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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
//===-- llvm-nm.cpp - Symbol table dumping utility for llvm ---------------===//
//
// 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 program is a utility that works like traditional Unix "nm",
// that is, it prints out the names of symbols in a bytecode file,
// along with some information about each symbol.
//
// This "nm" does not print symbols' addresses. It supports many of
// the features of GNU "nm", including its different output formats.
//
//===----------------------------------------------------------------------===//
#include "llvm/Module.h"
#include "llvm/Bytecode/Reader.h"
#include "Support/CommandLine.h"
#include "Support/FileUtilities.h"
#include "llvm/System/Signals.h"
#include <cctype>
#include <cerrno>
#include <cstring>
#include <iostream>
using namespace llvm;
namespace {
enum OutputFormatTy { bsd, sysv, posix };
cl::opt<OutputFormatTy>
OutputFormat("format",
cl::desc("Specify output format"),
cl::values(clEnumVal(bsd, "BSD format"),
clEnumVal(sysv, "System V format"),
clEnumVal(posix, "POSIX.2 format"),
clEnumValEnd), cl::init(bsd));
cl::alias OutputFormat2("f", cl::desc("Alias for --format"),
cl::aliasopt(OutputFormat));
cl::list<std::string>
InputFilenames(cl::Positional, cl::desc("<input bytecode files>"),
cl::ZeroOrMore);
cl::opt<bool> UndefinedOnly("undefined-only",
cl::desc("Show only undefined symbols"));
cl::alias UndefinedOnly2("u", cl::desc("Alias for --undefined-only"),
cl::aliasopt(UndefinedOnly));
cl::opt<bool> DefinedOnly("defined-only",
cl::desc("Show only defined symbols"));
cl::opt<bool> ExternalOnly("extern-only",
cl::desc("Show only external symbols"));
cl::alias ExternalOnly2("g", cl::desc("Alias for --extern-only"),
cl::aliasopt(ExternalOnly));
cl::opt<bool> BSDFormat("B", cl::desc("Alias for --format=bsd"));
cl::opt<bool> POSIXFormat("P", cl::desc("Alias for --format=posix"));
bool MultipleFiles = false;
std::string ToolName;
};
char TypeCharForSymbol (GlobalValue &GV) {
if (GV.isExternal ()) return 'U';
if (GV.hasLinkOnceLinkage ()) return 'C';
if (GV.hasWeakLinkage ()) return 'W';
if (isa<Function> (GV) && GV.hasInternalLinkage ()) return 't';
if (isa<Function> (GV)) return 'T';
if (isa<GlobalVariable> (GV) && GV.hasInternalLinkage ()) return 'd';
if (isa<GlobalVariable> (GV)) return 'D';
return '?';
}
void DumpSymbolNameForGlobalValue (GlobalValue &GV) {
const std::string SymbolAddrStr = " "; // Not used yet...
char TypeChar = TypeCharForSymbol (GV);
if ((TypeChar != 'U') && UndefinedOnly)
return;
if ((TypeChar == 'U') && DefinedOnly)
return;
if (GV.hasInternalLinkage () && ExternalOnly)
return;
if (OutputFormat == posix) {
std::cout << GV.getName () << " " << TypeCharForSymbol (GV) << " "
<< SymbolAddrStr << "\n";
} else if (OutputFormat == bsd) {
std::cout << SymbolAddrStr << " " << TypeCharForSymbol (GV) << " "
<< GV.getName () << "\n";
} else if (OutputFormat == sysv) {
std::string PaddedName (GV.getName ());
while (PaddedName.length () < 20)
PaddedName += " ";
std::cout << PaddedName << "|" << SymbolAddrStr << "| "
<< TypeCharForSymbol (GV)
<< " | | | |\n";
}
}
void DumpSymbolNamesFromModule (Module *M) {
const std::string &Filename = M->getModuleIdentifier ();
if (OutputFormat == posix && MultipleFiles) {
std::cout << Filename << ":\n";
} else if (OutputFormat == bsd && MultipleFiles) {
std::cout << "\n" << Filename << ":\n";
} else if (OutputFormat == sysv) {
std::cout << "\n\nSymbols from " << Filename << ":\n\n"
<< "Name Value Class Type"
<< " Size Line Section\n";
}
std::for_each (M->begin (), M->end (), DumpSymbolNameForGlobalValue);
std::for_each (M->gbegin (), M->gend (), DumpSymbolNameForGlobalValue);
}
void DumpSymbolNamesFromFile (std::string &Filename) {
std::string ErrorMessage;
if (Filename != "-" && !FileOpenable (Filename)) {
std::cerr << ToolName << ": " << Filename << ": " << strerror (errno)
<< "\n";
return;
}
// Note: Currently we do not support reading an archive from stdin.
if (Filename == "-" || IsBytecode (Filename)) {
Module *Result = ParseBytecodeFile(Filename, &ErrorMessage);
if (Result) {
DumpSymbolNamesFromModule (Result);
} else {
std::cerr << ToolName << ": " << Filename << ": " << ErrorMessage << "\n";
return;
}
} else if (IsArchive (Filename)) {
std::vector<Module *> Modules;
if (ReadArchiveFile (Filename, Modules, &ErrorMessage)) {
std::cerr << ToolName << ": " << Filename << ": "
<< ErrorMessage << "\n";
return;
}
MultipleFiles = true;
std::for_each (Modules.begin (), Modules.end (), DumpSymbolNamesFromModule);
} else {
std::cerr << ToolName << ": " << Filename << ": "
<< "unrecognizable file type\n";
return;
}
}
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv, " llvm symbol table dumper\n");
PrintStackTraceOnErrorSignal();
ToolName = argv[0];
if (BSDFormat) OutputFormat = bsd;
if (POSIXFormat) OutputFormat = posix;
switch (InputFilenames.size()) {
case 0: InputFilenames.push_back("-");
case 1: break;
default: MultipleFiles = true;
}
std::for_each (InputFilenames.begin (), InputFilenames.end (),
DumpSymbolNamesFromFile);
return 0;
}
|
