C++ (Cpp) scan_method Examples

Example #1

File: rewriter.cpp Project: AllenWeb/jdk7u-hotspot

// Unrewrite the bytecodes if an error occurs.
void Rewriter::restore_bytecodes() {
  int len = _methods->length();

  for (int i = len-1; i >= 0; i--) {
    methodOop method = (methodOop)_methods->obj_at(i);
    scan_method(method, true);
  }
}

Example #2

File: rewriter.cpp Project: tetratec/Runescape-Launcher

Rewriter::Rewriter(instanceKlassHandle klass, constantPoolHandle cpool, objArrayHandle methods, TRAPS)
  : _klass(klass),
    _pool(cpool),
    _methods(methods)
{
  assert(_pool->cache() == NULL, "constant pool cache must not be set yet");

  // determine index maps for methodOop rewriting
  compute_index_maps();

  if (RegisterFinalizersAtInit && _klass->name() == vmSymbols::java_lang_Object()) {
    bool did_rewrite = false;
    int i = _methods->length();
    while (i-- > 0) {
      methodOop method = (methodOop)_methods->obj_at(i);
      if (method->intrinsic_id() == vmIntrinsics::_Object_init) {
        // rewrite the return bytecodes of Object.<init> to register the
        // object for finalization if needed.
        methodHandle m(THREAD, method);
        rewrite_Object_init(m, CHECK);
        did_rewrite = true;
        break;
      }
    }
    assert(did_rewrite, "must find Object::<init> to rewrite it");
  }

  // rewrite methods, in two passes
  int i, len = _methods->length();

  for (i = len; --i >= 0; ) {
    methodOop method = (methodOop)_methods->obj_at(i);
    scan_method(method);
  }

  // allocate constant pool cache, now that we've seen all the bytecodes
  make_constant_pool_cache(CHECK);

  for (i = len; --i >= 0; ) {
    methodHandle m(THREAD, (methodOop)_methods->obj_at(i));

    if (m->has_jsrs()) {
      m = rewrite_jsrs(m, CHECK);
      // Method might have gotten rewritten.
      _methods->obj_at_put(i, m());
    }

    // Set up method entry points for compiler and interpreter.
    m->link_method(m, CHECK);
  }
}

Example #3

File: rewriter.cpp Project: AllenWeb/jdk7u-hotspot

Rewriter::Rewriter(instanceKlassHandle klass, constantPoolHandle cpool, objArrayHandle methods, TRAPS)
  : _klass(klass),
    _pool(cpool),
    _methods(methods)
{
  assert(_pool->cache() == NULL, "constant pool cache must not be set yet");

  // determine index maps for methodOop rewriting
  compute_index_maps();

  if (RegisterFinalizersAtInit && _klass->name() == vmSymbols::java_lang_Object()) {
    bool did_rewrite = false;
    int i = _methods->length();
    while (i-- > 0) {
      methodOop method = (methodOop)_methods->obj_at(i);
      if (method->intrinsic_id() == vmIntrinsics::_Object_init) {
        // rewrite the return bytecodes of Object.<init> to register the
        // object for finalization if needed.
        methodHandle m(THREAD, method);
        rewrite_Object_init(m, CHECK);
        did_rewrite = true;
        break;
      }
    }
    assert(did_rewrite, "must find Object::<init> to rewrite it");
  }

  // rewrite methods, in two passes
  int len = _methods->length();

  for (int i = len-1; i >= 0; i--) {
    methodOop method = (methodOop)_methods->obj_at(i);
    scan_method(method);
  }

  // allocate constant pool cache, now that we've seen all the bytecodes
  make_constant_pool_cache(THREAD);

  // Restore bytecodes to their unrewritten state if there are exceptions
  // rewriting bytecodes or allocating the cpCache
  if (HAS_PENDING_EXCEPTION) {
    restore_bytecodes();
    return;
  }
}