8137099: G1 needs to "upgrade" GC within the safepoint if it can't allocate during that safepoint to avoid OoME
Summary: During a minor GC, if memory allocation fails, start a full GC within the same VM operation in the same safepoint. This avoids a race where the GC locker can prevent the full GC from occurring, and a premature OoME.
Reviewed-by: ehelin, sjohanss, phh
Contributed-by: thomas.schatzl@oracle.com, axel.siebenborn@sap.com
/*
* Copyright (c) 2017, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*/
body {
margin: 2em 2em;
font-family: DejaVu Sans, Bitstream Vera Sans, Luxi Sans, Verdana, Arial, Helvetica;
font-size: 10pt;
line-height: 1.4;
}
pre, code, tt {
font-family: DejaVu Sans Mono, Bitstream Vera Sans Mono, Luxi Mono,
Courier New, monospace;
}
blockquote {
margin: 1.5ex 0em 1.5ex 2em;
}
p {
padding: 0pt;
margin: 1ex 0em;
}
p:first-child, pre:first-child { margin-top: 0pt; }
h1 {
font-weight: bold;
padding: 0pt;
margin: 2ex .5ex 1ex 0pt;
}
h1:first-child, h2:first-child {
margin-top: 0ex;
}
h2 {
font-weight: bold;
padding: 0pt;
margin: 2ex 0pt 1ex 0pt;
}
h3 {
font-weight: bold;
padding: 0pt;
margin: 1.5ex 0pt 1ex 0pt;
}
h4 {
font-weight: bold;
padding: 0pt;
margin: 1.5ex 0pt 1ex 0pt;
}
a:link {
color: #437291;
}
a:visited {
color: #666666;
}
a[href]:hover {
color: #e76f00;
}
a img {
border-width: 0px;
}
img {
background: white;
}
table {
border-collapse: collapse;
margin-left: 15px;
margin-right: 15px;
}
th, td {
padding: 3px;
vertical-align: top;
}
table, th, td {
border: 1px solid black;
}
caption {
text-align: left;
font-style: italic;
text-indent: 15px;
margin-bottom:10px;
}
tr:nth-child(even), tr:nth-child(even) th[scope=row] {
background: #DDD;
}
tr:nth-child(odd), tr:nth-child(odd) th[scope=row] {
background: #FFF;
}
th {
background: #DDF;
}