value_t assembler_push_map_scope(assembler_t *assm, map_scope_o *scope) {
TRY_SET(scope->map, new_heap_id_hash_map(assm->runtime, 8));
scope->super.vtable.lookup = (scope_lookup_m) map_scope_lookup;
scope->outer = assembler_set_scope(assm, (scope_o*) scope);
scope->assembler = assm;
return success();
}
static value_t lambda_scope_lookup(lambda_scope_o *self, value_t symbol,
binding_info_t *info_out) {
size_t capture_count_before = get_array_buffer_length(self->captures);
// See if we've captured this variable before.
for (size_t i = 0; i < capture_count_before; i++) {
value_t captured = get_array_buffer_at(self->captures, i);
if (value_identity_compare(captured, symbol)) {
// Found it. Record that we did if necessary and return success.
if (info_out != NULL)
binding_info_set(info_out, btLambdaCaptured, i, 0);
return success();
}
}
// We haven't seen this one before so look it up outside.
value_t value = scope_lookup(self->outer, symbol, info_out);
if (info_out != NULL && !in_condition_cause(ccNotFound, value)) {
// We found something and this is a read. Add it to the list of captures.
runtime_t *runtime = self->assembler->runtime;
if (get_array_buffer_length(self->captures) == 0) {
// The first time we add something we have to create a new array buffer
// since all empty capture scopes share the singleton empty buffer.
TRY_SET(self->captures, new_heap_array_buffer(runtime, 2));
}
TRY(add_to_array_buffer(runtime, self->captures, symbol));
binding_info_set(info_out, btLambdaCaptured, capture_count_before, 0);
}
return value;
}
value_t build_fragment_entry_map(binding_context_t *context, value_t modules) {
runtime_t *runtime = get_ambience_runtime(context->ambience);
TRY_SET(context->fragment_entry_map, new_heap_id_hash_map(runtime, 16));
TRY(build_real_fragment_entries(context, modules));
TRY(build_synthetic_fragment_entries(context));
return context->fragment_entry_map;
}
value_t get_or_create_methodspace_selector_slice(runtime_t *runtime, value_t self,
value_t selector) {
value_t cache_ptr = get_methodspace_cache_ptr(self);
value_t cache = get_freeze_cheat_value(cache_ptr);
// Create the cache if it doesn't exist.
if (is_nothing(cache)) {
TRY_SET(cache, new_heap_id_hash_map(runtime, 128));
set_freeze_cheat_value(cache_ptr, cache);
}
// Create the selector-specific cache if it doesn't exits.
value_t slice = get_id_hash_map_at(cache, selector);
if (in_condition_cause(ccNotFound, slice)) {
TRY_SET(slice, create_methodspace_selector_slice(runtime, self, selector));
TRY(set_id_hash_map_at(runtime, cache, selector, slice));
}
return slice;
}
// Gets the code from a method object, compiling the method if necessary.
static value_t ensure_method_code(runtime_t *runtime, value_t method) {
value_t code = get_method_code(method);
if (is_nothing(code)) {
TRY_SET(code, compile_method(runtime, method));
set_method_code(method, code);
}
return code;
}
// Creates and binds modules and fragments according to the given schedule.
static value_t execute_binding_schedule(binding_context_t *context, value_t schedule) {
runtime_t *runtime = get_ambience_runtime(context->ambience);
for (size_t i = 0; i < get_array_buffer_length(schedule); i++) {
value_t next = get_array_buffer_at(schedule, i);
TOPIC_INFO(Library, "About to bind %v", next);
value_t path = get_identifier_path(next);
value_t stage = get_identifier_stage(next);
// Create the bound module if it doesn't already exist.
value_t bound_module = get_id_hash_map_at(context->bound_module_map, path);
if (in_condition_cause(ccNotFound, bound_module)) {
TRY_SET(bound_module, new_heap_empty_module(runtime, path));
TRY(set_id_hash_map_at(runtime, context->bound_module_map, path,
bound_module));
}
// Create the bound fragment.
value_t bound_fragment = get_module_fragment_at(bound_module, stage);
if (in_condition_cause(ccNotFound, bound_fragment)) {
TRY_SET(bound_fragment, new_empty_module_fragment(runtime, stage,
bound_module));
TRY(add_module_fragment(runtime, bound_module, bound_fragment));
} else {
// An earlier phase needed a reference to this fragment so it has already
// been created but not initialized yet.
CHECK_EQ("Unexpected phase", get_module_fragment_epoch(bound_fragment),
feUninitialized);
TRY(init_empty_module_fragment(runtime, bound_fragment));
set_module_fragment_epoch(bound_fragment, feUnbound);
}
if (is_present_core(runtime, next)) {
// TODO: this is a hack, there should be some other mechanism for
// identifying the core module. This way of binding it also means it
// gets bound at a time that's not particularly well-defined which is
// also an issue.
TOPIC_INFO(Library, "Binding present core to %v", bound_fragment);
set_ambience_present_core_fragment(context->ambience, bound_fragment);
}
// Grab the unbound fragment we'll use to create the bound fragment.
value_t module_entries = get_id_hash_map_at(context->fragment_entry_map, path);
value_t fragment_entry = get_id_hash_map_at(module_entries, stage);
// Bind the fragment based on the data from the entry.
TRY(bind_module_fragment(context, fragment_entry, bound_fragment));
TOPIC_INFO(Library, "Done binding %v", next);
}
return success();
}
// Initialize serialization state.
static value_t serialize_state_init(serialize_state_t *state, runtime_t *runtime,
value_mapping_t *resolver, byte_buffer_t *buf) {
state->buf = buf;
state->object_offset = 0;
state->runtime = runtime;
state->resolver = resolver;
TRY_SET(state->ref_map, new_heap_id_hash_map(runtime, 16));
return success();
}
value_t assembler_init(assembler_t *assm, runtime_t *runtime, value_t fragment,
scope_o *scope) {
CHECK_FALSE("no scope callback", scope == NULL);
CHECK_FAMILY_OPT(ofModuleFragment, fragment);
TRY(assembler_init_stripped_down(assm, runtime));
TRY_SET(assm->value_pool, new_heap_id_hash_map(runtime, 16));
assm->scope = scope;
assm->fragment = fragment;
return success();
}
value_t build_bound_module(value_t ambience, value_t unbound_module) {
runtime_t *runtime = get_ambience_runtime(ambience);
binding_context_t context;
binding_context_init(&context, ambience);
TRY_SET(context.bound_module_map, new_heap_id_hash_map(runtime, 16));
TRY_DEF(modules, build_transitive_module_array(runtime, unbound_module));
TRY(build_fragment_entry_map(&context, modules));
TRY_DEF(schedule, build_binding_schedule(&context));
TRY(execute_binding_schedule(&context, schedule));
value_t path = get_unbound_module_path(unbound_module);
value_t result = get_id_hash_map_at(context.bound_module_map, path);
CHECK_FALSE("module missing", in_condition_cause(ccNotFound, result));
return result;
}
value_t add_methodspace_inheritance(runtime_t *runtime, value_t self,
value_t subtype, value_t supertype) {
CHECK_FAMILY(ofMethodspace, self);
CHECK_MUTABLE(self);
CHECK_FAMILY(ofType, subtype);
CHECK_FAMILY(ofType, supertype);
value_t inheritance = get_methodspace_inheritance(self);
value_t parents = get_id_hash_map_at(inheritance, subtype);
if (in_condition_cause(ccNotFound, parents)) {
// Make the parents buffer small since most types don't have many direct
// parents. If this fails nothing has happened.
TRY_SET(parents, new_heap_array_buffer(runtime, 4));
// If this fails we've wasted some space allocating the parents array but
// otherwise nothing has happened.
TRY(set_id_hash_map_at(runtime, inheritance, subtype, parents));
}
// If this fails we may have set the parents array of the subtype to an empty
// array which is awkward but okay.
invalidate_methodspace_caches(self);
return add_to_array_buffer(runtime, parents, supertype);
}
int pam_set_item (pam_handle_t *pamh, int item_type, const void *item)
{
int retval;
D(("called"));
IF_NO_PAMH("pam_set_item", pamh, PAM_SYSTEM_ERR);
retval = PAM_SUCCESS;
switch (item_type) {
case PAM_SERVICE:
/* Setting handlers_loaded to 0 will cause the handlers
* to be reloaded on the next call to a service module.
*/
pamh->handlers.handlers_loaded = 0;
TRY_SET(pamh->service_name, item);
{
char *tmp;
for (tmp=pamh->service_name; *tmp; ++tmp)
*tmp = tolower(*tmp); /* require lower case */
}
break;
case PAM_USER:
TRY_SET(pamh->user, item);
pamh->former.fail_user = PAM_SUCCESS;
break;
case PAM_USER_PROMPT:
TRY_SET(pamh->prompt, item);
pamh->former.fail_user = PAM_SUCCESS;
break;
case PAM_TTY:
D(("setting tty to %s", item));
TRY_SET(pamh->tty, item);
break;
case PAM_RUSER:
TRY_SET(pamh->ruser, item);
break;
case PAM_RHOST:
TRY_SET(pamh->rhost, item);
break;
case PAM_AUTHTOK:
/*
* PAM_AUTHTOK and PAM_OLDAUTHTOK are only accessible from
* modules.
*/
if (__PAM_FROM_MODULE(pamh)) {
if (pamh->authtok != item) {
_pam_overwrite(pamh->authtok);
TRY_SET(pamh->authtok, item);
}
} else {
retval = PAM_BAD_ITEM;
}
break;
case PAM_OLDAUTHTOK:
/*
* PAM_AUTHTOK and PAM_OLDAUTHTOK are only accessible from
* modules.
*/
if (__PAM_FROM_MODULE(pamh)) {
if (pamh->oldauthtok != item) {
_pam_overwrite(pamh->oldauthtok);
TRY_SET(pamh->oldauthtok, item);
}
} else {
retval = PAM_BAD_ITEM;
}
break;
case PAM_CONV: /* want to change the conversation function */
if (item == NULL) {
pam_syslog(pamh, LOG_ERR,
"pam_set_item: attempt to set conv() to NULL");
retval = PAM_PERM_DENIED;
} else {
struct pam_conv *tconv;
if ((tconv=
(struct pam_conv *) malloc(sizeof(struct pam_conv))
) == NULL) {
pam_syslog(pamh, LOG_CRIT,
"pam_set_item: malloc failed for pam_conv");
retval = PAM_BUF_ERR;
} else {
memcpy(tconv, item, sizeof(struct pam_conv));
_pam_drop(pamh->pam_conversation);
pamh->pam_conversation = tconv;
pamh->former.fail_user = PAM_SUCCESS;
}
}
break;
case PAM_FAIL_DELAY:
pamh->fail_delay.delay_fn_ptr = item;
break;
case PAM_XDISPLAY:
TRY_SET(pamh->xdisplay, item);
break;
case PAM_XAUTHDATA:
if (&pamh->xauth == item)
break;
if (pamh->xauth.namelen) {
_pam_overwrite(pamh->xauth.name);
free(pamh->xauth.name);
}
if (pamh->xauth.datalen) {
_pam_overwrite_n(pamh->xauth.data,
(unsigned int) pamh->xauth.datalen);
free(pamh->xauth.data);
}
pamh->xauth = *((const struct pam_xauth_data *) item);
if ((pamh->xauth.name=_pam_strdup(pamh->xauth.name)) == NULL) {
memset(&pamh->xauth, '\0', sizeof(pamh->xauth));
return PAM_BUF_ERR;
}
if ((pamh->xauth.data=_pam_memdup(pamh->xauth.data,
pamh->xauth.datalen)) == NULL) {
_pam_overwrite(pamh->xauth.name);
free(pamh->xauth.name);
memset(&pamh->xauth, '\0', sizeof(pamh->xauth));
return PAM_BUF_ERR;
}
break;
/* begin: add by yangguang */
default:
if (item_type > PAM_EXT_BASE)
{
retval = pam_set_extern_item_value (pamh, item_type, item);
}
else
{
retval = PAM_BAD_ITEM;
}
}/* end switch */
/* end: add by yangguang */
return retval;
}
