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[binutils-gdb.git] / gdb / break-catch-exec.c
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1 /* Everything about exec catchpoints, for GDB.
3 Copyright (C) 1986-2024 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "annotate.h"
22 #include "arch-utils.h"
23 #include "breakpoint.h"
24 #include "cli/cli-decode.h"
25 #include "inferior.h"
26 #include "mi/mi-common.h"
27 #include "target.h"
28 #include "valprint.h"
30 /* Exec catchpoints. */
32 /* An instance of this type is used to represent an exec catchpoint.
33 A breakpoint is really of this type iff its ops pointer points to
34 CATCH_EXEC_BREAKPOINT_OPS. */
36 struct exec_catchpoint : public catchpoint
38 exec_catchpoint (struct gdbarch *gdbarch, bool temp, const char *cond_string)
39 : catchpoint (gdbarch, temp, cond_string)
43 int insert_location (struct bp_location *) override;
44 int remove_location (struct bp_location *,
45 enum remove_bp_reason reason) override;
46 int breakpoint_hit (const struct bp_location *bl,
47 const address_space *aspace,
48 CORE_ADDR bp_addr,
49 const target_waitstatus &ws) override;
50 enum print_stop_action print_it (const bpstat *bs) const override;
51 bool print_one (const bp_location **) const override;
52 void print_mention () const override;
53 void print_recreate (struct ui_file *fp) const override;
55 /* Filename of a program whose exec triggered this catchpoint.
56 This field is only valid immediately after this catchpoint has
57 triggered. */
58 gdb::unique_xmalloc_ptr<char> exec_pathname;
61 int
62 exec_catchpoint::insert_location (struct bp_location *bl)
64 return target_insert_exec_catchpoint (inferior_ptid.pid ());
67 int
68 exec_catchpoint::remove_location (struct bp_location *bl,
69 enum remove_bp_reason reason)
71 return target_remove_exec_catchpoint (inferior_ptid.pid ());
74 int
75 exec_catchpoint::breakpoint_hit (const struct bp_location *bl,
76 const address_space *aspace,
77 CORE_ADDR bp_addr,
78 const target_waitstatus &ws)
80 if (ws.kind () != TARGET_WAITKIND_EXECD)
81 return 0;
83 exec_pathname = make_unique_xstrdup (ws.execd_pathname ());
84 return 1;
87 enum print_stop_action
88 exec_catchpoint::print_it (const bpstat *bs) const
90 struct ui_out *uiout = current_uiout;
92 annotate_catchpoint (number);
93 maybe_print_thread_hit_breakpoint (uiout);
94 if (disposition == disp_del)
95 uiout->text ("Temporary catchpoint ");
96 else
97 uiout->text ("Catchpoint ");
98 if (uiout->is_mi_like_p ())
100 uiout->field_string ("reason", async_reason_lookup (EXEC_ASYNC_EXEC));
101 uiout->field_string ("disp", bpdisp_text (disposition));
103 uiout->field_signed ("bkptno", number);
104 uiout->text (" (exec'd ");
105 uiout->field_string ("new-exec", exec_pathname.get ());
106 uiout->text ("), ");
108 return PRINT_SRC_AND_LOC;
111 bool
112 exec_catchpoint::print_one (const bp_location **last_loc) const
114 struct value_print_options opts;
115 struct ui_out *uiout = current_uiout;
117 get_user_print_options (&opts);
119 /* Field 4, the address, is omitted (which makes the columns
120 not line up too nicely with the headers, but the effect
121 is relatively readable). */
122 if (opts.addressprint)
123 uiout->field_skip ("addr");
124 annotate_field (5);
125 uiout->text ("exec");
126 if (exec_pathname != NULL)
128 uiout->text (", program \"");
129 uiout->field_string ("what", exec_pathname.get ());
130 uiout->text ("\" ");
133 if (uiout->is_mi_like_p ())
134 uiout->field_string ("catch-type", "exec");
136 return true;
139 void
140 exec_catchpoint::print_mention () const
142 gdb_printf (_("Catchpoint %d (exec)"), number);
145 /* Implement the "print_recreate" method for exec catchpoints. */
147 void
148 exec_catchpoint::print_recreate (struct ui_file *fp) const
150 gdb_printf (fp, "catch exec");
151 print_recreate_thread (fp);
154 /* This function attempts to parse an optional "if <cond>" clause
155 from the arg string. If one is not found, it returns NULL.
157 Else, it returns a pointer to the condition string. (It does not
158 attempt to evaluate the string against a particular block.) And,
159 it updates arg to point to the first character following the parsed
160 if clause in the arg string. */
162 const char *
163 ep_parse_optional_if_clause (const char **arg)
165 const char *cond_string;
167 if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2]))
168 return NULL;
170 /* Skip the "if" keyword. */
171 (*arg) += 2;
173 /* Skip any extra leading whitespace, and record the start of the
174 condition string. */
175 *arg = skip_spaces (*arg);
176 cond_string = *arg;
178 /* Assume that the condition occupies the remainder of the arg
179 string. */
180 (*arg) += strlen (cond_string);
182 return cond_string;
185 /* Commands to deal with catching events, such as signals, exceptions,
186 process start/exit, etc. */
188 static void
189 catch_exec_command_1 (const char *arg, int from_tty,
190 struct cmd_list_element *command)
192 struct gdbarch *gdbarch = get_current_arch ();
193 const char *cond_string = NULL;
194 bool temp = command->context () == CATCH_TEMPORARY;
196 if (!arg)
197 arg = "";
198 arg = skip_spaces (arg);
200 /* The allowed syntax is:
201 catch exec
202 catch exec if <cond>
204 First, check if there's an if clause. */
205 cond_string = ep_parse_optional_if_clause (&arg);
207 if ((*arg != '\0') && !isspace (*arg))
208 error (_("Junk at end of arguments."));
210 std::unique_ptr<exec_catchpoint> c
211 (new exec_catchpoint (gdbarch, temp, cond_string));
213 install_breakpoint (0, std::move (c), 1);
216 void _initialize_break_catch_exec ();
217 void
218 _initialize_break_catch_exec ()
220 add_catch_command ("exec", _("Catch calls to exec."),
221 catch_exec_command_1,
222 NULL,
223 CATCH_PERMANENT,
224 CATCH_TEMPORARY);