port: Add pthread_setname_np FreeBSD compat
[lttng-tools.git] / src / common / compat / pthread.h
index 87aa746ba13e68e624b57d1c433d0da0c44d2c61..511ab089b3ed975c00cbb84e229b9c17c2bb2e22 100644 (file)
 
 #include <pthread.h>
 #include <common/compat/errno.h>
+#include <string.h>
+
+#define LTTNG_PTHREAD_NAMELEN 16
 
 #if defined(HAVE_PTHREAD_SETNAME_NP_WITH_TID)
 static inline
 int lttng_pthread_setname_np(const char *name)
 {
+       /*
+        * Some implementations don't error out, replicate this behavior for
+        * consistency.
+        */
+       if (strnlen(name, LTTNG_PTHREAD_NAMELEN) >= LTTNG_PTHREAD_NAMELEN) {
+               return ERANGE;
+       }
+
        return pthread_setname_np(pthread_self(), name);
 }
+
+static inline
+int lttng_pthread_getname_np(char *name, size_t len)
+{
+       return pthread_getname_np(pthread_self(), name, len);
+}
 #elif defined(HAVE_PTHREAD_SETNAME_NP_WITHOUT_TID)
 static inline
 int lttng_pthread_setname_np(const char *name)
 {
        return pthread_setname_np(name);
 }
+
+static inline
+int lttng_pthread_getname_np(char *name, size_t len)
+{
+       return pthread_getname_np(name, len);
+}
+#elif defined(HAVE_PTHREAD_SET_NAME_NP_WITH_TID)
+
+#include <pthread_np.h>
+static inline
+int lttng_pthread_setname_np(const char *name)
+{
+       /* Replicate pthread_setname_np's behavior. */
+       if (strnlen(name, LTTNG_PTHREAD_NAMELEN) >= LTTNG_PTHREAD_NAMELEN) {
+               return ERANGE;
+       }
+
+       pthread_set_name_np(pthread_self(), name);
+       return 0;
+}
+
+static inline
+int lttng_pthread_getname_np(char *name, size_t len)
+{
+       pthread_get_name_np(pthread_self(), name, len);
+       return 0;
+}
+#elif defined(__linux__)
+
+/* Fallback on prtctl on Linux */
+#include <sys/prctl.h>
+
+static inline
+int lttng_pthread_setname_np(const char *name)
+{
+       /* Replicate pthread_setname_np's behavior. */
+       if (strnlen(name, LTTNG_UST_ABI_PROCNAME_LEN) >= LTTNG_UST_ABI_PROCNAME_LEN) {
+               return ERANGE;
+       }
+       return prctl(PR_SET_NAME, name, 0, 0, 0);
+}
+
+static inline
+int lttng_pthread_getname_np(char *name, size_t len)
+{
+       return prctl(PR_GET_NAME, name, 0, 0, 0);
+}
 #else
 /*
  * For platforms without thread name support, do nothing.
@@ -32,6 +96,12 @@ int lttng_pthread_setname_np(const char *name)
 {
        return -ENOSYS;
 }
+
+static inline
+int lttng_pthread_getname_np(char *name, size_t len)
+{
+       return -ENOSYS;
+}
 #endif
 
 #endif /* _COMPAT_PTHREAD_H */
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