DeforaNetworks/zzuf
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libzzuf: protect library initialisation with a mutex.

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This commit is contained in:
Sam Hocevar 2015-01-29 02:21:08 +01:00
parent cc2cb7e305
commit bad2925778
1 changed files with 13 additions and 7 deletions
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20
src/libzzuf/libzzuf.c
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@ -49,6 +49,7 @@
#include "network.h"
#include "sys.h"
#include "fuzz.h"
#include "util/mutex.h"
#if defined HAVE_WINDOWS_H
BOOL WINAPI DllMain(HINSTANCE, DWORD, PVOID);
@ -107,14 +108,19 @@ int g_network_fuzzing = 0;
*/
void libzzuf_init(void)
{
static int initializing = 0;
char *tmp, *tmp2;
/* Make sure we don't get initialised more than once */
if (initializing++)
static zzuf_mutex_t mutex = 0;
static int initialised = 0;
zzuf_mutex_lock(&mutex);
if (initialised++)
{
zzuf_mutex_unlock(&mutex);
return;
}
zzuf_mutex_unlock(&mutex);
tmp = getenv("ZZUF_DEBUG");
/* Open the debug channel */
char *tmp = getenv("ZZUF_DEBUG");
if (tmp)
g_debug_level = atoi(tmp);
@ -126,7 +132,7 @@ void libzzuf_init(void)
g_debug_fd = atoi(tmp);
#endif
/* We need this as soon as possible */
/* We need malloc() and a few others as soon as possible */
_zz_mem_init();
tmp = getenv("ZZUF_SEED");
@ -134,7 +140,7 @@ void libzzuf_init(void)
zzuf_set_seed(atol(tmp));
tmp = getenv("ZZUF_MINRATIO");
tmp2 = getenv("ZZUF_MAXRATIO");
char *tmp2 = getenv("ZZUF_MAXRATIO");
if (tmp && *tmp && tmp2 && *tmp2)
zzuf_set_ratio(atof(tmp), atof(tmp2));