gc−analyze − Analyze Garbage Collector (GC) memory dumps
gc-analyze [ OPTION ] ... [file]
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
−−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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