C++ methodHandle::is_not_osr_compilable方法代码示例

// Returns true if m is allowed to be osr compiled
bool CompilationPolicy::can_be_osr_compiled(methodHandle m, int comp_level) {
  bool result = false;
  if (comp_level == CompLevel_all) {
    if (TieredCompilation) {
      // enough to be osr compilable at any level for tiered
      result = !m->is_not_osr_compilable(CompLevel_simple) || !m->is_not_osr_compilable(CompLevel_full_optimization);
    } else {
      // must be osr compilable at available level for non-tiered
      result = !m->is_not_osr_compilable(CompLevel_highest_tier);
    }
  } else if (is_compile(comp_level)) {
    result = !m->is_not_osr_compilable(comp_level);
  }
  return (result && can_be_compiled(m, comp_level));
}

// Check if the method can be compiled, change level if necessary
void SimpleThresholdPolicy::compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread) {
  assert(level <= TieredStopAtLevel, "Invalid compilation level");
  if (level == CompLevel_none) {
    return;
  }
  // Check if the method can be compiled. If it cannot be compiled with C1, continue profiling
  // in the interpreter and then compile with C2 (the transition function will request that,
  // see common() ). If the method cannot be compiled with C2 but still can with C1, compile it with
  // pure C1.
  if (!can_be_compiled(mh, level)) {
    if (level == CompLevel_full_optimization && can_be_compiled(mh, CompLevel_simple)) {
        compile(mh, bci, CompLevel_simple, thread);
    }
    return;
  }
  if (bci != InvocationEntryBci && mh->is_not_osr_compilable(level)) {
    return;
  }
  if (!CompileBroker::compilation_is_in_queue(mh)) {
    if (PrintTieredEvents) {
      print_event(COMPILE, mh, mh, bci, level);
    }
    submit_compile(mh, bci, level, thread);
  }
}

void SimpleCompPolicy::method_back_branch_event(methodHandle m, int bci, JavaThread* thread) {
    int hot_count = m->backedge_count();
    const char* comment = "backedge_count";

    if (is_compilation_enabled() && !m->is_not_osr_compilable() && can_be_compiled(m)) {
        CompileBroker::compile_method(m, bci, CompLevel_highest_tier,
                                      m, hot_count, comment, thread);
        NOT_PRODUCT(trace_osr_completion(m->lookup_osr_nmethod_for(bci, CompLevel_highest_tier, true));)
    }

void SimpleCompPolicy::method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS) {
  assert(UseCompiler || CompileTheWorld, "UseCompiler should be set by now.");

  int hot_count = m->backedge_count();
  const char* comment = "backedge_count";

  if (!m->is_not_osr_compilable() && !delayCompilationDuringStartup() && canBeCompiled(m)) {
    CompileBroker::compile_method(m, loop_top_bci, m, hot_count, comment, CHECK);

    NOT_PRODUCT(trace_osr_completion(m->lookup_osr_nmethod_for(loop_top_bci));)
  }

// Print an event.
void SimpleThresholdPolicy::print_event(EventType type, methodHandle mh, methodHandle imh,
                                        int bci, CompLevel level) {
  bool inlinee_event = mh() != imh();

  ttyLocker tty_lock;
  tty->print("%lf: [", os::elapsedTime());

  switch(type) {
  case CALL:
    tty->print("call");
    break;
  case LOOP:
    tty->print("loop");
    break;
  case COMPILE:
    tty->print("compile");
    break;
  case REMOVE_FROM_QUEUE:
    tty->print("remove-from-queue");
    break;
  case UPDATE_IN_QUEUE:
    tty->print("update-in-queue");
    break;
  case REPROFILE:
    tty->print("reprofile");
    break;
  case MAKE_NOT_ENTRANT:
    tty->print("make-not-entrant");
    break;
  default:
    tty->print("unknown");
  }

  tty->print(" level=%d ", level);

  ResourceMark rm;
  char *method_name = mh->name_and_sig_as_C_string();
  tty->print("[%s", method_name);
  if (inlinee_event) {
    char *inlinee_name = imh->name_and_sig_as_C_string();
    tty->print(" [%s]] ", inlinee_name);
  }
  else tty->print("] ");
  tty->print("@%d queues=%d,%d", bci, CompileBroker::queue_size(CompLevel_full_profile),
                                      CompileBroker::queue_size(CompLevel_full_optimization));

  print_specific(type, mh, imh, bci, level);

  if (type != COMPILE) {
    print_counters("", mh);
    if (inlinee_event) {
      print_counters("inlinee ", imh);
    }
    tty->print(" compilable=");
    bool need_comma = false;
    if (!mh->is_not_compilable(CompLevel_full_profile)) {
      tty->print("c1");
      need_comma = true;
    }
    if (!mh->is_not_osr_compilable(CompLevel_full_profile)) {
      if (need_comma) tty->print(",");
      tty->print("c1-osr");
      need_comma = true;
    }
    if (!mh->is_not_compilable(CompLevel_full_optimization)) {
      if (need_comma) tty->print(",");
      tty->print("c2");
      need_comma = true;
    }
    if (!mh->is_not_osr_compilable(CompLevel_full_optimization)) {
      if (need_comma) tty->print(",");
      tty->print("c2-osr");
    }
    tty->print(" status=");
    if (mh->queued_for_compilation()) {
      tty->print("in-queue");
    } else tty->print("idle");
  }
  tty->print_cr("]");
}