#include "defs.h"
#include "frame.h"
#include "frame-unwind.h"
#include "gdb_assert.h"
#include "dummy-frame.h"
static struct gdbarch_data *frame_unwind_data;
struct frame_unwind_table
{
frame_unwind_sniffer_ftype **sniffer;
int nr;
};
static void
append_predicate (struct frame_unwind_table *table,
frame_unwind_sniffer_ftype *sniffer)
{
table->sniffer = xrealloc (table->sniffer, ((table->nr + 1)
* sizeof (frame_unwind_sniffer_ftype *)));
table->sniffer[table->nr] = sniffer;
table->nr++;
}
static void *
frame_unwind_init (struct gdbarch *gdbarch)
{
struct frame_unwind_table *table = XCALLOC (1, struct frame_unwind_table);
append_predicate (table, dummy_frame_sniffer);
return table;
}
void
frame_unwind_append_sniffer (struct gdbarch *gdbarch,
frame_unwind_sniffer_ftype *sniffer)
{
struct frame_unwind_table *table =
gdbarch_data (gdbarch, frame_unwind_data);
if (table == NULL)
{
table = frame_unwind_init (gdbarch);
set_gdbarch_data (gdbarch, frame_unwind_data, table);
}
append_predicate (table, sniffer);
}
const struct frame_unwind *
frame_unwind_find_by_frame (struct frame_info *next_frame)
{
int i;
struct gdbarch *gdbarch = get_frame_arch (next_frame);
struct frame_unwind_table *table = gdbarch_data (gdbarch, frame_unwind_data);
if (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES && legacy_frame_p (gdbarch))
return legacy_saved_regs_unwind;
for (i = 0; i < table->nr; i++)
{
const struct frame_unwind *desc;
desc = table->sniffer[i] (next_frame);
if (desc != NULL)
return desc;
}
return legacy_saved_regs_unwind;
}
extern initialize_file_ftype _initialize_frame_unwind;
void
_initialize_frame_unwind (void)
{
frame_unwind_data = register_gdbarch_data (frame_unwind_init);
}