This changes value::contents to be a unique_xmalloc_ptr, removing a
small bit of manual memory management.
gdb/ChangeLog
2018-04-06 Tom Tromey <tom@tromey.com>
* value.c (~value): Update.
(struct value) <contents>: Now unique_xmalloc_ptr.
(value_contents_bits_eq, allocate_value_contents)
(value_contents_raw, value_contents_all_raw)
(value_contents_for_printing, value_contents_for_printing_const)
(set_value_enclosing_type): Update.
This changes value::parent to a value_ref_ptr. This removes a bit of
manual reference count management.
gdb/ChangeLog
2018-04-06 Tom Tromey <tom@tromey.com>
* value.c (~value): Update.
(struct value) <parent>: Now a value_ref_ptr.
(value_parent, set_value_parent, value_address, value_copy):
Update.
This adds a constructor and destructor to struct value, and then
changes value.c to use "new" and "delete".
While doing this I noticed a memory leak -- value_decref was not
freeing value::optimized_out. This patch fixes this leak.
gdb/ChangeLog
2018-04-06 Tom Tromey <tom@tromey.com>
* value.c (struct value): Add constructor, destructor, and member
initializers.
(allocate_value_lazy, value_decref): Update.
This patch converts all_values to simply hold a list of references to
values. Now, there's no need to have a value record whether or not it
is released -- there is only a single reference-counting mechanism for
values. So, this also removes value::next, value::released, and
value_next.
gdb/ChangeLog
2018-04-06 Tom Tromey <tom@tromey.com>
* value.c (struct value) <released, next>: Remove.
(all_values): Now a std::vector.
(allocate_value_lazy): Update.
(value_next): Remove.
(value_mark, value_free_to_mark, release_value)
(value_release_to_mark): Update.
This patch changes value_release_to_mark and fetch_subexp_value to
return a std::vector of value references, rather than relying on the
"next" field that is contained in a struct value. This makes it
simpler to reason about the returned values, and also allows for the
removal of free_value_chain.
gdb/ChangeLog
2018-04-06 Tom Tromey <tom@tromey.com>
* value.h (fetch_subexp_value, value_release_to_mark): Update.
(free_value_chain): Remove.
* value.c (free_value_chain): Remove.
(value_release_to_mark): Return a std::vector.
* ppc-linux-nat.c (num_memory_accesses): Change "chain" to a
std::vector.
(check_condition): Update.
* eval.c (fetch_subexp_value): Change "val_chain" to a
std::vector.
* breakpoint.c (update_watchpoint): Update.
(can_use_hardware_watchpoint): Change "vals" to a std::vector.
free_all_values is unused, so this removes it.
gdb/ChangeLog
2018-04-06 Tom Tromey <tom@tromey.com>
* value.h (free_all_values): Remove.
* value.c (free_all_values): Remove.
This simplifies the value history implementation by replacing the
current data structure with a std::vector, and by making the value
history simply hold a reference to each value.
gdb/ChangeLog
2018-04-06 Tom Tromey <tom@tromey.com>
* value.c (VALUE_HISTORY_CHUNK, struct value_history_chunk)
(value_history_chain, value_history_count): Remove.
(value_history): New global.
(record_latest_value, access_value_history, show_values)
(preserve_values): Update.
This patch removes some manual reference count manipulation by
changing last_examine_value to be a value_ref_ptr and then updating
the users.
gdb/ChangeLog
2018-04-06 Tom Tromey <tom@tromey.com>
* printcmd.c (last_examine_address): Change type to
value_ref_ptr.
(do_examine, x_command): Update.
Now that value_ref_ptr exists, it is possible to simplify breakpoint
and bpstat memory management by using a value_ref_ptr rather than
manually handling the reference counts.
gdb/ChangeLog
2018-04-06 Tom Tromey <tom@tromey.com>
* value.c (release_value): Update.
* breakpoint.h (struct watchpoint) <val>: Now a value_ref_ptr.
(struct bpstats) <val>: Now a value_ref_ptr.
* breakpoint.c (update_watchpoint, breakpoint_init_inferior)
(~bpstats, bpstats, bpstat_clear_actions, watchpoint_check)
(~watchpoint, print_it_watchpoint, watch_command_1)
(invalidate_bp_value_on_memory_change): Update.
struct value is internally reference counted and so, while it also has
some ownership rules unique to it, it makes sense to use a gdb_ref_ptr
when managing it automatically.
This patch removes the existing unique_ptr specialization in favor of
a reference-counted pointer. It also introduces two other
clarifications:
1. Rename value_free to value_decref, which I think is more in line
with what the function actually does; and
2. Change release_value to return a gdb_ref_ptr. This change allows
us to remove the confusing release_value_or_incref function,
primarily by making it much simpler to reason about the result of
release_value.
gdb/ChangeLog
2018-04-06 Tom Tromey <tom@tromey.com>
* varobj.c (varobj_clear_saved_item)
(update_dynamic_varobj_children, install_new_value, ~varobj):
Update.
* value.h (value_incref): Move declaration earlier.
(value_decref): Rename from value_free.
(struct value_ref_policy): New.
(value_ref_ptr): New typedef.
(struct value_deleter): Remove.
(gdb_value_up): Remove typedef.
(release_value): Change return type.
(release_value_or_incref): Remove.
* value.c (set_value_parent): Update.
(value_incref): Change return type.
(value_decref): Rename from value_free.
(value_free_to_mark, free_all_values, free_value_chain): Update.
(release_value): Return value_ref_ptr.
(release_value_or_incref): Remove.
(record_latest_value, set_internalvar, clear_internalvar):
Update.
* stack.c (info_frame_command): Don't call value_free.
* python/py-value.c (valpy_dealloc, valpy_new)
(value_to_value_object): Update.
* printcmd.c (do_examine): Update.
* opencl-lang.c (lval_func_free_closure): Update.
* mi/mi-main.c (register_changed_p): Don't call value_free.
* mep-tdep.c (mep_frame_prev_register): Don't call value_free.
* m88k-tdep.c (m88k_frame_prev_register): Don't call value_free.
* m68hc11-tdep.c (m68hc11_frame_prev_register): Don't call
value_free.
* guile/scm-value.c (vlscm_free_value_smob)
(vlscm_scm_from_value): Update.
* frame.c (frame_register_unwind, frame_unwind_register_signed)
(frame_unwind_register_unsigned, get_frame_register_bytes)
(put_frame_register_bytes): Don't call value_free.
* findvar.c (address_from_register): Don't call value_free.
* dwarf2read.c (dwarf2_compute_name): Don't call value_free.
* dwarf2loc.c (entry_data_value_free_closure)
(value_of_dwarf_reg_entry, free_pieced_value_closure)
(dwarf2_evaluate_loc_desc_full): Update.
* breakpoint.c (update_watchpoint, breakpoint_init_inferior)
(~bpstats, bpstats, bpstat_clear_actions, watchpoint_check)
(~watchpoint, watch_command_1)
(invalidate_bp_value_on_memory_change): Update.
* alpha-tdep.c (alpha_register_to_value): Don't call value_free.
As shown in PR 23022, building with clang-6 and Python 2 trips on the
fact that the Python 2 headers use the "register" keyword:
/usr/include/python2.7/unicodeobject.h:534:5: error: 'register' storage class specifier is deprecated and incompatible with C++17 [-Werror,-Wdeprecated-register]
register PyObject *obj, /* Object */
^~~~~~~~~
This patch adds -Wno-error=deprecated-register to our flags, so that we can
still see this class of warnings, but they don't cause a build failure.
gdb/ChangeLog:
PR gdb/23022
* warning.m4: Add -Wno-error=deprecated-register.
* configure: Re-generate.
linespec.h was inculding vec.h, but doesn't expose any VECs.
So, this include can be removed.
ChangeLog
2018-04-05 Tom Tromey <tom@tromey.com>
* linespec.h: Remove include of "vec.h".
This removes VEC(typep) from linespec.c in favor of std::vector. It
also removes the "typep" typedef. This change allowed the removal of
some cleanups.
I believe the previous cleanup code in find_superclass_methods could
result in a memory leak, so this patch is an improvement in that way
as well.
ChangeLog
2018-04-05 Tom Tromey <tom@tromey.com>
* linespec.c (typep): Remove typedef.
(find_methods, find_superclass_methods): Take a std::vector.
(find_method): Use std::vector.
This changes some spots in linespec.c to take a std::vector. This
patch spilled out to objc-lang.c a bit as well. This change allows
for the removal of some cleanups.
ChangeLog
2018-04-05 Tom Tromey <tom@tromey.com>
* utils.c (compare_strings): Remove.
* utils.h (compare_strings): Remove.
* objc-lang.h (find_imps): Update.
* objc-lang.c (find_methods): Take a std::vector.
(uniquify_strings, find_imps): Likewise.
* linespec.c (find_methods): Take a std::vector.
(decode_objc): Use std::vector.
(add_all_symbol_names_from_pspace, find_superclass_methods): Take
a std::vector.
(find_method, find_function_symbols): Use std::vector.
I wanted to use streq with std::unique in another (upcoming) patch in
this seres, so I changed it to return bool. To my surprise, this lead
to regressions. The cause turned out to be that streq was used as an
htab callback -- by casting it to the correct function type. This
sort of cast is invalid, so this patch adds a variant which is
directly suitable for use by htab. (Note that I did not add an
overload, as I could not get that to work with template deduction in
the other patch.)
ChangeLog
2018-04-05 Tom Tromey <tom@tromey.com>
* completer.c (completion_tracker::completion_tracker): Remove
cast.
(completion_tracker::discard_completions): Likewise.
* breakpoint.c (ambiguous_names_p): Remove cast.
* ada-lang.c (_initialize_ada_language): Remove cast.
* utils.h (streq): Update.
(streq_hash): Add new declaration.
* utils.c (streq): Return bool.
(streq_hash): New function.
The use of "const" showed that a string copy in event_location_to_sals
was unnecessary. This patch removes it.
ChangeLog
2018-04-05 Tom Tromey <tom@tromey.com>
* linespec.c (event_location_to_sals) <case ADDRESS_LOCATION>:
Remove a string copy.
This chagnes filter_results to take a std::vector, allowing the
removal of some cleanups in its callers.
ChangeLog
2018-04-05 Tom Tromey <tom@tromey.com>
* linespec.c (filter_results): Use std::vector.
(decode_line_2, decode_line_full): Update.
This changes canonical_to_fullform to return a std::string, and
changes decode_line_2 to use std::vector. This allows for the removal
of some cleanups.
ChangeLog
2018-04-05 Tom Tromey <tom@tromey.com>
* linespec.c (canonical_to_fullform): Return std::string.
(filter_results): Update.
(struct decode_line_2_item): Add constructor.
<fullform, displayform>: Now std::string.
(decode_line_2_compare_items): Now a std::sort comparator.
(decode_line_2): Update.
This changes copy_token_string to return a unique_xmalloc_ptr, which
allows the removal of some cleanups.
ChangeLog
2018-04-05 Tom Tromey <tom@tromey.com>
* linespec.c (copy_token_string): Return a unique_xmalloc_ptr.
(unexpected_linespec_error): Update.
(linespec_parse_basic, parse_linespec): Update.
This removes some leftover comments and fixes the indentation in a
couple of spots in linespec.c.
ChangeLog
2018-04-05 Tom Tromey <tom@tromey.com>
* linespec.c (linespec_parse_basic): Reindent.
This changes struct collect_minsyms to use a std::vector, which
enables the removal of a cleanup from search_minsyms_for_name. This
also changes iterate_over_minimal_symbols to take a
gdb::function_view, which makes a function in linespec.c more
type-safe.
ChangeLog
2018-04-05 Tom Tromey <tom@tromey.com>
* minsyms.h (iterate_over_minimal_symbols): Update.
* minsyms.c (iterate_over_minimal_symbols): Take a
gdb::function_view.
* linespec.c (struct collect_minsyms): Remove.
(compare_msyms): Now a std::sort comparator.
(add_minsym): Add parameters.
(search_minsyms_for_name): Update. Use std::vector.
This changes read_alphacoff_dynamic_symtab to use gdb::byte_vector.
This allows for the removal of some cleanups.
Tested by the buildbot; though I don't know whether this code path is
ever actually run.
gdb/ChangeLog
2018-04-03 Tom Tromey <tom@tromey.com>
* mipsread.c (read_alphacoff_dynamic_symtab): Use
gdb::byte_vector.
The original problem was fixed (see related PR 22242). But using a typedef
as the declared type for a static member variable, as commented in this PR,
is still causing gdb to get into infinite loop when printing the static
member's value. This problem can be reproduced as follows:
% cat t.cc
class A {
typedef A type;
public:
bool operator==(const type& other) { return true; }
static const type INSTANCE;
};
const A A::INSTANCE;
int main() {
A a;
if (a == A::INSTANCE) {
return -1;
}
return 0;
}
% g++ -g t.cc
% gdb -ex "start" -ex "p a" a.out
The fix is rather trivial - in cp_print_static_field(), should call
check_typedef() to get the static member's real type and use it to
check whether it's a struct or an array.
As Simon suggested, I've added a new test case to the testsuite
and am passing the original type, not the real type, as argument
to both cp_print_value_fields() and val_print().
Re-tested on both aarch64-linux-gnu and amd64-linux-gnu. No regressions.
This changes rs6000_ptrace_ldinfo to return a byte_vector. I think
this points out an existing double-free in
rs6000_xfer_shared_libraries.
Tested by the buildbot.
gdb/ChangeLog
2018-04-01 Tom Tromey <tom@tromey.com>
* rs6000-nat.c (rs6000_ptrace_ldinfo): Return a byte_vector.
(rs6000_xfer_shared_libraries): Update.
Now that all instances of VEC(char_ptr) are gone, we can remove the
typedef. There is just one usage left, that is trivial to replace.
Tested by rebuilding on an enable-targets=all build.
gdb/ChangeLog:
* common/gdb_vecs.h (char_ptr): Remove.
* tracepoint.c (encode_actions_1): Remove usage of char_ptr.
This is a straightforward replacement, no change in behavior are
intended/expected.
This is the last usage of VEC(char_ptr), so it can now be removed.
gdb/ChangeLog:
* guile/scm-utils.c (gdbscm_parse_function_args): Replace VEC
with std::vector.
* common/gdb_vecs.h (DEF_VEC_P (char_ptr)): Remove.
This is a straightforward replacement, no change in behavior are
intended/expected.
gdb/gdbserver/ChangeLog:
* tdesc.h (struct target_desc) <features>: Change type to
std::vector<std::string>.
* tdesc.c (target_desc::~target_desc): Adjust to std::vector
changes.
(tdesc_get_features_xml): Likewise.
(tdesc_create_feature): Likewise.
This patch changes the VEC(char_ptr) fields in uploaded_tp to use
std::vector<char *>. At first, I wanted to creep in more changes, like
using std::string, but it was making the patch too big and less focused,
so I decided to keep it to just that.
It also looks like the strings in those vectors are never free'd. If
so, we can fix that in another patch.
gdb/ChangeLog:
* tracepoint.h (struct uploaded_tp): Initialize fields.
<actions, step_actions, cmd_strings>: Change type to
std::vector<char *>.
* tracepoint.c (get_uploaded_tp): Allocate with new.
(free_uploaded_tps): Free with delete.
(parse_tracepoint_definition): Adjust to std::vector change.
* breakpoint.c (read_uploaded_action): Likewise.
(create_tracepoint_from_upload): Likewise.
* ctf.c (ctf_write_uploaded_tp): Likewise.
(SET_ARRAY_FIELD): Likewise.
* tracefile-tfile.c (tfile_write_uploaded_tp): Likewise.
This removes a few cleanups from solib-svr4.c in a straightforward
way.
gdb/ChangeLog
2018-03-30 Tom Tromey <tom@tromey.com>
* solib-svr4.c (lm_info_read): Use gdb::byte_vector. Return
std::unique_ptr.
(svr4_keep_data_in_core): Update.
(svr4_read_so_list): Update.
This changes the out parameter of target_read_string to be a
unique_xmalloc_ptr. This avoids a cleanup and sets the stage for more
cleanup removals.
This patch also removes a seemingly needless alloca from
print_subexp_standard.
gdb/ChangeLog
2018-03-30 Tom Tromey <tom@tromey.com>
* windows-nat.c (handle_output_debug_string, handle_exception):
Update.
* target.h (target_read_string): Update.
* target.c (target_read_string): Change "string" to
unique_xmalloc_ptr.
* solib-svr4.c (open_symbol_file_object, svr4_read_so_list):
Update.
* solib-frv.c (frv_current_sos): Update.
* solib-dsbt.c (dsbt_current_sos): Update.
* solib-darwin.c (darwin_current_sos): Update.
* linux-thread-db.c (inferior_has_bug): Update.
* expprint.c (print_subexp_standard) <case OP_OBJC_MSGCALL>:
Update. Remove alloca.
* ada-lang.c (ada_main_name): Update.
This removes free_dwo_file_cleanup, the last cleanup in dwarf2read.c.
This is replaced with a unique_ptr; which, despite the fact that a
dwo_file is obstack-allocated, seemed like the best fit.
gdb/ChangeLog
2018-03-30 Tom Tromey <tom@tromey.com>
* dwarf2read.c (struct free_dwo_file_cleanup_data): Remove.
(struct dwo_file_deleter): New.
(dwo_file_up): New typedef.
(open_and_init_dwo_file): Use dwo_file_up.
(free_dwo_file_cleanup): Remove.
The objfile parameter to free_dwo_file is unused, so remove it.
gdb/ChangeLog
2018-03-30 Tom Tromey <tom@tromey.com>
* dwarf2read.c (free_dwo_file): Remove "objfile" parameter.
(free_dwo_file_cleanup, free_dwo_file_from_slot): Update.
This changes free_cached_comp_units from a cleanup function to an RAII
class.
gdb/ChangeLog
2018-03-30 Tom Tromey <tom@tromey.com>
* dwarf2read.c (class free_cached_comp_units): New class.
(dw2_instantiate_symtab, dwarf2_build_psymtabs_hard): Use it.
(free_cached_comp_units): Remove function.
This removes make_cleanup_unpush_target, replacing it with a
unique_ptr. This may seem odd, because the object in question is not
actually freed, but unique_ptr provided the necessary functionality.
Tested by the buildbot.
gdb/ChangeLog
2018-03-30 Tom Tromey <tom@tromey.com>
* utils.h (make_cleanup_unpush_target): Remove.
* inf-ptrace.c (struct target_unpusher): New.
(target_unpush_up) New typedef.
(inf_ptrace_create_inferior, inf_ptrace_attach): Use
target_unpush_up.
* utils.c (do_unpush_target, make_cleanup_unpush_target): Remove.
This removes the cleanups from prompt_for_continue by the use of
unique_xmalloc_ptr.
gdb/ChangeLog
2018-03-27 Tom Tromey <tom@tromey.com>
* utils.c (prompt_for_continue): Use unique_xmalloc_ptr.
This removes some cleanups from gdb_readline_wrapper by changing the
existing gdb_readline_wrapper_cleanup struct to have a constructor and
destructor, and then changing gdb_readline_wrapper to simply
instantiate it on the stack.
gdb/ChangeLog
2018-03-27 Pedro Alves <palves@redhat.com>
Tom Tromey <tom@tromey.com>
* top.c (class gdb_readline_wrapper_cleanup): Add constructor,
destructor. Now a class.
(gdb_readline_wrapper_cleanup): Remove function.
(gdb_readline_wrapper): Remove cleanups.
This changes the typedef_hash_table structure to be a C++ class. It
adds constructors and destructors and changes some functions to be
methods of the class. Then it changes the various users of this class
to adapt. This allows for the removal of some cleanups.
Regression tested by the buildbot.
gdb/ChangeLog
2018-03-27 Tom Tromey <tom@tromey.com>
* typeprint.h (struct type_print_options) <local_typedefs,
global_typedefs>: Remove "struct" keyword.
(class typedef_hash_table): New class.
(recursively_update_typedef_hash, add_template_parameters)
(create_typedef_hash, free_typedef_hash, copy_typedef_hash)
(find_typedef_in_hash): Don't declare.
* typeprint.c (struct typedef_hash_table): Move to typeprint.h.
(typedef_hash_table::recursively_update): Rename from
recursively_update_typedef_hash. Now a member.
(typedef_hash_table::add_template_parameters): Rename from
add_template_parameters. Now a member.
(typedef_hash_table::typedef_hash_table): Now a constructor;
rename from create_typedef_hash.
(typedef_hash_table::~typedef_hash_table): Now a destructor;
rename from free_typedef_hash.
(do_free_typedef_hash, make_cleanup_free_typedef_hash)
(do_free_global_table): Remove.
(typedef_hash_table::typedef_hash_table): New constructor; renamed
from copy_type_recursive.
(create_global_typedef_table): Remove.
(typedef_hash_table::find_global_typedef): Now a member of
typedef_hash_table.
(typedef_hash_table::find_typedef): Rename from
find_typedef_in_hash; now a member.
(whatis_exp): Update.
* extension.h (struct ext_lang_type_printers): Add constructor and
destructor.
(start_ext_lang_type_printers, free_ext_lang_type_printers): Don't
declare.
* extension.c (ext_lang_type_printers::ext_lang_type_printers):
Now a constructor; rename from start_ext_lang_type_printers.
(ext_lang_type_printers): Now a destructor; rename from
free_ext_lang_type_printers.
* c-typeprint.c (find_typedef_for_canonicalize, c_print_type_1):
Update.
(c_type_print_base_struct_union): Update. Remove cleanups.
On x86-64 Fedora 26, when building with the system gcc, I get:
../../binutils-gdb/gdb/dwarf-index-write.c: In member function ‘void debug_names::build()’:
../../binutils-gdb/gdb/dwarf-index-write.c:705:13: error: ‘pow’ is not a member of ‘std’
There are actually more messages, but this is sufficient to show the
problem.
The fix is to include <cmath>.
I'm checking this in as obvious. Tested by building.
gdb/ChangeLog
2018-03-27 Tom Tromey <tom@tromey.com>
* dwarf-index-write.c: Include <cmath>.
This is a command we somehow forgot to contribute at the time the Ada
language was first contributed to the FSF. This command allows
the user to change the maximum size we allow when reading memory
from dynamic objects (the default is 65536 bytes).
At the moment, this limit is only used by Ada, and so the implementation
is kept inside ada-lang.c. However, it is conceivable that other language
might want to use it also to handle the same kind of issues; for instance,
this might be useful when handling dynamic types in C. So the name
of the setting was made language-neutral, to allow for this.
Note that an alias for "set var" needs to be introduced as well.
We are not adding a test for that, since this is a feature that is
already exercized by numerous existing tests.
gdb/ChangeLog
* NEWS: Add entry describing new "set|show varsize-limit" command.
* ada-lang.c (_initialize_ada_language): Add "set/show varsize-limit"
command.
* printcmd.c (_initialize_printcmd): Add "set var" alias of
"set variable".
gdb/doc/ChangeLog:
* gdb.texinfo (Ada Settings): New subsubsection.
gdb/testsuite/ChangeLog:
* gdb.ada/varsize_limit: New testcase.
Tested on x86_64-linux.
I want to add a DWARF index-related feature (automatically produce index
files when loading objfiles in GDB), but I don't want to add many
hundred lines to the already too big dwarf2read.c. I thought it would
be a logical split to move everything related to the DWARF index to its
own file.
I first tried to move everything that reads and writes DWARF indices to
a separate file, but found that the "read" part is a little bit
entangled with the rest of dwarf2read.c, so the line is hard to draw
about where to split. The write part is quite isolated though, so I
moved this part to a new file, dwarf-index-write.c. Some things are
necessary to both reading and writing indices, so I placed them in
dwarf-index-common.{c,h}. The idea would be to have a
dwarf-index-read.c eventually that would use it too (for now that code
is still in dwarf2read.c).
This required moving some things to a new dwarf2read.h header, so they
can be read by the code that writes the index.
The patch is big in number of lines, but it's all existing code being
moved around. The only changes are that some functions are not static
anymore, a declaration is added in a .h file, and therefore the comment
is moved there.
I built-tested it with a little and big endian target.
This patch is also available on the users/simark/split-dwarf2read
branch.
gdb/ChangeLog:
* Makefile.in (COMMON_SFILES): Add dwarf-index-common.c and
dwarf-index-write.c
(HFILES_NO_SRCDIR): Add dwarf-index-common.h and dwarf2read.h.
* dwarf-index-common.c: New file.
* dwarf-index-common.h: New file.
* dwarf-index-write.c: New file.
* dwarf2read.c: Include dwarf2read.h and dwarf-index-common.h.
(struct dwarf2_section_info): Move from here.
(dwarf2_section_info_def): Likewise.
(DEF_VEC_O (dwarf2_section_info_def)): Likewise.
(offset_type): Likewise.
(DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE): Likewise.
(DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE): Likewise.
(DW2_GDB_INDEX_CU_SET_VALUE): Likewise.
(byte_swap): Likewise.
(MAYBE_SWAP): Likewise.
(dwarf2_per_cu_ptr): Likewise.
(DEF_VEC_P (dwarf2_per_cu_ptr)): Likewise.
(struct tu_stats): Likewise.
(struct dwarf2_per_objfile): Likewise.
(struct dwarf2_per_cu_data): Likewise.
(struct signatured_type): Likewise.
(sig_type_ptr): Likewise.
(DEF_VEC_P (sig_type_ptr)): Likewise.
(INDEX4_SUFFIX): Likewise.
(INDEX5_SUFFIX): Likewise.
(DEBUG_STR_SUFFIX): Likewise.
(dwarf2_read_section): Make non-static.
(mapped_index_string_hash): Move from here.
(dwarf5_djb_hash): Likewise.
(file_write): Likewise.
(class data_buf): Likewise.
(struct symtab_index_entry): Likewise.
(struct mapped_symtab): Likewise.
(find_slot): Likewise.
(hash_expand): Likewise.
(add_index_entry): Likewise.
(uniquify_cu_indices): Likewise.
(class c_str_view): Likewise.
(class c_str_view_hasher): Likewise.
(class vector_hasher): Likewise.
(write_hash_table): Likewise.
(psym_index_map): Likewise.
(struct addrmap_index_data): Likewise.
(add_address_entry): Likewise.
(add_address_entry_worker): Likewise.
(write_address_map): Likewise.
(symbol_kind): Likewise.
(write_psymbols): Likewise.
(struct signatured_type_index_data): Likewise.
(write_one_signatured_type): Likewise.
(recursively_count_psymbols): Likewise.
(recursively_write_psymbols): Likewise.
(class debug_names): Likewise.
(check_dwarf64_offsets): Likewise.
(psyms_seen_size): Likewise.
(write_gdbindex): Likewise.
(write_debug_names): Likewise.
(assert_file_size): Likewise.
(write_psymtabs_to_index): Likewise.
(save_gdb_index_command): Likewise.
(_initialize_dwarf2_read): Don't register the "save gdb-index"
command.
* dwarf2read.h: New file.
This patch fixes a known failure in gdb.ada/maint_with_ada.exp
(maintenance check-psymtabs). Another way to witness the same
issue is by considering the following Ada declarations...
type Wrapper is record
A : Integer;
end record;
u00045 : constant Wrapper := (A => 16#060287af#);
pragma Export (C, u00045, "symada__cS");
... which declares a variable name "u00045" but with a linkage
name which is "symada__cS". This variable is a record with one
component, the Ada equivalent of a struct with one field in C.
Trying to print that variable's value currently yields:
(gdb) p /x <symada__cS>
'symada(char, signed)' has unknown type; cast it to its declared type
This indicates that GDB was only able to find the minimal symbol,
but not the full symbol. The expected output is:
(gdb) print /x <symada__cS>
$1 = (a => 0x60287af)
The error message gives a hint about what's happening: We processed
the symbol through gdb_demangle, which in the case of this particular
symbol name, ends up matching the C++ naming scheme. As a result,
the demangler transforms our symbol name into 'symada(char, signed)',
thus breaking Ada lookups.
This patch fixes the issue by first introducing a new language_defn
attribute called la_store_sym_names_in_linkage_form_p, which is a boolean
to be set to true for the few languages that do not want their symbols
to have their names stored in demangled form, and false otherwise.
We then use this language attribute to skip the call to gdb_demangle
for all languages whose la_store_sym_names_in_linkage_form_p is true.
In terms of the selection of languages for which the new attribute
is set to true, the selection errs on the side of preserving the
existing behavior, and only changes the behavior for the languages
where we are certain storing symbol names in demangling form is not
needed. It is conceivable that other languages might be in the same
situation, but I not knowing in detail the symbol name enconding
strategy, I decided to play it safe and let other language maintainers
potentially adjust their language if it makes sense to do so.
gdb/ChangeLog:
PR gdb/22670
* dwarf2read.c (dwarf2_physname): Do not return the demangled
symbol name if the CU's language stores symbol names in linkage
format.
* language.h (struct language_defn)
<la_store_sym_names_in_linkage_form_p>: New field. Adjust
all instances of this struct.
gdb/testsuite/ChangeLog:
* gdb.ada/maint_with_ada.exp: Remove PR gdb/22670 setup_kfail.
* gdb.ada/notcplusplus: New testcase.
* gdb.base/c-linkage-name.c: New file.
* gdb.base/c-linkage-name.exp: New testcase.
Tested on x86_64-linux.
This also passes AdaCore's internal GDB testsuite.
In https://sourceware.org/ml/gdb-patches/2017-06/msg00741.html,
Pedro asks:
> Doesn't the "info verbose on" bit affect frame filters too?
The answer is that yes, it could. However, it's not completely
effective, because the C code can't guess how many frames might need
to be unwound to satisfy the request -- a frame filter will request as
many frames as it needs.
Also, I tried removing this code from backtrace, and I think the
result is better without it. In particular, now the expansion line
occurs just before the frame that caused the expansion, like:
(gdb) bt no-filters
#0 0x00007ffff576cecd in poll () from /lib64/libc.so.6
Reading in symbols for ../../binutils-gdb/gdb/event-loop.c...done.
#1 0x00000000007ecc33 in gdb_wait_for_event (block=1)
at ../../binutils-gdb/gdb/event-loop.c:772
#2 0x00000000007ec006 in gdb_do_one_event ()
at ../../binutils-gdb/gdb/event-loop.c:347
#3 0x00000000007ec03e in start_event_loop ()
at ../../binutils-gdb/gdb/event-loop.c:371
Reading in symbols for ../../binutils-gdb/gdb/main.c...done.
#4 0x000000000086693d in captured_command_loop (
Reading in symbols for ../../binutils-gdb/gdb/exceptions.c...done.
data=0x0) at ../../binutils-gdb/gdb/main.c:325
So, I am proposing this patch to simply remove this code.
gdb/ChangeLog
2018-03-26 Tom Tromey <tom@tromey.com>
* stack.c (backtrace_command_1): Remove verbose code.
This patch changes py-framefilter.c as suggested by Pedro in:
https://sourceware.org/ml/gdb-patches/2017-06/msg00748.html
In particular, gdb exceptions are now caught at the outermost layer,
rather than in each particular function. This simplifies much of the
code.
gdb/ChangeLog
2018-03-26 Tom Tromey <tom@tromey.com>
* python/py-framefilter.c (py_print_type): Don't catch
exceptions. Return void.
(py_print_value): Likewise.
(py_print_single_arg): Likewise.
(enumerate_args): Don't catch exceptions.
(py_print_args): Likewise.
(py_print_frame): Likewise.
(gdbpy_apply_frame_filter): Catch exceptions here.
This improves help text in stack.c in two ways. First, it removes
trailing newlines from various help strings. I think these are never
needed. Second, it adds a "Usage" line to the "backtrace" text, as
suggested by Pedro.
gdb/ChangeLog
2018-03-26 Tom Tromey <tom@tromey.com>
* stack.c (_initialize_stack): Remove trailing newlines from help
text. Add "Usage" line to "backtrace" help.
PR python/16486 notes that "bt" output is still wrapped differently
when a frame filter is in use. This patch brings it a bit closer by
adding one more wrap_hint call, in a place where stack.c does this as
well.
gdb/ChangeLog
2018-03-26 Tom Tromey <tom@tromey.com>
PR python/16486:
* python/py-framefilter.c (py_print_args): Call wrap_hint.
Tom Tromey
Simon Marchi
Weimin Pan
Joel Brobecker
Simon Marchi