mirror of
https://github.com/espressif/binutils-gdb.git
synced 2025-08-05 21:50:21 +08:00
Move "catch fork" to a new file
The "catch fork" 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-fork.c.
This commit is contained in:
Tom Tromey
@ -999,6 +999,7 @@ COMMON_SFILES = \
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bfd-target.c \
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block.c \
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blockframe.c \
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break-catch-fork.c \
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break-catch-sig.c \
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break-catch-syscall.c \
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break-catch-throw.c \
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286
gdb/break-catch-fork.c
Normal file
286
gdb/break-catch-fork.c
Normal file
@ -0,0 +1,286 @@
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/* Everything about vfork 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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/* An instance of this type is used to represent a fork or vfork
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catchpoint. A breakpoint is really of this type iff its ops pointer points
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to CATCH_FORK_BREAKPOINT_OPS. */
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struct fork_catchpoint : public breakpoint
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{
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/* True if the breakpoint is for vfork, false for fork. */
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bool is_vfork;
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/* Process id of a child process whose forking triggered this
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catchpoint. This field is only valid immediately after this
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catchpoint has triggered. */
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ptid_t forked_inferior_pid;
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};
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/* Implement the "insert" breakpoint_ops method for fork
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catchpoints. */
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static int
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insert_catch_fork (struct bp_location *bl)
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{
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struct fork_catchpoint *c = (struct fork_catchpoint *) bl->owner;
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if (c->is_vfork)
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return target_insert_vfork_catchpoint (inferior_ptid.pid ());
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else
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return target_insert_fork_catchpoint (inferior_ptid.pid ());
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}
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/* Implement the "remove" breakpoint_ops method for fork
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catchpoints. */
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static int
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remove_catch_fork (struct bp_location *bl, enum remove_bp_reason reason)
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{
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struct fork_catchpoint *c = (struct fork_catchpoint *) bl->owner;
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if (c->is_vfork)
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return target_remove_vfork_catchpoint (inferior_ptid.pid ());
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else
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return target_remove_fork_catchpoint (inferior_ptid.pid ());
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}
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/* Implement the "breakpoint_hit" breakpoint_ops method for fork
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catchpoints. */
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static int
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breakpoint_hit_catch_fork (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 fork_catchpoint *c = (struct fork_catchpoint *) bl->owner;
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if (ws.kind () != (c->is_vfork
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? TARGET_WAITKIND_VFORKED
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: TARGET_WAITKIND_FORKED))
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return 0;
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c->forked_inferior_pid = ws.child_ptid ();
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return 1;
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}
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/* Implement the "print_it" breakpoint_ops method for fork
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catchpoints. */
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static enum print_stop_action
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print_it_catch_fork (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 fork_catchpoint *c = (struct fork_catchpoint *) bs->breakpoint_at;
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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",
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async_reason_lookup (c->is_vfork
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? EXEC_ASYNC_VFORK
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: EXEC_ASYNC_FORK));
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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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if (c->is_vfork)
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uiout->text (" (vforked process ");
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else
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uiout->text (" (forked process ");
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uiout->field_signed ("newpid", c->forked_inferior_pid.pid ());
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uiout->text ("), ");
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return PRINT_SRC_AND_LOC;
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}
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/* Implement the "print_one" breakpoint_ops method for fork
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catchpoints. */
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static void
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print_one_catch_fork (struct breakpoint *b, struct bp_location **last_loc)
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{
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struct fork_catchpoint *c = (struct fork_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 not
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line up too nicely with the headers, but the effect is relatively
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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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const char *name = c->is_vfork ? "vfork" : "fork";
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uiout->text (name);
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if (c->forked_inferior_pid != null_ptid)
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{
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uiout->text (", process ");
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uiout->field_signed ("what", c->forked_inferior_pid.pid ());
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uiout->spaces (1);
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}
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if (uiout->is_mi_like_p ())
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uiout->field_string ("catch-type", name);
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}
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/* Implement the "print_mention" breakpoint_ops method for fork
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catchpoints. */
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static void
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print_mention_catch_fork (struct breakpoint *b)
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{
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struct fork_catchpoint *c = (struct fork_catchpoint *) b;
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printf_filtered (_("Catchpoint %d (%s)"), c->number,
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c->is_vfork ? "vfork" : "fork");
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}
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/* Implement the "print_recreate" breakpoint_ops method for fork
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catchpoints. */
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static void
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print_recreate_catch_fork (struct breakpoint *b, struct ui_file *fp)
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{
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struct fork_catchpoint *c = (struct fork_catchpoint *) b;
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fprintf_unfiltered (fp, "catch %s",
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c->is_vfork ? "vfork" : "fork");
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print_recreate_thread (b, fp);
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}
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/* The breakpoint_ops structure to be used in fork catchpoints. */
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static struct breakpoint_ops catch_fork_breakpoint_ops;
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static void
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create_fork_vfork_event_catchpoint (struct gdbarch *gdbarch,
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bool temp, const char *cond_string,
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bool is_vfork)
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{
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std::unique_ptr<fork_catchpoint> c (new fork_catchpoint ());
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init_catchpoint (c.get (), gdbarch, temp, cond_string,
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&catch_fork_breakpoint_ops);
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c->is_vfork = is_vfork;
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c->forked_inferior_pid = null_ptid;
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install_breakpoint (0, std::move (c), 1);
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}
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typedef enum
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{
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catch_fork_temporary, catch_vfork_temporary,
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catch_fork_permanent, catch_vfork_permanent
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}
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catch_fork_kind;
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static void
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catch_fork_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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catch_fork_kind fork_kind;
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fork_kind = (catch_fork_kind) (uintptr_t) command->context ();
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bool temp = (fork_kind == catch_fork_temporary
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|| fork_kind == catch_vfork_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 [v]fork
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catch [v]fork 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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/* If this target supports it, create a fork or vfork catchpoint
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and enable reporting of such events. */
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switch (fork_kind)
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{
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case catch_fork_temporary:
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case catch_fork_permanent:
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create_fork_vfork_event_catchpoint (gdbarch, temp, cond_string, false);
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break;
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case catch_vfork_temporary:
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case catch_vfork_permanent:
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create_fork_vfork_event_catchpoint (gdbarch, temp, cond_string, true);
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break;
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default:
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error (_("unsupported or unknown fork kind; cannot catch it"));
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break;
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}
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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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/* Fork catchpoints. */
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ops = &catch_fork_breakpoint_ops;
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*ops = base_breakpoint_ops;
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ops->insert_location = insert_catch_fork;
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ops->remove_location = remove_catch_fork;
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ops->breakpoint_hit = breakpoint_hit_catch_fork;
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ops->print_it = print_it_catch_fork;
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ops->print_one = print_one_catch_fork;
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ops->print_mention = print_mention_catch_fork;
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ops->print_recreate = print_recreate_catch_fork;
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}
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void _initialize_break_catch_fork ();
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void
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_initialize_break_catch_fork ()
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{
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initialize_ops ();
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add_catch_command ("fork", _("Catch calls to fork."),
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catch_fork_command_1,
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NULL,
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(void *) (uintptr_t) catch_fork_permanent,
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(void *) (uintptr_t) catch_fork_temporary);
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add_catch_command ("vfork", _("Catch calls to vfork."),
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catch_fork_command_1,
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NULL,
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(void *) (uintptr_t) catch_vfork_permanent,
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(void *) (uintptr_t) catch_vfork_temporary);
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}
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243
gdb/breakpoint.c
243
gdb/breakpoint.c
@ -7722,162 +7722,6 @@ disable_breakpoints_in_freed_objfile (struct objfile *objfile)
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}
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}
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/* FORK & VFORK catchpoints. */
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/* An instance of this type is used to represent a fork or vfork
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catchpoint. A breakpoint is really of this type iff its ops pointer points
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to CATCH_FORK_BREAKPOINT_OPS. */
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struct fork_catchpoint : public breakpoint
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{
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/* True if the breakpoint is for vfork, false for fork. */
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bool is_vfork;
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/* Process id of a child process whose forking triggered this
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catchpoint. This field is only valid immediately after this
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catchpoint has triggered. */
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ptid_t forked_inferior_pid;
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};
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/* Implement the "insert" breakpoint_ops method for fork
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catchpoints. */
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static int
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insert_catch_fork (struct bp_location *bl)
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{
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struct fork_catchpoint *c = (struct fork_catchpoint *) bl->owner;
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if (c->is_vfork)
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return target_insert_vfork_catchpoint (inferior_ptid.pid ());
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else
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return target_insert_fork_catchpoint (inferior_ptid.pid ());
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}
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/* Implement the "remove" breakpoint_ops method for fork
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catchpoints. */
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static int
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remove_catch_fork (struct bp_location *bl, enum remove_bp_reason reason)
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{
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struct fork_catchpoint *c = (struct fork_catchpoint *) bl->owner;
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if (c->is_vfork)
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return target_remove_vfork_catchpoint (inferior_ptid.pid ());
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else
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return target_remove_fork_catchpoint (inferior_ptid.pid ());
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}
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/* Implement the "breakpoint_hit" breakpoint_ops method for fork
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catchpoints. */
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static int
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breakpoint_hit_catch_fork (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 fork_catchpoint *c = (struct fork_catchpoint *) bl->owner;
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if (ws.kind () != (c->is_vfork
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? TARGET_WAITKIND_VFORKED
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: TARGET_WAITKIND_FORKED))
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return 0;
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c->forked_inferior_pid = ws.child_ptid ();
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return 1;
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}
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/* Implement the "print_it" breakpoint_ops method for fork
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catchpoints. */
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static enum print_stop_action
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print_it_catch_fork (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 fork_catchpoint *c = (struct fork_catchpoint *) bs->breakpoint_at;
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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",
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async_reason_lookup (c->is_vfork
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? EXEC_ASYNC_VFORK
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: EXEC_ASYNC_FORK));
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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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if (c->is_vfork)
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uiout->text (" (vforked process ");
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else
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uiout->text (" (forked process ");
|
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uiout->field_signed ("newpid", c->forked_inferior_pid.pid ());
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uiout->text ("), ");
|
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return PRINT_SRC_AND_LOC;
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}
|
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|
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/* Implement the "print_one" breakpoint_ops method for fork
|
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catchpoints. */
|
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|
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static void
|
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print_one_catch_fork (struct breakpoint *b, struct bp_location **last_loc)
|
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{
|
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struct fork_catchpoint *c = (struct fork_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 not
|
||||
line up too nicely with the headers, but the effect is relatively
|
||||
readable). */
|
||||
if (opts.addressprint)
|
||||
uiout->field_skip ("addr");
|
||||
annotate_field (5);
|
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const char *name = c->is_vfork ? "vfork" : "fork";
|
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uiout->text (name);
|
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if (c->forked_inferior_pid != null_ptid)
|
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{
|
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uiout->text (", process ");
|
||||
uiout->field_signed ("what", c->forked_inferior_pid.pid ());
|
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uiout->spaces (1);
|
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}
|
||||
|
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if (uiout->is_mi_like_p ())
|
||||
uiout->field_string ("catch-type", name);
|
||||
}
|
||||
|
||||
/* Implement the "print_mention" breakpoint_ops method for fork
|
||||
catchpoints. */
|
||||
|
||||
static void
|
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print_mention_catch_fork (struct breakpoint *b)
|
||||
{
|
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struct fork_catchpoint *c = (struct fork_catchpoint *) b;
|
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printf_filtered (_("Catchpoint %d (%s)"), c->number,
|
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c->is_vfork ? "vfork" : "fork");
|
||||
}
|
||||
|
||||
/* Implement the "print_recreate" breakpoint_ops method for fork
|
||||
catchpoints. */
|
||||
|
||||
static void
|
||||
print_recreate_catch_fork (struct breakpoint *b, struct ui_file *fp)
|
||||
{
|
||||
struct fork_catchpoint *c = (struct fork_catchpoint *) b;
|
||||
fprintf_unfiltered (fp, "catch %s",
|
||||
c->is_vfork ? "vfork" : "fork");
|
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print_recreate_thread (b, fp);
|
||||
}
|
||||
|
||||
/* The breakpoint_ops structure to be used in fork catchpoints. */
|
||||
|
||||
static struct breakpoint_ops catch_fork_breakpoint_ops;
|
||||
|
||||
/* An instance of this type is used to represent an solib catchpoint.
|
||||
A breakpoint is really of this type iff its ops pointer points to
|
||||
CATCH_SOLIB_BREAKPOINT_OPS. */
|
||||
@ -8142,21 +7986,6 @@ install_breakpoint (int internal, std::unique_ptr<breakpoint> &&arg, int update_
|
||||
update_global_location_list (UGLL_MAY_INSERT);
|
||||
}
|
||||
|
||||
static void
|
||||
create_fork_vfork_event_catchpoint (struct gdbarch *gdbarch,
|
||||
bool temp, const char *cond_string,
|
||||
bool is_vfork)
|
||||
{
|
||||
std::unique_ptr<fork_catchpoint> c (new fork_catchpoint ());
|
||||
|
||||
init_catchpoint (c.get (), gdbarch, temp, cond_string,
|
||||
&catch_fork_breakpoint_ops);
|
||||
c->is_vfork = is_vfork;
|
||||
c->forked_inferior_pid = null_ptid;
|
||||
|
||||
install_breakpoint (0, std::move (c), 1);
|
||||
}
|
||||
|
||||
/* Exec catchpoints. */
|
||||
|
||||
/* An instance of this type is used to represent an exec catchpoint.
|
||||
@ -11163,57 +10992,6 @@ ep_parse_optional_if_clause (const char **arg)
|
||||
/* Commands to deal with catching events, such as signals, exceptions,
|
||||
process start/exit, etc. */
|
||||
|
||||
typedef enum
|
||||
{
|
||||
catch_fork_temporary, catch_vfork_temporary,
|
||||
catch_fork_permanent, catch_vfork_permanent
|
||||
}
|
||||
catch_fork_kind;
|
||||
|
||||
static void
|
||||
catch_fork_command_1 (const char *arg, int from_tty,
|
||||
struct cmd_list_element *command)
|
||||
{
|
||||
struct gdbarch *gdbarch = get_current_arch ();
|
||||
const char *cond_string = NULL;
|
||||
catch_fork_kind fork_kind;
|
||||
|
||||
fork_kind = (catch_fork_kind) (uintptr_t) command->context ();
|
||||
bool temp = (fork_kind == catch_fork_temporary
|
||||
|| fork_kind == catch_vfork_temporary);
|
||||
|
||||
if (!arg)
|
||||
arg = "";
|
||||
arg = skip_spaces (arg);
|
||||
|
||||
/* The allowed syntax is:
|
||||
catch [v]fork
|
||||
catch [v]fork if <cond>
|
||||
|
||||
First, check if there's an if clause. */
|
||||
cond_string = ep_parse_optional_if_clause (&arg);
|
||||
|
||||
if ((*arg != '\0') && !isspace (*arg))
|
||||
error (_("Junk at end of arguments."));
|
||||
|
||||
/* If this target supports it, create a fork or vfork catchpoint
|
||||
and enable reporting of such events. */
|
||||
switch (fork_kind)
|
||||
{
|
||||
case catch_fork_temporary:
|
||||
case catch_fork_permanent:
|
||||
create_fork_vfork_event_catchpoint (gdbarch, temp, cond_string, false);
|
||||
break;
|
||||
case catch_vfork_temporary:
|
||||
case catch_vfork_permanent:
|
||||
create_fork_vfork_event_catchpoint (gdbarch, temp, cond_string, true);
|
||||
break;
|
||||
default:
|
||||
error (_("unsupported or unknown fork kind; cannot catch it"));
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
catch_exec_command_1 (const char *arg, int from_tty,
|
||||
struct cmd_list_element *command)
|
||||
@ -15264,17 +15042,6 @@ initialize_breakpoint_ops (void)
|
||||
ops->create_breakpoints_sal = strace_marker_create_breakpoints_sal;
|
||||
ops->decode_location = strace_marker_decode_location;
|
||||
|
||||
/* Fork catchpoints. */
|
||||
ops = &catch_fork_breakpoint_ops;
|
||||
*ops = base_breakpoint_ops;
|
||||
ops->insert_location = insert_catch_fork;
|
||||
ops->remove_location = remove_catch_fork;
|
||||
ops->breakpoint_hit = breakpoint_hit_catch_fork;
|
||||
ops->print_it = print_it_catch_fork;
|
||||
ops->print_one = print_one_catch_fork;
|
||||
ops->print_mention = print_mention_catch_fork;
|
||||
ops->print_recreate = print_recreate_catch_fork;
|
||||
|
||||
/* Exec catchpoints. */
|
||||
ops = &catch_exec_breakpoint_ops;
|
||||
*ops = base_breakpoint_ops;
|
||||
@ -15590,16 +15357,6 @@ Set temporary catchpoints to catch events."),
|
||||
&tcatch_cmdlist,
|
||||
0/*allow-unknown*/, &cmdlist);
|
||||
|
||||
add_catch_command ("fork", _("Catch calls to fork."),
|
||||
catch_fork_command_1,
|
||||
NULL,
|
||||
(void *) (uintptr_t) catch_fork_permanent,
|
||||
(void *) (uintptr_t) catch_fork_temporary);
|
||||
add_catch_command ("vfork", _("Catch calls to vfork."),
|
||||
catch_fork_command_1,
|
||||
NULL,
|
||||
(void *) (uintptr_t) catch_vfork_permanent,
|
||||
(void *) (uintptr_t) catch_vfork_temporary);
|
||||
add_catch_command ("exec", _("Catch calls to exec."),
|
||||
catch_exec_command_1,
|
||||
NULL,
|
||||
|
||||
Reference in New Issue
Block a user