clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name MachOUniversal.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -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 -mthread-model posix -mframe-pointer=none -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-11/lib/clang/11.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/lib/Object -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Object -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/include -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-11/lib/clang/11.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/lib/Object -fdebug-prefix-map=/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2020-03-09-184146-41876-1 -x c++ /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Object/MachOUniversal.cpp
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11 | |
12 | |
13 | #include "llvm/Object/MachOUniversal.h" |
14 | #include "llvm/Object/Archive.h" |
15 | #include "llvm/Object/MachO.h" |
16 | #include "llvm/Object/ObjectFile.h" |
17 | #include "llvm/Support/Casting.h" |
18 | #include "llvm/Support/Host.h" |
19 | #include "llvm/Support/MemoryBuffer.h" |
20 | |
21 | using namespace llvm; |
22 | using namespace object; |
23 | |
24 | static Error |
25 | malformedError(Twine Msg) { |
26 | std::string StringMsg = "truncated or malformed fat file (" + Msg.str() + ")"; |
27 | return make_error<GenericBinaryError>(std::move(StringMsg), |
28 | object_error::parse_failed); |
29 | } |
30 | |
31 | template<typename T> |
32 | static T getUniversalBinaryStruct(const char *Ptr) { |
33 | T Res; |
34 | memcpy(&Res, Ptr, sizeof(T)); |
35 | |
36 | if (sys::IsLittleEndianHost) |
37 | swapStruct(Res); |
38 | return Res; |
39 | } |
40 | |
41 | MachOUniversalBinary::ObjectForArch::ObjectForArch( |
42 | const MachOUniversalBinary *Parent, uint32_t Index) |
43 | : Parent(Parent), Index(Index) { |
44 | |
45 | if (!Parent || Index >= Parent->getNumberOfObjects()) { |
46 | clear(); |
47 | } else { |
48 | |
49 | StringRef ParentData = Parent->getData(); |
50 | if (Parent->getMagic() == MachO::FAT_MAGIC) { |
51 | const char *HeaderPos = ParentData.begin() + sizeof(MachO::fat_header) + |
52 | Index * sizeof(MachO::fat_arch); |
53 | Header = getUniversalBinaryStruct<MachO::fat_arch>(HeaderPos); |
54 | } else { |
55 | const char *HeaderPos = ParentData.begin() + sizeof(MachO::fat_header) + |
56 | Index * sizeof(MachO::fat_arch_64); |
57 | Header64 = getUniversalBinaryStruct<MachO::fat_arch_64>(HeaderPos); |
58 | } |
59 | } |
60 | } |
61 | |
62 | Expected<std::unique_ptr<MachOObjectFile>> |
63 | MachOUniversalBinary::ObjectForArch::getAsObjectFile() const { |
64 | if (!Parent) |
65 | report_fatal_error("MachOUniversalBinary::ObjectForArch::getAsObjectFile() " |
66 | "called when Parent is a nullptr"); |
67 | |
68 | StringRef ParentData = Parent->getData(); |
69 | StringRef ObjectData; |
70 | uint32_t cputype; |
71 | if (Parent->getMagic() == MachO::FAT_MAGIC) { |
72 | ObjectData = ParentData.substr(Header.offset, Header.size); |
73 | cputype = Header.cputype; |
74 | } else { |
75 | ObjectData = ParentData.substr(Header64.offset, Header64.size); |
76 | cputype = Header64.cputype; |
77 | } |
78 | StringRef ObjectName = Parent->getFileName(); |
79 | MemoryBufferRef ObjBuffer(ObjectData, ObjectName); |
80 | return ObjectFile::createMachOObjectFile(ObjBuffer, cputype, Index); |
81 | } |
82 | |
83 | Expected<std::unique_ptr<Archive>> |
84 | MachOUniversalBinary::ObjectForArch::getAsArchive() const { |
85 | if (!Parent) |
86 | report_fatal_error("MachOUniversalBinary::ObjectForArch::getAsArchive() " |
87 | "called when Parent is a nullptr"); |
88 | |
89 | StringRef ParentData = Parent->getData(); |
90 | StringRef ObjectData; |
91 | if (Parent->getMagic() == MachO::FAT_MAGIC) |
92 | ObjectData = ParentData.substr(Header.offset, Header.size); |
93 | else |
94 | ObjectData = ParentData.substr(Header64.offset, Header64.size); |
95 | StringRef ObjectName = Parent->getFileName(); |
96 | MemoryBufferRef ObjBuffer(ObjectData, ObjectName); |
97 | return Archive::create(ObjBuffer); |
98 | } |
99 | |
100 | void MachOUniversalBinary::anchor() { } |
101 | |
102 | Expected<std::unique_ptr<MachOUniversalBinary>> |
103 | MachOUniversalBinary::create(MemoryBufferRef Source) { |
104 | Error Err = Error::success(); |
105 | std::unique_ptr<MachOUniversalBinary> Ret( |
106 | new MachOUniversalBinary(Source, Err)); |
107 | if (Err) |
108 | return std::move(Err); |
109 | return std::move(Ret); |
110 | } |
111 | |
112 | MachOUniversalBinary::MachOUniversalBinary(MemoryBufferRef Source, Error &Err) |
113 | : Binary(Binary::ID_MachOUniversalBinary, Source), Magic(0), |
114 | NumberOfObjects(0) { |
115 | ErrorAsOutParameter ErrAsOutParam(&Err); |
116 | if (Data.getBufferSize() < sizeof(MachO::fat_header)) { |
117 | Err = make_error<GenericBinaryError>("File too small to be a Mach-O " |
118 | "universal file", |
119 | object_error::invalid_file_type); |
120 | return; |
121 | } |
122 | |
123 | StringRef Buf = getData(); |
124 | MachO::fat_header H = |
125 | getUniversalBinaryStruct<MachO::fat_header>(Buf.begin()); |
126 | Magic = H.magic; |
127 | NumberOfObjects = H.nfat_arch; |
128 | if (NumberOfObjects == 0) { |
129 | Err = malformedError("contains zero architecture types"); |
130 | return; |
131 | } |
132 | uint32_t MinSize = sizeof(MachO::fat_header); |
133 | if (Magic == MachO::FAT_MAGIC) |
134 | MinSize += sizeof(MachO::fat_arch) * NumberOfObjects; |
135 | else if (Magic == MachO::FAT_MAGIC_64) |
136 | MinSize += sizeof(MachO::fat_arch_64) * NumberOfObjects; |
137 | else { |
138 | Err = malformedError("bad magic number"); |
139 | return; |
140 | } |
141 | if (Buf.size() < MinSize) { |
142 | Err = malformedError("fat_arch" + |
143 | Twine(Magic == MachO::FAT_MAGIC ? "" : "_64") + |
144 | " structs would extend past the end of the file"); |
145 | return; |
146 | } |
147 | for (uint32_t i = 0; i < NumberOfObjects; i++) { |
148 | ObjectForArch A(this, i); |
149 | uint64_t bigSize = A.getOffset(); |
150 | bigSize += A.getSize(); |
151 | if (bigSize > Buf.size()) { |
152 | Err = malformedError("offset plus size of cputype (" + |
153 | Twine(A.getCPUType()) + ") cpusubtype (" + |
154 | Twine(A.getCPUSubType() & ~MachO::CPU_SUBTYPE_MASK) + |
155 | ") extends past the end of the file"); |
156 | return; |
157 | } |
158 | |
159 | if (A.getAlign() > MaxSectionAlignment) { |
160 | Err = malformedError("align (2^" + Twine(A.getAlign()) + |
161 | ") too large for cputype (" + Twine(A.getCPUType()) + |
162 | ") cpusubtype (" + |
163 | Twine(A.getCPUSubType() & ~MachO::CPU_SUBTYPE_MASK) + |
164 | ") (maximum 2^" + Twine(MaxSectionAlignment) + ")"); |
165 | return; |
166 | } |
167 | if(A.getOffset() % (1ull << A.getAlign()) != 0){ |
168 | Err = malformedError("offset: " + Twine(A.getOffset()) + |
169 | " for cputype (" + Twine(A.getCPUType()) + ") cpusubtype (" + |
170 | Twine(A.getCPUSubType() & ~MachO::CPU_SUBTYPE_MASK) + |
171 | ") not aligned on it's alignment (2^" + Twine(A.getAlign()) + ")"); |
172 | return; |
173 | } |
174 | if (A.getOffset() < MinSize) { |
175 | Err = malformedError("cputype (" + Twine(A.getCPUType()) + ") " |
176 | "cpusubtype (" + Twine(A.getCPUSubType() & ~MachO::CPU_SUBTYPE_MASK) + |
177 | ") offset " + Twine(A.getOffset()) + " overlaps universal headers"); |
178 | return; |
179 | } |
180 | } |
181 | for (uint32_t i = 0; i < NumberOfObjects; i++) { |
182 | ObjectForArch A(this, i); |
183 | for (uint32_t j = i + 1; j < NumberOfObjects; j++) { |
184 | ObjectForArch B(this, j); |
185 | if (A.getCPUType() == B.getCPUType() && |
186 | (A.getCPUSubType() & ~MachO::CPU_SUBTYPE_MASK) == |
187 | (B.getCPUSubType() & ~MachO::CPU_SUBTYPE_MASK)) { |
188 | Err = malformedError("contains two of the same architecture (cputype " |
189 | "(" + Twine(A.getCPUType()) + ") cpusubtype (" + |
190 | Twine(A.getCPUSubType() & ~MachO::CPU_SUBTYPE_MASK) + "))"); |
191 | return; |
192 | } |
193 | if ((A.getOffset() >= B.getOffset() && |
194 | A.getOffset() < B.getOffset() + B.getSize()) || |
195 | (A.getOffset() + A.getSize() > B.getOffset() && |
196 | A.getOffset() + A.getSize() < B.getOffset() + B.getSize()) || |
197 | (A.getOffset() <= B.getOffset() && |
198 | A.getOffset() + A.getSize() >= B.getOffset() + B.getSize())) { |
199 | Err = malformedError("cputype (" + Twine(A.getCPUType()) + ") " |
200 | "cpusubtype (" + Twine(A.getCPUSubType() & ~MachO::CPU_SUBTYPE_MASK) + |
201 | ") at offset " + Twine(A.getOffset()) + " with a size of " + |
202 | Twine(A.getSize()) + ", overlaps cputype (" + Twine(B.getCPUType()) + |
203 | ") cpusubtype (" + Twine(B.getCPUSubType() & ~MachO::CPU_SUBTYPE_MASK) |
204 | + ") at offset " + Twine(B.getOffset()) + " with a size of " |
205 | + Twine(B.getSize())); |
206 | return; |
207 | } |
208 | } |
209 | } |
210 | Err = Error::success(); |
211 | } |
212 | |
213 | Expected<MachOUniversalBinary::ObjectForArch> |
214 | MachOUniversalBinary::getObjectForArch(StringRef ArchName) const { |
215 | if (Triple(ArchName).getArch() == Triple::ArchType::UnknownArch) |
| 2 | | Assuming the condition is false | |
|
| |
216 | return make_error<GenericBinaryError>("Unknown architecture " |
217 | "named: " + |
218 | ArchName, |
219 | object_error::arch_not_found); |
220 | for (const auto &Obj : objects()) |
| 6 | | Calling 'object_iterator::operator++' | |
|
| 8 | | Returning from 'object_iterator::operator++' | |
|
221 | if (Obj.getArchFlagName() == ArchName) |
| 4 | | Assuming the condition is false | |
|
| |
| 9 | | Calling 'ObjectForArch::getArchFlagName' | |
|
222 | return Obj; |
223 | return make_error<GenericBinaryError>("fat file does not " |
224 | "contain " + |
225 | ArchName, |
226 | object_error::arch_not_found); |
227 | } |
228 | |
229 | Expected<std::unique_ptr<MachOObjectFile>> |
230 | MachOUniversalBinary::getMachOObjectForArch(StringRef ArchName) const { |
231 | Expected<ObjectForArch> O = getObjectForArch(ArchName); |
232 | if (!O) |
233 | return O.takeError(); |
234 | return O->getAsObjectFile(); |
235 | } |
236 | |
237 | Expected<std::unique_ptr<Archive>> |
238 | MachOUniversalBinary::getArchiveForArch(StringRef ArchName) const { |
239 | Expected<ObjectForArch> O = getObjectForArch(ArchName); |
| 1 | Calling 'MachOUniversalBinary::getObjectForArch' | |
|
240 | if (!O) |
241 | return O.takeError(); |
242 | return O->getAsArchive(); |
243 | } |
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11 | |
12 | |
13 | #ifndef LLVM_OBJECT_MACHOUNIVERSAL_H |
14 | #define LLVM_OBJECT_MACHOUNIVERSAL_H |
15 | |
16 | #include "llvm/ADT/Triple.h" |
17 | #include "llvm/ADT/iterator_range.h" |
18 | #include "llvm/BinaryFormat/MachO.h" |
19 | #include "llvm/Object/Archive.h" |
20 | #include "llvm/Object/Binary.h" |
21 | #include "llvm/Object/MachO.h" |
22 | |
23 | namespace llvm { |
24 | class StringRef; |
25 | |
26 | namespace object { |
27 | |
28 | class MachOUniversalBinary : public Binary { |
29 | virtual void anchor(); |
30 | |
31 | uint32_t Magic; |
32 | uint32_t NumberOfObjects; |
33 | public: |
34 | static constexpr uint32_t MaxSectionAlignment = 15; |
35 | |
36 | class ObjectForArch { |
37 | const MachOUniversalBinary *Parent; |
38 | |
39 | uint32_t Index; |
40 | |
41 | MachO::fat_arch Header; |
42 | MachO::fat_arch_64 Header64; |
43 | |
44 | public: |
45 | ObjectForArch(const MachOUniversalBinary *Parent, uint32_t Index); |
46 | |
47 | void clear() { |
48 | Parent = nullptr; |
49 | Index = 0; |
50 | } |
51 | |
52 | bool operator==(const ObjectForArch &Other) const { |
53 | return (Parent == Other.Parent) && (Index == Other.Index); |
54 | } |
55 | |
56 | ObjectForArch getNext() const { return ObjectForArch(Parent, Index + 1); } |
57 | uint32_t getCPUType() const { |
58 | if (Parent->getMagic() == MachO::FAT_MAGIC) |
59 | return Header.cputype; |
60 | else |
61 | return Header64.cputype; |
62 | } |
63 | uint32_t getCPUSubType() const { |
64 | if (Parent->getMagic() == MachO::FAT_MAGIC) |
65 | return Header.cpusubtype; |
66 | else |
67 | return Header64.cpusubtype; |
68 | } |
69 | uint64_t getOffset() const { |
70 | if (Parent->getMagic() == MachO::FAT_MAGIC) |
71 | return Header.offset; |
72 | else |
73 | return Header64.offset; |
74 | } |
75 | uint64_t getSize() const { |
76 | if (Parent->getMagic() == MachO::FAT_MAGIC) |
77 | return Header.size; |
78 | else |
79 | return Header64.size; |
80 | } |
81 | uint32_t getAlign() const { |
82 | if (Parent->getMagic() == MachO::FAT_MAGIC) |
83 | return Header.align; |
84 | else |
85 | return Header64.align; |
86 | } |
87 | uint32_t getReserved() const { |
88 | if (Parent->getMagic() == MachO::FAT_MAGIC) |
89 | return 0; |
90 | else |
91 | return Header64.reserved; |
92 | } |
93 | std::string getArchFlagName() const { |
94 | const char *McpuDefault, *ArchFlag; |
95 | if (Parent->getMagic() == MachO::FAT_MAGIC) { |
| 10 | | Called C++ object pointer is null |
|
96 | Triple T = |
97 | MachOObjectFile::getArchTriple(Header.cputype, Header.cpusubtype, |
98 | &McpuDefault, &ArchFlag); |
99 | } else { |
100 | Triple T = |
101 | MachOObjectFile::getArchTriple(Header64.cputype, |
102 | Header64.cpusubtype, |
103 | &McpuDefault, &ArchFlag); |
104 | } |
105 | if (ArchFlag) { |
106 | std::string ArchFlagName(ArchFlag); |
107 | return ArchFlagName; |
108 | } else { |
109 | std::string ArchFlagName(""); |
110 | return ArchFlagName; |
111 | } |
112 | } |
113 | |
114 | Expected<std::unique_ptr<MachOObjectFile>> getAsObjectFile() const; |
115 | |
116 | Expected<std::unique_ptr<Archive>> getAsArchive() const; |
117 | }; |
118 | |
119 | class object_iterator { |
120 | ObjectForArch Obj; |
121 | public: |
122 | object_iterator(const ObjectForArch &Obj) : Obj(Obj) {} |
123 | const ObjectForArch *operator->() const { return &Obj; } |
124 | const ObjectForArch &operator*() const { return Obj; } |
125 | |
126 | bool operator==(const object_iterator &Other) const { |
127 | return Obj == Other.Obj; |
128 | } |
129 | bool operator!=(const object_iterator &Other) const { |
130 | return !(*this == Other); |
131 | } |
132 | |
133 | object_iterator& operator++() { |
134 | Obj = Obj.getNext(); |
| 7 | | Null pointer value stored to '__begin1.Obj.Parent' | |
|
135 | return *this; |
136 | } |
137 | }; |
138 | |
139 | MachOUniversalBinary(MemoryBufferRef Souce, Error &Err); |
140 | static Expected<std::unique_ptr<MachOUniversalBinary>> |
141 | create(MemoryBufferRef Source); |
142 | |
143 | object_iterator begin_objects() const { |
144 | return ObjectForArch(this, 0); |
145 | } |
146 | object_iterator end_objects() const { |
147 | return ObjectForArch(nullptr, 0); |
148 | } |
149 | |
150 | iterator_range<object_iterator> objects() const { |
151 | return make_range(begin_objects(), end_objects()); |
152 | } |
153 | |
154 | uint32_t getMagic() const { return Magic; } |
155 | uint32_t getNumberOfObjects() const { return NumberOfObjects; } |
156 | |
157 | |
158 | static bool classof(Binary const *V) { |
159 | return V->isMachOUniversalBinary(); |
160 | } |
161 | |
162 | Expected<ObjectForArch> |
163 | getObjectForArch(StringRef ArchName) const; |
164 | |
165 | Expected<std::unique_ptr<MachOObjectFile>> |
166 | getMachOObjectForArch(StringRef ArchName) const; |
167 | |
168 | Expected<std::unique_ptr<Archive>> |
169 | getArchiveForArch(StringRef ArchName) const; |
170 | }; |
171 | |
172 | } |
173 | } |
174 | |
175 | #endif |