From 64785d79a3e3179784a9ec046a4c8a5994f15dfd Mon Sep 17 00:00:00 2001
From: Ben Gruver <bgruv@google.com>
Date: Mon, 13 Jul 2015 21:48:54 -0700
Subject: Add support for using an oat file as the boot class path

---
 .../java/org/jf/dexlib2/analysis/ClassPath.java    | 57 +++++++++++++++++-----
 1 file changed, 46 insertions(+), 11 deletions(-)

(limited to 'dexlib2')

diff --git a/dexlib2/src/main/java/org/jf/dexlib2/analysis/ClassPath.java b/dexlib2/src/main/java/org/jf/dexlib2/analysis/ClassPath.java
index 4185da82..2233f599 100644
--- a/dexlib2/src/main/java/org/jf/dexlib2/analysis/ClassPath.java
+++ b/dexlib2/src/main/java/org/jf/dexlib2/analysis/ClassPath.java
@@ -34,13 +34,12 @@ package org.jf.dexlib2.analysis;
 import com.google.common.cache.CacheBuilder;
 import com.google.common.cache.CacheLoader;
 import com.google.common.cache.LoadingCache;
-import com.google.common.collect.ImmutableSet;
-import com.google.common.collect.Iterables;
-import com.google.common.collect.Lists;
-import com.google.common.collect.Maps;
+import com.google.common.collect.*;
 import org.jf.dexlib2.DexFileFactory;
 import org.jf.dexlib2.DexFileFactory.DexFileNotFound;
+import org.jf.dexlib2.DexFileFactory.MultipleDexFilesException;
 import org.jf.dexlib2.analysis.reflection.ReflectionClassDef;
+import org.jf.dexlib2.dexbacked.OatFile.OatDexFile;
 import org.jf.dexlib2.iface.ClassDef;
 import org.jf.dexlib2.iface.DexFile;
 import org.jf.dexlib2.immutable.ImmutableDexFile;
@@ -52,6 +51,7 @@ import java.io.IOException;
 import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -189,21 +189,46 @@ public class ClassPath {
                                           int api, boolean checkPackagePrivateAccess, boolean experimental) {
         ArrayList<DexFile> dexFiles = Lists.newArrayList();
 
+        boolean isArt = false;
+
+        for (String classPathEntry: classPath) {
+            List<? extends DexFile> classPathDexFiles =
+                    loadClassPathEntry(classPathDirs, classPathEntry, api, experimental);
+            if (!isArt) {
+                for (DexFile classPathDexFile: classPathDexFiles) {
+                    if (classPathDexFile instanceof OatDexFile) {
+                        isArt = true;
+                        break;
+                    }
+                }
+            }
+            dexFiles.addAll(classPathDexFiles);
+        }
+        dexFiles.add(dexFile);
+        return new ClassPath(dexFiles, checkPackagePrivateAccess);
+    }
+
+    @Nonnull
+    public static ClassPath fromClassPath(Iterable<String> classPathDirs, Iterable<String> classPath, DexFile dexFile,
+                                          int api, boolean checkPackagePrivateAccess, boolean experimental,
+                                          boolean isArt) {
+        ArrayList<DexFile> dexFiles = Lists.newArrayList();
+
         for (String classPathEntry: classPath) {
             try {
-                dexFiles.add(loadClassPathEntry(classPathDirs, classPathEntry, api, experimental));
+                dexFiles.addAll(loadClassPathEntry(classPathDirs, classPathEntry, api, experimental));
             } catch (ExceptionWithContext e){}
         }
         dexFiles.add(dexFile);
-        return new ClassPath(dexFiles, checkPackagePrivateAccess);
+        return new ClassPath(dexFiles, checkPackagePrivateAccess, isArt);
     }
 
     private static final Pattern dalvikCacheOdexPattern = Pattern.compile("@([^@]+)@classes.dex$");
 
     @Nonnull
-    private static DexFile loadClassPathEntry(@Nonnull Iterable<String> classPathDirs,
-                                              @Nonnull String bootClassPathEntry, int api,
-                                              boolean experimental) {
+    private static List<? extends DexFile> loadClassPathEntry(@Nonnull Iterable<String> classPathDirs,
+                                                              @Nonnull String bootClassPathEntry, int api,
+                                                              boolean experimental) {
         File rawEntry = new File(bootClassPathEntry);
         // strip off the path - we only care about the filename
         String entryName = rawEntry.getName();
@@ -229,7 +254,15 @@ public class ClassPath {
         }
 
         for (String classPathDir: classPathDirs) {
-            for (String ext: new String[]{"", ".odex", ".jar", ".apk", ".zip"}) {
+            String[] extensions;
+
+            if (entryName.endsWith(".oat")) {
+                extensions = new String[] { ".oat" };
+            } else {
+                extensions = new String[] { "", ".odex", ".jar", ".apk", ".zip" };
+            }
+
+            for (String ext: extensions) {
                 File file = new File(classPathDir, baseEntryName + ext);
 
                 if (file.exists() && file.isFile()) {
@@ -238,9 +271,11 @@ public class ClassPath {
                                 "warning: cannot open %s for reading. Will continue looking.", file.getPath()));
                     } else {
                         try {
-                            return DexFileFactory.loadDexFile(file, api, experimental);
+                            return ImmutableList.of(DexFileFactory.loadDexFile(file, api, experimental));
                         } catch (DexFileNotFound ex) {
                             // ignore and continue
+                        } catch (MultipleDexFilesException ex) {
+                            return ex.oatFile.getDexFiles();
                         } catch (Exception ex) {
                             throw ExceptionWithContext.withContext(ex,
                                     "Error while reading boot class path entry \"%s\"", bootClassPathEntry);
-- 
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