Update //base to chromium 9659b08ea5a34f889dc4166217f438095ddc10d2

base/android/linker/linker_jni.cc

Index: base/android/linker/linker_jni.cc
diff --git a/base/android/linker/linker_jni.cc b/base/android/linker/linker_jni.cc
deleted file mode 100644
index 2bc480cf776dd6af931cd9885c1f6c2287adc2fd..0000000000000000000000000000000000000000
--- a/base/android/linker/linker_jni.cc
+++ /dev/null
@@ -1,803 +0,0 @@
-// 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
-// renderer process.
-
-// This source code *cannot* depend on anything from base/ or the C++
-// STL, to keep the final library small, and avoid ugly dependency issues.
-
-#include <android/log.h>
-#include <crazy_linker.h>
-#include <fcntl.h>
-#include <jni.h>
-#include <limits.h>
-#include <stdlib.h>
-#include <sys/mman.h>
-#include <unistd.h>
-
-// Set this to 1 to enable debug traces to the Android log.
-// Note that LOG() from "base/logging.h" cannot be used, since it is
-// in base/ which hasn't been loaded yet.
-#define DEBUG 0
-
-#define TAG "chromium_android_linker"
-
-#if DEBUG
-#define LOG_INFO(...) __android_log_print(ANDROID_LOG_INFO, TAG, __VA_ARGS__)
-#else
-#define LOG_INFO(...) ((void)0)
-#endif
-#define LOG_ERROR(...) __android_log_print(ANDROID_LOG_ERROR, TAG, __VA_ARGS__)
-
-#define UNUSED __attribute__((unused))
-
-namespace {
-
-// A simply scoped UTF String class that can be initialized from
-// a Java jstring handle. Modeled like std::string, which cannot
-// be used here.
-class String {
- public:
-  String(JNIEnv* env, jstring str);
-
-  ~String() {
-    if (ptr_)
-      ::free(ptr_);
-  }
-
-  const char* c_str() const { return ptr_ ? ptr_ : ""; }
-  size_t size() const { return size_; }
-
- private:
-  char* ptr_;
-  size_t size_;
-};
-
-String::String(JNIEnv* env, jstring str) {
-  size_ = env->GetStringUTFLength(str);
-  ptr_ = static_cast<char*>(::malloc(size_ + 1));
-
-  // Note: the result contains Java "modified UTF-8" bytes.
-  // Good enough for the linker though.
-  const char* bytes = env->GetStringUTFChars(str, NULL);
-  ::memcpy(ptr_, bytes, size_);
-  ptr_[size_] = '\0';
-
-  env->ReleaseStringUTFChars(str, bytes);
-}
-
-// Return true iff |address| is a valid address for the target CPU.
-bool IsValidAddress(jlong address) {
-  return static_cast<jlong>(static_cast<size_t>(address)) == address;
-}
-
-// Find the jclass JNI reference corresponding to a given |class_name|.
-// |env| is the current JNI environment handle.
-// On success, return true and set |*clazz|.
-bool InitClassReference(JNIEnv* env, const char* class_name, jclass* clazz) {
-  *clazz = env->FindClass(class_name);
-  if (!*clazz) {
-    LOG_ERROR("Could not find class for %s", class_name);
-    return false;
-  }
-  return true;
-}
-
-// Initialize a jfieldID corresponding to the field of a given |clazz|,
-// with name |field_name| and signature |field_sig|.
-// |env| is the current JNI environment handle.
-// On success, return true and set |*field_id|.
-bool InitFieldId(JNIEnv* env,
-                 jclass clazz,
-                 const char* field_name,
-                 const char* field_sig,
-                 jfieldID* field_id) {
-  *field_id = env->GetFieldID(clazz, field_name, field_sig);
-  if (!*field_id) {
-    LOG_ERROR("Could not find ID for field '%s'", field_name);
-    return false;
-  }
-  LOG_INFO(
-      "%s: Found ID %p for field '%s'", __FUNCTION__, *field_id, field_name);
-  return true;
-}
-
-// Initialize a jmethodID corresponding to the static method of a given
-// |clazz|, with name |method_name| and signature |method_sig|.
-// |env| is the current JNI environment handle.
-// On success, return true and set |*method_id|.
-bool InitStaticMethodId(JNIEnv* env,
-                        jclass clazz,
-                        const char* method_name,
-                        const char* method_sig,
-                        jmethodID* method_id) {
-  *method_id = env->GetStaticMethodID(clazz, method_name, method_sig);
-  if (!*method_id) {
-    LOG_ERROR("Could not find ID for static method '%s'", method_name);
-    return false;
-  }
-  LOG_INFO("%s: Found ID %p for static method '%s'",
-           __FUNCTION__, *method_id, method_name);
-  return true;
-}
-
-// Initialize a jfieldID corresponding to the static field of a given |clazz|,
-// with name |field_name| and signature |field_sig|.
-// |env| is the current JNI environment handle.
-// On success, return true and set |*field_id|.
-bool InitStaticFieldId(JNIEnv* env,
-                       jclass clazz,
-                       const char* field_name,
-                       const char* field_sig,
-                       jfieldID* field_id) {
-  *field_id = env->GetStaticFieldID(clazz, field_name, field_sig);
-  if (!*field_id) {
-    LOG_ERROR("Could not find ID for static field '%s'", field_name);
-    return false;
-  }
-  LOG_INFO(
-      "%s: Found ID %p for static field '%s'",
-      __FUNCTION__, *field_id, field_name);
-  return true;
-}
-
-// Initialize a jint corresponding to the static integer field of a class
-// with class name |class_name| and field name |field_name|.
-// |env| is the current JNI environment handle.
-// On success, return true and set |*value|.
-bool InitStaticInt(JNIEnv* env,
-                   const char* class_name,
-                   const char* field_name,
-                   jint* value) {
-  jclass clazz;
-  if (!InitClassReference(env, class_name, &clazz))
-    return false;
-
-  jfieldID field_id;
-  if (!InitStaticFieldId(env, clazz, field_name, "I", &field_id))
-    return false;
-
-  *value = env->GetStaticIntField(clazz, field_id);
-  LOG_INFO(
-      "%s: Found value %d for class '%s', static field '%s'",
-      __FUNCTION__, *value, class_name, field_name);
-
-  return true;
-}
-
-// A class used to model the field IDs of the org.chromium.base.Linker
-// LibInfo inner class, used to communicate data with the Java side
-// of the linker.
-struct LibInfo_class {
-  jfieldID load_address_id;
-  jfieldID load_size_id;
-  jfieldID relro_start_id;
-  jfieldID relro_size_id;
-  jfieldID relro_fd_id;
-
-  // Initialize an instance.
-  bool Init(JNIEnv* env) {
-    jclass clazz;
-    if (!InitClassReference(
-             env, "org/chromium/base/library_loader/Linker$LibInfo", &clazz)) {
-      return false;
-    }
-
-    return InitFieldId(env, clazz, "mLoadAddress", "J", &load_address_id) &&
-           InitFieldId(env, clazz, "mLoadSize", "J", &load_size_id) &&
-           InitFieldId(env, clazz, "mRelroStart", "J", &relro_start_id) &&
-           InitFieldId(env, clazz, "mRelroSize", "J", &relro_size_id) &&
-           InitFieldId(env, clazz, "mRelroFd", "I", &relro_fd_id);
-  }
-
-  void SetLoadInfo(JNIEnv* env,
-                   jobject library_info_obj,
-                   size_t load_address,
-                   size_t load_size) {
-    env->SetLongField(library_info_obj, load_address_id, load_address);
-    env->SetLongField(library_info_obj, load_size_id, load_size);
-  }
-
-  // Use this instance to convert a RelroInfo reference into
-  // a crazy_library_info_t.
-  void GetRelroInfo(JNIEnv* env,
-                    jobject library_info_obj,
-                    size_t* relro_start,
-                    size_t* relro_size,
-                    int* relro_fd) {
-    *relro_start = static_cast<size_t>(
-        env->GetLongField(library_info_obj, relro_start_id));
-
-    *relro_size =
-        static_cast<size_t>(env->GetLongField(library_info_obj, relro_size_id));
-
-    *relro_fd = env->GetIntField(library_info_obj, relro_fd_id);
-  }
-
-  void SetRelroInfo(JNIEnv* env,
-                    jobject library_info_obj,
-                    size_t relro_start,
-                    size_t relro_size,
-                    int relro_fd) {
-    env->SetLongField(library_info_obj, relro_start_id, relro_start);
-    env->SetLongField(library_info_obj, relro_size_id, relro_size);
-    env->SetIntField(library_info_obj, relro_fd_id, relro_fd);
-  }
-};
-
-static LibInfo_class s_lib_info_fields;
-
-// Retrieve the SDK build version and pass it into the crazy linker. This
-// needs to be done early in initialization, before any other crazy linker
-// code is run.
-// |env| is the current JNI environment handle.
-// On success, return true.
-bool InitSDKVersionInfo(JNIEnv* env) {
-  jint value = 0;
-  if (!InitStaticInt(env, "android/os/Build$VERSION", "SDK_INT", &value))
-    return false;
-
-  crazy_set_sdk_build_version(static_cast<int>(value));
-  LOG_INFO("%s: Set SDK build version to %d",
-           __FUNCTION__, static_cast<int>(value));
-
-  return true;
-}
-
-// The linker uses a single crazy_context_t object created on demand.
-// There is no need to protect this against concurrent access, locking
-// is already handled on the Java side.
-static crazy_context_t* s_crazy_context;
-
-crazy_context_t* GetCrazyContext() {
-  if (!s_crazy_context) {
-    // Create new context.
-    s_crazy_context = crazy_context_create();
-
-    // Ensure libraries located in the same directory as the linker
-    // can be loaded before system ones.
-    crazy_context_add_search_path_for_address(
-        s_crazy_context, reinterpret_cast<void*>(&s_crazy_context));
-  }
-
-  return s_crazy_context;
-}
-
-// A scoped crazy_library_t that automatically closes the handle
-// on scope exit, unless Release() has been called.
-class ScopedLibrary {
- public:
-  ScopedLibrary() : lib_(NULL) {}
-
-  ~ScopedLibrary() {
-    if (lib_)
-      crazy_library_close_with_context(lib_, GetCrazyContext());
-  }
-
-  crazy_library_t* Get() { return lib_; }
-
-  crazy_library_t** GetPtr() { return &lib_; }
-
-  crazy_library_t* Release() {
-    crazy_library_t* ret = lib_;
-    lib_ = NULL;
-    return ret;
-  }
-
- private:
-  crazy_library_t* lib_;
-};
-
-namespace {
-
-template <class LibraryOpener>
-bool GenericLoadLibrary(
-    JNIEnv* env,
-    const char* library_name, jlong load_address, jobject lib_info_obj,
-    const LibraryOpener& opener) {
-  crazy_context_t* context = GetCrazyContext();
-
-  if (!IsValidAddress(load_address)) {
-    LOG_ERROR("%s: Invalid address 0x%llx", __FUNCTION__, load_address);
-    return false;
-  }
-
-  // Set the desired load address (0 means randomize it).
-  crazy_context_set_load_address(context, static_cast<size_t>(load_address));
-
-  ScopedLibrary library;
-  if (!opener.Open(library.GetPtr(), library_name, context)) {
-    return false;
-  }
-
-  crazy_library_info_t info;
-  if (!crazy_library_get_info(library.Get(), context, &info)) {
-    LOG_ERROR("%s: Could not get library information for %s: %s",
-              __FUNCTION__,
-              library_name,
-              crazy_context_get_error(context));
-    return false;
-  }
-
-  // Release library object to keep it alive after the function returns.
-  library.Release();
-
-  s_lib_info_fields.SetLoadInfo(
-      env, lib_info_obj, info.load_address, info.load_size);
-  LOG_INFO("%s: Success loading library %s", __FUNCTION__, library_name);
-  return true;
-}
-
-// Used for opening the library in a regular file.
-class FileLibraryOpener {
- public:
-  bool Open(
-      crazy_library_t** library,
-      const char* library_name,
-      crazy_context_t* context) const;
-};
-
-bool FileLibraryOpener::Open(
-    crazy_library_t** library,
-    const char* library_name,
-    crazy_context_t* context) const {
-  if (!crazy_library_open(library, library_name, context)) {
-    LOG_ERROR("%s: Could not open %s: %s",
-              __FUNCTION__,
-              library_name,
-              crazy_context_get_error(context));
-    return false;
-  }
-  return true;
-}
-
-// Used for opening the library in a zip file.
-class ZipLibraryOpener {
- public:
-  explicit ZipLibraryOpener(const char* zip_file) : zip_file_(zip_file) {}
-  bool Open(
-      crazy_library_t** library,
-      const char* library_name,
-      crazy_context_t* context) const;
- private:
-  const char* zip_file_;
-};
-
-bool ZipLibraryOpener::Open(
-    crazy_library_t** library,
-    const char* library_name,
-    crazy_context_t* context) const {
-  if (!crazy_library_open_in_zip_file(
-          library, zip_file_, library_name, context)) {
-     LOG_ERROR("%s: Could not open %s in zip file %s: %s",
-               __FUNCTION__, library_name, zip_file_,
-               crazy_context_get_error(context));
-     return false;
-  }
-  return true;
-}
-
-}  // unnamed namespace
-
-// Load a library with the chromium linker. This will also call its
-// JNI_OnLoad() method, which shall register its methods. Note that
-// lazy native method resolution will _not_ work after this, because
-// Dalvik uses the system's dlsym() which won't see the new library,
-// so explicit registration is mandatory.
-// |env| is the current JNI environment handle.
-// |clazz| is the static class handle for org.chromium.base.Linker,
-// and is ignored here.
-// |library_name| is the library name (e.g. libfoo.so).
-// |load_address| is an explicit load address.
-// |library_info| is a LibInfo handle used to communicate information
-// with the Java side.
-// Return true on success.
-jboolean LoadLibrary(JNIEnv* env,
-                     jclass clazz,
-                     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);
-}
-
-// 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
-// will _not_ work after this, because Dalvik uses the system's dlsym()
-// which won't see the new library, so explicit registration is mandatory.
-//
-// |env| is the current JNI environment handle.
-// |clazz| is the static class handle for org.chromium.base.Linker,
-// and is ignored here.
-// |zipfile_name| is the filename of the zipfile containing the library.
-// |library_name| is the library base name (e.g. libfoo.so).
-// |load_address| is an explicit load address.
-// |library_info| is a LibInfo handle used to communicate information
-// with the Java side.
-// Returns true on success.
-jboolean LoadLibraryInZipFile(JNIEnv* env,
-                              jclass clazz,
-                              jstring zipfile_name,
-                              jstring library_name,
-                              jlong load_address,
-                              jobject lib_info_obj) {
-  String zipfile_name_str(env, zipfile_name);
-  String lib_name(env, library_name);
-  ZipLibraryOpener opener(zipfile_name_str.c_str());
-  return GenericLoadLibrary(
-      env, lib_name.c_str(),
-      static_cast<size_t>(load_address), lib_info_obj, opener);
-}
-
-// Class holding the Java class and method ID for the Java side Linker
-// postCallbackOnMainThread method.
-struct JavaCallbackBindings_class {
-  jclass clazz;
-  jmethodID method_id;
-
-  // Initialize an instance.
-  bool Init(JNIEnv* env, jclass linker_class) {
-    clazz = reinterpret_cast<jclass>(env->NewGlobalRef(linker_class));
-    return InitStaticMethodId(env,
-                              linker_class,
-                              "postCallbackOnMainThread",
-                              "(J)V",
-                              &method_id);
-  }
-};
-
-static JavaCallbackBindings_class s_java_callback_bindings;
-
-// Designated receiver function for callbacks from Java. Its name is known
-// to the Java side.
-// |env| is the current JNI environment handle and is ignored here.
-// |clazz| is the static class handle for org.chromium.base.Linker,
-// and is ignored here.
-// |arg| is a pointer to an allocated crazy_callback_t, deleted after use.
-void RunCallbackOnUiThread(JNIEnv* env, jclass clazz, jlong arg) {
-  crazy_callback_t* callback = reinterpret_cast<crazy_callback_t*>(arg);
-
-  LOG_INFO("%s: Called back from java with handler %p, opaque %p",
-           __FUNCTION__, callback->handler, callback->opaque);
-
-  crazy_callback_run(callback);
-  delete callback;
-}
-
-// Request a callback from Java. The supplied crazy_callback_t is valid only
-// for the duration of this call, so we copy it to a newly allocated
-// crazy_callback_t and then call the Java side's postCallbackOnMainThread.
-// This will call back to to our RunCallbackOnUiThread some time
-// later on the UI thread.
-// |callback_request| is a crazy_callback_t.
-// |poster_opaque| is unused.
-// Returns true if the callback request succeeds.
-static bool PostForLaterExecution(crazy_callback_t* callback_request,
-                                  void* poster_opaque UNUSED) {
-  crazy_context_t* context = GetCrazyContext();
-
-  JavaVM* vm;
-  int minimum_jni_version;
-  crazy_context_get_java_vm(context,
-                            reinterpret_cast<void**>(&vm),
-                            &minimum_jni_version);
-
-  // Do not reuse JNIEnv from JNI_OnLoad, but retrieve our own.
-  JNIEnv* env;
-  if (JNI_OK != vm->GetEnv(
-      reinterpret_cast<void**>(&env), minimum_jni_version)) {
-    LOG_ERROR("Could not create JNIEnv");
-    return false;
-  }
-
-  // Copy the callback; the one passed as an argument may be temporary.
-  crazy_callback_t* callback = new crazy_callback_t();
-  *callback = *callback_request;
-
-  LOG_INFO("%s: Calling back to java with handler %p, opaque %p",
-           __FUNCTION__, callback->handler, callback->opaque);
-
-  jlong arg = static_cast<jlong>(reinterpret_cast<uintptr_t>(callback));
-
-  env->CallStaticVoidMethod(
-      s_java_callback_bindings.clazz, s_java_callback_bindings.method_id, arg);
-
-  // Back out and return false if we encounter a JNI exception.
-  if (env->ExceptionCheck() == JNI_TRUE) {
-    env->ExceptionDescribe();
-    env->ExceptionClear();
-    delete callback;
-    return false;
-  }
-
-  return true;
-}
-
-jboolean CreateSharedRelro(JNIEnv* env,
-                           jclass clazz,
-                           jstring library_name,
-                           jlong load_address,
-                           jobject lib_info_obj) {
-  String lib_name(env, library_name);
-
-  LOG_INFO("%s: Called for %s", __FUNCTION__, lib_name.c_str());
-
-  if (!IsValidAddress(load_address)) {
-    LOG_ERROR("%s: Invalid address 0x%llx", __FUNCTION__, load_address);
-    return false;
-  }
-
-  ScopedLibrary library;
-  if (!crazy_library_find_by_name(lib_name.c_str(), library.GetPtr())) {
-    LOG_ERROR("%s: Could not find %s", __FUNCTION__, lib_name.c_str());
-    return false;
-  }
-
-  crazy_context_t* context = GetCrazyContext();
-  size_t relro_start = 0;
-  size_t relro_size = 0;
-  int relro_fd = -1;
-
-  if (!crazy_library_create_shared_relro(library.Get(),
-                                         context,
-                                         static_cast<size_t>(load_address),
-                                         &relro_start,
-                                         &relro_size,
-                                         &relro_fd)) {
-    LOG_ERROR("%s: Could not create shared RELRO sharing for %s: %s\n",
-              __FUNCTION__,
-              lib_name.c_str(),
-              crazy_context_get_error(context));
-    return false;
-  }
-
-  s_lib_info_fields.SetRelroInfo(
-      env, lib_info_obj, relro_start, relro_size, relro_fd);
-  return true;
-}
-
-jboolean UseSharedRelro(JNIEnv* env,
-                        jclass clazz,
-                        jstring library_name,
-                        jobject lib_info_obj) {
-  String lib_name(env, library_name);
-
-  LOG_INFO("%s: called for %s, lib_info_ref=%p",
-           __FUNCTION__,
-           lib_name.c_str(),
-           lib_info_obj);
-
-  ScopedLibrary library;
-  if (!crazy_library_find_by_name(lib_name.c_str(), library.GetPtr())) {
-    LOG_ERROR("%s: Could not find %s", __FUNCTION__, lib_name.c_str());
-    return false;
-  }
-
-  crazy_context_t* context = GetCrazyContext();
-  size_t relro_start = 0;
-  size_t relro_size = 0;
-  int relro_fd = -1;
-  s_lib_info_fields.GetRelroInfo(
-      env, lib_info_obj, &relro_start, &relro_size, &relro_fd);
-
-  LOG_INFO("%s: library=%s relro start=%p size=%p fd=%d",
-           __FUNCTION__,
-           lib_name.c_str(),
-           (void*)relro_start,
-           (void*)relro_size,
-           relro_fd);
-
-  if (!crazy_library_use_shared_relro(
-           library.Get(), context, relro_start, relro_size, relro_fd)) {
-    LOG_ERROR("%s: Could not use shared RELRO for %s: %s",
-              __FUNCTION__,
-              lib_name.c_str(),
-              crazy_context_get_error(context));
-    return false;
-  }
-
-  LOG_INFO("%s: Library %s using shared RELRO section!",
-           __FUNCTION__,
-           lib_name.c_str());
-
-  return true;
-}
-
-jboolean CanUseSharedRelro(JNIEnv* env, jclass clazz) {
-  return crazy_system_can_share_relro();
-}
-
-jlong GetRandomBaseLoadAddress(JNIEnv* env, jclass clazz, jlong bytes) {
-  void* address =
-      mmap(NULL, bytes, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-  if (address == MAP_FAILED) {
-    LOG_INFO("%s: Random base load address not determinable\n", __FUNCTION__);
-    return 0;
-  }
-  munmap(address, bytes);
-  LOG_INFO("%s: Random base load address is %p\n", __FUNCTION__, address);
-  return static_cast<jlong>(reinterpret_cast<uintptr_t>(address));
-}
-
-// Get the full path of a library in the zip file
-// (lib/<abi>/crazy.<lib_name>).
-//
-// |env| is the current JNI environment handle.
-// |clazz| is the static class handle which is not used here.
-// |lib_name| is the library base name.
-// Returns the full path (or empty string on failure).
-jstring GetLibraryFilePathInZipFile(JNIEnv* env,
-                                    jclass clazz,
-                                    jstring lib_name) {
-  String lib_name_str(env, lib_name);
-  const char* lib_name_c_str = lib_name_str.c_str();
-  char buffer[kMaxFilePathLengthInZip + 1];
-  if (crazy_library_file_path_in_zip_file(
-          lib_name_c_str, buffer, sizeof(buffer)) == CRAZY_STATUS_FAILURE) {
-    LOG_ERROR("%s: Failed to get full filename for library '%s'",
-              __FUNCTION__, lib_name_c_str);
-    buffer[0] = '\0';
-  }
-  return env->NewStringUTF(buffer);
-}
-
-// Check whether a library is page aligned and uncompressed in the APK file.
-//
-// |env| is the current JNI environment handle.
-// |clazz| is the static class handle which is not used here.
-// |apkfile_name| is the filename of the APK.
-// |library_name| is the library base name.
-// Returns true if page aligned and uncompressed.
-jboolean CheckLibraryIsMappableInApk(JNIEnv* env, jclass clazz,
-                                     jstring apkfile_name,
-                                     jstring library_name) {
-  String apkfile_name_str(env, apkfile_name);
-  const char* apkfile_name_c_str = apkfile_name_str.c_str();
-  String library_name_str(env, library_name);
-  const char* library_name_c_str = library_name_str.c_str();
-
-  LOG_INFO("%s: Checking if %s is page-aligned and uncompressed in %s\n",
-           __FUNCTION__, library_name_c_str, apkfile_name_c_str);
-  jboolean mappable = crazy_linker_check_library_is_mappable_in_zip_file(
-      apkfile_name_c_str, library_name_c_str) == CRAZY_STATUS_SUCCESS;
-  LOG_INFO("%s: %s\n", __FUNCTION__, mappable ? "Mappable" : "NOT mappable");
-
-  return mappable;
-}
-
-const JNINativeMethod kNativeMethods[] = {
-    {"nativeLoadLibrary",
-     "("
-     "Ljava/lang/String;"
-     "J"
-     "Lorg/chromium/base/library_loader/Linker$LibInfo;"
-     ")"
-     "Z",
-     reinterpret_cast<void*>(&LoadLibrary)},
-    {"nativeLoadLibraryInZipFile",
-     "("
-     "Ljava/lang/String;"
-     "Ljava/lang/String;"
-     "J"
-     "Lorg/chromium/base/library_loader/Linker$LibInfo;"
-     ")"
-     "Z",
-     reinterpret_cast<void*>(&LoadLibraryInZipFile)},
-    {"nativeRunCallbackOnUiThread",
-     "("
-     "J"
-     ")"
-     "V",
-     reinterpret_cast<void*>(&RunCallbackOnUiThread)},
-    {"nativeCreateSharedRelro",
-     "("
-     "Ljava/lang/String;"
-     "J"
-     "Lorg/chromium/base/library_loader/Linker$LibInfo;"
-     ")"
-     "Z",
-     reinterpret_cast<void*>(&CreateSharedRelro)},
-    {"nativeUseSharedRelro",
-     "("
-     "Ljava/lang/String;"
-     "Lorg/chromium/base/library_loader/Linker$LibInfo;"
-     ")"
-     "Z",
-     reinterpret_cast<void*>(&UseSharedRelro)},
-    {"nativeCanUseSharedRelro",
-     "("
-     ")"
-     "Z",
-     reinterpret_cast<void*>(&CanUseSharedRelro)},
-    {"nativeGetRandomBaseLoadAddress",
-     "("
-     "J"
-     ")"
-     "J",
-     reinterpret_cast<void*>(&GetRandomBaseLoadAddress)},
-    {"nativeGetLibraryFilePathInZipFile",
-     "("
-     "Ljava/lang/String;"
-     ")"
-     "Ljava/lang/String;",
-     reinterpret_cast<void*>(&GetLibraryFilePathInZipFile)},
-    {"nativeCheckLibraryIsMappableInApk",
-     "("
-     "Ljava/lang/String;"
-     "Ljava/lang/String;"
-     ")"
-     "Z",
-     reinterpret_cast<void*>(&CheckLibraryIsMappableInApk)}, };
-
-}  // namespace
-
-// JNI_OnLoad() hook called when the linker library is loaded through
-// the regular System.LoadLibrary) API. This shall save the Java VM
-// handle and initialize LibInfo fields.
-jint JNI_OnLoad(JavaVM* vm, void* reserved) {
-  LOG_INFO("%s: Entering", __FUNCTION__);
-  // Get new JNIEnv
-  JNIEnv* env;
-  if (JNI_OK != vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_4)) {
-    LOG_ERROR("Could not create JNIEnv");
-    return -1;
-  }
-
-  // Initialize SDK version info.
-  LOG_INFO("%s: Retrieving SDK version info", __FUNCTION__);
-  if (!InitSDKVersionInfo(env))
-    return -1;
-
-  // Register native methods.
-  jclass linker_class;
-  if (!InitClassReference(env,
-                          "org/chromium/base/library_loader/Linker",
-                          &linker_class))
-    return -1;
-
-  LOG_INFO("%s: Registering native methods", __FUNCTION__);
-  env->RegisterNatives(linker_class,
-                       kNativeMethods,
-                       sizeof(kNativeMethods) / sizeof(kNativeMethods[0]));
-
-  // Find LibInfo field ids.
-  LOG_INFO("%s: Caching field IDs", __FUNCTION__);
-  if (!s_lib_info_fields.Init(env)) {
-    return -1;
-  }
-
-  // Resolve and save the Java side Linker callback class and method.
-  LOG_INFO("%s: Resolving callback bindings", __FUNCTION__);
-  if (!s_java_callback_bindings.Init(env, linker_class)) {
-    return -1;
-  }
-
-  // Save JavaVM* handle into context.
-  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;
-}