File: map_hash_interprocess.stp

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systemtap 2.6-0.2
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# This test makes sure that interprocess hashing works, especially for stapdyn,
# so for example the stap_hash_seed must be correctly shared.

global key1 = "foo"
global key2 = 42
global value = 0x123456789ABCDEF

global array

# The array write occurs in the target context
probe process.begin {
  array[key1, key2] = value
}

# The array read occurs in neutral context (stapio/stapdyn).
# It's also keyed manually, because 'foreach' doesn't exercise hashing.
probe end {
  printf("array[\"%s\", %d]: %#x\n",
         key1, key2, array[key1, key2])
}