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clang-format: Fix use-heap-after-free bug. 

Discovered by the awesome test case and ASAN.

llvm-svn: 226678
This commit is contained in:
Daniel Jasper 2015-01-21 17:35:29 +00:00
parent 17c57ecf4a
commit fd725c060b
2 changed files with 9 additions and 5 deletions
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12
clang/lib/Format/TokenAnnotator.h
View File

@ -59,11 +59,8 @@ public:
I->Tok->Previous = Current;
Current = Current->Next;
Current->Children.clear();
for (SmallVectorImpl<UnwrappedLine>::const_iterator
I = Node.Children.begin(),
E = Node.Children.end();
I != E; ++I) {
Children.push_back(new AnnotatedLine(*I));
for (const auto& Child : Node.Children) {
Children.push_back(new AnnotatedLine(Child));
Current->Children.push_back(Children.back());
}
}
@ -75,6 +72,11 @@ public:
for (unsigned i = 0, e = Children.size(); i != e; ++i) {
delete Children[i];
}
FormatToken *Current = First;
while (Current) {
Current->Children.clear();
Current = Current->Next;
}
}
FormatToken *First;

2
clang/unittests/Format/FormatTest.cpp
View File

@ -2610,6 +2610,8 @@ TEST_F(FormatTest, MacroDefinitionsWithIncompleteCode) {
getLLVMStyleWithColumns(28));
verifyFormat("#d, = };");
verifyFormat("#if \"a");
verifyNoCrash("#if a\na(\n#else\n#endif\n{a");
}
TEST_F(FormatTest, MacrosWithoutTrailingSemicolon) {