hotspot/src/share/vm/prims/forte.cpp
author stefank
Tue, 23 Nov 2010 13:22:55 -0800
changeset 7397 5b173b4ca846
parent 5547 f4b087cbb361
child 8106 19106a0203fb
permissions -rw-r--r--
6989984: Use standard include model for Hospot Summary: Replaced MakeDeps and the includeDB files with more standardized solutions. Reviewed-by: coleenp, kvn, kamg
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
     1
/*
7397
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5547
diff changeset
     2
 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
     3
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
489c9b5090e2 Initial load
duke
parents:
diff changeset
     4
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
     5
 * This code is free software; you can redistribute it and/or modify it
489c9b5090e2 Initial load
duke
parents:
diff changeset
     6
 * under the terms of the GNU General Public License version 2 only, as
489c9b5090e2 Initial load
duke
parents:
diff changeset
     7
 * published by the Free Software Foundation.
489c9b5090e2 Initial load
duke
parents:
diff changeset
     8
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
     9
 * This code is distributed in the hope that it will be useful, but WITHOUT
489c9b5090e2 Initial load
duke
parents:
diff changeset
    10
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
489c9b5090e2 Initial load
duke
parents:
diff changeset
    11
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
489c9b5090e2 Initial load
duke
parents:
diff changeset
    12
 * version 2 for more details (a copy is included in the LICENSE file that
489c9b5090e2 Initial load
duke
parents:
diff changeset
    13
 * accompanied this code).
489c9b5090e2 Initial load
duke
parents:
diff changeset
    14
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    15
 * You should have received a copy of the GNU General Public License version
489c9b5090e2 Initial load
duke
parents:
diff changeset
    16
 * 2 along with this work; if not, write to the Free Software Foundation,
489c9b5090e2 Initial load
duke
parents:
diff changeset
    17
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    18
 *
5547
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 5402
diff changeset
    19
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 5402
diff changeset
    20
 * or visit www.oracle.com if you need additional information or have any
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 5402
diff changeset
    21
 * questions.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    22
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    23
 */
489c9b5090e2 Initial load
duke
parents:
diff changeset
    24
7397
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5547
diff changeset
    25
#include "precompiled.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5547
diff changeset
    26
#include "code/debugInfoRec.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5547
diff changeset
    27
#include "code/pcDesc.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5547
diff changeset
    28
#include "gc_interface/collectedHeap.inline.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5547
diff changeset
    29
#include "memory/space.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5547
diff changeset
    30
#include "memory/universe.inline.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5547
diff changeset
    31
#include "oops/oop.inline.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5547
diff changeset
    32
#include "oops/oop.inline2.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5547
diff changeset
    33
#include "prims/forte.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5547
diff changeset
    34
#include "runtime/thread.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5547
diff changeset
    35
#include "runtime/vframe.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5547
diff changeset
    36
#include "runtime/vframeArray.hpp"
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    37
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    38
// These name match the names reported by the forte quality kit
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    39
enum {
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    40
  ticks_no_Java_frame         =  0,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    41
  ticks_no_class_load         = -1,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    42
  ticks_GC_active             = -2,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    43
  ticks_unknown_not_Java      = -3,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    44
  ticks_not_walkable_not_Java = -4,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    45
  ticks_unknown_Java          = -5,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    46
  ticks_not_walkable_Java     = -6,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    47
  ticks_unknown_state         = -7,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    48
  ticks_thread_exit           = -8,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    49
  ticks_deopt                 = -9,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    50
  ticks_safepoint             = -10
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    51
};
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    52
489c9b5090e2 Initial load
duke
parents:
diff changeset
    53
//-------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
    54
489c9b5090e2 Initial load
duke
parents:
diff changeset
    55
// Native interfaces for use by Forte tools.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    56
489c9b5090e2 Initial load
duke
parents:
diff changeset
    57
489c9b5090e2 Initial load
duke
parents:
diff changeset
    58
#ifndef IA64
489c9b5090e2 Initial load
duke
parents:
diff changeset
    59
489c9b5090e2 Initial load
duke
parents:
diff changeset
    60
class vframeStreamForte : public vframeStreamCommon {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    61
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
    62
  // constructor that starts with sender of frame fr (top_frame)
489c9b5090e2 Initial load
duke
parents:
diff changeset
    63
  vframeStreamForte(JavaThread *jt, frame fr, bool stop_at_java_call_stub);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    64
  void forte_next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
    65
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
    66
489c9b5090e2 Initial load
duke
parents:
diff changeset
    67
5233
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
    68
static bool is_decipherable_compiled_frame(JavaThread* thread, frame* fr, nmethod* nm);
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    69
static bool is_decipherable_interpreted_frame(JavaThread* thread,
5233
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
    70
                                              frame* fr,
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
    71
                                              methodOop* method_p,
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
    72
                                              int* bci_p);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    73
489c9b5090e2 Initial load
duke
parents:
diff changeset
    74
489c9b5090e2 Initial load
duke
parents:
diff changeset
    75
489c9b5090e2 Initial load
duke
parents:
diff changeset
    76
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    77
vframeStreamForte::vframeStreamForte(JavaThread *jt,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    78
                                     frame fr,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    79
                                     bool stop_at_java_call_stub) : vframeStreamCommon(jt) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    80
489c9b5090e2 Initial load
duke
parents:
diff changeset
    81
  _stop_at_java_call_stub = stop_at_java_call_stub;
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    82
  _frame = fr;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    83
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    84
  // We must always have a valid frame to start filling
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    85
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    86
  bool filled_in = fill_from_frame();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    87
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
    88
  assert(filled_in, "invariant");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    89
489c9b5090e2 Initial load
duke
parents:
diff changeset
    90
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
    91
489c9b5090e2 Initial load
duke
parents:
diff changeset
    92
489c9b5090e2 Initial load
duke
parents:
diff changeset
    93
// Solaris SPARC Compiler1 needs an additional check on the grandparent
489c9b5090e2 Initial load
duke
parents:
diff changeset
    94
// of the top_frame when the parent of the top_frame is interpreted and
489c9b5090e2 Initial load
duke
parents:
diff changeset
    95
// the grandparent is compiled. However, in this method we do not know
489c9b5090e2 Initial load
duke
parents:
diff changeset
    96
// the relationship of the current _frame relative to the top_frame so
489c9b5090e2 Initial load
duke
parents:
diff changeset
    97
// we implement a more broad sanity check. When the previous callee is
489c9b5090e2 Initial load
duke
parents:
diff changeset
    98
// interpreted and the current sender is compiled, we verify that the
489c9b5090e2 Initial load
duke
parents:
diff changeset
    99
// current sender is also walkable. If it is not walkable, then we mark
489c9b5090e2 Initial load
duke
parents:
diff changeset
   100
// the current vframeStream as at the end.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   101
void vframeStreamForte::forte_next() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   102
  // handle frames with inlining
489c9b5090e2 Initial load
duke
parents:
diff changeset
   103
  if (_mode == compiled_mode &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
   104
      vframeStreamCommon::fill_in_compiled_inlined_sender()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   105
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   106
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   107
489c9b5090e2 Initial load
duke
parents:
diff changeset
   108
  // handle general case
489c9b5090e2 Initial load
duke
parents:
diff changeset
   109
489c9b5090e2 Initial load
duke
parents:
diff changeset
   110
  int loop_count = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   111
  int loop_max = MaxJavaStackTraceDepth * 2;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   112
489c9b5090e2 Initial load
duke
parents:
diff changeset
   113
489c9b5090e2 Initial load
duke
parents:
diff changeset
   114
  do {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   115
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   116
    loop_count++;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   117
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   118
    // By the time we get here we should never see unsafe but better
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   119
    // safe then segv'd
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   120
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   121
    if (loop_count > loop_max || !_frame.safe_for_sender(_thread)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   122
      _mode = at_end_mode;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   123
      return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   124
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   125
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   126
    _frame = _frame.sender(&_reg_map);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   127
489c9b5090e2 Initial load
duke
parents:
diff changeset
   128
  } while (!fill_from_frame());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   129
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   130
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   131
// Determine if 'fr' is a decipherable compiled frame. We are already
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   132
// assured that fr is for a java nmethod.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   133
5233
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   134
static bool is_decipherable_compiled_frame(JavaThread* thread, frame* fr, nmethod* nm) {
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   135
  assert(nm->is_java_method(), "invariant");
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   136
5233
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   137
  if (thread->has_last_Java_frame() && thread->last_Java_pc() == fr->pc()) {
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   138
    // We're stopped at a call into the JVM so look for a PcDesc with
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   139
    // the actual pc reported by the frame.
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   140
    PcDesc* pc_desc = nm->pc_desc_at(fr->pc());
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   141
5233
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   142
    // Did we find a useful PcDesc?
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   143
    if (pc_desc != NULL &&
5233
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   144
        pc_desc->scope_decode_offset() != DebugInformationRecorder::serialized_null) {
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   145
      return true;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   146
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   147
  }
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   148
5233
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   149
  // We're at some random pc in the nmethod so search for the PcDesc
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   150
  // whose pc is greater than the current PC.  It's done this way
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   151
  // because the extra PcDescs that are recorded for improved debug
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   152
  // info record the end of the region covered by the ScopeDesc
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   153
  // instead of the beginning.
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   154
  PcDesc* pc_desc = nm->pc_desc_near(fr->pc() + 1);
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   155
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   156
  // Now do we have a useful PcDesc?
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   157
  if (pc_desc == NULL ||
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   158
      pc_desc->scope_decode_offset() == DebugInformationRecorder::serialized_null) {
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   159
    // No debug information available for this pc
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   160
    // vframeStream would explode if we try and walk the frames.
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   161
    return false;
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   162
  }
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   163
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   164
  // This PcDesc is useful however we must adjust the frame's pc
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   165
  // so that the vframeStream lookups will use this same pc
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   166
  fr->set_pc(pc_desc->real_pc(nm));
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   167
  return true;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   168
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   169
5233
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   170
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   171
// Determine if 'fr' is a walkable interpreted frame. Returns false
489c9b5090e2 Initial load
duke
parents:
diff changeset
   172
// if it is not. *method_p, and *bci_p are not set when false is
489c9b5090e2 Initial load
duke
parents:
diff changeset
   173
// returned. *method_p is non-NULL if frame was executing a Java
489c9b5090e2 Initial load
duke
parents:
diff changeset
   174
// method. *bci_p is != -1 if a valid BCI in the Java method could
489c9b5090e2 Initial load
duke
parents:
diff changeset
   175
// be found.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   176
// Note: this method returns true when a valid Java method is found
489c9b5090e2 Initial load
duke
parents:
diff changeset
   177
// even if a valid BCI cannot be found.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   178
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   179
static bool is_decipherable_interpreted_frame(JavaThread* thread,
5233
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   180
                                              frame* fr,
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   181
                                              methodOop* method_p,
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   182
                                              int* bci_p) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   183
  assert(fr->is_interpreted_frame(), "just checking");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   184
489c9b5090e2 Initial load
duke
parents:
diff changeset
   185
  // top frame is an interpreted frame
489c9b5090e2 Initial load
duke
parents:
diff changeset
   186
  // check if it is walkable (i.e. valid methodOop and valid bci)
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   187
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   188
  // Because we may be racing a gc thread the method and/or bci
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   189
  // of a valid interpreter frame may look bad causing us to
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   190
  // fail the is_interpreted_frame_valid test. If the thread
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   191
  // is in any of the following states we are assured that the
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   192
  // frame is in fact valid and we must have hit the race.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   193
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   194
  JavaThreadState state = thread->thread_state();
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   195
  bool known_valid = (state == _thread_in_native ||
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   196
                      state == _thread_in_vm ||
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   197
                      state == _thread_blocked );
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   198
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   199
  if (known_valid || fr->is_interpreted_frame_valid(thread)) {
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   200
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   201
    // The frame code should completely validate the frame so that
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   202
    // references to methodOop and bci are completely safe to access
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   203
    // If they aren't the frame code should be fixed not this
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   204
    // code. However since gc isn't locked out the values could be
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   205
    // stale. This is a race we can never completely win since we can't
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   206
    // lock out gc so do one last check after retrieving their values
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   207
    // from the frame for additional safety
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   208
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   209
    methodOop method = fr->interpreter_frame_method();
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   210
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   211
    // We've at least found a method.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   212
    // NOTE: there is something to be said for the approach that
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   213
    // if we don't find a valid bci then the method is not likely
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   214
    // a valid method. Then again we may have caught an interpreter
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   215
    // frame in the middle of construction and the bci field is
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   216
    // not yet valid.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   217
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   218
    *method_p = method;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   219
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   220
    // See if gc may have invalidated method since we validated frame
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   221
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   222
    if (!Universe::heap()->is_valid_method(method)) return false;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   223
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   224
    intptr_t bcx = fr->interpreter_frame_bcx();
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   225
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   226
    int      bci = method->validate_bci_from_bcx(bcx);
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   227
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   228
    // note: bci is set to -1 if not a valid bci
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   229
    *bci_p = bci;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   230
    return true;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   231
  }
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   232
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   233
  return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   234
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   235
489c9b5090e2 Initial load
duke
parents:
diff changeset
   236
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   237
// Determine if 'fr' can be used to find an initial Java frame.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   238
// Return false if it can not find a fully decipherable Java frame
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   239
// (in other words a frame that isn't safe to use in a vframe stream).
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   240
// Obviously if it can't even find a Java frame false will also be returned.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   241
//
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   242
// If we find a Java frame decipherable or not then by definition we have
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   243
// identified a method and that will be returned to the caller via method_p.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   244
// If we can determine a bci that is returned also. (Hmm is it possible
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   245
// to return a method and bci and still return false? )
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   246
//
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   247
// The initial Java frame we find (if any) is return via initial_frame_p.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   248
//
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   249
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   250
static bool find_initial_Java_frame(JavaThread* thread,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   251
                                    frame* fr,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   252
                                    frame* initial_frame_p,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   253
                                    methodOop* method_p,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   254
                                    int* bci_p) {
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   255
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   256
  // It is possible that for a frame containing an nmethod
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   257
  // we can capture the method but no bci. If we get no
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   258
  // bci the frame isn't walkable but the method is usable.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   259
  // Therefore we init the returned methodOop to NULL so the
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   260
  // caller can make the distinction.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   261
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   262
  *method_p = NULL;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   263
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   264
  // On the initial call to this method the frame we get may not be
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   265
  // recognizable to us. This should only happen if we are in a JRT_LEAF
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   266
  // or something called by a JRT_LEAF method.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   267
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   268
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   269
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   270
  frame candidate = *fr;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   271
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   272
  // If the starting frame we were given has no codeBlob associated with
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   273
  // it see if we can find such a frame because only frames with codeBlobs
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   274
  // are possible Java frames.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   275
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   276
  if (fr->cb() == NULL) {
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   277
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   278
    // See if we can find a useful frame
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   279
    int loop_count;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   280
    int loop_max = MaxJavaStackTraceDepth * 2;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   281
    RegisterMap map(thread, false);
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   282
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   283
    for (loop_count = 0; loop_count < loop_max; loop_count++) {
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   284
      if (!candidate.safe_for_sender(thread)) return false;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   285
      candidate = candidate.sender(&map);
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   286
      if (candidate.cb() != NULL) break;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   287
    }
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   288
    if (candidate.cb() == NULL) return false;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   289
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   290
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   291
  // We have a frame known to be in the codeCache
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   292
  // We will hopefully be able to figure out something to do with it.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   293
  int loop_count;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   294
  int loop_max = MaxJavaStackTraceDepth * 2;
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   295
  RegisterMap map(thread, false);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   296
489c9b5090e2 Initial load
duke
parents:
diff changeset
   297
  for (loop_count = 0; loop_count < loop_max; loop_count++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   298
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   299
    if (candidate.is_first_frame()) {
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   300
      // If initial frame is frame from StubGenerator and there is no
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   301
      // previous anchor, there are no java frames associated with a method
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   302
      return false;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   303
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   304
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   305
    if (candidate.is_interpreted_frame()) {
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   306
      if (is_decipherable_interpreted_frame(thread, &candidate, method_p, bci_p)) {
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   307
        *initial_frame_p = candidate;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   308
        return true;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   309
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   310
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   311
      // Hopefully we got some data
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   312
      return false;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   313
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   314
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   315
    if (candidate.cb()->is_nmethod()) {
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   316
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   317
      nmethod* nm = (nmethod*) candidate.cb();
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   318
      *method_p = nm->method();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   319
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   320
      // If the frame isn't fully decipherable then the default
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   321
      // value for the bci is a signal that we don't have a bci.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   322
      // If we have a decipherable frame this bci value will
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   323
      // not be used.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   324
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   325
      *bci_p = -1;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   326
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   327
      *initial_frame_p = candidate;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   328
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   329
      // Native wrapper code is trivial to decode by vframeStream
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   330
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   331
      if (nm->is_native_method()) return true;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   332
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   333
      // If it isn't decipherable then we have found a pc that doesn't
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   334
      // have a PCDesc that can get us a bci however we did find
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   335
      // a method
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   336
5233
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   337
      if (!is_decipherable_compiled_frame(thread, &candidate, nm)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   338
        return false;
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   339
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   340
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   341
      // is_decipherable_compiled_frame may modify candidate's pc
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   342
      *initial_frame_p = candidate;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   343
5233
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   344
      assert(nm->pc_desc_at(candidate.pc()) != NULL, "if it's decipherable then pc must be valid");
6fd5e41e3f54 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 670
diff changeset
   345
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   346
      return true;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   347
    }
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   348
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   349
    // Must be some stub frame that we don't care about
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   350
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   351
    if (!candidate.safe_for_sender(thread)) return false;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   352
    candidate = candidate.sender(&map);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   353
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   354
    // If it isn't in the code cache something is wrong
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   355
    // since once we find a frame in the code cache they
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   356
    // all should be there.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   357
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   358
    if (candidate.cb() == NULL) return false;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   359
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   360
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   361
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   362
  return false;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   363
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   364
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   365
489c9b5090e2 Initial load
duke
parents:
diff changeset
   366
489c9b5090e2 Initial load
duke
parents:
diff changeset
   367
// call frame copied from old .h file and renamed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   368
typedef struct {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   369
    jint lineno;                      // line number in the source file
489c9b5090e2 Initial load
duke
parents:
diff changeset
   370
    jmethodID method_id;              // method executed in this frame
489c9b5090e2 Initial load
duke
parents:
diff changeset
   371
} ASGCT_CallFrame;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   372
489c9b5090e2 Initial load
duke
parents:
diff changeset
   373
// call trace copied from old .h file and renamed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   374
typedef struct {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   375
    JNIEnv *env_id;                   // Env where trace was recorded
489c9b5090e2 Initial load
duke
parents:
diff changeset
   376
    jint num_frames;                  // number of frames in this trace
489c9b5090e2 Initial load
duke
parents:
diff changeset
   377
    ASGCT_CallFrame *frames;          // frames
489c9b5090e2 Initial load
duke
parents:
diff changeset
   378
} ASGCT_CallTrace;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   379
489c9b5090e2 Initial load
duke
parents:
diff changeset
   380
static void forte_fill_call_trace_given_top(JavaThread* thd,
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   381
                                            ASGCT_CallTrace* trace,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   382
                                            int depth,
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   383
                                            frame top_frame) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   384
  NoHandleMark nhm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   385
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   386
  frame initial_Java_frame;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   387
  methodOop method;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   388
  int bci;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   389
  int count;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   390
489c9b5090e2 Initial load
duke
parents:
diff changeset
   391
  count = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   392
  assert(trace->frames != NULL, "trace->frames must be non-NULL");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   393
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   394
  bool fully_decipherable = find_initial_Java_frame(thd, &top_frame, &initial_Java_frame, &method, &bci);
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   395
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   396
  // The frame might not be walkable but still recovered a method
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   397
  // (e.g. an nmethod with no scope info for the pc
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   398
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   399
  if (method == NULL) return;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   400
489c9b5090e2 Initial load
duke
parents:
diff changeset
   401
  CollectedHeap* ch = Universe::heap();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   402
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   403
  // The method is not stored GC safe so see if GC became active
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   404
  // after we entered AsyncGetCallTrace() and before we try to
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   405
  // use the methodOop.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   406
  // Yes, there is still a window after this check and before
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   407
  // we use methodOop below, but we can't lock out GC so that
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   408
  // has to be an acceptable risk.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   409
  if (!ch->is_valid_method(method)) {
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   410
    trace->num_frames = ticks_GC_active; // -2
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   411
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   412
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   413
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   414
  // We got a Java frame however it isn't fully decipherable
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   415
  // so it won't necessarily be safe to use it for the
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   416
  // initial frame in the vframe stream.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   417
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   418
  if (!fully_decipherable) {
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   419
    // Take whatever method the top-frame decoder managed to scrape up.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   420
    // We look further at the top frame only if non-safepoint
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   421
    // debugging information is available.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   422
    count++;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   423
    trace->num_frames = count;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   424
    trace->frames[0].method_id = method->find_jmethod_id_or_null();
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   425
    if (!method->is_native()) {
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   426
      trace->frames[0].lineno = bci;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   427
    } else {
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   428
      trace->frames[0].lineno = -3;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   429
    }
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   430
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   431
    if (!initial_Java_frame.safe_for_sender(thd)) return;
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   432
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   433
    RegisterMap map(thd, false);
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   434
    initial_Java_frame = initial_Java_frame.sender(&map);
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   435
  }
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   436
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   437
  vframeStreamForte st(thd, initial_Java_frame, false);
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   438
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   439
  for (; !st.at_end() && count < depth; st.forte_next(), count++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   440
    bci = st.bci();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   441
    method = st.method();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
489c9b5090e2 Initial load
duke
parents:
diff changeset
   443
    // The method is not stored GC safe so see if GC became active
489c9b5090e2 Initial load
duke
parents:
diff changeset
   444
    // after we entered AsyncGetCallTrace() and before we try to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
    // use the methodOop.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   446
    // Yes, there is still a window after this check and before
489c9b5090e2 Initial load
duke
parents:
diff changeset
   447
    // we use methodOop below, but we can't lock out GC so that
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
    // has to be an acceptable risk.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   449
    if (!ch->is_valid_method(method)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
      // we throw away everything we've gathered in this sample since
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
      // none of it is safe
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   452
      trace->num_frames = ticks_GC_active; // -2
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
      return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   455
489c9b5090e2 Initial load
duke
parents:
diff changeset
   456
    trace->frames[count].method_id = method->find_jmethod_id_or_null();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   457
    if (!method->is_native()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   458
      trace->frames[count].lineno = bci;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   459
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
      trace->frames[count].lineno = -3;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   461
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   462
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
  trace->num_frames = count;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
  return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   465
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   466
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
// Forte Analyzer AsyncGetCallTrace() entry point. Currently supported
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
// on Linux X86, Solaris SPARC and Solaris X86.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   470
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   471
// Async-safe version of GetCallTrace being called from a signal handler
489c9b5090e2 Initial load
duke
parents:
diff changeset
   472
// when a LWP gets interrupted by SIGPROF but the stack traces are filled
489c9b5090e2 Initial load
duke
parents:
diff changeset
   473
// with different content (see below).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   474
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   475
// This function must only be called when JVM/TI
489c9b5090e2 Initial load
duke
parents:
diff changeset
   476
// CLASS_LOAD events have been enabled since agent startup. The enabled
489c9b5090e2 Initial load
duke
parents:
diff changeset
   477
// event will cause the jmethodIDs to be allocated at class load time.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   478
// The jmethodIDs cannot be allocated in a signal handler because locks
489c9b5090e2 Initial load
duke
parents:
diff changeset
   479
// cannot be grabbed in a signal handler safely.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   480
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   481
// void (*AsyncGetCallTrace)(ASGCT_CallTrace *trace, jint depth, void* ucontext)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   482
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   483
// Called by the profiler to obtain the current method call stack trace for
489c9b5090e2 Initial load
duke
parents:
diff changeset
   484
// a given thread. The thread is identified by the env_id field in the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   485
// ASGCT_CallTrace structure. The profiler agent should allocate a ASGCT_CallTrace
489c9b5090e2 Initial load
duke
parents:
diff changeset
   486
// structure with enough memory for the requested stack depth. The VM fills in
489c9b5090e2 Initial load
duke
parents:
diff changeset
   487
// the frames buffer and the num_frames field.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   488
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   489
// Arguments:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   490
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   491
//   trace    - trace data structure to be filled by the VM.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   492
//   depth    - depth of the call stack trace.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   493
//   ucontext - ucontext_t of the LWP
489c9b5090e2 Initial load
duke
parents:
diff changeset
   494
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   495
// ASGCT_CallTrace:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   496
//   typedef struct {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   497
//       JNIEnv *env_id;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   498
//       jint num_frames;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   499
//       ASGCT_CallFrame *frames;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   500
//   } ASGCT_CallTrace;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
// Fields:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
//   env_id     - ID of thread which executed this trace.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
//   num_frames - number of frames in the trace.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
//                (< 0 indicates the frame is not walkable).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
//   frames     - the ASGCT_CallFrames that make up this trace. Callee followed by callers.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
//  ASGCT_CallFrame:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
//    typedef struct {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
//        jint lineno;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
//        jmethodID method_id;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
//    } ASGCT_CallFrame;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   513
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
//  Fields:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
//    1) For Java frame (interpreted and compiled),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
//       lineno    - bci of the method being executed or -1 if bci is not available
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
//       method_id - jmethodID of the method being executed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
//    2) For native method
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
//       lineno    - (-3)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
//       method_id - jmethodID of the method being executed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
489c9b5090e2 Initial load
duke
parents:
diff changeset
   522
extern "C" {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) {
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   524
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   525
// This is if'd out because we no longer use thread suspension.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   526
// However if someone wanted to backport this to a 5.0 jvm then this
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   527
// code would be important.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   528
#if 0
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
  if (SafepointSynchronize::is_synchronizing()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   530
    // The safepoint mechanism is trying to synchronize all the threads.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   531
    // Since this can involve thread suspension, it is not safe for us
489c9b5090e2 Initial load
duke
parents:
diff changeset
   532
    // to be here. We can reduce the deadlock risk window by quickly
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
    // returning to the SIGPROF handler. However, it is still possible
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
    // for VMThread to catch us here or in the SIGPROF handler. If we
489c9b5090e2 Initial load
duke
parents:
diff changeset
   535
    // are suspended while holding a resource and another thread blocks
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
    // on that resource in the SIGPROF handler, then we will have a
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
    // three-thread deadlock (VMThread, this thread, the other thread).
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   538
    trace->num_frames = ticks_safepoint; // -10
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
  }
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   541
#endif
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
  JavaThread* thread;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
  if (trace->env_id == NULL ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
    (thread = JavaThread::thread_from_jni_environment(trace->env_id)) == NULL ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
    thread->is_exiting()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   548
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
    // bad env_id, thread has exited or thread is exiting
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   550
    trace->num_frames = ticks_thread_exit; // -8
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   551
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   553
489c9b5090e2 Initial load
duke
parents:
diff changeset
   554
  if (thread->in_deopt_handler()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
    // thread is in the deoptimization handler so return no frames
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   556
    trace->num_frames = ticks_deopt; // -9
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   559
489c9b5090e2 Initial load
duke
parents:
diff changeset
   560
  assert(JavaThread::current() == thread,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
         "AsyncGetCallTrace must be called by the current interrupted thread");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   562
489c9b5090e2 Initial load
duke
parents:
diff changeset
   563
  if (!JvmtiExport::should_post_class_load()) {
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   564
    trace->num_frames = ticks_no_class_load; // -1
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   565
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   566
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   567
489c9b5090e2 Initial load
duke
parents:
diff changeset
   568
  if (Universe::heap()->is_gc_active()) {
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   569
    trace->num_frames = ticks_GC_active; // -2
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   570
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   572
489c9b5090e2 Initial load
duke
parents:
diff changeset
   573
  switch (thread->thread_state()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   574
  case _thread_new:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   575
  case _thread_uninitialized:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   576
  case _thread_new_trans:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   577
    // We found the thread on the threads list above, but it is too
489c9b5090e2 Initial load
duke
parents:
diff changeset
   578
    // young to be useful so return that there are no Java frames.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   579
    trace->num_frames = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   580
    break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   581
  case _thread_in_native:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   582
  case _thread_in_native_trans:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
  case _thread_blocked:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   584
  case _thread_blocked_trans:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   585
  case _thread_in_vm:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   586
  case _thread_in_vm_trans:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   587
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   588
      frame fr;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
489c9b5090e2 Initial load
duke
parents:
diff changeset
   590
      // param isInJava == false - indicate we aren't in Java code
489c9b5090e2 Initial load
duke
parents:
diff changeset
   591
      if (!thread->pd_get_top_frame_for_signal_handler(&fr, ucontext, false)) {
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   592
        trace->num_frames = ticks_unknown_not_Java;  // -3 unknown frame
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   593
      } else {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   594
        if (!thread->has_last_Java_frame()) {
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   595
          trace->num_frames = 0; // No Java frames
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   596
        } else {
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   597
          trace->num_frames = ticks_not_walkable_not_Java;    // -4 non walkable frame by default
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   598
          forte_fill_call_trace_given_top(thread, trace, depth, fr);
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   599
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   600
          // This assert would seem to be valid but it is not.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   601
          // It would be valid if we weren't possibly racing a gc
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   602
          // thread. A gc thread can make a valid interpreted frame
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   603
          // look invalid. It's a small window but it does happen.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   604
          // The assert is left here commented out as a reminder.
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   605
          // assert(trace->num_frames != ticks_not_walkable_not_Java, "should always be walkable");
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   606
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   607
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   608
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   609
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   610
    break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   611
  case _thread_in_Java:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   612
  case _thread_in_Java_trans:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   613
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   614
      frame fr;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   615
489c9b5090e2 Initial load
duke
parents:
diff changeset
   616
      // param isInJava == true - indicate we are in Java code
489c9b5090e2 Initial load
duke
parents:
diff changeset
   617
      if (!thread->pd_get_top_frame_for_signal_handler(&fr, ucontext, true)) {
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   618
        trace->num_frames = ticks_unknown_Java;  // -5 unknown frame
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   619
      } else {
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   620
        trace->num_frames = ticks_not_walkable_Java;  // -6, non walkable frame by default
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   621
        forte_fill_call_trace_given_top(thread, trace, depth, fr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   622
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   623
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   624
    break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   625
  default:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   626
    // Unknown thread state
354
3b42d6fdcb82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 1
diff changeset
   627
    trace->num_frames = ticks_unknown_state; // -7
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   628
    break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   629
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   630
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   631
489c9b5090e2 Initial load
duke
parents:
diff changeset
   632
489c9b5090e2 Initial load
duke
parents:
diff changeset
   633
#ifndef _WINDOWS
489c9b5090e2 Initial load
duke
parents:
diff changeset
   634
// Support for the Forte(TM) Peformance Tools collector.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   635
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   636
// The method prototype is derived from libcollector.h. For more
489c9b5090e2 Initial load
duke
parents:
diff changeset
   637
// information, please see the libcollect man page.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   638
489c9b5090e2 Initial load
duke
parents:
diff changeset
   639
// Method to let libcollector know about a dynamically loaded function.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   640
// Because it is weakly bound, the calls become NOP's when the library
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
// isn't present.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   642
void    collector_func_load(char* name,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   643
                            void* null_argument_1,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   644
                            void* null_argument_2,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   645
                            void *vaddr,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   646
                            int size,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   647
                            int zero_argument,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   648
                            void* null_argument_3);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   649
#pragma weak collector_func_load
489c9b5090e2 Initial load
duke
parents:
diff changeset
   650
#define collector_func_load(x0,x1,x2,x3,x4,x5,x6) \
489c9b5090e2 Initial load
duke
parents:
diff changeset
   651
        ( collector_func_load ? collector_func_load(x0,x1,x2,x3,x4,x5,x6),0 : 0 )
489c9b5090e2 Initial load
duke
parents:
diff changeset
   652
#endif // !_WINDOWS
489c9b5090e2 Initial load
duke
parents:
diff changeset
   653
489c9b5090e2 Initial load
duke
parents:
diff changeset
   654
} // end extern "C"
489c9b5090e2 Initial load
duke
parents:
diff changeset
   655
#endif // !IA64
489c9b5090e2 Initial load
duke
parents:
diff changeset
   656
489c9b5090e2 Initial load
duke
parents:
diff changeset
   657
void Forte::register_stub(const char* name, address start, address end) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   658
#if !defined(_WINDOWS) && !defined(IA64)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   659
  assert(pointer_delta(end, start, sizeof(jbyte)) < INT_MAX,
5402
c51fd0c1d005 6888953: some calls to function-like macros are missing semicolons
jcoomes
parents: 5233
diff changeset
   660
         "Code size exceeds maximum range");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   661
489c9b5090e2 Initial load
duke
parents:
diff changeset
   662
  collector_func_load((char*)name, NULL, NULL, start,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   663
    pointer_delta(end, start, sizeof(jbyte)), 0, NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   664
#endif // !_WINDOWS && !IA64
489c9b5090e2 Initial load
duke
parents:
diff changeset
   665
}