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scripts: make Nyx VM memory size configurable #169

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Merged
morehouse merged 1 commit into from
Aug 4, 2026
+10 −2
Merged

scripts: make Nyx VM memory size configurable #169

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12 changes: 10 additions & 2 deletions scripts/setup-nyx.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -4,8 +4,11 @@
#
# Usage: ./scripts/setup-nyx.sh <sharedir> <docker-image> <aflplusplus-path>
#
# Environment Variables:
# NYX_MEM_MB: Sets the memory allocation for the Nyx VM in MB (default: 2048).
#
# Example:
# ./scripts/setup-nyx.sh /tmp/smite-lnd-nyx smite-lnd ~/AFLplusplus
# NYX_MEM_MB=4096 ./scripts/setup-nyx.sh /tmp/smite-lnd-nyx smite-lnd ~/AFLplusplus
#
# Creates the necessary files in sharedir for snapshot fuzzing using
# docker-image. Requires that docker-image is already built and that AFL++ has
Expand Down Expand Up @@ -72,7 +75,12 @@ cat > "$FORCE_FORK_DIR/sitecustomize.py" <<'EOF'
import multiprocessing
multiprocessing.set_start_method("fork", force=True)
EOF
(cd "$PACKER_PATH" && PYTHONPATH="$FORCE_FORK_DIR${PYTHONPATH:+:$PYTHONPATH}" ./nyx_config_gen.py "$SHAREDIR" Kernel -m 4096)

# The memory allocated to a single QEMU VM instance. Defaults to 2048 MB.
NYX_MEM_MB="${NYX_MEM_MB:-2048}"
echo "Using VM image size: ${NYX_MEM_MB} MB"

(cd "$PACKER_PATH" && PYTHONPATH="$FORCE_FORK_DIR${PYTHONPATH:+:$PYTHONPATH}" ./nyx_config_gen.py "$SHAREDIR" Kernel -m "$NYX_MEM_MB")

# Create fuzz_no_pt.sh script
echo "Creating fuzz_no_pt.sh..."
Expand Down