From 3ea16160a66e0e3bc59842e27e41890411729a86 Mon Sep 17 00:00:00 2001 From: Tom Tromey Date: Fri, 15 Nov 2019 16:56:20 -0700 Subject: [PATCH] Let commands free "name" This adds a "name_allocated" field to cmd_list_element, so that commands can own their "name" when necessary. Then, this changes a few spots in gdb that currently free the name by hand to instead use this facility. gdb/ChangeLog 2019-11-26 Tom Tromey * python/py-function.c (fnpy_init): Update. * value.h (add_internal_function): Adjust declaration. * value.c (function_destroyer): Remove. (do_add_internal_function): Don't set destroyer or copy name. (add_internal_function): Take unique_xmalloc_ptr for name. Set name_allocated. * python/py-cmd.c (cmdpy_destroyer): Don't free "name". (cmdpy_init): Set name_allocated. * cli/cli-decode.h (struct cmd_list_element) : New member. (~cmd_list_element): Free "name" if needed. Change-Id: Ie1435cea5bbf4bd92056125f112917c607cbb761 --- gdb/ChangeLog | 14 ++++++++++++++ gdb/cli/cli-decode.h | 7 +++++++ gdb/python/py-cmd.c | 4 ++-- gdb/python/py-function.c | 4 ++-- gdb/value.c | 21 ++++++--------------- gdb/value.h | 2 +- 6 files changed, 32 insertions(+), 20 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 3d8d582d651..d2e9adf3430 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,17 @@ +2019-11-26 Tom Tromey + + * python/py-function.c (fnpy_init): Update. + * value.h (add_internal_function): Adjust declaration. + * value.c (function_destroyer): Remove. + (do_add_internal_function): Don't set destroyer or copy name. + (add_internal_function): Take unique_xmalloc_ptr for name. + Set name_allocated. + * python/py-cmd.c (cmdpy_destroyer): Don't free "name". + (cmdpy_init): Set name_allocated. + * cli/cli-decode.h (struct cmd_list_element) : New + member. + (~cmd_list_element): Free "name" if needed. + 2019-11-26 Tom Tromey * value.h (add_internal_function): Add new overload. Move diff --git a/gdb/cli/cli-decode.h b/gdb/cli/cli-decode.h index 2ec4a97d813..8ea40597b07 100644 --- a/gdb/cli/cli-decode.h +++ b/gdb/cli/cli-decode.h @@ -55,6 +55,7 @@ struct cmd_list_element deprecated_warn_user (0), malloced_replacement (0), doc_allocated (0), + name_allocated (0), hook_in (0), allow_unknown (0), abbrev_flag (0), @@ -69,6 +70,8 @@ struct cmd_list_element { if (doc && doc_allocated) xfree ((char *) doc); + if (name_allocated) + xfree ((char *) name); } DISABLE_COPY_AND_ASSIGN (cmd_list_element); @@ -109,6 +112,10 @@ struct cmd_list_element unsigned int doc_allocated : 1; + /* Set if the name field should be xfree'd. */ + + unsigned int name_allocated : 1; + /* Flag that specifies if this command is already running its hook. */ /* Prevents the possibility of hook recursion. */ unsigned int hook_in : 1; diff --git a/gdb/python/py-cmd.c b/gdb/python/py-cmd.c index e3497d6f928..38973401a8f 100644 --- a/gdb/python/py-cmd.c +++ b/gdb/python/py-cmd.c @@ -98,8 +98,7 @@ cmdpy_destroyer (struct cmd_list_element *self, void *context) gdbpy_ref cmd ((cmdpy_object *) context); cmd->command = NULL; - /* We allocated the name and perhaps the prefix name. */ - xfree ((char *) self->name); + /* We may have allocated the prefix name. */ xfree ((char *) self->prefixname); } @@ -562,6 +561,7 @@ cmdpy_init (PyObject *self, PyObject *args, PyObject *kw) cmd->func = cmdpy_function; cmd->destroyer = cmdpy_destroyer; cmd->doc_allocated = 1; + cmd->name_allocated = 1; obj->command = cmd; set_cmd_context (cmd, self_ref.release ()); diff --git a/gdb/python/py-function.c b/gdb/python/py-function.c index 1c4588780e2..d94610573ef 100644 --- a/gdb/python/py-function.c +++ b/gdb/python/py-function.c @@ -127,8 +127,8 @@ fnpy_init (PyObject *self, PyObject *args, PyObject *kwds) if (! docstring) docstring.reset (xstrdup (_("This function is not documented."))); - add_internal_function (name, std::move (docstring), fnpy_call, - self_ref.release ()); + add_internal_function (make_unique_xstrdup (name), std::move (docstring), + fnpy_call, self_ref.release ()); return 0; } diff --git a/gdb/value.c b/gdb/value.c index 8e22ac7f8c1..57e62b9175f 100644 --- a/gdb/value.c +++ b/gdb/value.c @@ -2421,31 +2421,19 @@ function_command (const char *command, int from_tty) /* Do nothing. */ } -/* Clean up if an internal function's command is destroyed. */ -static void -function_destroyer (struct cmd_list_element *self, void *ignore) -{ - xfree ((char *) self->name); -} - /* Helper function that does the work for add_internal_function. */ static struct cmd_list_element * do_add_internal_function (const char *name, const char *doc, internal_function_fn handler, void *cookie) { - struct cmd_list_element *cmd; struct internal_function *ifn; struct internalvar *var = lookup_internalvar (name); ifn = create_internal_function (name, handler, cookie); set_internalvar_function (var, ifn); - cmd = add_cmd (xstrdup (name), no_class, function_command, (char *) doc, - &functionlist); - cmd->destroyer = function_destroyer; - - return cmd; + return add_cmd (name, no_class, function_command, doc, &functionlist); } /* See value.h. */ @@ -2460,13 +2448,16 @@ add_internal_function (const char *name, const char *doc, /* See value.h. */ void -add_internal_function (const char *name, gdb::unique_xmalloc_ptr &&doc, +add_internal_function (gdb::unique_xmalloc_ptr &&name, + gdb::unique_xmalloc_ptr &&doc, internal_function_fn handler, void *cookie) { struct cmd_list_element *cmd - = do_add_internal_function (name, doc.get (), handler, cookie); + = do_add_internal_function (name.get (), doc.get (), handler, cookie); doc.release (); cmd->doc_allocated = 1; + name.release (); + cmd->name_allocated = 1; } /* Update VALUE before discarding OBJFILE. COPIED_TYPES is used to diff --git a/gdb/value.h b/gdb/value.h index fdef835f8d7..96c9c216e93 100644 --- a/gdb/value.h +++ b/gdb/value.h @@ -1177,7 +1177,7 @@ extern void add_internal_function (const char *name, const char *doc, /* This overload takes an allocated documentation string. */ -extern void add_internal_function (const char *name, +extern void add_internal_function (gdb::unique_xmalloc_ptr &&name, gdb::unique_xmalloc_ptr &&doc, internal_function_fn handler, void *cookie); -- 2.30.2