7e09a22367
As reported in PR 17206, an internal error is triggered when command
until is executed. In infcmd.c:until_next_command, step_range_end is
set to 'pc',
if (!func)
{
struct bound_minimal_symbol msymbol = lookup_minimal_symbol_by_pc (pc);
if (msymbol.minsym == NULL)
error (_("Execution is not within a known function."));
tp->control.step_range_start = BMSYMBOL_VALUE_ADDRESS (msymbol);
tp->control.step_range_end = pc;
}
and later in infrun.c:resume, the assert below is triggered in PR
17206.
if (tp->control.may_range_step)
{
/* If we're resuming a thread with the PC out of the step
range, then we're doing some nested/finer run control
operation, like stepping the thread out of the dynamic
linker or the displaced stepping scratch pad. We
shouldn't have allowed a range step then. */
gdb_assert (pc_in_thread_step_range (pc, tp));
}
In until_next_command, we set step range to [XXX, pc), so pc isn't
within the range. pc_in_thread_step_range returns false and the
assert is triggered. AFAICS, the range we want in until_next_command
is [XXX, pc] instead of [XXX, pc), because we want to program step
until greater than pc. This patch is to set step_range_end to
'pc + 1'. Running until-nodebug.exp with unpatched GDB will get the
following fail,
FAIL: gdb.base/until-nodebug.exp: until 2 (GDB internal error)
and the fail goes away when the fix is applied.
gdb:
2014-07-29 Yao Qi <yao@codesourcery.com>
PR gdb/17206
* infcmd.c (until_next_command): Set step_range_end to PC + 1.
gdb/testsuite:
2014-07-29 Yao Qi <yao@codesourcery.com>
PR gdb/17206
* gdb.base/until-nodebug.exp: New.
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37 lines
1.3 KiB
Text
# Copyright 2014 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 that the address range for stepping is correctly set in command
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# until when there is no debug information.
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standard_testfile advance.c
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if {[prepare_for_testing "failed to prepare" $testfile $srcfile nodebug]} {
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return -1
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}
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if ![runto_main] {
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fail "Can't run to main"
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return 0
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}
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# Without debug information, the program stops at the next
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# instruction, which is still in main.
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gdb_test "until" "in main .*" "until 1"
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# If the stepping range is correctly set, the program stops at the next
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# instruction. Otherwise, an internal error will be triggered. See
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# PR gdb/17206.
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gdb_test "until" "in main .*" "until 2"
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