jdk8-mips64-public/hotspot: src/share/vm/utilities/xmlstream.cpp@c96030fff130 (annotated)

src/share/vm/utilities/xmlstream.cpp@c96030fff130 (annotated)

src/share/vm/utilities/xmlstream.cpp

Thu, 20 Nov 2008 16:56:09 -0800

author: ysr
date: Thu, 20 Nov 2008 16:56:09 -0800
changeset 888: c96030fff130
parent 657: 2a1a77d3458f
child 1844: cff162798819
permissions: -rw-r--r--

6684579: SoftReference processing can be made more efficient
Summary: For current soft-ref clearing policies, we can decide at marking time if a soft-reference will definitely not be cleared, postponing the decision of whether it will definitely be cleared to the final reference processing phase. This can be especially beneficial in the case of concurrent collectors where the marking is usually concurrent but reference processing is usually not.
Reviewed-by: jmasa

 /*
  * Copyright 2002-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 #include "incls/_precompiled.incl"
 #include "incls/_xmlstream.cpp.incl"
 void xmlStream::initialize(outputStream* out) {
   _out = out;
   _last_flush = 0;
   _markup_state = BODY;
   _text_init._outer_xmlStream = this;
   _text = &_text_init;
 #ifdef ASSERT
   _element_depth = 0;
   int   init_len = 100;
   char* init_buf = NEW_C_HEAP_ARRAY(char, init_len);
   _element_close_stack_low  = init_buf;
   _element_close_stack_high = init_buf + init_len;
   _element_close_stack_ptr  = init_buf + init_len - 1;
   _element_close_stack_ptr[0] = '\0';
 #endif
   // Make sure each log uses the same base for time stamps.
   if (is_open()) {
     _out->time_stamp().update_to(1);
   }
 }
 #ifdef ASSERT
 xmlStream::~xmlStream() {
   FREE_C_HEAP_ARRAY(char, _element_close_stack_low);
 }
 #endif
 // Pass the given chars directly to _out.
 void xmlStream::write(const char* s, size_t len) {
   if (!is_open())  return;
   out()->write(s, len);
   update_position(s, len);
 }
 // Pass the given chars directly to _out, except that
 // we watch for special "<&>" chars.
 // This is suitable for either attribute text or for body text.
 // We don't fool with "<![CDATA[" quotes, just single-character entities.
 // This makes it easier for dumb tools to parse the output.
 void xmlStream::write_text(const char* s, size_t len) {
   if (!is_open())  return;
   size_t written = 0;
   // All normally printed material goes inside XML quotes.
   // This leaves the output free to include markup also.
   // Scan the string looking for inadvertant "<&>" chars
   for (size_t i = 0; i < len; i++) {
     char ch = s[i];
     // Escape special chars.
     const char* esc = NULL;
     switch (ch) {
       // These are important only in attrs, but we do them always:
     case '\'': esc = "&apos;"; break;
     case '"':  esc = "&quot;"; break;
     case '<':  esc = "&lt;";   break;
     case '&':  esc = "&amp;";  break;
       // This is a freebie.
     case '>':  esc = "&gt;";   break;
     }
     if (esc != NULL) {
       if (written < i) {
         out()->write(&s[written], i - written);
         written = i;
       }
       out()->print_raw(esc);
       written++;
     }
   }
   // Print the clean remainder.  Usually, it is all of s.
   if (written < len) {
     out()->write(&s[written], len - written);
   }
 }
 // ------------------------------------------------------------------
 // Outputs XML text, with special characters quoted.
 void xmlStream::text(const char* format, ...) {
   va_list ap;
   va_start(ap, format);
   va_text(format, ap);
   va_end(ap);
 }
 #define BUFLEN 2*K   /* max size of output of individual print methods */
 // ------------------------------------------------------------------
 void xmlStream::va_tag(bool push, const char* format, va_list ap) {
   assert_if_no_error(!inside_attrs(), "cannot print tag inside attrs");
   char buffer[BUFLEN];
   size_t len;
   const char* kind = do_vsnprintf(buffer, BUFLEN, format, ap, false, len);
   see_tag(kind, push);
   print_raw("<");
   write(kind, len);
   _markup_state = (push ? HEAD : ELEM);
 }
 #ifdef ASSERT
 /// Debugging goo to make sure element tags nest properly.
 // ------------------------------------------------------------------
 void xmlStream::see_tag(const char* tag, bool push) {
   assert_if_no_error(!inside_attrs(), "cannot start new element inside attrs");
   if (!push)  return;
   // tag goes up until either null or space:
   const char* tag_end = strchr(tag, ' ');
   size_t tag_len = (tag_end == NULL) ? strlen(tag) : tag_end - tag;
   assert(tag_len > 0, "tag must not be empty");
   // push the tag onto the stack, pulling down the pointer
   char* old_ptr  = _element_close_stack_ptr;
   char* old_low  = _element_close_stack_low;
   char* push_ptr = old_ptr - (tag_len+1);
   if (push_ptr < old_low) {
     int old_len = _element_close_stack_high - old_ptr;
     int new_len = old_len * 2;
     if (new_len < 100)  new_len = 100;
     char* new_low  = NEW_C_HEAP_ARRAY(char, new_len);
     char* new_high = new_low + new_len;
     char* new_ptr  = new_high - old_len;
     memcpy(new_ptr, old_ptr, old_len);
     _element_close_stack_high = new_high;
     _element_close_stack_low  = new_low;
     _element_close_stack_ptr  = new_ptr;
     FREE_C_HEAP_ARRAY(char, old_low);
     push_ptr = new_ptr - (tag_len+1);
   }
   assert(push_ptr >= _element_close_stack_low, "in range");
   memcpy(push_ptr, tag, tag_len);
   push_ptr[tag_len] = 0;
   _element_close_stack_ptr = push_ptr;
   _element_depth += 1;
 }
 // ------------------------------------------------------------------
 void xmlStream::pop_tag(const char* tag) {
   assert_if_no_error(!inside_attrs(), "cannot close element inside attrs");
   assert(_element_depth > 0, "must be in an element to close");
   assert(*tag != 0, "tag must not be empty");
   char* cur_tag = _element_close_stack_ptr;
   bool  bad_tag = false;
   while (*cur_tag != 0 && strcmp(cur_tag, tag) != 0) {
     this->print_cr("</%s> <!-- missing closing tag -->", cur_tag);
     _element_close_stack_ptr = (cur_tag += strlen(cur_tag) + 1);
     _element_depth -= 1;
     bad_tag = true;
   }
   if (*cur_tag == 0) {
     bad_tag = true;
   } else {
     // Pop the stack, by skipping over the tag and its null.
     _element_close_stack_ptr = cur_tag + strlen(cur_tag) + 1;
     _element_depth -= 1;
   }
   if (bad_tag && !VMThread::should_terminate() && !is_error_reported())
     assert(false, "bad tag in log");
 }
 #endif
 // ------------------------------------------------------------------
 // First word in formatted string is element kind, and any subsequent
 // words must be XML attributes.  Outputs "<kind .../>".
 void xmlStream::elem(const char* format, ...) {
   va_list ap;
   va_start(ap, format);
   va_elem(format, ap);
   va_end(ap);
 }
 // ------------------------------------------------------------------
 void xmlStream::va_elem(const char* format, va_list ap) {
   va_begin_elem(format, ap);
   end_elem();
 }
 // ------------------------------------------------------------------
 // First word in formatted string is element kind, and any subsequent
 // words must be XML attributes.  Outputs "<kind ...", not including "/>".
 void xmlStream::begin_elem(const char* format, ...) {
   va_list ap;
   va_start(ap, format);
   va_tag(false, format, ap);
   va_end(ap);
 }
 // ------------------------------------------------------------------
 void xmlStream::va_begin_elem(const char* format, va_list ap) {
   va_tag(false, format, ap);
 }
 // ------------------------------------------------------------------
 // Outputs "/>".
 void xmlStream::end_elem() {
   assert(_markup_state == ELEM, "misplaced end_elem");
   print_raw("/>\n");
   _markup_state = BODY;
 }
 // ------------------------------------------------------------------
 // Outputs formatted text, followed by "/>".
 void xmlStream::end_elem(const char* format, ...) {
   va_list ap;
   va_start(ap, format);
   out()->vprint(format, ap);
   va_end(ap);
   end_elem();
 }
 // ------------------------------------------------------------------
 // First word in formatted string is element kind, and any subsequent
 // words must be XML attributes.  Outputs "<kind ...>".
 void xmlStream::head(const char* format, ...) {
   va_list ap;
   va_start(ap, format);
   va_head(format, ap);
   va_end(ap);
 }
 // ------------------------------------------------------------------
 void xmlStream::va_head(const char* format, va_list ap) {
   va_begin_head(format, ap);
   end_head();
 }
 // ------------------------------------------------------------------
 // First word in formatted string is element kind, and any subsequent
 // words must be XML attributes.  Outputs "<kind ...", not including ">".
 void xmlStream::begin_head(const char* format, ...) {
   va_list ap;
   va_start(ap, format);
   va_tag(true, format, ap);
   va_end(ap);
 }
 // ------------------------------------------------------------------
 void xmlStream::va_begin_head(const char* format, va_list ap) {
   va_tag(true, format, ap);
 }
 // ------------------------------------------------------------------
 // Outputs ">".
 void xmlStream::end_head() {
   assert(_markup_state == HEAD, "misplaced end_head");
   print_raw(">\n");
   _markup_state = BODY;
 }
 // ------------------------------------------------------------------
 // Outputs formatted text, followed by ">".
 void xmlStream::end_head(const char* format, ...) {
   va_list ap;
   va_start(ap, format);
   out()->vprint(format, ap);
   va_end(ap);
   end_head();
 }
 // ------------------------------------------------------------------
 // Outputs "</kind>".
 void xmlStream::tail(const char* kind) {
   pop_tag(kind);
   print_raw("</");
   print_raw(kind);
   print_raw(">\n");
 }
 // ------------------------------------------------------------------
 // Outputs "<kind_done ... stamp='D.DD'/> </kind>".
 void xmlStream::done(const char* format, ...) {
   va_list ap;
   va_start(ap, format);
   va_done(format, ap);
   va_end(ap);
 }
 // ------------------------------------------------------------------
 // Outputs "<kind_done stamp='D.DD'/> </kind>".
 // Because done_raw() doesn't need to format strings, it's simpler than
 // done(), and can be called safely by fatal error handler.
 void xmlStream::done_raw(const char* kind) {
   print_raw("<");
   print_raw(kind);
   print_raw("_done stamp='");
   out()->stamp();
   print_raw_cr("'/>");
   print_raw("</");
   print_raw(kind);
   print_raw_cr(">");
 }
 // ------------------------------------------------------------------
 void xmlStream::va_done(const char* format, va_list ap) {
   char buffer[200];
   guarantee(strlen(format) + 10 < sizeof(buffer), "bigger format buffer")
   const char* kind = format;
   const char* kind_end = strchr(kind, ' ');
   size_t kind_len = (kind_end != NULL) ? (kind_end - kind) : strlen(kind);
   strncpy(buffer, kind, kind_len);
   strcpy(buffer + kind_len, "_done");
   strcat(buffer, format + kind_len);
   // Output the trailing event with the timestamp.
   va_begin_elem(buffer, ap);
   stamp();
   end_elem();
   // Output the tail-tag of the enclosing element.
   buffer[kind_len] = 0;
   tail(buffer);
 }
 // Output a timestamp attribute.
 void xmlStream::stamp() {
   assert_if_no_error(inside_attrs(), "stamp must be an attribute");
   print_raw(" stamp='");
   out()->stamp();
   print_raw("'");
 }
 // ------------------------------------------------------------------
 // Output a method attribute, in the form " method='pkg/cls name sig'".
 // This is used only when there is no ciMethod available.
 void xmlStream::method(methodHandle method) {
   assert_if_no_error(inside_attrs(), "printing attributes");
   if (method.is_null())  return;
   print_raw(" method='");
   method_text(method);
   print("' bytes='%d'", method->code_size());
   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());
   int throwouts = method->interpreter_throwout_count();
   if (throwouts != 0)  print(" throwouts='%d'", throwouts);
   methodDataOop mdo = method->method_data();
   if (mdo != NULL) {
     uint cnt;
     cnt = mdo->decompile_count();
     if (cnt != 0)  print(" decompiles='%d'", cnt);
     for (uint reason = 0; reason < mdo->trap_reason_limit(); reason++) {
       cnt = mdo->trap_count(reason);
       if (cnt != 0)  print(" %s_traps='%d'", Deoptimization::trap_reason_name(reason), cnt);
     }
     cnt = mdo->overflow_trap_count();
     if (cnt != 0)  print(" overflow_traps='%d'", cnt);
     cnt = mdo->overflow_recompile_count();
     if (cnt != 0)  print(" overflow_recompiles='%d'", cnt);
   }
 }
 void xmlStream::method_text(methodHandle method) {
   assert_if_no_error(inside_attrs(), "printing attributes");
   if (method.is_null())  return;
   //method->print_short_name(text());
   method->method_holder()->klass_part()->name()->print_symbol_on(text());
   print_raw(" ");  // " " is easier for tools to parse than "::"
   method->name()->print_symbol_on(text());
   print_raw(" ");  // separator
   method->signature()->print_symbol_on(text());
 }
 // ------------------------------------------------------------------
 // Output a klass attribute, in the form " klass='pkg/cls'".
 // This is used only when there is no ciKlass available.
 void xmlStream::klass(KlassHandle klass) {
   assert_if_no_error(inside_attrs(), "printing attributes");
   if (klass.is_null())  return;
   print_raw(" klass='");
   klass_text(klass);
   print_raw("'");
 }
 void xmlStream::klass_text(KlassHandle klass) {
   assert_if_no_error(inside_attrs(), "printing attributes");
   if (klass.is_null())  return;
   //klass->print_short_name(log->out());
   klass->name()->print_symbol_on(out());
 }
 void xmlStream::name(symbolHandle name) {
   assert_if_no_error(inside_attrs(), "printing attributes");
   if (name.is_null())  return;
   print_raw(" name='");
   name_text(name);
   print_raw("'");
 }
 void xmlStream::name_text(symbolHandle name) {
   assert_if_no_error(inside_attrs(), "printing attributes");
   if (name.is_null())  return;
   //name->print_short_name(text());
   name->print_symbol_on(text());
 }
 void xmlStream::object(const char* attr, Handle x) {
   assert_if_no_error(inside_attrs(), "printing attributes");
   if (x.is_null())  return;
   print_raw(" ");
   print_raw(attr);
   print_raw("='");
   object_text(x);
   print_raw("'");
 }
 void xmlStream::object_text(Handle x) {
   assert_if_no_error(inside_attrs(), "printing attributes");
   if (x.is_null())  return;
   //x->print_value_on(text());
   if (x->is_method())
     method_text(methodOop(x()));
   else if (x->is_klass())
     klass_text(klassOop(x()));
   else if (x->is_symbol())
     name_text(symbolOop(x()));
   else
     x->print_value_on(text());
 }
 void xmlStream::flush() {
   out()->flush();
   _last_flush = count();
 }
 void xmlTextStream::flush() {
   if (_outer_xmlStream == NULL)  return;
   _outer_xmlStream->flush();
 }
 void xmlTextStream::write(const char* str, size_t len) {
   if (_outer_xmlStream == NULL)  return;
   _outer_xmlStream->write_text(str, len);
   update_position(str, len);
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/utilities/xmlstream.cpp@c96030fff130 (annotated)

src/share/vm/utilities/xmlstream.cpp