From FEDORA_PATCHES Mon Sep 17 00:00:00 2001 From: Fedora GDB patches Date: Fri, 27 Oct 2017 21:07:50 +0200 Subject: gdb-bz541866-rwatch-before-run.patch ;; Fix i386+x86_64 rwatch+awatch before run, regression against 6.8 (BZ 541866). ;; Fix i386 rwatch+awatch before run (BZ 688788, on top of BZ 541866). ;;=push+jan: It should be fixed properly instead. diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c --- a/gdb/breakpoint.c +++ b/gdb/breakpoint.c @@ -8773,7 +8773,7 @@ init_breakpoint_sal (struct breakpoint *b, struct gdbarch *gdbarch, int enabled, int internal, unsigned flags, int display_canonical) { - int i; + int i ATTRIBUTE_UNUSED; if (type == bp_hardware_breakpoint) { @@ -14271,7 +14271,7 @@ enable_breakpoint_disp (struct breakpoint *bpt, enum bpdisp disposition, if (bpt->type == bp_hardware_breakpoint) { - int i; + int i ATTRIBUTE_UNUSED; i = hw_breakpoint_used_count (); target_resources_ok = target_can_use_hardware_watchpoint (bp_hardware_breakpoint, diff --git a/gdb/config/i386/nm-linux.h b/gdb/config/i386/nm-linux.h new file mode 100644 --- /dev/null +++ b/gdb/config/i386/nm-linux.h @@ -0,0 +1,28 @@ +/* Native support for GNU/Linux i386. + + Copyright 2010 Free Software Foundation, Inc. + + This file is part of GDB. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ + +#ifndef NM_LINUX_H +#define NM_LINUX_H + +#include "config/nm-linux.h" + +/* Red Hat backward compatibility with gdb-6.8. */ +#define target_can_use_hardware_watchpoint(type, cnt, ot) 1 + +#endif /* NM_LINUX64_H */ diff --git a/gdb/config/i386/nm-linux64.h b/gdb/config/i386/nm-linux64.h new file mode 100644 --- /dev/null +++ b/gdb/config/i386/nm-linux64.h @@ -0,0 +1,28 @@ +/* Native support for GNU/Linux amd64. + + Copyright 2010 Free Software Foundation, Inc. + + This file is part of GDB. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ + +#ifndef NM_LINUX64_H +#define NM_LINUX64_H + +#include "config/nm-linux.h" + +/* Red Hat backward compatibility with gdb-6.8. */ +#define target_can_use_hardware_watchpoint(type, cnt, ot) 1 + +#endif /* NM_LINUX64_H */ diff --git a/gdb/configure.nat b/gdb/configure.nat --- a/gdb/configure.nat +++ b/gdb/configure.nat @@ -245,6 +245,7 @@ case ${gdb_host} in ;; i386) # Host: Intel 386 running GNU/Linux. + NAT_FILE="${srcdir}/config/${gdb_host_cpu}/nm-linux.h" NATDEPFILES="${NATDEPFILES} x86-nat.o nat/x86-dregs.o \ i386-linux-nat.o x86-linux-nat.o nat/linux-btrace.o \ nat/x86-linux.o nat/x86-linux-dregs.o" @@ -301,6 +302,7 @@ case ${gdb_host} in case ${gdb_host_cpu} in i386) # Host: GNU/Linux x86-64 + NAT_FILE="${srcdir}/config/${gdb_host_cpu}/nm-linux64.h" NATDEPFILES="${NATDEPFILES} x86-nat.o nat/x86-dregs.o \ amd64-nat.o amd64-linux-nat.o x86-linux-nat.o \ nat/linux-btrace.o \ diff --git a/gdb/target.h b/gdb/target.h --- a/gdb/target.h +++ b/gdb/target.h @@ -1971,9 +1971,11 @@ extern struct thread_info *target_thread_handle_to_thread_info one. OTHERTYPE is the number of watchpoints of other types than this one used so far. */ +#ifndef target_can_use_hardware_watchpoint #define target_can_use_hardware_watchpoint(TYPE,CNT,OTHERTYPE) \ (current_top_target ()->can_use_hw_breakpoint) ( \ TYPE, CNT, OTHERTYPE) +#endif /* Returns the number of debug registers needed to watch the given memory region, or zero if not supported. */ diff --git a/gdb/testsuite/gdb.base/watchpoint-hw-before-run.exp b/gdb/testsuite/gdb.base/watchpoint-hw-before-run.exp new file mode 100644 --- /dev/null +++ b/gdb/testsuite/gdb.base/watchpoint-hw-before-run.exp @@ -0,0 +1,40 @@ +# Copyright 2009, 2010 Free Software Foundation, Inc. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +# Arch not supporting hw watchpoints does not imply no_hardware_watchpoints set. +if {(![istarget "i?86-*-*"] && ![istarget "x86_64-*-*"] + && ![istarget "ia64-*-*"]) + || [target_info exists gdb,no_hardware_watchpoints]} then { + verbose "Skipping watchpoint-hw-before-run test." + return +} + +set test watchpoint-hw-before-run +set srcfile watchpoint-hw-hit-once.c +if { [prepare_for_testing ${test}.exp ${test} ${srcfile}] } { + return -1 +} + +gdb_test "rwatch watchee" "ardware read watchpoint 1: watchee" + +# `runto_main' or `runto main' would delete the watchpoint created above. + +if { [gdb_start_cmd] < 0 } { + untested start + return -1 +} +gdb_test "" "main .* at .*" "start" + +gdb_test "continue" "Continuing.\r\n\r\nHardware read watchpoint \[0-9\]+: watchee\r\n\r\nValue = 0\r\n.*"