gdb/thread.py:Remove dependence on g_current_regs

Signed-off-by: anjiahao <anjiahao@xiaomi.com>

fs/procfs/fs_procfstcbinfo.c

@@ -176,6 +176,20 @@ static int tcbinfo_close(FAR struct file *filep)
   return OK;
 }
 
+/****************************************************************************
+ * Name: tcbinfo_current_regs
+ *
+ * Description:
+ *   A special version of up_current_regs() that is non-optimized.
+ *
+ ****************************************************************************/
+
+nooptimiziation_function
+FAR static void *tcbinfo_current_regs(void)
+{
+  return up_current_regs();
+}
+
 /****************************************************************************
  * Name: tcbinfo_read
  ****************************************************************************/
@@ -198,8 +212,9 @@ static ssize_t tcbinfo_read(FAR struct file *filep, FAR char *buffer,
   if (filep->f_pos == 0)
     {
       linesize = procfs_snprintf(attr->line, TCBINFO_LINELEN,
-                                 "pointer %p size %zu\n", &g_tcbinfo,
+                                 "pointer %p size %zu current regs %p\n",
-                                  sizeof(struct tcbinfo_s));
+                                  &g_tcbinfo, sizeof(struct tcbinfo_s),
+                                  tcbinfo_current_regs());
 
       /* Save the linesize in case we are re-entered with f_pos > 0 */
 

include/nuttx/compiler.h

@@ -264,7 +264,11 @@
 
 /* The nooptimiziation_function attribute no optimize */
 
-#  define nooptimiziation_function __attribute__((optimize(0)))
+#  if defined(__clang__)
+#    define nooptimiziation_function __attribute__((optnone))
+#  else
+#    define nooptimiziation_function __attribute__((optimize("O0")))
+#  endif
 
 /* The nosanitize_address attribute informs GCC don't sanitize it */
 

tools/gdb/thread.py

@@ -82,7 +82,8 @@ class Nxsetregs(gdb.Command):
         super(Nxsetregs, self).__init__("nxsetregs", gdb.COMMAND_USER)
 
     def invoke(self, args, from_tty):
-        current_regs = gdb.parse_and_eval("g_current_regs")
+        gdb.execute("set $_current_regs=tcbinfo_current_regs()")
+        current_regs = gdb.parse_and_eval("$_current_regs")
         tcbinfo = gdb.parse_and_eval("g_tcbinfo")
         arg = args.split(" ")
 
@@ -91,16 +92,7 @@ class Nxsetregs(gdb.Command):
                 gdb.lookup_type("char").pointer()
             )
         else:
-            if utils.is_target_smp():
+            regs = current_regs.cast(gdb.lookup_type("char").pointer())
-                gdb.execute("set $_index=up_cpu_index()")
-                index = gdb.parse_and_eval("$_index")
-            else:
-                index = 0
-
-            if current_regs[index] == 0:
-                return
-
-            regs = current_regs[index].cast(gdb.lookup_type("char").pointer())
 
         if regs == 0:
             gdb.write("regs is NULL\n")