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#! stap -p2
probe kernel.function("vfs_read") if (foo(2)) { } # must not call functions
function foo(x) { return x }
# NB: If this condition is relaxed, then this will have to be blocked:
# global y function foo () { return y++ } # since global y is written-to
# but this one would be fine:
# function foo () { return y++ } # since y is written-to
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