Use gdbarch obstack to allocate the TYPE_NAME string in arch_type

Since the type whose name is being set is now being allocated on the
gdbarch obstack, we should allocate its TYPE_NAME on the obstack too.
This reduces the number of individual valgrind warnings for the command
"gdb gdb" from ~300 to ~150.

Tested on x86_64-unknown-linux-gnu.

gdb/ChangeLog:

	* gdb_obstack.h (obstack_strdup): Declare.
	* gdb_obstack.c (obstack_strdup): Define.
	* gdbarch.sh (gdbarch_obstack_strdup): Declare and define.
	* gdbarch.c: Regenerate.
	* gdbarch.h: Regenerate.
	* gdbtypes.c (arch_type): Use gdbarch_obstack_strdup.

7 files changed, 51 insertions, 1 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 11997e6..f8b6874 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,14 @@
 2015-09-02  Patrick Palka  <patrick@parcs.ath.cx>
 
+	* gdb_obstack.h (obstack_strdup): Declare.
+	* gdb_obstack.c (obstack_strdup): Define.
+	* gdbarch.sh (gdbarch_obstack_strdup): Declare and define.
+	* gdbarch.c: Regenerate.
+	* gdbarch.h: Regenerate.
+	* gdbtypes.c (arch_type): Use gdbarch_obstack_strdup.
+
+2015-09-02  Patrick Palka  <patrick@parcs.ath.cx>
+
 	* gdbtypes.c (copy_type_recursive): Update documentation.
 
 2015-09-01  Sergio Durigan Junior  <sergiodj@redhat.com>
diff --git a/gdb/gdb_obstack.c b/gdb/gdb_obstack.c
index b972eab..d8d03df 100644
--- a/gdb/gdb_obstack.c
+++ b/gdb/gdb_obstack.c
@@ -45,3 +45,13 @@ obconcat (struct obstack *obstackp, ...)
 
   return obstack_finish (obstackp);
 }
+
+/* See gdb_obstack.h.  */
+
+char *
+obstack_strdup (struct obstack *obstackp, const char *string)
+{
+  char *obstring = obstack_alloc (obstackp, strlen (string) + 1);
+  strcpy (obstring, string);
+  return obstring;
+}
diff --git a/gdb/gdb_obstack.h b/gdb/gdb_obstack.h
index 826c8b2..3272721 100644
--- a/gdb/gdb_obstack.h
+++ b/gdb/gdb_obstack.h
@@ -58,4 +58,9 @@
 
 extern char *obconcat (struct obstack *obstackp, ...) ATTRIBUTE_SENTINEL;
 
+/* Duplicate STRING, returning an equivalent string that's allocated on the
+   obstack OBSTACKP.  */
+
+extern char *obstack_strdup (struct obstack *obstackp, const char *string);
+
 #endif
diff --git a/gdb/gdbarch.c b/gdb/gdbarch.c
index 0d4142b..f04eef9 100644
--- a/gdb/gdbarch.c
+++ b/gdb/gdbarch.c
@@ -449,6 +449,14 @@ gdbarch_obstack_zalloc (struct gdbarch *arch, long size)
   return data;
 }
 
+/* See gdbarch.h.  */
+
+char *
+gdbarch_obstack_strdup (struct gdbarch *arch, const char *string)
+{
+  return obstack_strdup (arch->obstack, string);
+}
+
 
 /* Free a gdbarch struct.  This should never happen in normal
    operation --- once you've created a gdbarch, you keep it around.
diff --git a/gdb/gdbarch.h b/gdb/gdbarch.h
index 7df37c9..82e0259 100644
--- a/gdb/gdbarch.h
+++ b/gdb/gdbarch.h
@@ -1618,6 +1618,11 @@ extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
 #define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
 #define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
 
+/* Duplicate STRING, returning an equivalent string that's allocated on the
+   obstack associated with GDBARCH.  The string is freed when the corresponding
+   architecture is also freed.  */
+
+extern char *gdbarch_obstack_strdup (struct gdbarch *arch, const char *string);
 
 /* Helper function.  Force an update of the current architecture.
 
diff --git a/gdb/gdbarch.sh b/gdb/gdbarch.sh
index 34e6a74..388920f 100755
--- a/gdb/gdbarch.sh
+++ b/gdb/gdbarch.sh
@@ -1486,6 +1486,11 @@ extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
 #define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
 #define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
 
+/* Duplicate STRING, returning an equivalent string that's allocated on the
+   obstack associated with GDBARCH.  The string is freed when the corresponding
+   architecture is also freed.  */
+
+extern char *gdbarch_obstack_strdup (struct gdbarch *arch, const char *string);
 
 /* Helper function.  Force an update of the current architecture.
 
@@ -1791,6 +1796,14 @@ gdbarch_obstack_zalloc (struct gdbarch *arch, long size)
   return data;
 }
 
+/* See gdbarch.h.  */
+
+char *
+gdbarch_obstack_strdup (struct gdbarch *arch, const char *string)
+{
+  return obstack_strdup (arch->obstack, string);
+}
+
 
 /* Free a gdbarch struct.  This should never happen in normal
    operation --- once you've created a gdbarch, you keep it around.
diff --git a/gdb/gdbtypes.c b/gdb/gdbtypes.c
index 7a18bed..12ff014 100644
--- a/gdb/gdbtypes.c
+++ b/gdb/gdbtypes.c
@@ -4549,7 +4549,7 @@ arch_type (struct gdbarch *gdbarch,
   TYPE_LENGTH (type) = length;
 
   if (name)
-    TYPE_NAME (type) = xstrdup (name);
+    TYPE_NAME (type) = gdbarch_obstack_strdup (gdbarch, name);
 
   return type;
 }