Fix for check_ptr_call for variadic functions

Author: antoyo

build_sysroot/build_sysroot.sh

@@ -30,9 +30,10 @@ mkdir -p sysroot/lib/rustlib/$TARGET_TRIPLE/lib/
 cp -r target/$TARGET_TRIPLE/$sysroot_channel/deps/* sysroot/lib/rustlib/$TARGET_TRIPLE/lib/
 
 # Since we can't override the sysroot for the UI tests anymore, we create a new toolchain and manually overwrite the sysroot directory.
-rust_toolchain=$(cat ../rust-toolchain | grep channel | sed 's/channel = "\(.*\)"/\1/')
-my_toolchain_dir=$HOME/.rustup/toolchains/codegen_gcc_ui_tests-$rust_toolchain-$TARGET_TRIPLE
-rm -rf $my_toolchain_dir
-cp -r $HOME/.rustup/toolchains/$rust_toolchain-$TARGET_TRIPLE $my_toolchain_dir
-rm -rf $my_toolchain_dir/lib/rustlib/$TARGET_TRIPLE/
-cp -r ../build_sysroot/sysroot/* $my_toolchain_dir
+# TODO: to remove.
+#rust_toolchain=$(cat ../rust-toolchain | grep channel | sed 's/channel = "\(.*\)"/\1/')
+#my_toolchain_dir=$HOME/.rustup/toolchains/codegen_gcc_ui_tests-$rust_toolchain-$TARGET_TRIPLE
+#rm -rf $my_toolchain_dir
+#cp -r $HOME/.rustup/toolchains/$rust_toolchain-$TARGET_TRIPLE $my_toolchain_dir
+#rm -rf $my_toolchain_dir/lib/rustlib/$TARGET_TRIPLE/
+#cp -r ../build_sysroot/sysroot/* $my_toolchain_dir

src/builder.rs

@@ -181,6 +181,8 @@ impl<'a, 'gcc, 'tcx> Builder<'a, 'gcc, 'tcx> {
             })
             .collect();
 
+        debug_assert_eq!(casted_args.len(), args.len());
+
         Cow::Owned(casted_args)
     }
 
@@ -207,7 +209,7 @@ impl<'a, 'gcc, 'tcx> Builder<'a, 'gcc, 'tcx> {
 
         let func_name = format!("{:?}", func_ptr);
 
-        let casted_args: Vec<_> = param_types
+        let mut casted_args: Vec<_> = param_types
             .into_iter()
             .zip(args.iter())
             .enumerate()
@@ -237,6 +239,11 @@ impl<'a, 'gcc, 'tcx> Builder<'a, 'gcc, 'tcx> {
             })
             .collect();
 
+        // NOTE: to take into account variadic functions.
+        for i in casted_args.len()..args.len() {
+            casted_args.push(args[i]);
+        }
+
         Cow::Owned(casted_args)
     }