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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