Mercurial > hg > truffle
annotate src/share/vm/interpreter/bytecodeTracer.cpp @ 734:3672e1dac765
6834142: method->print_codes(): Error: ShouldNotReachHere()
Summary: Restore the call to Bytecodes::java_code() in BytecodePrinter::print_attributes().
Reviewed-by: jrose
| author | kvn |
|---|---|
| date | Mon, 27 Apr 2009 12:45:14 -0700 |
| parents | be93aad57795 |
| children | bd02caa94611 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. | |
| 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/_bytecodeTracer.cpp.incl" | |
| 27 | |
| 28 | |
| 29 #ifndef PRODUCT | |
| 30 | |
| 31 // Standard closure for BytecodeTracer: prints the current bytecode | |
| 32 // and its attributes using bytecode-specific information. | |
| 33 | |
| 34 class BytecodePrinter: public BytecodeClosure { | |
| 35 private: | |
| 36 // %%% This field is not GC-ed, and so can contain garbage | |
| 37 // between critical sections. Use only pointer-comparison | |
| 38 // operations on the pointer, except within a critical section. | |
| 39 // (Also, ensure that occasional false positives are benign.) | |
| 40 methodOop _current_method; | |
| 41 bool _is_wide; | |
| 42 address _next_pc; // current decoding position | |
| 43 | |
| 44 void align() { _next_pc = (address)round_to((intptr_t)_next_pc, sizeof(jint)); } | |
| 45 int get_byte() { return *(jbyte*) _next_pc++; } // signed | |
| 46 short get_short() { short i=Bytes::get_Java_u2(_next_pc); _next_pc+=2; return i; } | |
| 47 int get_int() { int i=Bytes::get_Java_u4(_next_pc); _next_pc+=4; return i; } | |
| 48 | |
| 49 int get_index() { return *(address)_next_pc++; } | |
| 50 int get_big_index() { int i=Bytes::get_Java_u2(_next_pc); _next_pc+=2; return i; } | |
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51 int get_giant_index() { int i=Bytes::get_native_u4(_next_pc); _next_pc+=4; return i; } |
| 0 | 52 int get_index_special() { return (is_wide()) ? get_big_index() : get_index(); } |
| 53 methodOop method() { return _current_method; } | |
| 54 bool is_wide() { return _is_wide; } | |
| 55 | |
| 56 | |
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57 bool check_index(int i, bool in_cp_cache, int& cp_index, outputStream* st = tty); |
| 0 | 58 void print_constant(int i, outputStream* st = tty); |
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59 void print_field_or_method(int i, outputStream* st = tty); |
| 0 | 60 void print_attributes(Bytecodes::Code code, int bci, outputStream* st = tty); |
| 61 void bytecode_epilog(int bci, outputStream* st = tty); | |
| 62 | |
| 63 public: | |
| 64 BytecodePrinter() { | |
| 65 _is_wide = false; | |
| 66 } | |
| 67 | |
| 68 // This method is called while executing the raw bytecodes, so none of | |
| 69 // the adjustments that BytecodeStream performs applies. | |
| 70 void trace(methodHandle method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st) { | |
| 71 ResourceMark rm; | |
| 72 if (_current_method != method()) { | |
| 73 // Note 1: This code will not work as expected with true MT/MP. | |
| 74 // Need an explicit lock or a different solution. | |
| 75 // It is possible for this block to be skipped, if a garbage | |
| 76 // _current_method pointer happens to have the same bits as | |
| 77 // the incoming method. We could lose a line of trace output. | |
| 78 // This is acceptable in a debug-only feature. | |
| 79 st->cr(); | |
| 80 st->print("[%d] ", (int) Thread::current()->osthread()->thread_id()); | |
| 81 method->print_name(st); | |
| 82 st->cr(); | |
| 83 _current_method = method(); | |
| 84 } | |
| 85 Bytecodes::Code code; | |
| 86 if (is_wide()) { | |
| 87 // bcp wasn't advanced if previous bytecode was _wide. | |
| 88 code = Bytecodes::code_at(bcp+1); | |
| 89 } else { | |
| 90 code = Bytecodes::code_at(bcp); | |
| 91 } | |
| 92 int bci = bcp - method->code_base(); | |
| 93 st->print("[%d] ", (int) Thread::current()->osthread()->thread_id()); | |
| 94 if (Verbose) { | |
| 95 st->print("%8d %4d " INTPTR_FORMAT " " INTPTR_FORMAT " %s", | |
| 96 BytecodeCounter::counter_value(), bci, tos, tos2, Bytecodes::name(code)); | |
| 97 } else { | |
| 98 st->print("%8d %4d %s", | |
| 99 BytecodeCounter::counter_value(), bci, Bytecodes::name(code)); | |
| 100 } | |
| 101 _next_pc = is_wide() ? bcp+2 : bcp+1; | |
| 102 print_attributes(code, bci); | |
| 103 // Set is_wide for the next one, since the caller of this doesn't skip | |
| 104 // the next bytecode. | |
| 105 _is_wide = (code == Bytecodes::_wide); | |
| 106 } | |
| 107 | |
| 108 // Used for methodOop::print_codes(). The input bcp comes from | |
| 109 // BytecodeStream, which will skip wide bytecodes. | |
| 110 void trace(methodHandle method, address bcp, outputStream* st) { | |
| 111 _current_method = method(); | |
| 112 ResourceMark rm; | |
| 113 Bytecodes::Code code = Bytecodes::code_at(bcp); | |
| 114 // Set is_wide | |
| 115 _is_wide = (code == Bytecodes::_wide); | |
| 116 if (is_wide()) { | |
| 117 code = Bytecodes::code_at(bcp+1); | |
| 118 } | |
| 119 int bci = bcp - method->code_base(); | |
| 120 // Print bytecode index and name | |
| 121 if (is_wide()) { | |
| 122 st->print("%d %s_w", bci, Bytecodes::name(code)); | |
| 123 } else { | |
| 124 st->print("%d %s", bci, Bytecodes::name(code)); | |
| 125 } | |
| 126 _next_pc = is_wide() ? bcp+2 : bcp+1; | |
| 127 print_attributes(code, bci, st); | |
| 128 bytecode_epilog(bci, st); | |
| 129 } | |
| 130 }; | |
| 131 | |
| 132 | |
| 133 // Implementation of BytecodeTracer | |
| 134 | |
| 135 // %%% This set_closure thing seems overly general, given that | |
| 136 // nobody uses it. Also, if BytecodePrinter weren't hidden | |
| 137 // then methodOop could use instances of it directly and it | |
| 138 // would be easier to remove races on _current_method and bcp. | |
| 139 // Since this is not product functionality, we can defer cleanup. | |
| 140 | |
| 141 BytecodeClosure* BytecodeTracer::_closure = NULL; | |
| 142 | |
| 143 static BytecodePrinter std_closure; | |
| 144 BytecodeClosure* BytecodeTracer::std_closure() { | |
| 145 return &::std_closure; | |
| 146 } | |
| 147 | |
| 148 | |
| 149 void BytecodeTracer::trace(methodHandle method, address bcp, uintptr_t tos, uintptr_t tos2, outputStream* st) { | |
| 150 if (TraceBytecodes && BytecodeCounter::counter_value() >= TraceBytecodesAt) { | |
| 151 ttyLocker ttyl; // 5065316: keep the following output coherent | |
| 152 // The ttyLocker also prevents races between two threads | |
| 153 // trying to use the single instance of BytecodePrinter. | |
| 154 // Using the ttyLocker prevents the system from coming to | |
| 155 // a safepoint within this code, which is sensitive to methodOop | |
| 156 // movement. | |
| 157 // | |
| 158 // There used to be a leaf mutex here, but the ttyLocker will | |
| 159 // work just as well, as long as the printing operations never block. | |
| 160 // | |
| 161 // We put the locker on the static trace method, not the | |
| 162 // virtual one, because the clients of this module go through | |
| 163 // the static method. | |
| 164 _closure->trace(method, bcp, tos, tos2, st); | |
| 165 } | |
| 166 } | |
| 167 | |
| 168 void BytecodeTracer::trace(methodHandle method, address bcp, outputStream* st) { | |
| 169 ttyLocker ttyl; // 5065316: keep the following output coherent | |
| 170 _closure->trace(method, bcp, st); | |
| 171 } | |
| 172 | |
| 173 void print_oop(oop value, outputStream* st) { | |
| 174 if (value == NULL) { | |
| 175 st->print_cr(" NULL"); | |
| 176 } else { | |
| 177 EXCEPTION_MARK; | |
| 178 Handle h_value (THREAD, value); | |
| 179 symbolHandle sym = java_lang_String::as_symbol(h_value, CATCH); | |
| 180 if (sym->utf8_length() > 32) { | |
| 181 st->print_cr(" ...."); | |
| 182 } else { | |
| 183 sym->print_on(st); st->cr(); | |
| 184 } | |
| 185 } | |
| 186 } | |
| 187 | |
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188 bool BytecodePrinter::check_index(int i, bool in_cp_cache, int& cp_index, outputStream* st) { |
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189 constantPoolOop constants = method()->constants(); |
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190 int ilimit = constants->length(), climit = 0; |
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191 |
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192 constantPoolCacheOop cache = NULL; |
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193 if (in_cp_cache) { |
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194 cache = constants->cache(); |
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195 if (cache != NULL) { |
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196 //climit = cache->length(); // %%% private! |
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197 size_t size = cache->size() * HeapWordSize; |
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198 size -= sizeof(constantPoolCacheOopDesc); |
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199 size /= sizeof(ConstantPoolCacheEntry); |
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200 climit = (int) size; |
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201 } |
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202 } |
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203 |
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204 if (in_cp_cache && constantPoolCacheOopDesc::is_secondary_index(i)) { |
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205 i = constantPoolCacheOopDesc::decode_secondary_index(i); |
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206 st->print(" secondary cache[%d] of", i); |
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207 if (i >= 0 && i < climit) { |
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208 if (!cache->entry_at(i)->is_secondary_entry()) { |
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209 st->print_cr(" not secondary entry?", i); |
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210 return false; |
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211 } |
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212 i = cache->entry_at(i)->main_entry_index(); |
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213 goto check_cache_index; |
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214 } else { |
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215 st->print_cr(" not in cache[*]?", i); |
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216 return false; |
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217 } |
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218 } |
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219 |
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220 if (cache != NULL) { |
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221 i = Bytes::swap_u2(i); |
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222 if (WizardMode) st->print(" (swap=%d)", i); |
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223 goto check_cache_index; |
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224 } |
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225 |
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226 check_cp_index: |
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227 if (i >= 0 && i < ilimit) { |
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228 if (WizardMode) st->print(" cp[%d]", i); |
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229 cp_index = i; |
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230 return true; |
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231 } |
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232 |
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233 st->print_cr(" CP[%d] not in CP", i); |
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234 return false; |
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235 |
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236 check_cache_index: |
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237 if (i >= 0 && i < climit) { |
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238 if (cache->entry_at(i)->is_secondary_entry()) { |
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239 st->print_cr(" secondary entry?"); |
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240 return false; |
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241 } |
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242 i = cache->entry_at(i)->constant_pool_index(); |
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243 goto check_cp_index; |
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244 } |
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245 st->print_cr(" not in CP[*]?", i); |
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246 return false; |
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247 } |
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248 |
| 0 | 249 void BytecodePrinter::print_constant(int i, outputStream* st) { |
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250 int orig_i = i; |
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251 if (!check_index(orig_i, false, i, st)) return; |
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252 |
| 0 | 253 constantPoolOop constants = method()->constants(); |
| 254 constantTag tag = constants->tag_at(i); | |
| 255 | |
| 256 if (tag.is_int()) { | |
| 257 st->print_cr(" " INT32_FORMAT, constants->int_at(i)); | |
| 258 } else if (tag.is_long()) { | |
| 259 st->print_cr(" " INT64_FORMAT, constants->long_at(i)); | |
| 260 } else if (tag.is_float()) { | |
| 261 st->print_cr(" %f", constants->float_at(i)); | |
| 262 } else if (tag.is_double()) { | |
| 263 st->print_cr(" %f", constants->double_at(i)); | |
| 264 } else if (tag.is_string()) { | |
| 265 oop string = constants->resolved_string_at(i); | |
| 266 print_oop(string, st); | |
| 267 } else if (tag.is_unresolved_string()) { | |
| 268 st->print_cr(" <unresolved string at %d>", i); | |
| 269 } else if (tag.is_klass()) { | |
| 270 st->print_cr(" %s", constants->resolved_klass_at(i)->klass_part()->external_name()); | |
| 271 } else if (tag.is_unresolved_klass()) { | |
| 272 st->print_cr(" <unresolved klass at %d>", i); | |
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273 } else { |
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274 st->print_cr(" bad tag=%d at %d", tag.value(), i); |
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275 } |
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276 } |
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277 |
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278 void BytecodePrinter::print_field_or_method(int i, outputStream* st) { |
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279 int orig_i = i; |
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280 if (!check_index(orig_i, true, i, st)) return; |
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281 |
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282 constantPoolOop constants = method()->constants(); |
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283 constantTag tag = constants->tag_at(i); |
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284 |
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285 switch (tag.value()) { |
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286 case JVM_CONSTANT_InterfaceMethodref: |
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287 case JVM_CONSTANT_Methodref: |
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288 case JVM_CONSTANT_Fieldref: |
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289 break; |
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290 default: |
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291 st->print_cr(" bad tag=%d at %d", tag.value(), i); |
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292 return; |
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293 } |
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294 |
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295 symbolOop name = constants->name_ref_at(orig_i); |
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296 symbolOop signature = constants->signature_ref_at(orig_i); |
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297 st->print_cr(" %d <%s> <%s> ", i, name->as_C_string(), signature->as_C_string()); |
| 0 | 298 } |
| 299 | |
| 300 | |
| 301 void BytecodePrinter::print_attributes(Bytecodes::Code code, int bci, outputStream* st) { | |
| 302 // Show attributes of pre-rewritten codes | |
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303 code = Bytecodes::java_code(code); |
| 0 | 304 // If the code doesn't have any fields there's nothing to print. |
| 305 // note this is ==1 because the tableswitch and lookupswitch are | |
| 306 // zero size (for some reason) and we want to print stuff out for them. | |
| 307 if (Bytecodes::length_for(code) == 1) { | |
| 308 st->cr(); | |
| 309 return; | |
| 310 } | |
| 311 | |
| 312 switch(code) { | |
| 313 // Java specific bytecodes only matter. | |
| 314 case Bytecodes::_bipush: | |
| 315 st->print_cr(" " INT32_FORMAT, get_byte()); | |
| 316 break; | |
| 317 case Bytecodes::_sipush: | |
| 318 st->print_cr(" " INT32_FORMAT, get_short()); | |
| 319 break; | |
| 320 case Bytecodes::_ldc: | |
| 321 print_constant(get_index(), st); | |
| 322 break; | |
| 323 | |
| 324 case Bytecodes::_ldc_w: | |
| 325 case Bytecodes::_ldc2_w: | |
| 326 print_constant(get_big_index(), st); | |
| 327 break; | |
| 328 | |
| 329 case Bytecodes::_iload: | |
| 330 case Bytecodes::_lload: | |
| 331 case Bytecodes::_fload: | |
| 332 case Bytecodes::_dload: | |
| 333 case Bytecodes::_aload: | |
| 334 case Bytecodes::_istore: | |
| 335 case Bytecodes::_lstore: | |
| 336 case Bytecodes::_fstore: | |
| 337 case Bytecodes::_dstore: | |
| 338 case Bytecodes::_astore: | |
| 339 st->print_cr(" #%d", get_index_special()); | |
| 340 break; | |
| 341 | |
| 342 case Bytecodes::_iinc: | |
| 343 { int index = get_index_special(); | |
| 344 jint offset = is_wide() ? get_short(): get_byte(); | |
| 345 st->print_cr(" #%d " INT32_FORMAT, index, offset); | |
| 346 } | |
| 347 break; | |
| 348 | |
| 349 case Bytecodes::_newarray: { | |
| 350 BasicType atype = (BasicType)get_index(); | |
| 351 const char* str = type2name(atype); | |
| 352 if (str == NULL || atype == T_OBJECT || atype == T_ARRAY) { | |
| 353 assert(false, "Unidentified basic type"); | |
| 354 } | |
| 355 st->print_cr(" %s", str); | |
| 356 } | |
| 357 break; | |
| 358 case Bytecodes::_anewarray: { | |
| 359 int klass_index = get_big_index(); | |
| 360 constantPoolOop constants = method()->constants(); | |
| 361 symbolOop name = constants->klass_name_at(klass_index); | |
| 362 st->print_cr(" %s ", name->as_C_string()); | |
| 363 } | |
| 364 break; | |
| 365 case Bytecodes::_multianewarray: { | |
| 366 int klass_index = get_big_index(); | |
| 367 int nof_dims = get_index(); | |
| 368 constantPoolOop constants = method()->constants(); | |
| 369 symbolOop name = constants->klass_name_at(klass_index); | |
| 370 st->print_cr(" %s %d", name->as_C_string(), nof_dims); | |
| 371 } | |
| 372 break; | |
| 373 | |
| 374 case Bytecodes::_ifeq: | |
| 375 case Bytecodes::_ifnull: | |
| 376 case Bytecodes::_iflt: | |
| 377 case Bytecodes::_ifle: | |
| 378 case Bytecodes::_ifne: | |
| 379 case Bytecodes::_ifnonnull: | |
| 380 case Bytecodes::_ifgt: | |
| 381 case Bytecodes::_ifge: | |
| 382 case Bytecodes::_if_icmpeq: | |
| 383 case Bytecodes::_if_icmpne: | |
| 384 case Bytecodes::_if_icmplt: | |
| 385 case Bytecodes::_if_icmpgt: | |
| 386 case Bytecodes::_if_icmple: | |
| 387 case Bytecodes::_if_icmpge: | |
| 388 case Bytecodes::_if_acmpeq: | |
| 389 case Bytecodes::_if_acmpne: | |
| 390 case Bytecodes::_goto: | |
| 391 case Bytecodes::_jsr: | |
| 392 st->print_cr(" %d", bci + get_short()); | |
| 393 break; | |
| 394 | |
| 395 case Bytecodes::_goto_w: | |
| 396 case Bytecodes::_jsr_w: | |
| 397 st->print_cr(" %d", bci + get_int()); | |
| 398 break; | |
| 399 | |
| 400 case Bytecodes::_ret: st->print_cr(" %d", get_index_special()); break; | |
| 401 | |
| 402 case Bytecodes::_tableswitch: | |
| 403 { align(); | |
| 404 int default_dest = bci + get_int(); | |
| 405 int lo = get_int(); | |
| 406 int hi = get_int(); | |
| 407 int len = hi - lo + 1; | |
| 408 jint* dest = NEW_RESOURCE_ARRAY(jint, len); | |
| 409 for (int i = 0; i < len; i++) { | |
| 410 dest[i] = bci + get_int(); | |
| 411 } | |
| 412 st->print(" %d " INT32_FORMAT " " INT32_FORMAT " ", | |
| 413 default_dest, lo, hi); | |
| 414 int first = true; | |
| 415 for (int ll = lo; ll <= hi; ll++, first = false) { | |
| 416 int idx = ll - lo; | |
| 417 const char *format = first ? " %d:" INT32_FORMAT " (delta: %d)" : | |
| 418 ", %d:" INT32_FORMAT " (delta: %d)"; | |
| 419 st->print(format, ll, dest[idx], dest[idx]-bci); | |
| 420 } | |
| 421 st->cr(); | |
| 422 } | |
| 423 break; | |
| 424 case Bytecodes::_lookupswitch: | |
| 425 { align(); | |
| 426 int default_dest = bci + get_int(); | |
| 427 int len = get_int(); | |
| 428 jint* key = NEW_RESOURCE_ARRAY(jint, len); | |
| 429 jint* dest = NEW_RESOURCE_ARRAY(jint, len); | |
| 430 for (int i = 0; i < len; i++) { | |
| 431 key [i] = get_int(); | |
| 432 dest[i] = bci + get_int(); | |
| 433 }; | |
| 434 st->print(" %d %d ", default_dest, len); | |
| 435 bool first = true; | |
| 436 for (int ll = 0; ll < len; ll++, first = false) { | |
| 437 const char *format = first ? " " INT32_FORMAT ":" INT32_FORMAT : | |
| 438 ", " INT32_FORMAT ":" INT32_FORMAT ; | |
| 439 st->print(format, key[ll], dest[ll]); | |
| 440 } | |
| 441 st->cr(); | |
| 442 } | |
| 443 break; | |
| 444 | |
| 445 case Bytecodes::_putstatic: | |
| 446 case Bytecodes::_getstatic: | |
| 447 case Bytecodes::_putfield: | |
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448 case Bytecodes::_getfield: |
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449 print_field_or_method(get_big_index(), st); |
| 0 | 450 break; |
| 451 | |
| 452 case Bytecodes::_invokevirtual: | |
| 453 case Bytecodes::_invokespecial: | |
| 454 case Bytecodes::_invokestatic: | |
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455 print_field_or_method(get_big_index(), st); |
| 0 | 456 break; |
| 457 | |
| 458 case Bytecodes::_invokeinterface: | |
| 459 { int i = get_big_index(); | |
| 460 int n = get_index(); | |
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461 get_index(); // ignore zero byte |
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462 print_field_or_method(i, st); |
| 0 | 463 } |
| 464 break; | |
| 465 | |
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466 case Bytecodes::_invokedynamic: |
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467 print_field_or_method(get_giant_index(), st); |
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468 break; |
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469 |
| 0 | 470 case Bytecodes::_new: |
| 471 case Bytecodes::_checkcast: | |
| 472 case Bytecodes::_instanceof: | |
| 473 { int i = get_big_index(); | |
| 474 constantPoolOop constants = method()->constants(); | |
| 475 symbolOop name = constants->klass_name_at(i); | |
| 476 st->print_cr(" %d <%s>", i, name->as_C_string()); | |
| 477 } | |
| 478 break; | |
| 479 | |
| 480 case Bytecodes::_wide: | |
| 481 // length is zero not one, but printed with no more info. | |
| 482 break; | |
| 483 | |
| 484 default: | |
| 485 ShouldNotReachHere(); | |
| 486 break; | |
| 487 } | |
| 488 } | |
| 489 | |
| 490 | |
| 491 void BytecodePrinter::bytecode_epilog(int bci, outputStream* st) { | |
| 492 methodDataOop mdo = method()->method_data(); | |
| 493 if (mdo != NULL) { | |
| 494 ProfileData* data = mdo->bci_to_data(bci); | |
| 495 if (data != NULL) { | |
| 496 st->print(" %d", mdo->dp_to_di(data->dp())); | |
| 497 st->fill_to(6); | |
| 498 data->print_data_on(st); | |
| 499 } | |
| 500 } | |
| 501 } | |
| 502 #endif // PRODUCT |