[PRISM] Fix memory leak in iseq #9592
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rb_iseq_compile_prism_node calls both rb_translate_prism and iseq_setup.
Both of these functions call iseq_set_sequence. This means that the first
iseq_set_sequence will leak because the iseq will be overwritten.
For example:
10.times do
100_000.times do
RubyVM::InstructionSequence.compile_prism("")
end
puts `ps -o rss= -p #{$$}`
end
Before:
20528
27328
33840
40208
46400
52960
59168
65600
71888
78352
After:
13696
13712
13712
13712
13712
14352
14352
14992
14992
14992
kddnewton
approved these changes
Jan 18, 2024
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rb_iseq_compile_prism_node calls both rb_translate_prism and iseq_setup. Both of these functions call iseq_set_sequence. This means that the first iseq_set_sequence will leak because the iseq will be overwritten.
For example:
Before:
After: