src/share/vm/compiler/compileLog.cpp

Fri, 21 Jun 2013 15:56:24 -0700

author
kvn
date
Fri, 21 Jun 2013 15:56:24 -0700
changeset 6442
b5c8a61d7fa0
parent 5226
813f26e34135
child 6198
55fb97c4c58d
permissions
-rw-r--r--

Merge

     1 /*
     2  * Copyright (c) 2002, 2012, 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  */
    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"
    33 CompileLog* CompileLog::_first = NULL;
    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;
    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);
    50   // link into the global list
    51   { MutexLocker locker(CompileTaskAlloc_lock);
    52     _next = _first;
    53     _first = this;
    54   }
    55 }
    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 }
    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 }
    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
   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 }
   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 }
   175 // ------------------------------------------------------------------
   176 // CompileLog::clear_identities
   177 // Forget which identities have been printed.
   178 void CompileLog::clear_identities() {
   179   _identities_limit = 0;
   180 }
   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;
   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("'>");
   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       }
   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 }
   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 }
   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 }
   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 }
   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 }
   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 }

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