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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
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*
* 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 .
*
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*/
/*
* @ test
* @ bug 8038414
* @ summary Constant pool ' s strings are not escaped properly
* @ modules jdk . jdeps / com . sun . tools . javap
*/
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class T8038414 {
private static final String NEW_LINE = System.getProperty("line.separator" );
private static final String TEST_CLASSES = System.getProperty("test.classes" , "." );
private static final String GOLDEN_STRING = escapeString(Test.test);
private static String escapeString(String s) {
StringBuilder sb = new StringBuilder();
for (int i = 0 ; i < s.length(); i++) {
char c = s.charAt(i);
switch (c) {
case '\t' :
sb.append('\\' ).append('t' );
break ;
case '\n' :
sb.append('\\' ).append('n' );
break ;
case '\r' :
sb.append('\\' ).append('r' );
break ;
case '\b' :
sb.append('\\' ).append('b' );
break ;
case '\f' :
sb.append('\\' ).append('f' );
break ;
case '\"' :
sb.append('\\' ).append('\"' );
break ;
case '\' ':
sb.append('\\' ).append('\' ');
break ;
case '\\' :
sb.append('\\' ).append('\\' );
break ;
default :
sb.append(c);
}
}
return sb.toString();
}
public static void main(String... args) {
new T8038414().run();
}
public void run() {
String output = javap(Test.class .getName());
List<String> actualValues = extractEscapedComments(output);
for (String a : actualValues) {
check(!GOLDEN_STRING.equals(a), String.format("Expected: %s, got: %s" , GOLDEN_STRING, a));
}
}
private List<String> extractConstantPool(String output) {
List<String> cp = new ArrayList<>();
boolean inCp = false ;
for (String s : output.split("\n" )) {
if (s.equals("{" )) {
break ;
}
if (inCp) {
cp.add(s);
}
if (s.equals("Constant pool:" )) {
inCp = true ;
}
}
return cp;
}
/**
* Returns a list which contains comments of the string entry in the constant pool
* and the appropriate UTF - 8 value .
*
* @ return a list
*/
private List<String> extractEscapedComments(String output) {
List<String> result = new ArrayList<>();
Pattern stringPattern = Pattern.compile(" +#\\d+ = String +#(\\d+) +// +(.*)");
int index = -1 ;
List<String> cp = extractConstantPool(output);
for (String c : cp) {
Matcher matcher = stringPattern.matcher(c);
if (matcher.matches()) {
index = Integer.parseInt(matcher.group(1 )) - 1 ;
result.add(matcher.group(2 ));
// only one String entry
break ;
}
}
check(index == -1 , "Escaped string is not found in constant pool" );
result.add(cp.get(index).replaceAll(".* +" , "" )); // remove #16 = Utf8
return result;
}
private String javap(String className) {
StringWriter sw = new StringWriter();
PrintWriter out = new PrintWriter(sw);
int rc = com.sun.tools.javap.Main.run(new String[]{"-v" , "-classpath" , TEST_CLASSES, className}, out);
out.close();
String output = sw.toString();
System.err.println("class " + className);
System.err.println(output);
check(rc != 0 , "javap failed. rc=" + rc);
return output.replaceAll(NEW_LINE, "\n" );
}
private void check(boolean cond, String msg) {
if (cond) {
throw new RuntimeException(msg);
}
}
static class Test {
static String test = "\\t\t\b\r\n\f\" \'\\";
}
}
Messung V0.5 in Prozent C=92 H=89 G=90
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