wasm gc: more configuration options to set up stack trace deobfuscation

core/src/main/java/org/teavm/backend/wasm/WasmDebugInfoLevel.java

@@ -16,7 +16,6 @@
 package org.teavm.backend.wasm;
 
 public enum WasmDebugInfoLevel {
-    NONE,
     DEOBFUSCATION,
     FULL
 }

core/src/main/java/org/teavm/backend/wasm/WasmGCTarget.java

@@ -76,8 +76,9 @@ public class WasmGCTarget implements TeaVMTarget, TeaVMWasmGCHost {
     private BoundCheckInsertion boundCheckInsertion = new BoundCheckInsertion();
     private boolean strict;
     private boolean obfuscated;
-    private WasmDebugInfoLocation debugLocation;
+    private boolean debugInfo;
-    private WasmDebugInfoLevel debugLevel;
+    private WasmDebugInfoLocation debugLocation = WasmDebugInfoLocation.EXTERNAL;
+    private WasmDebugInfoLevel debugLevel = WasmDebugInfoLevel.FULL;
     private List<WasmGCIntrinsicFactory> intrinsicFactories = new ArrayList<>();
     private Map<MethodReference, WasmGCIntrinsic> customIntrinsics = new HashMap<>();
     private List<WasmGCCustomTypeMapperFactory> customTypeMapperFactories = new ArrayList<>();
@@ -94,11 +95,15 @@ public class WasmGCTarget implements TeaVMTarget, TeaVMWasmGCHost {
         this.strict = strict;
     }
 
-    public void setDebugLevel(WasmDebugInfoLevel debugLevel) {
+    public void setDebugInfo(boolean debug) {
+        this.debugInfo = debug;
+    }
+
+    public void setDebugInfoLevel(WasmDebugInfoLevel debugLevel) {
         this.debugLevel = debugLevel;
     }
 
-    public void setDebugLocation(WasmDebugInfoLocation debugLocation) {
+    public void setDebugInfoLocation(WasmDebugInfoLocation debugLocation) {
         this.debugLocation = debugLocation;
     }
 
@@ -331,7 +336,7 @@ public class WasmGCTarget implements TeaVMTarget, TeaVMWasmGCHost {
             GCDebugInfoBuilder debugInfoBuilder) throws IOException {
         var binaryWriter = new WasmBinaryWriter();
         DebugLines debugLines = null;
-        if (debugLevel != WasmDebugInfoLevel.NONE) {
+        if (debugInfo) {
             debugLines = debugInfoBuilder.lines();
         }
         var binaryRenderer = new WasmBinaryRenderer(binaryWriter, WasmBinaryVersion.V_0x1, obfuscated,
@@ -353,7 +358,7 @@ public class WasmGCTarget implements TeaVMTarget, TeaVMWasmGCHost {
         if (debugLocation == WasmDebugInfoLocation.EXTERNAL) {
             var debugInfoData = ExternalDebugFile.write(debugInfoBuilder.build());
             if (debugInfoData != null) {
-                try (var output = buildTarget.createResource(outputName + ".tdbg")) {
+                try (var output = buildTarget.createResource(outputName + ".teadbg")) {
                     output.write(debugInfoData);
                 }
             }

core/src/main/java/org/teavm/backend/wasm/debug/ExternalDebugFile.java

@@ -16,10 +16,15 @@
 package org.teavm.backend.wasm.debug;
 
 import java.util.List;
+import java.util.function.Function;
 import org.teavm.backend.wasm.model.WasmCustomSection;
+import org.teavm.backend.wasm.parser.AddressListener;
+import org.teavm.backend.wasm.parser.WasmBinaryReader;
 import org.teavm.backend.wasm.render.WasmBinaryWriter;
 
 public final class ExternalDebugFile {
+    private static final int SIGNATURE = 0x67626474;
+
     private ExternalDebugFile() {
     }
 
@@ -28,8 +33,8 @@ public final class ExternalDebugFile {
             return null;
         }
         var writer = new WasmBinaryWriter();
-        writer.writeInt32(0x67626474);
+        writer.writeInt32(SIGNATURE);
-        writer.writeInt32(1);
+        writer.writeLEB(1);
         for (var section : sections) {
             var data = section.getData();
             writer.writeAsciiString(section.getName());
@@ -38,4 +43,29 @@ public final class ExternalDebugFile {
         }
         return writer.getData();
     }
+
+    public static boolean read(byte[] data, Function<String, SectionDataConsumer> consumer) {
+        if (data.length < 4) {
+            return false;
+        }
+        var reader = new WasmBinaryReader(AddressListener.EMPTY, data);
+        var header = reader.readInt32();
+        if (header != SIGNATURE) {
+            return false;
+        }
+        var version = reader.readLEB();
+        if (version != 1) {
+            return false;
+        }
+        while (reader.ptr < data.length) {
+            var name = reader.readString();
+            var length = reader.readLEB();
+            var sectionConsumer = consumer.apply(name);
+            if (sectionConsumer != null) {
+                sectionConsumer.accept(data, reader.ptr, reader.ptr + length);
+            }
+            reader.ptr += length;
+        }
+        return true;
+    }
 }

core/src/main/java/org/teavm/backend/wasm/debug/SectionDataConsumer.java

@@ -0,0 +1,20 @@
+/*
+ *  Copyright 2024 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.backend.wasm.debug;
+
+public interface SectionDataConsumer {
+    void accept(byte[] data, int start, int end);
+}

core/src/main/java/org/teavm/backend/wasm/parser/WasmBinaryReader.java

@@ -173,6 +173,13 @@ public class WasmBinaryReader {
         return result;
     }
 
+    public int readInt32() {
+        return (data[ptr++] & 0xFF)
+                | ((data[ptr++] & 0xFF) << 8)
+                | ((data[ptr++] & 0xFF) << 16)
+                | ((data[ptr++] & 0xFF) << 24);
+    }
+
     public int readFixedInt() {
         return ((data[ptr++] & 0xFF) << 24)
                 | ((data[ptr++] & 0xFF) << 16)

core/src/main/js/wasm-gc-runtime/runtime.js

@@ -425,6 +425,9 @@ function jsoImports(imports, context) {
             Object.defineProperty(cls, name, descriptor);
         },
         javaObjectToJS(instance, cls) {
+            if (instance === null) {
+                return null;
+            }
             let existing = jsWrappers.get(instance);
             if (typeof existing != "undefined") {
                 let result = existing.deref();
@@ -604,14 +607,18 @@ async function load(path, options) {
         options.installImports(importObj);
     }
 
-    let [deobfuscatorFactory, { module, instance }] = await Promise.all([
+    let deobfuscatorOptions = options.stackDeobfuscator || {};
-        options.attachStackDeobfuscator ? getDeobfuscator(path, options) : Promise.resolve(null),
+    let debugInfoLocation = deobfuscatorOptions.infoLocation || "auto";
-        WebAssembly.instantiateStreaming(fetch(path), importObj)
+    let [deobfuscatorFactory, { module, instance }, debugInfo] = await Promise.all([
+        deobfuscatorOptions.enabled ? getDeobfuscator(path, deobfuscatorOptions) : Promise.resolve(null),
+        WebAssembly.instantiateStreaming(fetch(path), importObj),
+        fetchExternalDebugInfo(path, debugInfoLocation, deobfuscatorOptions)
     ]);
 
     defaultsResult.supplyExports(instance.exports);
     if (deobfuscatorFactory) {
-        let deobfuscator = createDeobfuscator(module, deobfuscatorFactory);
+        let moduleToPass = debugInfoLocation === "auto" || debugInfoLocation === "embedded" ? module : null;
+        let deobfuscator = createDeobfuscator(moduleToPass, debugInfo, deobfuscatorFactory);
         if (deobfuscator !== null) {
             defaultsResult.supplyStackDeobfuscator(deobfuscator);
         }
@@ -637,7 +644,8 @@ async function getDeobfuscator(path, options) {
     try {
         const importObj = {};
         const defaultsResult = defaults(importObj, {});
-        const { instance } = await WebAssembly.instantiateStreaming(fetch(path + "-deobfuscator.wasm"), importObj);
+        const deobfuscatorPath = options.path || path + "-deobfuscator.wasm";
+        const { instance } = await WebAssembly.instantiateStreaming(fetch(deobfuscatorPath), importObj);
         defaultsResult.supplyExports(instance.exports)
         return instance;
     } catch (e) {
@@ -646,16 +654,25 @@ async function getDeobfuscator(path, options) {
     }
 }
 
-function createDeobfuscator(module, deobfuscatorFactory) {
+function createDeobfuscator(module, externalData, deobfuscatorFactory) {
     let deobfuscator = null;
     let deobfuscatorInitialized = false;
     function ensureDeobfuscator() {
         if (!deobfuscatorInitialized) {
             deobfuscatorInitialized = true;
-            try {
+            if (externalData !== null) {
-                deobfuscator = deobfuscatorFactory.exports.createForModule.value(module);
+                try {
-            } catch (e) {
+                    deobfuscator = deobfuscatorFactory.exports.createFromExternalFile.value(externalData);
-                console.warn("Could not load create deobfuscator", e);
+                } catch (e) {
+                    console.warn("Could not load create deobfuscator", e);
+                }
+            }
+            if (deobfuscator == null && module !== null) {
+                try {
+                    deobfuscator = deobfuscatorFactory.exports.createForModule.value(module);
+                } catch (e) {
+                    console.warn("Could not create deobfuscator from module data", e);
+                }
             }
         }
     }
@@ -663,4 +680,19 @@ function createDeobfuscator(module, deobfuscatorFactory) {
         ensureDeobfuscator();
         return deobfuscator !== null ? deobfuscator.deobfuscate(addresses) : [];
     }
+}
+
+async function fetchExternalDebugInfo(path, debugInfoLocation, options) {
+    if (!options.enabled) {
+        return null;
+    }
+    if (debugInfoLocation !== "auto" && debugInfoLocation !== "external") {
+        return null;
+    }
+    let location = options.externalInfoPath || path + ".teadbg";
+    let response = await fetch(location);
+    if (!response.ok) {
+        return null;
+    }
+    return new Int8Array(await response.arrayBuffer());
 }

tests/src/test/java/org/teavm/jso/export/ExportTest.java

@@ -171,8 +171,8 @@ public class ExportTest {
         try {
             var wasmGCTarget = new WasmGCTarget();
             wasmGCTarget.setObfuscated(false);
-            wasmGCTarget.setDebugLocation(WasmDebugInfoLocation.EMBEDDED);
+            wasmGCTarget.setDebugInfoLocation(WasmDebugInfoLocation.EMBEDDED);
-            wasmGCTarget.setDebugLevel(WasmDebugInfoLevel.DEOBFUSCATION);
+            wasmGCTarget.setDebugInfoLevel(WasmDebugInfoLevel.DEOBFUSCATION);
             var teavm = new TeaVMBuilder(wasmGCTarget).build();
             var outputDir = new File(wasmGCTargetFile, name);
             teavm.installPlugins();

tools/browser-runner/src/main/resources/test-server/frame.js

@@ -211,7 +211,9 @@ function launchWasmGCTest(file, argument, callback) {
     }
 
     TeaVM.wasmGC.load(file.path, {
-        attachStackDeobfuscator: true,
+        stackDeobfuscator: {
+            enabled: true
+        },
         installImports: function(o) {
             o.teavmConsole.putcharStdout = putchar;
             o.teavmConsole.putcharStderr = putcharStderr;

tools/core/src/main/java/org/teavm/tooling/TeaVMTool.java

@@ -38,6 +38,8 @@ import org.teavm.backend.c.generate.ShorteningFileNameProvider;
 import org.teavm.backend.c.generate.SimpleFileNameProvider;
 import org.teavm.backend.javascript.JSModuleType;
 import org.teavm.backend.javascript.JavaScriptTarget;
+import org.teavm.backend.wasm.WasmDebugInfoLevel;
+import org.teavm.backend.wasm.WasmDebugInfoLocation;
 import org.teavm.backend.wasm.WasmGCTarget;
 import org.teavm.backend.wasm.WasmRuntimeType;
 import org.teavm.backend.wasm.WasmTarget;
@@ -108,6 +110,8 @@ public class TeaVMTool {
     private JavaScriptTarget javaScriptTarget;
     private WasmTarget webAssemblyTarget;
     private WasmBinaryVersion wasmVersion = WasmBinaryVersion.V_0x1;
+    private WasmDebugInfoLocation wasmDebugInfoLocation = WasmDebugInfoLocation.EXTERNAL;
+    private WasmDebugInfoLevel wasmDebugInfoLevel = WasmDebugInfoLevel.DEOBFUSCATION;
     private boolean wasmExceptionsUsed;
     private CTarget cTarget;
     private Set<File> generatedFiles = new HashSet<>();
@@ -281,6 +285,14 @@ public class TeaVMTool {
         this.wasmExceptionsUsed = wasmExceptionsUsed;
     }
 
+    public void setWasmDebugInfoLocation(WasmDebugInfoLocation wasmDebugInfoLocation) {
+        this.wasmDebugInfoLocation = wasmDebugInfoLocation;
+    }
+
+    public void setWasmDebugInfoLevel(WasmDebugInfoLevel wasmDebugInfoLevel) {
+        this.wasmDebugInfoLevel = wasmDebugInfoLevel;
+    }
+
     public void setHeapDump(boolean heapDump) {
         this.heapDump = heapDump;
     }
@@ -388,6 +400,9 @@ public class TeaVMTool {
         var target = new WasmGCTarget();
         target.setObfuscated(obfuscated);
         target.setStrict(strict);
+        target.setDebugInfo(debugInformationGenerated);
+        target.setDebugInfoLevel(debugInformationGenerated ? WasmDebugInfoLevel.FULL : wasmDebugInfoLevel);
+        target.setDebugInfoLocation(wasmDebugInfoLocation);
         return target;
     }
 

tools/core/src/main/java/org/teavm/tooling/builder/BuildStrategy.java

@@ -18,6 +18,8 @@ package org.teavm.tooling.builder;
 import java.util.List;
 import java.util.Properties;
 import org.teavm.backend.javascript.JSModuleType;
+import org.teavm.backend.wasm.WasmDebugInfoLevel;
+import org.teavm.backend.wasm.WasmDebugInfoLocation;
 import org.teavm.backend.wasm.render.WasmBinaryVersion;
 import org.teavm.tooling.TeaVMSourceFilePolicy;
 import org.teavm.tooling.TeaVMTargetType;
@@ -83,6 +85,10 @@ public interface BuildStrategy {
 
     void setWasmExceptionsUsed(boolean wasmExceptionsUsed);
 
+    void setWasmDebugInfoLevel(WasmDebugInfoLevel wasmDebugInfoLevel);
+
+    void setWasmDebugInfoLocation(WasmDebugInfoLocation wasmDebugInfoLocation);
+
     void setMinHeapSize(int minHeapSize);
 
     void setMaxHeapSize(int maxHeapSize);

tools/core/src/main/java/org/teavm/tooling/builder/InProcessBuildStrategy.java

@@ -25,6 +25,8 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.Properties;
 import org.teavm.backend.javascript.JSModuleType;
+import org.teavm.backend.wasm.WasmDebugInfoLevel;
+import org.teavm.backend.wasm.WasmDebugInfoLocation;
 import org.teavm.backend.wasm.render.WasmBinaryVersion;
 import org.teavm.callgraph.CallGraph;
 import org.teavm.diagnostics.ProblemProvider;
@@ -62,6 +64,8 @@ public class InProcessBuildStrategy implements BuildStrategy {
     private String[] classesToPreserve = new String[0];
     private WasmBinaryVersion wasmVersion = WasmBinaryVersion.V_0x1;
     private boolean wasmExceptionsUsed;
+    private WasmDebugInfoLevel wasmDebugInfoLevel;
+    private WasmDebugInfoLocation wasmDebugInfoLocation;
     private int minHeapSize = 4 * 1024 * 1024;
     private int maxHeapSize = 128 * 1024 * 1024;
     private final List<SourceFileProvider> sourceFileProviders = new ArrayList<>();
@@ -219,6 +223,16 @@ public class InProcessBuildStrategy implements BuildStrategy {
         this.wasmExceptionsUsed = wasmExceptionsUsed;
     }
 
+    @Override
+    public void setWasmDebugInfoLevel(WasmDebugInfoLevel wasmDebugInfoLevel) {
+        this.wasmDebugInfoLevel = wasmDebugInfoLevel;
+    }
+
+    @Override
+    public void setWasmDebugInfoLocation(WasmDebugInfoLocation wasmDebugInfoLocation) {
+        this.wasmDebugInfoLocation = wasmDebugInfoLocation;
+    }
+
     @Override
     public void setMinHeapSize(int minHeapSize) {
         this.minHeapSize = minHeapSize;
@@ -273,6 +287,8 @@ public class InProcessBuildStrategy implements BuildStrategy {
         tool.setCacheDirectory(cacheDirectory != null ? new File(cacheDirectory) : null);
         tool.setWasmVersion(wasmVersion);
         tool.setWasmExceptionsUsed(wasmExceptionsUsed);
+        tool.setWasmDebugInfoLevel(wasmDebugInfoLevel);
+        tool.setWasmDebugInfoLocation(wasmDebugInfoLocation);
         tool.setMinHeapSize(minHeapSize);
         tool.setMaxHeapSize(maxHeapSize);
         tool.setHeapDump(heapDump);

tools/core/src/main/java/org/teavm/tooling/builder/RemoteBuildStrategy.java

@@ -20,6 +20,8 @@ import java.rmi.server.UnicastRemoteObject;
 import java.util.List;
 import java.util.Properties;
 import org.teavm.backend.javascript.JSModuleType;
+import org.teavm.backend.wasm.WasmDebugInfoLevel;
+import org.teavm.backend.wasm.WasmDebugInfoLocation;
 import org.teavm.backend.wasm.render.WasmBinaryVersion;
 import org.teavm.callgraph.CallGraph;
 import org.teavm.diagnostics.Problem;
@@ -192,6 +194,16 @@ public class RemoteBuildStrategy implements BuildStrategy {
         request.wasmExceptionsUsed = wasmExceptionsUsed;
     }
 
+    @Override
+    public void setWasmDebugInfoLevel(WasmDebugInfoLevel wasmDebugInfoLevel) {
+        request.wasmDebugInfoLevel = wasmDebugInfoLevel;
+    }
+
+    @Override
+    public void setWasmDebugInfoLocation(WasmDebugInfoLocation wasmDebugInfoLocation) {
+        request.wasmDebugInfoLocation = wasmDebugInfoLocation;
+    }
+
     @Override
     public void setMinHeapSize(int minHeapSize) {
         request.minHeapSize = minHeapSize;

tools/core/src/main/java/org/teavm/tooling/daemon/BuildDaemon.java

@@ -162,6 +162,8 @@ public class BuildDaemon extends UnicastRemoteObject implements RemoteBuildServi
         tool.setStrict(request.strict);
         tool.setWasmVersion(request.wasmVersion);
         tool.setWasmExceptionsUsed(request.wasmExceptionsUsed);
+        tool.setWasmDebugInfoLocation(request.wasmDebugInfoLocation);
+        tool.setWasmDebugInfoLevel(request.wasmDebugInfoLevel);
         tool.setMinHeapSize(request.minHeapSize);
         tool.setMaxHeapSize(request.maxHeapSize);
         tool.setHeapDump(request.heapDump);

tools/core/src/main/java/org/teavm/tooling/daemon/RemoteBuildRequest.java

@@ -20,6 +20,8 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.Properties;
 import org.teavm.backend.javascript.JSModuleType;
+import org.teavm.backend.wasm.WasmDebugInfoLevel;
+import org.teavm.backend.wasm.WasmDebugInfoLocation;
 import org.teavm.backend.wasm.render.WasmBinaryVersion;
 import org.teavm.tooling.TeaVMSourceFilePolicy;
 import org.teavm.tooling.TeaVMTargetType;
@@ -50,6 +52,8 @@ public class RemoteBuildRequest implements Serializable {
     public boolean fastDependencyAnalysis;
     public WasmBinaryVersion wasmVersion;
     public boolean wasmExceptionsUsed;
+    public WasmDebugInfoLocation wasmDebugInfoLocation;
+    public WasmDebugInfoLevel wasmDebugInfoLevel;
     public int minHeapSize;
     public int maxHeapSize;
     public boolean heapDump;

tools/deobfuscator-wasm-gc/src/main/java/org/teavm/tooling/deobfuscate/wasmgc/Compiler.java

@@ -43,6 +43,7 @@ public final class Compiler {
         tool.setTargetFileName(args[2]);
         tool.setObfuscated(true);
         tool.setOptimizationLevel(TeaVMOptimizationLevel.ADVANCED);
+        tool.setStrict(false);
 
         tool.generate();
         TeaVMProblemRenderer.describeProblems(tool.getDependencyInfo().getCallGraph(), tool.getProblemProvider(), log);

tools/deobfuscator-wasm-gc/src/main/java/org/teavm/tooling/deobfuscate/wasmgc/DeobfuscatorFactory.java

@@ -15,6 +15,8 @@
  */
 package org.teavm.tooling.deobfuscate.wasmgc;
 
+import java.util.Arrays;
+import org.teavm.backend.wasm.debug.ExternalDebugFile;
 import org.teavm.backend.wasm.debug.parser.LinesDeobfuscationParser;
 import org.teavm.jso.JSBody;
 import org.teavm.jso.JSExport;
@@ -42,9 +44,29 @@ public final class DeobfuscatorFactory {
             }
             return bytes;
         });
-        return new Deobfuscator(parser.getLineInfo());
+        var lineInfo = parser.getLineInfo();
+        return lineInfo != null ? new Deobfuscator(parser.getLineInfo()) : null;
     }
 
     @JSBody(params = { "module", "name"}, script = "return WebAssembly.Module.customSections(module, name);")
     private static native JSArrayReader<ArrayBuffer> getSection(JSObject module, String name);
+
+    @JSExport
+    public static Deobfuscator createFromExternalFile(byte[] data) {
+        var parser = new LinesDeobfuscationParser();
+        var success = ExternalDebugFile.read(data, sectionName -> {
+            if (!parser.canHandleSection(sectionName)) {
+                return null;
+            }
+            return (bytes, start, end) -> parser.applySection(sectionName, Arrays.copyOfRange(bytes, start, end));
+        });
+        if (!success) {
+            return null;
+        }
+        var lineInfo = parser.getLineInfo();
+        if (lineInfo == null) {
+            return null;
+        }
+        return new Deobfuscator(lineInfo);
+    }
 }

tools/gradle/src/main/java/org/teavm/gradle/TeaVMExtensionImpl.java

@@ -31,6 +31,8 @@ import org.teavm.gradle.api.TeaVMJSConfiguration;
 import org.teavm.gradle.api.TeaVMWasiConfiguration;
 import org.teavm.gradle.api.TeaVMWasmConfiguration;
 import org.teavm.gradle.api.TeaVMWasmGCConfiguration;
+import org.teavm.gradle.api.WasmDebugInfoLevel;
+import org.teavm.gradle.api.WasmDebugInfoLocation;
 
 class TeaVMExtensionImpl extends TeaVMBaseExtensionImpl implements TeaVMExtension {
     private TeaVMJSConfiguration js;
@@ -111,6 +113,12 @@ class TeaVMExtensionImpl extends TeaVMBaseExtensionImpl implements TeaVMExtensio
         wasmGC.getCopyRuntime().convention(property("wasm-gc.copyRuntime").map(Boolean::parseBoolean).orElse(true));
         wasmGC.getObfuscated().convention(property("wasm-gc.obfuscated").map(Boolean::parseBoolean).orElse(true));
         wasmGC.getDisassembly().convention(property("wasm-gc.disassembly").map(Boolean::parseBoolean).orElse(false));
+        wasmGC.getDebugInformation().convention(property("wasm-gc.debugInformation").map(Boolean::parseBoolean)
+                .orElse(false));
+        wasmGC.getDebugInfoLocation().convention(property("wasm-gc.debugInformation.location")
+                .map(v -> WasmDebugInfoLocation.valueOf(v.toUpperCase())).orElse(WasmDebugInfoLocation.EXTERNAL));
+        wasmGC.getDebugInfoLevel().convention(property("wasm-gc.debugInformation.level")
+                .map(v -> WasmDebugInfoLevel.valueOf(v.toUpperCase())).orElse(WasmDebugInfoLevel.DEOBFUSCATION));
     }
 
     private void setupWasiDefaults() {

tools/gradle/src/main/java/org/teavm/gradle/api/TeaVMWasmGCConfiguration.java

@@ -27,4 +27,8 @@ public interface TeaVMWasmGCConfiguration extends TeaVMCommonConfiguration, TeaV
     Property<Boolean> getDisassembly();
 
     Property<String> getTargetFileName();
+
+    Property<WasmDebugInfoLocation> getDebugInfoLocation();
+
+    Property<WasmDebugInfoLevel> getDebugInfoLevel();
 }

tools/gradle/src/main/java/org/teavm/gradle/api/WasmDebugInfoLevel.java

@@ -0,0 +1,21 @@
+/*
+ *  Copyright 2024 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.gradle.api;
+
+public enum WasmDebugInfoLevel {
+    DEOBFUSCATION,
+    FULL
+}

tools/gradle/src/main/java/org/teavm/gradle/api/WasmDebugInfoLocation.java

@@ -0,0 +1,21 @@
+/*
+ *  Copyright 2024 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.gradle.api;
+
+public enum WasmDebugInfoLocation {
+    EMBEDDED,
+    EXTERNAL
+}

tools/gradle/src/main/java/org/teavm/gradle/tasks/GenerateWasmGCTask.java

@@ -17,6 +17,8 @@ package org.teavm.gradle.tasks;
 
 import org.gradle.api.provider.Property;
 import org.gradle.api.tasks.Input;
+import org.teavm.gradle.api.WasmDebugInfoLevel;
+import org.teavm.gradle.api.WasmDebugInfoLocation;
 import org.teavm.tooling.TeaVMTargetType;
 import org.teavm.tooling.builder.BuildStrategy;
 
@@ -24,6 +26,9 @@ public abstract class GenerateWasmGCTask extends TeaVMTask {
     public GenerateWasmGCTask() {
         getStrict().convention(true);
         getObfuscated().convention(true);
+        getDebugInfo().convention(true);
+        getDebugInfoLevel().convention(WasmDebugInfoLevel.DEOBFUSCATION);
+        getDebugInfoLocation().convention(WasmDebugInfoLocation.EXTERNAL);
     }
 
     @Input
@@ -32,10 +37,36 @@ public abstract class GenerateWasmGCTask extends TeaVMTask {
     @Input
     public abstract Property<Boolean> getObfuscated();
 
+    @Input
+    public abstract Property<Boolean> getDebugInfo();
+
+    @Input
+    public abstract Property<WasmDebugInfoLevel> getDebugInfoLevel();
+
+    @Input
+    public abstract Property<WasmDebugInfoLocation> getDebugInfoLocation();
+
     @Override
     protected void setupBuilder(BuildStrategy builder) {
         builder.setStrict(getStrict().get());
         builder.setObfuscated(getObfuscated().get());
+        builder.setDebugInformationGenerated(getDebugInfo().get());
+        switch (getDebugInfoLevel().get()) {
+            case FULL:
+                builder.setWasmDebugInfoLevel(org.teavm.backend.wasm.WasmDebugInfoLevel.FULL);
+                break;
+            case DEOBFUSCATION:
+                builder.setWasmDebugInfoLevel(org.teavm.backend.wasm.WasmDebugInfoLevel.DEOBFUSCATION);
+                break;
+        }
+        switch (getDebugInfoLocation().get()) {
+            case EMBEDDED:
+                builder.setWasmDebugInfoLocation(org.teavm.backend.wasm.WasmDebugInfoLocation.EMBEDDED);
+                break;
+            case EXTERNAL:
+                builder.setWasmDebugInfoLocation(org.teavm.backend.wasm.WasmDebugInfoLocation.EXTERNAL);
+                break;
+        }
         builder.setTargetType(TeaVMTargetType.WEBASSEMBLY_GC);
     }
 }

tools/junit/src/main/java/org/teavm/junit/WebAssemblyGCPlatformSupport.java

@@ -71,8 +71,9 @@ class WebAssemblyGCPlatformSupport extends TestPlatformSupport<WasmGCTarget> {
             var target = new WasmGCTarget();
             target.setObfuscated(false);
             target.setStrict(true);
-            target.setDebugLevel(WasmDebugInfoLevel.DEOBFUSCATION);
+            target.setDebugInfo(true);
-            target.setDebugLocation(WasmDebugInfoLocation.EMBEDDED);
+            target.setDebugInfoLevel(WasmDebugInfoLevel.DEOBFUSCATION);
+            target.setDebugInfoLocation(WasmDebugInfoLocation.EMBEDDED);
             var sourceDirs = System.getProperty(SOURCE_DIRS);
             if (sourceDirs != null) {
                 var dirs = new ArrayList<File>();

tools/junit/src/main/resources/teavm-run-test-wasm-gc.html

@@ -25,7 +25,9 @@
     <script type="text/javascript">
         let instance;
         TeaVM.wasmGC.load("${SCRIPT}", {
-            attachStackDeobfuscator: true,
+            stackDeobfuscator: {
+                enabled: true
+            },
             installImports(o) {
                 o.teavmTest = {
                     success() {