os_log: Allow specifying mask type in format string.
A mask type is a 1 to 8-byte string that follows the "mask." annotation
in the format string. This enables obfuscating data in the event the
provided privacy level isn't enabled.
rdar://problem/36756282
llvm-svn: 346211
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 76b46c7..4699a0c 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -1168,7 +1168,12 @@
llvm::Value *ArgVal;
- if (const Expr *TheExpr = Item.getExpr()) {
+ if (Item.getKind() == analyze_os_log::OSLogBufferItem::MaskKind) {
+ uint64_t Val = 0;
+ for (unsigned I = 0, E = Item.getMaskType().size(); I < E; ++I)
+ Val |= ((unsigned )Item.getMaskType()[I]) << I * 8;
+ ArgVal = llvm::Constant::getIntegerValue(Int64Ty, llvm::APInt(64, Val));
+ } else if (const Expr *TheExpr = Item.getExpr()) {
ArgVal = EmitScalarExpr(TheExpr, /*Ignore*/ false);
// Check if this is a retainable type.