1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "common_helper.h" 18 19 #include "jni.h" 20 #include "jvmti.h" 21 22 #include "jvmti_helper.h" 23 #include "scoped_local_ref.h" 24 #include "test_env.h" 25 26 namespace art { 27 28 namespace common_breakpoint { 29 30 struct BreakpointData { 31 jclass test_klass; 32 jmethodID breakpoint_method; 33 bool in_callback; 34 bool allow_recursive; 35 }; 36 37 extern "C" void breakpointCB(jvmtiEnv* jvmti, 38 JNIEnv* jnienv, 39 jthread thread, 40 jmethodID method, 41 jlocation location) { 42 BreakpointData* data = nullptr; 43 if (JvmtiErrorToException(jnienv, jvmti, 44 jvmti->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)))) { 45 return; 46 } 47 if (data->in_callback && !data->allow_recursive) { 48 return; 49 } 50 data->in_callback = true; 51 jobject method_arg = GetJavaMethod(jvmti, jnienv, method); 52 jnienv->CallStaticVoidMethod(data->test_klass, 53 data->breakpoint_method, 54 thread, 55 method_arg, 56 static_cast<jlong>(location)); 57 jnienv->DeleteLocalRef(method_arg); 58 data->in_callback = false; 59 } 60 61 extern "C" JNIEXPORT jobjectArray JNICALL Java_art_Breakpoint_getLineNumberTableNative( 62 JNIEnv* env, 63 jclass k ATTRIBUTE_UNUSED, 64 jobject target) { 65 jmethodID method = env->FromReflectedMethod(target); 66 if (env->ExceptionCheck()) { 67 return nullptr; 68 } 69 jint nlines; 70 jvmtiLineNumberEntry* lines = nullptr; 71 if (JvmtiErrorToException(env, jvmti_env, 72 jvmti_env->GetLineNumberTable(method, &nlines, &lines))) { 73 return nullptr; 74 } 75 jintArray lines_array = env->NewIntArray(nlines); 76 if (env->ExceptionCheck()) { 77 jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(lines)); 78 return nullptr; 79 } 80 jlongArray locs_array = env->NewLongArray(nlines); 81 if (env->ExceptionCheck()) { 82 jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(lines)); 83 return nullptr; 84 } 85 ScopedLocalRef<jclass> object_class(env, env->FindClass("java/lang/Object")); 86 if (env->ExceptionCheck()) { 87 jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(lines)); 88 return nullptr; 89 } 90 jobjectArray ret = env->NewObjectArray(2, object_class.get(), nullptr); 91 if (env->ExceptionCheck()) { 92 jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(lines)); 93 return nullptr; 94 } 95 jint* temp_lines = env->GetIntArrayElements(lines_array, /*isCopy*/nullptr); 96 jlong* temp_locs = env->GetLongArrayElements(locs_array, /*isCopy*/nullptr); 97 for (jint i = 0; i < nlines; i++) { 98 temp_lines[i] = lines[i].line_number; 99 temp_locs[i] = lines[i].start_location; 100 } 101 env->ReleaseIntArrayElements(lines_array, temp_lines, 0); 102 env->ReleaseLongArrayElements(locs_array, temp_locs, 0); 103 env->SetObjectArrayElement(ret, 0, locs_array); 104 env->SetObjectArrayElement(ret, 1, lines_array); 105 jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(lines)); 106 return ret; 107 } 108 109 extern "C" JNIEXPORT jlong JNICALL Java_art_Breakpoint_getStartLocation(JNIEnv* env, 110 jclass k ATTRIBUTE_UNUSED, 111 jobject target) { 112 jmethodID method = env->FromReflectedMethod(target); 113 if (env->ExceptionCheck()) { 114 return 0; 115 } 116 jlong start = 0; 117 jlong end = end; 118 JvmtiErrorToException(env, jvmti_env, jvmti_env->GetMethodLocation(method, &start, &end)); 119 return start; 120 } 121 122 extern "C" JNIEXPORT void JNICALL Java_art_Breakpoint_clearBreakpoint(JNIEnv* env, 123 jclass k ATTRIBUTE_UNUSED, 124 jobject target, 125 jlocation location) { 126 jmethodID method = env->FromReflectedMethod(target); 127 if (env->ExceptionCheck()) { 128 return; 129 } 130 JvmtiErrorToException(env, jvmti_env, jvmti_env->ClearBreakpoint(method, location)); 131 } 132 133 extern "C" JNIEXPORT void JNICALL Java_art_Breakpoint_setBreakpoint(JNIEnv* env, 134 jclass k ATTRIBUTE_UNUSED, 135 jobject target, 136 jlocation location) { 137 jmethodID method = env->FromReflectedMethod(target); 138 if (env->ExceptionCheck()) { 139 return; 140 } 141 JvmtiErrorToException(env, jvmti_env, jvmti_env->SetBreakpoint(method, location)); 142 } 143 144 extern "C" JNIEXPORT void JNICALL Java_art_Breakpoint_startBreakpointWatch( 145 JNIEnv* env, 146 jclass k ATTRIBUTE_UNUSED, 147 jclass method_klass, 148 jobject method, 149 jboolean allow_recursive, 150 jthread thr) { 151 BreakpointData* data = nullptr; 152 if (JvmtiErrorToException(env, 153 jvmti_env, 154 jvmti_env->Allocate(sizeof(BreakpointData), 155 reinterpret_cast<unsigned char**>(&data)))) { 156 return; 157 } 158 memset(data, 0, sizeof(BreakpointData)); 159 data->test_klass = reinterpret_cast<jclass>(env->NewGlobalRef(method_klass)); 160 data->breakpoint_method = env->FromReflectedMethod(method); 161 data->in_callback = false; 162 data->allow_recursive = allow_recursive; 163 164 void* old_data = nullptr; 165 if (JvmtiErrorToException(env, jvmti_env, jvmti_env->GetEnvironmentLocalStorage(&old_data))) { 166 return; 167 } else if (old_data != nullptr) { 168 ScopedLocalRef<jclass> rt_exception(env, env->FindClass("java/lang/RuntimeException")); 169 env->ThrowNew(rt_exception.get(), "Environment already has local storage set!"); 170 return; 171 } 172 if (JvmtiErrorToException(env, jvmti_env, jvmti_env->SetEnvironmentLocalStorage(data))) { 173 return; 174 } 175 jvmtiEventCallbacks cb; 176 memset(&cb, 0, sizeof(cb)); 177 cb.Breakpoint = breakpointCB; 178 if (JvmtiErrorToException(env, jvmti_env, jvmti_env->SetEventCallbacks(&cb, sizeof(cb)))) { 179 return; 180 } 181 if (JvmtiErrorToException(env, 182 jvmti_env, 183 jvmti_env->SetEventNotificationMode(JVMTI_ENABLE, 184 JVMTI_EVENT_BREAKPOINT, 185 thr))) { 186 return; 187 } 188 } 189 190 extern "C" JNIEXPORT void JNICALL Java_art_Breakpoint_stopBreakpointWatch( 191 JNIEnv* env, 192 jclass k ATTRIBUTE_UNUSED, 193 jthread thr) { 194 if (JvmtiErrorToException(env, jvmti_env, 195 jvmti_env->SetEventNotificationMode(JVMTI_DISABLE, 196 JVMTI_EVENT_BREAKPOINT, 197 thr))) { 198 return; 199 } 200 } 201 202 } // namespace common_breakpoint 203 204 } // namespace art 205
