Make globalcontext_make_atom safe
#1443
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globalcontext_make_atom may allocate memory, and that operation might fail. In that situation now the function returns an invalid term that must be checked (so an out of memory error can be raised). Signed-off-by: Davide Bettio <[email protected]>
Add macro that raises an error when there is an out of memory while making an atom, otherwise a term with given name is declared and available. Signed-off-by: Davide Bettio <[email protected]>
UncleGrumpy
reviewed
Dec 29, 2024
| #define REQUIRE_ATOM(name, lenstr, str, glb) \ | ||
| term name = globalcontext_make_atom(glb, lenstr str); \ | ||
| if (UNLIKELY(term_is_invalid_term(name))) { \ | ||
| RAISE_ERROR(OUT_OF_MEMORY_ATOM); \ |
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This is perfect for nifs, but if this is used in a port is raising the error what we really want? Maybe we need a separate macro for use in ports that would just return the out_of_memory atom? Ideally it would be {error, out_of_memory} (for ports), but in this case it would be unlikely there was enough ram to construct the error tuple.
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See also: #1442
These changes are made under both the "Apache 2.0" and the "GNU Lesser General
Public License 2.1 or later" license terms (dual license).
SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later