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
|
//===----------------------------------------------------------------------===//
// 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.
//
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Utils/Linker.h"
#include "llvm/Bytecode/Reader.h"
#include "llvm/Bytecode/Writer.h"
#include "llvm/Module.h"
#include "Support/CommandLine.h"
#include "Support/Signals.h"
#include <fstream>
#include <memory>
#include <sys/types.h> // For FileExists
#include <sys/stat.h>
using std::cerr;
static cl::list<std::string>
InputFilenames(cl::Positional, cl::OneOrMore,
cl::desc("Load <arg> files, linking them together"));
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);
static cl::list<std::string>
LibPaths("L", cl::desc("Specify a library search path"), cl::ZeroOrMore,
cl::value_desc("directory"), cl::Prefix);
// 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;
}
// LoadFile - Read the specified bytecode 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;
while (1) {
if (Verbose) cerr << "Loading '" << Filename << "'\n";
if (FileExists(Filename)) FoundAFile = true;
Module *Result = ParseBytecodeFile(Filename, &ErrorMessage);
if (Result) return std::auto_ptr<Module>(Result); // Load successful!
if (Verbose) {
cerr << "Error opening bytecode file: '" << Filename << "'";
if (ErrorMessage.size()) cerr << ": " << ErrorMessage;
cerr << "\n";
}
if (NextLibPathIdx == LibPaths.size()) break;
Filename = LibPaths[NextLibPathIdx++] + "/" + FN;
}
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");
assert(InputFilenames.size() > 0 && "OneOrMore is not working");
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]));
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;
if (Verbose) cerr << "Linking in '" << InputFilenames[i] << "'\n";
if (LinkModules(Composite.get(), M.get(), &ErrorMessage)) {
cerr << "Error linking in '" << InputFilenames[i] << "': "
<< ErrorMessage << "\n";
return 1;
}
}
if (DumpAsm) cerr << "Here's the assembly:\n" << Composite.get();
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"
<< "Use -f command line argument to force output\n";
return 1;
}
Out = new std::ofstream(OutputFilename.c_str());
if (!Out->good()) {
cerr << "Error opening '" << OutputFilename << "'!\n";
return 1;
}
// Make sure that the Out file gets unlink'd from the disk if we get a
// SIGINT
RemoveFileOnSignal(OutputFilename);
}
if (Verbose) cerr << "Writing bytecode...\n";
WriteBytecodeToFile(Composite.get(), *Out);
if (Out != &std::cout) delete Out;
return 0;
}
|
