duke@435: /*
xdono@631:  * Copyright 1997-2008 Sun Microsystems, Inc.  All Rights Reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: # include "incls/_precompiled.incl"
duke@435: # include "incls/_frame_x86.cpp.incl"
duke@435: 
duke@435: #ifdef ASSERT
duke@435: void RegisterMap::check_location_valid() {
duke@435: }
duke@435: #endif
duke@435: 
duke@435: 
duke@435: // Profiling/safepoint support
duke@435: 
duke@435: bool frame::safe_for_sender(JavaThread *thread) {
duke@435:   address   sp = (address)_sp;
duke@435:   address   fp = (address)_fp;
duke@435:   address   unextended_sp = (address)_unextended_sp;
sgoldman@542:   // sp must be within the stack
sgoldman@542:   bool sp_safe = (sp <= thread->stack_base()) &&
sgoldman@542:                  (sp >= thread->stack_base() - thread->stack_size());
sgoldman@542: 
sgoldman@542:   if (!sp_safe) {
sgoldman@542:     return false;
sgoldman@542:   }
sgoldman@542: 
sgoldman@542:   // unextended sp must be within the stack and above or equal sp
sgoldman@542:   bool unextended_sp_safe = (unextended_sp <= thread->stack_base()) &&
sgoldman@542:                             (unextended_sp >= sp);
sgoldman@542: 
sgoldman@542:   if (!unextended_sp_safe) {
sgoldman@542:     return false;
sgoldman@542:   }
sgoldman@542: 
sgoldman@542:   // an fp must be within the stack and above (but not equal) sp
sgoldman@542:   bool fp_safe = (fp <= thread->stack_base()) && (fp > sp);
sgoldman@542: 
sgoldman@542:   // We know sp/unextended_sp are safe only fp is questionable here
sgoldman@542: 
sgoldman@542:   // If the current frame is known to the code cache then we can attempt to
sgoldman@542:   // to construct the sender and do some validation of it. This goes a long way
sgoldman@542:   // toward eliminating issues when we get in frame construction code
sgoldman@542: 
sgoldman@542:   if (_cb != NULL ) {
sgoldman@542: 
sgoldman@542:     // First check if frame is complete and tester is reliable
duke@435:     // Unfortunately we can only check frame complete for runtime stubs and nmethod
duke@435:     // other generic buffer blobs are more problematic so we just assume they are
duke@435:     // ok. adapter blobs never have a frame complete and are never ok.
sgoldman@542: 
sgoldman@542:     if (!_cb->is_frame_complete_at(_pc)) {
duke@435:       if (_cb->is_nmethod() || _cb->is_adapter_blob() || _cb->is_runtime_stub()) {
duke@435:         return false;
duke@435:       }
duke@435:     }
sgoldman@542:     // Entry frame checks
sgoldman@542:     if (is_entry_frame()) {
sgoldman@542:       // an entry frame must have a valid fp.
sgoldman@542: 
sgoldman@542:       if (!fp_safe) return false;
sgoldman@542: 
sgoldman@542:       // Validate the JavaCallWrapper an entry frame must have
sgoldman@542: 
sgoldman@542:       address jcw = (address)entry_frame_call_wrapper();
sgoldman@542: 
sgoldman@542:       bool jcw_safe = (jcw <= thread->stack_base()) && ( jcw > fp);
sgoldman@542: 
sgoldman@542:       return jcw_safe;
sgoldman@542: 
sgoldman@542:     }
sgoldman@542: 
sgoldman@542:     intptr_t* sender_sp = NULL;
sgoldman@542:     address   sender_pc = NULL;
sgoldman@542: 
sgoldman@542:     if (is_interpreted_frame()) {
sgoldman@542:       // fp must be safe
sgoldman@542:       if (!fp_safe) {
sgoldman@542:         return false;
sgoldman@542:       }
sgoldman@542: 
sgoldman@542:       sender_pc = (address) this->fp()[return_addr_offset];
sgoldman@542:       sender_sp = (intptr_t*) addr_at(sender_sp_offset);
sgoldman@542: 
sgoldman@542:     } else {
sgoldman@542:       // must be some sort of compiled/runtime frame
sgoldman@542:       // fp does not have to be safe (although it could be check for c1?)
sgoldman@542: 
sgoldman@542:       sender_sp = _unextended_sp + _cb->frame_size();
sgoldman@542:       // On Intel the return_address is always the word on the stack
sgoldman@542:       sender_pc = (address) *(sender_sp-1);
sgoldman@542:     }
sgoldman@542: 
sgoldman@542:     // We must always be able to find a recognizable pc
sgoldman@542:     CodeBlob* sender_blob = CodeCache::find_blob_unsafe(sender_pc);
sgoldman@542:     if (sender_pc == NULL ||  sender_blob == NULL) {
sgoldman@542:       return false;
sgoldman@542:     }
sgoldman@542: 
sgoldman@542: 
sgoldman@542:     // If the potential sender is the interpreter then we can do some more checking
sgoldman@542:     if (Interpreter::contains(sender_pc)) {
sgoldman@542: 
sgoldman@542:       // ebp is always saved in a recognizable place in any code we generate. However
sgoldman@542:       // only if the sender is interpreted/call_stub (c1 too?) are we certain that the saved ebp
sgoldman@542:       // is really a frame pointer.
sgoldman@542: 
sgoldman@542:       intptr_t *saved_fp = (intptr_t*)*(sender_sp - frame::sender_sp_offset);
sgoldman@542:       bool saved_fp_safe = ((address)saved_fp <= thread->stack_base()) && (saved_fp > sender_sp);
sgoldman@542: 
sgoldman@542:       if (!saved_fp_safe) {
sgoldman@542:         return false;
sgoldman@542:       }
sgoldman@542: 
sgoldman@542:       // construct the potential sender
sgoldman@542: 
sgoldman@542:       frame sender(sender_sp, saved_fp, sender_pc);
sgoldman@542: 
sgoldman@542:       return sender.is_interpreted_frame_valid(thread);
sgoldman@542: 
sgoldman@542:     }
sgoldman@542: 
sgoldman@542:     // Could just be some random pointer within the codeBlob
sgoldman@542: 
sgoldman@542:     if (!sender_blob->instructions_contains(sender_pc)) return false;
sgoldman@542: 
sgoldman@542:     // We should never be able to see an adapter if the current frame is something from code cache
sgoldman@542: 
sgoldman@542:     if ( sender_blob->is_adapter_blob()) {
sgoldman@542:       return false;
sgoldman@542:     }
sgoldman@542: 
sgoldman@542:     // Could be the call_stub
sgoldman@542: 
sgoldman@542:     if (StubRoutines::returns_to_call_stub(sender_pc)) {
sgoldman@542:       intptr_t *saved_fp = (intptr_t*)*(sender_sp - frame::sender_sp_offset);
sgoldman@542:       bool saved_fp_safe = ((address)saved_fp <= thread->stack_base()) && (saved_fp > sender_sp);
sgoldman@542: 
sgoldman@542:       if (!saved_fp_safe) {
sgoldman@542:         return false;
sgoldman@542:       }
sgoldman@542: 
sgoldman@542:       // construct the potential sender
sgoldman@542: 
sgoldman@542:       frame sender(sender_sp, saved_fp, sender_pc);
sgoldman@542: 
sgoldman@542:       // Validate the JavaCallWrapper an entry frame must have
sgoldman@542:       address jcw = (address)sender.entry_frame_call_wrapper();
sgoldman@542: 
sgoldman@542:       bool jcw_safe = (jcw <= thread->stack_base()) && ( jcw > (address)sender.fp());
sgoldman@542: 
sgoldman@542:       return jcw_safe;
sgoldman@542:     }
sgoldman@542: 
sgoldman@542:     // If the frame size is 0 something is bad because every nmethod has a non-zero frame size
sgoldman@542:     // because the return address counts against the callee's frame.
sgoldman@542: 
sgoldman@542:     if (sender_blob->frame_size() == 0) {
sgoldman@542:       assert(!sender_blob->is_nmethod(), "should count return address at least");
sgoldman@542:       return false;
sgoldman@542:     }
sgoldman@542: 
sgoldman@542:     // We should never be able to see anything here except an nmethod. If something in the
sgoldman@542:     // code cache (current frame) is called by an entity within the code cache that entity
sgoldman@542:     // should not be anything but the call stub (already covered), the interpreter (already covered)
sgoldman@542:     // or an nmethod.
sgoldman@542: 
sgoldman@542:     assert(sender_blob->is_nmethod(), "Impossible call chain");
sgoldman@542: 
sgoldman@542:     // Could put some more validation for the potential non-interpreted sender
sgoldman@542:     // frame we'd create by calling sender if I could think of any. Wait for next crash in forte...
sgoldman@542: 
sgoldman@542:     // One idea is seeing if the sender_pc we have is one that we'd expect to call to current cb
sgoldman@542: 
sgoldman@542:     // We've validated the potential sender that would be created
duke@435:     return true;
duke@435:   }
sgoldman@542: 
sgoldman@542:   // Must be native-compiled frame. Since sender will try and use fp to find
sgoldman@542:   // linkages it must be safe
sgoldman@542: 
sgoldman@542:   if (!fp_safe) {
sgoldman@542:     return false;
duke@435:   }
sgoldman@542: 
sgoldman@542:   // Will the pc we fetch be non-zero (which we'll find at the oldest frame)
sgoldman@542: 
sgoldman@542:   if ( (address) this->fp()[return_addr_offset] == NULL) return false;
sgoldman@542: 
sgoldman@542: 
sgoldman@542:   // could try and do some more potential verification of native frame if we could think of some...
sgoldman@542: 
sgoldman@542:   return true;
sgoldman@542: 
duke@435: }
duke@435: 
duke@435: 
duke@435: void frame::patch_pc(Thread* thread, address pc) {
duke@435:   if (TracePcPatching) {
never@739:     tty->print_cr("patch_pc at address" INTPTR_FORMAT " [" INTPTR_FORMAT " -> " INTPTR_FORMAT "] ",
never@739:                   &((address *)sp())[-1], ((address *)sp())[-1], pc);
duke@435:   }
duke@435:   ((address *)sp())[-1] = pc;
duke@435:   _cb = CodeCache::find_blob(pc);
duke@435:   if (_cb != NULL && _cb->is_nmethod() && ((nmethod*)_cb)->is_deopt_pc(_pc)) {
duke@435:     address orig = (((nmethod*)_cb)->get_original_pc(this));
duke@435:     assert(orig == _pc, "expected original to be stored before patching");
duke@435:     _deopt_state = is_deoptimized;
duke@435:     // leave _pc as is
duke@435:   } else {
duke@435:     _deopt_state = not_deoptimized;
duke@435:     _pc = pc;
duke@435:   }
duke@435: }
duke@435: 
duke@435: bool frame::is_interpreted_frame() const  {
duke@435:   return Interpreter::contains(pc());
duke@435: }
duke@435: 
cfang@1228: int frame::frame_size(RegisterMap* map) const {
cfang@1228:   frame sender = this->sender(map);
duke@435:   return sender.sp() - sp();
duke@435: }
duke@435: 
duke@435: intptr_t* frame::entry_frame_argument_at(int offset) const {
duke@435:   // convert offset to index to deal with tsi
duke@435:   int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize);
duke@435:   // Entry frame's arguments are always in relation to unextended_sp()
duke@435:   return &unextended_sp()[index];
duke@435: }
duke@435: 
duke@435: // sender_sp
duke@435: #ifdef CC_INTERP
duke@435: intptr_t* frame::interpreter_frame_sender_sp() const {
duke@435:   assert(is_interpreted_frame(), "interpreted frame expected");
duke@435:   // QQQ why does this specialize method exist if frame::sender_sp() does same thing?
duke@435:   // seems odd and if we always know interpreted vs. non then sender_sp() is really
duke@435:   // doing too much work.
duke@435:   return get_interpreterState()->sender_sp();
duke@435: }
duke@435: 
duke@435: // monitor elements
duke@435: 
duke@435: BasicObjectLock* frame::interpreter_frame_monitor_begin() const {
duke@435:   return get_interpreterState()->monitor_base();
duke@435: }
duke@435: 
duke@435: BasicObjectLock* frame::interpreter_frame_monitor_end() const {
duke@435:   return (BasicObjectLock*) get_interpreterState()->stack_base();
duke@435: }
duke@435: 
duke@435: #else // CC_INTERP
duke@435: 
duke@435: intptr_t* frame::interpreter_frame_sender_sp() const {
duke@435:   assert(is_interpreted_frame(), "interpreted frame expected");
duke@435:   return (intptr_t*) at(interpreter_frame_sender_sp_offset);
duke@435: }
duke@435: 
duke@435: void frame::set_interpreter_frame_sender_sp(intptr_t* sender_sp) {
duke@435:   assert(is_interpreted_frame(), "interpreted frame expected");
duke@435:   ptr_at_put(interpreter_frame_sender_sp_offset, (intptr_t) sender_sp);
duke@435: }
duke@435: 
duke@435: 
duke@435: // monitor elements
duke@435: 
duke@435: BasicObjectLock* frame::interpreter_frame_monitor_begin() const {
duke@435:   return (BasicObjectLock*) addr_at(interpreter_frame_monitor_block_bottom_offset);
duke@435: }
duke@435: 
duke@435: BasicObjectLock* frame::interpreter_frame_monitor_end() const {
duke@435:   BasicObjectLock* result = (BasicObjectLock*) *addr_at(interpreter_frame_monitor_block_top_offset);
duke@435:   // make sure the pointer points inside the frame
duke@435:   assert((intptr_t) fp() >  (intptr_t) result, "result must <  than frame pointer");
duke@435:   assert((intptr_t) sp() <= (intptr_t) result, "result must >= than stack pointer");
duke@435:   return result;
duke@435: }
duke@435: 
duke@435: void frame::interpreter_frame_set_monitor_end(BasicObjectLock* value) {
duke@435:   *((BasicObjectLock**)addr_at(interpreter_frame_monitor_block_top_offset)) = value;
duke@435: }
duke@435: 
duke@435: // Used by template based interpreter deoptimization
duke@435: void frame::interpreter_frame_set_last_sp(intptr_t* sp) {
duke@435:     *((intptr_t**)addr_at(interpreter_frame_last_sp_offset)) = sp;
duke@435: }
duke@435: #endif // CC_INTERP
duke@435: 
duke@435: frame frame::sender_for_entry_frame(RegisterMap* map) const {
duke@435:   assert(map != NULL, "map must be set");
duke@435:   // Java frame called from C; skip all C frames and return top C
duke@435:   // frame of that chunk as the sender
duke@435:   JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor();
duke@435:   assert(!entry_frame_is_first(), "next Java fp must be non zero");
duke@435:   assert(jfa->last_Java_sp() > sp(), "must be above this frame on stack");
duke@435:   map->clear();
duke@435:   assert(map->include_argument_oops(), "should be set by clear");
duke@435:   if (jfa->last_Java_pc() != NULL ) {
duke@435:     frame fr(jfa->last_Java_sp(), jfa->last_Java_fp(), jfa->last_Java_pc());
duke@435:     return fr;
duke@435:   }
duke@435:   frame fr(jfa->last_Java_sp(), jfa->last_Java_fp());
duke@435:   return fr;
duke@435: }
duke@435: 
duke@435: frame frame::sender_for_interpreter_frame(RegisterMap* map) const {
duke@435:   // sp is the raw sp from the sender after adapter or interpreter extension
duke@435:   intptr_t* sp = (intptr_t*) addr_at(sender_sp_offset);
duke@435: 
duke@435:   // This is the sp before any possible extension (adapter/locals).
duke@435:   intptr_t* unextended_sp = interpreter_frame_sender_sp();
duke@435: 
duke@435:   // The interpreter and compiler(s) always save EBP/RBP in a known
duke@435:   // location on entry. We must record where that location is
duke@435:   // so this if EBP/RBP was live on callout from c2 we can find
duke@435:   // the saved copy no matter what it called.
duke@435: 
duke@435:   // Since the interpreter always saves EBP/RBP if we record where it is then
duke@435:   // we don't have to always save EBP/RBP on entry and exit to c2 compiled
duke@435:   // code, on entry will be enough.
duke@435: #ifdef COMPILER2
duke@435:   if (map->update_map()) {
duke@435:     map->set_location(rbp->as_VMReg(), (address) addr_at(link_offset));
duke@435: #ifdef AMD64
duke@435:     // this is weird "H" ought to be at a higher address however the
duke@435:     // oopMaps seems to have the "H" regs at the same address and the
duke@435:     // vanilla register.
duke@435:     // XXXX make this go away
duke@435:     if (true) {
duke@435:       map->set_location(rbp->as_VMReg()->next(), (address)addr_at(link_offset));
duke@435:     }
duke@435: #endif // AMD64
duke@435:   }
duke@435: #endif /* COMPILER2 */
duke@435:   return frame(sp, unextended_sp, link(), sender_pc());
duke@435: }
duke@435: 
duke@435: 
duke@435: //------------------------------sender_for_compiled_frame-----------------------
duke@435: frame frame::sender_for_compiled_frame(RegisterMap* map) const {
duke@435:   assert(map != NULL, "map must be set");
duke@435:   const bool c1_compiled = _cb->is_compiled_by_c1();
duke@435: 
duke@435:   // frame owned by optimizing compiler
duke@435:   intptr_t* sender_sp = NULL;
duke@435: 
duke@435:   assert(_cb->frame_size() >= 0, "must have non-zero frame size");
duke@435:   sender_sp = unextended_sp() + _cb->frame_size();
duke@435: 
duke@435:   // On Intel the return_address is always the word on the stack
duke@435:   address sender_pc = (address) *(sender_sp-1);
duke@435: 
duke@435:   // This is the saved value of ebp which may or may not really be an fp.
duke@435:   // it is only an fp if the sender is an interpreter frame (or c1?)
duke@435: 
duke@435:   intptr_t *saved_fp = (intptr_t*)*(sender_sp - frame::sender_sp_offset);
duke@435: 
duke@435:   if (map->update_map()) {
duke@435:     // Tell GC to use argument oopmaps for some runtime stubs that need it.
duke@435:     // For C1, the runtime stub might not have oop maps, so set this flag
duke@435:     // outside of update_register_map.
duke@435:     map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread()));
duke@435:     if (_cb->oop_maps() != NULL) {
duke@435:       OopMapSet::update_register_map(this, map);
duke@435:     }
duke@435:     // Since the prolog does the save and restore of epb there is no oopmap
duke@435:     // for it so we must fill in its location as if there was an oopmap entry
duke@435:     // since if our caller was compiled code there could be live jvm state in it.
duke@435:     map->set_location(rbp->as_VMReg(), (address) (sender_sp - frame::sender_sp_offset));
duke@435: #ifdef AMD64
duke@435:     // this is weird "H" ought to be at a higher address however the
duke@435:     // oopMaps seems to have the "H" regs at the same address and the
duke@435:     // vanilla register.
duke@435:     // XXXX make this go away
duke@435:     if (true) {
duke@435:       map->set_location(rbp->as_VMReg()->next(), (address) (sender_sp - frame::sender_sp_offset));
duke@435:     }
duke@435: #endif // AMD64
duke@435:   }
duke@435: 
duke@435:   assert(sender_sp != sp(), "must have changed");
duke@435:   return frame(sender_sp, saved_fp, sender_pc);
duke@435: }
duke@435: 
duke@435: frame frame::sender(RegisterMap* map) const {
duke@435:   // Default is we done have to follow them. The sender_for_xxx will
duke@435:   // update it accordingly
duke@435:   map->set_include_argument_oops(false);
duke@435: 
duke@435:   if (is_entry_frame())       return sender_for_entry_frame(map);
duke@435:   if (is_interpreted_frame()) return sender_for_interpreter_frame(map);
duke@435:   assert(_cb == CodeCache::find_blob(pc()),"Must be the same");
duke@435: 
duke@435:   if (_cb != NULL) {
duke@435:     return sender_for_compiled_frame(map);
duke@435:   }
duke@435:   // Must be native-compiled frame, i.e. the marshaling code for native
duke@435:   // methods that exists in the core system.
duke@435:   return frame(sender_sp(), link(), sender_pc());
duke@435: }
duke@435: 
duke@435: 
duke@435: bool frame::interpreter_frame_equals_unpacked_fp(intptr_t* fp) {
duke@435:   assert(is_interpreted_frame(), "must be interpreter frame");
duke@435:   methodOop method = interpreter_frame_method();
duke@435:   // When unpacking an optimized frame the frame pointer is
duke@435:   // adjusted with:
duke@435:   int diff = (method->max_locals() - method->size_of_parameters()) *
duke@435:              Interpreter::stackElementWords();
duke@435:   return _fp == (fp - diff);
duke@435: }
duke@435: 
duke@435: void frame::pd_gc_epilog() {
duke@435:   // nothing done here now
duke@435: }
duke@435: 
sgoldman@542: bool frame::is_interpreted_frame_valid(JavaThread* thread) const {
duke@435: // QQQ
duke@435: #ifdef CC_INTERP
duke@435: #else
duke@435:   assert(is_interpreted_frame(), "Not an interpreted frame");
duke@435:   // These are reasonable sanity checks
duke@435:   if (fp() == 0 || (intptr_t(fp()) & (wordSize-1)) != 0) {
duke@435:     return false;
duke@435:   }
duke@435:   if (sp() == 0 || (intptr_t(sp()) & (wordSize-1)) != 0) {
duke@435:     return false;
duke@435:   }
duke@435:   if (fp() + interpreter_frame_initial_sp_offset < sp()) {
duke@435:     return false;
duke@435:   }
duke@435:   // These are hacks to keep us out of trouble.
duke@435:   // The problem with these is that they mask other problems
duke@435:   if (fp() <= sp()) {        // this attempts to deal with unsigned comparison above
duke@435:     return false;
duke@435:   }
sgoldman@542: 
sgoldman@542:   // do some validation of frame elements
sgoldman@542: 
sgoldman@542:   // first the method
sgoldman@542: 
sgoldman@542:   methodOop m = *interpreter_frame_method_addr();
sgoldman@542: 
sgoldman@542:   // validate the method we'd find in this potential sender
sgoldman@542:   if (!Universe::heap()->is_valid_method(m)) return false;
sgoldman@542: 
sgoldman@542:   // stack frames shouldn't be much larger than max_stack elements
sgoldman@542: 
sgoldman@542:   if (fp() - sp() > 1024 + m->max_stack()*Interpreter::stackElementSize()) {
duke@435:     return false;
duke@435:   }
sgoldman@542: 
sgoldman@542:   // validate bci/bcx
sgoldman@542: 
sgoldman@542:   intptr_t  bcx    = interpreter_frame_bcx();
sgoldman@542:   if (m->validate_bci_from_bcx(bcx) < 0) {
sgoldman@542:     return false;
sgoldman@542:   }
sgoldman@542: 
sgoldman@542:   // validate constantPoolCacheOop
sgoldman@542: 
sgoldman@542:   constantPoolCacheOop cp = *interpreter_frame_cache_addr();
sgoldman@542: 
sgoldman@542:   if (cp == NULL ||
sgoldman@542:       !Space::is_aligned(cp) ||
sgoldman@542:       !Universe::heap()->is_permanent((void*)cp)) return false;
sgoldman@542: 
sgoldman@542:   // validate locals
sgoldman@542: 
sgoldman@542:   address locals =  (address) *interpreter_frame_locals_addr();
sgoldman@542: 
sgoldman@542:   if (locals > thread->stack_base() || locals < (address) fp()) return false;
sgoldman@542: 
sgoldman@542:   // We'd have to be pretty unlucky to be mislead at this point
sgoldman@542: 
duke@435: #endif // CC_INTERP
duke@435:   return true;
duke@435: }
duke@435: 
duke@435: BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) {
duke@435: #ifdef CC_INTERP
duke@435:   // Needed for JVMTI. The result should always be in the interpreterState object
duke@435:   assert(false, "NYI");
duke@435:   interpreterState istate = get_interpreterState();
duke@435: #endif // CC_INTERP
duke@435:   assert(is_interpreted_frame(), "interpreted frame expected");
duke@435:   methodOop method = interpreter_frame_method();
duke@435:   BasicType type = method->result_type();
duke@435: 
duke@435:   intptr_t* tos_addr;
duke@435:   if (method->is_native()) {
duke@435:     // Prior to calling into the runtime to report the method_exit the possible
duke@435:     // return value is pushed to the native stack. If the result is a jfloat/jdouble
duke@435:     // then ST0 is saved before EAX/EDX. See the note in generate_native_result
duke@435:     tos_addr = (intptr_t*)sp();
duke@435:     if (type == T_FLOAT || type == T_DOUBLE) {
duke@435:     // QQQ seems like this code is equivalent on the two platforms
duke@435: #ifdef AMD64
duke@435:       // This is times two because we do a push(ltos) after pushing XMM0
duke@435:       // and that takes two interpreter stack slots.
duke@435:       tos_addr += 2 * Interpreter::stackElementWords();
duke@435: #else
duke@435:       tos_addr += 2;
duke@435: #endif // AMD64
duke@435:     }
duke@435:   } else {
duke@435:     tos_addr = (intptr_t*)interpreter_frame_tos_address();
duke@435:   }
duke@435: 
duke@435:   switch (type) {
duke@435:     case T_OBJECT  :
duke@435:     case T_ARRAY   : {
duke@435:       oop obj;
duke@435:       if (method->is_native()) {
duke@435: #ifdef CC_INTERP
duke@435:         obj = istate->_oop_temp;
duke@435: #else
duke@435:         obj = (oop) at(interpreter_frame_oop_temp_offset);
duke@435: #endif // CC_INTERP
duke@435:       } else {
duke@435:         oop* obj_p = (oop*)tos_addr;
duke@435:         obj = (obj_p == NULL) ? (oop)NULL : *obj_p;
duke@435:       }
duke@435:       assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check");
duke@435:       *oop_result = obj;
duke@435:       break;
duke@435:     }
duke@435:     case T_BOOLEAN : value_result->z = *(jboolean*)tos_addr; break;
duke@435:     case T_BYTE    : value_result->b = *(jbyte*)tos_addr; break;
duke@435:     case T_CHAR    : value_result->c = *(jchar*)tos_addr; break;
duke@435:     case T_SHORT   : value_result->s = *(jshort*)tos_addr; break;
duke@435:     case T_INT     : value_result->i = *(jint*)tos_addr; break;
duke@435:     case T_LONG    : value_result->j = *(jlong*)tos_addr; break;
duke@435:     case T_FLOAT   : {
duke@435: #ifdef AMD64
duke@435:         value_result->f = *(jfloat*)tos_addr;
duke@435: #else
duke@435:       if (method->is_native()) {
duke@435:         jdouble d = *(jdouble*)tos_addr;  // Result was in ST0 so need to convert to jfloat
duke@435:         value_result->f = (jfloat)d;
duke@435:       } else {
duke@435:         value_result->f = *(jfloat*)tos_addr;
duke@435:       }
duke@435: #endif // AMD64
duke@435:       break;
duke@435:     }
duke@435:     case T_DOUBLE  : value_result->d = *(jdouble*)tos_addr; break;
duke@435:     case T_VOID    : /* Nothing to do */ break;
duke@435:     default        : ShouldNotReachHere();
duke@435:   }
duke@435: 
duke@435:   return type;
duke@435: }
duke@435: 
duke@435: 
duke@435: intptr_t* frame::interpreter_frame_tos_at(jint offset) const {
duke@435:   int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize);
duke@435:   return &interpreter_frame_tos_address()[index];
duke@435: }