jdk8-mips64-public/hotspot: src/share/vm/runtime/frame.hpp@126ea7725993 (annotated)

src/share/vm/runtime/frame.hpp@126ea7725993 (annotated)

src/share/vm/runtime/frame.hpp

Tue, 03 Aug 2010 08:13:38 -0400

author: bobv
date: Tue, 03 Aug 2010 08:13:38 -0400
changeset 2036: 126ea7725993
parent 1907: c18cbe5936b8
child 2082: da877bdc9000
permissions: -rw-r--r--

6953477: Increase portability and flexibility of building Hotspot
Summary: A collection of portability improvements including shared code support for PPC, ARM platforms, software floating point, cross compilation support and improvements in error crash detail.
Reviewed-by: phh, never, coleenp, dholmes

 /*
  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 typedef class BytecodeInterpreter* interpreterState;
 class CodeBlob;
 class vframeArray;
 // A frame represents a physical stack frame (an activation).  Frames
 // can be C or Java frames, and the Java frames can be interpreted or
 // compiled.  In contrast, vframes represent source-level activations,
 // so that one physical frame can correspond to multiple source level
 // frames because of inlining.
 class frame VALUE_OBJ_CLASS_SPEC {
  private:
   // Instance variables:
   intptr_t* _sp; // stack pointer (from Thread::last_Java_sp)
   address   _pc; // program counter (the next instruction after the call)
   CodeBlob* _cb; // CodeBlob that "owns" pc
   enum deopt_state {
     not_deoptimized,
     is_deoptimized,
     unknown
   };
   deopt_state _deopt_state;
  public:
   // Constructors
   frame();
   // Accessors
   // pc: Returns the pc at which this frame will continue normally.
   // It must point at the beginning of the next instruction to execute.
   address pc() const             { return _pc; }
   // This returns the pc that if you were in the debugger you'd see. Not
   // the idealized value in the frame object. This undoes the magic conversion
   // that happens for deoptimized frames. In addition it makes the value the
   // hardware would want to see in the native frame. The only user (at this point)
   // is deoptimization. It likely no one else should ever use it.
   address raw_pc() const;
   void set_pc( address   newpc );
   intptr_t* sp() const           { return _sp; }
   void set_sp( intptr_t* newsp ) { _sp = newsp; }
   CodeBlob* cb() const           { return _cb; }
   // patching operations
   void   patch_pc(Thread* thread, address pc);
   // Every frame needs to return a unique id which distinguishes it from all other frames.
   // For sparc and ia32 use sp. ia64 can have memory frames that are empty so multiple frames
   // will have identical sp values. For ia64 the bsp (fp) value will serve. No real frame
   // should have an id() of NULL so it is a distinguishing value for an unmatchable frame.
   // We also have relationals which allow comparing a frame to anoth frame's id() allow
   // us to distinguish younger (more recent activation) from older (less recent activations)
   // A NULL id is only valid when comparing for equality.
   intptr_t* id(void) const;
   bool is_younger(intptr_t* id) const;
   bool is_older(intptr_t* id) const;
   // testers
   // Compares for strict equality. Rarely used or needed.
   // It can return a different result than f1.id() == f2.id()
   bool equal(frame other) const;
   // type testers
   bool is_interpreted_frame()    const;
   bool is_java_frame()           const;
   bool is_entry_frame()          const;             // Java frame called from C?
   bool is_native_frame()         const;
   bool is_runtime_frame()        const;
   bool is_compiled_frame()       const;
   bool is_safepoint_blob_frame() const;
   bool is_deoptimized_frame()    const;
   // testers
   bool is_first_frame() const; // oldest frame? (has no sender)
   bool is_first_java_frame() const;              // same for Java frame
   bool is_interpreted_frame_valid(JavaThread* thread) const;       // performs sanity checks on interpreted frames.
   // tells whether this frame is marked for deoptimization
   bool should_be_deoptimized() const;
   // tells whether this frame can be deoptimized
   bool can_be_deoptimized() const;
   // returns the frame size in stack slots
   int frame_size(RegisterMap* map) const;
   // returns the sending frame
   frame sender(RegisterMap* map) const;
   // for Profiling - acting on another frame. walks sender frames
   // if valid.
   frame profile_find_Java_sender_frame(JavaThread *thread);
   bool safe_for_sender(JavaThread *thread);
   // returns the sender, but skips conversion frames
   frame real_sender(RegisterMap* map) const;
   // returns the the sending Java frame, skipping any intermediate C frames
   // NB: receiver must not be first frame
   frame java_sender() const;
  private:
   // Helper methods for better factored code in frame::sender
   frame sender_for_compiled_frame(RegisterMap* map) const;
   frame sender_for_entry_frame(RegisterMap* map) const;
   frame sender_for_interpreter_frame(RegisterMap* map) const;
   frame sender_for_native_frame(RegisterMap* map) const;
   // All frames:
   // A low-level interface for vframes:
  public:
   intptr_t* addr_at(int index) const             { return &fp()[index];    }
   intptr_t  at(int index) const                  { return *addr_at(index); }
   // accessors for locals
   oop obj_at(int offset) const                   { return *obj_at_addr(offset);  }
   void obj_at_put(int offset, oop value)         { *obj_at_addr(offset) = value; }
   jint int_at(int offset) const                  { return *int_at_addr(offset);  }
   void int_at_put(int offset, jint value)        { *int_at_addr(offset) = value; }
   oop*      obj_at_addr(int offset) const        { return (oop*)     addr_at(offset); }
   oop*      adjusted_obj_at_addr(methodOop method, int index) { return obj_at_addr(adjust_offset(method, index)); }
  private:
   jint*    int_at_addr(int offset) const         { return (jint*)    addr_at(offset); }
  public:
   // Link (i.e., the pointer to the previous frame)
   intptr_t* link() const;
   void set_link(intptr_t* addr);
   // Return address
   address  sender_pc() const;
   // Support for deoptimization
   void deoptimize(JavaThread* thread, bool thread_is_known_safe = false);
   // The frame's original SP, before any extension by an interpreted callee;
   // used for packing debug info into vframeArray objects and vframeArray lookup.
   intptr_t* unextended_sp() const;
   // returns the stack pointer of the calling frame
   intptr_t* sender_sp() const;
   // Interpreter frames:
  private:
   intptr_t** interpreter_frame_locals_addr() const;
   intptr_t*  interpreter_frame_bcx_addr() const;
   intptr_t*  interpreter_frame_mdx_addr() const;
  public:
   // Locals
   // The _at version returns a pointer because the address is used for GC.
   intptr_t* interpreter_frame_local_at(int index) const;
   void interpreter_frame_set_locals(intptr_t* locs);
   // byte code index/pointer (use these functions for unchecked frame access only!)
   intptr_t interpreter_frame_bcx() const                  { return *interpreter_frame_bcx_addr(); }
   void interpreter_frame_set_bcx(intptr_t bcx);
   // byte code index
   jint interpreter_frame_bci() const;
   void interpreter_frame_set_bci(jint bci);
   // byte code pointer
   address interpreter_frame_bcp() const;
   void    interpreter_frame_set_bcp(address bcp);
   // Unchecked access to the method data index/pointer.
   // Only use this if you know what you are doing.
   intptr_t interpreter_frame_mdx() const                  { return *interpreter_frame_mdx_addr(); }
   void interpreter_frame_set_mdx(intptr_t mdx);
   // method data pointer
   address interpreter_frame_mdp() const;
   void    interpreter_frame_set_mdp(address dp);
   // Find receiver out of caller's (compiled) argument list
   oop retrieve_receiver(RegisterMap *reg_map);
   // Return the monitor owner and BasicLock for compiled synchronized
   // native methods so that biased locking can revoke the receiver's
   // bias if necessary. Takes optional nmethod for this frame as
   // argument to avoid performing repeated lookups in code cache.
   BasicLock* compiled_synchronized_native_monitor      (nmethod* nm = NULL);
   oop        compiled_synchronized_native_monitor_owner(nmethod* nm = NULL);
   // Find receiver for an invoke when arguments are just pushed on stack (i.e., callee stack-frame is
   // not setup)
   oop interpreter_callee_receiver(symbolHandle signature)     { return *interpreter_callee_receiver_addr(signature); }
   oop* interpreter_callee_receiver_addr(symbolHandle signature);
   // expression stack (may go up or down, direction == 1 or -1)
  public:
   intptr_t* interpreter_frame_expression_stack() const;
   static  jint  interpreter_frame_expression_stack_direction();
   // The _at version returns a pointer because the address is used for GC.
   intptr_t* interpreter_frame_expression_stack_at(jint offset) const;
   // top of expression stack
   intptr_t* interpreter_frame_tos_at(jint offset) const;
   intptr_t* interpreter_frame_tos_address() const;
   jint  interpreter_frame_expression_stack_size() const;
   intptr_t* interpreter_frame_sender_sp() const;
 #ifndef CC_INTERP
   // template based interpreter deoptimization support
   void  set_interpreter_frame_sender_sp(intptr_t* sender_sp);
   void interpreter_frame_set_monitor_end(BasicObjectLock* value);
 #endif // CC_INTERP
   // BasicObjectLocks:
   //
   // interpreter_frame_monitor_begin is higher in memory than interpreter_frame_monitor_end
   // Interpreter_frame_monitor_begin points to one element beyond the oldest one,
   // interpreter_frame_monitor_end   points to the youngest one, or if there are none,
   //                                 it points to one beyond where the first element will be.
   // interpreter_frame_monitor_size  reports the allocation size of a monitor in the interpreter stack.
   //                                 this value is >= BasicObjectLock::size(), and may be rounded up
   BasicObjectLock* interpreter_frame_monitor_begin() const;
   BasicObjectLock* interpreter_frame_monitor_end()   const;
   BasicObjectLock* next_monitor_in_interpreter_frame(BasicObjectLock* current) const;
   BasicObjectLock* previous_monitor_in_interpreter_frame(BasicObjectLock* current) const;
   static int interpreter_frame_monitor_size();
   void interpreter_frame_verify_monitor(BasicObjectLock* value) const;
   // Tells whether the current interpreter_frame frame pointer
   // corresponds to the old compiled/deoptimized fp
   // The receiver used to be a top level frame
   bool interpreter_frame_equals_unpacked_fp(intptr_t* fp);
   // Return/result value from this interpreter frame
   // If the method return type is T_OBJECT or T_ARRAY populates oop_result
   // For other (non-T_VOID) the appropriate field in the jvalue is populated
   // with the result value.
   // Should only be called when at method exit when the method is not
   // exiting due to an exception.
   BasicType interpreter_frame_result(oop* oop_result, jvalue* value_result);
  public:
   // Method & constant pool cache
   methodOop interpreter_frame_method() const;
   void interpreter_frame_set_method(methodOop method);
   methodOop* interpreter_frame_method_addr() const;
   constantPoolCacheOop* interpreter_frame_cache_addr() const;
 #ifdef PPC
   oop* interpreter_frame_mirror_addr() const;
 #endif
  public:
   // Entry frames
   JavaCallWrapper* entry_frame_call_wrapper() const;
   intptr_t* entry_frame_argument_at(int offset) const;
   // tells whether there is another chunk of Delta stack above
   bool entry_frame_is_first() const;
   // Compiled frames:
  public:
   // Given the index of a local, and the number of argument words
   // in this stack frame, tell which word of the stack frame to find
   // the local in.  Arguments are stored above the ofp/rpc pair,
   // while other locals are stored below it.
   // Since monitors (BasicLock blocks) are also assigned indexes,
   // but may have different storage requirements, their presence
   // can also affect the calculation of offsets.
   static int local_offset_for_compiler(int local_index, int nof_args, int max_nof_locals, int max_nof_monitors);
   // Given the index of a monitor, etc., tell which word of the
   // stack frame contains the start of the BasicLock block.
   // Note that the local index by convention is the __higher__
   // of the two indexes allocated to the block.
   static int monitor_offset_for_compiler(int local_index, int nof_args, int max_nof_locals, int max_nof_monitors);
   // Tell the smallest value that local_offset_for_compiler will attain.
   // This is used to help determine how much stack frame to allocate.
   static int min_local_offset_for_compiler(int nof_args, int max_nof_locals, int max_nof_monitors);
   // Tells if this register must be spilled during a call.
   // On Intel, all registers are smashed by calls.
   static bool volatile_across_calls(Register reg);
   // Safepoints
  public:
   oop saved_oop_result(RegisterMap* map) const;
   void set_saved_oop_result(RegisterMap* map, oop obj);
   // For debugging
  private:
   const char* print_name() const;
  public:
   void print_value() const { print_value_on(tty,NULL); }
   void print_value_on(outputStream* st, JavaThread *thread) const;
   void print_on(outputStream* st) const;
   void interpreter_frame_print_on(outputStream* st) const;
   void print_on_error(outputStream* st, char* buf, int buflen, bool verbose = false) const;
   // Conversion from an VMReg to physical stack location
   oop* oopmapreg_to_location(VMReg reg, const RegisterMap* regmap) const;
   // Oops-do's
   void oops_compiled_arguments_do(symbolHandle signature, bool has_receiver, const RegisterMap* reg_map, OopClosure* f);
   void oops_interpreted_do(OopClosure* f, const RegisterMap* map, bool query_oop_map_cache = true);
  private:
   void oops_interpreted_arguments_do(symbolHandle signature, bool has_receiver, OopClosure* f);
   // Iteration of oops
   void oops_do_internal(OopClosure* f, CodeBlobClosure* cf, RegisterMap* map, bool use_interpreter_oop_map_cache);
   void oops_entry_do(OopClosure* f, const RegisterMap* map);
   void oops_code_blob_do(OopClosure* f, CodeBlobClosure* cf, const RegisterMap* map);
   int adjust_offset(methodOop method, int index); // helper for above fn
  public:
   // Memory management
   void oops_do(OopClosure* f, CodeBlobClosure* cf, RegisterMap* map) { oops_do_internal(f, cf, map, true); }
   void nmethods_do(CodeBlobClosure* cf);
   void gc_prologue();
   void gc_epilogue();
   void pd_gc_epilog();
 # ifdef ENABLE_ZAP_DEAD_LOCALS
  private:
   class CheckValueClosure: public OopClosure {
    public:
     void do_oop(oop* p);
     void do_oop(narrowOop* p) { ShouldNotReachHere(); }
   };
   static CheckValueClosure _check_value;
   class CheckOopClosure: public OopClosure {
    public:
     void do_oop(oop* p);
     void do_oop(narrowOop* p) { ShouldNotReachHere(); }
   };
   static CheckOopClosure _check_oop;
   static void check_derived_oop(oop* base, oop* derived);
   class ZapDeadClosure: public OopClosure {
    public:
     void do_oop(oop* p);
     void do_oop(narrowOop* p) { ShouldNotReachHere(); }
   };
   static ZapDeadClosure _zap_dead;
  public:
   // Zapping
   void zap_dead_locals            (JavaThread* thread, const RegisterMap* map);
   void zap_dead_interpreted_locals(JavaThread* thread, const RegisterMap* map);
   void zap_dead_compiled_locals   (JavaThread* thread, const RegisterMap* map);
   void zap_dead_entry_locals      (JavaThread* thread, const RegisterMap* map);
   void zap_dead_deoptimized_locals(JavaThread* thread, const RegisterMap* map);
 # endif
   // Verification
   void verify(const RegisterMap* map);
   static bool verify_return_pc(address x);
   static bool is_bci(intptr_t bcx);
   // Usage:
   // assert(frame::verify_return_pc(return_address), "must be a return pc");
   int pd_oop_map_offset_adjustment() const;
 # include "incls/_frame_pd.hpp.incl"
 };
 //
 // StackFrameStream iterates through the frames of a thread starting from
 // top most frame. It automatically takes care of updating the location of
 // all (callee-saved) registers. Notice: If a thread is stopped at
 // a safepoint, all registers are saved, not only the callee-saved ones.
 //
 // Use:
 //
 //   for(StackFrameStream fst(thread); !fst.is_done(); fst.next()) {
 //     ...
 //   }
 //
 class StackFrameStream : public StackObj {
  private:
   frame       _fr;
   RegisterMap _reg_map;
   bool        _is_done;
  public:
    StackFrameStream(JavaThread *thread, bool update = true);
   // Iteration
   bool is_done()                  { return (_is_done) ? true : (_is_done = _fr.is_first_frame(), false); }
   void next()                     { if (!_is_done) _fr = _fr.sender(&_reg_map); }
   // Query
   frame *current()                { return &_fr; }
   RegisterMap* register_map()     { return &_reg_map; }
 };

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/runtime/frame.hpp@126ea7725993 (annotated)

src/share/vm/runtime/frame.hpp