1 /* 2 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "ci/ciMethod.hpp" 27 #include "compiler/compileLog.hpp" 28 #include "memory/allocation.inline.hpp" 29 #include "oops/method.hpp" 30 #include "runtime/mutexLocker.hpp" 31 #include "runtime/os.hpp" 32 33 CompileLog* CompileLog::_first = NULL; 34 35 // ------------------------------------------------------------------ 36 // CompileLog::CompileLog 37 CompileLog::CompileLog(const char* file_name, FILE* fp, intx thread_id) 38 : _context(_context_buffer, sizeof(_context_buffer)) 39 { 40 initialize(new(ResourceObj::C_HEAP, mtCompiler) fileStream(fp, true)); 41 _file_end = 0; 42 _thread_id = thread_id; 43 44 _identities_limit = 0; 45 _identities_capacity = 400; 46 _identities = NEW_C_HEAP_ARRAY(char, _identities_capacity, mtCompiler); 47 _file = NEW_C_HEAP_ARRAY(char, strlen(file_name)+1, mtCompiler); 48 strcpy((char*)_file, file_name); 49 50 // link into the global list 51 { MutexLocker locker(CompileTaskAlloc_lock); 52 _next = _first; 53 _first = this; 54 } 55 } 56 57 CompileLog::~CompileLog() { 58 delete _out; 59 _out = NULL; 60 FREE_C_HEAP_ARRAY(char, _identities, mtCompiler); 61 FREE_C_HEAP_ARRAY(char, _file, mtCompiler); 62 } 63 64 65 // see_tag, pop_tag: Override the default do-nothing methods on xmlStream. 66 // These methods provide a hook for managing the the extra context markup. 67 void CompileLog::see_tag(const char* tag, bool push) { 68 if (_context.size() > 0 && _out != NULL) { 69 _out->write(_context.base(), _context.size()); 70 _context.reset(); 71 } 72 xmlStream::see_tag(tag, push); 73 } 74 void CompileLog::pop_tag(const char* tag) { 75 _context.reset(); // toss any context info. 76 xmlStream::pop_tag(tag); 77 } 78 79 80 // ------------------------------------------------------------------ 81 // CompileLog::identify 82 int CompileLog::identify(ciBaseObject* obj) { 83 if (obj == NULL) return 0; 84 int id = obj->ident(); 85 if (id < 0) return id; 86 // If it has already been identified, just return the id. 87 if (id < _identities_limit && _identities[id] != 0) return id; 88 // Lengthen the array, if necessary. 89 if (id >= _identities_capacity) { 90 int new_cap = _identities_capacity * 2; 91 if (new_cap <= id) new_cap = id + 100; 92 _identities = REALLOC_C_HEAP_ARRAY(char, _identities, new_cap, mtCompiler); 93 _identities_capacity = new_cap; 94 } 95 while (id >= _identities_limit) { 96 _identities[_identities_limit++] = 0; 97 } 98 assert(id < _identities_limit, "oob"); 99 // Mark this id as processed. 100 // (Be sure to do this before any recursive calls to identify.) 101 _identities[id] = 1; // mark 102 103 // Now, print the object's identity once, in detail. 104 if (obj->is_metadata()) { 105 ciMetadata* mobj = obj->as_metadata(); 106 if (mobj->is_klass()) { 107 ciKlass* klass = mobj->as_klass(); 108 begin_elem("klass id='%d'", id); 109 name(klass->name()); 110 if (!klass->is_loaded()) { 111 print(" unloaded='1'"); 112 } else { 113 print(" flags='%d'", klass->modifier_flags()); 114 } 115 end_elem(); 116 } else if (mobj->is_method()) { 117 ciMethod* method = mobj->as_method(); 118 ciSignature* sig = method->signature(); 119 // Pre-identify items that we will need! 120 identify(sig->return_type()); 121 for (int i = 0; i < sig->count(); i++) { 122 identify(sig->type_at(i)); 123 } 124 begin_elem("method id='%d' holder='%d'", 125 id, identify(method->holder())); 126 name(method->name()); 127 print(" return='%d'", identify(sig->return_type())); 128 if (sig->count() > 0) { 129 print(" arguments='"); 130 for (int i = 0; i < sig->count(); i++) { 131 print((i == 0) ? "%d" : " %d", identify(sig->type_at(i))); 132 } 133 print("'"); 134 } 135 if (!method->is_loaded()) { 136 print(" unloaded='1'"); 137 } else { 138 print(" flags='%d'", (jchar) method->flags().as_int()); 139 // output a few metrics 140 print(" bytes='%d'", method->code_size()); 141 method->log_nmethod_identity(this); 142 //print(" count='%d'", method->invocation_count()); 143 //int bec = method->backedge_count(); 144 //if (bec != 0) print(" backedge_count='%d'", bec); 145 print(" iicount='%d'", method->interpreter_invocation_count()); 146 } 147 end_elem(); 148 } else if (mobj->is_type()) { 149 BasicType type = mobj->as_type()->basic_type(); 150 elem("type id='%d' name='%s'", id, type2name(type)); 151 } else { 152 // Should not happen. 153 elem("unknown id='%d'", id); 154 ShouldNotReachHere(); 155 } 156 } else if (obj->is_symbol()) { 157 begin_elem("symbol id='%d'", id); 158 name(obj->as_symbol()); 159 end_elem(); 160 } else { 161 // Should not happen. 162 elem("unknown id='%d'", id); 163 } 164 return id; 165 } 166 167 void CompileLog::name(ciSymbol* name) { 168 if (name == NULL) return; 169 print(" name='"); 170 name->print_symbol_on(text()); // handles quoting conventions 171 print("'"); 172 } 173 174 175 // ------------------------------------------------------------------ 176 // CompileLog::clear_identities 177 // Forget which identities have been printed. 178 void CompileLog::clear_identities() { 179 _identities_limit = 0; 180 } 181 182 // ------------------------------------------------------------------ 183 // CompileLog::finish_log_on_error 184 // 185 // Note: This function is called after fatal error, avoid unnecessary memory 186 // or stack allocation, use only async-safe functions. It's possible JVM is 187 // only partially initialized. 188 void CompileLog::finish_log_on_error(outputStream* file, char* buf, int buflen) { 189 static bool called_exit = false; 190 if (called_exit) return; 191 called_exit = true; 192 193 CompileLog* log = _first; 194 while (log != NULL) { 195 log->flush(); 196 const char* partial_file = log->file(); 197 int partial_fd = open(partial_file, O_RDONLY); 198 if (partial_fd != -1) { 199 // print/print_cr may need to allocate large stack buffer to format 200 // strings, here we use snprintf() and print_raw() instead. 201 file->print_raw("<compilation_log thread='"); 202 jio_snprintf(buf, buflen, UINTX_FORMAT, log->thread_id()); 203 file->print_raw(buf); 204 file->print_raw_cr("'>"); 205 206 size_t nr; // number read into buf from partial log 207 // Copy data up to the end of the last <event> element: 208 julong to_read = log->_file_end; 209 while (to_read > 0) { 210 if (to_read < (julong)buflen) 211 nr = (size_t)to_read; 212 else nr = buflen; 213 nr = read(partial_fd, buf, (int)nr); 214 if (nr <= 0) break; 215 to_read -= (julong)nr; 216 file->write(buf, nr); 217 } 218 219 // Copy any remaining data inside a quote: 220 bool saw_slop = false; 221 int end_cdata = 0; // state machine [0..2] watching for too many "]]" 222 while ((nr = read(partial_fd, buf, buflen)) > 0) { 223 if (!saw_slop) { 224 file->print_raw_cr("<fragment>"); 225 file->print_raw_cr("<![CDATA["); 226 saw_slop = true; 227 } 228 // The rest of this loop amounts to a simple copy operation: 229 // { file->write(buf, nr); } 230 // However, it must sometimes output the buffer in parts, 231 // in case there is a CDATA quote embedded in the fragment. 232 const char* bufp; // pointer into buf 233 size_t nw; // number written in each pass of the following loop: 234 for (bufp = buf; nr > 0; nr -= nw, bufp += nw) { 235 // Write up to any problematic CDATA delimiter (usually all of nr). 236 for (nw = 0; nw < nr; nw++) { 237 // First, scan ahead into the buf, checking the state machine. 238 switch (bufp[nw]) { 239 case ']': 240 if (end_cdata < 2) end_cdata += 1; // saturating counter 241 continue; // keep scanning 242 case '>': 243 if (end_cdata == 2) break; // found CDATA delimiter! 244 // else fall through: 245 default: 246 end_cdata = 0; 247 continue; // keep scanning 248 } 249 // If we get here, nw is pointing at a bad '>'. 250 // It is very rare for this to happen. 251 // However, this code has been tested by introducing 252 // CDATA sequences into the compilation log. 253 break; 254 } 255 // Now nw is the number of characters to write, usually == nr. 256 file->write(bufp, nw); 257 if (nw < nr) { 258 // We are about to go around the loop again. 259 // But first, disrupt the ]]> by closing and reopening the quote. 260 file->print_raw("]]><![CDATA["); 261 end_cdata = 0; // reset state machine 262 } 263 } 264 } 265 if (saw_slop) { 266 file->print_raw_cr("]]>"); 267 file->print_raw_cr("</fragment>"); 268 } 269 file->print_raw_cr("</compilation_log>"); 270 close(partial_fd); 271 unlink(partial_file); 272 } 273 CompileLog* next_log = log->_next; 274 delete log; 275 log = next_log; 276 } 277 _first = NULL; 278 } 279 280 // ------------------------------------------------------------------ 281 // CompileLog::finish_log 282 // 283 // Called during normal shutdown. For now, any clean-up needed in normal 284 // shutdown is also needed in VM abort, so is covered by finish_log_on_error(). 285 // Just allocate a buffer and call finish_log_on_error(). 286 void CompileLog::finish_log(outputStream* file) { 287 char buf[4 * K]; 288 finish_log_on_error(file, buf, sizeof(buf)); 289 } 290 291 // ------------------------------------------------------------------ 292 // CompileLog::inline_success 293 // 294 // Print about successful method inlining. 295 void CompileLog::inline_success(const char* reason) { 296 begin_elem("inline_success reason='"); 297 text(reason); 298 end_elem("'"); 299 } 300 301 // ------------------------------------------------------------------ 302 // CompileLog::inline_fail 303 // 304 // Print about failed method inlining. 305 void CompileLog::inline_fail(const char* reason) { 306 begin_elem("inline_fail reason='"); 307 text(reason); 308 end_elem("'"); 309 } 310 311 // ------------------------------------------------------------------ 312 // CompileLog::set_context 313 // 314 // Set XML tag as an optional marker - it is printed only if 315 // there are other entries after until it is reset. 316 void CompileLog::set_context(const char* format, ...) { 317 va_list ap; 318 va_start(ap, format); 319 clear_context(); 320 _context.print("<"); 321 _context.vprint(format, ap); 322 _context.print_cr("/>"); 323 va_end(ap); 324 } 325 326 // ------------------------------------------------------------------ 327 // CompileLog::code_cache_state 328 // 329 // Print code cache state. 330 void CompileLog::code_cache_state() { 331 begin_elem("code_cache"); 332 CodeCache::log_state(this); 333 end_elem(""); 334 }