jdk8-mips64-public/hotspot: src/share/vm/compiler/compileLog.cpp@da91efe96a93 (annotated)

src/share/vm/compiler/compileLog.cpp@da91efe96a93 (annotated)

src/share/vm/compiler/compileLog.cpp

Sat, 01 Sep 2012 13:25:18 -0400

author: coleenp
date: Sat, 01 Sep 2012 13:25:18 -0400
changeset 4037: da91efe96a93
parent 3900: d2a62e0f25eb
child 4111: 9191895df19d
permissions: -rw-r--r--

6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>

 /*
  * Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "ci/ciMethod.hpp"
 #include "compiler/compileLog.hpp"
 #include "memory/allocation.inline.hpp"
 #include "oops/method.hpp"
 #include "runtime/mutexLocker.hpp"
 #include "runtime/os.hpp"
 CompileLog* CompileLog::_first = NULL;
 // ------------------------------------------------------------------
 // CompileLog::CompileLog
 CompileLog::CompileLog(const char* file, FILE* fp, intx thread_id)
   : _context(_context_buffer, sizeof(_context_buffer))
 {
   initialize(new(ResourceObj::C_HEAP, mtCompiler) fileStream(fp));
   _file = file;
   _file_end = 0;
   _thread_id = thread_id;
   _identities_limit = 0;
   _identities_capacity = 400;
   _identities = NEW_C_HEAP_ARRAY(char, _identities_capacity, mtCompiler);
   // link into the global list
   { MutexLocker locker(CompileTaskAlloc_lock);
     _next = _first;
     _first = this;
   }
 }
 CompileLog::~CompileLog() {
   delete _out;
   _out = NULL;
   FREE_C_HEAP_ARRAY(char, _identities, mtCompiler);
 }
 // Advance kind up to a null or space, return this tail.
 // Make sure kind is null-terminated, not space-terminated.
 // Use the buffer if necessary.
 static const char* split_attrs(const char* &kind, char* buffer) {
   const char* attrs = strchr(kind, ' ');
   // Tease apart the first word from the rest:
   if (attrs == NULL) {
     return "";  // no attrs, no split
   } else if (kind == buffer) {
     ((char*) attrs)[-1] = 0;
     return attrs;
   } else {
     // park it in the buffer, so we can put a null on the end
     assert(!(kind >= buffer && kind < buffer+100), "not obviously in buffer");
     int klen = attrs - kind;
     strncpy(buffer, kind, klen);
     buffer[klen] = 0;
     kind = buffer;  // return by reference
     return attrs;
   }
 }
 // see_tag, pop_tag:  Override the default do-nothing methods on xmlStream.
 // These methods provide a hook for managing the the extra context markup.
 void CompileLog::see_tag(const char* tag, bool push) {
   if (_context.size() > 0 && _out != NULL) {
     _out->write(_context.base(), _context.size());
     _context.reset();
   }
   xmlStream::see_tag(tag, push);
 }
 void CompileLog::pop_tag(const char* tag) {
   _context.reset();  // toss any context info.
   xmlStream::pop_tag(tag);
 }
 // ------------------------------------------------------------------
 // CompileLog::identify
 int CompileLog::identify(ciBaseObject* obj) {
   if (obj == NULL)  return 0;
   int id = obj->ident();
   if (id < 0)  return id;
   // If it has already been identified, just return the id.
   if (id < _identities_limit && _identities[id] != 0)  return id;
   // Lengthen the array, if necessary.
   if (id >= _identities_capacity) {
     int new_cap = _identities_capacity * 2;
     if (new_cap <= id)  new_cap = id + 100;
     _identities = REALLOC_C_HEAP_ARRAY(char, _identities, new_cap, mtCompiler);
     _identities_capacity = new_cap;
   }
   while (id >= _identities_limit) {
     _identities[_identities_limit++] = 0;
   }
   assert(id < _identities_limit, "oob");
   // Mark this id as processed.
   // (Be sure to do this before any recursive calls to identify.)
   _identities[id] = 1;  // mark
   // Now, print the object's identity once, in detail.
   if (obj->is_metadata()) {
     ciMetadata* mobj = obj->as_metadata();
     if (mobj->is_klass()) {
       ciKlass* klass = mobj->as_klass();
     begin_elem("klass id='%d'", id);
     name(klass->name());
     if (!klass->is_loaded()) {
       print(" unloaded='1'");
     } else {
       print(" flags='%d'", klass->modifier_flags());
     }
     end_elem();
     } else if (mobj->is_method()) {
       ciMethod* method = mobj->as_method();
     ciSignature* sig = method->signature();
     // Pre-identify items that we will need!
     identify(sig->return_type());
     for (int i = 0; i < sig->count(); i++) {
       identify(sig->type_at(i));
     }
     begin_elem("method id='%d' holder='%d'",
                id, identify(method->holder()));
     name(method->name());
     print(" return='%d'", identify(sig->return_type()));
     if (sig->count() > 0) {
       print(" arguments='");
       for (int i = 0; i < sig->count(); i++) {
         print((i == 0) ? "%d" : " %d", identify(sig->type_at(i)));
       }
       print("'");
     }
     if (!method->is_loaded()) {
       print(" unloaded='1'");
     } else {
       print(" flags='%d'", (jchar) method->flags().as_int());
       // output a few metrics
       print(" bytes='%d'", method->code_size());
       method->log_nmethod_identity(this);
       //print(" count='%d'", method->invocation_count());
       //int bec = method->backedge_count();
       //if (bec != 0)  print(" backedge_count='%d'", bec);
       print(" iicount='%d'", method->interpreter_invocation_count());
     }
     end_elem();
     } else if (mobj->is_type()) {
       BasicType type = mobj->as_type()->basic_type();
       elem("type id='%d' name='%s'", id, type2name(type));
     } else {
       // Should not happen.
       elem("unknown id='%d'", id);
       ShouldNotReachHere();
     }
   } else if (obj->is_symbol()) {
     begin_elem("symbol id='%d'", id);
     name(obj->as_symbol());
     end_elem();
   } else {
     // Should not happen.
     elem("unknown id='%d'", id);
   }
   return id;
 }
 void CompileLog::name(ciSymbol* name) {
   if (name == NULL)  return;
   print(" name='");
   name->print_symbol_on(text());  // handles quoting conventions
   print("'");
 }
 // ------------------------------------------------------------------
 // CompileLog::clear_identities
 // Forget which identities have been printed.
 void CompileLog::clear_identities() {
   _identities_limit = 0;
 }
 // ------------------------------------------------------------------
 // CompileLog::finish_log_on_error
 //
 // Note: This function is called after fatal error, avoid unnecessary memory
 // or stack allocation, use only async-safe functions. It's possible JVM is
 // only partially initialized.
 void CompileLog::finish_log_on_error(outputStream* file, char* buf, int buflen) {
   static bool called_exit = false;
   if (called_exit)  return;
   called_exit = true;
   for (CompileLog* log = _first; log != NULL; log = log->_next) {
     log->flush();
     const char* partial_file = log->file();
     int partial_fd = open(partial_file, O_RDONLY);
     if (partial_fd != -1) {
       // print/print_cr may need to allocate large stack buffer to format
       // strings, here we use snprintf() and print_raw() instead.
       file->print_raw("<compilation_log thread='");
       jio_snprintf(buf, buflen, UINTX_FORMAT, log->thread_id());
       file->print_raw(buf);
       file->print_raw_cr("'>");
       size_t nr; // number read into buf from partial log
       // Copy data up to the end of the last <event> element:
       julong to_read = log->_file_end;
       while (to_read > 0) {
         if (to_read < (julong)buflen)
               nr = (size_t)to_read;
         else  nr = buflen;
         nr = read(partial_fd, buf, (int)nr);
         if (nr <= 0)  break;
         to_read -= (julong)nr;
         file->write(buf, nr);
       }
       // Copy any remaining data inside a quote:
       bool saw_slop = false;
       int end_cdata = 0;  // state machine [0..2] watching for too many "]]"
       while ((nr = read(partial_fd, buf, buflen)) > 0) {
         if (!saw_slop) {
           file->print_raw_cr("<fragment>");
           file->print_raw_cr("<![CDATA[");
           saw_slop = true;
         }
         // The rest of this loop amounts to a simple copy operation:
         // { file->write(buf, nr); }
         // However, it must sometimes output the buffer in parts,
         // in case there is a CDATA quote embedded in the fragment.
         const char* bufp;  // pointer into buf
         size_t nw; // number written in each pass of the following loop:
         for (bufp = buf; nr > 0; nr -= nw, bufp += nw) {
           // Write up to any problematic CDATA delimiter (usually all of nr).
           for (nw = 0; nw < nr; nw++) {
             // First, scan ahead into the buf, checking the state machine.
             switch (bufp[nw]) {
             case ']':
               if (end_cdata < 2)   end_cdata += 1;  // saturating counter
               continue;  // keep scanning
             case '>':
               if (end_cdata == 2)  break;  // found CDATA delimiter!
               // else fall through:
             default:
               end_cdata = 0;
               continue;  // keep scanning
             }
             // If we get here, nw is pointing at a bad '>'.
             // It is very rare for this to happen.
             // However, this code has been tested by introducing
             // CDATA sequences into the compilation log.
             break;
           }
           // Now nw is the number of characters to write, usually == nr.
           file->write(bufp, nw);
           if (nw < nr) {
             // We are about to go around the loop again.
             // But first, disrupt the ]]> by closing and reopening the quote.
             file->print_raw("]]><![CDATA[");
             end_cdata = 0;  // reset state machine
           }
         }
       }
       if (saw_slop) {
         file->print_raw_cr("]]>");
         file->print_raw_cr("</fragment>");
       }
       file->print_raw_cr("</compilation_log>");
       close(partial_fd);
       unlink(partial_file);
     }
   }
 }
 // ------------------------------------------------------------------
 // CompileLog::finish_log
 //
 // Called during normal shutdown. For now, any clean-up needed in normal
 // shutdown is also needed in VM abort, so is covered by finish_log_on_error().
 // Just allocate a buffer and call finish_log_on_error().
 void CompileLog::finish_log(outputStream* file) {
   char buf[4 * K];
   finish_log_on_error(file, buf, sizeof(buf));
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/compiler/compileLog.cpp@da91efe96a93 (annotated)

src/share/vm/compiler/compileLog.cpp