methodKlass.cpp

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/* Copyright 1994, 1995 LongView Technologies L.L.C. $Revision: 1.71 $ */
/* Copyright (c) 2006, Sun Microsystems, Inc.
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# include "incls/_precompiled.incl"
# include "incls/_methodKlass.cpp.incl"

void set_methodKlass_vtbl(Klass *k) {
  methodKlass o;
  k->set_vtbl_value(o.vtbl_value());
}

klassOop methodKlass::create_subclass(mixinOop mixin, Format format) {
  return NULL;
}

void methodKlass::oop_layout_iterate(oop obj, ObjectLayoutClosure* blk) {
  // header
  memOop(obj)->layout_iterate_header(blk);
  methodOop m = methodOop(obj);
  blk->do_oop("debugInfo", (oop*) &m->addr()->_debugInfo);
  blk->do_oop("selector",  (oop*) &m->addr()->_selector_or_method);
  blk->do_oop("sizeCodes", (oop*) &m->addr()->_size_and_flags);
  // indexables
  lprintf("methodKlass::oop_layout_iterate not implemented yet\n");
  CodeIterator c(m);
  do {
    // Put in the meat here.
  } while (c.advance());
}

void methodKlass::oop_oop_iterate(oop obj, OopClosure* blk) {
  // header
  memOop(obj)->oop_iterate_header(blk);
  methodOop m = methodOop(obj);
  blk->do_oop((oop*) &m->addr()->_debugInfo);
  blk->do_oop((oop*) &m->addr()->_selector_or_method);
  blk->do_oop((oop*) &m->addr()->_size_and_flags);
  // codes
  CodeIterator c(m);
  do {
    switch(c.format()) {
     case Bytecodes::BBO  : blk->do_oop(c.aligned_oop(2));   break; // BBO
     case Bytecodes::BBOO : blk->do_oop(c.aligned_oop(2));
     case Bytecodes::BBLO : blk->do_oop(c.aligned_oop(2)+1); break; // BBOO, BBLO
     case Bytecodes::BOL  :
     case Bytecodes::BO   : blk->do_oop(c.aligned_oop(1));   break; // BOL, BO
     case Bytecodes::BOO  :
     case Bytecodes::BOOLB: blk->do_oop(c.aligned_oop(1));
     case Bytecodes::BLO  : blk->do_oop(c.aligned_oop(1)+1); break; // BOO, BOOLB, BLO
    }
  } while (c.advance());
}

void methodKlass::oop_print_layout(oop obj) {
  methodOop(obj)->print_codes();
}

void methodKlass::oop_print_on(oop obj, outputStream* st) {
  assert(obj->is_method(), "must be method");
  methodOop method = methodOop(obj);

  int indent_col =  3;
  int value_col  = 16;

  // header
  memOopKlass::oop_print_value_on(obj, st);
  st->cr();

  // selector/outer method
  st->fill_to(indent_col);
  st->print("%s:", method->is_blockMethod() ? "outer" : "selector");
  st->fill_to(value_col);
  method->selector_or_method()->print_value_on(st);
  st->cr();

  // holder
  klassOop k = Universe::method_holder_of(method->home());
  if (k) {
    st->fill_to(indent_col);
    st->print("holder:");
    st->fill_to(value_col);
    k->print_value_on(st);
    st->cr();
  }

  // incovation counter
  st->fill_to(indent_col);
  st->print("invocation:");
  st->fill_to(value_col);
  st->print_cr("%d", method->invocation_count());

  // sharing counter
  st->fill_to(indent_col);
  st->print("sharing:");
  st->fill_to(value_col);
  st->print_cr("%d", method->sharing_count());

  // code size
  st->fill_to(indent_col);
  st->print("code size:");
  st->fill_to(value_col);
  st->print_cr("%d", method->size_of_codes());

  // arguments
  st->fill_to(indent_col);
  st->print("arguments:");
  st->fill_to(value_col);
  st->print_cr("%d", method->nofArgs());

  // debug array
  st->fill_to(indent_col);
  st->print("debug info:");
  st->fill_to(value_col);
  method->debugInfo()->print_value_on(st);
  st->cr();

  // flags
  st->fill_to(indent_col);
  st->print("flags:");
  st->fill_to(value_col);
  st->print("%s", method->is_customized() ? "customized" : "not_customized");
  if (method->allocatesInterpretedContext()) {
    st->print(" allocates_context"); 
  }
  if (method->mustBeCustomizedToClass()) {
    st->print(" class_specific"); 
  }
  if (method->containsNLR()) {
    st->print(" NLR"); 
  }

  // flags for blocks
  if (method->is_blockMethod()) {
    switch(method->block_info()) {
      case methodOopDesc::expects_nil:       st->print(" pure_block");              break;
      case methodOopDesc::expects_self:      st->print(" self_copying_block");      break;
      case methodOopDesc::expects_parameter: st->print(" parameter_copying_block"); break;
      case methodOopDesc::expects_context:   st->print(" full_block");              break;
    }
  } else { 
    switch(method->method_inlining_info()) {
      case methodOopDesc::normal_inline:     st->print(" normal inline");           break;
      case methodOopDesc::never_inline:      st->print(" never inline");            break;
      case methodOopDesc::always_inline:     st->print(" aways inline");            break;
    }
  }
  st->cr();
}

void methodKlass::oop_print_value_on(oop obj, outputStream* st) {
  assert(obj->is_method(), "must be method");
  methodOop method = methodOop(obj);
  if (PrintObjectID) {
    memOop(obj)->print_id_on(st);
    st->print("-");
  }
  if (method->is_blockMethod()) {
    st->print("BlockMethod in ");
    method->enclosing_method_selector()->print_symbol_on(st);
  } else {
    st->print("Method ");
    method->selector()->print_symbol_on(st);
  }
  if (ProfilerShowMethodHolder) {
    klassOop k = Universe::method_holder_of(method);
    st->print(" in ");
    if (k) {
      k->print_value_on(st);
    } else {
      st->print("(unknown)");
    }
  }
}

int methodKlass::oop_scavenge_contents(oop obj) {
  // Methods must reside in old space
  ShouldNotCallThis();
  return -1;  
}

int methodKlass::oop_scavenge_tenured_contents(oop obj) {
  // There should be no new objects referred insinde a methodOop
  return object_size(methodOop(obj)->size_of_codes());  
}

void methodKlass::oop_follow_contents(oop obj) {
  methodOop m = methodOop(obj);
  CodeIterator c(m);
  do {
    switch(c.format()) {
     case Bytecodes::BBO  : MarkSweep::reverse_and_push(c.aligned_oop(2));   break; // BBO
     case Bytecodes::BBOO : MarkSweep::reverse_and_push(c.aligned_oop(2));
     case Bytecodes::BBLO : MarkSweep::reverse_and_push(c.aligned_oop(2)+1); break; // BBOO, BBLO
     case Bytecodes::BOL  :
     case Bytecodes::BO   : MarkSweep::reverse_and_push(c.aligned_oop(1));   break; // BOL, BO
     case Bytecodes::BOO  :
     case Bytecodes::BOOLB: MarkSweep::reverse_and_push(c.aligned_oop(1));
     case Bytecodes::BLO  : MarkSweep::reverse_and_push(c.aligned_oop(1)+1); break; // BOO, BOOLB, BLO
    }
  } while (c.advance());
  MarkSweep::reverse_and_push((oop*) &m->addr()->_debugInfo);
  MarkSweep::reverse_and_push((oop*) &m->addr()->_selector_or_method);
  m->follow_header();
}

static oop tenured(oop obj) {
  return obj->is_old() ? obj : obj->shallow_copy(true);
}

methodOop methodKlass::constructMethod(oop selector_or_method, int flags, int nofArgs, 
                                       objArrayOop debugInfo, byteArrayOop bytes, objArrayOop oops) {
  klassOop k        = as_klassOop();
  int      obj_size = methodOopDesc::header_size() + oops->length();

  assert(oops->length() * oopSize == bytes->length(), "Invalid array sizes");

  // allocate
  methodOop method = as_methodOop(Universe::allocate_tenured(obj_size));
  memOop(method)->initialize_header(has_untagged_contents(), k);

  // initialize the header
  method->set_debugInfo(objArrayOop(tenured(debugInfo)));
  method->set_selector_or_method(tenured(selector_or_method));

  method->set_invocation_count(0);
  method->set_sharing_count(0);
  method->set_size_and_flags(oops->length(), nofArgs, flags);

  // merge the bytes and the oops

  // first copy the byte array into the method
  for (int index = 1; index <= bytes->length(); index++) {
    method->byte_at_put(index, bytes->byte_at(index));
  }

  // then merge in the oops
  for (index = 1; index <= oops->length(); index++) {
    bool copyOop = true;
    int bc_index = index*oopSize-(oopSize-1);
    for (int i = 0; i < oopSize; i++) {
      // copy oop if bytearray holds 4 consecutive aligned zeroes
      if (bytes->byte_at(bc_index+i) != 0) {
        copyOop = false;
      }
    }
    if (copyOop) {
      oop value = tenured(oops->obj_at(index));
      assert(value->is_smi() || value->is_old(), "literal must be tenured");
      method->oop_at_put(bc_index, value);
    }
  }

  assert(method->is_method(), "must be method");
  return method;
}

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