Data is written to end of string passed to IO#sysread instead of beginning
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Key: JRUBY-3019
URL: http://jira.codehaus.org/browse/JRUBY-3019
Project: JRuby
Issue Type: Bug
Reporter: Wayne Meissner
Assignee: Thomas E Enebo
When calling the two-arg variant of IO#sysread, data is appended to the end of
the string instead of the start. As a side effect, the string grows by the
requested amount of bytes each time it is passed into IO#sysread, and the JVM
can run out of memory.
e.g.
{noformat}
Thread.new {
len = 4096
buf = 0.chr * len
loop do
client = serv.accept
total = 0
begin
loop do
s = client.sysread(len, buf)
total += s.length if s
end
rescue Exception => ex
puts "sysread failed total=#{total}: #{ex}"
end
puts "client closed total=#{total}"
client.close
end
}
{noformat}
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