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>
264 lines
10 KiB
Text
264 lines
10 KiB
Text
# Copyright 2023 Free Software Foundation, Inc.
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#
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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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load_lib "ada.exp"
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require allow_ada_tests
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standard_ada_testfile foo
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if {[gdb_compile_ada "${srcfile}" "${binfile}" executable \
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[list debug ]] != "" } {
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return -1
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}
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clean_restart ${testfile}
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set bp_location [gdb_get_line_number "STOP" ${testdir}/foo.adb]
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if {![runto "foo.adb:$bp_location"]} {
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perror "Couldn't run ${testfile}"
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return
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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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" = \\(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,\
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13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,\
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25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36,\
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37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,\
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49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60,\
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61, 62, 63, 64\\)"
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gdb_test -nonl "output Large_1d_Array" \
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"\\(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,\
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13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,\
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25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36,\
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37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,\
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49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60,\
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61, 62, 63, 64\\)"
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gdb_test "print Large_3d_Array" \
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" = \\(\\(\\(1, 2, 3, 4\\), \\(5, 6, 7, 8\\),\
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\\(9, 10, 11, 12\\), \\(13, 14, 15, 16\\)\\),\
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\\(\\(17, 18, 19, 20\\), \\(21, 22, 23, 24\\),\
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\\(25, 26, 27, 28\\), \\(29, 30, 31, 32\\)\\),\
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\\(\\(33, 34, 35, 36\\), \\(37, 38, 39, 40\\),\
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\\(41, 42, 43, 44\\), \\(45, 46, 47, 48\\)\\),\
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\\(\\(49, 50, 51, 52\\), \\(53, 54, 55, 56\\),\
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\\(57, 58, 59, 60\\), \\(61, 62, 63, 64\\)\\)\\)"
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gdb_test -nonl "output Large_3d_Array" \
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"\\(\\(\\(1, 2, 3, 4\\), \\(5, 6, 7, 8\\),\
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\\(9, 10, 11, 12\\), \\(13, 14, 15, 16\\)\\),\
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\\(\\(17, 18, 19, 20\\), \\(21, 22, 23, 24\\),\
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\\(25, 26, 27, 28\\), \\(29, 30, 31, 32\\)\\),\
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\\(\\(33, 34, 35, 36\\), \\(37, 38, 39, 40\\),\
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\\(41, 42, 43, 44\\), \\(45, 46, 47, 48\\)\\),\
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\\(\\(49, 50, 51, 52\\), \\(53, 54, 55, 56\\),\
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\\(57, 58, 59, 60\\), \\(61, 62, 63, 64\\)\\)\\)"
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}
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# Set the max-value-size so we can only print 33 elements.
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set elements 33
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set elem_size [get_valueof "/d" "(Large_1d_Array(1)'Size + 7) / 8" "*unknown*"]
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gdb_test_no_output "set max-value-size [expr $elem_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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"value of type `.*' requires $decimal bytes,\
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which is more than max-value-size"
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gdb_test "output Large_1d_Array" \
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"value of type `.*' requires $decimal bytes,\
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which is more than max-value-size"
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gdb_test "print Large_3d_Array" \
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"value of type `.*' requires $decimal bytes,\
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which is more than max-value-size"
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gdb_test "output Large_3d_Array" \
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"value of type `.*' requires $decimal bytes,\
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which is more than max-value-size"
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}
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with_test_prefix "with reduced print -elements flag" {
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gdb_test "print -elements 2 -- Large_1d_Array" \
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" = \\(1, 2\\.\\.\\.\\)"
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gdb_test "print -elements 2 -- Large_3d_Array" \
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" = \\(\\(\\(1, 2\\.\\.\\.\\), \\(5, 6\\.\\.\\.\\)\\.\\.\\.\\),\
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\\(\\(17, 18\\.\\.\\.\\),\
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\\(21, 22\\.\\.\\.\\)\\.\\.\\.\\)\\.\\.\\.\\)"
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}
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gdb_test_no_output "set print elements 2"
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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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" = \\(1, 2\\.\\.\\.\\)"
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gdb_test -nonl "output Large_1d_Array" \
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"\\(1, 2\\.\\.\\.\\)"
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gdb_test "print \$" \
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" = \\(1, 2\\.\\.\\.\\)" \
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"print Large_1d_Array from history"
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gdb_test -nonl "output \$\$" \
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"\\(1, 2\\.\\.\\.\\)" \
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"output Large_1d_Array from history"
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gdb_test "print Large_3d_Array" \
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" = \\(\\(\\(1, 2\\.\\.\\.\\), \\(5, 6\\.\\.\\.\\)\\.\\.\\.\\),\
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\\(\\(17, 18\\.\\.\\.\\),\
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\\(21, 22\\.\\.\\.\\)\\.\\.\\.\\)\\.\\.\\.\\)"
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gdb_test -nonl "output Large_3d_Array" \
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"\\(\\(\\(1, 2\\.\\.\\.\\), \\(5, 6\\.\\.\\.\\)\\.\\.\\.\\),\
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\\(\\(17, 18\\.\\.\\.\\),\
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\\(21, 22\\.\\.\\.\\)\\.\\.\\.\\)\\.\\.\\.\\)"
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gdb_test "print \$" \
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" = \\(\\(\\(1, 2\\.\\.\\.\\), \\(5, 6\\.\\.\\.\\)\\.\\.\\.\\),\
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\\(\\(17, 18\\.\\.\\.\\),\
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\\(21, 22\\.\\.\\.\\)\\.\\.\\.\\)\\.\\.\\.\\)" \
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"print Large_3d_Array from history"
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gdb_test -nonl "output \$\$" \
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"\\(\\(\\(1, 2\\.\\.\\.\\), \\(5, 6\\.\\.\\.\\)\\.\\.\\.\\),\
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\\(\\(17, 18\\.\\.\\.\\),\
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\\(21, 22\\.\\.\\.\\)\\.\\.\\.\\)\\.\\.\\.\\)" \
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"output Large_3d_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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" = \\(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,\
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13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,\
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25, 26, 27, 28, 29, 30, 31, 32, 33\\.\\.\\.\\)" \
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"print Large_1d_Array from history"
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gdb_test -nonl "output \$\$3" \
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"\\(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,\
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13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,\
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25, 26, 27, 28, 29, 30, 31, 32, 33\\.\\.\\.\\)" \
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"output Large_1d_Array from history"
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gdb_test "print \$\$2" \
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" = \\(\\(\\(1, 2, 3, 4\\), \\(5, 6, 7, 8\\),\
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\\(9, 10, 11, 12\\), \\(13, 14, 15, 16\\)\\),\
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\\(\\(17, 18, 19, 20\\), \\(21, 22, 23, 24\\),\
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\\(25, 26, 27, 28\\), \\(29, 30, 31, 32\\)\\),\
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\\(\\(33(?:, <unavailable>)\{3\}\\)(?:,\
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\\(<unavailable>(?:, <unavailable>)\{3\}\\))\{3\}\\),\
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\\(\\(<unavailable>(?:, <unavailable>)\{3\}\\)(?:,\
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\\(<unavailable>(?:, <unavailable>)\{3\}\\))\{3\}\\)\\)" \
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"print Large_3d_Array from history"
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gdb_test -nonl "output \$\$3" \
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"\\(\\(\\(1, 2, 3, 4\\), \\(5, 6, 7, 8\\),\
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\\(9, 10, 11, 12\\), \\(13, 14, 15, 16\\)\\),\
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\\(\\(17, 18, 19, 20\\), \\(21, 22, 23, 24\\),\
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\\(25, 26, 27, 28\\), \\(29, 30, 31, 32\\)\\),\
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\\(\\(33(?:, <unavailable>)\{3\}\\)(?:,\
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\\(<unavailable>(?:, <unavailable>)\{3\}\\))\{3\}\\),\
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\\(\\(<unavailable>(?:, <unavailable>)\{3\}\\)(?:,\
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\\(<unavailable>(?:, <unavailable>)\{3\}\\))\{3\}\\)\\)" \
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"output Large_3d_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 2"
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with_test_prefix "with unlimited print elements" {
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gdb_test "print \$\$" \
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" = \\(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,\
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13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,\
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25, 26, 27, 28, 29, 30, 31, 32, 33,\
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<unavailable> <repeats 31 times>\\)" \
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"print Large_1d_Array from history"
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gdb_test -nonl "output \$\$2" \
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"\\(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,\
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13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,\
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25, 26, 27, 28, 29, 30, 31, 32, 33,\
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<unavailable> <repeats 31 times>\\)" \
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"output Large_1d_Array from history"
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gdb_test "print \$\$" \
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" = \\(\\(\\(1, 2, 3, 4\\), \\(5, 6, 7, 8\\),\
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\\(9, 10, 11, 12\\), \\(13, 14, 15, 16\\)\\),\
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\\(\\(17, 18, 19, 20\\), \\(21, 22, 23, 24\\),\
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\\(25, 26, 27, 28\\), \\(29, 30, 31, 32\\)\\),\
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\\(\\(33, <unavailable> <repeats 3 times>\\),\
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\\(<unavailable> <repeats 4 times>\\) <repeats 3 times>\\),\
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\\(\\(<unavailable> <repeats 4 times>\\)\
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<repeats 4 times>\\)\\)" \
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"print Large_3d_Array from history"
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gdb_test -nonl "output \$\$2" \
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"\\(\\(\\(1, 2, 3, 4\\), \\(5, 6, 7, 8\\),\
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\\(9, 10, 11, 12\\), \\(13, 14, 15, 16\\)\\),\
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\\(\\(17, 18, 19, 20\\), \\(21, 22, 23, 24\\),\
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\\(25, 26, 27, 28\\), \\(29, 30, 31, 32\\)\\),\
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\\(\\(33, <unavailable> <repeats 3 times>\\),\
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\\(<unavailable> <repeats 4 times>\\) <repeats 3 times>\\),\
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\\(\\(<unavailable> <repeats 4 times>\\) <repeats 4 times>\\)\\)" \
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"output Large_3d_Array from history"
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gdb_test "print \$\[2\]" \
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" = \\(\\(17, 18, 19, 20\\), \\(21, 22, 23, 24\\),\
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\\(25, 26, 27, 28\\), \\(29, 30, 31, 32\\)\\)" \
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"print available Large_3d_Array row from history"
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gdb_test -nonl "output \$\$\[2\]" \
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"\\(\\(17, 18, 19, 20\\), \\(21, 22, 23, 24\\),\
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\\(25, 26, 27, 28\\), \\(29, 30, 31, 32\\)\\)" \
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"output available Large_3d_Array row from history"
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gdb_test "print \$\$\[3\]" \
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" = \\(\\(33, <unavailable> <repeats 3 times>\\),\
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\\(<unavailable> <repeats 4 times>\\) <repeats 3 times>\\)" \
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"print partially available Large_3d_Array row from history"
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gdb_test -nonl "output \$\$2\[3\]" \
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"\\(\\(33, <unavailable> <repeats 3 times>\\),\
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\\(<unavailable> <repeats 4 times>\\) <repeats 3 times>\\)" \
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"output partially available Large_3d_Array row from history"
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# These go straigth to the inferior.
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gdb_test "print \$\$2(3)" \
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" = \\(\\(33, 34, 35, 36\\), \\(37, 38, 39, 40\\),\
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\\(41, 42, 43, 44\\), \\(45, 46, 47, 48\\)\\)" \
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"print partially available Large_3d_Array row bypassing history"
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gdb_test -nonl "output \$\$3(3)" \
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"\\(\\(33, 34, 35, 36\\), \\(37, 38, 39, 40\\),\
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\\(41, 42, 43, 44\\), \\(45, 46, 47, 48\\)\\)" \
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"output partially available Large_3d_Array row bypassing history"
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gdb_test "print \$\$3\[4\]" \
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" = <unavailable>" \
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"print unavailable Large_3d_Array row from history"
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gdb_test -nonl "output \$\$4\[4\]" \
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"<unavailable>" \
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"output unavailable Large_3d_Array row from history"
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gdb_test "print \$\$4\[3\]\[1\]\[1\]" \
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" = 33" \
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"print available Large_3d_Array element from history"
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gdb_test -nonl "output \$\$5\[3\]\[1\]\[1\]" \
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"33" \
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"output available Large_3d_Array element from history"
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gdb_test "print \$\$5\[3\]\[1\]\[2\]" \
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" = <unavailable>" \
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"print unavailable Large_3d_Array element from history"
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gdb_test -nonl "output \$\$6\[3\]\[1\]\[2\]" \
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"<unavailable>" \
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"output unavailable Large_3d_Array element from history"
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gdb_test "print \$\$6\[3\]\[1\]\[1\] + \$\$6\[3\]\[1\]\[2\]" \
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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 \$\$6\[3\]\[1\]\[1\] + \$\$6\[3\]\[1\]\[2\]" \
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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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