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Fix undefined behavior in DWARFASTParser::ParseChildArrayInfo()

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PR40827: https://bugs.llvm.org/show_bug.cgi?id=40827
<rdar://problem/48729057>

llvm-svn: 358137
This commit is contained in:
Adrian Prantl 2019-04-10 21:18:44 +00:00
parent de051dfe02
commit 3cc634d093
2 changed files with 5 additions and 3 deletions
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6
lldb/include/lldb/Symbol/SymbolFile.h
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@ -132,10 +132,10 @@ public:
/// The characteristics of an array type. /// The characteristics of an array type.
struct ArrayInfo { struct ArrayInfo {
int64_t first_index; int64_t first_index = 0;
llvm::SmallVector<uint64_t, 1> element_orders; llvm::SmallVector<uint64_t, 1> element_orders;
uint32_t byte_stride; uint32_t byte_stride = 0;
uint32_t bit_stride; uint32_t bit_stride = 0;
}; };
/// If \c type_uid points to an array type, return its characteristics. /// If \c type_uid points to an array type, return its characteristics.
/// To support variable-length array types, this function takes an /// To support variable-length array types, this function takes an

2
lldb/packages/Python/lldbsuite/test/lang/c/array_types/TestArrayTypes.py
View File

@ -175,6 +175,8 @@ class ArrayTypesTestCase(TestBase):
self.DebugSBValue(variable) self.DebugSBValue(variable)
self.assertTrue(variable.GetNumChildren() == 4, self.assertTrue(variable.GetNumChildren() == 4,
"Variable 'strings' should have 4 children") "Variable 'strings' should have 4 children")
byte_size = variable.GetByteSize()
self.assertTrue(byte_size >= 4*4 and byte_size <= 1024)
child3 = variable.GetChildAtIndex(3) child3 = variable.GetChildAtIndex(3)
self.DebugSBValue(child3) self.DebugSBValue(child3)