Mercurial > hg > truffle
annotate src/share/vm/prims/forte.cpp @ 4851:a42c07c38c47
7132515: Add dcmd to manage UnlockingCommercialFeature flag
Summary: Added dcmd to unlock or check status of UnlockingCommercialFeature flag
Reviewed-by: fparain, rottenha
author | dsamersoff |
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date | Wed, 25 Jan 2012 21:10:08 +0400 |
parents | f08d439fab8c |
children | da91efe96a93 |
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 | |
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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 | |
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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; |
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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) { |
525 JavaThread* thread; | |
526 | |
527 if (trace->env_id == NULL || | |
528 (thread = JavaThread::thread_from_jni_environment(trace->env_id)) == NULL || | |
529 thread->is_exiting()) { | |
530 | |
531 // bad env_id, thread has exited or thread is exiting | |
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532 trace->num_frames = ticks_thread_exit; // -8 |
0 | 533 return; |
534 } | |
535 | |
536 if (thread->in_deopt_handler()) { | |
537 // thread is in the deoptimization handler so return no frames | |
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538 trace->num_frames = ticks_deopt; // -9 |
0 | 539 return; |
540 } | |
541 | |
542 assert(JavaThread::current() == thread, | |
543 "AsyncGetCallTrace must be called by the current interrupted thread"); | |
544 | |
545 if (!JvmtiExport::should_post_class_load()) { | |
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546 trace->num_frames = ticks_no_class_load; // -1 |
0 | 547 return; |
548 } | |
549 | |
550 if (Universe::heap()->is_gc_active()) { | |
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551 trace->num_frames = ticks_GC_active; // -2 |
0 | 552 return; |
553 } | |
554 | |
555 switch (thread->thread_state()) { | |
556 case _thread_new: | |
557 case _thread_uninitialized: | |
558 case _thread_new_trans: | |
559 // We found the thread on the threads list above, but it is too | |
560 // young to be useful so return that there are no Java frames. | |
561 trace->num_frames = 0; | |
562 break; | |
563 case _thread_in_native: | |
564 case _thread_in_native_trans: | |
565 case _thread_blocked: | |
566 case _thread_blocked_trans: | |
567 case _thread_in_vm: | |
568 case _thread_in_vm_trans: | |
569 { | |
570 frame fr; | |
571 | |
572 // param isInJava == false - indicate we aren't in Java code | |
573 if (!thread->pd_get_top_frame_for_signal_handler(&fr, ucontext, false)) { | |
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574 trace->num_frames = ticks_unknown_not_Java; // -3 unknown frame |
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575 } else { |
0 | 576 if (!thread->has_last_Java_frame()) { |
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577 trace->num_frames = 0; // No Java frames |
0 | 578 } else { |
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579 trace->num_frames = ticks_not_walkable_not_Java; // -4 non walkable frame by default |
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580 forte_fill_call_trace_given_top(thread, trace, depth, fr); |
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581 |
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582 // This assert would seem to be valid but it is not. |
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583 // It would be valid if we weren't possibly racing a gc |
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584 // thread. A gc thread can make a valid interpreted frame |
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585 // look invalid. It's a small window but it does happen. |
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586 // The assert is left here commented out as a reminder. |
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587 // assert(trace->num_frames != ticks_not_walkable_not_Java, "should always be walkable"); |
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588 |
0 | 589 } |
590 } | |
591 } | |
592 break; | |
593 case _thread_in_Java: | |
594 case _thread_in_Java_trans: | |
595 { | |
596 frame fr; | |
597 | |
598 // param isInJava == true - indicate we are in Java code | |
599 if (!thread->pd_get_top_frame_for_signal_handler(&fr, ucontext, true)) { | |
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600 trace->num_frames = ticks_unknown_Java; // -5 unknown frame |
0 | 601 } else { |
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602 trace->num_frames = ticks_not_walkable_Java; // -6, non walkable frame by default |
0 | 603 forte_fill_call_trace_given_top(thread, trace, depth, fr); |
604 } | |
605 } | |
606 break; | |
607 default: | |
608 // Unknown thread state | |
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609 trace->num_frames = ticks_unknown_state; // -7 |
0 | 610 break; |
611 } | |
612 } | |
613 | |
614 | |
615 #ifndef _WINDOWS | |
616 // Support for the Forte(TM) Peformance Tools collector. | |
617 // | |
618 // The method prototype is derived from libcollector.h. For more | |
619 // information, please see the libcollect man page. | |
620 | |
621 // Method to let libcollector know about a dynamically loaded function. | |
622 // Because it is weakly bound, the calls become NOP's when the library | |
623 // isn't present. | |
3960 | 624 #ifdef __APPLE__ |
625 // XXXDARWIN: Link errors occur even when __attribute__((weak_import)) | |
626 // is added | |
627 #define collector_func_load(x0,x1,x2,x3,x4,x5,x6) (0) | |
628 #else | |
0 | 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 ) | |
3960 | 639 #endif // __APPLE__ |
0 | 640 #endif // !_WINDOWS |
641 | |
642 } // end extern "C" | |
643 #endif // !IA64 | |
644 | |
645 void Forte::register_stub(const char* name, address start, address end) { | |
646 #if !defined(_WINDOWS) && !defined(IA64) | |
647 assert(pointer_delta(end, start, sizeof(jbyte)) < INT_MAX, | |
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648 "Code size exceeds maximum range"); |
0 | 649 |
650 collector_func_load((char*)name, NULL, NULL, start, | |
651 pointer_delta(end, start, sizeof(jbyte)), 0, NULL); | |
652 #endif // !_WINDOWS && !IA64 | |
653 } |