Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.

  * Copyright 2012, 2014 SAP AG. 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.

  *

  */

 #include "precompiled.hpp"

 #include "interpreter/interpreter.hpp"

 #include "memory/resourceArea.hpp"

 #include "oops/markOop.hpp"

 #include "oops/method.hpp"

 #include "oops/oop.inline.hpp"

 #include "runtime/frame.inline.hpp"

 #include "runtime/handles.inline.hpp"

 #include "runtime/javaCalls.hpp"

 #include "runtime/monitorChunk.hpp"

 #include "runtime/signature.hpp"

 #include "runtime/stubCodeGenerator.hpp"

 #include "runtime/stubRoutines.hpp"

 #include "vmreg_ppc.inline.hpp"

 #ifdef COMPILER1

 #include "c1/c1_Runtime1.hpp"

 #include "runtime/vframeArray.hpp"

 #endif

 #ifdef ASSERT

 void RegisterMap::check_location_valid() {

 }

 #endif // ASSERT

 bool frame::safe_for_sender(JavaThread *thread) {

   bool safe = false;

   address   cursp = (address)sp();

   address   curfp = (address)fp();

   if ((cursp != NULL && curfp != NULL &&

       (cursp <= thread->stack_base() && cursp >= thread->stack_base() - thread->stack_size())) &&

       (curfp <= thread->stack_base() && curfp >= thread->stack_base() - thread->stack_size())) {

       safe = true;

   }

   return safe;

 }

 bool frame::is_interpreted_frame() const  {

   return Interpreter::contains(pc());

 }

 frame frame::sender_for_entry_frame(RegisterMap *map) const {

   assert(map != NULL, "map must be set");

   // Java frame called from C; skip all C frames and return top C

   // frame of that chunk as the sender.

   JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor();

   assert(!entry_frame_is_first(), "next Java fp must be non zero");

   assert(jfa->last_Java_sp() > _sp, "must be above this frame on stack");

   map->clear();

   assert(map->include_argument_oops(), "should be set by clear");

   if (jfa->last_Java_pc() != NULL) {

     frame fr(jfa->last_Java_sp(), jfa->last_Java_pc());

     return fr;

   }

   // Last_java_pc is not set, if we come here from compiled code. The

   // constructor retrieves the PC from the stack.

   frame fr(jfa->last_Java_sp());

   return fr;

 }

 frame frame::sender_for_interpreter_frame(RegisterMap *map) const {

   // Pass callers initial_caller_sp as unextended_sp.

   return frame(sender_sp(), sender_pc(),

                CC_INTERP_ONLY((intptr_t*)((parent_ijava_frame_abi *)callers_abi())->initial_caller_sp)

                NOT_CC_INTERP((intptr_t*)get_ijava_state()->sender_sp)

                );

 }

 frame frame::sender_for_compiled_frame(RegisterMap *map) const {

   assert(map != NULL, "map must be set");

   // Frame owned by compiler.

   address pc = *compiled_sender_pc_addr(_cb);

   frame caller(compiled_sender_sp(_cb), pc);

   // Now adjust the map.

   // Get the rest.

   if (map->update_map()) {

     // Tell GC to use argument oopmaps for some runtime stubs that need it.

     map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread()));

     if (_cb->oop_maps() != NULL) {

       OopMapSet::update_register_map(this, map);

     }

   }

   return caller;

 }

 intptr_t* frame::compiled_sender_sp(CodeBlob* cb) const {

   return sender_sp();

 }

 address* frame::compiled_sender_pc_addr(CodeBlob* cb) const {

   return sender_pc_addr();

 }

 frame frame::sender(RegisterMap* map) const {

   // Default is we do have to follow them. The sender_for_xxx will

   // update it accordingly.

   map->set_include_argument_oops(false);

   if (is_entry_frame())       return sender_for_entry_frame(map);

   if (is_interpreted_frame()) return sender_for_interpreter_frame(map);

   assert(_cb == CodeCache::find_blob(pc()),"Must be the same");

   if (_cb != NULL) {

     return sender_for_compiled_frame(map);

   }

   // Must be native-compiled frame, i.e. the marshaling code for native

   // methods that exists in the core system.

   return frame(sender_sp(), sender_pc());

 }

 void frame::patch_pc(Thread* thread, address pc) {

   if (TracePcPatching) {

     tty->print_cr("patch_pc at address " PTR_FORMAT " [" PTR_FORMAT " -> " PTR_FORMAT "]",

                   p2i(&((address*) _sp)[-1]), p2i(((address*) _sp)[-1]), p2i(pc));

   }

   own_abi()->lr = (uint64_t)pc;

   _cb = CodeCache::find_blob(pc);

   if (_cb != NULL && _cb->is_nmethod() && ((nmethod*)_cb)->is_deopt_pc(_pc)) {

     address orig = (((nmethod*)_cb)->get_original_pc(this));

     assert(orig == _pc, "expected original to be stored before patching");

     _deopt_state = is_deoptimized;

     // Leave _pc as is.

   } else {

     _deopt_state = not_deoptimized;

     _pc = pc;

   }

 }

 void frame::pd_gc_epilog() {

   if (is_interpreted_frame()) {

     // Set constant pool cache entry for interpreter.

     Method* m = interpreter_frame_method();

     *interpreter_frame_cpoolcache_addr() = m->constants()->cache();

   }

 }

 bool frame::is_interpreted_frame_valid(JavaThread* thread) const {

   // Is there anything to do?

   assert(is_interpreted_frame(), "Not an interpreted frame");

   return true;

 }

 BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) {

   assert(is_interpreted_frame(), "interpreted frame expected");

   Method* method = interpreter_frame_method();

   BasicType type = method->result_type();

   if (method->is_native()) {

     // Prior to calling into the runtime to notify the method exit the possible

     // result value is saved into the interpreter frame.

 #ifdef CC_INTERP

     interpreterState istate = get_interpreterState();

     address lresult = (address)istate + in_bytes(BytecodeInterpreter::native_lresult_offset());

     address fresult = (address)istate + in_bytes(BytecodeInterpreter::native_fresult_offset());

 #else

     address lresult = (address)&(get_ijava_state()->lresult);

     address fresult = (address)&(get_ijava_state()->fresult);

 #endif

     switch (method->result_type()) {

       case T_OBJECT:

       case T_ARRAY: {

         oop* obj_p = *(oop**)lresult;

         oop obj = (obj_p == NULL) ? (oop)NULL : *obj_p;

         assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check");

         *oop_result = obj;

         break;

       }

       // We use std/stfd to store the values.

       case T_BOOLEAN : value_result->z = (jboolean) *(unsigned long*)lresult; break;

       case T_INT     : value_result->i = (jint)     *(long*)lresult;          break;

       case T_CHAR    : value_result->c = (jchar)    *(unsigned long*)lresult; break;

       case T_SHORT   : value_result->s = (jshort)   *(long*)lresult;          break;

       case T_BYTE    : value_result->z = (jbyte)    *(long*)lresult;          break;

       case T_LONG    : value_result->j = (jlong)    *(long*)lresult;          break;

       case T_FLOAT   : value_result->f = (jfloat)   *(double*)fresult;        break;

       case T_DOUBLE  : value_result->d = (jdouble)  *(double*)fresult;        break;

       case T_VOID    : /* Nothing to do */ break;

       default        : ShouldNotReachHere();

     }

   } else {

     intptr_t* tos_addr = interpreter_frame_tos_address();

     switch (method->result_type()) {

       case T_OBJECT:

       case T_ARRAY: {

         oop obj = *(oop*)tos_addr;

         assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check");

         *oop_result = obj;

       }

       case T_BOOLEAN : value_result->z = (jboolean) *(jint*)tos_addr; break;

       case T_BYTE    : value_result->b = (jbyte) *(jint*)tos_addr; break;

       case T_CHAR    : value_result->c = (jchar) *(jint*)tos_addr; break;

       case T_SHORT   : value_result->s = (jshort) *(jint*)tos_addr; break;

       case T_INT     : value_result->i = *(jint*)tos_addr; break;

       case T_LONG    : value_result->j = *(jlong*)tos_addr; break;

       case T_FLOAT   : value_result->f = *(jfloat*)tos_addr; break;

       case T_DOUBLE  : value_result->d = *(jdouble*)tos_addr; break;

       case T_VOID    : /* Nothing to do */ break;

       default        : ShouldNotReachHere();

     }

   }

   return type;

 }

 #ifndef PRODUCT

 void frame::describe_pd(FrameValues& values, int frame_no) {

   if (is_interpreted_frame()) {

 #ifdef CC_INTERP

     interpreterState istate = get_interpreterState();

     values.describe(frame_no, (intptr_t*)istate, "istate");

     values.describe(frame_no, (intptr_t*)&(istate->_thread), " thread");

     values.describe(frame_no, (intptr_t*)&(istate->_bcp), " bcp");

     values.describe(frame_no, (intptr_t*)&(istate->_locals), " locals");

     values.describe(frame_no, (intptr_t*)&(istate->_constants), " constants");

     values.describe(frame_no, (intptr_t*)&(istate->_method), err_msg(" method = %s", istate->_method->name_and_sig_as_C_string()));

     values.describe(frame_no, (intptr_t*)&(istate->_mdx), " mdx");

     values.describe(frame_no, (intptr_t*)&(istate->_stack), " stack");

     values.describe(frame_no, (intptr_t*)&(istate->_msg), err_msg(" msg = %s", BytecodeInterpreter::C_msg(istate->_msg)));

     values.describe(frame_no, (intptr_t*)&(istate->_result), " result");

     values.describe(frame_no, (intptr_t*)&(istate->_prev_link), " prev_link");

     values.describe(frame_no, (intptr_t*)&(istate->_oop_temp), " oop_temp");

     values.describe(frame_no, (intptr_t*)&(istate->_stack_base), " stack_base");

     values.describe(frame_no, (intptr_t*)&(istate->_stack_limit), " stack_limit");

     values.describe(frame_no, (intptr_t*)&(istate->_monitor_base), " monitor_base");

     values.describe(frame_no, (intptr_t*)&(istate->_frame_bottom), " frame_bottom");

     values.describe(frame_no, (intptr_t*)&(istate->_last_Java_pc), " last_Java_pc");

     values.describe(frame_no, (intptr_t*)&(istate->_last_Java_fp), " last_Java_fp");

     values.describe(frame_no, (intptr_t*)&(istate->_last_Java_sp), " last_Java_sp");

     values.describe(frame_no, (intptr_t*)&(istate->_self_link), " self_link");

     values.describe(frame_no, (intptr_t*)&(istate->_native_fresult), " native_fresult");

     values.describe(frame_no, (intptr_t*)&(istate->_native_lresult), " native_lresult");

 #else

 #define DESCRIBE_ADDRESS(name) \

   values.describe(frame_no, (intptr_t*)&(get_ijava_state()->name), #name);

       DESCRIBE_ADDRESS(method);

       DESCRIBE_ADDRESS(locals);

       DESCRIBE_ADDRESS(monitors);

       DESCRIBE_ADDRESS(cpoolCache);

       DESCRIBE_ADDRESS(bcp);

       DESCRIBE_ADDRESS(esp);

       DESCRIBE_ADDRESS(mdx);

       DESCRIBE_ADDRESS(top_frame_sp);

       DESCRIBE_ADDRESS(sender_sp);

       DESCRIBE_ADDRESS(oop_tmp);

       DESCRIBE_ADDRESS(lresult);

       DESCRIBE_ADDRESS(fresult);

 #endif

   }

 }

 #endif

 void frame::adjust_unextended_sp() {

   // If we are returning to a compiled MethodHandle call site, the

   // saved_fp will in fact be a saved value of the unextended SP. The

   // simplest way to tell whether we are returning to such a call site

   // is as follows:

   if (is_compiled_frame() && false /*is_at_mh_callsite()*/) {  // TODO PPC port

     // If the sender PC is a deoptimization point, get the original

     // PC. For MethodHandle call site the unextended_sp is stored in

     // saved_fp.

     _unextended_sp = _fp - _cb->frame_size();

 #ifdef ASSERT

     nmethod *sender_nm = _cb->as_nmethod_or_null();

     assert(sender_nm && *_sp == *_unextended_sp, "backlink changed");

     intptr_t* sp = _unextended_sp;  // check if stack can be walked from here

     for (int x = 0; x < 5; ++x) {   // check up to a couple of backlinks

       intptr_t* prev_sp = *(intptr_t**)sp;

       if (prev_sp == 0) break;      // end of stack

       assert(prev_sp>sp, "broken stack");

       sp = prev_sp;

     }

     if (sender_nm->is_deopt_mh_entry(_pc)) { // checks for deoptimization

       address original_pc = sender_nm->get_original_pc(this);

       assert(sender_nm->insts_contains(original_pc), "original PC must be in nmethod");

       assert(sender_nm->is_method_handle_return(original_pc), "must be");

     }

 #endif

   }

 }

 intptr_t *frame::initial_deoptimization_info() {

   // unused... but returns fp() to minimize changes introduced by 7087445

   return fp();

 }

 #ifndef PRODUCT

 // This is a generic constructor which is only used by pns() in debug.cpp.

 frame::frame(void* sp, void* fp, void* pc) : _sp((intptr_t*)sp), _unextended_sp((intptr_t*)sp) {

   find_codeblob_and_set_pc_and_deopt_state((address)pc); // also sets _fp and adjusts _unextended_sp

 }

 #endif