From: Joel Brobecker <brobecker@gnat.com>
Date: Fri, 16 Apr 2004 04:31:25 +0000 (+0000)
Subject:         * dwarf2read.c (dwarf2_attribute_true_p): New function.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=fdc860a37ed026dce4455748cda5cf50ff680ec7;p=binutils-gdb.git

    * dwarf2read.c (dwarf2_attribute_true_p): New function.
        (die_is_declaration): Use the function above.
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 18612817bf9..0335fcc19f9 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2004-04-15  Joel Brobecker  <brobecker@gnat.com>
+
+	* dwarf2read.c (dwarf2_attribute_true_p): New function.
+	(die_is_declaration): Use the function above. Add comment.
+
 2004-04-15  Joel Brobecker  <brobecker@gnat.com>
 
 	* dwarf2read.c (read_structure_scope): Identify stub types
diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index 09b0cc51c7b..8f988989cbf 100644
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -677,6 +677,9 @@ static void set_cu_language (unsigned int, struct dwarf2_cu *);
 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
 				      struct dwarf2_cu *);
 
+static int dwarf2_attribute_true_p (struct die_info *die, unsigned name,
+                                    struct dwarf2_cu *cu);
+
 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
 
 static struct die_info *die_specification (struct die_info *die,
@@ -5139,11 +5142,28 @@ dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
   return NULL;
 }
 
+/* Return non-zero iff the attribute NAME is defined for the given DIE,
+   and holds a non-zero value.  */
+
+static int
+dwarf2_attribute_true_p (struct die_info *die, unsigned name,
+                         struct dwarf2_cu *cu)
+{
+  struct attribute *attr = dwarf2_attr (die, name, cu);
+
+  return (attr && DW_UNSND (attr));
+}
+
 static int
 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
 {
-  return (dwarf2_attr (die, DW_AT_declaration, cu)
-	  && ! dwarf2_attr (die, DW_AT_specification, cu));
+  /* A DIE is a declaration if it has a DW_AT_declaration attribute
+     which value is non-zero.  However, we have to be careful of DIEs
+     with a DW_AT_specification attribute, because dwarf2_attribute_p()
+     follows this attribute, and therefore might cause us to find a
+     DW_AT_declaration attribute, but that belongs to a different DIE.  */
+  return (dwarf2_attribute_true_p (die, DW_AT_declaration, cu)
+	  && ! dwarf2_attribute_true_p (die, DW_AT_specification, cu));
 }
 
 /* Return the die giving the specification for DIE, if there is