base/android/jni_android.cc

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/android/jni_android.h"

#include <stddef.h>
#include <sys/prctl.h>

#include "base/android/java_exception_reporter.h"
#include "base/android/jni_string.h"
#include "base/android/jni_utils.h"
#include "base/android_runtime_jni_headers/Throwable_jni.h"
#include "base/debug/debugging_buildflags.h"
#include "base/debug/stack_trace.h"
#include "base/feature_list.h"
#include "base/logging.h"
#include "base/strings/string_util.h"
#include "build/build_config.h"
#include "build/robolectric_buildflags.h"
#include "third_party/jni_zero/jni_zero.h"

// Must come after all headers that specialize FromJniType() / ToJniType().
#include "base/jni_android_jni/JniAndroid_jni.h"

namespace base {
namespace android {
namespace {

// If disabled, we LOG(FATAL) immediately in native code when faced with an
// uncaught Java exception (historical behavior). If enabled, we give the Java
// uncaught exception handler a chance to handle the exception first, so that
// the crash is (hopefully) seen as a Java crash, not a native crash.
// TODO(crbug.com/40261529): remove this switch once we are confident the
// new behavior is fine.
BASE_FEATURE(kHandleExceptionsInJava,
             "HandleJniExceptionsInJava",
             base::FEATURE_ENABLED_BY_DEFAULT);

jclass g_out_of_memory_error_class = nullptr;

#if !BUILDFLAG(IS_ROBOLECTRIC)
jmethodID g_class_loader_load_class_method_id = nullptr;
// ClassLoader.loadClass() accepts either slashes or dots on Android, but JVM
// requires dots. We could translate, but there is no need to go through
// ClassLoaders in Robolectric anyways.
// https://cs.android.com/search?q=symbol:DexFile_defineClassNative
jclass GetClassFromSplit(JNIEnv* env,
                         const char* class_name,
                         const char* split_name) {
  DCHECK(IsStringASCII(class_name));
  ScopedJavaLocalRef<jstring> j_class_name(env, env->NewStringUTF(class_name));
  return static_cast<jclass>(env->CallObjectMethod(
      GetSplitClassLoader(env, split_name), g_class_loader_load_class_method_id,
      j_class_name.obj()));
}