Fix undefined behavior when compiling in C++14 mode (with sized deletion
enabled): ensure that we do not invoke the sized deallocator for MemoryBuffer
subclasses that have tail-allocated data.
llvm-svn: 259735
diff --git a/llvm/lib/Support/MemoryBuffer.cpp b/llvm/lib/Support/MemoryBuffer.cpp
index 25ddfe5..b935cbf 100644
--- a/llvm/lib/Support/MemoryBuffer.cpp
+++ b/llvm/lib/Support/MemoryBuffer.cpp
@@ -86,6 +86,10 @@
init(InputData.begin(), InputData.end(), RequiresNullTerminator);
}
+ /// Disable sized deallocation for MemoryBufferMem, because it has
+ /// tail-allocated data.
+ void operator delete(void *p) { ::operator delete(p); }
+
const char *getBufferIdentifier() const override {
// The name is stored after the class itself.
return reinterpret_cast<const char*>(this + 1);
@@ -213,6 +217,10 @@
}
}
+ /// Disable sized deallocation for MemoryBufferMMapFile, because it has
+ /// tail-allocated data.
+ void operator delete(void *p) { ::operator delete(p); }
+
const char *getBufferIdentifier() const override {
// The name is stored after the class itself.
return reinterpret_cast<const char *>(this + 1);