1 /*

     2  * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.

     3  * Copyright (c) 2014, Red Hat Inc. All rights reserved.

     4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     5  *

     6  * This code is free software; you can redistribute it and/or modify it

     7  * under the terms of the GNU General Public License version 2 only, as

     8  * published by the Free Software Foundation.

     9  *

    10  * This code is distributed in the hope that it will be useful, but WITHOUT

    11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    13  * version 2 for more details (a copy is included in the LICENSE file that

    14  * accompanied this code).

    15  *

    16  * You should have received a copy of the GNU General Public License version

    17  * 2 along with this work; if not, write to the Free Software Foundation,

    18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    19  *

    20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    21  * or visit www.oracle.com if you need additional information or have any

    22  * questions.

    23  *

    24  */

    25 

    26 #ifndef CPU_AARCH64_VM_FRAME_AARCH64_INLINE_HPP

    27 #define CPU_AARCH64_VM_FRAME_AARCH64_INLINE_HPP

    28 

    29 #include "code/codeCache.hpp"

    30 #include "code/vmreg.inline.hpp"

    31 

    32 // Inline functions for AArch64 frames:

    33 

    34 // Constructors:

    35 

    36 inline frame::frame() {

    37   _pc = NULL;

    38   _sp = NULL;

    39   _unextended_sp = NULL;

    40   _fp = NULL;

    41   _cb = NULL;

    42   _deopt_state = unknown;

    43 }

    44 

    45 static int spin;

    46 

    47 inline void frame::init(intptr_t* sp, intptr_t* fp, address pc) {

    48   intptr_t a = intptr_t(sp);

    49   intptr_t b = intptr_t(fp);

    50   _sp = sp;

    51   _unextended_sp = sp;

    52   _fp = fp;

    53   _pc = pc;

    54   assert(pc != NULL, "no pc?");

    55   _cb = CodeCache::find_blob(pc);

    56   adjust_unextended_sp();

    57 

    58   address original_pc = CompiledMethod::get_deopt_original_pc(this);

    59   if (original_pc != NULL) {

    60     _pc = original_pc;

    61     _deopt_state = is_deoptimized;

    62   } else {

    63     _deopt_state = not_deoptimized;

    64   }

    65 }

    66 

    67 inline frame::frame(intptr_t* sp, intptr_t* fp, address pc) {

    68   init(sp, fp, pc);

    69 }

    70 

    71 inline frame::frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc) {

    72   intptr_t a = intptr_t(sp);

    73   intptr_t b = intptr_t(fp);

    74   _sp = sp;

    75   _unextended_sp = unextended_sp;

    76   _fp = fp;

    77   _pc = pc;

    78   assert(pc != NULL, "no pc?");

    79   _cb = CodeCache::find_blob(pc);

    80   adjust_unextended_sp();

    81 

    82   address original_pc = CompiledMethod::get_deopt_original_pc(this);

    83   if (original_pc != NULL) {

    84     _pc = original_pc;

    85     assert(_cb->as_compiled_method()->insts_contains_inclusive(_pc),

    86            "original PC must be in the main code section of the the compiled method (or must be immediately following it)");

    87     _deopt_state = is_deoptimized;

    88   } else {

    89     _deopt_state = not_deoptimized;

    90   }

    91 }

    92 

    93 inline frame::frame(intptr_t* sp, intptr_t* fp) {

    94   intptr_t a = intptr_t(sp);

    95   intptr_t b = intptr_t(fp);

    96   _sp = sp;

    97   _unextended_sp = sp;

    98   _fp = fp;

    99   _pc = (address)(sp[-1]);

   100 

   101   // Here's a sticky one. This constructor can be called via AsyncGetCallTrace

   102   // when last_Java_sp is non-null but the pc fetched is junk. If we are truly

   103   // unlucky the junk value could be to a zombied method and we'll die on the

   104   // find_blob call. This is also why we can have no asserts on the validity

   105   // of the pc we find here. AsyncGetCallTrace -> pd_get_top_frame_for_signal_handler

   106   // -> pd_last_frame should use a specialized version of pd_last_frame which could

   107   // call a specilaized frame constructor instead of this one.

   108   // Then we could use the assert below. However this assert is of somewhat dubious

   109   // value.

   110   // assert(_pc != NULL, "no pc?");

   111 

   112   _cb = CodeCache::find_blob(_pc);

   113   adjust_unextended_sp();

   114 

   115   address original_pc = CompiledMethod::get_deopt_original_pc(this);

   116   if (original_pc != NULL) {

   117     _pc = original_pc;

   118     _deopt_state = is_deoptimized;

   119   } else {

   120     _deopt_state = not_deoptimized;

   121   }

   122 }

   123 

   124 // Accessors

   125 

   126 inline bool frame::equal(frame other) const {

   127   bool ret =  sp() == other.sp()

   128               && unextended_sp() == other.unextended_sp()

   129               && fp() == other.fp()

   130               && pc() == other.pc();

   131   assert(!ret || ret && cb() == other.cb() && _deopt_state == other._deopt_state, "inconsistent construction");

   132   return ret;

   133 }

   134 

   135 // Return unique id for this frame. The id must have a value where we can distinguish

   136 // identity and younger/older relationship. NULL represents an invalid (incomparable)

   137 // frame.

   138 inline intptr_t* frame::id(void) const { return unextended_sp(); }

   139 

   140 // Relationals on frames based

   141 // Return true if the frame is younger (more recent activation) than the frame represented by id

   142 inline bool frame::is_younger(intptr_t* id) const { assert(this->id() != NULL && id != NULL, "NULL frame id");

   143                                                     return this->id() < id ; }

   144 

   145 // Return true if the frame is older (less recent activation) than the frame represented by id

   146 inline bool frame::is_older(intptr_t* id) const   { assert(this->id() != NULL && id != NULL, "NULL frame id");

   147                                                     return this->id() > id ; }

   148 

   149 

   150 

   151 inline intptr_t* frame::link() const              { return (intptr_t*) *(intptr_t **)addr_at(link_offset); }

   152 

   153 

   154 inline intptr_t* frame::unextended_sp() const     { return _unextended_sp; }

   155 

   156 // Return address:

   157 

   158 inline address* frame::sender_pc_addr()      const { return (address*) addr_at( return_addr_offset); }

   159 inline address  frame::sender_pc()           const { return *sender_pc_addr(); }

   160 

   161 inline intptr_t*    frame::sender_sp()        const { return            addr_at(   sender_sp_offset); }

   162 

   163 inline intptr_t** frame::interpreter_frame_locals_addr() const {

   164   return (intptr_t**)addr_at(interpreter_frame_locals_offset);

   165 }

   166 

   167 inline intptr_t* frame::interpreter_frame_last_sp() const {

   168   return *(intptr_t**)addr_at(interpreter_frame_last_sp_offset);

   169 }

   170 

   171 inline intptr_t* frame::interpreter_frame_bcp_addr() const {

   172   return (intptr_t*)addr_at(interpreter_frame_bcp_offset);

   173 }

   174 

   175 inline intptr_t* frame::interpreter_frame_mdp_addr() const {

   176   return (intptr_t*)addr_at(interpreter_frame_mdp_offset);

   177 }

   178 

   179 

   180 // Constant pool cache

   181 

   182 inline ConstantPoolCache** frame::interpreter_frame_cache_addr() const {

   183   return (ConstantPoolCache**)addr_at(interpreter_frame_cache_offset);

   184 }

   185 

   186 // Method

   187 

   188 inline Method** frame::interpreter_frame_method_addr() const {

   189   return (Method**)addr_at(interpreter_frame_method_offset);

   190 }

   191 

   192 // Mirror

   193 

   194 inline oop* frame::interpreter_frame_mirror_addr() const {

   195   return (oop*)addr_at(interpreter_frame_mirror_offset);

   196 }

   197 

   198 // top of expression stack

   199 inline intptr_t* frame::interpreter_frame_tos_address() const {

   200   intptr_t* last_sp = interpreter_frame_last_sp();

   201   if (last_sp == NULL) {

   202     return sp();

   203   } else {

   204     // sp() may have been extended or shrunk by an adapter.  At least

   205     // check that we don't fall behind the legal region.

   206     // For top deoptimized frame last_sp == interpreter_frame_monitor_end.

   207     assert(last_sp <= (intptr_t*) interpreter_frame_monitor_end(), "bad tos");

   208     return last_sp;

   209   }

   210 }

   211 

   212 inline oop* frame::interpreter_frame_temp_oop_addr() const {

   213   return (oop *)(fp() + interpreter_frame_oop_temp_offset);

   214 }

   215 

   216 inline int frame::pd_oop_map_offset_adjustment() const {

   217   return 0;

   218 }

   219 

   220 inline int frame::interpreter_frame_monitor_size() {

   221   return BasicObjectLock::size();

   222 }

   223 

   224 

   225 // expression stack

   226 // (the max_stack arguments are used by the GC; see class FrameClosure)

   227 

   228 inline intptr_t* frame::interpreter_frame_expression_stack() const {

   229   intptr_t* monitor_end = (intptr_t*) interpreter_frame_monitor_end();

   230   return monitor_end-1;

   231 }

   232 

   233 

   234 inline jint frame::interpreter_frame_expression_stack_direction() { return -1; }

   235 

   236 

   237 // Entry frames

   238 

   239 inline JavaCallWrapper** frame::entry_frame_call_wrapper_addr() const {

   240  return (JavaCallWrapper**)addr_at(entry_frame_call_wrapper_offset);

   241 }

   242 

   243 

   244 // Compiled frames

   245 

   246 inline int frame::local_offset_for_compiler(int local_index, int nof_args, int max_nof_locals, int max_nof_monitors) {

   247   return (nof_args - local_index + (local_index < nof_args ? 1: -1));

   248 }

   249 

   250 inline int frame::monitor_offset_for_compiler(int local_index, int nof_args, int max_nof_locals, int max_nof_monitors) {

   251   return local_offset_for_compiler(local_index, nof_args, max_nof_locals, max_nof_monitors);

   252 }

   253 

   254 inline int frame::min_local_offset_for_compiler(int nof_args, int max_nof_locals, int max_nof_monitors) {

   255   return (nof_args - (max_nof_locals + max_nof_monitors*2) - 1);

   256 }

   257 

   258 inline bool frame::volatile_across_calls(Register reg) {

   259   return true;

   260 }

   261 

   262 

   263 

   264 inline oop frame::saved_oop_result(RegisterMap* map) const {

   265   oop* result_adr = (oop *)map->location(r0->as_VMReg());

   266   guarantee(result_adr != NULL, "bad register save location");

   267 

   268   return (*result_adr);

   269 }

   270 

   271 inline void frame::set_saved_oop_result(RegisterMap* map, oop obj) {

   272   oop* result_adr = (oop *)map->location(r0->as_VMReg());

   273   guarantee(result_adr != NULL, "bad register save location");

   274 

   275   *result_adr = obj;

   276 }

   277 

   278 #endif // CPU_AARCH64_VM_FRAME_AARCH64_INLINE_HPP