[clang] [llvm] [clang][DebugInfo] Add symbol for debugger with VTable information. (PR #130255)
Michael Buch via cfe-commits
cfe-commits at lists.llvm.org
Tue May 27 10:10:34 PDT 2025
================
@@ -2518,6 +2518,59 @@ StringRef CGDebugInfo::getVTableName(const CXXRecordDecl *RD) {
return internString("_vptr$", RD->getNameAsString());
}
+// Emit symbol for the debugger that points to the vtable address for
+// the given class. The symbol is named as '_vtable$'.
+// The debugger does not need to know any details about the contents of the
+// vtable as it can work this out using its knowledge of the ABI and the
+// existing information in the DWARF. The type is assumed to be 'void *'.
+void CGDebugInfo::emitVTableSymbol(llvm::GlobalVariable *VTable,
+ const CXXRecordDecl *RD) {
+ if (!CGM.getTarget().getCXXABI().isItaniumFamily())
+ return;
+
+ ASTContext &Context = CGM.getContext();
+ SmallString<64> Buffer;
+ StringRef SymbolName = "_vtable$";
+ const DeclContext *DC = static_cast<const DeclContext *>(RD);
----------------
Michael137 wrote:
I *think* this cast is redundant. You should be able to just pass `RD` into `getContextDescriptor`
https://github.com/llvm/llvm-project/pull/130255
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