frame_zero.cpp revision 5776:de6a9e811145 
1/*
2 * Copyright (c) 2003, 2013, 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
122void frame::pd_gc_epilog() {
123}
124
125bool frame::is_interpreted_frame_valid(JavaThread *thread) const {
126  ShouldNotCallThis();
127  return false;
128}
129
130BasicType frame::interpreter_frame_result(oop* oop_result,
131                                          jvalue* value_result) {
132  assert(is_interpreted_frame(), "interpreted frame expected");
133  Method* method = interpreter_frame_method();
134  BasicType type = method->result_type();
135  intptr_t* tos_addr = (intptr_t *) interpreter_frame_tos_address();
136  oop obj;
137
138  switch (type) {
139  case T_VOID:
140    break;
141  case T_BOOLEAN:
142    value_result->z = *(jboolean *) tos_addr;
143    break;
144  case T_BYTE:
145    value_result->b = *(jbyte *) tos_addr;
146    break;
147  case T_CHAR:
148    value_result->c = *(jchar *) tos_addr;
149    break;
150  case T_SHORT:
151    value_result->s = *(jshort *) tos_addr;
152    break;
153  case T_INT:
154    value_result->i = *(jint *) tos_addr;
155    break;
156  case T_LONG:
157    value_result->j = *(jlong *) tos_addr;
158    break;
159  case T_FLOAT:
160    value_result->f = *(jfloat *) tos_addr;
161    break;
162  case T_DOUBLE:
163    value_result->d = *(jdouble *) tos_addr;
164    break;
165
166  case T_OBJECT:
167  case T_ARRAY:
168    if (method->is_native()) {
169      obj = get_interpreterState()->oop_temp();
170    }
171    else {
172      oop* obj_p = (oop *) tos_addr;
173      obj = (obj_p == NULL) ? (oop) NULL : *obj_p;
174    }
175    assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check");
176    *oop_result = obj;
177    break;
178
179  default:
180    ShouldNotReachHere();
181  }
182
183  return type;
184}
185
186int frame::frame_size(RegisterMap* map) const {
187#ifdef PRODUCT
188  ShouldNotCallThis();
189#endif // PRODUCT
190  return 0; // make javaVFrame::print_value work
191}
192
193intptr_t* frame::interpreter_frame_tos_at(jint offset) const {
194  int index = (Interpreter::expr_offset_in_bytes(offset) / wordSize);
195  return &interpreter_frame_tos_address()[index];
196}
197
198void frame::zero_print_on_error(int           frame_index,
199                                outputStream* st,
200                                char*         buf,
201                                int           buflen) const {
202  // Divide the buffer between the field and the value
203  buflen >>= 1;
204  char *fieldbuf = buf;
205  char *valuebuf = buf + buflen;
206
207  // Print each word of the frame
208  for (intptr_t *addr = sp(); addr <= fp(); addr++) {
209    int offset = fp() - addr;
210
211    // Fill in default values, then try and improve them
212    snprintf(fieldbuf, buflen, "word[%d]", offset);
213    snprintf(valuebuf, buflen, PTR_FORMAT, *addr);
214    zeroframe()->identify_word(frame_index, offset, fieldbuf, valuebuf, buflen);
215    fieldbuf[buflen - 1] = '\0';
216    valuebuf[buflen - 1] = '\0';
217
218    // Print the result
219    st->print_cr(" " PTR_FORMAT ": %-21s = %s", addr, fieldbuf, valuebuf);
220  }
221}
222
223void ZeroFrame::identify_word(int   frame_index,
224                              int   offset,
225                              char* fieldbuf,
226                              char* valuebuf,
227                              int   buflen) const {
228  switch (offset) {
229  case next_frame_off:
230    strncpy(fieldbuf, "next_frame", buflen);
231    break;
232
233  case frame_type_off:
234    strncpy(fieldbuf, "frame_type", buflen);
235    if (is_entry_frame())
236      strncpy(valuebuf, "ENTRY_FRAME", buflen);
237    else if (is_interpreter_frame())
238      strncpy(valuebuf, "INTERPRETER_FRAME", buflen);
239    else if (is_shark_frame())
240      strncpy(valuebuf, "SHARK_FRAME", buflen);
241    else if (is_fake_stub_frame())
242      strncpy(valuebuf, "FAKE_STUB_FRAME", buflen);
243    break;
244
245  default:
246    if (is_entry_frame()) {
247      as_entry_frame()->identify_word(
248        frame_index, offset, fieldbuf, valuebuf, buflen);
249    }
250    else if (is_interpreter_frame()) {
251      as_interpreter_frame()->identify_word(
252        frame_index, offset, fieldbuf, valuebuf, buflen);
253    }
254    else if (is_shark_frame()) {
255      as_shark_frame()->identify_word(
256        frame_index, offset, fieldbuf, valuebuf, buflen);
257    }
258    else if (is_fake_stub_frame()) {
259      as_fake_stub_frame()->identify_word(
260        frame_index, offset, fieldbuf, valuebuf, buflen);
261    }
262  }
263}
264
265void EntryFrame::identify_word(int   frame_index,
266                               int   offset,
267                               char* fieldbuf,
268                               char* valuebuf,
269                               int   buflen) const {
270  switch (offset) {
271  case call_wrapper_off:
272    strncpy(fieldbuf, "call_wrapper", buflen);
273    break;
274
275  default:
276    snprintf(fieldbuf, buflen, "local[%d]", offset - 3);
277  }
278}
279
280void InterpreterFrame::identify_word(int   frame_index,
281                                     int   offset,
282                                     char* fieldbuf,
283                                     char* valuebuf,
284                                     int   buflen) const {
285  interpreterState istate = interpreter_state();
286  bool is_valid = istate->self_link() == istate;
287  intptr_t *addr = addr_of_word(offset);
288
289  // Fixed part
290  if (addr >= (intptr_t *) istate) {
291    const char *field = istate->name_of_field_at_address((address) addr);
292    if (field) {
293      if (is_valid && !strcmp(field, "_method")) {
294        istate->method()->name_and_sig_as_C_string(valuebuf, buflen);
295      }
296      else if (is_valid && !strcmp(field, "_bcp") && istate->bcp()) {
297        snprintf(valuebuf, buflen, PTR_FORMAT " (bci %d)",
298                 (intptr_t) istate->bcp(),
299                 istate->method()->bci_from(istate->bcp()));
300      }
301      snprintf(fieldbuf, buflen, "%sistate->%s",
302               field[strlen(field) - 1] == ')' ? "(": "", field);
303    }
304    else if (addr == (intptr_t *) istate) {
305      strncpy(fieldbuf, "(vtable for istate)", buflen);
306    }
307    return;
308  }
309
310  // Variable part
311  if (!is_valid)
312    return;
313
314  // JNI stuff
315  if (istate->method()->is_native() && addr < istate->stack_base()) {
316    address hA = istate->method()->signature_handler();
317    if (hA != NULL) {
318      if (hA != (address) InterpreterRuntime::slow_signature_handler) {
319        InterpreterRuntime::SignatureHandler *handler =
320          InterpreterRuntime::SignatureHandler::from_handlerAddr(hA);
321
322        intptr_t *params = istate->stack_base() - handler->argument_count();
323        if (addr >= params) {
324          int param = addr - params;
325          const char *desc = "";
326          if (param == 0)
327            desc = " (JNIEnv)";
328          else if (param == 1) {
329            if (istate->method()->is_static())
330              desc = " (mirror)";
331            else
332              desc = " (this)";
333          }
334          snprintf(fieldbuf, buflen, "parameter[%d]%s", param, desc);
335          return;
336        }
337
338        for (int i = 0; i < handler->argument_count(); i++) {
339          if (params[i] == (intptr_t) addr) {
340            snprintf(fieldbuf, buflen, "unboxed parameter[%d]", i);
341            return;
342          }
343        }
344      }
345    }
346    return;
347  }
348
349  // Monitors and stack
350  identify_vp_word(frame_index, addr,
351                   (intptr_t *) istate->monitor_base(),
352                   istate->stack_base(),
353                   fieldbuf, buflen);
354}
355
356void SharkFrame::identify_word(int   frame_index,
357                               int   offset,
358                               char* fieldbuf,
359                               char* valuebuf,
360                               int   buflen) const {
361  // Fixed part
362  switch (offset) {
363  case pc_off:
364    strncpy(fieldbuf, "pc", buflen);
365    if (method()->is_method()) {
366      nmethod *code = method()->code();
367      if (code && code->pc_desc_at(pc())) {
368        SimpleScopeDesc ssd(code, pc());
369        snprintf(valuebuf, buflen, PTR_FORMAT " (bci %d)",
370                 (intptr_t) pc(), ssd.bci());
371      }
372    }
373    return;
374
375  case unextended_sp_off:
376    strncpy(fieldbuf, "unextended_sp", buflen);
377    return;
378
379  case method_off:
380    strncpy(fieldbuf, "method", buflen);
381    if (method()->is_method()) {
382      method()->name_and_sig_as_C_string(valuebuf, buflen);
383    }
384    return;
385
386  case oop_tmp_off:
387    strncpy(fieldbuf, "oop_tmp", buflen);
388    return;
389  }
390
391  // Variable part
392  if (method()->is_method()) {
393    identify_vp_word(frame_index, addr_of_word(offset),
394                     addr_of_word(header_words + 1),
395                     unextended_sp() + method()->max_stack(),
396                     fieldbuf, buflen);
397  }
398}
399
400void ZeroFrame::identify_vp_word(int       frame_index,
401                                 intptr_t* addr,
402                                 intptr_t* monitor_base,
403                                 intptr_t* stack_base,
404                                 char*     fieldbuf,
405                                 int       buflen) const {
406  // Monitors
407  if (addr >= stack_base && addr < monitor_base) {
408    int monitor_size = frame::interpreter_frame_monitor_size();
409    int last_index = (monitor_base - stack_base) / monitor_size - 1;
410    int index = last_index - (addr - stack_base) / monitor_size;
411    intptr_t monitor = (intptr_t) (
412      (BasicObjectLock *) monitor_base - 1 - index);
413    intptr_t offset = (intptr_t) addr - monitor;
414
415    if (offset == BasicObjectLock::obj_offset_in_bytes())
416      snprintf(fieldbuf, buflen, "monitor[%d]->_obj", index);
417    else if (offset ==  BasicObjectLock::lock_offset_in_bytes())
418      snprintf(fieldbuf, buflen, "monitor[%d]->_lock", index);
419
420    return;
421  }
422
423  // Expression stack
424  if (addr < stack_base) {
425    snprintf(fieldbuf, buflen, "%s[%d]",
426             frame_index == 0 ? "stack_word" : "local",
427             (int) (stack_base - addr - 1));
428    return;
429  }
430}
431
432#ifndef PRODUCT
433
434void frame::describe_pd(FrameValues& values, int frame_no) {
435
436}
437
438#endif
439
440intptr_t *frame::initial_deoptimization_info() {
441  // unused... but returns fp() to minimize changes introduced by 7087445
442  return fp();
443}
444