PR c++/16253.
symbol_matches_domain was permitting searches for a VAR_DOMAIN
symbol to also match STRUCT_DOMAIN symbols for languages like C++
where STRUCT_DOMAIN symbols also define a typedef of the same name,
e.g., "struct foo {}" introduces a typedef of the name "foo".
Problems occur if there exists both a VAR_DOMAIN and STRUCT_DOMAIN
symbol of the same name. Then it is essentially a race between which
symbol is found first. The other symbol is obscurred.
[This is a relatively common idiom: enum e { ... } e;]
This patchset moves this "language defines a typedef" logic to
lookup_symbol[_in_language], looking first for a symbol in the given
domain and falling back to searching STRUCT_DOMAIN when/if appropriate.
2014-04-14 Keith Seitz <keiths@redhat.com>
PR c++/16253
* ada-lang.c (ada_symbol_matches_domain): Moved here and renamed
from symbol_matches_domain in symtab.c. All local callers
of symbol_matches_domain updated.
(standard_lookup): If DOMAIN is VAR_DOMAIN and no symbol is found,
search STRUCT_DOMAIN.
(ada_find_any_type_symbol): Do not search STRUCT_DOMAIN
independently. standard_lookup will do that automatically.
* cp-namespace.c (cp_lookup_symbol_nonlocal): Explain when/why
VAR_DOMAIN searches may return a STRUCT_DOMAIN match.
(cp_lookup_symbol_in_namespace): Likewise.
If no VAR_DOMAIN symbol is found, search STRUCT_DOMAIN.
(cp_lookup_symbol_exports): Explain when/why VAR_DOMAIN searches
may return a STRUCT_DOMAIN match.
(lookup_symbol_file): Search for the class name in STRUCT_DOMAIN.
* cp-support.c: Include language.h.
(inspect_type): Explicitly search STRUCT_DOMAIN before searching
VAR_DOMAIN.
* psymtab.c (match_partial_symbol): Compare the requested
domain with the symbol's domain directly.
(lookup_partial_symbol): Likewise.
* symtab.c (lookup_symbol_in_language): Explain when/why
VAR_DOMAIN searches may return a STRUCT_DOMAIN match.
If no VAR_DOMAIN symbol is found, search STRUCT_DOMAIN for
appropriate languages.
(symbol_matches_domain): Renamed `ada_symbol_matches_domain'
and moved to ada-lang.c
(lookup_block_symbol): Explain that this function only returns
symbol matching the requested DOMAIN.
Compare the requested domain with the symbol's domain directly.
(iterate_over_symbols): Compare the requested domain with the
symbol's domain directly.
* symtab.h (symbol_matches_domain): Remove.
2014-04-14 Keith Seitz <keiths@redhat.com>
PR c++/16253
* gdb.cp/var-tag.cc: New file.
* gdb.cp/var-tag.exp: New file.
* gdb.dwarf2/dw2-ada-ffffffff.exp: Set the language to C++.
* gdb.dwarf2/dw2-anon-mptr.exp: Likewise.
* gdb.dwarf2/dw2-double-set-die-type.exp: Likewise.
* gdb.dwarf2/dw2-inheritance.exp: Likewise.
Constructing a value based on a type and address might change the type
of the newly constructed value. Thus re-fetch type via value_type to ensure
we have the correct type at hand.
gdb/ChangeLog
* ada-lang.c (ada_value_primitive_packed_val): Re-fetch type from value.
(ada_template_to_fixed_record_type_1): Likewise.
(ada_to_fixed_type_1): Likewise.
* cp-valprint.c (cp_print_value_fields_rtti): Likewise.
(cp_print_value): Likewise.
* d-valprint.c (dynamic_array_type): Likewise.
* findvar.c (address_of_variable): Likewise.
* jv-valprint.c (java_value_print): Likewise.
* valops.c (value_ind): Likewise.
* value.c (coerce_ref): Likewise.
This reverts the following patch series, as they cause some regresssions.
commit 37c1ab67a3
type: add c99 variable length array support
gdb/
* dwarf2loc.c (dwarf2_locexpr_baton_eval): New function.
(dwarf2_evaluate_property): New function.
* dwarf2loc.h (dwarf2_evaluate_property): New function prototype.
* dwarf2read.c (attr_to_dynamic_prop): New function.
(read_subrange_type): Use attr_to_dynamic_prop to read high bound
attribute.
* gdbtypes.c: Include dwarf2loc.h.
(is_dynamic_type): New function.
(resolve_dynamic_type): New function.
(resolve_dynamic_bounds): New function.
(get_type_length): New function.
(check_typedef): Use get_type_length to compute type length.
* gdbtypes.h (TYPE_HIGH_BOUND_KIND): New macro.
(TYPE_LOW_BOUND_KIND): New macro.
(is_dynamic_type): New function prototype.
* value.c (value_from_contents_and_address): Call resolve_dynamic_type
to resolve dynamic properties of the type. Update comment.
* valops.c (get_value_at, value_at, value_at_lazy): Update comment.
commit 26cb189f8b
vla: enable sizeof operator to work with variable length arrays
gdb/
* eval.c (evaluate_subexp_for_sizeof) <OP_VAR_VALUE>: If the type
passed to sizeof is dynamic evaluate the argument to compute the length.
commit 04b19544ef
vla: enable sizeof operator for indirection
gdb/
* eval.c (evaluate_subexp_for_sizeof) <UNOP_IND>: Create an indirect
value and retrieve the dynamic type size.
commit bcd629a44f
vla: update type from newly created value
gdb/
* ada-lang.c (ada_value_primitive_packed_val): Re-fetch type from value.
(ada_template_to_fixed_record_type_1): Likewise.
(ada_to_fixed_type_1): Likewise.
* cp-valprint.c (cp_print_value_fields_rtti): Likewise.
(cp_print_value): Likewise.
* d-valprint.c (dynamic_array_type): Likewise.
* eval.c (evaluate_subexp_with_coercion): Likewise.
* findvar.c (address_of_variable): Likewise.
* jv-valprint.c (java_value_print): Likewise.
* valops.c (value_ind): Likewise.
* value.c (coerce_ref): Likewise.
commit b86138fb04
vla: print "variable length" for unresolved dynamic bounds
gdb/
* c-typeprint.c (c_type_print_varspec_suffix): Added
check for not yet resolved high bound. If unresolved, print
"variable length" string to the console instead of random
length.
commit e1969afbd4
vla: support for DW_AT_count
gdb/
* dwarf2read.c (read_subrange_type): Convert DW_AT_count to a dynamic
property and store it as the high bound and flag the range accordingly.
* gdbtypes.c (resolve_dynamic_bounds): If range is flagged as
RANGE_UPPER_BOUND_IS_COUNT assign low + high - 1 as the new high bound.
* gdbtypes.h (enum range_flags): New enum.
(struct range_bounds): Add flags member.
commit 92b09522dc
vla: resolve dynamic bounds if value contents is a constant byte-sequence
gdb/
* findvar.c (default_read_var_value): Resolve dynamic bounds if location
points to a constant blob.
commit 3bce82377f
vla: evaluate operand of sizeof if its type is a vla
gdb/
* eval.c (evaluate_subexp_for_sizeof): Add enum noside argument.
(evaluate_subexp_standard): Pass noside argument.
(evaluate_subexp_for_sizeof) <BINOP_SUBSCRIPT>: Handle subscript case
if noside equals EVAL_NORMAL. If the subscript yields a vla type
re-evaluate subscript operation with EVAL_NORMAL to enable sideffects.
* gdbtypes.c (resolve_dynamic_bounds): Mark bound as evaluated.
* gdbtypes.h (enum range_flags): Add RANGE_EVALUATED case.
gdb/testsuite
* gdb.base/vla-sideeffect.c: New file.
* gdb.base/vla-sideeffect.exp: New file.
commit 504f34326e
test: cover subranges with present DW_AT_count attribute
gdb/testsuite/
* gdb.dwarf2/count.exp: New file.
commit 1a237e0ee5
test: multi-dimensional c99 vla.
gdb/testsuite/
* gdb.base/vla-multi.c: New file.
* gdb.base/vla-multi.exp: New file.
commit 024e13b46f
test: evaluate pointers to C99 vla correctly.
gdb/testsuite/
* gdb.base/vla-ptr.c: New file.
* gdb.base/vla-ptr.exp: New file.
commit c8655f75e2
test: basic c99 vla tests for C primitives
gdb/testsuite/
* gdb.base/vla-datatypes.c: New file.
* gdb.base/vla-datatypes.exp: New file.
commit 58a84dcf29
test: add mi vla test
gdb/testsuite/
* gdb.mi/mi-vla-c99.exp: New file.
* gdb.mi/vla.c: New file.
Constructing a value based on a type and address might change the type
of the newly constructed value. Thus re-fetch type via value_type to ensure
we have the correct type at hand.
* ada-lang.c (ada_value_primitive_packed_val): Re-fetch type from value.
(ada_template_to_fixed_record_type_1): Likewise.
(ada_to_fixed_type_1): Likewise.
* cp-valprint.c (cp_print_value_fields_rtti): Likewise.
(cp_print_value): Likewise.
* d-valprint.c (dynamic_array_type): Likewise.
* eval.c (evaluate_subexp_with_coercion): Likewise.
* findvar.c (address_of_variable): Likewise.
* jv-valprint.c (java_value_print): Likewise.
* valops.c (value_ind): Likewise.
* value.c (coerce_ref): Likewise.
* gdbtypes.c (create_static_range_type): Renamed from create_range_type.
* gdbtypes.h (create_static_range_type): Renamed from create_range_type.
* ada-lang.c: All uses of create_range_type updated.
* coffread.c: All uses of create_range_type updated.
* dwarf2read.c: All uses of create_range_type updated.
* f-exp.y: All uses of create_range_type updated.
* m2-valprint.c: All uses of create_range_type updated.
* mdebugread.c: All uses of create_range_type updated.
* stabsread.c: All uses of create_range_type updated.
* valops.c: All uses of create_range_type updated.
* valprint.c: All uses of create_range_type updated.
Consider the following declarations:
type Packed_Array is array (Natural range <>) of Boolean;
pragma Pack (Packed_Array);
function Make (H, L : Natural) return Packed_Array is
begin
return (H .. L => False);
end Make;
A1 : Packed_Array := Make (1, 2);
A2 : Packed_Array renames A1;
One possible DWARF translation for A2 is:
<3><1e4>: Abbrev Number: 21 (DW_TAG_variable)
<1e5> DW_AT_name : a2
<1ea> DW_AT_type : <0x1d9>
<3><1d9>: Abbrev Number: 22 (DW_TAG_const_type)
<1da> DW_AT_type : <0x1de>
<3><1de>: Abbrev Number: 23 (DW_TAG_reference_type)
<1e0> DW_AT_type : <0x1a3>
<3><1a3>: Abbrev Number: 17 (DW_TAG_array_type)
<1a4> DW_AT_name : foo__Ta1S___XP1
<1a8> DW_AT_GNAT_descriptive_type: <0x16b>
<3><16b>: Abbrev Number: 6 (DW_TAG_typedef)
<16c> DW_AT_name : foo__Ta1S
<172> DW_AT_type : <0x176>
<3><176>: Abbrev Number: 17 (DW_TAG_array_type)
<177> DW_AT_name : foo__Ta1S
<17b> DW_AT_GNAT_descriptive_type: <0x223>
Here, foo__Ta1S___XP1 is the type used for the code generation while
foo__Ta1S is the source-level type. Both form a valid GNAT encoding for
a packed array type.
Trying to print A2 (1) can make GDB crash. This is because A2 is defined
as a reference to a GNAT encoding for a packed array. When decoding
constrained packed arrays, the ada_coerce_ref subprogram follows
references and returns a fixed type from the target type, peeling
the GNAT encoding for packed arrays. The remaining code assumes that
the resulting type is still such an encoding while we only have
a standard GDB array type, hence the crash:
arr = ada_coerce_ref (arr);
[...]
type = decode_constrained_packed_array_type (value_type (arr));
decode_constrained_packed_array_type assumes that its argument is
such an encoding. From its front comment:
/* The array type encoded by TYPE, where
ada_is_constrained_packed_array_type (TYPE). */
This patch simply replaces the call to ada_coerce_ref with a call
to coerce_ref in order to avoid prematurely transforming
the packed array type as a side-effect. This way, the remaining code
will always work with a GNAT encoding.
gdb/ChangeLog:
* ada-lang.c (decode_constrained_packed_array): Perform a
minimal coercion for reference with coerce_ref instead of
ada_coerce_ref.
When evaluating an expression, if it is of a tagged type, GDB reads
the tag in memory and deduces the full view. At parsing time, however,
this operation is done only in the case of OP_VAR_VALUE. ptype does
not go through a full evaluation of expressions so it may return some
odd results:
(gdb) print c.menu_name
$1 = 0x0
(gdb) ptype $
type = system.strings.string_access
(gdb) ptype c.menu_name
type = <void>
This change removes this peculiarity by extending the tag resolution
to UNOP_IND and STRUCTOP_STRUCT. As in the case of OP_VAR_VALUE, this
implies switching from EVAL_AVOID_SIDE_EFFECTS to EVAL_NORMAL when a
tagged type is dereferenced.
gdb/
* ada-lang.c (ada_evaluate_subexp): Resolve tagged types to
full view in the case of UNOP_IND and STRUCTOP_STRUCT.
gdb/testsuite/
* gdb.ada/tagged_access: New testcase.
This patch moves the Ada symbol cache to per-program-space data.
gdb/ChangeLog:
* ada-lang.c (struct cache_entry, HASH_SIZE): Move definition up.
(struct ada_symbol_cache): New.
(ada_free_symbol_cache): Forward declare.
(struct ada_pspace_data): New.
(ada_pspace_data_handle): New static global.
(get_ada_pspace_data, ada_pspace_data_cleanup)
(ada_init_symbol_cache, ada_free_symbol_cache): New functions.
(cache_space, cache): Delete, now folded inside struct
ada_pspace_data.
(ada_get_symbol_cache): New function.
(ada_clear_symbol_cache, find_entry, cache_symbol): Adjust
implementation.
(_initialize_ada_language): Remove initialization of cache_space.
Move call to observer_attach_inferior_exit up, grouping it
with the other observer registrations inside this function.
Rename command to be more general. Add call to
register_program_space_data_with_cleanup.
Consider the following code:
type Color is (Black, Red, Green, Blue, White);
type Primary_Table is array (Color range Red .. Blue) of Boolean;
Prim : Primary_Table := (True, False, False);
GDB prints the length of arrays in a fairly odd way:
(gdb) p prim'length
$2 = blue
The length returned should be an integer, not the array index type,
and this patch fixes this.
gdb/ChangeLog:
* ada-lang.c (ada_evaluate_subexp): Set the type of the value
returned by the 'Length attribute to integer.
testsuite/ChangeLog:
* gdb.ada/tick_length_array_enum_idx: New testcase.
This bit was meant to be merged with the following patch:
commit 3d9434b5dd
Subject: [Ada] Add a symbol lookup cache
... but I forgot :-(. This causes the cache to be undefined, and
with a bit of (bad) luck:
% gdb
(gdb) set lang ada
(gdb) set $xxx := 1
[SEGV]
gdb/ChangeLog:
* ada-lang.c (_initialize_ada_language): Initialize
cache_space obstack.
This patch implements the caching mechanism alluded to in a comment
next to some stubbed functions.
gdb/ChangeLog:
* ada-lang.c (HASH_SIZE): New macro.
(struct cache_entry): New type.
(cache_space, cache): New static globals.
(ada_clear_symbol_cache, find_entry): New functions.
(lookup_cached_symbol, cache_symbol): Implement.
(ada_new_objfile_observer, ada_free_objfile_observer): New.
(_initialize_ada_language): Attach ada_new_objfile_observer
and ada_free_objfile_observer.
This patch series constifies a number of struct block * parameters.
gdb/ChangeLog:
* ada-lang.c (ada_add_block_symbols, add_defn_to_vec)
(lookup_cached_symbol, ada_add_local_symbols): Add "const" to
struct block * parameter.
(ada_lookup_symbol_list_worker): Constify local variable "block".
Remove cast which is no longer necessary.
Currently, Ada debugging requires the use of certain GNAT-specific
encodings, which are generated by the compiler. These encodings
were created a long time ago to work around the fairly limited
capabilities of the stabs debugging format. With DWARF, the vast
majority of the encodings could be abandoned in favor of a pure
DWARF approach.
In order to make it easier to evaluate the quality of the DWARF
debugging information generated by the compiler, and how the debugger
handles it, we are introducing a small Ada-specific maintenance
setting which changes the debugger's behavior to ignore descriptive
types. Descriptive types are artificial types generated by the
compiler purely to give the debugger hints as to how to properly
decode certain properties of a type. For instance, for array
types, it generates a parallel type whose name is the name of
the array suffixed with ___XA, whose contents tells us what
the array's index type is, and possibly its bounds. See GCC's
gcc/ada/exp_dbug.ads for the full description of all encodings.
This is only a first step, as this setting does not deactivate
all encodings; More settings dedicated to each type of encoding
will likely be implemented in the future, as we make progress.
gdb/ChangeLog:
* ada-lang.c (maint_set_ada_cmdlist, maint_show_ada_cmdlist):
New static globals.
(maint_set_ada_cmd, maint_show_ada_cmd): New functions.
(ada_ignore_descriptive_types_p): New static global.
(find_parallel_type_by_descriptive_type): Return immediately
if ada_ignore_descriptive_types_p is set.
(_initialize_ada_language): Register new commands "maintenance
set ada", "maintenance show ada", "maintenance set ada
ignore-descriptive-types" and "maintenance show ada
ignore-descriptive-types".
* NEWS: Add entry for new "maint ada set/show
ignore-descriptive-types" commands.
gdb/doc/ChangeLog:
* gdb.texinfo (Ada Glitches): Document the new "maint ada set/show
ignore-descriptive-types". commands.
Currently, ada-lang.c pretends to include "ui-out.h" as follow:
#ifdef UI_OUT
#include "ui-out.h"
#endif
However, UI_OUT is never defined as far as I can tell. This is confirmed
by rebuilding with a #error pragma inside the #ifdef UI_OUT block,
which never triggers.
Since this unit makes references to declarations from ui-out.h,
this patch simply removes the #ifdef/#endif condition. This has not
been an error so far because "ui-out.h" indirectly gets included,
via one of the other .h files being included.
gdb/ChangeLog:
* ada-lang.c: Remove "#ifdef UI_OUT" condition for including
"ui-out.h".
This last patch removes "partial" from the names of
expand_partial_symbol_names and map_partial_symbol_filenames.
It also renames expand_partial_symbol_names to match the
struct quick_symbol_functions "method" that it wraps:
expand_symtabs_matching.
This patch also adds two parameters to expand_symtabs_matching
so that it can fully wrap the underlying quick_symbol_functions method.
This makes it usable in more places.
I thought of having a cover function that still had the same
signature as the old expand_partial_symbol_names function,
but I couldn't think of a good name, and it wasn't clear it was
worth it anyway.
* symfile.h (expand_symtabs_matching): Renamed from
expand_partial_symbol_names. Update prototype.
(map_symbol_filenames): Renamed from map_partial_symbol_filenames.
* symfile.c (expand_symtabs_matching): Renamed from
expand_partial_symbol_names. New args file_matcher, kind.
Rename arg fun to symbol_matcher.
(map_symbol_filenames): Renamed from map_partial_symbol_filenames.
* ada-lang.c (ada_complete_symbol_matcher): Renamed from
ada_expand_partial_symbol_name.
(ada_make_symbol_completion_list): Update to call
expand_symtabs_matching.
(ada_add_global_exceptions): Call expand_symtabs_matching.
* mi/mi-cmd-file.c (mi_cmd_file_list_exec_source_files): Update to
call map_symbol_filenames.
* symtab.c (sources_info): Update to call map_symbol_filenames.
(search_symbols): Call expand_symtabs_matching.
(symbol_completion_matcher): Renamed from expand_partial_symbol_name.
(default_make_symbol_completion_list_break_on): Update to call
expand_symtabs_matching.
(make_source_files_completion_list): Update to call
map_symbol_filenames.
This function has the following code:
elt_type = type;
for (i = n; i > 1; i--)
elt_type = TYPE_TARGET_TYPE (type);
For multi-dimension arrays, the code above tries to find the array
type corresponding to the dimension we're trying to inspect.
The problem is that, past the second dimension, the loop does
nothing other than repeat the first iteration. There is a little
thinko where it got the TYPE_TARGET_TYPE of TYPE instead of ELT_TYPE!
To my surprise, I was unable to produce an Ada exemple that demonstrated
the problem. That's because the examples I created all trigger a parallel
___XA type which we then use in place of the ELT_TYPE in order to
determine the bounds - see the code that immediately follows our
loop above:
index_type_desc = ada_find_parallel_type (type, "___XA");
ada_fixup_array_indexes_type (index_type_desc);
if (index_type_desc != NULL)
[...]
So, in order to avoid depending on an Ada example where the compiler
can potentially decide one way or the other, I decided to use an
artificial example, written in C. With ...
int multi[1][2][3];
... forcing the language to Ada, and trying to print the 'last,
we get:
(gdb) p multi'last(1)
$1 = 0
(gdb) p multi'last(2)
$2 = 1
(gdb) p multi'last(3)
$3 = 1 <<<--- This should be 2!
Additionally, I noticed that a couple of check_typedef's were missing.
This patch adds them. And since the variable in question only gets
used within an "else" block, I moved the variable declaration and
use inside that block - making it clear what the scope of the variable
is.
gdb/ChangeLog:
* ada-lang.c (ada_array_bound_from_type): Move the declaration
and assignment of variable "elt_type" inside the else block
where it is used. Add two missing check_typedef calls.
Fix bug where we got TYPE's TYPE_TARGET_TYPE, where in fact
we really wanted to get ELT_TYPE's TYPE_TARGET_TYPE.
gdb/testsuite/ChangeLog:
* gdb.ada/arraydim: New testcase.
With a program raising an exception, trying to debug that program
in GDB/MI mode can yield a crash:
% gdb -i=mi foo
(gdb)
-catch-exception -e "Program_Error"
^done,bkptno="2",bkpt={number="2",type="breakpoint",[...]
(gdb)
-exec-continue
^running
*running,thread-id="all"
(gdb)
=library-loaded,id=[...]
&"warning: failed to reevaluate internal exception condition for catchpoint 2: Error in expression, near `'.\n"
zsh: 22956 bus error (core dumped) gdb -q -i=mi foo
The problem is triggered by a problem in the compiler which causes
EXP in the following TRY_CATCH block to change unexpectedly when
parse_exp_1 throws an error :
| TRY_CATCH (e, RETURN_MASK_ERROR)
| {
| exp = parse_exp_1 (&s, bl->address,
| block_for_pc (bl->address), 0);
| }
In ada-lang.c:create_excep_cond_exprs, EXP is initialized to NULL,
and is expected to remain NULL if parse_exp_1 throws. Instead,
its value gets changed to something invalid. This later crashes
the debugger, when trying to evaluate the bogus expression.
This patch works around the issue by simply forcing EXP back to NULL
when an exception was thrown. A comment explaining why, and the sort
of timeline we're looking at for a fix, is also added.
gdb/ChangeLog:
* ada-lang.c (create_excep_cond_exprs): Force EXP to NULL
when parse_exp_1 threw an error. Add comment.
This patch is purely mechanical. It removes gdb_stat.h and changes
the code to use sys/stat.h.
2013-11-18 Tom Tromey <tromey@redhat.com>
* common/gdb_stat.h: Remove.
* ada-lang.c: Use sys/stat.h, not gdb_stat.h.
* common/filestuff.c: Use sys/stat.h, not gdb_stat.h.
* common/linux-osdata.c: Use sys/stat.h, not gdb_stat.h.
* corefile.c: Use sys/stat.h, not gdb_stat.h.
* ctf.c: Use sys/stat.h, not gdb_stat.h.
* darwin-nat.c: Use sys/stat.h, not gdb_stat.h.
* dbxread.c: Use sys/stat.h, not gdb_stat.h.
* dwarf2read.c: Use sys/stat.h, not gdb_stat.h.
* exec.c: Use sys/stat.h, not gdb_stat.h.
* gdbserver/linux-low.c: Use sys/stat.h, not gdb_stat.h.
* gdbserver/remote-utils.c: Use sys/stat.h, not gdb_stat.h.
* inf-child.c: Use sys/stat.h, not gdb_stat.h.
* jit.c: Use sys/stat.h, not gdb_stat.h.
* linux-nat.c: Use sys/stat.h, not gdb_stat.h.
* m68klinux-nat.c: Use sys/stat.h, not gdb_stat.h.
* main.c: Use sys/stat.h, not gdb_stat.h.
* mdebugread.c: Use sys/stat.h, not gdb_stat.h.
* mi/mi-cmd-env.c: Use sys/stat.h, not gdb_stat.h.
* nto-tdep.c: Use sys/stat.h, not gdb_stat.h.
* objfiles.c: Use sys/stat.h, not gdb_stat.h.
* procfs.c: Use sys/stat.h, not gdb_stat.h.
* remote-fileio.c: Use sys/stat.h, not gdb_stat.h.
* remote-mips.c: Use sys/stat.h, not gdb_stat.h.
* remote.c: Use sys/stat.h, not gdb_stat.h.
* rs6000-nat.c: Use sys/stat.h, not gdb_stat.h.
* sol-thread.c: Use sys/stat.h, not gdb_stat.h.
* solib-spu.c: Use sys/stat.h, not gdb_stat.h.
* source.c: Use sys/stat.h, not gdb_stat.h.
* symfile.c: Use sys/stat.h, not gdb_stat.h.
* symmisc.c: Use sys/stat.h, not gdb_stat.h.
* symtab.c: Use sys/stat.h, not gdb_stat.h.
* top.c: Use sys/stat.h, not gdb_stat.h.
* xcoffread.c: Use sys/stat.h, not gdb_stat.h.
This removes gdb_string.h. This patch is purely mechanical. I
created it by running the two commands:
git rm common/gdb_string.h
perl -pi -e's/"gdb_string.h"/<string.h>/;' *.[chyl] */*.[chyl]
2013-11-18 Tom Tromey <tromey@redhat.com>
* common/gdb_string.h: Remove.
* aarch64-tdep.c: Use string.h, not gdb_string.h.
* ada-exp.y: Use string.h, not gdb_string.h.
* ada-lang.c: Use string.h, not gdb_string.h.
* ada-lex.l: Use string.h, not gdb_string.h.
* ada-typeprint.c: Use string.h, not gdb_string.h.
* ada-valprint.c: Use string.h, not gdb_string.h.
* aix-thread.c: Use string.h, not gdb_string.h.
* alpha-linux-tdep.c: Use string.h, not gdb_string.h.
* alpha-mdebug-tdep.c: Use string.h, not gdb_string.h.
* alpha-nat.c: Use string.h, not gdb_string.h.
* alpha-osf1-tdep.c: Use string.h, not gdb_string.h.
* alpha-tdep.c: Use string.h, not gdb_string.h.
* alphanbsd-tdep.c: Use string.h, not gdb_string.h.
* amd64-dicos-tdep.c: Use string.h, not gdb_string.h.
* amd64-linux-nat.c: Use string.h, not gdb_string.h.
* amd64-linux-tdep.c: Use string.h, not gdb_string.h.
* amd64-nat.c: Use string.h, not gdb_string.h.
* amd64-sol2-tdep.c: Use string.h, not gdb_string.h.
* amd64fbsd-tdep.c: Use string.h, not gdb_string.h.
* amd64obsd-tdep.c: Use string.h, not gdb_string.h.
* arch-utils.c: Use string.h, not gdb_string.h.
* arm-linux-nat.c: Use string.h, not gdb_string.h.
* arm-linux-tdep.c: Use string.h, not gdb_string.h.
* arm-tdep.c: Use string.h, not gdb_string.h.
* arm-wince-tdep.c: Use string.h, not gdb_string.h.
* armbsd-tdep.c: Use string.h, not gdb_string.h.
* armnbsd-nat.c: Use string.h, not gdb_string.h.
* armnbsd-tdep.c: Use string.h, not gdb_string.h.
* armobsd-tdep.c: Use string.h, not gdb_string.h.
* avr-tdep.c: Use string.h, not gdb_string.h.
* ax-gdb.c: Use string.h, not gdb_string.h.
* ax-general.c: Use string.h, not gdb_string.h.
* bcache.c: Use string.h, not gdb_string.h.
* bfin-tdep.c: Use string.h, not gdb_string.h.
* breakpoint.c: Use string.h, not gdb_string.h.
* build-id.c: Use string.h, not gdb_string.h.
* buildsym.c: Use string.h, not gdb_string.h.
* c-exp.y: Use string.h, not gdb_string.h.
* c-lang.c: Use string.h, not gdb_string.h.
* c-typeprint.c: Use string.h, not gdb_string.h.
* c-valprint.c: Use string.h, not gdb_string.h.
* charset.c: Use string.h, not gdb_string.h.
* cli-out.c: Use string.h, not gdb_string.h.
* cli/cli-cmds.c: Use string.h, not gdb_string.h.
* cli/cli-decode.c: Use string.h, not gdb_string.h.
* cli/cli-dump.c: Use string.h, not gdb_string.h.
* cli/cli-interp.c: Use string.h, not gdb_string.h.
* cli/cli-logging.c: Use string.h, not gdb_string.h.
* cli/cli-script.c: Use string.h, not gdb_string.h.
* cli/cli-setshow.c: Use string.h, not gdb_string.h.
* cli/cli-utils.c: Use string.h, not gdb_string.h.
* coffread.c: Use string.h, not gdb_string.h.
* common/common-utils.c: Use string.h, not gdb_string.h.
* common/filestuff.c: Use string.h, not gdb_string.h.
* common/linux-procfs.c: Use string.h, not gdb_string.h.
* common/linux-ptrace.c: Use string.h, not gdb_string.h.
* common/signals.c: Use string.h, not gdb_string.h.
* common/vec.h: Use string.h, not gdb_string.h.
* core-regset.c: Use string.h, not gdb_string.h.
* corefile.c: Use string.h, not gdb_string.h.
* corelow.c: Use string.h, not gdb_string.h.
* cp-abi.c: Use string.h, not gdb_string.h.
* cp-support.c: Use string.h, not gdb_string.h.
* cp-valprint.c: Use string.h, not gdb_string.h.
* cris-tdep.c: Use string.h, not gdb_string.h.
* d-lang.c: Use string.h, not gdb_string.h.
* dbxread.c: Use string.h, not gdb_string.h.
* dcache.c: Use string.h, not gdb_string.h.
* demangle.c: Use string.h, not gdb_string.h.
* dicos-tdep.c: Use string.h, not gdb_string.h.
* disasm.c: Use string.h, not gdb_string.h.
* doublest.c: Use string.h, not gdb_string.h.
* dsrec.c: Use string.h, not gdb_string.h.
* dummy-frame.c: Use string.h, not gdb_string.h.
* dwarf2-frame.c: Use string.h, not gdb_string.h.
* dwarf2loc.c: Use string.h, not gdb_string.h.
* dwarf2read.c: Use string.h, not gdb_string.h.
* elfread.c: Use string.h, not gdb_string.h.
* environ.c: Use string.h, not gdb_string.h.
* eval.c: Use string.h, not gdb_string.h.
* event-loop.c: Use string.h, not gdb_string.h.
* exceptions.c: Use string.h, not gdb_string.h.
* exec.c: Use string.h, not gdb_string.h.
* expprint.c: Use string.h, not gdb_string.h.
* f-exp.y: Use string.h, not gdb_string.h.
* f-lang.c: Use string.h, not gdb_string.h.
* f-typeprint.c: Use string.h, not gdb_string.h.
* f-valprint.c: Use string.h, not gdb_string.h.
* fbsd-nat.c: Use string.h, not gdb_string.h.
* findcmd.c: Use string.h, not gdb_string.h.
* findvar.c: Use string.h, not gdb_string.h.
* fork-child.c: Use string.h, not gdb_string.h.
* frame.c: Use string.h, not gdb_string.h.
* frv-linux-tdep.c: Use string.h, not gdb_string.h.
* frv-tdep.c: Use string.h, not gdb_string.h.
* gdb.c: Use string.h, not gdb_string.h.
* gdb_bfd.c: Use string.h, not gdb_string.h.
* gdbarch.c: Use string.h, not gdb_string.h.
* gdbtypes.c: Use string.h, not gdb_string.h.
* gnu-nat.c: Use string.h, not gdb_string.h.
* gnu-v2-abi.c: Use string.h, not gdb_string.h.
* gnu-v3-abi.c: Use string.h, not gdb_string.h.
* go-exp.y: Use string.h, not gdb_string.h.
* go-lang.c: Use string.h, not gdb_string.h.
* go32-nat.c: Use string.h, not gdb_string.h.
* hppa-hpux-tdep.c: Use string.h, not gdb_string.h.
* hppa-linux-nat.c: Use string.h, not gdb_string.h.
* hppanbsd-tdep.c: Use string.h, not gdb_string.h.
* hppaobsd-tdep.c: Use string.h, not gdb_string.h.
* i386-cygwin-tdep.c: Use string.h, not gdb_string.h.
* i386-dicos-tdep.c: Use string.h, not gdb_string.h.
* i386-linux-nat.c: Use string.h, not gdb_string.h.
* i386-linux-tdep.c: Use string.h, not gdb_string.h.
* i386-nto-tdep.c: Use string.h, not gdb_string.h.
* i386-sol2-tdep.c: Use string.h, not gdb_string.h.
* i386-tdep.c: Use string.h, not gdb_string.h.
* i386bsd-tdep.c: Use string.h, not gdb_string.h.
* i386gnu-nat.c: Use string.h, not gdb_string.h.
* i386nbsd-tdep.c: Use string.h, not gdb_string.h.
* i386obsd-tdep.c: Use string.h, not gdb_string.h.
* i387-tdep.c: Use string.h, not gdb_string.h.
* ia64-libunwind-tdep.c: Use string.h, not gdb_string.h.
* ia64-linux-nat.c: Use string.h, not gdb_string.h.
* inf-child.c: Use string.h, not gdb_string.h.
* inf-ptrace.c: Use string.h, not gdb_string.h.
* inf-ttrace.c: Use string.h, not gdb_string.h.
* infcall.c: Use string.h, not gdb_string.h.
* infcmd.c: Use string.h, not gdb_string.h.
* inflow.c: Use string.h, not gdb_string.h.
* infrun.c: Use string.h, not gdb_string.h.
* interps.c: Use string.h, not gdb_string.h.
* iq2000-tdep.c: Use string.h, not gdb_string.h.
* irix5-nat.c: Use string.h, not gdb_string.h.
* jv-exp.y: Use string.h, not gdb_string.h.
* jv-lang.c: Use string.h, not gdb_string.h.
* jv-typeprint.c: Use string.h, not gdb_string.h.
* jv-valprint.c: Use string.h, not gdb_string.h.
* language.c: Use string.h, not gdb_string.h.
* linux-fork.c: Use string.h, not gdb_string.h.
* linux-nat.c: Use string.h, not gdb_string.h.
* lm32-tdep.c: Use string.h, not gdb_string.h.
* m2-exp.y: Use string.h, not gdb_string.h.
* m2-typeprint.c: Use string.h, not gdb_string.h.
* m32c-tdep.c: Use string.h, not gdb_string.h.
* m32r-linux-nat.c: Use string.h, not gdb_string.h.
* m32r-linux-tdep.c: Use string.h, not gdb_string.h.
* m32r-rom.c: Use string.h, not gdb_string.h.
* m32r-tdep.c: Use string.h, not gdb_string.h.
* m68hc11-tdep.c: Use string.h, not gdb_string.h.
* m68k-tdep.c: Use string.h, not gdb_string.h.
* m68kbsd-tdep.c: Use string.h, not gdb_string.h.
* m68klinux-nat.c: Use string.h, not gdb_string.h.
* m68klinux-tdep.c: Use string.h, not gdb_string.h.
* m88k-tdep.c: Use string.h, not gdb_string.h.
* macrocmd.c: Use string.h, not gdb_string.h.
* main.c: Use string.h, not gdb_string.h.
* mdebugread.c: Use string.h, not gdb_string.h.
* mem-break.c: Use string.h, not gdb_string.h.
* memattr.c: Use string.h, not gdb_string.h.
* memory-map.c: Use string.h, not gdb_string.h.
* mep-tdep.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-break.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-disas.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-env.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-stack.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-var.c: Use string.h, not gdb_string.h.
* mi/mi-cmds.c: Use string.h, not gdb_string.h.
* mi/mi-console.c: Use string.h, not gdb_string.h.
* mi/mi-getopt.c: Use string.h, not gdb_string.h.
* mi/mi-interp.c: Use string.h, not gdb_string.h.
* mi/mi-main.c: Use string.h, not gdb_string.h.
* mi/mi-parse.c: Use string.h, not gdb_string.h.
* microblaze-rom.c: Use string.h, not gdb_string.h.
* microblaze-tdep.c: Use string.h, not gdb_string.h.
* mingw-hdep.c: Use string.h, not gdb_string.h.
* minidebug.c: Use string.h, not gdb_string.h.
* minsyms.c: Use string.h, not gdb_string.h.
* mips-irix-tdep.c: Use string.h, not gdb_string.h.
* mips-linux-tdep.c: Use string.h, not gdb_string.h.
* mips-tdep.c: Use string.h, not gdb_string.h.
* mips64obsd-tdep.c: Use string.h, not gdb_string.h.
* mipsnbsd-tdep.c: Use string.h, not gdb_string.h.
* mipsread.c: Use string.h, not gdb_string.h.
* mn10300-linux-tdep.c: Use string.h, not gdb_string.h.
* mn10300-tdep.c: Use string.h, not gdb_string.h.
* monitor.c: Use string.h, not gdb_string.h.
* moxie-tdep.c: Use string.h, not gdb_string.h.
* mt-tdep.c: Use string.h, not gdb_string.h.
* nbsd-tdep.c: Use string.h, not gdb_string.h.
* nios2-linux-tdep.c: Use string.h, not gdb_string.h.
* nto-procfs.c: Use string.h, not gdb_string.h.
* nto-tdep.c: Use string.h, not gdb_string.h.
* objc-lang.c: Use string.h, not gdb_string.h.
* objfiles.c: Use string.h, not gdb_string.h.
* opencl-lang.c: Use string.h, not gdb_string.h.
* osabi.c: Use string.h, not gdb_string.h.
* osdata.c: Use string.h, not gdb_string.h.
* p-exp.y: Use string.h, not gdb_string.h.
* p-lang.c: Use string.h, not gdb_string.h.
* p-typeprint.c: Use string.h, not gdb_string.h.
* parse.c: Use string.h, not gdb_string.h.
* posix-hdep.c: Use string.h, not gdb_string.h.
* ppc-linux-nat.c: Use string.h, not gdb_string.h.
* ppc-sysv-tdep.c: Use string.h, not gdb_string.h.
* ppcfbsd-tdep.c: Use string.h, not gdb_string.h.
* ppcnbsd-tdep.c: Use string.h, not gdb_string.h.
* ppcobsd-tdep.c: Use string.h, not gdb_string.h.
* printcmd.c: Use string.h, not gdb_string.h.
* procfs.c: Use string.h, not gdb_string.h.
* prologue-value.c: Use string.h, not gdb_string.h.
* python/py-auto-load.c: Use string.h, not gdb_string.h.
* python/py-gdb-readline.c: Use string.h, not gdb_string.h.
* ravenscar-thread.c: Use string.h, not gdb_string.h.
* regcache.c: Use string.h, not gdb_string.h.
* registry.c: Use string.h, not gdb_string.h.
* remote-fileio.c: Use string.h, not gdb_string.h.
* remote-m32r-sdi.c: Use string.h, not gdb_string.h.
* remote-mips.c: Use string.h, not gdb_string.h.
* remote-sim.c: Use string.h, not gdb_string.h.
* remote.c: Use string.h, not gdb_string.h.
* reverse.c: Use string.h, not gdb_string.h.
* rs6000-aix-tdep.c: Use string.h, not gdb_string.h.
* ser-base.c: Use string.h, not gdb_string.h.
* ser-go32.c: Use string.h, not gdb_string.h.
* ser-mingw.c: Use string.h, not gdb_string.h.
* ser-pipe.c: Use string.h, not gdb_string.h.
* ser-tcp.c: Use string.h, not gdb_string.h.
* ser-unix.c: Use string.h, not gdb_string.h.
* serial.c: Use string.h, not gdb_string.h.
* sh-tdep.c: Use string.h, not gdb_string.h.
* sh64-tdep.c: Use string.h, not gdb_string.h.
* shnbsd-tdep.c: Use string.h, not gdb_string.h.
* skip.c: Use string.h, not gdb_string.h.
* sol-thread.c: Use string.h, not gdb_string.h.
* solib-dsbt.c: Use string.h, not gdb_string.h.
* solib-frv.c: Use string.h, not gdb_string.h.
* solib-osf.c: Use string.h, not gdb_string.h.
* solib-spu.c: Use string.h, not gdb_string.h.
* solib-target.c: Use string.h, not gdb_string.h.
* solib.c: Use string.h, not gdb_string.h.
* somread.c: Use string.h, not gdb_string.h.
* source.c: Use string.h, not gdb_string.h.
* sparc-nat.c: Use string.h, not gdb_string.h.
* sparc-sol2-tdep.c: Use string.h, not gdb_string.h.
* sparc-tdep.c: Use string.h, not gdb_string.h.
* sparc64-tdep.c: Use string.h, not gdb_string.h.
* sparc64fbsd-tdep.c: Use string.h, not gdb_string.h.
* sparc64nbsd-tdep.c: Use string.h, not gdb_string.h.
* sparcnbsd-tdep.c: Use string.h, not gdb_string.h.
* spu-linux-nat.c: Use string.h, not gdb_string.h.
* spu-multiarch.c: Use string.h, not gdb_string.h.
* spu-tdep.c: Use string.h, not gdb_string.h.
* stabsread.c: Use string.h, not gdb_string.h.
* stack.c: Use string.h, not gdb_string.h.
* std-regs.c: Use string.h, not gdb_string.h.
* symfile.c: Use string.h, not gdb_string.h.
* symmisc.c: Use string.h, not gdb_string.h.
* symtab.c: Use string.h, not gdb_string.h.
* target.c: Use string.h, not gdb_string.h.
* thread.c: Use string.h, not gdb_string.h.
* tilegx-linux-nat.c: Use string.h, not gdb_string.h.
* tilegx-tdep.c: Use string.h, not gdb_string.h.
* top.c: Use string.h, not gdb_string.h.
* tracepoint.c: Use string.h, not gdb_string.h.
* tui/tui-command.c: Use string.h, not gdb_string.h.
* tui/tui-data.c: Use string.h, not gdb_string.h.
* tui/tui-disasm.c: Use string.h, not gdb_string.h.
* tui/tui-file.c: Use string.h, not gdb_string.h.
* tui/tui-layout.c: Use string.h, not gdb_string.h.
* tui/tui-out.c: Use string.h, not gdb_string.h.
* tui/tui-regs.c: Use string.h, not gdb_string.h.
* tui/tui-source.c: Use string.h, not gdb_string.h.
* tui/tui-stack.c: Use string.h, not gdb_string.h.
* tui/tui-win.c: Use string.h, not gdb_string.h.
* tui/tui-windata.c: Use string.h, not gdb_string.h.
* tui/tui-winsource.c: Use string.h, not gdb_string.h.
* typeprint.c: Use string.h, not gdb_string.h.
* ui-file.c: Use string.h, not gdb_string.h.
* ui-out.c: Use string.h, not gdb_string.h.
* user-regs.c: Use string.h, not gdb_string.h.
* utils.c: Use string.h, not gdb_string.h.
* v850-tdep.c: Use string.h, not gdb_string.h.
* valarith.c: Use string.h, not gdb_string.h.
* valops.c: Use string.h, not gdb_string.h.
* valprint.c: Use string.h, not gdb_string.h.
* value.c: Use string.h, not gdb_string.h.
* varobj.c: Use string.h, not gdb_string.h.
* vax-tdep.c: Use string.h, not gdb_string.h.
* vaxnbsd-tdep.c: Use string.h, not gdb_string.h.
* vaxobsd-tdep.c: Use string.h, not gdb_string.h.
* windows-nat.c: Use string.h, not gdb_string.h.
* xcoffread.c: Use string.h, not gdb_string.h.
* xml-support.c: Use string.h, not gdb_string.h.
* xstormy16-tdep.c: Use string.h, not gdb_string.h.
* xtensa-linux-nat.c: Use string.h, not gdb_string.h.
This patch adds a new command "info exceptions" whose purpose is to
provide the list of exceptions currently defined in the inferior.
The usage is:
(gdb) info exceptions [REGEXP]
Without argument, the command lists all exceptions. Otherwise,
only those whose name match REGEXP are listed.
For instance:
(gdb) info exceptions
All defined Ada exceptions:
constraint_error: 0x613dc0
program_error: 0x613d40
storage_error: 0x613d00
tasking_error: 0x613cc0
global_exceptions.a_global_exception: 0x613a80
global_exceptions.a_private_exception: 0x613ac0
The name of the command, as well as its output is part of a legacy
I inherited long ago. It's output being parsed by frontends such as
GPS, I cannot easily change it. Same for the command name.
The implementation is mostly self-contained, and is written in a way
that should make it easy to implement the GDB/MI equivalent. The
careful reviewer will notice that the code added in ada-lang.h could
normally be made private inside ada-lang.c. But these will be used
by the GDB/MI implementation. Rather than making those private now,
only to move them later, I've made them public right away.
gdb/ChangeLog:
* ada-lang.h: #include "vec.h".
(struct ada_exc_info): New.
(ada_exc_info): New typedef.
(DEF_VEC_O(ada_exc_info)): New vector.
(ada_exceptions_list): Add declaration.
* ada-lang.c (ada_is_exception_sym)
(ada_is_non_standard_exception_sym, compare_ada_exception_info)
(sort_remove_dups_ada_exceptions_list)
(ada_exc_search_name_matches, ada_add_standard_exceptions)
(ada_add_exceptions_from_frame, ada_add_global_exceptions)
(ada_exceptions_list_1, ada_exceptions_list)
(info_exceptions_command): New function.
(_initialize_ada_language): Add "info exception" command.
gdb/testsuite/ChangeLog:
* gdb.ada/info_exc: New testcase.
When using the GDB/MI commands to insert a catchpoint on a specific
Ada exception, any re-evaluation of that catchpoint (for instance
a re-evaluation performed after a shared library got mapped by the
inferior) fails. For instance, with any Ada program:
(gdb)
-catch-exception -e program_error
^done,bkptno="1",bkpt={[...]}
(gdb)
-exec-run
=thread-group-started,id="i1",pid="28315"
=thread-created,id="1",group-id="i1"
^running
*running,thread-id="all"
(gdb)
=library-loaded,[...]
&"warning: failed to reevaluate internal exception condition for catchpoint 1: No definition of \"exec\" in current context.\n"
&"warning: failed to reevaluate internal exception condition for catchpoint 1: No definition of \"exec\" in current context.\n"
[...]
The same is true if using an Ada exception catchpoint.
The problem comes from the fact that that we deallocate the strings
given as arguments to create_ada_exception_catchpoint, while the latter
just makes shallow copies of those strings, thus creating dandling
pointers.
This patch fixes the issue by passing freshly allocated strings to
create_ada_exception_catchpoint, while at the same time updating
create_ada_exception_catchpoint's documentation to make it clear
that deallocating the strings is no longer the responsibility of
the caller.
gdb/ChangeLog:
* ada-lang.c (create_ada_exception_catchpoint): Enhance
the documentation of fields "except_string" and "condition".
* mi/mi-cmd-catch.c (mi_cmd_catch_assert): Reallocate
CONDITION on the heap before passing it to
create_ada_exception_catchpoint.
(mi_cmd_catch_exception): Likewise for EXCEPTION_NAME and
CONDITION.
gdb/testsuite/ChangeLog:
* gdb.ada/mi_ex_cond: New testcase.
Tested on x86_64-linux. The "-break-list" test FAILs without
this patch.
This is a follow-up series to move language stuff out of varobj.c.
This patch adds a new field la_varobj_ops in struct language_defn so
that each language has varobj-related options. Not every language
supports varobj, and the operations are identical to operations of c
languages.
'struct language_defn' is the ideal place to save all language-related
operations. After this patch, some cleanups can be done in patch 2/2,
which removes language-related stuff completely from varobj.c.
Regression tested on x86_64-linux.
gdb:
2013-10-25 Yao Qi <yao@codesourcery.com>
* language.h (struct lang_varobj_ops): Declare.
(struct language_defn) <la_varobj_ops>: New field.
* ada-lang.c: Include "varobj.h"
(defn ada_language_defn): Initialize field 'la_varobj_ops' by
ada_varobj_ops.
* c-lang.c: Include "varobj.h"
(c_language_defn): Initialize field 'la_varobj_ops' by
c_varobj_ops.
(cplus_language_defn): Initialize field 'la_varobj_ops' by
cplus_varobj_ops.
(asm_language_defn): Initialize field 'la_varobj_ops' by
default_varobj_ops.
(minimal_language_defn): Likewise.
* d-lang.c (d_language_defn): Likewise.
* f-lang.c (f_language_defn): Likewise.
* go-lang.c (go_language_defn): Likewise.
* m2-lang.c (m2_language_defn): Likewise.
* objc-lang.c (objc_language_defn): Likewise.
* opencl-lang.c (opencl_language_defn): Likewise.
* p-lang.c (pascal_language_defn): Likewise.
* language.c (unknown_language_defn): Likewise.
(auto_language_defn): Likewise.
(local_language_defn): Likewise.
* jv-lang.c (java_language_defn): Initialize field
'la_varobj_ops' by java_varobj_ops.
* varobj.c (varobj_create): Update.
* varobj.h (default_varobj_ops): Define macro.
This patch introduces two new GDB/MI commands implementing the equivalent
of the "catch exception" and "catch assert" GDB/CLI commands.
gdb/ChangeLog:
* breakpoint.h (init_ada_exception_breakpoint): Add parameter
"enabled".
* breakpoint.c (init_ada_exception_breakpoint): Add parameter
"enabled". Set B->ENABLE_STATE accordingly.
* ada-lang.h (ada_exception_catchpoint_kind): Move here from
ada-lang.c.
(create_ada_exception_catchpoint): Add declaration.
* ada-lang.c (ada_exception_catchpoint_kind): Move to ada-lang.h.
(create_ada_exception_catchpoint): Make non-static. Add new
parameter "disabled". Use it in call to
init_ada_exception_breakpoint.
(catch_ada_exception_command): Add parameter "enabled" in call
to create_ada_exception_catchpoint.
(catch_assert_command): Likewise.
* mi/mi-cmds.h (mi_cmd_catch_assert, mi_cmd_catch_exception):
Add declarations.
* mi/mi-cmds.c (mi_cmds): Add the "catch-assert" and
"catch-exception" commands.
* mi/mi-cmd-catch.c: Add #include "ada-lang.h".
(mi_cmd_catch_assert, mi_cmd_catch_exception): New functions.
This is in preparation for making that type public, in order to be
able to use make create_ada_exception_catchpoint public as well,
making it usable from the GDB/MI implementation.
gdb/ChangeLog:
* ada-lang.c (enum ada_exception_catchpoint_kind): Renames
"enum exception_catchpoint_kind". Replace the "ex_" prefix
of all its enumerates with "ada_". Update the rest of this
file throughout.
This patch reworks a bit how the different steps required to insert
an Ada exception catchpoints are organized. They used to be:
1. Call a "decode" function which does:
1.a. Parse the command and its arguments
1.b. Create a SAL & OPS from some of those arguments
2. Call create_ada_exception_catchpoint using SAL as well
as some of the arguments extracted above.
The bulk of the change consists in integrating step (1.b) into
step (2) in order to turn create_ada_exception_catchpoint into
a function whose arguments are all user-level concepts. This
paves the way from a straightforward implementation of the equivalent
commands in the GDB/MI interpreter.
gdb/ChangeLog:
* ada-lang.c (ada_decode_exception_location): Delete.
(create_ada_exception_catchpoint): Remove arguments "sal",
"addr_string" and "ops". Add argument "ex_kind" instead.
Adjust implementation accordingly, calling ada_exception_sal
to get the entities it no longer gets passed as arguments.
Document the function's arguments.
(catch_ada_exception_command): Use catch_ada_exception_command_split
instead of ada_decode_exception_location, and update call to
create_ada_exception_catchpoint.
(catch_ada_assert_command_split): Renames
ada_decode_assert_location. Remove parameters "addr_string" and
"ops", and now returns void. Adjust implementation accordingly.
Update the function documentation.
(catch_assert_command): Use catch_ada_assert_command_split
instead of ada_decode_assert_location. Update call to
create_ada_exception_catchpoint.
Upon trying to print the value of a variant record, a user noticed
the following problem:
(gdb) print rt
warning: Unknown upper bound, using 1.
warning: Unknown upper bound, using 1.
$1 = (a => ((a1 => (4), a2 => (4)), (a1 => (8), a2 => (8))))
The expected output is:
(gdb) print rt
$1 = (a => ((a1 => (4, 4), a2 => (8, 8)), (a1 => (4, 4),
a2 => (8, 8))))
The problems comes from the fact that components "a1" and "a2" are
defined as arrays whose upper bound is dynamic. To determine the value
of that upper bound, GDB relies on the GNAT encoding and searches
for the parallel ___U variable. Unfortunately, the search fails
while doing a binary search inside the partial symtab of the unit
where the array and its bound (and therefore the parallel ___U variable)
are defined.
It fails because partial symbols are sorted using strcmp_iw_ordered,
while Ada symbol lookups are performed using a different comparison
function (ada-lang.c:compare_names). The two functions are supposed
to be compatible, but a change performed in April 2011 modified
strcmp_iw_ordered, introducing case-sensitivity issues. As a result,
the two functions would now disagree when passed the following
two arguments:
string1="common__inner_arr___SIZE_A_UNIT"
string2="common__inner_arr__T4s___U"
The difference starts at "_SIZE_A_UNIT" vs "T4s___U". So, it's mostly
a matter of comparing '_' with 'T'.
On the one hand, strcmp_iw_ordered would return -1, while compare_names
returned 11. The change that made all the difference is that
strcmp_iw_ordered now performs a case-insensitive comparison,
and only resorts to case-sentitive comparison if the first comparison
finds an equality. This changes everything, because while 'T' (84)
and 't' (116) are on opposite sides of '_' (95).
This patch aims at restoring the compatibility between the two
functions, by adding case-sensitivity handling in the Ada comparison
function.
gdb/ChangeLog:
* ada-lang.c (compare_names_with_case): Renamed from
compare_names, adding a new parameter "casing" and its handling.
New function documentation.
(compare_names): New function, implemented using
compare_names_with_case.
When building the program with the shared GNAT runtime, the debugger
is unable to insert Ada exception catchpoints until that runtime
has been mapped to memory. In other words, we expect the user to start
the program first, before attempting to insert that catchpoint.
The detection mechanism that tries to provide some useful tips to
the user fails when the program itself contains a trampoline symbol
matching the symbol that the catchpoint is trying to use. This
results in the following error message:
(gdb) catch exception
Your Ada runtime appears to be missing some debugging information.
Cannot insert Ada exception catchpoint in this configuration.
Instead, we expected the following error message:
(gdb) catch exception
Unable to insert catchpoint. Try to start the program first.
gdb/ChangeLog:
* ada-lang.c (ada_has_this_exception_support): Ignore
mst_solib_trampoline minimal symbols.
This is another patch in my ongoing series to "split" objfile to share
more read-only data across inferiors. See
http://sourceware.org/gdb/wiki/ObjfileSplitting
When symbols are finally shared, there will be no back-link from the
symbol to its containing objfile, because there may be more than one
such objfile. So, all such back-links must be removed.
One hidden back-link is the msymbol_objfile function. Since
(eventually) a symbol may appear in more than one objfile, trying to
look up the objfile given just a symbol cannot work.
This patch removes msymbol_objfile in favor of using a bound minimal
symbol. It introduces a new function to make this conversion simpler
in some spots.
The bonus of this patch is that using msymbol_objfile is slower than
simply looking up the owning objfile in the first place.
Built and regtested on x86-64 Fedora 18.
* ada-exp.y (write_var_or_type): Use bound_minimal_symbol.
* ada-lang.c (ada_lookup_simple_minsym): Return
bound_minimal_symbol.
* ada-lang.h (ada_lookup_simple_minsym): Update.
* c-exp.y (variable): Use lookup_bound_minimal_symbol.
* f-exp.y (variable): Use lookup_bound_minimal_symbol.
* go-exp.y (variable): Use lookup_bound_minimal_symbol.
* jv-exp.y (push_expression_name): Use lookup_bound_minimal_symbol.
* m2-exp.y (variable): Use lookup_bound_minimal_symbol.
* minsyms.c (msymbol_objfile): Remove.
(lookup_minimal_symbol_internal): New function, from
lookup_minimal_symbol.
(lookup_minimal_symbol): Rewrite using
lookup_minimal_symbol_internal.
(lookup_bound_minimal_symbol): New function.
* minsyms.h (msymbol_objfile): Remove.
(lookup_bound_minimal_symbol): Declare.
* p-exp.y (variable): Use lookup_bound_minimal_symbol.
* parse.c (write_exp_msymbol): Change parameter to a
bound_minimal_symbol.
(write_dollar_variable): Use lookup_bound_minimal_symbol.
* parser-defs.h (write_exp_msymbol): Update.
* printcmd.c (address_info): Use lookup_bound_minimal_symbol.
* symfile.c (simple_read_overlay_table): Use
lookup_bound_minimal_symbol.
* symtab.c (skip_prologue_sal): Don't use msymbol_objfile.
(search_symbols): Likewise.
(print_msymbol_info): Take a bound_minimal_symbol argument.
(symtab_symbol_info, rbreak_command): Update.
* symtab.h (struct symbol_search) <msymbol>: Change type
to bound_minimal_symbol.
* valops.c (find_function_in_inferior): Use
lookup_bound_minimal_symbol.
* value.c (value_fn_field): Use lookup_bound_minimal_symbol.
ada-lang.c:coerce_unspec_val_to_type does:
if (value_lazy (val)
|| TYPE_LENGTH (type) > TYPE_LENGTH (value_type (val)))
result = allocate_value_lazy (type);
else
{
result = allocate_value (type);
memcpy (value_contents_raw (result), value_contents (val),
TYPE_LENGTH (type));
}
set_value_component_location (result, val);
set_value_bitsize (result, value_bitsize (val));
set_value_bitpos (result, value_bitpos (val));
set_value_address (result, value_address (val));
set_value_optimized_out (result, value_optimized_out (val));
Notice that before value_optimized_out was made to auto-fetch lazy
values, VAL would end up still lazy if it was lazy on entry. It's not
really a problem here if VAL is lazy, and VAL->optimized_out is 0,
because RESULT is also left lazy. IOW, this just wants to copy the
VAL->optimized_out flag to RESULT->optimized_out, nothing else.
As a side-effect of the change in value_optimized_out, the following
testcase now regresses. Consider:
type Small is range -64 .. 63;
for Small'Size use 7;
type Arr is array (1..10) of Small;
pragma Pack (Arr);
type Arr_Ptr is access Arr;
An_Arr_Ptr : Arr_Ptr := new Arr'(10, 20, 30, 40, 50, 60, 62, 63,
-23, 42);
Trying to print one element of An_Arr_Ptr yields:
(gdb) p an_arr_ptr(3)
Cannot access memory at address 0x0
The patch adds the value_optimized_out_const function for that,
allowing us to avoid trying to fetch a value at a dummy address.
(I found this out by grepping for set_value_optimized_out and trying
to convert the uses I found to instead allocate the value with
allocate_optimized_out_value.)
Tested on x86_64 Fedora 17.
gdb/
2013-07-09 Pedro Alves <palves@redhat.com>
* ada-lang.c (coerce_unspec_val_to_type): Use
value_optimized_out_const.
* value.c (value_optimized_out_const): New function.
* value.h (value_optimized_out_const): New declaration.
'func_name' from find_frame_funname.
(ada_unhandled_exception_name_addr_from_raise): Add cleanups
for func_name from find_frame_funname.
* python/py-frame.c (frapy_name): Add explicit free of
'name' from find_frame_funname.
* stack.c (find_frame_funname): Add comment explaining that
funcp must be freed by the caller.
Return copy of symbol names instead of pointers.
(print_frame): Add a cleanup for 'funname' from
find_frame_funname.
* stack.h (find_frame_funname): Remove "const" from
'funname' parameter.
This results in an internal-warning when trying the completion
when in Ada mode:
(gdb) b simple<TAB>
/[...]/cleanups.c:265: internal-warning: restore_my_cleanups has found a stale cleanup
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n)
gdb/ChangeLog:
* ada-lang.c (ada_make_symbol_completion_list): Make sure
all cleanups are done before returning from this function.
gdb/testsuite/ChangeLog:
* gdb.ada/complete.exp: Add test verifying completion using
the "tab" key.
call value_incref.
* value.c (set_value_parent): Incref the new parent and decref
the old parent.
(value_copy, value_primitive_field): Use set_value_parent.
We're reading strings using the target memory access routines, which
work with raw bytes, so we need a couple casts.
gdb/
2013-04-19 Pedro Alves <palves@redhat.com>
* ada-lang.c (print_it_exception): Add cast to gdb_byte *.
* ada-tasks.c (read_fat_string_value): Likewise.
-Wpointer-sign catches all these cases across the codebase that should
be using gdb_byte for raw target bytes. I think these are all
obvious, hence I've collapsed into a single patch.
gdb/
2013-04-19 Pedro Alves <palves@redhat.com>
* aarch64-tdep.c (aarch64_default_breakpoint): Change type to
gdb_byte[].
(aarch64_breakpoint_from_pc): Change return type to gdb_byte *.
* ada-lang.c (ada_value_assign): Use gdb_byte.
* alphanbsd-tdep.c (sigtramp_retcode): Change type to gdb_byte[].
(alphanbsd_sigtramp_offset): Use gdb_byte.
* arm-linux-tdep.c (arm_linux_arm_le_breakpoint)
(arm_linux_arm_be_breakpoint, eabi_linux_arm_le_breakpoint)
(eabi_linux_arm_be_breakpoint, arm_linux_thumb_be_breakpoint)
(arm_linux_thumb_le_breakpoint, arm_linux_thumb2_be_breakpoint)
(arm_linux_thumb2_le_breakpoint): Change type to gdb_byte[].
* arm-tdep.c (arm_stub_unwind_sniffer)
(arm_displaced_init_closure): Use gdb_byte.
(arm_default_arm_le_breakpoint, arm_default_arm_be_breakpoint)
(arm_default_thumb_le_breakpoint)
(arm_default_thumb_be_breakpoint): Change type to gdb_byte[].
* arm-tdep.h (struct gdbarch_tdep) <arm_breakpoint,
thumb_breakpoint, thumb2_breakpoint>: Change type to gdb_byte *.
* arm-wince-tdep.c (arm_wince_le_breakpoint)
(arm_wince_thumb_le_breakpoint): Change type to gdb_byte[].
* armnbsd-tdep.c (arm_nbsd_arm_le_breakpoint)
(arm_nbsd_arm_be_breakpoint, arm_nbsd_thumb_le_breakpoint)
(arm_nbsd_thumb_be_breakpoint): Change type to gdb_byte[].
* armobsd-tdep.c (arm_obsd_thumb_le_breakpoint)
(arm_obsd_thumb_be_breakpoint): Change type to gdb_byte[].
* cris-tdep.c (push_stack_item, cris_push_dummy_call)
(cris_store_return_value, cris_extract_return_value): Use
gdb_byte.
(constraint): Change type of parameter to char * from signed
char*. Use gdb_byte.
* dwarf2loc.c (read_pieced_value, write_pieced_value): Change type
of local buffer to gdb_byte *.
* dwarf2read.c (read_index_from_section): Use gdb_byte.
(create_dwp_hash_table): Change type of locals to gdb_byte *.
(add_address_entry): Change type of local buffer to gdb_byte[].
* frv-tdep.c (frv_adjust_breakpoint_address, find_func_descr)
(frv_push_dummy_call): Use gdb_byte.
* hppa-hpux-tdep.c (hppa_hpux_push_dummy_code)
(hppa_hpux_supply_ss_fpblock, hppa_hpux_supply_ss_wide)
(hppa_hpux_supply_save_state): Use gdb_byte.
* hppa-tdep.c (hppa32_push_dummy_call)
(hppa64_convert_code_addr_to_fptr): Use gdb_byte.
* ia64-tdep.c (extract_bit_field, replace_bit_field)
(slotN_contents, replace_slotN_contents): Change type of parameter
to gdb_byte *.
(fetch_instruction, ia64_pseudo_register_write)
(ia64_register_to_value, ia64_value_to_register)
(ia64_extract_return_value, ia64_store_return_value)
(ia64_push_dummy_call): Use gdb_byte.
* m32c-tdep.c (m32c_return_value): Remove cast.
* m68hc11-tdep.c (m68hc11_pseudo_register_write)
(m68hc11_push_dummy_call, m68hc11_store_return_value): Use
gdb_byte.
* mipsnbsd-tdep.c (mipsnbsd_get_longjmp_target): Use gdb_byte.
* mn10300-tdep.c (mn10300_store_return_value)
(mn10300_breakpoint_from_pc, mn10300_push_dummy_call): Use
gdb_byte.
* moxie-tdep.c (moxie_process_readu): Use gdb_byte.
(moxie_process_record): Remove casts.
* ppc-ravenscar-thread.c (supply_register_at_address)
(ppc_ravenscar_generic_store_registers): Use gdb_byte.
* ravenscar-thread.c (get_running_thread_id): Use gdb_byte.
* remote-m32r-sdi.c (m32r_fetch_register): Use gdb_byte.
* remote-mips.c (mips_xfer_memory): Use gdb_byte.
* remote.c (compare_sections_command): Use gdb_byte.
* score-tdep.c (score7_free_memblock): Change type of parameter to
gdb_byte *.
* sh-tdep.c (sh_justify_value_in_reg): Change return type to
gdb_byte *. Use gdb_byte.
(sh_push_dummy_call_fpu): Use gdb_byte.
(sh_extract_return_value_nofpu, sh_extract_return_value_fpu)
(sh_store_return_value_nofpu, sh_store_return_value_fpu)
(sh_register_convert_to_virtual, sh_register_convert_to_raw):
Change parameter type to 'gdb_byte *'. Use gdb_byte.
(sh_pseudo_register_read, sh_pseudo_register_write): Use gdb_byte.
* sh64-tdep.c (sh64_push_dummy_call): Use gdb_byte.
(sh64_store_return_value, sh64_register_convert_to_virtual):
Change parameter type to 'gdb_byte *'. Use gdb_byte.
(sh64_pseudo_register_write): Use gdb_byte.
* solib-darwin.c (darwin_current_sos): Add casts to 'gdb_byte *'.
* solib-irix.c (fetch_lm_info): Likewise. Use gdb_byte for byte
buffer.
(irix_current_sos): Use gdb_byte.
* solib-som.c (som_current_sos): Use gdb_byte.
* sparc-ravenscar-thread.c (supply_register_at_address)
(sparc_ravenscar_generic_store_registers): Use gdb_byte.
* spu-multiarch.c (spu_xfer_partial): Add cast to 'char *'.
* spu-tdep.c (spu_get_overlay_table): Use gdb_byte.
* tic6x-tdep.c (tic6x_breakpoint_from_pc): Change return type to
'gdb_byte *'.
* tic6x-tdep.h (struct gdbarch_tdep) <breakpoint>: Change type to
'gdb_byte *'.
* tracepoint.c (tfile_fetch_registers): Use gdb_byte.
* xstormy16-tdep.c (xstormy16_extract_return_value)
(xstormy16_store_return_value): Change parameter type to
'gdb_byte *'. Adjust.
(xstormy16_push_dummy_call): Use gdb_byte.
* xtensa-tdep.c (xtensa_scan_prologue, call0_ret)
(call0_analyze_prologue, execute_code): Use gdb_byte.
This is sort of a continuation of Keith's parse_exp_1 constification
patch. It started out by undoing these bits:
@@ -754,9 +754,12 @@ validate_actionline (char **line, struct
tmp_p = p;
for (loc = t->base.loc; loc; loc = loc->next)
{
- p = tmp_p;
- exp = parse_exp_1 (&p, loc->address,
+ const char *q;
+
+ q = tmp_p;
+ exp = parse_exp_1 (&q, loc->address,
block_for_pc (loc->address), 1);
+ p = (char *) q;
and progressively making more things const upwards, fixing fallout,
rinse repeat, until GDB built again (--enable-targets=all).
That ended up constifying lookup_cmd/add_cmd and (lots of) friends,
and the completers.
I didn't try to constify the command hooks themselves, because I know
upfront there are commands that write to the command string argument,
and I think I managed to stop at a nice non-hacky split point already.
I think the only non-really-super-obvious changes are
tracepoint.c:validate_actionline, and tracepoint.c:trace_dump_actions.
The rest is just mostly about 'char *' => 'const char *', 'char **'=>
'const char **', and the occasional (e.g., deprecated_cmd_warning)
case of 'char **'=> 'const char *', where/when I noticed that nothing
actually cares about the pointer to pointer output.
Tested on x86_64 Fedora 17, native and gdbserver.
gdb/
2013-03-13 Pedro Alves <palves@redhat.com>
* ada-lang.c (struct add_partial_datum) <text, text0, word>: Make
fields const.
(ada_make_symbol_completion_list): Make "text0" parameter const.
* ax-gdb.c (agent_eval_command_one): Make "exp" parameter const.
* breakpoint.c (condition_completer): Make "text" and "word"
parameters const. Adjust.
(check_tracepoint_command): Adjust to validate_actionline
prototype change.
(catch_syscall_completer): Make "text" and "word" parameters
const.
* cli/cli-cmds.c (show_user): Make "comname" local const.
(valid_command_p): Make "command" parameter const.
(alias_command): Make "alias_prefix" and "command_prefix" locals
const.
* cli/cli-decode.c (add_cmd): Make "name" parameter const.
(add_alias_cmd): Make "name" and "oldname" parameters const.
Adjust. No longer make copy of OLDNAME.
(add_prefix_cmd, add_abbrev_prefix_cmd, add_set_or_show_cmd)
(add_setshow_cmd_full, add_setshow_enum_cmd)
(add_setshow_auto_boolean_cmd, add_setshow_boolean_cmd)
(add_setshow_filename_cmd, add_setshow_string_cmd)
(add_setshow_string_noescape_cmd)
(add_setshow_optional_filename_cmd, add_setshow_integer_cmd)
(add_setshow_uinteger_cmd, add_setshow_zinteger_cmd)
(add_setshow_zuinteger_unlimited_cmd, add_setshow_zuinteger_cmd)
(delete_cmd, add_info, add_info_alias, add_com, add_com_alias):
Make "name" parameter const.
(help_cmd): Rename "command" parameter to "arg". New const local
"command".
(find_cmd): Make "command" parameter const.
(lookup_cmd_1): Make "text" parameter pointer to const. Adjust to
deprecated_cmd_warning prototype change.
(undef_cmd_error): Make "cmdtype" parameter const.
(lookup_cmd): Make "line" parameter const.
(deprecated_cmd_warning): Change type of "text" parameter to
pointer to const char, from pointer to pointer to char. Adjust.
(lookup_cmd_composition): Make "text" parameter const.
(complete_on_cmdlist, complete_on_enum): Make "text" and "word"
parameters const.
* cli/cli-decode.h (struct cmd_list_element) <name>: Make field
const.
* cli/cli-script.c (validate_comname): Make "tem" local const.
(define_command): New const local "tem_c". Use it in calls to
lookup_cmd.
(document_command): Make "tem" and "comfull" locals const.
(show_user_1): Make "prefix" and "name" parameters const.
* cli-script.h (show_user_1): Make "prefix" and "name" parameters
const.
* command.h (add_cmd, add_alias_cmd, add_prefix_cmd)
(add_abbrev_prefix_cmd, completer_ftype, lookup_cmd, lookup_cmd_1)
(deprecated_cmd_warning, lookup_cmd_composition, add_com)
(add_com_alias, add_info, add_info_alias, complete_on_cmdlist)
(complete_on_enum, add_setshow_enum_cmd)
(add_setshow_auto_boolean_cmd, add_setshow_boolean_cmd)
(add_setshow_filename_cmd, add_setshow_string_cmd)
(add_setshow_string_noescape_cmd)
(add_setshow_optional_filename_cmd, add_setshow_integer_cmd)
(add_setshow_uinteger_cmd, add_setshow_zinteger_cmd)
(add_setshow_zuinteger_cmd, add_setshow_zuinteger_unlimited_cmd):
Change prototypes, constifying strings.
* completer.c (noop_completer, filename_completer): Make "text"
and "prefix" parameters const.
(location_completer, expression_completer)
(complete_line_internal): Make "text" and "prefix" parameters
const and adjust.
(command_completer, signal_completer): Make "text" and "prefix"
parameters const.
* completer.h (noop_completer, filename_completer)
(expression_completer, location_completer, command_completer)
(signal_completer): Change prototypes.
* corefile.c (complete_set_gnutarget): Make "text" and "word"
parameters const.
* cp-abi.c (cp_abi_completer): Likewise.
* expression.h (parse_expression_for_completion): Change
prototype.
* f-lang.c (f_make_symbol_completion_list): Make "text" and "word"
parameters const.
* infcmd.c (_initialize_infcmd): Make "cmd_name" local const.
* infrun.c (handle_completer): Make "text" and "word" parameters
const.
* interps.c (interpreter_completer): Make "text" and "word"
parameters const.
* language.h (struct language_defn)
<la_make_symbol_completion_list>: Make "text" and "word"
parameters const.
* parse.c (parse_exp_1): Move const hack to parse_exp_in_context.
(parse_exp_in_context): Rename to ...
(parse_exp_in_context_1): ... this.
(parse_exp_in_context): Reimplement, with const hack from
parse_exp_1.
(parse_expression_for_completion): Make "string" parameter const.
* printcmd.c (decode_format): Make "string_ptr" parameter pointer
to pointer to const char. Adjust.
(print_command_1): Make "exp" parameter const.
(output_command): Rename to ...
(output_command_const): ... this. Make "exp" parameter const.
(output_command): Reimplement.
(x_command): Adjust.
(display_command): Rename "exp" parameter to "arg". New "exp"
local, const version of "arg".
* python/py-auto-load.c (gdbpy_initialize_auto_load): Make
"cmd_name" local const.
* python/py-cmd.c (cmdpy_destroyer): Cast const away in xfree
call.
(cmdpy_completer): Make "text" and "word" parameters const.
(gdbpy_parse_command_name): Make "prefix_text2" local const.
* python/py-param.c (add_setshow_generic): Make "tmp_name" local
const.
* remote.c (_initialize_remote): Make "cmd_name" local const.
* symtab.c (language_search_unquoted_string): Make "text" and "p"
parameters const. Adjust.
(completion_list_add_fields): Make "sym_text", "text" and "word"
parameters const.
(struct add_name_data) <sym_text, text, word>: Make fields const.
(default_make_symbol_completion_list_break_on): Make "text" and
"word" parameters const. Adjust locals.
(default_make_symbol_completion_list)
(make_symbol_completion_list, make_symbol_completion_type)
(make_symbol_completion_list_fn): Make "text" and "word"
parameters const.
(make_file_symbol_completion_list): Make "text", "word" and
"srcfile" parameters const. Adjust locals.
(add_filename_to_list): Make "text" and "word" parameters const.
(struct add_partial_filename_data) <text, word>: Make fields
const.
(make_source_files_completion_list): Make "text" and "word"
parameters const.
* symtab.h (default_make_symbol_completion_list_break_on)
(default_make_symbol_completion_list, make_symbol_completion_list)
(make_symbol_completion_type enum type_code)
(make_symbol_completion_list_fn make_file_symbol_completion_list)
(make_source_files_completion_list): Change prototype.
* top.c (execute_command): Adjust to pass pointer to pointer to
const char to lookup_cmd, and to deprecated_cmd_warning prototype
change.
(set_verbose): Make "cmdname" local const.
* tracepoint.c (decode_agent_options): Make "exp" parameter const,
and adjust.
(validate_actionline): Make "line" parameter a pointer to const
char, and adjust.
(encode_actions_1): Make "action_exp" local const, and adjust.
(encode_actions): Adjust.
(replace_comma): Delete.
(trace_dump_actions): Make "action_exp" and "next_comma" locals
const, and adjust. Don't frob the action string while splitting
it at commas. Instead, make a copy of each split substring in
turn.
(trace_dump_command): Adjust to validate_actionline prototype
change.
* tracepoint.h (decode_agent_options, decode_agent_options)
(encode_actions, validate_actionline): Change prototypes.
* valprint.h (output_command): Delete declaration.
(output_command_const): Declare.
* value.c (function_destroyer): Cast const away in xfree call.
As a follow up to:
http://sourceware.org/ml/gdb-patches/2013-03/msg00449.html
In a nutshell, casts between 'char **' <-> 'unsigned char **' and
'char **' <-> 'const char **' are invalid.
I grepped for "\*\*) &" and found these. There's another one in
demangle.c, but I've split fixing that one to a separate patch.
I think the ada_decode_symbol change is perhaps the one that could be
surprising. The function's description has this comment, which makes
things much clearer:
The GSYMBOL parameter is "mutable" in the C++ sense: logically
const, but nevertheless modified to a semantically equivalent form
when a decoded name is cached in it. */
const char *
ada_decode_symbol (const struct general_symbol_info *gsymbol)
With that out of the way, I think the patch ends up being pretty
obvious.
Tested on x86_64 Fedora 17.
gdb/
2013-03-13 Pedro Alves <palves@redhat.com>
* ada-lang.c (ada_decode_symbol): Cast away constness of GSYMBOL
rather than casting 'const char * const *' to 'const char **'.
* ada-lex.l (processInt): Make "trailer" local const. Remove
'const char **' cast.
* arm-linux-tdep.c (arm_stap_parse_special_token): Add 'char *'
locals, and use those as strtol output pointer, instead than doing
invalid casts to from 'const char **' to 'char **'.
(_initialize_demangle): Remove cast.
* i386-tdep.c (i386_stap_parse_special_token): : Add 'char *'
locals, and use those as strtol output pointer, instead than doing
invalid casts to from 'const char **' to 'char **'.
* solib-dsbt.c (dsbt_get_initial_loadmaps): Remove 'gdb_byte**'
casts.
* stap-probe.c (stap_parse_register_operand)
(stap_parse_single_operand): Likewise.
pointer to expression string to parse_exp_1.
(create_excep_cond_exprs): Likewise.
* ax-gdb.c (agent_eval_command_one): Likewise.
(maint_agent_printf_command): Likewise.
Constify much of the string handling/parsing.
* breakpoint.c (set_breakpoint_condition): Pass const
pointer to expression string to parse_exp_1.
(update_watchpoint): Likewise.
(parse_cmd_to_aexpr): Constify string handling.
Pass const pointer to parse_exp_1.
(init_breakpoint_sal): Pass const pointer to parse_exp_1.
(find_condition_and_thread): Likewise.
Make TOK const.
(watch_command_1): Make "arg" const.
Constify string handling.
Copy the expression string instead of changing the input
string.
(update_breakpoint_location): Pass const pointer to
parse_exp_1.
* eval.c (parse_and_eval_address): Make "exp" const.
(parse_to_comma_and_eval): Make "expp" const.
(parse_and_eval): Make "exp" const.
* expression.h (parse_expression): Make argument const.
(parse_exp_1): Make first argument const.
* findcmd.c (parse_find_args): Treat "args" as const.
* linespec.c (parse_linespec): Pass const pointer to
linespec_expression_to_pc.
(linespec_expression_to_pc): Make "exp_ptr" const.
* parse.c (parse_exp_1): Make "stringptr" const.
Make a copy of the expression to pass to parse_exp_in_context until
this whole interface can be constified.
(parse_expression): Make "string" const.
* printcmd.c (ui_printf): Treat "arg" as const.
Handle const strings.
* tracepoint.c (validate_actionline): Pass const pointer to
all calls to parse_exp_1.
(encode_actions_1): Likewise.
* value.h (parse_to_comma_and_eval): Make argument const.
(parse_and_eval_address): Likewise.
(parse_and_eval): Likewise.
* varobj.c (varobj_create): Pass const pointer to parse_exp_1.
(varobj_set_value): Likewise.
* cli/cli-cmds.c (disassemble_command): Treat "arg" as const and
constify string handling.
Pass const pointers to parse_and_eval_address and
parse_to_comman_and_eval.
* cli/cli-utils.c (skip_to_space): Rename to ...
(skip_to_space_const): ... this. Handle const strings.
* cli/cli-utils.h (skip_to_space): Turn into macro which invokes
skip_to_space_const.
(skip_to_space_const): Declare.
* common/format.c (parse_format_string): Make "arg" const.
Handle const strings.
* common/format.h (parse_format_string): Make "arg" const.
* gdbserver/ax.c (ax_printf): Make "format" const.
* python/python.c (gdbpy_parse_and_eval): Do not make a copy
of the expression string.
* ada-lang.c (user_select_syms): Replace symtab->filename refererences
by symtab_to_filename_for_display calls.
* breakpoint.c (print_breakpoint_location, resolve_sal_pc): Likewise.
(clear_command): New variable sal_fullname, initialize it. Replace
compare_filenames_for_search by filename_cmp with sal_fullname.
(say_where, update_static_tracepoint): Replace symtab->filename
refererences by symtab_to_filename_for_display calls.
* cli/cli-cmds.c (edit_command, list_command, ambiguous_line_spec):
Likewise.
* dwarf2read.c: Include source.h.
(fixup_go_packaging): Replace symtab->filename refererences by
symtab_to_filename_for_display calls.
* linespec.c (add_sal_to_sals): Rename variable filename to fullname.
Replace symtab->filename refererences by symtab_to_filename_for_display
calls.
(create_sals_line_offset, convert_linespec_to_sals): New variable
fullname, initialize it, replace symtab->filename reference by the
variable.
* linux-fork.c: Include source.h.
(info_checkpoints_command): Replace symtab->filename refererences by
symtab_to_filename_for_display calls.
* macroscope.c (sal_macro_scope): Replace symtab->filename refererences
by symtab_to_filename_for_display calls.
* mdebugread.c: Include source.h.
(psymtab_to_symtab_1): Replace symtab->filename refererences by
symtab_to_filename_for_display calls.
* mi/mi-cmd-file.c (mi_cmd_file_list_exec_source_file)
(mi_cmd_file_list_exec_source_files): Likewise.
* printcmd.c: Include source.h.
(build_address_symbolic): Replace symtab->filename refererences by
symtab_to_filename_for_display calls.
* psymtab.c (partial_map_symtabs_matching_filename)
(read_psymtabs_with_fullname): Call compare_filenames_for_search also
with psymtab_to_fullname.
* python/py-symtab.c (stpy_str): Replace symtab->filename refererences
by symtab_to_filename_for_display calls.
(stpy_get_filename): New variable filename, initialize it, use instead
of symtab->filename refererences.
(salpy_str): Make variable filename const char *. Replace
symtab->filename refererences by symtab_to_filename_for_display calls.
* skip.c: Include source.h and filenames.h.
(skip_file_command): Remove const from the symtab variable. Replace
symtab->filename refererences by symtab_to_fullname call.
(function_name_is_marked_for_skip): New variables searched_for_fullname
and fullname. Use them to search also with symtab's fullname.
* source.c (find_source_lines): Replace symtab->filename refererences
by symtab_to_filename_for_display calls.
(print_source_lines_base): New variable filename, use it instead of
symtab->filename. Replace symtab->filename refererences by
symtab_to_filename_for_display calls.
(line_info, forward_search_command): Replace symtab->filename
refererences by symtab_to_filename_for_display calls.
(reverse_search_command): Replace symtab->filename refererences by
symtab_to_filename_for_display calls. New variable filename for it.
* stack.c (frame_info): Likewise.
* symmisc.c: Include source.h.
(dump_objfile, dump_symtab_1, maintenance_print_symbols)
(maintenance_info_symtabs): Replace symtab->filename refererences by
symtab_to_filename_for_display calls.
* symtab.c (iterate_over_some_symtabs): Call
compare_filenames_for_search also with symtab_to_fullname.
(lookup_symbol_aux_quick, basic_lookup_transparent_type_quick): Replace
symtab->filename refererences by symtab_to_filename_for_display calls.
(find_line_symtab): Replace symtab->filename refererences by
symtab_to_filename_for_display calls.
(file_matches): Replace filename_cmp by compare_filenames_for_search.
(print_symbol_info): Make the last parameter const char *. New
variable s_filename. Use it in the function.
(symtab_symbol_info): Make the last_filename variable const char *.
Replace symtab->filename refererences by symtab_to_filename_for_display
calls.
(rbreak_command): New variable fullname. Use it. Replace
symtab->filename refererence by symtab_to_filename_for_display call.
* tracepoint.c (set_traceframe_context, trace_find_line_command)
(print_one_static_tracepoint_marker): Replace symtab->filename
refererences by symtab_to_filename_for_display calls.
* tui/tui-source.c (tui_set_source_content): New variables filename and
s_filename. Replace symtab->filename refererences by this variable.
Replace other symtab->filename refererences by
symtab_to_filename_for_display calls.
* symfile.c (obsavestring): Remove.
* ada-exp.y: Use obstack_copy0, not obsavestring.
* ada-lang.c: Use obstack_copy0, not obsavestring.
* coffread.c: Use obstack_copy0, not obsavestring.
* cp-namespace.c: Use obstack_copy0, not obsavestring.
* dbxread.c: Use obstack_copy0, not obsavestring.
* dwarf2read.c: Use obstack_copy0, not obsavestring.
* jit.c: Use obstack_copy0, not obsavestring.
* mdebugread.c: Use obstack_copy0, not obsavestring.
* psymtab.c: Use obstack_copy0, not obsavestring.
* stabsread.c: Use obstack_copy0, not obsavestring.
* xcoffread.c: Use obstack_copy0, not obsavestring.
Two modifications:
1. The addition of 2013 to the copyright year range for every file;
2. The use of a single year range, instead of potentially multiple
year ranges, as approved by the FSF.
The following Ada type:
type Circle is new Shape and Drawable with record
Center : Point;
Radius : Natural;
end record;
...is displayed as follow in GDB:
(gdb) ptype circle
type = new classes.shape with record
V51s: ada.tags.interface_tag;
center: classes.point;
radius: natural;
end record
V51s is an internal field that is of no interest for the user. It should
not be displayed.
gdb/ChangeLog:
* ada-lang.c (ada_is_interface_tag): New function.
(ada_is_ignored_field): Add interface tags to the list
of ignored fields.
For displaying the full view of a class-wide object, GDB relies on
the assumption that this view will have the same address as the
address of the object. In the case of simple inheritance, this
assumption is correct; the proper type is deduced by decoding
the tag of the object and converting the result to this full-view
type.
Consider for example an abstract class Shape, a child Circle
which implements an interface Drawable, and the corresponding
following objects:
My_Circle : Circle := ((1, 2), 3);
My_Shape : Shape'Class := Shape'Class (My_Circle);
My_Drawable : Drawable'Class := Drawable'Class (My_Circle);
To display My_Shape, the debugger first extracts the tag (an internal
field, usually the first one of the record):
(gdb) p my_shape'address
$2 = (system.address) 0x8063e28
(gdb) x/x my_shape'address
0x8063e28 <classes__my_shape>: 0x08059ec4
Then the type specific data and the expanded name of the tag is read
from there:
(gdb) p my_shape'tag
$3 = (access ada.tags.dispatch_table) 0x8059ec4 (classes.circle)
To get the full view, the debugger converts to the corresponding type:
(gdb) p {classes.circle}0x8063e28
$4 = (center => (x => 1, y => 2), radius => 3)
Now, in the case of multiple inheritance, the assumption does not hold
anymore. The address that we have usually points to some
place lower. The offset to the original address is saved in the field
Offset_To_Top of the metadata that are above the tag, at address
obj'tag - 8. In the case of my_shape, this offset is 0:
(gdb) x/x my_shape'tag - 8
0x8059ebc <classes__circleT+12>: 0x00000000
...but in the case of an interface-wide object, it is not null:
(gdb) x/x my_drawable'tag - 8
0x8063b28 <classes__classes__circle_classes__drawable1T56s+12>: 0x00000004
(gdb) p {classes.circle}(my_drawable'address - 4)
$7 = (center => (x => 1, y => 2), radius => 3)
The following change handles this relocation in the most common cases.
Remaining cases that are still to be investigated are signaled by
comments.
gdb/ChangeLog:
* ada-lang.h (ada_tag_value_at_base_address): New function
declaration.
* ada-lang.c (is_ada95_tag, ada_tag_value_at_base_address):
New functions.
(ada_to_fixed_type_1, ada_evaluate_subexp): Let ada_tag_base_address
relocate the class-wide value if need be.
(ada_value_struct_elt, ada_value_ind, ada_coerce_ref):
Let ada_tag_value_at_base_address relocate the class-wide access/ref
before dereferencing it.
* ada-valprint.c (ada_val_print_1): Relocate to base address
before displaying the content of an interface-wide ref.
gdb/testsuite/ChangeLog:
* gdb.ada/ptype_tagged_param.exp: Adjust expected output in
ptype test.
In the evaluation of an expression in Ada mode, the default case
unwraps the argument unconditionally. For an object of a variant
record type, this unwrapping builds a fixed type from the
specification of the variant type and the actual values of the
object's discriminants. It means that unwrapping needs the "proper"
value for the object, not just a zero value with the proper type.
When not in EVAL_NORMAL, we cannot assume that the evaluation returns
such a proper value; it may well return a zero value of the
appropriate type e.g in EVAL_AVOID_SIDE_EFFECTS. It is wrong to try to
unwrap in that case.
In particular, a problem shows up when using expression of the form
{VARIANT_TYPE}OBJ. GDB first evaluates this expression in
EVAL_AVOID_SIDE_EFFECTS to compute the type, the evaluation of OBJ
in most cases returns a zero value of its type, and as UNOP_MEMVAL
is mapped to the default case its evaluation ends up trying to
read memory around address 0.
gdb/ChangeLog:
* ada-lang.c (ada_evaluate_subexp): Unwrap only in EVAL_NORMAL.
We use a list of regular expressions to match a symtab filenames
against the names of the files in the Ada runtime. These regular
expressions do assume that the filename is a basename, however.
So make sure to evaluate these regular expressions against
the symtab's filename.
Without this patch, we run into problems when the Ada runtime was built
using a project file (through gprbuild).
gdb/ChangeLog:
* ada-lang.c (is_known_support_routine): Use lbasename when
matching the symtab's filename against
known_runtime_file_name_patterns.
Given the following variable declaration...
Www : Wide_String := "12345";
... this patch allows the following assignment to work:
(gdb) set variable www := "qwert"
Without this patch, the debugger rejects the assignment because
the size of the array elements are different:
(gdb) set www := "asdfg"
Incompatible types in assignment
(on the lhs, we have an array of 2-bytes elements, and on the rhs,
we have a standard 1-byte string).
gdb/ChangeLog:
* ada-lang.c (ada_same_array_size_p): New function.
(ada_promote_array_of_integrals): New function.
(coerce_for_assign): Add handling of arrays where the elements
are integrals of a smaller size than the size of the target
array element type.
gdb/testsuite/ChangeLog:
* gdb.ada/set_wstr: New testcase.
gdb/ChangeLog:
* ada-lang.c (ada_template_to_fixed_record_type_1): Do not
strip typedef layer when computing the fixed type's field type,
only when computing its size.
gdb/testsuite/ChangeLog:
* gdb.ada/unc_arr_ptr_in_var_rec: New testcase.
Assuming the following declarations:
type Discriminants_Record (A : Integer; B : Boolean) is record
C : Float;
end record;
Z : Discriminants_Record := (A => 1, B => False, C => 2.0);
If variable Z is not used, and the compiler optimizes it out,
GDB would crash as follow:
(gdb) print Z
/[...]/gdb/valops.c:1121: internal-error: Unexpected lazy value type.
This is because the ada-lang module forgot to set the optimized_out
flag in the value returned by ada_evaluate_subexp during the value's
"fixing" process. Later on, when trying to print the resulting value,
GDB finds that the value is still lazily allocated, and thus tries to
fetch it. But this is not allowed for not_lval values, hence the internal
error.
gdb/ChangeLog:
* ada-lang.c (coerce_unspec_val_to_type): Make sure that
the optimized_out flag is preserved.
gdb/testsuite/ChangeLog:
* gdb.ada/optim_drec: New testcase.
The code for handling calls to internal functions (esp., Python
functions) and for handling STT_GNU_IFUNC had not been added to the Ada
expression evaluator. This change adapts them from eval.c.
gdb/Changelog:
* ada-lang.c (ada_evaluate_subexp): Add cases for
TYPE_CODE_INTERNAL_FUNCTION and for TYPE_GNU_IFUNC, following
their treatment in eval.c.
PR symtab/7259:
* ada-exp.y (convert_char_literal): Use TYPE_FIELD_ENUMVAL.
* ada-lang.c (ada_discrete_type_high_bound)
(ada_discrete_type_low_bound): Use TYPE_FIELD_ENUMVAL for
TYPE_CODE_ENUM.
(ada_identical_enum_types_p): Use TYPE_FIELD_ENUMVAL.
(pos_atr, value_val_atr): Use TYPE_FIELD_ENUMVAL for TYPE_CODE_ENUM.
* ada-typeprint.c (print_enum_type): Change variable lastval to LONGEST.
Use TYPE_FIELD_ENUMVAL.
* ada-valprint.c (print_optional_low_bound, ada_print_scalar)
(ada_val_print_1): Use TYPE_FIELD_ENUMVAL for TYPE_CODE_ENUM.
* c-typeprint.c (c_type_print_base): Move variable lastval to inner
block, change it to LONGEST. Use TYPE_FIELD_ENUMVAL for
TYPE_CODE_ENUM.
* coffread.c (coff_read_enum_type): Use SET_FIELD_ENUMVAL.
* dwarf2read.c (process_enumeration_scope): Likewise.
* gdb-gdb.py (TypeFlagsPrinter): Use field.enumval instead of
field.bitpos.
(class StructMainTypePrettyPrinter): Support also
FIELD_LOC_KIND_ENUMVAL.
* gdbtypes.c (get_discrete_bounds): Use TYPE_FIELD_ENUMVAL for
TYPE_CODE_ENUM.
(recursive_dump_type): Use TYPE_FIELD_ENUMVAL for TYPE_CODE_ENUM.
(copy_type_recursive): Support also FIELD_LOC_KIND_ENUMVAL.
* gdbtypes.h (enum field_loc_kind): New FIELD_LOC_KIND_ENUMVAL.
(struct main_type.flds_bnds.fields.loc): Adjust bitpos comment. New
field enumval.
(struct main_type.flds_bnds.bields): Adjust loc_kind and bitsize to
accommodate enumval.
(struct call_site): Adjust loc_kind to accommodate enumval.
(FIELD_ENUMVAL, FIELD_ENUMVAL_LVAL, SET_FIELD_ENUMVAL)
(TYPE_FIELD_ENUMVAL): New macros.
* m2-typeprint.c (m2_enum): Use TYPE_FIELD_ENUMVAL.
* mdebugread.c (parse_symbol): Use TYPE_FIELD_ENUMVAL for
TYPE_CODE_ENUM.
* p-typeprint.c (pascal_type_print_base): Likewise.
* python/lib/gdb/printing.py (class FlagEnumerationPrinter): Use
enumval.
* python/lib/gdb/types.py (make_enum_dict): Likewise.
* python/py-type.c (convert_field): New variable addrstring. Use
TYPE_FIELD_ENUMVAL for TYPE_CODE_ENUM.
(check_types_equal): Support also FIELD_LOC_KIND_ENUMVAL.
* stabsread.c (read_enum_type): Use SET_FIELD_ENUMVAL.
* typepint.c (print_type_scalar): Use TYPE_FIELD_ENUMVAL for
TYPE_CODE_ENUM.
* valprint.c (generic_val_print): Likewise.
gdb/testsuite/
PR symtab/7259:
* gdb.base/enumval.c: New test case.
* gdb.base/enumval.exp: New test case.
* gdb.python/py-type.exp (test_enums): Use field.enumval instead of
field.bitpos.
Do not rely on FIELD_LOC_KIND_BITPOS being zero.
* ada-lang.c (ada_template_to_fixed_record_type_1): Replace
TYPE_FIELD_BITPOS used as lvalue by SET_FIELD_BITPOS.
* gdbtypes.c (append_flags_type_flag): Likewise, twice.
* jv-lang.c (java_link_class_type): Likewise, once.
* stabsread.c (read_enum_type): Likewise.
This renaming allows us to have variable names that are consistent
with the names of the parameters in the functions where these
variables are used. This also allows us to avoid a -Wshadow warning
in the case of variable "wild_match", which is now renamed to
"wild_match_p".
gdb/ChangeLog:
-Wshadow warning fix.
* ada-lang.c (ada_make_symbol_completion_list): Rename parameters
"wild_match" and "encoded" into "wild_match_p" and "encoded_p".
Adjust code accordingly.
... This is mostly to be consistent with the style used for the other
parameter of the same kind ("wild_match_p") in that function.
gdb/ChangeLog:
* ada-lang.c (symbol_completion_add): Rename parameter
"encoded" into "encoded_p". Ajust code and documentation
accordingly.
... This is mostly to be consistent with the style used for the other
parameter of the same kind ("wild_match_p") in that function.
gdb/ChangeLog:
* ada-lang.c (symbol_completion_match): Rename parameter
"encoded" into "encoded_p". Ajust code and documentation
accordingly.
... to avoid a -Wshadow warning with a symbol exported by BFD.
gdb/ChangeLog:
-Wshadow warning fix.
* ada-lang.c (ada_lookup_encoded_symbol): Rename parameter
"symbol_info" into "info". Adjust code accordingly.
(ada_lookup_symbol): Likewise.
This patch mostly removes a few trailing spaces.
gdb/ChangeLog:
* ada-lang.c (ada_lookup_symbol_list): Minor reformatting
of this function's documentation.
... to avoid -Wshadow warning...
gdb/ChangeLog:
-Wshadow warning fix.
* ada-lang.c (ada_add_local_symbols): Rename "wild_match"
parameter into "wild_match_p". Adjust code accordingly.
Document this parameter in the function description.
This makes ada_lookup_encoded_symbol more consistent with other functions
such as ada_lookup_symbol_list, and also makes it clearer in the code
using that function that symbol and block are related.
gdb/ChangeLog:
* ada-lang.c (ada_lookup_encoded_symbol): Now returns void.
Replace block_found argument by symbol_info. Adjust
implementation accordingly. Add function documentation.
(ada_lookup_symbol): Adjust to new ada_lookup_encoded_symbol.
Fix documentation.
* ada-lang.h (ada_lookup_encoded_symbol): Update declaration.
* ada-exp.y (write_object_renaming): Adjust to new
ada_lookup_encoded_symbol API.
Consider the following declaration:
type Small is new Integer range 0 .. 2 ** 4 - 1;
type Simple_Array is array (1 .. 4) of Small;
pragma Pack (Simple_Array);
SA : Simple_Array := (1, 2, 3, 4);
Trying to change the value of one of the elements in the packed array
causes the debugger to crash:
(gdb) set sa(3) := 9
[1] 4880 segmentation fault gdb -q foo
The circumstances leading to the crash are as follow:
. ada_evaluate_subexp creates a value corresponding to "sa(3)".
. ada_evaluate_subexp then tries to assign 9 to this value, and
for this calls value_assign (via ada_value_assign).
. Because the array is packed, the destination value is 3 bits long,
and as a result, value_assign uses the parent to determine that
element byte address and offset:
| if (value_bitsize (toval))
| {
| struct value *parent = value_parent (toval);
|
| changed_addr = value_address (parent) + value_offset (toval);
The destination value (corresponding to "sa(3)") was incorrectly created
by ada-lang.c:ada_value_primitive_packed_val, because the "parent" was
left as NULL. So, when we try to dereference it to get the parent address,
GDB crashed.
The first part of the fix therefore consists in setting that field.
This required the addition of a new "setter" in value.[hc]. It fixes
the crash, but is still not sufficient for the assignment to actually
work.
The second part of the problem came from the fact that value_assign
seems to expect the "child"'s address to be equal to the parent's address,
with the difference being the offset. Unfortunately, this requirement was
not followed by ada_value_primitive_packed_val, so the second part of
the fix consisted in fixing that.
Still, this was not sufficient, because it caused a regression when
trying to perform an aggregate assignment of a packed array of packed
record. The key element here is the nesting of packed entities.
Looking at the way ada_value_primitive_packed_val creates the value
of each sub-component, one can see that the value's offset is set
to the offset compared to the start of the parent. This was meant to
match what value_primitive_field does as well.
So, with our array of records, if the record offset was 2, and if
the field we're interested in that record is at offset 1, the record
value's offset would be set to 2, and the field value's offset would
be set to 1. But the address for both values would be left to the
array's address. This is where things start breaking down, because
the value_address function for our field value would return the
address of the array + 1, instead of + 3.
This is what causes the final issue, here, because ada-lang.c's
value_assign_to_component needs to compute the offset of the
subcomponent compared to the top-level aggregate's start address
(the array in our case). And it does so by subtracting the array's
address from the sub-component's address. When you have two levels
of packed components, and the mid-level component is at an offset of
the top-level component, things didn't work, because the component's
address was miscomputed (the parent's offset is missing).
The fix consists is fixing value_address to match the work done by
value_primitive_field (where we ignore the parent's offset).
gdb/ChangeLog:
* value.h (set_value_parent): Add declaration.
* value.c (set_value_parent): New function.
(value_address): If VALUE->PARENT is not NULL, then use it as
the base address instead of VALUE->LOCATION.address.
* ada-lang.c (ada_value_primitive_packed_val): Keep V's address
the same as OBJ's address. Adjust V's offset accordingly.
Set V's parent.
gdb/testsuite/ChangeLog:
* gdb.ada/set_pckd_arr_elt: New testcase.
The purpose of this patch is to better support renamings in the
"info locals" command. Consider ...
procedure Foo is
GV : Integer renames Pck.Global_Variable;
begin
Increment (GV); -- STOP
end Foo;
... Pck.Global_Variable is just an integer. After having stopped at
the "STOP" line, "info locals" yields:
(gdb) info locals
gv = <error reading variable gv (Cannot access memory at address 0xffffffffffffffff)>
In reality, two things are happening:
(1) Variable "GV" does not exist, which is normal, since there is
"GV" the renaming of another variable;
(2) But to allow the user access to that renaming the same way
the code has, the compiler produces an artificial variable
whose name encodes the renaming:
gv___XR_pck__global_variable___XE
For practical reasons, the artificial variable itself is given
irrelevant types and addresses.
But the "info locals" command does not act as if it was a short-cut
of "foreach VAR in locals, print VAR". Instead it gets the value of
each VAR directly, which does not work in this case, since the variable
is artificial and needs to be decoded first.
This patch makes the "read_var_value" routine language-specific.
The old implementation of "read_var_value" gets renamed to
"default_read_var_value" and all languages now use it (unchanged
behavior), except for Ada. In Ada, the new function ada_read_var_value
checks if we have a renaming, and if so, evaluates its value, or else
defers to default_read_var_value.
gdb/ChangeLog:
* language.h (struct language_defn): New "method" la_read_var_value.
* findvar.c: #include "language.h".
(default_read_var_value): Renames read_var_value. Rewrite
function description.
(read_var_value): New function.
* value.h (default_read_var_value): Add prototype.
* ada-lang.c (ada_read_renaming_var_value, ada_read_var_value):
New functions.
(ada_language_defn): Add entry for la_read_var_value.
* c-lang.c, d-lang.c, f-lang.c, jv-lang.c, language.c,
* m2-lang.c, objc-lang.c, opencl-lang.c, p-lang.c: Update
language_defn structures to add entry for new la_read_var_value
field.
This is a minor improvement in ada_find_renaming_symbol: What we were
doing was going from a symbol, get its name, and then search for
renamings. But if the original symbol was already itself a renaming,
then we'd look the symbol up again to return it. Since we had the
symbol in the first place, we shouldn't need to look it up again.
This is what this patch does: Modify ada_find_renaming_symbol to
take a symbol instead of the symbol's (linkage) name, and then updates
the one caller.
gdb/ChangeLog:
* ada-lang.h (ada_find_renaming_symbol): Replace parameter
"name" with "struct symbol *name_sym".
* ada-exp.y (write_var_or_type): Update call to
ada_find_renaming_symbol.
* ada-lang.c (ada_find_renaming_symbol): Replace parameter
"name" with "struct symbol *name_sym". Adjust Implementation
accordingly. Adjust the function documentation.
Keith Seitz