================
@@ -1977,3 +1983,72 @@ mlir::Value
CIRGenItaniumCXXABI::emitDynamicCast(CIRGenFunction &cgf,
return cgf.getBuilder().createDynCast(loc, src.getPointer(), destCIRTy,
isRefCast, castInfo);
}
+
+/************************** Array allocation cookies
**************************/
+
+CharUnits CIRGenItaniumCXXABI::getArrayCookieSizeImpl(QualType elementType) {
+ // The array cookie is a size_t; pad that up to the element alignment.
+ // The cookie is actually right-justified in that space.
+ return std::max(
+ CharUnits::fromQuantity(cgm.SizeSizeInBytes),
+ cgm.getASTContext().getPreferredTypeAlignInChars(elementType));
+}
+
+Address CIRGenItaniumCXXABI::initializeArrayCookie(CIRGenFunction &cgf,
+ Address newPtr,
+ mlir::Value numElements,
+ const CXXNewExpr *e,
+ QualType elementType) {
+ assert(requiresArrayCookie(e));
+
+ // TODO: Get the address space when sanitizer support is implemented.
----------------
andykaylor wrote:
```suggestion
// TODO: When sanitizer support is implemented, we'll need to
// get the address space from `newPtr`.
assert(!cir::MissingFeatures::addressSpace());
assert(!cir::MissingFeatures::sanitizers());
```
It took me a minute to see what this had to do with the sanitizer. When the
sanitizer check is implemented, it will only check the cookie for address space
zero.
https://github.com/llvm/llvm-project/pull/163649
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