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moralismercatus / crete

Open source concolic testing tool for binaries
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Is CRETE framework leaking file descriptors? #156

Closed moralismercatus closed 7 years ago

moralismercatus commented 8 years ago

Environment: dispatch, vm-node (4 QEMU instances), and svm-node (1 Klee instance).

An exception was raised in svm-node for fs::copy_file during the preparation phase (copying files from trace_dir to trace_dir/klee-run). The exception stated that the maximum number of open files limit had been exceeded.

While the error occurred in svm-node, it's more likely the error is from vm-node or QEMU, as when running vm-node with 1 QEMU instance did not have this problem.

Workaround: simply add ulimit -n 2048 to .bashrc.

moralismercatus commented 7 years ago

As far as I can tell: No. It is more likely Klee that was causing the limit of FDs to be exhausted. Indeed, Klee's manual recommends setting ulimit -n.