clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name ObjDumper.cpp -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/source/build-llvm/tools/clang/stage2-bins -resource-dir /usr/lib/llvm-17/lib/clang/17 -D _DEBUG -D _GLIBCXX_ASSERTIONS -D _GNU_SOURCE -D _LIBCPP_ENABLE_ASSERTIONS -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I tools/llvm-readobj -I /build/source/llvm/tools/llvm-readobj -I include -I /build/source/llvm/include -D _FORTIFY_SOURCE=2 -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-17/lib/clang/17/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/build/source/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fmacro-prefix-map=/build/source/= -fcoverage-prefix-map=/build/source/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fcoverage-prefix-map=/build/source/= -source-date-epoch 1683717183 -O2 -Wno-unused-command-line-argument -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -Wno-misleading-indentation -std=c++17 -fdeprecated-macro -fdebug-compilation-dir=/build/source/build-llvm/tools/clang/stage2-bins -fdebug-prefix-map=/build/source/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fdebug-prefix-map=/build/source/= -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2023-05-10-133810-16478-1 -x c++ /build/source/llvm/tools/llvm-readobj/ObjDumper.cpp
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13 | |
14 | #include "ObjDumper.h" |
15 | #include "llvm-readobj.h" |
16 | #include "llvm/Object/Archive.h" |
17 | #include "llvm/Object/ObjectFile.h" |
18 | #include "llvm/Support/Error.h" |
19 | #include "llvm/Support/FormatVariadic.h" |
20 | #include "llvm/Support/ScopedPrinter.h" |
21 | #include "llvm/Support/raw_ostream.h" |
22 | #include <map> |
23 | |
24 | namespace llvm { |
25 | |
26 | static inline Error createError(const Twine &Msg) { |
27 | return createStringError(object::object_error::parse_failed, Msg); |
28 | } |
29 | |
30 | ObjDumper::ObjDumper(ScopedPrinter &Writer, StringRef ObjName) : W(Writer) { |
31 | |
32 | |
33 | WarningHandler = [=](const Twine &Msg) { |
34 | if (Warnings.insert(Msg.str()).second) |
35 | reportWarning(createError(Msg), ObjName); |
36 | return Error::success(); |
37 | }; |
38 | } |
39 | |
40 | ObjDumper::~ObjDumper() {} |
41 | |
42 | void ObjDumper::reportUniqueWarning(Error Err) const { |
43 | reportUniqueWarning(toString(std::move(Err))); |
44 | } |
45 | |
46 | void ObjDumper::reportUniqueWarning(const Twine &Msg) const { |
47 | cantFail(WarningHandler(Msg), |
48 | "WarningHandler should always return ErrorSuccess"); |
49 | } |
50 | |
51 | static void printAsPrintable(raw_ostream &W, const uint8_t *Start, size_t Len) { |
52 | for (size_t i = 0; i < Len; i++) |
53 | W << (isPrint(Start[i]) ? static_cast<char>(Start[i]) : '.'); |
54 | } |
55 | |
56 | void ObjDumper::printAsStringList(StringRef StringContent, |
57 | size_t StringDataOffset) { |
58 | size_t StrSize = StringContent.size(); |
59 | if (StrSize == 0) |
60 | return; |
61 | if (StrSize < StringDataOffset) { |
62 | reportUniqueWarning("offset (0x" + Twine::utohexstr(StringDataOffset) + |
63 | ") is past the end of the contents (size 0x" + |
64 | Twine::utohexstr(StrSize) + ")"); |
65 | return; |
66 | } |
67 | |
68 | const uint8_t *StrContent = StringContent.bytes_begin(); |
69 | |
70 | |
71 | |
72 | const uint8_t *CurrentWord = StrContent + StringDataOffset; |
73 | const uint8_t *StrEnd = StringContent.bytes_end(); |
74 | |
75 | while (CurrentWord <= StrEnd) { |
76 | size_t WordSize = strnlen(reinterpret_cast<const char *>(CurrentWord), |
77 | StrEnd - CurrentWord); |
78 | if (!WordSize) { |
79 | CurrentWord++; |
80 | continue; |
81 | } |
82 | W.startLine() << format("[%6tx] ", CurrentWord - StrContent); |
83 | printAsPrintable(W.startLine(), CurrentWord, WordSize); |
84 | W.startLine() << '\n'; |
85 | CurrentWord += WordSize + 1; |
86 | } |
87 | } |
88 | |
89 | void ObjDumper::printFileSummary(StringRef FileStr, object::ObjectFile &Obj, |
90 | ArrayRef<std::string> InputFilenames, |
91 | const object::Archive *A) { |
92 | W.startLine() << "\n"; |
93 | W.printString("File", FileStr); |
94 | W.printString("Format", Obj.getFileFormatName()); |
95 | W.printString("Arch", Triple::getArchTypeName(Obj.getArch())); |
96 | W.printString("AddressSize", |
97 | std::string(formatv("{0}bit", 8 * Obj.getBytesInAddress()))); |
98 | this->printLoadName(); |
99 | } |
100 | |
101 | static std::vector<object::SectionRef> |
102 | getSectionRefsByNameOrIndex(const object::ObjectFile &Obj, |
103 | ArrayRef<std::string> Sections) { |
104 | std::vector<object::SectionRef> Ret; |
105 | std::map<std::string, bool> SecNames; |
106 | std::map<unsigned, bool> SecIndices; |
107 | unsigned SecIndex; |
108 | for (StringRef Section : Sections) { |
109 | if (!Section.getAsInteger(0, SecIndex)) |
110 | SecIndices.emplace(SecIndex, false); |
111 | else |
112 | SecNames.emplace(std::string(Section), false); |
113 | } |
114 | |
115 | SecIndex = Obj.isELF() ? 0 : 1; |
116 | for (object::SectionRef SecRef : Obj.sections()) { |
117 | StringRef SecName = unwrapOrError(Obj.getFileName(), SecRef.getName()); |
118 | auto NameIt = SecNames.find(std::string(SecName)); |
119 | if (NameIt != SecNames.end()) |
120 | NameIt->second = true; |
121 | auto IndexIt = SecIndices.find(SecIndex); |
122 | if (IndexIt != SecIndices.end()) |
123 | IndexIt->second = true; |
124 | if (NameIt != SecNames.end() || IndexIt != SecIndices.end()) |
125 | Ret.push_back(SecRef); |
126 | SecIndex++; |
127 | } |
128 | |
129 | for (const std::pair<const std::string, bool> &S : SecNames) |
130 | if (!S.second) |
131 | reportWarning( |
132 | createError(formatv("could not find section '{0}'", S.first).str()), |
133 | Obj.getFileName()); |
134 | |
135 | for (std::pair<unsigned, bool> S : SecIndices) |
136 | if (!S.second) |
137 | reportWarning( |
138 | createError(formatv("could not find section {0}", S.first).str()), |
139 | Obj.getFileName()); |
140 | |
141 | return Ret; |
142 | } |
143 | |
144 | void ObjDumper::printSectionsAsString(const object::ObjectFile &Obj, |
145 | ArrayRef<std::string> Sections) { |
146 | bool First = true; |
147 | for (object::SectionRef Section : |
148 | getSectionRefsByNameOrIndex(Obj, Sections)) { |
149 | StringRef SectionName = unwrapOrError(Obj.getFileName(), Section.getName()); |
150 | |
151 | if (!First) |
152 | W.startLine() << '\n'; |
153 | First = false; |
154 | W.startLine() << "String dump of section '" << SectionName << "':\n"; |
155 | |
156 | StringRef SectionContent = |
157 | unwrapOrError(Obj.getFileName(), Section.getContents()); |
158 | printAsStringList(SectionContent); |
159 | } |
160 | } |
161 | |
162 | void ObjDumper::printSectionsAsHex(const object::ObjectFile &Obj, |
163 | ArrayRef<std::string> Sections) { |
164 | bool First = true; |
165 | for (object::SectionRef Section : |
166 | getSectionRefsByNameOrIndex(Obj, Sections)) { |
167 | StringRef SectionName = unwrapOrError(Obj.getFileName(), Section.getName()); |
168 | |
169 | if (!First) |
| |
170 | W.startLine() << '\n'; |
171 | First = false; |
172 | W.startLine() << "Hex dump of section '" << SectionName << "':\n"; |
173 | |
174 | StringRef SectionContent = |
175 | unwrapOrError(Obj.getFileName(), Section.getContents()); |
176 | const uint8_t *SecContent = SectionContent.bytes_begin(); |
177 | const uint8_t *SecEnd = SecContent + SectionContent.size(); |
178 | |
179 | for (const uint8_t *SecPtr = SecContent; SecPtr < SecEnd; SecPtr += 16) { |
| 2 | | Loop condition is true. Entering loop body | |
|
180 | const uint8_t *TmpSecPtr = SecPtr; |
181 | uint8_t i; |
182 | uint8_t k; |
| 3 | | 'k' declared without an initial value | |
|
183 | |
184 | W.startLine() << format_hex(Section.getAddress() + (SecPtr - SecContent), |
185 | 10); |
186 | W.startLine() << ' '; |
187 | for (i = 0; TmpSecPtr < SecEnd && i < 4; ++i) { |
| 4 | | Assuming 'TmpSecPtr' is >= 'SecEnd' | |
|
188 | for (k = 0; TmpSecPtr < SecEnd && k < 4; k++, TmpSecPtr++) { |
189 | uint8_t Val = *(reinterpret_cast<const uint8_t *>(TmpSecPtr)); |
190 | W.startLine() << format_hex_no_prefix(Val, 2); |
191 | } |
192 | W.startLine() << ' '; |
193 | } |
194 | |
195 | |
196 | |
197 | |
198 | |
199 | |
200 | if (i < 4) |
| |
201 | W.startLine() << format("%*c", (4 - i) * 8 + (4 - i), ' '); |
202 | if (k < 4) |
| 6 | | The left operand of '<' is a garbage value |
|
203 | W.startLine() << format("%*c", 8 - k * 2, ' '); |
204 | |
205 | TmpSecPtr = SecPtr; |
206 | for (i = 0; TmpSecPtr + i < SecEnd && i < 16; ++i) |
207 | W.startLine() << (isPrint(TmpSecPtr[i]) |
208 | ? static_cast<char>(TmpSecPtr[i]) |
209 | : '.'); |
210 | |
211 | W.startLine() << '\n'; |
212 | } |
213 | } |
214 | } |
215 | |
216 | } |