derek.holloway
7502bf64a4
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74 lines
2.7 KiB
Plaintext
74 lines
2.7 KiB
Plaintext
# Copyright (C) 2023-2024 Free Software Foundation, Inc.
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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 GDB's value availability ranges.
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standard_testfile
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if { [prepare_for_testing "failed to prepare" $testfile $srcfile] } {
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return -1
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}
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if ![runto_main] then {
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perror "couldn't run to breakpoint"
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continue
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}
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set target_char_mask [get_valueof "/u" "a.x\[0]" "255" "get target char mask"]
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set target_char_bit 0
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for {set i $target_char_mask} {$i > 0} {set i [expr $i >> 1]} {
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incr target_char_bit
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}
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set target_char_rank -1
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for {set i $target_char_bit} {$i > 0} {set i [expr $i >> 1]} {
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incr target_char_rank
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}
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# Verify accesses to original inferior data.
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gdb_test "print a.a" "\\\$2 = '\\\\000' <repeats 1023 times>"
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gdb_test "print a.a\[-1\]" "\\\$3 = 0 '\\\\000'"
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gdb_test "print a.a\[1024\]" "\\\$4 = 0 '\\\\000'"
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# Verify in-range value history accesses.
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gdb_test "print \$2" "\\\$5 = '\\\\000' <repeats 1023 times>"
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gdb_test "print \$2\[0\]" "\\\$6 = 0 '\\\\000'"
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gdb_test "print \$2\[1023\]" "\\\$7 = 0 '\\\\000'"
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# Values outside the array recorded will have not been retrieved.
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gdb_test "print \$2\[-1\]" "\\\$8 = <unavailable>"
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gdb_test "print \$2\[1024\]" "\\\$9 = <unavailable>"
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gdb_test "print \$2\[-1LL << 63 - $target_char_rank\]" \
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"\\\$10 = <unavailable>"
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gdb_test "print \$2\[(1LL << 63 - $target_char_rank) - 1\]" \
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"\\\$11 = <unavailable>"
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# Accesses through pointers in history go straight to the inferior though.
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gdb_test "print \$2\[0\]@1" "\\\$12 = \"\""
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gdb_test "print \$2\[-1\]@1" "\\\$13 = \"\""
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gdb_test "print \$2\[1024\]@1" "\\\$14 = \"\""
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# Verify out-of-range value history accesses.
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gdb_test "print \$2\[(-1LL << 63 - $target_char_rank) - 1\]" \
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"Integer overflow in data location calculation"
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gdb_test "print \$2\[(1LL << 63 - $target_char_rank)\]" \
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"Integer overflow in data location calculation"
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gdb_test "print \$2\[-1LL << 63\]" \
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"Integer overflow in data location calculation"
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gdb_test "print \$2\[(1ULL << 63) - 1\]" \
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"Integer overflow in data location calculation"
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# Sanity-check a copy of an unavailable value.
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gdb_test "print \$11" "\\\$15 = <unavailable>"
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