Bug Summary

File:tools/clang/tools/libclang/BuildSystem.cpp
Warning:line 146, column 3
Null pointer passed as an argument to a 'nonnull' parameter

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name BuildSystem.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 -relaxed-aliasing -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 CLANG_TOOL_EXTRA_BUILD -D _CINDEX_LIB_ -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-7~svn337490/build-llvm/tools/clang/tools/libclang -I /build/llvm-toolchain-snapshot-7~svn337490/tools/clang/tools/libclang -I /build/llvm-toolchain-snapshot-7~svn337490/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn337490/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn337490/build-llvm/include -I /build/llvm-toolchain-snapshot-7~svn337490/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/x86_64-linux-gnu/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/x86_64-linux-gnu/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/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/lib/gcc/x86_64-linux-gnu/8/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~svn337490/build-llvm/tools/clang/tools/libclang -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-07-20-043646-20380-1 -x c++ /build/llvm-toolchain-snapshot-7~svn337490/tools/clang/tools/libclang/BuildSystem.cpp -faddrsig
1//===- BuildSystem.cpp - Utilities for use by build systems ---------------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements various utilities for use by build systems.
11//
12//===----------------------------------------------------------------------===//
13
14#include "clang-c/BuildSystem.h"
15#include "CXString.h"
16#include "clang/Basic/VirtualFileSystem.h"
17#include "llvm/ADT/SmallString.h"
18#include "llvm/Support/CBindingWrapping.h"
19#include "llvm/Support/Chrono.h"
20#include "llvm/Support/ErrorHandling.h"
21#include "llvm/Support/Path.h"
22#include "llvm/Support/raw_ostream.h"
23
24using namespace clang;
25using namespace llvm::sys;
26
27unsigned long long clang_getBuildSessionTimestamp(void) {
28 return llvm::sys::toTimeT(std::chrono::system_clock::now());
29}
30
31DEFINE_SIMPLE_CONVERSION_FUNCTIONS(clang::vfs::YAMLVFSWriter,inline clang::vfs::YAMLVFSWriter *unwrap(CXVirtualFileOverlay
P) { return reinterpret_cast<clang::vfs::YAMLVFSWriter*>
(P); } inline CXVirtualFileOverlay wrap(const clang::vfs::YAMLVFSWriter
*P) { return reinterpret_cast<CXVirtualFileOverlay>(const_cast
<clang::vfs::YAMLVFSWriter*>(P)); }
32 CXVirtualFileOverlay)inline clang::vfs::YAMLVFSWriter *unwrap(CXVirtualFileOverlay
P) { return reinterpret_cast<clang::vfs::YAMLVFSWriter*>
(P); } inline CXVirtualFileOverlay wrap(const clang::vfs::YAMLVFSWriter
*P) { return reinterpret_cast<CXVirtualFileOverlay>(const_cast
<clang::vfs::YAMLVFSWriter*>(P)); }
33
34CXVirtualFileOverlay clang_VirtualFileOverlay_create(unsigned) {
35 return wrap(new clang::vfs::YAMLVFSWriter());
36}
37
38enum CXErrorCode
39clang_VirtualFileOverlay_addFileMapping(CXVirtualFileOverlay VFO,
40 const char *virtualPath,
41 const char *realPath) {
42 if (!VFO || !virtualPath || !realPath)
43 return CXError_InvalidArguments;
44 if (!path::is_absolute(virtualPath))
45 return CXError_InvalidArguments;
46 if (!path::is_absolute(realPath))
47 return CXError_InvalidArguments;
48
49 for (path::const_iterator
50 PI = path::begin(virtualPath),
51 PE = path::end(virtualPath); PI != PE; ++PI) {
52 StringRef Comp = *PI;
53 if (Comp == "." || Comp == "..")
54 return CXError_InvalidArguments;
55 }
56
57 unwrap(VFO)->addFileMapping(virtualPath, realPath);
58 return CXError_Success;
59}
60
61enum CXErrorCode
62clang_VirtualFileOverlay_setCaseSensitivity(CXVirtualFileOverlay VFO,
63 int caseSensitive) {
64 if (!VFO)
65 return CXError_InvalidArguments;
66 unwrap(VFO)->setCaseSensitivity(caseSensitive);
67 return CXError_Success;
68}
69
70enum CXErrorCode
71clang_VirtualFileOverlay_writeToBuffer(CXVirtualFileOverlay VFO, unsigned,
72 char **out_buffer_ptr,
73 unsigned *out_buffer_size) {
74 if (!VFO || !out_buffer_ptr || !out_buffer_size)
75 return CXError_InvalidArguments;
76
77 llvm::SmallString<256> Buf;
78 llvm::raw_svector_ostream OS(Buf);
79 unwrap(VFO)->write(OS);
80
81 StringRef Data = OS.str();
82 *out_buffer_ptr = static_cast<char*>(llvm::safe_malloc(Data.size()));
83 *out_buffer_size = Data.size();
84 memcpy(*out_buffer_ptr, Data.data(), Data.size());
85 return CXError_Success;
86}
87
88void clang_free(void *buffer) {
89 free(buffer);
90}
91
92void clang_VirtualFileOverlay_dispose(CXVirtualFileOverlay VFO) {
93 delete unwrap(VFO);
94}
95
96
97struct CXModuleMapDescriptorImpl {
98 std::string ModuleName;
99 std::string UmbrellaHeader;
100};
101
102CXModuleMapDescriptor clang_ModuleMapDescriptor_create(unsigned) {
103 return new CXModuleMapDescriptorImpl();
104}
105
106enum CXErrorCode
107clang_ModuleMapDescriptor_setFrameworkModuleName(CXModuleMapDescriptor MMD,
108 const char *name) {
109 if (!MMD || !name)
110 return CXError_InvalidArguments;
111
112 MMD->ModuleName = name;
113 return CXError_Success;
114}
115
116enum CXErrorCode
117clang_ModuleMapDescriptor_setUmbrellaHeader(CXModuleMapDescriptor MMD,
118 const char *name) {
119 if (!MMD || !name)
120 return CXError_InvalidArguments;
121
122 MMD->UmbrellaHeader = name;
123 return CXError_Success;
124}
125
126enum CXErrorCode
127clang_ModuleMapDescriptor_writeToBuffer(CXModuleMapDescriptor MMD, unsigned,
128 char **out_buffer_ptr,
129 unsigned *out_buffer_size) {
130 if (!MMD || !out_buffer_ptr || !out_buffer_size)
1
Assuming 'MMD' is non-null
→
2
←
Assuming 'out_buffer_ptr' is non-null
→
3
←
Assuming 'out_buffer_size' is non-null
→
4
←
Taking false branch
→
131 return CXError_InvalidArguments;
132
133 llvm::SmallString<256> Buf;
134 llvm::raw_svector_ostream OS(Buf);
135 OS << "framework module " << MMD->ModuleName << " {\n";
136 OS << " umbrella header \"";
137 OS.write_escaped(MMD->UmbrellaHeader) << "\"\n";
138 OS << '\n';
139 OS << " export *\n";
140 OS << " module * { export * }\n";
141 OS << "}\n";
142
143 StringRef Data = OS.str();
144 *out_buffer_ptr = static_cast<char*>(llvm::safe_malloc(Data.size()));
145 *out_buffer_size = Data.size();
146 memcpy(*out_buffer_ptr, Data.data(), Data.size());
5
←
Null pointer passed as an argument to a 'nonnull' parameter
147 return CXError_Success;
148}
149
150void clang_ModuleMapDescriptor_dispose(CXModuleMapDescriptor MMD) {
151 delete MMD;
152}