struct macro_scope *
default_macro_scope (void)
{
struct symtab_and_line sal;
struct macro_scope *ms;
struct frame_info *frame;
/* If there's a selected frame, use its PC. */
frame = deprecated_safe_get_selected_frame ();
if (frame)
sal = find_pc_line (get_frame_pc (frame), 0);
/* Fall back to the current listing position. */
else
{
/* Don't call select_source_symtab here. That can raise an
error if symbols aren't loaded, but GDB calls the expression
evaluator in all sorts of contexts.
For example, commands like `set width' call the expression
evaluator to evaluate their numeric arguments. If the
current language is C, then that may call this function to
choose a scope for macro expansion. If you don't have any
symbol files loaded, then get_current_or_default would raise an
error. But `set width' shouldn't raise an error just because
it can't decide which scope to macro-expand its argument in. */
struct symtab_and_line cursal =
get_current_source_symtab_and_line ();
sal.symtab = cursal.symtab;
sal.line = cursal.line;
}
return sal_macro_scope (sal);
}
static int
c_preprocess_and_parse (void)
{
/* Set up a lookup function for the macro expander. */
struct macro_scope *scope = 0;
struct cleanup *back_to = make_cleanup (free_current_contents, &scope);
if (expression_context_block)
scope = sal_macro_scope (find_pc_line (expression_context_pc, 0));
else
scope = default_macro_scope ();
if (scope)
{
expression_macro_lookup_func = standard_macro_lookup;
expression_macro_lookup_baton = (void *) scope;
}
else
{
expression_macro_lookup_func = null_macro_lookup;
expression_macro_lookup_baton = 0;
}
gdb_assert (! macro_original_text);
make_cleanup (scan_macro_cleanup, 0);
{
int result = c_parse ();
do_cleanups (back_to);
return result;
}
}
static void
write_macro_definitions (const struct block *block, CORE_ADDR pc,
struct ui_file *file)
{
struct macro_scope *scope;
if (block != NULL)
scope = sal_macro_scope (find_pc_line (pc, 0));
else
scope = default_macro_scope ();
if (scope == NULL)
scope = user_macro_scope ();
if (scope != NULL && scope->file != NULL && scope->file->table != NULL)
macro_for_each_in_scope (scope->file, scope->line, print_one_macro, file);
}
/* Implementation of the "info macros" command. */
static void
info_macros_command (const char *args, int from_tty)
{
gdb::unique_xmalloc_ptr<struct macro_scope> ms;
if (args == NULL)
ms = default_macro_scope ();
else
{
std::vector<symtab_and_line> sals
= decode_line_with_current_source (args, 0);
if (!sals.empty ())
ms = sal_macro_scope (sals[0]);
}
if (! ms || ! ms->file || ! ms->file->table)
macro_inform_no_debuginfo ();
else
macro_for_each_in_scope (ms->file, ms->line, print_macro_definition);
}
/* Implementation of the "info macros" command. */
static void
info_macros_command (char *args, int from_tty)
{
struct macro_scope *ms = NULL;
struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &ms);
if (args == NULL)
ms = default_macro_scope ();
else
{
struct symtabs_and_lines sals =
decode_line_with_current_source (args, 0);
if (sals.nelts)
ms = sal_macro_scope (sals.sals[0]);
}
if (! ms || ! ms->file || ! ms->file->table)
macro_inform_no_debuginfo ();
else
macro_for_each_in_scope (ms->file, ms->line, print_macro_callback, NULL);
do_cleanups (cleanup_chain);
}
struct macro_scope *
default_macro_scope (void)
{
struct symtab_and_line sal;
struct macro_source_file *main;
struct macro_scope *ms;
/* If there's a selected frame, use its PC. */
if (selected_frame)
sal = find_pc_line (selected_frame->pc, 0);
/* If the target has any registers at all, then use its PC. Why we
would have registers but no stack, I'm not sure. */
else if (target_has_registers)
sal = find_pc_line (read_pc (), 0);
/* If all else fails, fall back to the current listing position. */
else
{
/* Don't call select_source_symtab here. That can raise an
error if symbols aren't loaded, but GDB calls the expression
evaluator in all sorts of contexts.
For example, commands like `set width' call the expression
evaluator to evaluate their numeric arguments. If the
current language is C, then that may call this function to
choose a scope for macro expansion. If you don't have any
symbol files loaded, then select_source_symtab will raise an
error. But `set width' shouldn't raise an error just because
it can't decide which scope to macro-expand its argument in. */
sal.symtab = current_source_symtab;
sal.line = current_source_line;
}
return sal_macro_scope (sal);
}
