Invoking java.util.ResourceBundle.getBundle(String) leaks some native memory.
A small sample program is attached. If you run it, you will see that the
process' virual memory size keeps growing while Java heap consumption stays at
a same level after some iteration.
The problem is in gnu.gcj.runtime.StackTrace.fillInStackTrace (a native code)
invoked through gnu.gcj.runtime.StackTrace.classAt through
java.lang.Class.forName through java.util.ResourceBundle.tryBundle. When the
native method fillInStackTrace is invoked by a method other than its
constructor, a native memory allocated through _Jv_Malloc and stored in addrs
is discarded without _Jv_Free'ed.
I exprerienced this problem on Windows (MinGW) but I belive it is common to
other platforms.
A suggested fix is attached:
--- libjava/gnu/gcj/runtime/natStackTrace.orig.cc 2003-10-02
16:10:34.000000000 +0900
+++ libjava/gnu/gcj/runtime/natStackTrace.cc 2006-02-17 00:01:52.529572700
+0900
@@ -85,6 +85,8 @@
else
frame = NULL;
+ if (addrs != NULL)
+ _Jv_Free (addrs);
addrs = reinterpret_cast<gnu::gcj::RawData *> (frame);
#else // HAVE_BACKTRACE
(void)maxlen;
---
A sample program to reproduce the problem follows:
import java.util.ResourceBundle;
import java.util.MissingResourceException;
public class Leak {
public static void main(String[] args) {
final Runtime r = Runtime.getRuntime();
for (;;) {
for (int i = 0; i < 10000; i++) {
try {
ResourceBundle.getBundle("nothing");
} catch (MissingResourceException e) {
}
}
System.out.println(r.freeMemory() + "/" + r.totalMemory());
}
}
}
--
Summary: Native Momory Leak in ResourceBundle
Product: gcc
Version: 3.4.5
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: libgcj
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: fexx at fexx dot org
GCC build triplet: mingw32
GCC host triplet: mingw32
GCC target triplet: mingw32
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26351
