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6b8505468e
GDB computes structure byte offsets using a 32 bit integer. And, first it computes the offset in bits and then converts to bytes. The result is that any offset that if 512K bytes or larger overflows. This patch changes GDB to use LONGEST for such calculations. PR gdb/17520 Structure offset wrong when 1/4 GB or greater. * c-lang.h: Change all parameters, variables, and struct or union members used as struct or union fie3ld offsets from int to LONGEST. * c-valprint.c: Likewise. * cp-abi.c: Likewise. * cp-abi.h: Likewise. * cp-valprint.c: Likewise. * d-valprint.c: Likewise. * dwarf2loc.c: Likewise. * eval.c: Likewise. * extension-priv.h: Likewise. * extension.c: Likewise. * extension.h: Likewise. * findvar.c: Likewise. * gdbtypes.h: Likewise. * gnu-v2-abi.c: Likewise. * gnu-v3-abi.c: Likewise. * go-valprint.c: Likewise. * guile/guile-internal.h: Likewise. * guile/scm-pretty-print.c: Likewise. * jv-valprint.c Likewise. * opencl-lang.c: Likewise. * p-lang.h: Likewise. * python/py-prettyprint.c: Likewise. * python/python-internal.h: Likewise. * spu-tdep.c: Likewise. * typeprint.c: Likewise. * valarith.c: Likewise. * valops.c: Likewise. * valprint.c: Likewise. * valprint.h: Likewise. * value.c: Likewise. * value.h: Likewise. * p-valprint.c: Likewise. * c-typeprint.c (c_type_print_base): When printing offset, use plongest, not %d. * gdbtypes.c (recursive_dump_type): Ditto.
415 lines
10 KiB
C
415 lines
10 KiB
C
/* Generic code for supporting multiple C++ ABI's
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Copyright (C) 2001-2016 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 "value.h"
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#include "cp-abi.h"
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#include "command.h"
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#include "gdbcmd.h"
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#include "ui-out.h"
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static struct cp_abi_ops *find_cp_abi (const char *short_name);
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static struct cp_abi_ops current_cp_abi = { "", NULL };
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static struct cp_abi_ops auto_cp_abi = { "auto", NULL };
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#define CP_ABI_MAX 8
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static struct cp_abi_ops *cp_abis[CP_ABI_MAX];
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static int num_cp_abis = 0;
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enum ctor_kinds
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is_constructor_name (const char *name)
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{
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if ((current_cp_abi.is_constructor_name) == NULL)
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error (_("ABI doesn't define required function is_constructor_name"));
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return (*current_cp_abi.is_constructor_name) (name);
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}
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enum dtor_kinds
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is_destructor_name (const char *name)
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{
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if ((current_cp_abi.is_destructor_name) == NULL)
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error (_("ABI doesn't define required function is_destructor_name"));
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return (*current_cp_abi.is_destructor_name) (name);
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}
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int
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is_vtable_name (const char *name)
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{
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if ((current_cp_abi.is_vtable_name) == NULL)
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error (_("ABI doesn't define required function is_vtable_name"));
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return (*current_cp_abi.is_vtable_name) (name);
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}
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int
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is_operator_name (const char *name)
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{
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if ((current_cp_abi.is_operator_name) == NULL)
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error (_("ABI doesn't define required function is_operator_name"));
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return (*current_cp_abi.is_operator_name) (name);
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}
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int
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baseclass_offset (struct type *type, int index, const gdb_byte *valaddr,
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LONGEST embedded_offset, CORE_ADDR address,
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const struct value *val)
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{
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int res = 0;
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gdb_assert (current_cp_abi.baseclass_offset != NULL);
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TRY
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{
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res = (*current_cp_abi.baseclass_offset) (type, index, valaddr,
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embedded_offset,
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address, val);
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}
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CATCH (ex, RETURN_MASK_ERROR)
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{
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if (ex.error != NOT_AVAILABLE_ERROR)
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throw_exception (ex);
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throw_error (NOT_AVAILABLE_ERROR,
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_("Cannot determine virtual baseclass offset "
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"of incomplete object"));
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}
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END_CATCH
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return res;
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}
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struct value *
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value_virtual_fn_field (struct value **arg1p,
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struct fn_field *f, int j,
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struct type *type, int offset)
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{
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if ((current_cp_abi.virtual_fn_field) == NULL)
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return NULL;
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return (*current_cp_abi.virtual_fn_field) (arg1p, f, j,
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type, offset);
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}
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struct type *
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value_rtti_type (struct value *v, int *full,
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LONGEST *top, int *using_enc)
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{
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struct type *ret = NULL;
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if ((current_cp_abi.rtti_type) == NULL)
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return NULL;
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TRY
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{
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ret = (*current_cp_abi.rtti_type) (v, full, top, using_enc);
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}
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CATCH (e, RETURN_MASK_ERROR)
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{
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return NULL;
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}
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END_CATCH
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return ret;
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}
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void
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cplus_print_method_ptr (const gdb_byte *contents,
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struct type *type,
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struct ui_file *stream)
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{
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if (current_cp_abi.print_method_ptr == NULL)
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error (_("GDB does not support pointers to methods on this target"));
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(*current_cp_abi.print_method_ptr) (contents, type, stream);
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}
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int
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cplus_method_ptr_size (struct type *to_type)
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{
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if (current_cp_abi.method_ptr_size == NULL)
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error (_("GDB does not support pointers to methods on this target"));
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return (*current_cp_abi.method_ptr_size) (to_type);
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}
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void
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cplus_make_method_ptr (struct type *type, gdb_byte *contents,
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CORE_ADDR value, int is_virtual)
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{
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if (current_cp_abi.make_method_ptr == NULL)
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error (_("GDB does not support pointers to methods on this target"));
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(*current_cp_abi.make_method_ptr) (type, contents, value, is_virtual);
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}
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CORE_ADDR
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cplus_skip_trampoline (struct frame_info *frame,
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CORE_ADDR stop_pc)
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{
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if (current_cp_abi.skip_trampoline == NULL)
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return 0;
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return (*current_cp_abi.skip_trampoline) (frame, stop_pc);
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}
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struct value *
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cplus_method_ptr_to_value (struct value **this_p,
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struct value *method_ptr)
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{
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if (current_cp_abi.method_ptr_to_value == NULL)
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error (_("GDB does not support pointers to methods on this target"));
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return (*current_cp_abi.method_ptr_to_value) (this_p, method_ptr);
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}
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/* See cp-abi.h. */
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void
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cplus_print_vtable (struct value *value)
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{
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if (current_cp_abi.print_vtable == NULL)
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error (_("GDB cannot print the vtable on this target"));
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(*current_cp_abi.print_vtable) (value);
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}
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/* See cp-abi.h. */
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struct value *
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cplus_typeid (struct value *value)
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{
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if (current_cp_abi.get_typeid == NULL)
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error (_("GDB cannot find the typeid on this target"));
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return (*current_cp_abi.get_typeid) (value);
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}
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/* See cp-abi.h. */
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struct type *
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cplus_typeid_type (struct gdbarch *gdbarch)
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{
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if (current_cp_abi.get_typeid_type == NULL)
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error (_("GDB cannot find the type for 'typeid' on this target"));
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return (*current_cp_abi.get_typeid_type) (gdbarch);
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}
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/* See cp-abi.h. */
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struct type *
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cplus_type_from_type_info (struct value *value)
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{
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if (current_cp_abi.get_type_from_type_info == NULL)
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error (_("GDB cannot find the type from a std::type_info on this target"));
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return (*current_cp_abi.get_type_from_type_info) (value);
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}
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/* See cp-abi.h. */
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char *
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cplus_typename_from_type_info (struct value *value)
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{
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if (current_cp_abi.get_typename_from_type_info == NULL)
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error (_("GDB cannot find the type name "
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"from a std::type_info on this target"));
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return (*current_cp_abi.get_typename_from_type_info) (value);
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}
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int
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cp_pass_by_reference (struct type *type)
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{
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if ((current_cp_abi.pass_by_reference) == NULL)
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return 0;
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return (*current_cp_abi.pass_by_reference) (type);
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}
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/* Set the current C++ ABI to SHORT_NAME. */
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static int
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switch_to_cp_abi (const char *short_name)
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{
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struct cp_abi_ops *abi;
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abi = find_cp_abi (short_name);
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if (abi == NULL)
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return 0;
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current_cp_abi = *abi;
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return 1;
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}
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/* Add ABI to the list of supported C++ ABI's. */
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int
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register_cp_abi (struct cp_abi_ops *abi)
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{
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if (num_cp_abis == CP_ABI_MAX)
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internal_error (__FILE__, __LINE__,
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_("Too many C++ ABIs, please increase "
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"CP_ABI_MAX in cp-abi.c"));
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cp_abis[num_cp_abis++] = abi;
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return 1;
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}
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/* Set the ABI to use in "auto" mode to SHORT_NAME. */
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void
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set_cp_abi_as_auto_default (const char *short_name)
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{
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char *new_longname, *new_doc;
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struct cp_abi_ops *abi = find_cp_abi (short_name);
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if (abi == NULL)
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internal_error (__FILE__, __LINE__,
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_("Cannot find C++ ABI \"%s\" to set it as auto default."),
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short_name);
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if (auto_cp_abi.longname != NULL)
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xfree ((char *) auto_cp_abi.longname);
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if (auto_cp_abi.doc != NULL)
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xfree ((char *) auto_cp_abi.doc);
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auto_cp_abi = *abi;
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auto_cp_abi.shortname = "auto";
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new_longname = xstrprintf ("currently \"%s\"", abi->shortname);
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auto_cp_abi.longname = new_longname;
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new_doc = xstrprintf ("Automatically selected; currently \"%s\"",
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abi->shortname);
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auto_cp_abi.doc = new_doc;
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/* Since we copy the current ABI into current_cp_abi instead of
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using a pointer, if auto is currently the default, we need to
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reset it. */
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if (strcmp (current_cp_abi.shortname, "auto") == 0)
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switch_to_cp_abi ("auto");
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}
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/* Return the ABI operations associated with SHORT_NAME. */
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static struct cp_abi_ops *
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find_cp_abi (const char *short_name)
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{
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int i;
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for (i = 0; i < num_cp_abis; i++)
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if (strcmp (cp_abis[i]->shortname, short_name) == 0)
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return cp_abis[i];
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return NULL;
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}
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/* Display the list of registered C++ ABIs. */
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static void
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list_cp_abis (int from_tty)
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{
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struct ui_out *uiout = current_uiout;
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struct cleanup *cleanup_chain;
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int i;
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ui_out_text (uiout, "The available C++ ABIs are:\n");
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cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout,
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"cp-abi-list");
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for (i = 0; i < num_cp_abis; i++)
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{
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char pad[14];
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int padcount;
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ui_out_text (uiout, " ");
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ui_out_field_string (uiout, "cp-abi", cp_abis[i]->shortname);
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padcount = 16 - 2 - strlen (cp_abis[i]->shortname);
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pad[padcount] = 0;
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while (padcount > 0)
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pad[--padcount] = ' ';
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ui_out_text (uiout, pad);
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ui_out_field_string (uiout, "doc", cp_abis[i]->doc);
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ui_out_text (uiout, "\n");
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}
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do_cleanups (cleanup_chain);
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}
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/* Set the current C++ ABI, or display the list of options if no
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argument is given. */
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static void
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set_cp_abi_cmd (char *args, int from_tty)
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{
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if (args == NULL)
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{
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list_cp_abis (from_tty);
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return;
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}
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if (!switch_to_cp_abi (args))
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error (_("Could not find \"%s\" in ABI list"), args);
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}
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/* A completion function for "set cp-abi". */
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static VEC (char_ptr) *
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cp_abi_completer (struct cmd_list_element *ignore,
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const char *text, const char *word)
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{
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static const char **cp_abi_names;
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if (cp_abi_names == NULL)
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{
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int i;
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cp_abi_names = XNEWVEC (const char *, num_cp_abis + 1);
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for (i = 0; i < num_cp_abis; ++i)
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cp_abi_names[i] = cp_abis[i]->shortname;
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cp_abi_names[i] = NULL;
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}
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return complete_on_enum (cp_abi_names, text, word);
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}
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/* Show the currently selected C++ ABI. */
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static void
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show_cp_abi_cmd (char *args, int from_tty)
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{
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struct ui_out *uiout = current_uiout;
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ui_out_text (uiout, "The currently selected C++ ABI is \"");
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ui_out_field_string (uiout, "cp-abi", current_cp_abi.shortname);
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ui_out_text (uiout, "\" (");
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ui_out_field_string (uiout, "longname", current_cp_abi.longname);
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ui_out_text (uiout, ").\n");
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}
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extern initialize_file_ftype _initialize_cp_abi; /* -Wmissing-prototypes */
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void
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_initialize_cp_abi (void)
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{
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struct cmd_list_element *c;
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register_cp_abi (&auto_cp_abi);
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switch_to_cp_abi ("auto");
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c = add_cmd ("cp-abi", class_obscure, set_cp_abi_cmd, _("\
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Set the ABI used for inspecting C++ objects.\n\
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\"set cp-abi\" with no arguments will list the available ABIs."),
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&setlist);
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set_cmd_completer (c, cp_abi_completer);
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add_cmd ("cp-abi", class_obscure, show_cp_abi_cmd,
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_("Show the ABI used for inspecting C++ objects."),
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&showlist);
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}
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