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#!/bin/bash
# There are many kinds of expressions, but most operators are lower precedence
# than autocast (parser::parse_dwarf_value). We should be able to parse
# autocasts on anything inside that though, having higher precedence.
# Any (expr) is also valid, but it's not interesting to enumerate them.
expressions=(
'(6 * 9)' # any parenthesized expression
'"the ultimate answer"' # literal_string
'42' # literal_number
'%{ 42 %}' # embedded_expr
'answer' # symbol
'@max(answer)' # stat_op
'@defined(answer)' # defined_op
'@entry(answer)' # entry_op
'@perf("answer")' # perf_op
'answer[6,9]' # symbol arrayindex
'@hist_log(answer)[42]' # hist_op arrayindex
'report(answer)' # functioncall
'print(answer)' # print_format
)
for e in "${expressions[@]}"; do
# Try a few different flavors of autocast
autocast_expressions=(
"& $e"
"$e ->member"
"$e [index]"
"$e \$"
"$e \$\$"
"& $e ->member [index]"
"$e [index] ->member\$"
)
for ae in "${autocast_expressions[@]}"; do
echo "probe begin { ( $ae ) }"
done
done |
stap "$@" -g -p1 -
|
