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59 changes: 59 additions & 0 deletions
59
core/src/main/java/org/teavm/backend/wasm/debug/CompositeDebugLines.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| /* | ||
| * 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; | ||
|
|
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| import org.teavm.backend.wasm.debug.sourcemap.SourceMapBuilder; | ||
| import org.teavm.model.MethodReference; | ||
|
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| public class CompositeDebugLines implements DebugLines { | ||
| private DebugLines debugLinesBuilder; | ||
| private SourceMapBuilder sourceMapBuilder; | ||
|
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| public CompositeDebugLines(DebugLines debugLinesBuilder, SourceMapBuilder sourceMapBuilder) { | ||
| this.debugLinesBuilder = debugLinesBuilder; | ||
| this.sourceMapBuilder = sourceMapBuilder; | ||
| } | ||
|
|
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| @Override | ||
| public void advance(int ptr) { | ||
| debugLinesBuilder.advance(ptr); | ||
| sourceMapBuilder.advance(ptr); | ||
| } | ||
|
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| @Override | ||
| public void location(String file, int line) { | ||
| debugLinesBuilder.location(file, line); | ||
| sourceMapBuilder.location(file, line); | ||
| } | ||
|
|
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| @Override | ||
| public void emptyLocation() { | ||
| debugLinesBuilder.emptyLocation(); | ||
| sourceMapBuilder.emptyLocation(); | ||
| } | ||
|
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| @Override | ||
| public void start(MethodReference methodReference) { | ||
| debugLinesBuilder.start(methodReference); | ||
| sourceMapBuilder.start(methodReference); | ||
| } | ||
|
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| @Override | ||
| public void end() { | ||
| debugLinesBuilder.end(); | ||
| sourceMapBuilder.end(); | ||
| } | ||
| } |
205 changes: 205 additions & 0 deletions
205
core/src/main/java/org/teavm/backend/wasm/debug/sourcemap/SourceMapBuilder.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,205 @@ | ||
| /* | ||
| * 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.sourcemap; | ||
|
|
||
| import com.carrotsearch.hppc.ObjectIntHashMap; | ||
| import com.carrotsearch.hppc.ObjectIntMap; | ||
| import java.io.IOException; | ||
| import java.io.Writer; | ||
| import java.util.ArrayDeque; | ||
| import java.util.ArrayList; | ||
| import java.util.Deque; | ||
| import java.util.List; | ||
| import java.util.Objects; | ||
| import org.teavm.backend.wasm.debug.DebugLines; | ||
| import org.teavm.common.JsonUtil; | ||
| import org.teavm.debugging.information.SourceFileResolver; | ||
| import org.teavm.model.MethodReference; | ||
|
|
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| public class SourceMapBuilder implements DebugLines { | ||
| private static final String BASE64_CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; | ||
| private List<String> fileNames = new ArrayList<>(); | ||
| private ObjectIntMap<String> fileNameIndexes = new ObjectIntHashMap<>(); | ||
| private int ptr; | ||
| private StringBuilder mappings = new StringBuilder(); | ||
| private String currentFile; | ||
| private int currentLine; | ||
| private String lastWrittenFile; | ||
| private int lastWrittenLine; | ||
| private boolean pendingLocation; | ||
| private Deque<InlineState> inlineStack = new ArrayDeque<>(); | ||
| private List<SourceFileResolver> sourceFileResolvers = new ArrayList<>(); | ||
|
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| private String lastFileInMappings; | ||
| private int lastLineInMappings; | ||
| private int lastPtrInMappings; | ||
|
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| public void addSourceResolver(SourceFileResolver sourceFileResolver) { | ||
| sourceFileResolvers.add(sourceFileResolver); | ||
| } | ||
|
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| public void writeSourceMap(Writer output) throws IOException { | ||
| output.write("{\"version\":3"); | ||
|
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| var files = resolveFiles(); | ||
| if (!files.isEmpty()) { | ||
| var commonPrefix = files.get(0); | ||
| var commonPrefixLength = commonPrefix.length(); | ||
| for (var i = 1; i < files.size(); ++i) { | ||
| var file = files.get(i); | ||
| commonPrefixLength = Math.min(file.length(), commonPrefixLength); | ||
| for (var j = 0; j < commonPrefixLength; ++j) { | ||
| if (commonPrefix.charAt(j) != file.charAt(j)) { | ||
| commonPrefixLength = j; | ||
| break; | ||
| } | ||
| } | ||
| if (commonPrefixLength == 0) { | ||
| break; | ||
| } | ||
| } | ||
| if (commonPrefixLength > 0) { | ||
| for (var i = 0; i < files.size(); ++i) { | ||
| files.set(i, files.get(i).substring(commonPrefixLength)); | ||
| } | ||
| output.write(",\"sourceRoot\":\""); | ||
| JsonUtil.writeEscapedString(output, commonPrefix.substring(0, commonPrefixLength)); | ||
| output.write("\""); | ||
| } | ||
| } | ||
| output.write(",\"sources\":["); | ||
| for (int i = 0; i < files.size(); ++i) { | ||
| if (i > 0) { | ||
| output.write(','); | ||
| } | ||
| output.write("\""); | ||
| var name = files.get(i); | ||
| JsonUtil.writeEscapedString(output, name); | ||
| output.write("\""); | ||
| } | ||
| output.write("]"); | ||
| output.write(",\"names\":[]"); | ||
| output.write(",\"mappings\":\""); | ||
| output.write(mappings.toString()); | ||
| output.write("\"}"); | ||
| } | ||
|
|
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| private List<String> resolveFiles() throws IOException { | ||
| var result = new ArrayList<String>(); | ||
| for (var file : fileNames) { | ||
| var resolvedFile = file; | ||
| for (var resolver : sourceFileResolvers) { | ||
| var candidate = resolver.resolveFile(file); | ||
| if (candidate != null) { | ||
| resolvedFile = candidate; | ||
| break; | ||
| } | ||
| } | ||
| result.add(resolvedFile); | ||
| } | ||
| return result; | ||
| } | ||
|
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| @Override | ||
| public void advance(int ptr) { | ||
| if (ptr != this.ptr) { | ||
| if (pendingLocation) { | ||
| pendingLocation = false; | ||
| if (!Objects.equals(currentFile, lastWrittenFile) || currentLine != lastWrittenLine) { | ||
| lastWrittenFile = currentFile; | ||
| lastWrittenLine = currentLine; | ||
| writeMapping(currentFile, currentLine, this.ptr); | ||
| } | ||
| } | ||
| this.ptr = ptr; | ||
| } | ||
| } | ||
|
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| @Override | ||
| public void location(String file, int line) { | ||
| currentFile = file; | ||
| currentLine = line; | ||
| pendingLocation = true; | ||
| } | ||
|
|
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| @Override | ||
| public void emptyLocation() { | ||
| currentLine = -1; | ||
| currentFile = null; | ||
| pendingLocation = false; | ||
| } | ||
|
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| @Override | ||
| public void start(MethodReference methodReference) { | ||
| inlineStack.push(new InlineState(currentFile, currentLine)); | ||
| } | ||
|
|
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| @Override | ||
| public void end() { | ||
| var state = inlineStack.pop(); | ||
| location(state.file, state.line); | ||
| } | ||
|
|
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| private void writeMapping(String file, int line, int ptr) { | ||
| if (mappings.length() > 0) { | ||
| mappings.append(","); | ||
| } | ||
| writeVLQ(ptr - lastPtrInMappings); | ||
| if (file != null && line > 0) { | ||
| --line; | ||
| var lastFileIndex = fileNameIndexes.get(lastFileInMappings); | ||
| var fileIndex = fileNameIndexes.getOrDefault(file, -1); | ||
| if (fileIndex < 0) { | ||
| fileIndex = fileNames.size(); | ||
| fileNames.add(file); | ||
| fileNameIndexes.put(file, fileIndex); | ||
| } | ||
| writeVLQ(fileIndex - lastFileIndex); | ||
| writeVLQ(line - lastLineInMappings); | ||
| writeVLQ(0); | ||
| lastLineInMappings = line; | ||
| lastFileInMappings = file; | ||
| } | ||
| lastPtrInMappings = ptr; | ||
| } | ||
|
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| private void writeVLQ(int number) { | ||
| if (number < 0) { | ||
| number = ((-number) << 1) | 1; | ||
| } else { | ||
| number = number << 1; | ||
| } | ||
| do { | ||
| int digit = number & 0x1F; | ||
| int next = number >>> 5; | ||
| if (next != 0) { | ||
| digit |= 0x20; | ||
| } | ||
| mappings.append(BASE64_CHARS.charAt(digit)); | ||
| number = next; | ||
| } while (number != 0); | ||
| } | ||
|
|
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| private static class InlineState { | ||
| String file; | ||
| int line; | ||
|
|
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| InlineState(String file, int line) { | ||
| this.file = file; | ||
| this.line = line; | ||
| } | ||
| } | ||
| } |
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