rust-lang · emilio · Mar 4, 2019 · Mar 4, 2019 · Mar 4, 2019 · Mar 4, 2019
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -9,53 +9,56 @@
   - [Removed](#removed)
   - [Fixed](#fixed)
   - [Security](#security)
-- [0.47.3](#0473)
+- [0.48.0](#0480)
   - [Changed](#changed-1)
-- [0.47.2](#0472)
   - [Fixed](#fixed-1)
-- [0.47.1](#0471)
+- [0.47.3](#0473)
   - [Changed](#changed-2)
+- [0.47.2](#0472)
   - [Fixed](#fixed-2)
-- [0.47.0](#0470)
+- [0.47.1](#0471)
   - [Changed](#changed-3)
   - [Fixed](#fixed-3)
+- [0.47.0](#0470)
+  - [Changed](#changed-4)
+  - [Fixed](#fixed-4)
 - [0.33.1 .. 0.46.0](#0331--0460)
   - [Added](#added-1)
   - [Removed](#removed-1)
-  - [Changed](#changed-4)
-  - [Fixed](#fixed-4)
-- [0.33.1](#0331)
+  - [Changed](#changed-5)
   - [Fixed](#fixed-5)
+- [0.33.1](#0331)
+  - [Fixed](#fixed-6)
 - [0.33.0](#0330)
   - [Added](#added-2)
-  - [Changed](#changed-5)
+  - [Changed](#changed-6)
   - [Deprecated](#deprecated-1)
   - [Removed](#removed-2)
-  - [Fixed](#fixed-6)
+  - [Fixed](#fixed-7)
   - [Security](#security-1)
 - [0.32.2](#0322)
-  - [Fixed](#fixed-7)
-- [0.32.1](#0321)
   - [Fixed](#fixed-8)
+- [0.32.1](#0321)
+  - [Fixed](#fixed-9)
 - [0.32.0](#0320)
   - [Added](#added-3)
-  - [Changed](#changed-6)
-  - [Fixed](#fixed-9)
+  - [Changed](#changed-7)
+  - [Fixed](#fixed-10)
 - [0.31.0](#0310)
   - [Added](#added-4)
-  - [Changed](#changed-7)
+  - [Changed](#changed-8)
   - [Deprecated](#deprecated-2)
   - [Removed](#removed-3)
-  - [Fixed](#fixed-10)
+  - [Fixed](#fixed-11)
 - [0.30.0](#0300)
   - [Added](#added-5)
-  - [Changed](#changed-8)
+  - [Changed](#changed-9)
   - [Deprecated](#deprecated-3)
-  - [Fixed](#fixed-11)
+  - [Fixed](#fixed-12)
 - [0.29.0](#0290)
   - [Added](#added-6)
-  - [Changed](#changed-9)
-  - [Fixed](#fixed-12)
+  - [Changed](#changed-10)
+  - [Fixed](#fixed-13)
 
 <!-- END doctoc generated TOC please keep comment here to allow auto update -->
 
@@ -89,6 +92,25 @@ Released YYYY/MM/DD
 
 * TODO (or remove section if none)
 
+
+--------------------------------------------------------------------------------
+
+# 0.48.0
+
+Released 2019/03/04
+
+## Changed
+
+* Default rust target was changed to 1.33, which means that bindgen can get much
+  more often the layout of structs right. [#1529][]
+
+## Fixed
+
+* Bindgen will output repr(align) just when needed for unions. [#1498][]
+
+[#1529]: https://github.com/rust-lang-nursery/rust-bindgen/issues/1529
+[#1498]: https://github.com/rust-lang-nursery/rust-bindgen/issues/1498
+
 --------------------------------------------------------------------------------
 
 # 0.47.3

diff --git a/Cargo.lock b/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
@@ -14,7 +14,7 @@ readme = "README.md"
 repository = "https://github.com/rust-lang/rust-bindgen"
 documentation = "https://docs.rs/bindgen"
 homepage = "https://rust-lang.github.io/rust-bindgen/"
-version = "0.47.3"
+version = "0.48.0"
 build = "build.rs"
 
 include = [

diff --git a/bindgen-integration/src/lib.rs b/bindgen-integration/src/lib.rs
@@ -179,7 +179,6 @@ fn test_bitfield_constructors() {
 
     let mut second = bindings::bitfields::Second {
         _bitfield_1: bindings::bitfields::Second::new_bitfield_1(1337, true),
-        __bindgen_align: [],
     };
     assert!(unsafe { second.assert(1337, true) });
 
@@ -189,7 +188,6 @@ fn test_bitfield_constructors() {
             false,
             bindings::bitfields::ItemKind::ITEM_KIND_TRES,
         ),
-        __bindgen_align: [],
     };
     assert!(unsafe {
         third.assert(42, false, bindings::bitfields::ItemKind::ITEM_KIND_TRES)

diff --git a/src/codegen/mod.rs b/src/codegen/mod.rs
@@ -1589,6 +1589,7 @@ impl CodeGenerator for CompInfo {
             // TODO(emilio): It'd be nice to unify this with the struct path
             // above somehow.
             let layout = layout.expect("Unable to get layout information?");
+            struct_layout.saw_union(layout);
 
             if struct_layout.requires_explicit_align(layout) {
                 explicit_align = Some(layout.align);
@@ -1600,8 +1601,6 @@ impl CodeGenerator for CompInfo {
                     _bindgen_union_align: #ty ,
                 }
             } else {
-                struct_layout.saw_union(layout);
-
                 quote! {
                     pub bindgen_union_field: #ty ,
                 }

diff --git a/src/codegen/struct_layout.rs b/src/codegen/struct_layout.rs
@@ -85,9 +85,9 @@ impl<'a> StructLayoutTracker<'a> {
         name: &'a str,
     ) -> Self {
         StructLayoutTracker {
-            name: name,
-            ctx: ctx,
-            comp: comp,
+            name,
+            ctx,
+            comp,
             is_packed: comp.is_packed(ctx, &ty.layout(ctx)),
             latest_offset: 0,
             padding_count: 0,

diff --git a/src/features.rs b/src/features.rs
@@ -114,7 +114,7 @@ rust_target_base!(rust_target_def);
 rust_target_base!(rust_target_values_def);
 
 /// Latest stable release of Rust
-pub const LATEST_STABLE_RUST: RustTarget = RustTarget::Stable_1_21;
+pub const LATEST_STABLE_RUST: RustTarget = RustTarget::Stable_1_33;
 
 /// Create RustFeatures struct definition, new(), and a getter for each field
 macro_rules! rust_feature_def {

diff --git a/tests/expectations/tests/16-byte-alignment.rs b/tests/expectations/tests/16-byte-alignment.rs
@@ -1,8 +1,11 @@
 /* automatically generated by rust-bindgen */
 
-
-#![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
-
+#![allow(
+    dead_code,
+    non_snake_case,
+    non_camel_case_types,
+    non_upper_case_globals
+)]
 
 #[repr(C)]
 #[derive(Copy, Clone)]
@@ -271,11 +274,12 @@ impl Default for rte_ipv6_tuple {
     }
 }
 #[repr(C)]
+#[repr(align(16))]
 #[derive(Copy, Clone)]
 pub union rte_thash_tuple {
     pub v4: rte_ipv4_tuple,
     pub v6: rte_ipv6_tuple,
-    _bindgen_union_align: [u8; 48usize],
+    _bindgen_union_align: [u128; 3usize],
 }
 #[test]
 fn bindgen_test_layout_rte_thash_tuple() {
@@ -284,6 +288,11 @@ fn bindgen_test_layout_rte_thash_tuple() {
         48usize,
         concat!("Size of: ", stringify!(rte_thash_tuple))
     );
+    assert_eq!(
+        ::std::mem::align_of::<rte_thash_tuple>(),
+        16usize,
+        concat!("Alignment of ", stringify!(rte_thash_tuple))
+    );
     assert_eq!(
         unsafe { &(*(::std::ptr::null::<rte_thash_tuple>())).v4 as *const _ as usize },
         0usize,

diff --git a/tests/expectations/tests/annotation_hide.rs b/tests/expectations/tests/annotation_hide.rs
@@ -9,6 +9,7 @@
 
 /// <div rustbindgen opaque></div>
 #[repr(C)]
+#[repr(align(4))]
 #[derive(Debug, Default, Copy, Clone)]
 pub struct D {
     pub _bindgen_opaque_blob: u32,

diff --git a/tests/expectations/tests/anon_struct_in_union.rs b/tests/expectations/tests/anon_struct_in_union.rs
@@ -1,8 +1,11 @@
 /* automatically generated by rust-bindgen */
 
-
-#![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
-
+#![allow(
+    dead_code,
+    non_snake_case,
+    non_camel_case_types,
+    non_upper_case_globals
+)]
 
 #[repr(C)]
 #[derive(Copy, Clone)]

diff --git a/tests/expectations/tests/bitfield-enum-basic.rs b/tests/expectations/tests/bitfield-enum-basic.rs
@@ -45,7 +45,7 @@ impl ::std::ops::BitAndAssign for Foo {
         self.0 &= rhs.0;
     }
 }
-#[repr(C)]
+#[repr(transparent)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub struct Foo(pub i32);
 impl Buz {
@@ -86,7 +86,7 @@ impl ::std::ops::BitAndAssign for Buz {
         self.0 &= rhs.0;
     }
 }
-#[repr(C)]
+#[repr(transparent)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub struct Buz(pub i8);
 pub const NS_FOO: _bindgen_ty_1 = _bindgen_ty_1(1);
@@ -117,7 +117,7 @@ impl ::std::ops::BitAndAssign for _bindgen_ty_1 {
         self.0 &= rhs.0;
     }
 }
-#[repr(C)]
+#[repr(transparent)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub struct _bindgen_ty_1(pub u32);
 #[repr(C)]
@@ -153,7 +153,7 @@ impl ::std::ops::BitAndAssign for Dummy__bindgen_ty_1 {
         self.0 &= rhs.0;
     }
 }
-#[repr(C)]
+#[repr(transparent)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub struct Dummy__bindgen_ty_1(pub u32);
 #[test]

diff --git a/tests/expectations/tests/bitfield-large.rs b/tests/expectations/tests/bitfield-large.rs
@@ -90,6 +90,7 @@ where
     }
 }
 #[repr(C)]
+#[repr(align(16))]
 #[derive(Debug, Default, Copy, Clone)]
 pub struct HasBigBitfield {
     pub _bitfield_1: __BindgenBitfieldUnit<[u8; 16usize], u64>,
@@ -101,8 +102,37 @@ fn bindgen_test_layout_HasBigBitfield() {
         16usize,
         concat!("Size of: ", stringify!(HasBigBitfield))
     );
+    assert_eq!(
+        ::std::mem::align_of::<HasBigBitfield>(),
+        16usize,
+        concat!("Alignment of ", stringify!(HasBigBitfield))
+    );
+}
+impl HasBigBitfield {
+    #[inline]
+    pub fn x(&self) -> i128 {
+        unsafe { ::std::mem::transmute(self._bitfield_1.get(0usize, 128u8) as u128) }
+    }
+    #[inline]
+    pub fn set_x(&mut self, val: i128) {
+        unsafe {
+            let val: u128 = ::std::mem::transmute(val);
+            self._bitfield_1.set(0usize, 128u8, val as u64)
+        }
+    }
+    #[inline]
+    pub fn new_bitfield_1(x: i128) -> __BindgenBitfieldUnit<[u8; 16usize], u64> {
+        let mut __bindgen_bitfield_unit: __BindgenBitfieldUnit<[u8; 16usize], u64> =
+            Default::default();
+        __bindgen_bitfield_unit.set(0usize, 128u8, {
+            let x: u128 = unsafe { ::std::mem::transmute(x) };
+            x as u64
+        });
+        __bindgen_bitfield_unit
+    }
 }
 #[repr(C)]
+#[repr(align(16))]
 #[derive(Debug, Default, Copy, Clone)]
 pub struct HasTwoBigBitfields {
     pub _bitfield_1: __BindgenBitfieldUnit<[u8; 16usize], u64>,
@@ -114,4 +144,47 @@ fn bindgen_test_layout_HasTwoBigBitfields() {
         16usize,
         concat!("Size of: ", stringify!(HasTwoBigBitfields))
     );
+    assert_eq!(
+        ::std::mem::align_of::<HasTwoBigBitfields>(),
+        16usize,
+        concat!("Alignment of ", stringify!(HasTwoBigBitfields))
+    );
+}
+impl HasTwoBigBitfields {
+    #[inline]
+    pub fn x(&self) -> i128 {
+        unsafe { ::std::mem::transmute(self._bitfield_1.get(0usize, 80u8) as u128) }
+    }
+    #[inline]
+    pub fn set_x(&mut self, val: i128) {
+        unsafe {
+            let val: u128 = ::std::mem::transmute(val);
+            self._bitfield_1.set(0usize, 80u8, val as u64)
+        }
+    }
+    #[inline]
+    pub fn y(&self) -> i128 {
+        unsafe { ::std::mem::transmute(self._bitfield_1.get(80usize, 48u8) as u128) }
+    }
+    #[inline]
+    pub fn set_y(&mut self, val: i128) {
+        unsafe {
+            let val: u128 = ::std::mem::transmute(val);
+            self._bitfield_1.set(80usize, 48u8, val as u64)
+        }
+    }
+    #[inline]
+    pub fn new_bitfield_1(x: i128, y: i128) -> __BindgenBitfieldUnit<[u8; 16usize], u64> {
+        let mut __bindgen_bitfield_unit: __BindgenBitfieldUnit<[u8; 16usize], u64> =
+            Default::default();
+        __bindgen_bitfield_unit.set(0usize, 80u8, {
+            let x: u128 = unsafe { ::std::mem::transmute(x) };
+            x as u64
+        });
+        __bindgen_bitfield_unit.set(80usize, 48u8, {
+            let y: u128 = unsafe { ::std::mem::transmute(y) };
+            y as u64
+        });
+        __bindgen_bitfield_unit
+    }
 }