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
|
//===-- FuzzerCLI.cpp -----------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/FuzzMutate/FuzzerCLI.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Bitcode/BitcodeReader.h"
#include "llvm/Bitcode/BitcodeWriter.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
void llvm::parseFuzzerCLOpts(int ArgC, char *ArgV[]) {
std::vector<const char *> CLArgs;
CLArgs.push_back(ArgV[0]);
int I = 1;
while (I < ArgC)
if (StringRef(ArgV[I++]).equals("-ignore_remaining_args=1"))
break;
while (I < ArgC)
CLArgs.push_back(ArgV[I++]);
cl::ParseCommandLineOptions(CLArgs.size(), CLArgs.data());
}
void llvm::handleExecNameEncodedBEOpts(StringRef ExecName) {
std::vector<std::string> Args{ExecName};
auto NameAndArgs = ExecName.split("--");
if (NameAndArgs.second.empty())
return;
SmallVector<StringRef, 4> Opts;
NameAndArgs.second.split(Opts, '-');
for (StringRef Opt : Opts) {
if (Opt.equals("gisel")) {
Args.push_back("-global-isel");
// For now we default GlobalISel to -O0
Args.push_back("-O0");
} else if (Opt.startswith("O")) {
Args.push_back("-" + Opt.str());
} else if (Triple(Opt).getArch()) {
Args.push_back("-mtriple=" + Opt.str());
} else {
errs() << ExecName << ": Unknown option: " << Opt << ".\n";
exit(1);
}
}
errs() << NameAndArgs.first << ": Injected args:";
for (int I = 1, E = Args.size(); I < E; ++I)
errs() << " " << Args[I];
errs() << "\n";
std::vector<const char *> CLArgs;
CLArgs.reserve(Args.size());
for (std::string &S : Args)
CLArgs.push_back(S.c_str());
cl::ParseCommandLineOptions(CLArgs.size(), CLArgs.data());
}
void llvm::handleExecNameEncodedOptimizerOpts(StringRef ExecName) {
// TODO: Refactor parts common with the 'handleExecNameEncodedBEOpts'
std::vector<std::string> Args{ExecName};
auto NameAndArgs = ExecName.split("--");
if (NameAndArgs.second.empty())
return;
SmallVector<StringRef, 4> Opts;
NameAndArgs.second.split(Opts, '-');
for (StringRef Opt : Opts) {
if (Opt.startswith("instcombine")) {
Args.push_back("-passes=instcombine");
} else if (Triple(Opt).getArch()) {
Args.push_back("-mtriple=" + Opt.str());
} else {
errs() << ExecName << ": Unknown option: " << Opt << ".\n";
exit(1);
}
}
errs() << NameAndArgs.first << ": Injected args:";
for (int I = 1, E = Args.size(); I < E; ++I)
errs() << " " << Args[I];
errs() << "\n";
std::vector<const char *> CLArgs;
CLArgs.reserve(Args.size());
for (std::string &S : Args)
CLArgs.push_back(S.c_str());
cl::ParseCommandLineOptions(CLArgs.size(), CLArgs.data());
}
int llvm::runFuzzerOnInputs(int ArgC, char *ArgV[], FuzzerTestFun TestOne,
FuzzerInitFun Init) {
errs() << "*** This tool was not linked to libFuzzer.\n"
<< "*** No fuzzing will be performed.\n";
if (int RC = Init(&ArgC, &ArgV)) {
errs() << "Initialization failed\n";
return RC;
}
for (int I = 1; I < ArgC; ++I) {
StringRef Arg(ArgV[I]);
if (Arg.startswith("-")) {
if (Arg.equals("-ignore_remaining_args=1"))
break;
continue;
}
auto BufOrErr = MemoryBuffer::getFile(Arg, /*FileSize-*/ -1,
/*RequiresNullTerminator=*/false);
if (std::error_code EC = BufOrErr.getError()) {
errs() << "Error reading file: " << Arg << ": " << EC.message() << "\n";
return 1;
}
std::unique_ptr<MemoryBuffer> Buf = std::move(BufOrErr.get());
errs() << "Running: " << Arg << " (" << Buf->getBufferSize() << " bytes)\n";
TestOne(reinterpret_cast<const uint8_t *>(Buf->getBufferStart()),
Buf->getBufferSize());
}
return 0;
}
std::unique_ptr<Module> llvm::parseModule(
const uint8_t *Data, size_t Size, LLVMContext &Context) {
if (Size <= 1)
// We get bogus data given an empty corpus - just create a new module.
return llvm::make_unique<Module>("M", Context);
auto Buffer = MemoryBuffer::getMemBuffer(
StringRef(reinterpret_cast<const char *>(Data), Size), "Fuzzer input",
/*RequiresNullTerminator=*/false);
SMDiagnostic Err;
auto M = parseBitcodeFile(Buffer->getMemBufferRef(), Context);
if (Error E = M.takeError()) {
errs() << toString(std::move(E)) << "\n";
return nullptr;
}
return std::move(M.get());
}
size_t llvm::writeModule(const Module &M, uint8_t *Dest, size_t MaxSize) {
std::string Buf;
{
raw_string_ostream OS(Buf);
WriteBitcodeToFile(&M, OS);
}
if (Buf.size() > MaxSize)
return 0;
memcpy(Dest, Buf.data(), Buf.size());
return Buf.size();
}
|
