Related error

stacktrace_test.cpp uses sigaltstack, but there are some unknown issues when disabling the sigaltstack:

            ...
            {
                stack_t ss;
                ss.ss_sp = 0;
                ss.ss_size = 0;
                ss.ss_flags = SS_DISABLE;
                if (int r = sigaltstack(&ss, nullptr); r < 0) {
                    perror("sigaltstack");
                }
            } 

This code causes an "sigaltstack: Cannot allocate memory" error message, but the underlying cause is unknown.

MacOS sigaltstack

We don't currently support sigaltstack on mac (code here):

#if defined(__linux__) || defined(__FreeBSD__)
#define MONGO_HAS_SIGALTSTACK 1
#else
#define MONGO_HAS_SIGALTSTACK 0
#endif 

The stacktrace test guarding macro is less restrictive:

#if !defined(_WIN32)
#define HAVE_SIGALTSTACK
#endif 

This correctly includes macOS, which is posix compliant and implements sigaltstack.

We should temporarily disable all stacktrace sigaltstack testing on macOS at least.