gparted/include/Win_GParted.h

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/* Copyright (C) 2004 Bart
* Copyright (C) 2008, 2009, 2010 Curtis Gedak
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*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef WIN_GPARTED
#define WIN_GPARTED
#include "../include/Device.h"
#include "../include/DrawingAreaVisualDisk.h"
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#include "../include/Partition.h"
#include "../include/TreeView_Detail.h"
#include "../include/GParted_Core.h"
#include "../include/HBoxOperations.h"
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#include <sigc++/class_slot.h>
#include <gtkmm/paned.h>
#include <gtkmm/toolbar.h>
#include <gtkmm/separatortoolitem.h>
#include <gtkmm/menubar.h>
#include <gtkmm/statusbar.h>
#include <gtkmm/combobox.h>
#include <gtkmm/progressbar.h>
#include <gtkmm/window.h>
#include <gtkmm/table.h>
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namespace GParted
{
class Win_GParted : public Gtk::Window
{
public:
Win_GParted( const std::vector<Glib::ustring> & user_devices ) ;
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private:
void init_menubar() ;
void init_toolbar() ;
void init_partition_menu() ;
Gtk::Menu * create_format_menu() ;
void create_format_menu_add_item( FILESYSTEM filesystem, bool activate ) ;
void init_device_info() ;
void init_hpaned_main() ;
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void refresh_combo_devices() ;
void show_pulsebar( const Glib::ustring & status_message ) ;
void hide_pulsebar();
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//Fill txtview_device_info_buffer with some information about the selected device
void Fill_Label_Device_Info( bool clear = false );
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void Add_Operation( Operation * operation, int index = -1 ) ;
bool Merge_Operations( unsigned int first, unsigned int second );
void Refresh_Visual();
bool Quit_Check_Operations();
void set_valid_operations() ;
Only allow Undo and Apply after merging operations (#699452) It was possible to make GParted crash by adding a label, check or new UUID operation and then applying the operation before the view of pending operations had finished fully opening. The operation would be successfully applied but GParted would crash afterwards. The fault was that Add_Operation() still enabled the Undo and Apply buttons and processed the GTK event loop before merging the list of pending operations. Faulty code flow went like this: activate_*() Add_Operation() Add operation to the operations[] vector Enable Undo and Apply buttons Refresh_Visual() Process GTK event loop Process Apply button callback applying operations, refreshing display and clearing operations[] vector Merge operations in the operations[] vector << Core dump here >> Merge_Operations() Refresh_Visual() This faulty code flow came about when merging of operations was added and it didn't appreciate that the operations[] vector could have been processed and cleared by Add_Operations() before the merge step. Relevant commit: b10349ae37df06b7bf7de91ea93a3913535ade3a Merge overlapping operations (#438573) Fragment of code in the label operation case: 2454 void Win_GParted::activate_label_partition() 2455 { ... 2472 Add_Operation( operation ) ; 2473 2474 // Verify if the two operations can be merged 2475 for ( unsigned int t = 0 ; t < operations .size() - 1 ; t++ ) 2476 { 2477 if ( operations[ t ] ->type == OPERATION_LABEL_PARTITION ) 2478 { 2479 if ( Merge_Operations( t, operations .size() - 1 ) ) 2480 break; 2481 } 2482 } Commentary in the crashing label operation case: 2472 The pending operation was already applied when Add_Operation() returned resulting in the operations[] vector being cleared setting its size to 0. 2475 The return type of operations.size() is an unsigned integral, so the upper limit of the for loop is t < 0UL - 1. Assuming a 32-bit machine that's t < 4294967295. 2477 operations[] vector is access from out of bounds offset 0 upwards until unallocated memory is accessed resulting in a core dump. Fix this by not enabling the Undo and Apply buttons and processing the GTK event loop until after merging of operations has been performed. Fixed code flow goes like this: activate_*() Add_Operation() Add operation to the operations[] vector Merge operations in the operations[] vector Merge_Operations() show_operationslist() Enable Undo and Apply buttons Refresh_Visual() Process GTK event loop Process Apply button callback applying operations, refreshing display and clearing operations[] vector Not allowing the operations list to be process until after the merge step is the be correct ordering. This also prevents the new operation from flashing up in the operations list and then immediately disappearing if merged. In the case of adding the first operation, delaying enabling the Undo and Apply buttons is enough as the buttons were previously disabled preventing the operation being applied before the merge. In the case of adding further operations, processing of the GTK event loop must also be delayed until after the merge to prevent the operations being applied before the merge. Although that window of opportunity would only be microseconds. Bug #699452 - Crash when applying operations before pending operations fully displayed
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void show_operationslist() ;
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//convenience functions
void toggle_item( bool state, int menu_item, int toolbar_item = -1 )
{
if ( menu_item >= 0 && menu_item < static_cast<int>( menu_partition .items() .size() ) )
menu_partition .items()[ menu_item ] .set_sensitive( state ) ;
if ( toolbar_item >= 0 && toolbar_item < toolbar_main .get_n_items() )
toolbar_main .get_nth_item( toolbar_item ) ->set_sensitive( state ) ;
}
void allow_new( bool state ) {
toggle_item( state, MENU_NEW, TOOLBAR_NEW ) ; }
void allow_delete( bool state ) {
toggle_item( state, MENU_DEL, TOOLBAR_DEL ) ; }
void allow_resize( bool state ) {
toggle_item( state, MENU_RESIZE_MOVE, TOOLBAR_RESIZE_MOVE ) ; }
void allow_copy( bool state ) {
toggle_item( state, MENU_COPY, TOOLBAR_COPY ) ; }
void allow_paste( bool state ) {
toggle_item( state, MENU_PASTE, TOOLBAR_PASTE ) ; }
void allow_format( bool state ) {
toggle_item( state, MENU_FORMAT ) ; }
void allow_toggle_busy_state( bool state ) {
toggle_item( state, MENU_TOGGLE_BUSY ) ; }
void allow_manage_flags( bool state ) {
toggle_item( state, MENU_FLAGS ) ; }
void allow_check( bool state ) {
toggle_item( state, MENU_CHECK ) ; }
void allow_label_partition( bool state ) {
toggle_item( state, MENU_LABEL_PARTITION ) ; }
void allow_change_uuid( bool state ) {
toggle_item( state, MENU_CHANGE_UUID ) ; }
void allow_info( bool state ) {
toggle_item( state, MENU_INFO ) ; }
void allow_undo_clear_apply( bool state )
{
toggle_item( state, -1, TOOLBAR_UNDO ) ;
static_cast<Gtk::CheckMenuItem *>( & menubar_main .items()[ 1 ] .get_submenu() ->items()[ 0 ] )
->set_sensitive( state ) ;
static_cast<Gtk::CheckMenuItem *>( & menubar_main .items()[ 1 ] .get_submenu() ->items()[ 1 ] )
->set_sensitive( state ) ;
toggle_item( state, -1, TOOLBAR_APPLY ) ;
static_cast<Gtk::CheckMenuItem *>( & menubar_main .items()[ 1 ] .get_submenu() ->items()[ 2 ] )
->set_sensitive( state ) ;
}
//threads..
void unmount_partition( bool * succes, Glib::ustring * error );
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//signal handlers
void open_operationslist() ;
void close_operationslist() ;
void clear_operationslist() ;
void combo_devices_changed();
void radio_devices_changed( unsigned int item ) ;
bool on_delete_event( GdkEventAny* ) ;
void on_show() ;
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void menu_gparted_refresh_devices();
void menu_gparted_features();
void menu_gparted_quit();
void menu_view_harddisk_info();
void menu_view_operations();
void show_disklabel_unrecognized( Glib::ustring device_name );
void show_help_dialog( const Glib::ustring & filename, const Glib::ustring & link_id );
void menu_help_contents();
void menu_help_about();
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void on_partition_selected( const Partition & partition, bool src_is_treeview ) ;
void on_partition_activated() ;
void on_partition_popup_menu( unsigned int button, unsigned int time ) ;
bool max_amount_prim_reached() ;
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void activate_resize();
void activate_copy();
void activate_paste();
void activate_new();
void activate_delete();
void activate_info();
void activate_format( GParted::FILESYSTEM new_fs );
void toggle_busy_state() ;
void activate_mount_partition( unsigned int index ) ;
void activate_disklabel() ;
void activate_attempt_rescue_data();
void activate_manage_flags() ;
void activate_check() ;
void activate_change_uuid() ;
void activate_label_partition() ;
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void activate_undo();
void remove_operation( int index = -1, bool remove_all = false ) ;
int partition_in_operation_queue_count( const Partition & partition ) ;
int active_partitions_on_device_count( const Device & device ) ;
void activate_apply();
bool remove_non_empty_lvm2_pv_dialog( const OperationType optype ) ;
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//private variables
unsigned int current_device ;
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Partition selected_partition, copied_partition;
std::vector<Device> devices;
std::vector<Operation *> operations;
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//gui stuff
Gtk::HPaned hpaned_main;
Gtk::VPaned vpaned_main;
Gtk::VBox vbox_main,vbox_info ;
Gtk::HBox hbox_toolbar, *hbox;
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Gtk::Toolbar toolbar_main;
Gtk::MenuBar menubar_main;
Gtk::ComboBox combo_devices ;
Gtk::Menu menu_partition, *menu ;
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Gtk::ToolButton *toolbutton;
Gtk::Statusbar statusbar;
Gtk::Image *image ;
Gtk::ScrolledWindow *scrollwindow;
Gtk::Label label_device_info1, label_device_info2, *label;
Gtk::Tooltips tooltips ;
Gtk::Table *table ;
Gtk::MenuItem *menu_item;
Gtk::ProgressBar pulsebar ;
Gtk::TreeRow treerow;
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DrawingAreaVisualDisk drawingarea_visualdisk ;
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TreeView_Detail treeview_detail;
HBoxOperations hbox_operations ;
//device combo
Glib::RefPtr<Gtk::ListStore> liststore_devices ;
struct treeview_devices_Columns : public Gtk::TreeModelColumnRecord
{
Gtk::TreeModelColumn< Glib::RefPtr<Gdk::Pixbuf> > icon ;
Gtk::TreeModelColumn<Glib::ustring> device ;
Gtk::TreeModelColumn<Glib::ustring> size ;
treeview_devices_Columns()
{
add( icon ) ;
add( device ) ;
add( size ) ;
}
};
treeview_devices_Columns treeview_devices_columns ;
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//indices for partitionmenu and toolbar
int
MENU_NEW, TOOLBAR_NEW,
MENU_DEL, TOOLBAR_DEL,
MENU_RESIZE_MOVE, TOOLBAR_RESIZE_MOVE,
MENU_COPY, TOOLBAR_COPY,
MENU_PASTE, TOOLBAR_PASTE,
MENU_FORMAT,
MENU_TOGGLE_BUSY,
MENU_MOUNT,
MENU_FLAGS,
MENU_CHECK,
MENU_LABEL_PARTITION,
MENU_CHANGE_UUID,
MENU_INFO,
TOOLBAR_UNDO,
TOOLBAR_APPLY ;
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//usefull variables which are used by many different functions...
int index_extended ; //position of the extended partition (-1 means there isn't one)
unsigned short primary_count ;//primary_count checks for max. of 4 pimary partitions
unsigned short new_count;//new_count keeps track of the new created partitions
FS fs ;
bool OPERATIONSLIST_OPEN ;
Glib::ustring gpart_output;//Output of gpart command
GParted_Core gparted_core ;
std::vector<Gtk::Label *> device_info ;
//stuff for progress overview and pulsebar
bool pulsebar_pulse();
sigc::connection pulsetimer;
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};
} //GParted
#endif //WIN_GPARTED