1 /*
2  * Copyright (C) 2013 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 "jvmti.h"
18 
19 // Test infrastructure
20 #include "jvmti_helper.h"
21 #include "scoped_local_ref.h"
22 #include "test_env.h"
23 
24 namespace art {
25 namespace Test1900TrackAlloc {
26 
27 using GetGlobalState = jvmtiError(*)(jvmtiEnv* env, jlong* allocated);
28 
29 struct AllocTrackingData {
30   GetGlobalState get_global_state;
31 };
32 
33 template <typename T>
Dealloc(T * t)34 static void Dealloc(T* t) {
35   jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(t));
36 }
37 
38 template <typename T, typename ...Rest>
Dealloc(T * t,Rest...rs)39 static void Dealloc(T* t, Rest... rs) {
40   Dealloc(t);
41   Dealloc(rs...);
42 }
43 
Java_art_Test1900_doDeallocate(JNIEnv * env,jclass,jlong jvmti_env_ptr,jlong ptr)44 extern "C" JNIEXPORT void JNICALL Java_art_Test1900_doDeallocate(JNIEnv* env,
45                                                                  jclass,
46                                                                  jlong jvmti_env_ptr,
47                                                                  jlong ptr) {
48   JvmtiErrorToException(env,
49                         reinterpret_cast<jvmtiEnv*>(jvmti_env_ptr),
50                         reinterpret_cast<jvmtiEnv*>(jvmti_env_ptr)->Deallocate(
51                             reinterpret_cast<unsigned char*>(static_cast<intptr_t>(ptr))));
52 }
53 
Java_art_Test1900_doAllocate(JNIEnv * env,jclass,jlong jvmti_env_ptr,jlong size)54 extern "C" JNIEXPORT jlong JNICALL Java_art_Test1900_doAllocate(JNIEnv* env,
55                                                                 jclass,
56                                                                 jlong jvmti_env_ptr,
57                                                                 jlong size) {
58   unsigned char* res = nullptr;
59   JvmtiErrorToException(env,
60                         reinterpret_cast<jvmtiEnv*>(jvmti_env_ptr),
61                         reinterpret_cast<jvmtiEnv*>(jvmti_env_ptr)->Allocate(size, &res));
62   return static_cast<jlong>(reinterpret_cast<intptr_t>(res));
63 }
64 
Java_art_Test1900_getAmountAllocated(JNIEnv * env,jclass)65 extern "C" JNIEXPORT jlong JNICALL Java_art_Test1900_getAmountAllocated(JNIEnv* env, jclass) {
66   AllocTrackingData* data = nullptr;
67   if (JvmtiErrorToException(
68       env, jvmti_env, jvmti_env->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&data)))) {
69     return -1;
70   }
71   if (data == nullptr || data->get_global_state == nullptr) {
72     ScopedLocalRef<jclass> rt_exception(env, env->FindClass("java/lang/RuntimeException"));
73     env->ThrowNew(rt_exception.get(), "Alloc tracking data not initialized.");
74     return -1;
75   }
76   jlong allocated = -1;
77   JvmtiErrorToException(env, jvmti_env, data->get_global_state(jvmti_env, &allocated));
78   return allocated;
79 }
80 
DeallocParams(jvmtiParamInfo * params,jint n_params)81 static void DeallocParams(jvmtiParamInfo* params, jint n_params) {
82   for (jint i = 0; i < n_params; i++) {
83     Dealloc(params[i].name);
84   }
85 }
86 
Java_art_Test1900_getDefaultJvmtiEnv(JNIEnv *,jclass)87 extern "C" JNIEXPORT jlong JNICALL Java_art_Test1900_getDefaultJvmtiEnv(JNIEnv*, jclass) {
88   return static_cast<jlong>(reinterpret_cast<intptr_t>(jvmti_env));
89 }
90 
Java_art_Test1900_destroyJvmtiEnv(JNIEnv * env,jclass,jlong jvmti_env_ptr)91 extern "C" JNIEXPORT void Java_art_Test1900_destroyJvmtiEnv(JNIEnv* env,
92                                                             jclass,
93                                                             jlong jvmti_env_ptr) {
94   JvmtiErrorToException(env,
95                         jvmti_env,
96                         reinterpret_cast<jvmtiEnv*>(jvmti_env_ptr)->DisposeEnvironment());
97 }
98 
Java_art_Test1900_newJvmtiEnv(JNIEnv * env,jclass)99 extern "C" JNIEXPORT jlong Java_art_Test1900_newJvmtiEnv(JNIEnv* env, jclass) {
100   JavaVM* vm = nullptr;
101   if (env->GetJavaVM(&vm) != 0) {
102     ScopedLocalRef<jclass> rt_exception(env, env->FindClass("java/lang/RuntimeException"));
103     env->ThrowNew(rt_exception.get(), "Unable to get JavaVM");
104     return -1;
105   }
106   jvmtiEnv* new_env = nullptr;
107   if (vm->GetEnv(reinterpret_cast<void**>(&new_env), JVMTI_VERSION_1_0) != 0) {
108     ScopedLocalRef<jclass> rt_exception(env, env->FindClass("java/lang/RuntimeException"));
109     env->ThrowNew(rt_exception.get(), "Unable to create new jvmtiEnv");
110     return -1;
111   }
112   return static_cast<jlong>(reinterpret_cast<intptr_t>(new_env));
113 }
114 
Java_art_Test1900_initializeTest(JNIEnv * env,jclass)115 extern "C" JNIEXPORT void JNICALL Java_art_Test1900_initializeTest(JNIEnv* env, jclass) {
116   void* old_data = nullptr;
117   if (JvmtiErrorToException(env, jvmti_env, jvmti_env->GetEnvironmentLocalStorage(&old_data))) {
118     return;
119   } else if (old_data != nullptr) {
120     ScopedLocalRef<jclass> rt_exception(env, env->FindClass("java/lang/RuntimeException"));
121     env->ThrowNew(rt_exception.get(), "Environment already has local storage set!");
122     return;
123   }
124   AllocTrackingData* data = nullptr;
125   if (JvmtiErrorToException(env,
126                             jvmti_env,
127                             jvmti_env->Allocate(sizeof(AllocTrackingData),
128                                                 reinterpret_cast<unsigned char**>(&data)))) {
129     return;
130   }
131   memset(data, 0, sizeof(AllocTrackingData));
132   // Get the extensions.
133   jint n_ext = 0;
134   jvmtiExtensionFunctionInfo* infos = nullptr;
135   if (JvmtiErrorToException(env, jvmti_env, jvmti_env->GetExtensionFunctions(&n_ext, &infos))) {
136     return;
137   }
138   for (jint i = 0; i < n_ext; i++) {
139     jvmtiExtensionFunctionInfo* cur_info = &infos[i];
140     if (strcmp("com.android.art.alloc.get_global_jvmti_allocation_state", cur_info->id) == 0) {
141       data->get_global_state = reinterpret_cast<GetGlobalState>(cur_info->func);
142     }
143     // Cleanup the cur_info
144     DeallocParams(cur_info->params, cur_info->param_count);
145     Dealloc(cur_info->id, cur_info->short_description, cur_info->params, cur_info->errors);
146   }
147   // Cleanup the array.
148   Dealloc(infos);
149   if (data->get_global_state == nullptr) {
150     ScopedLocalRef<jclass> rt_exception(env, env->FindClass("java/lang/RuntimeException"));
151     env->ThrowNew(rt_exception.get(), "Unable to find memory tracking extensions.");
152     return;
153   }
154   JvmtiErrorToException(env, jvmti_env, jvmti_env->SetEnvironmentLocalStorage(data));
155   return;
156 }
157 
158 }  // namespace Test1900TrackAlloc
159 }  // namespace art
160