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ada-lang.c
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ada-lang.c
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/* Ada language support routines for GDB, the GNU debugger.
Copyright (C) 1992-2019 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include <ctype.h>
#include "demangle.h"
#include "gdb_regex.h"
#include "frame.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "gdbcmd.h"
#include "expression.h"
#include "parser-defs.h"
#include "language.h"
#include "varobj.h"
#include "c-lang.h"
#include "inferior.h"
#include "symfile.h"
#include "objfiles.h"
#include "breakpoint.h"
#include "gdbcore.h"
#include "hashtab.h"
#include "gdb_obstack.h"
#include "ada-lang.h"
#include "completer.h"
#include <sys/stat.h>
#include "ui-out.h"
#include "block.h"
#include "infcall.h"
#include "dictionary.h"
#include "annotate.h"
#include "valprint.h"
#include "source.h"
#include "observable.h"
#include "vec.h"
#include "stack.h"
#include "gdb_vecs.h"
#include "typeprint.h"
#include "namespace.h"
#include "psymtab.h"
#include "value.h"
#include "mi/mi-common.h"
#include "arch-utils.h"
#include "cli/cli-utils.h"
#include "common/function-view.h"
#include "common/byte-vector.h"
#include <algorithm>
/* Define whether or not the C operator '/' truncates towards zero for
differently signed operands (truncation direction is undefined in C).
Copied from valarith.c. */
#ifndef TRUNCATION_TOWARDS_ZERO
#define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2)
#endif
static struct type *desc_base_type (struct type *);
static struct type *desc_bounds_type (struct type *);
static struct value *desc_bounds (struct value *);
static int fat_pntr_bounds_bitpos (struct type *);
static int fat_pntr_bounds_bitsize (struct type *);
static struct type *desc_data_target_type (struct type *);
static struct value *desc_data (struct value *);
static int fat_pntr_data_bitpos (struct type *);
static int fat_pntr_data_bitsize (struct type *);
static struct value *desc_one_bound (struct value *, int, int);
static int desc_bound_bitpos (struct type *, int, int);
static int desc_bound_bitsize (struct type *, int, int);
static struct type *desc_index_type (struct type *, int);
static int desc_arity (struct type *);
static int ada_type_match (struct type *, struct type *, int);
static int ada_args_match (struct symbol *, struct value **, int);
static struct value *make_array_descriptor (struct type *, struct value *);
static void ada_add_block_symbols (struct obstack *,
const struct block *,
const lookup_name_info &lookup_name,
domain_enum, struct objfile *);
static void ada_add_all_symbols (struct obstack *, const struct block *,
const lookup_name_info &lookup_name,
domain_enum, int, int *);
static int is_nonfunction (struct block_symbol *, int);
static void add_defn_to_vec (struct obstack *, struct symbol *,
const struct block *);
static int num_defns_collected (struct obstack *);
static struct block_symbol *defns_collected (struct obstack *, int);
static struct value *resolve_subexp (expression_up *, int *, int,
struct type *);
static void replace_operator_with_call (expression_up *, int, int, int,
struct symbol *, const struct block *);
static int possible_user_operator_p (enum exp_opcode, struct value **);
static const char *ada_op_name (enum exp_opcode);
static const char *ada_decoded_op_name (enum exp_opcode);
static int numeric_type_p (struct type *);
static int integer_type_p (struct type *);
static int scalar_type_p (struct type *);
static int discrete_type_p (struct type *);
static enum ada_renaming_category parse_old_style_renaming (struct type *,
const char **,
int *,
const char **);
static struct symbol *find_old_style_renaming_symbol (const char *,
const struct block *);
static struct type *ada_lookup_struct_elt_type (struct type *, const char *,
int, int);
static struct value *evaluate_subexp_type (struct expression *, int *);
static struct type *ada_find_parallel_type_with_name (struct type *,
const char *);
static int is_dynamic_field (struct type *, int);
static struct type *to_fixed_variant_branch_type (struct type *,
const gdb_byte *,
CORE_ADDR, struct value *);
static struct type *to_fixed_array_type (struct type *, struct value *, int);
static struct type *to_fixed_range_type (struct type *, struct value *);
static struct type *to_static_fixed_type (struct type *);
static struct type *static_unwrap_type (struct type *type);
static struct value *unwrap_value (struct value *);
static struct type *constrained_packed_array_type (struct type *, long *);
static struct type *decode_constrained_packed_array_type (struct type *);
static long decode_packed_array_bitsize (struct type *);
static struct value *decode_constrained_packed_array (struct value *);
static int ada_is_packed_array_type (struct type *);
static int ada_is_unconstrained_packed_array_type (struct type *);
static struct value *value_subscript_packed (struct value *, int,
struct value **);
static struct value *coerce_unspec_val_to_type (struct value *,
struct type *);
static int lesseq_defined_than (struct symbol *, struct symbol *);
static int equiv_types (struct type *, struct type *);
static int is_name_suffix (const char *);
static int advance_wild_match (const char **, const char *, int);
static bool wild_match (const char *name, const char *patn);
static struct value *ada_coerce_ref (struct value *);
static LONGEST pos_atr (struct value *);
static struct value *value_pos_atr (struct type *, struct value *);
static struct value *value_val_atr (struct type *, struct value *);
static struct symbol *standard_lookup (const char *, const struct block *,
domain_enum);
static struct value *ada_search_struct_field (const char *, struct value *, int,
struct type *);
static struct value *ada_value_primitive_field (struct value *, int, int,
struct type *);
static int find_struct_field (const char *, struct type *, int,
struct type **, int *, int *, int *, int *);
static int ada_resolve_function (struct block_symbol *, int,
struct value **, int, const char *,
struct type *);
static int ada_is_direct_array_type (struct type *);
static void ada_language_arch_info (struct gdbarch *,
struct language_arch_info *);
static struct value *ada_index_struct_field (int, struct value *, int,
struct type *);
static struct value *assign_aggregate (struct value *, struct value *,
struct expression *,
int *, enum noside);
static void aggregate_assign_from_choices (struct value *, struct value *,
struct expression *,
int *, LONGEST *, int *,
int, LONGEST, LONGEST);
static void aggregate_assign_positional (struct value *, struct value *,
struct expression *,
int *, LONGEST *, int *, int,
LONGEST, LONGEST);
static void aggregate_assign_others (struct value *, struct value *,
struct expression *,
int *, LONGEST *, int, LONGEST, LONGEST);
static void add_component_interval (LONGEST, LONGEST, LONGEST *, int *, int);
static struct value *ada_evaluate_subexp (struct type *, struct expression *,
int *, enum noside);
static void ada_forward_operator_length (struct expression *, int, int *,
int *);
static struct type *ada_find_any_type (const char *name);
static symbol_name_matcher_ftype *ada_get_symbol_name_matcher
(const lookup_name_info &lookup_name);
/* The result of a symbol lookup to be stored in our symbol cache. */
struct cache_entry
{
/* The name used to perform the lookup. */
const char *name;
/* The namespace used during the lookup. */
domain_enum domain;
/* The symbol returned by the lookup, or NULL if no matching symbol
was found. */
struct symbol *sym;
/* The block where the symbol was found, or NULL if no matching
symbol was found. */
const struct block *block;
/* A pointer to the next entry with the same hash. */
struct cache_entry *next;
};
/* The Ada symbol cache, used to store the result of Ada-mode symbol
lookups in the course of executing the user's commands.
The cache is implemented using a simple, fixed-sized hash.
The size is fixed on the grounds that there are not likely to be
all that many symbols looked up during any given session, regardless
of the size of the symbol table. If we decide to go to a resizable
table, let's just use the stuff from libiberty instead. */
#define HASH_SIZE 1009
struct ada_symbol_cache
{
/* An obstack used to store the entries in our cache. */
struct obstack cache_space;
/* The root of the hash table used to implement our symbol cache. */
struct cache_entry *root[HASH_SIZE];
};
static void ada_free_symbol_cache (struct ada_symbol_cache *sym_cache);
/* Maximum-sized dynamic type. */
static unsigned int varsize_limit;
static const char ada_completer_word_break_characters[] =
#ifdef VMS
" \t\n!@#%^&*()+=|~`}{[]\";:?/,-";
#else
" \t\n!@#$%^&*()+=|~`}{[]\";:?/,-";
#endif
/* The name of the symbol to use to get the name of the main subprogram. */
static const char ADA_MAIN_PROGRAM_SYMBOL_NAME[]
= "__gnat_ada_main_program_name";
/* Limit on the number of warnings to raise per expression evaluation. */
static int warning_limit = 2;
/* Number of warning messages issued; reset to 0 by cleanups after
expression evaluation. */
static int warnings_issued = 0;
static const char *known_runtime_file_name_patterns[] = {
ADA_KNOWN_RUNTIME_FILE_NAME_PATTERNS NULL
};
static const char *known_auxiliary_function_name_patterns[] = {
ADA_KNOWN_AUXILIARY_FUNCTION_NAME_PATTERNS NULL
};
/* Maintenance-related settings for this module. */
static struct cmd_list_element *maint_set_ada_cmdlist;
static struct cmd_list_element *maint_show_ada_cmdlist;
/* Implement the "maintenance set ada" (prefix) command. */
static void
maint_set_ada_cmd (const char *args, int from_tty)
{
help_list (maint_set_ada_cmdlist, "maintenance set ada ", all_commands,
gdb_stdout);
}
/* Implement the "maintenance show ada" (prefix) command. */
static void
maint_show_ada_cmd (const char *args, int from_tty)
{
cmd_show_list (maint_show_ada_cmdlist, from_tty, "");
}
/* The "maintenance ada set/show ignore-descriptive-type" value. */
static int ada_ignore_descriptive_types_p = 0;
/* Inferior-specific data. */
/* Per-inferior data for this module. */
struct ada_inferior_data
{
/* The ada__tags__type_specific_data type, which is used when decoding
tagged types. With older versions of GNAT, this type was directly
accessible through a component ("tsd") in the object tag. But this
is no longer the case, so we cache it for each inferior. */
struct type *tsd_type;
/* The exception_support_info data. This data is used to determine
how to implement support for Ada exception catchpoints in a given
inferior. */
const struct exception_support_info *exception_info;
};
/* Our key to this module's inferior data. */
static const struct inferior_data *ada_inferior_data;
/* A cleanup routine for our inferior data. */
static void
ada_inferior_data_cleanup (struct inferior *inf, void *arg)
{
struct ada_inferior_data *data;
data = (struct ada_inferior_data *) inferior_data (inf, ada_inferior_data);
if (data != NULL)
xfree (data);
}
/* Return our inferior data for the given inferior (INF).
This function always returns a valid pointer to an allocated
ada_inferior_data structure. If INF's inferior data has not
been previously set, this functions creates a new one with all
fields set to zero, sets INF's inferior to it, and then returns
a pointer to that newly allocated ada_inferior_data. */
static struct ada_inferior_data *
get_ada_inferior_data (struct inferior *inf)
{
struct ada_inferior_data *data;
data = (struct ada_inferior_data *) inferior_data (inf, ada_inferior_data);
if (data == NULL)
{
data = XCNEW (struct ada_inferior_data);
set_inferior_data (inf, ada_inferior_data, data);
}
return data;
}
/* Perform all necessary cleanups regarding our module's inferior data
that is required after the inferior INF just exited. */
static void
ada_inferior_exit (struct inferior *inf)
{
ada_inferior_data_cleanup (inf, NULL);
set_inferior_data (inf, ada_inferior_data, NULL);
}
/* program-space-specific data. */
/* This module's per-program-space data. */
struct ada_pspace_data
{
/* The Ada symbol cache. */
struct ada_symbol_cache *sym_cache;
};
/* Key to our per-program-space data. */
static const struct program_space_data *ada_pspace_data_handle;
/* Return this module's data for the given program space (PSPACE).
If not is found, add a zero'ed one now.
This function always returns a valid object. */
static struct ada_pspace_data *
get_ada_pspace_data (struct program_space *pspace)
{
struct ada_pspace_data *data;
data = ((struct ada_pspace_data *)
program_space_data (pspace, ada_pspace_data_handle));
if (data == NULL)
{
data = XCNEW (struct ada_pspace_data);
set_program_space_data (pspace, ada_pspace_data_handle, data);
}
return data;
}
/* The cleanup callback for this module's per-program-space data. */
static void
ada_pspace_data_cleanup (struct program_space *pspace, void *data)
{
struct ada_pspace_data *pspace_data = (struct ada_pspace_data *) data;
if (pspace_data->sym_cache != NULL)
ada_free_symbol_cache (pspace_data->sym_cache);
xfree (pspace_data);
}
/* Utilities */
/* If TYPE is a TYPE_CODE_TYPEDEF type, return the target type after
all typedef layers have been peeled. Otherwise, return TYPE.
Normally, we really expect a typedef type to only have 1 typedef layer.
In other words, we really expect the target type of a typedef type to be
a non-typedef type. This is particularly true for Ada units, because
the language does not have a typedef vs not-typedef distinction.
In that respect, the Ada compiler has been trying to eliminate as many
typedef definitions in the debugging information, since they generally
do not bring any extra information (we still use typedef under certain
circumstances related mostly to the GNAT encoding).
Unfortunately, we have seen situations where the debugging information
generated by the compiler leads to such multiple typedef layers. For
instance, consider the following example with stabs:
.stabs "pck__float_array___XUP:Tt(0,46)=s16P_ARRAY:(0,47)=[...]"[...]
.stabs "pck__float_array___XUP:t(0,36)=(0,46)",128,0,6,0
This is an error in the debugging information which causes type
pck__float_array___XUP to be defined twice, and the second time,
it is defined as a typedef of a typedef.
This is on the fringe of legality as far as debugging information is
concerned, and certainly unexpected. But it is easy to handle these
situations correctly, so we can afford to be lenient in this case. */
static struct type *
ada_typedef_target_type (struct type *type)
{
while (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
type = TYPE_TARGET_TYPE (type);
return type;
}
/* Given DECODED_NAME a string holding a symbol name in its
decoded form (ie using the Ada dotted notation), returns
its unqualified name. */
static const char *
ada_unqualified_name (const char *decoded_name)
{
const char *result;
/* If the decoded name starts with '<', it means that the encoded
name does not follow standard naming conventions, and thus that
it is not your typical Ada symbol name. Trying to unqualify it
is therefore pointless and possibly erroneous. */
if (decoded_name[0] == '<')
return decoded_name;
result = strrchr (decoded_name, '.');
if (result != NULL)
result++; /* Skip the dot... */
else
result = decoded_name;
return result;
}
/* Return a string starting with '<', followed by STR, and '>'. */
static std::string
add_angle_brackets (const char *str)
{
return string_printf ("<%s>", str);
}
static const char *
ada_get_gdb_completer_word_break_characters (void)
{
return ada_completer_word_break_characters;
}
/* Print an array element index using the Ada syntax. */
static void
ada_print_array_index (struct value *index_value, struct ui_file *stream,
const struct value_print_options *options)
{
LA_VALUE_PRINT (index_value, stream, options);
fprintf_filtered (stream, " => ");
}
/* la_watch_location_expression for Ada. */
gdb::unique_xmalloc_ptr<char>
ada_watch_location_expression (struct type *type, CORE_ADDR addr)
{
type = check_typedef (TYPE_TARGET_TYPE (check_typedef (type)));
std::string name = type_to_string (type);
return gdb::unique_xmalloc_ptr<char>
(xstrprintf ("{%s} %s", name.c_str (), core_addr_to_string (addr)));
}
/* Assuming VECT points to an array of *SIZE objects of size
ELEMENT_SIZE, grow it to contain at least MIN_SIZE objects,
updating *SIZE as necessary and returning the (new) array. */
void *
grow_vect (void *vect, size_t *size, size_t min_size, int element_size)
{
if (*size < min_size)
{
*size *= 2;
if (*size < min_size)
*size = min_size;
vect = xrealloc (vect, *size * element_size);
}
return vect;
}
/* True (non-zero) iff TARGET matches FIELD_NAME up to any trailing
suffix of FIELD_NAME beginning "___". */
static int
field_name_match (const char *field_name, const char *target)
{
int len = strlen (target);
return
(strncmp (field_name, target, len) == 0
&& (field_name[len] == '\0'
|| (startswith (field_name + len, "___")
&& strcmp (field_name + strlen (field_name) - 6,
"___XVN") != 0)));
}
/* Assuming TYPE is a TYPE_CODE_STRUCT or a TYPE_CODE_TYPDEF to
a TYPE_CODE_STRUCT, find the field whose name matches FIELD_NAME,
and return its index. This function also handles fields whose name
have ___ suffixes because the compiler sometimes alters their name
by adding such a suffix to represent fields with certain constraints.
If the field could not be found, return a negative number if
MAYBE_MISSING is set. Otherwise raise an error. */
int
ada_get_field_index (const struct type *type, const char *field_name,
int maybe_missing)
{
int fieldno;
struct type *struct_type = check_typedef ((struct type *) type);
for (fieldno = 0; fieldno < TYPE_NFIELDS (struct_type); fieldno++)
if (field_name_match (TYPE_FIELD_NAME (struct_type, fieldno), field_name))
return fieldno;
if (!maybe_missing)
error (_("Unable to find field %s in struct %s. Aborting"),
field_name, TYPE_NAME (struct_type));
return -1;
}
/* The length of the prefix of NAME prior to any "___" suffix. */
int
ada_name_prefix_len (const char *name)
{
if (name == NULL)
return 0;
else
{
const char *p = strstr (name, "___");
if (p == NULL)
return strlen (name);
else
return p - name;
}
}
/* Return non-zero if SUFFIX is a suffix of STR.
Return zero if STR is null. */
static int
is_suffix (const char *str, const char *suffix)
{
int len1, len2;
if (str == NULL)
return 0;
len1 = strlen (str);
len2 = strlen (suffix);
return (len1 >= len2 && strcmp (str + len1 - len2, suffix) == 0);
}
/* The contents of value VAL, treated as a value of type TYPE. The
result is an lval in memory if VAL is. */
static struct value *
coerce_unspec_val_to_type (struct value *val, struct type *type)
{
type = ada_check_typedef (type);
if (value_type (val) == type)
return val;
else
{
struct value *result;
/* Make sure that the object size is not unreasonable before
trying to allocate some memory for it. */
ada_ensure_varsize_limit (type);
if (value_lazy (val)
|| TYPE_LENGTH (type) > TYPE_LENGTH (value_type (val)))
result = allocate_value_lazy (type);
else
{
result = allocate_value (type);
value_contents_copy_raw (result, 0, val, 0, 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));
return result;
}
}
static const gdb_byte *
cond_offset_host (const gdb_byte *valaddr, long offset)
{
if (valaddr == NULL)
return NULL;
else
return valaddr + offset;
}
static CORE_ADDR
cond_offset_target (CORE_ADDR address, long offset)
{
if (address == 0)
return 0;
else
return address + offset;
}
/* Issue a warning (as for the definition of warning in utils.c, but
with exactly one argument rather than ...), unless the limit on the
number of warnings has passed during the evaluation of the current
expression. */
/* FIXME: cagney/2004-10-10: This function is mimicking the behavior
provided by "complaint". */
static void lim_warning (const char *format, ...) ATTRIBUTE_PRINTF (1, 2);
static void
lim_warning (const char *format, ...)
{
va_list args;
va_start (args, format);
warnings_issued += 1;
if (warnings_issued <= warning_limit)
vwarning (format, args);
va_end (args);
}
/* Issue an error if the size of an object of type T is unreasonable,
i.e. if it would be a bad idea to allocate a value of this type in
GDB. */
void
ada_ensure_varsize_limit (const struct type *type)
{
if (TYPE_LENGTH (type) > varsize_limit)
error (_("object size is larger than varsize-limit"));
}
/* Maximum value of a SIZE-byte signed integer type. */
static LONGEST
max_of_size (int size)
{
LONGEST top_bit = (LONGEST) 1 << (size * 8 - 2);
return top_bit | (top_bit - 1);
}
/* Minimum value of a SIZE-byte signed integer type. */
static LONGEST
min_of_size (int size)
{
return -max_of_size (size) - 1;
}
/* Maximum value of a SIZE-byte unsigned integer type. */
static ULONGEST
umax_of_size (int size)
{
ULONGEST top_bit = (ULONGEST) 1 << (size * 8 - 1);
return top_bit | (top_bit - 1);
}
/* Maximum value of integral type T, as a signed quantity. */
static LONGEST
max_of_type (struct type *t)
{
if (TYPE_UNSIGNED (t))
return (LONGEST) umax_of_size (TYPE_LENGTH (t));
else
return max_of_size (TYPE_LENGTH (t));
}
/* Minimum value of integral type T, as a signed quantity. */
static LONGEST
min_of_type (struct type *t)
{
if (TYPE_UNSIGNED (t))
return 0;
else
return min_of_size (TYPE_LENGTH (t));
}
/* The largest value in the domain of TYPE, a discrete type, as an integer. */
LONGEST
ada_discrete_type_high_bound (struct type *type)
{
type = resolve_dynamic_type (type, NULL, 0);
switch (TYPE_CODE (type))
{
case TYPE_CODE_RANGE:
return TYPE_HIGH_BOUND (type);
case TYPE_CODE_ENUM:
return TYPE_FIELD_ENUMVAL (type, TYPE_NFIELDS (type) - 1);
case TYPE_CODE_BOOL:
return 1;
case TYPE_CODE_CHAR:
case TYPE_CODE_INT:
return max_of_type (type);
default:
error (_("Unexpected type in ada_discrete_type_high_bound."));
}
}
/* The smallest value in the domain of TYPE, a discrete type, as an integer. */
LONGEST
ada_discrete_type_low_bound (struct type *type)
{
type = resolve_dynamic_type (type, NULL, 0);
switch (TYPE_CODE (type))
{
case TYPE_CODE_RANGE:
return TYPE_LOW_BOUND (type);
case TYPE_CODE_ENUM:
return TYPE_FIELD_ENUMVAL (type, 0);
case TYPE_CODE_BOOL:
return 0;
case TYPE_CODE_CHAR:
case TYPE_CODE_INT:
return min_of_type (type);
default:
error (_("Unexpected type in ada_discrete_type_low_bound."));
}
}
/* The identity on non-range types. For range types, the underlying
non-range scalar type. */
static struct type *
get_base_type (struct type *type)
{
while (type != NULL && TYPE_CODE (type) == TYPE_CODE_RANGE)
{
if (type == TYPE_TARGET_TYPE (type) || TYPE_TARGET_TYPE (type) == NULL)
return type;
type = TYPE_TARGET_TYPE (type);
}
return type;
}
/* Return a decoded version of the given VALUE. This means returning
a value whose type is obtained by applying all the GNAT-specific
encondings, making the resulting type a static but standard description
of the initial type. */
struct value *
ada_get_decoded_value (struct value *value)
{
struct type *type = ada_check_typedef (value_type (value));
if (ada_is_array_descriptor_type (type)
|| (ada_is_constrained_packed_array_type (type)
&& TYPE_CODE (type) != TYPE_CODE_PTR))
{
if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF) /* array access type. */
value = ada_coerce_to_simple_array_ptr (value);
else
value = ada_coerce_to_simple_array (value);
}
else
value = ada_to_fixed_value (value);
return value;
}
/* Same as ada_get_decoded_value, but with the given TYPE.
Because there is no associated actual value for this type,
the resulting type might be a best-effort approximation in
the case of dynamic types. */
struct type *
ada_get_decoded_type (struct type *type)
{
type = to_static_fixed_type (type);
if (ada_is_constrained_packed_array_type (type))
type = ada_coerce_to_simple_array_type (type);
return type;
}
/* Language Selection */
/* If the main program is in Ada, return language_ada, otherwise return LANG
(the main program is in Ada iif the adainit symbol is found). */
enum language
ada_update_initial_language (enum language lang)
{
if (lookup_minimal_symbol ("adainit", (const char *) NULL,
(struct objfile *) NULL).minsym != NULL)
return language_ada;
return lang;
}
/* If the main procedure is written in Ada, then return its name.
The result is good until the next call. Return NULL if the main
procedure doesn't appear to be in Ada. */
char *
ada_main_name (void)
{
struct bound_minimal_symbol msym;
static gdb::unique_xmalloc_ptr<char> main_program_name;
/* For Ada, the name of the main procedure is stored in a specific
string constant, generated by the binder. Look for that symbol,
extract its address, and then read that string. If we didn't find
that string, then most probably the main procedure is not written
in Ada. */
msym = lookup_minimal_symbol (ADA_MAIN_PROGRAM_SYMBOL_NAME, NULL, NULL);
if (msym.minsym != NULL)
{
CORE_ADDR main_program_name_addr;
int err_code;
main_program_name_addr = BMSYMBOL_VALUE_ADDRESS (msym);
if (main_program_name_addr == 0)
error (_("Invalid address for Ada main program name."));
target_read_string (main_program_name_addr, &main_program_name,
1024, &err_code);
if (err_code != 0)
return NULL;
return main_program_name.get ();
}
/* The main procedure doesn't seem to be in Ada. */
return NULL;
}
/* Symbols */
/* Table of Ada operators and their GNAT-encoded names. Last entry is pair
of NULLs. */
const struct ada_opname_map ada_opname_table[] = {
{"Oadd", "\"+\"", BINOP_ADD},
{"Osubtract", "\"-\"", BINOP_SUB},
{"Omultiply", "\"*\"", BINOP_MUL},
{"Odivide", "\"/\"", BINOP_DIV},
{"Omod", "\"mod\"", BINOP_MOD},
{"Orem", "\"rem\"", BINOP_REM},
{"Oexpon", "\"**\"", BINOP_EXP},
{"Olt", "\"<\"", BINOP_LESS},
{"Ole", "\"<=\"", BINOP_LEQ},
{"Ogt", "\">\"", BINOP_GTR},
{"Oge", "\">=\"", BINOP_GEQ},
{"Oeq", "\"=\"", BINOP_EQUAL},
{"One", "\"/=\"", BINOP_NOTEQUAL},
{"Oand", "\"and\"", BINOP_BITWISE_AND},
{"Oor", "\"or\"", BINOP_BITWISE_IOR},
{"Oxor", "\"xor\"", BINOP_BITWISE_XOR},
{"Oconcat", "\"&\"", BINOP_CONCAT},
{"Oabs", "\"abs\"", UNOP_ABS},
{"Onot", "\"not\"", UNOP_LOGICAL_NOT},
{"Oadd", "\"+\"", UNOP_PLUS},
{"Osubtract", "\"-\"", UNOP_NEG},
{NULL, NULL}
};
/* The "encoded" form of DECODED, according to GNAT conventions. The
result is valid until the next call to ada_encode. If
THROW_ERRORS, throw an error if invalid operator name is found.
Otherwise, return NULL in that case. */
static char *
ada_encode_1 (const char *decoded, bool throw_errors)
{
static char *encoding_buffer = NULL;
static size_t encoding_buffer_size = 0;
const char *p;
int k;
if (decoded == NULL)
return NULL;
GROW_VECT (encoding_buffer, encoding_buffer_size,
2 * strlen (decoded) + 10);
k = 0;
for (p = decoded; *p != '\0'; p += 1)