vla: resolve dynamic bounds if value contents is a constant byte-sequence

A variable location might be a constant value and therefore no inferior memory
access is needed to read the content. In this case try to resolve the type
bounds.

	* findvar.c (default_read_var_value): Resolve dynamic bounds if location
	points to a constant blob.

1 files changed, 11 insertions, 1 deletions

diff --git a/gdb/findvar.c b/gdb/findvar.c
index a2a7bb7d6d6..998a799e3be 100644
--- a/gdb/findvar.c
+++ b/gdb/findvar.c
@@ -437,7 +437,12 @@ default_read_var_value (struct symbol *var, struct frame_info *frame)
   switch (SYMBOL_CLASS (var))
     {
     case LOC_CONST:
-      /* Put the constant back in target format.  */
+      if (is_dynamic_type (type))
+	{
+	  /* Value is a constant byte-sequence and needs no memory access.  */
+	  type = resolve_dynamic_type (type, /* Unused address.  */ 0);
+	}
+      /* Put the constant back in target format. */
       v = allocate_value (type);
       store_signed_integer (value_contents_raw (v), TYPE_LENGTH (type),
 			    gdbarch_byte_order (get_type_arch (type)),
@@ -464,6 +469,11 @@ default_read_var_value (struct symbol *var, struct frame_info *frame)
       return v;
 
     case LOC_CONST_BYTES:
+      if (is_dynamic_type (type))
+	{
+	  /* Value is a constant byte-sequence and needs no memory access.  */
+	  type = resolve_dynamic_type (type, /* Unused address.  */ 0);
+	}
       v = allocate_value (type);
       memcpy (value_contents_raw (v), SYMBOL_VALUE_BYTES (var),
 	      TYPE_LENGTH (type));