diff options
Diffstat (limited to 'gdb/dwarf2loc.c')
| -rw-r--r-- | gdb/dwarf2loc.c | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/gdb/dwarf2loc.c b/gdb/dwarf2loc.c index f90ee71a2b9..285081e472f 100644 --- a/gdb/dwarf2loc.c +++ b/gdb/dwarf2loc.c @@ -591,8 +591,20 @@ read_pieced_value (struct value *v) if (gdb_regnum != -1) { - get_frame_register_bytes (frame, gdb_regnum, reg_offset, - this_size, buffer); + int optim, unavail; + + if (!get_frame_register_bytes (frame, gdb_regnum, reg_offset, + this_size, buffer, + &optim, &unavail)) + { + /* Just so garbage doesn't ever shine through. */ + memset (buffer, 0, this_size); + + if (optim) + set_value_optimized_out (v, 1); + if (unavail) + mark_value_bytes_unavailable (v, offset, this_size); + } } else { @@ -776,8 +788,22 @@ write_pieced_value (struct value *to, struct value *from) { if (need_bitwise) { - get_frame_register_bytes (frame, gdb_regnum, reg_offset, - this_size, buffer); + int optim, unavail; + + if (!get_frame_register_bytes (frame, gdb_regnum, reg_offset, + this_size, buffer, + &optim, &unavail)) + { + if (optim) + error (_("Can't do read-modify-write to " + "update bitfield; containing word has been " + "optimized out")); + if (unavail) + throw_error (NOT_AVAILABLE_ERROR, + _("Can't do read-modify-write to update " + "bitfield; containing word " + "is unavailable")); + } copy_bitwise (buffer, dest_offset_bits, contents, source_offset_bits, this_size_bits, |