/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "jni.h"
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#include <android-base/logging.h>
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#include <android-base/macros.h>
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#include "art_method-inl.h"
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#include "base/enums.h"
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#include "common_throws.h"
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#include "dex/dex_file-inl.h"
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#include "instrumentation.h"
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#include "jit/jit.h"
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#include "jit/jit_code_cache.h"
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#include "jit/profiling_info.h"
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#include "jni/jni_internal.h"
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#include "mirror/class-inl.h"
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#include "nativehelper/ScopedUtfChars.h"
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#include "oat_file.h"
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#include "oat_quick_method_header.h"
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#include "profile/profile_compilation_info.h"
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#include "runtime.h"
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#include "scoped_thread_state_change-inl.h"
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#include "thread-current-inl.h"
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namespace art {
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// public static native boolean hasJit();
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static jit::Jit* GetJitIfEnabled() {
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Runtime* runtime = Runtime::Current();
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bool can_jit =
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runtime != nullptr
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&& runtime->GetJit() != nullptr
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&& runtime->GetInstrumentation()->GetCurrentInstrumentationLevel() !=
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instrumentation::Instrumentation::InstrumentationLevel::kInstrumentWithInterpreter;
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return can_jit ? runtime->GetJit() : nullptr;
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}
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extern "C" JNIEXPORT jboolean JNICALL Java_Main_hasJit(JNIEnv*, jclass) {
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return GetJitIfEnabled() != nullptr;
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}
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// public static native boolean hasOatFile();
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extern "C" JNIEXPORT jboolean JNICALL Java_Main_hasOatFile(JNIEnv* env, jclass cls) {
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ScopedObjectAccess soa(env);
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ObjPtr<mirror::Class> klass = soa.Decode<mirror::Class>(cls);
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const DexFile& dex_file = klass->GetDexFile();
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const OatDexFile* oat_dex_file = dex_file.GetOatDexFile();
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return (oat_dex_file != nullptr) ? JNI_TRUE : JNI_FALSE;
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}
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// public static native boolean runtimeIsSoftFail();
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extern "C" JNIEXPORT jboolean JNICALL Java_Main_runtimeIsSoftFail(JNIEnv* env ATTRIBUTE_UNUSED,
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jclass cls ATTRIBUTE_UNUSED) {
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return Runtime::Current()->IsVerificationSoftFail() ? JNI_TRUE : JNI_FALSE;
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}
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// public static native boolean hasImage();
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extern "C" JNIEXPORT jboolean JNICALL Java_Main_hasImage(JNIEnv* env ATTRIBUTE_UNUSED,
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jclass cls ATTRIBUTE_UNUSED) {
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return Runtime::Current()->GetHeap()->HasBootImageSpace();
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}
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// public static native boolean isImageDex2OatEnabled();
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extern "C" JNIEXPORT jboolean JNICALL Java_Main_isImageDex2OatEnabled(JNIEnv* env ATTRIBUTE_UNUSED,
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jclass cls ATTRIBUTE_UNUSED) {
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return Runtime::Current()->IsImageDex2OatEnabled();
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}
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// public static native boolean compiledWithOptimizing();
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// Did we use the optimizing compiler to compile this?
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extern "C" JNIEXPORT jboolean JNICALL Java_Main_compiledWithOptimizing(JNIEnv* env, jclass cls) {
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ScopedObjectAccess soa(env);
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ObjPtr<mirror::Class> klass = soa.Decode<mirror::Class>(cls);
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const DexFile& dex_file = klass->GetDexFile();
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const OatDexFile* oat_dex_file = dex_file.GetOatDexFile();
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if (oat_dex_file == nullptr) {
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// Could be JIT, which also uses optimizing, but conservatively say no.
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return JNI_FALSE;
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}
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const OatFile* oat_file = oat_dex_file->GetOatFile();
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CHECK(oat_file != nullptr);
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const char* cmd_line = oat_file->GetOatHeader().GetStoreValueByKey(OatHeader::kDex2OatCmdLineKey);
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CHECK(cmd_line != nullptr); // Huh? This should not happen.
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// Check the backend.
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constexpr const char* kCompilerBackend = "--compiler-backend=";
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const char* backend = strstr(cmd_line, kCompilerBackend);
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if (backend != nullptr) {
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// If it's set, make sure it's optimizing.
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backend += strlen(kCompilerBackend);
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if (strncmp(backend, "Optimizing", strlen("Optimizing")) != 0) {
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return JNI_FALSE;
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}
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}
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// Check the filter.
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constexpr const char* kCompilerFilter = "--compiler-filter=";
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const char* filter = strstr(cmd_line, kCompilerFilter);
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if (filter != nullptr) {
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// If it's set, make sure it's not interpret-only|verify-none|verify-at-runtime.
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// Note: The space filter might have an impact on the test, but ignore that for now.
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filter += strlen(kCompilerFilter);
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constexpr const char* kInterpretOnly = "interpret-only";
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constexpr const char* kVerifyNone = "verify-none";
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constexpr const char* kVerifyAtRuntime = "verify-at-runtime";
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constexpr const char* kQuicken = "quicken";
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constexpr const char* kExtract = "extract";
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if (strncmp(filter, kInterpretOnly, strlen(kInterpretOnly)) == 0 ||
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strncmp(filter, kVerifyNone, strlen(kVerifyNone)) == 0 ||
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strncmp(filter, kVerifyAtRuntime, strlen(kVerifyAtRuntime)) == 0 ||
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strncmp(filter, kExtract, strlen(kExtract)) == 0 ||
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strncmp(filter, kQuicken, strlen(kQuicken)) == 0) {
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return JNI_FALSE;
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}
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}
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return JNI_TRUE;
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}
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extern "C" JNIEXPORT jboolean JNICALL Java_Main_isAotCompiled(JNIEnv* env,
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jclass,
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jclass cls,
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jstring method_name) {
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Thread* self = Thread::Current();
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ScopedObjectAccess soa(self);
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ScopedUtfChars chars(env, method_name);
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CHECK(chars.c_str() != nullptr);
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ArtMethod* method = soa.Decode<mirror::Class>(cls)->FindDeclaredDirectMethodByName(
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chars.c_str(), kRuntimePointerSize);
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const void* oat_code = method->GetOatMethodQuickCode(kRuntimePointerSize);
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if (oat_code == nullptr) {
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return false;
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}
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const void* actual_code = method->GetEntryPointFromQuickCompiledCodePtrSize(kRuntimePointerSize);
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bool interpreter =
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Runtime::Current()->GetClassLinker()->ShouldUseInterpreterEntrypoint(method, actual_code);
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return !interpreter;
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}
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static ArtMethod* GetMethod(ScopedObjectAccess& soa, jclass cls, const ScopedUtfChars& chars)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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CHECK(chars.c_str() != nullptr);
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ArtMethod* method = soa.Decode<mirror::Class>(cls)->FindDeclaredDirectMethodByName(
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chars.c_str(), kRuntimePointerSize);
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if (method == nullptr) {
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method = soa.Decode<mirror::Class>(cls)->FindDeclaredVirtualMethodByName(
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chars.c_str(), kRuntimePointerSize);
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}
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DCHECK(method != nullptr) << "Unable to find method called " << chars.c_str();
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return method;
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}
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extern "C" JNIEXPORT jboolean JNICALL Java_Main_hasJitCompiledEntrypoint(JNIEnv* env,
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jclass,
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jclass cls,
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jstring method_name) {
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jit::Jit* jit = GetJitIfEnabled();
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if (jit == nullptr) {
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return false;
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}
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Thread* self = Thread::Current();
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ScopedObjectAccess soa(self);
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ScopedUtfChars chars(env, method_name);
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ArtMethod* method = GetMethod(soa, cls, chars);
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ScopedAssertNoThreadSuspension sants(__FUNCTION__);
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return jit->GetCodeCache()->ContainsPc(
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Runtime::Current()->GetInstrumentation()->GetCodeForInvoke(method));
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}
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extern "C" JNIEXPORT jboolean JNICALL Java_Main_hasJitCompiledCode(JNIEnv* env,
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jclass,
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jclass cls,
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jstring method_name) {
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jit::Jit* jit = GetJitIfEnabled();
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if (jit == nullptr) {
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return false;
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}
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Thread* self = Thread::Current();
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ScopedObjectAccess soa(self);
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ScopedUtfChars chars(env, method_name);
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ArtMethod* method = GetMethod(soa, cls, chars);
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return jit->GetCodeCache()->ContainsMethod(method);
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}
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static void ForceJitCompiled(Thread* self, ArtMethod* method) REQUIRES(!Locks::mutator_lock_) {
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bool native = false;
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{
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ScopedObjectAccess soa(self);
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if (method->IsNative()) {
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native = true;
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} else if (!Runtime::Current()->GetRuntimeCallbacks()->IsMethodSafeToJit(method)) {
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std::string msg(method->PrettyMethod());
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msg += ": is not safe to jit!";
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ThrowIllegalStateException(msg.c_str());
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return;
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}
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// We force initialization of the declaring class to make sure the method doesn't keep
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// the resolution stub as entrypoint.
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StackHandleScope<1> hs(self);
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Handle<mirror::Class> h_klass(hs.NewHandle(method->GetDeclaringClass()));
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if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(self, h_klass, true, true)) {
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self->AssertPendingException();
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return;
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}
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}
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jit::Jit* jit = GetJitIfEnabled();
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jit::JitCodeCache* code_cache = jit->GetCodeCache();
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// Update the code cache to make sure the JIT code does not get deleted.
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// Note: this will apply to all JIT compilations.
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code_cache->SetGarbageCollectCode(false);
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while (true) {
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if (native && code_cache->ContainsMethod(method)) {
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break;
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} else if (code_cache->WillExecuteJitCode(method)) {
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break;
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} else {
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// Sleep to yield to the compiler thread.
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usleep(1000);
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ScopedObjectAccess soa(self);
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if (!native) {
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// Make sure there is a profiling info, required by the compiler.
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ProfilingInfo::Create(self, method, /* retry_allocation */ true);
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}
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// Will either ensure it's compiled or do the compilation itself.
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jit->CompileMethod(method, self, /*baseline=*/ false, /*osr=*/ false);
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}
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}
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}
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extern "C" JNIEXPORT void JNICALL Java_Main_ensureMethodJitCompiled(JNIEnv*, jclass, jobject meth) {
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jit::Jit* jit = GetJitIfEnabled();
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if (jit == nullptr) {
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return;
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}
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Thread* self = Thread::Current();
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ArtMethod* method;
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{
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ScopedObjectAccess soa(self);
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method = ArtMethod::FromReflectedMethod(soa, meth);
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}
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ForceJitCompiled(self, method);
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}
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extern "C" JNIEXPORT void JNICALL Java_Main_ensureJitCompiled(JNIEnv* env,
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jclass,
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jclass cls,
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jstring method_name) {
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jit::Jit* jit = GetJitIfEnabled();
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if (jit == nullptr) {
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return;
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}
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Thread* self = Thread::Current();
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ArtMethod* method = nullptr;
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{
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ScopedObjectAccess soa(self);
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ScopedUtfChars chars(env, method_name);
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method = GetMethod(soa, cls, chars);
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}
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ForceJitCompiled(self, method);
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}
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extern "C" JNIEXPORT jboolean JNICALL Java_Main_hasSingleImplementation(JNIEnv* env,
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jclass,
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jclass cls,
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jstring method_name) {
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ArtMethod* method = nullptr;
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ScopedObjectAccess soa(Thread::Current());
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ScopedUtfChars chars(env, method_name);
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CHECK(chars.c_str() != nullptr);
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method = soa.Decode<mirror::Class>(cls)->FindDeclaredVirtualMethodByName(
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chars.c_str(), kRuntimePointerSize);
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return method->HasSingleImplementation();
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}
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extern "C" JNIEXPORT int JNICALL Java_Main_getHotnessCounter(JNIEnv* env,
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jclass,
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jclass cls,
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jstring method_name) {
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ScopedObjectAccess soa(Thread::Current());
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ScopedUtfChars chars(env, method_name);
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CHECK(chars.c_str() != nullptr);
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ArtMethod* method =
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soa.Decode<mirror::Class>(cls)->FindDeclaredDirectMethodByName(chars.c_str(),
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kRuntimePointerSize);
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if (method != nullptr) {
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return method->GetCounter();
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}
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method = soa.Decode<mirror::Class>(cls)->FindDeclaredVirtualMethodByName(chars.c_str(),
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kRuntimePointerSize);
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if (method != nullptr) {
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return method->GetCounter();
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}
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return std::numeric_limits<int32_t>::min();
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}
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extern "C" JNIEXPORT int JNICALL Java_Main_numberOfDeoptimizations(JNIEnv*, jclass) {
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return Runtime::Current()->GetNumberOfDeoptimizations();
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}
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extern "C" JNIEXPORT void JNICALL Java_Main_fetchProfiles(JNIEnv*, jclass) {
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jit::Jit* jit = GetJitIfEnabled();
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if (jit == nullptr) {
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return;
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}
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jit::JitCodeCache* code_cache = jit->GetCodeCache();
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std::vector<ProfileMethodInfo> unused_vector;
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std::set<std::string> unused_locations;
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unused_locations.insert("fake_location");
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ScopedObjectAccess soa(Thread::Current());
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code_cache->GetProfiledMethods(unused_locations, unused_vector);
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}
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extern "C" JNIEXPORT void JNICALL Java_Main_waitForCompilation(JNIEnv*, jclass) {
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jit::Jit* jit = Runtime::Current()->GetJit();
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if (jit != nullptr) {
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jit->WaitForCompilationToFinish(Thread::Current());
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}
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}
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extern "C" JNIEXPORT void JNICALL Java_Main_stopJit(JNIEnv*, jclass) {
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jit::Jit* jit = Runtime::Current()->GetJit();
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if (jit != nullptr) {
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jit->Stop();
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}
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}
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extern "C" JNIEXPORT void JNICALL Java_Main_startJit(JNIEnv*, jclass) {
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jit::Jit* jit = Runtime::Current()->GetJit();
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if (jit != nullptr) {
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jit->Start();
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}
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}
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extern "C" JNIEXPORT jint JNICALL Java_Main_getJitThreshold(JNIEnv*, jclass) {
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jit::Jit* jit = Runtime::Current()->GetJit();
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return (jit != nullptr) ? jit->HotMethodThreshold() : 0;
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}
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extern "C" JNIEXPORT void JNICALL Java_Main_transitionJitFromZygote(JNIEnv*, jclass) {
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jit::Jit* jit = Runtime::Current()->GetJit();
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if (jit == nullptr) {
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return;
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}
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// Mimic the transition behavior a zygote fork would have.
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jit->PreZygoteFork();
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jit->GetCodeCache()->PostForkChildAction(/*is_system_server=*/ false, /*is_zygote=*/ false);
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jit->PostForkChildAction(/*is_system_server=*/ false, /*is_zygote=*/ false);
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}
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extern "C" JNIEXPORT void JNICALL Java_Main_deoptimizeBootImage(JNIEnv*, jclass) {
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ScopedSuspendAll ssa(__FUNCTION__);
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Runtime::Current()->DeoptimizeBootImage();
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}
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extern "C" JNIEXPORT jboolean JNICALL Java_Main_isDebuggable(JNIEnv*, jclass) {
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return Runtime::Current()->IsJavaDebuggable() ? JNI_TRUE : JNI_FALSE;
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}
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extern "C" JNIEXPORT void JNICALL Java_Main_setTargetSdkVersion(JNIEnv*, jclass, jint version) {
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Runtime::Current()->SetTargetSdkVersion(static_cast<uint32_t>(version));
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}
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} // namespace art
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