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#! stap -p2
probe begin {
// basic @cast test, with and without specifying kernel
println(@cast(0, "task_struct")->tgid)
println(@cast(0, "task_struct", "kernel")->tgid)
// check module-search paths
println(@cast(0, "task_struct", "foo:kernel:bar")->tgid)
// would be nice to test usermode @cast too,
// but who knows what debuginfo is installed...
// check modules generated from headers
println(@cast(0, "task_struct", "kernel<linux/sched.h>")->tgid)
println(@cast(0, "timeval", "<sys/time.h>")->tv_sec)
// sometimes multiple headers are needed in tandem
println(@cast(0, "task_struct", "kernel<linux/sched.h><linux/fs_struct.h>")->fs->umask)
// make sure that bogus @casts can get optimized away
@cast(0, "task_struct")->no_such_field
@cast(0, "task_struct")->parent->no_such_field
@cast(0, "no_such_type")->tgid
@cast(0, "task_struct", "no_such_module")->tgid
}
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