# xcalloc

- **Language:** C
- **Kind:** function
- **Source:** https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/xmalloc.c#L41
- **Page:** https://libtmux.org/en/tmux/3.2a/reference/c-function-xcalloc/

```c
void * xcalloc(size_t nmemb, size_t size)
```

## Parameters

- `nmemb` (`size_t`)
- `size` (`size_t`)

## Called by

- [`args_parse`](/en/tmux/3.2a/reference/c-function-args_parse/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/arguments.c#L73)
- [`args_print`](/en/tmux/3.2a/reference/c-function-args_print/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/arguments.c#L184)
- [`args_set`](/en/tmux/3.2a/reference/c-function-args_set/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/arguments.c#L278)
- [`cmd_command_prompt_exec`](/en/tmux/3.2a/reference/c-function-cmd-command-prompt-c-cmd_command_prompt_exec/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/cmd-command-prompt.c#L78)
- [`cmd_copy_argv`](/en/tmux/3.2a/reference/c-function-cmd_copy_argv/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/cmd.c#L334)
- [`cmd_if_shell_exec`](/en/tmux/3.2a/reference/c-function-cmd-if-shell-c-cmd_if_shell_exec/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/cmd-if-shell.c#L102)
- [`cmd_list_new`](/en/tmux/3.2a/reference/c-function-cmd_list_new/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/cmd.c#L580)
- [`cmd_list_print`](/en/tmux/3.2a/reference/c-function-cmd_list_print/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/cmd.c#L630)
- [`cmd_load_buffer_exec`](/en/tmux/3.2a/reference/c-function-cmd-load-buffer-c-cmd_load_buffer_exec/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/cmd-load-buffer.c#L99)
- [`cmd_parse`](/en/tmux/3.2a/reference/c-function-cmd_parse/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/cmd.c#L524)
- [`cmd_run_shell_exec`](/en/tmux/3.2a/reference/c-function-cmd-run-shell-c-cmd_run_shell_exec/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/cmd-run-shell.c#L118)
- [`cmd_source_file_exec`](/en/tmux/3.2a/reference/c-function-cmd-source-file-c-cmd_source_file_exec/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/cmd-source-file.c#L137)
- [`cmd_unpack_argv`](/en/tmux/3.2a/reference/c-function-cmd_unpack_argv/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/cmd.c#L305)
- [`cmd_wait_for_lock`](/en/tmux/3.2a/reference/c-function-cmd-wait-for-c-cmd_wait_for_lock/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/cmd-wait-for.c#L210)
- [`cmd_wait_for_wait`](/en/tmux/3.2a/reference/c-function-cmd-wait-for-c-cmd_wait_for_wait/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/cmd-wait-for.c#L188)
- [`cmdq_get_callback1`](/en/tmux/3.2a/reference/c-function-cmdq_get_callback1/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/cmd-queue.c#L644)
- [`cmdq_get_command`](/en/tmux/3.2a/reference/c-function-cmdq_get_command/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/cmd-queue.c#L490)
- [`cmdq_new`](/en/tmux/3.2a/reference/c-function-cmdq_new/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/cmd-queue.c#L127)
- [`cmdq_new_state`](/en/tmux/3.2a/reference/c-function-cmdq_new_state/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/cmd-queue.c#L211)
- [`control_add_pane`](/en/tmux/3.2a/reference/c-function-control-c-control_add_pane/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/control.c#L254)
- [`control_add_sub`](/en/tmux/3.2a/reference/c-function-control_add_sub/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/control.c#L1079)
- [`control_check_subs_all_panes`](/en/tmux/3.2a/reference/c-function-control-c-control_check_subs_all_panes/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/control.c#L926)
- [`control_check_subs_all_windows`](/en/tmux/3.2a/reference/c-function-control-c-control_check_subs_all_windows/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/control.c#L1015)
- [`control_check_subs_pane`](/en/tmux/3.2a/reference/c-function-control-c-control_check_subs_pane/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/control.c#L884)
- [`control_check_subs_window`](/en/tmux/3.2a/reference/c-function-control-c-control_check_subs_window/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/control.c#L974)
- [`control_start`](/en/tmux/3.2a/reference/c-function-control_start/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/control.c#L770)
- [`control_write`](/en/tmux/3.2a/reference/c-function-control_write/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/control.c#L420)
- [`control_write_output`](/en/tmux/3.2a/reference/c-function-control_write_output/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/control.c#L495)
- [`environ_create`](/en/tmux/3.2a/reference/c-function-environ_create/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/environ.c#L48)
- [`environ_push`](/en/tmux/3.2a/reference/c-function-environ_push/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/environ.c#L213)
- [`file_create_with_client`](/en/tmux/3.2a/reference/c-function-file_create_with_client/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/file.c#L105)
- [`file_create_with_peer`](/en/tmux/3.2a/reference/c-function-file_create_with_peer/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/file.c#L76)
- [`format_build_modifiers`](/en/tmux/3.2a/reference/c-function-format-c-format_build_modifiers/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/format.c#L3583)
- [`format_create`](/en/tmux/3.2a/reference/c-function-format_create/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/format.c#L3046)
- [`format_draw`](/en/tmux/3.2a/reference/c-function-format_draw/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/format-draw.c#L902)
- [`format_job_get`](/en/tmux/3.2a/reference/c-function-format-c-format_job_get/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/format.c#L370)
- [`format_loop_panes`](/en/tmux/3.2a/reference/c-function-format-c-format_loop_panes/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/format.c#L3842)
- [`format_loop_sessions`](/en/tmux/3.2a/reference/c-function-format-c-format_loop_sessions/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/format.c#L3719)
- [`format_loop_windows`](/en/tmux/3.2a/reference/c-function-format-c-format_loop_windows/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/format.c#L3789)
- [`format_trim_left`](/en/tmux/3.2a/reference/c-function-format_trim_left/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/format-draw.c#L1066)
- [`format_trim_right`](/en/tmux/3.2a/reference/c-function-format_trim_right/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/format-draw.c#L1149)
- [`grid_create`](/en/tmux/3.2a/reference/c-function-grid_create/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/grid.c#L290)
- [`input_init`](/en/tmux/3.2a/reference/c-function-input_init/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/input.c#L804)
- [`input_key_build`](/en/tmux/3.2a/reference/c-function-input_key_build/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/input-keys.c#L377)
- [`key_bindings_add`](/en/tmux/3.2a/reference/c-function-key_bindings_add/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/key-bindings.c#L209)
- [`key_bindings_init_done`](/en/tmux/3.2a/reference/c-function-key-bindings-c-key_bindings_init_done/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/key-bindings.c#L324)
- [`menu_create`](/en/tmux/3.2a/reference/c-function-menu_create/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/menu.c#L112)
- [`menu_display`](/en/tmux/3.2a/reference/c-function-menu_display/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/menu.c#L361)
- [`mode_tree_add`](/en/tmux/3.2a/reference/c-function-mode_tree_add/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/mode-tree.c#L562)
- [`mode_tree_draw`](/en/tmux/3.2a/reference/c-function-mode_tree_draw/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/mode-tree.c#L683)
- [`mode_tree_start`](/en/tmux/3.2a/reference/c-function-mode_tree_start/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/mode-tree.c#L400)
- [`notify_add`](/en/tmux/3.2a/reference/c-function-notify-c-notify_add/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/notify.c#L168)
- [`options_add`](/en/tmux/3.2a/reference/c-function-options-c-options_add/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/options.c#L328)
- [`options_array_new`](/en/tmux/3.2a/reference/c-function-options-c-options_array_new/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/options.c#L382)
- [`options_create`](/en/tmux/3.2a/reference/c-function-options_create/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/options.c#L175)
- [`popup_display`](/en/tmux/3.2a/reference/c-function-popup_display/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/popup.c#L332)
- [`popup_editor`](/en/tmux/3.2a/reference/c-function-popup_editor/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/popup.c#L428)
- [`proc_add_peer`](/en/tmux/3.2a/reference/c-function-proc_add_peer/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/proc.c#L312)
- [`proc_start`](/en/tmux/3.2a/reference/c-function-proc_start/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/proc.c#L208)
- [`screen_set_selection`](/en/tmux/3.2a/reference/c-function-screen_set_selection/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/screen.c#L373)
- [`screen_write_get_citem`](/en/tmux/3.2a/reference/c-function-screen-write-c-screen_write_get_citem/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/screen-write.c#L69)
- [`server_add_message`](/en/tmux/3.2a/reference/c-function-server_add_message/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/server.c#L526)
- [`server_client_create`](/en/tmux/3.2a/reference/c-function-server_client_create/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/server-client.c#L207)
- [`server_client_dispatch_command`](/en/tmux/3.2a/reference/c-function-server-client-c-server_client_dispatch_command/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/server-client.c#L2157)
- [`server_client_set_pane`](/en/tmux/3.2a/reference/c-function-server_client_set_pane/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/server-client.c#L2500)
- [`session_create`](/en/tmux/3.2a/reference/c-function-session_create/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/session.c#L119)
- [`session_group_new`](/en/tmux/3.2a/reference/c-function-session_group_new/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/session.c#L538)
- [`status_prompt_key`](/en/tmux/3.2a/reference/c-function-status_prompt_key/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/status.c#L1164)
- [`tty_keys_add1`](/en/tmux/3.2a/reference/c-function-tty-keys-c-tty_keys_add1/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/tty-keys.c#L445)
- [`tty_term_create`](/en/tmux/3.2a/reference/c-function-tty_term_create/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/tty-term.c#L532)
- [`utf8_put_item`](/en/tmux/3.2a/reference/c-function-utf8-c-utf8_put_item/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/utf8.c#L112)
- [`window_buffer_add_item`](/en/tmux/3.2a/reference/c-function-window-buffer-c-window_buffer_add_item/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window-buffer.c#L126)
- [`window_buffer_init`](/en/tmux/3.2a/reference/c-function-window-buffer-c-window_buffer_init/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window-buffer.c#L334)
- [`window_buffer_start_edit`](/en/tmux/3.2a/reference/c-function-window-buffer-c-window_buffer_start_edit/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window-buffer.c#L491)
- [`window_client_add_item`](/en/tmux/3.2a/reference/c-function-window-client-c-window_client_add_item/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window-client.c#L115)
- [`window_client_init`](/en/tmux/3.2a/reference/c-function-window-client-c-window_client_init/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window-client.c#L295)
- [`window_copy_clone_screen`](/en/tmux/3.2a/reference/c-function-window-copy-c-window_copy_clone_screen/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window-copy.c#L335)
- [`window_copy_common_init`](/en/tmux/3.2a/reference/c-function-window-copy-c-window_copy_common_init/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window-copy.c#L393)
- [`window_copy_search_marks`](/en/tmux/3.2a/reference/c-function-window-copy-c-window_copy_search_marks/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window-copy.c#L3322)
- [`window_create`](/en/tmux/3.2a/reference/c-function-window_create/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window.c#L307)
- [`window_customize_add_item`](/en/tmux/3.2a/reference/c-function-window-customize-c-window_customize_add_item/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window-customize.c#L217)
- [`window_customize_init`](/en/tmux/3.2a/reference/c-function-window-customize-c-window_customize_init/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window-customize.c#L880)
- [`window_customize_set_key`](/en/tmux/3.2a/reference/c-function-window-customize-c-window_customize_set_key/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window-customize.c#L1257)
- [`window_customize_set_option`](/en/tmux/3.2a/reference/c-function-window-customize-c-window_customize_set_option/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window-customize.c#L1115)
- [`window_pane_create`](/en/tmux/3.2a/reference/c-function-window-c-window_pane_create/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window.c#L855)
- [`window_pane_set_mode`](/en/tmux/3.2a/reference/c-function-window_pane_set_mode/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window.c#L1085)
- [`window_pane_set_palette`](/en/tmux/3.2a/reference/c-function-window_pane_set_palette/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window.c#L1020)
- [`window_tree_add_item`](/en/tmux/3.2a/reference/c-function-window-tree-c-window_tree_add_item/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window-tree.c#L194)
- [`window_tree_init`](/en/tmux/3.2a/reference/c-function-window-tree-c-window_tree_init/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window-tree.c#L908)
- [`winlink_add`](/en/tmux/3.2a/reference/c-function-winlink_add/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/window.c#L173)

## Calls

- [`fatalx`](/en/tmux/3.2a/reference/c-function-fatalx/) (function) [Call site](https://github.com/tmux/tmux/blob/3b929f332aafa7f1080eacc31feb11ffbb1d1841/xmalloc.c#L46)

## Referenced by

- [`screen_write_make_list`](/en/tmux/3.2a/reference/c-function-screen_write_make_list/) (function)