forked from Imagelibrary/binutils-gdb
a0c0791577
This commit introduces the idea of loading only part of an array in
order to print it, what I call "limited length" arrays.
The motivation behind this work is to make it possible to print slices
of very large arrays, where very large means bigger than
`max-value-size'.
Consider this GDB session with the current GDB:
(gdb) set max-value-size 100
(gdb) p large_1d_array
value requires 400 bytes, which is more than max-value-size
(gdb) p -elements 10 -- large_1d_array
value requires 400 bytes, which is more than max-value-size
notice that the request to print 10 elements still fails, even though 10
elements should be less than the max-value-size. With a patched version
of GDB:
(gdb) p -elements 10 -- large_1d_array
$1 = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9...}
So now the print has succeeded. It also has loaded `max-value-size'
worth of data into value history, so the recorded value can be accessed
consistently:
(gdb) p -elements 10 -- $1
$2 = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9...}
(gdb) p $1
$3 = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
20, 21, 22, 23, 24, <unavailable> <repeats 75 times>}
(gdb)
Accesses with other languages work similarly, although for Ada only
C-style [] array element/dimension accesses use history. For both Ada
and Fortran () array element/dimension accesses go straight to the
inferior, bypassing the value history just as with C pointers.
Co-Authored-By: Maciej W. Rozycki <macro@embecosm.com>
243 lines
9.6 KiB
Plaintext
243 lines
9.6 KiB
Plaintext
# Copyright 2023 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 limited array printing.
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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]} {
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perror "couldn't run to breakpoint"
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continue
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}
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with_test_prefix "with standard max-value size" {
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gdb_test "print large_1d_array" \
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" = \\\{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,\
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12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,\
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24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,\
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36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,\
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48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,\
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60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71,\
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72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83,\
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84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,\
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96, 97, 98, 99\\\}"
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gdb_test -nonl "output large_1d_array" \
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"\\\{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,\
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12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,\
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24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,\
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36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,\
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48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,\
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60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71,\
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72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83,\
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84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,\
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96, 97, 98, 99\\\}"
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gdb_test "print large_2d_array" \
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" = \\\{\\\{0, 1, 2, 3, 4, 5, 6, 7, 8, 9\\\},\
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\\\{10, 11, 12, 13, 14, 15, 16, 17, 18, 19\\\},\
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\\\{20, 21, 22, 23, 24, 25, 26, 27, 28, 29\\\},\
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\\\{30, 31, 32, 33, 34, 35, 36, 37, 38, 39\\\},\
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\\\{40, 41, 42, 43, 44, 45, 46, 47, 48, 49\\\},\
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\\\{50, 51, 52, 53, 54, 55, 56, 57, 58, 59\\\},\
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\\\{60, 61, 62, 63, 64, 65, 66, 67, 68, 69\\\},\
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\\\{70, 71, 72, 73, 74, 75, 76, 77, 78, 79\\\},\
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\\\{80, 81, 82, 83, 84, 85, 86, 87, 88, 89\\\},\
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\\\{90, 91, 92, 93, 94, 95, 96, 97, 98, 99\\\}\\\}"
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gdb_test -nonl "output large_2d_array" \
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"\\\{\\\{0, 1, 2, 3, 4, 5, 6, 7, 8, 9\\\},\
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\\\{10, 11, 12, 13, 14, 15, 16, 17, 18, 19\\\},\
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\\\{20, 21, 22, 23, 24, 25, 26, 27, 28, 29\\\},\
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\\\{30, 31, 32, 33, 34, 35, 36, 37, 38, 39\\\},\
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\\\{40, 41, 42, 43, 44, 45, 46, 47, 48, 49\\\},\
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\\\{50, 51, 52, 53, 54, 55, 56, 57, 58, 59\\\},\
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\\\{60, 61, 62, 63, 64, 65, 66, 67, 68, 69\\\},\
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\\\{70, 71, 72, 73, 74, 75, 76, 77, 78, 79\\\},\
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\\\{80, 81, 82, 83, 84, 85, 86, 87, 88, 89\\\},\
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\\\{90, 91, 92, 93, 94, 95, 96, 97, 98, 99\\\}\\\}"
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}
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# Set the max-value-size so we can only print 51 elements.
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set elements 51
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set int_size [get_valueof "/d" "sizeof(large_1d_array\[0\])" "*unknown*"]
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gdb_test_no_output "set max-value-size [expr $int_size * $elements]"
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with_test_prefix "with reduced max-value size" {
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gdb_test "print large_1d_array" \
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"\r\nvalue requires $decimal bytes, which is more than max-value-size"
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gdb_test "output large_1d_array" \
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"\r\nvalue requires $decimal bytes, which is more than max-value-size"
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gdb_test "print large_2d_array" \
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"\r\nvalue requires $decimal bytes, which is more than max-value-size"
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gdb_test "output large_2d_array" \
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"\r\nvalue requires $decimal bytes, which is more than max-value-size"
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}
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gdb_test_no_output "set print elements 3"
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with_test_prefix "with reduced print elements" {
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gdb_test "print large_1d_array" \
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" = \\\{0, 1, 2\\.\\.\\.\\\}"
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gdb_test -nonl "output large_1d_array" \
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"\\\{0, 1, 2\\.\\.\\.\\\}"
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gdb_test "print \$" \
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" = \\\{0, 1, 2\\.\\.\\.\\\}" \
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"print large_1d_array from history"
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gdb_test -nonl "output \$\$" \
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"\\\{0, 1, 2\\.\\.\\.\\\}" \
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"output large_1d_array from history"
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gdb_test "print large_2d_array" \
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" = \\\{\\\{0, 1, 2\\.\\.\\.\\\}, \\\{10, 11, 12\\.\\.\\.\\\},\
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\\\{20, 21, 22\\.\\.\\.\\\}\\.\\.\\.\\\}"
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gdb_test -nonl "output large_2d_array" \
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"\\\{\\\{0, 1, 2\\.\\.\\.\\\}, \\\{10, 11, 12\\.\\.\\.\\\},\
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\\\{20, 21, 22\\.\\.\\.\\\}\\.\\.\\.\\\}"
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gdb_test "print \$" \
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" = \\\{\\\{0, 1, 2\\.\\.\\.\\\}, \\\{10, 11, 12\\.\\.\\.\\\},\
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\\\{20, 21, 22\\.\\.\\.\\\}\\.\\.\\.\\\}" \
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"print large_2d_array from history"
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gdb_test -nonl "output \$\$" \
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"\\\{\\\{0, 1, 2\\.\\.\\.\\\}, \\\{10, 11, 12\\.\\.\\.\\\},\
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\\\{20, 21, 22\\.\\.\\.\\\}\\.\\.\\.\\\}" \
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"output large_2d_array from history"
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}
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gdb_test_no_output "set print elements $elements"
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with_test_prefix "with print elements matching max-value size" {
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gdb_test "print \$\$2" \
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" = \\\{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,\
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12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,\
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24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,\
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36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,\
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48, 49, 50\\.\\.\\.\\\}" \
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"print large_1d_array from history"
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gdb_test -nonl "output \$\$3" \
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"\\\{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,\
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12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,\
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24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,\
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36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,\
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48, 49, 50\\.\\.\\.\\\}" \
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"output large_1d_array from history"
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gdb_test "print \$\$2" \
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" = \\\{\\\{0, 1, 2, 3, 4, 5, 6, 7, 8, 9\\\},\
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\\\{10, 11, 12, 13, 14, 15, 16, 17, 18, 19\\\},\
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\\\{20, 21, 22, 23, 24, 25, 26, 27, 28, 29\\\},\
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\\\{30, 31, 32, 33, 34, 35, 36, 37, 38, 39\\\},\
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\\\{40, 41, 42, 43, 44, 45, 46, 47, 48, 49\\\},\
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\\\{50(?:, <unavailable>)\{9\}\\\}(?:,\
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\\\{<unavailable>(?:, <unavailable>)\{9\}\\\})\{4\}\\\}" \
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"print large_2d_array from history"
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gdb_test -nonl "output \$\$3" \
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"\\\{\\\{0, 1, 2, 3, 4, 5, 6, 7, 8, 9\\\},\
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\\\{10, 11, 12, 13, 14, 15, 16, 17, 18, 19\\\},\
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\\\{20, 21, 22, 23, 24, 25, 26, 27, 28, 29\\\},\
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\\\{30, 31, 32, 33, 34, 35, 36, 37, 38, 39\\\},\
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\\\{40, 41, 42, 43, 44, 45, 46, 47, 48, 49\\\},\
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\\\{50(?:, <unavailable>)\{9\}\\\}(?:,\
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\\\{<unavailable>(?:, <unavailable>)\{9\}\\\})\{4\}\\\}" \
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"output large_2d_array from history"
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}
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gdb_test_no_output "set max-value-size unlimited"
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gdb_test_no_output "set print elements unlimited"
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gdb_test_no_output "set print repeats 3"
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with_test_prefix "with unlimited print elements" {
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gdb_test "print \$\$" \
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" = \\\{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,\
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12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,\
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24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,\
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36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,\
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48, 49, 50, <unavailable> <repeats 49 times>\\\}" \
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"print large_1d_array from history"
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gdb_test -nonl "output \$\$2" \
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"\\\{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,\
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12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,\
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24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,\
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36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,\
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48, 49, 50, <unavailable> <repeats 49 times>\\\}" \
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"output large_1d_array from history"
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gdb_test "print \$\$" \
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" = \\\{\\\{0, 1, 2, 3, 4, 5, 6, 7, 8, 9\\\},\
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\\\{10, 11, 12, 13, 14, 15, 16, 17, 18, 19\\\},\
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\\\{20, 21, 22, 23, 24, 25, 26, 27, 28, 29\\\},\
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\\\{30, 31, 32, 33, 34, 35, 36, 37, 38, 39\\\},\
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\\\{40, 41, 42, 43, 44, 45, 46, 47, 48, 49\\\},\
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\\\{50, <unavailable> <repeats 9 times>\\\},\
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\\\{<unavailable> <repeats 10 times>\\\}\
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<repeats 4 times>\\\}" \
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"print large_2d_array from history"
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gdb_test -nonl "output \$\$2" \
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"\\\{\\\{0, 1, 2, 3, 4, 5, 6, 7, 8, 9\\\},\
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\\\{10, 11, 12, 13, 14, 15, 16, 17, 18, 19\\\},\
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\\\{20, 21, 22, 23, 24, 25, 26, 27, 28, 29\\\},\
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\\\{30, 31, 32, 33, 34, 35, 36, 37, 38, 39\\\},\
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\\\{40, 41, 42, 43, 44, 45, 46, 47, 48, 49\\\},\
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\\\{50, <unavailable> <repeats 9 times>\\\},\
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\\\{<unavailable> <repeats 10 times>\\\}\
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<repeats 4 times>\\\}" \
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"output large_2d_array from history"
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gdb_test "print \$\[4\]" \
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" = \\\{40, 41, 42, 43, 44, 45, 46, 47, 48, 49\\\}" \
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"print available large_2d_array row from history"
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gdb_test -nonl "output \$\$\[4\]" \
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"\\\{40, 41, 42, 43, 44, 45, 46, 47, 48, 49\\\}" \
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"output available large_2d_array row from history"
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gdb_test "print \$\$\[5\]" \
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" = \\\{50, <unavailable> <repeats 9 times>\\\}" \
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"print partially available large_2d_array row from history"
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gdb_test -nonl "output \$\$2\[5\]" \
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"\\\{50, <unavailable> <repeats 9 times>\\\}" \
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"output partially available large_2d_array row from history"
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gdb_test "print \$\$2\[6\]" \
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" = <unavailable>" \
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"print unavailable large_2d_array row from history"
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gdb_test -nonl "output \$\$3\[6\]" \
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"<unavailable>" \
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"output unavailable large_2d_array row from history"
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gdb_test "print \$\$3\[5\]\[0\]" \
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" = 50" \
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"print available large_2d_array element from history"
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gdb_test -nonl "output \$\$4\[5\]\[0\]" \
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"50" \
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"output available large_2d_array element from history"
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gdb_test "print \$\$4\[5\]\[1\]" \
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" = <unavailable>" \
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"print unavailable large_2d_array element from history"
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gdb_test -nonl "output \$\$5\[5\]\[1\]" \
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"<unavailable>" \
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"output unavailable large_2d_array element from history"
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gdb_test "print \$\$5\[5\]\[0\] + \$\$5\[5\]\[1\]" \
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"value is not available" \
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"print expression referring unavailable element from history"
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gdb_test "output \$\$5\[5\]\[0\] + \$\$5\[5\]\[1\]" \
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"value is not available" \
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"output expression referring unavailable element from history"
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}
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