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@@ -974,4 +974,4 @@ trait Container { | |
| return callBack.output | ||
| } | ||
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| } | ||
| } | ||
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| /* | ||
| * Copyright 2020 Odnoklassniki Ltd, Mail.Ru Group | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| #include <jvmti.h> | ||
| #include <stdlib.h> | ||
| #include <string.h> | ||
| #include <time.h> | ||
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| static jlong (*real_time_millis)(JNIEnv *, jclass) = NULL; | ||
| static jlong (*real_nano_time_adjustment)(JNIEnv *, jclass, jlong) = NULL; | ||
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| jlong JNICALL fake_time_millis(JNIEnv* env, jclass cls) | ||
| { | ||
| jclass systemClass = env->FindClass("java/lang/System"); | ||
| jmethodID getPropertyMethodId = env->GetStaticMethodID(systemClass, "getProperty", "(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;"); | ||
| jstring offsetPropertyName = env->NewStringUTF("faketime.offset.seconds"); | ||
| jstring offsetPropertyDefault = env->NewStringUTF("0"); | ||
| jstring offsetValue = (jstring)env->CallStaticObjectMethod(systemClass, getPropertyMethodId, offsetPropertyName, offsetPropertyDefault); | ||
| const char *offset = env->GetStringUTFChars(offsetValue, NULL); | ||
| jlong result = real_time_millis(env, cls) + atoll(offset); | ||
| env->ReleaseStringUTFChars(offsetValue, offset); | ||
| return result; | ||
| } | ||
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| jlong JNICALL fake_nano_time_adjustment(JNIEnv *env, jclass cls, jlong offset_seconds) | ||
| { | ||
| jclass systemClass = env->FindClass("java/lang/System"); | ||
| jmethodID getPropertyMethodId = env->GetStaticMethodID(systemClass, "getProperty", "(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;"); | ||
| jstring offsetPropertyName = env->NewStringUTF("faketime.offset.seconds"); | ||
| jstring offsetPropertyDefault = env->NewStringUTF("0"); | ||
| jstring offsetValue = (jstring)env->CallStaticObjectMethod(systemClass, getPropertyMethodId, offsetPropertyName, offsetPropertyDefault); | ||
| const char *offset = env->GetStringUTFChars(offsetValue, NULL); | ||
| jlong result = real_nano_time_adjustment(env, cls, offset_seconds) + atoll(offset) * 1000000; | ||
| env->ReleaseStringUTFChars(offsetValue, offset); | ||
| return result; | ||
| } | ||
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| void JNICALL NativeMethodBind(jvmtiEnv *jvmti, JNIEnv *env, jthread thread, jmethodID method, | ||
| void *address, void **new_address_ptr) | ||
| { | ||
| char *name; | ||
| if (jvmti->GetMethodName(method, &name, NULL, NULL) == 0) | ||
| { | ||
| if (real_time_millis == NULL && strcmp(name, "currentTimeMillis") == 0) | ||
| { | ||
| real_time_millis = (jlong(*)(JNIEnv *, jclass))address; | ||
| *new_address_ptr = (void *)fake_time_millis; | ||
| } | ||
| else if (real_nano_time_adjustment == NULL && strcmp(name, "getNanoTimeAdjustment") == 0) | ||
| { | ||
| real_nano_time_adjustment = (jlong(*)(JNIEnv *, jclass, jlong))address; | ||
| *new_address_ptr = (void *)fake_nano_time_adjustment; | ||
| } | ||
| jvmti->Deallocate((unsigned char *)name); | ||
| } | ||
| } | ||
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| JNIEXPORT jint JNICALL Agent_OnLoad(JavaVM *vm, char *options, void *reserved) | ||
| { | ||
| jvmtiEnv *jvmti; | ||
| vm->GetEnv((void **)&jvmti, JVMTI_VERSION_1_0); | ||
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| jvmtiCapabilities capabilities = {0}; | ||
| capabilities.can_generate_native_method_bind_events = 1; | ||
| #if JNI_VERSION_9 | ||
| jvmtiCapabilities potential_capabilities; | ||
| jvmti->GetPotentialCapabilities(&potential_capabilities); | ||
| capabilities.can_generate_early_vmstart = potential_capabilities.can_generate_early_vmstart; | ||
| #endif | ||
| jvmti->AddCapabilities(&capabilities); | ||
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| jvmtiEventCallbacks callbacks = {0}; | ||
| callbacks.NativeMethodBind = NativeMethodBind; | ||
| jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks)); | ||
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| jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_NATIVE_METHOD_BIND, NULL); | ||
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| return 0; | ||
| } |