This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 115c. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.

2024-09-25

1173. Unclear specification of effects of signal handling

[Voted into the WP at the November, 2010 meeting.]

The current wording of 6.9.1 [intro.execution] paragraph 6 could be read as saying that any signal would leave the program in an unspecified state after completing.

Proposed resolution (August, 2010):

Change 6.9.1 [intro.execution] paragraph 6 as follows:

When the processing of the abstract machine is interrupted by receipt of a signal, the values of objects which are neither

• of type volatile std::sig_atomic_t nor

• lock-free atomic objects (33.5.5 [atomics.lockfree])

are unspecified during the execution of the signal handler, and the value of any object not in either of these two categories that is modified by the handler becomes undefined.