void
simulator_command (char *args, int from_tty)
{
if (gdbsim_desc == NULL)
{
/* PREVIOUSLY: The user may give a command before the simulator
is opened. [...] (??? assuming of course one wishes to
continue to allow commands to be sent to unopened simulators,
which isn't entirely unreasonable). */
/* The simulator is a builtin abstraction of a remote target.
Consistent with that model, access to the simulator, via sim
commands, is restricted to the period when the channel to the
simulator is open. */
error ("Not connected to the simulator target");
}
sim_do_command (gdbsim_desc, args);
/* Invalidate the register cache, in case the simulator command does
something funny. */
registers_changed ();
}
static void
spu_multiarch_deactivate (void)
{
unpush_target (&spu_ops);
/* Make sure the thread architecture is re-evaluated. */
registers_changed ();
}
void
core_target::detach (inferior *inf, int from_tty)
{
/* Note that 'this' is dangling after this call. unpush_target
closes the target, and our close implementation deletes
'this'. */
unpush_target (this);
/* Clear the register cache and the frame cache. */
registers_changed ();
reinit_frame_cache ();
maybe_say_no_core_file_now (from_tty);
}
static void
spu_multiarch_activate (void)
{
/* If GDB was configured without SPU architecture support,
we cannot install SPU multi-architecture support either. */
if (spu_gdbarch (-1) == NULL)
return;
push_target (&spu_ops);
/* Make sure the thread architecture is re-evaluated. */
registers_changed ();
}
/* Generic prepare_to_proceed(). This one should be suitable for most
targets that support threads. */
int
generic_prepare_to_proceed (int select_it)
{
ptid_t wait_ptid;
struct target_waitstatus wait_status;
/* Get the last target status returned by target_wait(). */
get_last_target_status (&wait_ptid, &wait_status);
/* Make sure we were stopped either at a breakpoint, or because
of a Ctrl-C. */
if (wait_status.kind != TARGET_WAITKIND_STOPPED
|| (wait_status.value.sig != TARGET_SIGNAL_TRAP &&
wait_status.value.sig != TARGET_SIGNAL_INT))
{
return 0;
}
if (!ptid_equal (wait_ptid, minus_one_ptid)
&& !ptid_equal (inferior_ptid, wait_ptid))
{
/* Switched over from WAIT_PID. */
CORE_ADDR wait_pc = read_pc_pid (wait_ptid);
if (wait_pc != read_pc ())
{
if (select_it)
{
/* Switch back to WAIT_PID thread. */
inferior_ptid = wait_ptid;
/* FIXME: This stuff came from switch_to_thread() in
thread.c (which should probably be a public function). */
flush_cached_frames ();
registers_changed ();
stop_pc = wait_pc;
select_frame (get_current_frame ());
}
/* We return 1 to indicate that there is a breakpoint here,
so we need to step over it before continuing to avoid
hitting it straight away. */
if (breakpoint_here_p (wait_pc))
{
return 1;
}
}
}
return 0;
}
static void
core_open (char *filename, int from_tty)
{
const char *p;
int siggy;
struct cleanup *old_chain;
char *temp;
bfd *temp_bfd;
int scratch_chan;
int flags;
volatile struct gdb_exception except;
target_preopen (from_tty);
if (!filename)
{
if (core_bfd)
error (_("No core file specified. (Use `detach' "
"to stop debugging a core file.)"));
else
error (_("No core file specified."));
}
filename = tilde_expand (filename);
if (!IS_ABSOLUTE_PATH (filename))
{
temp = concat (current_directory, "/",
filename, (char *) NULL);
xfree (filename);
filename = temp;
}
old_chain = make_cleanup (xfree, filename);
flags = O_BINARY | O_LARGEFILE;
if (write_files)
flags |= O_RDWR;
else
flags |= O_RDONLY;
scratch_chan = open (filename, flags, 0);
if (scratch_chan < 0)
perror_with_name (filename);
temp_bfd = bfd_fopen (filename, gnutarget,
write_files ? FOPEN_RUB : FOPEN_RB,
scratch_chan);
if (temp_bfd == NULL)
perror_with_name (filename);
if (!bfd_check_format (temp_bfd, bfd_core)
&& !gdb_check_format (temp_bfd))
{
/* Do it after the err msg */
/* FIXME: should be checking for errors from bfd_close (for one
thing, on error it does not free all the storage associated
with the bfd). */
make_cleanup_bfd_close (temp_bfd);
error (_("\"%s\" is not a core dump: %s"),
filename, bfd_errmsg (bfd_get_error ()));
}
/* Looks semi-reasonable. Toss the old core file and work on the
new. */
discard_cleanups (old_chain); /* Don't free filename any more */
unpush_target (&core_ops);
core_bfd = temp_bfd;
old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/);
/* FIXME: kettenis/20031023: This is very dangerous. The
CORE_GDBARCH that results from this call may very well be
different from CURRENT_GDBARCH. However, its methods may only
work if it is selected as the current architecture, because they
rely on swapped data (see gdbarch.c). We should get rid of that
swapped data. */
core_gdbarch = gdbarch_from_bfd (core_bfd);
/* Find a suitable core file handler to munch on core_bfd */
core_vec = sniff_core_bfd (core_bfd);
validate_files ();
core_data = XZALLOC (struct target_section_table);
/* Find the data section */
if (build_section_table (core_bfd,
&core_data->sections,
&core_data->sections_end))
error (_("\"%s\": Can't find sections: %s"),
bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ()));
/* If we have no exec file, try to set the architecture from the
core file. We don't do this unconditionally since an exec file
typically contains more information that helps us determine the
architecture than a core file. */
if (!exec_bfd)
set_gdbarch_from_file (core_bfd);
push_target (&core_ops);
discard_cleanups (old_chain);
/* Do this before acknowledging the inferior, so if
post_create_inferior throws (can happen easilly if you're loading
a core file with the wrong exec), we aren't left with threads
from the previous inferior. */
init_thread_list ();
inferior_ptid = null_ptid;
/* Need to flush the register cache (and the frame cache) from a
previous debug session. If inferior_ptid ends up the same as the
last debug session --- e.g., b foo; run; gcore core1; step; gcore
core2; core core1; core core2 --- then there's potential for
get_current_regcache to return the cached regcache of the
previous session, and the frame cache being stale. */
registers_changed ();
/* Build up thread list from BFD sections, and possibly set the
current thread to the .reg/NN section matching the .reg
section. */
bfd_map_over_sections (core_bfd, add_to_thread_list,
bfd_get_section_by_name (core_bfd, ".reg"));
if (ptid_equal (inferior_ptid, null_ptid))
{
/* Either we found no .reg/NN section, and hence we have a
non-threaded core (single-threaded, from gdb's perspective),
or for some reason add_to_thread_list couldn't determine
which was the "main" thread. The latter case shouldn't
usually happen, but we're dealing with input here, which can
always be broken in different ways. */
struct thread_info *thread = first_thread_of_process (-1);
if (thread == NULL)
{
inferior_appeared (current_inferior (), CORELOW_PID);
inferior_ptid = pid_to_ptid (CORELOW_PID);
add_thread_silent (inferior_ptid);
}
else
switch_to_thread (thread->ptid);
}
post_create_inferior (&core_ops, from_tty);
/* Now go through the target stack looking for threads since there
may be a thread_stratum target loaded on top of target core by
now. The layer above should claim threads found in the BFD
sections. */
TRY_CATCH (except, RETURN_MASK_ERROR)
{
target_find_new_threads ();
}
if (except.reason < 0)
exception_print (gdb_stderr, except);
p = bfd_core_file_failing_command (core_bfd);
if (p)
printf_filtered (_("Core was generated by `%s'.\n"), p);
siggy = bfd_core_file_failing_signal (core_bfd);
if (siggy > 0)
{
/* If we don't have a CORE_GDBARCH to work with, assume a native
core (map gdb_signal from host signals). If we do have
CORE_GDBARCH to work with, but no gdb_signal_from_target
implementation for that gdbarch, as a fallback measure,
assume the host signal mapping. It'll be correct for native
cores, but most likely incorrect for cross-cores. */
enum gdb_signal sig = (core_gdbarch != NULL
&& gdbarch_gdb_signal_from_target_p (core_gdbarch)
? gdbarch_gdb_signal_from_target (core_gdbarch,
siggy)
: gdb_signal_from_host (siggy));
printf_filtered (_("Program terminated with signal %d, %s.\n"),
siggy, gdb_signal_to_string (sig));
}
/* Fetch all registers from core file. */
target_fetch_registers (get_current_regcache (), -1);
/* Now, set up the frame cache, and print the top of stack. */
reinit_frame_cache ();
print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
}
static void
core_open (const char *arg, int from_tty)
{
const char *p;
int siggy;
struct cleanup *old_chain;
char *temp;
int scratch_chan;
int flags;
char *filename;
target_preopen (from_tty);
if (!arg)
{
if (core_bfd)
error (_("No core file specified. (Use `detach' "
"to stop debugging a core file.)"));
else
error (_("No core file specified."));
}
filename = tilde_expand (arg);
if (!IS_ABSOLUTE_PATH (filename))
{
temp = concat (current_directory, "/",
filename, (char *) NULL);
xfree (filename);
filename = temp;
}
old_chain = make_cleanup (xfree, filename);
flags = O_BINARY | O_LARGEFILE;
if (write_files)
flags |= O_RDWR;
else
flags |= O_RDONLY;
scratch_chan = gdb_open_cloexec (filename, flags, 0);
if (scratch_chan < 0)
perror_with_name (filename);
gdb_bfd_ref_ptr temp_bfd (gdb_bfd_fopen (filename, gnutarget,
write_files ? FOPEN_RUB : FOPEN_RB,
scratch_chan));
if (temp_bfd == NULL)
perror_with_name (filename);
if (!bfd_check_format (temp_bfd.get (), bfd_core)
&& !gdb_check_format (temp_bfd.get ()))
{
/* Do it after the err msg */
/* FIXME: should be checking for errors from bfd_close (for one
thing, on error it does not free all the storage associated
with the bfd). */
error (_("\"%s\" is not a core dump: %s"),
filename, bfd_errmsg (bfd_get_error ()));
}
/* Looks semi-reasonable. Toss the old core file and work on the
new. */
do_cleanups (old_chain);
unpush_target (&core_ops);
core_bfd = temp_bfd.release ();
old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/);
core_gdbarch = gdbarch_from_bfd (core_bfd);
/* Find a suitable core file handler to munch on core_bfd */
core_vec = sniff_core_bfd (core_bfd);
validate_files ();
core_data = XCNEW (struct target_section_table);
/* Find the data section */
if (build_section_table (core_bfd,
&core_data->sections,
&core_data->sections_end))
error (_("\"%s\": Can't find sections: %s"),
bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ()));
/* If we have no exec file, try to set the architecture from the
core file. We don't do this unconditionally since an exec file
typically contains more information that helps us determine the
architecture than a core file. */
if (!exec_bfd)
set_gdbarch_from_file (core_bfd);
push_target (&core_ops);
discard_cleanups (old_chain);
/* Do this before acknowledging the inferior, so if
post_create_inferior throws (can happen easilly if you're loading
a core file with the wrong exec), we aren't left with threads
from the previous inferior. */
init_thread_list ();
inferior_ptid = null_ptid;
/* Need to flush the register cache (and the frame cache) from a
previous debug session. If inferior_ptid ends up the same as the
last debug session --- e.g., b foo; run; gcore core1; step; gcore
core2; core core1; core core2 --- then there's potential for
get_current_regcache to return the cached regcache of the
previous session, and the frame cache being stale. */
registers_changed ();
/* Build up thread list from BFD sections, and possibly set the
current thread to the .reg/NN section matching the .reg
section. */
bfd_map_over_sections (core_bfd, add_to_thread_list,
bfd_get_section_by_name (core_bfd, ".reg"));
if (ptid_equal (inferior_ptid, null_ptid))
{
/* Either we found no .reg/NN section, and hence we have a
non-threaded core (single-threaded, from gdb's perspective),
or for some reason add_to_thread_list couldn't determine
which was the "main" thread. The latter case shouldn't
usually happen, but we're dealing with input here, which can
always be broken in different ways. */
struct thread_info *thread = first_thread_of_process (-1);
if (thread == NULL)
{
inferior_appeared (current_inferior (), CORELOW_PID);
inferior_ptid = pid_to_ptid (CORELOW_PID);
add_thread_silent (inferior_ptid);
}
else
switch_to_thread (thread->ptid);
}
post_create_inferior (&core_ops, from_tty);
/* Now go through the target stack looking for threads since there
may be a thread_stratum target loaded on top of target core by
now. The layer above should claim threads found in the BFD
sections. */
TRY
{
target_update_thread_list ();
}
CATCH (except, RETURN_MASK_ERROR)
{
exception_print (gdb_stderr, except);
}
void
core_target_open (const char *arg, int from_tty)
{
const char *p;
int siggy;
int scratch_chan;
int flags;
target_preopen (from_tty);
if (!arg)
{
if (core_bfd)
error (_("No core file specified. (Use `detach' "
"to stop debugging a core file.)"));
else
error (_("No core file specified."));
}
gdb::unique_xmalloc_ptr<char> filename (tilde_expand (arg));
if (!IS_ABSOLUTE_PATH (filename.get ()))
filename.reset (concat (current_directory, "/",
filename.get (), (char *) NULL));
flags = O_BINARY | O_LARGEFILE;
if (write_files)
flags |= O_RDWR;
else
flags |= O_RDONLY;
scratch_chan = gdb_open_cloexec (filename.get (), flags, 0);
if (scratch_chan < 0)
perror_with_name (filename.get ());
gdb_bfd_ref_ptr temp_bfd (gdb_bfd_fopen (filename.get (), gnutarget,
write_files ? FOPEN_RUB : FOPEN_RB,
scratch_chan));
if (temp_bfd == NULL)
perror_with_name (filename.get ());
if (!bfd_check_format (temp_bfd.get (), bfd_core)
&& !gdb_check_format (temp_bfd.get ()))
{
/* Do it after the err msg */
/* FIXME: should be checking for errors from bfd_close (for one
thing, on error it does not free all the storage associated
with the bfd). */
error (_("\"%s\" is not a core dump: %s"),
filename.get (), bfd_errmsg (bfd_get_error ()));
}
current_program_space->cbfd = std::move (temp_bfd);
core_target *target = new core_target ();
/* Own the target until it is successfully pushed. */
target_ops_up target_holder (target);
validate_files ();
/* If we have no exec file, try to set the architecture from the
core file. We don't do this unconditionally since an exec file
typically contains more information that helps us determine the
architecture than a core file. */
if (!exec_bfd)
set_gdbarch_from_file (core_bfd);
push_target (std::move (target_holder));
inferior_ptid = null_ptid;
/* Need to flush the register cache (and the frame cache) from a
previous debug session. If inferior_ptid ends up the same as the
last debug session --- e.g., b foo; run; gcore core1; step; gcore
core2; core core1; core core2 --- then there's potential for
get_current_regcache to return the cached regcache of the
previous session, and the frame cache being stale. */
registers_changed ();
/* Build up thread list from BFD sections, and possibly set the
current thread to the .reg/NN section matching the .reg
section. */
bfd_map_over_sections (core_bfd, add_to_thread_list,
bfd_get_section_by_name (core_bfd, ".reg"));
if (inferior_ptid == null_ptid)
{
/* Either we found no .reg/NN section, and hence we have a
non-threaded core (single-threaded, from gdb's perspective),
or for some reason add_to_thread_list couldn't determine
which was the "main" thread. The latter case shouldn't
usually happen, but we're dealing with input here, which can
always be broken in different ways. */
thread_info *thread = first_thread_of_inferior (current_inferior ());
if (thread == NULL)
{
inferior_appeared (current_inferior (), CORELOW_PID);
inferior_ptid = ptid_t (CORELOW_PID);
add_thread_silent (inferior_ptid);
}
else
switch_to_thread (thread);
}
post_create_inferior (target, from_tty);
/* Now go through the target stack looking for threads since there
may be a thread_stratum target loaded on top of target core by
now. The layer above should claim threads found in the BFD
sections. */
try
{
target_update_thread_list ();
}
catch (const gdb_exception_error &except)
{
exception_print (gdb_stderr, except);
}
p = bfd_core_file_failing_command (core_bfd);
if (p)
printf_filtered (_("Core was generated by `%s'.\n"), p);
/* Clearing any previous state of convenience variables. */
clear_exit_convenience_vars ();
siggy = bfd_core_file_failing_signal (core_bfd);
if (siggy > 0)
{
gdbarch *core_gdbarch = target->core_gdbarch ();
/* If we don't have a CORE_GDBARCH to work with, assume a native
core (map gdb_signal from host signals). If we do have
CORE_GDBARCH to work with, but no gdb_signal_from_target
implementation for that gdbarch, as a fallback measure,
assume the host signal mapping. It'll be correct for native
cores, but most likely incorrect for cross-cores. */
enum gdb_signal sig = (core_gdbarch != NULL
&& gdbarch_gdb_signal_from_target_p (core_gdbarch)
? gdbarch_gdb_signal_from_target (core_gdbarch,
siggy)
: gdb_signal_from_host (siggy));
printf_filtered (_("Program terminated with signal %s, %s.\n"),
gdb_signal_to_name (sig), gdb_signal_to_string (sig));
/* Set the value of the internal variable $_exitsignal,
which holds the signal uncaught by the inferior. */
set_internalvar_integer (lookup_internalvar ("_exitsignal"),
siggy);
}
/* Fetch all registers from core file. */
target_fetch_registers (get_current_regcache (), -1);
/* Now, set up the frame cache, and print the top of stack. */
reinit_frame_cache ();
print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
/* Current thread should be NUM 1 but the user does not know that.
If a program is single threaded gdb in general does not mention
anything about threads. That is why the test is >= 2. */
if (thread_count () >= 2)
{
try
{
thread_command (NULL, from_tty);
}
catch (const gdb_exception_error &except)
{
exception_print (gdb_stderr, except);
}
}
}
