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/*
SSSD
Common utilities for check-based tests using talloc.
Authors:
Martin Nagy <mnagy@redhat.com>
Copyright (C) Red Hat, Inc 2009
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include "tests/common.h"
#include "util/util.h"
#include "util/dlinklist.h"
TALLOC_CTX *global_talloc_context = NULL;
char leak_err_msg[256];
struct size_snapshot {
struct size_snapshot *prev;
struct size_snapshot *next;
TALLOC_CTX *ctx;
size_t bytes_allocated;
};
static struct size_snapshot *snapshot_stack;
#define _set_leak_err_msg(fmt, ...) do { \
snprintf(leak_err_msg, sizeof(leak_err_msg), \
fmt, ##__VA_ARGS__); \
} while(0);
const char *check_leaks_err_msg(void)
{
return leak_err_msg;
}
static bool
check_leaks(TALLOC_CTX *ctx, size_t bytes, const char *location)
{
size_t bytes_allocated;
if (ctx == NULL) {
return false;
}
bytes_allocated = talloc_total_size(ctx);
if (bytes_allocated != bytes) {
fprintf(stderr, "Leak report for %s:\n", location);
talloc_report_full(ctx, stderr);
_set_leak_err_msg("%s: memory leaks detected, %zd bytes still allocated",
location, bytes_allocated - bytes);
return false;
}
return true;
}
void
check_leaks_push(TALLOC_CTX *ctx)
{
struct size_snapshot *snapshot;
snapshot = talloc(NULL, struct size_snapshot);
snapshot->ctx = ctx;
snapshot->bytes_allocated = talloc_total_size(ctx);
DLIST_ADD(snapshot_stack, snapshot);
}
bool
_check_leaks_pop(TALLOC_CTX *ctx, const char *location)
{
struct size_snapshot *snapshot;
TALLOC_CTX *old_ctx;
size_t bytes_allocated;
if (ctx == NULL) {
return false;
}
if (snapshot_stack == NULL) {
_set_leak_err_msg("%s: trying to pop an empty stack", location);
return false;
}
snapshot = snapshot_stack;
DLIST_REMOVE(snapshot_stack, snapshot);
old_ctx = snapshot->ctx;
bytes_allocated = snapshot->bytes_allocated;
if (old_ctx != ctx) {
_set_leak_err_msg("Bad push/pop order");
return false;
}
talloc_zfree(snapshot);
return check_leaks(old_ctx, bytes_allocated, location);
}
bool
leak_check_setup(void)
{
talloc_enable_null_tracking();
global_talloc_context = talloc_new(NULL);
if (global_talloc_context == NULL) {
_set_leak_err_msg("talloc_new failed");
return false;
}
check_leaks_push(global_talloc_context);
return true;
}
bool
leak_check_teardown(void)
{
bool res;
res = check_leaks_pop(global_talloc_context);
if (!res) {
_set_leak_err_msg("check_leaks_pop failed in leak_check_teardown");
}
if (snapshot_stack != NULL) {
_set_leak_err_msg("Exiting with a non-empty stack");
return false;
}
res = check_leaks(global_talloc_context, 0, __location__);
talloc_disable_null_tracking();
talloc_free(global_talloc_context);
return res;
}
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