1 /*
   2  * Copyright (c) 2011, 2016, 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 "runtime/javaCalls.hpp"
  29 #include "runtime/handles.hpp"
  30 #include "jvmci/jvmciJavaClasses.hpp"
  31 #include "jvmci/jvmciCompiler.hpp"
  32 #include "jvmci/jvmciEnv.hpp"
  33 #include "jvmci/jvmciRuntime.hpp"
  34 #include "runtime/compilationPolicy.hpp"
  35 #include "runtime/globals_extension.hpp"
  36 
  37 JVMCICompiler* JVMCICompiler::_instance = NULL;
  38 elapsedTimer JVMCICompiler::_codeInstallTimer;
  39 
  40 JVMCICompiler::JVMCICompiler() : AbstractCompiler(jvmci) {
  41   _bootstrapping = false;
  42   _methods_compiled = 0;
  43   assert(_instance == NULL, "only one instance allowed");
  44   _instance = this;
  45 }
  46 
  47 // Initialization
  48 void JVMCICompiler::initialize() {
  49   if (!UseCompiler || !EnableJVMCI || !UseJVMCICompiler || !should_perform_init()) {
  50     return;
  51   }
  52 
  53   set_state(initialized);
  54 
  55   // JVMCI is considered as application code so we need to
  56   // stop the VM deferring compilation now.
  57   CompilationPolicy::completed_vm_startup();
  58 }
  59 
  60 void JVMCICompiler::bootstrap() {
  61   if (Arguments::mode() == Arguments::_int) {
  62     // Nothing to do in -Xint mode
  63     return;
  64   }
  65 #ifndef PRODUCT
  66   // We turn off CompileTheWorld so that compilation requests are not
  67   // ignored during bootstrap or that JVMCI can be compiled by C1/C2.
  68   FlagSetting ctwOff(CompileTheWorld, false);
  69 #endif
  70 
  71   JavaThread* THREAD = JavaThread::current();
  72   _bootstrapping = true;
  73   ResourceMark rm;
  74   HandleMark hm;
  75   if (PrintBootstrap) {
  76     tty->print("Bootstrapping JVMCI");
  77   }
  78   jlong start = os::javaTimeMillis();
  79 
  80   Array<Method*>* objectMethods = SystemDictionary::Object_klass()->methods();
  81   // Initialize compile queue with a selected set of methods.
  82   int len = objectMethods->length();
  83   for (int i = 0; i < len; i++) {
  84     methodHandle mh = objectMethods->at(i);
  85     if (!mh->is_native() && !mh->is_static() && !mh->is_initializer()) {
  86       ResourceMark rm;
  87       int hot_count = 10; // TODO: what's the appropriate value?
  88       CompileBroker::compile_method(mh, InvocationEntryBci, CompLevel_full_optimization, mh, hot_count, "bootstrap", THREAD);
  89     }
  90   }
  91 
  92   int qsize;
  93   bool first_round = true;
  94   int z = 0;
  95   do {
  96     // Loop until there is something in the queue.
  97     do {
  98       os::sleep(THREAD, 100, true);
  99       qsize = CompileBroker::queue_size(CompLevel_full_optimization);
 100     } while (first_round && qsize == 0);
 101     first_round = false;
 102     if (PrintBootstrap) {
 103       while (z < (_methods_compiled / 100)) {
 104         ++z;
 105         tty->print_raw(".");
 106       }
 107     }
 108   } while (qsize != 0);
 109 
 110   if (PrintBootstrap) {
 111     tty->print_cr(" in " JLONG_FORMAT " ms (compiled %d methods)", os::javaTimeMillis() - start, _methods_compiled);
 112   }
 113   _bootstrapping = false;
 114 }
 115 
 116 #define CHECK_ABORT THREAD); \
 117 if (HAS_PENDING_EXCEPTION) { \
 118   char buf[256]; \
 119   jio_snprintf(buf, 256, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
 120   JVMCICompiler::abort_on_pending_exception(PENDING_EXCEPTION, buf); \
 121   return; \
 122 } \
 123 (void)(0
 124 
 125 void JVMCICompiler::compile_method(const methodHandle& method, int entry_bci, JVMCIEnv* env) {
 126   JVMCI_EXCEPTION_CONTEXT
 127 
 128   bool is_osr = entry_bci != InvocationEntryBci;
 129   if (_bootstrapping && is_osr) {
 130       // no OSR compilations during bootstrap - the compiler is just too slow at this point,
 131       // and we know that there are no endless loops
 132       return;
 133   }
 134 
 135   JVMCIRuntime::initialize_well_known_classes(CHECK_ABORT);
 136 
 137   HandleMark hm;
 138   Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_ABORT);
 139 
 140   JavaValue method_result(T_OBJECT);
 141   JavaCallArguments args;
 142   args.push_long((jlong) (address) method());
 143   JavaCalls::call_static(&method_result, SystemDictionary::HotSpotResolvedJavaMethodImpl_klass(),
 144                          vmSymbols::fromMetaspace_name(), vmSymbols::method_fromMetaspace_signature(), &args, THREAD);
 145 
 146   JavaValue result(T_OBJECT);
 147   if (!HAS_PENDING_EXCEPTION) {
 148     JavaCallArguments args;
 149     args.push_oop(receiver);
 150     args.push_oop((oop)method_result.get_jobject());
 151     args.push_int(entry_bci);
 152     args.push_long((jlong) (address) env);
 153     args.push_int(env->task()->compile_id());
 154     JavaCalls::call_special(&result, receiver->klass(),
 155                             vmSymbols::compileMethod_name(), vmSymbols::compileMethod_signature(), &args, THREAD);
 156   }
 157 
 158   // An uncaught exception was thrown during compilation.  Generally these
 159   // should be handled by the Java code in some useful way but if they leak
 160   // through to here report them instead of dying or silently ignoring them.
 161   if (HAS_PENDING_EXCEPTION) {
 162     Handle exception(THREAD, PENDING_EXCEPTION);
 163     CLEAR_PENDING_EXCEPTION;
 164 
 165     java_lang_Throwable::java_printStackTrace(exception, THREAD);
 166 
 167     env->set_failure("exception throw", false);
 168   } else {
 169     oop result_object = (oop) result.get_jobject();
 170     if (result_object != NULL) {
 171       oop failure_message = CompilationRequestResult::failureMessage(result_object);
 172       if (failure_message != NULL) {
 173         const char* failure_reason = java_lang_String::as_utf8_string(failure_message);
 174         env->set_failure(failure_reason, CompilationRequestResult::retry(result_object) != 0);
 175       } else {
 176         if (env->task()->code() == NULL) {
 177           env->set_failure("no nmethod produced", true);
 178         } else {
 179           env->task()->set_num_inlined_bytecodes(CompilationRequestResult::inlinedBytecodes(result_object));
 180           Atomic::inc(&_methods_compiled);
 181         }
 182       }
 183     } else {
 184       assert(false, "JVMCICompiler.compileMethod should always return non-null");
 185     }
 186   }
 187 }
 188 
 189 /**
 190  * Aborts the VM due to an unexpected exception.
 191  */
 192 void JVMCICompiler::abort_on_pending_exception(Handle exception, const char* message, bool dump_core) {
 193   Thread* THREAD = Thread::current();
 194   CLEAR_PENDING_EXCEPTION;
 195 
 196   java_lang_Throwable::java_printStackTrace(exception, THREAD);
 197 
 198   // Give other aborting threads to also print their stack traces.
 199   // This can be very useful when debugging class initialization
 200   // failures.
 201   assert(THREAD->is_Java_thread(), "compiler threads should be Java threads");
 202   const bool interruptible = true;
 203   os::sleep(THREAD, 200, interruptible);
 204 
 205   vm_abort(dump_core);
 206 }
 207 
 208 // Compilation entry point for methods
 209 void JVMCICompiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci, DirectiveSet* directive) {
 210   ShouldNotReachHere();
 211 }
 212 
 213 bool JVMCICompiler::is_trivial(Method* method) {
 214   if (_bootstrapping) {
 215     return false;
 216   }
 217   return JVMCIRuntime::treat_as_trivial(method);
 218 }
 219 
 220 // Print compilation timers and statistics
 221 void JVMCICompiler::print_timers() {
 222   print_compilation_timers();
 223 }
 224 
 225 // Print compilation timers and statistics
 226 void JVMCICompiler::print_compilation_timers() {
 227   TRACE_jvmci_1("JVMCICompiler::print_timers");
 228   tty->print_cr("       JVMCI code install time:        %6.3f s",    _codeInstallTimer.seconds());
 229 }