1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
//===- llvm-link.cpp - Low-level LLVM linker ------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This utility may be invoked in the following manner:
// llvm-link a.bc b.bc c.bc -o x.bc
//
//===----------------------------------------------------------------------===//
#include "llvm/Linker.h"
#include "llvm/Module.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/System/Signals.h"
#include "llvm/System/Path.h"
#include <fstream>
#include <iostream>
#include <memory>
using namespace llvm;
static cl::list<std::string>
InputFilenames(cl::Positional, cl::OneOrMore,
cl::desc("<input bitcode files>"));
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"));
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 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) {
sys::Path Filename;
if (!Filename.set(FN)) {
cerr << "Invalid file name: '" << FN << "'\n";
return std::auto_ptr<Module>();
}
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, &ErrorMessage);
delete Buffer;
}
if (Result) return std::auto_ptr<Module>(Result); // Load successful!
if (Verbose) {
cerr << "Error opening bitcode file: '" << Filename.c_str() << "'";
if (ErrorMessage.size()) cerr << ": " << ErrorMessage;
cerr << "\n";
}
} else {
cerr << "Bitcode file: '" << Filename.c_str() << "' does not exist.\n";
}
return std::auto_ptr<Module>();
}
int main(int argc, char **argv) {
llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
cl::ParseCommandLineOptions(argc, argv, "llvm linker\n");
sys::PrintStackTraceOnErrorSignal();
assert(InputFilenames.size() > 0 && "OneOrMore is not working");
unsigned BaseArg = 0;
std::string ErrorMessage;
std::auto_ptr<Module> Composite(LoadFile(InputFilenames[BaseArg]));
if (Composite.get() == 0) {
cerr << argv[0] << ": error loading file '"
<< InputFilenames[BaseArg] << "'\n";
return 1;
}
for (unsigned i = BaseArg+1; i < InputFilenames.size(); ++i) {
std::auto_ptr<Module> M(LoadFile(InputFilenames[i]));
if (M.get() == 0) {
cerr << argv[0] << ": error loading file '" <<InputFilenames[i]<< "'\n";
return 1;
}
if (Verbose) cerr << "Linking in '" << InputFilenames[i] << "'\n";
if (Linker::LinkModules(Composite.get(), M.get(), &ErrorMessage)) {
cerr << argv[0] << ": link error in '" << InputFilenames[i]
<< "': " << ErrorMessage << "\n";
return 1;
}
}
// 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();
// 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 << argv[0] << ": error opening '" << OutputFilename
<< "': file exists!\n"
<< "Use -f command line argument to force output\n";
return 1;
}
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 << argv[0] << ": error opening '" << OutputFilename << "'!\n";
return 1;
}
// Make sure that the Out file gets unlinked from the disk if we get a
// SIGINT
sys::RemoveFileOnSignal(sys::Path(OutputFilename));
}
if (verifyModule(*Composite.get())) {
cerr << argv[0] << ": linked module is broken!\n";
return 1;
}
if (Verbose) cerr << "Writing bitcode...\n";
WriteBitcodeToFile(Composite.get(), *Out);
if (Out != &std::cout) delete Out;
return 0;
}
|
