9f757bf7fc
When using gdb for debugging Ada source code, there are several catchpoint
types you can define in order to stop upon certain conditions. Let's
use this small example:
procedure Foo is
begin
begin
raise Constraint_Error;
exception
when Program_Error =>
null;
when Constraint_Error =>
null;
when others =>
null;
end;
end Foo;
One can stop when the exception is being raised by using the exception
catchpoint like below:
(gdb) catch exception
Catchpoint 1: all Ada exceptions
(gdb)
In that case, when running Foo, gdb will stop at the line where the exception
was raised:
begin
>>> raise Constraint_Error;
exception
This patch introduces new type of catchpoint, when the user wants to stop
at the location of the exception handling.
Imagine we want to stop on any exception handled by the program, we can do:
(gdb) catch handlers
Catchpoint 1: all Ada exceptions handlers
(gdb) r
Starting program: /tmp/foo
By doing so, when running Foo, gdb will stop here:
Catchpoint 1, exception at 0x000000000040255a in foo () at foo.adb:25
25 when Constraint_Error =>
(gdb)
It is also possible to stop when the Constraint_Error exception is being
handled in this program. With this patch, we can use:
(gdb) catch handlers Constraint_Error
Catchpoint 1: `Constraint_Error' Ada exception handlers
(gdb)
Like for other catchpoint, you can set a condition when adding a catchpoint
on exception handlers.
Here the handlers catchpoint checks Global_Var:
(gdb) catch handlers Constraint_Error if Global_Var /= 0
gdb/ChangeLog:
* ada-lang.h (ada_exception_catchpoint_kind) <ada_catch_handlers>:
Add field.
* ada-lang.c (struct exception_support_info) <catch_handlers_sym>:
Add field.
(default_exception_support_info) <catch_handlers_sym>: Add field.
(exception_support_info_fallback) <catch_handlers_sym>: Add field.
(ada_exception_name_addr_1): Add "catch handlers" handling.
(ada_exception_catchpoint_cond_string) <ex>: New parameter.
Update all callers.
(create_excep_cond_exprs) <ex>: Add parameter.
(re_set_exception): Update create_excep_cond_exprs call.
(print_it_exception, print_one_exception, print_mention_exception)
(print_recreate_exception): Add "catch handler" handling.
(allocate_location_catch_handlers, re_set_catch_handlers)
(check_status_catch_handlers, print_it_catch_handlers)
(print_one_catch_handlers, print_mention_catch_handlers)
(print_recreate_catch_handlers): New function.
(catch_handlers_breakpoint_ops): New variable.
(catch_ada_exception_command_split) <is_catch_handlers_cmd>:
Add parameter. Add "catch handler" handling.
(ada_exception_sym_name, ada_exception_breakpoint_ops):
Add "catch handler" handling.
(ada_exception_catchpoint_cond_string): Add "catch handler"
handling.
(create_ada_exception_catchpoint): Update create_excep_cond_exprs
call.
(catch_ada_handlers_command): New function.
(initialize_ada_catchpoint_ops): Initialize "catch handlers"
operations structure.
(_initialize_ada_language): Add "catch handlers" command entry.
* NEWS: Document "catch handlers" feature.
gdb/doc/ChangeLog:
* gdb.texinfo (Set Catchpoints): Add documentation for new
"catch handlers" action.
gdb/testsuite/ChangeLog:
* gdb.ada/excep_handle.exp: New testcase.
* gdb.ada/excep_handle/foo.adb: New file.
* gdb.ada/excep_handle/pck.ads: New file.
Tested on x86_64-linux.
422 lines
13 KiB
C++
422 lines
13 KiB
C++
/* Ada language support definitions for GDB, the GNU debugger.
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Copyright (C) 1992-2018 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#if !defined (ADA_LANG_H)
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#define ADA_LANG_H 1
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struct frame_info;
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struct inferior;
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struct type_print_options;
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struct parser_state;
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#include "value.h"
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#include "gdbtypes.h"
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#include "breakpoint.h"
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#include "vec.h"
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/* Names of specific files known to be part of the runtime
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system and that might consider (confusing) debugging information.
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Each name (a basic regular expression string) is followed by a
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comma. FIXME: Should be part of a configuration file. */
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#if defined (__linux__)
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#define ADA_KNOWN_RUNTIME_FILE_NAME_PATTERNS \
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"^[agis]-.*\\.ad[bs]$", \
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"/lib.*/libpthread\\.so[.0-9]*$", "/lib.*/libpthread\\.a$", \
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"/lib.*/libc\\.so[.0-9]*$", "/lib.*/libc\\.a$",
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#endif
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#if !defined (ADA_KNOWN_RUNTIME_FILE_NAME_PATTERNS)
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#define ADA_KNOWN_RUNTIME_FILE_NAME_PATTERNS \
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"^unwind-seh.c$", \
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"^[agis]-.*\\.ad[bs]$",
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#endif
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/* Names of compiler-generated auxiliary functions probably of no
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interest to users. Each name (a basic regular expression string)
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is followed by a comma. */
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#define ADA_KNOWN_AUXILIARY_FUNCTION_NAME_PATTERNS \
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"___clean[.$a-zA-Z0-9_]*$", \
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"___finalizer[.$a-zA-Z0-9_]*$",
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/* The maximum number of frame levels searched for non-local,
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* non-global symbols. This limit exists as a precaution to prevent
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* infinite search loops when the stack is screwed up. */
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#define MAX_ENCLOSING_FRAME_LEVELS 7
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/* Maximum number of steps followed in looking for the ultimate
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referent of a renaming. This prevents certain infinite loops that
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can otherwise result. */
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#define MAX_RENAMING_CHAIN_LENGTH 10
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struct block;
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/* Corresponding encoded/decoded names and opcodes for Ada user-definable
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operators. */
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struct ada_opname_map
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{
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const char *encoded;
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const char *decoded;
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enum exp_opcode op;
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};
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/* Table of Ada operators in encoded and decoded forms. */
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/* Defined in ada-lang.c */
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extern const struct ada_opname_map ada_opname_table[];
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/* Denotes a type of renaming symbol (see ada_parse_renaming). */
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enum ada_renaming_category
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{
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/* Indicates a symbol that does not encode a renaming. */
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ADA_NOT_RENAMING,
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/* For symbols declared
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Foo : TYPE renamed OBJECT; */
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ADA_OBJECT_RENAMING,
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/* For symbols declared
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Foo : exception renames EXCEPTION; */
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ADA_EXCEPTION_RENAMING,
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/* For packages declared
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package Foo renames PACKAGE; */
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ADA_PACKAGE_RENAMING,
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/* For subprograms declared
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SUBPROGRAM_SPEC renames SUBPROGRAM;
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(Currently not used). */
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ADA_SUBPROGRAM_RENAMING
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};
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/* The different types of catchpoints that we introduced for catching
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Ada exceptions. */
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enum ada_exception_catchpoint_kind
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{
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ada_catch_exception,
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ada_catch_exception_unhandled,
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ada_catch_assert,
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ada_catch_handlers
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};
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/* Ada task structures. */
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struct ada_task_info
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{
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/* The PTID of the thread that this task runs on. This ptid is computed
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in a target-dependent way from the associated Task Control Block. */
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ptid_t ptid;
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/* The ID of the task. */
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CORE_ADDR task_id;
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/* The name of the task. */
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char name[257];
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/* The current state of the task. */
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int state;
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/* The priority associated to the task. */
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int priority;
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/* If non-zero, the task ID of the parent task. */
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CORE_ADDR parent;
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/* If the task is waiting on a task entry, this field contains
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the ID of the other task. Zero otherwise. */
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CORE_ADDR called_task;
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/* If the task is accepting a rendezvous with another task, this field
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contains the ID of the calling task. Zero otherwise. */
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CORE_ADDR caller_task;
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/* The CPU on which the task is running. This is dependent on
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the runtime actually providing that info, which is not always
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the case. Normally, we should be able to count on it on
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bare-metal targets. */
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int base_cpu;
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};
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/* Assuming V points to an array of S objects, make sure that it contains at
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least M objects, updating V and S as necessary. */
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#define GROW_VECT(v, s, m) \
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if ((s) < (m)) (v) = (char *) grow_vect (v, &(s), m, sizeof *(v));
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extern void *grow_vect (void *, size_t *, size_t, int);
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extern void ada_ensure_varsize_limit (const struct type *type);
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extern int ada_get_field_index (const struct type *type,
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const char *field_name,
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int maybe_missing);
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extern int ada_parse (struct parser_state *); /* Defined in ada-exp.y */
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extern void ada_yyerror (const char *); /* Defined in ada-exp.y */
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/* Defined in ada-typeprint.c */
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extern void ada_print_type (struct type *, const char *, struct ui_file *, int,
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int, const struct type_print_options *);
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extern void ada_print_typedef (struct type *type, struct symbol *new_symbol,
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struct ui_file *stream);
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extern void ada_val_print (struct type *, int, CORE_ADDR,
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struct ui_file *, int,
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struct value *,
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const struct value_print_options *);
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extern void ada_value_print (struct value *, struct ui_file *,
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const struct value_print_options *);
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/* Defined in ada-lang.c */
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extern void ada_emit_char (int, struct type *, struct ui_file *, int, int);
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extern void ada_printchar (int, struct type *, struct ui_file *);
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extern void ada_printstr (struct ui_file *, struct type *, const gdb_byte *,
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unsigned int, const char *, int,
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const struct value_print_options *);
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struct value *ada_convert_actual (struct value *actual,
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struct type *formal_type0);
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extern struct value *ada_value_subscript (struct value *, int,
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struct value **);
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extern void ada_fixup_array_indexes_type (struct type *index_desc_type);
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extern struct type *ada_array_element_type (struct type *, int);
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extern int ada_array_arity (struct type *);
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struct type *ada_type_of_array (struct value *, int);
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extern struct value *ada_coerce_to_simple_array_ptr (struct value *);
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struct value *ada_coerce_to_simple_array (struct value *);
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extern int ada_is_simple_array_type (struct type *);
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extern int ada_is_array_descriptor_type (struct type *);
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extern int ada_is_bogus_array_descriptor (struct type *);
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extern LONGEST ada_discrete_type_low_bound (struct type *);
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extern LONGEST ada_discrete_type_high_bound (struct type *);
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extern struct value *ada_get_decoded_value (struct value *value);
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extern struct type *ada_get_decoded_type (struct type *type);
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extern const char *ada_decode_symbol (const struct general_symbol_info *);
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extern const char *ada_decode (const char*);
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extern enum language ada_update_initial_language (enum language);
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extern int ada_lookup_symbol_list (const char *, const struct block *,
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domain_enum, struct block_symbol**);
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extern char *ada_fold_name (const char *);
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extern struct block_symbol ada_lookup_symbol (const char *,
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const struct block *,
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domain_enum, int *);
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extern void ada_lookup_encoded_symbol
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(const char *name, const struct block *block, domain_enum domain,
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struct block_symbol *symbol_info);
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extern struct bound_minimal_symbol ada_lookup_simple_minsym (const char *);
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extern void ada_fill_in_ada_prototype (struct symbol *);
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extern int user_select_syms (struct block_symbol *, int, int);
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extern int get_selections (int *, int, int, int, const char *);
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extern int ada_scan_number (const char *, int, LONGEST *, int *);
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extern struct type *ada_parent_type (struct type *);
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extern int ada_is_ignored_field (struct type *, int);
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extern int ada_is_constrained_packed_array_type (struct type *);
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extern struct value *ada_value_primitive_packed_val (struct value *,
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const gdb_byte *,
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long, int, int,
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struct type *);
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extern struct type *ada_coerce_to_simple_array_type (struct type *);
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extern int ada_is_character_type (struct type *);
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extern int ada_is_string_type (struct type *);
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extern int ada_is_tagged_type (struct type *, int);
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extern int ada_is_tag_type (struct type *);
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extern struct type *ada_tag_type (struct value *);
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extern struct value *ada_value_tag (struct value *);
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extern const char *ada_tag_name (struct value *);
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extern struct value *ada_tag_value_at_base_address (struct value *obj);
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extern int ada_is_parent_field (struct type *, int);
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extern int ada_is_wrapper_field (struct type *, int);
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extern int ada_is_variant_part (struct type *, int);
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extern struct type *ada_variant_discrim_type (struct type *, struct type *);
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extern int ada_is_others_clause (struct type *, int);
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extern int ada_in_variant (LONGEST, struct type *, int);
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extern const char *ada_variant_discrim_name (struct type *);
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extern struct value *ada_value_struct_elt (struct value *, const char *, int);
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extern int ada_is_aligner_type (struct type *);
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extern struct type *ada_aligned_type (struct type *);
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extern const gdb_byte *ada_aligned_value_addr (struct type *,
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const gdb_byte *);
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extern const char *ada_attribute_name (enum exp_opcode);
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extern int ada_is_fixed_point_type (struct type *);
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extern int ada_is_system_address_type (struct type *);
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extern struct value *ada_delta (struct type *);
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extern struct value *ada_scaling_factor (struct type *);
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extern struct type *ada_system_address_type (void);
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extern int ada_which_variant_applies (struct type *, struct type *,
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const gdb_byte *);
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extern struct type *ada_to_fixed_type (struct type *, const gdb_byte *,
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CORE_ADDR, struct value *,
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int check_tag);
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extern struct value *ada_to_fixed_value (struct value *val);
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extern struct type *ada_template_to_fixed_record_type_1 (struct type *type,
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const gdb_byte *valaddr,
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CORE_ADDR address,
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struct value *dval0,
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int keep_dynamic_fields);
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extern int ada_name_prefix_len (const char *);
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extern const char *ada_type_name (struct type *);
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extern struct type *ada_find_parallel_type (struct type *,
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const char *suffix);
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extern bool get_int_var_value (const char *, LONGEST &value);
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extern struct symbol *ada_find_renaming_symbol (struct symbol *name_sym,
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const struct block *block);
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extern int ada_prefer_type (struct type *, struct type *);
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extern struct type *ada_get_base_type (struct type *);
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extern struct type *ada_check_typedef (struct type *);
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extern char *ada_encode (const char *);
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extern const char *ada_enum_name (const char *);
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extern int ada_is_modular_type (struct type *);
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extern ULONGEST ada_modulus (struct type *);
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extern struct value *ada_value_ind (struct value *);
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extern void ada_print_scalar (struct type *, LONGEST, struct ui_file *);
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extern int ada_is_range_type_name (const char *);
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extern enum ada_renaming_category ada_parse_renaming (struct symbol *,
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const char **,
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int *, const char **);
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extern void ada_find_printable_frame (struct frame_info *fi);
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extern char *ada_breakpoint_rewrite (char *, int *);
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extern char *ada_main_name (void);
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extern std::string ada_name_for_lookup (const char *name);
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extern void create_ada_exception_catchpoint
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(struct gdbarch *gdbarch, enum ada_exception_catchpoint_kind ex_kind,
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char *excep_string, char *cond_string, int tempflag, int disabled,
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int from_tty);
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/* Some information about a given Ada exception. */
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struct ada_exc_info
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{
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/* The name of the exception. */
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const char *name;
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/* The address of the symbol corresponding to that exception. */
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CORE_ADDR addr;
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bool operator< (const ada_exc_info &) const;
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bool operator== (const ada_exc_info &) const;
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};
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extern std::vector<ada_exc_info> ada_exceptions_list (const char *regexp);
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/* Tasking-related: ada-tasks.c */
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extern int valid_task_id (int);
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extern struct ada_task_info *ada_get_task_info_from_ptid (ptid_t ptid);
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extern int ada_get_task_number (ptid_t);
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typedef void (ada_task_list_iterator_ftype) (struct ada_task_info *task);
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extern void iterate_over_live_ada_tasks
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(ada_task_list_iterator_ftype *iterator);
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extern const char *ada_get_tcb_types_info (void);
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extern int ada_build_task_list (void);
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extern void print_ada_task_info (struct ui_out *uiout,
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char *taskno_str,
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struct inferior *inf);
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#endif
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