forked from Imagelibrary/binutils-gdb
626d23209f
Consider test-case test.c:
...
$ cat test.c
int main (void) {
return 0;
L1:
(void)0;
}
...
Compiled with debug info:
...
$ gcc test.c -g
...
When attempting to set a breakpoint at L1, which is a label without address:
...
<1><f4>: Abbrev Number: 2 (DW_TAG_subprogram)
<f5> DW_AT_name : main
<2><115>: Abbrev Number: 3 (DW_TAG_label)
<116> DW_AT_name : L1
<119> DW_AT_decl_file : 1
<11a> DW_AT_decl_line : 5
<2><11b>: Abbrev Number: 0
...
we run into an internal-error:
...
$ gdb -batch a.out -ex "b main:L1"
linespec.c:3233: internal-error: void \
decode_line_full(const event_location*, int, program_space*, symtab*, \
int, linespec_result*, const char*, const char*): \
Assertion `result.size () == 1 || canonical->pre_expanded' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
...
Fix this by detecting the error condition in decode_line_full instead, and
throwing an error, such that we have instead:
...
(gdb) b main:L1
Location main:L1 not available
(gdb)
...
Unfortunately, to call event_location_to_string, which is used to get the
location name in the error message, we need to pass a non-const struct
event_location, because the call may cache the string in the struct (See
EL_STRING). So, we change the prototype of decode_line_full accordingly, and
everywhere this propages to.
Tested on x86_64-linux.
gdb/ChangeLog:
2020-08-28 Tom de Vries <tdevries@suse.de>
PR breakpoint/26544
* breakpoint.c (parse_breakpoint_sals): Remove const from struct
event_location.
(create_breakpoint): Same.
(base_breakpoint_decode_location): Same.
(bkpt_create_sals_from_location): Same.
(bkpt_decode_location): Same.
(bkpt_probe_create_sals_from_location): Same.
(bkpt_probe_decode_location): Same.
(tracepoint_create_sals_from_location): Same.
(tracepoint_decode_location): Same.
(tracepoint_probe_decode_location): Same.
(strace_marker_create_sals_from_location): Same.
(strace_marker_decode_location): Same.
(create_sals_from_location_default): Same.
(decode_location_default): Same.
* breakpoint.h (struct breakpoint_ops): Same.
(create_breakpoint): Same.
* linespec.h (decode_line_full): Same.
* linespec.c (decode_line_full): Same. Throw error if
result.size () == 0.
gdb/testsuite/ChangeLog:
2020-08-28 Tom de Vries <tdevries@suse.de>
* gdb.base/label-without-address.c: New test.
* gdb.base/label-without-address.exp: New file.
25 lines
797 B
C
25 lines
797 B
C
/* This testcase is part of GDB, the GNU debugger.
|
|
|
|
Copyright 2020 Free Software Foundation, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
return 0;
|
|
L1:
|
|
(void)0;
|
|
}
|