/* Cache and manage frames for GDB, the GNU debugger.
Copyright 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000,
- 2001, 2002 Free Software Foundation, Inc.
+ 2001, 2002, 2003 Free Software Foundation, Inc.
This file is part of GDB.
#include "dummy-frame.h"
#include "gdbcore.h"
#include "annotate.h"
+#include "language.h"
-/* Return a frame uniq ID that can be used to, later re-find the
+/* Return a frame uniq ID that can be used to, later, re-find the
frame. */
-void
-get_frame_id (struct frame_info *fi, struct frame_id *id)
+struct frame_id
+get_frame_id (struct frame_info *fi)
{
if (fi == NULL)
{
- id->base = 0;
- id->pc = 0;
+ return null_frame_id;
}
else
{
- id->base = FRAME_FP (fi);
- id->pc = fi->pc;
+ struct frame_id id;
+ id.base = fi->frame;
+ id.pc = fi->pc;
+ return id;
}
}
+const struct frame_id null_frame_id; /* All zeros. */
+
+struct frame_id
+frame_id_build (CORE_ADDR base, CORE_ADDR func_or_pc)
+{
+ struct frame_id id;
+ id.base = base;
+ id.pc = func_or_pc;
+ return id;
+}
+
+int
+frame_id_p (struct frame_id l)
+{
+ /* The .func can be NULL but the .base cannot. */
+ return (l.base != 0);
+}
+
+int
+frame_id_eq (struct frame_id l, struct frame_id r)
+{
+ /* If .base is different, the frames are different. */
+ if (l.base != r.base)
+ return 0;
+ /* Add a test to check that the frame ID's are for the same function
+ here. */
+ return 1;
+}
+
+int
+frame_id_inner (struct frame_id l, struct frame_id r)
+{
+ /* Only return non-zero when strictly inner than. Note that, per
+ comment in "frame.h", there is some fuzz here. Frameless
+ functions are not strictly inner than (same .base but different
+ .func). */
+ return INNER_THAN (l.base, r.base);
+}
+
struct frame_info *
frame_find_by_id (struct frame_id id)
{
/* ZERO denotes the null frame, let the caller decide what to do
about it. Should it instead return get_current_frame()? */
- if (id.base == 0 && id.pc == 0)
+ if (!frame_id_p (id))
return NULL;
for (frame = get_current_frame ();
frame != NULL;
frame = get_prev_frame (frame))
{
- if (INNER_THAN (FRAME_FP (frame), id.base))
- /* ``inner/current < frame < id.base''. Keep looking along
- the frame chain. */
- continue;
- if (INNER_THAN (id.base, FRAME_FP (frame)))
- /* ``inner/current < id.base < frame''. Oops, gone past it.
- Just give up. */
+ struct frame_id this = get_frame_id (frame);
+ if (frame_id_eq (id, this))
+ /* An exact match. */
+ return frame;
+ if (frame_id_inner (id, this))
+ /* Gone to far. */
return NULL;
- /* FIXME: cagney/2002-04-21: This isn't sufficient. It should
- use id.pc to check that the two frames belong to the same
- function. Otherwise we'll do things like match dummy frames
- or mis-match frameless functions. However, until someone
- notices, stick with the existing behavour. */
- return frame;
+ /* Either, we're not yet gone far enough out along the frame
+ chain (inner(this,id), or we're comparing frameless functions
+ (same .base, different .func, no test available). Struggle
+ on until we've definitly gone to far. */
}
return NULL;
}
return frame->pc_unwind_cache;
}
+struct frame_id
+frame_id_unwind (struct frame_info *frame)
+{
+ if (!frame->id_unwind_cache_p)
+ {
+ frame->id_unwind_cache =
+ frame->id_unwind (frame, &frame->unwind_cache);
+ frame->id_unwind_cache_p = 1;
+ }
+ return frame->id_unwind_cache;
+}
+
+
void
frame_register_unwind (struct frame_info *frame, int regnum,
int *optimizedp, enum lval_type *lvalp,
static struct obstack frame_cache_obstack;
void *
-frame_obstack_alloc (unsigned long size)
+frame_obstack_zalloc (unsigned long size)
{
- return obstack_alloc (&frame_cache_obstack, size);
+ void *data = obstack_alloc (&frame_cache_obstack, size);
+ memset (data, 0, size);
+ return data;
}
-void
+CORE_ADDR *
frame_saved_regs_zalloc (struct frame_info *fi)
{
fi->saved_regs = (CORE_ADDR *)
- frame_obstack_alloc (SIZEOF_FRAME_SAVED_REGS);
- memset (fi->saved_regs, 0, SIZEOF_FRAME_SAVED_REGS);
+ frame_obstack_zalloc (SIZEOF_FRAME_SAVED_REGS);
+ return fi->saved_regs;
}
+CORE_ADDR *
+get_frame_saved_regs (struct frame_info *fi)
+{
+ return fi->saved_regs;
+}
/* Return the innermost (currently executing) stack frame. */
return current_frame;
}
+/* The "selected" stack frame is used by default for local and arg
+ access. May be zero, for no selected frame. */
+
+struct frame_info *deprecated_selected_frame;
+
+/* Return the selected frame. Always non-null (unless there isn't an
+ inferior sufficient for creating a frame) in which case an error is
+ thrown. */
+
+struct frame_info *
+get_selected_frame (void)
+{
+ if (deprecated_selected_frame == NULL)
+ /* Hey! Don't trust this. It should really be re-finding the
+ last selected frame of the currently selected thread. This,
+ though, is better than nothing. */
+ select_frame (get_current_frame ());
+ /* There is always a frame. */
+ gdb_assert (deprecated_selected_frame != NULL);
+ return deprecated_selected_frame;
+}
+
+/* Select frame FI (or NULL - to invalidate the current frame). */
+
void
-set_current_frame (struct frame_info *frame)
+select_frame (struct frame_info *fi)
{
- current_frame = frame;
+ register struct symtab *s;
+
+ deprecated_selected_frame = fi;
+ /* NOTE: cagney/2002-05-04: FI can be NULL. This occures when the
+ frame is being invalidated. */
+ if (selected_frame_level_changed_hook)
+ selected_frame_level_changed_hook (frame_relative_level (fi));
+
+ /* FIXME: kseitz/2002-08-28: It would be nice to call
+ selected_frame_level_changed_event right here, but due to limitations
+ in the current interfaces, we would end up flooding UIs with events
+ because select_frame is used extensively internally.
+
+ Once we have frame-parameterized frame (and frame-related) commands,
+ the event notification can be moved here, since this function will only
+ be called when the users selected frame is being changed. */
+
+ /* Ensure that symbols for this frame are read in. Also, determine the
+ source language of this frame, and switch to it if desired. */
+ if (fi)
+ {
+ s = find_pc_symtab (fi->pc);
+ if (s
+ && s->language != current_language->la_language
+ && s->language != language_unknown
+ && language_mode == language_mode_auto)
+ {
+ set_language (s->language);
+ }
+ }
}
/* Return the register saved in the simplistic ``saved_regs'' cache.
/* If we're using generic dummy frames, we'd better not be in a call
dummy. (generic_call_dummy_register_unwind ought to have been called
instead.) */
- gdb_assert (!(USE_GENERIC_DUMMY_FRAMES
+ gdb_assert (!(DEPRECATED_USE_GENERIC_DUMMY_FRAMES
&& (get_frame_type (frame) == DUMMY_FRAME)));
+ /* Only (older) architectures that implement the
+ FRAME_INIT_SAVED_REGS method should be using this function. */
+ gdb_assert (FRAME_INIT_SAVED_REGS_P ());
+
/* Load the saved_regs register cache. */
if (frame->saved_regs == NULL)
FRAME_INIT_SAVED_REGS (frame);
{
int sizeof_cache = ((NUM_REGS + NUM_PSEUDO_REGS)
* sizeof (void *));
- regs = frame_obstack_alloc (sizeof_cache);
- memset (regs, 0, sizeof_cache);
+ regs = frame_obstack_zalloc (sizeof_cache);
(*cache) = regs;
}
if (regs[regnum] == NULL)
{
regs[regnum]
- = frame_obstack_alloc (REGISTER_RAW_SIZE (regnum));
+ = frame_obstack_zalloc (REGISTER_RAW_SIZE (regnum));
read_memory (frame->saved_regs[regnum], regs[regnum],
REGISTER_RAW_SIZE (regnum));
}
return FRAME_SAVED_PC (frame);
}
+static struct frame_id
+frame_saved_regs_id_unwind (struct frame_info *next_frame, void **cache)
+{
+ int fromleaf;
+ struct frame_id id;
+
+ if (next_frame->next == NULL)
+ /* FIXME: 2002-11-09: Frameless functions can occure anywhere in
+ the frame chain, not just the inner most frame! The generic,
+ per-architecture, frame code should handle this and the below
+ should simply be removed. */
+ fromleaf = FRAMELESS_FUNCTION_INVOCATION (next_frame);
+ else
+ fromleaf = 0;
+
+ if (fromleaf)
+ /* A frameless inner-most frame. The `FP' (which isn't an
+ architecture frame-pointer register!) of the caller is the same
+ as the callee. */
+ /* FIXME: 2002-11-09: There isn't any reason to special case this
+ edge condition. Instead the per-architecture code should hande
+ it locally. */
+ id.base = get_frame_base (next_frame);
+ else
+ {
+ /* Two macros defined in tm.h specify the machine-dependent
+ actions to be performed here.
+
+ First, get the frame's chain-pointer.
+
+ If that is zero, the frame is the outermost frame or a leaf
+ called by the outermost frame. This means that if start
+ calls main without a frame, we'll return 0 (which is fine
+ anyway).
+
+ Nope; there's a problem. This also returns when the current
+ routine is a leaf of main. This is unacceptable. We move
+ this to after the ffi test; I'd rather have backtraces from
+ start go curfluy than have an abort called from main not show
+ main. */
+ id.base = FRAME_CHAIN (next_frame);
+
+ if (!frame_chain_valid (id.base, next_frame))
+ return null_frame_id;
+ }
+ if (id.base == 0)
+ return null_frame_id;
+
+ /* FIXME: cagney/2002-06-08: This should probably return the frame's
+ function and not the PC (a.k.a. resume address). */
+ id.pc = frame_pc_unwind (next_frame);
+ return id;
+}
+
/* Function: get_saved_register
Find register number REGNUM relative to FRAME and put its (raw,
target format) contents in *RAW_BUFFER.
if (!target_has_registers)
error ("No registers.");
+ gdb_assert (FRAME_INIT_SAVED_REGS_P ());
+
/* Normal systems don't optimize out things with register numbers. */
if (optimized != NULL)
*optimized = 0;
static void
set_unwind_by_pc (CORE_ADDR pc, CORE_ADDR fp,
frame_register_unwind_ftype **unwind_register,
- frame_pc_unwind_ftype **unwind_pc)
+ frame_pc_unwind_ftype **unwind_pc,
+ frame_id_unwind_ftype **unwind_id)
{
- if (!USE_GENERIC_DUMMY_FRAMES)
+ if (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES)
{
/* Still need to set this to something. The ``info frame'' code
calls this function to find out where the saved registers are.
return vaguely correct values.. */
*unwind_register = frame_saved_regs_register_unwind;
*unwind_pc = frame_saved_regs_pc_unwind;
+ *unwind_id = frame_saved_regs_id_unwind;
}
- else if (pc_in_dummy_frame (pc))
+ else if (DEPRECATED_PC_IN_CALL_DUMMY_P ()
+ ? DEPRECATED_PC_IN_CALL_DUMMY (pc, 0, 0)
+ : pc_in_dummy_frame (pc))
{
*unwind_register = dummy_frame_register_unwind;
*unwind_pc = dummy_frame_pc_unwind;
+ *unwind_id = dummy_frame_id_unwind;
}
else
{
*unwind_register = frame_saved_regs_register_unwind;
*unwind_pc = frame_saved_regs_pc_unwind;
+ *unwind_id = frame_saved_regs_id_unwind;
}
}
struct frame_info *fi;
enum frame_type type;
- fi = (struct frame_info *)
- obstack_alloc (&frame_cache_obstack,
- sizeof (struct frame_info));
-
- /* Zero all fields by default. */
- memset (fi, 0, sizeof (struct frame_info));
+ fi = frame_obstack_zalloc (sizeof (struct frame_info));
fi->frame = addr;
fi->pc = pc;
has previously set it. This is really somewhat bogus. The
initialization, as seen in create_new_frame(), should occur
before the INIT function has been called. */
- if (USE_GENERIC_DUMMY_FRAMES && pc_in_dummy_frame (pc))
+ if (DEPRECATED_USE_GENERIC_DUMMY_FRAMES
+ && (DEPRECATED_PC_IN_CALL_DUMMY_P ()
+ ? DEPRECATED_PC_IN_CALL_DUMMY (pc, 0, 0)
+ : pc_in_dummy_frame (pc)))
/* NOTE: cagney/2002-11-11: Does this even occure? */
type = DUMMY_FRAME;
else
/* Select/initialize an unwind function. */
set_unwind_by_pc (fi->pc, fi->frame, &fi->register_unwind,
- &fi->pc_unwind);
+ &fi->pc_unwind, &fi->id_unwind);
return fi;
}
/* FIXME: 2002-11-09: There isn't any reason to special case this
edge condition. Instead the per-architecture code should hande
it locally. */
- address = FRAME_FP (next_frame);
+ address = get_frame_base (next_frame);
else
{
/* Two macros defined in tm.h specify the machine-dependent
main. */
address = FRAME_CHAIN (next_frame);
- /* FIXME: cagney/2002-06-08: There should be two tests here.
- The first would check for a valid frame chain based on a user
- selectable policy. The default being ``stop at main'' (as
- implemented by generic_func_frame_chain_valid()). Other
- policies would be available - stop at NULL, .... The second
- test, if provided by the target architecture, would check for
- more exotic cases - most target architectures wouldn't bother
- with this second case. */
- if (!FRAME_CHAIN_VALID (address, next_frame))
+ if (!frame_chain_valid (address, next_frame))
return 0;
}
if (address == 0)
return 0;
/* Create an initially zero previous frame. */
- prev = (struct frame_info *)
- obstack_alloc (&frame_cache_obstack,
- sizeof (struct frame_info));
- memset (prev, 0, sizeof (struct frame_info));
+ prev = frame_obstack_zalloc (sizeof (struct frame_info));
/* Link it in. */
next_frame->prev = prev;
prev->type = NORMAL_FRAME;
/* This change should not be needed, FIXME! We should determine
- whether any targets *need* INIT_FRAME_PC to happen after
- INIT_EXTRA_FRAME_INFO and come up with a simple way to express
- what goes on here.
+ whether any targets *need* DEPRECATED_INIT_FRAME_PC to happen
+ after INIT_EXTRA_FRAME_INFO and come up with a simple way to
+ express what goes on here.
INIT_EXTRA_FRAME_INFO is called from two places: create_new_frame
(where the PC is already set up) and here (where it isn't).
- INIT_FRAME_PC is only called from here, always after
+ DEPRECATED_INIT_FRAME_PC is only called from here, always after
INIT_EXTRA_FRAME_INFO.
The catch is the MIPS, where INIT_EXTRA_FRAME_INFO requires the
PC value (which hasn't been set yet). Some other machines appear
to require INIT_EXTRA_FRAME_INFO before they can do
- INIT_FRAME_PC. Phoo.
+ DEPRECATED_INIT_FRAME_PC. Phoo.
- We shouldn't need INIT_FRAME_PC_FIRST to add more complication to
- an already overcomplicated part of GDB. gnu@cygnus.com, 15Sep92.
+ We shouldn't need DEPRECATED_INIT_FRAME_PC_FIRST to add more
+ complication to an already overcomplicated part of GDB.
+ gnu@cygnus.com, 15Sep92.
- Assuming that some machines need INIT_FRAME_PC after
+ Assuming that some machines need DEPRECATED_INIT_FRAME_PC after
INIT_EXTRA_FRAME_INFO, one possible scheme:
SETUP_INNERMOST_FRAME(): Default version is just create_new_frame
SETUP_ARBITRARY_FRAME would have to do that.
INIT_PREV_FRAME(fromleaf, prev) Replace INIT_EXTRA_FRAME_INFO and
- INIT_FRAME_PC. This should also return a flag saying whether to
- keep the new frame, or whether to discard it, because on some
- machines (e.g. mips) it is really awkward to have
+ DEPRECATED_INIT_FRAME_PC. This should also return a flag saying
+ whether to keep the new frame, or whether to discard it, because
+ on some machines (e.g. mips) it is really awkward to have
FRAME_CHAIN_VALID called *before* INIT_EXTRA_FRAME_INFO (there is
no good way to get information deduced in FRAME_CHAIN_VALID into
the extra fields of the new frame). std_frame_pc(fromleaf, prev)
This is the default setting for INIT_PREV_FRAME. It just does
- what the default INIT_FRAME_PC does. Some machines will call it
- from INIT_PREV_FRAME (either at the beginning, the end, or in the
- middle). Some machines won't use it.
+ what the default DEPRECATED_INIT_FRAME_PC does. Some machines
+ will call it from INIT_PREV_FRAME (either at the beginning, the
+ end, or in the middle). Some machines won't use it.
kingdon@cygnus.com, 13Apr93, 31Jan94, 14Dec94. */
FRAME_SAVED_PC() is being superseed by frame_pc_unwind() and that
function does have somewhere to cache that PC value. */
- INIT_FRAME_PC_FIRST (fromleaf, prev);
+ if (DEPRECATED_INIT_FRAME_PC_FIRST_P ())
+ prev->pc = (DEPRECATED_INIT_FRAME_PC_FIRST (fromleaf, prev));
if (INIT_EXTRA_FRAME_INFO_P ())
INIT_EXTRA_FRAME_INFO (fromleaf, prev);
/* This entry is in the frame queue now, which is good since
FRAME_SAVED_PC may use that queue to figure out its value (see
tm-sparc.h). We want the pc saved in the inferior frame. */
- INIT_FRAME_PC (fromleaf, prev);
+ if (DEPRECATED_INIT_FRAME_PC_P ())
+ prev->pc = DEPRECATED_INIT_FRAME_PC (fromleaf, prev);
/* If ->frame and ->pc are unchanged, we are in the process of
getting ourselves into an infinite backtrace. Some architectures
check things like the debug info at that point (dwarf2cfi?) and
use that to decide how the frame should be unwound. */
set_unwind_by_pc (prev->pc, prev->frame, &prev->register_unwind,
- &prev->pc_unwind);
+ &prev->pc_unwind, &prev->id_unwind);
/* NOTE: cagney/2002-11-18: The code segments, found in
create_new_frame and get_prev_frame(), that initializes the
has previously set it. This is really somewhat bogus. The
initialization, as seen in create_new_frame(), should occur
before the INIT function has been called. */
- if (USE_GENERIC_DUMMY_FRAMES
- && pc_in_dummy_frame (prev->pc))
+ if (DEPRECATED_USE_GENERIC_DUMMY_FRAMES
+ && (DEPRECATED_PC_IN_CALL_DUMMY_P ()
+ ? DEPRECATED_PC_IN_CALL_DUMMY (prev->pc, 0, 0)
+ : pc_in_dummy_frame (prev->pc)))
prev->type = DUMMY_FRAME;
else
{
return frame->pc;
}
+static int
+pc_notcurrent (struct frame_info *frame)
+{
+ /* If FRAME is not the innermost frame, that normally means that
+ FRAME->pc points at the return instruction (which is *after* the
+ call instruction), and we want to get the line containing the
+ call (because the call is where the user thinks the program is).
+ However, if the next frame is either a SIGTRAMP_FRAME or a
+ DUMMY_FRAME, then the next frame will contain a saved interrupt
+ PC and such a PC indicates the current (rather than next)
+ instruction/line, consequently, for such cases, want to get the
+ line containing fi->pc. */
+ struct frame_info *next = get_next_frame (frame);
+ int notcurrent = (next != NULL && get_frame_type (next) == NORMAL_FRAME);
+ return notcurrent;
+}
+
+void
+find_frame_sal (struct frame_info *frame, struct symtab_and_line *sal)
+{
+ (*sal) = find_pc_line (frame->pc, pc_notcurrent (frame));
+}
+
+/* Per "frame.h", return the ``address'' of the frame. Code should
+ really be using get_frame_id(). */
+CORE_ADDR
+get_frame_base (struct frame_info *fi)
+{
+ return fi->frame;
+}
+
/* Level of the selected frame: 0 for innermost, 1 for its caller, ...
or -1 for a NULL frame. */
{
/* Some targets still don't use [generic] dummy frames. Catch them
here. */
- if (!USE_GENERIC_DUMMY_FRAMES
+ if (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES
&& deprecated_frame_in_dummy (frame))
return DUMMY_FRAME;
return frame->type;
/* Find the addresses in which registers are saved in FRAME. */
void
-get_frame_saved_regs (struct frame_info *frame,
- struct frame_saved_regs *saved_regs_addr)
+deprecated_get_frame_saved_regs (struct frame_info *frame,
+ struct frame_saved_regs *saved_regs_addr)
{
if (frame->saved_regs == NULL)
{
frame->saved_regs = (CORE_ADDR *)
- frame_obstack_alloc (SIZEOF_FRAME_SAVED_REGS);
+ frame_obstack_zalloc (SIZEOF_FRAME_SAVED_REGS);
}
if (saved_regs_addr == NULL)
{
}
#endif
+struct frame_extra_info *
+get_frame_extra_info (struct frame_info *fi)
+{
+ return fi->extra_info;
+}
+
+struct frame_extra_info *
+frame_extra_info_zalloc (struct frame_info *fi, long size)
+{
+ fi->extra_info = frame_obstack_zalloc (size);
+ return fi->extra_info;
+}
+
+void
+deprecated_update_frame_pc_hack (struct frame_info *frame, CORE_ADDR pc)
+{
+ /* See comment in "frame.h". */
+ frame->pc = pc;
+}
+
+void
+deprecated_update_frame_base_hack (struct frame_info *frame, CORE_ADDR base)
+{
+ /* See comment in "frame.h". */
+ frame->frame = base;
+}
+
+void
+deprecated_set_frame_saved_regs_hack (struct frame_info *frame,
+ CORE_ADDR *saved_regs)
+{
+ frame->saved_regs = saved_regs;
+}
+
+void
+deprecated_set_frame_extra_info_hack (struct frame_info *frame,
+ struct frame_extra_info *extra_info)
+{
+ frame->extra_info = extra_info;
+}
+
+void
+deprecated_set_frame_next_hack (struct frame_info *fi,
+ struct frame_info *next)
+{
+ fi->next = next;
+}
+
+void
+deprecated_set_frame_prev_hack (struct frame_info *fi,
+ struct frame_info *prev)
+{
+ fi->prev = prev;
+}
+
+struct context *
+deprecated_get_frame_context (struct frame_info *fi)
+{
+ return fi->context;
+}
+
+void
+deprecated_set_frame_context (struct frame_info *fi,
+ struct context *context)
+{
+ fi->context = context;
+}
+
+struct frame_info *
+deprecated_frame_xmalloc (void)
+{
+ struct frame_info *frame = XMALLOC (struct frame_info);
+ memset (frame, 0, sizeof (struct frame_info));
+ return frame;
+}
+
+struct frame_info *
+deprecated_frame_xmalloc_with_cleanup (long sizeof_saved_regs,
+ long sizeof_extra_info)
+{
+ struct frame_info *frame = deprecated_frame_xmalloc ();
+ make_cleanup (xfree, frame);
+ if (sizeof_saved_regs > 0)
+ {
+ frame->saved_regs = xcalloc (1, sizeof_saved_regs);
+ make_cleanup (xfree, frame->saved_regs);
+ }
+ if (sizeof_extra_info > 0)
+ {
+ frame->extra_info = xcalloc (1, sizeof_extra_info);
+ make_cleanup (xfree, frame->extra_info);
+ }
+ return frame;
+}
+
void
_initialize_frame (void)
{
projects / deliverable / binutils-gdb.git / blobdiff