diff src/share/vm/c1/c1_FrameMap.hpp @ 0:a61af66fc99e

Initial load
author duke
date Sat, 01 Dec 2007 00:00:00 +0000
parents
children 61b2245abf36 c18cbe5936b8
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/c1/c1_FrameMap.hpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,266 @@
+/*
+ * Copyright 2000-2006 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 ciMethod;
+class CallingConvention;
+class BasicTypeArray;
+class BasicTypeList;
+
+//--------------------------------------------------------
+//               FrameMap
+//--------------------------------------------------------
+
+//  This class is responsible of mapping items (locals, monitors, spill
+//  slots and registers to their frame location
+//
+//  The monitors are specified by a consecutive index, although each monitor entry
+//  occupies two words. The monitor_index is 0.._num_monitors
+//  The spill index is similar to local index; it is in range 0..(open)
+//
+//  The CPU registers are mapped using a fixed table; register with number 0
+//  is the most used one.
+
+
+//   stack grow direction -->                                        SP
+//  +----------+---+----------+-------+------------------------+-----+
+//  |arguments | x | monitors | spill | reserved argument area | ABI |
+//  +----------+---+----------+-------+------------------------+-----+
+//
+//  x =  ABI area (SPARC) or  return adress and link (i486)
+//  ABI  = ABI area (SPARC) or nothing (i486)
+
+
+class LIR_OprDesc;
+typedef LIR_OprDesc* LIR_Opr;
+
+
+class FrameMap : public CompilationResourceObj {
+ public:
+  enum {
+    nof_cpu_regs = pd_nof_cpu_regs_frame_map,
+    nof_fpu_regs = pd_nof_fpu_regs_frame_map,
+
+    nof_cpu_regs_reg_alloc = pd_nof_cpu_regs_reg_alloc,
+    nof_fpu_regs_reg_alloc = pd_nof_fpu_regs_reg_alloc,
+
+    nof_caller_save_cpu_regs = pd_nof_caller_save_cpu_regs_frame_map,
+    nof_caller_save_fpu_regs = pd_nof_caller_save_fpu_regs_frame_map,
+
+    spill_slot_size_in_bytes = 4
+  };
+
+# include "incls/_c1_FrameMap_pd.hpp.incl"  // platform dependent declarations
+
+  friend class LIR_OprDesc;
+
+ private:
+  static bool         _init_done;
+  static Register     _cpu_rnr2reg [nof_cpu_regs];
+  static int          _cpu_reg2rnr [nof_cpu_regs];
+
+  static LIR_Opr      _caller_save_cpu_regs [nof_caller_save_cpu_regs];
+  static LIR_Opr      _caller_save_fpu_regs [nof_caller_save_fpu_regs];
+
+  int                 _framesize;
+  int                 _argcount;
+  int                 _num_monitors;
+  int                 _num_spills;
+  int                 _reserved_argument_area_size;
+  int                 _oop_map_arg_count;
+
+  CallingConvention*  _incoming_arguments;
+  intArray*           _argument_locations;
+
+  void check_spill_index   (int spill_index)   const { assert(spill_index   >= 0, "bad index"); }
+  void check_monitor_index (int monitor_index) const { assert(monitor_index >= 0 &&
+                                                              monitor_index < _num_monitors, "bad index"); }
+
+  static Register cpu_rnr2reg (int rnr) {
+    assert(_init_done, "tables not initialized");
+    debug_only(cpu_range_check(rnr);)
+    return _cpu_rnr2reg[rnr];
+  }
+
+  static int cpu_reg2rnr (Register reg) {
+    assert(_init_done, "tables not initialized");
+    debug_only(cpu_range_check(reg->encoding());)
+    return _cpu_reg2rnr[reg->encoding()];
+  }
+
+  static void map_register(int rnr, Register reg) {
+    debug_only(cpu_range_check(rnr);)
+    debug_only(cpu_range_check(reg->encoding());)
+    _cpu_rnr2reg[rnr] = reg;
+    _cpu_reg2rnr[reg->encoding()] = rnr;
+  }
+
+  void update_reserved_argument_area_size (int size) {
+    assert(size >= 0, "check");
+    _reserved_argument_area_size = MAX2(_reserved_argument_area_size, size);
+  }
+
+ protected:
+#ifndef PRODUCT
+  static void cpu_range_check (int rnr)          { assert(0 <= rnr && rnr < nof_cpu_regs, "cpu register number is too big"); }
+  static void fpu_range_check (int rnr)          { assert(0 <= rnr && rnr < nof_fpu_regs, "fpu register number is too big"); }
+#endif
+
+
+  ByteSize sp_offset_for_monitor_base(const int idx) const;
+
+  Address make_new_address(ByteSize sp_offset) const;
+
+  ByteSize sp_offset_for_slot(const int idx) const;
+  ByteSize sp_offset_for_double_slot(const int idx) const;
+  ByteSize sp_offset_for_spill(const int idx) const;
+  ByteSize sp_offset_for_monitor_lock(int monitor_index) const;
+  ByteSize sp_offset_for_monitor_object(int monitor_index) const;
+
+  VMReg sp_offset2vmreg(ByteSize offset) const;
+
+  // platform dependent hook used to check that frame is properly
+  // addressable on the platform.  Used by sparc to verify that all
+  // stack addresses are expressable in a simm13.
+  bool validate_frame();
+
+  static LIR_Opr map_to_opr(BasicType type, VMRegPair* reg, bool incoming);
+
+ public:
+  // Opr representing the stack_pointer on this platform
+  static LIR_Opr stack_pointer();
+
+  static BasicTypeArray*     signature_type_array_for(const ciMethod* method);
+  static BasicTypeArray*     signature_type_array_for(const char * signature);
+
+  // for outgoing calls, these also update the reserved area to
+  // include space for arguments and any ABI area.
+  CallingConvention* c_calling_convention (const BasicTypeArray* signature);
+  CallingConvention* java_calling_convention (const BasicTypeArray* signature, bool outgoing);
+
+  // deopt support
+  ByteSize sp_offset_for_orig_pc() { return sp_offset_for_monitor_base(_num_monitors); }
+
+  static LIR_Opr as_opr(Register r) {
+    return LIR_OprFact::single_cpu(cpu_reg2rnr(r));
+  }
+  static LIR_Opr as_oop_opr(Register r) {
+    return LIR_OprFact::single_cpu_oop(cpu_reg2rnr(r));
+  }
+
+  FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size);
+  bool finalize_frame(int nof_slots);
+
+  int   reserved_argument_area_size () const     { return _reserved_argument_area_size; }
+  int   framesize                   () const     { assert(_framesize != -1, "hasn't been calculated"); return _framesize; }
+  ByteSize framesize_in_bytes       () const     { return in_ByteSize(framesize() * 4); }
+  int   num_monitors                () const     { return _num_monitors; }
+  int   num_spills                  () const     { assert(_num_spills >= 0, "not set"); return _num_spills; }
+  int   argcount              () const     { assert(_argcount >= 0, "not set"); return _argcount; }
+
+  int oop_map_arg_count() const { return _oop_map_arg_count; }
+
+  CallingConvention* incoming_arguments() const  { return _incoming_arguments; }
+
+  // convenience routines
+  Address address_for_slot(int index, int sp_adjust = 0) const {
+    return make_new_address(sp_offset_for_slot(index) + in_ByteSize(sp_adjust));
+  }
+  Address address_for_double_slot(int index, int sp_adjust = 0) const {
+    return make_new_address(sp_offset_for_double_slot(index) + in_ByteSize(sp_adjust));
+  }
+  Address address_for_monitor_lock(int monitor_index) const {
+    return make_new_address(sp_offset_for_monitor_lock(monitor_index));
+  }
+  Address address_for_monitor_object(int monitor_index) const {
+    return make_new_address(sp_offset_for_monitor_object(monitor_index));
+  }
+
+  void print_frame_layout() const;
+
+  // Creates Location describing desired slot and returns it via pointer
+  // to Location object. Returns true if the stack frame offset was legal
+  // (as defined by Location::legal_offset_in_bytes()), false otherwise.
+  // Do not use the returned location if this returns false.
+  bool location_for_sp_offset(ByteSize byte_offset_from_sp,
+                              Location::Type loc_type, Location* loc) const;
+
+  bool location_for_monitor_lock  (int monitor_index, Location* loc) const {
+    return location_for_sp_offset(sp_offset_for_monitor_lock(monitor_index), Location::normal, loc);
+  }
+  bool location_for_monitor_object(int monitor_index, Location* loc) const {
+    return location_for_sp_offset(sp_offset_for_monitor_object(monitor_index), Location::oop, loc);
+  }
+  bool locations_for_slot  (int index, Location::Type loc_type,
+                            Location* loc, Location* second = NULL) const;
+
+  VMReg slot_regname(int index) const {
+    return sp_offset2vmreg(sp_offset_for_slot(index));
+  }
+  VMReg monitor_object_regname(int monitor_index) const {
+    return sp_offset2vmreg(sp_offset_for_monitor_object(monitor_index));
+  }
+  VMReg regname(LIR_Opr opr) const;
+
+  static LIR_Opr caller_save_cpu_reg_at(int i) {
+    assert(i >= 0 && i < nof_caller_save_cpu_regs, "out of bounds");
+    return _caller_save_cpu_regs[i];
+  }
+
+  static LIR_Opr caller_save_fpu_reg_at(int i) {
+    assert(i >= 0 && i < nof_caller_save_fpu_regs, "out of bounds");
+    return _caller_save_fpu_regs[i];
+  }
+
+  static void init();
+};
+
+//               CallingConvention
+//--------------------------------------------------------
+
+class CallingConvention: public ResourceObj {
+ private:
+  LIR_OprList* _args;
+  int          _reserved_stack_slots;
+
+ public:
+  CallingConvention (LIR_OprList* args, int reserved_stack_slots)
+    : _args(args)
+    , _reserved_stack_slots(reserved_stack_slots)  {}
+
+  LIR_OprList* args()       { return _args; }
+
+  LIR_Opr at(int i) const   { return _args->at(i); }
+  int length() const        { return _args->length(); }
+
+  // Indicates number of real frame slots used by arguments passed on stack.
+  int reserved_stack_slots() const            { return _reserved_stack_slots; }
+
+#ifndef PRODUCT
+  void print () const {
+    for (int i = 0; i < length(); i++) {
+      at(i)->print();
+    }
+  }
+#endif // PRODUCT
+};