Alex Light | d0d6596 | 2017-06-30 11:13:33 -0700 | [diff] [blame] | 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; |
Andreas Gampe | e383d23 | 2018-06-19 12:29:51 -0700 | [diff] [blame] | 117 | jlong end; |
Alex Light | d0d6596 | 2017-06-30 11:13:33 -0700 | [diff] [blame] | 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 | } |
Alex Light | 9e7859c | 2018-04-05 13:49:43 -0700 | [diff] [blame] | 175 | current_callbacks.Breakpoint = breakpointCB; |
| 176 | if (JvmtiErrorToException(env, |
| 177 | jvmti_env, |
| 178 | jvmti_env->SetEventCallbacks(¤t_callbacks, |
| 179 | sizeof(current_callbacks)))) { |
Alex Light | d0d6596 | 2017-06-30 11:13:33 -0700 | [diff] [blame] | 180 | return; |
| 181 | } |
| 182 | if (JvmtiErrorToException(env, |
| 183 | jvmti_env, |
| 184 | jvmti_env->SetEventNotificationMode(JVMTI_ENABLE, |
| 185 | JVMTI_EVENT_BREAKPOINT, |
| 186 | thr))) { |
| 187 | return; |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | extern "C" JNIEXPORT void JNICALL Java_art_Breakpoint_stopBreakpointWatch( |
| 192 | JNIEnv* env, |
| 193 | jclass k ATTRIBUTE_UNUSED, |
| 194 | jthread thr) { |
| 195 | if (JvmtiErrorToException(env, jvmti_env, |
| 196 | jvmti_env->SetEventNotificationMode(JVMTI_DISABLE, |
| 197 | JVMTI_EVENT_BREAKPOINT, |
| 198 | thr))) { |
| 199 | return; |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | } // namespace common_breakpoint |
| 204 | |
| 205 | } // namespace art |