Fallback for loading library from a zipfile.

base/android/linker/linker_jni.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This is the Android-specific Chromium linker, a tiny shared library
 // implementing a custom dynamic linker that can be used to load the
 // real Chromium libraries (e.g. libcontentshell.so).
 
 // The main point of this linker is to be able to share the RELRO
 // section of libcontentshell.so (or equivalent) between the browser and
@@ skipping 332 matching lines @@
                      jstring library_name,
                      jlong load_address,
                      jobject lib_info_obj) {
   String lib_name(env, library_name);
   FileLibraryOpener opener;
   return GenericLoadLibrary(
       env, lib_name.c_str(),
       static_cast<size_t>(load_address), lib_info_obj, opener);
 }
 
+const size_t kMaxFilenameInZip = 256;
+jstring LibraryFilenameInZipFile(JNIEnv* env, jclass clazz, jstring lib_name) {
+  String lib_name_str(env, lib_name);
+  char buffer[kMaxFilenameInZip + 1];
+  if (CRAZY_STATUS_SUCCESS != crazy_library_filename_in_zip_file(
+          lib_name_str.c_str(), buffer, sizeof(buffer))) {
+    LOG_ERROR("Failure to get library filename from zipfile");
+    buffer[0] = '\0';
+  }
+  return env->NewStringUTF(buffer);
+}
+
 // Load a library from a zipfile with the chromium linker. The
 // library in the zipfile must be uncompressed and page aligned.
 // The basename of the library is given. The library is expected
 // to be lib/<abi_tag>/crazy.<basename>. The <abi_tag> used will be the
 // same as the abi for this linker. The "crazy." prefix is included
 // so that the Android Package Manager doesn't extract the library into
 // /data/app-lib.
 //
 // Loading the library will also call its JNI_OnLoad() method, which
 // shall register its methods. Note that lazy native method resolution
@@ skipping 252 matching lines @@
 
 const JNINativeMethod kNativeMethods[] = {
     {"nativeLoadLibrary",
      "("
      "Ljava/lang/String;"
      "J"
      "Lorg/chromium/base/library_loader/Linker$LibInfo;"
      ")"
      "Z",
      reinterpret_cast<void*>(&LoadLibrary)},
+    {"nativeLibraryFilenameInZipFile",
+     "("
+     "Ljava/lang/String;"
+     ")"
+     "Ljava/lang/String;",
+     reinterpret_cast<void*>(&LibraryFilenameInZipFile)},
     {"nativeLoadLibraryInZipFile",
      "("
      "Ljava/lang/String;"
      "Ljava/lang/String;"
      "J"
      "Lorg/chromium/base/library_loader/Linker$LibInfo;"
      ")"
      "Z",
      reinterpret_cast<void*>(&LoadLibraryInZipFile)},
     {"nativeRunCallbackOnUiThread",
@@ skipping 77 matching lines @@
   crazy_context_t* context = GetCrazyContext();
   crazy_context_set_java_vm(context, vm, JNI_VERSION_1_4);
 
   // Register the function that the crazy linker can call to post code
   // for later execution.
   crazy_context_set_callback_poster(context, &PostForLaterExecution, NULL);
 
   LOG_INFO("%s: Done", __FUNCTION__);
   return JNI_VERSION_1_4;
 }