static void backtrace_command (char *, int);
-struct frame_info *parse_frame_specification (char *);
-
static void frame_info (char *, int);
extern int addressprint; /* Print addresses, or stay symbolic only? */
\f
/* Read a frame specification in whatever the appropriate format is.
- Call error() if the specification is in any way invalid (i.e.
- this function never returns NULL). */
+ Call error() if the specification is in any way invalid (i.e. this
+ function never returns NULL). When SEPECTED_P is non-NULL set it's
+ target to indicate that the default selected frame was used. */
-struct frame_info *
-parse_frame_specification (char *frame_exp)
+static struct frame_info *
+parse_frame_specification_1 (const char *frame_exp, const char *message,
+ int *selected_frame_p)
{
- int numargs = 0;
-#define MAXARGS 4
- CORE_ADDR args[MAXARGS];
- int level;
+ int numargs;
+ struct value *args[4];
+ CORE_ADDR addrs[ARRAY_SIZE (args)];
- if (frame_exp)
+ if (frame_exp == NULL)
+ numargs = 0;
+ else
{
- char *addr_string, *p;
+ char *addr_string;
struct cleanup *tmp_cleanup;
- while (*frame_exp == ' ')
- frame_exp++;
-
- while (*frame_exp)
+ numargs = 0;
+ while (1)
{
- if (numargs > MAXARGS)
- error ("Too many args in frame specification");
- /* Parse an argument. */
- for (p = frame_exp; *p && *p != ' '; p++)
- ;
- addr_string = savestring (frame_exp, p - frame_exp);
-
- {
- struct value *vp;
-
- tmp_cleanup = make_cleanup (xfree, addr_string);
-
- /* NOTE: we call parse_and_eval and then both
- value_as_long and value_as_address rather than calling
- parse_and_eval_long and parse_and_eval_address because
- of the issue of potential side effects from evaluating
- the expression. */
- vp = parse_and_eval (addr_string);
- if (numargs == 0)
- level = value_as_long (vp);
-
- args[numargs++] = value_as_address (vp);
- do_cleanups (tmp_cleanup);
- }
+ char *addr_string;
+ struct cleanup *cleanup;
+ const char *p;
+
+ /* Skip leading white space, bail of EOL. */
+ while (isspace (*frame_exp))
+ frame_exp++;
+ if (!*frame_exp)
+ break;
- /* Skip spaces, move to possible next arg. */
- while (*p == ' ')
- p++;
+ /* Parse the argument, extract it, save it. */
+ for (p = frame_exp;
+ *p && !isspace (*p);
+ p++);
+ addr_string = savestring (frame_exp, p - frame_exp);
frame_exp = p;
+ cleanup = make_cleanup (xfree, addr_string);
+
+ /* NOTE: Parse and evaluate expression, but do not use
+ functions such as parse_and_eval_long or
+ parse_and_eval_address to also extract the value.
+ Instead value_as_long and value_as_address are used.
+ This avoids problems with expressions that contain
+ side-effects. */
+ if (numargs >= ARRAY_SIZE (args))
+ error ("Too many args in frame specification");
+ args[numargs++] = parse_and_eval (addr_string);
+
+ do_cleanups (cleanup);
}
}
- switch (numargs)
+ /* If no args, default to the selected frame. */
+ if (numargs == 0)
{
- case 0:
- if (deprecated_selected_frame == NULL)
- error ("No selected frame.");
- return deprecated_selected_frame;
- /* NOTREACHED */
- case 1:
- {
- struct frame_info *fid =
- find_relative_frame (get_current_frame (), &level);
- struct frame_info *tfid;
-
- if (level == 0)
- /* find_relative_frame was successful */
- return fid;
-
- /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
- take at least 2 addresses. It is important to detect this case
- here so that "frame 100" does not give a confusing error message
- like "frame specification requires two addresses". This of course
- does not solve the "frame 100" problem for machines on which
- a frame specification can be made with one address. To solve
- that, we need a new syntax for a specifying a frame by address.
- I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
- two args, etc.), but people might think that is too much typing,
- so I guess *0x23,0x45 would be a possible alternative (commas
- really should be used instead of spaces to delimit; using spaces
- normally works in an expression). */
-#ifdef SETUP_ARBITRARY_FRAME
- error ("No frame %s", paddr_d (args[0]));
-#endif
+ if (selected_frame_p != NULL)
+ (*selected_frame_p) = 1;
+ return get_selected_frame (message);
+ }
- /* If (s)he specifies the frame with an address, he deserves what
- (s)he gets. Still, give the highest one that matches. */
+ /* None of the remaining use the selected frame. */
+ if (selected_frame_p != NULL)
+ (*selected_frame_p) = 1;
- for (fid = get_current_frame ();
- fid && get_frame_base (fid) != args[0];
- fid = get_prev_frame (fid))
- ;
+ /* Assume the single arg[0] is an integer, and try using that to
+ select a frame relative to current. */
+ if (numargs == 1)
+ {
+ struct frame_info *fid;
+ int level = value_as_long (args[0]);
+ fid = find_relative_frame (get_current_frame (), &level);
+ if (level == 0)
+ /* find_relative_frame was successful */
+ return fid;
+ }
- if (fid)
- while ((tfid = get_prev_frame (fid)) &&
- (get_frame_base (tfid) == args[0]))
- fid = tfid;
+ /* Convert each value into a corresponding address. */
+ {
+ int i;
+ for (i = 0; i < numargs; i++)
+ addrs[i] = value_as_address (args[0]);
+ }
- /* We couldn't identify the frame as an existing frame, but
- perhaps we can create one with a single argument. */
+ /* Assume that the single arg[0] is an address, use that to identify
+ a frame with a matching ID. Should this also accept stack/pc or
+ stack/pc/special. */
+ if (numargs == 1)
+ {
+ struct frame_id id = frame_id_build_wild (addrs[0]);
+ struct frame_info *fid;
+
+ /* If SETUP_ARBITRARY_FRAME is defined, then frame
+ specifications take at least 2 addresses. It is important to
+ detect this case here so that "frame 100" does not give a
+ confusing error message like "frame specification requires
+ two addresses". This of course does not solve the "frame
+ 100" problem for machines on which a frame specification can
+ be made with one address. To solve that, we need a new
+ syntax for a specifying a frame by address. I think the
+ cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for two
+ args, etc.), but people might think that is too much typing,
+ so I guess *0x23,0x45 would be a possible alternative (commas
+ really should be used instead of spaces to delimit; using
+ spaces normally works in an expression). */
+#ifdef SETUP_ARBITRARY_FRAME
+ error ("No frame %s", paddr_d (addrs[0]));
+#endif
+ /* If (s)he specifies the frame with an address, he deserves
+ what (s)he gets. Still, give the highest one that matches.
+ (NOTE: cagney/2004-10-29: Why highest, or outer-most, I don't
+ know). */
+ for (fid = get_current_frame ();
+ fid != NULL;
+ fid = get_prev_frame (fid))
+ {
+ if (frame_id_eq (id, get_frame_id (fid)))
+ {
+ while (frame_id_eq (id, frame_unwind_id (fid)))
+ fid = get_prev_frame (fid);
+ return fid;
+ }
+ }
}
- default:
+ /* We couldn't identify the frame as an existing frame, but
+ perhaps we can create one with a single argument. */
#ifdef SETUP_ARBITRARY_FRAME
- return SETUP_ARBITRARY_FRAME (numargs, args);
+ return SETUP_ARBITRARY_FRAME (numargs, addrs);
#else
- /* Usual case. Do it here rather than have everyone supply
- a SETUP_ARBITRARY_FRAME that does this. */
- if (numargs == 1)
- return create_new_frame (args[0], 0);
- error ("Too many args in frame specification");
+ /* Usual case. Do it here rather than have everyone supply a
+ SETUP_ARBITRARY_FRAME that does this. */
+ if (numargs == 1)
+ return create_new_frame (addrs[0], 0);
+ error ("Too many args in frame specification");
#endif
- /* NOTREACHED */
- }
- /* NOTREACHED */
+}
+
+struct frame_info *
+parse_frame_specification (char *frame_exp)
+{
+ return parse_frame_specification_1 (frame_exp, NULL, NULL);
}
/* Print verbosely the selected frame or the frame at address ADDR.
char *funname = 0;
enum language funlang = language_unknown;
const char *pc_regname;
+ int selected_frame_p;
- if (!target_has_stack)
- error ("No stack.");
+ fi = parse_frame_specification_1 (addr_exp, "No stack.", &selected_frame_p);
/* Name of the value returned by get_frame_pc(). Per comments, "pc"
is not a good name. */
get_frame_pc(). */
pc_regname = "pc";
- fi = parse_frame_specification (addr_exp);
- if (fi == NULL)
- error ("Invalid frame specified.");
-
find_frame_sal (fi, &sal);
func = get_frame_function (fi);
/* FIXME: cagney/2002-11-28: Why bother? Won't sal.symtab contain
}
calling_frame_info = get_prev_frame (fi);
- if (!addr_exp && frame_relative_level (deprecated_selected_frame) >= 0)
+ if (selected_frame_p && frame_relative_level (fi) >= 0)
{
printf_filtered ("Stack level %d, frame at ",
- frame_relative_level (deprecated_selected_frame));
+ frame_relative_level (fi));
print_address_numeric (get_frame_base (fi), 1, gdb_stdout);
printf_filtered (":\n");
}
void
select_frame_command (char *level_exp, int from_tty)
{
- struct frame_info *frame;
-
- if (!target_has_stack)
- error ("No stack.");
-
- frame = parse_frame_specification (level_exp);
-
- select_frame (frame);
+ select_frame (parse_frame_specification_1 (level_exp, "No stack.", NULL));
}
/* The "frame" command. With no arg, print selected frame briefly.
projects / binutils-gdb.git / commitdiff