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annotate src/share/vm/prims/forte.cpp @ 8051:12e01444ca2d

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8006683: Add WhiteBox API to testing of compiler Reviewed-by: kvn, vlivanov
author iignatyev
date Wed, 13 Feb 2013 08:29:04 -0800
parents 59c790074993
children dcb062bea05b
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1 /*
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2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "code/debugInfoRec.hpp"
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27 #include "code/pcDesc.hpp"
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28 #include "gc_interface/collectedHeap.inline.hpp"
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29 #include "memory/space.hpp"
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30 #include "memory/universe.inline.hpp"
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31 #include "oops/oop.inline.hpp"
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32 #include "oops/oop.inline2.hpp"
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33 #include "prims/forte.hpp"
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34 #include "runtime/thread.hpp"
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35 #include "runtime/vframe.hpp"
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36 #include "runtime/vframeArray.hpp"
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37
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38 // These name match the names reported by the forte quality kit
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39 enum {
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40 ticks_no_Java_frame = 0,
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41 ticks_no_class_load = -1,
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42 ticks_GC_active = -2,
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43 ticks_unknown_not_Java = -3,
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44 ticks_not_walkable_not_Java = -4,
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45 ticks_unknown_Java = -5,
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46 ticks_not_walkable_Java = -6,
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47 ticks_unknown_state = -7,
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48 ticks_thread_exit = -8,
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49 ticks_deopt = -9,
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50 ticks_safepoint = -10
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51 };
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52
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53 //-------------------------------------------------------
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54
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55 // Native interfaces for use by Forte tools.
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56
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57
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58 #ifndef IA64
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59
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60 class vframeStreamForte : public vframeStreamCommon {
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61 public:
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62 // constructor that starts with sender of frame fr (top_frame)
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63 vframeStreamForte(JavaThread *jt, frame fr, bool stop_at_java_call_stub);
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64 void forte_next();
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65 };
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67
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68 static bool is_decipherable_compiled_frame(JavaThread* thread, frame* fr, nmethod* nm);
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69 static bool is_decipherable_interpreted_frame(JavaThread* thread,
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70 frame* fr,
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71 Method** method_p,
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72 int* bci_p);
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76
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77 vframeStreamForte::vframeStreamForte(JavaThread *jt,
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78 frame fr,
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79 bool stop_at_java_call_stub) : vframeStreamCommon(jt) {
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81 _stop_at_java_call_stub = stop_at_java_call_stub;
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82 _frame = fr;
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83
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84 // We must always have a valid frame to start filling
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85
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86 bool filled_in = fill_from_frame();
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87
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88 assert(filled_in, "invariant");
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89
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90 }
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91
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92
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93 // Solaris SPARC Compiler1 needs an additional check on the grandparent
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94 // of the top_frame when the parent of the top_frame is interpreted and
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95 // the grandparent is compiled. However, in this method we do not know
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96 // the relationship of the current _frame relative to the top_frame so
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97 // we implement a more broad sanity check. When the previous callee is
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98 // interpreted and the current sender is compiled, we verify that the
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99 // current sender is also walkable. If it is not walkable, then we mark
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100 // the current vframeStream as at the end.
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101 void vframeStreamForte::forte_next() {
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102 // handle frames with inlining
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103 if (_mode == compiled_mode &&
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104 vframeStreamCommon::fill_in_compiled_inlined_sender()) {
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105 return;
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106 }
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108 // handle general case
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109
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110 int loop_count = 0;
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111 int loop_max = MaxJavaStackTraceDepth * 2;
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112
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113
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114 do {
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115
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116 loop_count++;
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117
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118 // By the time we get here we should never see unsafe but better
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119 // safe then segv'd
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121 if (loop_count > loop_max || !_frame.safe_for_sender(_thread)) {
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122 _mode = at_end_mode;
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123 return;
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124 }
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125
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126 _frame = _frame.sender(&_reg_map);
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128 } while (!fill_from_frame());
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129 }
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130
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131 // Determine if 'fr' is a decipherable compiled frame. We are already
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132 // assured that fr is for a java nmethod.
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133
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134 static bool is_decipherable_compiled_frame(JavaThread* thread, frame* fr, nmethod* nm) {
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135 assert(nm->is_java_method(), "invariant");
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136
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137 if (thread->has_last_Java_frame() && thread->last_Java_pc() == fr->pc()) {
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138 // We're stopped at a call into the JVM so look for a PcDesc with
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139 // the actual pc reported by the frame.
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140 PcDesc* pc_desc = nm->pc_desc_at(fr->pc());
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141
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142 // Did we find a useful PcDesc?
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143 if (pc_desc != NULL &&
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144 pc_desc->scope_decode_offset() != DebugInformationRecorder::serialized_null) {
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145 return true;
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146 }
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147 }
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148
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149 // We're at some random pc in the nmethod so search for the PcDesc
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150 // whose pc is greater than the current PC. It's done this way
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151 // because the extra PcDescs that are recorded for improved debug
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152 // info record the end of the region covered by the ScopeDesc
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153 // instead of the beginning.
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154 PcDesc* pc_desc = nm->pc_desc_near(fr->pc() + 1);
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155
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156 // Now do we have a useful PcDesc?
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157 if (pc_desc == NULL ||
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158 pc_desc->scope_decode_offset() == DebugInformationRecorder::serialized_null) {
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159 // No debug information available for this pc
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160 // vframeStream would explode if we try and walk the frames.
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161 return false;
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162 }
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163
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164 // This PcDesc is useful however we must adjust the frame's pc
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165 // so that the vframeStream lookups will use this same pc
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166 fr->set_pc(pc_desc->real_pc(nm));
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167 return true;
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168 }
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169
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170
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171 // Determine if 'fr' is a walkable interpreted frame. Returns false
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172 // if it is not. *method_p, and *bci_p are not set when false is
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173 // returned. *method_p is non-NULL if frame was executing a Java
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174 // method. *bci_p is != -1 if a valid BCI in the Java method could
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175 // be found.
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176 // Note: this method returns true when a valid Java method is found
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177 // even if a valid BCI cannot be found.
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178
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179 static bool is_decipherable_interpreted_frame(JavaThread* thread,
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180 frame* fr,
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181 Method** method_p,
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182 int* bci_p) {
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183 assert(fr->is_interpreted_frame(), "just checking");
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184
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185 // top frame is an interpreted frame
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186 // check if it is walkable (i.e. valid Method* and valid bci)
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187
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188 // Because we may be racing a gc thread the method and/or bci
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189 // of a valid interpreter frame may look bad causing us to
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190 // fail the is_interpreted_frame_valid test. If the thread
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191 // is in any of the following states we are assured that the
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192 // frame is in fact valid and we must have hit the race.
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193
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194 JavaThreadState state = thread->thread_state();
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195 bool known_valid = (state == _thread_in_native ||
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196 state == _thread_in_vm ||
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197 state == _thread_blocked );
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198
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199 if (known_valid || fr->is_interpreted_frame_valid(thread)) {
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200
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201 // The frame code should completely validate the frame so that
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202 // references to Method* and bci are completely safe to access
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203 // If they aren't the frame code should be fixed not this
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204 // code. However since gc isn't locked out the values could be
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205 // stale. This is a race we can never completely win since we can't
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206 // lock out gc so do one last check after retrieving their values
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207 // from the frame for additional safety
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208
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209 Method* method = fr->interpreter_frame_method();
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210
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211 // We've at least found a method.
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212 // NOTE: there is something to be said for the approach that
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213 // if we don't find a valid bci then the method is not likely
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214 // a valid method. Then again we may have caught an interpreter
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215 // frame in the middle of construction and the bci field is
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216 // not yet valid.
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217
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218 *method_p = method;
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219 if (!method->is_valid_method()) return false;
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220
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221 intptr_t bcx = fr->interpreter_frame_bcx();
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222
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223 int bci = method->validate_bci_from_bcx(bcx);
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224
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225 // note: bci is set to -1 if not a valid bci
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226 *bci_p = bci;
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227 return true;
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228 }
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229
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230 return false;
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231 }
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232
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233
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234 // Determine if 'fr' can be used to find an initial Java frame.
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235 // Return false if it can not find a fully decipherable Java frame
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236 // (in other words a frame that isn't safe to use in a vframe stream).
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237 // Obviously if it can't even find a Java frame false will also be returned.
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238 //
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239 // If we find a Java frame decipherable or not then by definition we have
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240 // identified a method and that will be returned to the caller via method_p.
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241 // If we can determine a bci that is returned also. (Hmm is it possible
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242 // to return a method and bci and still return false? )
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243 //
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244 // The initial Java frame we find (if any) is return via initial_frame_p.
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245 //
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246
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247 static bool find_initial_Java_frame(JavaThread* thread,
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248 frame* fr,
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249 frame* initial_frame_p,
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250 Method** method_p,
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251 int* bci_p) {
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252
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253 // It is possible that for a frame containing an nmethod
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254 // we can capture the method but no bci. If we get no
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255 // bci the frame isn't walkable but the method is usable.
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256 // Therefore we init the returned Method* to NULL so the
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257 // caller can make the distinction.
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258
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259 *method_p = NULL;
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260
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261 // On the initial call to this method the frame we get may not be
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262 // recognizable to us. This should only happen if we are in a JRT_LEAF
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263 // or something called by a JRT_LEAF method.
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264
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265
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266
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267 frame candidate = *fr;
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268
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269 // If the starting frame we were given has no codeBlob associated with
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270 // it see if we can find such a frame because only frames with codeBlobs
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271 // are possible Java frames.
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272
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273 if (fr->cb() == NULL) {
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274
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275 // See if we can find a useful frame
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276 int loop_count;
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277 int loop_max = MaxJavaStackTraceDepth * 2;
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278 RegisterMap map(thread, false);
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279
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280 for (loop_count = 0; loop_count < loop_max; loop_count++) {
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281 if (!candidate.safe_for_sender(thread)) return false;
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282 candidate = candidate.sender(&map);
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283 if (candidate.cb() != NULL) break;
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284 }
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285 if (candidate.cb() == NULL) return false;
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286 }
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287
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288 // We have a frame known to be in the codeCache
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289 // We will hopefully be able to figure out something to do with it.
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290 int loop_count;
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291 int loop_max = MaxJavaStackTraceDepth * 2;
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292 RegisterMap map(thread, false);
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293
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294 for (loop_count = 0; loop_count < loop_max; loop_count++) {
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295
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296 if (candidate.is_first_frame()) {
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297 // If initial frame is frame from StubGenerator and there is no
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298 // previous anchor, there are no java frames associated with a method
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299 return false;
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300 }
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301
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302 if (candidate.is_interpreted_frame()) {
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303 if (is_decipherable_interpreted_frame(thread, &candidate, method_p, bci_p)) {
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304 *initial_frame_p = candidate;
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305 return true;
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306 }
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307
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308 // Hopefully we got some data
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309 return false;
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310 }
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311
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312 if (candidate.cb()->is_nmethod()) {
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313
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314 nmethod* nm = (nmethod*) candidate.cb();
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315 *method_p = nm->method();
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316
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317 // If the frame isn't fully decipherable then the default
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318 // value for the bci is a signal that we don't have a bci.
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319 // If we have a decipherable frame this bci value will
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320 // not be used.
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321
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322 *bci_p = -1;
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323
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324 *initial_frame_p = candidate;
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325
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326 // Native wrapper code is trivial to decode by vframeStream
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327
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328 if (nm->is_native_method()) return true;
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329
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
330 // If it isn't decipherable then we have found a pc that doesn't
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
331 // have a PCDesc that can get us a bci however we did find
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
332 // a method
0
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parents:
diff changeset
333
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547cbe6dacc5 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
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parents: 196
diff changeset
334 if (!is_decipherable_compiled_frame(thread, &candidate, nm)) {
0
a61af66fc99e Initial load
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335 return false;
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
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parents: 0
diff changeset
336 }
0
a61af66fc99e Initial load
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parents:
diff changeset
337
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
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diff changeset
338 // is_decipherable_compiled_frame may modify candidate's pc
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
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parents: 0
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339 *initial_frame_p = candidate;
0
a61af66fc99e Initial load
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340
1349
547cbe6dacc5 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
never
parents: 196
diff changeset
341 assert(nm->pc_desc_at(candidate.pc()) != NULL, "if it's decipherable then pc must be valid");
547cbe6dacc5 6936709: AsyncGetCallTrace doesn't handle inexact stack walking properly
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parents: 196
diff changeset
342
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
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343 return true;
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
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parents: 0
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344 }
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sgoldman
parents: 0
diff changeset
345
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
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346 // Must be some stub frame that we don't care about
0
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parents:
diff changeset
347
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
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parents: 0
diff changeset
348 if (!candidate.safe_for_sender(thread)) return false;
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
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349 candidate = candidate.sender(&map);
0
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350
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
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351 // If it isn't in the code cache something is wrong
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
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352 // since once we find a frame in the code cache they
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
353 // all should be there.
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
354
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
355 if (candidate.cb() == NULL) return false;
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
356
0
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parents:
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357 }
a61af66fc99e Initial load
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358
107
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359 return false;
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
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parents: 0
diff changeset
360
0
a61af66fc99e Initial load
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parents:
diff changeset
361 }
a61af66fc99e Initial load
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parents:
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362
a61af66fc99e Initial load
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parents:
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363
a61af66fc99e Initial load
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364 // call frame copied from old .h file and renamed
a61af66fc99e Initial load
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365 typedef struct {
a61af66fc99e Initial load
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366 jint lineno; // line number in the source file
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367 jmethodID method_id; // method executed in this frame
a61af66fc99e Initial load
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368 } ASGCT_CallFrame;
a61af66fc99e Initial load
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369
a61af66fc99e Initial load
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370 // call trace copied from old .h file and renamed
a61af66fc99e Initial load
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parents:
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371 typedef struct {
a61af66fc99e Initial load
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372 JNIEnv *env_id; // Env where trace was recorded
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373 jint num_frames; // number of frames in this trace
a61af66fc99e Initial load
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374 ASGCT_CallFrame *frames; // frames
a61af66fc99e Initial load
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parents:
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375 } ASGCT_CallTrace;
a61af66fc99e Initial load
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parents:
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376
a61af66fc99e Initial load
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377 static void forte_fill_call_trace_given_top(JavaThread* thd,
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
378 ASGCT_CallTrace* trace,
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
379 int depth,
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
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parents: 0
diff changeset
380 frame top_frame) {
0
a61af66fc99e Initial load
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parents:
diff changeset
381 NoHandleMark nhm;
a61af66fc99e Initial load
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parents:
diff changeset
382
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
383 frame initial_Java_frame;
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 3960
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384 Method* method;
0
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385 int bci;
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386 int count;
a61af66fc99e Initial load
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parents:
diff changeset
387
a61af66fc99e Initial load
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parents:
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388 count = 0;
a61af66fc99e Initial load
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parents:
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389 assert(trace->frames != NULL, "trace->frames must be non-NULL");
a61af66fc99e Initial load
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parents:
diff changeset
390
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
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parents: 0
diff changeset
391 bool fully_decipherable = find_initial_Java_frame(thd, &top_frame, &initial_Java_frame, &method, &bci);
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
392
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
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parents: 0
diff changeset
393 // The frame might not be walkable but still recovered a method
7176
59c790074993 8003635: NPG: AsynchGetCallTrace broken by Method* virtual call
coleenp
parents: 6725
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394 // (e.g. an nmethod with no scope info for the pc)
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
395
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
396 if (method == NULL) return;
0
a61af66fc99e Initial load
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parents:
diff changeset
397
7176
59c790074993 8003635: NPG: AsynchGetCallTrace broken by Method* virtual call
coleenp
parents: 6725
diff changeset
398 if (!method->is_valid_method()) {
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
399 trace->num_frames = ticks_GC_active; // -2
0
a61af66fc99e Initial load
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parents:
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400 return;
a61af66fc99e Initial load
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parents:
diff changeset
401 }
a61af66fc99e Initial load
duke
parents:
diff changeset
402
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
403 // We got a Java frame however it isn't fully decipherable
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
404 // so it won't necessarily be safe to use it for the
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
405 // initial frame in the vframe stream.
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
406
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
407 if (!fully_decipherable) {
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
408 // Take whatever method the top-frame decoder managed to scrape up.
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
409 // We look further at the top frame only if non-safepoint
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
410 // debugging information is available.
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
411 count++;
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
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parents: 0
diff changeset
412 trace->num_frames = count;
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
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parents: 0
diff changeset
413 trace->frames[0].method_id = method->find_jmethod_id_or_null();
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
414 if (!method->is_native()) {
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
415 trace->frames[0].lineno = bci;
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
416 } else {
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
417 trace->frames[0].lineno = -3;
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
418 }
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
419
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
420 if (!initial_Java_frame.safe_for_sender(thd)) return;
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
421
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
422 RegisterMap map(thd, false);
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
423 initial_Java_frame = initial_Java_frame.sender(&map);
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
424 }
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
425
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
426 vframeStreamForte st(thd, initial_Java_frame, false);
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
427
0
a61af66fc99e Initial load
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parents:
diff changeset
428 for (; !st.at_end() && count < depth; st.forte_next(), count++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
429 bci = st.bci();
a61af66fc99e Initial load
duke
parents:
diff changeset
430 method = st.method();
a61af66fc99e Initial load
duke
parents:
diff changeset
431
7176
59c790074993 8003635: NPG: AsynchGetCallTrace broken by Method* virtual call
coleenp
parents: 6725
diff changeset
432 if (!method->is_valid_method()) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
433 // we throw away everything we've gathered in this sample since
a61af66fc99e Initial load
duke
parents:
diff changeset
434 // none of it is safe
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
435 trace->num_frames = ticks_GC_active; // -2
0
a61af66fc99e Initial load
duke
parents:
diff changeset
436 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
437 }
a61af66fc99e Initial load
duke
parents:
diff changeset
438
a61af66fc99e Initial load
duke
parents:
diff changeset
439 trace->frames[count].method_id = method->find_jmethod_id_or_null();
a61af66fc99e Initial load
duke
parents:
diff changeset
440 if (!method->is_native()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
441 trace->frames[count].lineno = bci;
a61af66fc99e Initial load
duke
parents:
diff changeset
442 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
443 trace->frames[count].lineno = -3;
a61af66fc99e Initial load
duke
parents:
diff changeset
444 }
a61af66fc99e Initial load
duke
parents:
diff changeset
445 }
a61af66fc99e Initial load
duke
parents:
diff changeset
446 trace->num_frames = count;
a61af66fc99e Initial load
duke
parents:
diff changeset
447 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
448 }
a61af66fc99e Initial load
duke
parents:
diff changeset
449
a61af66fc99e Initial load
duke
parents:
diff changeset
450
a61af66fc99e Initial load
duke
parents:
diff changeset
451 // Forte Analyzer AsyncGetCallTrace() entry point. Currently supported
a61af66fc99e Initial load
duke
parents:
diff changeset
452 // on Linux X86, Solaris SPARC and Solaris X86.
a61af66fc99e Initial load
duke
parents:
diff changeset
453 //
a61af66fc99e Initial load
duke
parents:
diff changeset
454 // Async-safe version of GetCallTrace being called from a signal handler
a61af66fc99e Initial load
duke
parents:
diff changeset
455 // when a LWP gets interrupted by SIGPROF but the stack traces are filled
a61af66fc99e Initial load
duke
parents:
diff changeset
456 // with different content (see below).
a61af66fc99e Initial load
duke
parents:
diff changeset
457 //
a61af66fc99e Initial load
duke
parents:
diff changeset
458 // This function must only be called when JVM/TI
a61af66fc99e Initial load
duke
parents:
diff changeset
459 // CLASS_LOAD events have been enabled since agent startup. The enabled
a61af66fc99e Initial load
duke
parents:
diff changeset
460 // event will cause the jmethodIDs to be allocated at class load time.
a61af66fc99e Initial load
duke
parents:
diff changeset
461 // The jmethodIDs cannot be allocated in a signal handler because locks
a61af66fc99e Initial load
duke
parents:
diff changeset
462 // cannot be grabbed in a signal handler safely.
a61af66fc99e Initial load
duke
parents:
diff changeset
463 //
a61af66fc99e Initial load
duke
parents:
diff changeset
464 // void (*AsyncGetCallTrace)(ASGCT_CallTrace *trace, jint depth, void* ucontext)
a61af66fc99e Initial load
duke
parents:
diff changeset
465 //
a61af66fc99e Initial load
duke
parents:
diff changeset
466 // Called by the profiler to obtain the current method call stack trace for
a61af66fc99e Initial load
duke
parents:
diff changeset
467 // a given thread. The thread is identified by the env_id field in the
a61af66fc99e Initial load
duke
parents:
diff changeset
468 // ASGCT_CallTrace structure. The profiler agent should allocate a ASGCT_CallTrace
a61af66fc99e Initial load
duke
parents:
diff changeset
469 // structure with enough memory for the requested stack depth. The VM fills in
a61af66fc99e Initial load
duke
parents:
diff changeset
470 // the frames buffer and the num_frames field.
a61af66fc99e Initial load
duke
parents:
diff changeset
471 //
a61af66fc99e Initial load
duke
parents:
diff changeset
472 // Arguments:
a61af66fc99e Initial load
duke
parents:
diff changeset
473 //
a61af66fc99e Initial load
duke
parents:
diff changeset
474 // trace - trace data structure to be filled by the VM.
a61af66fc99e Initial load
duke
parents:
diff changeset
475 // depth - depth of the call stack trace.
a61af66fc99e Initial load
duke
parents:
diff changeset
476 // ucontext - ucontext_t of the LWP
a61af66fc99e Initial load
duke
parents:
diff changeset
477 //
a61af66fc99e Initial load
duke
parents:
diff changeset
478 // ASGCT_CallTrace:
a61af66fc99e Initial load
duke
parents:
diff changeset
479 // typedef struct {
a61af66fc99e Initial load
duke
parents:
diff changeset
480 // JNIEnv *env_id;
a61af66fc99e Initial load
duke
parents:
diff changeset
481 // jint num_frames;
a61af66fc99e Initial load
duke
parents:
diff changeset
482 // ASGCT_CallFrame *frames;
a61af66fc99e Initial load
duke
parents:
diff changeset
483 // } ASGCT_CallTrace;
a61af66fc99e Initial load
duke
parents:
diff changeset
484 //
a61af66fc99e Initial load
duke
parents:
diff changeset
485 // Fields:
a61af66fc99e Initial load
duke
parents:
diff changeset
486 // env_id - ID of thread which executed this trace.
a61af66fc99e Initial load
duke
parents:
diff changeset
487 // num_frames - number of frames in the trace.
a61af66fc99e Initial load
duke
parents:
diff changeset
488 // (< 0 indicates the frame is not walkable).
a61af66fc99e Initial load
duke
parents:
diff changeset
489 // frames - the ASGCT_CallFrames that make up this trace. Callee followed by callers.
a61af66fc99e Initial load
duke
parents:
diff changeset
490 //
a61af66fc99e Initial load
duke
parents:
diff changeset
491 // ASGCT_CallFrame:
a61af66fc99e Initial load
duke
parents:
diff changeset
492 // typedef struct {
a61af66fc99e Initial load
duke
parents:
diff changeset
493 // jint lineno;
a61af66fc99e Initial load
duke
parents:
diff changeset
494 // jmethodID method_id;
a61af66fc99e Initial load
duke
parents:
diff changeset
495 // } ASGCT_CallFrame;
a61af66fc99e Initial load
duke
parents:
diff changeset
496 //
a61af66fc99e Initial load
duke
parents:
diff changeset
497 // Fields:
a61af66fc99e Initial load
duke
parents:
diff changeset
498 // 1) For Java frame (interpreted and compiled),
a61af66fc99e Initial load
duke
parents:
diff changeset
499 // lineno - bci of the method being executed or -1 if bci is not available
a61af66fc99e Initial load
duke
parents:
diff changeset
500 // method_id - jmethodID of the method being executed
a61af66fc99e Initial load
duke
parents:
diff changeset
501 // 2) For native method
a61af66fc99e Initial load
duke
parents:
diff changeset
502 // lineno - (-3)
a61af66fc99e Initial load
duke
parents:
diff changeset
503 // method_id - jmethodID of the method being executed
a61af66fc99e Initial load
duke
parents:
diff changeset
504
a61af66fc99e Initial load
duke
parents:
diff changeset
505 extern "C" {
2191
d70fe6ab4436 6588413: Use -fvisibility=hidden for gcc compiles
coleenp
parents: 1972
diff changeset
506 JNIEXPORT
0
a61af66fc99e Initial load
duke
parents:
diff changeset
507 void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) {
a61af66fc99e Initial load
duke
parents:
diff changeset
508 JavaThread* thread;
a61af66fc99e Initial load
duke
parents:
diff changeset
509
a61af66fc99e Initial load
duke
parents:
diff changeset
510 if (trace->env_id == NULL ||
a61af66fc99e Initial load
duke
parents:
diff changeset
511 (thread = JavaThread::thread_from_jni_environment(trace->env_id)) == NULL ||
a61af66fc99e Initial load
duke
parents:
diff changeset
512 thread->is_exiting()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
513
a61af66fc99e Initial load
duke
parents:
diff changeset
514 // bad env_id, thread has exited or thread is exiting
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
515 trace->num_frames = ticks_thread_exit; // -8
0
a61af66fc99e Initial load
duke
parents:
diff changeset
516 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
517 }
a61af66fc99e Initial load
duke
parents:
diff changeset
518
a61af66fc99e Initial load
duke
parents:
diff changeset
519 if (thread->in_deopt_handler()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
520 // thread is in the deoptimization handler so return no frames
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
521 trace->num_frames = ticks_deopt; // -9
0
a61af66fc99e Initial load
duke
parents:
diff changeset
522 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
523 }
a61af66fc99e Initial load
duke
parents:
diff changeset
524
a61af66fc99e Initial load
duke
parents:
diff changeset
525 assert(JavaThread::current() == thread,
a61af66fc99e Initial load
duke
parents:
diff changeset
526 "AsyncGetCallTrace must be called by the current interrupted thread");
a61af66fc99e Initial load
duke
parents:
diff changeset
527
a61af66fc99e Initial load
duke
parents:
diff changeset
528 if (!JvmtiExport::should_post_class_load()) {
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
529 trace->num_frames = ticks_no_class_load; // -1
0
a61af66fc99e Initial load
duke
parents:
diff changeset
530 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
531 }
a61af66fc99e Initial load
duke
parents:
diff changeset
532
a61af66fc99e Initial load
duke
parents:
diff changeset
533 if (Universe::heap()->is_gc_active()) {
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
534 trace->num_frames = ticks_GC_active; // -2
0
a61af66fc99e Initial load
duke
parents:
diff changeset
535 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
536 }
a61af66fc99e Initial load
duke
parents:
diff changeset
537
a61af66fc99e Initial load
duke
parents:
diff changeset
538 switch (thread->thread_state()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
539 case _thread_new:
a61af66fc99e Initial load
duke
parents:
diff changeset
540 case _thread_uninitialized:
a61af66fc99e Initial load
duke
parents:
diff changeset
541 case _thread_new_trans:
a61af66fc99e Initial load
duke
parents:
diff changeset
542 // We found the thread on the threads list above, but it is too
a61af66fc99e Initial load
duke
parents:
diff changeset
543 // young to be useful so return that there are no Java frames.
a61af66fc99e Initial load
duke
parents:
diff changeset
544 trace->num_frames = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
545 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
546 case _thread_in_native:
a61af66fc99e Initial load
duke
parents:
diff changeset
547 case _thread_in_native_trans:
a61af66fc99e Initial load
duke
parents:
diff changeset
548 case _thread_blocked:
a61af66fc99e Initial load
duke
parents:
diff changeset
549 case _thread_blocked_trans:
a61af66fc99e Initial load
duke
parents:
diff changeset
550 case _thread_in_vm:
a61af66fc99e Initial load
duke
parents:
diff changeset
551 case _thread_in_vm_trans:
a61af66fc99e Initial load
duke
parents:
diff changeset
552 {
a61af66fc99e Initial load
duke
parents:
diff changeset
553 frame fr;
a61af66fc99e Initial load
duke
parents:
diff changeset
554
a61af66fc99e Initial load
duke
parents:
diff changeset
555 // param isInJava == false - indicate we aren't in Java code
a61af66fc99e Initial load
duke
parents:
diff changeset
556 if (!thread->pd_get_top_frame_for_signal_handler(&fr, ucontext, false)) {
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
557 trace->num_frames = ticks_unknown_not_Java; // -3 unknown frame
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
558 } else {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
559 if (!thread->has_last_Java_frame()) {
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
560 trace->num_frames = 0; // No Java frames
0
a61af66fc99e Initial load
duke
parents:
diff changeset
561 } else {
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
562 trace->num_frames = ticks_not_walkable_not_Java; // -4 non walkable frame by default
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
563 forte_fill_call_trace_given_top(thread, trace, depth, fr);
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
564
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
565 // This assert would seem to be valid but it is not.
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
566 // It would be valid if we weren't possibly racing a gc
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
567 // thread. A gc thread can make a valid interpreted frame
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
568 // look invalid. It's a small window but it does happen.
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
569 // The assert is left here commented out as a reminder.
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
570 // assert(trace->num_frames != ticks_not_walkable_not_Java, "should always be walkable");
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
571
0
a61af66fc99e Initial load
duke
parents:
diff changeset
572 }
a61af66fc99e Initial load
duke
parents:
diff changeset
573 }
a61af66fc99e Initial load
duke
parents:
diff changeset
574 }
a61af66fc99e Initial load
duke
parents:
diff changeset
575 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
576 case _thread_in_Java:
a61af66fc99e Initial load
duke
parents:
diff changeset
577 case _thread_in_Java_trans:
a61af66fc99e Initial load
duke
parents:
diff changeset
578 {
a61af66fc99e Initial load
duke
parents:
diff changeset
579 frame fr;
a61af66fc99e Initial load
duke
parents:
diff changeset
580
a61af66fc99e Initial load
duke
parents:
diff changeset
581 // param isInJava == true - indicate we are in Java code
a61af66fc99e Initial load
duke
parents:
diff changeset
582 if (!thread->pd_get_top_frame_for_signal_handler(&fr, ucontext, true)) {
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
583 trace->num_frames = ticks_unknown_Java; // -5 unknown frame
0
a61af66fc99e Initial load
duke
parents:
diff changeset
584 } else {
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
585 trace->num_frames = ticks_not_walkable_Java; // -6, non walkable frame by default
0
a61af66fc99e Initial load
duke
parents:
diff changeset
586 forte_fill_call_trace_given_top(thread, trace, depth, fr);
a61af66fc99e Initial load
duke
parents:
diff changeset
587 }
a61af66fc99e Initial load
duke
parents:
diff changeset
588 }
a61af66fc99e Initial load
duke
parents:
diff changeset
589 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
590 default:
a61af66fc99e Initial load
duke
parents:
diff changeset
591 // Unknown thread state
107
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
sgoldman
parents: 0
diff changeset
592 trace->num_frames = ticks_unknown_state; // -7
0
a61af66fc99e Initial load
duke
parents:
diff changeset
593 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
594 }
a61af66fc99e Initial load
duke
parents:
diff changeset
595 }
a61af66fc99e Initial load
duke
parents:
diff changeset
596
a61af66fc99e Initial load
duke
parents:
diff changeset
597
a61af66fc99e Initial load
duke
parents:
diff changeset
598 #ifndef _WINDOWS
a61af66fc99e Initial load
duke
parents:
diff changeset
599 // Support for the Forte(TM) Peformance Tools collector.
a61af66fc99e Initial load
duke
parents:
diff changeset
600 //
a61af66fc99e Initial load
duke
parents:
diff changeset
601 // The method prototype is derived from libcollector.h. For more
a61af66fc99e Initial load
duke
parents:
diff changeset
602 // information, please see the libcollect man page.
a61af66fc99e Initial load
duke
parents:
diff changeset
603
a61af66fc99e Initial load
duke
parents:
diff changeset
604 // Method to let libcollector know about a dynamically loaded function.
a61af66fc99e Initial load
duke
parents:
diff changeset
605 // Because it is weakly bound, the calls become NOP's when the library
a61af66fc99e Initial load
duke
parents:
diff changeset
606 // isn't present.
3960
f08d439fab8c 7089790: integrate bsd-port changes
never
parents: 3899
diff changeset
607 #ifdef __APPLE__
f08d439fab8c 7089790: integrate bsd-port changes
never
parents: 3899
diff changeset
608 // XXXDARWIN: Link errors occur even when __attribute__((weak_import))
f08d439fab8c 7089790: integrate bsd-port changes
never
parents: 3899
diff changeset
609 // is added
f08d439fab8c 7089790: integrate bsd-port changes
never
parents: 3899
diff changeset
610 #define collector_func_load(x0,x1,x2,x3,x4,x5,x6) (0)
f08d439fab8c 7089790: integrate bsd-port changes
never
parents: 3899
diff changeset
611 #else
0
a61af66fc99e Initial load
duke
parents:
diff changeset
612 void collector_func_load(char* name,
a61af66fc99e Initial load
duke
parents:
diff changeset
613 void* null_argument_1,
a61af66fc99e Initial load
duke
parents:
diff changeset
614 void* null_argument_2,
a61af66fc99e Initial load
duke
parents:
diff changeset
615 void *vaddr,
a61af66fc99e Initial load
duke
parents:
diff changeset
616 int size,
a61af66fc99e Initial load
duke
parents:
diff changeset
617 int zero_argument,
a61af66fc99e Initial load
duke
parents:
diff changeset
618 void* null_argument_3);
a61af66fc99e Initial load
duke
parents:
diff changeset
619 #pragma weak collector_func_load
a61af66fc99e Initial load
duke
parents:
diff changeset
620 #define collector_func_load(x0,x1,x2,x3,x4,x5,x6) \
a61af66fc99e Initial load
duke
parents:
diff changeset
621 ( collector_func_load ? collector_func_load(x0,x1,x2,x3,x4,x5,x6),0 : 0 )
3960
f08d439fab8c 7089790: integrate bsd-port changes
never
parents: 3899
diff changeset
622 #endif // __APPLE__
0
a61af66fc99e Initial load
duke
parents:
diff changeset
623 #endif // !_WINDOWS
a61af66fc99e Initial load
duke
parents:
diff changeset
624
a61af66fc99e Initial load
duke
parents:
diff changeset
625 } // end extern "C"
a61af66fc99e Initial load
duke
parents:
diff changeset
626 #endif // !IA64
a61af66fc99e Initial load
duke
parents:
diff changeset
627
a61af66fc99e Initial load
duke
parents:
diff changeset
628 void Forte::register_stub(const char* name, address start, address end) {
a61af66fc99e Initial load
duke
parents:
diff changeset
629 #if !defined(_WINDOWS) && !defined(IA64)
a61af66fc99e Initial load
duke
parents:
diff changeset
630 assert(pointer_delta(end, start, sizeof(jbyte)) < INT_MAX,
1489
cff162798819 6888953: some calls to function-like macros are missing semicolons
jcoomes
parents: 1349
diff changeset
631 "Code size exceeds maximum range");
0
a61af66fc99e Initial load
duke
parents:
diff changeset
632
a61af66fc99e Initial load
duke
parents:
diff changeset
633 collector_func_load((char*)name, NULL, NULL, start,
a61af66fc99e Initial load
duke
parents:
diff changeset
634 pointer_delta(end, start, sizeof(jbyte)), 0, NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
635 #endif // !_WINDOWS && !IA64
a61af66fc99e Initial load
duke
parents:
diff changeset
636 }