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// Copyright 2015 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/java_exception_reporter.h"
#include "base/android/jni_android.h"
#include "base/android/jni_string.h"
#include "base/android/scoped_java_ref.h"
#include "base/base_jni/JavaExceptionReporter_jni.h"
#include "base/debug/dump_without_crashing.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/lazy_instance.h"
using base::android::JavaParamRef;
using base::android::JavaRef;
namespace base {
namespace android {
namespace {
void (*g_java_exception_callback)(const char*);
using JavaExceptionFilter =
base::RepeatingCallback<bool(const JavaRef<jthrowable>&)>;
LazyInstance<JavaExceptionFilter>::Leaky g_java_exception_filter =
LAZY_INSTANCE_INITIALIZER;
} // namespace
void InitJavaExceptionReporter() {
JNIEnv* env = base::android::AttachCurrentThread();
// Since JavaExceptionReporter#installHandler will chain through to the
// default handler, the default handler should cause a crash as if it's a
// normal java exception. Prefer to crash the browser process in java rather
// than native since for webview, the embedding app may have installed its
// own JavaExceptionReporter handler and would expect it to be called.
constexpr bool crash_after_report = false;
SetJavaExceptionFilter(
base::BindRepeating([](const JavaRef<jthrowable>&) { return true; }));
Java_JavaExceptionReporter_installHandler(env, crash_after_report);
}
void InitJavaExceptionReporterForChildProcess() {
JNIEnv* env = base::android::AttachCurrentThread();
constexpr bool crash_after_report = true;
SetJavaExceptionFilter(
base::BindRepeating([](const JavaRef<jthrowable>&) { return true; }));
Java_JavaExceptionReporter_installHandler(env, crash_after_report);
}
void SetJavaExceptionFilter(JavaExceptionFilter java_exception_filter) {
g_java_exception_filter.Get() = std::move(java_exception_filter);
}
void SetJavaExceptionCallback(void (*callback)(const char*)) {
DCHECK(!g_java_exception_callback);
g_java_exception_callback = callback;
}
void SetJavaException(const char* exception) {
// No need to print exception because they are already logged via
// env->ExceptionDescribe() within jni_android.cc.
if (g_java_exception_callback) {
g_java_exception_callback(exception);
}
}
void JNI_JavaExceptionReporter_ReportJavaException(
JNIEnv* env,
jboolean crash_after_report,
const JavaParamRef<jthrowable>& e) {
std::string exception_info = base::android::GetJavaExceptionInfo(env, e);
bool should_report_exception = g_java_exception_filter.Get().Run(e);
if (should_report_exception) {
SetJavaException(exception_info.c_str());
}
if (crash_after_report) {
LOG(ERROR) << exception_info;
LOG(FATAL) << "Uncaught exception";
}
if (should_report_exception) {
base::debug::DumpWithoutCrashing();
SetJavaException(nullptr);
}
}
void JNI_JavaExceptionReporter_ReportJavaStackTrace(
JNIEnv* env,
const JavaParamRef<jstring>& stack_trace) {
SetJavaException(ConvertJavaStringToUTF8(stack_trace).c_str());
base::debug::DumpWithoutCrashing();
SetJavaException(nullptr);
}
} // namespace android
} // namespace base
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