| 1 | #!/usr/bin/env bash
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| 2 | #
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| 3 | # Following:
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| 4 | # https://docs.python.org/3/howto/instrumentation.html
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| 5 | #
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| 6 | # Couldn't get this to work. Even building it from source doesn't work!
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| 7 | # 'stap' invokes a compiler, and I get compiler errors.
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| 8 | #
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| 9 | # It appears to be very brittle.
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| 10 | #
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| 11 | # https://stackoverflow.com/questions/46047270/systemtap-error-on-ubuntu
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| 12 | #
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| 13 | # Usage:
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| 14 | # ./systemtap.sh <function name>
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| 15 |
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| 16 | set -o nounset
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| 17 | set -o pipefail
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| 18 | set -o errexit
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| 19 |
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| 20 | deps() {
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| 21 | # 'stap' lives in systemtap package
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| 22 | sudo apt install systemtap systemtap-sdt-dev
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| 23 | }
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| 24 |
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| 25 | stap-deps() {
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| 26 | # For DWARF debugging info, interesting.
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| 27 | sudo apt install libdw-dev libdw1
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| 28 | }
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| 29 |
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| 30 | # NOTE: systemtap-3.2 is out, but doesn't compile on Ubuntu xenial!
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| 31 | download() {
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| 32 | wget --no-clobber --directory _tmp \
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| 33 | https://sourceware.org/systemtap/ftp/releases/systemtap-3.1.tar.gz
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| 34 | }
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| 35 |
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| 36 | extract() {
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| 37 | cd _tmp
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| 38 | tar -x -z < systemtap-3.1.tar.gz
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| 39 | }
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| 40 |
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| 41 | readonly PY36=~/src/languages/Python-3.6.1
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| 42 |
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| 43 | build-python() {
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| 44 | pushd $PY36
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| 45 | # There is no --with-systemtap/
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| 46 | ./configure --with-dtrace
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| 47 | make -j 7
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| 48 | popd
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| 49 | }
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| 50 |
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| 51 | # Default Python build doesn't have it
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| 52 | elf() {
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| 53 | readelf -n $(which python3)
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| 54 | echo ---
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| 55 | # Now this has "stapsdt" -- SystemTap probe descriptors.
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| 56 | readelf -n $PY36/python
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| 57 | }
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| 58 |
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| 59 | _demo() {
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| 60 | #local stp="$PWD/benchmarks/call-hierarchy.stp"
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| 61 |
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| 62 | # C compile errors? It's getting further.
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| 63 | #local stp="$PY36/Lib/test/dtracedata/call_stack.stp"
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| 64 | local stp="$PY36/Lib/test/dtracedata/gc.stp"
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| 65 | #local stp="$PY36/Lib/test/dtracedata/assert_usable.stp"
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| 66 |
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| 67 | local py="$PWD/test/sh_spec.py"
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| 68 |
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| 69 | pushd $PY36
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| 70 | stap -v $stp -c "./python $py"
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| 71 | popd
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| 72 | }
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| 73 | demo() { sudo $0 _demo; }
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| 74 |
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| 75 | "$@"
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