frame_ppc.cpp revision 6760:22b98ab2a69f 
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
45void RegisterMap::check_location_valid() {
46}
47#endif // ASSERT
48
49bool 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
61bool frame::is_interpreted_frame() const  {
62  return Interpreter::contains(pc());
63}
64
65frame 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
85frame 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
93frame 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
114intptr_t* frame::compiled_sender_sp(CodeBlob* cb) const {
115  return sender_sp();
116}
117
118address* frame::compiled_sender_pc_addr(CodeBlob* cb) const {
119  return sender_pc_addr();
120}
121
122frame 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
139void 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
157void frame::pd_gc_epilog() {
158  if (is_interpreted_frame()) {
159    // Set constant pool cache entry for interpreter.
160    Method* m = interpreter_frame_method();
161
162    *interpreter_frame_cpoolcache_addr() = m->constants()->cache();
163  }
164}
165
166bool frame::is_interpreted_frame_valid(JavaThread* thread) const {
167  // Is there anything to do?
168  assert(is_interpreted_frame(), "Not an interpreted frame");
169  return true;
170}
171
172BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) {
173  assert(is_interpreted_frame(), "interpreted frame expected");
174  Method* method = interpreter_frame_method();
175  BasicType type = method->result_type();
176
177  if (method->is_native()) {
178    // Prior to calling into the runtime to notify the method exit the possible
179    // result value is saved into the interpreter frame.
180#ifdef CC_INTERP
181    interpreterState istate = get_interpreterState();
182    address lresult = (address)istate + in_bytes(BytecodeInterpreter::native_lresult_offset());
183    address fresult = (address)istate + in_bytes(BytecodeInterpreter::native_fresult_offset());
184#else
185    address lresult = (address)&(get_ijava_state()->lresult);
186    address fresult = (address)&(get_ijava_state()->fresult);
187#endif
188
189    switch (method->result_type()) {
190      case T_OBJECT:
191      case T_ARRAY: {
192        oop* obj_p = *(oop**)lresult;
193        oop obj = (obj_p == NULL) ? (oop)NULL : *obj_p;
194        assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check");
195        *oop_result = obj;
196        break;
197      }
198      // We use std/stfd to store the values.
199      case T_BOOLEAN : value_result->z = (jboolean) *(unsigned long*)lresult; break;
200      case T_INT     : value_result->i = (jint)     *(long*)lresult;          break;
201      case T_CHAR    : value_result->c = (jchar)    *(unsigned long*)lresult; break;
202      case T_SHORT   : value_result->s = (jshort)   *(long*)lresult;          break;
203      case T_BYTE    : value_result->z = (jbyte)    *(long*)lresult;          break;
204      case T_LONG    : value_result->j = (jlong)    *(long*)lresult;          break;
205      case T_FLOAT   : value_result->f = (jfloat)   *(double*)fresult;        break;
206      case T_DOUBLE  : value_result->d = (jdouble)  *(double*)fresult;        break;
207      case T_VOID    : /* Nothing to do */ break;
208      default        : ShouldNotReachHere();
209    }
210  } else {
211    intptr_t* tos_addr = interpreter_frame_tos_address();
212    switch (method->result_type()) {
213      case T_OBJECT:
214      case T_ARRAY: {
215        oop obj = *(oop*)tos_addr;
216        assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check");
217        *oop_result = obj;
218      }
219      case T_BOOLEAN : value_result->z = (jboolean) *(jint*)tos_addr; break;
220      case T_BYTE    : value_result->b = (jbyte) *(jint*)tos_addr; break;
221      case T_CHAR    : value_result->c = (jchar) *(jint*)tos_addr; break;
222      case T_SHORT   : value_result->s = (jshort) *(jint*)tos_addr; break;
223      case T_INT     : value_result->i = *(jint*)tos_addr; break;
224      case T_LONG    : value_result->j = *(jlong*)tos_addr; break;
225      case T_FLOAT   : value_result->f = *(jfloat*)tos_addr; break;
226      case T_DOUBLE  : value_result->d = *(jdouble*)tos_addr; break;
227      case T_VOID    : /* Nothing to do */ break;
228      default        : ShouldNotReachHere();
229    }
230  }
231  return type;
232}
233
234#ifndef PRODUCT
235
236void frame::describe_pd(FrameValues& values, int frame_no) {
237  if (is_interpreted_frame()) {
238#ifdef CC_INTERP
239    interpreterState istate = get_interpreterState();
240    values.describe(frame_no, (intptr_t*)istate, "istate");
241    values.describe(frame_no, (intptr_t*)&(istate->_thread), " thread");
242    values.describe(frame_no, (intptr_t*)&(istate->_bcp), " bcp");
243    values.describe(frame_no, (intptr_t*)&(istate->_locals), " locals");
244    values.describe(frame_no, (intptr_t*)&(istate->_constants), " constants");
245    values.describe(frame_no, (intptr_t*)&(istate->_method), err_msg(" method = %s", istate->_method->name_and_sig_as_C_string()));
246    values.describe(frame_no, (intptr_t*)&(istate->_mdx), " mdx");
247    values.describe(frame_no, (intptr_t*)&(istate->_stack), " stack");
248    values.describe(frame_no, (intptr_t*)&(istate->_msg), err_msg(" msg = %s", BytecodeInterpreter::C_msg(istate->_msg)));
249    values.describe(frame_no, (intptr_t*)&(istate->_result), " result");
250    values.describe(frame_no, (intptr_t*)&(istate->_prev_link), " prev_link");
251    values.describe(frame_no, (intptr_t*)&(istate->_oop_temp), " oop_temp");
252    values.describe(frame_no, (intptr_t*)&(istate->_stack_base), " stack_base");
253    values.describe(frame_no, (intptr_t*)&(istate->_stack_limit), " stack_limit");
254    values.describe(frame_no, (intptr_t*)&(istate->_monitor_base), " monitor_base");
255    values.describe(frame_no, (intptr_t*)&(istate->_frame_bottom), " frame_bottom");
256    values.describe(frame_no, (intptr_t*)&(istate->_last_Java_pc), " last_Java_pc");
257    values.describe(frame_no, (intptr_t*)&(istate->_last_Java_fp), " last_Java_fp");
258    values.describe(frame_no, (intptr_t*)&(istate->_last_Java_sp), " last_Java_sp");
259    values.describe(frame_no, (intptr_t*)&(istate->_self_link), " self_link");
260    values.describe(frame_no, (intptr_t*)&(istate->_native_fresult), " native_fresult");
261    values.describe(frame_no, (intptr_t*)&(istate->_native_lresult), " native_lresult");
262#else
263#define DESCRIBE_ADDRESS(name) \
264  values.describe(frame_no, (intptr_t*)&(get_ijava_state()->name), #name);
265
266      DESCRIBE_ADDRESS(method);
267      DESCRIBE_ADDRESS(locals);
268      DESCRIBE_ADDRESS(monitors);
269      DESCRIBE_ADDRESS(cpoolCache);
270      DESCRIBE_ADDRESS(bcp);
271      DESCRIBE_ADDRESS(esp);
272      DESCRIBE_ADDRESS(mdx);
273      DESCRIBE_ADDRESS(top_frame_sp);
274      DESCRIBE_ADDRESS(sender_sp);
275      DESCRIBE_ADDRESS(oop_tmp);
276      DESCRIBE_ADDRESS(lresult);
277      DESCRIBE_ADDRESS(fresult);
278#endif
279  }
280}
281#endif
282
283void frame::adjust_unextended_sp() {
284  // If we are returning to a compiled MethodHandle call site, the
285  // saved_fp will in fact be a saved value of the unextended SP. The
286  // simplest way to tell whether we are returning to such a call site
287  // is as follows:
288
289  if (is_compiled_frame() && false /*is_at_mh_callsite()*/) {  // TODO PPC port
290    // If the sender PC is a deoptimization point, get the original
291    // PC. For MethodHandle call site the unextended_sp is stored in
292    // saved_fp.
293    _unextended_sp = _fp - _cb->frame_size();
294
295#ifdef ASSERT
296    nmethod *sender_nm = _cb->as_nmethod_or_null();
297    assert(sender_nm && *_sp == *_unextended_sp, "backlink changed");
298
299    intptr_t* sp = _unextended_sp;  // check if stack can be walked from here
300    for (int x = 0; x < 5; ++x) {   // check up to a couple of backlinks
301      intptr_t* prev_sp = *(intptr_t**)sp;
302      if (prev_sp == 0) break;      // end of stack
303      assert(prev_sp>sp, "broken stack");
304      sp = prev_sp;
305    }
306
307    if (sender_nm->is_deopt_mh_entry(_pc)) { // checks for deoptimization
308      address original_pc = sender_nm->get_original_pc(this);
309      assert(sender_nm->insts_contains(original_pc), "original PC must be in nmethod");
310      assert(sender_nm->is_method_handle_return(original_pc), "must be");
311    }
312#endif
313  }
314}
315
316intptr_t *frame::initial_deoptimization_info() {
317  // unused... but returns fp() to minimize changes introduced by 7087445
318  return fp();
319}
320