gdb/guile: Have gdbscm_safe_source_script return a unique_ptr

Change gdbscm_safe_source_script to return a
gdb::unique_xmalloc_ptr<char> instead of a raw char*.  Update the
users of this function.

There should be no user visible change after this commit.

gdb/ChangeLog:

	* guile/guile-internal.h (gdbscm_safe_source_script): Change
	function return type.
	* guile/guile.c (gdbscm_source_script): Update to handle change in
	gdbscm_safe_source_script.
	* guile/scm-objfile.c (gdbscm_source_objfile_script): Likewise.
	* guile/scm-safe-call.c (gdbscm_safe_source_script): Change return
	type.

5 files changed, 18 insertions, 15 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 6633ac5..4e57a16 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,13 @@
+2021-05-07  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* guile/guile-internal.h (gdbscm_safe_source_script): Change
+	function return type.
+	* guile/guile.c (gdbscm_source_script): Update to handle change in
+	gdbscm_safe_source_script.
+	* guile/scm-objfile.c (gdbscm_source_objfile_script): Likewise.
+	* guile/scm-safe-call.c (gdbscm_safe_source_script): Change return
+	type.
+
 2021-05-06  Simon Marchi  <simon.marchi@polymtl.ca>
 
 	* inferior.h (class inferior) <args>: Change type to
diff --git a/gdb/guile/guile-internal.h b/gdb/guile/guile-internal.h
index c48547a..73fa380 100644
--- a/gdb/guile/guile-internal.h
+++ b/gdb/guile/guile-internal.h
@@ -408,7 +408,8 @@ extern SCM gdbscm_unsafe_call_1 (SCM proc, SCM arg0);
 extern gdb::unique_xmalloc_ptr<char> gdbscm_safe_eval_string
   (const char *string, int display_result);
 
-extern char *gdbscm_safe_source_script (const char *filename);
+extern gdb::unique_xmalloc_ptr<char> gdbscm_safe_source_script
+  (const char *filename);
 
 extern void gdbscm_enter_repl (void);
 
diff --git a/gdb/guile/guile.c b/gdb/guile/guile.c
index c6959f5..71d61f3 100644
--- a/gdb/guile/guile.c
+++ b/gdb/guile/guile.c
@@ -270,13 +270,10 @@ static void
 gdbscm_source_script (const struct extension_language_defn *extlang,
 		      FILE *file, const char *filename)
 {
-  char *msg = gdbscm_safe_source_script (filename);
+  gdb::unique_xmalloc_ptr<char> msg = gdbscm_safe_source_script (filename);
 
   if (msg != NULL)
-    {
-      fprintf_filtered (gdb_stderr, "%s\n", msg);
-      xfree (msg);
-    }
+    fprintf_filtered (gdb_stderr, "%s\n", msg.get ());
 }
 
 /* (execute string [#:from-tty boolean] [#:to-string boolean])
diff --git a/gdb/guile/scm-objfile.c b/gdb/guile/scm-objfile.c
index 30e63f3..cc8bbe6 100644
--- a/gdb/guile/scm-objfile.c
+++ b/gdb/guile/scm-objfile.c
@@ -310,16 +310,11 @@ gdbscm_source_objfile_script (const struct extension_language_defn *extlang,
 			      struct objfile *objfile, FILE *file,
 			      const char *filename)
 {
-  char *msg;
-
   ofscm_current_objfile = objfile;
 
-  msg = gdbscm_safe_source_script (filename);
+  gdb::unique_xmalloc_ptr<char> msg = gdbscm_safe_source_script (filename);
   if (msg != NULL)
-    {
-      fprintf_filtered (gdb_stderr, "%s", msg);
-      xfree (msg);
-    }
+    fprintf_filtered (gdb_stderr, "%s", msg.get ());
 
   ofscm_current_objfile = NULL;
 }
diff --git a/gdb/guile/scm-safe-call.c b/gdb/guile/scm-safe-call.c
index 2a38d63..fea4e52 100644
--- a/gdb/guile/scm-safe-call.c
+++ b/gdb/guile/scm-safe-call.c
@@ -431,7 +431,7 @@ scscm_source_scheme_script (void *data)
    printed according to "set guile print-stack" and the result is an error
    message allocated with malloc, caller must free.  */
 
-char *
+gdb::unique_xmalloc_ptr<char>
 gdbscm_safe_source_script (const char *filename)
 {
   /* scm_c_primitive_load_path only looks in %load-path for files with
@@ -452,7 +452,7 @@ gdbscm_safe_source_script (const char *filename)
 			      (void *) filename);
 
   if (result != NULL)
-    return xstrdup (result);
+    return make_unique_xstrdup (result);
   return NULL;
 }