Mercurial > hg > truffle
annotate src/share/vm/prims/forte.cpp @ 409:218f0fd3ca88
Merge
author | acorn |
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date | Wed, 22 Oct 2008 15:07:23 -0400 |
parents | d1605aabd0a1 |
children | 547cbe6dacc5 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 2003-2008 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_forte.cpp.incl" | |
27 | |
107
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28 // These name match the names reported by the forte quality kit |
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29 enum { |
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30 ticks_no_Java_frame = 0, |
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31 ticks_no_class_load = -1, |
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32 ticks_GC_active = -2, |
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33 ticks_unknown_not_Java = -3, |
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34 ticks_not_walkable_not_Java = -4, |
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35 ticks_unknown_Java = -5, |
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36 ticks_not_walkable_Java = -6, |
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37 ticks_unknown_state = -7, |
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38 ticks_thread_exit = -8, |
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39 ticks_deopt = -9, |
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40 ticks_safepoint = -10 |
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41 }; |
0 | 42 |
43 //------------------------------------------------------- | |
44 | |
45 // Native interfaces for use by Forte tools. | |
46 | |
47 | |
48 #ifndef IA64 | |
49 | |
50 class vframeStreamForte : public vframeStreamCommon { | |
51 public: | |
52 // constructor that starts with sender of frame fr (top_frame) | |
53 vframeStreamForte(JavaThread *jt, frame fr, bool stop_at_java_call_stub); | |
54 void forte_next(); | |
55 }; | |
56 | |
57 | |
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58 static void is_decipherable_compiled_frame(frame* fr, RegisterMap* map, |
0 | 59 bool* is_compiled_p, bool* is_walkable_p); |
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60 static bool is_decipherable_interpreted_frame(JavaThread* thread, |
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61 frame* fr, |
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62 methodOop* method_p, |
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63 int* bci_p); |
0 | 64 |
65 | |
66 | |
67 | |
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68 vframeStreamForte::vframeStreamForte(JavaThread *jt, |
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69 frame fr, |
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70 bool stop_at_java_call_stub) : vframeStreamCommon(jt) { |
0 | 71 |
72 _stop_at_java_call_stub = stop_at_java_call_stub; | |
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73 _frame = fr; |
0 | 74 |
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75 // We must always have a valid frame to start filling |
0 | 76 |
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77 bool filled_in = fill_from_frame(); |
0 | 78 |
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79 assert(filled_in, "invariant"); |
0 | 80 |
81 } | |
82 | |
83 | |
84 // Solaris SPARC Compiler1 needs an additional check on the grandparent | |
85 // of the top_frame when the parent of the top_frame is interpreted and | |
86 // the grandparent is compiled. However, in this method we do not know | |
87 // the relationship of the current _frame relative to the top_frame so | |
88 // we implement a more broad sanity check. When the previous callee is | |
89 // interpreted and the current sender is compiled, we verify that the | |
90 // current sender is also walkable. If it is not walkable, then we mark | |
91 // the current vframeStream as at the end. | |
92 void vframeStreamForte::forte_next() { | |
93 // handle frames with inlining | |
94 if (_mode == compiled_mode && | |
95 vframeStreamCommon::fill_in_compiled_inlined_sender()) { | |
96 return; | |
97 } | |
98 | |
99 // handle general case | |
100 | |
101 int loop_count = 0; | |
102 int loop_max = MaxJavaStackTraceDepth * 2; | |
103 | |
104 | |
105 do { | |
106 | |
107
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107 loop_count++; |
0 | 108 |
107
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109 // By the time we get here we should never see unsafe but better |
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110 // safe then segv'd |
0 | 111 |
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112 if (loop_count > loop_max || !_frame.safe_for_sender(_thread)) { |
0 | 113 _mode = at_end_mode; |
114 return; | |
115 } | |
116 | |
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117 _frame = _frame.sender(&_reg_map); |
0 | 118 |
119 } while (!fill_from_frame()); | |
120 } | |
121 | |
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122 // Determine if 'fr' is a decipherable compiled frame. We are already |
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123 // assured that fr is for a java nmethod. |
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124 |
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125 static bool is_decipherable_compiled_frame(frame* fr) { |
0 | 126 |
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127 assert(fr->cb() != NULL && fr->cb()->is_nmethod(), "invariant"); |
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128 nmethod* nm = (nmethod*) fr->cb(); |
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129 assert(nm->is_java_method(), "invariant"); |
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130 |
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131 // First try and find an exact PcDesc |
0 | 132 |
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133 PcDesc* pc_desc = nm->pc_desc_at(fr->pc()); |
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134 |
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135 // Did we find a useful PcDesc? |
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136 if (pc_desc != NULL && |
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137 pc_desc->scope_decode_offset() == DebugInformationRecorder::serialized_null) { |
0 | 138 |
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139 address probe_pc = fr->pc() + 1; |
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140 pc_desc = nm->pc_desc_near(probe_pc); |
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141 |
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142 // Now do we have a useful PcDesc? |
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143 |
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144 if (pc_desc != NULL && |
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145 pc_desc->scope_decode_offset() == DebugInformationRecorder::serialized_null) { |
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146 // No debug information available for this pc |
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147 // vframeStream would explode if we try and walk the frames. |
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148 return false; |
0 | 149 } |
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150 |
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151 // This PcDesc is useful however we must adjust the frame's pc |
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152 // so that the vframeStream lookups will use this same pc |
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153 |
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154 fr->set_pc(pc_desc->real_pc(nm)); |
0 | 155 } |
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156 |
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157 return true; |
0 | 158 } |
159 | |
160 // Determine if 'fr' is a walkable interpreted frame. Returns false | |
161 // if it is not. *method_p, and *bci_p are not set when false is | |
162 // returned. *method_p is non-NULL if frame was executing a Java | |
163 // method. *bci_p is != -1 if a valid BCI in the Java method could | |
164 // be found. | |
165 // Note: this method returns true when a valid Java method is found | |
166 // even if a valid BCI cannot be found. | |
167 | |
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168 static bool is_decipherable_interpreted_frame(JavaThread* thread, |
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169 frame* fr, |
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170 methodOop* method_p, |
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171 int* bci_p) { |
0 | 172 assert(fr->is_interpreted_frame(), "just checking"); |
173 | |
174 // top frame is an interpreted frame | |
175 // check if it is walkable (i.e. valid methodOop and valid bci) | |
107
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176 |
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177 // Because we may be racing a gc thread the method and/or bci |
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178 // of a valid interpreter frame may look bad causing us to |
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179 // fail the is_interpreted_frame_valid test. If the thread |
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180 // is in any of the following states we are assured that the |
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181 // frame is in fact valid and we must have hit the race. |
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182 |
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183 JavaThreadState state = thread->thread_state(); |
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184 bool known_valid = (state == _thread_in_native || |
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185 state == _thread_in_vm || |
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186 state == _thread_blocked ); |
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187 |
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188 if (known_valid || fr->is_interpreted_frame_valid(thread)) { |
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189 |
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190 // The frame code should completely validate the frame so that |
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191 // references to methodOop and bci are completely safe to access |
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192 // If they aren't the frame code should be fixed not this |
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193 // code. However since gc isn't locked out the values could be |
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194 // stale. This is a race we can never completely win since we can't |
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195 // lock out gc so do one last check after retrieving their values |
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196 // from the frame for additional safety |
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197 |
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198 methodOop method = fr->interpreter_frame_method(); |
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199 |
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200 // We've at least found a method. |
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201 // NOTE: there is something to be said for the approach that |
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202 // if we don't find a valid bci then the method is not likely |
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203 // a valid method. Then again we may have caught an interpreter |
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204 // frame in the middle of construction and the bci field is |
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205 // not yet valid. |
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206 |
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207 *method_p = method; |
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208 |
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209 // See if gc may have invalidated method since we validated frame |
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210 |
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211 if (!Universe::heap()->is_valid_method(method)) return false; |
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212 |
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213 intptr_t bcx = fr->interpreter_frame_bcx(); |
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214 |
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215 int bci = method->validate_bci_from_bcx(bcx); |
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216 |
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217 // note: bci is set to -1 if not a valid bci |
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218 *bci_p = bci; |
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219 return true; |
0 | 220 } |
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221 |
0 | 222 return false; |
223 } | |
224 | |
225 | |
107
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226 // Determine if 'fr' can be used to find an initial Java frame. |
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227 // Return false if it can not find a fully decipherable Java frame |
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228 // (in other words a frame that isn't safe to use in a vframe stream). |
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229 // Obviously if it can't even find a Java frame false will also be returned. |
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230 // |
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231 // If we find a Java frame decipherable or not then by definition we have |
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232 // identified a method and that will be returned to the caller via method_p. |
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233 // If we can determine a bci that is returned also. (Hmm is it possible |
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234 // to return a method and bci and still return false? ) |
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235 // |
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236 // The initial Java frame we find (if any) is return via initial_frame_p. |
0 | 237 // |
107
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238 |
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239 static bool find_initial_Java_frame(JavaThread* thread, |
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240 frame* fr, |
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241 frame* initial_frame_p, |
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242 methodOop* method_p, |
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243 int* bci_p) { |
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244 |
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245 // It is possible that for a frame containing an nmethod |
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246 // we can capture the method but no bci. If we get no |
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247 // bci the frame isn't walkable but the method is usable. |
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248 // Therefore we init the returned methodOop to NULL so the |
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249 // caller can make the distinction. |
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250 |
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251 *method_p = NULL; |
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252 |
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253 // On the initial call to this method the frame we get may not be |
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254 // recognizable to us. This should only happen if we are in a JRT_LEAF |
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255 // or something called by a JRT_LEAF method. |
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256 |
0 | 257 |
107
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258 |
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259 frame candidate = *fr; |
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260 |
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261 // If the starting frame we were given has no codeBlob associated with |
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262 // it see if we can find such a frame because only frames with codeBlobs |
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263 // are possible Java frames. |
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264 |
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265 if (fr->cb() == NULL) { |
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266 |
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267 // See if we can find a useful frame |
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268 int loop_count; |
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269 int loop_max = MaxJavaStackTraceDepth * 2; |
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270 RegisterMap map(thread, false); |
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271 |
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272 for (loop_count = 0; loop_count < loop_max; loop_count++) { |
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273 if (!candidate.safe_for_sender(thread)) return false; |
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274 candidate = candidate.sender(&map); |
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275 if (candidate.cb() != NULL) break; |
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276 } |
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277 if (candidate.cb() == NULL) return false; |
0 | 278 } |
279 | |
107
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280 // We have a frame known to be in the codeCache |
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281 // We will hopefully be able to figure out something to do with it. |
0 | 282 int loop_count; |
283 int loop_max = MaxJavaStackTraceDepth * 2; | |
107
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284 RegisterMap map(thread, false); |
0 | 285 |
286 for (loop_count = 0; loop_count < loop_max; loop_count++) { | |
287 | |
107
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288 if (candidate.is_first_frame()) { |
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289 // If initial frame is frame from StubGenerator and there is no |
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290 // previous anchor, there are no java frames associated with a method |
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291 return false; |
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292 } |
0 | 293 |
107
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294 if (candidate.is_interpreted_frame()) { |
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295 if (is_decipherable_interpreted_frame(thread, &candidate, method_p, bci_p)) { |
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296 *initial_frame_p = candidate; |
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297 return true; |
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298 } |
0 | 299 |
107
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300 // Hopefully we got some data |
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301 return false; |
0 | 302 } |
303 | |
107
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304 if (candidate.cb()->is_nmethod()) { |
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305 |
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306 nmethod* nm = (nmethod*) candidate.cb(); |
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307 *method_p = nm->method(); |
0 | 308 |
107
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309 // If the frame isn't fully decipherable then the default |
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310 // value for the bci is a signal that we don't have a bci. |
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311 // If we have a decipherable frame this bci value will |
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312 // not be used. |
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313 |
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314 *bci_p = -1; |
0 | 315 |
107
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316 *initial_frame_p = candidate; |
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317 |
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318 // Native wrapper code is trivial to decode by vframeStream |
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319 |
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320 if (nm->is_native_method()) return true; |
0 | 321 |
107
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322 // If it isn't decipherable then we have found a pc that doesn't |
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323 // have a PCDesc that can get us a bci however we did find |
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324 // a method |
0 | 325 |
107
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326 if (!is_decipherable_compiled_frame(&candidate)) { |
0 | 327 return false; |
107
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328 } |
0 | 329 |
107
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330 // is_decipherable_compiled_frame may modify candidate's pc |
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331 *initial_frame_p = candidate; |
0 | 332 |
107
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333 return true; |
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334 } |
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335 |
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336 // Must be some stub frame that we don't care about |
0 | 337 |
107
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338 if (!candidate.safe_for_sender(thread)) return false; |
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339 candidate = candidate.sender(&map); |
0 | 340 |
107
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341 // If it isn't in the code cache something is wrong |
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342 // since once we find a frame in the code cache they |
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343 // all should be there. |
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344 |
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345 if (candidate.cb() == NULL) return false; |
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346 |
0 | 347 } |
348 | |
107
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349 return false; |
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350 |
0 | 351 } |
352 | |
353 | |
354 // call frame copied from old .h file and renamed | |
355 typedef struct { | |
356 jint lineno; // line number in the source file | |
357 jmethodID method_id; // method executed in this frame | |
358 } ASGCT_CallFrame; | |
359 | |
360 // call trace copied from old .h file and renamed | |
361 typedef struct { | |
362 JNIEnv *env_id; // Env where trace was recorded | |
363 jint num_frames; // number of frames in this trace | |
364 ASGCT_CallFrame *frames; // frames | |
365 } ASGCT_CallTrace; | |
366 | |
367 static void forte_fill_call_trace_given_top(JavaThread* thd, | |
107
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368 ASGCT_CallTrace* trace, |
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369 int depth, |
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370 frame top_frame) { |
0 | 371 NoHandleMark nhm; |
372 | |
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373 frame initial_Java_frame; |
0 | 374 methodOop method; |
375 int bci; | |
376 int count; | |
377 | |
378 count = 0; | |
379 assert(trace->frames != NULL, "trace->frames must be non-NULL"); | |
380 | |
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381 bool fully_decipherable = find_initial_Java_frame(thd, &top_frame, &initial_Java_frame, &method, &bci); |
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382 |
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383 // The frame might not be walkable but still recovered a method |
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384 // (e.g. an nmethod with no scope info for the pc |
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385 |
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386 if (method == NULL) return; |
0 | 387 |
388 CollectedHeap* ch = Universe::heap(); | |
389 | |
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390 // The method is not stored GC safe so see if GC became active |
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391 // after we entered AsyncGetCallTrace() and before we try to |
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392 // use the methodOop. |
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393 // Yes, there is still a window after this check and before |
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394 // we use methodOop below, but we can't lock out GC so that |
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395 // has to be an acceptable risk. |
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396 if (!ch->is_valid_method(method)) { |
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397 trace->num_frames = ticks_GC_active; // -2 |
0 | 398 return; |
399 } | |
400 | |
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401 // We got a Java frame however it isn't fully decipherable |
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402 // so it won't necessarily be safe to use it for the |
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403 // initial frame in the vframe stream. |
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404 |
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405 if (!fully_decipherable) { |
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406 // Take whatever method the top-frame decoder managed to scrape up. |
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407 // We look further at the top frame only if non-safepoint |
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408 // debugging information is available. |
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409 count++; |
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410 trace->num_frames = count; |
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411 trace->frames[0].method_id = method->find_jmethod_id_or_null(); |
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412 if (!method->is_native()) { |
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413 trace->frames[0].lineno = bci; |
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414 } else { |
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415 trace->frames[0].lineno = -3; |
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416 } |
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417 |
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418 if (!initial_Java_frame.safe_for_sender(thd)) return; |
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419 |
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420 RegisterMap map(thd, false); |
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421 initial_Java_frame = initial_Java_frame.sender(&map); |
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422 } |
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423 |
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424 vframeStreamForte st(thd, initial_Java_frame, false); |
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425 |
0 | 426 for (; !st.at_end() && count < depth; st.forte_next(), count++) { |
427 bci = st.bci(); | |
428 method = st.method(); | |
429 | |
430 // The method is not stored GC safe so see if GC became active | |
431 // after we entered AsyncGetCallTrace() and before we try to | |
432 // use the methodOop. | |
433 // Yes, there is still a window after this check and before | |
434 // we use methodOop below, but we can't lock out GC so that | |
435 // has to be an acceptable risk. | |
436 if (!ch->is_valid_method(method)) { | |
437 // we throw away everything we've gathered in this sample since | |
438 // none of it is safe | |
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439 trace->num_frames = ticks_GC_active; // -2 |
0 | 440 return; |
441 } | |
442 | |
443 trace->frames[count].method_id = method->find_jmethod_id_or_null(); | |
444 if (!method->is_native()) { | |
445 trace->frames[count].lineno = bci; | |
446 } else { | |
447 trace->frames[count].lineno = -3; | |
448 } | |
449 } | |
450 trace->num_frames = count; | |
451 return; | |
452 } | |
453 | |
454 | |
455 // Forte Analyzer AsyncGetCallTrace() entry point. Currently supported | |
456 // on Linux X86, Solaris SPARC and Solaris X86. | |
457 // | |
458 // Async-safe version of GetCallTrace being called from a signal handler | |
459 // when a LWP gets interrupted by SIGPROF but the stack traces are filled | |
460 // with different content (see below). | |
461 // | |
462 // This function must only be called when JVM/TI | |
463 // CLASS_LOAD events have been enabled since agent startup. The enabled | |
464 // event will cause the jmethodIDs to be allocated at class load time. | |
465 // The jmethodIDs cannot be allocated in a signal handler because locks | |
466 // cannot be grabbed in a signal handler safely. | |
467 // | |
468 // void (*AsyncGetCallTrace)(ASGCT_CallTrace *trace, jint depth, void* ucontext) | |
469 // | |
470 // Called by the profiler to obtain the current method call stack trace for | |
471 // a given thread. The thread is identified by the env_id field in the | |
472 // ASGCT_CallTrace structure. The profiler agent should allocate a ASGCT_CallTrace | |
473 // structure with enough memory for the requested stack depth. The VM fills in | |
474 // the frames buffer and the num_frames field. | |
475 // | |
476 // Arguments: | |
477 // | |
478 // trace - trace data structure to be filled by the VM. | |
479 // depth - depth of the call stack trace. | |
480 // ucontext - ucontext_t of the LWP | |
481 // | |
482 // ASGCT_CallTrace: | |
483 // typedef struct { | |
484 // JNIEnv *env_id; | |
485 // jint num_frames; | |
486 // ASGCT_CallFrame *frames; | |
487 // } ASGCT_CallTrace; | |
488 // | |
489 // Fields: | |
490 // env_id - ID of thread which executed this trace. | |
491 // num_frames - number of frames in the trace. | |
492 // (< 0 indicates the frame is not walkable). | |
493 // frames - the ASGCT_CallFrames that make up this trace. Callee followed by callers. | |
494 // | |
495 // ASGCT_CallFrame: | |
496 // typedef struct { | |
497 // jint lineno; | |
498 // jmethodID method_id; | |
499 // } ASGCT_CallFrame; | |
500 // | |
501 // Fields: | |
502 // 1) For Java frame (interpreted and compiled), | |
503 // lineno - bci of the method being executed or -1 if bci is not available | |
504 // method_id - jmethodID of the method being executed | |
505 // 2) For native method | |
506 // lineno - (-3) | |
507 // method_id - jmethodID of the method being executed | |
508 | |
509 extern "C" { | |
510 void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) { | |
107
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511 |
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512 // This is if'd out because we no longer use thread suspension. |
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513 // However if someone wanted to backport this to a 5.0 jvm then this |
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514 // code would be important. |
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515 #if 0 |
0 | 516 if (SafepointSynchronize::is_synchronizing()) { |
517 // The safepoint mechanism is trying to synchronize all the threads. | |
518 // Since this can involve thread suspension, it is not safe for us | |
519 // to be here. We can reduce the deadlock risk window by quickly | |
520 // returning to the SIGPROF handler. However, it is still possible | |
521 // for VMThread to catch us here or in the SIGPROF handler. If we | |
522 // are suspended while holding a resource and another thread blocks | |
523 // on that resource in the SIGPROF handler, then we will have a | |
524 // three-thread deadlock (VMThread, this thread, the other thread). | |
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525 trace->num_frames = ticks_safepoint; // -10 |
0 | 526 return; |
527 } | |
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528 #endif |
0 | 529 |
530 JavaThread* thread; | |
531 | |
532 if (trace->env_id == NULL || | |
533 (thread = JavaThread::thread_from_jni_environment(trace->env_id)) == NULL || | |
534 thread->is_exiting()) { | |
535 | |
536 // bad env_id, thread has exited or thread is exiting | |
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537 trace->num_frames = ticks_thread_exit; // -8 |
0 | 538 return; |
539 } | |
540 | |
541 if (thread->in_deopt_handler()) { | |
542 // thread is in the deoptimization handler so return no frames | |
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543 trace->num_frames = ticks_deopt; // -9 |
0 | 544 return; |
545 } | |
546 | |
547 assert(JavaThread::current() == thread, | |
548 "AsyncGetCallTrace must be called by the current interrupted thread"); | |
549 | |
550 if (!JvmtiExport::should_post_class_load()) { | |
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551 trace->num_frames = ticks_no_class_load; // -1 |
0 | 552 return; |
553 } | |
554 | |
555 if (Universe::heap()->is_gc_active()) { | |
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556 trace->num_frames = ticks_GC_active; // -2 |
0 | 557 return; |
558 } | |
559 | |
560 switch (thread->thread_state()) { | |
561 case _thread_new: | |
562 case _thread_uninitialized: | |
563 case _thread_new_trans: | |
564 // We found the thread on the threads list above, but it is too | |
565 // young to be useful so return that there are no Java frames. | |
566 trace->num_frames = 0; | |
567 break; | |
568 case _thread_in_native: | |
569 case _thread_in_native_trans: | |
570 case _thread_blocked: | |
571 case _thread_blocked_trans: | |
572 case _thread_in_vm: | |
573 case _thread_in_vm_trans: | |
574 { | |
575 frame fr; | |
576 | |
577 // param isInJava == false - indicate we aren't in Java code | |
578 if (!thread->pd_get_top_frame_for_signal_handler(&fr, ucontext, false)) { | |
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579 trace->num_frames = ticks_unknown_not_Java; // -3 unknown frame |
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580 } else { |
0 | 581 if (!thread->has_last_Java_frame()) { |
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582 trace->num_frames = 0; // No Java frames |
0 | 583 } else { |
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584 trace->num_frames = ticks_not_walkable_not_Java; // -4 non walkable frame by default |
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585 forte_fill_call_trace_given_top(thread, trace, depth, fr); |
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586 |
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587 // This assert would seem to be valid but it is not. |
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588 // It would be valid if we weren't possibly racing a gc |
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589 // thread. A gc thread can make a valid interpreted frame |
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590 // look invalid. It's a small window but it does happen. |
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591 // The assert is left here commented out as a reminder. |
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592 // assert(trace->num_frames != ticks_not_walkable_not_Java, "should always be walkable"); |
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593 |
0 | 594 } |
595 } | |
596 } | |
597 break; | |
598 case _thread_in_Java: | |
599 case _thread_in_Java_trans: | |
600 { | |
601 frame fr; | |
602 | |
603 // param isInJava == true - indicate we are in Java code | |
604 if (!thread->pd_get_top_frame_for_signal_handler(&fr, ucontext, true)) { | |
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605 trace->num_frames = ticks_unknown_Java; // -5 unknown frame |
0 | 606 } else { |
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607 trace->num_frames = ticks_not_walkable_Java; // -6, non walkable frame by default |
0 | 608 forte_fill_call_trace_given_top(thread, trace, depth, fr); |
609 } | |
610 } | |
611 break; | |
612 default: | |
613 // Unknown thread state | |
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614 trace->num_frames = ticks_unknown_state; // -7 |
0 | 615 break; |
616 } | |
617 } | |
618 | |
619 | |
620 #ifndef _WINDOWS | |
621 // Support for the Forte(TM) Peformance Tools collector. | |
622 // | |
623 // The method prototype is derived from libcollector.h. For more | |
624 // information, please see the libcollect man page. | |
625 | |
626 // Method to let libcollector know about a dynamically loaded function. | |
627 // Because it is weakly bound, the calls become NOP's when the library | |
628 // isn't present. | |
629 void collector_func_load(char* name, | |
630 void* null_argument_1, | |
631 void* null_argument_2, | |
632 void *vaddr, | |
633 int size, | |
634 int zero_argument, | |
635 void* null_argument_3); | |
636 #pragma weak collector_func_load | |
637 #define collector_func_load(x0,x1,x2,x3,x4,x5,x6) \ | |
638 ( collector_func_load ? collector_func_load(x0,x1,x2,x3,x4,x5,x6),0 : 0 ) | |
639 #endif // !_WINDOWS | |
640 | |
641 } // end extern "C" | |
642 #endif // !IA64 | |
643 | |
644 void Forte::register_stub(const char* name, address start, address end) { | |
645 #if !defined(_WINDOWS) && !defined(IA64) | |
646 assert(pointer_delta(end, start, sizeof(jbyte)) < INT_MAX, | |
647 "Code size exceeds maximum range") | |
648 | |
649 collector_func_load((char*)name, NULL, NULL, start, | |
650 pointer_delta(end, start, sizeof(jbyte)), 0, NULL); | |
651 #endif // !_WINDOWS && !IA64 | |
652 } |