+//===- llvm-link.cpp - Low-level LLVM linker ------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
//===----------------------------------------------------------------------===//
-// LLVM 'LINK' UTILITY
//
// This utility may be invoked in the following manner:
-// link a.bc b.bc c.bc -o x.bc
-//
-// Alternatively, this can be used as an 'ar' tool as well. If invoked as
-// either 'ar' or 'llvm-ar', it accepts a 'rc' parameter as well.
+// llvm-link a.bc b.bc c.bc -o x.bc
//
//===----------------------------------------------------------------------===//
-#include "llvm/Transforms/Utils/Linker.h"
-#include "llvm/Bytecode/Reader.h"
-#include "llvm/Bytecode/Writer.h"
+#include "llvm/Linker.h"
+#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
-#include "Support/CommandLine.h"
-#include "Support/Signals.h"
+#include "llvm/Analysis/Verifier.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Streams.h"
+#include "llvm/System/Signals.h"
+#include "llvm/System/Path.h"
#include <fstream>
+#include <iostream>
#include <memory>
-#include <sys/types.h> // For FileExists
-#include <sys/stat.h>
+using namespace llvm;
+static cl::list<std::string>
+InputFilenames(cl::Positional, cl::OneOrMore,
+ cl::desc("<input bitcode files>"));
-cl::StringList InputFilenames("", "Load <arg> files, linking them together",
- cl::OneOrMore);
-cl::String OutputFilename("o", "Override output filename", cl::NoFlags, "-");
-cl::Flag Force ("f", "Overwrite output files", cl::NoFlags, false);
-cl::Flag Verbose ("v", "Print information about actions taken");
-cl::Flag DumpAsm ("d", "Print assembly as linked", cl::Hidden, false);
-cl::StringList LibPaths ("L", "Specify a library search path", cl::ZeroOrMore);
-cl::StringList Libraries ("l", "Specify libraries to link to", cl::ZeroOrMore);
+static cl::opt<std::string>
+OutputFilename("o", cl::desc("Override output filename"), cl::init("-"),
+ cl::value_desc("filename"));
+static cl::opt<bool> Force("f", cl::desc("Overwrite output files"));
-// FileExists - Return true if the specified string is an openable file...
-static inline bool FileExists(const std::string &FN) {
- struct stat StatBuf;
- return stat(FN.c_str(), &StatBuf) != -1;
-}
+static cl::opt<bool>
+Verbose("v", cl::desc("Print information about actions taken"));
+
+static cl::opt<bool>
+DumpAsm("d", cl::desc("Print assembly as linked"), cl::Hidden);
-// LoadFile - Read the specified bytecode file in and return it. This routine
+// LoadFile - Read the specified bitcode file in and return it. This routine
// searches the link path for the specified file to try to find it...
//
-static inline std::auto_ptr<Module> LoadFile(const std::string &FN) {
- std::string Filename = FN;
- std::string ErrorMessage;
-
- unsigned NextLibPathIdx = 0;
- bool FoundAFile = false;
+static inline std::auto_ptr<Module> LoadFile(const std::string &FN,
+ LLVMContext* Context) {
+ sys::Path Filename;
+ if (!Filename.set(FN)) {
+ cerr << "Invalid file name: '" << FN << "'\n";
+ return std::auto_ptr<Module>();
+ }
- while (1) {
- if (Verbose) cerr << "Loading '" << Filename << "'\n";
- if (FileExists(Filename)) FoundAFile = true;
- Module *Result = ParseBytecodeFile(Filename, &ErrorMessage);
+ std::string ErrorMessage;
+ if (Filename.exists()) {
+ if (Verbose) cerr << "Loading '" << Filename.c_str() << "'\n";
+ Module* Result = 0;
+
+ const std::string &FNStr = Filename.toString();
+ if (MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(FNStr,
+ &ErrorMessage)) {
+ Result = ParseBitcodeFile(Buffer, Context, &ErrorMessage);
+ delete Buffer;
+ }
if (Result) return std::auto_ptr<Module>(Result); // Load successful!
if (Verbose) {
- cerr << "Error opening bytecode file: '" << Filename << "'";
+ cerr << "Error opening bitcode file: '" << Filename.c_str() << "'";
if (ErrorMessage.size()) cerr << ": " << ErrorMessage;
cerr << "\n";
}
-
- if (NextLibPathIdx == LibPaths.size()) break;
- Filename = LibPaths[NextLibPathIdx++] + "/" + FN;
+ } else {
+ cerr << "Bitcode file: '" << Filename.c_str() << "' does not exist.\n";
}
- if (FoundAFile)
- cerr << "Bytecode file '" << FN << "' corrupt! "
- << "Use 'link -v ...' for more info.\n";
- else
- cerr << "Could not locate bytecode file: '" << FN << "'\n";
return std::auto_ptr<Module>();
}
-
-
-
int main(int argc, char **argv) {
- cl::ParseCommandLineOptions(argc, argv, " llvm linker\n",
- cl::EnableSingleLetterArgValue |
- cl::DisableSingleLetterArgGrouping);
- assert(InputFilenames.size() > 0 && "OneOrMore is not working");
+ // Print a stack trace if we signal out.
+ sys::PrintStackTraceOnErrorSignal();
+ PrettyStackTraceProgram X(argc, argv);
+
+ LLVMContext Context;
+ llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+ cl::ParseCommandLineOptions(argc, argv, "llvm linker\n");
unsigned BaseArg = 0;
std::string ErrorMessage;
- // TODO: TEST argv[0] for llvm-ar forms... for now, this is a huge hack.
- if (InputFilenames.size() >= 3 && InputFilenames[0] == "rc" &&
- OutputFilename == "-") {
- BaseArg = 2;
- OutputFilename = InputFilenames[1];
+ std::auto_ptr<Module> Composite(LoadFile(InputFilenames[BaseArg], &Context));
+ if (Composite.get() == 0) {
+ cerr << argv[0] << ": error loading file '"
+ << InputFilenames[BaseArg] << "'\n";
+ return 1;
}
- if (!Libraries.empty())
- cerr << "LLVM Linker Warning: Linking to libraries is unimplemented!\n";
-
- std::auto_ptr<Module> Composite(LoadFile(InputFilenames[BaseArg]));
- if (Composite.get() == 0) return 1;
-
for (unsigned i = BaseArg+1; i < InputFilenames.size(); ++i) {
- std::auto_ptr<Module> M(LoadFile(InputFilenames[i]));
- if (M.get() == 0) return 1;
+ std::auto_ptr<Module> M(LoadFile(InputFilenames[i], &Context));
+ if (M.get() == 0) {
+ cerr << argv[0] << ": error loading file '" <<InputFilenames[i]<< "'\n";
+ return 1;
+ }
if (Verbose) cerr << "Linking in '" << InputFilenames[i] << "'\n";
- if (LinkModules(Composite.get(), M.get(), &ErrorMessage)) {
- cerr << "Error linking in '" << InputFilenames[i] << "': "
- << ErrorMessage << "\n";
+ if (Linker::LinkModules(Composite.get(), M.get(), &ErrorMessage)) {
+ cerr << argv[0] << ": link error in '" << InputFilenames[i]
+ << "': " << ErrorMessage << "\n";
return 1;
}
}
- if (DumpAsm) cerr << "Here's the assembly:\n" << Composite.get();
+ // TODO: Iterate over the -l list and link in any modules containing
+ // global symbols that have not been resolved so far.
+
+ if (DumpAsm) cerr << "Here's the assembly:\n" << *Composite.get();
- ostream *Out = &cout; // Default to printing to stdout...
+ // FIXME: cout is not binary!
+ std::ostream *Out = &std::cout; // Default to printing to stdout...
if (OutputFilename != "-") {
if (!Force && std::ifstream(OutputFilename.c_str())) {
// If force is not specified, make sure not to overwrite a file!
- cerr << "Error opening '" << OutputFilename << "': File exists!\n"
+ cerr << argv[0] << ": error opening '" << OutputFilename
+ << "': file exists!\n"
<< "Use -f command line argument to force output\n";
return 1;
}
- Out = new std::ofstream(OutputFilename.c_str());
+ std::ios::openmode io_mode = std::ios::out | std::ios::trunc |
+ std::ios::binary;
+ Out = new std::ofstream(OutputFilename.c_str(), io_mode);
if (!Out->good()) {
- cerr << "Error opening '" << OutputFilename << "'!\n";
+ cerr << argv[0] << ": error opening '" << OutputFilename << "'!\n";
return 1;
}
- // Make sure that the Out file gets unlink'd from the disk if we get a
+ // Make sure that the Out file gets unlinked from the disk if we get a
// SIGINT
- RemoveFileOnSignal(OutputFilename);
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+ }
+
+ if (verifyModule(*Composite.get())) {
+ cerr << argv[0] << ": linked module is broken!\n";
+ return 1;
}
- if (Verbose) cerr << "Writing bytecode...\n";
- WriteBytecodeToFile(Composite.get(), *Out);
+ if (Verbose) cerr << "Writing bitcode...\n";
+ WriteBitcodeToFile(Composite.get(), *Out);
if (Out != &std::cout) delete Out;
return 0;
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