| // Copyright (c) 2016, the R8 project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| package com.android.tools.r8.naming; |
| |
| import com.android.tools.r8.DiagnosticsHandler; |
| import com.android.tools.r8.naming.ClassNamingForNameMapper.MappedRange; |
| import com.android.tools.r8.naming.MemberNaming.FieldSignature; |
| import com.android.tools.r8.naming.MemberNaming.MethodSignature; |
| import com.android.tools.r8.naming.MemberNaming.Signature; |
| import com.android.tools.r8.naming.PositionRangeAllocator.CardinalPositionRangeAllocator; |
| import com.android.tools.r8.naming.PositionRangeAllocator.NonCardinalPositionRangeAllocator; |
| import com.android.tools.r8.naming.mappinginformation.MapVersionMappingInformation; |
| import com.android.tools.r8.naming.mappinginformation.MappingInformation; |
| import com.android.tools.r8.naming.mappinginformation.MappingInformation.ReferentialMappingInformation; |
| import com.android.tools.r8.naming.mappinginformation.MappingInformationDiagnostics; |
| import com.android.tools.r8.naming.mappinginformation.ResidualSignatureMappingInformation; |
| import com.android.tools.r8.naming.mappinginformation.ResidualSignatureMappingInformation.ResidualFieldSignatureMappingInformation; |
| import com.android.tools.r8.naming.mappinginformation.ResidualSignatureMappingInformation.ResidualMethodSignatureMappingInformation; |
| import com.android.tools.r8.position.Position; |
| import com.android.tools.r8.utils.ArrayUtils; |
| import com.android.tools.r8.utils.BooleanBox; |
| import com.android.tools.r8.utils.Box; |
| import com.android.tools.r8.utils.DescriptorUtils; |
| import com.android.tools.r8.utils.IdentifierUtils; |
| import com.android.tools.r8.utils.StringUtils; |
| import com.google.gson.JsonObject; |
| import com.google.gson.JsonParser; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Objects; |
| import java.util.function.Consumer; |
| import java.util.function.Function; |
| |
| /** |
| * Parses a Proguard mapping file and produces mappings from obfuscated class names to the original |
| * name and from obfuscated member signatures to the original members the obfuscated member |
| * was formed of. |
| * <p> |
| * The expected format is as follows |
| * <p> |
| * original-type-name ARROW obfuscated-type-name COLON starts a class mapping |
| * description and maps original to obfuscated. |
| * <p> |
| * followed by one or more of |
| * <p> |
| * signature ARROW name |
| * <p> |
| * which maps the member with the given signature to the new name. This mapping is not |
| * bidirectional as member names are overloaded by signature. To make it bidirectional, we extend |
| * the name with the signature of the original member. |
| * <p> |
| * Due to inlining, we might have the above prefixed with a range (two numbers separated by :). |
| * <p> |
| * range COLON signature ARROW name |
| * <p> |
| * This has the same meaning as the above but also encodes the line number range of the member. This |
| * may be followed by multiple inline mappings of the form |
| * <p> |
| * range COLON signature COLON range ARROW name |
| * <p> |
| * to identify that signature was inlined from the second range to the new line numbers in the first |
| * range. This is then followed by information on the call trace to where the member was inlined. |
| * These entries have the form |
| * <p> |
| * range COLON signature COLON number ARROW name |
| * <p> |
| * and are currently only stored to be able to reproduce them later. |
| */ |
| public class ProguardMapReader implements AutoCloseable { |
| |
| private final LineReader reader; |
| private final JsonParser jsonParser = new JsonParser(); |
| private final DiagnosticsHandler diagnosticsHandler; |
| private final boolean allowEmptyMappedRanges; |
| private final boolean allowExperimentalMapping; |
| private boolean seenClassMapping = false; |
| |
| private final CardinalPositionRangeAllocator cardinalRangeCache = |
| PositionRangeAllocator.createCardinalPositionRangeAllocator(); |
| private final NonCardinalPositionRangeAllocator nonCardinalRangeCache = |
| PositionRangeAllocator.createNonCardinalPositionRangeAllocator(); |
| |
| @Override |
| public void close() throws IOException { |
| reader.close(); |
| } |
| |
| ProguardMapReader( |
| LineReader reader, |
| DiagnosticsHandler diagnosticsHandler, |
| boolean allowEmptyMappedRanges, |
| boolean allowExperimentalMapping) { |
| this( |
| reader, |
| diagnosticsHandler, |
| allowEmptyMappedRanges, |
| allowExperimentalMapping, |
| MapVersion.MAP_VERSION_NONE); |
| } |
| |
| ProguardMapReader( |
| LineReader reader, |
| DiagnosticsHandler diagnosticsHandler, |
| boolean allowEmptyMappedRanges, |
| boolean allowExperimentalMapping, |
| MapVersion mapVersion) { |
| this.reader = reader; |
| this.diagnosticsHandler = diagnosticsHandler; |
| this.allowEmptyMappedRanges = allowEmptyMappedRanges; |
| this.allowExperimentalMapping = allowExperimentalMapping; |
| this.version = mapVersion; |
| assert reader != null; |
| assert diagnosticsHandler != null; |
| } |
| |
| // Internal parser state |
| private int lineNo = 0; |
| private int lineOffset = 0; |
| private String line; |
| private MapVersion version; |
| |
| private int peekCodePoint() { |
| return lineOffset < line.length() ? line.codePointAt(lineOffset) : '\n'; |
| } |
| |
| private char peekChar(int distance) { |
| return lineOffset + distance < line.length() |
| ? line.charAt(lineOffset + distance) |
| : '\n'; |
| } |
| |
| private boolean hasNext() { |
| return lineOffset < line.length(); |
| } |
| |
| private int nextCodePoint() { |
| try { |
| int cp = line.codePointAt(lineOffset); |
| lineOffset += Character.charCount(cp); |
| return cp; |
| } catch (ArrayIndexOutOfBoundsException e) { |
| throw new ParseException("Unexpected end of line"); |
| } |
| } |
| |
| private char nextChar() { |
| assert hasNext(); |
| try { |
| return line.charAt(lineOffset++); |
| } catch (ArrayIndexOutOfBoundsException e) { |
| throw new ParseException("Unexpected end of line"); |
| } |
| } |
| |
| private boolean nextLine(ProguardMap.Builder mapBuilder) throws IOException { |
| if (line.length() != lineOffset) { |
| throw new ParseException("Expected end of line"); |
| } |
| return skipLine(mapBuilder); |
| } |
| |
| private boolean isEmptyOrCommentLine(String line) { |
| if (line == null) { |
| return true; |
| } |
| for (int i = 0; i < line.length(); ++i) { |
| char c = line.charAt(i); |
| if (c == '#') { |
| return !hasFirstCharJsonBrace(line, i); |
| } else if (!StringUtils.isWhitespace(c)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| private boolean isCommentLineWithJsonBrace() { |
| if (line == null) { |
| return false; |
| } |
| for (int i = 0; i < line.length(); ++i) { |
| char c = line.charAt(i); |
| if (c == '#') { |
| return hasFirstCharJsonBrace(line, i); |
| } else if (!Character.isWhitespace(c)) { |
| return false; |
| } |
| } |
| return false; |
| } |
| |
| private static boolean hasFirstCharJsonBrace(String line, int commentCharIndex) { |
| for (int i = commentCharIndex + 1; i < line.length(); i++) { |
| char c = line.charAt(i); |
| if (c == '{') { |
| return true; |
| } else if (!Character.isWhitespace(c)) { |
| return false; |
| } |
| } |
| return false; |
| } |
| |
| private boolean skipLine(ProguardMap.Builder mapBuilder) throws IOException { |
| lineOffset = 0; |
| boolean isEmptyOrCommentLine; |
| do { |
| line = reader.readLine(); |
| lineNo++; |
| isEmptyOrCommentLine = isEmptyOrCommentLine(line); |
| if (!seenClassMapping && isEmptyOrCommentLine) { |
| mapBuilder.addPreambleLine(line); |
| } |
| } while (hasLine() && isEmptyOrCommentLine); |
| return hasLine(); |
| } |
| |
| private boolean hasLine() { |
| return line != null; |
| } |
| |
| // Helpers for common pattern |
| private void skipWhitespace() { |
| while (hasNext() && StringUtils.isWhitespace(peekCodePoint())) { |
| nextCodePoint(); |
| } |
| } |
| |
| private void expectWhitespace() { |
| boolean seen = false; |
| while (hasNext() && StringUtils.isWhitespace(peekCodePoint())) { |
| seen = seen || !StringUtils.isBOM(peekCodePoint()); |
| nextCodePoint(); |
| } |
| if (!seen) { |
| throw new ParseException("Expected whitespace", true); |
| } |
| } |
| |
| private void expect(char c) { |
| if (!hasNext()) { |
| throw new ParseException("Expected '" + c + "'", true); |
| } |
| if (nextChar() != c) { |
| throw new ParseException("Expected '" + c + "'"); |
| } |
| } |
| |
| void parse(ProguardMap.Builder mapBuilder) throws IOException { |
| // Read the first line. |
| skipLine(mapBuilder); |
| parseClassMappings(mapBuilder); |
| } |
| |
| // Parsing of entries |
| |
| private void parseClassMappings(ProguardMap.Builder mapBuilder) throws IOException { |
| while (hasLine()) { |
| skipWhitespace(); |
| if (isCommentLineWithJsonBrace()) { |
| if (!parseMappingInformation( |
| info -> { |
| assert info.isMapVersionMappingInformation() |
| || info.isUnknownJsonMappingInformation(); |
| if (info.isMapVersionMappingInformation()) { |
| mapBuilder.setCurrentMapVersion(info.asMapVersionMappingInformation()); |
| } else if (!seenClassMapping) { |
| mapBuilder.addPreambleLine(line); |
| } |
| })) { |
| if (!seenClassMapping) { |
| mapBuilder.addPreambleLine(line); |
| } |
| } |
| // Skip reading the rest of the line. |
| lineOffset = line.length(); |
| nextLine(mapBuilder); |
| continue; |
| } |
| String before = parseType(false); |
| skipWhitespace(); |
| // Workaround for proguard map files that contain entries for package-info.java files. |
| assert IdentifierUtils.isDexIdentifierPart('-'); |
| if (before.endsWith("-") && acceptString(">")) { |
| // With - as a legal identifier part the grammar is ambiguous, and we treat a->b as a -> b, |
| // and not as a- > b (which would be a parse error). |
| before = before.substring(0, before.length() - 1); |
| } else { |
| skipWhitespace(); |
| acceptArrow(); |
| } |
| skipWhitespace(); |
| String after = parseType(false); |
| skipWhitespace(); |
| expect(':'); |
| seenClassMapping = true; |
| ClassNaming.Builder currentClassBuilder = |
| mapBuilder.classNamingBuilder(after, before, getPosition()); |
| skipWhitespace(); |
| if (nextLine(mapBuilder)) { |
| parseMemberMappings(mapBuilder, currentClassBuilder); |
| } |
| } |
| } |
| |
| private boolean parseMappingInformation(Consumer<MappingInformation> onMappingInfo) { |
| JsonObject object = parseJsonInComment(); |
| if (object != null) { |
| MappingInformation.fromJsonObject( |
| version, |
| object, |
| diagnosticsHandler, |
| lineNo, |
| info -> { |
| MapVersionMappingInformation generatorInfo = info.asMapVersionMappingInformation(); |
| if (generatorInfo != null) { |
| if (generatorInfo.getMapVersion().equals(MapVersion.MAP_VERSION_EXPERIMENTAL)) { |
| // A mapping file that is marked "experimental" will be treated as an unversioned |
| // file if the compiler/tool is not explicitly running with experimental support. |
| version = |
| allowExperimentalMapping |
| ? MapVersion.MAP_VERSION_EXPERIMENTAL |
| : MapVersion.MAP_VERSION_NONE; |
| } else { |
| version = generatorInfo.getMapVersion(); |
| } |
| } |
| onMappingInfo.accept(info); |
| }); |
| return true; |
| } |
| return false; |
| } |
| |
| private void parseMemberMappings( |
| ProguardMap.Builder mapBuilder, ClassNaming.Builder classNamingBuilder) throws IOException { |
| MemberNaming lastAddedNaming = null; |
| // To ensure we only commit a member if we have the residual signature, we delay creating the |
| // object and have the variables out here. |
| Signature previousOriginalSignature = null; |
| String previousRenamedName = null; |
| int previousLineNumber = -1; |
| Range previousRange = null; |
| Box<Signature> currentResidualSignature = new Box<>(); |
| Box<List<ReferentialMappingInformation>> currentMappingInfoForMemberNaming = new Box<>(); |
| MappedRange activeMappedRange = null; |
| do { |
| Range originalRange = null; |
| // Try to parse any information added in comments above member namings |
| if (isCommentLineWithJsonBrace()) { |
| final String currentRenamedNameFinal = previousRenamedName; |
| final MappedRange currentRange = activeMappedRange; |
| // Reading global info should cause member mapping to return since we are now reading |
| // headers pertaining to what could be a concatinated file. |
| BooleanBox readGlobalInfo = new BooleanBox(false); |
| parseMappingInformation( |
| info -> { |
| readGlobalInfo.set(info.isGlobalMappingInformation()); |
| if (currentRenamedNameFinal == null) { |
| classNamingBuilder.addMappingInformation( |
| info, |
| conflictingInfo -> |
| diagnosticsHandler.warning( |
| MappingInformationDiagnostics.notAllowedCombination( |
| info, conflictingInfo, lineNo))); |
| return; |
| } |
| // Always add information to the current range, this will ensure that additional |
| // information is always placed the same place. |
| if (currentRange != null) { |
| currentRange.addMappingInformation( |
| info, |
| conflictingInfo -> |
| diagnosticsHandler.warning( |
| MappingInformationDiagnostics.notAllowedCombination( |
| info, conflictingInfo, lineNo))); |
| } |
| if (info.isReferentialMappingInformation()) { |
| ReferentialMappingInformation referentialMappingInformation = |
| info.asReferentialMappingInformation(); |
| MappingInformation.addMappingInformation( |
| currentMappingInfoForMemberNaming.computeIfAbsent(ArrayList::new), |
| referentialMappingInformation, |
| conflictingInfo -> |
| diagnosticsHandler.warning( |
| MappingInformationDiagnostics.notAllowedCombination( |
| info, conflictingInfo, lineNo))); |
| if (info.isResidualSignatureMappingInformation()) { |
| ResidualSignatureMappingInformation mappingInfo = |
| info.asResidualSignatureMappingInformation(); |
| if (!mappingInfo.isValid()) { |
| diagnosticsHandler.warning( |
| MappingInformationDiagnostics.invalidResidualSignature( |
| line.trim(), lineNo)); |
| return; |
| } |
| Signature residualSignature = |
| getResidualSignatureFromMappingInformation( |
| info.asResidualSignatureMappingInformation(), currentRenamedNameFinal); |
| currentResidualSignature.set(residualSignature); |
| if (currentRange != null) { |
| if (!mappingInfo.isResidualMethodSignatureMappingInformation()) { |
| diagnosticsHandler.warning( |
| MappingInformationDiagnostics.invalidResidualSignatureType( |
| info.serialize(), lineNo)); |
| currentResidualSignature.clear(); |
| return; |
| } |
| currentRange.setResidualSignatureInternal( |
| residualSignature.asMethodSignature()); |
| } |
| } |
| } |
| }); |
| if (readGlobalInfo.isTrue()) { |
| break; |
| } |
| // Skip reading the rest of the line. |
| lineOffset = line.length(); |
| continue; |
| } |
| // Parse the member line ' x:y:name:z:q -> renamedName'. |
| if (!StringUtils.isWhitespace(peekCodePoint())) { |
| break; |
| } |
| skipWhitespace(); |
| Range mappedRange = parseRange(); |
| if (mappedRange != null) { |
| if (mappedRange.isCardinal) { |
| throw new ParseException( |
| String.format("Invalid obfuscated line number range (%s).", mappedRange)); |
| } |
| skipWhitespace(); |
| expect(':'); |
| } |
| skipWhitespace(); |
| Signature signature = parseSignature(); |
| skipWhitespace(); |
| if (peekChar(0) == ':') { |
| // This is a mapping or inlining definition |
| nextChar(); |
| skipWhitespace(); |
| originalRange = parseRange(); |
| if (originalRange == null) { |
| throw new ParseException("No number follows the colon after the method signature."); |
| } |
| } |
| if (!allowEmptyMappedRanges && mappedRange == null && originalRange != null) { |
| throw new ParseException("No mapping for original range " + originalRange + "."); |
| } |
| |
| skipWhitespace(); |
| skipArrow(); |
| skipWhitespace(); |
| String renamedName = parseMethodName(); |
| |
| if (signature.isMethodSignature()) { |
| MethodSignature residualSignature = null; |
| // Propagate the active residual signature down to the next read mapped range if the |
| // original signature and name is the same - that is, there are no inline frames. |
| if (activeMappedRange != null |
| && activeMappedRange.signature == signature |
| && activeMappedRange.renamedName.equals(renamedName)) { |
| residualSignature = activeMappedRange.getResidualSignature(); |
| } |
| activeMappedRange = |
| classNamingBuilder.addMappedRange( |
| mappedRange, signature.asMethodSignature(), originalRange, renamedName); |
| if (activeMappedRange != null) { |
| if (residualSignature != null) { |
| activeMappedRange.setResidualSignatureInternal(residualSignature); |
| } else if (lastAddedNaming != null |
| && lastAddedNaming |
| .getOriginalSignature() |
| .equals(activeMappedRange.getOriginalSignature())) { |
| // If we already parsed a residual signature for the newly read mapped range and have |
| // lost the information about the residual signature we re-create it again. |
| activeMappedRange.setResidualSignatureInternal( |
| lastAddedNaming.getResidualSignature().asMethodSignature()); |
| } |
| } |
| } |
| |
| assert mappedRange == null || signature.isMethodSignature(); |
| if (previousOriginalSignature != null) { |
| boolean changedName = !previousRenamedName.equals(renamedName); |
| boolean changedMappedRange = |
| previousRange == null || !Objects.equals(previousRange, mappedRange); |
| boolean originalRangeChange = originalRange == null || !originalRange.isCardinal; |
| if (changedName || changedMappedRange || originalRangeChange) { |
| lastAddedNaming = |
| addMemberEntryOrCopyInformation( |
| lastAddedNaming, |
| previousOriginalSignature, |
| previousRenamedName, |
| previousLineNumber, |
| currentResidualSignature, |
| currentMappingInfoForMemberNaming, |
| previousRange, |
| classNamingBuilder); |
| } |
| } |
| previousOriginalSignature = signature; |
| previousRenamedName = renamedName; |
| previousLineNumber = lineNo; |
| previousRange = mappedRange; |
| } while (nextLine(mapBuilder)); |
| |
| if (previousOriginalSignature != null) { |
| addMemberEntryOrCopyInformation( |
| lastAddedNaming, |
| previousOriginalSignature, |
| previousRenamedName, |
| previousLineNumber, |
| currentResidualSignature, |
| currentMappingInfoForMemberNaming, |
| previousRange, |
| classNamingBuilder); |
| } |
| } |
| |
| private MemberNaming addMemberEntryOrCopyInformation( |
| MemberNaming lastAddedNaming, |
| Signature originalSignature, |
| String renamedName, |
| int lineNumber, |
| Box<Signature> residualSignature, |
| Box<List<ReferentialMappingInformation>> additionalMappingInformation, |
| Range previousMappedRange, |
| ClassNaming.Builder classNamingBuilder) { |
| // If this line refers to a member that should be added to classNamingBuilder (as opposed to |
| // an inner inlined callee) and it's different from the the previous activeMemberNaming, then |
| // flush (add) the current activeMemberNaming. |
| if (previousMappedRange == null |
| || lastAddedNaming == null |
| || !lastAddedNaming.getRenamedName().equals(renamedName) |
| || !lastAddedNaming.getOriginalSignature().equals(originalSignature)) { |
| Signature lookupKey = |
| getResidualSignatureForMemberNaming(residualSignature, originalSignature, renamedName); |
| MemberNaming newMemberNaming = classNamingBuilder.lookupMemberEntry(lookupKey); |
| if (newMemberNaming == null) { |
| newMemberNaming = |
| new MemberNaming(originalSignature, lookupKey, new LinePosition(lineNumber)); |
| } |
| if (additionalMappingInformation.isSet()) { |
| newMemberNaming.addAllMappingInformation(additionalMappingInformation.get()); |
| } |
| classNamingBuilder.addMemberEntry(newMemberNaming); |
| residualSignature.clear(); |
| additionalMappingInformation.clear(); |
| return newMemberNaming; |
| } |
| if (additionalMappingInformation.isSet()) { |
| lastAddedNaming.addAllMappingInformation(additionalMappingInformation.get()); |
| additionalMappingInformation.clear(); |
| } |
| residualSignature.clear(); |
| return lastAddedNaming; |
| } |
| |
| private Signature getResidualSignatureFromMappingInformation( |
| ResidualSignatureMappingInformation mappingInformation, String renamedName) { |
| if (mappingInformation.isResidualMethodSignatureMappingInformation()) { |
| ResidualMethodSignatureMappingInformation residualSignatureInfo = |
| mappingInformation.asResidualMethodSignatureMappingInformation(); |
| MethodSignature residualSignature = |
| new MethodSignature( |
| renamedName, |
| DescriptorUtils.descriptorToJavaType(residualSignatureInfo.getReturnType()), |
| ArrayUtils.mapToStringArray( |
| residualSignatureInfo.getParameters(), DescriptorUtils::descriptorToJavaType)); |
| return signatureCache |
| .computeIfAbsent(residualSignature, Function.identity()) |
| .asMethodSignature(); |
| } else { |
| assert mappingInformation.isResidualFieldSignatureMappingInformation(); |
| ResidualFieldSignatureMappingInformation residualSignatureInfo = |
| mappingInformation.asResidualFieldSignatureMappingInformation(); |
| FieldSignature residualSignature = |
| new FieldSignature( |
| renamedName, DescriptorUtils.descriptorToJavaType(residualSignatureInfo.getType())); |
| return signatureCache |
| .computeIfAbsent(residualSignature, Function.identity()) |
| .asFieldSignature(); |
| } |
| } |
| |
| private Signature getResidualSignatureForMemberNaming( |
| Box<Signature> residualSignature, Signature originalSignature, String renamedName) { |
| if (residualSignature.isSet()) { |
| if (residualSignature.get().kind() != originalSignature.kind()) { |
| diagnosticsHandler.warning( |
| MappingInformationDiagnostics.invalidResidualSignatureType( |
| residualSignature.get().toString(), lineNo)); |
| |
| } else { |
| return residualSignature.get(); |
| } |
| } |
| Signature signature = originalSignature.asRenamed(renamedName); |
| signature = signatureCache.computeIfAbsent(signature, Function.identity()); |
| return signature; |
| } |
| |
| private Position getPosition() { |
| return new LinePosition(lineNo); |
| } |
| |
| private static final class LinePosition implements Position { |
| private final int lineNo; |
| |
| LinePosition(int lineNo) { |
| this.lineNo = lineNo; |
| } |
| |
| @Override |
| public String getDescription() { |
| return "line " + lineNo; |
| } |
| |
| @Override |
| public int hashCode() { |
| return lineNo; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (o == this) { |
| return true; |
| } |
| if (o instanceof LinePosition) { |
| return lineNo == ((LinePosition) o).lineNo; |
| } |
| return false; |
| } |
| } |
| |
| // Parsing of components |
| |
| private void skipIdentifier(boolean allowInit) { |
| boolean isInit = false; |
| if (allowInit && peekChar(0) == '<') { |
| // swallow the leading < character |
| nextChar(); |
| isInit = true; |
| } |
| // Proguard sometimes outputs a ? as a method name. We have tools (dexsplitter) that depends |
| // on being able to map class names back to the original, but does not care if methods are |
| // correctly mapped. Using this on proguard output for anything else might not give correct |
| // remappings. |
| if (!IdentifierUtils.isDexIdentifierStart(peekCodePoint()) |
| && !IdentifierUtils.isQuestionMark(peekCodePoint())) { |
| throw new ParseException("Identifier expected"); |
| } |
| nextCodePoint(); |
| while (IdentifierUtils.isDexIdentifierPart(peekCodePoint()) |
| || IdentifierUtils.isQuestionMark(peekCodePoint())) { |
| nextCodePoint(); |
| } |
| if (isInit) { |
| expect('>'); |
| } |
| if (IdentifierUtils.isDexIdentifierPart(peekCodePoint())) { |
| throw new ParseException( |
| "End of identifier expected (was 0x" + Integer.toHexString(peekCodePoint()) + ")"); |
| } |
| } |
| |
| // Small direct-mapped cache for computing String.substring. |
| // |
| // Due to inlining, the same method names and parameter types will occur repeatedly on multiple |
| // lines. String.substring ends up allocating a lot of garbage, so we use this cache to find |
| // String objects without having to allocate memory. |
| // |
| // "Direct-mapped" is inspired from computer architecture, where having a lookup policy in |
| // which entries can only ever map to one cache line is often faster than a fancy LRU cache. |
| private static final int SUBSTRING_CACHE_SIZE = 64; |
| private final String[] substringCache = new String[SUBSTRING_CACHE_SIZE]; |
| // Cache for canonicalizing strings. |
| // This saves 10% of heap space for large programs. |
| private final HashMap<String, String> identifierCache = new HashMap<>(); |
| |
| // Cache for canonicalizing signatures. |
| // |
| // Due to inlining, the same MethodSignature will come up many times in a ProguardMap. |
| // This happens to help a bit for FieldSignature too, so lump those in. |
| private final HashMap<Signature, Signature> signatureCache = new HashMap<>(); |
| |
| private String substring(int start) { |
| int cacheIdx; |
| { |
| // Check if there was a recent String accessed which matches the substring. |
| int len = lineOffset - start; |
| cacheIdx = len % SUBSTRING_CACHE_SIZE; |
| String candidate = substringCache[cacheIdx]; |
| if (candidate != null |
| && candidate.length() == len |
| && line.regionMatches(start, candidate, 0, len)) { |
| return candidate; |
| } |
| } |
| |
| String result = line.substring(start, lineOffset); |
| return substringCache[cacheIdx] = identifierCache.computeIfAbsent(result, Function.identity()); |
| } |
| |
| private String parseMethodName() { |
| int startPosition = lineOffset; |
| skipIdentifier(true); |
| while (peekChar(0) == '.') { |
| nextChar(); |
| skipIdentifier(true); |
| } |
| return substring(startPosition); |
| } |
| |
| private String parseType(boolean allowArray) { |
| int startPosition = lineOffset; |
| skipIdentifier(false); |
| while (peekChar(0) == '.') { |
| nextChar(); |
| skipIdentifier(false); |
| } |
| if (allowArray) { |
| while (peekChar(0) == '[') { |
| nextChar(); |
| expect(']'); |
| } |
| } |
| return substring(startPosition); |
| } |
| |
| private Signature parseSignature() { |
| String type = parseType(true); |
| expectWhitespace(); |
| String name = parseMethodName(); |
| skipWhitespace(); |
| Signature signature; |
| if (peekChar(0) == '(') { |
| nextChar(); |
| skipWhitespace(); |
| String[] arguments; |
| if (peekChar(0) == ')') { |
| arguments = StringUtils.EMPTY_ARRAY; |
| } else { |
| List<String> items = new ArrayList<>(); |
| items.add(parseType(true)); |
| skipWhitespace(); |
| while (peekChar(0) != ')') { |
| skipWhitespace(); |
| expect(','); |
| skipWhitespace(); |
| items.add(parseType(true)); |
| } |
| arguments = items.toArray(StringUtils.EMPTY_ARRAY); |
| } |
| expect(')'); |
| signature = new MethodSignature(name, type, arguments); |
| } else { |
| signature = new FieldSignature(name, type); |
| } |
| return signatureCache.computeIfAbsent(signature, Function.identity()); |
| } |
| |
| private void skipArrow() { |
| expect('-'); |
| expect('>'); |
| } |
| |
| private boolean acceptArrow() { |
| if (peekChar(0) == '-' && peekChar(1) == '>') { |
| nextChar(); |
| nextChar(); |
| return true; |
| } |
| return false; |
| } |
| |
| private boolean acceptString(String s) { |
| for (int i = 0; i < s.length(); i++) { |
| if (peekChar(i) != s.charAt(i)) { |
| return false; |
| } |
| } |
| for (int i = 0; i < s.length(); i++) { |
| nextChar(); |
| } |
| return true; |
| } |
| |
| private boolean isSimpleDigit(char c) { |
| return '0' <= c && c <= '9'; |
| } |
| |
| private Range parseRange() { |
| if (!isSimpleDigit(peekChar(0))) { |
| return null; |
| } |
| int from = parseNumber(); |
| skipWhitespace(); |
| if (peekChar(0) != ':') { |
| return cardinalRangeCache.get(from); |
| } |
| expect(':'); |
| skipWhitespace(); |
| int to = parseNumber(); |
| if (from > to) { |
| throw new ParseException("From is larger than to in range: " + from + ":" + to); |
| } |
| return nonCardinalRangeCache.get(from, to); |
| } |
| |
| private int parseNumber() { |
| int result = 0; |
| if (!isSimpleDigit(peekChar(0))) { |
| throw new ParseException("Number expected"); |
| } |
| do { |
| result *= 10; |
| result += Character.getNumericValue(nextChar()); |
| } while (isSimpleDigit(peekChar(0))); |
| return result; |
| } |
| |
| private JsonObject parseJsonInComment() { |
| assert isCommentLineWithJsonBrace(); |
| try { |
| int firstIndex = 0; |
| while (line.charAt(firstIndex) != '{') { |
| firstIndex++; |
| } |
| return jsonParser.parse(line.substring(firstIndex)).getAsJsonObject(); |
| } catch (com.google.gson.JsonSyntaxException ex) { |
| // An info message is reported in MappingInformation. |
| return null; |
| } |
| } |
| |
| public class ParseException extends RuntimeException { |
| |
| private final int lineNo; |
| private final int lineOffset; |
| private final boolean eol; |
| private final String msg; |
| |
| ParseException(String msg) { |
| this(msg, false); |
| } |
| |
| ParseException(String msg, boolean eol) { |
| super(msg); |
| lineNo = ProguardMapReader.this.lineNo; |
| lineOffset = ProguardMapReader.this.lineOffset; |
| this.eol = eol; |
| this.msg = msg; |
| } |
| |
| @Override |
| public String getMessage() { |
| if (eol) { |
| return "Parse error [" + lineNo + ":eol] " + msg; |
| } else { |
| return "Parse error [" + lineNo + ":" + lineOffset + "] " + msg; |
| } |
| } |
| } |
| } |
