Convert the unavailable vector to be bit, not byte, based.
https://sourceware.org/ml/gdb-patches/2013-12/msg00144.html
The vector of unavailable parts of a value is currently byte based. Given
that we can model a value down to the bit level, we can potentially loose
information with the current implementation. After this patch we model the
unavailable information in bits.
gdb/ChangeLog
* dwarf2loc.c (read_pieced_value): Mark bits, not bytes
unavailable, use correct bit length.
* value.c (struct value): Extend comment on unavailable to
indicate that it is bit based.
(value_bits_available): New function.
(value_bytes_available): Call value_bits_available.
(value_entirely_available): Check against the bit length, not byte
length.
(mark_value_bits_unavailable): New function.
(mark_value_bytes_unavailable): Move contents to
mark_value_bits_unavailable, call to same.
(memcmp_with_bit_offsets): New function.
(value_available_contents_bits_eq): New function, takes the
functionality from value_available_contents_eq but uses
memcmp_with_bit_offsets now, and is bit not byte based.
(value_available_contents_eq): Move implementation into
value_available_contents_bits_eq, call to same.
(value_contents_copy_raw): Work on bits, not bytes.
(unpack_value_bits_as_long_1): Check availability in bits, not
bytes.
* value.h (value_bits_available): Declare new function.
(mark_value_bits_unavailable): Declare new function.
gdb/testsuite/ChangeLog
* gdb.trace/unavailable-dwarf-piece.c: New file.
* gdb.trace/unavailable-dwarf-piece.exp: New file.
2013-12-17 18:18:44 +01:00
|
|
|
/* This testcase is part of GDB, the GNU debugger.
|
|
|
|
|
2018-01-01 05:43:02 +01:00
|
|
|
Copyright 2013-2018 Free Software Foundation, Inc.
|
Convert the unavailable vector to be bit, not byte, based.
https://sourceware.org/ml/gdb-patches/2013-12/msg00144.html
The vector of unavailable parts of a value is currently byte based. Given
that we can model a value down to the bit level, we can potentially loose
information with the current implementation. After this patch we model the
unavailable information in bits.
gdb/ChangeLog
* dwarf2loc.c (read_pieced_value): Mark bits, not bytes
unavailable, use correct bit length.
* value.c (struct value): Extend comment on unavailable to
indicate that it is bit based.
(value_bits_available): New function.
(value_bytes_available): Call value_bits_available.
(value_entirely_available): Check against the bit length, not byte
length.
(mark_value_bits_unavailable): New function.
(mark_value_bytes_unavailable): Move contents to
mark_value_bits_unavailable, call to same.
(memcmp_with_bit_offsets): New function.
(value_available_contents_bits_eq): New function, takes the
functionality from value_available_contents_eq but uses
memcmp_with_bit_offsets now, and is bit not byte based.
(value_available_contents_eq): Move implementation into
value_available_contents_bits_eq, call to same.
(value_contents_copy_raw): Work on bits, not bytes.
(unpack_value_bits_as_long_1): Check availability in bits, not
bytes.
* value.h (value_bits_available): Declare new function.
(mark_value_bits_unavailable): Declare new function.
gdb/testsuite/ChangeLog
* gdb.trace/unavailable-dwarf-piece.c: New file.
* gdb.trace/unavailable-dwarf-piece.exp: New file.
2013-12-17 18:18:44 +01:00
|
|
|
|
|
|
|
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/>. */
|
|
|
|
|
|
|
|
struct s
|
|
|
|
{
|
|
|
|
unsigned char a;
|
|
|
|
unsigned char b;
|
|
|
|
unsigned char c;
|
|
|
|
};
|
|
|
|
|
|
|
|
struct t
|
|
|
|
{
|
|
|
|
/* First, a complete byte. */
|
|
|
|
unsigned char a;
|
|
|
|
/* Next, 8 single bits. */
|
|
|
|
unsigned char b : 1;
|
|
|
|
unsigned char c : 1;
|
|
|
|
unsigned char d : 1;
|
|
|
|
unsigned char e : 1;
|
|
|
|
unsigned char f : 1;
|
|
|
|
unsigned char g : 1;
|
|
|
|
unsigned char h : 1;
|
|
|
|
unsigned char i : 1;
|
|
|
|
/* Now another byte. */
|
|
|
|
unsigned char j;
|
|
|
|
};
|
|
|
|
|
|
|
|
void
|
|
|
|
end (void)
|
|
|
|
{
|
|
|
|
/* Nothing. */
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
dummy (void)
|
|
|
|
{
|
|
|
|
/* Nothing. */
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
foo (struct s x, struct s y, struct s z)
|
|
|
|
{
|
2016-03-05 14:48:47 +01:00
|
|
|
asm (".global foo_start_lbl\nfoo_start_lbl:");
|
Convert the unavailable vector to be bit, not byte, based.
https://sourceware.org/ml/gdb-patches/2013-12/msg00144.html
The vector of unavailable parts of a value is currently byte based. Given
that we can model a value down to the bit level, we can potentially loose
information with the current implementation. After this patch we model the
unavailable information in bits.
gdb/ChangeLog
* dwarf2loc.c (read_pieced_value): Mark bits, not bytes
unavailable, use correct bit length.
* value.c (struct value): Extend comment on unavailable to
indicate that it is bit based.
(value_bits_available): New function.
(value_bytes_available): Call value_bits_available.
(value_entirely_available): Check against the bit length, not byte
length.
(mark_value_bits_unavailable): New function.
(mark_value_bytes_unavailable): Move contents to
mark_value_bits_unavailable, call to same.
(memcmp_with_bit_offsets): New function.
(value_available_contents_bits_eq): New function, takes the
functionality from value_available_contents_eq but uses
memcmp_with_bit_offsets now, and is bit not byte based.
(value_available_contents_eq): Move implementation into
value_available_contents_bits_eq, call to same.
(value_contents_copy_raw): Work on bits, not bytes.
(unpack_value_bits_as_long_1): Check availability in bits, not
bytes.
* value.h (value_bits_available): Declare new function.
(mark_value_bits_unavailable): Declare new function.
gdb/testsuite/ChangeLog
* gdb.trace/unavailable-dwarf-piece.c: New file.
* gdb.trace/unavailable-dwarf-piece.exp: New file.
2013-12-17 18:18:44 +01:00
|
|
|
dummy ();
|
|
|
|
asm (".global foo_end_lbl\nfoo_end_lbl:");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
bar (struct t x, struct t y, struct t z)
|
|
|
|
{
|
2016-03-05 14:48:47 +01:00
|
|
|
asm (".global bar_start_lbl\nbar_start_lbl:");
|
Convert the unavailable vector to be bit, not byte, based.
https://sourceware.org/ml/gdb-patches/2013-12/msg00144.html
The vector of unavailable parts of a value is currently byte based. Given
that we can model a value down to the bit level, we can potentially loose
information with the current implementation. After this patch we model the
unavailable information in bits.
gdb/ChangeLog
* dwarf2loc.c (read_pieced_value): Mark bits, not bytes
unavailable, use correct bit length.
* value.c (struct value): Extend comment on unavailable to
indicate that it is bit based.
(value_bits_available): New function.
(value_bytes_available): Call value_bits_available.
(value_entirely_available): Check against the bit length, not byte
length.
(mark_value_bits_unavailable): New function.
(mark_value_bytes_unavailable): Move contents to
mark_value_bits_unavailable, call to same.
(memcmp_with_bit_offsets): New function.
(value_available_contents_bits_eq): New function, takes the
functionality from value_available_contents_eq but uses
memcmp_with_bit_offsets now, and is bit not byte based.
(value_available_contents_eq): Move implementation into
value_available_contents_bits_eq, call to same.
(value_contents_copy_raw): Work on bits, not bytes.
(unpack_value_bits_as_long_1): Check availability in bits, not
bytes.
* value.h (value_bits_available): Declare new function.
(mark_value_bits_unavailable): Declare new function.
gdb/testsuite/ChangeLog
* gdb.trace/unavailable-dwarf-piece.c: New file.
* gdb.trace/unavailable-dwarf-piece.exp: New file.
2013-12-17 18:18:44 +01:00
|
|
|
dummy ();
|
|
|
|
asm (".global bar_end_lbl\nbar_end_lbl:");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
main (void)
|
|
|
|
{
|
|
|
|
struct s v = { 0, 1, 2 };
|
|
|
|
struct t w = { 5, 0, 1, 0, 1, 0, 1, 0, 1, 7 };
|
|
|
|
int ans;
|
|
|
|
|
|
|
|
ans = foo (v, v, v);
|
|
|
|
|
|
|
|
end ();
|
|
|
|
|
|
|
|
ans = bar (w, w, w);
|
|
|
|
|
|
|
|
end ();
|
|
|
|
|
|
|
|
return ans;
|
|
|
|
}
|