blob: dbac32914db91b721307943b68f17fce094b7a43 (
plain)
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
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
//===-- Path.cpp - Implement OS Path Concept --------------------*- C++ -*-===//
//
// 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 header file implements the operating system Path concept.
//
//===----------------------------------------------------------------------===//
#include "llvm/System/Path.h"
#include "llvm/Config/config.h"
#include <cassert>
#include <ostream>
using namespace llvm;
using namespace sys;
//===----------------------------------------------------------------------===//
//=== WARNING: Implementation here must contain only TRULY operating system
//=== independent code.
//===----------------------------------------------------------------------===//
std::ostream& llvm::operator<<(std::ostream &strm, const sys::Path &aPath) {
strm << aPath.toString();
return strm;
}
Path
Path::GetLLVMConfigDir() {
Path result;
#ifdef LLVM_ETCDIR
if (result.set(LLVM_ETCDIR))
return result;
#endif
return GetLLVMDefaultConfigDir();
}
LLVMFileType
sys::IdentifyFileType(const char*magic, unsigned length) {
assert(magic && "Invalid magic number string");
assert(length >=4 && "Invalid magic number length");
switch (magic[0]) {
case 'B':
if (magic[1] == 'C' && magic[2] == (char)0xC0 && magic[3] == (char)0xDE)
return Bitcode_FileType;
break;
case '!':
if (length >= 8)
if (memcmp(magic,"!<arch>\n",8) == 0)
return Archive_FileType;
break;
case '\177':
if (magic[1] == 'E' && magic[2] == 'L' && magic[3] == 'F') {
if (length >= 18 && magic[17] == 0)
switch (magic[16]) {
default: break;
case 1: return ELF_Relocatable_FileType;
case 2: return ELF_Executable_FileType;
case 3: return ELF_SharedObject_FileType;
case 4: return ELF_Core_FileType;
}
}
break;
case 0xCA:
// This is complicated by an overlap with Java class files.
// See the Mach-O section in /usr/share/file/magic for details.
if (magic[1] == char(0xFE) && magic[2] == char(0xBA) &&
magic[3] == char(0xBE)) {
return Mach_O_DynamicallyLinkedSharedLib_FileType;
// FIXME: How does this work?
if (length >= 14 && magic[13] == 0)
switch (magic[12]) {
default: break;
case 1: return Mach_O_Object_FileType;
case 2: return Mach_O_Executable_FileType;
case 3: return Mach_O_FixedVirtualMemorySharedLib_FileType;
case 4: return Mach_O_Core_FileType;
case 5: return Mach_O_PreloadExectuable_FileType;
case 6: return Mach_O_DynamicallyLinkedSharedLib_FileType;
case 7: return Mach_O_DynamicLinker_FileType;
case 8: return Mach_O_Bundle_FileType;
case 9: return Mach_O_DynamicallyLinkedSharedLibStub_FileType;
}
}
break;
case 0xF0: // PowerPC Windows
case 0x83: // Alpha 32-bit
case 0x84: // Alpha 64-bit
case 0x66: // MPS R4000 Windows
case 0x50: // mc68K
case 0x4c: // 80386 Windows
if (magic[1] == 0x01)
return COFF_FileType;
case 0x90: // PA-RISC Windows
case 0x68: // mc68K Windows
if (magic[1] == 0x02)
return COFF_FileType;
break;
default:
break;
}
return Unknown_FileType;
}
bool
Path::isArchive() const {
if (canRead())
return hasMagicNumber("!<arch>\012");
return false;
}
bool
Path::isDynamicLibrary() const {
if (canRead()) {
std::string Magic;
if (getMagicNumber(Magic, 64))
switch (IdentifyFileType(Magic.c_str(), Magic.length())) {
default: return false;
case Mach_O_FixedVirtualMemorySharedLib_FileType:
case Mach_O_DynamicallyLinkedSharedLib_FileType:
case Mach_O_DynamicallyLinkedSharedLibStub_FileType:
case ELF_SharedObject_FileType:
case COFF_FileType: return true;
}
}
return false;
}
Path
Path::FindLibrary(std::string& name) {
std::vector<sys::Path> LibPaths;
GetSystemLibraryPaths(LibPaths);
for (unsigned i = 0; i < LibPaths.size(); ++i) {
sys::Path FullPath(LibPaths[i]);
FullPath.appendComponent("lib" + name + LTDL_SHLIB_EXT);
if (FullPath.isDynamicLibrary())
return FullPath;
FullPath.eraseSuffix();
FullPath.appendSuffix("a");
if (FullPath.isArchive())
return FullPath;
}
return sys::Path();
}
std::string Path::GetDLLSuffix() {
return LTDL_SHLIB_EXT;
}
bool
Path::isBitcodeFile() const {
std::string actualMagic;
if (!getMagicNumber(actualMagic, 4))
return false;
return actualMagic == "BC\xC0\xDE";
}
bool Path::hasMagicNumber(const std::string &Magic) const {
std::string actualMagic;
if (getMagicNumber(actualMagic, Magic.size()))
return Magic == actualMagic;
return false;
}
// Include the truly platform-specific parts of this class.
#if defined(LLVM_ON_UNIX)
#include "Unix/Path.inc"
#endif
#if defined(LLVM_ON_WIN32)
#include "Win32/Path.inc"
#endif
|
