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https://github.com/mollyim/webrtc.git
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bc5c5e9d66
Bug: chromium:325408567 Change-Id: I2eb33b077148bf89223f1f69b07339fc9f2d948e Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/347921 Reviewed-by: Jeremy Leconte <jleconte@google.com> Commit-Queue: Jeremy Leconte <jleconte@google.com> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#42151}
95 lines
3.4 KiB
C++
95 lines
3.4 KiB
C++
/*
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* Copyright 2017 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "sdk/android/native_api/jni/class_loader.h"
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#include <algorithm>
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#include <string>
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#include "rtc_base/checks.h"
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#include "sdk/android/generated_native_api_jni/WebRtcClassLoader_jni.h"
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#include "sdk/android/native_api/jni/java_types.h"
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#include "third_party/jni_zero/jni_zero.h"
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// Abort the process if `jni` has a Java exception pending. This macros uses the
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// comma operator to execute ExceptionDescribe and ExceptionClear ignoring their
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// return values and sending "" to the error stream.
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#define CHECK_EXCEPTION(jni) \
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RTC_CHECK(!jni->ExceptionCheck()) \
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<< (jni->ExceptionDescribe(), jni->ExceptionClear(), "")
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namespace webrtc {
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namespace {
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class ClassLoader {
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public:
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explicit ClassLoader(JNIEnv* env)
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: class_loader_(jni::Java_WebRtcClassLoader_getClassLoader(env)) {
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class_loader_class_ = reinterpret_cast<jclass>(
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env->NewGlobalRef(env->FindClass("java/lang/ClassLoader")));
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CHECK_EXCEPTION(env);
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load_class_method_ =
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env->GetMethodID(class_loader_class_, "loadClass",
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"(Ljava/lang/String;)Ljava/lang/Class;");
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CHECK_EXCEPTION(env);
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}
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ScopedJavaLocalRef<jclass> FindClass(JNIEnv* env, const char* c_name) {
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// ClassLoader.loadClass expects a classname with components separated by
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// dots instead of the slashes that JNIEnv::FindClass expects.
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std::string name(c_name);
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std::replace(name.begin(), name.end(), '/', '.');
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ScopedJavaLocalRef<jstring> j_name = NativeToJavaString(env, name);
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const jclass clazz = static_cast<jclass>(env->CallObjectMethod(
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class_loader_.obj(), load_class_method_, j_name.obj()));
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CHECK_EXCEPTION(env);
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return ScopedJavaLocalRef<jclass>(env, clazz);
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}
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private:
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ScopedJavaGlobalRef<jobject> class_loader_;
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jclass class_loader_class_;
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jmethodID load_class_method_;
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};
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static ClassLoader* g_class_loader = nullptr;
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jclass GetClass(JNIEnv* env, const char* class_name, const char* unused) {
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RTC_CHECK(g_class_loader);
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return static_cast<jclass>(
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g_class_loader->FindClass(env, class_name).Release());
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}
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} // namespace
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void InitClassLoader(JNIEnv* env) {
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RTC_CHECK(g_class_loader == nullptr);
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g_class_loader = new ClassLoader(env);
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jni_zero::SetClassResolver(&GetClass);
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}
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ScopedJavaLocalRef<jclass> GetClass(JNIEnv* env, const char* c_name) {
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if (g_class_loader != nullptr) {
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// The class loader will be null in the JNI code called from the ClassLoader
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// ctor when we are bootstrapping ourself.
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return g_class_loader->FindClass(env, c_name);
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}
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// jni_zero generated code uses dots instead of slashes.
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// Convert to use slashes since that's what JNI's FindClass expects.
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// See
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// https://cs.android.com/android/platform/superproject/main/+/main:art/runtime/jni/check_jni.cc;l=349;drc=0f62043c1670cd365aba1894ad8046cdfc1c905d
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std::string name(c_name);
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std::replace(name.begin(), name.end(), '.', '/');
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return ScopedJavaLocalRef<jclass>(env, env->FindClass(name.c_str()));
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}
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} // namespace webrtc
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