static void
inf_ptrace_attach (struct target_ops *ops, char *args, int from_tty)
{
char *exec_file;
pid_t pid;
struct inferior *inf;
/* Do not change either targets above or the same target if already present.
The reason is the target stack is shared across multiple inferiors. */
int ops_already_pushed = target_is_pushed (ops);
struct cleanup *back_to = NULL;
pid = parse_pid_to_attach (args);
if (pid == getpid ()) /* Trying to m********e? */
error (_("I refuse to debug myself!"));
if (! ops_already_pushed)
{
/* target_pid_to_str already uses the target. Also clear possible core
file with its process_stratum. */
push_target (ops);
back_to = make_cleanup_unpush_target (ops);
}
if (from_tty)
{
exec_file = get_exec_file (0);
if (exec_file)
printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
target_pid_to_str (pid_to_ptid (pid)));
else
printf_unfiltered (_("Attaching to %s\n"),
target_pid_to_str (pid_to_ptid (pid)));
gdb_flush (gdb_stdout);
}
#ifdef PT_ATTACH
errno = 0;
ptrace (PT_ATTACH, pid, (PTRACE_TYPE_ARG3)0, 0);
if (errno != 0)
perror_with_name (("ptrace"));
#else
error (_("This system does not support attaching to a process"));
#endif
inf = current_inferior ();
inferior_appeared (inf, pid);
inf->attach_flag = 1;
inferior_ptid = pid_to_ptid (pid);
/* Always add a main thread. If some target extends the ptrace
target, it should decorate the ptid later with more info. */
add_thread_silent (inferior_ptid);
if (! ops_already_pushed)
discard_cleanups (back_to);
}
void
add_target_sections (void *owner,
struct target_section *sections,
struct target_section *sections_end)
{
int count;
struct target_section_table *table = current_target_sections;
count = sections_end - sections;
if (count > 0)
{
int space = resize_section_table (table, count);
int i;
for (i = 0; i < count; ++i)
{
table->sections[space + i] = sections[i];
table->sections[space + i].owner = owner;
}
/* If these are the first file sections we can provide memory
from, push the file_stratum target. */
if (!using_exec_ops)
{
using_exec_ops = 1;
push_target (&exec_ops);
}
}
}
static void
inf_ptrace_create_inferior (struct target_ops *ops,
char *exec_file, char *allargs, char **env,
int from_tty)
{
int pid;
pid = fork_inferior (exec_file, allargs, env, inf_ptrace_me, NULL,
NULL, NULL);
push_target (ops);
/* On some targets, there must be some explicit synchronization
between the parent and child processes after the debugger
forks, and before the child execs the debuggee program. This
call basically gives permission for the child to exec. */
target_acknowledge_created_inferior (pid);
/* START_INFERIOR_TRAPS_EXPECTED is defined in inferior.h, and will
be 1 or 2 depending on whether we're starting without or with a
shell. */
startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
/* On some targets, there must be some explicit actions taken after
the inferior has been started up. */
target_post_startup_inferior (pid_to_ptid (pid));
}
void
add_target_sections (struct target_section *sections,
struct target_section *sections_end)
{
int count;
struct target_section_table *table = current_target_sections;
count = sections_end - sections;
if (count > 0)
{
int space = resize_section_table (table, count);
memcpy (table->sections + space,
sections, count * sizeof (sections[0]));
/* If these are the first file sections we can provide memory
from, push the file_stratum target. */
if (!using_exec_ops)
{
using_exec_ops = 1;
push_target (&exec_ops);
}
}
}
static void
inf_ptrace_create_inferior (struct target_ops *ops,
char *exec_file, char *allargs, char **env,
int from_tty)
{
int pid;
/* Do not change either targets above or the same target if already present.
The reason is the target stack is shared across multiple inferiors. */
int ops_already_pushed = target_is_pushed (ops);
struct cleanup *back_to = NULL;
if (! ops_already_pushed)
{
/* Clear possible core file with its process_stratum. */
push_target (ops);
back_to = make_cleanup_unpush_target (ops);
}
pid = fork_inferior (exec_file, allargs, env, inf_ptrace_me, NULL,
NULL, NULL, NULL);
if (! ops_already_pushed)
discard_cleanups (back_to);
startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
/* On some targets, there must be some explicit actions taken after
the inferior has been started up. */
target_post_startup_inferior (pid_to_ptid (pid));
}
static void
enable_dec_thread (void)
{
struct minimal_symbol *msym;
void* caller_context;
int status;
/* If already active, nothing more to do. */
if (dec_thread_active)
return;
msym = lookup_minimal_symbol ("__pthread_dbg_symtable", NULL, NULL);
if (msym == NULL)
{
debug ("enable_dec_thread: No __pthread_dbg_symtable");
return;
}
status = pthreadDebugContextInit (&caller_context, &debug_callbacks,
(void *) SYMBOL_VALUE_ADDRESS (msym),
&debug_context);
if (status != ESUCCESS)
{
debug ("enable_dec_thread: pthreadDebugContextInit -> %d",
status);
return;
}
push_target (&dec_thread_ops);
dec_thread_active = 1;
debug ("enable_dec_thread: Thread support enabled.");
}
static void
fbsd_thread_create_inferior (char *exec_file, char *allargs, char **env)
{
if (fbsd_thread_present && !fbsd_thread_active)
push_target(&fbsd_thread_ops);
child_ops.to_create_inferior (exec_file, allargs, env);
}
void
inf_child_open_target (struct target_ops *target, char *arg, int from_tty)
{
target_preopen (from_tty);
push_target (target);
inf_child_explicitly_opened = 1;
if (from_tty)
printf_filtered ("Done. Use the \"run\" command to start a process.\n");
}
static void
check_for_thread_db (void)
{
td_err_e err;
if (td_ta_new_p == NULL)
return;
/* Don't try to attach to a dead target if there is no core file. */
if (!target_has_execution && core_bfd == NULL)
return;
/* Nothing to do. The thread library was already detected and the
target vector was already activated. */
if (fbsd_thread_active)
return;
/* Now, initialize libthread_db. This needs to be done after the
shared libraries are located because it needs information from
the user's thread library. */
err = td_init_p ();
if (err != TD_OK)
{
warning ("Cannot initialize libthread_db: %s", thread_db_err_str (err));
return;
}
/* Initialize the structure that identifies the child process. Note
that at this point there is no guarantee that we actually have a
child process. */
proc_handle.pid = GET_PID (inferior_ptid);
/* Now attempt to open a connection to the thread library. */
err = td_ta_new_p (&proc_handle, &thread_agent);
switch (err)
{
case TD_NOLIBTHREAD:
/* No thread library was detected. */
break;
case TD_OK:
/* The thread library was detected. Activate the thread_db target. */
push_target(&fbsd_thread_ops);
fbsd_thread_present = 1;
fbsd_thread_activate();
break;
default:
warning ("Cannot initialize thread debugging library: %s",
thread_db_err_str (err));
break;
}
}
static void
inf_ptrace_attach (struct target_ops *ops, char *args, int from_tty)
{
char *exec_file;
pid_t pid;
char *dummy;
struct inferior *inf;
if (!args)
error_no_arg (_("process-id to attach"));
dummy = args;
pid = strtol (args, &dummy, 0);
/* Some targets don't set errno on errors, grrr! */
if (pid == 0 && args == dummy)
error (_("Illegal process-id: %s."), args);
if (pid == getpid ()) /* Trying to m********e? */
error (_("I refuse to debug myself!"));
if (from_tty)
{
exec_file = get_exec_file (0);
if (exec_file)
printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
target_pid_to_str (pid_to_ptid (pid)));
else
printf_unfiltered (_("Attaching to %s\n"),
target_pid_to_str (pid_to_ptid (pid)));
gdb_flush (gdb_stdout);
}
#ifdef PT_ATTACH
errno = 0;
ptrace (PT_ATTACH, pid, (PTRACE_TYPE_ARG3)0, 0);
if (errno != 0)
perror_with_name (("ptrace"));
#else
error (_("This system does not support attaching to a process"));
#endif
inferior_ptid = pid_to_ptid (pid);
inf = add_inferior (pid);
inf->attach_flag = 1;
/* Always add a main thread. If some target extends the ptrace
target, it should decorate the ptid later with more info. */
add_thread_silent (inferior_ptid);
push_target(ops);
}
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 ();
}
static void
fbsd_thread_attach (char *args, int from_tty)
{
fbsd_thread_core = 0;
child_ops.to_attach (args, from_tty);
/* Must get symbols from solibs before libthread_db can run! */
SOLIB_ADD ((char *) 0, from_tty, (struct target_ops *) 0, auto_solib_add);
if (fbsd_thread_present && !fbsd_thread_active)
push_target(&fbsd_thread_ops);
}
static void
inf_ptrace_attach (char *args, int from_tty)
{
char *exec_file;
pid_t pid;
char *dummy;
if (!args)
error_no_arg (_("process-id to attach"));
dummy = args;
pid = strtol (args, &dummy, 0);
/* Some targets don't set errno on errors, grrr! */
if (pid == 0 && args == dummy)
error (_("Illegal process-id: %s."), args);
if (pid == getpid ()) /* Trying to m********e? */
error (_("I refuse to debug myself!"));
if (from_tty)
{
exec_file = get_exec_file (0);
if (exec_file)
printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
target_pid_to_str (pid_to_ptid (pid)));
else
printf_unfiltered (_("Attaching to %s\n"),
target_pid_to_str (pid_to_ptid (pid)));
gdb_flush (gdb_stdout);
}
#ifdef PT_ATTACH
errno = 0;
ptrace (PT_ATTACH, pid, (PTRACE_TYPE_ARG3)0, 0);
if (errno != 0)
perror_with_name (("ptrace"));
attach_flag = 1;
#else
error (_("This system does not support attaching to a process"));
#endif
inferior_ptid = pid_to_ptid (pid);
push_target (ptrace_ops_hack);
/* Do this first, before anything has had a chance to query the
inferior's symbol table or similar. */
observer_notify_inferior_created (¤t_target, from_tty);
}
static void
child_attach_to_process (char *args, int from_tty, int after_fork)
{
if (!args)
error_no_arg ("process-id to attach");
#ifndef ATTACH_DETACH
error ("Can't attach to a process on this machine.");
#else
{
char *exec_file;
int pid;
char *dummy;
dummy = args;
pid = strtol (args, &dummy, 0);
/* Some targets don't set errno on errors, grrr! */
if ((pid == 0) && (args == dummy))
error ("Illegal process-id: %s\n", args);
if (pid == getpid ()) /* Trying to m********e? */
error ("I refuse to debug myself!");
if (from_tty)
{
exec_file = (char *) get_exec_file (0);
if (after_fork)
printf_unfiltered ("Attaching after fork to %s\n",
target_pid_to_str (pid_to_ptid (pid)));
else if (exec_file)
printf_unfiltered ("Attaching to program: %s, %s\n", exec_file,
target_pid_to_str (pid_to_ptid (pid)));
else
printf_unfiltered ("Attaching to %s\n",
target_pid_to_str (pid_to_ptid (pid)));
gdb_flush (gdb_stdout);
}
if (!after_fork)
attach (pid);
else
REQUIRE_ATTACH (pid);
inferior_ptid = pid_to_ptid (pid);
push_target (&child_ops);
}
#endif /* ATTACH_DETACH */
}
static void
nbsd_thread_attach (struct target_ops *ops, const char *args, int from_tty)
{
struct target_ops *beneath = find_target_beneath (ops);
nbsd_thread_core = 0;
if (nbsd_thread_present && !nbsd_thread_active)
push_target(&nbsd_thread_ops);
beneath->to_attach (beneath, args, from_tty);
/* seems like a good place to activate, but isn't. Let it happen in
nbsd_thread_post_attach(), after a wait has occurred. */
}
/* opens the file /dev/cmem */
static void
lk_open (char *string , int from_tty)
{
target_preopen (from_tty);
lk_close (0); /* just in case. */
lk_file = open ("/dev/cmem", O_RDONLY);
if (lk_file < 0)
error ("Unable to open /dev/cmem: %s", strerror (errno));
if (from_tty)
printf ("Linux kernel debugging active\n");
push_target (&lk_ops);
lk_break_happened = 1;
start_remote(); /* this should get things going. */
}
static void
nbsd_thread_create_inferior (struct target_ops *ops, char *exec_file,
char *allargs, char **env, int from_tty)
{
struct target_ops *beneath = find_target_beneath (ops);
nbsd_thread_core = 0;
if (nbsd_thread_present && !nbsd_thread_active)
push_target(&nbsd_thread_ops);
beneath->to_create_inferior (beneath, exec_file, allargs, env, from_tty);
if (nbsd_thread_present && !nbsd_thread_active)
nbsd_thread_activate();
}
static void
hpux_thread_create_inferior (char *exec_file, char *allargs, char **env,
int from_tty)
{
deprecated_child_ops.to_create_inferior (exec_file, allargs, env, from_tty);
if (hpux_thread_active)
{
main_ptid = inferior_ptid;
push_target (&hpux_thread_ops);
inferior_ptid = find_active_thread ();
add_thread (inferior_ptid);
}
}
static void
sol_thread_create_inferior (char *exec_file, char *allargs, char **env)
{
procfs_ops.to_create_inferior (exec_file, allargs, env);
if (sol_thread_active && !ptid_equal (inferior_ptid, null_ptid))
{
main_ph.ptid = inferior_ptid; /* Save for xfer_memory */
push_target (&sol_thread_ops);
inferior_ptid = lwp_to_thread (inferior_ptid);
if (PIDGET (inferior_ptid) == -1)
inferior_ptid = main_ph.ptid;
if (!in_thread_list (inferior_ptid))
add_thread (inferior_ptid);
}
}
static void
child_attach (char *args, int from_tty)
{
char *exec_file;
int pid;
char *dummy;
if (!args)
error_no_arg (_("process-id to attach"));
dummy = args;
pid = strtol (args, &dummy, 0);
/* Some targets don't set errno on errors, grrr! */
if ((pid == 0) && (args == dummy))
error (_("Illegal process-id: %s."), args);
if (pid == getpid ()) /* Trying to m********e? */
error (_("I refuse to debug myself!"));
if (from_tty)
{
exec_file = (char *) get_exec_file (0);
if (exec_file)
printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
target_pid_to_str (pid_to_ptid (pid)));
else
printf_unfiltered (_("Attaching to %s\n"),
target_pid_to_str (pid_to_ptid (pid)));
gdb_flush (gdb_stdout);
}
attach (pid);
inferior_ptid = pid_to_ptid (pid);
push_target (&deprecated_child_ops);
/* Do this first, before anything has had a chance to query the
inferior's symbol table or similar. */
observer_notify_inferior_created (¤t_target, from_tty);
}
static void
sol_thread_attach (char *args, int from_tty)
{
procfs_ops.to_attach (args, from_tty);
/* Must get symbols from solibs before libthread_db can run! */
SOLIB_ADD ((char *) 0, from_tty, (struct target_ops *) 0, auto_solib_add);
if (sol_thread_active)
{
printf_filtered ("sol-thread active.\n");
main_ph.ptid = inferior_ptid; /* Save for xfer_memory */
push_target (&sol_thread_ops);
inferior_ptid = lwp_to_thread (inferior_ptid);
if (PIDGET (inferior_ptid) == -1)
inferior_ptid = main_ph.ptid;
else
add_thread (inferior_ptid);
}
/* XXX - might want to iterate over all the threads and register them. */
}
static void
inf_ptrace_him (int pid)
{
push_target (ptrace_ops_hack);
/* On some targets, there must be some explicit synchronization
between the parent and child processes after the debugger
forks, and before the child execs the debuggee program. This
call basically gives permission for the child to exec. */
target_acknowledge_created_inferior (pid);
/* START_INFERIOR_TRAPS_EXPECTED is defined in inferior.h, and will
be 1 or 2 depending on whether we're starting without or with a
shell. */
startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
/* On some targets, there must be some explicit actions taken after
the inferior has been started up. */
target_post_startup_inferior (pid_to_ptid (pid));
}
static void
nbsd_thread_new_objfile (struct objfile *objfile)
{
int val;
if (!objfile)
{
nbsd_thread_active = 0;
goto quit;
}
/* Don't do anything if we've already fired up the debugging library */
if (nbsd_thread_active)
goto quit;
/* Now, initialize the thread debugging library. This needs to be
done after the shared libraries are located because it needs
information from the user's thread library. */
val = td_open (&nbsd_thread_callbacks, &main_arg, &main_ta);
if (val == TD_ERR_NOLIB)
goto quit;
else if (val != 0)
{
warning ("nbsd_thread_new_objfile: td_open: %s", td_err_string (val));
goto quit;
}
nbsd_thread_present = 1;
if ((nbsd_thread_core == 0) &&
!ptid_equal (inferior_ptid, null_ptid))
{
push_target (&nbsd_thread_ops);
nbsd_thread_activate();
}
quit:
return;
}
static void
record_btrace_open (char *args, int from_tty)
{
struct cleanup *disable_chain;
struct thread_info *tp;
DEBUG ("open");
record_preopen ();
if (!target_has_execution)
error (_("The program is not being run."));
if (!target_supports_btrace ())
error (_("Target does not support branch tracing."));
if (non_stop)
error (_("Record btrace can't debug inferior in non-stop mode."));
gdb_assert (record_btrace_thread_observer == NULL);
disable_chain = make_cleanup (null_cleanup, NULL);
ALL_THREADS (tp)
if (args == NULL || *args == 0 || number_is_in_list (args, tp->num))
{
btrace_enable (tp);
make_cleanup (record_btrace_disable_callback, tp);
}
record_btrace_auto_enable ();
push_target (&record_btrace_ops);
observer_notify_record_changed (current_inferior (), 1);
discard_cleanups (disable_chain);
}
void
inf_ptrace_target::create_inferior (const char *exec_file,
const std::string &allargs,
char **env, int from_tty)
{
pid_t pid;
ptid_t ptid;
/* Do not change either targets above or the same target if already present.
The reason is the target stack is shared across multiple inferiors. */
int ops_already_pushed = target_is_pushed (this);
target_unpush_up unpusher;
if (! ops_already_pushed)
{
/* Clear possible core file with its process_stratum. */
push_target (this);
unpusher.reset (this);
}
pid = fork_inferior (exec_file, allargs, env, inf_ptrace_me, NULL,
NULL, NULL, NULL);
ptid = ptid_t (pid);
/* We have something that executes now. We'll be running through
the shell at this point (if startup-with-shell is true), but the
pid shouldn't change. */
add_thread_silent (ptid);
unpusher.release ();
gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED);
/* On some targets, there must be some explicit actions taken after
the inferior has been started up. */
target_post_startup_inferior (ptid);
}
static void
tfile_open (const char *arg, int from_tty)
{
char *temp;
struct cleanup *old_chain;
int flags;
int scratch_chan;
char header[TRACE_HEADER_SIZE];
char linebuf[1000]; /* Should be max remote packet size or so. */
gdb_byte byte;
int bytes, i;
struct trace_status *ts;
struct uploaded_tp *uploaded_tps = NULL;
struct uploaded_tsv *uploaded_tsvs = NULL;
char *filename;
target_preopen (from_tty);
if (!arg)
error (_("No trace 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;
flags |= O_RDONLY;
scratch_chan = gdb_open_cloexec (filename, flags, 0);
if (scratch_chan < 0)
perror_with_name (filename);
/* Looks semi-reasonable. Toss the old trace file and work on the new. */
discard_cleanups (old_chain); /* Don't free filename any more. */
unpush_target (&tfile_ops);
trace_filename = xstrdup (filename);
trace_fd = scratch_chan;
/* Make sure this is clear. */
buffer_free (&trace_tdesc);
bytes = 0;
/* Read the file header and test for validity. */
tfile_read ((gdb_byte *) &header, TRACE_HEADER_SIZE);
bytes += TRACE_HEADER_SIZE;
if (!(header[0] == 0x7f
&& (startswith (header + 1, "TRACE0\n"))))
error (_("File is not a valid trace file."));
push_target (&tfile_ops);
trace_regblock_size = 0;
ts = current_trace_status ();
/* We know we're working with a file. Record its name. */
ts->filename = trace_filename;
/* Set defaults in case there is no status line. */
ts->running_known = 0;
ts->stop_reason = trace_stop_reason_unknown;
ts->traceframe_count = -1;
ts->buffer_free = 0;
ts->disconnected_tracing = 0;
ts->circular_buffer = 0;
TRY
{
/* Read through a section of newline-terminated lines that
define things like tracepoints. */
i = 0;
while (1)
{
tfile_read (&byte, 1);
++bytes;
if (byte == '\n')
{
/* Empty line marks end of the definition section. */
if (i == 0)
break;
linebuf[i] = '\0';
i = 0;
tfile_interp_line (linebuf, &uploaded_tps, &uploaded_tsvs);
}
else
linebuf[i++] = byte;
if (i >= 1000)
error (_("Excessively long lines in trace file"));
}
/* By now, tdesc lines have been read from tfile - let's parse them. */
target_find_description ();
/* Record the starting offset of the binary trace data. */
trace_frames_offset = bytes;
/* If we don't have a blocksize, we can't interpret the
traceframes. */
if (trace_regblock_size == 0)
error (_("No register block size recorded in trace file"));
}
CATCH (ex, RETURN_MASK_ALL)
{
/* Remove the partially set up target. */
unpush_target (&tfile_ops);
throw_exception (ex);
}
static void
fbsd_thread_new_objfile (struct objfile *objfile)
{
td_err_e err;
if (objfile == NULL)
{
/* All symbols have been discarded. If the thread_db target is
active, deactivate it now. */
if (fbsd_thread_active)
{
gdb_assert (proc_handle.pid == 0);
fbsd_thread_active = 0;
}
goto quit;
}
if (!child_suppress_run)
goto quit;
/* Nothing to do. The thread library was already detected and the
target vector was already activated. */
if (fbsd_thread_active)
goto quit;
/* Initialize the structure that identifies the child process. Note
that at this point there is no guarantee that we actually have a
child process. */
proc_handle.pid = GET_PID (inferior_ptid);
/* Now attempt to open a connection to the thread library. */
err = td_ta_new_p (&proc_handle, &thread_agent);
switch (err)
{
case TD_NOLIBTHREAD:
/* No thread library was detected. */
break;
case TD_OK:
/* The thread library was detected. Activate the thread_db target. */
fbsd_thread_present = 1;
/* We can only poke around if there actually is a child process.
If there is no child process alive, postpone the steps below
until one has been created. */
if (fbsd_thread_core == 0 && proc_handle.pid != 0)
{
push_target(&fbsd_thread_ops);
fbsd_thread_activate();
}
else
{
td_ta_delete_p(thread_agent);
thread_agent = NULL;
}
break;
default:
warning ("Cannot initialize thread debugging library: %s",
thread_db_err_str (err));
break;
}
quit:
if (target_new_objfile_chain)
target_new_objfile_chain (objfile);
}
static void
kgdb_trgt_open(char *filename, int from_tty)
{
struct cleanup *old_chain;
struct thread_info *ti;
struct kthr *kt;
kvm_t *nkvm;
char *temp;
int ontop;
target_preopen (from_tty);
if (!filename)
error ("No vmcore file specified.");
if (!exec_bfd)
error ("Can't open a vmcore without a kernel");
filename = tilde_expand (filename);
if (filename[0] != '/') {
temp = concat (current_directory, "/", filename, NULL);
xfree(filename);
filename = temp;
}
old_chain = make_cleanup (xfree, filename);
nkvm = kvm_openfiles(bfd_get_filename(exec_bfd), filename, NULL,
write_files ? O_RDWR : O_RDONLY, kvm_err);
if (nkvm == NULL)
error ("Failed to open vmcore: %s", kvm_err);
/* Don't free the filename now and close any previous vmcore. */
discard_cleanups(old_chain);
unpush_target(&kgdb_trgt_ops);
kvm = nkvm;
vmcore = filename;
old_chain = make_cleanup(kgdb_core_cleanup, NULL);
ontop = !push_target (&kgdb_trgt_ops);
discard_cleanups (old_chain);
kgdb_dmesg();
init_thread_list();
kt = kgdb_thr_init();
while (kt != NULL) {
ti = add_thread(pid_to_ptid(kt->tid));
kt = kgdb_thr_next(kt);
}
if (curkthr != 0)
inferior_ptid = pid_to_ptid(curkthr->tid);
if (ontop) {
/* XXX: fetch registers? */
kld_init();
flush_cached_frames();
select_frame (get_current_frame());
print_stack_frame(get_selected_frame(),
frame_relative_level(get_selected_frame()), 1);
} else
warning(
"you won't be able to access this vmcore until you terminate\n\
your %s; do ``info files''", target_longname);
}
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);
}
