forked from Imagelibrary/binutils-gdb
Move "catch exec" to a new file
The "catch exec" code is reasonably self-contained, and so this patch moves it out of breakpoint.c (the second largest source file in gdb) and into a new file, break-catch-exec.c.
This commit is contained in:
Tom Tromey
236
gdb/break-catch-exec.c
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236
gdb/break-catch-exec.c
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/* Everything about exec catchpoints, for GDB.
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Copyright (C) 1986-2022 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 "annotate.h"
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#include "arch-utils.h"
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#include "breakpoint.h"
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#include "cli/cli-decode.h"
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#include "inferior.h"
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#include "mi/mi-common.h"
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#include "target.h"
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#include "valprint.h"
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/* Exec catchpoints. */
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/* An instance of this type is used to represent an exec catchpoint.
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A breakpoint is really of this type iff its ops pointer points to
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CATCH_EXEC_BREAKPOINT_OPS. */
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struct exec_catchpoint : public breakpoint
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{
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/* Filename of a program whose exec triggered this catchpoint.
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This field is only valid immediately after this catchpoint has
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triggered. */
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gdb::unique_xmalloc_ptr<char> exec_pathname;
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};
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static int
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insert_catch_exec (struct bp_location *bl)
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{
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return target_insert_exec_catchpoint (inferior_ptid.pid ());
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}
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static int
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remove_catch_exec (struct bp_location *bl, enum remove_bp_reason reason)
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{
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return target_remove_exec_catchpoint (inferior_ptid.pid ());
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}
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static int
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breakpoint_hit_catch_exec (const struct bp_location *bl,
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const address_space *aspace, CORE_ADDR bp_addr,
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const target_waitstatus &ws)
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{
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struct exec_catchpoint *c = (struct exec_catchpoint *) bl->owner;
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if (ws.kind () != TARGET_WAITKIND_EXECD)
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return 0;
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c->exec_pathname = make_unique_xstrdup (ws.execd_pathname ());
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return 1;
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}
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static enum print_stop_action
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print_it_catch_exec (bpstat *bs)
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{
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struct ui_out *uiout = current_uiout;
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struct breakpoint *b = bs->breakpoint_at;
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struct exec_catchpoint *c = (struct exec_catchpoint *) b;
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annotate_catchpoint (b->number);
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maybe_print_thread_hit_breakpoint (uiout);
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if (b->disposition == disp_del)
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uiout->text ("Temporary catchpoint ");
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else
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uiout->text ("Catchpoint ");
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if (uiout->is_mi_like_p ())
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{
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uiout->field_string ("reason", async_reason_lookup (EXEC_ASYNC_EXEC));
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uiout->field_string ("disp", bpdisp_text (b->disposition));
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}
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uiout->field_signed ("bkptno", b->number);
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uiout->text (" (exec'd ");
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uiout->field_string ("new-exec", c->exec_pathname.get ());
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uiout->text ("), ");
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return PRINT_SRC_AND_LOC;
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}
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static void
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print_one_catch_exec (struct breakpoint *b, struct bp_location **last_loc)
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{
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struct exec_catchpoint *c = (struct exec_catchpoint *) b;
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struct value_print_options opts;
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struct ui_out *uiout = current_uiout;
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get_user_print_options (&opts);
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/* Field 4, the address, is omitted (which makes the columns
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not line up too nicely with the headers, but the effect
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is relatively readable). */
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if (opts.addressprint)
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uiout->field_skip ("addr");
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annotate_field (5);
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uiout->text ("exec");
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if (c->exec_pathname != NULL)
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{
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uiout->text (", program \"");
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uiout->field_string ("what", c->exec_pathname.get ());
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uiout->text ("\" ");
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}
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if (uiout->is_mi_like_p ())
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uiout->field_string ("catch-type", "exec");
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}
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static void
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print_mention_catch_exec (struct breakpoint *b)
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{
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printf_filtered (_("Catchpoint %d (exec)"), b->number);
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}
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/* Implement the "print_recreate" breakpoint_ops method for exec
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catchpoints. */
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static void
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print_recreate_catch_exec (struct breakpoint *b, struct ui_file *fp)
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{
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fprintf_unfiltered (fp, "catch exec");
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print_recreate_thread (b, fp);
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}
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static struct breakpoint_ops catch_exec_breakpoint_ops;
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/* This function attempts to parse an optional "if <cond>" clause
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from the arg string. If one is not found, it returns NULL.
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Else, it returns a pointer to the condition string. (It does not
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attempt to evaluate the string against a particular block.) And,
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it updates arg to point to the first character following the parsed
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if clause in the arg string. */
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const char *
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ep_parse_optional_if_clause (const char **arg)
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{
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const char *cond_string;
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if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2]))
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return NULL;
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/* Skip the "if" keyword. */
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(*arg) += 2;
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/* Skip any extra leading whitespace, and record the start of the
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condition string. */
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*arg = skip_spaces (*arg);
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cond_string = *arg;
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/* Assume that the condition occupies the remainder of the arg
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string. */
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(*arg) += strlen (cond_string);
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return cond_string;
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}
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/* Commands to deal with catching events, such as signals, exceptions,
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process start/exit, etc. */
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static void
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catch_exec_command_1 (const char *arg, int from_tty,
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struct cmd_list_element *command)
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{
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struct gdbarch *gdbarch = get_current_arch ();
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const char *cond_string = NULL;
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bool temp = command->context () == CATCH_TEMPORARY;
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if (!arg)
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arg = "";
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arg = skip_spaces (arg);
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/* The allowed syntax is:
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catch exec
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catch exec if <cond>
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First, check if there's an if clause. */
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cond_string = ep_parse_optional_if_clause (&arg);
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if ((*arg != '\0') && !isspace (*arg))
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error (_("Junk at end of arguments."));
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std::unique_ptr<exec_catchpoint> c (new exec_catchpoint ());
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init_catchpoint (c.get (), gdbarch, temp, cond_string,
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&catch_exec_breakpoint_ops);
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c->exec_pathname.reset ();
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install_breakpoint (0, std::move (c), 1);
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}
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static void
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initialize_ops ()
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{
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struct breakpoint_ops *ops;
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initialize_breakpoint_ops ();
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/* Exec catchpoints. */
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ops = &catch_exec_breakpoint_ops;
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*ops = base_breakpoint_ops;
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ops->insert_location = insert_catch_exec;
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ops->remove_location = remove_catch_exec;
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ops->breakpoint_hit = breakpoint_hit_catch_exec;
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ops->print_it = print_it_catch_exec;
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ops->print_one = print_one_catch_exec;
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ops->print_mention = print_mention_catch_exec;
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ops->print_recreate = print_recreate_catch_exec;
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}
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void _initialize_break_catch_exec ();
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void
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_initialize_break_catch_exec ()
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{
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initialize_ops ();
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add_catch_command ("exec", _("Catch calls to exec."),
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catch_exec_command_1,
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NULL,
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CATCH_PERMANENT,
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CATCH_TEMPORARY);
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}
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