/*
* Invalidate all symbols that are not alive at sampling start time.
*/
static void invalidate_earlybirds(unsigned long long start_time)
{
u32 i;
int flag;
struct jitentry * a;
flag = 0;
for (i = 0; i < entry_count; i++) {
a = entries_address_ascending[i];
if (a->life_end < start_time) {
invalidate_entry(a);
flag = 1;
}
}
if (flag) {
resort_address();
resort_symbol();
}
}
static void invalidate_zero_size_entries(void)
{
u32 i;
int flag;
struct jitentry * a;
flag = 0;
for (i = 0; i < entry_count; i++) {
a = entries_address_ascending[i];
if (a->code_size == 0) {
invalidate_entry(a);
flag = 1;
}
}
if (flag) {
resort_address();
resort_symbol();
}
}
static bool invalidate_entries(TALLOC_CTX *ctx,
struct sss_domain_info *dinfo,
enum sss_cache_entry entry_type,
const char *filter, const char *name)
{
const char *attrs[] = {SYSDB_NAME, NULL};
size_t msg_count;
struct ldb_message **msgs;
const char *type_string = "unknown";
errno_t ret = EINVAL;
int i;
const char *c_name;
bool iret;
if (!filter) return false;
switch (entry_type) {
case TYPE_USER:
type_string = "user";
ret = sysdb_search_users(ctx, dinfo,
filter, attrs, &msg_count, &msgs);
break;
case TYPE_GROUP:
type_string = "group";
ret = sysdb_search_groups(ctx, dinfo,
filter, attrs, &msg_count, &msgs);
break;
case TYPE_NETGROUP:
type_string = "netgroup";
ret = sysdb_search_netgroups(ctx, dinfo,
filter, attrs, &msg_count, &msgs);
break;
case TYPE_SERVICE:
type_string = "service";
ret = sysdb_search_services(ctx, dinfo,
filter, attrs, &msg_count, &msgs);
break;
case TYPE_AUTOFSMAP:
type_string = "autofs map";
ret = search_autofsmaps(ctx, dinfo, filter, attrs, &msg_count, &msgs);
break;
}
if (ret != EOK) {
if (ret == ENOENT) {
DEBUG(SSSDBG_TRACE_FUNC, "'%s' %s: Not found in domain '%s'\n",
type_string, name ? name : "", dinfo->name);
} else {
DEBUG(SSSDBG_CRIT_FAILURE,
"Searching for %s in domain %s with filter %s failed\n",
type_string, dinfo->name, filter);
}
return false;
}
iret = true;
for (i = 0; i < msg_count; i++) {
c_name = ldb_msg_find_attr_as_string(msgs[i], SYSDB_NAME, NULL);
if (c_name == NULL) {
DEBUG(SSSDBG_MINOR_FAILURE,
"Something bad happened, can't find attribute %s", SYSDB_NAME);
ERROR("Couldn't invalidate %1$s", type_string);
iret = false;
} else {
ret = invalidate_entry(ctx, dinfo, c_name, entry_type);
if (ret != EOK) {
DEBUG(SSSDBG_MINOR_FAILURE,
"Couldn't invalidate %s %s", type_string, c_name);
ERROR("Couldn't invalidate %1$s %2$s", type_string, c_name);
iret = false;
}
}
}
talloc_zfree(msgs);
return iret;
}
/*
* We decided to keep one entry in favor of the other. Instead of dropping
* the overlapping entry we split or truncate it to not overlap any more.
*
* Looking on the address regions, we may have the following situation:
*
* split: |------------|
* keep: |---|
*
* The split entry may be splitted in a left part and a right part. E.g.:
*
* split0/1: |--| |---|
* keep: |---|
*
* However, both parts may or may not exist.
*/
static void split_entry(struct jitentry * split, struct jitentry const * keep)
{
unsigned long long start_addr_keep = keep->vma;
unsigned long long end_addr_keep = keep->vma + keep->code_size;
unsigned long long end_addr_split = split->vma + split->code_size;
unsigned long long start_addr_split = split->vma;
// do we need a right part?
if (end_addr_split > end_addr_keep) {
struct jitentry * new_entry =
xcalloc(1, sizeof(struct jitentry));
char * s = NULL;
/* Check for max. length to avoid possible integer overflow. */
if (strlen(split->symbol_name) > SIZE_MAX - 3) {
fprintf(stderr, "Length of symbol name is too large.\n");
exit(EXIT_FAILURE);
} else {
s = xmalloc(strlen(split->symbol_name) + 3);
strcpy(s, split->symbol_name);
strcat(s, "#1");
}
new_entry->vma = end_addr_keep;
new_entry->code_size = end_addr_split - end_addr_keep;
new_entry->symbol_name = s;
new_entry->sym_name_malloced = 1;
new_entry->life_start = split->life_start;
new_entry->life_end = split->life_end;
// the right part does not have an associated code, because we
// don't know whether the split part begins at an opcode
new_entry->code = NULL;
verbprintf(debug, "split right (new) name=%s, start=%llx,"
" end=%llx\n", new_entry->symbol_name,
new_entry->vma,
new_entry->vma + new_entry->code_size);
insert_entry(new_entry);
}
// do we need a left part?
if (start_addr_split < start_addr_keep) {
char * s = NULL;
/* Check for max. length to avoid possible integer overflow. */
if (strlen(split->symbol_name) > SIZE_MAX - 3) {
fprintf(stderr, "Length of symbol name is too large.\n");
exit(EXIT_FAILURE);
} else {
s = xmalloc(strlen(split->symbol_name) + 3);
strcpy(s, split->symbol_name);
strcat(s, "#0");
}
split->code_size = start_addr_keep - start_addr_split;
if (split->sym_name_malloced)
free(split->symbol_name);
split->symbol_name = s;
split->sym_name_malloced = 1;
verbprintf(debug, "split left name=%s, start=%llx, end=%llx\n",
split->symbol_name, split->vma,
split->vma + split->code_size);
} else {
invalidate_entry(split);
}
}
