[review] Use cmd_list_element::doc_allocated for Python commands

[Tom Tromey (Code Review)]

Change URL: https://gnutoolchain-gerrit.osci.io/r/c/binutils-gdb/+/661
......................................................................

Use cmd_list_element::doc_allocated for Python commands

Python commands manage their "doc" string manually, but
cmd_list_element already has doc_allocated to handle this case.  This
changes the Python code to use the existing facility.

gdb/ChangeLog
2019-11-15  Tom Tromey  <tom@tromey.com>

	* python/py-cmd.c (cmdpy_destroyer): Don't free "doc".
	(cmdpy_init): Set "doc_allocated".

Change-Id: I0014edc117b051bba1f4db267687d231e7fe9b56
---
M gdb/ChangeLog
M gdb/python/py-cmd.c
2 files changed, 6 insertions(+), 1 deletion(-)



diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 90a2b64..bbef23a 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2019-11-15  Tom Tromey  <tom@tromey.com>
+
+	* python/py-cmd.c (cmdpy_destroyer): Don't free "doc".
+	(cmdpy_init): Set "doc_allocated".
+
 2019-11-15  Christian Biesinger  <cbiesinger@google.com>
 
 	* Makefile.in: Replace {posix,mingw}-strerror.c with safe-strerror.c.
diff --git a/gdb/python/py-cmd.c b/gdb/python/py-cmd.c
index 87d1888..5b9a810 100644
--- a/gdb/python/py-cmd.c
+++ b/gdb/python/py-cmd.c
@@ -101,7 +101,6 @@
   /* We allocated the name, doc string, and perhaps the prefix
      name.  */
   xfree ((char *) self->name);
-  xfree ((char *) self->doc);
   xfree ((char *) self->prefixname);
 }
 
@@ -563,6 +562,7 @@
       /* There appears to be no API to set this.  */
       cmd->func = cmdpy_function;
       cmd->destroyer = cmdpy_destroyer;
+      cmd->doc_allocated = 1;
 
       obj->command = cmd;
       set_cmd_context (cmd, self_ref.release ());

-- 
Gerrit-Project: binutils-gdb
Gerrit-Branch: master
Gerrit-Change-Id: I0014edc117b051bba1f4db267687d231e7fe9b56
Gerrit-Change-Number: 661
Gerrit-PatchSet: 1
Gerrit-Owner: Tom Tromey <tromey@sourceware.org>
Gerrit-MessageType: newchange