src/hotspot/share/jvmci/jvmciCompiler.cpp
author herrick
Wed, 27 Mar 2019 08:27:58 -0400
branchJDK-8200758-branch
changeset 57288 0be43184f52a
parent 53417 126c5e7b97b1
child 54647 c0d9bc9b4e1f
permissions -rw-r--r--
Merge
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/*
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 * Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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#include "precompiled.hpp"
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#include "jvm.h"
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#include "memory/oopFactory.hpp"
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#include "memory/resourceArea.hpp"
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#include "oops/oop.inline.hpp"
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#include "runtime/javaCalls.hpp"
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#include "runtime/handles.hpp"
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#include "jvmci/jvmciJavaClasses.hpp"
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#include "jvmci/jvmciCompiler.hpp"
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#include "jvmci/jvmciEnv.hpp"
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#include "jvmci/jvmciRuntime.hpp"
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#include "runtime/compilationPolicy.hpp"
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#include "runtime/globals_extension.hpp"
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#include "runtime/handles.inline.hpp"
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JVMCICompiler* JVMCICompiler::_instance = NULL;
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elapsedTimer JVMCICompiler::_codeInstallTimer;
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JVMCICompiler::JVMCICompiler() : AbstractCompiler(compiler_jvmci) {
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  _bootstrapping = false;
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  _bootstrap_compilation_request_handled = false;
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  _methods_compiled = 0;
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  assert(_instance == NULL, "only one instance allowed");
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  _instance = this;
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}
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// Initialization
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void JVMCICompiler::initialize() {
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  if (!UseCompiler || !EnableJVMCI || !UseJVMCICompiler || !should_perform_init()) {
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    return;
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  }
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  set_state(initialized);
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}
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void JVMCICompiler::bootstrap(TRAPS) {
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  if (Arguments::mode() == Arguments::_int) {
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    // Nothing to do in -Xint mode
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    return;
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  }
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  _bootstrapping = true;
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  ResourceMark rm;
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  HandleMark hm;
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  if (PrintBootstrap) {
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    tty->print("Bootstrapping JVMCI");
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  }
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  jlong start = os::javaTimeMillis();
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  Array<Method*>* objectMethods = SystemDictionary::Object_klass()->methods();
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  // Initialize compile queue with a selected set of methods.
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  int len = objectMethods->length();
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  for (int i = 0; i < len; i++) {
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    methodHandle mh = objectMethods->at(i);
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    if (!mh->is_native() && !mh->is_static() && !mh->is_initializer()) {
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      ResourceMark rm;
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      int hot_count = 10; // TODO: what's the appropriate value?
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      CompileBroker::compile_method(mh, InvocationEntryBci, CompLevel_full_optimization, mh, hot_count, CompileTask::Reason_Bootstrap, THREAD);
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    }
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  }
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  int qsize;
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  bool first_round = true;
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  int z = 0;
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  do {
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    // Loop until there is something in the queue.
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    do {
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      os::sleep(THREAD, 100, true);
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      qsize = CompileBroker::queue_size(CompLevel_full_optimization);
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    } while (!_bootstrap_compilation_request_handled && first_round && qsize == 0);
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    first_round = false;
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    if (PrintBootstrap) {
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      while (z < (_methods_compiled / 100)) {
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        ++z;
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        tty->print_raw(".");
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      }
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    }
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  } while (qsize != 0);
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  if (PrintBootstrap) {
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    tty->print_cr(" in " JLONG_FORMAT " ms (compiled %d methods)", os::javaTimeMillis() - start, _methods_compiled);
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  }
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  _bootstrapping = false;
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  JVMCIRuntime::bootstrap_finished(CHECK);
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}
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#define CHECK_EXIT THREAD); \
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if (HAS_PENDING_EXCEPTION) { \
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  char buf[256]; \
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  jio_snprintf(buf, 256, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
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  JVMCICompiler::exit_on_pending_exception(PENDING_EXCEPTION, buf); \
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  return; \
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} \
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(void)(0
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void JVMCICompiler::compile_method(const methodHandle& method, int entry_bci, JVMCIEnv* env) {
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  JVMCI_EXCEPTION_CONTEXT
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  bool is_osr = entry_bci != InvocationEntryBci;
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  if (_bootstrapping && is_osr) {
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      // no OSR compilations during bootstrap - the compiler is just too slow at this point,
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      // and we know that there are no endless loops
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      env->set_failure(true, "No OSR during boostrap");
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      return;
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  }
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  JVMCIRuntime::initialize_well_known_classes(CHECK_EXIT);
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  HandleMark hm;
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  Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_EXIT);
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  JavaValue method_result(T_OBJECT);
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  JavaCallArguments args;
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  args.push_long((jlong) (address) method());
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  JavaCalls::call_static(&method_result, SystemDictionary::HotSpotResolvedJavaMethodImpl_klass(),
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                         vmSymbols::fromMetaspace_name(), vmSymbols::method_fromMetaspace_signature(), &args, THREAD);
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  JavaValue result(T_OBJECT);
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  if (!HAS_PENDING_EXCEPTION) {
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    JavaCallArguments args;
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    args.push_oop(receiver);
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    args.push_oop(Handle(THREAD, (oop)method_result.get_jobject()));
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    args.push_int(entry_bci);
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    args.push_long((jlong) (address) env);
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    args.push_int(env->task()->compile_id());
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    JavaCalls::call_special(&result, receiver->klass(),
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                            vmSymbols::compileMethod_name(), vmSymbols::compileMethod_signature(), &args, THREAD);
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  }
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  // An uncaught exception was thrown during compilation.  Generally these
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  // should be handled by the Java code in some useful way but if they leak
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  // through to here report them instead of dying or silently ignoring them.
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  if (HAS_PENDING_EXCEPTION) {
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    Handle exception(THREAD, PENDING_EXCEPTION);
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    CLEAR_PENDING_EXCEPTION;
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    java_lang_Throwable::java_printStackTrace(exception, THREAD);
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    if (HAS_PENDING_EXCEPTION) {
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      CLEAR_PENDING_EXCEPTION;
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    }
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    env->set_failure(false, "unexpected exception thrown");
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  } else {
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    oop result_object = (oop) result.get_jobject();
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    if (result_object != NULL) {
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      oop failure_message = HotSpotCompilationRequestResult::failureMessage(result_object);
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      if (failure_message != NULL) {
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        // Copy failure reason into resource memory first ...
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        const char* failure_reason = java_lang_String::as_utf8_string(failure_message);
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        // ... and then into the C heap.
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        failure_reason = os::strdup(failure_reason, mtCompiler);
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        bool retryable = HotSpotCompilationRequestResult::retry(result_object) != 0;
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        env->set_failure(retryable, failure_reason, true);
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      } else {
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        if (env->task()->code() == NULL) {
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          env->set_failure(true, "no nmethod produced");
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        } else {
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          env->task()->set_num_inlined_bytecodes(HotSpotCompilationRequestResult::inlinedBytecodes(result_object));
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          Atomic::inc(&_methods_compiled);
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        }
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      }
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    } else {
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      assert(false, "JVMCICompiler.compileMethod should always return non-null");
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    }
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  }
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  if (_bootstrapping) {
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    _bootstrap_compilation_request_handled = true;
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  }
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}
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CompLevel JVMCIRuntime::adjust_comp_level(const methodHandle& method, bool is_osr, CompLevel level, JavaThread* thread) {
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  if (!thread->adjusting_comp_level()) {
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    thread->set_adjusting_comp_level(true);
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    level = adjust_comp_level_inner(method, is_osr, level, thread);
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    thread->set_adjusting_comp_level(false);
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  }
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  return level;
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}
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void JVMCICompiler::exit_on_pending_exception(oop exception, const char* message) {
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  JavaThread* THREAD = JavaThread::current();
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  CLEAR_PENDING_EXCEPTION;
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  static volatile int report_error = 0;
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  if (!report_error && Atomic::cmpxchg(1, &report_error, 0) == 0) {
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    // Only report an error once
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    tty->print_raw_cr(message);
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    Handle ex(THREAD, exception);
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    java_lang_Throwable::java_printStackTrace(ex, THREAD);
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  } else {
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    // Allow error reporting thread to print the stack trace.  Windows
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    // doesn't allow uninterruptible wait for JavaThreads
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    const bool interruptible = true;
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    os::sleep(THREAD, 200, interruptible);
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  }
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  before_exit(THREAD);
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  vm_exit(-1);
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}
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// Compilation entry point for methods
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void JVMCICompiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci, DirectiveSet* directive) {
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  ShouldNotReachHere();
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}
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// Print compilation timers and statistics
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void JVMCICompiler::print_timers() {
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  print_compilation_timers();
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}
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// Print compilation timers and statistics
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void JVMCICompiler::print_compilation_timers() {
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  TRACE_jvmci_1("JVMCICompiler::print_timers");
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  tty->print_cr("       JVMCI code install time:        %6.3f s",    _codeInstallTimer.seconds());
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}