int OPENSSL_atexit(void (*handler)(void)) { OPENSSL_INIT_STOP *newhand; #if !defined(OPENSSL_NO_DSO) && !defined(OPENSSL_USE_NODELETE) { union { void *sym; void (*func)(void); } handlersym; handlersym.func = handler; # ifdef DSO_WIN32 { HMODULE handle = NULL; BOOL ret; /* * We don't use the DSO route for WIN32 because there is a better * way */ ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_PIN, handlersym.sym, &handle); if (!ret) return 0; } # else /* * Deliberately leak a reference to the handler. This will force the * library/code containing the handler to remain loaded until we run the * atexit handler. If -znodelete has been used then this is * unnecessary. */ { DSO *dso = NULL; ERR_set_mark(); dso = DSO_dsobyaddr(handlersym.sym, DSO_FLAG_NO_UNLOAD_ON_FREE); DSO_free(dso); ERR_pop_to_mark(); } # endif } #endif newhand = OPENSSL_malloc(sizeof(*newhand)); if (newhand == NULL) return 0; newhand->handler = handler; newhand->next = stop_handlers; stop_handlers = newhand; return 1; }
int OPENSSL_atexit(void (*handler)(void)) { OPENSSL_INIT_STOP *newhand; #if !defined(OPENSSL_NO_DSO) \ && !defined(OPENSSL_USE_NODELETE)\ && !defined(OPENSSL_NO_PINSHARED) { union { void *sym; void (*func)(void); } handlersym; handlersym.func = handler; # ifdef DSO_WIN32 { HMODULE handle = NULL; BOOL ret; /* * We don't use the DSO route for WIN32 because there is a better * way */ ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_PIN, handlersym.sym, &handle); if (!ret) return 0; } # else /* * Deliberately leak a reference to the handler. This will force the * library/code containing the handler to remain loaded until we run the * atexit handler. If -znodelete has been used then this is * unnecessary. */ { DSO *dso = NULL; ERR_set_mark(); dso = DSO_dsobyaddr(handlersym.sym, DSO_FLAG_NO_UNLOAD_ON_FREE); /* See same code above in ossl_init_base() for an explanation. */ OSSL_TRACE1(INIT, "atexit: obtained DSO reference? %s\n", (dso == NULL ? "No!" : "Yes.")); DSO_free(dso); ERR_pop_to_mark(); } # endif } #endif if ((newhand = OPENSSL_malloc(sizeof(*newhand))) == NULL) { CRYPTOerr(CRYPTO_F_OPENSSL_ATEXIT, ERR_R_MALLOC_FAILURE); return 0; } newhand->handler = handler; newhand->next = stop_handlers; stop_handlers = newhand; return 1; }