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hotspot/src/share/vm/ci/ciMethodData.hpp

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+/*
+ * Copyright 2001-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+class ciBitData;
+class ciCounterData;
+class ciJumpData;
+class ciReceiverTypeData;
+class ciRetData;
+class ciBranchData;
+class ciArrayData;
+class ciMultiBranchData;
+
+typedef ProfileData ciProfileData;
+
+class ciBitData : public BitData {
+public:
+  ciBitData(DataLayout* layout) : BitData(layout) {};
+};
+
+class ciCounterData : public CounterData {
+public:
+  ciCounterData(DataLayout* layout) : CounterData(layout) {};
+};
+
+class ciJumpData : public JumpData {
+public:
+  ciJumpData(DataLayout* layout) : JumpData(layout) {};
+};
+
+class ciReceiverTypeData : public ReceiverTypeData {
+public:
+  ciReceiverTypeData(DataLayout* layout) : ReceiverTypeData(layout) {};
+
+  void set_receiver(uint row, ciKlass* recv) {
+    assert((uint)row < row_limit(), "oob");
+    set_intptr_at(receiver0_offset + row * receiver_type_row_cell_count,
+                  (intptr_t) recv);
+  }
+
+  ciKlass* receiver(uint row) {
+    assert((uint)row < row_limit(), "oob");
+    ciObject* recv = (ciObject*)intptr_at(receiver0_offset + row * receiver_type_row_cell_count);
+    assert(recv == NULL || recv->is_klass(), "wrong type");
+    return (ciKlass*)recv;
+  }
+
+  // Copy & translate from oop based ReceiverTypeData
+  virtual void translate_from(ProfileData* data) {
+    translate_receiver_data_from(data);
+  }
+  void translate_receiver_data_from(ProfileData* data);
+#ifndef PRODUCT
+  void print_data_on(outputStream* st);
+  void print_receiver_data_on(outputStream* st);
+#endif
+};
+
+class ciVirtualCallData : public VirtualCallData {
+  // Fake multiple inheritance...  It's a ciReceiverTypeData also.
+  ciReceiverTypeData* rtd_super() { return (ciReceiverTypeData*) this; }
+
+public:
+  ciVirtualCallData(DataLayout* layout) : VirtualCallData(layout) {};
+
+  void set_receiver(uint row, ciKlass* recv) {
+    rtd_super()->set_receiver(row, recv);
+  }
+
+  ciKlass* receiver(uint row) {
+    return rtd_super()->receiver(row);
+  }
+
+  // Copy & translate from oop based VirtualCallData
+  virtual void translate_from(ProfileData* data) {
+    rtd_super()->translate_receiver_data_from(data);
+  }
+#ifndef PRODUCT
+  void print_data_on(outputStream* st);
+#endif
+};
+
+
+class ciRetData : public RetData {
+public:
+  ciRetData(DataLayout* layout) : RetData(layout) {};
+};
+
+class ciBranchData : public BranchData {
+public:
+  ciBranchData(DataLayout* layout) : BranchData(layout) {};
+};
+
+class ciArrayData : public ArrayData {
+public:
+  ciArrayData(DataLayout* layout) : ArrayData(layout) {};
+};
+
+class ciMultiBranchData : public MultiBranchData {
+public:
+  ciMultiBranchData(DataLayout* layout) : MultiBranchData(layout) {};
+};
+
+// ciMethodData
+//
+// This class represents a methodDataOop in the HotSpot virtual
+// machine.
+
+class ciMethodData : public ciObject {
+  CI_PACKAGE_ACCESS
+
+private:
+  // Size in bytes
+  int _data_size;
+  int _extra_data_size;
+
+  // Data entries
+  intptr_t* _data;
+
+  // Cached hint for data_before()
+  int _hint_di;
+
+  // Is data attached?  And is it mature?
+  enum { empty_state, immature_state, mature_state };
+  u_char _state;
+
+  // Set this true if empty extra_data slots are ever witnessed.
+  u_char _saw_free_extra_data;
+
+  // Support for interprocedural escape analysis
+  intx              _eflags;          // flags on escape information
+  intx              _arg_local;       // bit set of non-escaping arguments
+  intx              _arg_stack;       // bit set of stack-allocatable arguments
+  intx              _arg_returned;    // bit set of returned arguments
+
+  // Maturity of the oop when the snapshot is taken.
+  int _current_mileage;
+
+  // Coherent snapshot of original header.
+  methodDataOopDesc _orig;
+
+  ciMethodData(methodDataHandle h_md);
+  ciMethodData();
+
+  // Accessors
+  int data_size() { return _data_size; }
+  int extra_data_size() { return _extra_data_size; }
+  intptr_t * data() { return _data; }
+
+  methodDataOop get_methodDataOop() const {
+    if (handle() == NULL) return NULL;
+    methodDataOop mdo = (methodDataOop)get_oop();
+    assert(mdo != NULL, "illegal use of unloaded method data");
+    return mdo;
+  }
+
+  const char* type_string()                      { return "ciMethodData"; }
+
+  void print_impl(outputStream* st);
+
+  DataLayout* data_layout_at(int data_index) {
+    assert(data_index % sizeof(intptr_t) == 0, "unaligned");
+    return (DataLayout*) (((address)_data) + data_index);
+  }
+
+  bool out_of_bounds(int data_index) {
+    return data_index >= data_size();
+  }
+
+  // hint accessors
+  int      hint_di() const  { return _hint_di; }
+  void set_hint_di(int di)  {
+    assert(!out_of_bounds(di), "hint_di out of bounds");
+    _hint_di = di;
+  }
+  ciProfileData* data_before(int bci) {
+    // avoid SEGV on this edge case
+    if (data_size() == 0)
+      return NULL;
+    int hint = hint_di();
+    if (data_layout_at(hint)->bci() <= bci)
+      return data_at(hint);
+    return first_data();
+  }
+
+
+  // What is the index of the first data entry?
+  int first_di() { return 0; }
+
+public:
+  bool is_method_data()  { return true; }
+  bool is_empty() { return _state == empty_state; }
+  bool is_mature() { return _state == mature_state; }
+
+  int creation_mileage() { return _orig.creation_mileage(); }
+  int current_mileage()  { return _current_mileage; }
+
+  void load_data();
+
+  // Convert a dp (data pointer) to a di (data index).
+  int dp_to_di(address dp) {
+    return dp - ((address)_data);
+  }
+
+  // Get the data at an arbitrary (sort of) data index.
+  ciProfileData* data_at(int data_index);
+
+  // Walk through the data in order.
+  ciProfileData* first_data() { return data_at(first_di()); }
+  ciProfileData* next_data(ciProfileData* current);
+  bool is_valid(ciProfileData* current) { return current != NULL; }
+
+  // Get the data at an arbitrary bci, or NULL if there is none.
+  ciProfileData* bci_to_data(int bci);
+  ciProfileData* bci_to_extra_data(int bci, bool create_if_missing);
+
+  uint overflow_trap_count() const {
+    return _orig.overflow_trap_count();
+  }
+  uint overflow_recompile_count() const {
+    return _orig.overflow_recompile_count();
+  }
+  uint decompile_count() const {
+    return _orig.decompile_count();
+  }
+  uint trap_count(int reason) const {
+    return _orig.trap_count(reason);
+  }
+  uint trap_reason_limit() const { return _orig.trap_reason_limit(); }
+  uint trap_count_limit()  const { return _orig.trap_count_limit(); }
+
+  // Helpful query functions that decode trap_state.
+  int has_trap_at(ciProfileData* data, int reason);
+  int has_trap_at(int bci, int reason) {
+    return has_trap_at(bci_to_data(bci), reason);
+  }
+  int trap_recompiled_at(ciProfileData* data);
+  int trap_recompiled_at(int bci) {
+    return trap_recompiled_at(bci_to_data(bci));
+  }
+
+  void clear_escape_info();
+  bool has_escape_info();
+  void update_escape_info();
+
+  void set_eflag(methodDataOopDesc::EscapeFlag f);
+  void clear_eflag(methodDataOopDesc::EscapeFlag f);
+  bool eflag_set(methodDataOopDesc::EscapeFlag f) const;
+
+  void set_arg_local(int i);
+  void set_arg_stack(int i);
+  void set_arg_returned(int i);
+
+  bool is_arg_local(int i) const;
+  bool is_arg_stack(int i) const;
+  bool is_arg_returned(int i) const;
+
+  // Code generation helper
+  ByteSize offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data);
+  int      byte_offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data) { return in_bytes(offset_of_slot(data, slot_offset_in_data)); }
+
+#ifndef PRODUCT
+  // printing support for method data
+  void print();
+  void print_data_on(outputStream* st);
+#endif
+};