diff options
Diffstat (limited to 'erts/emulator/beam/erl_mtrace.c')
| -rw-r--r-- | erts/emulator/beam/erl_mtrace.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/erts/emulator/beam/erl_mtrace.c b/erts/emulator/beam/erl_mtrace.c index e275867928..bb6f8660f1 100644 --- a/erts/emulator/beam/erl_mtrace.c +++ b/erts/emulator/beam/erl_mtrace.c @@ -572,7 +572,7 @@ void erts_mtrace_pre_init(void) void erts_mtrace_init(char *receiver, char *nodename) { - char hostname[MAXHOSTNAMELEN]; + char hostname[MAXHOSTNAMELEN + 1]; char pid[21]; /* enough for a 64 bit number */ socket_desc = ERTS_SOCK_INVALID_SOCKET; @@ -613,9 +613,10 @@ void erts_mtrace_init(char *receiver, char *nodename) } tracep = trace_buffer; endp = trace_buffer + TRACE_BUF_SZ; - if (erts_sock_gethostname(hostname, MAXHOSTNAMELEN) != 0) + /* gethostname requires that the len is max(hostname) + 1 */ + if (erts_sock_gethostname(hostname, MAXHOSTNAMELEN + 1) != 0) hostname[0] = '\0'; - hostname[MAXHOSTNAMELEN-1] = '\0'; + hostname[MAXHOSTNAMELEN] = '\0'; sys_get_pid(pid, sizeof(pid)); write_trace_header(nodename ? nodename : "", pid, hostname); erts_mtrace_update_heap_size(); |