Update a number of dependencies

.github/workflows/main.yml

@@ -15,8 +15,8 @@ jobs:
     - name: Install wabt
       run: |
         set -e
-        curl -L https://github.com/WebAssembly/wabt/releases/download/1.0.12/wabt-1.0.12-linux.tar.gz | tar xzf -
-        echo "##[add-path]`pwd`/wabt-1.0.12"
+        curl -L https://github.com/WebAssembly/wabt/releases/download/1.0.13/wabt-1.0.13-linux.tar.gz | tar xzf -
+        echo "##[add-path]`pwd`/wabt-1.0.13"
     - name: Install binaryen
       run: |
         set -e
@@ -38,8 +38,8 @@ jobs:
     - name: Install wabt
       run: |
         set -e
-        curl -L https://github.com/WebAssembly/wabt/releases/download/1.0.12/wabt-1.0.12-linux.tar.gz | tar xzf -
-        echo "##[add-path]`pwd`/wabt-1.0.12"
+        curl -L https://github.com/WebAssembly/wabt/releases/download/1.0.13/wabt-1.0.13-linux.tar.gz | tar xzf -
+        echo "##[add-path]`pwd`/wabt-1.0.13"
     - name: Install binaryen
       run: |
         set -e
@@ -65,8 +65,8 @@ jobs:
     - name: Install wabt
       run: |
         set -e
-        curl -L https://github.com/WebAssembly/wabt/releases/download/1.0.12/wabt-1.0.12-linux.tar.gz | tar xzf -
-        echo "##[add-path]`pwd`/wabt-1.0.12"
+        curl -L https://github.com/WebAssembly/wabt/releases/download/1.0.13/wabt-1.0.13-linux.tar.gz | tar xzf -
+        echo "##[add-path]`pwd`/wabt-1.0.13"
     - name: Install binaryen
       run: |
         set -e

Cargo.toml

@@ -29,7 +29,7 @@ leb128 = "0.2.4"
 log = "0.4.8"
 rayon = { version = "1.1.0", optional = true }
 walrus-macro = { path = './crates/macro', version = '=0.14.0' }
-wasmparser = "0.45.0"
+wasmparser = "0.48.0"
 
 [features]
 parallel = ['rayon', 'id-arena/rayon']

crates/tests/tests/spec-tests.rs

@@ -38,6 +38,11 @@ fn run(wast: &Path) -> Result<(), anyhow::Error> {
 
         // TODO: should get threads working
         Some("threads") => return Ok(()),
+        // TODO: should get simd working
+        Some("simd") => return Ok(()),
+        // TODO: should get tail-call working
+        Some("tail-call") => return Ok(()),
+
         // Some("threads") => &["--enable-threads"],
         Some(other) => panic!("unknown wasm proposal: {}", other),
     };

src/error.rs

@@ -4,7 +4,7 @@ pub use anyhow::Error;
 use std::fmt;
 
 /// Either `Ok(T)` or `Err(failure::Error)`.
-pub type Result<T> = ::std::result::Result<T, anyhow::Error>;
+pub use anyhow::Result;
 
 /// A leaf wasm error type.
 ///

src/ir/mod.rs

@@ -320,7 +320,12 @@ pub enum Instr {
     },
 
     /// `select`
-    Select {},
+    Select {
+        /// Optionally listed type that the `select` instruction is expected to
+        /// produce, used in subtyping relations with the gc proposal.
+        #[walrus(skip_visit)]
+        ty: Option<ValType>,
+    },
 
     /// `unreachable`
     Unreachable {},

src/module/elements.rs

@@ -76,13 +76,12 @@ impl Module {
             let segment = segment?;
 
             match segment.kind {
-                wasmparser::ElementKind::Passive { .. } => {
+                wasmparser::ElementKind::Passive { .. } | wasmparser::ElementKind::Declared => {
                     bail!("passive element segments not supported yet");
                 }
                 wasmparser::ElementKind::Active {
                     table_index,
                     init_expr,
-                    items,
                 } => {
                     let table = ids.get_table(table_index)?;
                     let table = match &mut self.tables.get_mut(table).kind {
@@ -94,10 +93,17 @@ impl Module {
 
                     let offset = InitExpr::eval(&init_expr, ids)
                         .with_context(|| format!("in segment {}", i))?;
-                    let functions = items.get_items_reader()?.into_iter().map(|func| {
-                        let func = func?;
-                        ids.get_func(func)
-                    });
+                    let functions =
+                        segment
+                            .items
+                            .get_items_reader()?
+                            .into_iter()
+                            .map(|e| -> Result<_> {
+                                Ok(match e? {
+                                    wasmparser::ElementItem::Func(f) => Some(ids.get_func(f)?),
+                                    wasmparser::ElementItem::Null => None,
+                                })
+                            });
 
                     match offset {
                         InitExpr::Value(Value::I32(n)) => {
@@ -106,7 +112,7 @@ impl Module {
                                 while i + offset + 1 > table.elements.len() {
                                     table.elements.push(None);
                                 }
-                                table.elements[i + offset] = Some(id?);
+                                table.elements[i + offset] = id?;
                             }
                         }
                         InitExpr::Global(global) if self.globals.get(global).ty == ValType::I32 => {
@@ -181,11 +187,12 @@ impl Emit for ModuleElements {
         //
         // Note that much of this is in accordance with the
         // currently-in-progress bulk-memory proposal for WebAssembly.
-        let active_table_header = |cx: &mut EmitContext, index: u32| {
+        let active_table_header = |cx: &mut EmitContext, index: u32, exprs: bool| {
+            let exprs_bit = if exprs { 0x4 } else { 0x0 };
             if index == 0 {
-                cx.encoder.byte(0x00);
+                cx.encoder.byte(0x00 | exprs_bit);
             } else {
-                cx.encoder.byte(0x02);
+                cx.encoder.byte(0x02 | exprs_bit);
                 cx.encoder.u32(index);
             }
         };
@@ -194,7 +201,7 @@ impl Emit for ModuleElements {
         // constant offsets
         for (&id, table, offset, len) in chunks {
             let table_index = cx.indices.get_table_index(id);
-            active_table_header(&mut cx, table_index);
+            active_table_header(&mut cx, table_index, false);
             InitExpr::Value(Value::I32(offset as i32)).emit(&mut cx);
             cx.encoder.usize(len);
             for item in table.elements[offset..][..len].iter() {
@@ -208,12 +215,27 @@ impl Emit for ModuleElements {
         for (id, table) in active.iter() {
             let table_index = cx.indices.get_table_index(*id);
             for (global, list) in table.relative_elements.iter() {
-                active_table_header(&mut cx, table_index);
+                let exprs = list.iter().any(|i| i.is_none());
+                active_table_header(&mut cx, table_index, exprs);
                 InitExpr::Global(*global).emit(&mut cx);
                 cx.encoder.usize(list.len());
                 for func in list {
-                    let index = cx.indices.get_func_index(*func);
-                    cx.encoder.u32(index);
+                    match func {
+                        Some(id) => {
+                            let index = cx.indices.get_func_index(*id);
+                            if exprs {
+                                cx.encoder.byte(0xd2);
+                                cx.encoder.u32(index);
+                                cx.encoder.byte(0x0b);
+                            } else {
+                                cx.encoder.u32(index);
+                            }
+                        }
+                        None => {
+                            cx.encoder.byte(0xd1);
+                            cx.encoder.byte(0x0b);
+                        }
+                    }
                 }
             }
         }

src/module/functions/local_function/emit.rs

@@ -530,8 +530,17 @@ impl<'instr> Visitor<'instr> for Emit<'_, '_> {
                 }
             }
 
-            Select(_) => {
-                self.encoder.byte(0x1b); // select
+            Select(e) => {
+                match e.ty {
+                    Some(ty) => {
+                        self.encoder.byte(0x1c);
+                        self.encoder.byte(0x01);
+                        ty.emit(self.encoder);
+                    }
+                    None => {
+                        self.encoder.byte(0x1b); // select
+                    }
+                }
             }
 
             Unreachable(_) => {

src/module/functions/local_function/mod.rs

@@ -608,7 +608,15 @@ fn validate_instruction<'context>(
             ctx.pop_operand_expected(Some(I32))?;
             let t1 = ctx.pop_operand()?;
             let t2 = ctx.pop_operand_expected(t1)?;
-            ctx.alloc_instr(Select {}, loc);
+            ctx.alloc_instr(Select { ty: None }, loc);
+            ctx.push_operand(t2);
+        }
+        Operator::TypedSelect { ty } => {
+            let ty = ValType::parse(&ty)?;
+            ctx.pop_operand_expected(Some(ty))?;
+            let t1 = ctx.pop_operand()?;
+            let t2 = ctx.pop_operand_expected(t1)?;
+            ctx.alloc_instr(Select { ty: Some(ty) }, loc);
             ctx.push_operand(t2);
         }
         Operator::Return => {

src/module/mod.rs

@@ -168,6 +168,9 @@ impl Module {
                 }
                 wasmparser::SectionCode::Start => {
                     let idx = section.get_start_section_content()?;
+                    if ret.start.is_some() {
+                        bail!("multiple start sections found");
+                    }
                     ret.start = Some(indices.get_func(idx)?);
                 }
                 wasmparser::SectionCode::Function => {

src/module/tables.rs

@@ -64,7 +64,7 @@ pub struct FunctionTable {
 
     /// Elements of this table which are relative to a global, typically
     /// imported.
-    pub relative_elements: Vec<(GlobalId, Vec<FunctionId>)>,
+    pub relative_elements: Vec<(GlobalId, Vec<Option<FunctionId>>)>,
 }
 
 /// Components of a table of `anyref`

src/passes/used.rs

@@ -174,7 +174,9 @@ impl Used {
                         for (global, list) in list.relative_elements.iter() {
                             stack.push_global(*global);
                             for id in list {
-                                stack.push_func(*id);
+                                if let Some(id) = *id {
+                                    stack.push_func(id);
+                                }
                             }
                         }
                     }

src/passes/validate.rs

@@ -236,4 +236,10 @@ impl<'a> Visitor<'a> for Validate<'a> {
         let width = if e.sixty_four { 8 } else { 4 };
         self.require_atomic(e.memory, &e.arg, width);
     }
+
+    fn visit_global_set(&mut self, e: &GlobalSet) {
+        if !self.module.globals.get(e.global).mutable {
+            self.err("cannot mutate immutable global");
+        }
+    }
 }