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5799c0b969
* charset.c (intermediate_encoding): Remove unused i. * completer.c (signal_completer): Remove unused i. * continuations.c (discard_my_continuations_1): Remove unused continuation_ptr. * corelow.c (core_close): Remove unuseD name. (get_core_siginfo): Remove unused pid. * cp-namespace.c (cp_lookup_symbol_imports_or_template): Remove unused i, cps. * dwarf2loc.c (dwarf2_compile_expr_to_ax): Remove unused base_offset. (loclist_describe_location): Remove unused first. * event-top.c (command_line_handler): Remove unused got_eof. * exec.c (exec_close_1): Remove unused need_symtab_cleanup. (resize_section_table): Remove unused old_value. * gdb_bfd.c (gdb_bfd_map_section): Remove unused header. * gnu-v3-abi.c (compute_vtable_size): Remove unused addr. * i386-tdep.c (i386_process_record): Remove unused rex. * infcmd.c (get_return_value): Remove unused uiout. * jv-lang.c (type_from_class): Remove unused is_array. * jv-valprint.c (java_val_print): Remove unused i. * linux-nat.c (linux_nat_stop_lwp): Remove unused ptid. * linux-thread-db.c (thread_db_find_new_threads_2): Remove unuseD pid. * m2-typeprint.c (m2_print_type): Remove unused code. * macroexp.c (get_character_constant): Remove unused body_start. (macro_stringify): Remove unused result. * objc-lang.c (find_methods): Remove unused gdbarch. * objfiles.c (filter_overlapping_sections): Remove unused abfd1, abfd2. * regcache.c (regcache_cooked_read): Remove unused gdbarch. * stack.c (print_frame_args): Remove unused summary. * thread.c (thread_apply_command): Remove unused p. * valarith.c (value_x_unop): Remove unused mangle_ptr. * valops.c (search_struct_method): Remove unused skip. * valprint.c (generic_val_print): Remove unused byte_order. * varobj.c (varobj_update): Remove unused changed. * cli/cli-cmds.c (complete_command): Remove unused next_item. (alias_command): Remove unused c. * mi/mi-cmd-catch.c (mi_catch_load_unload): Remove unused c. * mi/mi-main.c (mi_cmd_data_write_register_values): Remove unused format. (mi_cmd_data_write_memory): Remove unused word_format. (mi_cmd_data_write_memory_bytes): Remove unused r. * python/py-gdb-readline.c (gdbpy_readline_wrapper): Remove unused p_start, p_end. * python/python.c (_initialize_python): Remove unused cmd_name, cmd. * tui/tui-disasm.c (tui_set_disassem_content): Remove unused line_width. Reference: http://sourceware.org/ml/gdb-patches/2013-01/msg00766.html
325 lines
8.5 KiB
C
325 lines
8.5 KiB
C
/* Continuations for GDB, the GNU debugger.
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Copyright (C) 1986-2013 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "gdbthread.h"
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#include "inferior.h"
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#include "continuations.h"
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struct continuation
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{
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struct continuation *next;
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continuation_ftype *function;
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continuation_free_arg_ftype *free_arg;
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void *arg;
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};
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/* Add a new continuation to the continuation chain. Args are
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FUNCTION to run the continuation up with, and ARG to pass to
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it. */
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static void
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make_continuation (struct continuation **pmy_chain,
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continuation_ftype *function,
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void *arg, void (*free_arg) (void *))
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{
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struct continuation *new = XNEW (struct continuation);
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new->next = *pmy_chain;
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new->function = function;
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new->free_arg = free_arg;
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new->arg = arg;
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*pmy_chain = new;
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}
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static void
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do_my_continuations_1 (struct continuation **pmy_chain, int err)
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{
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struct continuation *ptr;
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while ((ptr = *pmy_chain) != NULL)
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{
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*pmy_chain = ptr->next; /* Do this first in case of recursion. */
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(*ptr->function) (ptr->arg, err);
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if (ptr->free_arg)
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(*ptr->free_arg) (ptr->arg);
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xfree (ptr);
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}
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}
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static void
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do_my_continuations (struct continuation **list, int err)
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{
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struct continuation *continuations;
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if (*list == NULL)
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return;
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/* Copy the list header into another pointer, and set the global
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list header to null, so that the global list can change as a side
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effect of invoking the continuations and the processing of the
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preexisting continuations will not be affected. */
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continuations = *list;
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*list = NULL;
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/* Work now on the list we have set aside. */
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do_my_continuations_1 (&continuations, err);
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}
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static void
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discard_my_continuations_1 (struct continuation **pmy_chain)
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{
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struct continuation *ptr;
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while ((ptr = *pmy_chain) != NULL)
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{
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*pmy_chain = ptr->next;
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if (ptr->free_arg)
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(*ptr->free_arg) (ptr->arg);
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xfree (ptr);
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}
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}
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static void
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discard_my_continuations (struct continuation **list)
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{
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discard_my_continuations_1 (list);
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*list = NULL;
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}
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/* Add a continuation to the continuation list of INFERIOR. The new
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continuation will be added at the front. */
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void
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add_inferior_continuation (continuation_ftype *hook, void *args,
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continuation_free_arg_ftype *free_arg)
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{
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struct inferior *inf = current_inferior ();
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make_continuation (&inf->continuations, hook, args, free_arg);
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}
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/* Do all continuations of the current inferior. */
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void
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do_all_inferior_continuations (int err)
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{
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struct inferior *inf = current_inferior ();
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do_my_continuations (&inf->continuations, err);
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}
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/* Get rid of all the inferior-wide continuations of INF. */
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void
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discard_all_inferior_continuations (struct inferior *inf)
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{
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discard_my_continuations (&inf->continuations);
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}
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/* Add a continuation to the continuation list of THREAD. The new
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continuation will be added at the front. */
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void
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add_continuation (struct thread_info *thread,
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continuation_ftype *hook, void *args,
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continuation_free_arg_ftype *free_arg)
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{
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make_continuation (&thread->continuations, hook, args, free_arg);
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}
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static void
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restore_thread_cleanup (void *arg)
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{
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ptid_t *ptid_p = arg;
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switch_to_thread (*ptid_p);
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}
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/* Walk down the continuation list of PTID, and execute all the
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continuations. There is a problem though. In some cases new
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continuations may be added while we are in the middle of this loop.
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If this happens they will be added in the front, and done before we
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have a chance of exhausting those that were already there. We need
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to then save the beginning of the list in a pointer and do the
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continuations from there on, instead of using the global beginning
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of list as our iteration pointer. */
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static void
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do_all_continuations_ptid (ptid_t ptid,
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struct continuation **continuations_p,
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int err)
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{
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struct cleanup *old_chain;
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ptid_t current_thread;
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if (*continuations_p == NULL)
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return;
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current_thread = inferior_ptid;
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/* Restore selected thread on exit. Don't try to restore the frame
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as well, because:
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- When running continuations, the selected frame is always #0.
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- The continuations may trigger symbol file loads, which may
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change the frame layout (frame ids change), which would trigger
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a warning if we used make_cleanup_restore_current_thread. */
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old_chain = make_cleanup (restore_thread_cleanup, ¤t_thread);
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/* Let the continuation see this thread as selected. */
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switch_to_thread (ptid);
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do_my_continuations (continuations_p, err);
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do_cleanups (old_chain);
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}
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/* Callback for iterate over threads. */
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static int
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do_all_continuations_thread_callback (struct thread_info *thread, void *data)
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{
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int err = * (int *) data;
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do_all_continuations_ptid (thread->ptid, &thread->continuations, err);
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return 0;
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}
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/* Do all continuations of thread THREAD. */
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void
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do_all_continuations_thread (struct thread_info *thread, int err)
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{
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do_all_continuations_thread_callback (thread, &err);
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}
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/* Do all continuations of all threads. */
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void
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do_all_continuations (int err)
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{
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iterate_over_threads (do_all_continuations_thread_callback, &err);
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}
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/* Callback for iterate over threads. */
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static int
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discard_all_continuations_thread_callback (struct thread_info *thread,
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void *data)
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{
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discard_my_continuations (&thread->continuations);
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return 0;
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}
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/* Get rid of all the continuations of THREAD. */
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void
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discard_all_continuations_thread (struct thread_info *thread)
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{
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discard_all_continuations_thread_callback (thread, NULL);
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}
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/* Get rid of all the continuations of all threads. */
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void
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discard_all_continuations (void)
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{
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iterate_over_threads (discard_all_continuations_thread_callback, NULL);
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}
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/* Add a continuation to the intermediate continuation list of THREAD.
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The new continuation will be added at the front. */
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void
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add_intermediate_continuation (struct thread_info *thread,
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continuation_ftype *hook,
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void *args,
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continuation_free_arg_ftype *free_arg)
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{
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make_continuation (&thread->intermediate_continuations, hook,
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args, free_arg);
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}
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/* Walk down the cmd_continuation list, and execute all the
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continuations. There is a problem though. In some cases new
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continuations may be added while we are in the middle of this
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loop. If this happens they will be added in the front, and done
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before we have a chance of exhausting those that were already
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there. We need to then save the beginning of the list in a pointer
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and do the continuations from there on, instead of using the
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global beginning of list as our iteration pointer. */
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static int
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do_all_intermediate_continuations_thread_callback (struct thread_info *thread,
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void *data)
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{
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int err = * (int *) data;
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do_all_continuations_ptid (thread->ptid,
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&thread->intermediate_continuations, err);
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return 0;
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}
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/* Do all intermediate continuations of thread THREAD. */
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void
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do_all_intermediate_continuations_thread (struct thread_info *thread, int err)
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{
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do_all_intermediate_continuations_thread_callback (thread, &err);
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}
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/* Do all intermediate continuations of all threads. */
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void
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do_all_intermediate_continuations (int err)
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{
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iterate_over_threads (do_all_intermediate_continuations_thread_callback,
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&err);
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}
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/* Callback for iterate over threads. */
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static int
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discard_all_intermediate_continuations_thread_callback (struct thread_info *thread,
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void *data)
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{
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discard_my_continuations (&thread->intermediate_continuations);
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return 0;
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}
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/* Get rid of all the intermediate continuations of THREAD. */
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void
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discard_all_intermediate_continuations_thread (struct thread_info *thread)
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{
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discard_all_intermediate_continuations_thread_callback (thread, NULL);
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}
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/* Get rid of all the intermediate continuations of all threads. */
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void
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discard_all_intermediate_continuations (void)
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{
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iterate_over_threads (discard_all_intermediate_continuations_thread_callback,
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NULL);
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}
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