1 /*

     2  * Copyright (c) 2011, 2017, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 #include "precompiled.hpp"

    25 #include "memory/oopFactory.hpp"

    26 #include "memory/resourceArea.hpp"

    27 #include "oops/oop.inline.hpp"

    28 #include "prims/jvm.h"

    29 #include "runtime/javaCalls.hpp"

    30 #include "runtime/handles.hpp"

    31 #include "jvmci/jvmciJavaClasses.hpp"

    32 #include "jvmci/jvmciCompiler.hpp"

    33 #include "jvmci/jvmciEnv.hpp"

    34 #include "jvmci/jvmciRuntime.hpp"

    35 #include "runtime/compilationPolicy.hpp"

    36 #include "runtime/globals_extension.hpp"

    37 

    38 JVMCICompiler* JVMCICompiler::_instance = NULL;

    39 elapsedTimer JVMCICompiler::_codeInstallTimer;

    40 

    41 JVMCICompiler::JVMCICompiler() : AbstractCompiler(compiler_jvmci) {

    42   _bootstrapping = false;

    43   _bootstrap_compilation_request_handled = false;

    44   _methods_compiled = 0;

    45   assert(_instance == NULL, "only one instance allowed");

    46   _instance = this;

    47 }

    48 

    49 // Initialization

    50 void JVMCICompiler::initialize() {

    51   if (!UseCompiler || !EnableJVMCI || !UseJVMCICompiler || !should_perform_init()) {

    52     return;

    53   }

    54 

    55   set_state(initialized);

    56 

    57   // JVMCI is considered as application code so we need to

    58   // stop the VM deferring compilation now.

    59   CompilationPolicy::completed_vm_startup();

    60 }

    61 

    62 void JVMCICompiler::bootstrap(TRAPS) {

    63   if (Arguments::mode() == Arguments::_int) {

    64     // Nothing to do in -Xint mode

    65     return;

    66   }

    67 #ifndef PRODUCT

    68   // We turn off CompileTheWorld so that compilation requests are not

    69   // ignored during bootstrap or that JVMCI can be compiled by C1/C2.

    70   FlagSetting ctwOff(CompileTheWorld, false);

    71 #endif

    72 

    73   _bootstrapping = true;

    74   ResourceMark rm;

    75   HandleMark hm;

    76   if (PrintBootstrap) {

    77     tty->print("Bootstrapping JVMCI");

    78   }

    79   jlong start = os::javaTimeMillis();

    80 

    81   Array<Method*>* objectMethods = SystemDictionary::Object_klass()->methods();

    82   // Initialize compile queue with a selected set of methods.

    83   int len = objectMethods->length();

    84   for (int i = 0; i < len; i++) {

    85     methodHandle mh = objectMethods->at(i);

    86     if (!mh->is_native() && !mh->is_static() && !mh->is_initializer()) {

    87       ResourceMark rm;

    88       int hot_count = 10; // TODO: what's the appropriate value?

    89       CompileBroker::compile_method(mh, InvocationEntryBci, CompLevel_full_optimization, mh, hot_count, CompileTask::Reason_Bootstrap, THREAD);

    90     }

    91   }

    92 

    93   int qsize;

    94   bool first_round = true;

    95   int z = 0;

    96   do {

    97     // Loop until there is something in the queue.

    98     do {

    99       os::sleep(THREAD, 100, true);

   100       qsize = CompileBroker::queue_size(CompLevel_full_optimization);

   101     } while (!_bootstrap_compilation_request_handled && first_round && qsize == 0);

   102     first_round = false;

   103     if (PrintBootstrap) {

   104       while (z < (_methods_compiled / 100)) {

   105         ++z;

   106         tty->print_raw(".");

   107       }

   108     }

   109   } while (qsize != 0);

   110 

   111   if (PrintBootstrap) {

   112     tty->print_cr(" in " JLONG_FORMAT " ms (compiled %d methods)", os::javaTimeMillis() - start, _methods_compiled);

   113   }

   114   _bootstrapping = false;

   115   JVMCIRuntime::bootstrap_finished(CHECK);

   116 }

   117 

   118 #define CHECK_EXIT THREAD); \

   119 if (HAS_PENDING_EXCEPTION) { \

   120   char buf[256]; \

   121   jio_snprintf(buf, 256, "Uncaught exception at %s:%d", __FILE__, __LINE__); \

   122   JVMCICompiler::exit_on_pending_exception(PENDING_EXCEPTION, buf); \

   123   return; \

   124 } \

   125 (void)(0

   126 

   127 void JVMCICompiler::compile_method(const methodHandle& method, int entry_bci, JVMCIEnv* env) {

   128   JVMCI_EXCEPTION_CONTEXT

   129 

   130   bool is_osr = entry_bci != InvocationEntryBci;

   131   if (_bootstrapping && is_osr) {

   132       // no OSR compilations during bootstrap - the compiler is just too slow at this point,

   133       // and we know that there are no endless loops

   134       return;

   135   }

   136 

   137   JVMCIRuntime::initialize_well_known_classes(CHECK_EXIT);

   138 

   139   HandleMark hm;

   140   Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_EXIT);

   141 

   142   JavaValue method_result(T_OBJECT);

   143   JavaCallArguments args;

   144   args.push_long((jlong) (address) method());

   145   JavaCalls::call_static(&method_result, SystemDictionary::HotSpotResolvedJavaMethodImpl_klass(),

   146                          vmSymbols::fromMetaspace_name(), vmSymbols::method_fromMetaspace_signature(), &args, THREAD);

   147 

   148   JavaValue result(T_OBJECT);

   149   if (!HAS_PENDING_EXCEPTION) {

   150     JavaCallArguments args;

   151     args.push_oop(receiver);

   152     args.push_oop(Handle(THREAD, (oop)method_result.get_jobject()));

   153     args.push_int(entry_bci);

   154     args.push_long((jlong) (address) env);

   155     args.push_int(env->task()->compile_id());

   156     JavaCalls::call_special(&result, receiver->klass(),

   157                             vmSymbols::compileMethod_name(), vmSymbols::compileMethod_signature(), &args, THREAD);

   158   }

   159 

   160   // An uncaught exception was thrown during compilation.  Generally these

   161   // should be handled by the Java code in some useful way but if they leak

   162   // through to here report them instead of dying or silently ignoring them.

   163   if (HAS_PENDING_EXCEPTION) {

   164     Handle exception(THREAD, PENDING_EXCEPTION);

   165     CLEAR_PENDING_EXCEPTION;

   166 

   167     java_lang_Throwable::java_printStackTrace(exception, THREAD);

   168     if (HAS_PENDING_EXCEPTION) {

   169       CLEAR_PENDING_EXCEPTION;

   170     }

   171 

   172     env->set_failure("exception throw", false);

   173   } else {

   174     oop result_object = (oop) result.get_jobject();

   175     if (result_object != NULL) {

   176       oop failure_message = HotSpotCompilationRequestResult::failureMessage(result_object);

   177       if (failure_message != NULL) {

   178         const char* failure_reason = java_lang_String::as_utf8_string(failure_message);

   179         env->set_failure(failure_reason, HotSpotCompilationRequestResult::retry(result_object) != 0);

   180       } else {

   181         if (env->task()->code() == NULL) {

   182           env->set_failure("no nmethod produced", true);

   183         } else {

   184           env->task()->set_num_inlined_bytecodes(HotSpotCompilationRequestResult::inlinedBytecodes(result_object));

   185           Atomic::inc(&_methods_compiled);

   186         }

   187       }

   188     } else {

   189       assert(false, "JVMCICompiler.compileMethod should always return non-null");

   190     }

   191   }

   192   if (_bootstrapping) {

   193     _bootstrap_compilation_request_handled = true;

   194   }

   195 }

   196 

   197 CompLevel JVMCIRuntime::adjust_comp_level(const methodHandle& method, bool is_osr, CompLevel level, JavaThread* thread) {

   198   if (!thread->adjusting_comp_level()) {

   199     thread->set_adjusting_comp_level(true);

   200     level = adjust_comp_level_inner(method, is_osr, level, thread);

   201     thread->set_adjusting_comp_level(false);

   202   }

   203   return level;

   204 }

   205 

   206 void JVMCICompiler::exit_on_pending_exception(oop exception, const char* message) {

   207   JavaThread* THREAD = JavaThread::current();

   208   CLEAR_PENDING_EXCEPTION;

   209 

   210   static volatile int report_error = 0;

   211   if (!report_error && Atomic::cmpxchg(1, &report_error, 0) == 0) {

   212     // Only report an error once

   213     tty->print_raw_cr(message);

   214     Handle ex(THREAD, exception);

   215     java_lang_Throwable::java_printStackTrace(ex, THREAD);

   216   } else {

   217     // Allow error reporting thread to print the stack trace.

   218     os::sleep(THREAD, 200, false);

   219   }

   220 

   221   before_exit(THREAD);

   222   vm_exit(-1);

   223 }

   224 

   225 // Compilation entry point for methods

   226 void JVMCICompiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci, DirectiveSet* directive) {

   227   ShouldNotReachHere();

   228 }

   229 

   230 bool JVMCICompiler::is_trivial(Method* method) {

   231   if (_bootstrapping) {

   232     return false;

   233   }

   234   return JVMCIRuntime::treat_as_trivial(method);

   235 }

   236 

   237 // Print compilation timers and statistics

   238 void JVMCICompiler::print_timers() {

   239   print_compilation_timers();

   240 }

   241 

   242 // Print compilation timers and statistics

   243 void JVMCICompiler::print_compilation_timers() {

   244   TRACE_jvmci_1("JVMCICompiler::print_timers");

   245   tty->print_cr("       JVMCI code install time:        %6.3f s",    _codeInstallTimer.seconds());

   246 }