Kasper Johansen created JRUBY-6625:
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Summary: Memprof/Bleakhouse-like extension for JRuby
Key: JRUBY-6625
URL: https://jira.codehaus.org/browse/JRUBY-6625
Project: JRuby
Issue Type: Wish
Components: Extensions
Reporter: Kasper Johansen
Priority: Minor
A memprof-like feature for JRuby to debug memory leaks, by telling the amount
of live objects grouped by file and line-number from where they were created in
the code. Could be enabled by giving an argument like "--memory-profiling" to
JRuby, since it would properly eat some performance.
In memprof-mode JRuby saves the file and line number from allocated objects in
a hash with a counter. Possibly with a hook into "Class.new" or something on
the Java-side? When an object is freed the counter counts down (could possibly
be hacked by using weak references if this is not possible otherwise?).
When a static method like "JRuby::Memprof.stats" is called or the application
ends, the contents of this hash should be printed. It should then tell the
amount of live objects from which file and line-number to debug memory leaks in
the Ruby-side of the source code.
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