gdb/gdb/frame.c

38 #include "frame-unwind.h"
68      ->unwind->type.  Unfortunately, legacy code is still explicitly
91      for the previous frame.  The low-level unwind methods are
92      selected based on the presence, or otherwize, of register unwind
95   const struct frame_unwind *unwind;
186   fprintf_unfiltered (file, "unwind=");
187   if (fi->unwind != NULL)
188     gdb_print_host_address (fi->unwind, file);
229       if (fi->unwind == NULL)
231 	  fi->unwind = frame_unwind_find_by_frame (fi->next);
237 	  fi->type = fi->unwind->type;
240       fi->unwind->this_id (fi->next, &fi->prologue_cache, &fi->this_id.value);
384 	     method depends solely on the register-unwind code to
393 	     register-unwind implementation, it pays to fix that
526   /* NOTE: cagney/2002-11-27: A program trying to unwind a NULL frame
533   if (frame->unwind == NULL)
535       frame->unwind = frame_unwind_find_by_frame (frame->next);
541       frame->type = frame->unwind->type;
544   /* Ask this frame to unwind its register.  See comment in
545      "frame-unwind.h" for why NEXT frame and this unwind cace are
547   frame->unwind->prev_register (frame->next, &frame->prologue_cache, regnum,
764   frame->unwind = sentinel_frame_unwind;
815    is wrapped in catch exceptions so that, even when the unwind of the
822   /* A sentinel frame can fail to unwind, eg, because it's PC value
1020      value.  Pass the unwind request down the frame chain to the next
1032      by providing a default unwinder that refuses to unwind anything
1192   /* Select/initialize both the unwind function and the frame's type
1194   fi->unwind = frame_unwind_find_by_frame (fi->next);
1195   if (fi->unwind->type != UNKNOWN_FRAME)
1196     fi->type = fi->unwind->type;
1309   /* Handle sentinel frame unwind as a special case.  */
1312       /* Try to unwind the PC.  If that doesn't work, assume we've reached
1317 	 Note that the pc-unwind is intentionally performed before the
1345       /* Set the unwind functions based on that identified PC.  Ditto
1347       prev->unwind = frame_unwind_find_by_frame (prev->next);
1348       if (prev->unwind->type == UNKNOWN_FRAME)
1351 	prev->type = prev->unwind->type;
1363 	     PC to apply standard frame ID unwind techniques is just
1397 	 next) the old frame.  If that happens the frame unwind is
1410 	 (passed to the unwind functions) to store additional frame
1412 	 legacy_get_prev_frame() to unwind the sentinel frame and,
1496 	  prev->unwind = frame_unwind_find_by_frame (this_frame->next);
1502 	  prev->type = prev->unwind->type;
1504 	  prev->unwind->this_id (this_frame,
1593      user-visible inner-most frame (...) and then unwind from that.
1598      Since there is always a frame to unwind from, there is always
1649   /* Initialize the code used to unwind the frame PREV based on the PC
1656   if (prev->unwind == NULL)
1657     prev->unwind = frame_unwind_find_by_frame (prev->next);
1661   if (prev->unwind->type != UNKNOWN_FRAME)
1663       prev->type = prev->unwind->type;
1795     /* Don't unwind past main(), bug always unwind the sentinel frame.
1814      be allowed to unwind.  */
1851      will never unwind a zero PC.  */
1866   /* Only try to do the unwind once.  */
1882      Sentinel frames should always be allowed to unwind.  */
1922      unwind to the prev frame.  Be careful to not apply this test to
1936      the next frame.  This happens when a frame unwind goes backwards.
1965   /* Don't yet compute ->unwind (and hence ->type).  It is computed
2072   /* Sneaky: If the low-level unwind and high-level base code share a
2074   if (fi->base->unwind == fi->unwind)
2088   /* Sneaky: If the low-level unwind and high-level base code share a
2090   if (fi->base->unwind == fi->unwind)
2106   /* Sneaky: If the low-level unwind and high-level base code share a
2108   if (fi->base->unwind == fi->unwind)
2138      initialized.  Don't attempt to lazily initialize ->unwind for
2140   if (frame->unwind == NULL && !legacy_frame_p (current_gdbarch))
2144       frame->unwind = frame_unwind_find_by_frame (frame->next);
2150       frame->type = frame->unwind->type;
2289   internal_error (__FILE__, __LINE__, "Missing unwind SP method");