0c3acc0923
The problem is printing the wrong value for dynamic local variables when using the "info locals" command. Consider the following code: procedure Print (I1 : Positive; I2 : Positive) is type My_String is array (I1 .. I2) of Character; I : My_String := (others => 'A'); S : String (1 .. I2 + 3) := (others => ' '); begin S (I1 .. I2) := String (I); -- BREAK Put_Line (S); end Print; After the debugger stopped at BREAK, we try printing all local variables. Here is what we get: (gdb) info locals i = "["00"]["00"]" s = "["00"]["00"]["00"]["00"]["00"]["00"]["00"]["00"]" Curiously, printing their value using the "print" command works: (gdb) print i $1 = "AA" (gdb) print s $2 = " " We traced the problem to trying to get the contents of a variable (call to value_contents) before "fix'ing" it. For those not familiar with the Ada language support, "fixing" a value consists of swapping the value's dynamic type with a static version that is appropriate for our actual value. As a result, the dynamic type was used to determine the value size, which is zero, and thus the value contents was empty. gdb/ChangeLog: * valprint.c (common_val_print): Fix the value before extracting its contents. * ada-lang.c (ada_to_fixed_value): Make this function extern. * ada-lang.h (ada_to_fixed_value): New function declaration. * ada-valprint.c (ada_value_print): Use ada_to_fixed_value to avoid code duplication and fix a bug in the handling of fixed types contents. gdb/testsuite/ChangeLog: * gdb.ada/dyn_loc: New testcase.
53 lines
1.6 KiB
Text
53 lines
1.6 KiB
Text
# Copyright 2010 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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if $tracelevel then {
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strace $tracelevel
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}
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load_lib "ada.exp"
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set testdir "dyn_loc"
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set testfile "${testdir}/p"
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set srcfile ${srcdir}/${subdir}/${testfile}.adb
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set binfile ${objdir}/${subdir}/${testfile}
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file mkdir ${objdir}/${subdir}/${testdir}
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if {[gdb_compile_ada "${srcfile}" "${binfile}" executable [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 "BREAK" ${testdir}/pack.adb]
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if ![runto "pack.adb:$bp_location" ] then {
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return -1
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}
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set eol "\[\r\n\]+"
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set test "info locals"
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gdb_test_multiple "$test" "$test" {
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-re "i = \"AA\"${eol}s = \" \"" {
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pass $test
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}
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-re "i = \"AA\"${eol}.*${eol}s = \" \"" {
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# The debugger printed the two local variable correctly, but
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# it probably failed to NOT print some variables internally
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# generated by the compiler. This is a known issue.
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xfail $test
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}
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}
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