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[Bug libgcj/60282] New: memory leak - Double from string, _Jv_Balloc
- From: "antoine.dymond at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 20 Feb 2014 08:23:08 +0000
- Subject: [Bug libgcj/60282] New: memory leak - Double from string, _Jv_Balloc
- Auto-submitted: auto-generated
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60282
Bug ID: 60282
Summary: memory leak - Double from string, _Jv_Balloc
Product: gcc
Version: 4.8.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgcj
Assignee: unassigned at gcc dot gnu.org
Reporter: antoine.dymond at gmail dot com
I believe there is memory leak when creating a Double from a string. For
example
double value = (new Double("3.14")).doubleValue();
Valgrind output:
== 56 bytes in 1 blocks are definitely lost in loss record 17 of 31
== at 0x4C2A2DB: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
== by 0x6DE98D1: _Jv_Balloc (in /usr/lib/x86_64-linux-gnu/libgcj.so.14.0.0)
== by 0x6DEA378: _Jv_d2b (in /usr/lib/x86_64-linux-gnu/libgcj.so.14.0.0)
== by 0x6DE4BDB: _Jv_dtoa_r (in /usr/lib/x86_64-linux-gnu/libgcj.so.14.0.0)
== by 0x6DE5F0F: _Jv_dtoa (in /usr/lib/x86_64-linux-gnu/libgcj.so.14.0.0)
== by 0x65CBF9D: java::lang::String* java::lang::VMDouble::toString(double,
bool) (in /usr/lib/x86_64-linux-gnu/libgcj.so.14.0.0)
== by 0x6926404: java::lang::String* java::lang::Double::toString(double)
(in /usr/lib/x86_64-linux-gnu/libgcj.so.14.0.0)
== by 0x6926418: java::lang::AbstractStringBuffer*
java::lang::AbstractStringBuffer::append(double) (in
/usr/lib/x86_64-linux-gnu/libgcj.so.14.0.0)
== by 0x69264D8: java::lang::StringBuilder*
java::lang::StringBuilder::append(double) (in
/usr/lib/x86_64-linux-gnu/libgcj.so.14.0.0)
Reconstruct info
-----------------
$ more double_from_str.java
public class double_from_str {
public static void convert(){
double value = (new Double("3.14")).doubleValue();
System.out.printf("pi = " + value + "\n");
}
}
$ more main.cpp
#include <stdio.h>
#include <gcj/cni.h>
#include <java/lang/System.h>
#include <java/io/PrintStream.h>
#include <java/lang/Throwable.h>
#include "double_from_str.h"
int main(int argc, char *argv[])
{
using namespace java::lang;
try
{
JvCreateJavaVM(NULL);
JvAttachCurrentThread(NULL, NULL);
double_from_str().convert();
JvDetachCurrentThread();
return 0;
}
catch (Throwable *t)
{
printf("Unhandled Java exception\n");
t->printStackTrace();
return 1;
}
}
$ make -B
gcj -fPIC -c double_from_str.java
gcj -C double_from_str.java
gcjh double_from_str.class
gcj -g -lstdc++ double_from_str.o main.cpp -o main.o
cc1plus: warning: command line option
â-fbootclasspath=./:/usr/share/java/libgcj-4.8.jarâ is valid for Java but not
for C++ [enabled by default]
$ valgrind --leak-check=yes ./main.o
...
$ apt-cache show valgrind
...
Architecture: amd64
Version: 1:3.8.1-4ubuntu1
...