[GR-57593] Implement WebAssembly exception handling proposal.

ci/common.jsonnet

@@ -316,7 +316,7 @@ local common_json = import "../common.json";
 
     wasm:: {
       downloads+: {
-        WABT_DIR: {name: 'wabt', version: '1.0.36', platformspecific: true},
+        WABT_DIR: {name: 'wabt', version: '1.0.37', platformspecific: true},
       },
       environment+: {
         WABT_DIR: '$WABT_DIR/bin',
@@ -325,7 +325,7 @@ local common_json = import "../common.json";
 
     wasm_ol8:: {
       downloads+: {
-        WABT_DIR: {name: 'wabt', version: '1.0.36-ol8', platformspecific: true},
+        WABT_DIR: {name: 'wabt', version: '1.0.37-ol8', platformspecific: true},
       },
       environment+: {
         WABT_DIR: '$WABT_DIR/bin',

wasm/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 This changelog summarizes major changes to the WebAssembly engine implemented in GraalVM (GraalWasm).
 
+## Version 25.1.0
+
+* Implemented the [exception handling](https://github.com/WebAssembly/exception-handling) proposal. This feature can be enabled with the experimental option `wasm.Exceptions=true`.
+
 ## Version 25.0.0
 
 * BREAKING: Changed Context.eval of _wasm_ sources to return a compiled, but not yet instantiated, module object instead of the module instance.
@@ -27,14 +31,13 @@ This changelog summarizes major changes to the WebAssembly engine implemented in
 * Added an implementation of the [SIMD](https://github.com/WebAssembly/simd) proposal using the JDK's Vector API. This improves peak performance when running WebAssembly code which makes heavy use of the new instructions in the SIMD proposal. This new implementation is always used in native image. On the JVM, it is opt-in and requires setting `--add-modules=jdk.incubator.vector`. Use of the incubating Vector API will result in the following warning message being printed to stderr:
   ```
   WARNING: Using incubator modules: jdk.incubator.vector
-   ```
-
+  ```
 
 ## Version 24.2.0
 
 * Updated developer metadata of Maven artifacts.
 * Deprecated the `--wasm.AsyncParsingBinarySize` and `--wasm.AsyncParsingStackSize` options. These options no longer have any effect and will be removed in a future release.
-* Implemented the [Relaxed SIMD](https://github.com/WebAssembly/relaxed-simd) proposal. This feature can be enabled with the options `--wasm.RelaxedSIMD`.
+* Implemented the [Relaxed SIMD](https://github.com/WebAssembly/relaxed-simd) proposal. This feature can be enabled with the option `--wasm.RelaxedSIMD`.
 
 ## Version 24.1.0
 

wasm/docs/contributor/TestsAndBenchmarks.md

@@ -5,7 +5,7 @@
 Building GraalWasm using the `mx build` command will also create the `wasm-tests.jar`, which contains the main test cases.
 To run these tests, the WebAssembly binary toolkit is needed.
 
-1. Download the binary of the [WebAssembly binary toolkit(wabt)](https://github.com/WebAssembly/wabt) and extract it.
+1. Download the binary of the [WebAssembly binary toolkit(wabt)](https://github.com/WebAssembly/wabt) (**1.0.37** or higher) and extract it.
 
 2. Set `WABT_DIR`:
     ```bash

wasm/src/org.graalvm.wasm.test/src/org/graalvm/wasm/test/AbstractBinarySuite.java

@@ -339,6 +339,29 @@ private byte[] generateGlobalSection() {
         }
     }
 
+    private static final class BinaryTags {
+        private final ByteArrayList attributes = new ByteArrayList();
+        private final ByteArrayList typeIndices = new ByteArrayList();
+
+        private void add(byte attribute, byte typeIndex) {
+            attributes.add(attribute);
+            typeIndices.add(typeIndex);
+        }
+
+        private byte[] generateTagSection() {
+            ByteArrayList b = new ByteArrayList();
+            b.add(getByte("0d"));
+            b.add((byte) 0); // length is patched at the end
+            b.add((byte) attributes.size());
+            for (int i = 0; i < attributes.size(); i++) {
+                b.add(attributes.get(i));
+                b.add(typeIndices.get(i));
+            }
+            b.set(1, (byte) (b.size() - 2));
+            return b.toArray();
+        }
+    }
+
     private static final class BinaryCustomSections {
         private final List<byte[]> names = new ArrayList<>();
         private final List<byte[]> sections = new ArrayList<>();
@@ -373,6 +396,7 @@ protected static class BinaryBuilder {
         private final BinaryElements binaryElements = new BinaryElements();
         private final BinaryDatas binaryDatas = new BinaryDatas();
         private final BinaryGlobals binaryGlobals = new BinaryGlobals();
+        private final BinaryTags binaryTags = new BinaryTags();
 
         private final BinaryCustomSections binaryCustomSections = new BinaryCustomSections();
 
@@ -416,6 +440,11 @@ public BinaryBuilder addGlobal(byte mutability, byte valueType, String hexCode)
             return this;
         }
 
+        public BinaryBuilder addTag(byte attribute, byte typeIndex) {
+            binaryTags.add(attribute, typeIndex);
+            return this;
+        }
+
         public BinaryBuilder addCustomSection(String name, byte[] section) {
             binaryCustomSections.add(name, section);
             return this;
@@ -443,8 +472,9 @@ public byte[] build() {
             final byte[] codeSection = binaryFunctions.generateCodeSection();
             final byte[] dataSection = binaryDatas.generateDataSection();
             final byte[] customSections = binaryCustomSections.generateCustomSections();
+            final byte[] tagSection = binaryTags.generateTagSection();
             final int totalLength = preamble.length + typeSection.length + functionSection.length + tableSection.length + memorySection.length + globalSection.length + exportSection.length +
-                            elementSection.length + dataCountSection.length + codeSection.length + dataSection.length + customSections.length;
+                            elementSection.length + dataCountSection.length + codeSection.length + dataSection.length + customSections.length + tagSection.length;
             final byte[] binary = new byte[totalLength];
             int length = 0;
             System.arraycopy(preamble, 0, binary, length, preamble.length);
@@ -457,6 +487,8 @@ public byte[] build() {
             length += tableSection.length;
             System.arraycopy(memorySection, 0, binary, length, memorySection.length);
             length += memorySection.length;
+            System.arraycopy(tagSection, 0, binary, length, tagSection.length);
+            length += tagSection.length;
             System.arraycopy(globalSection, 0, binary, length, globalSection.length);
             length += globalSection.length;
             System.arraycopy(exportSection, 0, binary, length, exportSection.length);

wasm/src/org.graalvm.wasm.test/src/org/graalvm/wasm/test/WasmFileSuite.java

@@ -399,13 +399,17 @@ private WasmTestStatus runTestCase(WasmCase testCase, Engine sharedEngine) {
 
             EnumSet<WasmBinaryTools.WabtOption> options = EnumSet.noneOf(WasmBinaryTools.WabtOption.class);
             String threadsOption = testCase.options().getProperty("wasm.Threads");
-            if (threadsOption != null && threadsOption.equals("true")) {
+            if ("true".equals(threadsOption)) {
                 options.add(WasmBinaryTools.WabtOption.THREADS);
             }
             String multiMemoryOption = testCase.options().getProperty("wasm.MultiMemory");
-            if (multiMemoryOption != null && multiMemoryOption.equals("true")) {
+            if ("true".equals(multiMemoryOption)) {
                 options.add(WasmBinaryTools.WabtOption.MULTI_MEMORY);
             }
+            String exceptionsOption = testCase.options().getProperty("wasm.Exceptions");
+            if ("true".equals(exceptionsOption)) {
+                options.add(WasmBinaryTools.WabtOption.EXCEPTIONS);
+            }
             ArrayList<Source> sources = testCase.getSources(options);
 
             runInContexts(testCase, contextBuilder, sources, sharedEngine, testOut);

wasm/src/org.graalvm.wasm.test/src/org/graalvm/wasm/test/WasmJsApiSuite.java

@@ -854,11 +854,11 @@ public void testExportCountsLimit() throws IOException {
             context.readModule(binaryWithMixedExports, limits);
 
             final int noLimit = Integer.MAX_VALUE;
-            limits = new ModuleLimits(noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, 6, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit);
+            limits = new ModuleLimits(noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, 6, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit);
             context.readModule(binaryWithMixedExports, limits);
 
             try {
-                limits = new ModuleLimits(noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, 5, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit);
+                limits = new ModuleLimits(noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, 5, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit, noLimit);
                 context.readModule(binaryWithMixedExports, limits);
                 Assert.fail("Should have failed - export count exceeds the limit");
             } catch (WasmException ex) {

wasm/src/org.graalvm.wasm.test/src/org/graalvm/wasm/test/WasmTestSuite.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * The Universal Permissive License (UPL), Version 1.0
@@ -50,6 +50,7 @@
 import org.graalvm.wasm.test.suites.bytecode.MultiInstantiationSuite;
 import org.graalvm.wasm.test.suites.control.BlockWithLocalsSuite;
 import org.graalvm.wasm.test.suites.control.BranchBlockSuite;
+import org.graalvm.wasm.test.suites.control.ExceptionSuite;
 import org.graalvm.wasm.test.suites.control.IfThenElseSuite;
 import org.graalvm.wasm.test.suites.control.LoopBlockSuite;
 import org.graalvm.wasm.test.suites.control.MultiValueSuite;
@@ -62,9 +63,9 @@
 import org.graalvm.wasm.test.suites.memory.MemorySuite;
 import org.graalvm.wasm.test.suites.memory.MultiMemorySuite;
 import org.graalvm.wasm.test.suites.memory.ThreadsSuite;
-import org.graalvm.wasm.test.suites.validation.ReferenceTypesValidationSuite;
 import org.graalvm.wasm.test.suites.table.TableSuite;
 import org.graalvm.wasm.test.suites.validation.MultiValueValidationSuite;
+import org.graalvm.wasm.test.suites.validation.ReferenceTypesValidationSuite;
 import org.graalvm.wasm.test.suites.validation.ValidationSuite;
 import org.graalvm.wasm.test.suites.wasi.WasiSuite;
 import org.graalvm.wasm.test.suites.webassembly.EmscriptenSuite;
@@ -105,6 +106,7 @@
                 MultiInstantiationSuite.class,
                 MultiMemorySuite.class,
                 ThreadsSuite.class,
+                ExceptionSuite.class,
                 DebugValidationSuite.class,
                 DebugObjectFactorySuite.class
 })

wasm/src/org.graalvm.wasm.test/src/org/graalvm/wasm/test/suites/bytecode/BytecodeSuite.java

@@ -45,6 +45,7 @@
 
 import org.graalvm.wasm.WasmType;
 import org.graalvm.wasm.constants.Bytecode;
+import org.graalvm.wasm.constants.ExceptionHandlerType;
 import org.graalvm.wasm.constants.SegmentMode;
 import org.graalvm.wasm.parser.bytecode.RuntimeBytecodeGen;
 import org.junit.Assert;
@@ -168,7 +169,7 @@ public void testBrU8Max() {
         expected[255] = (byte) 0xFF;
         test(b -> {
             for (int i = 0; i < 254; i++) {
-                b.add(0);
+                b.addOp(0);
             }
             b.addBranch(0);
         }, expected);
@@ -194,7 +195,7 @@ public void testBrI32MinBackward() {
         expected[259] = (byte) 0xFF;
         test(b -> {
             for (int i = 0; i < 255; i++) {
-                b.add(0);
+                b.addOp(0);
             }
             b.addBranch(0);
         }, expected);
@@ -212,7 +213,7 @@ public void testBrIfU8Max() {
         expected[255] = (byte) 0xFF;
         test(b -> {
             for (int i = 0; i < 254; i++) {
-                b.add(0);
+                b.addOp(0);
             }
             b.addBranchIf(0);
         }, expected);
@@ -238,7 +239,7 @@ public void testBrIfI32MinBackward() {
         expected[259] = (byte) 0xFF;
         test(b -> {
             for (int i = 0; i < 255; i++) {
-                b.add(0);
+                b.addOp(0);
             }
             b.addBranchIf(0);
         }, expected);
@@ -448,52 +449,52 @@ public void testMemoryInstructionInvalidOpcodeI32() {
 
     @Test
     public void testAddMin() {
-        test(b -> b.add(0x00), new byte[]{0x00});
+        test(b -> b.addOp(0x00), new byte[]{0x00});
     }
 
     @Test
     public void testAddMax() {
-        test(b -> b.add(0xFF), new byte[]{(byte) 0xFF});
+        test(b -> b.addOp(0xFF), new byte[]{(byte) 0xFF});
     }
 
     @Test
     public void testInvalidAdd() {
-        testAssertion(b -> b.add(256), "opcode does not fit into byte");
+        testAssertion(b -> b.addOp(256), "opcode does not fit into byte");
     }
 
     @Test
     public void testAddImmediateMin() {
-        test(b -> b.add(0x01, 0), new byte[]{0x01, 0x00, 0x00, 0x00, 0x00});
+        test(b -> b.addOp(0x01, 0), new byte[]{0x01, 0x00, 0x00, 0x00, 0x00});
     }
 
     @Test
     public void testAddImmediateMax() {
-        test(b -> b.add(0x01, 0xFFFFFFFF), new byte[]{0x01, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF});
+        test(b -> b.addOp(0x01, 0xFFFFFFFF), new byte[]{0x01, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF});
     }
 
     @Test
     public void testInvalidAddImmediate() {
-        testAssertion(b -> b.add(256, 0), "opcode does not fit into byte");
+        testAssertion(b -> b.addOp(256, 0), "opcode does not fit into byte");
     }
 
     @Test
     public void testAddImmediate64Max() {
-        test(b -> b.add(0x01, 0xFFFFFFFFFFFFFFFFL), new byte[]{0x01, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF});
+        test(b -> b.addOp(0x01, 0xFFFFFFFFFFFFFFFFL), new byte[]{0x01, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF});
     }
 
     @Test
     public void testInvalidAddImmediate64() {
-        testAssertion(b -> b.add(256, 0xFFL), "opcode does not fit into byte");
+        testAssertion(b -> b.addOp(256, 0xFFL), "opcode does not fit into byte");
     }
 
     @Test
     public void testAddImmediateMax2() {
-        test(b -> b.add(0x01, 0, 0xFFFFFFFF), new byte[]{0x01, 0x00, 0x00, 0x00, 0x00, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF});
+        test(b -> b.addOp(0x01, 0, 0xFFFFFFFF), new byte[]{0x01, 0x00, 0x00, 0x00, 0x00, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF});
     }
 
     @Test
     public void testInvalidAddImmediate2() {
-        testAssertion(b -> b.add(256, 0, 0), "opcode does not fit into byte");
+        testAssertion(b -> b.addOp(256, 0, 0), "opcode does not fit into byte");
     }
 
     @Test
@@ -686,6 +687,11 @@ public void testElemHeaderExternref() {
         test(b -> b.addElemHeader(SegmentMode.ACTIVE, 8, WasmType.EXTERNREF_TYPE, 0, null, -1), new byte[]{0x40, 0x20, 0x08});
     }
 
+    @Test
+    public void testElemHeaderExnref() {
+        test(b -> b.addElemHeader(SegmentMode.ACTIVE, 8, WasmType.EXNREF_TYPE, 0, null, -1), new byte[]{0x40, 0x30, 0x08});
+    }
+
     @Test
     public void testElemHeaderMinU8TableIndex() {
         test(b -> b.addElemHeader(SegmentMode.ACTIVE, 0, WasmType.FUNCREF_TYPE, 1, null, -1), new byte[]{0x50, 0x10, 0x00, 0x01});
@@ -915,4 +921,15 @@ public void testCodeEntryLocals() {
     public void testCodeEntryResults() {
         test(b -> b.addCodeEntry(0, 0, 0, 0, 1), new byte[]{0x05, 0x00});
     }
+
+    @Test
+    public void testCatchExceptionHandler() {
+        test(b -> b.addExceptionHandler(5, 10, ExceptionHandlerType.CATCH, 0, 10), new byte[]{0x05, 0x00, 0x00, 0x00, 0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0A, 0x00, 0x00, 0x00});
+    }
+
+    @Test
+    public void testCatchRefExceptionHandler() {
+        test(b -> b.addExceptionHandler(0, 12, ExceptionHandlerType.CATCH_REF, 1, 256),
+                        new byte[]{0x00, 0x00, 0x00, 0x00, 0x0C, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00});
+    }
 }