gdb/testsuite/gdb.dwarf2/dw2-reg-undefined.exp

# Copyright 2013-2021 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 <http://www.gnu.org/licenses/>.
load_lib dwarf.exp

# This test can only be run on targets which support DWARF-2 and use gas.
if {![dwarf2_support]} {
    return 0
}

# This test can only be run on x86_64 targets.
if {![istarget "x86_64-*-*"] || ![is_lp64_target]} {
    return 0
}

standard_testfile .S

if { [prepare_for_testing "failed to prepare" $testfile $srcfile {nodebug nopie}] } {
    return -1
}

if ![runto stop_frame] {
    perror "Failed to stop in stop_frame"
    return -1
}

gdb_test "bt" "#0  (0x\[0-9a-f\]+ in )?stop_frame \[^\r\n\]*\r\n#1  \[^\r\n\]*first_frame \[^\r\n\]*\r\n#2  \[^\r\n\]*main\[^\r\n\]*" \
    "backtrace from stop_frame"

for {set f 0} {$f < 3} {incr f} {
    if {${f} == 0} {
	set pattern_rax_rbx_rcx_print "$hex"
	set pattern_rax_rbx_rcx_info "$hex\\s+$decimal"
	set pattern_r8_r9_print "$hex"
	set pattern_r8_r9_info "$hex\\s+$decimal"
    } else {
	set pattern_rax_rbx_rcx_print "<not saved>"
	set pattern_rax_rbx_rcx_info "<not saved>"
	set pattern_r8_r9_print "$hex"
	set pattern_r8_r9_info "$hex\\s+$decimal"
    }

    # Select frame.
    gdb_test "frame ${f}" "#${f}.*" "switch to frame ${f}"

    gdb_test "p/x \$rax" ".*$pattern_rax_rbx_rcx_print.*" \
	"print \$rax in frame ${f}"
    gdb_test "p/x \$rbx" "$pattern_rax_rbx_rcx_print" \
	"print \$rbx in frame ${f}"
    gdb_test "p/x \$rcx" "$pattern_rax_rbx_rcx_print" \
	"print \$rcx in frame ${f}"

    gdb_test "p/x \$r8" "$pattern_r8_r9_print" "print \$r8 in frame ${f}"
    gdb_test "p/x \$r9" "$pattern_r8_r9_print" "print \$r9 in frame ${f}"


    # Display register values.
    gdb_test "info registers rax rbx rcx r8 r9" \
	[multi_line "rax\\s+${pattern_rax_rbx_rcx_info}\\s*" \
		    "rbx\\s+${pattern_rax_rbx_rcx_info}\\s*" \
		    "rcx\\s+${pattern_rax_rbx_rcx_info}\\s*" \
		    "r8\\s+${pattern_r8_r9_info}\\s*" \
		    "r9\\s+${pattern_r8_r9_info}\\s*"] \
	"Check values of rax, rbx, rcx, r8, r9 in frame ${f}"
}

# Test that the debug log statement in frame_unwind_register_value produces
# "not saved" and not "optimized out".
gdb_test "set debug frame 1"
gdb_test {print $rax} [multi_line \
			{    \[frame\] frame_unwind_register_value: frame=0, regnum=0\(rax\)} \
			{    \[frame\] frame_unwind_register_value:   -> <not saved>} \
			{.*}]
gdb_test "set debug frame 0"

# Test that history values show "not saved" and not "optimized out".
gdb_test "print" " = <not saved>"

# Test that convenience variables _don't_ show "not saved".
gdb_test {print $foo = $rax} " = <optimized out>"