diff --git a/jdk/src/share/native/sun/font/DrawGlyphList.c b/jdk/src/share/native/sun/font/DrawGlyphList.c index 483e3fe314e..c4dcdf99f60 100644 --- a/jdk/src/share/native/sun/font/DrawGlyphList.c +++ b/jdk/src/share/native/sun/font/DrawGlyphList.c @@ -52,7 +52,8 @@ GlyphBlitVector* setupBlitVector(JNIEnv *env, jobject glyphlist) { - int g, bytesNeeded; + int g; + size_t bytesNeeded; jlong *imagePtrs; jfloat* positions = NULL; GlyphInfo *ginfo; @@ -71,6 +72,9 @@ GlyphBlitVector* setupBlitVector(JNIEnv *env, jobject glyphlist) { bytesNeeded = sizeof(GlyphBlitVector)+sizeof(ImageRef)*len; gbv = (GlyphBlitVector*)malloc(bytesNeeded); + if (gbv == NULL) { + return NULL; + } gbv->numGlyphs = len; gbv->glyphs = (ImageRef*)((unsigned char*)gbv+sizeof(GlyphBlitVector)); @@ -479,7 +483,8 @@ Java_sun_java2d_loops_DrawGlyphListLCD_DrawGlyphListLCD */ GlyphBlitVector* setupLCDBlitVector(JNIEnv *env, jobject glyphlist) { - int g, bytesNeeded; + int g; + size_t bytesNeeded; jlong *imagePtrs; jfloat* positions = NULL; GlyphInfo *ginfo; @@ -500,6 +505,9 @@ GlyphBlitVector* setupLCDBlitVector(JNIEnv *env, jobject glyphlist) { bytesNeeded = sizeof(GlyphBlitVector)+sizeof(ImageRef)*len; gbv = (GlyphBlitVector*)malloc(bytesNeeded); + if (gbv == NULL) { + return NULL; + } gbv->numGlyphs = len; gbv->glyphs = (ImageRef*)((unsigned char*)gbv+sizeof(GlyphBlitVector)); diff --git a/jdk/test/java/awt/Graphics2D/DrawString/DrawStringCrash.java b/jdk/test/java/awt/Graphics2D/DrawString/DrawStringCrash.java new file mode 100644 index 00000000000..a1eeb6b1a20 --- /dev/null +++ b/jdk/test/java/awt/Graphics2D/DrawString/DrawStringCrash.java @@ -0,0 +1,64 @@ +/* + * Copyright (c) 2014, 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. + */ + +/* + * @test + * @bug 8043508 + * @summary Drawing a very long string crashes VM + */ + +import java.awt.*; +import java.awt.image.*; + +public class DrawStringCrash { + + public static void main(String[] args) { + StringBuffer sb = new StringBuffer(); + String s = "abcdefghijklmnopqrstuzwxyz"; + for (int x = 0; x < 100000 ; x++) { + sb.append(s); + } + // Now have a string which uses approx 5Mb memory + // Loop again drawing doubling each time until + // we reach 8 billion chars or get OOME which means we can't + // go any further. + // Often there is no crash because Java OOM happens + // long before native heap runs out. + long maxLen = 8L * 1024 * 1024 * 1024; + int len = sb.length(); + + BufferedImage bi = + new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB); + Graphics2D g2d = bi.createGraphics(); + while (len < maxLen) { + try { + g2d.drawString(s, 20, 20); + } catch (OutOfMemoryError e) { + return; + } + sb.append(sb); + len *= 2; + } + return; + } +}