graal-compiler: src/share/vm/runtime/frame.hpp comparison

comparison src/share/vm/runtime/frame.hpp @ 0:a61af66fc99e jdk7-b24

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author	duke
date	Sat, 01 Dec 2007 00:00:00 +0000
parents
children	93b6525e3b82

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+:a61af66fc99e
+/*
+* Copyright 1997-2007 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.
+*
+*/
+typedef class BytecodeInterpreter* interpreterState;
+class CodeBlob;
+// 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() 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() 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:
+// Tags for TaggedStackInterpreter
+enum Tag {
+TagValue = 0,          // Important: must be zero to use G0 on sparc.
+TagReference = 0x555,  // Reference type - is an oop that needs gc.
+TagCategory2 = 0x666   // Only used internally by interpreter
+// and not written to the java stack.
+// The values above are chosen so that misuse causes a crash
+// with a recognizable value.
+};
+static Tag tag_for_basic_type(BasicType typ) {
+return (typ == T_OBJECT ? TagReference : TagValue);
+}
+// Locals
+// The _at version returns a pointer because the address is used for GC.
+intptr_t* interpreter_frame_local_at(int index) const;
+Tag       interpreter_frame_local_tag(int index) const;
+void      interpreter_frame_set_local_tag(int index, Tag tag) 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;
+Tag       interpreter_frame_expression_stack_tag(jint offset) const;
+void      interpreter_frame_set_expression_stack_tag(jint offset, Tag tag) 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;
+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 is_static, 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_locals_do(OopClosure *f,
+int max_locals,
+InterpreterOopMap *mask);
+void oops_interpreted_expressions_do(OopClosure *f, symbolHandle signature,
+bool is_static, int max_stack, int max_locals,
+InterpreterOopMap *mask);
+void oops_interpreted_arguments_do(symbolHandle signature, bool is_static, OopClosure* f);
+// Iteration of oops
+void oops_do_internal(OopClosure* f, RegisterMap* map, bool use_interpreter_oop_map_cache);
+void oops_entry_do(OopClosure* f, const RegisterMap* map);
+void oops_code_blob_do(OopClosure* f, const RegisterMap* map);
+int adjust_offset(methodOop method, int index); // helper for above fn
+// Iteration of nmethods
+void nmethods_code_blob_do();
+public:
+// Memory management
+void oops_do(OopClosure* f, RegisterMap* map) { oops_do_internal(f, map, true); }
+void nmethods_do();
+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);
+};
+static CheckValueClosure _check_value;
+class CheckOopClosure: public OopClosure {
+public: void do_oop(oop* p);
+};
+static CheckOopClosure _check_oop;
+static void check_derived_oop(oop* base, oop* derived);
+class ZapDeadClosure: public OopClosure {
+public: void do_oop(oop* p);
+};
+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 > hg > graal-compiler

comparison src/share/vm/runtime/frame.hpp @ 0:a61af66fc99e jdk7-b24