frame_zero.cpp revision 6759:ecdcd96f051a 
1/*
2 * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2007, 2008, 2009, 2010, 2011 Red Hat, Inc.
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 "code/scopeDesc.hpp"
28#include "interpreter/interpreter.hpp"
29#include "interpreter/interpreterRuntime.hpp"
30#include "memory/resourceArea.hpp"
31#include "oops/markOop.hpp"
32#include "oops/method.hpp"
33#include "oops/oop.inline.hpp"
34#include "runtime/frame.inline.hpp"
35#include "runtime/handles.inline.hpp"
36#include "runtime/javaCalls.hpp"
37#include "runtime/monitorChunk.hpp"
38#include "runtime/signature.hpp"
39#include "runtime/stubCodeGenerator.hpp"
40#include "runtime/stubRoutines.hpp"
41#include "vmreg_zero.inline.hpp"
42#ifdef COMPILER1
43#include "c1/c1_Runtime1.hpp"
44#include "runtime/vframeArray.hpp"
45#endif
46
47#ifdef ASSERT
48void RegisterMap::check_location_valid() {
49  ShouldNotCallThis();
50}
51#endif
52
53bool frame::is_interpreted_frame() const {
54  return zeroframe()->is_interpreter_frame();
55}
56
57bool frame::is_fake_stub_frame() const {
58  return zeroframe()->is_fake_stub_frame();
59}
60
61frame frame::sender_for_entry_frame(RegisterMap *map) const {
62  assert(zeroframe()->is_entry_frame(), "wrong type of frame");
63  assert(map != NULL, "map must be set");
64  assert(!entry_frame_is_first(), "next Java fp must be non zero");
65  assert(entry_frame_call_wrapper()->anchor()->last_Java_sp() == sender_sp(),
66         "sender should be next Java frame");
67  map->clear();
68  assert(map->include_argument_oops(), "should be set by clear");
69  return frame(zeroframe()->next(), sender_sp());
70}
71
72frame frame::sender_for_nonentry_frame(RegisterMap *map) const {
73  assert(zeroframe()->is_interpreter_frame() ||
74         zeroframe()->is_shark_frame() ||
75         zeroframe()->is_fake_stub_frame(), "wrong type of frame");
76  return frame(zeroframe()->next(), sender_sp());
77}
78
79frame frame::sender(RegisterMap* map) const {
80  // Default is not to follow arguments; the various
81  // sender_for_xxx methods update this accordingly.
82  map->set_include_argument_oops(false);
83
84  if (is_entry_frame())
85    return sender_for_entry_frame(map);
86  else
87    return sender_for_nonentry_frame(map);
88}
89
90#ifdef CC_INTERP
91BasicObjectLock* frame::interpreter_frame_monitor_begin() const {
92  return get_interpreterState()->monitor_base();
93}
94
95BasicObjectLock* frame::interpreter_frame_monitor_end() const {
96  return (BasicObjectLock*) get_interpreterState()->stack_base();
97}
98#endif // CC_INTERP
99
100void frame::patch_pc(Thread* thread, address pc) {
101
102  if (pc != NULL) {
103    _cb = CodeCache::find_blob(pc);
104    SharkFrame* sharkframe = zeroframe()->as_shark_frame();
105    sharkframe->set_pc(pc);
106    _pc = pc;
107    _deopt_state = is_deoptimized;
108
109  } else {
110    // We borrow this call to set the thread pointer in the interpreter
111    // state; the hook to set up deoptimized frames isn't supplied it.
112    assert(pc == NULL, "should be");
113    get_interpreterState()->set_thread((JavaThread *) thread);
114  }
115}
116
117bool frame::safe_for_sender(JavaThread *thread) {
118  ShouldNotCallThis();
119  return false;
120}
121
122bool frame::is_interpreted_frame_valid(JavaThread *thread) const {
123  ShouldNotCallThis();
124  return false;
125}
126
127BasicType frame::interpreter_frame_result(oop* oop_result,
128                                          jvalue* value_result) {
129  assert(is_interpreted_frame(), "interpreted frame expected");
130  Method* method = interpreter_frame_method();
131  BasicType type = method->result_type();
132  intptr_t* tos_addr = (intptr_t *) interpreter_frame_tos_address();
133  oop obj;
134
135  switch (type) {
136  case T_VOID:
137    break;
138  case T_BOOLEAN:
139    value_result->z = *(jboolean *) tos_addr;
140    break;
141  case T_BYTE:
142    value_result->b = *(jbyte *) tos_addr;
143    break;
144  case T_CHAR:
145    value_result->c = *(jchar *) tos_addr;
146    break;
147  case T_SHORT:
148    value_result->s = *(jshort *) tos_addr;
149    break;
150  case T_INT:
151    value_result->i = *(jint *) tos_addr;
152    break;
153  case T_LONG:
154    value_result->j = *(jlong *) tos_addr;
155    break;
156  case T_FLOAT:
157    value_result->f = *(jfloat *) tos_addr;
158    break;
159  case T_DOUBLE:
160    value_result->d = *(jdouble *) tos_addr;
161    break;
162
163  case T_OBJECT:
164  case T_ARRAY:
165    if (method->is_native()) {
166      obj = get_interpreterState()->oop_temp();
167    }
168    else {
169      oop* obj_p = (oop *) tos_addr;
170      obj = (obj_p == NULL) ? (oop) NULL : *obj_p;
171    }
172    assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check");
173    *oop_result = obj;
174    break;
175
176  default:
177    ShouldNotReachHere();
178  }
179
180  return type;
181}
182
183int frame::frame_size(RegisterMap* map) const {
184#ifdef PRODUCT
185  ShouldNotCallThis();
186#endif // PRODUCT
187  return 0; // make javaVFrame::print_value work
188}
189
190intptr_t* frame::interpreter_frame_tos_at(jint offset) const {
191  int index = (Interpreter::expr_offset_in_bytes(offset) / wordSize);
192  return &interpreter_frame_tos_address()[index];
193}
194
195void frame::zero_print_on_error(int           frame_index,
196                                outputStream* st,
197                                char*         buf,
198                                int           buflen) const {
199  // Divide the buffer between the field and the value
200  buflen >>= 1;
201  char *fieldbuf = buf;
202  char *valuebuf = buf + buflen;
203
204  // Print each word of the frame
205  for (intptr_t *addr = sp(); addr <= fp(); addr++) {
206    int offset = fp() - addr;
207
208    // Fill in default values, then try and improve them
209    snprintf(fieldbuf, buflen, "word[%d]", offset);
210    snprintf(valuebuf, buflen, PTR_FORMAT, *addr);
211    zeroframe()->identify_word(frame_index, offset, fieldbuf, valuebuf, buflen);
212    fieldbuf[buflen - 1] = '\0';
213    valuebuf[buflen - 1] = '\0';
214
215    // Print the result
216    st->print_cr(" " PTR_FORMAT ": %-21s = %s", addr, fieldbuf, valuebuf);
217  }
218}
219
220void ZeroFrame::identify_word(int   frame_index,
221                              int   offset,
222                              char* fieldbuf,
223                              char* valuebuf,
224                              int   buflen) const {
225  switch (offset) {
226  case next_frame_off:
227    strncpy(fieldbuf, "next_frame", buflen);
228    break;
229
230  case frame_type_off:
231    strncpy(fieldbuf, "frame_type", buflen);
232    if (is_entry_frame())
233      strncpy(valuebuf, "ENTRY_FRAME", buflen);
234    else if (is_interpreter_frame())
235      strncpy(valuebuf, "INTERPRETER_FRAME", buflen);
236    else if (is_shark_frame())
237      strncpy(valuebuf, "SHARK_FRAME", buflen);
238    else if (is_fake_stub_frame())
239      strncpy(valuebuf, "FAKE_STUB_FRAME", buflen);
240    break;
241
242  default:
243    if (is_entry_frame()) {
244      as_entry_frame()->identify_word(
245        frame_index, offset, fieldbuf, valuebuf, buflen);
246    }
247    else if (is_interpreter_frame()) {
248      as_interpreter_frame()->identify_word(
249        frame_index, offset, fieldbuf, valuebuf, buflen);
250    }
251    else if (is_shark_frame()) {
252      as_shark_frame()->identify_word(
253        frame_index, offset, fieldbuf, valuebuf, buflen);
254    }
255    else if (is_fake_stub_frame()) {
256      as_fake_stub_frame()->identify_word(
257        frame_index, offset, fieldbuf, valuebuf, buflen);
258    }
259  }
260}
261
262void EntryFrame::identify_word(int   frame_index,
263                               int   offset,
264                               char* fieldbuf,
265                               char* valuebuf,
266                               int   buflen) const {
267  switch (offset) {
268  case call_wrapper_off:
269    strncpy(fieldbuf, "call_wrapper", buflen);
270    break;
271
272  default:
273    snprintf(fieldbuf, buflen, "local[%d]", offset - 3);
274  }
275}
276
277void InterpreterFrame::identify_word(int   frame_index,
278                                     int   offset,
279                                     char* fieldbuf,
280                                     char* valuebuf,
281                                     int   buflen) const {
282  interpreterState istate = interpreter_state();
283  bool is_valid = istate->self_link() == istate;
284  intptr_t *addr = addr_of_word(offset);
285
286  // Fixed part
287  if (addr >= (intptr_t *) istate) {
288    const char *field = istate->name_of_field_at_address((address) addr);
289    if (field) {
290      if (is_valid && !strcmp(field, "_method")) {
291        istate->method()->name_and_sig_as_C_string(valuebuf, buflen);
292      }
293      else if (is_valid && !strcmp(field, "_bcp") && istate->bcp()) {
294        snprintf(valuebuf, buflen, PTR_FORMAT " (bci %d)",
295                 (intptr_t) istate->bcp(),
296                 istate->method()->bci_from(istate->bcp()));
297      }
298      snprintf(fieldbuf, buflen, "%sistate->%s",
299               field[strlen(field) - 1] == ')' ? "(": "", field);
300    }
301    else if (addr == (intptr_t *) istate) {
302      strncpy(fieldbuf, "(vtable for istate)", buflen);
303    }
304    return;
305  }
306
307  // Variable part
308  if (!is_valid)
309    return;
310
311  // JNI stuff
312  if (istate->method()->is_native() && addr < istate->stack_base()) {
313    address hA = istate->method()->signature_handler();
314    if (hA != NULL) {
315      if (hA != (address) InterpreterRuntime::slow_signature_handler) {
316        InterpreterRuntime::SignatureHandler *handler =
317          InterpreterRuntime::SignatureHandler::from_handlerAddr(hA);
318
319        intptr_t *params = istate->stack_base() - handler->argument_count();
320        if (addr >= params) {
321          int param = addr - params;
322          const char *desc = "";
323          if (param == 0)
324            desc = " (JNIEnv)";
325          else if (param == 1) {
326            if (istate->method()->is_static())
327              desc = " (mirror)";
328            else
329              desc = " (this)";
330          }
331          snprintf(fieldbuf, buflen, "parameter[%d]%s", param, desc);
332          return;
333        }
334
335        for (int i = 0; i < handler->argument_count(); i++) {
336          if (params[i] == (intptr_t) addr) {
337            snprintf(fieldbuf, buflen, "unboxed parameter[%d]", i);
338            return;
339          }
340        }
341      }
342    }
343    return;
344  }
345
346  // Monitors and stack
347  identify_vp_word(frame_index, addr,
348                   (intptr_t *) istate->monitor_base(),
349                   istate->stack_base(),
350                   fieldbuf, buflen);
351}
352
353void SharkFrame::identify_word(int   frame_index,
354                               int   offset,
355                               char* fieldbuf,
356                               char* valuebuf,
357                               int   buflen) const {
358  // Fixed part
359  switch (offset) {
360  case pc_off:
361    strncpy(fieldbuf, "pc", buflen);
362    if (method()->is_method()) {
363      nmethod *code = method()->code();
364      if (code && code->pc_desc_at(pc())) {
365        SimpleScopeDesc ssd(code, pc());
366        snprintf(valuebuf, buflen, PTR_FORMAT " (bci %d)",
367                 (intptr_t) pc(), ssd.bci());
368      }
369    }
370    return;
371
372  case unextended_sp_off:
373    strncpy(fieldbuf, "unextended_sp", buflen);
374    return;
375
376  case method_off:
377    strncpy(fieldbuf, "method", buflen);
378    if (method()->is_method()) {
379      method()->name_and_sig_as_C_string(valuebuf, buflen);
380    }
381    return;
382
383  case oop_tmp_off:
384    strncpy(fieldbuf, "oop_tmp", buflen);
385    return;
386  }
387
388  // Variable part
389  if (method()->is_method()) {
390    identify_vp_word(frame_index, addr_of_word(offset),
391                     addr_of_word(header_words + 1),
392                     unextended_sp() + method()->max_stack(),
393                     fieldbuf, buflen);
394  }
395}
396
397void ZeroFrame::identify_vp_word(int       frame_index,
398                                 intptr_t* addr,
399                                 intptr_t* monitor_base,
400                                 intptr_t* stack_base,
401                                 char*     fieldbuf,
402                                 int       buflen) const {
403  // Monitors
404  if (addr >= stack_base && addr < monitor_base) {
405    int monitor_size = frame::interpreter_frame_monitor_size();
406    int last_index = (monitor_base - stack_base) / monitor_size - 1;
407    int index = last_index - (addr - stack_base) / monitor_size;
408    intptr_t monitor = (intptr_t) (
409      (BasicObjectLock *) monitor_base - 1 - index);
410    intptr_t offset = (intptr_t) addr - monitor;
411
412    if (offset == BasicObjectLock::obj_offset_in_bytes())
413      snprintf(fieldbuf, buflen, "monitor[%d]->_obj", index);
414    else if (offset ==  BasicObjectLock::lock_offset_in_bytes())
415      snprintf(fieldbuf, buflen, "monitor[%d]->_lock", index);
416
417    return;
418  }
419
420  // Expression stack
421  if (addr < stack_base) {
422    snprintf(fieldbuf, buflen, "%s[%d]",
423             frame_index == 0 ? "stack_word" : "local",
424             (int) (stack_base - addr - 1));
425    return;
426  }
427}
428
429#ifndef PRODUCT
430
431void frame::describe_pd(FrameValues& values, int frame_no) {
432
433}
434
435#endif
436
437intptr_t *frame::initial_deoptimization_info() {
438  // unused... but returns fp() to minimize changes introduced by 7087445
439  return fp();
440}
441