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https://sourceware.org/git/binutils-gdb.git
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492d29ea1c
This patch splits the TRY_CATCH macro into three, so that we go from
this:
~~~
volatile gdb_exception ex;
TRY_CATCH (ex, RETURN_MASK_ERROR)
{
}
if (ex.reason < 0)
{
}
~~~
to this:
~~~
TRY
{
}
CATCH (ex, RETURN_MASK_ERROR)
{
}
END_CATCH
~~~
Thus, we'll be getting rid of the local volatile exception object, and
declaring the caught exception in the catch block.
This allows reimplementing TRY/CATCH in terms of C++ exceptions when
building in C++ mode, while still allowing to build GDB in C mode
(using setjmp/longjmp), as a transition step.
TBC, after this patch, is it _not_ valid to have code between the TRY
and the CATCH blocks, like:
TRY
{
}
// some code here.
CATCH (ex, RETURN_MASK_ERROR)
{
}
END_CATCH
Just like it isn't valid to do that with C++'s native try/catch.
By switching to creating the exception object inside the CATCH block
scope, we can get rid of all the explicitly allocated volatile
exception objects all over the tree, and map the CATCH block more
directly to C++'s catch blocks.
The majority of the TRY_CATCH -> TRY+CATCH+END_CATCH conversion was
done with a script, rerun from scratch at every rebase, no manual
editing involved. After the mechanical conversion, a few places
needed manual intervention, to fix preexisting cases where we were
using the exception object outside of the TRY_CATCH block, and cases
where we were using "else" after a 'if (ex.reason) < 0)' [a CATCH
after this patch]. The result was folded into this patch so that GDB
still builds at each incremental step.
END_CATCH is necessary for two reasons:
First, because we name the exception object in the CATCH block, which
requires creating a scope, which in turn must be closed somewhere.
Declaring the exception variable in the initializer field of a for
block, like:
#define CATCH(EXCEPTION, mask) \
for (struct gdb_exception EXCEPTION; \
exceptions_state_mc_catch (&EXCEPTION, MASK); \
EXCEPTION = exception_none)
would avoid needing END_CATCH, but alas, in C mode, we build with C90,
which doesn't allow mixed declarations and code.
Second, because when TRY/CATCH are wired to real C++ try/catch, as
long as we need to handle cleanup chains, even if there's no CATCH
block that wants to catch the exception, we need for stop at every
frame in the unwind chain and run cleanups, then rethrow. That will
be done in END_CATCH.
After we require C++, we'll still need TRY/CATCH/END_CATCH until
cleanups are completely phased out -- TRY/CATCH in C++ mode will
save/restore the current cleanup chain, like in C mode, and END_CATCH
catches otherwise uncaugh exceptions, runs cleanups and rethrows, so
that C++ cleanups and exceptions can coexist.
IMO, this still makes the TRY/CATCH code look a bit more like a
newcomer would expect, so IMO worth it even if we weren't considering
C++.
gdb/ChangeLog.
2015-03-07 Pedro Alves <palves@redhat.com>
* common/common-exceptions.c (struct catcher) <exception>: No
longer a pointer to volatile exception. Now an exception value.
<mask>: Delete field.
(exceptions_state_mc_init): Remove all parameters. Adjust.
(exceptions_state_mc): No longer pop the catcher here.
(exceptions_state_mc_catch): New function.
(throw_exception): Adjust.
* common/common-exceptions.h (exceptions_state_mc_init): Remove
all parameters.
(exceptions_state_mc_catch): Declare.
(TRY_CATCH): Rename to ...
(TRY): ... this. Remove EXCEPTION and MASK parameters.
(CATCH, END_CATCH): New.
All callers adjusted.
gdb/gdbserver/ChangeLog:
2015-03-07 Pedro Alves <palves@redhat.com>
Adjust all callers of TRY_CATCH to use TRY/CATCH/END_CATCH
instead.
699 lines
18 KiB
C
699 lines
18 KiB
C
/* Scheme interface to symbol tables.
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Copyright (C) 2008-2015 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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/* See README file in this directory for implementation notes, coding
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conventions, et.al. */
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#include "defs.h"
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#include "symtab.h"
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#include "source.h"
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#include "objfiles.h"
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#include "block.h"
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#include "guile-internal.h"
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/* A <gdb:symtab> smob. */
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typedef struct
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{
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/* This always appears first.
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eqable_gdb_smob is used so that symtabs are eq?-able.
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Also, a symtab object is associated with an objfile. eqable_gdb_smob
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lets us track the lifetime of all symtabs associated with an objfile.
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When an objfile is deleted we need to invalidate the symtab object. */
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eqable_gdb_smob base;
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/* The GDB symbol table structure.
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If this is NULL the symtab is invalid. This can happen when the
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underlying objfile is freed. */
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struct symtab *symtab;
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} symtab_smob;
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/* A <gdb:sal> smob.
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A smob describing a gdb symtab-and-line object.
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A sal is associated with an objfile. All access must be gated by checking
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the validity of symtab_scm.
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TODO: Sals are not eq?-able at the moment, or even comparable. */
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typedef struct
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{
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/* This always appears first. */
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gdb_smob base;
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/* The <gdb:symtab> object of the symtab.
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We store this instead of a pointer to the symtab_smob because it's not
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clear GC will know the symtab_smob is referenced by us otherwise, and we
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need quick access to symtab_smob->symtab to know if this sal is valid. */
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SCM symtab_scm;
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/* The GDB symbol table and line structure.
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This object is ephemeral in GDB, so keep our own copy.
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The symtab pointer in this struct is not usable: If the symtab is deleted
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this pointer will not be updated. Use symtab_scm instead to determine
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if this sal is valid. */
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struct symtab_and_line sal;
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} sal_smob;
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static const char symtab_smob_name[] = "gdb:symtab";
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/* "symtab-and-line" is pretty long, and "sal" is short and unique. */
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static const char sal_smob_name[] = "gdb:sal";
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/* The tags Guile knows the symbol table smobs by. */
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static scm_t_bits symtab_smob_tag;
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static scm_t_bits sal_smob_tag;
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static const struct objfile_data *stscm_objfile_data_key;
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/* Administrivia for symtab smobs. */
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/* Helper function to hash a symbol_smob. */
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static hashval_t
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stscm_hash_symtab_smob (const void *p)
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{
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const symtab_smob *st_smob = p;
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return htab_hash_pointer (st_smob->symtab);
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}
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/* Helper function to compute equality of symtab_smobs. */
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static int
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stscm_eq_symtab_smob (const void *ap, const void *bp)
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{
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const symtab_smob *a = ap;
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const symtab_smob *b = bp;
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return (a->symtab == b->symtab
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&& a->symtab != NULL);
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}
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/* Return the struct symtab pointer -> SCM mapping table.
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It is created if necessary. */
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static htab_t
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stscm_objfile_symtab_map (struct symtab *symtab)
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{
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struct objfile *objfile = SYMTAB_OBJFILE (symtab);
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htab_t htab = objfile_data (objfile, stscm_objfile_data_key);
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if (htab == NULL)
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{
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htab = gdbscm_create_eqable_gsmob_ptr_map (stscm_hash_symtab_smob,
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stscm_eq_symtab_smob);
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set_objfile_data (objfile, stscm_objfile_data_key, htab);
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}
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return htab;
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}
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/* The smob "free" function for <gdb:symtab>. */
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static size_t
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stscm_free_symtab_smob (SCM self)
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{
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symtab_smob *st_smob = (symtab_smob *) SCM_SMOB_DATA (self);
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if (st_smob->symtab != NULL)
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{
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htab_t htab = stscm_objfile_symtab_map (st_smob->symtab);
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gdbscm_clear_eqable_gsmob_ptr_slot (htab, &st_smob->base);
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}
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/* Not necessary, done to catch bugs. */
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st_smob->symtab = NULL;
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return 0;
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}
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/* The smob "print" function for <gdb:symtab>. */
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static int
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stscm_print_symtab_smob (SCM self, SCM port, scm_print_state *pstate)
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{
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symtab_smob *st_smob = (symtab_smob *) SCM_SMOB_DATA (self);
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gdbscm_printf (port, "#<%s ", symtab_smob_name);
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gdbscm_printf (port, "%s",
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st_smob->symtab != NULL
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? symtab_to_filename_for_display (st_smob->symtab)
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: "<invalid>");
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scm_puts (">", port);
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scm_remember_upto_here_1 (self);
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/* Non-zero means success. */
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return 1;
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}
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/* Low level routine to create a <gdb:symtab> object. */
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static SCM
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stscm_make_symtab_smob (void)
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{
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symtab_smob *st_smob = (symtab_smob *)
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scm_gc_malloc (sizeof (symtab_smob), symtab_smob_name);
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SCM st_scm;
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st_smob->symtab = NULL;
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st_scm = scm_new_smob (symtab_smob_tag, (scm_t_bits) st_smob);
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gdbscm_init_eqable_gsmob (&st_smob->base, st_scm);
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return st_scm;
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}
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/* Return non-zero if SCM is a symbol table smob. */
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static int
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stscm_is_symtab (SCM scm)
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{
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return SCM_SMOB_PREDICATE (symtab_smob_tag, scm);
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}
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/* (symtab? object) -> boolean */
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static SCM
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gdbscm_symtab_p (SCM scm)
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{
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return scm_from_bool (stscm_is_symtab (scm));
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}
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/* Create a new <gdb:symtab> object that encapsulates SYMTAB. */
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SCM
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stscm_scm_from_symtab (struct symtab *symtab)
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{
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htab_t htab;
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eqable_gdb_smob **slot;
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symtab_smob *st_smob, st_smob_for_lookup;
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SCM st_scm;
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/* If we've already created a gsmob for this symtab, return it.
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This makes symtabs eq?-able. */
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htab = stscm_objfile_symtab_map (symtab);
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st_smob_for_lookup.symtab = symtab;
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slot = gdbscm_find_eqable_gsmob_ptr_slot (htab, &st_smob_for_lookup.base);
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if (*slot != NULL)
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return (*slot)->containing_scm;
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st_scm = stscm_make_symtab_smob ();
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st_smob = (symtab_smob *) SCM_SMOB_DATA (st_scm);
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st_smob->symtab = symtab;
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gdbscm_fill_eqable_gsmob_ptr_slot (slot, &st_smob->base);
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return st_scm;
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}
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/* Returns the <gdb:symtab> object in SELF.
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Throws an exception if SELF is not a <gdb:symtab> object. */
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static SCM
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stscm_get_symtab_arg_unsafe (SCM self, int arg_pos, const char *func_name)
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{
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SCM_ASSERT_TYPE (stscm_is_symtab (self), self, arg_pos, func_name,
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symtab_smob_name);
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return self;
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}
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/* Returns a pointer to the symtab smob of SELF.
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Throws an exception if SELF is not a <gdb:symtab> object. */
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static symtab_smob *
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stscm_get_symtab_smob_arg_unsafe (SCM self, int arg_pos, const char *func_name)
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{
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SCM st_scm = stscm_get_symtab_arg_unsafe (self, arg_pos, func_name);
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symtab_smob *st_smob = (symtab_smob *) SCM_SMOB_DATA (st_scm);
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return st_smob;
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}
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/* Return non-zero if symtab ST_SMOB is valid. */
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static int
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stscm_is_valid (symtab_smob *st_smob)
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{
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return st_smob->symtab != NULL;
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}
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/* Throw a Scheme error if SELF is not a valid symtab smob.
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Otherwise return a pointer to the symtab_smob object. */
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static symtab_smob *
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stscm_get_valid_symtab_smob_arg_unsafe (SCM self, int arg_pos,
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const char *func_name)
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{
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symtab_smob *st_smob
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= stscm_get_symtab_smob_arg_unsafe (self, arg_pos, func_name);
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if (!stscm_is_valid (st_smob))
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{
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gdbscm_invalid_object_error (func_name, arg_pos, self,
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_("<gdb:symtab>"));
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}
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return st_smob;
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}
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/* Helper function for stscm_del_objfile_symtabs to mark the symtab
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as invalid. */
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static int
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stscm_mark_symtab_invalid (void **slot, void *info)
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{
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symtab_smob *st_smob = (symtab_smob *) *slot;
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st_smob->symtab = NULL;
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return 1;
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}
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/* This function is called when an objfile is about to be freed.
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Invalidate the symbol table as further actions on the symbol table
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would result in bad data. All access to st_smob->symtab should be
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gated by stscm_get_valid_symtab_smob_arg_unsafe which will raise an
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exception on invalid symbol tables. */
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static void
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stscm_del_objfile_symtabs (struct objfile *objfile, void *datum)
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{
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htab_t htab = datum;
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if (htab != NULL)
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{
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htab_traverse_noresize (htab, stscm_mark_symtab_invalid, NULL);
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htab_delete (htab);
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}
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}
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/* Symbol table methods. */
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/* (symtab-valid? <gdb:symtab>) -> boolean
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Returns #t if SELF still exists in GDB. */
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static SCM
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gdbscm_symtab_valid_p (SCM self)
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{
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symtab_smob *st_smob
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= stscm_get_symtab_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
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return scm_from_bool (stscm_is_valid (st_smob));
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}
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/* (symtab-filename <gdb:symtab>) -> string */
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static SCM
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gdbscm_symtab_filename (SCM self)
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{
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symtab_smob *st_smob
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= stscm_get_valid_symtab_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
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struct symtab *symtab = st_smob->symtab;
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return gdbscm_scm_from_c_string (symtab_to_filename_for_display (symtab));
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}
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/* (symtab-fullname <gdb:symtab>) -> string */
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static SCM
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gdbscm_symtab_fullname (SCM self)
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{
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symtab_smob *st_smob
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= stscm_get_valid_symtab_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
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struct symtab *symtab = st_smob->symtab;
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return gdbscm_scm_from_c_string (symtab_to_fullname (symtab));
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}
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/* (symtab-objfile <gdb:symtab>) -> <gdb:objfile> */
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static SCM
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gdbscm_symtab_objfile (SCM self)
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{
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symtab_smob *st_smob
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= stscm_get_valid_symtab_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
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const struct symtab *symtab = st_smob->symtab;
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return ofscm_scm_from_objfile (SYMTAB_OBJFILE (symtab));
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}
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/* (symtab-global-block <gdb:symtab>) -> <gdb:block>
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Return the GLOBAL_BLOCK of the underlying symtab. */
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static SCM
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gdbscm_symtab_global_block (SCM self)
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{
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symtab_smob *st_smob
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= stscm_get_valid_symtab_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
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const struct symtab *symtab = st_smob->symtab;
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const struct blockvector *blockvector;
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const struct block *block;
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blockvector = SYMTAB_BLOCKVECTOR (symtab);
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block = BLOCKVECTOR_BLOCK (blockvector, GLOBAL_BLOCK);
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return bkscm_scm_from_block (block, SYMTAB_OBJFILE (symtab));
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}
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/* (symtab-static-block <gdb:symtab>) -> <gdb:block>
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Return the STATIC_BLOCK of the underlying symtab. */
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static SCM
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gdbscm_symtab_static_block (SCM self)
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{
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symtab_smob *st_smob
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= stscm_get_valid_symtab_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
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const struct symtab *symtab = st_smob->symtab;
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const struct blockvector *blockvector;
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const struct block *block;
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blockvector = SYMTAB_BLOCKVECTOR (symtab);
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block = BLOCKVECTOR_BLOCK (blockvector, STATIC_BLOCK);
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return bkscm_scm_from_block (block, SYMTAB_OBJFILE (symtab));
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}
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/* Administrivia for sal (symtab-and-line) smobs. */
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/* The smob "print" function for <gdb:sal>. */
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static int
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stscm_print_sal_smob (SCM self, SCM port, scm_print_state *pstate)
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{
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sal_smob *s_smob = (sal_smob *) SCM_SMOB_DATA (self);
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symtab_smob *st_smob = (symtab_smob *) SCM_SMOB_DATA (s_smob->symtab_scm);
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gdbscm_printf (port, "#<%s ", symtab_smob_name);
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scm_write (s_smob->symtab_scm, port);
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if (s_smob->sal.line != 0)
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gdbscm_printf (port, " line %d", s_smob->sal.line);
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scm_puts (">", port);
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scm_remember_upto_here_1 (self);
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/* Non-zero means success. */
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return 1;
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}
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/* Low level routine to create a <gdb:sal> object. */
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static SCM
|
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stscm_make_sal_smob (void)
|
||
{
|
||
sal_smob *s_smob
|
||
= (sal_smob *) scm_gc_malloc (sizeof (sal_smob), sal_smob_name);
|
||
SCM s_scm;
|
||
|
||
s_smob->symtab_scm = SCM_BOOL_F;
|
||
memset (&s_smob->sal, 0, sizeof (s_smob->sal));
|
||
s_scm = scm_new_smob (sal_smob_tag, (scm_t_bits) s_smob);
|
||
gdbscm_init_gsmob (&s_smob->base);
|
||
|
||
return s_scm;
|
||
}
|
||
|
||
/* Return non-zero if SCM is a <gdb:sal> object. */
|
||
|
||
static int
|
||
stscm_is_sal (SCM scm)
|
||
{
|
||
return SCM_SMOB_PREDICATE (sal_smob_tag, scm);
|
||
}
|
||
|
||
/* (sal? object) -> boolean */
|
||
|
||
static SCM
|
||
gdbscm_sal_p (SCM scm)
|
||
{
|
||
return scm_from_bool (stscm_is_sal (scm));
|
||
}
|
||
|
||
/* Create a new <gdb:sal> object that encapsulates SAL. */
|
||
|
||
SCM
|
||
stscm_scm_from_sal (struct symtab_and_line sal)
|
||
{
|
||
SCM st_scm, s_scm;
|
||
sal_smob *s_smob;
|
||
|
||
st_scm = SCM_BOOL_F;
|
||
if (sal.symtab != NULL)
|
||
st_scm = stscm_scm_from_symtab (sal.symtab);
|
||
|
||
s_scm = stscm_make_sal_smob ();
|
||
s_smob = (sal_smob *) SCM_SMOB_DATA (s_scm);
|
||
s_smob->symtab_scm = st_scm;
|
||
s_smob->sal = sal;
|
||
|
||
return s_scm;
|
||
}
|
||
|
||
/* Returns the <gdb:sal> object in SELF.
|
||
Throws an exception if SELF is not a <gdb:sal> object. */
|
||
|
||
static SCM
|
||
stscm_get_sal_arg (SCM self, int arg_pos, const char *func_name)
|
||
{
|
||
SCM_ASSERT_TYPE (stscm_is_sal (self), self, arg_pos, func_name,
|
||
sal_smob_name);
|
||
|
||
return self;
|
||
}
|
||
|
||
/* Returns a pointer to the sal smob of SELF.
|
||
Throws an exception if SELF is not a <gdb:sal> object. */
|
||
|
||
static sal_smob *
|
||
stscm_get_sal_smob_arg (SCM self, int arg_pos, const char *func_name)
|
||
{
|
||
SCM s_scm = stscm_get_sal_arg (self, arg_pos, func_name);
|
||
sal_smob *s_smob = (sal_smob *) SCM_SMOB_DATA (s_scm);
|
||
|
||
return s_smob;
|
||
}
|
||
|
||
/* Return non-zero if the symtab in S_SMOB is valid. */
|
||
|
||
static int
|
||
stscm_sal_is_valid (sal_smob *s_smob)
|
||
{
|
||
symtab_smob *st_smob;
|
||
|
||
/* If there's no symtab that's ok, the sal is still valid. */
|
||
if (gdbscm_is_false (s_smob->symtab_scm))
|
||
return 1;
|
||
|
||
st_smob = (symtab_smob *) SCM_SMOB_DATA (s_smob->symtab_scm);
|
||
|
||
return st_smob->symtab != NULL;
|
||
}
|
||
|
||
/* Throw a Scheme error if SELF is not a valid sal smob.
|
||
Otherwise return a pointer to the sal_smob object. */
|
||
|
||
static sal_smob *
|
||
stscm_get_valid_sal_smob_arg (SCM self, int arg_pos, const char *func_name)
|
||
{
|
||
sal_smob *s_smob = stscm_get_sal_smob_arg (self, arg_pos, func_name);
|
||
|
||
if (!stscm_sal_is_valid (s_smob))
|
||
{
|
||
gdbscm_invalid_object_error (func_name, arg_pos, self,
|
||
_("<gdb:sal>"));
|
||
}
|
||
|
||
return s_smob;
|
||
}
|
||
|
||
/* sal methods */
|
||
|
||
/* (sal-valid? <gdb:sal>) -> boolean
|
||
Returns #t if the symtab for SELF still exists in GDB. */
|
||
|
||
static SCM
|
||
gdbscm_sal_valid_p (SCM self)
|
||
{
|
||
sal_smob *s_smob = stscm_get_sal_smob_arg (self, SCM_ARG1, FUNC_NAME);
|
||
|
||
return scm_from_bool (stscm_sal_is_valid (s_smob));
|
||
}
|
||
|
||
/* (sal-pc <gdb:sal>) -> address */
|
||
|
||
static SCM
|
||
gdbscm_sal_pc (SCM self)
|
||
{
|
||
sal_smob *s_smob = stscm_get_valid_sal_smob_arg (self, SCM_ARG1, FUNC_NAME);
|
||
const struct symtab_and_line *sal = &s_smob->sal;
|
||
|
||
return gdbscm_scm_from_ulongest (sal->pc);
|
||
}
|
||
|
||
/* (sal-last <gdb:sal>) -> address
|
||
Returns #f if no ending address is recorded. */
|
||
|
||
static SCM
|
||
gdbscm_sal_last (SCM self)
|
||
{
|
||
sal_smob *s_smob = stscm_get_valid_sal_smob_arg (self, SCM_ARG1, FUNC_NAME);
|
||
const struct symtab_and_line *sal = &s_smob->sal;
|
||
|
||
if (sal->end > 0)
|
||
return gdbscm_scm_from_ulongest (sal->end - 1);
|
||
return SCM_BOOL_F;
|
||
}
|
||
|
||
/* (sal-line <gdb:sal>) -> integer
|
||
Returns #f if no line number is recorded. */
|
||
|
||
static SCM
|
||
gdbscm_sal_line (SCM self)
|
||
{
|
||
sal_smob *s_smob = stscm_get_valid_sal_smob_arg (self, SCM_ARG1, FUNC_NAME);
|
||
const struct symtab_and_line *sal = &s_smob->sal;
|
||
|
||
if (sal->line > 0)
|
||
return scm_from_int (sal->line);
|
||
return SCM_BOOL_F;
|
||
}
|
||
|
||
/* (sal-symtab <gdb:sal>) -> <gdb:symtab>
|
||
Returns #f if no symtab is recorded. */
|
||
|
||
static SCM
|
||
gdbscm_sal_symtab (SCM self)
|
||
{
|
||
sal_smob *s_smob = stscm_get_valid_sal_smob_arg (self, SCM_ARG1, FUNC_NAME);
|
||
const struct symtab_and_line *sal = &s_smob->sal;
|
||
|
||
return s_smob->symtab_scm;
|
||
}
|
||
|
||
/* (find-pc-line address) -> <gdb:sal> */
|
||
|
||
static SCM
|
||
gdbscm_find_pc_line (SCM pc_scm)
|
||
{
|
||
ULONGEST pc_ull;
|
||
struct symtab_and_line sal;
|
||
|
||
init_sal (&sal); /* -Wall */
|
||
|
||
gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, NULL, "U", pc_scm, &pc_ull);
|
||
|
||
TRY
|
||
{
|
||
CORE_ADDR pc = (CORE_ADDR) pc_ull;
|
||
|
||
sal = find_pc_line (pc, 0);
|
||
}
|
||
CATCH (except, RETURN_MASK_ALL)
|
||
{
|
||
GDBSCM_HANDLE_GDB_EXCEPTION (except);
|
||
}
|
||
END_CATCH
|
||
|
||
return stscm_scm_from_sal (sal);
|
||
}
|
||
|
||
/* Initialize the Scheme symbol support. */
|
||
|
||
static const scheme_function symtab_functions[] =
|
||
{
|
||
{ "symtab?", 1, 0, 0, gdbscm_symtab_p,
|
||
"\
|
||
Return #t if the object is a <gdb:symtab> object." },
|
||
|
||
{ "symtab-valid?", 1, 0, 0, gdbscm_symtab_valid_p,
|
||
"\
|
||
Return #t if the symtab still exists in GDB.\n\
|
||
Symtabs are deleted when the corresponding objfile is freed." },
|
||
|
||
{ "symtab-filename", 1, 0, 0, gdbscm_symtab_filename,
|
||
"\
|
||
Return the symtab's source file name." },
|
||
|
||
{ "symtab-fullname", 1, 0, 0, gdbscm_symtab_fullname,
|
||
"\
|
||
Return the symtab's full source file name." },
|
||
|
||
{ "symtab-objfile", 1, 0, 0, gdbscm_symtab_objfile,
|
||
"\
|
||
Return the symtab's objfile." },
|
||
|
||
{ "symtab-global-block", 1, 0, 0, gdbscm_symtab_global_block,
|
||
"\
|
||
Return the symtab's global block." },
|
||
|
||
{ "symtab-static-block", 1, 0, 0, gdbscm_symtab_static_block,
|
||
"\
|
||
Return the symtab's static block." },
|
||
|
||
{ "sal?", 1, 0, 0, gdbscm_sal_p,
|
||
"\
|
||
Return #t if the object is a <gdb:sal> (symtab-and-line) object." },
|
||
|
||
{ "sal-valid?", 1, 0, 0, gdbscm_sal_valid_p,
|
||
"\
|
||
Return #t if the symtab for the sal still exists in GDB.\n\
|
||
Symtabs are deleted when the corresponding objfile is freed." },
|
||
|
||
{ "sal-symtab", 1, 0, 0, gdbscm_sal_symtab,
|
||
"\
|
||
Return the sal's symtab." },
|
||
|
||
{ "sal-line", 1, 0, 0, gdbscm_sal_line,
|
||
"\
|
||
Return the sal's line number, or #f if there is none." },
|
||
|
||
{ "sal-pc", 1, 0, 0, gdbscm_sal_pc,
|
||
"\
|
||
Return the sal's address." },
|
||
|
||
{ "sal-last", 1, 0, 0, gdbscm_sal_last,
|
||
"\
|
||
Return the last address specified by the sal, or #f if there is none." },
|
||
|
||
{ "find-pc-line", 1, 0, 0, gdbscm_find_pc_line,
|
||
"\
|
||
Return the sal corresponding to the address, or #f if there isn't one.\n\
|
||
\n\
|
||
Arguments: address" },
|
||
|
||
END_FUNCTIONS
|
||
};
|
||
|
||
void
|
||
gdbscm_initialize_symtabs (void)
|
||
{
|
||
symtab_smob_tag
|
||
= gdbscm_make_smob_type (symtab_smob_name, sizeof (symtab_smob));
|
||
scm_set_smob_free (symtab_smob_tag, stscm_free_symtab_smob);
|
||
scm_set_smob_print (symtab_smob_tag, stscm_print_symtab_smob);
|
||
|
||
sal_smob_tag = gdbscm_make_smob_type (sal_smob_name, sizeof (sal_smob));
|
||
scm_set_smob_print (sal_smob_tag, stscm_print_sal_smob);
|
||
|
||
gdbscm_define_functions (symtab_functions, 1);
|
||
|
||
/* Register an objfile "free" callback so we can properly
|
||
invalidate symbol tables, and symbol table and line data
|
||
structures when an object file that is about to be deleted. */
|
||
stscm_objfile_data_key
|
||
= register_objfile_data_with_cleanup (NULL, stscm_del_objfile_symtabs);
|
||
}
|