link archive '" + Pathname.toString() + "'");
+
+ case sys::Archive_FileType:
+ if (LinkInArchive(Pathname, is_native))
+ return error("Cannot link archive '" + Pathname.str() + "'");
+ break;
+
+ case sys::ELF_Relocatable_FileType:
+ case sys::ELF_SharedObject_FileType:
+ case sys::Mach_O_Object_FileType:
+ case sys::Mach_O_FixedVirtualMemorySharedLib_FileType:
+ case sys::Mach_O_DynamicallyLinkedSharedLib_FileType:
+ case sys::Mach_O_DynamicallyLinkedSharedLibStub_FileType:
+ case sys::COFF_FileType:
+ is_native = true;
break;
- default:
- return warning("Supposed library '" + Lib + "' isn't a library.");
}
return false;
}
/// LinkLibraries - takes the specified library files and links them into the
-/// main bytecode object file.
+/// main bitcode object file.
///
/// Inputs:
/// Libraries - The list of libraries to link into the module.
bool Linker::LinkInLibraries(const std::vector<std::string> &Libraries) {
// Process the set of libraries we've been provided.
- bool is_bytecode;
+ bool is_native = false;
for (unsigned i = 0; i < Libraries.size(); ++i)
- if (LinkInLibrary(Libraries[i], is_bytecode))
+ if (LinkInLibrary(Libraries[i], is_native))
return true;
// At this point we have processed all the libraries provided to us. Since
const Module::LibraryListType& DepLibs = Composite->getLibraries();
for (Module::LibraryListType::const_iterator I = DepLibs.begin(),
E = DepLibs.end(); I != E; ++I)
- if (LinkInLibrary(*I, is_bytecode))
+ if (LinkInLibrary(*I, is_native))
return true;
return false;
}
-/// LinkInFile - opens a bytecode file and links in all objects which
+/// LinkInFile - opens a bitcode file and links in all objects which
/// provide symbols that are currently undefined.
///
/// Inputs:
-/// File - The pathname of the bytecode file.
+/// File - The pathname of the bitcode file.
///
/// Outputs:
/// ErrorMessage - A C++ string detailing what error occurred, if any.
/// TRUE - An error occurred.
/// FALSE - No errors.
///
-bool Linker::LinkInFile(const sys::Path &File) {
- // Make sure we can at least read the file
- if (!File.canRead())
- return error("Cannot find linker input '" + File.toString() + "'");
-
- // A user may specify an ar archive without -l, perhaps because it
- // is not installed as a library. Detect that and link the library.
- if (File.isArchive()) {
- if (LinkInArchive(File))
- return error("Cannot link archive '" + File.toString() + "'");
- } else if (File.isBytecodeFile()) {
- verbose("Linking bytecode file '" + File.toString() + "'");
-
- std::auto_ptr<Module> M(LoadObject(File));
- if (M.get() == 0)
- return error("Cannot load file '" + File.toString() + "'" + Error);
- if (LinkInModule(M.get()))
- return error("Cannot link file '" + File.toString() + "'" + Error);
-
- verbose("Linked in file '" + File.toString() + "'");
- } else {
- return warning("File of unknown type '" + File.toString() + "' ignored.");
+bool Linker::LinkInFile(const sys::Path &File, bool &is_native) {
+ is_native = false;
+
+ // Check for a file of name "-", which means "read standard input"
+ if (File.str() == "-") {
+ std::auto_ptr<Module> M;
+ OwningPtr<MemoryBuffer> Buffer;
+ error_code ec;
+ if (!(ec = MemoryBuffer::getSTDIN(Buffer))) {
+ if (!Buffer->getBufferSize()) {
+ Error = "standard input is empty";
+ } else {
+ M.reset(ParseBitcodeFile(Buffer.get(), Context, &Error));
+ if (M.get())
+ if (!LinkInModule(M.get(), &Error))
+ return false;
+ }
+ }
+ return error("Cannot link stdin: " + ec.message());
+ }
+
+ // Determine what variety of file it is.
+ std::string Magic;
+ if (!File.getMagicNumber(Magic, 64))
+ return error("Cannot find linker input '" + File.str() + "'");
+
+ switch (sys::IdentifyFileType(Magic.c_str(), 64)) {
+ default: llvm_unreachable("Bad file type identification");
+ case sys::Unknown_FileType:
+ return warning("Ignoring file '" + File.str() +
+ "' because does not contain bitcode.");
+
+ case sys::Archive_FileType:
+ // A user may specify an ar archive without -l, perhaps because it
+ // is not installed as a library. Detect that and link the archive.
+ if (LinkInArchive(File, is_native))
+ return true;
+ break;
+
+ case sys::Bitcode_FileType: {
+ verbose("Linking bitcode file '" + File.str() + "'");
+ std::auto_ptr<Module> M(LoadObject(File));
+ if (M.get() == 0)
+ return error("Cannot load file '" + File.str() + "': " + Error);
+ if (LinkInModule(M.get(), &Error))
+ return error("Cannot link file '" + File.str() + "': " + Error);
+
+ verbose("Linked in file '" + File.str() + "'");
+ break;
+ }
+
+ case sys::ELF_Relocatable_FileType:
+ case sys::ELF_SharedObject_FileType:
+ case sys::Mach_O_Object_FileType:
+ case sys::Mach_O_FixedVirtualMemorySharedLib_FileType:
+ case sys::Mach_O_DynamicallyLinkedSharedLib_FileType:
+ case sys::Mach_O_DynamicallyLinkedSharedLibStub_FileType:
+ case sys::COFF_FileType:
+ is_native = true;
+ break;
}
return false;
}
/// or relative pathname, or as a file somewhere in LLVM_LIB_SEARCH_PATH.
///
/// Inputs:
-/// Files - A vector of sys::Path indicating the LLVM bytecode filenames
+/// Files - A vector of sys::Path indicating the LLVM bitcode filenames
/// to be linked. The names can refer to a mixture of pure LLVM
-/// bytecode files and archive (ar) formatted files.
+/// bitcode files and archive (ar) formatted files.
///
/// Return value:
/// FALSE - No errors.
/// TRUE - Some error occurred.
///
bool Linker::LinkInFiles(const std::vector<sys::Path> &Files) {
+ bool is_native;
for (unsigned i = 0; i < Files.size(); ++i)
- if (LinkInFile(Files[i]))
+ if (LinkInFile(Files[i], is_native))
return true;
return false;
}
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