ctest: add foreign static test

Author: mbyx

ctest-next/src/ffi_items.rs

@@ -63,7 +63,6 @@ impl FfiItems {
     }
 
     /// Return a list of all foreign statics found mapped by their ABI.
-    #[cfg_attr(not(test), expect(unused))]
     pub(crate) fn foreign_statics(&self) -> &Vec<Static> {
         &self.foreign_statics
     }

ctest-next/src/template.rs

@@ -50,6 +50,7 @@ impl CTestTemplate {
 /// Stores all information necessary for generation of tests for all items.
 #[derive(Clone, Debug, Default)]
 pub(crate) struct TestTemplate {
+    pub foreign_static_tests: Vec<TestForeignStatic>,
     pub field_ptr_tests: Vec<TestFieldPtr>,
     pub field_size_offset_tests: Vec<TestFieldSizeOffset>,
     pub roundtrip_tests: Vec<TestRoundtrip>,
@@ -75,6 +76,7 @@ impl TestTemplate {
         template.populate_field_size_offset_tests(&helper)?;
         template.populate_field_ptr_tests(&helper)?;
         template.populate_roundtrip_tests(&helper)?;
+        template.populate_foreign_static_tests(&helper)?;
 
         Ok(template)
     }
@@ -380,6 +382,28 @@ impl TestTemplate {
 
         Ok(())
     }
+
+    /// Populates tests for foreign statics, keeping track of the names of each test.
+    fn populate_foreign_static_tests(
+        &mut self,
+        helper: &TranslateHelper,
+    ) -> Result<(), TranslationError> {
+        for static_ in helper.ffi_items.foreign_statics() {
+            let rust_ty = static_.ty.to_token_stream().to_string().into_boxed_str();
+
+            let item = TestForeignStatic {
+                test_name: static_test_ident(static_.ident()),
+                id: static_.ident().into(),
+                c_val: helper.c_ident(static_).into_boxed_str(),
+                rust_ty,
+            };
+
+            self.foreign_static_tests.push(item.clone());
+            self.test_idents.push(item.test_name);
+        }
+
+        Ok(())
+    }
 }
 
 /* Many test structures have the following fields:
@@ -457,6 +481,14 @@ pub(crate) struct TestRoundtrip {
     pub is_alias: bool,
 }
 
+#[derive(Clone, Debug)]
+pub(crate) struct TestForeignStatic {
+    pub test_name: BoxStr,
+    pub id: BoxStr,
+    pub c_val: BoxStr,
+    pub rust_ty: BoxStr,
+}
+
 fn signededness_test_ident(ident: &str) -> BoxStr {
     format!("ctest_signededness_{ident}").into()
 }
@@ -485,6 +517,10 @@ fn roundtrip_test_ident(ident: &str) -> BoxStr {
     format!("ctest_roundtrip_{ident}").into()
 }
 
+fn static_test_ident(ident: &str) -> BoxStr {
+    format!("ctest_static_{ident}").into()
+}
+
 /// Wrap methods that depend on both ffi items and the generator.
 pub(crate) struct TranslateHelper<'a> {
     ffi_items: &'a FfiItems,

ctest-next/templates/test.c

@@ -118,3 +118,12 @@ ctest_field_ptr__{{ item.id }}__{{ item.field.ident() }}({{ item.c_ty }} *b) {
 #ifdef _MSC_VER
 #  pragma warning(default:4365)
 #endif
+
+{%- for static_ in ctx.foreign_static_tests +%}
+
+// Return a pointer to the static variable content.
+void *ctest_static__{{ static_.id }}(void) {
+    // FIXME(ctest): Not correct due to casting the function to a data pointer.
+    return (void *)&{{ static_.c_val }};
+}
+{%- endfor +%}

ctest-next/templates/test.rs

@@ -10,7 +10,7 @@ mod generated_tests {
     #![allow(non_snake_case)]
     #![deny(improper_ctypes_definitions)]
     #[allow(unused_imports)]
-    use std::ffi::{CStr, c_int, c_char};
+    use std::ffi::{CStr, c_int, c_char, c_uint};
     use std::fmt::{Debug, LowerHex};
     use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
     #[allow(unused_imports)]
@@ -314,6 +314,21 @@ mod generated_tests {
         }
     }
 {%- endfor +%}
+
+{%- for static_ in ctx.foreign_static_tests +%}
+
+    // Tests if the pointer to the static variable matches in both Rust and C.
+    pub fn {{ static_.test_name }}() {
+        extern "C" {
+            fn ctest_static__{{ static_.id }}() -> *const {{ static_.rust_ty }};
+        }
+        let actual = (&raw const {{ static_.id }}).addr();
+        let expected = unsafe {
+            ctest_static__{{ static_.id }}().addr()
+        };
+        check_same(actual, expected, "{{ static_.id }} static");
+    }
+{%- endfor +%}
 }
 
 use generated_tests::*;

ctest-next/tests/input/hierarchy.out.c

@@ -64,3 +64,9 @@ in6_addr ctest_roundtrip__in6_addr(
 #ifdef _MSC_VER
 #  pragma warning(default:4365)
 #endif
+
+// Return a pointer to the static variable content.
+void *ctest_static__in6addr_any(void) {
+    // FIXME(ctest): Not correct due to casting the function to a data pointer.
+    return (void *)&in6addr_any;
+}

ctest-next/tests/input/hierarchy.out.rs

@@ -7,7 +7,7 @@ mod generated_tests {
     #![allow(non_snake_case)]
     #![deny(improper_ctypes_definitions)]
     #[allow(unused_imports)]
-    use std::ffi::{CStr, c_int, c_char};
+    use std::ffi::{CStr, c_int, c_char, c_uint};
     use std::fmt::{Debug, LowerHex};
     use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
     #[allow(unused_imports)]
@@ -213,6 +213,18 @@ mod generated_tests {
             }
         }
     }
+
+    // Tests if the pointer to the static variable matches in both Rust and C.
+    pub fn ctest_static_in6addr_any() {
+        extern "C" {
+            fn ctest_static__in6addr_any() -> *const in6_addr;
+        }
+        let actual = (&raw const in6addr_any).addr();
+        let expected = unsafe {
+            ctest_static__in6addr_any().addr()
+        };
+        check_same(actual, expected, "in6addr_any static");
+    }
 }
 
 use generated_tests::*;
@@ -236,4 +248,5 @@ fn run_all() {
     ctest_size_align_in6_addr();
     ctest_signededness_in6_addr();
     ctest_roundtrip_in6_addr();
+    ctest_static_in6addr_any();
 }

ctest-next/tests/input/hierarchy/foo.rs

@@ -6,5 +6,5 @@ pub const ON: bool = true;
 unsafe extern "C" {
     fn malloc(size: usize) -> *mut c_void;
 
-    static in6addr_any: in6_addr;
+    pub static in6addr_any: in6_addr;
 }

ctest-next/tests/input/macro.out.rs

@@ -7,7 +7,7 @@ mod generated_tests {
     #![allow(non_snake_case)]
     #![deny(improper_ctypes_definitions)]
     #[allow(unused_imports)]
-    use std::ffi::{CStr, c_int, c_char};
+    use std::ffi::{CStr, c_int, c_char, c_uint};
     use std::fmt::{Debug, LowerHex};
     use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
     #[allow(unused_imports)]

ctest-next/tests/input/simple.out.with-renames.rs

@@ -7,7 +7,7 @@ mod generated_tests {
     #![allow(non_snake_case)]
     #![deny(improper_ctypes_definitions)]
     #[allow(unused_imports)]
-    use std::ffi::{CStr, c_int, c_char};
+    use std::ffi::{CStr, c_int, c_char, c_uint};
     use std::fmt::{Debug, LowerHex};
     use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
     #[allow(unused_imports)]

ctest-next/tests/input/simple.out.with-skips.rs

@@ -7,7 +7,7 @@ mod generated_tests {
     #![allow(non_snake_case)]
     #![deny(improper_ctypes_definitions)]
     #[allow(unused_imports)]
-    use std::ffi::{CStr, c_int, c_char};
+    use std::ffi::{CStr, c_int, c_char, c_uint};
     use std::fmt::{Debug, LowerHex};
     use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
     #[allow(unused_imports)]