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46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
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/* Native-dependent code for FreeBSD x86.
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Copyright (C) 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 "x86-fbsd-nat.h"
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/* Implement the virtual fbsd_nat_target::low_new_fork method. */
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void
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x86_fbsd_nat_target::low_new_fork (ptid_t parent, pid_t child)
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{
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struct x86_debug_reg_state *parent_state, *child_state;
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/* If there is no parent state, no watchpoints nor breakpoints have
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been set, so there is nothing to do. */
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parent_state = x86_lookup_debug_reg_state (parent.pid ());
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if (parent_state == nullptr)
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return;
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/* The kernel clears debug registers in the new child process after
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fork, but GDB core assumes the child inherits the watchpoints/hw
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breakpoints of the parent, and will remove them all from the
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forked off process. Copy the debug registers mirrors into the
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new process so that all breakpoints and watchpoints can be
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removed together. */
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child_state = x86_debug_reg_state (child);
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*child_state = *parent_state;
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}
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