7022349d5c
The fact that GDB defaults to assuming that functions return int, when
it has no debug info for the function has been a recurring source of
user confusion. Recently this came up on the errno pretty printer
discussions. Shortly after, it came up again on IRC, with someone
wondering why does getenv() in GDB return a negative int:
(gdb) p getenv("PATH")
$1 = -6185
This question (with s/getenv/random-other-C-runtime-function) is a FAQ
on IRC.
The reason for the above is:
(gdb) p getenv
$2 = {<text variable, no debug info>} 0x7ffff7751d80 <getenv>
(gdb) ptype getenv
type = int ()
... which means that GDB truncated the 64-bit pointer that is actually
returned from getent to 32-bit, and then sign-extended it:
(gdb) p /x -6185
$6 = 0xffffe7d7
The workaround is to cast the function to the right type, like:
(gdb) p ((char *(*) (const char *)) getenv) ("PATH")
$3 = 0x7fffffffe7d7 "/usr/local/bin:/"...
IMO, we should do better than this.
I see the "assume-int" issue the same way I see printing bogus values
for optimized-out variables instead of "<optimized out>" -- I'd much
rather that the debugger tells me "I don't know" and tells me how to
fix it than showing me bogus misleading results, making me go around
tilting at windmills.
If GDB prints a signed integer when you're expecting a pointer or
aggregate, you at least have some sense that something is off, but
consider the case of the function actually returning a 64-bit integer.
For example, compile this without debug info:
unsigned long long
function ()
{
return 0x7fffffffffffffff;
}
Currently, with pristine GDB, you get:
(gdb) p function ()
$1 = -1 # incorrect
(gdb) p /x function ()
$2 = 0xffffffff # incorrect
maybe after spending a few hours debugging you suspect something is
wrong with that -1, and do:
(gdb) ptype function
type = int ()
and maybe, just maybe, you realize that the function actually returns
unsigned long long. And you try to fix it with:
(gdb) p /x (unsigned long long) function ()
$3 = 0xffffffffffffffff # incorrect
... which still produces the wrong result, because GDB simply applied
int to unsigned long long conversion. Meaning, it sign-extended the
integer that it extracted from the return of the function, to 64-bits.
and then maybe, after asking around on IRC, you realize you have to
cast the function to a pointer of the right type, and call that. It
won't be easy, but after a few missteps, you'll get to it:
..... (gdb) p /x ((unsigned long long(*) ()) function) ()
$666 = 0x7fffffffffffffff # finally! :-)
So to improve on the user experience, this patch does the following
(interrelated) things:
- makes no-debug-info functions no longer default to "int" as return
type. Instead, they're left with NULL/"<unknown return type>"
return type.
(gdb) ptype getenv
type = <unknown return type> ()
- makes calling a function with unknown return type an error.
(gdb) p getenv ("PATH")
'getenv' has unknown return type; cast the call to its declared return type
- and then to make it easier to call the function, makes it possible
to _only_ cast the return of the function to the right type,
instead of having to cast the function to a function pointer:
(gdb) p (char *) getenv ("PATH") # now Just Works
$3 = 0x7fffffffe7d7 "/usr/local/bin:/"...
(gdb) p ((char *(*) (const char *)) getenv) ("PATH") # continues working
$4 = 0x7fffffffe7d7 "/usr/local/bin:/"...
I.e., it makes GDB default the function's return type to the type
of the cast, and the function's parameters to the type of the
arguments passed down.
After this patch, here's what you'll get for the "unsigned long long"
example above:
(gdb) p function ()
'function' has unknown return type; cast the call to its declared return type
(gdb) p /x (unsigned long long) function ()
$4 = 0x7fffffffffffffff # correct!
Note that while with "print" GDB shows the name of the function that
has the problem:
(gdb) p getenv ("PATH")
'getenv' has unknown return type; cast the call to its declared return type
which can by handy in more complicated expressions, "ptype" does not:
(gdb) ptype getenv ("PATH")
function has unknown return type; cast the call to its declared return type
This will be fixed in the next patch.
gdb/ChangeLog:
2017-09-04 Pedro Alves <palves@redhat.com>
* ada-lang.c (ada_evaluate_subexp) <TYPE_CODE_FUNC>: Don't handle
TYPE_GNU_IFUNC specially here. Throw error if return type is
unknown.
* ada-typeprint.c (print_func_type): Handle functions with unknown
return type.
* c-typeprint.c (c_type_print_base): Handle functions and methods
with unknown return type.
* compile/compile-c-symbols.c (convert_symbol_bmsym)
<mst_text_gnu_ifunc>: Use nodebug_text_gnu_ifunc_symbol.
* compile/compile-c-types.c: Include "objfiles.h".
(convert_func): For functions with unknown return type, warn and
default to int.
* compile/compile-object-run.c (compile_object_run): Adjust call
to call_function_by_hand_dummy.
* elfread.c (elf_gnu_ifunc_resolve_addr): Adjust call to
call_function_by_hand.
* eval.c (evaluate_subexp_standard): Adjust calls to
call_function_by_hand. Handle functions and methods with unknown
return type. Pass expect_type to call_function_by_hand.
* f-typeprint.c (f_type_print_base): Handle functions with unknown
return type.
* gcore.c (call_target_sbrk): Adjust call to
call_function_by_hand.
* gdbtypes.c (objfile_type): Leave nodebug text symbol with NULL
return type instead of int. Make nodebug_text_gnu_ifunc_symbol be
an integer address type instead of nodebug.
* guile/scm-value.c (gdbscm_value_call): Adjust call to
call_function_by_hand.
* infcall.c (error_call_unknown_return_type): New function.
(call_function_by_hand): New "default_return_type" parameter.
Pass it down.
(call_function_by_hand_dummy): New "default_return_type"
parameter. Use it instead of defaulting to int. If there's no
default and the return type is unknown, throw an error. If
there's a default return type, and the called function has no
debug info, then assume the function is prototyped.
* infcall.h (call_function_by_hand, call_function_by_hand_dummy):
New "default_return_type" parameter.
(error_call_unknown_return_type): New declaration.
* linux-fork.c (call_lseek): Cast return type of lseek.
(inferior_call_waitpid, checkpoint_command): Adjust calls to
call_function_by_hand.
* linux-tdep.c (linux_infcall_mmap, linux_infcall_munmap): Adjust
calls to call_function_by_hand.
* m2-typeprint.c (m2_procedure): Handle functions with unknown
return type.
* objc-lang.c (lookup_objc_class, lookup_child_selector)
(value_nsstring, print_object_command): Adjust calls to
call_function_by_hand.
* p-typeprint.c (pascal_type_print_varspec_prefix): Handle
functions with unknown return type.
(pascal_type_print_func_varspec_suffix): New function.
(pascal_type_print_varspec_suffix) <TYPE_CODE_FUNC,
TYPE_CODE_METHOD>: Use it.
* python/py-value.c (valpy_call): Adjust call to
call_function_by_hand.
* rust-lang.c (rust_evaluate_funcall): Adjust call to
call_function_by_hand.
* valarith.c (value_x_binop, value_x_unop): Adjust calls to
call_function_by_hand.
* valops.c (value_allocate_space_in_inferior): Adjust call to
call_function_by_hand.
* typeprint.c (type_print_unknown_return_type): New function.
* typeprint.h (type_print_unknown_return_type): New declaration.
gdb/testsuite/ChangeLog:
2017-09-04 Pedro Alves <palves@redhat.com>
* gdb.base/break-main-file-remove-fail.exp (test_remove_bp): Cast
return type of munmap in infcall.
* gdb.base/break-probes.exp: Cast return type of foo in infcall.
* gdb.base/checkpoint.exp: Simplify using for loop. Cast return
type of ftell in infcall.
* gdb.base/dprintf-detach.exp (dprintf_detach_test): Cast return
type of getpid in infcall.
* gdb.base/infcall-exec.exp: Cast return type of execlp in
infcall.
* gdb.base/info-os.exp: Cast return type of getpid in infcall.
Bail on failure to extract the pid.
* gdb.base/nodebug.c: #include <stdint.h>.
(multf, multf_noproto, mult, mult_noproto, add8, add8_noproto):
New functions.
* gdb.base/nodebug.exp (test_call_promotion): New procedure.
Change expected output of print/whatis/ptype with functions with
no debug info. Test all supported languages. Call
test_call_promotion.
* gdb.compile/compile.exp: Adjust expected output to expect
warning.
* gdb.threads/siginfo-threads.exp: Likewise.
767 lines
20 KiB
C
767 lines
20 KiB
C
/* Language independent support for printing types for GDB, the GNU debugger.
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Copyright (C) 1986-2017 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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#include "defs.h"
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#include "gdb_obstack.h"
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#include "bfd.h" /* Binary File Description */
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "value.h"
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#include "gdbcore.h"
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#include "command.h"
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#include "gdbcmd.h"
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#include "target.h"
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#include "language.h"
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#include "cp-abi.h"
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#include "typeprint.h"
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#include "valprint.h"
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#include <ctype.h>
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#include "cli/cli-utils.h"
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#include "extension.h"
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#include "completer.h"
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extern void _initialize_typeprint (void);
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static void ptype_command (char *, int);
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static void whatis_command (char *, int);
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static void whatis_exp (char *, int);
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const struct type_print_options type_print_raw_options =
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{
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1, /* raw */
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1, /* print_methods */
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1, /* print_typedefs */
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NULL, /* local_typedefs */
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NULL, /* global_table */
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NULL /* global_printers */
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};
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/* The default flags for 'ptype' and 'whatis'. */
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static struct type_print_options default_ptype_flags =
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{
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0, /* raw */
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1, /* print_methods */
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1, /* print_typedefs */
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NULL, /* local_typedefs */
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NULL, /* global_table */
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NULL /* global_printers */
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};
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/* A hash table holding typedef_field objects. This is more
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complicated than an ordinary hash because it must also track the
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lifetime of some -- but not all -- of the contained objects. */
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struct typedef_hash_table
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{
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/* The actual hash table. */
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htab_t table;
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/* Storage for typedef_field objects that must be synthesized. */
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struct obstack storage;
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};
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/* A hash function for a typedef_field. */
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static hashval_t
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hash_typedef_field (const void *p)
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{
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const struct typedef_field *tf = (const struct typedef_field *) p;
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struct type *t = check_typedef (tf->type);
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return htab_hash_string (TYPE_SAFE_NAME (t));
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}
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/* An equality function for a typedef field. */
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static int
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eq_typedef_field (const void *a, const void *b)
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{
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const struct typedef_field *tfa = (const struct typedef_field *) a;
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const struct typedef_field *tfb = (const struct typedef_field *) b;
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return types_equal (tfa->type, tfb->type);
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}
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/* Add typedefs from T to the hash table TABLE. */
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void
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recursively_update_typedef_hash (struct typedef_hash_table *table,
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struct type *t)
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{
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int i;
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if (table == NULL)
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return;
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for (i = 0; i < TYPE_TYPEDEF_FIELD_COUNT (t); ++i)
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{
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struct typedef_field *tdef = &TYPE_TYPEDEF_FIELD (t, i);
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void **slot;
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slot = htab_find_slot (table->table, tdef, INSERT);
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/* Only add a given typedef name once. Really this shouldn't
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happen; but it is safe enough to do the updates breadth-first
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and thus use the most specific typedef. */
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if (*slot == NULL)
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*slot = tdef;
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}
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/* Recurse into superclasses. */
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for (i = 0; i < TYPE_N_BASECLASSES (t); ++i)
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recursively_update_typedef_hash (table, TYPE_BASECLASS (t, i));
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}
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/* Add template parameters from T to the typedef hash TABLE. */
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void
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add_template_parameters (struct typedef_hash_table *table, struct type *t)
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{
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int i;
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if (table == NULL)
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return;
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for (i = 0; i < TYPE_N_TEMPLATE_ARGUMENTS (t); ++i)
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{
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struct typedef_field *tf;
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void **slot;
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/* We only want type-valued template parameters in the hash. */
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if (SYMBOL_CLASS (TYPE_TEMPLATE_ARGUMENT (t, i)) != LOC_TYPEDEF)
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continue;
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tf = XOBNEW (&table->storage, struct typedef_field);
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tf->name = SYMBOL_LINKAGE_NAME (TYPE_TEMPLATE_ARGUMENT (t, i));
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tf->type = SYMBOL_TYPE (TYPE_TEMPLATE_ARGUMENT (t, i));
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slot = htab_find_slot (table->table, tf, INSERT);
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if (*slot == NULL)
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*slot = tf;
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}
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}
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/* Create a new typedef-lookup hash table. */
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struct typedef_hash_table *
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create_typedef_hash (void)
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{
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struct typedef_hash_table *result;
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result = XNEW (struct typedef_hash_table);
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result->table = htab_create_alloc (10, hash_typedef_field, eq_typedef_field,
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NULL, xcalloc, xfree);
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obstack_init (&result->storage);
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return result;
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}
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/* Free a typedef field table. */
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void
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free_typedef_hash (struct typedef_hash_table *table)
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{
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if (table != NULL)
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{
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htab_delete (table->table);
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obstack_free (&table->storage, NULL);
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xfree (table);
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}
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}
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/* A cleanup for freeing a typedef_hash_table. */
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static void
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do_free_typedef_hash (void *arg)
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{
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free_typedef_hash ((struct typedef_hash_table *) arg);
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}
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/* Return a new cleanup that frees TABLE. */
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struct cleanup *
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make_cleanup_free_typedef_hash (struct typedef_hash_table *table)
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{
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return make_cleanup (do_free_typedef_hash, table);
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}
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/* Helper function for copy_typedef_hash. */
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static int
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copy_typedef_hash_element (void **slot, void *nt)
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{
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htab_t new_table = (htab_t) nt;
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void **new_slot;
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new_slot = htab_find_slot (new_table, *slot, INSERT);
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if (*new_slot == NULL)
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*new_slot = *slot;
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return 1;
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}
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/* Copy a typedef hash. */
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struct typedef_hash_table *
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copy_typedef_hash (struct typedef_hash_table *table)
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{
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struct typedef_hash_table *result;
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if (table == NULL)
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return NULL;
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result = create_typedef_hash ();
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htab_traverse_noresize (table->table, copy_typedef_hash_element,
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result->table);
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return result;
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}
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/* A cleanup to free the global typedef hash. */
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static void
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do_free_global_table (void *arg)
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{
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struct type_print_options *flags = (struct type_print_options *) arg;
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free_typedef_hash (flags->global_typedefs);
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free_ext_lang_type_printers (flags->global_printers);
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}
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/* Create the global typedef hash. */
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static struct cleanup *
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create_global_typedef_table (struct type_print_options *flags)
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{
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gdb_assert (flags->global_typedefs == NULL && flags->global_printers == NULL);
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flags->global_typedefs = create_typedef_hash ();
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flags->global_printers = start_ext_lang_type_printers ();
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return make_cleanup (do_free_global_table, flags);
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}
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/* Look up the type T in the global typedef hash. If it is found,
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return the typedef name. If it is not found, apply the
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type-printers, if any, given by start_script_type_printers and return the
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result. A NULL return means that the name was not found. */
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static const char *
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find_global_typedef (const struct type_print_options *flags,
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struct type *t)
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{
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char *applied;
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void **slot;
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struct typedef_field tf, *new_tf;
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if (flags->global_typedefs == NULL)
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return NULL;
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tf.name = NULL;
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tf.type = t;
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slot = htab_find_slot (flags->global_typedefs->table, &tf, INSERT);
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if (*slot != NULL)
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{
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new_tf = (struct typedef_field *) *slot;
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return new_tf->name;
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}
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/* Put an entry into the hash table now, in case
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apply_ext_lang_type_printers recurses. */
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new_tf = XOBNEW (&flags->global_typedefs->storage, struct typedef_field);
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new_tf->name = NULL;
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new_tf->type = t;
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*slot = new_tf;
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applied = apply_ext_lang_type_printers (flags->global_printers, t);
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if (applied != NULL)
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{
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new_tf->name
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= (const char *) obstack_copy0 (&flags->global_typedefs->storage,
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applied, strlen (applied));
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xfree (applied);
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}
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return new_tf->name;
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}
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/* Look up the type T in the typedef hash table in with FLAGS. If T
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is in the table, return its short (class-relative) typedef name.
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Otherwise return NULL. If the table is NULL, this always returns
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NULL. */
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const char *
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find_typedef_in_hash (const struct type_print_options *flags, struct type *t)
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{
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if (flags->local_typedefs != NULL)
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{
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struct typedef_field tf, *found;
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tf.name = NULL;
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tf.type = t;
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found = (struct typedef_field *) htab_find (flags->local_typedefs->table,
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&tf);
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if (found != NULL)
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return found->name;
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}
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return find_global_typedef (flags, t);
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}
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/* Print a description of a type in the format of a
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typedef for the current language.
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NEW is the new name for a type TYPE. */
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void
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typedef_print (struct type *type, struct symbol *newobj, struct ui_file *stream)
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{
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LA_PRINT_TYPEDEF (type, newobj, stream);
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}
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/* The default way to print a typedef. */
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void
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default_print_typedef (struct type *type, struct symbol *new_symbol,
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struct ui_file *stream)
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{
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error (_("Language not supported."));
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}
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/* Print a description of a type TYPE in the form of a declaration of a
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variable named VARSTRING. (VARSTRING is demangled if necessary.)
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Output goes to STREAM (via stdio).
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If SHOW is positive, we show the contents of the outermost level
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of structure even if there is a type name that could be used instead.
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If SHOW is negative, we never show the details of elements' types. */
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void
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type_print (struct type *type, const char *varstring, struct ui_file *stream,
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int show)
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{
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LA_PRINT_TYPE (type, varstring, stream, show, 0, &default_ptype_flags);
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}
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/* Print TYPE to a string, returning it. The caller is responsible for
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freeing the string. */
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std::string
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type_to_string (struct type *type)
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{
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TRY
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{
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string_file stb;
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type_print (type, "", &stb, -1);
|
||
return std::move (stb.string ());
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
}
|
||
END_CATCH
|
||
|
||
return {};
|
||
}
|
||
|
||
/* See typeprint.h. */
|
||
|
||
void
|
||
type_print_unknown_return_type (struct ui_file *stream)
|
||
{
|
||
fprintf_filtered (stream, _("<unknown return type>"));
|
||
}
|
||
|
||
/* Print type of EXP, or last thing in value history if EXP == NULL.
|
||
show is passed to type_print. */
|
||
|
||
static void
|
||
whatis_exp (char *exp, int show)
|
||
{
|
||
struct value *val;
|
||
struct cleanup *old_chain;
|
||
struct type *real_type = NULL;
|
||
struct type *type;
|
||
int full = 0;
|
||
LONGEST top = -1;
|
||
int using_enc = 0;
|
||
struct value_print_options opts;
|
||
struct type_print_options flags = default_ptype_flags;
|
||
|
||
old_chain = make_cleanup (null_cleanup, NULL);
|
||
|
||
if (exp)
|
||
{
|
||
if (*exp == '/')
|
||
{
|
||
int seen_one = 0;
|
||
|
||
for (++exp; *exp && !isspace (*exp); ++exp)
|
||
{
|
||
switch (*exp)
|
||
{
|
||
case 'r':
|
||
flags.raw = 1;
|
||
break;
|
||
case 'm':
|
||
flags.print_methods = 0;
|
||
break;
|
||
case 'M':
|
||
flags.print_methods = 1;
|
||
break;
|
||
case 't':
|
||
flags.print_typedefs = 0;
|
||
break;
|
||
case 'T':
|
||
flags.print_typedefs = 1;
|
||
break;
|
||
default:
|
||
error (_("unrecognized flag '%c'"), *exp);
|
||
}
|
||
seen_one = 1;
|
||
}
|
||
|
||
if (!*exp && !seen_one)
|
||
error (_("flag expected"));
|
||
if (!isspace (*exp))
|
||
error (_("expected space after format"));
|
||
exp = skip_spaces (exp);
|
||
}
|
||
|
||
expression_up expr = parse_expression (exp);
|
||
|
||
/* The behavior of "whatis" depends on whether the user
|
||
expression names a type directly, or a language expression
|
||
(including variable names). If the former, then "whatis"
|
||
strips one level of typedefs, only. If an expression,
|
||
"whatis" prints the type of the expression without stripping
|
||
any typedef level. "ptype" always strips all levels of
|
||
typedefs. */
|
||
if (show == -1 && expr->elts[0].opcode == OP_TYPE)
|
||
{
|
||
/* The user expression names a type directly. */
|
||
type = expr->elts[1].type;
|
||
|
||
/* If this is a typedef, then find its immediate target.
|
||
Use check_typedef to resolve stubs, but ignore its result
|
||
because we do not want to dig past all typedefs. */
|
||
check_typedef (type);
|
||
if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
|
||
type = TYPE_TARGET_TYPE (type);
|
||
}
|
||
else
|
||
{
|
||
/* The user expression names a type indirectly by naming an
|
||
object or expression of that type. Find that
|
||
indirectly-named type. */
|
||
val = evaluate_type (expr.get ());
|
||
type = value_type (val);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
val = access_value_history (0);
|
||
type = value_type (val);
|
||
}
|
||
|
||
get_user_print_options (&opts);
|
||
if (opts.objectprint)
|
||
{
|
||
if (((TYPE_CODE (type) == TYPE_CODE_PTR) || TYPE_IS_REFERENCE (type))
|
||
&& (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT))
|
||
real_type = value_rtti_indirect_type (val, &full, &top, &using_enc);
|
||
else if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
|
||
real_type = value_rtti_type (val, &full, &top, &using_enc);
|
||
}
|
||
|
||
printf_filtered ("type = ");
|
||
|
||
if (!flags.raw)
|
||
create_global_typedef_table (&flags);
|
||
|
||
if (real_type)
|
||
{
|
||
printf_filtered ("/* real type = ");
|
||
type_print (real_type, "", gdb_stdout, -1);
|
||
if (! full)
|
||
printf_filtered (" (incomplete object)");
|
||
printf_filtered (" */\n");
|
||
}
|
||
|
||
LA_PRINT_TYPE (type, "", gdb_stdout, show, 0, &flags);
|
||
printf_filtered ("\n");
|
||
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
static void
|
||
whatis_command (char *exp, int from_tty)
|
||
{
|
||
/* Most of the time users do not want to see all the fields
|
||
in a structure. If they do they can use the "ptype" command.
|
||
Hence the "-1" below. */
|
||
whatis_exp (exp, -1);
|
||
}
|
||
|
||
/* TYPENAME is either the name of a type, or an expression. */
|
||
|
||
static void
|
||
ptype_command (char *type_name, int from_tty)
|
||
{
|
||
whatis_exp (type_name, 1);
|
||
}
|
||
|
||
/* Print integral scalar data VAL, of type TYPE, onto stdio stream STREAM.
|
||
Used to print data from type structures in a specified type. For example,
|
||
array bounds may be characters or booleans in some languages, and this
|
||
allows the ranges to be printed in their "natural" form rather than as
|
||
decimal integer values.
|
||
|
||
FIXME: This is here simply because only the type printing routines
|
||
currently use it, and it wasn't clear if it really belonged somewhere
|
||
else (like printcmd.c). There are a lot of other gdb routines that do
|
||
something similar, but they are generally concerned with printing values
|
||
that come from the inferior in target byte order and target size. */
|
||
|
||
void
|
||
print_type_scalar (struct type *type, LONGEST val, struct ui_file *stream)
|
||
{
|
||
unsigned int i;
|
||
unsigned len;
|
||
|
||
type = check_typedef (type);
|
||
|
||
switch (TYPE_CODE (type))
|
||
{
|
||
|
||
case TYPE_CODE_ENUM:
|
||
len = TYPE_NFIELDS (type);
|
||
for (i = 0; i < len; i++)
|
||
{
|
||
if (TYPE_FIELD_ENUMVAL (type, i) == val)
|
||
{
|
||
break;
|
||
}
|
||
}
|
||
if (i < len)
|
||
{
|
||
fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
|
||
}
|
||
else
|
||
{
|
||
print_longest (stream, 'd', 0, val);
|
||
}
|
||
break;
|
||
|
||
case TYPE_CODE_INT:
|
||
print_longest (stream, TYPE_UNSIGNED (type) ? 'u' : 'd', 0, val);
|
||
break;
|
||
|
||
case TYPE_CODE_CHAR:
|
||
LA_PRINT_CHAR ((unsigned char) val, type, stream);
|
||
break;
|
||
|
||
case TYPE_CODE_BOOL:
|
||
fprintf_filtered (stream, val ? "TRUE" : "FALSE");
|
||
break;
|
||
|
||
case TYPE_CODE_RANGE:
|
||
print_type_scalar (TYPE_TARGET_TYPE (type), val, stream);
|
||
return;
|
||
|
||
case TYPE_CODE_UNDEF:
|
||
case TYPE_CODE_PTR:
|
||
case TYPE_CODE_ARRAY:
|
||
case TYPE_CODE_STRUCT:
|
||
case TYPE_CODE_UNION:
|
||
case TYPE_CODE_FUNC:
|
||
case TYPE_CODE_FLT:
|
||
case TYPE_CODE_VOID:
|
||
case TYPE_CODE_SET:
|
||
case TYPE_CODE_STRING:
|
||
case TYPE_CODE_ERROR:
|
||
case TYPE_CODE_MEMBERPTR:
|
||
case TYPE_CODE_METHODPTR:
|
||
case TYPE_CODE_METHOD:
|
||
case TYPE_CODE_REF:
|
||
case TYPE_CODE_RVALUE_REF:
|
||
case TYPE_CODE_NAMESPACE:
|
||
error (_("internal error: unhandled type in print_type_scalar"));
|
||
break;
|
||
|
||
default:
|
||
error (_("Invalid type code in symbol table."));
|
||
}
|
||
gdb_flush (stream);
|
||
}
|
||
|
||
/* Dump details of a type specified either directly or indirectly.
|
||
Uses the same sort of type lookup mechanism as ptype_command()
|
||
and whatis_command(). */
|
||
|
||
void
|
||
maintenance_print_type (char *type_name, int from_tty)
|
||
{
|
||
struct value *val;
|
||
struct type *type;
|
||
|
||
if (type_name != NULL)
|
||
{
|
||
expression_up expr = parse_expression (type_name);
|
||
if (expr->elts[0].opcode == OP_TYPE)
|
||
{
|
||
/* The user expression names a type directly, just use that type. */
|
||
type = expr->elts[1].type;
|
||
}
|
||
else
|
||
{
|
||
/* The user expression may name a type indirectly by naming an
|
||
object of that type. Find that indirectly named type. */
|
||
val = evaluate_type (expr.get ());
|
||
type = value_type (val);
|
||
}
|
||
if (type != NULL)
|
||
{
|
||
recursive_dump_type (type, 0);
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
struct cmd_list_element *setprinttypelist;
|
||
|
||
struct cmd_list_element *showprinttypelist;
|
||
|
||
static void
|
||
set_print_type (char *arg, int from_tty)
|
||
{
|
||
printf_unfiltered (
|
||
"\"set print type\" must be followed by the name of a subcommand.\n");
|
||
help_list (setprintlist, "set print type ", all_commands, gdb_stdout);
|
||
}
|
||
|
||
static void
|
||
show_print_type (char *args, int from_tty)
|
||
{
|
||
cmd_show_list (showprinttypelist, from_tty, "");
|
||
}
|
||
|
||
static int print_methods = 1;
|
||
|
||
static void
|
||
set_print_type_methods (char *args, int from_tty, struct cmd_list_element *c)
|
||
{
|
||
default_ptype_flags.print_methods = print_methods;
|
||
}
|
||
|
||
static void
|
||
show_print_type_methods (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("Printing of methods defined in a class in %s\n"),
|
||
value);
|
||
}
|
||
|
||
static int print_typedefs = 1;
|
||
|
||
static void
|
||
set_print_type_typedefs (char *args, int from_tty, struct cmd_list_element *c)
|
||
{
|
||
default_ptype_flags.print_typedefs = print_typedefs;
|
||
}
|
||
|
||
static void
|
||
show_print_type_typedefs (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("Printing of typedefs defined in a class in %s\n"),
|
||
value);
|
||
}
|
||
|
||
void
|
||
_initialize_typeprint (void)
|
||
{
|
||
struct cmd_list_element *c;
|
||
|
||
c = add_com ("ptype", class_vars, ptype_command, _("\
|
||
Print definition of type TYPE.\n\
|
||
Usage: ptype[/FLAGS] TYPE | EXPRESSION\n\
|
||
Argument may be any type (for example a type name defined by typedef,\n\
|
||
or \"struct STRUCT-TAG\" or \"class CLASS-NAME\" or \"union UNION-TAG\"\n\
|
||
or \"enum ENUM-TAG\") or an expression.\n\
|
||
The selected stack frame's lexical context is used to look up the name.\n\
|
||
Contrary to \"whatis\", \"ptype\" always unrolls any typedefs.\n\
|
||
\n\
|
||
Available FLAGS are:\n\
|
||
/r print in \"raw\" form; do not substitute typedefs\n\
|
||
/m do not print methods defined in a class\n\
|
||
/M print methods defined in a class\n\
|
||
/t do not print typedefs defined in a class\n\
|
||
/T print typedefs defined in a class"));
|
||
set_cmd_completer (c, expression_completer);
|
||
|
||
c = add_com ("whatis", class_vars, whatis_command,
|
||
_("Print data type of expression EXP.\n\
|
||
Only one level of typedefs is unrolled. See also \"ptype\"."));
|
||
set_cmd_completer (c, expression_completer);
|
||
|
||
add_prefix_cmd ("type", no_class, show_print_type,
|
||
_("Generic command for showing type-printing settings."),
|
||
&showprinttypelist, "show print type ", 0, &showprintlist);
|
||
add_prefix_cmd ("type", no_class, set_print_type,
|
||
_("Generic command for setting how types print."),
|
||
&setprinttypelist, "show print type ", 0, &setprintlist);
|
||
|
||
add_setshow_boolean_cmd ("methods", no_class, &print_methods,
|
||
_("\
|
||
Set printing of methods defined in classes."), _("\
|
||
Show printing of methods defined in classes."), NULL,
|
||
set_print_type_methods,
|
||
show_print_type_methods,
|
||
&setprinttypelist, &showprinttypelist);
|
||
add_setshow_boolean_cmd ("typedefs", no_class, &print_typedefs,
|
||
_("\
|
||
Set printing of typedefs defined in classes."), _("\
|
||
Show printing of typedefs defined in classes."), NULL,
|
||
set_print_type_typedefs,
|
||
show_print_type_typedefs,
|
||
&setprinttypelist, &showprinttypelist);
|
||
}
|
||
|
||
/* Print <not allocated> status to stream STREAM. */
|
||
|
||
void
|
||
val_print_not_allocated (struct ui_file *stream)
|
||
{
|
||
fprintf_filtered (stream, _("<not allocated>"));
|
||
}
|
||
|
||
/* Print <not associated> status to stream STREAM. */
|
||
|
||
void
|
||
val_print_not_associated (struct ui_file *stream)
|
||
{
|
||
fprintf_filtered (stream, _("<not associated>"));
|
||
}
|