/* Perform an inferior function call, for GDB, the GNU debugger.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
- 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
- Foundation, Inc.
+ Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
+ 2008, 2009 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "breakpoint.h"
#include "block.h"
#include "gdbcore.h"
#include "language.h"
-#include "symfile.h"
+#include "objfiles.h"
#include "gdbcmd.h"
#include "command.h"
#include "gdb_string.h"
#include "infcall.h"
+#include "dummy-frame.h"
+#include "ada-lang.h"
+#include "gdbthread.h"
+#include "exceptions.h"
+
+/* If we can't find a function's name from its address,
+ we print this instead. */
+#define RAW_FUNCTION_ADDRESS_FORMAT "at 0x%s"
+#define RAW_FUNCTION_ADDRESS_SIZE (sizeof (RAW_FUNCTION_ADDRESS_FORMAT) \
+ + 2 * sizeof (CORE_ADDR))
/* NOTE: cagney/2003-04-16: What's the future of this code?
with "set coerce-float-to-double 0". */
static int coerce_float_to_double_p = 1;
+static void
+show_coerce_float_to_double_p (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file, _("\
+Coercion of floats to doubles when calling functions is %s.\n"),
+ value);
+}
/* This boolean tells what gdb should do if a signal is received while
in a function called from gdb (call dummy). If set, gdb unwinds
The default is to stop in the frame where the signal was received. */
int unwind_on_signal_p = 0;
+static void
+show_unwind_on_signal_p (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file, _("\
+Unwinding of stack if a signal is received while in a call dummy is %s.\n"),
+ value);
+}
+
+/* This boolean tells what gdb should do if a std::terminate call is
+ made while in a function called from gdb (call dummy).
+ As the confines of a single dummy stack prohibit out-of-frame
+ handlers from handling a raised exception, and as out-of-frame
+ handlers are common in C++, this can lead to no handler being found
+ by the unwinder, and a std::terminate call. This is a false positive.
+ If set, gdb unwinds the stack and restores the context to what it
+ was before the call.
+
+ The default is to unwind the frame if a std::terminate call is
+ made. */
+
+static int unwind_on_terminating_exception_p = 1;
+
+static void
+show_unwind_on_terminating_exception_p (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c,
+ const char *value)
+
+{
+ fprintf_filtered (file, _("\
+Unwind stack if a C++ exception is unhandled while in a call dummy is %s.\n"),
+ value);
+}
/* Perform the standard coercions that are specified
- for arguments to be passed to C functions.
+ for arguments to be passed to C or Ada functions.
If PARAM_TYPE is non-NULL, it is the expected parameter type.
- IS_PROTOTYPED is non-zero if the function declaration is prototyped. */
+ IS_PROTOTYPED is non-zero if the function declaration is prototyped.
+ SP is the stack pointer were additional data can be pushed (updating
+ its value as needed). */
static struct value *
-value_arg_coerce (struct value *arg, struct type *param_type,
- int is_prototyped)
+value_arg_coerce (struct gdbarch *gdbarch, struct value *arg,
+ struct type *param_type, int is_prototyped, CORE_ADDR *sp)
{
- register struct type *arg_type = check_typedef (VALUE_TYPE (arg));
- register struct type *type
+ const struct builtin_type *builtin = builtin_type (gdbarch);
+ struct type *arg_type = check_typedef (value_type (arg));
+ struct type *type
= param_type ? check_typedef (param_type) : arg_type;
+ /* Perform any Ada-specific coercion first. */
+ if (current_language->la_language == language_ada)
+ arg = ada_convert_actual (arg, type, gdbarch, sp);
+
+ /* Force the value to the target if we will need its address. At
+ this point, we could allocate arguments on the stack instead of
+ calling malloc if we knew that their addresses would not be
+ saved by the called function. */
+ arg = value_coerce_to_target (arg);
+
switch (TYPE_CODE (type))
{
case TYPE_CODE_REF:
- if (TYPE_CODE (arg_type) != TYPE_CODE_REF
- && TYPE_CODE (arg_type) != TYPE_CODE_PTR)
- {
- arg = value_addr (arg);
- VALUE_TYPE (arg) = param_type;
- return arg;
- }
- break;
+ {
+ struct value *new_value;
+
+ if (TYPE_CODE (arg_type) == TYPE_CODE_REF)
+ return value_cast_pointers (type, arg);
+
+ /* Cast the value to the reference's target type, and then
+ convert it back to a reference. This will issue an error
+ if the value was not previously in memory - in some cases
+ we should clearly be allowing this, but how? */
+ new_value = value_cast (TYPE_TARGET_TYPE (type), arg);
+ new_value = value_ref (new_value);
+ return new_value;
+ }
case TYPE_CODE_INT:
case TYPE_CODE_CHAR:
case TYPE_CODE_BOOL:
/* If we don't have a prototype, coerce to integer type if necessary. */
if (!is_prototyped)
{
- if (TYPE_LENGTH (type) < TYPE_LENGTH (builtin_type_int))
- type = builtin_type_int;
+ if (TYPE_LENGTH (type) < TYPE_LENGTH (builtin->builtin_int))
+ type = builtin->builtin_int;
}
/* Currently all target ABIs require at least the width of an integer
type for an argument. We may have to conditionalize the following
type coercion for future targets. */
- if (TYPE_LENGTH (type) < TYPE_LENGTH (builtin_type_int))
- type = builtin_type_int;
+ if (TYPE_LENGTH (type) < TYPE_LENGTH (builtin->builtin_int))
+ type = builtin->builtin_int;
break;
case TYPE_CODE_FLT:
if (!is_prototyped && coerce_float_to_double_p)
{
- if (TYPE_LENGTH (type) < TYPE_LENGTH (builtin_type_double))
- type = builtin_type_double;
- else if (TYPE_LENGTH (type) > TYPE_LENGTH (builtin_type_double))
- type = builtin_type_long_double;
+ if (TYPE_LENGTH (type) < TYPE_LENGTH (builtin->builtin_double))
+ type = builtin->builtin_double;
+ else if (TYPE_LENGTH (type) > TYPE_LENGTH (builtin->builtin_double))
+ type = builtin->builtin_long_double;
}
break;
case TYPE_CODE_FUNC:
case TYPE_CODE_STRING:
case TYPE_CODE_BITSTRING:
case TYPE_CODE_ERROR:
- case TYPE_CODE_MEMBER:
+ case TYPE_CODE_MEMBERPTR:
+ case TYPE_CODE_METHODPTR:
case TYPE_CODE_METHOD:
case TYPE_CODE_COMPLEX:
default:
CORE_ADDR
find_function_addr (struct value *function, struct type **retval_type)
{
- register struct type *ftype = check_typedef (VALUE_TYPE (function));
- register enum type_code code = TYPE_CODE (ftype);
- struct type *value_type;
+ struct type *ftype = check_typedef (value_type (function));
+ struct gdbarch *gdbarch = get_type_arch (ftype);
+ enum type_code code = TYPE_CODE (ftype);
+ struct type *value_type = NULL;
CORE_ADDR funaddr;
/* If it's a member function, just look at the function
/* Determine address to call. */
if (code == TYPE_CODE_FUNC || code == TYPE_CODE_METHOD)
{
- funaddr = VALUE_ADDRESS (function);
+ funaddr = value_address (function);
value_type = TYPE_TARGET_TYPE (ftype);
}
else if (code == TYPE_CODE_PTR)
if (TYPE_CODE (ftype) == TYPE_CODE_FUNC
|| TYPE_CODE (ftype) == TYPE_CODE_METHOD)
{
- funaddr = CONVERT_FROM_FUNC_PTR_ADDR (funaddr);
+ funaddr = gdbarch_convert_from_func_ptr_addr (gdbarch, funaddr,
+ ¤t_target);
value_type = TYPE_TARGET_TYPE (ftype);
}
- else
- value_type = builtin_type_int;
}
else if (code == TYPE_CODE_INT)
{
if (TYPE_LENGTH (ftype) == 1)
funaddr = value_as_address (value_addr (function));
else
- /* Handle integer used as address of a function. */
- funaddr = (CORE_ADDR) value_as_long (function);
-
- value_type = builtin_type_int;
+ {
+ /* Handle function descriptors lacking debug info. */
+ int found_descriptor = 0;
+ funaddr = 0; /* pacify "gcc -Werror" */
+ if (VALUE_LVAL (function) == lval_memory)
+ {
+ CORE_ADDR nfunaddr;
+ funaddr = value_as_address (value_addr (function));
+ nfunaddr = funaddr;
+ funaddr = gdbarch_convert_from_func_ptr_addr (gdbarch, funaddr,
+ ¤t_target);
+ if (funaddr != nfunaddr)
+ found_descriptor = 1;
+ }
+ if (!found_descriptor)
+ /* Handle integer used as address of a function. */
+ funaddr = (CORE_ADDR) value_as_long (function);
+ }
}
else
- error ("Invalid data type for function to be called.");
+ error (_("Invalid data type for function to be called."));
- *retval_type = value_type;
- return funaddr;
+ if (retval_type != NULL)
+ *retval_type = value_type;
+ return funaddr + gdbarch_deprecated_function_start_offset (gdbarch);
}
-/* Call breakpoint_auto_delete on the current contents of the bpstat
- pointed to by arg (which is really a bpstat *). */
+/* For CALL_DUMMY_ON_STACK, push a breakpoint sequence that the called
+ function returns to. */
-static void
-breakpoint_auto_delete_contents (void *arg)
+static CORE_ADDR
+push_dummy_code (struct gdbarch *gdbarch,
+ CORE_ADDR sp, CORE_ADDR funaddr,
+ struct value **args, int nargs,
+ struct type *value_type,
+ CORE_ADDR *real_pc, CORE_ADDR *bp_addr,
+ struct regcache *regcache)
{
- breakpoint_auto_delete (*(bpstat *) arg);
+ gdb_assert (gdbarch_push_dummy_code_p (gdbarch));
+
+ return gdbarch_push_dummy_code (gdbarch, sp, funaddr,
+ args, nargs, value_type, real_pc, bp_addr,
+ regcache);
}
-static CORE_ADDR
-legacy_push_dummy_code (struct gdbarch *gdbarch,
- CORE_ADDR sp, CORE_ADDR funaddr, int using_gcc,
- struct value **args, int nargs,
- struct type *value_type,
- CORE_ADDR *real_pc, CORE_ADDR *bp_addr)
+/* Fetch the name of the function at FUNADDR.
+ This is used in printing an error message for call_function_by_hand.
+ BUF is used to print FUNADDR in hex if the function name cannot be
+ determined. It must be large enough to hold formatted result of
+ RAW_FUNCTION_ADDRESS_FORMAT. */
+
+static const char *
+get_function_name (CORE_ADDR funaddr, char *buf, int buf_size)
{
- /* CALL_DUMMY is an array of words (DEPRECATED_REGISTER_SIZE), but
- each word is in host byte order. Before calling
- DEPRECATED_FIX_CALL_DUMMY, we byteswap it and remove any extra
- bytes which might exist because ULONGEST is bigger than
- DEPRECATED_REGISTER_SIZE. */
- /* NOTE: This is pretty wierd, as the call dummy is actually a
- sequence of instructions. But CISC machines will have to pack
- the instructions into DEPRECATED_REGISTER_SIZE units (and so will
- RISC machines for which INSTRUCTION_SIZE is not
- DEPRECATED_REGISTER_SIZE). */
- /* NOTE: This is pretty stupid. CALL_DUMMY should be in strict
- target byte order. */
- CORE_ADDR start_sp;
- ULONGEST *dummy = alloca (DEPRECATED_SIZEOF_CALL_DUMMY_WORDS);
- int sizeof_dummy1 = (DEPRECATED_REGISTER_SIZE
- * DEPRECATED_SIZEOF_CALL_DUMMY_WORDS
- / sizeof (ULONGEST));
- char *dummy1 = alloca (sizeof_dummy1);
- memcpy (dummy, DEPRECATED_CALL_DUMMY_WORDS,
- DEPRECATED_SIZEOF_CALL_DUMMY_WORDS);
- if (INNER_THAN (1, 2))
- {
- /* Stack grows down */
- sp -= sizeof_dummy1;
- start_sp = sp;
- }
- else
- {
- /* Stack grows up */
- start_sp = sp;
- sp += sizeof_dummy1;
- }
- /* NOTE: cagney/2002-09-10: Don't bother re-adjusting the stack
- after allocating space for the call dummy. A target can specify
- a SIZEOF_DUMMY1 (via DEPRECATED_SIZEOF_CALL_DUMMY_WORDS) such
- that all local alignment requirements are met. */
- /* Create a call sequence customized for this function and the
- number of arguments for it. */
{
- int i;
- for (i = 0; i < (int) (DEPRECATED_SIZEOF_CALL_DUMMY_WORDS / sizeof (dummy[0]));
- i++)
- store_unsigned_integer (&dummy1[i * DEPRECATED_REGISTER_SIZE],
- DEPRECATED_REGISTER_SIZE,
- (ULONGEST) dummy[i]);
+ struct symbol *symbol = find_pc_function (funaddr);
+ if (symbol)
+ return SYMBOL_PRINT_NAME (symbol);
+ }
+
+ {
+ /* Try the minimal symbols. */
+ struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (funaddr);
+ if (msymbol)
+ return SYMBOL_PRINT_NAME (msymbol);
+ }
+
+ {
+ char *tmp = xstrprintf (_(RAW_FUNCTION_ADDRESS_FORMAT),
+ hex_string (funaddr));
+ gdb_assert (strlen (tmp) + 1 <= buf_size);
+ strcpy (buf, tmp);
+ xfree (tmp);
+ return buf;
}
- /* NOTE: cagney/2003-04-22: This computation of REAL_PC, BP_ADDR and
- DUMMY_ADDR is pretty messed up. It comes from constant tinkering
- with the values. Instead a DEPRECATED_FIX_CALL_DUMMY replacement
- (PUSH_DUMMY_BREAKPOINT?) should just do everything. */
-#ifdef GDB_TARGET_IS_HPPA
- (*real_pc) = DEPRECATED_FIX_CALL_DUMMY (dummy1, start_sp, funaddr, nargs,
- args, value_type, using_gcc);
-#else
- if (DEPRECATED_FIX_CALL_DUMMY_P ())
- {
- /* gdb_assert (CALL_DUMMY_LOCATION == ON_STACK) true? */
- DEPRECATED_FIX_CALL_DUMMY (dummy1, start_sp, funaddr, nargs, args,
- value_type, using_gcc);
- }
- (*real_pc) = start_sp;
-#endif
- /* Yes, the offset is applied to the real_pc and not the dummy addr.
- Ulgh! Blame the HP/UX target. */
- (*bp_addr) = (*real_pc) + DEPRECATED_CALL_DUMMY_BREAKPOINT_OFFSET;
- /* Yes, the offset is applied to the real_pc and not the
- dummy_addr. Ulgh! Blame the HP/UX target. */
- (*real_pc) += DEPRECATED_CALL_DUMMY_START_OFFSET;
- write_memory (start_sp, (char *) dummy1, sizeof_dummy1);
- if (DEPRECATED_USE_GENERIC_DUMMY_FRAMES)
- generic_save_call_dummy_addr (start_sp, start_sp + sizeof_dummy1);
- return sp;
}
-static CORE_ADDR
-generic_push_dummy_code (struct gdbarch *gdbarch,
- CORE_ADDR sp, CORE_ADDR funaddr, int using_gcc,
- struct value **args, int nargs,
- struct type *value_type,
- CORE_ADDR *real_pc, CORE_ADDR *bp_addr)
+/* Subroutine of call_function_by_hand to simplify it.
+ Start up the inferior and wait for it to stop.
+ Return the exception if there's an error, or an exception with
+ reason >= 0 if there's no error.
+
+ This is done inside a TRY_CATCH so the caller needn't worry about
+ thrown errors. The caller should rethrow if there's an error. */
+
+static struct gdb_exception
+run_inferior_call (struct thread_info *call_thread, CORE_ADDR real_pc)
{
- /* Something here to findout the size of a breakpoint and then
- allocate space for it on the stack. */
- int bplen;
- /* This code assumes frame align. */
- gdb_assert (gdbarch_frame_align_p (gdbarch));
- /* Force the stack's alignment. The intent is to ensure that the SP
- is aligned to at least a breakpoint instruction's boundary. */
- sp = gdbarch_frame_align (gdbarch, sp);
- /* Allocate space for, and then position the breakpoint on the
- stack. */
- if (gdbarch_inner_than (gdbarch, 1, 2))
- {
- CORE_ADDR bppc = sp;
- gdbarch_breakpoint_from_pc (gdbarch, &bppc, &bplen);
- sp = gdbarch_frame_align (gdbarch, sp - bplen);
- (*bp_addr) = sp;
- /* Should the breakpoint size/location be re-computed here? */
- }
- else
+ volatile struct gdb_exception e;
+ int saved_async = 0;
+ int saved_in_infcall = call_thread->in_infcall;
+ ptid_t call_thread_ptid = call_thread->ptid;
+ char *saved_target_shortname = xstrdup (target_shortname);
+
+ call_thread->in_infcall = 1;
+
+ clear_proceed_status ();
+
+ disable_watchpoints_before_interactive_call_start ();
+ call_thread->proceed_to_finish = 1; /* We want stop_registers, please... */
+
+ if (target_can_async_p ())
+ saved_async = target_async_mask (0);
+
+ TRY_CATCH (e, RETURN_MASK_ALL)
+ proceed (real_pc, TARGET_SIGNAL_0, 0);
+
+ /* At this point the current thread may have changed. Refresh
+ CALL_THREAD as it could be invalid if its thread has exited. */
+ call_thread = find_thread_ptid (call_thread_ptid);
+
+ /* Don't restore the async mask if the target has changed,
+ saved_async is for the original target. */
+ if (saved_async
+ && strcmp (saved_target_shortname, target_shortname) == 0)
+ target_async_mask (saved_async);
+
+ enable_watchpoints_after_interactive_call_stop ();
+
+ /* Call breakpoint_auto_delete on the current contents of the bpstat
+ of inferior call thread.
+ If all error()s out of proceed ended up calling normal_stop
+ (and perhaps they should; it already does in the special case
+ of error out of resume()), then we wouldn't need this. */
+ if (e.reason < 0)
{
- (*bp_addr) = sp;
- gdbarch_breakpoint_from_pc (gdbarch, bp_addr, &bplen);
- sp = gdbarch_frame_align (gdbarch, sp + bplen);
+ if (call_thread != NULL)
+ breakpoint_auto_delete (call_thread->stop_bpstat);
}
- /* Inferior resumes at the function entry point. */
- (*real_pc) = funaddr;
- return sp;
-}
-/* Provide backward compatibility. Once DEPRECATED_FIX_CALL_DUMMY is
- eliminated, this can be simplified. */
+ if (call_thread != NULL)
+ call_thread->in_infcall = saved_in_infcall;
-static CORE_ADDR
-push_dummy_code (struct gdbarch *gdbarch,
- CORE_ADDR sp, CORE_ADDR funaddr, int using_gcc,
- struct value **args, int nargs,
- struct type *value_type,
- CORE_ADDR *real_pc, CORE_ADDR *bp_addr)
-{
- if (gdbarch_push_dummy_code_p (gdbarch))
- return gdbarch_push_dummy_code (gdbarch, sp, funaddr, using_gcc,
- args, nargs, value_type, real_pc, bp_addr);
- else if (DEPRECATED_FIX_CALL_DUMMY_P ())
- return legacy_push_dummy_code (gdbarch, sp, funaddr, using_gcc,
- args, nargs, value_type, real_pc, bp_addr);
- else
- return generic_push_dummy_code (gdbarch, sp, funaddr, using_gcc,
- args, nargs, value_type, real_pc, bp_addr);
+ xfree (saved_target_shortname);
+
+ return e;
}
/* All this stuff with a dummy frame may seem unnecessarily complicated
struct value *
call_function_by_hand (struct value *function, int nargs, struct value **args)
{
- register CORE_ADDR sp;
- CORE_ADDR dummy_addr;
- struct type *value_type;
- unsigned char struct_return;
+ CORE_ADDR sp;
+ struct type *values_type, *target_values_type;
+ unsigned char struct_return = 0, lang_struct_return = 0;
CORE_ADDR struct_addr = 0;
- struct regcache *retbuf;
- struct cleanup *retbuf_cleanup;
struct inferior_status *inf_status;
struct cleanup *inf_status_cleanup;
+ struct inferior_thread_state *caller_state;
+ struct cleanup *caller_state_cleanup;
CORE_ADDR funaddr;
- int using_gcc; /* Set to version of gcc in use, or zero if not gcc */
CORE_ADDR real_pc;
- struct type *ftype = check_typedef (SYMBOL_TYPE (function));
+ struct type *ftype = check_typedef (value_type (function));
CORE_ADDR bp_addr;
+ struct frame_id dummy_id;
+ struct cleanup *args_cleanup;
+ struct frame_info *frame;
+ struct gdbarch *gdbarch;
+ struct breakpoint *terminate_bp = NULL;
+ struct minimal_symbol *tm;
+ ptid_t call_thread_ptid;
+ struct gdb_exception e;
+ const char *name;
+ char name_buf[RAW_FUNCTION_ADDRESS_SIZE];
+
+ if (TYPE_CODE (ftype) == TYPE_CODE_PTR)
+ ftype = check_typedef (TYPE_TARGET_TYPE (ftype));
if (!target_has_execution)
noprocess ();
- /* Create a cleanup chain that contains the retbuf (buffer
- containing the register values). This chain is create BEFORE the
- inf_status chain so that the inferior status can cleaned up
- (restored or discarded) without having the retbuf freed. */
- retbuf = regcache_xmalloc (current_gdbarch);
- retbuf_cleanup = make_cleanup_regcache_xfree (retbuf);
-
- /* A cleanup for the inferior status. Create this AFTER the retbuf
- so that this can be discarded or applied without interfering with
- the regbuf. */
- inf_status = save_inferior_status (1);
+ frame = get_current_frame ();
+ gdbarch = get_frame_arch (frame);
+
+ if (!gdbarch_push_dummy_call_p (gdbarch))
+ error (_("This target does not support function calls."));
+
+ /* A cleanup for the inferior status.
+ This is only needed while we're preparing the inferior function call. */
+ inf_status = save_inferior_status ();
inf_status_cleanup = make_cleanup_restore_inferior_status (inf_status);
- if (DEPRECATED_PUSH_DUMMY_FRAME_P ())
- {
- /* DEPRECATED_PUSH_DUMMY_FRAME is responsible for saving the
- inferior registers (and frame_pop() for restoring them). (At
- least on most machines) they are saved on the stack in the
- inferior. */
- DEPRECATED_PUSH_DUMMY_FRAME;
- }
- else
- {
- /* FIXME: cagney/2003-02-26: Step zero of this little tinker is
- to extract the generic dummy frame code from the architecture
- vector. Hence this direct call.
-
- A follow-on change is to modify this interface so that it takes
- thread OR frame OR ptid as a parameter, and returns a dummy
- frame handle. The handle can then be used further down as a
- parameter to generic_save_dummy_frame_tos(). Hmm, thinking
- about it, since everything is ment to be using generic dummy
- frames, why not even use some of the dummy frame code to here -
- do a regcache dup and then pass the duped regcache, along with
- all the other stuff, at one single point.
-
- In fact, you can even save the structure's return address in the
- dummy frame and fix one of those nasty lost struct return edge
- conditions. */
- generic_push_dummy_frame ();
- }
+ /* Save the caller's registers and other state associated with the
+ inferior itself so that they can be restored once the
+ callee returns. To allow nested calls the registers are (further
+ down) pushed onto a dummy frame stack. Include a cleanup (which
+ is tossed once the regcache has been pushed). */
+ caller_state = save_inferior_thread_state ();
+ caller_state_cleanup = make_cleanup_restore_inferior_thread_state (caller_state);
/* Ensure that the initial SP is correctly aligned. */
{
- CORE_ADDR old_sp = read_sp ();
- if (gdbarch_frame_align_p (current_gdbarch))
+ CORE_ADDR old_sp = get_frame_sp (frame);
+ if (gdbarch_frame_align_p (gdbarch))
{
+ sp = gdbarch_frame_align (gdbarch, old_sp);
+ /* NOTE: cagney/2003-08-13: Skip the "red zone". For some
+ ABIs, a function can use memory beyond the inner most stack
+ address. AMD64 called that region the "red zone". Skip at
+ least the "red zone" size before allocating any space on
+ the stack. */
+ if (gdbarch_inner_than (gdbarch, 1, 2))
+ sp -= gdbarch_frame_red_zone_size (gdbarch);
+ else
+ sp += gdbarch_frame_red_zone_size (gdbarch);
+ /* Still aligned? */
+ gdb_assert (sp == gdbarch_frame_align (gdbarch, sp));
/* NOTE: cagney/2002-09-18:
On a RISC architecture, a void parameterless generic dummy
stack. That way, two dummy frames can never be identical.
It does burn a few bytes of stack but that is a small price
to pay :-). */
- sp = gdbarch_frame_align (current_gdbarch, old_sp);
if (sp == old_sp)
{
- if (INNER_THAN (1, 2))
+ if (gdbarch_inner_than (gdbarch, 1, 2))
/* Stack grows down. */
- sp = gdbarch_frame_align (current_gdbarch, old_sp - 1);
+ sp = gdbarch_frame_align (gdbarch, old_sp - 1);
else
/* Stack grows up. */
- sp = gdbarch_frame_align (current_gdbarch, old_sp + 1);
+ sp = gdbarch_frame_align (gdbarch, old_sp + 1);
}
- gdb_assert ((INNER_THAN (1, 2) && sp <= old_sp)
- || (INNER_THAN (2, 1) && sp >= old_sp));
+ gdb_assert ((gdbarch_inner_than (gdbarch, 1, 2)
+ && sp <= old_sp)
+ || (gdbarch_inner_than (gdbarch, 2, 1)
+ && sp >= old_sp));
}
else
/* FIXME: cagney/2002-09-18: Hey, you loose!
- Who knows how badly aligned the SP is! Further, per comment
- above, if the generic dummy frame ends up empty (because
- nothing is pushed) GDB won't be able to correctly perform
- back traces. If a target is having trouble with backtraces,
- first thing to do is add FRAME_ALIGN() to the architecture
- vector. If that fails, try unwind_dummy_id(). */
+ Who knows how badly aligned the SP is!
+
+ If the generic dummy frame ends up empty (because nothing is
+ pushed) GDB won't be able to correctly perform back traces.
+ If a target is having trouble with backtraces, first thing to
+ do is add FRAME_ALIGN() to the architecture vector. If that
+ fails, try dummy_id().
+
+ If the ABI specifies a "Red Zone" (see the doco) the code
+ below will quietly trash it. */
sp = old_sp;
}
- funaddr = find_function_addr (function, &value_type);
- CHECK_TYPEDEF (value_type);
+ funaddr = find_function_addr (function, &values_type);
+ if (!values_type)
+ values_type = builtin_type (gdbarch)->builtin_int;
- {
- struct block *b = block_for_pc (funaddr);
- /* If compiled without -g, assume GCC 2. */
- using_gcc = (b == NULL ? 2 : BLOCK_GCC_COMPILED (b));
- }
+ CHECK_TYPEDEF (values_type);
- /* Are we returning a value using a structure return or a normal
- value return? */
+ /* Are we returning a value using a structure return (passing a
+ hidden argument pointing to storage) or a normal value return?
+ There are two cases: language-mandated structure return and
+ target ABI structure return. The variable STRUCT_RETURN only
+ describes the latter. The language version is handled by passing
+ the return location as the first parameter to the function,
+ even preceding "this". This is different from the target
+ ABI version, which is target-specific; for instance, on ia64
+ the first argument is passed in out0 but the hidden structure
+ return pointer would normally be passed in r8. */
- struct_return = using_struct_return (function, funaddr, value_type,
- using_gcc);
+ if (language_pass_by_reference (values_type))
+ {
+ lang_struct_return = 1;
+
+ /* Tell the target specific argument pushing routine not to
+ expect a value. */
+ target_values_type = builtin_type (gdbarch)->builtin_void;
+ }
+ else
+ {
+ struct_return = using_struct_return (gdbarch,
+ value_type (function), values_type);
+ target_values_type = values_type;
+ }
/* Determine the location of the breakpoint (and possibly other
stuff) that the called function will return to. The SPARC, for a
/* The actual breakpoint (at BP_ADDR) is inserted separatly so there
is no need to write that out. */
- switch (CALL_DUMMY_LOCATION)
+ switch (gdbarch_call_dummy_location (gdbarch))
{
case ON_STACK:
- /* "dummy_addr" is here just to keep old targets happy. New
- targets return that same information via "sp" and "bp_addr". */
- if (INNER_THAN (1, 2))
- {
- sp = push_dummy_code (current_gdbarch, sp, funaddr,
- using_gcc, args, nargs, value_type,
- &real_pc, &bp_addr);
- dummy_addr = sp;
- }
- else
- {
- dummy_addr = sp;
- sp = push_dummy_code (current_gdbarch, sp, funaddr,
- using_gcc, args, nargs, value_type,
- &real_pc, &bp_addr);
- }
+ sp = push_dummy_code (gdbarch, sp, funaddr,
+ args, nargs, target_values_type,
+ &real_pc, &bp_addr, get_current_regcache ());
break;
case AT_ENTRY_POINT:
- if (DEPRECATED_FIX_CALL_DUMMY_P ())
- {
- /* Sigh. Some targets use DEPRECATED_FIX_CALL_DUMMY to
- shove extra stuff onto the stack or into registers. That
- code should be in PUSH_DUMMY_CALL, however, in the mean
- time ... */
- /* If the target is manipulating DUMMY1, it looses big time. */
- void *dummy1 = NULL;
- DEPRECATED_FIX_CALL_DUMMY (dummy1, sp, funaddr, nargs, args,
- value_type, using_gcc);
- }
- real_pc = funaddr;
- dummy_addr = CALL_DUMMY_ADDRESS ();
- /* A call dummy always consists of just a single breakpoint, so
- it's address is the same as the address of the dummy. */
- bp_addr = dummy_addr;
- break;
+ {
+ CORE_ADDR dummy_addr;
+
+ real_pc = funaddr;
+ dummy_addr = entry_point_address ();
+ /* Make certain that the address points at real code, and not a
+ function descriptor. */
+ dummy_addr = gdbarch_convert_from_func_ptr_addr (gdbarch,
+ dummy_addr,
+ ¤t_target);
+ /* A call dummy always consists of just a single breakpoint, so
+ its address is the same as the address of the dummy. */
+ bp_addr = dummy_addr;
+ break;
+ }
case AT_SYMBOL:
/* Some executables define a symbol __CALL_DUMMY_ADDRESS whose
address is the location where the breakpoint should be
this can be deleted - ON_STACK is a better option. */
{
struct minimal_symbol *sym;
+ CORE_ADDR dummy_addr;
sym = lookup_minimal_symbol ("__CALL_DUMMY_ADDRESS", NULL, NULL);
real_pc = funaddr;
dummy_addr = SYMBOL_VALUE_ADDRESS (sym);
else
dummy_addr = entry_point_address ();
+ /* Make certain that the address points at real code, and not
+ a function descriptor. */
+ dummy_addr = gdbarch_convert_from_func_ptr_addr (gdbarch,
+ dummy_addr,
+ ¤t_target);
+ /* A call dummy always consists of just a single breakpoint,
+ so it's address is the same as the address of the dummy. */
bp_addr = dummy_addr;
break;
}
default:
- internal_error (__FILE__, __LINE__, "bad switch");
+ internal_error (__FILE__, __LINE__, _("bad switch"));
}
- if (DEPRECATED_USE_GENERIC_DUMMY_FRAMES)
- /* Save where the breakpoint is going to be inserted so that the
- dummy-frame code is later able to re-identify it. */
- generic_save_call_dummy_addr (bp_addr, bp_addr + 1);
-
if (nargs < TYPE_NFIELDS (ftype))
- error ("too few arguments in function call");
+ error (_("Too few arguments in function call."));
{
int i;
param_type = TYPE_FIELD_TYPE (ftype, i);
else
param_type = NULL;
-
- args[i] = value_arg_coerce (args[i], param_type, prototyped);
-
- /* elz: this code is to handle the case in which the function
- to be called has a pointer to function as parameter and the
- corresponding actual argument is the address of a function
- and not a pointer to function variable. In aCC compiled
- code, the calls through pointers to functions (in the body
- of the function called by hand) are made via
- $$dyncall_external which requires some registers setting,
- this is taken care of if we call via a function pointer
- variable, but not via a function address. In cc this is
- not a problem. */
-
- if (using_gcc == 0)
- {
- if (param_type != NULL && TYPE_CODE (ftype) != TYPE_CODE_METHOD)
- {
- /* if this parameter is a pointer to function. */
- if (TYPE_CODE (param_type) == TYPE_CODE_PTR)
- if (TYPE_CODE (TYPE_TARGET_TYPE (param_type)) == TYPE_CODE_FUNC)
- /* elz: FIXME here should go the test about the
- compiler used to compile the target. We want to
- issue the error message only if the compiler
- used was HP's aCC. If we used HP's cc, then
- there is no problem and no need to return at
- this point. */
- /* Go see if the actual parameter is a variable of
- type pointer to function or just a function. */
- if (args[i]->lval == not_lval)
- {
- char *arg_name;
- if (find_pc_partial_function ((CORE_ADDR) args[i]->aligner.contents[0], &arg_name, NULL, NULL))
- error ("\
-You cannot use function <%s> as argument. \n\
-You must use a pointer to function type variable. Command ignored.", arg_name);
- }
- }
- }
- }
- }
- if (REG_STRUCT_HAS_ADDR_P ())
- {
- int i;
- /* This is a machine like the sparc, where we may need to pass a
- pointer to the structure, not the structure itself. */
- for (i = nargs - 1; i >= 0; i--)
- {
- struct type *arg_type = check_typedef (VALUE_TYPE (args[i]));
- if ((TYPE_CODE (arg_type) == TYPE_CODE_STRUCT
- || TYPE_CODE (arg_type) == TYPE_CODE_UNION
- || TYPE_CODE (arg_type) == TYPE_CODE_ARRAY
- || TYPE_CODE (arg_type) == TYPE_CODE_STRING
- || TYPE_CODE (arg_type) == TYPE_CODE_BITSTRING
- || TYPE_CODE (arg_type) == TYPE_CODE_SET
- || (TYPE_CODE (arg_type) == TYPE_CODE_FLT
- && TYPE_LENGTH (arg_type) > 8)
- )
- && REG_STRUCT_HAS_ADDR (using_gcc, arg_type))
- {
- CORE_ADDR addr;
- int len; /* = TYPE_LENGTH (arg_type); */
- int aligned_len;
- arg_type = check_typedef (VALUE_ENCLOSING_TYPE (args[i]));
- len = TYPE_LENGTH (arg_type);
-
- if (STACK_ALIGN_P ())
- /* MVS 11/22/96: I think at least some of this
- stack_align code is really broken. Better to let
- PUSH_ARGUMENTS adjust the stack in a target-defined
- manner. */
- aligned_len = STACK_ALIGN (len);
- else
- aligned_len = len;
- if (INNER_THAN (1, 2))
- {
- /* stack grows downward */
- sp -= aligned_len;
- /* ... so the address of the thing we push is the
- stack pointer after we push it. */
- addr = sp;
- }
- else
- {
- /* The stack grows up, so the address of the thing
- we push is the stack pointer before we push it. */
- addr = sp;
- sp += aligned_len;
- }
- /* Push the structure. */
- write_memory (addr, VALUE_CONTENTS_ALL (args[i]), len);
- /* The value we're going to pass is the address of the
- thing we just pushed. */
- /*args[i] = value_from_longest (lookup_pointer_type (value_type),
- (LONGEST) addr); */
- args[i] = value_from_pointer (lookup_pointer_type (arg_type),
- addr);
- }
- }
- }
+ args[i] = value_arg_coerce (gdbarch, args[i],
+ param_type, prototyped, &sp);
+ if (param_type != NULL && language_pass_by_reference (param_type))
+ args[i] = value_addr (args[i]);
+ }
+ }
/* Reserve space for the return structure to be written on the
stack, if necessary. Make certain that the value is correctly
aligned. */
- if (struct_return)
+ if (struct_return || lang_struct_return)
{
- int len = TYPE_LENGTH (value_type);
- if (STACK_ALIGN_P ())
- /* NOTE: cagney/2003-03-22: Should rely on frame align, rather
- than stack align to force the alignment of the stack. */
- len = STACK_ALIGN (len);
- if (INNER_THAN (1, 2))
+ int len = TYPE_LENGTH (values_type);
+ if (gdbarch_inner_than (gdbarch, 1, 2))
{
/* Stack grows downward. Align STRUCT_ADDR and SP after
making space for the return value. */
sp -= len;
- if (gdbarch_frame_align_p (current_gdbarch))
- sp = gdbarch_frame_align (current_gdbarch, sp);
+ if (gdbarch_frame_align_p (gdbarch))
+ sp = gdbarch_frame_align (gdbarch, sp);
struct_addr = sp;
}
else
{
/* Stack grows upward. Align the frame, allocate space, and
then again, re-align the frame??? */
- if (gdbarch_frame_align_p (current_gdbarch))
- sp = gdbarch_frame_align (current_gdbarch, sp);
+ if (gdbarch_frame_align_p (gdbarch))
+ sp = gdbarch_frame_align (gdbarch, sp);
struct_addr = sp;
sp += len;
- if (gdbarch_frame_align_p (current_gdbarch))
- sp = gdbarch_frame_align (current_gdbarch, sp);
+ if (gdbarch_frame_align_p (gdbarch))
+ sp = gdbarch_frame_align (gdbarch, sp);
}
}
- /* elz: on HPPA no need for this extra alignment, maybe it is needed
- on other architectures. This is because all the alignment is
- taken care of in the above code (ifdef REG_STRUCT_HAS_ADDR) and
- in hppa_push_arguments */
- /* NOTE: cagney/2003-03-24: The below code is very broken. Given an
- odd sized parameter the below will mis-align the stack. As was
- suggested back in '96, better to let PUSH_ARGUMENTS handle it. */
- if (DEPRECATED_EXTRA_STACK_ALIGNMENT_NEEDED)
+ if (lang_struct_return)
{
- /* MVS 11/22/96: I think at least some of this stack_align code
- is really broken. Better to let push_dummy_call() adjust the
- stack in a target-defined manner. */
- if (STACK_ALIGN_P () && INNER_THAN (1, 2))
- {
- /* If stack grows down, we must leave a hole at the top. */
- int len = 0;
- int i;
- for (i = nargs - 1; i >= 0; i--)
- len += TYPE_LENGTH (VALUE_ENCLOSING_TYPE (args[i]));
- if (DEPRECATED_CALL_DUMMY_STACK_ADJUST_P ())
- len += DEPRECATED_CALL_DUMMY_STACK_ADJUST;
- sp -= STACK_ALIGN (len) - len;
- }
+ struct value **new_args;
+
+ /* Add the new argument to the front of the argument list. */
+ new_args = xmalloc (sizeof (struct value *) * (nargs + 1));
+ new_args[0] = value_from_pointer (lookup_pointer_type (values_type),
+ struct_addr);
+ memcpy (&new_args[1], &args[0], sizeof (struct value *) * nargs);
+ args = new_args;
+ nargs++;
+ args_cleanup = make_cleanup (xfree, args);
}
+ else
+ args_cleanup = make_cleanup (null_cleanup, NULL);
/* Create the dummy stack frame. Pass in the call dummy address as,
presumably, the ABI code knows where, in the call dummy, the
return address should be pointed. */
- if (gdbarch_push_dummy_call_p (current_gdbarch))
- /* When there is no push_dummy_call method, should this code
- simply error out. That would the implementation of this method
- for all ABIs (which is probably a good thing). */
- sp = gdbarch_push_dummy_call (current_gdbarch, funaddr, current_regcache,
- bp_addr, nargs, args, sp, struct_return,
- struct_addr);
- else if (DEPRECATED_PUSH_ARGUMENTS_P ())
- /* Keep old targets working. */
- sp = DEPRECATED_PUSH_ARGUMENTS (nargs, args, sp, struct_return,
- struct_addr);
- else
- sp = legacy_push_arguments (nargs, args, sp, struct_return, struct_addr);
-
- if (DEPRECATED_PUSH_RETURN_ADDRESS_P ())
- /* for targets that use no CALL_DUMMY */
- /* There are a number of targets now which actually don't write
- any CALL_DUMMY instructions into the target, but instead just
- save the machine state, push the arguments, and jump directly
- to the callee function. Since this doesn't actually involve
- executing a JSR/BSR instruction, the return address must be set
- up by hand, either by pushing onto the stack or copying into a
- return-address register as appropriate. Formerly this has been
- done in PUSH_ARGUMENTS, but that's overloading its
- functionality a bit, so I'm making it explicit to do it here. */
- /* NOTE: cagney/2003-04-22: The first parameter ("real_pc") has
- been replaced with zero, it turns out that no implementation
- used that parameter. This occured because the value being
- supplied - the address of the called function's entry point
- instead of the address of the breakpoint that the called
- function should return to - wasn't useful. */
- sp = DEPRECATED_PUSH_RETURN_ADDRESS (0, sp);
-
- /* NOTE: cagney/2003-03-23: Diable this code when there is a
- push_dummy_call() method. Since that method will have already
- handled any alignment issues, the code below is entirely
- redundant. */
- if (!gdbarch_push_dummy_call_p (current_gdbarch)
- && STACK_ALIGN_P () && !INNER_THAN (1, 2))
- {
- /* If stack grows up, we must leave a hole at the bottom, note
- that sp already has been advanced for the arguments! */
- if (DEPRECATED_CALL_DUMMY_STACK_ADJUST_P ())
- sp += DEPRECATED_CALL_DUMMY_STACK_ADJUST;
- sp = STACK_ALIGN (sp);
- }
+ sp = gdbarch_push_dummy_call (gdbarch, function, get_current_regcache (),
+ bp_addr, nargs, args,
+ sp, struct_return, struct_addr);
-/* XXX This seems wrong. For stacks that grow down we shouldn't do
- anything here! */
- /* MVS 11/22/96: I think at least some of this stack_align code is
- really broken. Better to let PUSH_ARGUMENTS adjust the stack in
- a target-defined manner. */
- if (DEPRECATED_CALL_DUMMY_STACK_ADJUST_P ())
- if (INNER_THAN (1, 2))
- {
- /* stack grows downward */
- sp -= DEPRECATED_CALL_DUMMY_STACK_ADJUST;
- }
+ do_cleanups (args_cleanup);
- /* Store the address at which the structure is supposed to be
- written. */
- /* NOTE: 2003-03-24: Since PUSH_ARGUMENTS can (and typically does)
- store the struct return address, this call is entirely redundant. */
- if (struct_return && DEPRECATED_STORE_STRUCT_RETURN_P ())
- DEPRECATED_STORE_STRUCT_RETURN (struct_addr, sp);
-
- /* Write the stack pointer. This is here because the statements
- above might fool with it. On SPARC, this write also stores the
- register window into the right place in the new stack frame,
- which otherwise wouldn't happen (see store_inferior_registers in
- sparc-nat.c). */
- /* NOTE: cagney/2003-03-23: Since the architecture method
- push_dummy_call() should have already stored the stack pointer
- (as part of creating the fake call frame), and none of the code
- following that call adjusts the stack-pointer value, the below
- call is entirely redundant. */
- if (DEPRECATED_DUMMY_WRITE_SP_P ())
- DEPRECATED_DUMMY_WRITE_SP (sp);
-
- if (gdbarch_unwind_dummy_id_p (current_gdbarch))
- {
- /* Sanity. The exact same SP value is returned by
- PUSH_DUMMY_CALL, saved as the dummy-frame TOS, and used by
- unwind_dummy_id to form the frame ID's stack address. */
- gdb_assert (DEPRECATED_USE_GENERIC_DUMMY_FRAMES);
- generic_save_dummy_frame_tos (sp);
- }
- else if (DEPRECATED_SAVE_DUMMY_FRAME_TOS_P ())
- DEPRECATED_SAVE_DUMMY_FRAME_TOS (sp);
+ /* Set up a frame ID for the dummy frame so we can pass it to
+ set_momentary_breakpoint. We need to give the breakpoint a frame
+ ID so that the breakpoint code can correctly re-identify the
+ dummy breakpoint. */
+ /* Sanity. The exact same SP value is returned by PUSH_DUMMY_CALL,
+ saved as the dummy-frame TOS, and used by dummy_id to form
+ the frame ID's stack address. */
+ dummy_id = frame_id_build (sp, bp_addr);
- /* Now proceed, having reached the desired place. */
- clear_proceed_status ();
-
/* Create a momentary breakpoint at the return address of the
inferior. That way it breaks when it returns. */
{
struct breakpoint *bpt;
struct symtab_and_line sal;
- struct frame_id frame;
init_sal (&sal); /* initialize to zeroes */
sal.pc = bp_addr;
sal.section = find_pc_overlay (sal.pc);
- /* Set up a frame ID for the dummy frame so we can pass it to
- set_momentary_breakpoint. We need to give the breakpoint a
- frame ID so that the breakpoint code can correctly re-identify
- the dummy breakpoint. */
- if (gdbarch_unwind_dummy_id_p (current_gdbarch))
- {
- /* Sanity. The exact same SP value is returned by
- PUSH_DUMMY_CALL, saved as the dummy-frame TOS, and used by
- unwind_dummy_id to form the frame ID's stack address. */
- gdb_assert (DEPRECATED_USE_GENERIC_DUMMY_FRAMES);
- frame = frame_id_build (sp, sal.pc);
- }
- else
- {
- /* The assumption here is that push_dummy_call() returned the
- stack part of the frame ID. Unfortunatly, many older
- architectures were, via a convoluted mess, relying on the
- poorly defined and greatly overloaded
- DEPRECATED_TARGET_READ_FP or DEPRECATED_FP_REGNUM to supply
- the value. */
- if (DEPRECATED_TARGET_READ_FP_P ())
- frame = frame_id_build (DEPRECATED_TARGET_READ_FP (), sal.pc);
- else if (DEPRECATED_FP_REGNUM >= 0)
- frame = frame_id_build (read_register (DEPRECATED_FP_REGNUM), sal.pc);
- else
- frame = frame_id_build (sp, sal.pc);
- }
- bpt = set_momentary_breakpoint (sal, frame, bp_call_dummy);
+ /* Sanity. The exact same SP value is returned by
+ PUSH_DUMMY_CALL, saved as the dummy-frame TOS, and used by
+ dummy_id to form the frame ID's stack address. */
+ bpt = set_momentary_breakpoint (sal, dummy_id, bp_call_dummy);
bpt->disposition = disp_del;
}
- /* Execute a "stack dummy", a piece of code stored in the stack by
- the debugger to be executed in the inferior.
-
- The dummy's frame is automatically popped whenever that break is
- hit. If that is the first time the program stops,
- call_function_by_hand returns to its caller with that frame
- already gone and sets RC to 0.
-
- Otherwise, set RC to a non-zero value. If the called function
- receives a random signal, we do not allow the user to continue
- executing it as this may not work. The dummy frame is poped and
- we return 1. If we hit a breakpoint, we leave the frame in place
- and return 2 (the frame will eventually be popped when we do hit
- the dummy end breakpoint). */
+ /* Create a breakpoint in std::terminate.
+ If a C++ exception is raised in the dummy-frame, and the
+ exception handler is (normally, and expected to be) out-of-frame,
+ the default C++ handler will (wrongly) be called in an inferior
+ function call. This is wrong, as an exception can be normally
+ and legally handled out-of-frame. The confines of the dummy frame
+ prevent the unwinder from finding the correct handler (or any
+ handler, unless it is in-frame). The default handler calls
+ std::terminate. This will kill the inferior. Assert that
+ terminate should never be called in an inferior function
+ call. Place a momentary breakpoint in the std::terminate function
+ and if triggered in the call, rewind. */
+ if (unwind_on_terminating_exception_p)
+ {
+ struct minimal_symbol *tm = lookup_minimal_symbol ("std::terminate()",
+ NULL, NULL);
+ if (tm != NULL)
+ terminate_bp = set_momentary_breakpoint_at_pc
+ (SYMBOL_VALUE_ADDRESS (tm), bp_breakpoint);
+ }
+
+ /* Everything's ready, push all the info needed to restore the
+ caller (and identify the dummy-frame) onto the dummy-frame
+ stack. */
+ dummy_frame_push (caller_state, &dummy_id);
+
+ /* Discard both inf_status and caller_state cleanups.
+ From this point on we explicitly restore the associated state
+ or discard it. */
+ discard_cleanups (inf_status_cleanup);
+ /* Register a clean-up for unwind_on_terminating_exception_breakpoint. */
+ if (terminate_bp)
+ make_cleanup_delete_breakpoint (terminate_bp);
+
+ /* - SNIP - SNIP - SNIP - SNIP - SNIP - SNIP - SNIP - SNIP - SNIP -
+ If you're looking to implement asynchronous dummy-frames, then
+ just below is the place to chop this function in two.. */
+
+ /* TP is invalid after run_inferior_call returns, so enclose this
+ in a block so that it's only in scope during the time it's valid. */
{
- struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0);
- int saved_async = 0;
+ struct thread_info *tp = inferior_thread ();
- /* If all error()s out of proceed ended up calling normal_stop
- (and perhaps they should; it already does in the special case
- of error out of resume()), then we wouldn't need this. */
- make_cleanup (breakpoint_auto_delete_contents, &stop_bpstat);
+ /* Save this thread's ptid, we need it later but the thread
+ may have exited. */
+ call_thread_ptid = tp->ptid;
- disable_watchpoints_before_interactive_call_start ();
- proceed_to_finish = 1; /* We want stop_registers, please... */
+ /* Run the inferior until it stops. */
- if (target_can_async_p ())
- saved_async = target_async_mask (0);
-
- proceed (real_pc, TARGET_SIGNAL_0, 0);
-
- if (saved_async)
- target_async_mask (saved_async);
-
- enable_watchpoints_after_interactive_call_stop ();
-
- discard_cleanups (old_cleanups);
+ e = run_inferior_call (tp, real_pc);
}
- if (stopped_by_random_signal || !stop_stack_dummy)
+ /* Rethrow an error if we got one trying to run the inferior. */
+
+ if (e.reason < 0)
{
- /* Find the name of the function we're about to complain about. */
- char *name = NULL;
- {
- struct symbol *symbol = find_pc_function (funaddr);
- if (symbol)
- name = SYMBOL_PRINT_NAME (symbol);
- else
- {
- /* Try the minimal symbols. */
- struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (funaddr);
- if (msymbol)
- name = SYMBOL_PRINT_NAME (msymbol);
- }
- }
- if (name == NULL)
+ const char *name = get_function_name (funaddr,
+ name_buf, sizeof (name_buf));
+
+ discard_inferior_status (inf_status);
+
+ /* We could discard the dummy frame here if the program exited,
+ but it will get garbage collected the next time the program is
+ run anyway. */
+
+ switch (e.reason)
{
- /* NOTE: cagney/2003-04-23: Don't blame me. This code dates
- back to 1993-07-08, I simply moved it. */
- char format[80];
- sprintf (format, "at %s", local_hex_format ());
- name = alloca (80);
- /* FIXME-32x64: assumes funaddr fits in a long. */
- sprintf (name, format, (unsigned long) funaddr);
+ case RETURN_ERROR:
+ throw_error (e.error, _("\
+%s\n\
+An error occurred while in a function called from GDB.\n\
+Evaluation of the expression containing the function\n\
+(%s) will be abandoned.\n\
+When the function is done executing, GDB will silently stop."),
+ e.message, name);
+ case RETURN_QUIT:
+ default:
+ throw_exception (e);
}
+ }
+
+ /* If the program has exited, or we stopped at a different thread,
+ exit and inform the user. */
+
+ if (! target_has_execution)
+ {
+ const char *name = get_function_name (funaddr,
+ name_buf, sizeof (name_buf));
+
+ /* If we try to restore the inferior status,
+ we'll crash as the inferior is no longer running. */
+ discard_inferior_status (inf_status);
+
+ /* We could discard the dummy frame here given that the program exited,
+ but it will get garbage collected the next time the program is
+ run anyway. */
+
+ error (_("\
+The program being debugged exited while in a function called from GDB.\n\
+Evaluation of the expression containing the function\n\
+(%s) will be abandoned."),
+ name);
+ }
+
+ if (! ptid_equal (call_thread_ptid, inferior_ptid))
+ {
+ const char *name = get_function_name (funaddr,
+ name_buf, sizeof (name_buf));
+
+ /* We've switched threads. This can happen if another thread gets a
+ signal or breakpoint while our thread was running.
+ There's no point in restoring the inferior status,
+ we're in a different thread. */
+ discard_inferior_status (inf_status);
+ /* Keep the dummy frame record, if the user switches back to the
+ thread with the hand-call, we'll need it. */
+ if (stopped_by_random_signal)
+ error (_("\
+The program received a signal in another thread while\n\
+making a function call from GDB.\n\
+Evaluation of the expression containing the function\n\
+(%s) will be abandoned.\n\
+When the function is done executing, GDB will silently stop."),
+ name);
+ else
+ error (_("\
+The program stopped in another thread while making a function call from GDB.\n\
+Evaluation of the expression containing the function\n\
+(%s) will be abandoned.\n\
+When the function is done executing, GDB will silently stop."),
+ name);
+ }
+
+ if (stopped_by_random_signal || !stop_stack_dummy)
+ {
+ const char *name = get_function_name (funaddr,
+ name_buf, sizeof (name_buf));
+
if (stopped_by_random_signal)
{
/* We stopped inside the FUNCTION because of a random
/* The user wants the context restored. */
/* We must get back to the frame we were before the
- dummy call. */
- frame_pop (get_current_frame ());
+ dummy call. */
+ dummy_frame_pop (dummy_id);
+
+ /* We also need to restore inferior status to that before the
+ dummy call. */
+ restore_inferior_status (inf_status);
/* FIXME: Insert a bunch of wrap_here; name can be very
long if it's a C++ name with arguments and stuff. */
- error ("\
+ error (_("\
The program being debugged was signaled while in a function called from GDB.\n\
GDB has restored the context to what it was before the call.\n\
-To change this behavior use \"set unwindonsignal off\"\n\
-Evaluation of the expression containing the function (%s) will be abandoned.",
+To change this behavior use \"set unwindonsignal off\".\n\
+Evaluation of the expression containing the function\n\
+(%s) will be abandoned."),
name);
}
else
{
/* The user wants to stay in the frame where we stopped
- (default).*/
- /* If we restored the inferior status (via the cleanup),
- we would print a spurious error message (Unable to
- restore previously selected frame), would write the
- registers from the inf_status (which is wrong), and
- would do other wrong things. */
- discard_cleanups (inf_status_cleanup);
+ (default).
+ Discard inferior status, we're not at the same point
+ we started at. */
discard_inferior_status (inf_status);
+
/* FIXME: Insert a bunch of wrap_here; name can be very
long if it's a C++ name with arguments and stuff. */
- error ("\
+ error (_("\
The program being debugged was signaled while in a function called from GDB.\n\
GDB remains in the frame where the signal was received.\n\
-To change this behavior use \"set unwindonsignal on\"\n\
-Evaluation of the expression containing the function (%s) will be abandoned.",
+To change this behavior use \"set unwindonsignal on\".\n\
+Evaluation of the expression containing the function\n\
+(%s) will be abandoned.\n\
+When the function is done executing, GDB will silently stop."),
name);
}
}
if (!stop_stack_dummy)
{
- /* We hit a breakpoint inside the FUNCTION. */
- /* If we restored the inferior status (via the cleanup), we
- would print a spurious error message (Unable to restore
- previously selected frame), would write the registers
- from the inf_status (which is wrong), and would do other
- wrong things. */
- discard_cleanups (inf_status_cleanup);
+
+ /* Check if unwind on terminating exception behaviour is on. */
+ if (unwind_on_terminating_exception_p)
+ {
+ /* Check that the breakpoint is our special std::terminate
+ breakpoint. If it is, we do not want to kill the inferior
+ in an inferior function call. Rewind, and warn the
+ user. */
+
+ if (terminate_bp != NULL
+ && (inferior_thread()->stop_bpstat->breakpoint_at->address
+ == terminate_bp->loc->address))
+ {
+ /* We must get back to the frame we were before the
+ dummy call. */
+ dummy_frame_pop (dummy_id);
+
+ /* We also need to restore inferior status to that before the
+ dummy call. */
+ restore_inferior_status (inf_status);
+
+ error (_("\
+The program being debugged entered a std::terminate call, most likely\n\
+caused by an unhandled C++ exception. GDB blocked this call in order\n\
+to prevent the program from being terminated, and has restored the\n\
+context to its original state before the call.\n\
+To change this behaviour use \"set unwind-on-terminating-exception off\".\n\
+Evaluation of the expression containing the function (%s)\n\
+will be abandoned."),
+ name);
+ }
+ }
+ /* We hit a breakpoint inside the FUNCTION.
+ Keep the dummy frame, the user may want to examine its state.
+ Discard inferior status, we're not at the same point
+ we started at. */
discard_inferior_status (inf_status);
+
/* The following error message used to say "The expression
which contained the function call has been discarded."
It is a hard concept to explain in a few words. Ideally,
someday this will be implemented (it would not be easy). */
/* FIXME: Insert a bunch of wrap_here; name can be very long if it's
a C++ name with arguments and stuff. */
- error ("\
+ error (_("\
The program being debugged stopped while in a function called from GDB.\n\
-When the function (%s) is done executing, GDB will silently\n\
-stop (instead of continuing to evaluate the expression containing\n\
-the function call).", name);
+Evaluation of the expression containing the function\n\
+(%s) will be abandoned.\n\
+When the function is done executing, GDB will silently stop."),
+ name);
}
/* The above code errors out, so ... */
- internal_error (__FILE__, __LINE__, "... should not be here");
+ internal_error (__FILE__, __LINE__, _("... should not be here"));
}
- /* If we get here the called FUNCTION run to completion. */
-
- /* On normal return, the stack dummy has been popped already. */
- regcache_cpy_no_passthrough (retbuf, stop_registers);
-
- /* Restore the inferior status, via its cleanup. At this stage,
- leave the RETBUF alone. */
- do_cleanups (inf_status_cleanup);
-
- /* Figure out the value returned by the function. */
- /* elz: I defined this new macro for the hppa architecture only.
- this gives us a way to get the value returned by the function
- from the stack, at the same address we told the function to put
- it. We cannot assume on the pa that r28 still contains the
- address of the returned structure. Usually this will be
- overwritten by the callee. I don't know about other
- architectures, so I defined this macro */
-#ifdef VALUE_RETURNED_FROM_STACK
- if (struct_return)
- {
- do_cleanups (retbuf_cleanup);
- return VALUE_RETURNED_FROM_STACK (value_type, struct_addr);
- }
-#endif
- /* NOTE: cagney/2002-09-10: Only when the stack has been correctly
- aligned (using frame_align()) do we can trust STRUCT_ADDR and
- fetch the return value direct from the stack. This lack of trust
- comes about because legacy targets have a nasty habit of
- silently, and local to PUSH_ARGUMENTS(), moving STRUCT_ADDR. For
- such targets, just hope that value_being_returned() can find the
- adjusted value. */
- if (struct_return && gdbarch_frame_align_p (current_gdbarch))
- {
- struct value *retval = value_at (value_type, struct_addr, NULL);
- do_cleanups (retbuf_cleanup);
- return retval;
- }
- else
- {
- struct value *retval = value_being_returned (value_type, retbuf,
- struct_return);
- do_cleanups (retbuf_cleanup);
- return retval;
- }
+ /* If we get here the called FUNCTION ran to completion,
+ and the dummy frame has already been popped. */
+
+ {
+ struct regcache *retbuf = regcache_xmalloc (gdbarch);
+ struct cleanup *retbuf_cleanup = make_cleanup_regcache_xfree (retbuf);
+ struct value *retval = NULL;
+
+ regcache_cpy_no_passthrough (retbuf, stop_registers);
+
+ /* Inferior call is successful. Restore the inferior status.
+ At this stage, leave the RETBUF alone. */
+ restore_inferior_status (inf_status);
+
+ /* Figure out the value returned by the function. */
+
+ if (lang_struct_return)
+ retval = value_at (values_type, struct_addr);
+ else if (TYPE_CODE (target_values_type) == TYPE_CODE_VOID)
+ {
+ /* If the function returns void, don't bother fetching the
+ return value. */
+ retval = allocate_value (values_type);
+ }
+ else
+ {
+ switch (gdbarch_return_value (gdbarch, value_type (function),
+ target_values_type, NULL, NULL, NULL))
+ {
+ case RETURN_VALUE_REGISTER_CONVENTION:
+ case RETURN_VALUE_ABI_RETURNS_ADDRESS:
+ case RETURN_VALUE_ABI_PRESERVES_ADDRESS:
+ retval = allocate_value (values_type);
+ gdbarch_return_value (gdbarch, value_type (function), values_type,
+ retbuf, value_contents_raw (retval), NULL);
+ break;
+ case RETURN_VALUE_STRUCT_CONVENTION:
+ retval = value_at (values_type, struct_addr);
+ break;
+ }
+ }
+
+ do_cleanups (retbuf_cleanup);
+
+ gdb_assert (retval);
+ return retval;
+ }
}
+\f
+/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_infcall (void);
void
_initialize_infcall (void)
{
add_setshow_boolean_cmd ("coerce-float-to-double", class_obscure,
- &coerce_float_to_double_p, "\
-Set coercion of floats to doubles when calling functions\n\
+ &coerce_float_to_double_p, _("\
+Set coercion of floats to doubles when calling functions."), _("\
+Show coercion of floats to doubles when calling functions"), _("\
Variables of type float should generally be converted to doubles before\n\
calling an unprototyped function, and left alone when calling a prototyped\n\
function. However, some older debug info formats do not provide enough\n\
information to determine that a function is prototyped. If this flag is\n\
set, GDB will perform the conversion for a function it considers\n\
unprototyped.\n\
-The default is to perform the conversion.\n", "\
-Show coercion of floats to doubles when calling functions\n\
-Variables of type float should generally be converted to doubles before\n\
-calling an unprototyped function, and left alone when calling a prototyped\n\
-function. However, some older debug info formats do not provide enough\n\
-information to determine that a function is prototyped. If this flag is\n\
-set, GDB will perform the conversion for a function it considers\n\
-unprototyped.\n\
-The default is to perform the conversion.\n",
- NULL, NULL, &setlist, &showlist);
+The default is to perform the conversion.\n"),
+ NULL,
+ show_coerce_float_to_double_p,
+ &setlist, &showlist);
add_setshow_boolean_cmd ("unwindonsignal", no_class,
- &unwind_on_signal_p, "\
-Set unwinding of stack if a signal is received while in a call dummy.\n\
-The unwindonsignal lets the user determine what gdb should do if a signal\n\
-is received while in a function called from gdb (call dummy). If set, gdb\n\
-unwinds the stack and restore the context to what as it was before the call.\n\
-The default is to stop in the frame where the signal was received.", "\
-Set unwinding of stack if a signal is received while in a call dummy.\n\
+ &unwind_on_signal_p, _("\
+Set unwinding of stack if a signal is received while in a call dummy."), _("\
+Show unwinding of stack if a signal is received while in a call dummy."), _("\
The unwindonsignal lets the user determine what gdb should do if a signal\n\
is received while in a function called from gdb (call dummy). If set, gdb\n\
unwinds the stack and restore the context to what as it was before the call.\n\
-The default is to stop in the frame where the signal was received.",
- NULL, NULL, &setlist, &showlist);
+The default is to stop in the frame where the signal was received."),
+ NULL,
+ show_unwind_on_signal_p,
+ &setlist, &showlist);
+
+ add_setshow_boolean_cmd ("unwind-on-terminating-exception", no_class,
+ &unwind_on_terminating_exception_p, _("\
+Set unwinding of stack if std::terminate is called while in call dummy."), _("\
+Show unwinding of stack if std::terminate() is called while in a call dummy."), _("\
+The unwind on terminating exception flag lets the user determine\n\
+what gdb should do if a std::terminate() call is made from the\n\
+default exception handler. If set, gdb unwinds the stack and restores\n\
+the context to what it was before the call. If unset, gdb allows the\n\
+std::terminate call to proceed.\n\
+The default is to unwind the frame."),
+ NULL,
+ show_unwind_on_terminating_exception_p,
+ &setlist, &showlist);
+
}
projects / deliverable / binutils-gdb.git / blobdiff