| 1 | #!/usr/bin/env bash
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| 2 | #
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| 3 | # Usage:
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| 4 | # demo/bash-call-stack.sh <function name>
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| 5 |
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| 6 | set -o nounset
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| 7 | set -o pipefail
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| 8 | set -o errexit
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| 9 |
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| 10 | print-stack() {
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| 11 | local n=${#BASH_SOURCE[@]}
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| 12 | for (( i = 0; i < n; ++i)); do
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| 13 | echo "STACK:${BASH_SOURCE[i]}:${FUNCNAME[i]}:${BASH_LINENO[i]}"
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| 14 | done
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| 15 | }
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| 16 |
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| 17 |
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| 18 | f() {
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| 19 | echo 'hi from f'
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| 20 | g
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| 21 | }
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| 22 |
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| 23 | g() {
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| 24 | echo 'hi from g'
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| 25 | print-stack
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| 26 | }
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| 27 |
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| 28 | no-error() {
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| 29 | # -1 position is the bottom of the stack
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| 30 | #
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| 31 | # It has has demo/bash-stack.sh:main:0
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| 32 | #
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| 33 | # This is tested in spec/introspect.sh
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| 34 |
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| 35 | #PS4='+ ${BASH_SOURCE[-1]}:${FUNCNAME[-1]}:${BASH_LINENO[-1]} '
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| 36 | #set -x
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| 37 | f
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| 38 | }
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| 39 |
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| 40 | h() {
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| 41 | echo 'hi from h'
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| 42 | false
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| 43 | #echo $x
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| 44 | }
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| 45 |
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| 46 | error() {
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| 47 | set -o errtrace # needed to keep it active
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| 48 | trap 'print-stack' ERR
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| 49 |
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| 50 | h
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| 51 | }
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| 52 |
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| 53 | python() {
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| 54 | cat >_tmp/callstack.py <<EOF
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| 55 | def f():
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| 56 | print("hi from f")
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| 57 | exec("g()")
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| 58 |
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| 59 | def g():
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| 60 | print("hi from g")
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| 61 | raise RuntimeError()
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| 62 |
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| 63 | f()
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| 64 | EOF
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| 65 |
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| 66 | echo
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| 67 | echo
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| 68 | set +o errexit
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| 69 |
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| 70 | # 3 frames: <module> f g
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| 71 | # and quotes the code
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| 72 | python2 _tmp/callstack.py
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| 73 |
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| 74 | cat >_tmp/callmain.py <<EOF
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| 75 | def h():
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| 76 | import callstack
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| 77 |
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| 78 | h()
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| 79 | EOF
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| 80 |
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| 81 | # 5 frames: h() imprt callstack f() g() raise
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| 82 | python2 _tmp/callmain.py
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| 83 | }
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| 84 |
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| 85 | "$@"
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| 86 |
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