gc-analyze-5 - Online in the Cloud

PROGRAM:

NAME

gc-analyze - Analyze Garbage Collector (GC) memory dumps

SYNOPSIS

gc-analyze [OPTION] ... [file]

DESCRIPTION

gc-analyze prints an analysis of a GC memory dump to standard out.

The memory dumps may be created by calling "gnu.gcj.util.GCInfo.enumerate(String
namePrefix)" from java code. A memory dump will be created on an out of memory condition
if "gnu.gcj.util.GCInfo.setOOMDump(String namePrefix)" is called before the out of memory
occurs.

Running this program will create two files: TestDump001 and TestDump001.bytes.

import gnu.gcj.util.*;
import java.util.*;

public class GCDumpTest
{
static public void main(String args[])
{
ArrayList<String> l = new ArrayList<String>(1000);

for (int i = 1; i < 1500; i++) {
l.add("This is string #" + i);
}
GCInfo.enumerate("TestDump");
}
}

The memory dump may then be displayed by running:

gc-analyze -v TestDump001

OPTIONS

--verbose
-v Verbose output.

-p tool-prefix
Prefix added to the names of the nm and readelf commands.

-d directory
Directory that contains the executable and shared libraries used when the dump was
generated.

--help
Print a help message, then exit.

--version
Print version information, then exit.

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