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121 changes: 121 additions & 0 deletions
121
src/jvmMain/kotlin/dev/romainguy/kotlin/explorer/dex/DexDumpParser.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| /* | ||
| * Copyright (C) 2023 Romain Guy | ||
| * | ||
| * 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 dev.romainguy.kotlin.explorer.dex | ||
|
|
||
| import dev.romainguy.kotlin.explorer.BuiltInKotlinClass | ||
| import dev.romainguy.kotlin.explorer.consumeUntil | ||
|
|
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| private val PositionRegex = Regex("^\\s*0x(?<address>[0-9a-f]+) line=(?<line>\\d+)$") | ||
|
|
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| private const val ClassStart = "Class #" | ||
| private const val ClassEnd = "source_file_idx" | ||
| private const val ClassName = "Class descriptor" | ||
| private const val Instructions = "insns size" | ||
| private const val Positions = "positions" | ||
|
|
||
| internal class DexDumpParser(text: String) { | ||
| private val lines = text.lineSequence().iterator() | ||
| fun parseDexDump(): String { | ||
| val classes = buildList { | ||
| while (lines.consumeUntil(ClassStart)) { | ||
| add(readClass()) | ||
| } | ||
| } | ||
| return classes | ||
| .filter { it.methods.isNotEmpty() && !it.name.matches(BuiltInKotlinClass)} | ||
| .joinToString(separator = "\n") { it.toString() } | ||
| } | ||
|
|
||
| private fun readClass(): DexClass { | ||
| val className = lines.next().getClassName() | ||
| val methods = buildList { | ||
| while (lines.hasNext()) { | ||
| val line = lines.next().trim() | ||
| when { | ||
| line.startsWith(ClassEnd) -> break | ||
| line.startsWith(Instructions) -> add(readMethod(className)) | ||
| } | ||
| } | ||
| } | ||
| return DexClass(className, methods) | ||
| } | ||
|
|
||
| private fun readMethod(className: String): DexMethod { | ||
| val (name, type) = lines.next().substringAfterLast(".").split(':', limit = 2) | ||
| val instructions = readInstructions() | ||
| lines.consumeUntil(Positions) | ||
| val positions = readPositions() | ||
| val code = buildString { | ||
| instructions.forEach { | ||
| val lineNumber = positions[it.address] | ||
| val prefix = if (lineNumber != null) "%3s: ".format(lineNumber) else " " | ||
| append(" $prefix${it.address}: ${it.code}\n") | ||
| } | ||
| } | ||
| return DexMethod(className, name, type, code) | ||
| } | ||
|
|
||
| private fun readInstructions(): List<DexInstruction> { | ||
| return buildList { | ||
| while (lines.hasNext()) { | ||
| val line = lines.next() | ||
| if (line.startsWith(" ")) { | ||
| break | ||
| } | ||
| val (address, code) = line.substringAfter('|').split(": ", limit = 2) | ||
| add(DexInstruction(address, code)) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| private fun readPositions(): Map<String, Int> { | ||
| return buildMap { | ||
| while (lines.hasNext()) { | ||
| val line = lines.next() | ||
| val match = PositionRegex.matchEntire(line) ?: break | ||
| put(match.getValue("address"), match.getValue("line").toInt()) | ||
| } | ||
| } | ||
| } | ||
|
|
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| private class DexClass(val name: String, val methods: List<DexMethod>) { | ||
| override fun toString() = "class $name\n${methods.joinToString("\n\n") { it.toString() }}" | ||
| } | ||
|
|
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| private class DexMethod(val className: String, val name: String, val type: String, val code: String) { | ||
| override fun toString() = " $name$type // $className.$name()\n$code" | ||
| } | ||
|
|
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| private class DexInstruction(val address: String, val code: String) | ||
| } | ||
|
|
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| private fun MatchResult.getValue(group: String): String { | ||
| return groups[group]?.value ?: throw IllegalStateException("Value of $group not found in $value") | ||
| } | ||
|
|
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| private fun String.getClassName() = | ||
| getValue(ClassName) | ||
| .removePrefix("L") | ||
| .removeSuffix(";") | ||
| .replace('/', '.') | ||
|
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| private fun String.getValue(name: String): String { | ||
| if (!trim().startsWith(name)) { | ||
| throw IllegalStateException("Expected '$name'") | ||
| } | ||
| return substringAfter('\'').substringBefore('\'') | ||
| } |