| #pragma once |
| |
| #if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS |
| |
| namespace node::ffi { |
| |
| // Returns true if executable memory allocation (mmap + mprotect to RX) works |
| // on this process. Runs a one-time self-test that allocates a tiny stub, |
| // writes a ret-style instruction, and transitions it to RX. The page is not |
| // executed: a successful RX transition is the support signal, and executing a |
| // freshly generated probe could crash the process on systems that block it. |
| // |
| // Catches: |
| // - macOS MAP_JIT entitlement missing |
| // - Hardened-runtime restrictions |
| // - SELinux execmem denial |
| // - Other OS-level restrictions on executable memory |
| // |
| // The self-test runs exactly once (std::call_once) and the result is cached |
| // process-wide. Subsequent calls return the cached value without re-running |
| // the test. |
| bool IsJitMemorySupported(); |
| |
| } // namespace node::ffi |
| |
| #endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS |
