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#!/usr/bin/env bash
set -euo pipefail
OUT_DIR="${HOME}/workspace/debug/flamegraph"
OUT_DATA="${OUT_DIR}/$(date +%y%m%d-%H%M%S).data"
OUT_SVG="${OUT_DIR}/$(date +%y%m%d-%H%M%S).svg"
mkdir -p "${OUT_DIR}"
# record the data with perf. We need to run this with sudo to get all
# the privileges we need.
sudo perf record -g --call-graph dwarf --freq max --output "${OUT_DATA}" "$@"
# give me ownership of the file
sudo chown "${USER}" "${OUT_DATA}"
perf script --input "${OUT_DATA}" |
stackcollapse-perf.pl |
flamegraph.pl >"${OUT_SVG}"
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