[PATCH] gdbserver: support Unix domain sockets
Yunlian Jiang
yunlian@google.com
Thu Mar 10 00:05:00 GMT 2016
This patch enables gdbserver to use Unix domain sockets if
the TCP sockets is not allowed to use. Wit this patch, user can
use "gdbserver +debug-socket --attach 123" to use Unix domain
sockets.
diff --git a/gdb/gdbserver/remote-utils.c b/gdb/gdbserver/remote-utils.c
index e751473..b00960d 100644
--- a/gdb/gdbserver/remote-utils.c
+++ b/gdb/gdbserver/remote-utils.c
@@ -62,6 +62,10 @@
#include <winsock2.h>
#endif
+#ifndef USE_WIN32API
+#include <sys/un.h>
+#endif
+
#if __QNX__
#include <sys/iomgr.h>
#endif /* __QNX__ */
@@ -288,6 +292,49 @@ remote_open (char *name)
{
char *port_str;
+ /* Enable gdbserver to use Unix domain sockets if applications aren't
+ allowed to bind to localhost TCP sockets.
+ Typical usage is "gdbserver +debug-socket --attach 123" */
+ if (name[0] == '+')
+ {
+#ifdef USE_WIN32API
+ error ("Only <host>:<port> is supported on this platform.");
+#else
+ struct sockaddr_un sockaddr;
+ socklen_t sockaddrlen;
+
+ listen_desc = socket (AF_UNIX, SOCK_STREAM, 0);
+ if (listen_desc == -1)
+ perror_with_name ("Can't create Unix domain socket");
+
+ /* Skip the initial '+'. */
+ name++;
+
+ memset (&sockaddr, 0, sizeof sockaddr);
+ sockaddr.sun_family = AF_UNIX;
+ snprintf(sockaddr.sun_path, sizeof (sockaddr.sun_path), "%s", name);
+ sockaddrlen = sizeof (sockaddr.sun_family) +
+ strlen (sockaddr.sun_path) + 1;
+
+ unlink (sockaddr.sun_path);
+
+ if (bind (listen_desc, (struct sockaddr *) &sockaddr, sockaddrlen)
+ || listen (listen_desc, 1))
+ perror_with_name ("Can't bind Unix domain socket");
+
+ fprintf (stderr, "Listening on Unix domain socket '%s'\n",
+ sockaddr.sun_path);
+ fflush (stderr);
+
+ /* Register the event loop handler. */
+ add_file_handler (listen_desc, handle_accept_event, NULL);
+
+ transport_is_reliable = 1;
+#endif
+
+ return;
+ }
+
port_str = strchr (name, ':');
#ifdef USE_WIN32API
if (port_str == NULL)
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