1 /* 2 * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2012, 2014 SAP AG. 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 #include "precompiled.hpp" 27 #include "interpreter/interpreter.hpp" 28 #include "memory/resourceArea.hpp" 29 #include "oops/markOop.hpp" 30 #include "oops/method.hpp" 31 #include "oops/oop.inline.hpp" 32 #include "runtime/frame.inline.hpp" 33 #include "runtime/handles.inline.hpp" 34 #include "runtime/javaCalls.hpp" 35 #include "runtime/monitorChunk.hpp" 36 #include "runtime/signature.hpp" 37 #include "runtime/stubCodeGenerator.hpp" 38 #include "runtime/stubRoutines.hpp" 39 #ifdef COMPILER1 40 #include "c1/c1_Runtime1.hpp" 41 #include "runtime/vframeArray.hpp" 42 #endif 43 44 #ifdef ASSERT 45 void RegisterMap::check_location_valid() { 46 } 47 #endif // ASSERT 48 49 bool frame::safe_for_sender(JavaThread *thread) { 50 bool safe = false; 51 address cursp = (address)sp(); 52 address curfp = (address)fp(); 53 if ((cursp != NULL && curfp != NULL && 54 (cursp <= thread->stack_base() && cursp >= thread->stack_base() - thread->stack_size())) && 55 (curfp <= thread->stack_base() && curfp >= thread->stack_base() - thread->stack_size())) { 56 safe = true; 57 } 58 return safe; 59 } 60 61 bool frame::is_interpreted_frame() const { 62 return Interpreter::contains(pc()); 63 } 64 65 frame frame::sender_for_entry_frame(RegisterMap *map) const { 66 assert(map != NULL, "map must be set"); 67 // Java frame called from C; skip all C frames and return top C 68 // frame of that chunk as the sender. 69 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor(); 70 assert(!entry_frame_is_first(), "next Java fp must be non zero"); 71 assert(jfa->last_Java_sp() > _sp, "must be above this frame on stack"); 72 map->clear(); 73 assert(map->include_argument_oops(), "should be set by clear"); 74 75 if (jfa->last_Java_pc() != NULL) { 76 frame fr(jfa->last_Java_sp(), jfa->last_Java_pc()); 77 return fr; 78 } 79 // Last_java_pc is not set, if we come here from compiled code. The 80 // constructor retrieves the PC from the stack. 81 frame fr(jfa->last_Java_sp()); 82 return fr; 83 } 84 85 frame frame::sender_for_interpreter_frame(RegisterMap *map) const { 86 // Pass callers initial_caller_sp as unextended_sp. 87 return frame(sender_sp(), sender_pc(), 88 CC_INTERP_ONLY((intptr_t*)((parent_ijava_frame_abi *)callers_abi())->initial_caller_sp) 89 NOT_CC_INTERP((intptr_t*)get_ijava_state()->sender_sp) 90 ); 91 } 92 93 frame frame::sender_for_compiled_frame(RegisterMap *map) const { 94 assert(map != NULL, "map must be set"); 95 96 // Frame owned by compiler. 97 address pc = *compiled_sender_pc_addr(_cb); 98 frame caller(compiled_sender_sp(_cb), pc); 99 100 // Now adjust the map. 101 102 // Get the rest. 103 if (map->update_map()) { 104 // Tell GC to use argument oopmaps for some runtime stubs that need it. 105 map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread())); 106 if (_cb->oop_maps() != NULL) { 107 OopMapSet::update_register_map(this, map); 108 } 109 } 110 111 return caller; 112 } 113 114 intptr_t* frame::compiled_sender_sp(CodeBlob* cb) const { 115 return sender_sp(); 116 } 117 118 address* frame::compiled_sender_pc_addr(CodeBlob* cb) const { 119 return sender_pc_addr(); 120 } 121 122 frame frame::sender(RegisterMap* map) const { 123 // Default is we do have to follow them. The sender_for_xxx will 124 // update it accordingly. 125 map->set_include_argument_oops(false); 126 127 if (is_entry_frame()) return sender_for_entry_frame(map); 128 if (is_interpreted_frame()) return sender_for_interpreter_frame(map); 129 assert(_cb == CodeCache::find_blob(pc()),"Must be the same"); 130 131 if (_cb != NULL) { 132 return sender_for_compiled_frame(map); 133 } 134 // Must be native-compiled frame, i.e. the marshaling code for native 135 // methods that exists in the core system. 136 return frame(sender_sp(), sender_pc()); 137 } 138 139 void frame::patch_pc(Thread* thread, address pc) { 140 if (TracePcPatching) { 141 tty->print_cr("patch_pc at address " PTR_FORMAT " [" PTR_FORMAT " -> " PTR_FORMAT "]", 142 p2i(&((address*) _sp)[-1]), p2i(((address*) _sp)[-1]), p2i(pc)); 143 } 144 own_abi()->lr = (uint64_t)pc; 145 _cb = CodeCache::find_blob(pc); 146 if (_cb != NULL && _cb->is_nmethod() && ((nmethod*)_cb)->is_deopt_pc(_pc)) { 147 address orig = (((nmethod*)_cb)->get_original_pc(this)); 148 assert(orig == _pc, "expected original to be stored before patching"); 149 _deopt_state = is_deoptimized; 150 // Leave _pc as is. 151 } else { 152 _deopt_state = not_deoptimized; 153 _pc = pc; 154 } 155 } 156 157 bool frame::is_interpreted_frame_valid(JavaThread* thread) const { 158 // Is there anything to do? 159 assert(is_interpreted_frame(), "Not an interpreted frame"); 160 return true; 161 } 162 163 BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) { 164 assert(is_interpreted_frame(), "interpreted frame expected"); 165 Method* method = interpreter_frame_method(); 166 BasicType type = method->result_type(); 167 168 if (method->is_native()) { 169 // Prior to calling into the runtime to notify the method exit the possible 170 // result value is saved into the interpreter frame. 171 #ifdef CC_INTERP 172 interpreterState istate = get_interpreterState(); 173 address lresult = (address)istate + in_bytes(BytecodeInterpreter::native_lresult_offset()); 174 address fresult = (address)istate + in_bytes(BytecodeInterpreter::native_fresult_offset()); 175 #else 176 address lresult = (address)&(get_ijava_state()->lresult); 177 address fresult = (address)&(get_ijava_state()->fresult); 178 #endif 179 180 switch (method->result_type()) { 181 case T_OBJECT: 182 case T_ARRAY: { 183 oop* obj_p = *(oop**)lresult; 184 oop obj = (obj_p == NULL) ? (oop)NULL : *obj_p; 185 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check"); 186 *oop_result = obj; 187 break; 188 } 189 // We use std/stfd to store the values. 190 case T_BOOLEAN : value_result->z = (jboolean) *(unsigned long*)lresult; break; 191 case T_INT : value_result->i = (jint) *(long*)lresult; break; 192 case T_CHAR : value_result->c = (jchar) *(unsigned long*)lresult; break; 193 case T_SHORT : value_result->s = (jshort) *(long*)lresult; break; 194 case T_BYTE : value_result->z = (jbyte) *(long*)lresult; break; 195 case T_LONG : value_result->j = (jlong) *(long*)lresult; break; 196 case T_FLOAT : value_result->f = (jfloat) *(double*)fresult; break; 197 case T_DOUBLE : value_result->d = (jdouble) *(double*)fresult; break; 198 case T_VOID : /* Nothing to do */ break; 199 default : ShouldNotReachHere(); 200 } 201 } else { 202 intptr_t* tos_addr = interpreter_frame_tos_address(); 203 switch (method->result_type()) { 204 case T_OBJECT: 205 case T_ARRAY: { 206 oop obj = *(oop*)tos_addr; 207 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check"); 208 *oop_result = obj; 209 } 210 case T_BOOLEAN : value_result->z = (jboolean) *(jint*)tos_addr; break; 211 case T_BYTE : value_result->b = (jbyte) *(jint*)tos_addr; break; 212 case T_CHAR : value_result->c = (jchar) *(jint*)tos_addr; break; 213 case T_SHORT : value_result->s = (jshort) *(jint*)tos_addr; break; 214 case T_INT : value_result->i = *(jint*)tos_addr; break; 215 case T_LONG : value_result->j = *(jlong*)tos_addr; break; 216 case T_FLOAT : value_result->f = *(jfloat*)tos_addr; break; 217 case T_DOUBLE : value_result->d = *(jdouble*)tos_addr; break; 218 case T_VOID : /* Nothing to do */ break; 219 default : ShouldNotReachHere(); 220 } 221 } 222 return type; 223 } 224 225 #ifndef PRODUCT 226 227 void frame::describe_pd(FrameValues& values, int frame_no) { 228 if (is_interpreted_frame()) { 229 #ifdef CC_INTERP 230 interpreterState istate = get_interpreterState(); 231 values.describe(frame_no, (intptr_t*)istate, "istate"); 232 values.describe(frame_no, (intptr_t*)&(istate->_thread), " thread"); 233 values.describe(frame_no, (intptr_t*)&(istate->_bcp), " bcp"); 234 values.describe(frame_no, (intptr_t*)&(istate->_locals), " locals"); 235 values.describe(frame_no, (intptr_t*)&(istate->_constants), " constants"); 236 values.describe(frame_no, (intptr_t*)&(istate->_method), err_msg(" method = %s", istate->_method->name_and_sig_as_C_string())); 237 values.describe(frame_no, (intptr_t*)&(istate->_mdx), " mdx"); 238 values.describe(frame_no, (intptr_t*)&(istate->_stack), " stack"); 239 values.describe(frame_no, (intptr_t*)&(istate->_msg), err_msg(" msg = %s", BytecodeInterpreter::C_msg(istate->_msg))); 240 values.describe(frame_no, (intptr_t*)&(istate->_result), " result"); 241 values.describe(frame_no, (intptr_t*)&(istate->_prev_link), " prev_link"); 242 values.describe(frame_no, (intptr_t*)&(istate->_oop_temp), " oop_temp"); 243 values.describe(frame_no, (intptr_t*)&(istate->_stack_base), " stack_base"); 244 values.describe(frame_no, (intptr_t*)&(istate->_stack_limit), " stack_limit"); 245 values.describe(frame_no, (intptr_t*)&(istate->_monitor_base), " monitor_base"); 246 values.describe(frame_no, (intptr_t*)&(istate->_frame_bottom), " frame_bottom"); 247 values.describe(frame_no, (intptr_t*)&(istate->_last_Java_pc), " last_Java_pc"); 248 values.describe(frame_no, (intptr_t*)&(istate->_last_Java_fp), " last_Java_fp"); 249 values.describe(frame_no, (intptr_t*)&(istate->_last_Java_sp), " last_Java_sp"); 250 values.describe(frame_no, (intptr_t*)&(istate->_self_link), " self_link"); 251 values.describe(frame_no, (intptr_t*)&(istate->_native_fresult), " native_fresult"); 252 values.describe(frame_no, (intptr_t*)&(istate->_native_lresult), " native_lresult"); 253 #else 254 #define DESCRIBE_ADDRESS(name) \ 255 values.describe(frame_no, (intptr_t*)&(get_ijava_state()->name), #name); 256 257 DESCRIBE_ADDRESS(method); 258 DESCRIBE_ADDRESS(locals); 259 DESCRIBE_ADDRESS(monitors); 260 DESCRIBE_ADDRESS(cpoolCache); 261 DESCRIBE_ADDRESS(bcp); 262 DESCRIBE_ADDRESS(esp); 263 DESCRIBE_ADDRESS(mdx); 264 DESCRIBE_ADDRESS(top_frame_sp); 265 DESCRIBE_ADDRESS(sender_sp); 266 DESCRIBE_ADDRESS(oop_tmp); 267 DESCRIBE_ADDRESS(lresult); 268 DESCRIBE_ADDRESS(fresult); 269 #endif 270 } 271 } 272 #endif 273 274 void frame::adjust_unextended_sp() { 275 // If we are returning to a compiled MethodHandle call site, the 276 // saved_fp will in fact be a saved value of the unextended SP. The 277 // simplest way to tell whether we are returning to such a call site 278 // is as follows: 279 280 if (is_compiled_frame() && false /*is_at_mh_callsite()*/) { // TODO PPC port 281 // If the sender PC is a deoptimization point, get the original 282 // PC. For MethodHandle call site the unextended_sp is stored in 283 // saved_fp. 284 _unextended_sp = _fp - _cb->frame_size(); 285 286 #ifdef ASSERT 287 nmethod *sender_nm = _cb->as_nmethod_or_null(); 288 assert(sender_nm && *_sp == *_unextended_sp, "backlink changed"); 289 290 intptr_t* sp = _unextended_sp; // check if stack can be walked from here 291 for (int x = 0; x < 5; ++x) { // check up to a couple of backlinks 292 intptr_t* prev_sp = *(intptr_t**)sp; 293 if (prev_sp == 0) break; // end of stack 294 assert(prev_sp>sp, "broken stack"); 295 sp = prev_sp; 296 } 297 298 if (sender_nm->is_deopt_mh_entry(_pc)) { // checks for deoptimization 299 address original_pc = sender_nm->get_original_pc(this); 300 assert(sender_nm->insts_contains(original_pc), "original PC must be in nmethod"); 301 assert(sender_nm->is_method_handle_return(original_pc), "must be"); 302 } 303 #endif 304 } 305 } 306 307 intptr_t *frame::initial_deoptimization_info() { 308 // unused... but returns fp() to minimize changes introduced by 7087445 309 return fp(); 310 }