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-eagerly-assume -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 -mrelocation-model pic -pic-level 2 -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-7/lib/clang/7.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-7~svn329677/build-llvm/lib/Object -I /build/llvm-toolchain-snapshot-7~svn329677/lib/Object -I /build/llvm-toolchain-snapshot-7~svn329677/build-llvm/include -I /build/llvm-toolchain-snapshot-7~svn329677/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/x86_64-linux-gnu/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/x86_64-linux-gnu/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0/backward -internal-isystem /usr/include/clang/7.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-7/lib/clang/7.0.0/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++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-7~svn329677/build-llvm/lib/Object -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-checker optin.performance.Padding -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-04-11-031539-24776-1 -x c++ /build/llvm-toolchain-snapshot-7~svn329677/lib/Object/MachOUniversal.cpp
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13 | |
14 | #include "llvm/Object/MachOUniversal.h" |
15 | #include "llvm/Object/Archive.h" |
16 | #include "llvm/Object/MachO.h" |
17 | #include "llvm/Object/ObjectFile.h" |
18 | #include "llvm/Support/Casting.h" |
19 | #include "llvm/Support/Host.h" |
20 | #include "llvm/Support/MemoryBuffer.h" |
21 | |
22 | using namespace llvm; |
23 | using namespace object; |
24 | |
25 | static Error |
26 | malformedError(Twine Msg) { |
27 | std::string StringMsg = "truncated or malformed fat file (" + Msg.str() + ")"; |
28 | return make_error<GenericBinaryError>(std::move(StringMsg), |
29 | object_error::parse_failed); |
30 | } |
31 | |
32 | template<typename T> |
33 | static T getUniversalBinaryStruct(const char *Ptr) { |
34 | T Res; |
35 | memcpy(&Res, Ptr, sizeof(T)); |
36 | |
37 | if (sys::IsLittleEndianHost) |
38 | swapStruct(Res); |
39 | return Res; |
40 | } |
41 | |
42 | MachOUniversalBinary::ObjectForArch::ObjectForArch( |
43 | const MachOUniversalBinary *Parent, uint32_t Index) |
44 | : Parent(Parent), Index(Index) { |
45 | |
46 | if (!Parent || Index >= Parent->getNumberOfObjects()) { |
| |
47 | clear(); |
48 | } else { |
49 | |
50 | StringRef ParentData = Parent->getData(); |
51 | if (Parent->getMagic() == MachO::FAT_MAGIC) { |
| 20 | | Assuming the condition is false | |
|
| |
52 | const char *HeaderPos = ParentData.begin() + sizeof(MachO::fat_header) + |
53 | Index * sizeof(MachO::fat_arch); |
54 | Header = getUniversalBinaryStruct<MachO::fat_arch>(HeaderPos); |
55 | } else { |
56 | const char *HeaderPos = ParentData.begin() + sizeof(MachO::fat_header) + |
57 | Index * sizeof(MachO::fat_arch_64); |
58 | Header64 = getUniversalBinaryStruct<MachO::fat_arch_64>(HeaderPos); |
59 | } |
60 | } |
61 | } |
| 22 | | Returning without writing to 'this->Header.cputype' | |
|
62 | |
63 | Expected<std::unique_ptr<MachOObjectFile>> |
64 | MachOUniversalBinary::ObjectForArch::getAsObjectFile() const { |
65 | if (!Parent) |
66 | report_fatal_error("MachOUniversalBinary::ObjectForArch::getAsObjectFile() " |
67 | "called when Parent is a nullptr"); |
68 | |
69 | StringRef ParentData = Parent->getData(); |
70 | StringRef ObjectData; |
71 | uint32_t cputype; |
72 | if (Parent->getMagic() == MachO::FAT_MAGIC) { |
73 | ObjectData = ParentData.substr(Header.offset, Header.size); |
74 | cputype = Header.cputype; |
75 | } else { |
76 | ObjectData = ParentData.substr(Header64.offset, Header64.size); |
77 | cputype = Header64.cputype; |
78 | } |
79 | StringRef ObjectName = Parent->getFileName(); |
80 | MemoryBufferRef ObjBuffer(ObjectData, ObjectName); |
81 | return ObjectFile::createMachOObjectFile(ObjBuffer, cputype, Index); |
82 | } |
83 | |
84 | Expected<std::unique_ptr<Archive>> |
85 | MachOUniversalBinary::ObjectForArch::getAsArchive() const { |
86 | if (!Parent) |
87 | report_fatal_error("MachOUniversalBinary::ObjectForArch::getAsArchive() " |
88 | "called when Parent is a nullptr"); |
89 | |
90 | StringRef ParentData = Parent->getData(); |
91 | StringRef ObjectData; |
92 | if (Parent->getMagic() == MachO::FAT_MAGIC) |
93 | ObjectData = ParentData.substr(Header.offset, Header.size); |
94 | else |
95 | ObjectData = ParentData.substr(Header64.offset, Header64.size); |
96 | StringRef ObjectName = Parent->getFileName(); |
97 | MemoryBufferRef ObjBuffer(ObjectData, ObjectName); |
98 | return Archive::create(ObjBuffer); |
99 | } |
100 | |
101 | void MachOUniversalBinary::anchor() { } |
102 | |
103 | Expected<std::unique_ptr<MachOUniversalBinary>> |
104 | MachOUniversalBinary::create(MemoryBufferRef Source) { |
105 | Error Err = Error::success(); |
106 | std::unique_ptr<MachOUniversalBinary> Ret( |
107 | new MachOUniversalBinary(Source, Err)); |
108 | if (Err) |
109 | return std::move(Err); |
110 | return std::move(Ret); |
111 | } |
112 | |
113 | MachOUniversalBinary::MachOUniversalBinary(MemoryBufferRef Source, Error &Err) |
114 | : Binary(Binary::ID_MachOUniversalBinary, Source), Magic(0), |
115 | NumberOfObjects(0) { |
116 | ErrorAsOutParameter ErrAsOutParam(&Err); |
117 | if (Data.getBufferSize() < sizeof(MachO::fat_header)) { |
| 1 | Assuming the condition is false | |
|
| |
118 | Err = make_error<GenericBinaryError>("File too small to be a Mach-O " |
119 | "universal file", |
120 | object_error::invalid_file_type); |
121 | return; |
122 | } |
123 | |
124 | StringRef Buf = getData(); |
125 | MachO::fat_header H = |
126 | getUniversalBinaryStruct<MachO::fat_header>(Buf.begin()); |
127 | Magic = H.magic; |
128 | NumberOfObjects = H.nfat_arch; |
129 | if (NumberOfObjects == 0) { |
| 3 | | Assuming the condition is false | |
|
| |
130 | Err = malformedError("contains zero architecture types"); |
131 | return; |
132 | } |
133 | uint32_t MinSize = sizeof(MachO::fat_header); |
134 | if (Magic == MachO::FAT_MAGIC) |
| 5 | | Assuming the condition is true | |
|
| |
135 | MinSize += sizeof(MachO::fat_arch) * NumberOfObjects; |
136 | else if (Magic == MachO::FAT_MAGIC_64) |
137 | MinSize += sizeof(MachO::fat_arch_64) * NumberOfObjects; |
138 | else { |
139 | Err = malformedError("bad magic number"); |
140 | return; |
141 | } |
142 | if (Buf.size() < MinSize) { |
| |
143 | Err = malformedError("fat_arch" + |
144 | Twine(Magic == MachO::FAT_MAGIC ? "" : "_64") + |
145 | " structs would extend past the end of the file"); |
146 | return; |
147 | } |
148 | for (uint32_t i = 0; i < NumberOfObjects; i++) { |
| 8 | | Loop condition is true. Entering loop body | |
|
| 14 | | Assuming the condition is false | |
|
| 15 | | Loop condition is false. Execution continues on line 181 | |
|
149 | ObjectForArch A(this, i); |
150 | uint64_t bigSize = A.getOffset(); |
151 | bigSize += A.getSize(); |
152 | if (bigSize > Buf.size()) { |
| |
153 | Err = malformedError("offset plus size of cputype (" + |
154 | Twine(A.getCPUType()) + ") cpusubtype (" + |
155 | Twine(A.getCPUSubType() & ~MachO::CPU_SUBTYPE_MASK) + |
156 | ") extends past the end of the file"); |
157 | return; |
158 | } |
159 | #define MAXSECTALIGN15 15 /* 2**15 or 0x8000 */ |
160 | if (A.getAlign() > MAXSECTALIGN15) { |
| 10 | | Assuming the condition is false | |
|
| |
161 | Err = malformedError("align (2^" + Twine(A.getAlign()) + ") too large " |
162 | "for cputype (" + Twine(A.getCPUType()) + ") cpusubtype (" + |
163 | Twine(A.getCPUSubType() & ~MachO::CPU_SUBTYPE_MASK) + |
164 | ") (maximum 2^" + Twine(MAXSECTALIGN15) + ")"); |
165 | return; |
166 | } |
167 | if(A.getOffset() % (1 << 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++) { |
| 16 | | Assuming the condition is true | |
|
| 17 | | Loop condition is true. Entering loop body | |
|
182 | ObjectForArch A(this, i); |
| 18 | | Calling constructor for 'ObjectForArch' | |
|
| 23 | | Returning from constructor for 'ObjectForArch' | |
|
183 | for (uint32_t j = i + 1; j < NumberOfObjects; j++) { |
| 24 | | Assuming the condition is true | |
|
| 25 | | Loop condition is true. Entering loop body | |
|
184 | ObjectForArch B(this, j); |
185 | if (A.getCPUType() == B.getCPUType() && |
| 26 | | Calling 'ObjectForArch::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<std::unique_ptr<MachOObjectFile>> |
214 | MachOUniversalBinary::getObjectForArch(StringRef ArchName) const { |
215 | if (Triple(ArchName).getArch() == Triple::ArchType::UnknownArch) |
216 | return make_error<GenericBinaryError>("Unknown architecture " |
217 | "named: " + |
218 | ArchName, |
219 | object_error::arch_not_found); |
220 | |
221 | for (auto &Obj : objects()) |
222 | if (Obj.getArchFlagName() == ArchName) |
223 | return Obj.getAsObjectFile(); |
224 | return make_error<GenericBinaryError>("fat file does not " |
225 | "contain " + |
226 | ArchName, |
227 | object_error::arch_not_found); |
228 | } |
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13 | |
14 | #ifndef LLVM_OBJECT_MACHOUNIVERSAL_H |
15 | #define LLVM_OBJECT_MACHOUNIVERSAL_H |
16 | |
17 | #include "llvm/ADT/Triple.h" |
18 | #include "llvm/ADT/iterator_range.h" |
19 | #include "llvm/BinaryFormat/MachO.h" |
20 | #include "llvm/Object/Archive.h" |
21 | #include "llvm/Object/Binary.h" |
22 | #include "llvm/Object/MachO.h" |
23 | |
24 | namespace llvm { |
25 | class StringRef; |
26 | |
27 | namespace object { |
28 | |
29 | class MachOUniversalBinary : public Binary { |
30 | virtual void anchor(); |
31 | |
32 | uint32_t Magic; |
33 | uint32_t NumberOfObjects; |
34 | public: |
35 | class ObjectForArch { |
36 | const MachOUniversalBinary *Parent; |
37 | |
38 | uint32_t Index; |
39 | |
40 | MachO::fat_arch Header; |
41 | MachO::fat_arch_64 Header64; |
42 | |
43 | public: |
44 | ObjectForArch(const MachOUniversalBinary *Parent, uint32_t Index); |
45 | |
46 | void clear() { |
47 | Parent = nullptr; |
48 | Index = 0; |
49 | } |
50 | |
51 | bool operator==(const ObjectForArch &Other) const { |
52 | return (Parent == Other.Parent) && (Index == Other.Index); |
53 | } |
54 | |
55 | ObjectForArch getNext() const { return ObjectForArch(Parent, Index + 1); } |
56 | uint32_t getCPUType() const { |
57 | if (Parent->getMagic() == MachO::FAT_MAGIC) |
| |
58 | return Header.cputype; |
| 28 | | Undefined or garbage value returned to caller |
|
59 | else |
60 | return Header64.cputype; |
61 | } |
62 | uint32_t getCPUSubType() const { |
63 | if (Parent->getMagic() == MachO::FAT_MAGIC) |
64 | return Header.cpusubtype; |
65 | else |
66 | return Header64.cpusubtype; |
67 | } |
68 | uint32_t getOffset() const { |
69 | if (Parent->getMagic() == MachO::FAT_MAGIC) |
70 | return Header.offset; |
71 | else |
72 | return Header64.offset; |
73 | } |
74 | uint32_t getSize() const { |
75 | if (Parent->getMagic() == MachO::FAT_MAGIC) |
76 | return Header.size; |
77 | else |
78 | return Header64.size; |
79 | } |
80 | uint32_t getAlign() const { |
81 | if (Parent->getMagic() == MachO::FAT_MAGIC) |
82 | return Header.align; |
83 | else |
84 | return Header64.align; |
85 | } |
86 | uint32_t getReserved() const { |
87 | if (Parent->getMagic() == MachO::FAT_MAGIC) |
88 | return 0; |
89 | else |
90 | return Header64.reserved; |
91 | } |
92 | std::string getArchFlagName() const { |
93 | const char *McpuDefault, *ArchFlag; |
94 | if (Parent->getMagic() == MachO::FAT_MAGIC) { |
95 | Triple T = |
96 | MachOObjectFile::getArchTriple(Header.cputype, Header.cpusubtype, |
97 | &McpuDefault, &ArchFlag); |
98 | } else { |
99 | Triple T = |
100 | MachOObjectFile::getArchTriple(Header64.cputype, |
101 | Header64.cpusubtype, |
102 | &McpuDefault, &ArchFlag); |
103 | } |
104 | if (ArchFlag) { |
105 | std::string ArchFlagName(ArchFlag); |
106 | return ArchFlagName; |
107 | } else { |
108 | std::string ArchFlagName(""); |
109 | return ArchFlagName; |
110 | } |
111 | } |
112 | |
113 | Expected<std::unique_ptr<MachOObjectFile>> getAsObjectFile() const; |
114 | |
115 | Expected<std::unique_ptr<Archive>> getAsArchive() const; |
116 | }; |
117 | |
118 | class object_iterator { |
119 | ObjectForArch Obj; |
120 | public: |
121 | object_iterator(const ObjectForArch &Obj) : Obj(Obj) {} |
122 | const ObjectForArch *operator->() const { return &Obj; } |
123 | const ObjectForArch &operator*() const { return Obj; } |
124 | |
125 | bool operator==(const object_iterator &Other) const { |
126 | return Obj == Other.Obj; |
127 | } |
128 | bool operator!=(const object_iterator &Other) const { |
129 | return !(*this == Other); |
130 | } |
131 | |
132 | object_iterator& operator++() { |
133 | Obj = Obj.getNext(); |
134 | return *this; |
135 | } |
136 | }; |
137 | |
138 | MachOUniversalBinary(MemoryBufferRef Souce, Error &Err); |
139 | static Expected<std::unique_ptr<MachOUniversalBinary>> |
140 | create(MemoryBufferRef Source); |
141 | |
142 | object_iterator begin_objects() const { |
143 | return ObjectForArch(this, 0); |
144 | } |
145 | object_iterator end_objects() const { |
146 | return ObjectForArch(nullptr, 0); |
147 | } |
148 | |
149 | iterator_range<object_iterator> objects() const { |
150 | return make_range(begin_objects(), end_objects()); |
151 | } |
152 | |
153 | uint32_t getMagic() const { return Magic; } |
154 | uint32_t getNumberOfObjects() const { return NumberOfObjects; } |
155 | |
156 | |
157 | static bool classof(Binary const *V) { |
158 | return V->isMachOUniversalBinary(); |
159 | } |
160 | |
161 | Expected<std::unique_ptr<MachOObjectFile>> |
162 | getObjectForArch(StringRef ArchName) const; |
163 | }; |
164 | |
165 | } |
166 | } |
167 | |
168 | #endif |