ardour/livetrax
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Yet another pane pain: allow deleting children using forall_vfunc

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We not only need to make sure the iterator remains valid, but also
the object pointed to.

Valgrind trace:
Invalid read of size 8
 Gtkmm2ext::Pane::forall_vfunc(int, void (*)(_GtkWidget*, void*), void*) (pane.cc:617)
 Gtk::Container_Class::forall_vfunc_callback(_GtkContainer*, int, void (*)(_GtkWidget*, void*), void*)
 gtk_container_destroy (gtkcontainer.c:1073)
 g_closure_invoke (gclosure.c:804)
...
 g_object_run_dispose (gobject.c:1084)
This commit is contained in:
Robin Gareus 2017-01-20 03:13:41 +01:00
parent 4ee8a0e9fc
commit 6b5dce2c66
2 changed files with 16 additions and 17 deletions
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3
libs/gtkmm2ext/gtkmm2ext/pane.h
View File

@ -22,6 +22,7 @@
#include <vector>
#include <algorithm>
#include <boost/shared_ptr.hpp>
#include <stdint.h>
@ -55,7 +56,7 @@ class LIBGTKMM2EXT_API Pane : public Gtk::Container
Child (Pane* p, Gtk::Widget* widget, uint32_t ms) : pane (p), w (widget), minsize (ms) {}
};
typedef std::vector<Child*> Children;
typedef std::vector<boost::shared_ptr<Child> > Children;
Pane (bool horizontal);
~Pane();

30
libs/gtkmm2ext/pane.cc
View File

@ -51,9 +51,10 @@ Pane::~Pane ()
for (Children::iterator c = children.begin(); c != children.end(); ++c) {
(*c)->show_con.disconnect ();
(*c)->hide_con.disconnect ();
(*c)->w->remove_destroy_notify_callback (*c);
(*c)->w->unparent ();
delete (*c);
if ((*c)->w) {
(*c)->w->remove_destroy_notify_callback ((*c).get());
(*c)->w->unparent ();
}
}
children.clear ();
}
@ -158,8 +159,8 @@ Pane::handle_child_visibility ()
void
Pane::on_add (Widget* w)
{
children.push_back (new Child (this, w, 0));
Child* kid = children.back ();
children.push_back (boost::shared_ptr<Child> (new Child (this, w, 0)));
Child* kid = children.back ().get();
w->set_parent (*this);
/* Gtkmm 2.4 does not correctly arrange for ::on_remove() to be called
@ -190,9 +191,8 @@ Pane::child_destroyed (Gtk::Widget* w)
if ((*c)->w == w) {
(*c)->show_con.disconnect ();
(*c)->hide_con.disconnect ();
Child* kid = *c;
(*c)->w = NULL; // mark invalid
children.erase (c);
delete kid;
break;
}
}
@ -206,11 +206,10 @@ Pane::on_remove (Widget* w)
if ((*c)->w == w) {
(*c)->show_con.disconnect ();
(*c)->hide_con.disconnect ();
w->remove_destroy_notify_callback (*c);
w->remove_destroy_notify_callback ((*c).get());
w->unparent ();
Child* kid = *c;
(*c)->w = NULL; // mark invalid
children.erase (c);
delete kid;
break;
}
}
@ -610,12 +609,11 @@ Pane::forall_vfunc (gboolean include_internals, GtkCallback callback, gpointer c
/* since the callback could modify the child list(s), make sure we keep
* the iterators safe;
*/
for (Children::iterator c = children.begin(); c != children.end(); ) {
Children::iterator next = c;
++next;
callback ((*c)->w->gobj(), callback_data);
c = next;
Children kids (children);
for (Children::const_iterator c = kids.begin(); c != kids.end(); ++c) {
if ((*c)->w) {
callback ((*c)->w->gobj(), callback_data);
}
}
if (include_internals) {