Implement 'catch syscall' for gdbserver

[deliverable/binutils-gdb.git] / gdb / gdbserver / server.c

diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
index fe7195ddab0949883dc034db02983079c3a5e7d8..301dea9ee0330b5ce04aa4ba41a4e71a60cb3fdb 100644 (file)
--- a/gdb/gdbserver/server.c
+++ b/gdb/gdbserver/server.c
@@ -420,7 +420,7 @@ handle_btrace_enable_bts (struct thread_info *thread)
   return NULL;
 }
 
-/* Handle btrace enabling in Intel(R) Processor Trace format.  */
+/* Handle btrace enabling in Intel Processor Trace format.  */
 
 static const char *
 handle_btrace_enable_pt (struct thread_info *thread)
@@ -624,6 +624,54 @@ handle_general_set (char *own_buf)
       return;
     }
 
+  if (startswith (own_buf, "QCatchSyscalls:"))
+    {
+      const char *p = own_buf + sizeof ("QCatchSyscalls:") - 1;
+      int enabled = -1;
+      CORE_ADDR sysno;
+      struct process_info *process;
+
+      if (!target_running () || !target_supports_catch_syscall ())
+       {
+         write_enn (own_buf);
+         return;
+       }
+
+      if (strcmp (p, "0") == 0)
+       enabled = 0;
+      else if (p[0] == '1' && (p[1] == ';' || p[1] == '\0'))
+       enabled = 1;
+      else
+       {
+         fprintf (stderr, "Unknown catch-syscalls mode requested: %s\n",
+                  own_buf);
+         write_enn (own_buf);
+         return;
+       }
+
+      process = current_process ();
+      VEC_truncate (int, process->syscalls_to_catch, 0);
+
+      if (enabled)
+       {
+         p += 1;
+         if (*p == ';')
+           {
+             p += 1;
+             while (*p != '\0')
+               {
+                 p = decode_address_to_semicolon (&sysno, p);
+                 VEC_safe_push (int, process->syscalls_to_catch, (int) sysno);
+               }
+           }
+         else
+           VEC_safe_push (int, process->syscalls_to_catch, ANY_SYSCALL);
+       }
+
+      write_ok (own_buf);
+      return;
+    }
+
   if (strcmp (own_buf, "QStartNoAckMode") == 0)
     {
       if (remote_debug)
@@ -805,7 +853,7 @@ get_features_xml (const char *annex)
   return NULL;
 }
 
-void
+static void
 monitor_show_help (void)
 {
   monitor_output ("The following monitor commands are supported:\n");
@@ -1966,7 +2014,7 @@ supported_btrace_packets (char *buf)
 
 /* Handle all of the extended 'q' packets.  */
 
-void
+static void
 handle_query (char *own_buf, int packet_len, int *new_packet_len_p)
 {
   static struct inferior_list_entry *thread_ptr;
@@ -2200,6 +2248,9 @@ handle_query (char *own_buf, int packet_len, int *new_packet_len_p)
               "PacketSize=%x;QPassSignals+;QProgramSignals+",
               PBUFSIZ - 1);
 
+      if (target_supports_catch_syscall ())
+       strcat (own_buf, ";QCatchSyscalls+");
+
       if (the_target->qxfer_libraries_svr4 != NULL)
        strcat (own_buf, ";qXfer:libraries-svr4:read+"
                ";augmented-libraries-svr4-read+");
@@ -2568,7 +2619,7 @@ handle_pending_status (const struct thread_resume *resumption,
 }
 
 /* Parse vCont packets.  */
-void
+static void
 handle_v_cont (char *own_buf)
 {
   char *p, *q;
@@ -2735,7 +2786,7 @@ resume (struct thread_resume *actions, size_t num_actions)
 }
 
 /* Attach to a new program.  Return 1 if successful, 0 if failure.  */
-int
+static int
 handle_v_attach (char *own_buf)
 {
   int pid;
@@ -2858,7 +2909,7 @@ handle_v_run (char *own_buf)
 }
 
 /* Kill process.  Return 1 if successful, 0 if failure.  */
-int
+static int
 handle_v_kill (char *own_buf)
 {
   int pid;
@@ -2884,7 +2935,7 @@ handle_v_kill (char *own_buf)
 }
 
 /* Handle all of the extended 'v' packets.  */
-void
+static void
 handle_v_requests (char *own_buf, int packet_len, int *new_packet_len)
 {
   if (!disable_packet_vCont)