Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 2002, 2010, 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/methodOop.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) 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);

   // 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);

 }

 // 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(ciObject* 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);

     _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_klass()) {

     ciKlass* klass = obj->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 (obj->is_method()) {

     ciMethod* method = obj->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 (obj->is_symbol()) {

     begin_elem("symbol id='%d'", id);

     name(obj->as_symbol());

     end_elem();

   } else if (obj->is_null_object()) {

     elem("null_object id='%d'", id);

   } else if (obj->is_type()) {

     BasicType type = obj->as_type()->basic_type();

     elem("type id='%d' name='%s'", id, type2name(type));

   } 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));

 }