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
|
//===- tools/dsymutil/SymbolMap.cpp ---------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "SymbolMap.h"
#include "DebugMap.h"
#include "MachOUtils.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/WithColor.h"
#ifdef __APPLE__
#include <CoreFoundation/CoreFoundation.h>
#include <uuid/uuid.h>
#endif
namespace llvm {
namespace dsymutil {
StringRef SymbolMapTranslator::operator()(StringRef Input) {
if (!Input.startswith("__hidden#") && !Input.startswith("___hidden#"))
return Input;
bool MightNeedUnderscore = false;
StringRef Line = Input.drop_front(sizeof("__hidden#") - 1);
if (Line[0] == '#') {
Line = Line.drop_front();
MightNeedUnderscore = true;
}
std::size_t LineNumber = std::numeric_limits<std::size_t>::max();
Line.split('_').first.getAsInteger(10, LineNumber);
if (LineNumber >= UnobfuscatedStrings.size()) {
WithColor::warning() << "reference to a unexisting unobfuscated string "
<< Input << ": symbol map mismatch?\n"
<< Line << '\n';
return Input;
}
const std::string &Translation = UnobfuscatedStrings[LineNumber];
if (!MightNeedUnderscore || !MangleNames)
return Translation;
// Objective-C symbols for the MachO symbol table start with a \1. Please see
// `CGObjCCommonMac::GetNameForMethod` in clang.
if (Translation[0] == 1)
return StringRef(Translation).drop_front();
// We need permanent storage for the string we are about to create. Just
// append it to the vector containing translations. This should only happen
// during MachO symbol table translation, thus there should be no risk on
// exponential growth.
UnobfuscatedStrings.emplace_back("_" + Translation);
return UnobfuscatedStrings.back();
}
SymbolMapTranslator SymbolMapLoader::Load(StringRef InputFile,
const DebugMap &Map) const {
if (SymbolMap.empty())
return {};
std::string SymbolMapPath = SymbolMap;
#if __APPLE__
// Look through the UUID Map.
if (sys::fs::is_directory(SymbolMapPath) && !Map.getUUID().empty()) {
uuid_string_t UUIDString;
uuid_unparse_upper((const uint8_t *)Map.getUUID().data(), UUIDString);
SmallString<256> PlistPath(
sys::path::parent_path(sys::path::parent_path(InputFile)));
sys::path::append(PlistPath, StringRef(UUIDString).str() + ".plist");
CFStringRef plistFile = CFStringCreateWithCString(
kCFAllocatorDefault, PlistPath.c_str(), kCFStringEncodingUTF8);
CFURLRef fileURL = CFURLCreateWithFileSystemPath(
kCFAllocatorDefault, plistFile, kCFURLPOSIXPathStyle, false);
CFReadStreamRef resourceData =
CFReadStreamCreateWithFile(kCFAllocatorDefault, fileURL);
if (resourceData) {
CFReadStreamOpen(resourceData);
CFDictionaryRef plist = (CFDictionaryRef)CFPropertyListCreateWithStream(
kCFAllocatorDefault, resourceData, 0, kCFPropertyListImmutable,
nullptr, nullptr);
if (plist) {
if (CFDictionaryContainsKey(plist, CFSTR("DBGOriginalUUID"))) {
CFStringRef OldUUID = (CFStringRef)CFDictionaryGetValue(
plist, CFSTR("DBGOriginalUUID"));
StringRef UUID(CFStringGetCStringPtr(OldUUID, kCFStringEncodingUTF8));
SmallString<256> BCSymbolMapPath(SymbolMapPath);
sys::path::append(BCSymbolMapPath, UUID.str() + ".bcsymbolmap");
SymbolMapPath = BCSymbolMapPath.str();
}
CFRelease(plist);
}
CFReadStreamClose(resourceData);
CFRelease(resourceData);
}
CFRelease(fileURL);
CFRelease(plistFile);
}
#endif
if (sys::fs::is_directory(SymbolMapPath)) {
SymbolMapPath += (Twine("/") + sys::path::filename(InputFile) + "-" +
MachOUtils::getArchName(Map.getTriple().getArchName()) +
".bcsymbolmap")
.str();
}
auto ErrOrMemBuffer = MemoryBuffer::getFile(SymbolMapPath);
if (auto EC = ErrOrMemBuffer.getError()) {
WithColor::warning() << SymbolMapPath << ": " << EC.message()
<< ": not unobfuscating.\n";
return {};
}
std::vector<std::string> UnobfuscatedStrings;
auto &MemBuf = **ErrOrMemBuffer;
StringRef Data(MemBuf.getBufferStart(),
MemBuf.getBufferEnd() - MemBuf.getBufferStart());
StringRef LHS;
std::tie(LHS, Data) = Data.split('\n');
bool MangleNames = false;
// Check version string first.
if (!LHS.startswith("BCSymbolMap Version:")) {
// Version string not present, warns but try to parse it.
WithColor::warning() << SymbolMapPath
<< " is missing version string: assuming 1.0.\n";
UnobfuscatedStrings.emplace_back(LHS);
} else if (LHS.equals("BCSymbolMap Version: 1.0")) {
MangleNames = true;
} else if (LHS.equals("BCSymbolMap Version: 2.0")) {
MangleNames = false;
} else {
StringRef VersionNum;
std::tie(LHS, VersionNum) = LHS.split(':');
WithColor::warning() << SymbolMapPath
<< " has unsupported symbol map version" << VersionNum
<< ": not unobfuscating.\n";
return {};
}
while (!Data.empty()) {
std::tie(LHS, Data) = Data.split('\n');
UnobfuscatedStrings.emplace_back(LHS);
}
return SymbolMapTranslator(std::move(UnobfuscatedStrings), MangleNames);
}
} // namespace dsymutil
} // namespace llvm
|
GitWeb