Mercurial > hg > truffle
annotate src/share/vm/prims/forte.cpp @ 3762:5c0a3c1858b1
7048782: CMS: assert(last_chunk_index_to_check<= last_chunk_index) failed: parCardTableModRefBS.cpp:359
Summary: The LNC array is sized before the start of a scavenge, while the heap may expand during a scavenge. With CMS, the last block of an arbitrary suffice of the LNC array may expand due to coalition with the expansion delta. We now take care not to attempt access past the end of the LNC array. LNC array code will be cleaned up and suitably encapsulated as part of the forthcoming performance RFE 7043675.
Reviewed-by: brutisso
author | ysr |
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date | Thu, 02 Jun 2011 10:23:36 -0700 |
parents | 1d1603768966 |
children | c124e2e7463e |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
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. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "code/debugInfoRec.hpp" | |
27 #include "code/pcDesc.hpp" | |
28 #include "gc_interface/collectedHeap.inline.hpp" | |
29 #include "memory/space.hpp" | |
30 #include "memory/universe.inline.hpp" | |
31 #include "oops/oop.inline.hpp" | |
32 #include "oops/oop.inline2.hpp" | |
33 #include "prims/forte.hpp" | |
34 #include "runtime/thread.hpp" | |
35 #include "runtime/vframe.hpp" | |
36 #include "runtime/vframeArray.hpp" | |
0 | 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 }; |
0 | 52 |
53 //------------------------------------------------------- | |
54 | |
55 // Native interfaces for use by Forte tools. | |
56 | |
57 | |
58 #ifndef IA64 | |
59 | |
60 class vframeStreamForte : public vframeStreamCommon { | |
61 public: | |
62 // constructor that starts with sender of frame fr (top_frame) | |
63 vframeStreamForte(JavaThread *jt, frame fr, bool stop_at_java_call_stub); | |
64 void forte_next(); | |
65 }; | |
66 | |
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 methodOop* method_p, |
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72 int* bci_p); |
0 | 73 |
74 | |
75 | |
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) { |
0 | 80 |
81 _stop_at_java_call_stub = stop_at_java_call_stub; | |
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82 _frame = fr; |
0 | 83 |
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84 // We must always have a valid frame to start filling |
0 | 85 |
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86 bool filled_in = fill_from_frame(); |
0 | 87 |
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88 assert(filled_in, "invariant"); |
0 | 89 |
90 } | |
91 | |
92 | |
93 // Solaris SPARC Compiler1 needs an additional check on the grandparent | |
94 // of the top_frame when the parent of the top_frame is interpreted and | |
95 // the grandparent is compiled. However, in this method we do not know | |
96 // the relationship of the current _frame relative to the top_frame so | |
97 // we implement a more broad sanity check. When the previous callee is | |
98 // interpreted and the current sender is compiled, we verify that the | |
99 // current sender is also walkable. If it is not walkable, then we mark | |
100 // the current vframeStream as at the end. | |
101 void vframeStreamForte::forte_next() { | |
102 // handle frames with inlining | |
103 if (_mode == compiled_mode && | |
104 vframeStreamCommon::fill_in_compiled_inlined_sender()) { | |
105 return; | |
106 } | |
107 | |
108 // handle general case | |
109 | |
110 int loop_count = 0; | |
111 int loop_max = MaxJavaStackTraceDepth * 2; | |
112 | |
113 | |
114 do { | |
115 | |
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116 loop_count++; |
0 | 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 |
0 | 120 |
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121 if (loop_count > loop_max || !_frame.safe_for_sender(_thread)) { |
0 | 122 _mode = at_end_mode; |
123 return; | |
124 } | |
125 | |
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126 _frame = _frame.sender(&_reg_map); |
0 | 127 |
128 } while (!fill_from_frame()); | |
129 } | |
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; |
0 | 146 } |
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; |
0 | 168 } |
169 | |
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170 |
0 | 171 // Determine if 'fr' is a walkable interpreted frame. Returns false |
172 // if it is not. *method_p, and *bci_p are not set when false is | |
173 // returned. *method_p is non-NULL if frame was executing a Java | |
174 // method. *bci_p is != -1 if a valid BCI in the Java method could | |
175 // be found. | |
176 // Note: this method returns true when a valid Java method is found | |
177 // even if a valid BCI cannot be found. | |
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 methodOop* method_p, |
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182 int* bci_p) { |
0 | 183 assert(fr->is_interpreted_frame(), "just checking"); |
184 | |
185 // top frame is an interpreted frame | |
186 // check if it is walkable (i.e. valid methodOop 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 methodOop 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 methodOop 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 |
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220 // See if gc may have invalidated method since we validated frame |
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221 |
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222 if (!Universe::heap()->is_valid_method(method)) return false; |
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223 |
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224 intptr_t bcx = fr->interpreter_frame_bcx(); |
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225 |
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226 int bci = method->validate_bci_from_bcx(bcx); |
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227 |
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228 // note: bci is set to -1 if not a valid bci |
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229 *bci_p = bci; |
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230 return true; |
0 | 231 } |
107
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232 |
0 | 233 return false; |
234 } | |
235 | |
236 | |
107
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237 // Determine if 'fr' can be used to find an initial Java frame. |
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238 // Return false if it can not find a fully decipherable Java frame |
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239 // (in other words a frame that isn't safe to use in a vframe stream). |
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240 // Obviously if it can't even find a Java frame false will also be returned. |
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241 // |
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242 // If we find a Java frame decipherable or not then by definition we have |
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243 // identified a method and that will be returned to the caller via method_p. |
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244 // If we can determine a bci that is returned also. (Hmm is it possible |
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245 // to return a method and bci and still return false? ) |
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246 // |
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247 // The initial Java frame we find (if any) is return via initial_frame_p. |
0 | 248 // |
107
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249 |
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250 static bool find_initial_Java_frame(JavaThread* thread, |
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251 frame* fr, |
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252 frame* initial_frame_p, |
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253 methodOop* method_p, |
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254 int* bci_p) { |
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255 |
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256 // It is possible that for a frame containing an nmethod |
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257 // we can capture the method but no bci. If we get no |
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258 // bci the frame isn't walkable but the method is usable. |
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259 // Therefore we init the returned methodOop to NULL so the |
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260 // caller can make the distinction. |
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261 |
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262 *method_p = NULL; |
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263 |
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264 // On the initial call to this method the frame we get may not be |
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265 // recognizable to us. This should only happen if we are in a JRT_LEAF |
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266 // or something called by a JRT_LEAF method. |
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267 |
0 | 268 |
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269 |
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270 frame candidate = *fr; |
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271 |
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272 // If the starting frame we were given has no codeBlob associated with |
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273 // it see if we can find such a frame because only frames with codeBlobs |
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274 // are possible Java frames. |
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275 |
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276 if (fr->cb() == NULL) { |
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277 |
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278 // See if we can find a useful frame |
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279 int loop_count; |
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280 int loop_max = MaxJavaStackTraceDepth * 2; |
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281 RegisterMap map(thread, false); |
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282 |
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283 for (loop_count = 0; loop_count < loop_max; loop_count++) { |
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284 if (!candidate.safe_for_sender(thread)) return false; |
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285 candidate = candidate.sender(&map); |
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286 if (candidate.cb() != NULL) break; |
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287 } |
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288 if (candidate.cb() == NULL) return false; |
0 | 289 } |
290 | |
107
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291 // We have a frame known to be in the codeCache |
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292 // We will hopefully be able to figure out something to do with it. |
0 | 293 int loop_count; |
294 int loop_max = MaxJavaStackTraceDepth * 2; | |
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295 RegisterMap map(thread, false); |
0 | 296 |
297 for (loop_count = 0; loop_count < loop_max; loop_count++) { | |
298 | |
107
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299 if (candidate.is_first_frame()) { |
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300 // If initial frame is frame from StubGenerator and there is no |
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301 // previous anchor, there are no java frames associated with a method |
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302 return false; |
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303 } |
0 | 304 |
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305 if (candidate.is_interpreted_frame()) { |
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306 if (is_decipherable_interpreted_frame(thread, &candidate, method_p, bci_p)) { |
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307 *initial_frame_p = candidate; |
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308 return true; |
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309 } |
0 | 310 |
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311 // Hopefully we got some data |
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312 return false; |
0 | 313 } |
314 | |
107
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315 if (candidate.cb()->is_nmethod()) { |
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316 |
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317 nmethod* nm = (nmethod*) candidate.cb(); |
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318 *method_p = nm->method(); |
0 | 319 |
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320 // If the frame isn't fully decipherable then the default |
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321 // value for the bci is a signal that we don't have a bci. |
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322 // If we have a decipherable frame this bci value will |
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323 // not be used. |
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324 |
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325 *bci_p = -1; |
0 | 326 |
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327 *initial_frame_p = candidate; |
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328 |
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329 // Native wrapper code is trivial to decode by vframeStream |
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330 |
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331 if (nm->is_native_method()) return true; |
0 | 332 |
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333 // If it isn't decipherable then we have found a pc that doesn't |
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334 // have a PCDesc that can get us a bci however we did find |
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335 // a method |
0 | 336 |
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337 if (!is_decipherable_compiled_frame(thread, &candidate, nm)) { |
0 | 338 return false; |
107
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339 } |
0 | 340 |
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341 // is_decipherable_compiled_frame may modify candidate's pc |
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342 *initial_frame_p = candidate; |
0 | 343 |
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344 assert(nm->pc_desc_at(candidate.pc()) != NULL, "if it's decipherable then pc must be valid"); |
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345 |
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346 return true; |
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347 } |
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348 |
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349 // Must be some stub frame that we don't care about |
0 | 350 |
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351 if (!candidate.safe_for_sender(thread)) return false; |
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352 candidate = candidate.sender(&map); |
0 | 353 |
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354 // If it isn't in the code cache something is wrong |
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355 // since once we find a frame in the code cache they |
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356 // all should be there. |
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357 |
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358 if (candidate.cb() == NULL) return false; |
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359 |
0 | 360 } |
361 | |
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362 return false; |
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363 |
0 | 364 } |
365 | |
366 | |
367 // call frame copied from old .h file and renamed | |
368 typedef struct { | |
369 jint lineno; // line number in the source file | |
370 jmethodID method_id; // method executed in this frame | |
371 } ASGCT_CallFrame; | |
372 | |
373 // call trace copied from old .h file and renamed | |
374 typedef struct { | |
375 JNIEnv *env_id; // Env where trace was recorded | |
376 jint num_frames; // number of frames in this trace | |
377 ASGCT_CallFrame *frames; // frames | |
378 } ASGCT_CallTrace; | |
379 | |
380 static void forte_fill_call_trace_given_top(JavaThread* thd, | |
107
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381 ASGCT_CallTrace* trace, |
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382 int depth, |
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383 frame top_frame) { |
0 | 384 NoHandleMark nhm; |
385 | |
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386 frame initial_Java_frame; |
0 | 387 methodOop method; |
388 int bci; | |
389 int count; | |
390 | |
391 count = 0; | |
392 assert(trace->frames != NULL, "trace->frames must be non-NULL"); | |
393 | |
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394 bool fully_decipherable = find_initial_Java_frame(thd, &top_frame, &initial_Java_frame, &method, &bci); |
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395 |
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396 // The frame might not be walkable but still recovered a method |
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397 // (e.g. an nmethod with no scope info for the pc |
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398 |
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399 if (method == NULL) return; |
0 | 400 |
401 CollectedHeap* ch = Universe::heap(); | |
402 | |
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403 // The method is not stored GC safe so see if GC became active |
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404 // after we entered AsyncGetCallTrace() and before we try to |
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405 // use the methodOop. |
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406 // Yes, there is still a window after this check and before |
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407 // we use methodOop below, but we can't lock out GC so that |
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408 // has to be an acceptable risk. |
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409 if (!ch->is_valid_method(method)) { |
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410 trace->num_frames = ticks_GC_active; // -2 |
0 | 411 return; |
412 } | |
413 | |
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414 // We got a Java frame however it isn't fully decipherable |
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415 // so it won't necessarily be safe to use it for the |
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416 // initial frame in the vframe stream. |
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417 |
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418 if (!fully_decipherable) { |
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419 // Take whatever method the top-frame decoder managed to scrape up. |
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420 // We look further at the top frame only if non-safepoint |
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421 // debugging information is available. |
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422 count++; |
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423 trace->num_frames = count; |
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424 trace->frames[0].method_id = method->find_jmethod_id_or_null(); |
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425 if (!method->is_native()) { |
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426 trace->frames[0].lineno = bci; |
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427 } else { |
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428 trace->frames[0].lineno = -3; |
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429 } |
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430 |
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431 if (!initial_Java_frame.safe_for_sender(thd)) return; |
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432 |
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433 RegisterMap map(thd, false); |
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434 initial_Java_frame = initial_Java_frame.sender(&map); |
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435 } |
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436 |
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437 vframeStreamForte st(thd, initial_Java_frame, false); |
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438 |
0 | 439 for (; !st.at_end() && count < depth; st.forte_next(), count++) { |
440 bci = st.bci(); | |
441 method = st.method(); | |
442 | |
443 // The method is not stored GC safe so see if GC became active | |
444 // after we entered AsyncGetCallTrace() and before we try to | |
445 // use the methodOop. | |
446 // Yes, there is still a window after this check and before | |
447 // we use methodOop below, but we can't lock out GC so that | |
448 // has to be an acceptable risk. | |
449 if (!ch->is_valid_method(method)) { | |
450 // we throw away everything we've gathered in this sample since | |
451 // none of it is safe | |
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452 trace->num_frames = ticks_GC_active; // -2 |
0 | 453 return; |
454 } | |
455 | |
456 trace->frames[count].method_id = method->find_jmethod_id_or_null(); | |
457 if (!method->is_native()) { | |
458 trace->frames[count].lineno = bci; | |
459 } else { | |
460 trace->frames[count].lineno = -3; | |
461 } | |
462 } | |
463 trace->num_frames = count; | |
464 return; | |
465 } | |
466 | |
467 | |
468 // Forte Analyzer AsyncGetCallTrace() entry point. Currently supported | |
469 // on Linux X86, Solaris SPARC and Solaris X86. | |
470 // | |
471 // Async-safe version of GetCallTrace being called from a signal handler | |
472 // when a LWP gets interrupted by SIGPROF but the stack traces are filled | |
473 // with different content (see below). | |
474 // | |
475 // This function must only be called when JVM/TI | |
476 // CLASS_LOAD events have been enabled since agent startup. The enabled | |
477 // event will cause the jmethodIDs to be allocated at class load time. | |
478 // The jmethodIDs cannot be allocated in a signal handler because locks | |
479 // cannot be grabbed in a signal handler safely. | |
480 // | |
481 // void (*AsyncGetCallTrace)(ASGCT_CallTrace *trace, jint depth, void* ucontext) | |
482 // | |
483 // Called by the profiler to obtain the current method call stack trace for | |
484 // a given thread. The thread is identified by the env_id field in the | |
485 // ASGCT_CallTrace structure. The profiler agent should allocate a ASGCT_CallTrace | |
486 // structure with enough memory for the requested stack depth. The VM fills in | |
487 // the frames buffer and the num_frames field. | |
488 // | |
489 // Arguments: | |
490 // | |
491 // trace - trace data structure to be filled by the VM. | |
492 // depth - depth of the call stack trace. | |
493 // ucontext - ucontext_t of the LWP | |
494 // | |
495 // ASGCT_CallTrace: | |
496 // typedef struct { | |
497 // JNIEnv *env_id; | |
498 // jint num_frames; | |
499 // ASGCT_CallFrame *frames; | |
500 // } ASGCT_CallTrace; | |
501 // | |
502 // Fields: | |
503 // env_id - ID of thread which executed this trace. | |
504 // num_frames - number of frames in the trace. | |
505 // (< 0 indicates the frame is not walkable). | |
506 // frames - the ASGCT_CallFrames that make up this trace. Callee followed by callers. | |
507 // | |
508 // ASGCT_CallFrame: | |
509 // typedef struct { | |
510 // jint lineno; | |
511 // jmethodID method_id; | |
512 // } ASGCT_CallFrame; | |
513 // | |
514 // Fields: | |
515 // 1) For Java frame (interpreted and compiled), | |
516 // lineno - bci of the method being executed or -1 if bci is not available | |
517 // method_id - jmethodID of the method being executed | |
518 // 2) For native method | |
519 // lineno - (-3) | |
520 // method_id - jmethodID of the method being executed | |
521 | |
522 extern "C" { | |
2191 | 523 JNIEXPORT |
0 | 524 void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) { |
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525 |
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526 // This is if'd out because we no longer use thread suspension. |
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527 // However if someone wanted to backport this to a 5.0 jvm then this |
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528 // code would be important. |
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529 #if 0 |
0 | 530 if (SafepointSynchronize::is_synchronizing()) { |
531 // The safepoint mechanism is trying to synchronize all the threads. | |
532 // Since this can involve thread suspension, it is not safe for us | |
533 // to be here. We can reduce the deadlock risk window by quickly | |
534 // returning to the SIGPROF handler. However, it is still possible | |
535 // for VMThread to catch us here or in the SIGPROF handler. If we | |
536 // are suspended while holding a resource and another thread blocks | |
537 // on that resource in the SIGPROF handler, then we will have a | |
538 // three-thread deadlock (VMThread, this thread, the other thread). | |
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539 trace->num_frames = ticks_safepoint; // -10 |
0 | 540 return; |
541 } | |
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542 #endif |
0 | 543 |
544 JavaThread* thread; | |
545 | |
546 if (trace->env_id == NULL || | |
547 (thread = JavaThread::thread_from_jni_environment(trace->env_id)) == NULL || | |
548 thread->is_exiting()) { | |
549 | |
550 // bad env_id, thread has exited or thread is exiting | |
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551 trace->num_frames = ticks_thread_exit; // -8 |
0 | 552 return; |
553 } | |
554 | |
555 if (thread->in_deopt_handler()) { | |
556 // thread is in the deoptimization handler so return no frames | |
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557 trace->num_frames = ticks_deopt; // -9 |
0 | 558 return; |
559 } | |
560 | |
561 assert(JavaThread::current() == thread, | |
562 "AsyncGetCallTrace must be called by the current interrupted thread"); | |
563 | |
564 if (!JvmtiExport::should_post_class_load()) { | |
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565 trace->num_frames = ticks_no_class_load; // -1 |
0 | 566 return; |
567 } | |
568 | |
569 if (Universe::heap()->is_gc_active()) { | |
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570 trace->num_frames = ticks_GC_active; // -2 |
0 | 571 return; |
572 } | |
573 | |
574 switch (thread->thread_state()) { | |
575 case _thread_new: | |
576 case _thread_uninitialized: | |
577 case _thread_new_trans: | |
578 // We found the thread on the threads list above, but it is too | |
579 // young to be useful so return that there are no Java frames. | |
580 trace->num_frames = 0; | |
581 break; | |
582 case _thread_in_native: | |
583 case _thread_in_native_trans: | |
584 case _thread_blocked: | |
585 case _thread_blocked_trans: | |
586 case _thread_in_vm: | |
587 case _thread_in_vm_trans: | |
588 { | |
589 frame fr; | |
590 | |
591 // param isInJava == false - indicate we aren't in Java code | |
592 if (!thread->pd_get_top_frame_for_signal_handler(&fr, ucontext, false)) { | |
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593 trace->num_frames = ticks_unknown_not_Java; // -3 unknown frame |
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594 } else { |
0 | 595 if (!thread->has_last_Java_frame()) { |
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596 trace->num_frames = 0; // No Java frames |
0 | 597 } else { |
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598 trace->num_frames = ticks_not_walkable_not_Java; // -4 non walkable frame by default |
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599 forte_fill_call_trace_given_top(thread, trace, depth, fr); |
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600 |
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601 // This assert would seem to be valid but it is not. |
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602 // It would be valid if we weren't possibly racing a gc |
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603 // thread. A gc thread can make a valid interpreted frame |
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604 // look invalid. It's a small window but it does happen. |
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605 // The assert is left here commented out as a reminder. |
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606 // assert(trace->num_frames != ticks_not_walkable_not_Java, "should always be walkable"); |
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607 |
0 | 608 } |
609 } | |
610 } | |
611 break; | |
612 case _thread_in_Java: | |
613 case _thread_in_Java_trans: | |
614 { | |
615 frame fr; | |
616 | |
617 // param isInJava == true - indicate we are in Java code | |
618 if (!thread->pd_get_top_frame_for_signal_handler(&fr, ucontext, true)) { | |
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619 trace->num_frames = ticks_unknown_Java; // -5 unknown frame |
0 | 620 } else { |
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621 trace->num_frames = ticks_not_walkable_Java; // -6, non walkable frame by default |
0 | 622 forte_fill_call_trace_given_top(thread, trace, depth, fr); |
623 } | |
624 } | |
625 break; | |
626 default: | |
627 // Unknown thread state | |
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628 trace->num_frames = ticks_unknown_state; // -7 |
0 | 629 break; |
630 } | |
631 } | |
632 | |
633 | |
634 #ifndef _WINDOWS | |
635 // Support for the Forte(TM) Peformance Tools collector. | |
636 // | |
637 // The method prototype is derived from libcollector.h. For more | |
638 // information, please see the libcollect man page. | |
639 | |
640 // Method to let libcollector know about a dynamically loaded function. | |
641 // Because it is weakly bound, the calls become NOP's when the library | |
642 // isn't present. | |
643 void collector_func_load(char* name, | |
644 void* null_argument_1, | |
645 void* null_argument_2, | |
646 void *vaddr, | |
647 int size, | |
648 int zero_argument, | |
649 void* null_argument_3); | |
650 #pragma weak collector_func_load | |
651 #define collector_func_load(x0,x1,x2,x3,x4,x5,x6) \ | |
652 ( collector_func_load ? collector_func_load(x0,x1,x2,x3,x4,x5,x6),0 : 0 ) | |
653 #endif // !_WINDOWS | |
654 | |
655 } // end extern "C" | |
656 #endif // !IA64 | |
657 | |
658 void Forte::register_stub(const char* name, address start, address end) { | |
659 #if !defined(_WINDOWS) && !defined(IA64) | |
660 assert(pointer_delta(end, start, sizeof(jbyte)) < INT_MAX, | |
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6888953: some calls to function-like macros are missing semicolons
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661 "Code size exceeds maximum range"); |
0 | 662 |
663 collector_func_load((char*)name, NULL, NULL, start, | |
664 pointer_delta(end, start, sizeof(jbyte)), 0, NULL); | |
665 #endif // !_WINDOWS && !IA64 | |
666 } |