# This testcase is part of GDB, the GNU debugger.

# Copyright 2017-2020 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/>.

# Test listing reggroups and the registers in each group.

standard_testfile

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

if ![runto_main] then {
    fail "can't run to main"
    return 0
}

set invalid_register_re "Invalid register .*"

# Fetch all reggroups from 'maint print reggroups'.

proc fetch_reggroups {test} {
    global gdb_prompt

    set reggroups {}
    gdb_test_multiple "maint print reggroups" $test {
	-re "maint print reggroups\r\n" {
	    exp_continue
	}
	-re "^ Group\[ \t\]+Type\[ \t\]+\r\n" {
	    exp_continue
	}
	-re "^ (\[_0-9a-zA-Z-\]+)\[ \t\]+(user|internal)\[ \t\]+\r\n" {
	    lappend reggroups $expect_out(1,string)
	    exp_continue
	}
	-re "$gdb_prompt $" {
	    gdb_assert "[llength $reggroups] != 0" $test
	}
    }

    return $reggroups
}

# Fetch all registers for a reggroup from 'info reg <reggroup>'.

proc fetch_reggroup_regs {reggroup test} {
    global gdb_prompt
    global invalid_register_re

    # The command info reg <reggroup> will return something like the following:
    #
    # r0             0x0      0^M
    # r1             0x7fdffc 0x7fdffc^M
    # r2             0x7fe000 0x7fe000^M
    # npc            0x23a8   0x23a8 <main+12>^M
    # sr             0x8401   [ SM CY FO CID=0 ]^M
    #
    # We parse out and return the reg names, this is done by detecting
    # that for each line we have a register name followed by a $hex number.
    #
    # Note: we will not return vector registers, but I think this is ok because
    # for testing purposes we just want to ensure we get some registers and dont
    # fail.  Example vector register:
    #
    # xmm0           {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, ... }}
    #
    set regs {}
    gdb_test_multiple "info reg $reggroup" $test {
	-re "info reg $reggroup\r\n" {
	    exp_continue
	}
	-re "^(\[0-9a-zA-Z-\]+)\[ \t\]+(0x\[0-9a-f\]+)\[ \t\]+(\[^\n\r\]+)\r\n" {
	    lappend regs $expect_out(1,string)
	    exp_continue
	}
	-re $invalid_register_re {
	    fail "$test (unexpected invalid register response)"
	}
	-re "$gdb_prompt $" {
	    pass $test
	}
    }
    return $regs
}

set reggroups [fetch_reggroups "fetch reggroups"]
set regcount 0
foreach reggroup $reggroups {
    set regs [fetch_reggroup_regs $reggroup "fetch reggroup regs $reggroup"]
    set regcount [expr $regcount + [llength $regs]]
}

gdb_assert "[llength $regcount] != 0" "system has reggroup registers"

# If this fails it means that probably someone changed the error text returned
# for an invalid register argument.  If that happens we should fix the pattern
# here and in the fetch_reggroup_regs procedure above.
gdb_test "info reg invalid-reggroup" $invalid_register_re \
    "info reg invalid-reggroup should report 'Invalid register'"