2015-01-01 09:32:14 +00:00
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# Copyright 2014-2015 Free Software Foundation, Inc.
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2014-05-21 12:58:16 +00:00
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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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# Test that dcache behaves correctly when reading a cache line fails.
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standard_testfile
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if { [prepare_for_testing "failed to prepare" ${testfile}] } {
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return -1
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}
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if ![runto breakpt] {
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return -1
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}
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# Issue the "delete mem" command. This makes GDB ignore the
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# target-provided list, if any.
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proc delete_mem {} {
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global gdb_prompt
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set test "delete mem"
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gdb_test_multiple $test $test {
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-re "Delete all memory regions.*y or n.*$" {
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send_gdb "y\n"
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exp_continue
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}
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-re "$gdb_prompt $" {
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pass $test
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}
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}
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}
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# Make the dcache line size bigger than the pagesize.
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set pagesize [get_integer_valueof "pg_size" -1]
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set linesize [expr $pagesize * 2]
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gdb_test_no_output "set dcache line-size $linesize" \
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"set dcache line size to twice the pagesize"
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gdb_test "info dcache" \
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"Dcache 4096 lines of $linesize bytes each.\r\nNo data cache available."
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# Make sure dcache doesn't automatically skip unmapped regions.
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delete_mem
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gdb_test "info mem" \
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"Using user-defined memory regions.\r\nThere are no memory regions defined\."
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# Given the line size is bigger than the page size, we have
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# alternating mapped and unmapped pages, these make dcache fail to
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# fill in the cache line. GDB used to have a bug where that failure
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# would end up as user-visible error. The range being disassembled is
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# wholly available, so GDB should succeed.
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gdb_test "disassemble first_mapped_page, +10" "End of assembler dump\."
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gdb_test "disassemble last_mapped_page, +10" "End of assembler dump\."
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