binutils-gdb.git
4 years agoAdd dwarf2_per_objfile parameter to dwarf2_read_addr_index
Simon Marchi [Wed, 27 May 2020 15:14:02 +0000 (11:14 -0400)]
Add dwarf2_per_objfile parameter to dwarf2_read_addr_index

Pass it all the way from the symbol batons.  This allows removing a
dwarf2_per_cu_data::dwarf2_per_objfile reference.

gdb/ChangeLog:

* dwarf2/read.h (dwarf2_read_addr_index): Add dwarf2_per_objfile
parameter.
* dwarf2/read.c (dwarf2_read_addr_index): Likewise.
* dwarf2/loc.c (decode_debug_loclists_addresses): Add
dwarf2_per_objfile parameter.
(decode_debug_loc_dwo_addresses): Likewise.
(dwarf2_find_location_expression): Update.
(class dwarf_evaluate_loc_desc) <get_addr_index>: Update.
(locexpr_describe_location_piece): Add dwarf2_per_objfile
parameter.
(disassemble_dwarf_expression): Add dwarf2_per_objfile
parameter.
(locexpr_describe_location_1): Likewise.
(locexpr_describe_location): Update.

Change-Id: I8414755e41a87c92f96e408524cc7aaccf086cda

4 years agoRemove dwarf2_per_cu_data::text_offset
Simon Marchi [Wed, 27 May 2020 15:14:01 +0000 (11:14 -0400)]
Remove dwarf2_per_cu_data::text_offset

This method simply returns the text offset of the objfile associated to
the dwarf2_per_cu_data object.  Since dwarf2_per_cu_data objects are
going to become objfile-independent, we can't keep this method.  This
patch removes it.

Existing callers need to figure out the in the context of which objfile
this is being used, and call text_offset on it.  Typically, this comes
from a symbol baton, where we store the corresponding
dwarf2_per_objfile.

gdb/ChangeLog:

* dwarf2/read.h (struct dwarf2_per_cu_data) <text_offset>:
Remove.
* dwarf2/read.c (dwarf2_per_cu_data::text_offset): Remove.
* dwarf2/loc.c (dwarf2_find_location_expression): Update.
(dwarf2_compile_property_to_c): Update.
(dwarf2_compile_expr_to_ax): Add dwarf2_per_objfile parameter,
use text offset from objfile.
(locexpr_tracepoint_var_ref): Update.
(locexpr_generate_c_location): Update.
(loclist_describe_location): Update.
(loclist_tracepoint_var_ref): Update.
* dwarf2/compile.h (compile_dwarf_bounds_to_c): Add
dwarf2_per_objfile parameter.
* dwarf2/loc2c.c (do_compile_dwarf_expr_to_c): Likewise,
use text offset from objfile.
(compile_dwarf_expr_to_c): Add dwarf2_per_objfile parameter.

Change-Id: I56b01ba294733362a3562426a96d48ae051a776f

4 years agoAdd dwarf2_per_objfile to dwarf_expr_context and dwarf2_frame_cache
Simon Marchi [Wed, 27 May 2020 15:14:01 +0000 (11:14 -0400)]
Add dwarf2_per_objfile to dwarf_expr_context and dwarf2_frame_cache

Evaluating DWARF expressions (such as location expressions) requires
knowing about the current objfile.  For example, it may call functions
like dwarf2_fetch_die_loc_sect_off, which currently obtain the
dwarf2_per_objfile object it needs from the dwarf2_per_cu_data object.
However, since we are going to remove this
dwarf2_per_cu_data::dwarf2_per_objfile link, these functions will need
to obtain the current dwarf2_per_objfile by parmeter.

If we go up the stack, we see that the DWARF expression contexts
(dwarf_expr_context and the classes that derive from it) need to store
the dwarf2_per_objfile, to be able to pass it to those functions that
will need it.

This patch adds a constructor to all these dwarf_expr_context variants,
accepting a dwarf2_per_objfile parameter.  This dwarf2_per_objfile
generally comes from a symbol baton created earlier.

For frame-related expressions, the dwarf2_per_objfile object must be
passed through the dwarf2_frame_cache object.  This lead to the
dwarf2_frame_find_fde function returning (by parameter) a
dwarf2_per_objfile object.  I then realized that this made the existing
"out_offset" parameter redundant.  This offset is
`objfile->text_section_offset ()`, so it can be recomputed from the
dwarf2_per_objfile object at any time.  I therefore opted to remove this
output parameter, as well as the offset field of dwarf2_frame_cache.

*Note*, there's one spot I'm particularly unsure about.  In
dwarf_evaluate_loc_desc::push_dwarf_reg_entry_value, we would save and
overwrite the offset value in the context, along with a bunch of other
state.  This is because we might be about to evaluate something in a
different CU that the current one.  If the two CUs are in the same
objfile, then the text_offset is the same, as it's a property of the
objfile.  However, if the two CUs are possibly in different objfiles,
then it means the text_offsets are different.  It would also mean we
would need to save and restore the dwarf2_per_objfile in the context.
Is that even possible?

gdb/ChangeLog:

* dwarf2/expr.h (struct dwarf_expr_context)
<dwarf_expr_context>: Add dwarf2_per_objfile parameter.
<offset>: Remove.
<per_objfile>: New member.
* dwarf2/expr.c (dwarf_expr_context::dwarf_expr_context): Add
dwarf2_per_objfile parameter.  Don't set offset, set
per_objfile.
(dwarf_expr_context::execute_stack_op): Use offset from objfile.
* dwarf2/frame.c (dwarf2_frame_find_fde): Return (by parameter)
a dwarf2_per_objfile object instead of an offset.
(class dwarf_expr_executor) <dwarf_expr_executor>: Add
constructor.
(execute_stack_op): Add dwarf2_per_objfile parameter, pass it
to dwarf2_expr_executor constructor.  Don't set offset.
(dwarf2_fetch_cfa_info): Update.
(struct dwarf2_frame_cache) <text_offset>: Remove.
<per_objfile>: New field.
(dwarf2_frame_cache): Update.
(dwarf2_frame_prev_register): Update.
* dwarf2/loc.c (class dwarf_evaluate_loc_desc)
<dwarf_evaluate_loc_desc>: Add constructor.
(dwarf2_evaluate_loc_desc_full): Update.
(dwarf2_locexpr_baton_eval): Update.
(class symbol_needs_eval_context) <symbol_needs_eval_context>:
Add constructor.
(dwarf2_loc_desc_get_symbol_read_needs): Update.

Change-Id: I14df060669cc36ad04759f1708c6d7b1fda77727

4 years agoMove int type methods out of dwarf2_per_cu_data
Simon Marchi [Wed, 27 May 2020 15:14:00 +0000 (11:14 -0400)]
Move int type methods out of dwarf2_per_cu_data

These methods rely on the current objfile to create types based on it.
Since dwarf2_per_cu_data is to become objfile-independent, these methods
need to mvoe.

int_type can be in dwarf2_per_objfile, as it only requires knowing about
the objfile.

addr_sized_int_type and addr_type also need to know about the DWARF
address type size, which is CU-specific.  The dwarf2_cu objects seems
like a good place for it, as it knows both about the current objfile and
the current CU.

gdb/ChangeLog:

* dwarf2/read.h (struct dwarf2_per_cu_data) <addr_type,
addr_sized_int_type>: Move to dwarf2_cu.
<int_type>: Move to dwarf2_per_objfile.
(struct dwarf2_per_objfile) <int_type>: Move here.
* dwarf2/read.c (struct dwarf2_cu) <addr_type,
addr_sized_int_type>: Move here.
(read_func_scope): Update.
(read_array_type): Update.
(read_tag_string_type): Update.
(attr_to_dynamic_prop): Update.
(dwarf2_per_cu_data::int_type): Rename to...
(dwarf2_per_objfile::int_type): ... this.
(dwarf2_per_cu_data::addr_sized_int_type): Rename to...
(dwarf2_cu::addr_sized_int_type): ... this.
(read_subrange_type): Update.
(dwarf2_per_cu_data::addr_type): Rename to...
(dwarf2_cu::addr_type): ... this.
(set_die_type): Update.

Change-Id: Ic4708ef99d43a8d99325ff91dee59b2eb706cb8f

4 years agoRemove reference to dwarf2_per_cu_data::dwarf2_per_objfile in queue_and_load_all_dwo_tus
Simon Marchi [Wed, 27 May 2020 15:13:59 +0000 (11:13 -0400)]
Remove reference to dwarf2_per_cu_data::dwarf2_per_objfile in queue_and_load_all_dwo_tus

In this context, we know that per_cu->cu will be set, as there is this
assertion:

    gdb_assert (per_cu->cu != NULL)

So in order to remove the dwarf2_per_cu_data::dwarf2_per_objfile
reference in queue_and_load_all_dwo_tus, we can go through per_cu->cu.
This adds a reference to dwarf2_per_cu_data::cu, but it will get removed
eventually, in a subsequent patch.

gdb/ChangeLog:

* dwarf2/read.c (queue_and_load_all_dwo_tus): Access per_objfile
data through per_cu->cu.

Change-Id: Id4662828ac3c5bc93fe221df3c9bd9a36a8427ad

4 years agoPass dwarf2_cu objects to dwo-related functions, instead of dwarf2_per_cu_data
Simon Marchi [Wed, 27 May 2020 15:13:59 +0000 (11:13 -0400)]
Pass dwarf2_cu objects to dwo-related functions, instead of dwarf2_per_cu_data

This allows removing references to the
dwarf2_per_cu_data::dwarf2_per_objfile field.

I am not too sure of the code flow here, but ultimately
open_and_init_dwo_file calls create_cus_hash_table, and passes it
per_cu->cu.  create_cus_hash_table requires a dwarf2_cu to pass to
cutu_reader, as the "parent_cu".

The dwarf2_per_cu_data::cu link is only set when in a certain context.
It's not easy to convince myself in which situations it's safe to use
it.  Instead, if a function is going to use a dwarf2_cu, I think it's
simpler if it takes that object directly.  If it needs access to the
corresponding dwarf2_per_cu_data object, then it can used the
dwarf2_cu::per_cu field, which we know is always set.

This patch adds some references to dwarf2_per_cu_data::cu in the
cutu_reader context.  In this context, we know this field will be set,
as it's cutu_reader that is responsible for instantiating the dwarf2_cu
and assigning the field.

gdb/ChangeLog:

* dwarf2/read.c (lookup_dwo_comp_unit): Change
dwarf2_per_cu_data parameter fo dwarf2_cu.
(lookup_dwo_type_unit): Likewise.
(read_cutu_die_from_dwo): Likewise.
(lookup_dwo_unit): Likewise.
(open_and_init_dwo_file): Likewise.
(lookup_dwo_cutu): Likewise.
(lookup_dwo_comp_unit): Likewise.
(lookup_dwo_type_unit): Likewise.
(cutu_reader::init_tu_and_read_dwo_dies): Update.
(cutu_reader::cutu_reader): Update.

Change-Id: I0406a715b0797963bde2bd86237f159cbece5839

4 years agoAdd dwarf2_per_objfile parameter to process_full_{comp,type}_unit
Simon Marchi [Wed, 27 May 2020 15:13:58 +0000 (11:13 -0400)]
Add dwarf2_per_objfile parameter to process_full_{comp,type}_unit

This allows removing the dwarf2_per_cu_data::dwarf2_per_objfile
references in them.

gdb/ChangeLog:

* dwarf2/read.c (process_full_comp_unit): Add dwarf2_per_objfile
parameter.
(process_full_type_unit): Likewise.
(process_queue): Update.

Change-Id: Ie68baa8cc4bf1f81cc67d4ad13a59881b4c3feb6

4 years agoAdd dwarf2_per_objfile parameter to recursively_compute_inclusions
Simon Marchi [Wed, 27 May 2020 15:13:58 +0000 (11:13 -0400)]
Add dwarf2_per_objfile parameter to recursively_compute_inclusions

This allows removing dwarf2_per_cu_data::dwarf2_per_objfile references
in recursively_compute_inclusions and compute_compunit_symtab_includes.

gdb/ChangeLog:

* dwarf2/read.c (recursively_compute_inclusions): Add
dwarf2_per_objfile parameter.
(compute_compunit_symtab_includes): Likewise.
(process_cu_includes): Update.

Change-Id: I1ee7f8dfc07b39763985e6764e8ce04dcc943ec5

4 years agoAdd dwarf2_per_objfile parameter to create_partial_symtab
Simon Marchi [Wed, 27 May 2020 15:13:57 +0000 (11:13 -0400)]
Add dwarf2_per_objfile parameter to create_partial_symtab

This allows removing a dwarf2_per_cu_data::dwarf2_per_objfile reference.

gdb/ChangeLog:

* dwarf2/read.c (create_partial_symtab): Add dwarf2_per_objfile
parameter.
(create_type_unit_group): Update.
(process_psymtab_comp_unit_reader): Update.
(build_type_psymtabs_reader): Update.

Change-Id: I72e3a8fce8022943ce6992fb623e05636cd0e3a5

4 years agoRemove dwarf2_per_cu_data::dwarf2_per_objfile reference in cutu_reader::keep
Simon Marchi [Wed, 27 May 2020 15:13:56 +0000 (11:13 -0400)]
Remove dwarf2_per_cu_data::dwarf2_per_objfile reference in cutu_reader::keep

Here, it should be safe to use dwarf2_per_cu_data->cu->per_objfile, as
we know that dwarf2_per_cu_data->cu will be set at this point.

Note that this adds a reference to dwarf2_per_cu_data::cu, which we'll
want to remove later, but the current focus is to remove references to
dwarf2_per_cu_data::dwarf2_per_objfile.  We'll deal with that in a
subsequent patch.

gdb/ChangeLog:

* dwarf2/read.c (cutu_reader::keep): Access dwarf2_per_objfile
object through m_this_cu->cu.

Change-Id: I8dc26d4db021e0b9e9306eb033965b2704bba87c

4 years agoMake queue_and_load_dwo_tu receive a dwarf2_cu
Simon Marchi [Wed, 27 May 2020 15:13:56 +0000 (11:13 -0400)]
Make queue_and_load_dwo_tu receive a dwarf2_cu

queue_and_load_dwo_tu, used as a callback for htab_traverse_noresize,
currently receives a dwarf2_per_cu_data as its `info` user data.  It
accesses the current dwarf2_cu object through the dwarf2_per_cu_data::cu field.
This field will be removed, because the dwarf2_per_cu_data will become
objfile-independent, while dwarf_cu will remain objfile-dependent.

To remove references to this field, change queue_and_load_dwo_tu so
that it expects to receive a pointer to the dwarf2_cu as its info
parameter.

A reference to dwarf2_per_cu_data::cu needs to be added, but it will get
removed in a subsequent patch, when this function gets re-worked.

I kept this as a separate patch, because since there's no strong typing
here, it's easy to miss something.

gdb/ChangeLog:

* dwarf2/read.c (queue_and_load_dwo_tu): Expect a dwarf2_cu as
the info parameter.
(queue_and_load_all_dwo_tus): Pass per_cu->cu.

Change-Id: I3db2a780f0e2157d52ce6939f478558ffe20abcf

4 years agoAdd dwarf2_per_objfile parameter to cutu_reader's constructors
Simon Marchi [Wed, 27 May 2020 15:13:55 +0000 (11:13 -0400)]
Add dwarf2_per_objfile parameter to cutu_reader's constructors

The cutu_reader type is used for reading the CU represented by the
passed dwarf2_per_cu_data object.  This reading is done in the context
of a given obfile, which is currently the one associated to the passed
dwarf2_per_cu_data object.  Since the dwarf2_per_cu_data type will
become objfile-independent, we will need to pass the objfile separately.

This patch therefore adds a dwarf2_per_objfile parameter to the
cutu_reader constructors, as well as to their callers, up until the
point where we can get the dwarf2_per_objfile object from somewhere
else.  In the end, this allows removing the reference to
dwarf2_per_cu_data::dwarf2_per_objfile in cutu_reader::cutu_reader.

A few dwarf2_per_cu_data::dwarf2_per_objfile references are added (e.g.
in dwarf2_fetch_die_type_sect_off).  This is temporary, this will be
removed once these functions will get re-worked in subsequent patches.

gdb/ChangeLog:

* dwarf2/read.c (class cutu_reader) <cutu_reader>: Add
per_objfile parameter.
(load_full_type_unit): Add per_objfile parameter.
(read_signatured_type): Likewise.
(load_full_comp_unit): Likewise.
(load_cu): Likewise.
(dw2_do_instantiate_symtab): Likewise.
(dw2_get_file_names): Likewise.
(dw2_map_symtabs_matching_filename): Update.
(dw_expand_symtabs_matching_file_matcher): Update.
(dw2_map_symbol_filenames): Update.
(process_psymtab_comp_unit): Add per_objfile parameter.
(build_type_psymtabs_1): Update.
(process_skeletonless_type_unit): Update.
(dwarf2_build_psymtabs_hard): Update.
(load_partial_comp_unit): Add per_objfile parameter.
(scan_partial_symbols): Update.
(load_full_comp_unit): Add per_objfile parameter.
(process_imported_unit_die): Update.
(create_cus_hash_table): Update.
(find_partial_die): Update.
(dwarf2_read_addr_index): Update.
(follow_die_offset): Update.
(dwarf2_fetch_die_loc_sect_off): Update.
(dwarf2_fetch_constant_bytes): Update.
(dwarf2_fetch_die_type_sect_off): Update.
(follow_die_sig_1): Update.
(load_full_type_unit): Add per_objfile parameter.
(read_signatured_type): Likewise.

Change-Id: Ibd7bbc443df8b9b8b6f96ff18e93a60ee721b85f

4 years agoUse bfd_get_filename instead of objfile_name in lookup_dwo_unit
Simon Marchi [Wed, 27 May 2020 15:13:55 +0000 (11:13 -0400)]
Use bfd_get_filename instead of objfile_name in lookup_dwo_unit

There should be no functional difference, as objfile_name defers to
bfd_get_filename if objfile::obfd is non-NULL, which should be the case
here.  This allows to remove a reference to
dwarf2_per_cu_data::dwarf2_per_objfile.

gdb/ChangeLog:

* dwarf2/read.c (lookup_dwo_unit): Use bfd_get_filename instead
of objfile_name.

Change-Id: I1e1c1870820aec23701edc9c3994612da5781c23

4 years agoMake dwarf2_get_dwz_file take a dwarf2_per_bfd
Simon Marchi [Wed, 27 May 2020 15:13:54 +0000 (11:13 -0400)]
Make dwarf2_get_dwz_file take a dwarf2_per_bfd

This allows removing a per_bfd->dwarf2_per_objfile reference in
get_abbrev_section_for_cu.

This requires saving the bfd in dwarf2_per_bfd.  The constructor of
dwarf2_per_bfd already accepts the bfd, so it's just a matter of saving
it in a field.

I replaced uses of objfile_name with bfd_get_filename, which should be
equivalent in this case.

gdb/ChangeLog:

* dwarf2/read.h (struct dwarf2_per_bfd) <obfd>: New member.
(dwarf2_get_dwz_file): Replace parameter with dwarf2_per_bfd.
* dwarf2/read.c (dwarf2_per_bfd::dwarf2_per_bfd): Assign obfd
field.
(dwarf2_get_dwz_file): Replace parameter with dwarf2_per_bfd.
(create_cus_from_index): Update.
(dwarf2_read_gdb_index): Update.
(create_cus_from_debug_names): Update.
(dwarf2_read_debug_names): Update.
(get_abbrev_section_for_cu): Update.
(create_all_comp_units): Update.
(read_attribute_value): Update.
(get_debug_line_section): Update.
* dwarf2/index-cache.c (index_cache::store): Update.
* dwarf2/index-write.c (save_gdb_index_command): Update.
* dwarf2/macro.c (dwarf_decode_macro_bytes): Update.

Change-Id: Ifb23f55dda93c499aae57b6a9aff9c6ff9d2f45f

4 years agoAdd dwarf2_per_bfd field to dwarf2_per_cu_data
Simon Marchi [Wed, 27 May 2020 15:13:54 +0000 (11:13 -0400)]
Add dwarf2_per_bfd field to dwarf2_per_cu_data

Some code using dwarf2_per_cu_data objects accesses the corresponding
dwarf2_per_bfd using the following pattern:

    per_cu->dwarf2_per_objfile->per_bfd

Since dwarf2_per_cu_data objects are going to become
objfile-independent, the dwarf2_per_objfile link must go.  To replace
it, add a dwarf2_per_cu_data->per_bfd link.  It makes sense to have it
there because the dwarf2_per_cu_data objects belong to the
dwarf2_per_bfd, so this is essentially just a backlink to their owner.

gdb/ChangeLog:

* dwarf2/read.h (struct dwarf2_per_cu_data) <per_bfd>: New
member.
* dwarf2/read.c (dwarf2_per_bfd::allocate_per_cu): Initialize
dwarf2_per_cu_data::per_bfd.
(dwarf2_per_bfd::allocate_signatured_type): Likewise.
(create_type_unit_group): Likewise.
(queue_comp_unit): Remove reference to
per_cu->dwarf2_per_objfile.
(maybe_queue_comp_unit): Likewise.
(fill_in_sig_entry_from_dwo_entry): Assign new field.
(create_cus_hash_table): Assign new field.

Change-Id: I4ba0a393e64a14489ef061261a3dede1509d055b

4 years agoRemove dwarf2_cu->per_cu->dwarf2_per_objfile references
Simon Marchi [Wed, 27 May 2020 15:13:53 +0000 (11:13 -0400)]
Remove dwarf2_cu->per_cu->dwarf2_per_objfile references

Change spots that access the dwarf2_per_objfile object through this
pattern:

  dwarf2_cu->per_cu->dwarf2_per_objfile

to

  dwarf2_cu->per_objfile

This allows removing many references to
dwarf2_per_cu_data::dwarf2_per_objfile.

Again, I hope the following ChangeLog entry will be fine.  I'd rather not
list all the affected functions, as it would be time-consuming and a bit
pointless.

gdb/ChangeLog:

* dwarf2/read.c: Replace
dwarf2_cu->per_cu->dwarf2_per_objfile references with
dwarf2_cu->per_objfile throughout.

Change-Id: I00f44e88295f70ae805a4b18e8144ca92154612e

4 years agoRemove reference to dwarf2_per_cu_data::dwarf2_per_objfile in dw2_do_instantiate_symtab
Simon Marchi [Wed, 27 May 2020 15:13:52 +0000 (11:13 -0400)]
Remove reference to dwarf2_per_cu_data::dwarf2_per_objfile in dw2_do_instantiate_symtab

This patch begins by removing the per_cu->dwarf2_per_objfile reference
in dw2_do_instantiate_symtab, instead accepting a dwarf2_per_objfile
object as a parameter.  It then fixes the fallouts.  In this context,
the dwarf2_per_objfile is generally derived from an objfile passed to a
quick_symbol_functions callback.

gdb/ChangeLog:

* dwarf2/read.c (dw2_do_instantiate_symtab): Add per_objfile
parameter, don't use per_cu->dwarf2_per_objfile.
(dw2_instantiate_symtab): Likewise.
(dw2_find_last_source_symtab): Update.
(dw2_map_expand_apply): Update.
(dw2_lookup_symbol): Update.
(dw2_expand_symtabs_for_function): Update.
(dw2_expand_all_symtabs): Update.
(dw2_expand_symtabs_with_fullname): Update.
(dw2_expand_symtabs_matching_one): Add per_objfile parameter,
don't use per_cu->dwarf2_per_objfile.
(dw2_expand_marked_cus): Update.
(dw2_find_pc_sect_compunit_symtab): Update.
(dw2_debug_names_lookup_symbol): Update.
(dw2_debug_names_expand_symtabs_for_function): Update.
(dw2_debug_names_map_matching_symbols): Update.
(dwarf2_psymtab::expand_psymtab): Update.

Change-Id: I248300822a09bae8470b65a7122d04fb9cb2b5bc

4 years agoAdd dwarf2_per_objfile field to dwarf2_cu
Simon Marchi [Wed, 27 May 2020 15:13:52 +0000 (11:13 -0400)]
Add dwarf2_per_objfile field to dwarf2_cu

Subsequent patches will make dwarf2_per_cu_data objfile-independent.
This means that the dwarf2_per_cu_data::dwarf2_per_objfile field must
go.

The code using a dwarf2_cu structure currently accesses the current
dwarf2_per_objfile object through dwarf2_cu->per_cu->dwarf2_per_objfile.
Since it's ok for the dwarf2_cu to know about the current objfile (a
dwarf2_cu is always used in the context of a particular objfile), add a
dwarf2_per_objfile field to dwarf2_cu.  Upcoming patches will gradually
remove uses of dwarf2_per_cu_data::dwarf2_per_objfile in favor of
dwarf2_cu::dwarf2_per_objfile, until the former can be removed.

gdb/ChangeLog:

* dwarf2/read.c (struct dwarf2_cu) <dwarf2_cu>: Add parameter.
<per_objfile>: New member.
(class cutu_reader) <init_tu_and_read_dwo_dies>: Add parameter.
(cutu_reader::init_tu_and_read_dwo_dies): Add parameter, update
call to dwarf2_cu.
(cutu_reader::cutu_reader): Update.
(dwarf2_cu::dwarf2_cu): Add parameter, initialize per_objfile.

Change-Id: I8fd0da7371f65baea1ea7787aad08e10453bc565

4 years agoMove die_type_hash to dwarf2_per_objfile
Simon Marchi [Wed, 27 May 2020 15:13:51 +0000 (11:13 -0400)]
Move die_type_hash to dwarf2_per_objfile

The die_type_hash field can't be shared between multiple obfiles, as it
holds `struct type` objects, which are objfile-specific.  Move it from
dwarf2_per_bfd to dwarf2_per_objfile and update all references.

gdb/ChangeLog:

* dwarf2/read.h (struct dwarf2_per_bfd) <die_type_hash>: Move to
struct dwarf2_per_objfile.
(struct dwarf2_per_objfile) <die_type_hash>: Move from struct
dwarf2_per_bfd.
* dwarf2/read.c (set_die_type): Update.
(get_die_type_at_offset): Update.

Change-Id: I3589777ed3579bcabafd2ba859d27babe4502bfb

4 years agoRemove symtab links from dwarf2_psymtab and dwarf2_per_cu_quick_data
Simon Marchi [Wed, 27 May 2020 15:15:47 +0000 (11:15 -0400)]
Remove symtab links from dwarf2_psymtab and dwarf2_per_cu_quick_data

The dwarf2_psymtab and dwarf2_per_cu_quick_data types contain a pointer
to a compunit_symtab, which is a pointer to the corresponding full
symtab.  The dwarf2_psymtab and dwarf2_per_cu_quick_data objects are
going to become objfile-independent, and possibly shared by multiple
objfiles, whereas compunit_symtab will stay objfile-dependent.  This
backlink to the compunit_symtab must therefore be removed.

This patch replaces them with a vector in the dwarf2_per_objfile type,
that serves as a mapping from dwarf2_per_cu_data objects to
compunit_symtab objects, for this particular objfile.  The vector is
indexed using the index assigned to the dwarf2_per_cu_data at its
creation.

I removed the get_compunit_symtab, as it appears to bring not much value
over calling dwarf2_per_objfile::get_symtab directly.

gdb/ChangeLog:

YYYY-MM-DD  Tom Tromey  <tom@tromey.com>
YYYY-MM-DD  Simon Marchi  <simon.marchi@efficios.com>

* dwarf2/read.h (struct dwarf2_per_bfd) <num_psymtabs>: New
method.
(struct dwarf2_per_objfile) <resize_symtabs, symtab_set_p,
get_symtab, set_symtab>: New methods.
<m_symtabs>: New field.
(struct dwarf2_psymtab): Derive from partial_symtab.
<readin_p, get_compunit_symtab>: Declare methods.
* dwarf2/read.c (dwarf2_per_objfile::symtab_set_p,
dwarf2_per_objfile::get_symtab, dwarf2_per_objfile::set_symtab):
New methods.
(struct dwarf2_per_cu_quick_data) <compunit_symtab>: Remove.
(dw2_do_instantiate_symtab, dw2_instantiate_symtab)
(dw2_map_expand_apply, dw2_map_symtabs_matching_filename)
(dw2_symtab_iter_next, dw2_print_stats)
(dw2_expand_symtabs_with_fullname)
(dw2_expand_symtabs_matching_one)
(dw_expand_symtabs_matching_file_matcher)
(dw2_find_pc_sect_compunit_symtab, dw2_map_symbol_filenames)
(dw2_debug_names_iterator::next)
(dw2_debug_names_map_matching_symbols)
(fill_in_sig_entry_from_dwo_entry, dwarf2_psymtab::read_symtab)
(process_queue, dwarf2_psymtab::expand_psymtab): Update.
(dwarf2_psymtab::readin_p, dwarf2_psymtab::get_compunit_symtab):
New methods.
(get_compunit_symtab, process_full_comp_unit)
(process_full_type_unit): Update.
(dwarf2_build_psymtabs, dwarf2_initialize_objfile, add_type_unit): Call

Change-Id: Iec53d96e0b70a57d8b68408febdac3c6c3d4854b

4 years agoSplit dwarf2_per_objfile into dwarf2_per_objfile and dwarf2_per_bfd
Simon Marchi [Wed, 27 May 2020 15:13:50 +0000 (11:13 -0400)]
Split dwarf2_per_objfile into dwarf2_per_objfile and dwarf2_per_bfd

This is the first step of splitting dwarf2_per_objfile in two, one
structure for objfile-independent data (dwarf2_per_bfd) and one for
objfile-dependent data (dwarf2_per_objfile).

The existing dwarf2_per_objfile is renamed dwarf2_per_bfd, and a new
dwarf2_per_objfile type is introduced, which sits "in between" the
objfile and dwarf2_per_bfd.

So where we had this before:

  objfile -> dwarf2_per_objfile (*)

we now have this:

  objfile -> dwarf2_per_objfile -> dwarf2_per_bfd (*)

(*) Note that the dwarf2_per_objfile in the former corresponds to
the dwarf2_per_bfd in the latter.

I've done the minimal amount of changes in this patch: following patches
will incrementally move things that are not actually shareable between
objfiles from dwarf2_per_bfd to dwarf2_per_objfile.

Most references to dwarf2_per_objfile objects are changed to
dwarf2_per_objfile->per_bfd.  To avoid many of these replacements, which
would have to be reverted later anyway, I've moved right away the
objfile backlink to the new dwarf2_per_objfile structure in this patch.
I've also moved the read_line_string method, since it references the
objfile backlink, and it's actually not difficult to move.

Once the moves are completed, multiple dwarf2_per_objfile sharing the
same BFD will point to the same single instance of dwarf2_per_bfd (as
long as they don't require relocation).

dwarf2_has_info, where we create these objects, is updated to the new
architecture.

I've had to change the get_gdb_index_contents_ftype typedef and related
functions.  The parameter type was changed from dwarf2_per_objfile to
dwarf2_per_bfd, otherwise the template wouldn't work.

Please excuse the terse ChangeLog entry, I have not listed all the
functions where dwarf2_per_objfile has been changed to
dwarf2_per_objfile->per_bfd.  It would take a considerable amount of
time and would not really be useful in the end.

gdb/ChangeLog:

* dwarf2/read.h (dwarf2_per_objfile): Rename to dwarf2_per_bfd,
then introduce a new dwarf2_per_objfile type.
<read_line_string>: Move to the new dwarf2_per_objfile type.
<objfile>: Likewise.
(dwarf2_per_bfd): Rename dwarf2_per_objfile to this.
* dwarf2/read.c: Replace references to dwarf2_per_objfile with
dwarf2_per_objfile->per_bfd.
(dwarf2_per_objfile::dwarf2_per_objfile): Rename to...
(dwarf2_per_bfd::dwarf2_per_bfd): ... this.
(dwarf2_per_objfile::free_cached_comp_units): Rename to...
(dwarf2_per_bfd::free_cached_comp_units): ... this.
(dwarf2_has_info): Allocate dwarf2_per_bfd.
(dwarf2_per_objfile::locate_sections): Rename to...
(dwarf2_per_bfd::locate_sections): ... this.
(dwarf2_per_objfile::get_cutu): Rename to...
(dwarf2_per_bfd::get_cutu): ... this.
(dwarf2_per_objfile::get_cu): Rename to...
(dwarf2_per_bfd::get_cu): ... this.
(dwarf2_per_objfile::get_tu): Rename to...
(dwarf2_per_bfd::get_tu): ... this.
(dwarf2_per_objfile::allocate_per_cu): Rename to...
(dwarf2_per_bfd::allocate_per_cu): ... this.
(dwarf2_per_objfile::allocate_signatured_type): Rename to...
(dwarf2_per_bfd::allocate_signatured_type): ... this.
(get_gdb_index_contents_ftype): Change parameter from
dwarf2_per_objfile to dwarf2_per_bfd.
* dwarf2/macro.c, dwarf2/index-write.c: Replace references to
dwarf2_per_objfile with dwarf2_per_objfile->per_bfd.

Change-Id: I7de7b5d1ce7494aa73bfcf15f719d3c5c46e138c

4 years agoAdd dwarf2_per_objfile member to DWARF batons
Tom Tromey [Wed, 27 May 2020 15:13:50 +0000 (11:13 -0400)]
Add dwarf2_per_objfile member to DWARF batons

Various DWARF callbacks expect to be able to fetch the objfile and / or
dwarf2_per_objfile from the DWARF CU object.  However, this won't be
possible once sharing is implemented.

Because these objects are related to full symbols (e.g., they are used
to implement location expressions), they can simply store the
dwarf2_per_objfile they need.

This patch adds a per_objfile member to the various "baton" structures
and arranges to set this value when constructing the baton.

gdb/ChangeLog:

YYYY-MM-DD  Tom Tromey  <tom@tromey.com>
YYYY-MM-DD  Simon Marchi  <simon.marchi@efficios.com>

* dwarf2/loc.c (struct piece_closure) <per_objfile>: New member.
(allocate_piece_closure): Set "per_objfile" member.
(dwarf2_find_location_expression, dwarf2_locexpr_baton_eval)
(locexpr_describe_location, loclist_describe_location): Use new
member.
* dwarf2/read.c (read_call_site_scope)
(mark_common_block_symbol_computed, attr_to_dynamic_prop)
(dwarf2_const_value_attr, dwarf2_fetch_die_loc_sect_off)
(fill_in_loclist_baton, dwarf2_symbol_mark_computed,
handle_data_member_location): Set per_objfile member.
* dwarf2/loc.h (struct dwarf2_locexpr_baton) <per_objfile>: New
member.
(struct dwarf2_loclist_baton) <per_objfile>: New member.

Change-Id: If3aaa6a0f544be86710157c3adb68fde24d80037

4 years agoAdd dwarf2_per_cu_data::index
Tom Tromey [Wed, 27 May 2020 15:13:49 +0000 (11:13 -0400)]
Add dwarf2_per_cu_data::index

Currently, a dwarf2_per_cu_data can hold a link to the corresponding
expanded compunit_symtab.  However, the dwarf2_per_cu_data objects are
shared across objfiles, a simple pointer won't work: each objfile
sharing the dwarf2_per_cu_data instance will have a corresponding
compunit_symtab.

Instead, this link will be stored in the dwarf2_per_objfile object
(which will contain the objfile-specific data).  To enable this, we add
an index to each dwarf2_per_cu_data and signatured_type.  The data
structure in the dwarf2_per_objfile will use this new index to map a
dwarf2_per_cu_data to its corresponding compunit_symtab, for this
objfile.

gdb/ChangeLog:

* dwarf2/read.h (struct dwarf2_per_objfile) <allocate_per_cu,
allocate_signatured_type>: Declare new methods.
<m_num_psymtabs>: New member.
(struct dwarf2_per_cu_data) <index>: New member.
* dwarf2/read.c (dwarf2_per_objfile::allocate_per_cu)
(dwarf2_per_objfile::allocate_signatured_type): New methods.
(create_cu_from_index_list): Use allocate_per_cu.
(create_signatured_type_table_from_index)
(create_signatured_type_table_from_debug_names)
(create_debug_type_hash_table, add_type_unit)
(read_comp_units_from_section): Use allocate_signatured_type.

Change-Id: I7733479a38ce82a5015cb184c8acce5f8bbf2e69

4 years agoAdd "objfile" parameter to two partial_symtab methods
Tom Tromey [Wed, 27 May 2020 15:13:48 +0000 (11:13 -0400)]
Add "objfile" parameter to two partial_symtab methods

This series will cause partial symtabs to be shared across objfiles.
However, full symtabs and symbols will still be objfile-dependent, so
will be expanded separately for each objfile.  So, a debug info reader
will need to know which objfile to consult when expanding a partial
symtab.

This patch adds an objfile parameter to the two relevant methods of
partial_symtab.  Current implementations simply ignore them.

gdb/ChangeLog:

* psymtab.c (partial_map_expand_apply)
(psym_find_pc_sect_compunit_symtab, psym_lookup_symbol)
(psym_lookup_global_symbol_language)
(psymtab_to_symtab, psym_find_last_source_symtab, dump_psymtab)
(psym_print_stats, psym_expand_symtabs_for_function)
(psym_map_symbol_filenames, psym_map_matching_symbols)
(psym_expand_symtabs_matching)
(partial_symtab::read_dependencies, maintenance_info_psymtabs)
(maintenance_check_psymtabs): Update.
* psympriv.h (struct partial_symtab) <readin_p,
get_compunit_symtab>: Add objfile parameter.
(struct standard_psymtab) <readin_p, get_compunit_symtab>:
Likewise.
* dwarf2/read.c (struct dwarf2_include_psymtab) <readin_p,
get_compunit_symtab>: Likewise.
(dwarf2_psymtab::expand_psymtab): Pass objfile argument.

Change-Id: I3f0b26787c3e78f7fb78b9fc011d91fb8690f3a0

4 years agoIntroduce dwarf2_per_objfile::obstack
Tom Tromey [Wed, 27 May 2020 15:13:48 +0000 (11:13 -0400)]
Introduce dwarf2_per_objfile::obstack

Currently much of the DWARF-related data is stored on the objfile
obstack.  This prevents sharing this data across objfiles, so this patch
adds a new obstack to dwarf2_per_objfile.  Note that the
dwarf2_per_objfile type is going to become "dwarf2_per_bfd" in a
subsequent patch, which is indeed going to be shared between objfiles.

One way to check whether this is correct is to look at the remaining
uses of objfile_obstack in the DWARF code and note that they all
appear in the "full CU" code paths.

The converse -- storing per-objfile data on the shared obstack -- is
not good, but it is just a memory leak, not a potential
use-after-free.  Double-checking this would also be useful, though.

gdb/ChangeLog:

* dwarf2/read.h (struct dwarf2_per_objfile) <obstack>: New
member.
* dwarf2/read.c (delete_file_name_entry): Fix comment.
(create_cu_from_index_list)
(create_signatured_type_table_from_index)
(create_signatured_type_table_from_debug_names)
(dw2_get_file_names_reader, dwarf2_initialize_objfile)
(dwarf2_create_include_psymtab)
(create_debug_type_hash_table, add_type_unit)
(create_type_unit_group, read_comp_units_from_section)
(dwarf2_compute_name, create_cus_hash_table)
(create_dwp_hash_table, create_dwo_unit_in_dwp_v1)
(create_dwo_unit_in_dwp_v2, open_and_init_dwp_file): Use new
obstack.
(dw2_get_real_path): Likewise.  Change argument to
dwarf2_per_objfile.

Change-Id: Icdec7be7c4d9f33d1dce4f807284f3077f7d3f03

4 years agoFix PR 26000, logical bitwise error / prologue analyzer
Luis Machado [Sat, 16 May 2020 02:06:52 +0000 (23:06 -0300)]
Fix PR 26000, logical bitwise error / prologue analyzer

This fixes an instruction mask typo. We should be matching only
ldrd (immediate) and not any other of its variants. As is, it never matches
anything.

With the patch, the instruction mask also allows matching of ldrd (literal),
but the check for SP discards this particular instruction pattern, as it has
a hardcoded PC register.

gdb/ChangeLog:

2020-05-27  Luis Machado  <luis.machado@linaro.org>

PR tdep/26000
* arm-tdep.c (thumb_analyze_prologue): Fix instruction matching
for ldrd (immediate).

4 years agoFix some duplicate test names
Luis Machado [Mon, 25 May 2020 16:25:50 +0000 (13:25 -0300)]
Fix some duplicate test names

While doing a testsuite run on aarch64-linux, I noticed a bunch of duplicated
test name results. It annoyed me a little, so I decided to go ahead and fix the
worst offenders.

The following patch brings the duplicate test names down from 461 to 137.

The remaining ones are mostly scattered across the testsuite, with 1 to 3
duplicates per testcase. We can fix those as we go.

gdb/testsuite/ChangeLog:

2020-05-27  Luis Machado  <luis.machado@linaro.org>

* gdb.arch/aarch64-sighandler-regs.exp: Fix duplicated test names.
* gdb.arch/aarch64-tagged-pointer.exp: Likewise.
* gdb.arch/arm-disassembler-options.exp: Likewise.
* gdb.arch/arm-disp-step.exp: Likewise.
* gdb.arch/thumb-prologue.exp: Likewise.
* gdb.base/async.exp: Likewise.
* gdb.base/auxv.exp: Likewise.
* gdb.base/complex-parts.exp: Likewise.
* gdb.base/ena-dis-br.exp: Likewise.
* gdb.base/foll-exec.exp: Likewise.
* gdb.base/permissions.exp: Likewise.
* gdb.base/relocate.exp: Likewise.
* gdb.base/return2.exp: Likewise.
* gdb.base/sigbpt.exp: Likewise.
* gdb.base/siginfo-obj.exp: Likewise.
* gdb.cp/converts.exp: Likewise.
* gdb.cp/exceptprint.exp: Likewise.
* gdb.cp/inherit.exp: Likewise.
* gdb.cp/nsnoimports.exp: Likewise.
* gdb.cp/virtbase2.exp: Likewise.
* gdb.mi/mi-var-cmd.exp: Likewise.
* gdb.mi/var-cmd.c: Likewise.

4 years agold: Add --warn-textrel and obsolete --warn-shared-textrel
H.J. Lu [Wed, 27 May 2020 11:53:54 +0000 (04:53 -0700)]
ld: Add --warn-textrel and obsolete --warn-shared-textrel

--warn-shared-textrel and -z text apply to both shared object and PIE.
Add --warn-textrel and obsolete --warn-shared-textrel.  Consolidate
--warn-textrel and -z text/notext/textoff implementation.

bfd/

PR ld/22909
* elflink.c (bfd_elf_final_link): Use bfd_link_textrel_check.
Check bfd_link_dll when issue a DT_TEXTREL warning.
* elfxx-x86.c (maybe_set_textrel): Likewise.
(_bfd_x86_elf_size_dynamic_sections): Likewise.

include/

PR ld/22909
* bfdlink.h (textrel_check_method): New enum.
(bfd_link_textrel_check): New.
(bfd_link_info): Replace warn_shared_textrel and error_textrel
with textrel_check.

ld/

PR ld/22909
* NEWS: Mention --warn-textrel.
* ld.texi: Update -z text/notext/textoff.  Add --warn-textrel.
Remove --warn-shared-textrel.
* ldlex.h (option_values): Rename OPTION_WARN_SHARED_TEXTREL to
OPTION_WARN_TEXTREL.
* lexsup.c (ld_options): Add --warn-textrel.  Obsolete
--warn-shared-textrel.
(parse_args): Updated.
(elf_shlib_list_options): Check link_info.textrel_check.
* emultempl/elf.em: Updated.
* testsuite/ld-elf/pr19539.d: Replace -z notext with
--warn-textrel.  Expect a warning.
* testsuite/ld-i386/warn1.d: Update expected warning.

4 years agoFix extraction of signed constants in nios2 disassembler (again).
Sandra Loosemore [Wed, 27 May 2020 06:23:03 +0000 (23:23 -0700)]
Fix extraction of signed constants in nios2 disassembler (again).

In commit 6031ac352c05c5c9f44e24fa1c5a8222a7a7d02d I added some casts
to explicitly do conversions from unsigned to signed as 32-bit
quantities to address some bugs with different sizes of long and
bfd_signed_vma.  Those casts were removed in the rewrite of the
sign-extension logic in commit 1d61b032265e69317f42e8019e072506f11890c5,
reintroducing the same bugs.  This patch restores the casts.

2020-05-26  Sandra Loosemore  <sandra@codesourcery.com>

opcodes/
* nios2-dis.c (nios2_print_insn_arg): Add explicit casts to
extractions of signed fields.

4 years agoAutomatic date update in version.in
GDB Administrator [Wed, 27 May 2020 00:00:17 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agold: Skip some x86 ifunc tests for lynxos and nto
H.J. Lu [Tue, 26 May 2020 21:25:19 +0000 (14:25 -0700)]
ld: Skip some x86 ifunc tests for lynxos and nto

On lynxos and nto:

regexp_diff match failure
regexp "^Relocation section '.rel(a|).plt' at offset 0x[0-9a-f]+ contains 1 entry:$"
line   "Relocation section '.rel.dyn' at offset 0x74 contains 1 entry:"
FAIL: ld-ifunc/ifunc-23a-x86

* testsuite/ld-ifunc/ifunc-23a-x86.d: Skip *-*-lynxos *-*-nto*.
* testsuite/ld-ifunc/ifunc-24a-x86.d: Likewise.
* testsuite/ld-ifunc/ifunc-25a-x86.d: Likewise.

4 years agogas: Adjust x86 tests for PECOFF
H.J. Lu [Tue, 26 May 2020 21:17:09 +0000 (14:17 -0700)]
gas: Adjust x86 tests for PECOFF

* testsuite/gas/i386/align-branch-9.d: Updated for PECOFF.
* testsuite/gas/i386/inval-avx512f.s: Add .p2align for PECOFF.
* testsuite/gas/i386/inval-avx512f.l: Updated.

4 years agoEnsure class_tui is listed in the output of "help" giving the list of classes.
Philippe Waroquiers [Sat, 23 May 2020 13:11:52 +0000 (15:11 +0200)]
Ensure class_tui is listed in the output of "help" giving the list of classes.

Before this change, "help" was not showing the TUI class.
With this change:
  (gdb) help
  ...
  support -- Support facilities.
  text-user-interface -- TUI is the GDB text based interface.
  tracepoints -- Tracing of program execution without stopping the program.
  ...
  (gdb) help text-user-interface
  TUI is the GDB text based interface.
  In TUI mode, GDB can display several text windows showing
  the source file, the processor registers, the program disassembly, ...

  List of commands:

  + -- Scroll window forward.
  ...

Note that we cannot use "tui" for the fake class command name, as "tui"
is a command.

gdb/ChangeLog

2020-05-26  Philippe Waroquiers  <philippe.waroquiers@skynet.be>

* command.h: Add comment giving the name of class_tui.
* cli/cli-cmds.c (_initialize_cli_cmds): If TUI defined,
create the fake command for the help for class_tui.

4 years agoHandle indexing Ada arrays with enum indices
Tom Tromey [Tue, 26 May 2020 20:11:08 +0000 (14:11 -0600)]
Handle indexing Ada arrays with enum indices

In Ada, like C, an enum can assign values to the constants.  However,
unlike C (or any other language supported by gdb), the enum type can
also be used as the range of an array.

In this case, the user's code references the enum constants, but the
compiler translates these to the position of the constant in the enum.
So for example one might write:

   type Enum_With_Gaps is
     (
      LIT0,
      LIT1,
      LIT2,
      LIT3,
      LIT4
     );

   for Enum_With_Gaps use
     (
      LIT0 => 3,
      LIT1 => 5,
      LIT2 => 8,
      LIT3 => 13,
      LIT4 => 21
     );

Then index an array like "array(LIT3)" -- but this will be the 4th
element in an array of 5 elements, not the 13th element in an array of
19 (assuming I did the math right) elements.

gdb supports this to some degree, with the only missing piece being
indexing into such an array.  This patch implements this missing
feature, and also fixes an existing bug, which is that in some
situations I believe gdb would mis-compute the resulting array's
length.

The approach taken here is to try to integrate this feature into the
core of gdb.  My view is that much of the Ada support should be better
integrated with gdb, rather than being "on the side".  This, I think,
would help avoid code duplication at least.  So, I try to take steps
toward this goal when possible.

Because other languages generally don't allow the user to specify the
index type of an array, I simply made the core of gdb unconditionally
apply discrete_position when computing the range of such an array.
This is a no-op for ordinary types, but applies the enum
value-to-position transformation for TYPE_CODE_ENUM.

gdb/ChangeLog
2020-05-26  Tom Tromey  <tromey@adacore.com>

* ada-lang.c (ada_print_array_index): Change type.  Call val_atr.
(ada_value_ptr_subscript): Don't call pos_atr on the lower bound.
(val_atr): New function.
(value_val_atr): Use it.
* ada-valprint.c (print_optional_low_bound): Change low bound
handling for enums.
(val_print_packed_array_elements): Don't call discrete_position.
* gdbtypes.c (get_discrete_bounds) <TYPE_CODE_RANGE>: Call
discrete_position for enum types.
* language.c (default_print_array_index): Change type.
* language.h (struct language_defn) <la_print_array_index>: Add
index_type parameter, change type of index_value.
(LA_PRINT_ARRAY_INDEX): Add index_type parameter.
(default_print_array_index): Update.
* valprint.c (maybe_print_array_index): Don't call
value_from_longest.  Update.
(value_print_array_elements): Don't call discrete_position.

gdb/testsuite/ChangeLog
2020-05-26  Tom Tromey  <tromey@adacore.com>

* gdb.ada/arr_acc_idx_w_gap.exp: Add tests.

4 years agoFix bugs in 'val and 'pos with range types
Tom Tromey [Tue, 26 May 2020 20:11:08 +0000 (14:11 -0600)]
Fix bugs in 'val and 'pos with range types

In Ada, the 'val and 'pos attributes can be used to map from an
enumeration constant to its position in the enum and vice versa.
These operators did not work properly when the type in question was a
subrange of an enum type with "holes".

gdb/ChangeLog
2020-05-26  Tom Tromey  <tromey@adacore.com>

* ada-lang.c (value_val_atr): Handle TYPE_CODE_RANGE.
* gdbtypes.c (discrete_position): Handle TYPE_CODE_RANGE.

gdb/testsuite/ChangeLog
2020-05-26  Tom Tromey  <tromey@adacore.com>

* gdb.ada/arr_acc_idx_w_gap.exp: Add enum subrange tests.
* gdb.ada/arr_acc_idx_w_gap/enum_with_gap.ads (Enum_Subrange): New
type.
* gdb.ada/arr_acc_idx_w_gap/enum_with_gap_main.adb (V): New
variable.

4 years agoUse = instead of == for better portability
Christian Biesinger via Gdb-patches [Tue, 26 May 2020 16:58:04 +0000 (11:58 -0500)]
Use = instead of == for better portability

Reported by sobukus on IRC.

gdb/testsuite/ChangeLog:

2020-05-26  Christian Biesinger  <cbiesinger@google.com>

        * Makefile.in: Use = instead of == for the test command
        for portability.

Change-Id: I431ccfa5e5ba15f9af082ffd6aa8cd7046456cd2

4 years agoChangeLog entries for f687f5f563
Stefan Schulze Frielinghaus [Tue, 26 May 2020 16:34:39 +0000 (18:34 +0200)]
ChangeLog entries for f687f5f563

4 years agotc-xgate.c: Replace R_XGATE_PCREL_X with BFD_RELOC_XGATE_PCREL_X
H.J. Lu [Tue, 26 May 2020 16:33:48 +0000 (09:33 -0700)]
tc-xgate.c: Replace R_XGATE_PCREL_X with BFD_RELOC_XGATE_PCREL_X

Replace R_XGATE_PCREL_X with BFD_RELOC_XGATE_PCREL_X to silence GCC 10
warning:

gas/config/tc-xgate.c:1339:5: error: implicit conversion from â€˜enum elf_xgate_reloc_type’ to â€˜bfd_reloc_code_real_type’ {aka â€˜enum bfd_reloc_code_real’} [-Werror=enum-conversion]
 1339 |     R_XGATE_PCREL_9);
      |     ^~~~~~~~~~~~~~~

PR gas/26044
* config/tc-xgate.c (md_apply_fix): Check BFD_RELOC_XGATE_PCREL_X
instead of R_XGATE_PCREL_X.
(xgate_parse_operand): Replace R_XGATE_PCREL_X with
BFD_RELOC_XGATE_PCREL_X.

4 years agoS/390: z13: Accept vector alignment hints
Stefan Schulze Frielinghaus [Mon, 18 May 2020 15:22:57 +0000 (17:22 +0200)]
S/390: z13: Accept vector alignment hints

Accept vector alignment hints on z13 although they are ignored there.
The advantage is that any binary compiled for architecture level z13 may
run on z14 or later and benefit from vector alignment hints.

gas/ChangeLog:

2020-05-18  Stefan Schulze Frielinghaus  <stefansf@linux.ibm.com>

* testsuite/gas/s390/zarch-z13.d: Add regexp checks for vector
load/store instruction variants with alignment hints.
* testsuite/gas/s390/zarch-z13.s: Emit new vector load/store
instruction variants with alignment hints.

opcodes/ChangeLog:

2020-05-18  Stefan Schulze Frielinghaus  <stefansf@linux.ibm.com>

* s390-opc.txt: Relocate vector load/store instructions with
additional alignment parameter and change architecture level
constraint from z14 to z13.

4 years agogas: Silence GCC 10 warning on tc-visium.c
H.J. Lu [Tue, 26 May 2020 14:54:05 +0000 (07:54 -0700)]
gas: Silence GCC 10 warning on tc-visium.c

PR gas/26044
* config/tc-visium.c (md_convert_frag): Replace fragP->fr_literal
with &fragP->fr_literal[0].

4 years agogas: Silence GCC 10 warning tc-vax.c
H.J. Lu [Tue, 26 May 2020 14:41:07 +0000 (07:41 -0700)]
gas: Silence GCC 10 warning tc-vax.c

PR gas/26044
* config/tc-vax.c (md_estimate_size_before_relax): Replace
fragP->fr_literal with &fragP->fr_literal[0].
(md_convert_frag): Likewise.

4 years agogas: Silence GCC 10 warning on tc-v850.c
H.J. Lu [Tue, 26 May 2020 13:56:18 +0000 (06:56 -0700)]
gas: Silence GCC 10 warning on tc-v850.c

PR gas/26044
* config/tc-v850.c (md_convert_frag): Replace fragP->fr_literal
with &fragP->fr_literal[0].

4 years agogas: Silence GCC 10 warning on tc-crx.c
H.J. Lu [Tue, 26 May 2020 13:46:26 +0000 (06:46 -0700)]
gas: Silence GCC 10 warning on tc-crx.c

opcode/crx.h has

typedef enum
  {
    ...
    MAX_REG
  }
reg;

typedef enum
  {
    c0 = MAX_REG,
  }
copreg;

tc-crx.c has

static int
getreg_image (reg r)
{
  ...
 /* Check whether the register is in registers table.  */
  if (r < MAX_REG)
    rreg = &crx_regtab[r];
  /* Check whether the register is in coprocessor registers table.  */
  else if (r < (int) MAX_COPREG)
    rreg = &crx_copregtab[r-MAX_REG];
}

Change getreg_image's argument type to int and replace fragP->fr_literal
with &fragP->fr_literal[0] to silence GCC 10 warning.

PR gas/26044
* config/tc-crx.c (getreg_image): Change argument type to int.
(md_convert_frag): Replace fragP->fr_literal with
&fragP->fr_literal[0].

4 years agoExtend the error message displayed when a plugin fails to load.
Nick Clifton [Tue, 26 May 2020 13:49:42 +0000 (14:49 +0100)]
Extend the error message displayed when a plugin fails to load.

* plugin.c (try_load_plugin): Extend error message when a plugin
fails to open.

4 years agotc-score.c: Replace overlapping sprintf with memmove
H.J. Lu [Tue, 26 May 2020 13:09:54 +0000 (06:09 -0700)]
tc-score.c: Replace overlapping sprintf with memmove

Fix GCC 10 warning:

gas/config/tc-score.c:4575:6: error: â€˜sprintf’ argument 3 may overlap destination object â€˜keep_data’ [-Werror=restrict]
 4575 |      sprintf (append_str, "bne %s", keep_data);
      |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

PR gas/26044
* onfig/tc-score.c (s3_do_macro_bcmp): Replace overlapping
sprintf with memmove.

4 years ago[gdb/testsuite] Add test-case gold-gdb-index.exp
Tom de Vries [Tue, 26 May 2020 09:35:32 +0000 (11:35 +0200)]
[gdb/testsuite] Add test-case gold-gdb-index.exp

There's a PR binutils/15646 - "gold-generated .gdb_index has duplicated
symbols that gdb-generated index doesn't", and gdb contains a workaround,
added in commit 8943b87476 "Work around gold/15646".

Add a test-case testing this workaround.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-26  Tom de Vries  <tdevries@suse.de>

* gdb.base/gold-gdb-index-2.c: New test.
* gdb.base/gold-gdb-index.c: New test.
* gdb.base/gold-gdb-index.exp: New file.
* gdb.base/gold-gdb-index.h: New test.

4 years agogas: Silence GCC 10 warning on tc-mcore.c
H.J. Lu [Tue, 26 May 2020 02:37:54 +0000 (19:37 -0700)]
gas: Silence GCC 10 warning on tc-mcore.c

* config/tc-mcore.c (md_convert_frag): Replace fragP->fr_literal
with &fragP->fr_literal[0].

4 years agotc-cr16.c: Use memmove to concatenate 2 overlapping strings
H.J. Lu [Tue, 26 May 2020 02:29:22 +0000 (19:29 -0700)]
tc-cr16.c: Use memmove to concatenate 2 overlapping strings

PR gas/26041
* config/tc-cr16.c (md_assemble): Use memmove to concatenate
2 overlapping strings.

4 years agoAutomatic date update in version.in
GDB Administrator [Tue, 26 May 2020 00:00:13 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agogas: Silence GCC 10 warning on tc-cr16.c
H.J. Lu [Mon, 25 May 2020 23:17:50 +0000 (16:17 -0700)]
gas: Silence GCC 10 warning on tc-cr16.c

* config/tc-cr16.c (md_convert_frag): Replace fragP->fr_literal
with &fragP->fr_literal[0].

4 years agoELF: Updated comments for ET_EXEC and ET_DYN
H.J. Lu [Mon, 25 May 2020 18:26:48 +0000 (11:26 -0700)]
ELF: Updated comments for ET_EXEC and ET_DYN

include/elf/common.h has

 #define ET_EXEC         2       /* Executable file */
 #define ET_DYN          3       /* Shared object file */

These predate PIE:

https://groups.google.com/forum/#!topic/generic-abi/mBKlSNldFW4

Updated comments to

 #define ET_EXEC         2       /* Position-dependent executable file */
 #define ET_DYN          3       /* Position-independent executable or
                                    shared object file */

* elf/common.h: Update comments for ET_EXEC and ET_DYN.

4 years ago[gdb/testsuite] Add target board gold-gdb-index
Tom de Vries [Mon, 25 May 2020 17:36:05 +0000 (19:36 +0200)]
[gdb/testsuite] Add target board gold-gdb-index

Add new target board that uses gold to add a .gdb_index section, enabled by
-ggnu-pubnames.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-25  Tom de Vries  <tdevries@suse.de>

* boards/gold-gdb-index.exp: New file.

4 years agogdb: make avr_integer_to_address generate code or data address based on type
Cristiano De Alti [Mon, 25 May 2020 15:55:56 +0000 (11:55 -0400)]
gdb: make avr_integer_to_address generate code or data address based on type

The AVR architecture is a Harvard one, meaning it has different memory
spaces for code and data.  In GDB, this is dealt with by having the data
(SRAM) addresses start at 0x00800000.  When interpreting an integer as
an address (converting to a CORE_ADDR), we currently always generate a
data address.  This doesn't work for some cases described below, where
the integer is meant to represent a code address.

This patch changes avr_integer_to_address so that it generates the
correct type of address (code or data) based on the passed type.

Using the simavr.exp board, I didn't see any regressions when running
the gdb.base/*.exp tests.  A few tests go from fail to pass, but none
from pass to fail.  There are a few new fails and unresolved, but it's
just because some tests manage to make more progress before failing in a
different way.

In practice, it fixes disassembling by address, as described in the PR:

    - (gdb) disassemble 0x12a,0x12b
    - Dump of assembler code from 0x12a to 0x12b:
    -    0x0000012a <main+0>: push    r28
    - End of assembler dump.

    + (gdb) disassemble 0x12a,0x12b
    + Dump of assembler code from 0x80012a to 0x80012b:
    +    0x0080012a:  nop
    + End of assembler dump.

And also, setting a breakpoint by address:

    - (gdb) p &main
    - $1 = (int (*)(void)) 0x12a <main>
    - (gdb) b *0x12a
    - Breakpoint 1 at 0x80012a

    + (gdb) p &main
    + $1 = (int (*)(void)) 0x12a <main>
    + (gdb) b *0x12a
    + Breakpoint 1 at 0x12a: file test-avr.c, line 3.
    + Note: automatically using hardware breakpoints for read-only addresses.

gdb/ChangeLog:

PR gdb/13519
* avr-tdep.c (avr_integer_to_address): Return data or code
address accordingly to the second 'type' argument of the
function.

Change-Id: Iaea1587d053e86f4ab8aebdcabec8d31a6d262cd

4 years agogdb/testsuite: add simavr.exp board
Simon Marchi [Mon, 25 May 2020 15:55:21 +0000 (11:55 -0400)]
gdb/testsuite: add simavr.exp board

This patch adds a board file for against a simavr target (so, for the
AVR architecture).

simavr, when started with option -g, runs a GDB stub on port 1234.  In
the current latest release (1.6), the port is hardcoded to 1234.  But in
master, there is the option to choose another port.  So while the board
file hardcodes the port today, in the future it should be possible to
let the user choose a port, or automatically select a free port.

It is easy enough to run, make sure you have avr-gcc/avr-g++ and simavr
installed, and as usual just run:

    make check RUNTESTFLAGS="--target_board=simavr"

The following environment variables influence the behavior of the board
file:

  - SIMAVR_MCU: type of chip to simulate
  - SIMAVR_PATH: path to simavr binary (useful if you build your own
    simavr or for some reason it is not simply called `simavr`.

As expected, there are a lot of failures.  Many tests use some features
not supported by such a target, and I suppose there are real GDB bugs
too.  But a lot also passes (including tests that actually run stuff),
so this board file should still help to validate changes to the AVR
architecture support.

These are the results I got of running tests gdb.base/*.exp:

    # of expected passes            20926
    # of unexpected failures        2257
    # of expected failures          14
    # of unknown successes          1
    # of known failures             13
    # of unresolved testcases       592
    # of untested testcases         156
    # of unsupported tests          30
    # of paths in test names        3
    # of duplicate test names       56

gdb/testsuite/ChangeLog:

* boards/simavr.exp: New file.

Change-Id: Ib7fa8c4e2e90b08b104bb9b552df37779de3bc21

4 years agogdb/testsuite: add inferior arguments test
Simon Marchi [Mon, 25 May 2020 15:15:01 +0000 (11:15 -0400)]
gdb/testsuite: add inferior arguments test

Add a test for verifying different methods of passing arguments to the
inferior: the start, starti and run commands, as well as `set args`.

All these methods work naturally when using the unix or
native-extended-gdbserver target boards.  Since those are non-stub
boards, GDB runs new inferiors and therefore pass arguments to them.
With target boards where GDB connects to a stub, for example with
native-gdbserver, they don't really make sense.  The inferior process is
already started when GDB connects.

However, the "run" method is still tested with stub targets, because the
gdb_run_cmd procedure is adapted for stub targets.  Instead of issuing
the `run` command, it spawns whatever program is supposed to bring up
the stub (gdbserver, for example) using gdb_reload and makes GDB connect
to it.  So this allows us to exercise argument passing through the
gdbserver command line, when testing with the native-gdbserver board.

Note that there is already a gdb.base/args.exp, but this tests
specifically the --args switch of GDB.  Perhaps it could be integrated
in this new test, as a new "method".

gdb/testsuite/ChangeLog:

* lib/gdb.exp (gdb_run_cmd): Return success or failure.
* gdb.base/inferior-args.exp: New file.
* gdb.base/inferior-args.c: New file.

Change-Id: Ib61ea6220a47f9f67aed2960dcacd240cb57af70

4 years agogdb/testsuite: support passing inferior arguments with native-gdbserver board
Simon Marchi [Mon, 25 May 2020 15:15:01 +0000 (11:15 -0400)]
gdb/testsuite: support passing inferior arguments with native-gdbserver board

This patch makes it possible to run tests requiring passing arguments to
the inferior with the native-gdbserver board.  The end goal is to write
a test that verifies passing arguments to the inferior works, and to
have that test exercise inferior arguments passed on the gdbserver
command line, when using the native-gdbserver target board (in addition
to the other boards).  This is done in the next patch.

With the native-gdbserver target board, gdbserver is started in
gdb_reload (implemented in config/gdbserver.exp), called in gdb_run_cmd.
gdb_run_cmd already supposedly accepts inferior arguments (although that
feature does not seem to be used anywhere), which it passes to the `run`
command, for non-stub target boards.  I've changed gdb_run_cmd so that
it forwards these arguments to gdb_reload as well.  gdb_reload passes
them to gdbserver_run, and they eventually make their way to the
gdbserver command line.

gdb_run_cmd currently accepts `args` (the varargs of tcl), which means
it receives inferior arguments as a list.  This won't work with
arguments with spaces, because they will end up being formatted with
curly braces like this:

    % set args [list hello "with spaces" world]
    hello {with spaces} world
    % puts "run $args"
    run hello {with spaces} world

I've changed it to accept a single string that is passed to `run` and
gdb_reload.  I've done the same change in gdb_start_cmd and
gdb_starti_cmd, although these two are not used with native-gdbserver.

I've changed all gdb_reload implementations in the tree to accept a new
inferior_args argument, although most of them don't do anything with it
(and don't need to).  People maintaining target boards out of tree will
need to do the same.

I found two tests to adjust to avoid adding new failures or errors.
These tests needed new [use_gdb_stub] checks, because they rely on
having GDB run new processes.  These are guarded by a [target_info
exists noargs], which made them get skipped on native-gdbserver.  But
now that the native-gdbserver board supports args, this is no longer
enough.

Note that with this change, noargs and use_gdb_stub are orthogonal.  It
took me a moment to grasp this, so I thought I would spell out the
different possible situations:

- !noargs and !use_gdb_stub: inferior process started by gdb, can pass
  args
- noargs and !use_gdb_stub: inferior process started by gdb (perhaps
  through extended-remote protocol, the simulator, some other target),
  but that target doesn't support inferior arguments
- noargs and use_gdb_stub: inferior process started by some other
  program to which GDB connects using the remote protocol, that program
  does not support passing args to the inferior process
- !noargs and use_gdb_stub: inferior process started by some other
  program to which GDB connects u sing the remote protocol, that program
  supports passing args to the inferior process

gdb/testsuite/ChangeLog:

* lib/gdb.exp (gdb_run_cmd): Change argument from args to
inferior_args.  Pass it to gdb_reload.
(gdb_start_cmd, gdb_starti_cmd): Change argument from args to
inferior_args.
(gdb_reload): Add inferior_args argument.
* config/gdbserver.exp (gdb_reload): Add inferior_args argument,
pass it to gdbserver_run.
* boards/native-gdbserver.exp: Do not set noargs.
* boards/native-extended-gdbserver.exp (gdb_reload): Add
inferior_args argument.
* boards/stdio-gdbserver-base.exp (gdb_reload): Likewise.
* gdb.base/a2-run.exp: Check for use_gdb_stub.
* gdb.base/args.exp: Likewise.

Change-Id: Ibda027c71867157852f34700342ab31edf39e4d8

4 years agogdbsupport: Drop now unused function 'stringify_argv'
Michael Weghorn [Mon, 25 May 2020 15:40:07 +0000 (11:40 -0400)]
gdbsupport: Drop now unused function 'stringify_argv'

The function did not properly escape special characters
and all uses have been replaced in previous commits, so
drop the now unused function.

gdbsupport/ChangeLog:

* common-utils.cc, common-utils.h (stringify_argv): Drop
now unused function stringify_argv

Change-Id: Id5f861f44eae1f0fbde3476a5eac23a842ed04fc

4 years agoUse construct_inferior_arguments which handles special chars
Michael Weghorn [Mon, 25 May 2020 15:39:43 +0000 (11:39 -0400)]
Use construct_inferior_arguments which handles special chars

Use the construct_inferior_arguments function instead of
stringify_argv to construct a string from the program
arguments in those places where that one is then passed
to fork_inferior (linux-low, lyn-low), since
construct_inferior_arguments properly takes care of
special characters, while stringify_argv does not.
Using construct_inferior_arguments seems "natural", since its
documentation also mentions that it "does the
same shell processing as fork_inferior".

Since construct_inferior_args has been extended to do
proper quoting for Windows shells in commit
5d60742e2dd3c9b475dce54b56043a358751bbb8
("Fix quoting of special characters for the MinGW build.",
2012-06-12), use it for the Windows case as well.
(I could not test that case myself, though.)

Adapt handling of empty args in function 'handle_v_run'
in gdbserver/server.cc to just insert an empty string
for an empty arg, since that one is now properly handled
in 'construct_inferior_arguments' already (and inserting
a "''" string in 'handle_v_run' would otherwise
cause that one to be treated as a string literally
containing two quote characters, which
'construct_inferior_args' would preserve by adding
extra escaping).

This makes gdbserver properly handle program args containing special
characters (like spaces), e.g. (example from PR25893)

  $ gdbserver localhost:50505 myprogram "hello world"

now properly handles "hello world" as a single arg, not two separate
ones ("hello", "world").

gdbserver/ChangeLog:

PR gdbserver/25893
* linux-low.cc (linux_process_target::create_inferior),
lynx-low.cc (lynx_process_target::create_inferior),
win32-low.cc (win32_process_target::create_inferior): Use
construct_inferior_arguments instead of stringify_argv
to get string representation which properly escapes
special characters.
* server.cc (handle_v_run): Just pass empty program arg
as such, since any further processing is now handled via
construct_inferior_arguments.

Change-Id: Ibf963fcd51415c948840fb463289516b3479b0c3

4 years agonto_process_target::create_inferior: Pass args as char **
Michael Weghorn [Mon, 25 May 2020 15:39:20 +0000 (11:39 -0400)]
nto_process_target::create_inferior: Pass args as char **

According to [1], the fifth parameter
to the 'spawnp' function is 'char * const argv[]',
so just pass the args contained in the vector as
an array right away, rather than converting that
to a C string first and passing that one.

With commit 2090129c36c7e582943b7d300968d19b46160d84
("Share fork_inferior et al with gdbserver",
2016-12-22) the type had changed from 'char **'
to 'char *', but I can't see an apparent reason for
that, and 'nto_procfs_target::create_inferior'
(in gdb/nto-procfs.c) also passes a 'char **' to
'spawnp' instead.

I do not know much about that target and cannot actually
test this, however.
The main motivation to look at this was identifying
and replacing the remaining uses of the 'stringify_argv'
function which does not properly do escaping.

[1] http://www.qnx.com/developers/docs/7.0.0/#com.qnx.doc.neutrino.lib_ref/topic/s/spawnp.html

gdbserver/ChangeLog:

* nto-low.cc (nto_process_target::create_inferior): Pass
argv to spawnp function as char **.

Change-Id: Ic46fe745c2aa1118114240d149d4156032f84344

4 years agogdbserver: Don't add extra NULL to program args
Michael Weghorn [Mon, 25 May 2020 15:38:53 +0000 (11:38 -0400)]
gdbserver: Don't add extra NULL to program args

The vector holding the program args is passed as a parameter
to target_create_inferior, which then passes it to
stringify_argv for all platforms, where any NULL entry in
the vector is ignored, so there seems to be no reason
to actually add one after all.

(Since the intention is to replace uses of stringify_argv with
construct_inferior_arguments in a follow-up commit and that
function doesn't currently handle such NULL arguments, it
would otherwise have to be extended.)

gdbserver/ChangeLog:

* server.cc (captured_main), (handle_v_run): No longer
insert extra NULL element to args vector.

Change-Id: Ia2ef6d36814a6b11ce8b0d6e3b33248a7945e825

4 years agogdbsupport: Let construct_inferior_arguments take gdb::array_view param
Michael Weghorn [Mon, 25 May 2020 15:38:32 +0000 (11:38 -0400)]
gdbsupport: Let construct_inferior_arguments take gdb::array_view param

Adapt the construct_inferior_arguments function to
take a gdb::array_view<char * const> parameter instead
of a char * array and an int indicating the length
and adapt the only call site.

This will allow calling it more simply in a follow-up
patch introducing more uses of the function.

gdbsupport/ChangeLog:

* common-inferior.cc, common-inferior.h (construct_inferior_arguments):
Adapt to take a gdb::array_view<char * const> parameter.
Adapt call site.

Change-Id: I1c6496c8c0b0eb3ef3fda96e9e3bd64c5e6cac3c

4 years agogdbsupport: Adapt construct_inferior_arguments
Michael Weghorn [Mon, 25 May 2020 15:38:11 +0000 (11:38 -0400)]
gdbsupport: Adapt construct_inferior_arguments

Allow construct_inferior_arguments to handle zero args
and have it return a std::string, similar to how
stringify_argv in gdbsupport/common-utils does.

Also, add a const qualifier for the second parameter,
since it is only read, not written to.

The intention is to replace existing uses of
stringify_argv by construct_inferior_arguments
in a subsequent step, since construct_inferior_arguments
properly handles special characters, while stringify_argv
doesn't.

gdbsupport/ChangeLog:

* common-inferior.cc, common-inferior.h (construct_inferior_arguments):
Adapt to handle zero args and return a std::string.
Adapt call site.

Change-Id: I126c4390a1018c7527b0b8fd545252ab8a5a7adc

4 years agogdb: Move construct_inferior_arguments to gdbsupport
Michael Weghorn [Mon, 25 May 2020 15:37:44 +0000 (11:37 -0400)]
gdb: Move construct_inferior_arguments to gdbsupport

This moves the function construct_inferior_arguments from
gdb/inferior.h and gdb/infcmd.c to gdbsupport/common-inferior.{h,cc}.
While at it, also move the function's comment to the header file
to align with current standards.

The intention is to use it from gdbserver in a follow-up commit.

gdb/ChangeLog:

* infcmd.c, inferior.h: (construct_inferior_arguments):
Moved function from here to gdbsupport/common-inferior.{h,cc}

gdbsupport/ChangeLog:

* common-inferior.h, common-inferior.cc: (construct_inferior_arguments):
Move function here from gdb/infcmd.c, gdb/inferior.h

Change-Id: Ib9290464ce8c0872f605d8829f88352d064c30d6

4 years ago[gdb/testsuite] Add comment in exec_is_pie
Tom de Vries [Mon, 25 May 2020 15:27:49 +0000 (17:27 +0200)]
[gdb/testsuite] Add comment in exec_is_pie

Add comment to exec_is_pie explaining why readelf -d output is not used.

gdb/testsuite/ChangeLog:

2020-05-25  Tom de Vries  <tdevries@suse.de>

* lib/gdb.exp (exec_is_pie): Add comment.

4 years agold-x86-64: Pass -z notext to linker for tests with DT_TEXTREL
H.J. Lu [Mon, 25 May 2020 13:45:13 +0000 (06:45 -0700)]
ld-x86-64: Pass -z notext to linker for tests with DT_TEXTREL

* testsuite/ld-x86-64/x86-64.exp: Pass -z notext to linker.

4 years agold: Pass -z notext to linker for tests with DT_TEXTREL
H.J. Lu [Mon, 25 May 2020 11:54:31 +0000 (04:54 -0700)]
ld: Pass -z notext to linker for tests with DT_TEXTREL

Some linker tests need DT_TEXTREL.  Pass -z notext to linker for these
tests so that they will pass with DT_TEXTREL check defaulting to warning
or error.

* testsuite/ld-elf/eh6.d: Pass -z notext to linker.
* testsuite/ld-elf/ehdr_start-shared.d: Likewise.
* testsuite/ld-elf/pr19539.d: Likewise.
* testsuite/ld-elfvers/vers.exp: Likewise.
* testsuite/ld-elfvsb/elfvsb.exp: Likewise.
* testsuite/ld-i386/i386.exp: Likewise.
* testsuite/ld-i386/nogot1.d: Likewise.
* testsuite/ld-i386/pr19539.d: Likewise.
* testsuite/ld-i386/pr19636-2a.d: Likewise.
* testsuite/ld-i386/pr19636-2b.d: Likewise.
* testsuite/ld-i386/pr19636-2c.d: Likewise.
* testsuite/ld-i386/pr19636-2d.d: Likewise.
* testsuite/ld-i386/pr19636-2e.d: Likewise.
* testsuite/ld-i386/pr19636-3d.d: Likewise.
* testsuite/ld-i386/pr19636-3e.d: Likewise.
* testsuite/ld-i386/pr19939b.d: Likewise.
* testsuite/ld-i386/undefweaka.d: Likewise.
* testsuite/ld-i386/undefweakb.d: Likewise.
* testsuite/ld-shared/shared.exp: Likewise.
* testsuite/ld-size/size.exp: Likewise.
* testsuite/ld-unique/unique.exp: Likewise.
* testsuite/ld-x86-64/pie1.d: Likewise.
* testsuite/ld-x86-64/pr19539a.d: Likewise.
* testsuite/ld-x86-64/pr19539b.d: Likewise.
* testsuite/ld-x86-64/pr19636-1d.d: Likewise.
* testsuite/ld-x86-64/pr19636-1e.d: Likewise.
* testsuite/ld-x86-64/pr19807-1a.d: Likewise.
* testsuite/ld-x86-64/pr19807-1b.d: Likewise.
* testsuite/ld-x86-64/pr19807-2b.d: Likewise.
* testsuite/ld-x86-64/pr19807-2c.d: Likewise.
* testsuite/ld-x86-64/pr19807-2d.d: Likewise.
* testsuite/ld-x86-64/pr19807-2e.d: Likewise.
* testsuite/ld-x86-64/pr19939b.d: Likewise.
* testsuite/ld-x86-64/x86-64.exp: Likewise.

4 years agogas: Update fr_literal access in frag for GCC 10
H.J. Lu [Mon, 25 May 2020 11:50:56 +0000 (04:50 -0700)]
gas: Update fr_literal access in frag for GCC 10

When access fr_literal in

struct frag {
  ...
  /* Data begins here.  */
  char fr_literal[1];
};

with

char *buf = fragp->fr_fix + fragp->fr_literal;

GCC 10 gave

gas/config/tc-csky.c: In function â€˜md_convert_frag’:
gas/config/tc-csky.c:4507:9: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
 4507 |  buf[1] = BYTE_1 (CSKYV1_INST_SUBI | (7 << 4));
      |         ^

Change

  char *buf = fragp->fr_fix + fragp->fr_literal;

to

  char *buf = fragp->fr_fix + &fragp->fr_literal[0];

to silence GCC 10 warning.

* config/tc-csky.c (md_convert_frag): Replace fragp->fr_literal
with &fragp->fr_literal[0].
* config/tc-microblaze.c (md_apply_fix): Likewise.
* config/tc-sh.c (md_convert_frag): Likewise.

4 years ago[gdb/testsuite] Fix var use in compile_and_download_n_jit_so
Tom de Vries [Mon, 25 May 2020 10:28:54 +0000 (12:28 +0200)]
[gdb/testsuite] Fix var use in compile_and_download_n_jit_so

In commit 1b59ca1cf1 "[gdb/testsuite] Fix tcl error in jit-elf-helpers.exp", I
introduced a variable f in compile_and_download_n_jit_so, to be used in the
untested message, but actually variable binfile was used instead:
...
+           set f [file tail $binfile]
+           untested "failed to compile shared library $binfile"
...

Fix this by using $f in the untested message.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-25  Tom de Vries  <tdevries@suse.de>

* lib/jit-elf-helpers.exp (compile_and_download_n_jit_so): Use $f
instead of $binfile in the untested message.

4 years ago[gdb/testsuite] Fix exec_is_pie with gold linker
Tom de Vries [Mon, 25 May 2020 10:01:52 +0000 (12:01 +0200)]
[gdb/testsuite] Fix exec_is_pie with gold linker

When running test-case gdb.base/break-interp.exp with target board gold, we
run into:
...
gdb compile failed, pie failed to generate PIE executable
...

The problem is that the proc exec_is_pie uses the PIE flag in the readelf -d
output, which doesn't seem to be set by the gold linker.

Instead, use the "Type" field in the readelf -h output.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-25  Tom de Vries  <tdevries@suse.de>

PR testsuite/26031
* lib/gdb.exp (exec_is_pie): Test readelf -h output.

4 years ago[gdb/testsuite] Add target board gold
Tom de Vries [Mon, 25 May 2020 10:01:52 +0000 (12:01 +0200)]
[gdb/testsuite] Add target board gold

Add a target board that uses the gold linker.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-05-25  Tom de Vries  <tdevries@suse.de>

* boards/gold.exp: New file.

4 years agoRevert "Add completion styling"
Tom Tromey [Mon, 25 May 2020 02:25:09 +0000 (20:25 -0600)]
Revert "Add completion styling"

This reverts commit eca1f90cf47a2edc1a1cd22e12c6c0f3b900654e.  Several
changes were requested, and it seemed simplest to revert it.

gdb/ChangeLog
2020-05-23  Tom Tromey  <tom@tromey.com>

Revert commit eca1f90c:
* NEWS: Remove entry for completion styling.
* completer.c (_rl_completion_prefix_display_length): Move
declaration later.
(gdb_fnprint): Revert.
(gdb_display_match_list_1): Likewise.
* cli/cli-style.c (completion_prefix_style)
(completion_difference_style, completion_suffix_style): Remove.
(_initialize_cli_style): Revert.
* cli/cli-style.h (completion_prefix_style)
(completion_difference_style, completion_suffix_style): Don't
declare.

gdb/doc/ChangeLog
2020-05-23  Tom Tromey  <tom@tromey.com>

* gdb.texinfo (Output Styling): Don't mention completion styling.
(Editing): Don't mention readline completion styling.

gdb/testsuite/ChangeLog
2020-05-23  Tom Tromey  <tom@tromey.com>

* gdb.base/style.exp: Remove completion styling test.
* lib/gdb-utils.exp (style): Remove completion styles.

4 years agoAutomatic date update in version.in
GDB Administrator [Mon, 25 May 2020 00:00:06 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agoRISC-V: Gas inserts cfa relocs in wrong section.
Jim Wilson [Sun, 24 May 2020 23:42:21 +0000 (16:42 -0700)]
RISC-V: Gas inserts cfa relocs in wrong section.

The frag code makes a distinction between inserting frags before the frag
chains are chained together and afterward.  After chaining, we need to set
now_seg before creating the frag.  tc-xtensa.c has a function called
fix_new_exp_in_seg that handles this right, but switches segments twice each
time it is called.  In this case, we can inline it and pull the save and
restore out of the loop to get better code.

gas/
PR 26025
* config/tc-riscv.c (riscv_pre_output_hook): Change s type from const
asection to segT.  New locals seg and subseg.  Call subseg_set before
fix_new_exp.  Call subseg_set after loop to restore original values.

4 years agogdb: make gdbarch.sh write gdbarch.{c,h} directly
Simon Marchi [Mon, 11 May 2020 21:18:25 +0000 (17:18 -0400)]
gdb: make gdbarch.sh write gdbarch.{c,h} directly

It was suggested in this thread [1] that gdbarch.sh should write to
gdbarch.h and gdbarch.c directly.  This patch implements that.

When running gdbarch.sh, we currently need to move new-gdbarch.c over
gdbarch.c and new-gdbarch.h over gdbarch.h.  It might have been useful
at some point to not have gdbarch.sh overwrite gdbarch.h and gdbarch.c,
but with git it's really unnecessary.  Any changes to gdbarch.sh can be
inspected using `git diff`.

A next step would be to have the Makefile automatically run gdbarch.sh
if it sees that gdbarch.c and gdbarch.h are out of date.  Or maybe even
remove gdbarch.c and gdbarch.h from the tree and generate them in the
build directory when building.  But that requires more thinking and
discussions, and I think that this change is already useful in itself.

[1] https://sourceware.org/pipermail/gdb-patches/2020-May/168265.html

gdb/ChangeLog;

* gdbarch.sh: Write to gdbarch.c/gdbarch.h directly.  Don't
compare old and new versions.
(compare_new): Remove.

Change-Id: I7970a9e8af0afc0145cb5a28e73d94fbaa1e25b9

4 years agoDon't remove C++ aliases from completions if symbol doesn't match
Pedro Alves [Sun, 24 May 2020 12:32:25 +0000 (13:32 +0100)]
Don't remove C++ aliases from completions if symbol doesn't match

completion_list_add_symbol currently tries to remove C++ function
aliases from the completions match list even if the symbol passed down
wasn't successfully added to the completion list because it didn't
match.  I.e., we call cp_canonicalize_string_no_typedefs for each and
every C++ function in the program, which is useful work.  This patch
skips that useless work.

gdb/ChangeLog:
2020-05-24  Pedro Alves  <palves@redhat.com>

* symtab.c (completion_list_add_name): Return boolean indication
of whether the symbol matched.
(completion_list_add_symbol): Don't try to remove C++ aliases if
the symbol didn't match in the first place.
* symtab.h (completion_list_add_name): Return bool.

4 years agold: Handle --dynamic-list* before -Bsymbolic -Bsymbolic-functions
Fangrui Song [Thu, 21 May 2020 01:31:39 +0000 (18:31 -0700)]
ld: Handle --dynamic-list* before -Bsymbolic -Bsymbolic-functions

--dynamic-list* should work both before and after -Bsymbolic and
-Bsymbolic-functions.

PR ld/26018
* lexsup.c (parse_args): Simplify.
* testsuite/ld-elf/dl4e.out: New.
* testsuite/ld-elf/shared.exp: Updated for PR ld/26018 tests.

4 years agold: Add -Bsymbolic-functions tests
H.J. Lu [Sun, 24 May 2020 03:49:16 +0000 (20:49 -0700)]
ld: Add -Bsymbolic-functions tests

PR ld/26018
* testsuite/ld-i386/i386.exp: Add a -Bsymbolic-functions test.
* testsuite/ld-x86-64/x86-64.exp: Likewise.
* testsuite/ld-i386/pr26018.d: New file.
* testsuite/ld-x86-64/pr26018.d: Likewise.
* testsuite/ld-x86-64/pr26018.s: Likewise.

4 years agoAutomatic date update in version.in
GDB Administrator [Sun, 24 May 2020 00:00:06 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agogdb: remove TYPE_FIELD macro
Simon Marchi [Sat, 23 May 2020 21:39:54 +0000 (17:39 -0400)]
gdb: remove TYPE_FIELD macro

Replace all uses of it by type::field.

Note that since type::field returns a reference to the field, some spots
are used to assign the whole field structure.  See ctfread.c, function
attach_fields_to_type, for example.  This is the same as was happening
with the macro, so I don't think it's a problem, but if anybody sees a
really nicer way to do this, now could be a good time to implement it.

gdb/ChangeLog:

* gdbtypes.h (TYPE_FIELD): Remove.  Replace all uses with
type::field.

4 years agoDocument the GDB 9.2 release in gdb/ChangeLog
Joel Brobecker [Sat, 23 May 2020 21:19:06 +0000 (14:19 -0700)]
Document the GDB 9.2 release in gdb/ChangeLog

gdb/ChangeLog:

GDB 9.2 released.

4 years agoAdd completion styling
Tom Tromey [Sat, 23 May 2020 15:23:09 +0000 (09:23 -0600)]
Add completion styling

Readline has a styling feature for completion -- if it is enabled, the
common prefix of completions will be displayed in a different style.
This doesn't work in gdb, because gdb implements its own completer.

This patch implements the feature.  However, it doesn't directly use
the Readline feature, because gdb can do a bit better: it can let the
user control the styling using the existing mechanisms.

This version incorporates an Emacs idea, via Eli: style the prefix,
the "difference character", and the suffix differently.

gdb/ChangeLog
2020-05-23  Tom Tromey  <tom@tromey.com>

* NEWS: Add entry for completion styling.
* completer.c (_rl_completion_prefix_display_length): Move
declaration earlier.
(gdb_fnprint): Use completion_style.
(gdb_display_match_list_1): Likewise.
* cli/cli-style.c (completion_prefix_style)
(completion_difference_style, completion_suffix_style): New
globals.
(_initialize_cli_style): Register new globals.
* cli/cli-style.h (completion_prefix_style)
(completion_difference_style, completion_suffix_style): Declare.

gdb/doc/ChangeLog
2020-05-23  Tom Tromey  <tom@tromey.com>

* gdb.texinfo (Output Styling): Mention completion styling.
(Editing): Mention readline completion styling.

gdb/testsuite/ChangeLog
2020-05-23  Tom Tromey  <tom@tromey.com>

* gdb.base/style.exp: Add completion styling test.
* lib/gdb-utils.exp (style): Add completion styles.

4 years agoUse safe-ctype.h (ISSPACE etc.) in symbol parsing & comparison
Pedro Alves [Sat, 23 May 2020 11:46:37 +0000 (12:46 +0100)]
Use safe-ctype.h (ISSPACE etc.) in symbol parsing & comparison

This patch avoids depending on the current locale when parsing &
comparing symbol names, by using libiberty's safe-ctype.h uppercase
TOLOWER, ISXDIGIT, etc. macros instead of the standard ctype.h
tolower, isxdigit, etc. macros/functions.

This commit:

 commit b1b60145aedb8adcb0b9dcf43a5ae735c2f03b51
 Author:     Pedro Alves <palves@redhat.com>
 AuthorDate: Tue May 22 17:35:38 2018 +0100

    Support UTF-8 identifiers in C/C++ expressions (PR gdb/22973)

did something similar, except in the expression parser.

This can improve GDB's symbol loading performance significantly.
Currently strcmp_iw_ordered can show up high on profiles (called from
sort_pst_symbols -> std::sort) because of the isspace and tolower
functions.  Hannes mentions seeing it as high as in ~24% of the
profiling samples on Windows
(https://sourceware.org/pipermail/gdb-patches/2020-May/168858.html).

I tested GDB's performance (built with "-g -O2") loading a "-g -O0"
build of gdb.

I ran GDB 10 times like:

  /bin/time -f %e \
    ./gdb/gdb --data-directory ./gdb/data-directory -nx \
    -batch /tmp/gdb-g-O0

Then I computed the mean time.

The baseline mean time was

 gdb    2.515

This patch brings the number down to

 gdb    2.096

Which is an around 16% improvement.

gdb/ChangeLog:
2020-05-23  Pedro Alves  <palves@redhat.com>

* utils.c: Include "gdbsupport/gdb-safe-ctype.h".
(parse_escape): Use ISDIGIT instead of isdigit.
(puts_debug): Use gdb_isprint instead of isprint.
(fprintf_symbol_filtered): Use ISALNUM instead of isalnum.
(cp_skip_operator_token, skip_ws, strncmp_iw_with_mode): Use
ISSPACE instead of isspace.
(strncmp_iw_with_mode): Use TOLOWER instead of tolower and ISSPACE
instead of isspace.
(strcmp_iw_ordered): Use ISSPACE instead of isspace.
(string_to_core_addr): Use TOLOWER instead of tolower, ISXDIGIT
instead of isxdigit and ISDIGIT instead of isdigit.

gdbsupport/ChangeLog:
2020-05-23  Pedro Alves  <palves@redhat.com>

* gdb-safe-ctype.h: New.

4 years agoFix potential segfault
Alan Modra [Sat, 23 May 2020 07:21:30 +0000 (16:51 +0930)]
Fix potential segfault

Code in vms-lib.c leaves arch_header NULL.

* bfdio.c (bfd_get_file_size): Don't segfault on NULL arch_header.

4 years agoar many_files test
Alan Modra [Fri, 22 May 2020 22:35:14 +0000 (08:05 +0930)]
ar many_files test

This tests for the issue fixed with git commit 0490dd41ae.

* testsuite/binutils-all/ar.exp (many_files): New test.

4 years agoAutomatic date update in version.in
GDB Administrator [Sat, 23 May 2020 00:00:14 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agogdb: remove TYPE_FIELDS macro
Simon Marchi [Fri, 22 May 2020 20:55:17 +0000 (16:55 -0400)]
gdb: remove TYPE_FIELDS macro

Remove all uses of the `TYPE_FIELDS` macro.  Replace them with either:

1) type::fields, to obtain a pointer to the fields array (same as
   TYPE_FIELDS yields)
2) type::field, a new convenience method that obtains a reference to one
   of the type's field by index.  It is meant to replace

     TYPE_FIELDS (type)[idx]

   with

     type->field (idx)

gdb/ChangeLog:

* gdbtypes.h (struct type) <field>: New method.
(TYPE_FIELDS): Remove, replace all uses with either type::fields
or type::field.

Change-Id: I49fba10114417deb502060c6156aa5f7fc62462f

4 years agogdb: add type::fields / type::set_fields
Simon Marchi [Fri, 22 May 2020 20:55:16 +0000 (16:55 -0400)]
gdb: add type::fields / type::set_fields

Add the `fields` and `set_fields` methods on `struct type`, in order to
remove the `TYPE_FIELDS` macro.  In this patch, the `TYPE_FIELDS` macro
is changed to the `type::fields`, so all the call sites that use it to
set the fields array are changed to use `type::set_fields`.  The next
patch will remove `TYPE_FIELDS` entirely.

gdb/ChangeLog:

* gdbtypes.h (struct type) <fields, set_fields>: New methods.
(TYPE_FIELDS): Use type::fields.  Change all call sites that
modify the propery to use type::set_fields instead.

Change-Id: I05174ce68f2ce3fccdf5d8b469ff141f14886b33

4 years agogdb: remove TYPE_NFIELDS macro
Simon Marchi [Fri, 22 May 2020 20:55:15 +0000 (16:55 -0400)]
gdb: remove TYPE_NFIELDS macro

Remove `TYPE_NFIELDS`, changing all the call sites to use
`type::num_fields` directly.  This is quite a big diff, but this was
mostly done using sed and coccinelle.  A few call sites were done by
hand.

gdb/ChangeLog:

* gdbtypes.h (TYPE_NFIELDS): Remove.  Change all cal sites to use
type::num_fields instead.

Change-Id: Ib73be4c36f9e770e0f729bac3b5257d7cb2f9591

4 years agogdb: add type::num_fields / type::set_num_fields
Simon Marchi [Fri, 22 May 2020 20:55:14 +0000 (16:55 -0400)]
gdb: add type::num_fields / type::set_num_fields

Add the `num_fields` and `set_num_fields` methods on `struct type`, in
order to remove the `TYPE_NFIELDS` macro.  In this patch, the
`TYPE_NFIELDS` macro is changed to use `type::num_fields`, so all the
call sites that are used to set the number of fields are changed to use
`type::set_num_fields`.  The next patch will remove `TYPE_NFIELDS`
completely.

I think that in the future, we should consider making the interface of
`struct type` better.  For example, right now it's possible for the
number of fields property and the actual number of fields set to be out
of sync.  However, I want to keep the existing behavior in this patch,
just translate from macros to methods.

gdb/ChangeLog:

* gdbtypes.h (struct type) <num_fields, set_num_fields>: New
methods.
(TYPE_NFIELDS): Use type::num_fields.  Change all call sites
that modify the number of fields to use type::set_num_fields
instead.

Change-Id: I5ad9de5be4097feaf942d111077434bf91d13dc5

4 years agoRemove obsolete declaration
Tom Tromey [Fri, 22 May 2020 19:34:14 +0000 (13:34 -0600)]
Remove obsolete declaration

Commit c9e0a7e3331 ("Remove munmap_listp_free_cleanup") removed
munmap_listp_free, but missed a declaration.  This patch removes that
as well.

gdb/ChangeLog
2020-05-22  Tom Tromey  <tromey@adacore.com>

* compile/compile-object-load.h (munmap_list_free): Don't
declare.

4 years agogdb: Restore old annotations behaviour when printing frame info
Andrew Burgess [Tue, 12 May 2020 20:29:23 +0000 (21:29 +0100)]
gdb: Restore old annotations behaviour when printing frame info

This undoes most of the changes from these commits:

  commit ec8e2b6d3051f0b4b2a8eee9917898e95046c62f
  Date:   Fri Jun 14 23:43:00 2019 +0100

      gdb: Don't allow annotations to influence what else GDB prints

  commit 0d3abd8cc936360f8c46502135edd2e646473438
  Date:   Wed Jun 12 22:34:26 2019 +0100

      gdb: Remove an update of current_source_line and current_source_symtab

as a result of the discussion here:

  https://sourceware.org/pipermail/gdb/2020-April/048468.html

Having taken time to reflect on the discussion, and reading the
documentation again I believe we should revert GDB's behaviour back to
how it used to be.

The original concern that triggered the initial patch was that when
annotations were on the current source and line were updated (inside
the annotation code), while when annotations are off this update would
not occur.  This was incorrect, as printing the source with the call
to print_source_lines does also update the current source and line.

Further, the documentation here:
  https://sourceware.org/gdb/current/onlinedocs/gdb/Source-Annotations.html#Source-Annotations

Clearly states:

  "The following annotation is used instead of displaying source code:

   ^Z^Zsource filename:line:character:middle:addr

   ..."

So it is documented that the 'source' annotation is a replacement for,
and not in addition to, actually printing the source lie.

There are still a few issues that I can see, these are:

  1. In source.c:info_line_command, when annotations are on we call
  annotate_source_line, however, if annotations are off then there is
  no corresponding call to print the source line.  This means that a
  if a user uses 'info line ...' with annotations on, and then does a
  'list', they will get different results than if they had done this
  with annotations off.

  2. It bothers me that the call to annotate_source_line returns a
  boolean, and that this controls a call to print_source_line (in
  stack.c:print_frame_info).

  The reason for this is that the source line annotation will only
  print something if the file is found, and the line number is in
  range for the file.

  It seems to me like an annotation should always be printed, either
  one that identifies the file and line, or one that identifies the
  file and line GDB would like to access, but couldn't.

  I considered changing this, but in the end decided not too, if I
  extend the existing 'source' annotation to print something in all
  cases then I risk breaking existing UIs that rely on the file and
  line always being valid.  If I add a new annotation then this might
  also break existing UIs that rely on GDB itself printing the error
  from within print_source_line.

Given that annotations is deprecated (as I understand it) mechanism
for UIs to interact with GDB (in favour of MI) I figure we should just
restore the old behaviour, and leave the mini-bugs in until someone
actually complains.

This isn't a straight revert of the two commits mentioned above.  I've
left annotate_source_line instead of going back to the original
identify_source_line, which lived in source.c, but was really
annotation related.  The API for setting the current source and line
has changed since the original patches, so I updated for that change
too.  Finally I wrote the code in stack.c so that we avoided an extra
level of indentation, which I felt made things easier to read.

gdb/ChangeLog:

* annotate.c (annotate_source_line): Update return type, add call
to update current symtab and line.
* annotate.h (annotate_source_line): Update return type, and
extend header comment.
* source.c (info_line_command): Check annotation_level before
calling annotate_source_line.
* stack.c (print_frame_info): If calling annotate_source_line
returns true, then don't print any other source line information.

gdb/testsuite/ChangeLog:

* gdb.base/annota1.exp: Update expected results.
* gdb.cp/annota2.exp: Update expected results, remove duplicate
test name.
* gdb.cp/annota3.exp: Update expected results.

4 years agoPowerPC: downgrade FP mismatch error for shared libraries to a warning
Alan Modra [Fri, 22 May 2020 02:12:43 +0000 (11:42 +0930)]
PowerPC: downgrade FP mismatch error for shared libraries to a warning

PR 25882
bfd/
* elf32-ppc.c (_bfd_elf_ppc_merge_fp_attributes): Don't init FP
attributes from shared libraries, and do not return an error if
they don't match.
gold/
* powerpc.cc (merge_object_attributes): Replace name param with
obj param.  Update callers.  Don't init FP attributes from shared
libraries, and do not emit an error if they don't match.

4 years agoAutomatic date update in version.in
GDB Administrator [Fri, 22 May 2020 00:00:15 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agogdb: fix -Wtautological-overlap-compare error in lm32-tdep.c
Simon Marchi [Thu, 21 May 2020 17:22:10 +0000 (13:22 -0400)]
gdb: fix -Wtautological-overlap-compare error in lm32-tdep.c

Building with clang 11, we get:

    /home/smarchi/src/binutils-gdb/gdb/lm32-tdep.c:84:44: error: overlapping comparisons always evaluate to false [-Werror,-Wtautological-overlap-compare]
        return ((regnum >= SIM_LM32_EA_REGNUM) && (regnum <= SIM_LM32_BA_REGNUM))
                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Indeed, this doesn't make sense, as EA_REGNUM is greater than BA_REGNUM.
I'll assume that it was just a mistake and that these two should be
swapped.

The regnums for BA and EA are contiguous, so ultimately this particular
part of the condition is only true if regnum is == EA or == BA.  These
registers are Exception Address and Breakpoint Address, so I guess it
makes sense for them to be in the system register group.

The relevant reference is here:

  https://www.latticesemi.com/-/media/LatticeSemi/Documents/UserManuals/JL/LatticeMico32ProcessorReferenceManual39.ashx?document_id=52077

gdb/ChangeLog:

* lm32-tdep.c (lm32_register_reggroup_p): Fix condition.

4 years agogdb: remove unnecessary NULL checks before xfree
Simon Marchi [Thu, 21 May 2020 17:12:29 +0000 (13:12 -0400)]
gdb: remove unnecessary NULL checks before xfree

I was inspired by a series of patches merged by Alan Modra in the other
projects, so I did the same in GDB with a bit of Coccinelle and grep.

This patch removes the unnecessary NULL checks before calls to xfree.
They are unnecessary because xfree already does a NULL check.  Since
free is supposed to handle NULL values correctly, the NULL check in
xfree itself is also questionable, but I've left it there for now.

gdb/ChangeLog:

* coffread.c (patch_type): Remove NULL check before xfree.
* corefile.c (set_gnutarget): Likewise.
* cp-abi.c (set_cp_abi_as_auto_default): Likewise.
* exec.c (build_section_table): Likewise.
* remote.c (remote_target::pass_signals): Likewise.
* utils.c (n_spaces): Likewise.
* cli/cli-script.c (document_command): Likewise.
* i386-windows-tdep.c (core_process_module_section): Likewise.
* linux-fork.c (struct fork_info) <~fork_info>: Likewise.

4 years agoRe: PR25993, read of freed memory
Alan Modra [Thu, 21 May 2020 14:04:58 +0000 (23:34 +0930)]
Re: PR25993, read of freed memory

git commit 7b958a48e132 put the bfd filename in the bfd objalloc
memory.  That means the filename is freed by _bfd_free_cached_info.
Which is called by _bfd_compute_and_write_armap to tidy up symbol
tables after they are done with.

Unfortunately, _bfd_write_archive_contents wants to seek and read from
archive elements after that point, and if the number of elements
exceeds max_open_files in cache.c then some of those elements will
have their files closed.  To reopen, you need the filename.

PR 25993
* opncls.c (_bfd_free_cached_info): Keep a copy of the bfd
filename.
(_bfd_delete_bfd): Free the copy.
(_bfd_new_bfd): Free nbfd->memory on error.

4 years agoReplace "if (x) free (x)" with "free (x)", opcodes
Alan Modra [Wed, 20 May 2020 13:17:29 +0000 (22:47 +0930)]
Replace "if (x) free (x)" with "free (x)", opcodes

cpu/
* mep.opc (mep_cgen_expand_macros_and_parse_operand): Replace
"if (x) free (x)" with "free (x)".
opcodes/
* arc-ext.c: Replace "if (x) free (x)" with "free (x)" throughout.
* sparc-dis.c: Likewise.
* tic4x-dis.c: Likewise.
* xtensa-dis.c: Likewise.
* bpf-desc.c: Regenerate.
* epiphany-desc.c: Regenerate.
* fr30-desc.c: Regenerate.
* frv-desc.c: Regenerate.
* ip2k-desc.c: Regenerate.
* iq2000-desc.c: Regenerate.
* lm32-desc.c: Regenerate.
* m32c-desc.c: Regenerate.
* m32r-desc.c: Regenerate.
* mep-asm.c: Regenerate.
* mep-desc.c: Regenerate.
* mt-desc.c: Regenerate.
* or1k-desc.c: Regenerate.
* xc16x-desc.c: Regenerate.
* xstormy16-desc.c: Regenerate.

4 years agoReplace "if (x) free (x)" with "free (x)", ld
Alan Modra [Wed, 20 May 2020 13:20:49 +0000 (22:50 +0930)]
Replace "if (x) free (x)" with "free (x)", ld

* deffilep.y: Replace "if (x) free (x)" with "free (x)" thoughout.
* emultempl/elf.em: Likewise.
* emultempl/msp430.em: Likewise.
* emultempl/pe.em: Likewise.
* emultempl/pep.em: Likewise.
* emultempl/ppc64elf.em: Likewise.
* emultempl/xtensaelf.em: Likewise.
* ldelf.c: Likewise.
* ldfile.c: Likewise.
* ldmain.c: Likewise.
* ldmisc.c: Likewise.
* lexsup.c: Likewise.
* pe-dll.c: Likewise.

4 years agoReplace "if (x) free (x)" with "free (x)", gprof
Alan Modra [Wed, 20 May 2020 13:19:51 +0000 (22:49 +0930)]
Replace "if (x) free (x)" with "free (x)", gprof

* utils.c (print_name_only): Free demangled without checking
first for non-NULL.

4 years agoReplace "if (x) free (x)" with "free (x)", gas
Alan Modra [Wed, 20 May 2020 13:19:01 +0000 (22:49 +0930)]
Replace "if (x) free (x)" with "free (x)", gas

* atof-generic.c: Replace "if (x) free (x)" with "free (x)"
throughout.
* config/obj-elf.c: Likewise.
* config/tc-aarch64.c: Likewise.
* config/tc-arm.c: Likewise.
* config/tc-m68k.c: Likewise.
* config/tc-nios2.c: Likewise.
* config/tc-tic30.c: Likewise.
* ecoff.c: Likewise.
* read.c: Likewise.
* stabs.c: Likewise.
* symbols.c: Likewise.
* testsuite/gas/all/test-gen.c: Likewise.