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# Copyright 2014-2022 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 that dcache behaves correctly when reading a cache line fails.
standard_testfile
if { [prepare_for_testing "failed to prepare" ${testfile}] } {
return -1
}
if ![runto breakpt] {
return -1
}
# Issue the "delete mem" command. This makes GDB ignore the
# target-provided list, if any.
proc delete_mem {} {
global gdb_prompt
set test "delete mem"
gdb_test_multiple $test $test {
-re "Delete all memory regions.*y or n.*$" {
send_gdb "y\n"
exp_continue
}
-re "$gdb_prompt $" {
pass $test
}
}
}
# Make the dcache line size bigger than the pagesize.
set pagesize [get_integer_valueof "pg_size" -1]
set linesize [expr $pagesize * 2]
gdb_test_no_output "set dcache line-size $linesize" \
"set dcache line size to twice the pagesize"
gdb_test "info dcache" \
"Dcache 4096 lines of $linesize bytes each.\r\nNo data cache available."
# Make sure dcache doesn't automatically skip unmapped regions.
delete_mem
gdb_test "info mem" \
"Using user-defined memory regions.\r\nThere are no memory regions defined\."
# Given the line size is bigger than the page size, we have
# alternating mapped and unmapped pages, these make dcache fail to
# fill in the cache line. GDB used to have a bug where that failure
# would end up as user-visible error. The range being disassembled is
# wholly available, so GDB should succeed.
gdb_test "disassemble first_mapped_page, +10" "End of assembler dump\."
gdb_test "disassemble last_mapped_page, +10" "End of assembler dump\."
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