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From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
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From: Fedora GDB patches <invalid@email.com>
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Date: Fri, 27 Oct 2017 21:07:50 +0200
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Subject: gdb-bz541866-rwatch-before-run.patch
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;; Fix i386+x86_64 rwatch+awatch before run, regression against 6.8 (BZ 541866).
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;; Fix i386 rwatch+awatch before run (BZ 688788, on top of BZ 541866).
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;;=push+jan: It should be fixed properly instead.
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diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
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--- a/gdb/breakpoint.c
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+++ b/gdb/breakpoint.c
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@@ -8773,7 +8773,7 @@ init_breakpoint_sal (struct breakpoint *b, struct gdbarch *gdbarch,
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int enabled, int internal, unsigned flags,
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int display_canonical)
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{
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- int i;
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+ int i ATTRIBUTE_UNUSED;
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if (type == bp_hardware_breakpoint)
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{
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@@ -14271,7 +14271,7 @@ enable_breakpoint_disp (struct breakpoint *bpt, enum bpdisp disposition,
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if (bpt->type == bp_hardware_breakpoint)
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{
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- int i;
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+ int i ATTRIBUTE_UNUSED;
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i = hw_breakpoint_used_count ();
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target_resources_ok =
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target_can_use_hardware_watchpoint (bp_hardware_breakpoint,
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diff --git a/gdb/config/i386/nm-linux.h b/gdb/config/i386/nm-linux.h
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new file mode 100644
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--- /dev/null
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+++ b/gdb/config/i386/nm-linux.h
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@@ -0,0 +1,28 @@
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+/* Native support for GNU/Linux i386.
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+
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+ Copyright 2010 Free Software Foundation, Inc.
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+
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+ This file is part of GDB.
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+
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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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+
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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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+
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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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+
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+#ifndef NM_LINUX_H
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+#define NM_LINUX_H
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+
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+#include "config/nm-linux.h"
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+
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+/* Red Hat backward compatibility with gdb-6.8. */
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+#define target_can_use_hardware_watchpoint(type, cnt, ot) 1
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+
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+#endif /* NM_LINUX64_H */
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diff --git a/gdb/config/i386/nm-linux64.h b/gdb/config/i386/nm-linux64.h
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new file mode 100644
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--- /dev/null
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+++ b/gdb/config/i386/nm-linux64.h
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@@ -0,0 +1,28 @@
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+/* Native support for GNU/Linux amd64.
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+
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+ Copyright 2010 Free Software Foundation, Inc.
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+
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+ This file is part of GDB.
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+
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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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+
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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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+
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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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+
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+#ifndef NM_LINUX64_H
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+#define NM_LINUX64_H
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+
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+#include "config/nm-linux.h"
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+
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+/* Red Hat backward compatibility with gdb-6.8. */
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+#define target_can_use_hardware_watchpoint(type, cnt, ot) 1
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+
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+#endif /* NM_LINUX64_H */
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diff --git a/gdb/configure.nat b/gdb/configure.nat
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--- a/gdb/configure.nat
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+++ b/gdb/configure.nat
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@@ -245,6 +245,7 @@ case ${gdb_host} in
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;;
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i386)
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# Host: Intel 386 running GNU/Linux.
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+ NAT_FILE="${srcdir}/config/${gdb_host_cpu}/nm-linux.h"
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NATDEPFILES="${NATDEPFILES} x86-nat.o nat/x86-dregs.o \
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i386-linux-nat.o x86-linux-nat.o nat/linux-btrace.o \
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nat/x86-linux.o nat/x86-linux-dregs.o"
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@@ -301,6 +302,7 @@ case ${gdb_host} in
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case ${gdb_host_cpu} in
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i386)
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# Host: GNU/Linux x86-64
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+ NAT_FILE="${srcdir}/config/${gdb_host_cpu}/nm-linux64.h"
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NATDEPFILES="${NATDEPFILES} x86-nat.o nat/x86-dregs.o \
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amd64-nat.o amd64-linux-nat.o x86-linux-nat.o \
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nat/linux-btrace.o \
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diff --git a/gdb/target.h b/gdb/target.h
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--- a/gdb/target.h
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+++ b/gdb/target.h
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@@ -1971,9 +1971,11 @@ extern struct thread_info *target_thread_handle_to_thread_info
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one. OTHERTYPE is the number of watchpoints of other types than
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this one used so far. */
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+#ifndef target_can_use_hardware_watchpoint
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#define target_can_use_hardware_watchpoint(TYPE,CNT,OTHERTYPE) \
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(current_top_target ()->can_use_hw_breakpoint) ( \
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TYPE, CNT, OTHERTYPE)
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+#endif
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/* Returns the number of debug registers needed to watch the given
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memory region, or zero if not supported. */
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diff --git a/gdb/testsuite/gdb.base/watchpoint-hw-before-run.exp b/gdb/testsuite/gdb.base/watchpoint-hw-before-run.exp
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new file mode 100644
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--- /dev/null
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+++ b/gdb/testsuite/gdb.base/watchpoint-hw-before-run.exp
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@@ -0,0 +1,40 @@
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+# Copyright 2009, 2010 Free Software Foundation, Inc.
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+
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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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+#
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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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+#
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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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+
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+# Arch not supporting hw watchpoints does not imply no_hardware_watchpoints set.
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+if {(![istarget "i?86-*-*"] && ![istarget "x86_64-*-*"]
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+ && ![istarget "ia64-*-*"])
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+ || [target_info exists gdb,no_hardware_watchpoints]} then {
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+ verbose "Skipping watchpoint-hw-before-run test."
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+ return
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+}
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+
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+set test watchpoint-hw-before-run
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+set srcfile watchpoint-hw-hit-once.c
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+if { [prepare_for_testing ${test}.exp ${test} ${srcfile}] } {
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+ return -1
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+}
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+
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+gdb_test "rwatch watchee" "ardware read watchpoint 1: watchee"
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+
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+# `runto_main' or `runto main' would delete the watchpoint created above.
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+
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+if { [gdb_start_cmd] < 0 } {
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+ untested start
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+ return -1
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+}
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+gdb_test "" "main .* at .*" "start"
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+
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+gdb_test "continue" "Continuing.\r\n\r\nHardware read watchpoint \[0-9\]+: watchee\r\n\r\nValue = 0\r\n.*"
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