1 /* 2 * Copyright (C) 2015 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 "jni.h" 18 19 #include "art_method-inl.h" 20 #include "base/enums.h" 21 #include "base/logging.h" 22 #include "dex_file-inl.h" 23 #include "instrumentation.h" 24 #include "jit/jit.h" 25 #include "jit/jit_code_cache.h" 26 #include "jit/profiling_info.h" 27 #include "mirror/class-inl.h" 28 #include "nativehelper/ScopedUtfChars.h" 29 #include "oat_quick_method_header.h" 30 #include "runtime.h" 31 #include "scoped_thread_state_change-inl.h" 32 #include "thread-current-inl.h" 33 34 namespace art { 35 36 // public static native boolean hasJit(); 37 38 static jit::Jit* GetJitIfEnabled() { 39 Runtime* runtime = Runtime::Current(); 40 bool can_jit = 41 runtime != nullptr 42 && runtime->GetJit() != nullptr 43 && runtime->GetInstrumentation()->GetCurrentInstrumentationLevel() != 44 instrumentation::Instrumentation::InstrumentationLevel::kInstrumentWithInterpreter; 45 return can_jit ? runtime->GetJit() : nullptr; 46 } 47 48 extern "C" JNIEXPORT jboolean JNICALL Java_Main_hasJit(JNIEnv*, jclass) { 49 return GetJitIfEnabled() != nullptr; 50 } 51 52 // public static native boolean hasOatFile(); 53 54 extern "C" JNIEXPORT jboolean JNICALL Java_Main_hasOatFile(JNIEnv* env, jclass cls) { 55 ScopedObjectAccess soa(env); 56 57 ObjPtr<mirror::Class> klass = soa.Decode<mirror::Class>(cls); 58 const DexFile& dex_file = klass->GetDexFile(); 59 const OatFile::OatDexFile* oat_dex_file = dex_file.GetOatDexFile(); 60 return (oat_dex_file != nullptr) ? JNI_TRUE : JNI_FALSE; 61 } 62 63 // public static native boolean runtimeIsSoftFail(); 64 65 extern "C" JNIEXPORT jboolean JNICALL Java_Main_runtimeIsSoftFail(JNIEnv* env ATTRIBUTE_UNUSED, 66 jclass cls ATTRIBUTE_UNUSED) { 67 return Runtime::Current()->IsVerificationSoftFail() ? JNI_TRUE : JNI_FALSE; 68 } 69 70 // public static native boolean isDex2OatEnabled(); 71 72 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isDex2OatEnabled(JNIEnv* env ATTRIBUTE_UNUSED, 73 jclass cls ATTRIBUTE_UNUSED) { 74 return Runtime::Current()->IsDex2OatEnabled(); 75 } 76 77 // public static native boolean hasImage(); 78 79 extern "C" JNIEXPORT jboolean JNICALL Java_Main_hasImage(JNIEnv* env ATTRIBUTE_UNUSED, 80 jclass cls ATTRIBUTE_UNUSED) { 81 return Runtime::Current()->GetHeap()->HasBootImageSpace(); 82 } 83 84 // public static native boolean isImageDex2OatEnabled(); 85 86 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isImageDex2OatEnabled(JNIEnv* env ATTRIBUTE_UNUSED, 87 jclass cls ATTRIBUTE_UNUSED) { 88 return Runtime::Current()->IsImageDex2OatEnabled(); 89 } 90 91 // public static native boolean compiledWithOptimizing(); 92 // Did we use the optimizing compiler to compile this? 93 94 extern "C" JNIEXPORT jboolean JNICALL Java_Main_compiledWithOptimizing(JNIEnv* env, jclass cls) { 95 ScopedObjectAccess soa(env); 96 97 ObjPtr<mirror::Class> klass = soa.Decode<mirror::Class>(cls); 98 const DexFile& dex_file = klass->GetDexFile(); 99 const OatFile::OatDexFile* oat_dex_file = dex_file.GetOatDexFile(); 100 if (oat_dex_file == nullptr) { 101 // Could be JIT, which also uses optimizing, but conservatively say no. 102 return JNI_FALSE; 103 } 104 const OatFile* oat_file = oat_dex_file->GetOatFile(); 105 CHECK(oat_file != nullptr); 106 107 const char* cmd_line = oat_file->GetOatHeader().GetStoreValueByKey(OatHeader::kDex2OatCmdLineKey); 108 CHECK(cmd_line != nullptr); // Huh? This should not happen. 109 110 // Check the backend. 111 constexpr const char* kCompilerBackend = "--compiler-backend="; 112 const char* backend = strstr(cmd_line, kCompilerBackend); 113 if (backend != nullptr) { 114 // If it's set, make sure it's optimizing. 115 backend += strlen(kCompilerBackend); 116 if (strncmp(backend, "Optimizing", strlen("Optimizing")) != 0) { 117 return JNI_FALSE; 118 } 119 } 120 121 // Check the filter. 122 constexpr const char* kCompilerFilter = "--compiler-filter="; 123 const char* filter = strstr(cmd_line, kCompilerFilter); 124 if (filter != nullptr) { 125 // If it's set, make sure it's not interpret-only|verify-none|verify-at-runtime. 126 // Note: The space filter might have an impact on the test, but ignore that for now. 127 filter += strlen(kCompilerFilter); 128 constexpr const char* kInterpretOnly = "interpret-only"; 129 constexpr const char* kVerifyNone = "verify-none"; 130 constexpr const char* kVerifyAtRuntime = "verify-at-runtime"; 131 if (strncmp(filter, kInterpretOnly, strlen(kInterpretOnly)) == 0 || 132 strncmp(filter, kVerifyNone, strlen(kVerifyNone)) == 0 || 133 strncmp(filter, kVerifyAtRuntime, strlen(kVerifyAtRuntime)) == 0) { 134 return JNI_FALSE; 135 } 136 } 137 138 return JNI_TRUE; 139 } 140 141 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isAotCompiled(JNIEnv* env, 142 jclass, 143 jclass cls, 144 jstring method_name) { 145 Thread* self = Thread::Current(); 146 ScopedObjectAccess soa(self); 147 ScopedUtfChars chars(env, method_name); 148 CHECK(chars.c_str() != nullptr); 149 ArtMethod* method = soa.Decode<mirror::Class>(cls)->FindDeclaredDirectMethodByName( 150 chars.c_str(), kRuntimePointerSize); 151 return method->GetOatMethodQuickCode(kRuntimePointerSize) != nullptr; 152 } 153 154 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isJitCompiled(JNIEnv* env, 155 jclass, 156 jclass cls, 157 jstring method_name) { 158 jit::Jit* jit = GetJitIfEnabled(); 159 if (jit == nullptr) { 160 return false; 161 } 162 Thread* self = Thread::Current(); 163 ScopedObjectAccess soa(self); 164 ScopedUtfChars chars(env, method_name); 165 CHECK(chars.c_str() != nullptr); 166 ArtMethod* method = soa.Decode<mirror::Class>(cls)->FindDeclaredDirectMethodByName( 167 chars.c_str(), kRuntimePointerSize); 168 return jit->GetCodeCache()->ContainsPc(method->GetEntryPointFromQuickCompiledCode()); 169 } 170 171 extern "C" JNIEXPORT void JNICALL Java_Main_ensureJitCompiled(JNIEnv* env, 172 jclass, 173 jclass cls, 174 jstring method_name) { 175 jit::Jit* jit = GetJitIfEnabled(); 176 if (jit == nullptr) { 177 return; 178 } 179 180 Thread* self = Thread::Current(); 181 ArtMethod* method = nullptr; 182 { 183 ScopedObjectAccess soa(self); 184 185 ScopedUtfChars chars(env, method_name); 186 CHECK(chars.c_str() != nullptr); 187 method = soa.Decode<mirror::Class>(cls)->FindDeclaredDirectMethodByName( 188 chars.c_str(), kRuntimePointerSize); 189 if (method == nullptr) { 190 method = soa.Decode<mirror::Class>(cls)->FindDeclaredVirtualMethodByName( 191 chars.c_str(), kRuntimePointerSize); 192 } 193 DCHECK(method != nullptr) << "Unable to find method called " << chars.c_str(); 194 } 195 196 jit::JitCodeCache* code_cache = jit->GetCodeCache(); 197 // Update the code cache to make sure the JIT code does not get deleted. 198 // Note: this will apply to all JIT compilations. 199 code_cache->SetGarbageCollectCode(false); 200 while (true) { 201 const void* pc = method->GetEntryPointFromQuickCompiledCode(); 202 if (code_cache->ContainsPc(pc)) { 203 break; 204 } else { 205 // Sleep to yield to the compiler thread. 206 usleep(1000); 207 ScopedObjectAccess soa(self); 208 // Make sure there is a profiling info, required by the compiler. 209 ProfilingInfo::Create(self, method, /* retry_allocation */ true); 210 // Will either ensure it's compiled or do the compilation itself. 211 jit->CompileMethod(method, self, /* osr */ false); 212 } 213 } 214 } 215 216 extern "C" JNIEXPORT jboolean JNICALL Java_Main_hasSingleImplementation(JNIEnv* env, 217 jclass, 218 jclass cls, 219 jstring method_name) { 220 ArtMethod* method = nullptr; 221 ScopedObjectAccess soa(Thread::Current()); 222 ScopedUtfChars chars(env, method_name); 223 CHECK(chars.c_str() != nullptr); 224 method = soa.Decode<mirror::Class>(cls)->FindDeclaredVirtualMethodByName( 225 chars.c_str(), kRuntimePointerSize); 226 return method->HasSingleImplementation(); 227 } 228 229 extern "C" JNIEXPORT int JNICALL Java_Main_getHotnessCounter(JNIEnv* env, 230 jclass, 231 jclass cls, 232 jstring method_name) { 233 jit::Jit* jit = Runtime::Current()->GetJit(); 234 if (jit == nullptr) { 235 // The hotness counter is valid only under JIT. 236 // If we don't JIT return 0 to match test expectations. 237 return 0; 238 } 239 240 ArtMethod* method = nullptr; 241 { 242 ScopedObjectAccess soa(Thread::Current()); 243 244 ScopedUtfChars chars(env, method_name); 245 CHECK(chars.c_str() != nullptr); 246 method = soa.Decode<mirror::Class>(cls)->FindDeclaredDirectMethodByName( 247 chars.c_str(), kRuntimePointerSize); 248 } 249 250 return method->GetCounter(); 251 } 252 253 extern "C" JNIEXPORT int JNICALL Java_Main_numberOfDeoptimizations(JNIEnv*, jclass) { 254 return Runtime::Current()->GetNumberOfDeoptimizations(); 255 } 256 257 extern "C" JNIEXPORT void JNICALL Java_Main_fetchProfiles(JNIEnv*, jclass) { 258 jit::Jit* jit = GetJitIfEnabled(); 259 if (jit == nullptr) { 260 return; 261 } 262 jit::JitCodeCache* code_cache = jit->GetCodeCache(); 263 std::vector<ProfileMethodInfo> unused_vector; 264 std::set<std::string> unused_locations; 265 unused_locations.insert("fake_location"); 266 ScopedObjectAccess soa(Thread::Current()); 267 code_cache->GetProfiledMethods(unused_locations, unused_vector); 268 } 269 270 } // namespace art 271
