/* Target-struct-independent code to start (run) and stop an inferior process.
- Copyright 1986-1989, 1991-1999 Free Software Foundation, Inc.
+ Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of GDB.
#include "frame.h"
#include "inferior.h"
#include "breakpoint.h"
-#include "wait.h"
+#include "gdb_wait.h"
#include "gdbcore.h"
#include "gdbcmd.h"
+#include "cli/cli-script.h"
#include "target.h"
#include "gdbthread.h"
#include "annotate.h"
-#include "symfile.h" /* for overlay functions */
+#include "symfile.h"
#include "top.h"
#include <signal.h>
-#include "event-loop.h"
-#include "event-top.h"
-#include "remote.h" /* For cleanup_sigint_signal_handler. */
+#include "inf-loop.h"
+#include "regcache.h"
/* Prototypes for local functions */
static void sig_print_header (void);
-static void resume_cleanups (int);
+static void resume_cleanups (void *);
static int hook_stop_stub (void *);
static void set_follow_fork_mode_command (char *arg, int from_tty,
struct cmd_list_element * c);
-static void complete_execution (void);
-
static struct inferior_status *xmalloc_inferior_status (void);
static void free_inferior_status (struct inferior_status *);
static void set_schedlock_func (char *args, int from_tty,
struct cmd_list_element * c);
-static int is_internal_shlib_eventpoint (struct breakpoint * ep);
-
-static int stopped_for_internal_shlib_event (bpstat bs);
-
struct execution_control_state;
static int currently_stepping (struct execution_control_state *ecs);
int inferior_ignoring_startup_exec_events = 0;
int inferior_ignoring_leading_exec_events = 0;
+/* When set, stop the 'step' command if we enter a function which has
+ no line number information. The normal behavior is that we step
+ over such function. */
+int step_stop_if_no_debug = 0;
+
/* In asynchronous mode, but simulating synchronous execution. */
int sync_execution = 0;
when the inferior stopped in a different thread than it had been
running in. */
-static int switched_from_inferior_pid;
-
-/* This will be true for configurations that may actually report an
- inferior pid different from the original. At present this is only
- true for HP-UX native. */
-
-#ifndef MAY_SWITCH_FROM_INFERIOR_PID
-#define MAY_SWITCH_FROM_INFERIOR_PID (0)
-#endif
-
-static int may_switch_from_inferior_pid = MAY_SWITCH_FROM_INFERIOR_PID;
+static ptid_t previous_inferior_ptid;
/* This is true for configurations that may follow through execl() and
similar functions. At present this is only true for HP-UX native. */
static int may_follow_exec = MAY_FOLLOW_EXEC;
-/* resume and wait_for_inferior use this to ensure that when
- stepping over a hit breakpoint in a threaded application
- only the thread that hit the breakpoint is stepped and the
- other threads don't continue. This prevents having another
- thread run past the breakpoint while it is temporarily
- removed.
-
- This is not thread-specific, so it isn't saved as part of
- the infrun state.
-
- Versions of gdb which don't use the "step == this thread steps
- and others continue" model but instead use the "step == this
- thread steps and others wait" shouldn't do this. */
-
-static int thread_step_needed = 0;
-
-/* This is true if thread_step_needed should actually be used. At
- present this is only true for HP-UX native. */
-
-#ifndef USE_THREAD_STEP_NEEDED
-#define USE_THREAD_STEP_NEEDED (0)
-#endif
-
-static int use_thread_step_needed = USE_THREAD_STEP_NEEDED;
-
/* GET_LONGJMP_TARGET returns the PC at which longjmp() will resume the
program. It needs to examine the jmp_buf argument and extract the PC
from it. The return value is non-zero on success, zero otherwise. */
#endif
-/* Some machines have trampoline code that sits between function callers
- and the actual functions themselves. If this machine doesn't have
- such things, disable their processing. */
-
-#ifndef SKIP_TRAMPOLINE_CODE
-#define SKIP_TRAMPOLINE_CODE(pc) 0
-#endif
-
/* Dynamic function trampolines are similar to solib trampolines in that they
are between the caller and the callee. The difference is that when you
enter a dynamic trampoline, you can't determine the callee's address. Some
#ifndef SKIP_PERMANENT_BREAKPOINT
#define SKIP_PERMANENT_BREAKPOINT (default_skip_permanent_breakpoint)
static void
-default_skip_permanent_breakpoint ()
+default_skip_permanent_breakpoint (void)
{
error_begin ();
fprintf_filtered (gdb_stderr, "\
#define HAVE_CONTINUABLE_WATCHPOINT 1
#endif
+#ifndef CANNOT_STEP_HW_WATCHPOINTS
+#define CANNOT_STEP_HW_WATCHPOINTS 0
+#else
+#undef CANNOT_STEP_HW_WATCHPOINTS
+#define CANNOT_STEP_HW_WATCHPOINTS 1
+#endif
+
/* Tables of how to react to signals; the user sets them. */
static unsigned char *signal_stop;
(flags)[signum] = 0; \
} while (0)
+/* Value to pass to target_resume() to cause all threads to resume */
+
+#define RESUME_ALL (pid_to_ptid (-1))
/* Command list pointer for the "stop" placeholder. */
currently be running in a syscall. */
static int number_of_threads_in_syscalls;
+/* This is a cached copy of the pid/waitstatus of the last event
+ returned by target_wait()/target_wait_hook(). This information is
+ returned by get_last_target_status(). */
+static ptid_t target_last_wait_ptid;
+static struct target_waitstatus target_last_waitstatus;
+
/* This is used to remember when a fork, vfork or exec event
was caught by a catchpoint, and thus the event is to be
followed at the next resume of the inferior, and not
set to 1, a vfork event has been seen, but cannot be followed
until the exec is seen.
- (In the latter case, inferior_pid is still the parent of the
+ (In the latter case, inferior_ptid is still the parent of the
vfork, and pending_follow.fork_event.child_pid is the child. The
appropriate process is followed, according to the setting of
follow-fork-mode.) */
static int follow_vfork_when_exec;
-static char *follow_fork_mode_kind_names[] =
+static const char follow_fork_mode_ask[] = "ask";
+static const char follow_fork_mode_both[] = "both";
+static const char follow_fork_mode_child[] = "child";
+static const char follow_fork_mode_parent[] = "parent";
+
+static const char *follow_fork_mode_kind_names[] =
{
-/* ??rehrauer: The "both" option is broken, by what may be a 10.20
- kernel problem. It's also not terribly useful without a GUI to
- help the user drive two debuggers. So for now, I'm disabling
- the "both" option.
- "parent", "child", "both", "ask" };
- */
- "parent", "child", "ask"};
+ follow_fork_mode_ask,
+ /* ??rehrauer: The "both" option is broken, by what may be a 10.20
+ kernel problem. It's also not terribly useful without a GUI to
+ help the user drive two debuggers. So for now, I'm disabling the
+ "both" option. */
+ /* follow_fork_mode_both, */
+ follow_fork_mode_child,
+ follow_fork_mode_parent,
+ NULL
+};
-static char *follow_fork_mode_string = NULL;
+static const char *follow_fork_mode_string = follow_fork_mode_parent;
\f
static void
int followed_child = 0;
/* Which process did the user want us to follow? */
- char *follow_mode =
- savestring (follow_fork_mode_string, strlen (follow_fork_mode_string));
+ const char *follow_mode = follow_fork_mode_string;
/* Or, did the user not know, and want us to ask? */
- if (STREQ (follow_fork_mode_string, "ask"))
+ if (follow_fork_mode_string == follow_fork_mode_ask)
{
- char requested_mode[100];
-
- free (follow_mode);
- error ("\"ask\" mode NYI");
- follow_mode = savestring (requested_mode, strlen (requested_mode));
+ internal_error (__FILE__, __LINE__,
+ "follow_inferior_fork: \"ask\" mode not implemented");
+ /* follow_mode = follow_fork_mode_...; */
}
/* If we're to be following the parent, then detach from child_pid.
We're already following the parent, so need do nothing explicit
for it. */
- if (STREQ (follow_mode, "parent"))
+ if (follow_mode == follow_fork_mode_parent)
{
followed_parent = 1;
}
/* If we're to be following the child, then attach to it, detach
- from inferior_pid, and set inferior_pid to child_pid. */
- else if (STREQ (follow_mode, "child"))
+ from inferior_ptid, and set inferior_ptid to child_pid. */
+ else if (follow_mode == follow_fork_mode_child)
{
char child_pid_spelling[100]; /* Arbitrary length. */
/* Also reset the solib inferior hook from the parent. */
#ifdef SOLIB_REMOVE_INFERIOR_HOOK
- SOLIB_REMOVE_INFERIOR_HOOK (inferior_pid);
+ SOLIB_REMOVE_INFERIOR_HOOK (PIDGET (inferior_ptid));
#endif
/* Detach from the parent. */
target_detach (NULL, 1);
/* Attach to the child. */
- inferior_pid = child_pid;
+ inferior_ptid = pid_to_ptid (child_pid);
sprintf (child_pid_spelling, "%d", child_pid);
dont_repeat ();
/* If we're to be following both parent and child, then fork ourselves,
and attach the debugger clone to the child. */
- else if (STREQ (follow_mode, "both"))
+ else if (follow_mode == follow_fork_mode_both)
{
char pid_suffix[100]; /* Arbitrary length. */
/* We continue to follow the parent. To help distinguish the two
debuggers, though, both we and our clone will reset our prompts. */
- sprintf (pid_suffix, "[%d] ", inferior_pid);
+ sprintf (pid_suffix, "[%d] ", PIDGET (inferior_ptid));
set_prompt (strcat (get_prompt (), pid_suffix));
}
pending_follow.fork_event.saw_parent_fork = 0;
pending_follow.fork_event.saw_child_fork = 0;
-
- free (follow_mode);
}
static void
follow_inferior_fork (parent_pid, child_pid, 0, 1);
/* Did we follow the child? Had it exec'd before we saw the parent vfork? */
- if (pending_follow.fork_event.saw_child_exec && (inferior_pid == child_pid))
+ if (pending_follow.fork_event.saw_child_exec
+ && (PIDGET (inferior_ptid) == child_pid))
{
pending_follow.fork_event.saw_child_exec = 0;
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
- follow_exec (inferior_pid, pending_follow.execd_pathname);
- free (pending_follow.execd_pathname);
+ follow_exec (PIDGET (inferior_ptid), pending_follow.execd_pathname);
+ xfree (pending_follow.execd_pathname);
}
}
+/* EXECD_PATHNAME is assumed to be non-NULL. */
+
static void
follow_exec (int pid, char *execd_pathname)
{
(pending_follow.kind == TARGET_WAITKIND_VFORKED))
{
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
- follow_vfork (inferior_pid, pending_follow.fork_event.child_pid);
+ follow_vfork (PIDGET (inferior_ptid),
+ pending_follow.fork_event.child_pid);
follow_vfork_when_exec = 0;
- saved_pid = inferior_pid;
+ saved_pid = PIDGET (inferior_ptid);
/* Did we follow the parent? If so, we're done. If we followed
the child then we must also follow its exec(). */
- if (inferior_pid == pending_follow.fork_event.parent_pid)
+ if (PIDGET (inferior_ptid) == pending_follow.fork_event.parent_pid)
return;
}
gdb_flush (gdb_stdout);
target_mourn_inferior ();
- inferior_pid = saved_pid; /* Because mourn_inferior resets inferior_pid. */
+ inferior_ptid = pid_to_ptid (saved_pid);
+ /* Because mourn_inferior resets inferior_ptid. */
push_target (tgt);
/* That a.out is now the one to use. */
exec_file_attach (execd_pathname, 0);
/* And also is where symbols can be found. */
- symbol_file_command (execd_pathname, 0);
+ symbol_file_add_main (execd_pathname, 0);
/* Reset the shared library package. This ensures that we get
a shlib event when the child reaches "_start", at which point
SOLIB_RESTART ();
#endif
#ifdef SOLIB_CREATE_INFERIOR_HOOK
- SOLIB_CREATE_INFERIOR_HOOK (inferior_pid);
+ SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid));
#endif
/* Reinsert all breakpoints. (Those which were symbolic have
/* Things to clean up if we QUIT out of resume (). */
/* ARGSUSED */
static void
-resume_cleanups (int arg)
+resume_cleanups (void *ignore)
{
normal_stop ();
}
-static char schedlock_off[] = "off";
-static char schedlock_on[] = "on";
-static char schedlock_step[] = "step";
-static char *scheduler_mode = schedlock_off;
-static char *scheduler_enums[] =
-{schedlock_off, schedlock_on, schedlock_step};
+static const char schedlock_off[] = "off";
+static const char schedlock_on[] = "on";
+static const char schedlock_step[] = "step";
+static const char *scheduler_mode = schedlock_off;
+static const char *scheduler_enums[] =
+{
+ schedlock_off,
+ schedlock_on,
+ schedlock_step,
+ NULL
+};
static void
set_schedlock_func (char *args, int from_tty, struct cmd_list_element *c)
}
-
-
/* Resume the inferior, but allow a QUIT. This is useful if the user
wants to interrupt some lengthy single-stepping operation
(for child processes, the SIGINT goes to the inferior, and so
resume (int step, enum target_signal sig)
{
int should_resume = 1;
- struct cleanup *old_cleanups = make_cleanup ((make_cleanup_func)
- resume_cleanups, 0);
+ struct cleanup *old_cleanups = make_cleanup (resume_cleanups, 0);
QUIT;
-#ifdef CANNOT_STEP_BREAKPOINT
- /* Most targets can step a breakpoint instruction, thus executing it
- normally. But if this one cannot, just continue and we will hit
- it anyway. */
- if (step && breakpoints_inserted && breakpoint_here_p (read_pc ()))
- step = 0;
-#endif
+ /* FIXME: calling breakpoint_here_p (read_pc ()) three times! */
+
+
+ /* Some targets (e.g. Solaris x86) have a kernel bug when stepping
+ over an instruction that causes a page fault without triggering
+ a hardware watchpoint. The kernel properly notices that it shouldn't
+ stop, because the hardware watchpoint is not triggered, but it forgets
+ the step request and continues the program normally.
+ Work around the problem by removing hardware watchpoints if a step is
+ requested, GDB will check for a hardware watchpoint trigger after the
+ step anyway. */
+ if (CANNOT_STEP_HW_WATCHPOINTS && step && breakpoints_inserted)
+ remove_hw_watchpoints ();
+
/* Normally, by the time we reach `resume', the breakpoints are either
removed or inserted, as appropriate. The exception is if we're sitting
if (breakpoint_here_p (read_pc ()) == permanent_breakpoint_here)
SKIP_PERMANENT_BREAKPOINT ();
- if (SOFTWARE_SINGLE_STEP_P && step)
+ if (SOFTWARE_SINGLE_STEP_P () && step)
{
/* Do it the hard way, w/temp breakpoints */
SOFTWARE_SINGLE_STEP (sig, 1 /*insert-breakpoints */ );
{
case (TARGET_WAITKIND_FORKED):
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
- follow_fork (inferior_pid, pending_follow.fork_event.child_pid);
+ follow_fork (PIDGET (inferior_ptid),
+ pending_follow.fork_event.child_pid);
break;
case (TARGET_WAITKIND_VFORKED):
int saw_child_exec = pending_follow.fork_event.saw_child_exec;
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
- follow_vfork (inferior_pid, pending_follow.fork_event.child_pid);
+ follow_vfork (PIDGET (inferior_ptid),
+ pending_follow.fork_event.child_pid);
/* Did we follow the child, but not yet see the child's exec event?
If so, then it actually ought to be waiting for us; we respond to
parent vfork events. We don't actually want to resume the child
in this situation; we want to just get its exec event. */
if (!saw_child_exec &&
- (inferior_pid == pending_follow.fork_event.child_pid))
+ (PIDGET (inferior_ptid) == pending_follow.fork_event.child_pid))
should_resume = 0;
}
break;
if (should_resume)
{
- if (use_thread_step_needed && thread_step_needed)
- {
- /* We stopped on a BPT instruction;
- don't continue other threads and
- just step this thread. */
- thread_step_needed = 0;
+ ptid_t resume_ptid;
- if (!breakpoint_here_p (read_pc ()))
- {
- /* Breakpoint deleted: ok to do regular resume
- where all the threads either step or continue. */
- target_resume (-1, step, sig);
- }
- else
- {
- if (!step)
- {
- warning ("Internal error, changing continue to step.");
- remove_breakpoints ();
- breakpoints_inserted = 0;
- trap_expected = 1;
- step = 1;
- }
+ resume_ptid = RESUME_ALL; /* Default */
- target_resume (inferior_pid, step, sig);
- }
- }
- else
+ if ((step || singlestep_breakpoints_inserted_p) &&
+ !breakpoints_inserted && breakpoint_here_p (read_pc ()))
{
- /* Vanilla resume. */
+ /* Stepping past a breakpoint without inserting breakpoints.
+ Make sure only the current thread gets to step, so that
+ other threads don't sneak past breakpoints while they are
+ not inserted. */
- if ((scheduler_mode == schedlock_on) ||
- (scheduler_mode == schedlock_step && step != 0))
- target_resume (inferior_pid, step, sig);
- else
- target_resume (-1, step, sig);
+ resume_ptid = inferior_ptid;
+ }
+
+ if ((scheduler_mode == schedlock_on) ||
+ (scheduler_mode == schedlock_step &&
+ (step || singlestep_breakpoints_inserted_p)))
+ {
+ /* User-settable 'scheduler' mode requires solo thread resume. */
+ resume_ptid = inferior_ptid;
}
+
+#ifdef CANNOT_STEP_BREAKPOINT
+ /* Most targets can step a breakpoint instruction, thus executing it
+ normally. But if this one cannot, just continue and we will hit
+ it anyway. */
+ if (step && breakpoints_inserted && breakpoint_here_p (read_pc ()))
+ step = 0;
+#endif
+ target_resume (resume_ptid, step, sig);
}
discard_cleanups (old_cleanups);
step_range_start = 0;
step_range_end = 0;
step_frame_address = 0;
- step_over_calls = -1;
+ step_over_calls = STEP_OVER_UNDEBUGGABLE;
stop_after_trap = 0;
stop_soon_quietly = 0;
proceed_to_finish = 0;
if (step < 0)
stop_after_trap = 1;
- if (addr == (CORE_ADDR) - 1)
+ if (addr == (CORE_ADDR) -1)
{
/* If there is a breakpoint at the address we will resume at,
step one instruction before inserting breakpoints
else
{
write_pc (addr);
-
- /* New address; we don't need to single-step a thread
- over a breakpoint we just hit, 'cause we aren't
- continuing from there.
-
- It's not worth worrying about the case where a user
- asks for a "jump" at the current PC--if they get the
- hiccup of re-hiting a hit breakpoint, what else do
- they expect? */
- thread_step_needed = 0;
}
#ifdef PREPARE_TO_PROCEED
if (PREPARE_TO_PROCEED (1) && breakpoint_here_p (read_pc ()))
{
oneproc = 1;
- thread_step_needed = 1;
}
#endif /* PREPARE_TO_PROCEED */
int temp = insert_breakpoints ();
if (temp)
{
- print_sys_errmsg ("ptrace", temp);
+ print_sys_errmsg ("insert_breakpoints", temp);
error ("Cannot insert breakpoints.\n\
-The same program may be running in another process.");
+The same program may be running in another process,\n\
+or you may have requested too many hardware\n\
+breakpoints and/or watchpoints.\n");
}
breakpoints_inserted = 1;
and in any case decode why it stopped, and act accordingly. */
/* Do this only if we are not using the event loop, or if the target
does not support asynchronous execution. */
- if (!async_p || !target_has_async)
+ if (!event_loop_p || !target_can_async_p ())
{
wait_for_inferior ();
normal_stop ();
stop_soon_quietly = 1;
trap_expected = 0;
- /* Go on waiting only in case gdb is not started in async mode, or
- in case the target doesn't support async execution. */
- if (!async_p || !target_has_async)
- {
- wait_for_inferior ();
- normal_stop ();
- }
- else
- {
- /* The 'tar rem' command should always look synchronous,
- i.e. display the prompt only once it has connected and
- started the target. */
- sync_execution = 1;
- push_prompt ("", "", "");
- delete_file_handler (input_fd);
- target_executing = 1;
- }
+ /* Always go on waiting for the target, regardless of the mode. */
+ /* FIXME: cagney/1999-09-23: At present it isn't possible to
+ indicate to wait_for_inferior that a target should timeout if
+ nothing is returned (instead of just blocking). Because of this,
+ targets expecting an immediate response need to, internally, set
+ things up so that the target_wait() is forced to eventually
+ timeout. */
+ /* FIXME: cagney/1999-09-24: It isn't possible for target_open() to
+ differentiate to its caller what the state of the target is after
+ the initial open has been performed. Here we're assuming that
+ the target has stopped. It should be possible to eventually have
+ target_open() return to the caller an indication that the target
+ is currently running and GDB state should be set to the same as
+ for an async run. */
+ wait_for_inferior ();
+ normal_stop ();
}
/* Initialize static vars when a new inferior begins. */
infwait_nonstep_watch_state
};
+/* Why did the inferior stop? Used to print the appropriate messages
+ to the interface from within handle_inferior_event(). */
+enum inferior_stop_reason
+{
+ /* We don't know why. */
+ STOP_UNKNOWN,
+ /* Step, next, nexti, stepi finished. */
+ END_STEPPING_RANGE,
+ /* Found breakpoint. */
+ BREAKPOINT_HIT,
+ /* Inferior terminated by signal. */
+ SIGNAL_EXITED,
+ /* Inferior exited. */
+ EXITED,
+ /* Inferior received signal, and user asked to be notified. */
+ SIGNAL_RECEIVED
+};
+
/* This structure contains what used to be local variables in
wait_for_inferior. Probably many of them can return to being
locals in handle_inferior_event. */
int current_line;
struct symtab *current_symtab;
int handling_longjmp; /* FIXME */
- int pid;
- int saved_inferior_pid;
+ ptid_t ptid;
+ ptid_t saved_inferior_ptid;
int update_step_sp;
int stepping_through_solib_after_catch;
bpstat stepping_through_solib_catchpoints;
int new_thread_event;
struct target_waitstatus tmpstatus;
enum infwait_states infwait_state;
- int waiton_pid;
+ ptid_t waiton_ptid;
int wait_some_more;
};
static void stop_stepping (struct execution_control_state *ecs);
static void prepare_to_wait (struct execution_control_state *ecs);
static void keep_going (struct execution_control_state *ecs);
+static void print_stop_reason (enum inferior_stop_reason stop_reason, int stop_info);
/* Wait for control to return from inferior to debugger.
If inferior gets a signal, we may decide to start it up again
struct execution_control_state ecss;
struct execution_control_state *ecs;
- old_cleanups = make_cleanup (delete_breakpoint_current_contents,
+ old_cleanups = make_cleanup (delete_step_resume_breakpoint,
&step_resume_breakpoint);
make_cleanup (delete_breakpoint_current_contents,
&through_sigtramp_breakpoint);
/* Fill in with reasonable starting values. */
init_execution_control_state (ecs);
- thread_step_needed = 0;
-
/* We'll update this if & when we switch to a new thread. */
- if (may_switch_from_inferior_pid)
- switched_from_inferior_pid = inferior_pid;
+ previous_inferior_ptid = inferior_ptid;
overlay_cache_invalid = 1;
while (1)
{
if (target_wait_hook)
- ecs->pid = target_wait_hook (ecs->waiton_pid, ecs->wp);
+ ecs->ptid = target_wait_hook (ecs->waiton_ptid, ecs->wp);
else
- ecs->pid = target_wait (ecs->waiton_pid, ecs->wp);
+ ecs->ptid = target_wait (ecs->waiton_ptid, ecs->wp);
/* Now figure out what to do with the result of the result. */
handle_inferior_event (ecs);
struct execution_control_state *async_ecs;
void
-fetch_inferior_event (client_data)
- gdb_client_data client_data;
+fetch_inferior_event (void *client_data)
{
static struct cleanup *old_cleanups;
if (!async_ecs->wait_some_more)
{
- old_cleanups = make_exec_cleanup (delete_breakpoint_current_contents,
+ old_cleanups = make_exec_cleanup (delete_step_resume_breakpoint,
&step_resume_breakpoint);
make_exec_cleanup (delete_breakpoint_current_contents,
&through_sigtramp_breakpoint);
/* Fill in with reasonable starting values. */
init_execution_control_state (async_ecs);
- thread_step_needed = 0;
-
/* We'll update this if & when we switch to a new thread. */
- if (may_switch_from_inferior_pid)
- switched_from_inferior_pid = inferior_pid;
+ previous_inferior_ptid = inferior_ptid;
overlay_cache_invalid = 1;
}
if (target_wait_hook)
- async_ecs->pid = target_wait_hook (async_ecs->waiton_pid, async_ecs->wp);
+ async_ecs->ptid = target_wait_hook (async_ecs->waiton_ptid, async_ecs->wp);
else
- async_ecs->pid = target_wait (async_ecs->waiton_pid, async_ecs->wp);
+ async_ecs->ptid = target_wait (async_ecs->waiton_ptid, async_ecs->wp);
/* Now figure out what to do with the result of the result. */
handle_inferior_event (async_ecs);
if there are any. */
do_exec_cleanups (old_cleanups);
normal_stop ();
- /* Is there anything left to do for the command issued to
- complete? */
- do_all_continuations ();
- /* Reset things after target has stopped for the async commands. */
- complete_execution ();
+ if (step_multi && stop_step)
+ inferior_event_handler (INF_EXEC_CONTINUE, NULL);
+ else
+ inferior_event_handler (INF_EXEC_COMPLETE, NULL);
}
}
void
init_execution_control_state (struct execution_control_state *ecs)
{
+ /* ecs->another_trap? */
ecs->random_signal = 0;
ecs->remove_breakpoints_on_following_step = 0;
ecs->handling_longjmp = 0; /* FIXME */
ecs->current_line = ecs->sal.line;
ecs->current_symtab = ecs->sal.symtab;
ecs->infwait_state = infwait_normal_state;
- ecs->waiton_pid = -1;
+ ecs->waiton_ptid = pid_to_ptid (-1);
ecs->wp = &(ecs->ws);
}
warning ("GDB bug: infrun.c (wait_for_inferior): dropping old step_resume breakpoint");
}
+/* Return the cached copy of the last pid/waitstatus returned by
+ target_wait()/target_wait_hook(). The data is actually cached by
+ handle_inferior_event(), which gets called immediately after
+ target_wait()/target_wait_hook(). */
+
+void
+get_last_target_status(ptid_t *ptidp, struct target_waitstatus *status)
+{
+ *ptidp = target_last_wait_ptid;
+ *status = target_last_waitstatus;
+}
+
+/* Switch thread contexts, maintaining "infrun state". */
+
+static void
+context_switch (struct execution_control_state *ecs)
+{
+ /* Caution: it may happen that the new thread (or the old one!)
+ is not in the thread list. In this case we must not attempt
+ to "switch context", or we run the risk that our context may
+ be lost. This may happen as a result of the target module
+ mishandling thread creation. */
+
+ if (in_thread_list (inferior_ptid) && in_thread_list (ecs->ptid))
+ { /* Perform infrun state context switch: */
+ /* Save infrun state for the old thread. */
+ save_infrun_state (inferior_ptid, prev_pc,
+ prev_func_start, prev_func_name,
+ trap_expected, step_resume_breakpoint,
+ through_sigtramp_breakpoint, step_range_start,
+ step_range_end, step_frame_address,
+ ecs->handling_longjmp, ecs->another_trap,
+ ecs->stepping_through_solib_after_catch,
+ ecs->stepping_through_solib_catchpoints,
+ ecs->stepping_through_sigtramp,
+ ecs->current_line, ecs->current_symtab,
+ step_sp);
+
+ /* Load infrun state for the new thread. */
+ load_infrun_state (ecs->ptid, &prev_pc,
+ &prev_func_start, &prev_func_name,
+ &trap_expected, &step_resume_breakpoint,
+ &through_sigtramp_breakpoint, &step_range_start,
+ &step_range_end, &step_frame_address,
+ &ecs->handling_longjmp, &ecs->another_trap,
+ &ecs->stepping_through_solib_after_catch,
+ &ecs->stepping_through_solib_catchpoints,
+ &ecs->stepping_through_sigtramp,
+ &ecs->current_line, &ecs->current_symtab,
+ &step_sp);
+ }
+ inferior_ptid = ecs->ptid;
+}
+
+
/* Given an execution control state that has been freshly filled in
by an event from the inferior, figure out what it means and take
appropriate action. */
CORE_ADDR tmp;
int stepped_after_stopped_by_watchpoint;
+ /* Cache the last pid/waitstatus. */
+ target_last_wait_ptid = ecs->ptid;
+ target_last_waitstatus = *ecs->wp;
+
/* Keep this extra brace for now, minimizes diffs. */
{
switch (ecs->infwait_state)
{
- case infwait_normal_state:
- /* Since we've done a wait, we have a new event. Don't
- carry over any expectations about needing to step over a
- breakpoint. */
- thread_step_needed = 0;
+ case infwait_thread_hop_state:
+ /* Cancel the waiton_ptid. */
+ ecs->waiton_ptid = pid_to_ptid (-1);
+ /* Fall thru to the normal_state case. */
+ case infwait_normal_state:
/* See comments where a TARGET_WAITKIND_SYSCALL_RETURN event
is serviced in this loop, below. */
if (ecs->enable_hw_watchpoints_after_wait)
{
- TARGET_ENABLE_HW_WATCHPOINTS (inferior_pid);
+ TARGET_ENABLE_HW_WATCHPOINTS (PIDGET (inferior_ptid));
ecs->enable_hw_watchpoints_after_wait = 0;
}
stepped_after_stopped_by_watchpoint = 0;
break;
- case infwait_thread_hop_state:
- insert_breakpoints ();
-
- /* We need to restart all the threads now,
- * unles we're running in scheduler-locked mode.
- * FIXME: shouldn't we look at currently_stepping ()?
- */
- if (scheduler_mode == schedlock_on)
- target_resume (ecs->pid, 0, TARGET_SIGNAL_0);
- else
- target_resume (-1, 0, TARGET_SIGNAL_0);
- ecs->infwait_state = infwait_normal_state;
- prepare_to_wait (ecs);
- return;
-
case infwait_nullified_state:
break;
/* If it's a new process, add it to the thread database */
- ecs->new_thread_event = ((ecs->pid != inferior_pid) && !in_thread_list (ecs->pid));
+ ecs->new_thread_event = (! ptid_equal (ecs->ptid, inferior_ptid)
+ && ! in_thread_list (ecs->ptid));
if (ecs->ws.kind != TARGET_WAITKIND_EXITED
&& ecs->ws.kind != TARGET_WAITKIND_SIGNALLED
&& ecs->new_thread_event)
{
- add_thread (ecs->pid);
+ add_thread (ecs->ptid);
- printf_filtered ("[New %s]\n", target_pid_or_tid_to_str (ecs->pid));
+#ifdef UI_OUT
+ ui_out_text (uiout, "[New ");
+ ui_out_text (uiout, target_pid_or_tid_to_str (ecs->ptid));
+ ui_out_text (uiout, "]\n");
+#else
+ printf_filtered ("[New %s]\n", target_pid_or_tid_to_str (ecs->ptid));
+#endif
#if 0
/* NOTE: This block is ONLY meant to be invoked in case of a
Therefore we need to continue all threads in order to
make progress. */
- target_resume (-1, 0, TARGET_SIGNAL_0);
+ target_resume (RESUME_ALL, 0, TARGET_SIGNAL_0);
prepare_to_wait (ecs);
return;
#endif
case TARGET_WAITKIND_EXITED:
target_terminal_ours (); /* Must do this before mourn anyway */
- annotate_exited (ecs->ws.value.integer);
- if (ecs->ws.value.integer)
- printf_filtered ("\nProgram exited with code 0%o.\n",
- (unsigned int) ecs->ws.value.integer);
- else
- printf_filtered ("\nProgram exited normally.\n");
+ print_stop_reason (EXITED, ecs->ws.value.integer);
/* Record the exit code in the convenience variable $_exitcode, so
that the user can inspect this again later. */
(LONGEST) ecs->ws.value.integer));
gdb_flush (gdb_stdout);
target_mourn_inferior ();
- singlestep_breakpoints_inserted_p = 0; /*SOFTWARE_SINGLE_STEP_P */
+ singlestep_breakpoints_inserted_p = 0; /*SOFTWARE_SINGLE_STEP_P() */
stop_print_frame = 0;
stop_stepping (ecs);
return;
stop_print_frame = 0;
stop_signal = ecs->ws.value.sig;
target_terminal_ours (); /* Must do this before mourn anyway */
- annotate_signalled ();
-
- /* This looks pretty bogus to me. Doesn't TARGET_WAITKIND_SIGNALLED
- mean it is already dead? This has been here since GDB 2.8, so
- perhaps it means rms didn't understand unix waitstatuses?
- For the moment I'm just kludging around this in remote.c
- rather than trying to change it here --kingdon, 5 Dec 1994. */
- target_kill (); /* kill mourns as well */
-
- printf_filtered ("\nProgram terminated with signal ");
- annotate_signal_name ();
- printf_filtered ("%s", target_signal_to_name (stop_signal));
- annotate_signal_name_end ();
- printf_filtered (", ");
- annotate_signal_string ();
- printf_filtered ("%s", target_signal_to_string (stop_signal));
- annotate_signal_string_end ();
- printf_filtered (".\n");
-
- printf_filtered ("The program no longer exists.\n");
- gdb_flush (gdb_stdout);
- singlestep_breakpoints_inserted_p = 0; /*SOFTWARE_SINGLE_STEP_P */
+
+ /* Note: By definition of TARGET_WAITKIND_SIGNALLED, we shouldn't
+ reach here unless the inferior is dead. However, for years
+ target_kill() was called here, which hints that fatal signals aren't
+ really fatal on some systems. If that's true, then some changes
+ may be needed. */
+ target_mourn_inferior ();
+
+ print_stop_reason (SIGNAL_EXITED, stop_signal);
+ singlestep_breakpoints_inserted_p = 0; /*SOFTWARE_SINGLE_STEP_P() */
stop_stepping (ecs);
return;
interested in reacting to forks of the child. Note that
we expect the child's fork event to be available if we
waited for it now. */
- if (inferior_pid == ecs->pid)
+ if (ptid_equal (inferior_ptid, ecs->ptid))
{
pending_follow.fork_event.saw_parent_fork = 1;
- pending_follow.fork_event.parent_pid = ecs->pid;
+ pending_follow.fork_event.parent_pid = PIDGET (ecs->ptid);
pending_follow.fork_event.child_pid = ecs->ws.value.related_pid;
prepare_to_wait (ecs);
return;
else
{
pending_follow.fork_event.saw_child_fork = 1;
- pending_follow.fork_event.child_pid = ecs->pid;
+ pending_follow.fork_event.child_pid = PIDGET (ecs->ptid);
pending_follow.fork_event.parent_pid = ecs->ws.value.related_pid;
}
- stop_pc = read_pc_pid (ecs->pid);
- ecs->saved_inferior_pid = inferior_pid;
- inferior_pid = ecs->pid;
- stop_bpstat = bpstat_stop_status
- (&stop_pc,
- (DECR_PC_AFTER_BREAK ?
- (prev_pc != stop_pc - DECR_PC_AFTER_BREAK
- && currently_stepping (ecs))
- : 0)
- );
+ stop_pc = read_pc_pid (ecs->ptid);
+ ecs->saved_inferior_ptid = inferior_ptid;
+ inferior_ptid = ecs->ptid;
+ /* The second argument of bpstat_stop_status is meant to help
+ distinguish between a breakpoint trap and a singlestep trap.
+ This is only important on targets where DECR_PC_AFTER_BREAK
+ is non-zero. The prev_pc test is meant to distinguish between
+ singlestepping a trap instruction, and singlestepping thru a
+ jump to the instruction following a trap instruction. */
+
+ stop_bpstat = bpstat_stop_status (&stop_pc,
+ currently_stepping (ecs) &&
+ prev_pc !=
+ stop_pc - DECR_PC_AFTER_BREAK);
ecs->random_signal = !bpstat_explains_signal (stop_bpstat);
- inferior_pid = ecs->saved_inferior_pid;
+ inferior_ptid = ecs->saved_inferior_ptid;
goto process_event_stop_test;
/* If this a platform which doesn't allow a debugger to touch a
it execs, and the child has not yet exec'd. We probably
should warn the user to that effect when the catchpoint
triggers...) */
- if (ecs->pid == inferior_pid)
+ if (ptid_equal (ecs->ptid, inferior_ptid))
{
pending_follow.fork_event.saw_parent_fork = 1;
- pending_follow.fork_event.parent_pid = ecs->pid;
+ pending_follow.fork_event.parent_pid = PIDGET (ecs->ptid);
pending_follow.fork_event.child_pid = ecs->ws.value.related_pid;
}
else
{
pending_follow.fork_event.saw_child_fork = 1;
- pending_follow.fork_event.child_pid = ecs->pid;
+ pending_follow.fork_event.child_pid = PIDGET (ecs->ptid);
pending_follow.fork_event.parent_pid = ecs->ws.value.related_pid;
- target_post_startup_inferior (pending_follow.fork_event.child_pid);
+ target_post_startup_inferior (
+ pid_to_ptid (pending_follow.fork_event.child_pid));
follow_vfork_when_exec = !target_can_follow_vfork_prior_to_exec ();
if (follow_vfork_when_exec)
{
- target_resume (ecs->pid, 0, TARGET_SIGNAL_0);
+ target_resume (ecs->ptid, 0, TARGET_SIGNAL_0);
prepare_to_wait (ecs);
return;
}
}
stop_pc = read_pc ();
- stop_bpstat = bpstat_stop_status
- (&stop_pc,
- (DECR_PC_AFTER_BREAK ?
- (prev_pc != stop_pc - DECR_PC_AFTER_BREAK
- && currently_stepping (ecs))
- : 0)
- );
+ /* The second argument of bpstat_stop_status is meant to help
+ distinguish between a breakpoint trap and a singlestep trap.
+ This is only important on targets where DECR_PC_AFTER_BREAK
+ is non-zero. The prev_pc test is meant to distinguish between
+ singlestepping a trap instruction, and singlestepping thru a
+ jump to the instruction following a trap instruction. */
+
+ stop_bpstat = bpstat_stop_status (&stop_pc,
+ currently_stepping (ecs) &&
+ prev_pc !=
+ stop_pc - DECR_PC_AFTER_BREAK);
ecs->random_signal = !bpstat_explains_signal (stop_bpstat);
goto process_event_stop_test;
inferior_ignoring_leading_exec_events--;
if (pending_follow.kind == TARGET_WAITKIND_VFORKED)
ENSURE_VFORKING_PARENT_REMAINS_STOPPED (pending_follow.fork_event.parent_pid);
- target_resume (ecs->pid, 0, TARGET_SIGNAL_0);
+ target_resume (ecs->ptid, 0, TARGET_SIGNAL_0);
prepare_to_wait (ecs);
return;
}
savestring (ecs->ws.value.execd_pathname,
strlen (ecs->ws.value.execd_pathname));
- /* Did inferior_pid exec, or did a (possibly not-yet-followed)
+ /* Did inferior_ptid exec, or did a (possibly not-yet-followed)
child of a vfork exec?
??rehrauer: This is unabashedly an HP-UX specific thing. On
the parent vfork event is delivered. A single-step
suffices. */
if (RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK ())
- target_resume (ecs->pid, 1, TARGET_SIGNAL_0);
+ target_resume (ecs->ptid, 1, TARGET_SIGNAL_0);
/* We expect the parent vfork event to be available now. */
prepare_to_wait (ecs);
return;
/* This causes the eventpoints and symbol table to be reset. Must
do this now, before trying to determine whether to stop. */
- follow_exec (inferior_pid, pending_follow.execd_pathname);
- free (pending_follow.execd_pathname);
-
- stop_pc = read_pc_pid (ecs->pid);
- ecs->saved_inferior_pid = inferior_pid;
- inferior_pid = ecs->pid;
- stop_bpstat = bpstat_stop_status
- (&stop_pc,
- (DECR_PC_AFTER_BREAK ?
- (prev_pc != stop_pc - DECR_PC_AFTER_BREAK
- && currently_stepping (ecs))
- : 0)
- );
+ follow_exec (PIDGET (inferior_ptid), pending_follow.execd_pathname);
+ xfree (pending_follow.execd_pathname);
+
+ stop_pc = read_pc_pid (ecs->ptid);
+ ecs->saved_inferior_ptid = inferior_ptid;
+ inferior_ptid = ecs->ptid;
+ /* The second argument of bpstat_stop_status is meant to help
+ distinguish between a breakpoint trap and a singlestep trap.
+ This is only important on targets where DECR_PC_AFTER_BREAK
+ is non-zero. The prev_pc test is meant to distinguish between
+ singlestepping a trap instruction, and singlestepping thru a
+ jump to the instruction following a trap instruction. */
+
+ stop_bpstat = bpstat_stop_status (&stop_pc,
+ currently_stepping (ecs) &&
+ prev_pc !=
+ stop_pc - DECR_PC_AFTER_BREAK);
ecs->random_signal = !bpstat_explains_signal (stop_bpstat);
- inferior_pid = ecs->saved_inferior_pid;
+ inferior_ptid = ecs->saved_inferior_ptid;
goto process_event_stop_test;
/* These syscall events are returned on HP-UX, as part of its
number_of_threads_in_syscalls++;
if (number_of_threads_in_syscalls == 1)
{
- TARGET_DISABLE_HW_WATCHPOINTS (inferior_pid);
+ TARGET_DISABLE_HW_WATCHPOINTS (PIDGET (inferior_ptid));
}
resume (0, TARGET_SIGNAL_0);
prepare_to_wait (ecs);
here, which will be serviced immediately after the target
is waited on. */
case TARGET_WAITKIND_SYSCALL_RETURN:
- target_resume (ecs->pid, 1, TARGET_SIGNAL_0);
+ target_resume (ecs->ptid, 1, TARGET_SIGNAL_0);
if (number_of_threads_in_syscalls > 0)
{
case TARGET_WAITKIND_STOPPED:
stop_signal = ecs->ws.value.sig;
break;
+
+ /* We had an event in the inferior, but we are not interested
+ in handling it at this level. The lower layers have already
+ done what needs to be done, if anything. This case can
+ occur only when the target is async or extended-async. One
+ of the circumstamces for this to happen is when the
+ inferior produces output for the console. The inferior has
+ not stopped, and we are ignoring the event. */
+ case TARGET_WAITKIND_IGNORE:
+ ecs->wait_some_more = 1;
+ return;
}
/* We may want to consider not doing a resume here in order to give
all threads in order to make progress. */
if (ecs->new_thread_event)
{
- target_resume (-1, 0, TARGET_SIGNAL_0);
+ target_resume (RESUME_ALL, 0, TARGET_SIGNAL_0);
prepare_to_wait (ecs);
return;
}
- stop_pc = read_pc_pid (ecs->pid);
+ stop_pc = read_pc_pid (ecs->ptid);
/* See if a thread hit a thread-specific breakpoint that was meant for
another thread. If so, then step that thread past the breakpoint,
if (stop_signal == TARGET_SIGNAL_TRAP)
{
- if (SOFTWARE_SINGLE_STEP_P && singlestep_breakpoints_inserted_p)
+ if (SOFTWARE_SINGLE_STEP_P () && singlestep_breakpoints_inserted_p)
ecs->random_signal = 0;
else if (breakpoints_inserted
&& breakpoint_here_p (stop_pc - DECR_PC_AFTER_BREAK))
{
ecs->random_signal = 0;
if (!breakpoint_thread_match (stop_pc - DECR_PC_AFTER_BREAK,
- ecs->pid))
+ ecs->ptid))
{
int remove_status;
/* Saw a breakpoint, but it was hit by the wrong thread.
Just continue. */
- write_pc_pid (stop_pc - DECR_PC_AFTER_BREAK, ecs->pid);
+ if (DECR_PC_AFTER_BREAK)
+ write_pc_pid (stop_pc - DECR_PC_AFTER_BREAK, ecs->ptid);
remove_status = remove_breakpoints ();
/* Did we fail to remove breakpoints? If so, try
then either :-) or execs. */
if (remove_status != 0)
{
- write_pc_pid (stop_pc - DECR_PC_AFTER_BREAK + 4, ecs->pid);
+ /* FIXME! This is obviously non-portable! */
+ write_pc_pid (stop_pc - DECR_PC_AFTER_BREAK + 4,
+ ecs->ptid);
+ /* We need to restart all the threads now,
+ * unles we're running in scheduler-locked mode.
+ * Use currently_stepping to determine whether to
+ * step or continue.
+ */
+ /* FIXME MVS: is there any reason not to call resume()? */
+ if (scheduler_mode == schedlock_on)
+ target_resume (ecs->ptid,
+ currently_stepping (ecs),
+ TARGET_SIGNAL_0);
+ else
+ target_resume (RESUME_ALL,
+ currently_stepping (ecs),
+ TARGET_SIGNAL_0);
+ prepare_to_wait (ecs);
+ return;
}
else
{ /* Single step */
- target_resume (ecs->pid, 1, TARGET_SIGNAL_0);
- /* FIXME: What if a signal arrives instead of the
- single-step happening? */
-
- ecs->waiton_pid = ecs->pid;
+ breakpoints_inserted = 0;
+ if (!ptid_equal (inferior_ptid, ecs->ptid))
+ context_switch (ecs);
+ ecs->waiton_ptid = ecs->ptid;
ecs->wp = &(ecs->ws);
+ ecs->another_trap = 1;
+
ecs->infwait_state = infwait_thread_hop_state;
- prepare_to_wait (ecs);
+ keep_going (ecs);
+ registers_changed ();
return;
}
-
- /* We need to restart all the threads now,
- * unles we're running in scheduler-locked mode.
- * FIXME: shouldn't we look at currently_stepping ()?
- */
- if (scheduler_mode == schedlock_on)
- target_resume (ecs->pid, 0, TARGET_SIGNAL_0);
- else
- target_resume (-1, 0, TARGET_SIGNAL_0);
- prepare_to_wait (ecs);
- return;
- }
- else
- {
- /* This breakpoint matches--either it is the right
- thread or it's a generic breakpoint for all threads.
- Remember that we'll need to step just _this_ thread
- on any following user continuation! */
- thread_step_needed = 1;
}
}
}
Note that if there's any kind of pending follow (i.e., of a fork,
vfork or exec), we don't want to do this now. Rather, we'll let
the next resume handle it. */
- if ((ecs->pid != inferior_pid) &&
+ if (! ptid_equal (ecs->ptid, inferior_ptid) &&
(pending_follow.kind == TARGET_WAITKIND_SPURIOUS))
{
int printed = 0;
if (signal_program[stop_signal] == 0)
stop_signal = TARGET_SIGNAL_0;
- target_resume (ecs->pid, 0, stop_signal);
+ target_resume (ecs->ptid, 0, stop_signal);
prepare_to_wait (ecs);
return;
}
/* It's a SIGTRAP or a signal we're interested in. Switch threads,
and fall into the rest of wait_for_inferior(). */
- /* Save infrun state for the old thread. */
- save_infrun_state (inferior_pid, prev_pc,
- prev_func_start, prev_func_name,
- trap_expected, step_resume_breakpoint,
- through_sigtramp_breakpoint,
- step_range_start, step_range_end,
- step_frame_address, ecs->handling_longjmp,
- ecs->another_trap,
- ecs->stepping_through_solib_after_catch,
- ecs->stepping_through_solib_catchpoints,
- ecs->stepping_through_sigtramp);
-
- if (may_switch_from_inferior_pid)
- switched_from_inferior_pid = inferior_pid;
-
- inferior_pid = ecs->pid;
-
- /* Load infrun state for the new thread. */
- load_infrun_state (inferior_pid, &prev_pc,
- &prev_func_start, &prev_func_name,
- &trap_expected, &step_resume_breakpoint,
- &through_sigtramp_breakpoint,
- &step_range_start, &step_range_end,
- &step_frame_address, &ecs->handling_longjmp,
- &ecs->another_trap,
- &ecs->stepping_through_solib_after_catch,
- &ecs->stepping_through_solib_catchpoints,
- &ecs->stepping_through_sigtramp);
+ context_switch (ecs);
if (context_hook)
- context_hook (pid_to_thread_id (ecs->pid));
+ context_hook (pid_to_thread_id (ecs->ptid));
- printf_filtered ("[Switching to %s]\n", target_pid_to_str (ecs->pid));
flush_cached_frames ();
}
- if (SOFTWARE_SINGLE_STEP_P && singlestep_breakpoints_inserted_p)
+ if (SOFTWARE_SINGLE_STEP_P () && singlestep_breakpoints_inserted_p)
{
/* Pull the single step breakpoints out of the target. */
SOFTWARE_SINGLE_STEP (0, 0);
if (INSTRUCTION_NULLIFIED)
{
registers_changed ();
- target_resume (ecs->pid, 1, TARGET_SIGNAL_0);
+ target_resume (ecs->ptid, 1, TARGET_SIGNAL_0);
/* We may have received a signal that we want to pass to
the inferior; therefore, we must not clobber the waitstatus
in WS. */
ecs->infwait_state = infwait_nullified_state;
- ecs->waiton_pid = ecs->pid;
+ ecs->waiton_ptid = ecs->ptid;
ecs->wp = &(ecs->tmpstatus);
prepare_to_wait (ecs);
return;
includes evaluating watchpoints, things will come to a
stop in the correct manner. */
- write_pc (stop_pc - DECR_PC_AFTER_BREAK);
+ if (DECR_PC_AFTER_BREAK)
+ write_pc (stop_pc - DECR_PC_AFTER_BREAK);
remove_breakpoints ();
registers_changed ();
- target_resume (ecs->pid, 1, TARGET_SIGNAL_0); /* Single step */
+ target_resume (ecs->ptid, 1, TARGET_SIGNAL_0); /* Single step */
- ecs->waiton_pid = ecs->pid;
+ ecs->waiton_ptid = ecs->ptid;
ecs->wp = &(ecs->ws);
ecs->infwait_state = infwait_nonstep_watch_state;
prepare_to_wait (ecs);
else
{
/* See if there is a breakpoint at the current PC. */
+
+ /* The second argument of bpstat_stop_status is meant to help
+ distinguish between a breakpoint trap and a singlestep trap.
+ This is only important on targets where DECR_PC_AFTER_BREAK
+ is non-zero. The prev_pc test is meant to distinguish between
+ singlestepping a trap instruction, and singlestepping thru a
+ jump to the instruction following a trap instruction. */
+
stop_bpstat = bpstat_stop_status
(&stop_pc,
- (DECR_PC_AFTER_BREAK ?
- /* Notice the case of stepping through a jump
- that lands just after a breakpoint.
- Don't confuse that with hitting the breakpoint.
- What we check for is that 1) stepping is going on
- and 2) the pc before the last insn does not match
- the address of the breakpoint before the current pc
- and 3) we didn't hit a breakpoint in a signal handler
- without an intervening stop in sigtramp, which is
- detected by a new stack pointer value below
- any usual function calling stack adjustments. */
+ /* Pass TRUE if our reason for stopping is something other
+ than hitting a breakpoint. We do this by checking that
+ 1) stepping is going on and 2) we didn't hit a breakpoint
+ in a signal handler without an intervening stop in
+ sigtramp, which is detected by a new stack pointer value
+ below any usual function calling stack adjustments. */
(currently_stepping (ecs)
&& prev_pc != stop_pc - DECR_PC_AFTER_BREAK
&& !(step_range_end
- && INNER_THAN (read_sp (), (step_sp - 16)))) :
- 0)
+ && INNER_THAN (read_sp (), (step_sp - 16))))
);
/* Following in case break condition called a
function. */
{
printed = 1;
target_terminal_ours_for_output ();
- annotate_signal ();
- printf_filtered ("\nProgram received signal ");
- annotate_signal_name ();
- printf_filtered ("%s", target_signal_to_name (stop_signal));
- annotate_signal_name_end ();
- printf_filtered (", ");
- annotate_signal_string ();
- printf_filtered ("%s", target_signal_to_string (stop_signal));
- annotate_signal_string_end ();
- printf_filtered (".\n");
- gdb_flush (gdb_stdout);
+ print_stop_reason (SIGNAL_RECEIVED, stop_signal);
}
if (signal_stop[stop_signal])
{
the HP-UX maintainer to furnish a fix that doesn't break other
platforms. --JimB, 20 May 1999 */
check_sigtramp2 (ecs);
+ keep_going (ecs);
+ return;
}
/* Handle cases caused by hitting a breakpoint. */
interferes with us */
if (step_resume_breakpoint != NULL)
{
- delete_breakpoint (step_resume_breakpoint);
- step_resume_breakpoint = NULL;
+ delete_step_resume_breakpoint (&step_resume_breakpoint);
}
/* Not sure whether we need to blow this away too, but probably
it is like the step-resume breakpoint. */
case BPSTAT_WHAT_SINGLE:
if (breakpoints_inserted)
{
- thread_step_needed = 1;
remove_breakpoints ();
}
breakpoints_inserted = 0;
step_resume_breakpoint =
bpstat_find_step_resume_breakpoint (stop_bpstat);
}
- delete_breakpoint (step_resume_breakpoint);
- step_resume_breakpoint = NULL;
+ delete_step_resume_breakpoint (&step_resume_breakpoint);
break;
case BPSTAT_WHAT_THROUGH_SIGTRAMP:
dynamically loaded objects (among other things). */
if (stop_on_solib_events)
{
- stop_print_frame = 0;
stop_stepping (ecs);
return;
}
{
#if defined(SOLIB_ADD)
/* Have we reached our destination? If not, keep going. */
- if (SOLIB_IN_DYNAMIC_LINKER (ecs->pid, stop_pc))
+ if (SOLIB_IN_DYNAMIC_LINKER (PIDGET (ecs->ptid), stop_pc))
{
ecs->another_trap = 1;
keep_going (ecs);
loader dynamic symbol resolution code, we keep on single stepping
until we exit the run time loader code and reach the callee's
address. */
- if (step_over_calls < 0 && IN_SOLIB_DYNSYM_RESOLVE_CODE (stop_pc))
+ if (step_over_calls == STEP_OVER_UNDEBUGGABLE && IN_SOLIB_DYNSYM_RESOLVE_CODE (stop_pc))
{
CORE_ADDR pc_after_resolver = SKIP_SOLIB_RESOLVER (stop_pc);
{
/* It's a subroutine call. */
- if (step_over_calls == 0)
+ if ((step_over_calls == STEP_OVER_NONE)
+ || ((step_range_end == 1)
+ && in_prologue (prev_pc, ecs->stop_func_start)))
{
/* I presume that step_over_calls is only 0 when we're
supposed to be stepping at the assembly language level
("stepi"). Just stop. */
+ /* Also, maybe we just did a "nexti" inside a prolog,
+ so we thought it was a subroutine call but it was not.
+ Stop as well. FENN */
stop_step = 1;
+ print_stop_reason (END_STEPPING_RANGE, 0);
stop_stepping (ecs);
return;
}
- if (step_over_calls > 0 || IGNORE_HELPER_CALL (stop_pc))
+ if (step_over_calls == STEP_OVER_ALL || IGNORE_HELPER_CALL (stop_pc))
{
/* We're doing a "next". */
+
+ if (IN_SIGTRAMP (stop_pc, ecs->stop_func_name)
+ && INNER_THAN (step_frame_address, read_sp()))
+ /* We stepped out of a signal handler, and into its
+ calling trampoline. This is misdetected as a
+ subroutine call, but stepping over the signal
+ trampoline isn't such a bad idea. In order to do
+ that, we have to ignore the value in
+ step_frame_address, since that doesn't represent the
+ frame that'll reach when we return from the signal
+ trampoline. Otherwise we'll probably continue to the
+ end of the program. */
+ step_frame_address = 0;
+
step_over_function (ecs);
keep_going (ecs);
return;
return;
}
}
+
+ /* If we have no line number and the step-stop-if-no-debug
+ is set, we stop the step so that the user has a chance to
+ switch in assembly mode. */
+ if (step_over_calls == STEP_OVER_UNDEBUGGABLE && step_stop_if_no_debug)
+ {
+ stop_step = 1;
+ print_stop_reason (END_STEPPING_RANGE, 0);
+ stop_stepping (ecs);
+ return;
+ }
+
step_over_function (ecs);
keep_going (ecs);
return;
/* It is stepi or nexti. We always want to stop stepping after
one instruction. */
stop_step = 1;
+ print_stop_reason (END_STEPPING_RANGE, 0);
stop_stepping (ecs);
return;
}
when we do "s" in a function with no line numbers,
or can this happen as a result of a return or longjmp?). */
stop_step = 1;
+ print_stop_reason (END_STEPPING_RANGE, 0);
stop_stepping (ecs);
return;
}
That is said to make things like for (;;) statements work
better. */
stop_step = 1;
+ print_stop_reason (END_STEPPING_RANGE, 0);
stop_stepping (ecs);
return;
}
in which after skipping the prologue we better stop even though
we will be in mid-line. */
stop_step = 1;
+ print_stop_reason (END_STEPPING_RANGE, 0);
stop_stepping (ecs);
return;
}
{
/* We are already there: stop now. */
stop_step = 1;
+ print_stop_reason (END_STEPPING_RANGE, 0);
stop_stepping (ecs);
return;
}
step_resume_breakpoint =
set_momentary_breakpoint (sr_sal, get_current_frame (), bp_step_resume);
- if (!IN_SOLIB_DYNSYM_RESOLVE_CODE (sr_sal.pc))
+ if (step_frame_address && !IN_SOLIB_DYNSYM_RESOLVE_CODE (sr_sal.pc))
step_resume_breakpoint->frame = step_frame_address;
if (breakpoints_inserted)
{
/* Are we stopping for a vfork event? We only stop when we see
the child's event. However, we may not yet have seen the
- parent's event. And, inferior_pid is still set to the
+ parent's event. And, inferior_ptid is still set to the
parent's pid, until we resume again and follow either the
parent or child.
- To ensure that we can really touch inferior_pid (aka, the
+ To ensure that we can really touch inferior_ptid (aka, the
parent process) -- which calls to functions like read_pc
implicitly do -- wait on the parent if necessary. */
if ((pending_follow.kind == TARGET_WAITKIND_VFORKED)
&& !pending_follow.fork_event.saw_parent_fork)
{
- int parent_pid;
+ ptid_t parent_ptid;
do
{
if (target_wait_hook)
- parent_pid = target_wait_hook (-1, &(ecs->ws));
+ parent_ptid = target_wait_hook (pid_to_ptid (-1), &(ecs->ws));
else
- parent_pid = target_wait (-1, &(ecs->ws));
+ parent_ptid = target_wait (pid_to_ptid (-1), &(ecs->ws));
}
- while (parent_pid != inferior_pid);
+ while (! ptid_equal (parent_ptid, inferior_ptid));
}
/* Assuming the inferior still exists, set these up for next
as part of their normal status mechanism. */
registers_changed ();
- ecs->waiton_pid = -1;
+ ecs->waiton_ptid = pid_to_ptid (-1);
ecs->wp = &(ecs->ws);
}
/* This is the old end of the while loop. Let everybody know we
ecs->wait_some_more = 1;
}
-/* This function returns TRUE if ep is an internal breakpoint
- set to catch generic shared library (aka dynamically-linked
- library) events. (This is *NOT* the same as a catchpoint for a
- shlib event. The latter is something a user can set; this is
- something gdb sets for its own use, and isn't ever shown to a
- user.) */
-static int
-is_internal_shlib_eventpoint (struct breakpoint *ep)
-{
- return
- (ep->type == bp_shlib_event)
- ;
-}
-
-/* This function returns TRUE if bs indicates that the inferior
- stopped due to a shared library (aka dynamically-linked library)
- event. */
-
-static int
-stopped_for_internal_shlib_event (bpstat bs)
-{
- /* Note that multiple eventpoints may've caused the stop. Any
- that are associated with shlib events will be accepted. */
- for (; bs != NULL; bs = bs->next)
- {
- if ((bs->breakpoint_at != NULL)
- && is_internal_shlib_eventpoint (bs->breakpoint_at))
- return 1;
- }
-
- /* If we get here, then no candidate was found. */
- return 0;
-}
-\f
-/* Reset proper settings after an asynchronous command has finished.
- If the execution command was in synchronous mode, register stdin
- with the event loop, and reset the prompt. */
-
+/* Print why the inferior has stopped. We always print something when
+ the inferior exits, or receives a signal. The rest of the cases are
+ dealt with later on in normal_stop() and print_it_typical(). Ideally
+ there should be a call to this function from handle_inferior_event()
+ each time stop_stepping() is called.*/
static void
-complete_execution (void)
+print_stop_reason (enum inferior_stop_reason stop_reason, int stop_info)
{
- target_executing = 0;
- if (sync_execution)
+ switch (stop_reason)
{
- add_file_handler (input_fd, stdin_event_handler, 0);
- pop_prompt ();
- sync_execution = 0;
- cleanup_sigint_signal_handler ();
- display_gdb_prompt (0);
- }
- else
- {
- if (exec_done_display_p)
- printf_unfiltered ("completed.\n");
+ case STOP_UNKNOWN:
+ /* We don't deal with these cases from handle_inferior_event()
+ yet. */
+ break;
+ case END_STEPPING_RANGE:
+ /* We are done with a step/next/si/ni command. */
+ /* For now print nothing. */
+#ifdef UI_OUT
+ /* Print a message only if not in the middle of doing a "step n"
+ operation for n > 1 */
+ if (!step_multi || !stop_step)
+ if (ui_out_is_mi_like_p (uiout))
+ ui_out_field_string (uiout, "reason", "end-stepping-range");
+#endif
+ break;
+ case BREAKPOINT_HIT:
+ /* We found a breakpoint. */
+ /* For now print nothing. */
+ break;
+ case SIGNAL_EXITED:
+ /* The inferior was terminated by a signal. */
+#ifdef UI_OUT
+ annotate_signalled ();
+ if (ui_out_is_mi_like_p (uiout))
+ ui_out_field_string (uiout, "reason", "exited-signalled");
+ ui_out_text (uiout, "\nProgram terminated with signal ");
+ annotate_signal_name ();
+ ui_out_field_string (uiout, "signal-name", target_signal_to_name (stop_info));
+ annotate_signal_name_end ();
+ ui_out_text (uiout, ", ");
+ annotate_signal_string ();
+ ui_out_field_string (uiout, "signal-meaning", target_signal_to_string (stop_info));
+ annotate_signal_string_end ();
+ ui_out_text (uiout, ".\n");
+ ui_out_text (uiout, "The program no longer exists.\n");
+#else
+ annotate_signalled ();
+ printf_filtered ("\nProgram terminated with signal ");
+ annotate_signal_name ();
+ printf_filtered ("%s", target_signal_to_name (stop_info));
+ annotate_signal_name_end ();
+ printf_filtered (", ");
+ annotate_signal_string ();
+ printf_filtered ("%s", target_signal_to_string (stop_info));
+ annotate_signal_string_end ();
+ printf_filtered (".\n");
+
+ printf_filtered ("The program no longer exists.\n");
+ gdb_flush (gdb_stdout);
+#endif
+ break;
+ case EXITED:
+ /* The inferior program is finished. */
+#ifdef UI_OUT
+ annotate_exited (stop_info);
+ if (stop_info)
+ {
+ if (ui_out_is_mi_like_p (uiout))
+ ui_out_field_string (uiout, "reason", "exited");
+ ui_out_text (uiout, "\nProgram exited with code ");
+ ui_out_field_fmt (uiout, "exit-code", "0%o", (unsigned int) stop_info);
+ ui_out_text (uiout, ".\n");
+ }
+ else
+ {
+ if (ui_out_is_mi_like_p (uiout))
+ ui_out_field_string (uiout, "reason", "exited-normally");
+ ui_out_text (uiout, "\nProgram exited normally.\n");
+ }
+#else
+ annotate_exited (stop_info);
+ if (stop_info)
+ printf_filtered ("\nProgram exited with code 0%o.\n",
+ (unsigned int) stop_info);
+ else
+ printf_filtered ("\nProgram exited normally.\n");
+#endif
+ break;
+ case SIGNAL_RECEIVED:
+ /* Signal received. The signal table tells us to print about
+ it. */
+#ifdef UI_OUT
+ annotate_signal ();
+ ui_out_text (uiout, "\nProgram received signal ");
+ annotate_signal_name ();
+ if (ui_out_is_mi_like_p (uiout))
+ ui_out_field_string (uiout, "reason", "signal-received");
+ ui_out_field_string (uiout, "signal-name", target_signal_to_name (stop_info));
+ annotate_signal_name_end ();
+ ui_out_text (uiout, ", ");
+ annotate_signal_string ();
+ ui_out_field_string (uiout, "signal-meaning", target_signal_to_string (stop_info));
+ annotate_signal_string_end ();
+ ui_out_text (uiout, ".\n");
+#else
+ annotate_signal ();
+ printf_filtered ("\nProgram received signal ");
+ annotate_signal_name ();
+ printf_filtered ("%s", target_signal_to_name (stop_info));
+ annotate_signal_name_end ();
+ printf_filtered (", ");
+ annotate_signal_string ();
+ printf_filtered ("%s", target_signal_to_string (stop_info));
+ annotate_signal_string_end ();
+ printf_filtered (".\n");
+ gdb_flush (gdb_stdout);
+#endif
+ break;
+ default:
+ internal_error (__FILE__, __LINE__,
+ "print_stop_reason: unrecognized enum value");
+ break;
}
}
+\f
/* Here to return control to GDB when the inferior stops for real.
Print appropriate messages, remove breakpoints, give terminal our modes.
(Note that there's no point in saying anything if the inferior
has exited!) */
- if (may_switch_from_inferior_pid
- && (switched_from_inferior_pid != inferior_pid)
+ if (! ptid_equal (previous_inferior_ptid, inferior_ptid)
&& target_has_execution)
{
target_terminal_ours_for_output ();
- printf_filtered ("[Switched to %s]\n",
- target_pid_or_tid_to_str (inferior_pid));
- switched_from_inferior_pid = inferior_pid;
+ printf_filtered ("[Switching to %s]\n",
+ target_pid_or_tid_to_str (inferior_ptid));
+ previous_inferior_ptid = inferior_ptid;
}
/* Make sure that the current_frame's pc is correct. This
if (breakpoints_failed)
{
target_terminal_ours_for_output ();
- print_sys_errmsg ("ptrace", breakpoints_failed);
+ print_sys_errmsg ("While inserting breakpoints", breakpoints_failed);
printf_filtered ("Stopped; cannot insert breakpoints.\n\
-The same program may be running in another process.\n");
+The same program may be running in another process,\n\
+or you may have requested too many hardware breakpoints\n\
+and/or watchpoints.\n");
}
if (target_has_execution && breakpoints_inserted)
target_terminal_ours ();
- /* Did we stop because the user set the stop_on_solib_events
- variable? (If so, we report this as a generic, "Stopped due
- to shlib event" message.) */
- if (stopped_for_internal_shlib_event (stop_bpstat))
- {
- printf_filtered ("Stopped due to shared library event\n");
- }
-
/* Look up the hook_stop and run it if it exists. */
- if (stop_command && stop_command->hook)
+ if (stop_command && stop_command->hook_pre)
{
- catch_errors (hook_stop_stub, stop_command->hook,
+ catch_errors (hook_stop_stub, stop_command->hook_pre,
"Error while running hook_stop:\n", RETURN_MASK_ALL);
}
bpstat_print() contains the logic deciding in detail
what to print, based on the event(s) that just occurred. */
- if (stop_print_frame)
+ if (stop_print_frame
+ && selected_frame)
{
int bpstat_ret;
int source_flag;
+ int do_frame_printing = 1;
bpstat_ret = bpstat_print (stop_bpstat);
- /* bpstat_print() returned one of:
- -1: Didn't print anything
- 0: Printed preliminary "Breakpoint n, " message, desires
- location tacked on
- 1: Printed something, don't tack on location */
-
- if (bpstat_ret == -1)
- if (stop_step
- && step_frame_address == FRAME_FP (get_current_frame ())
- && step_start_function == find_pc_function (stop_pc))
- source_flag = -1; /* finished step, just print source line */
- else
- source_flag = 1; /* print location and source line */
- else if (bpstat_ret == 0) /* hit bpt, desire location */
- source_flag = 1; /* print location and source line */
- else /* bpstat_ret == 1, hit bpt, do not desire location */
- source_flag = -1; /* just print source line */
+ switch (bpstat_ret)
+ {
+ case PRINT_UNKNOWN:
+ if (stop_step
+ && step_frame_address == FRAME_FP (get_current_frame ())
+ && step_start_function == find_pc_function (stop_pc))
+ source_flag = SRC_LINE; /* finished step, just print source line */
+ else
+ source_flag = SRC_AND_LOC; /* print location and source line */
+ break;
+ case PRINT_SRC_AND_LOC:
+ source_flag = SRC_AND_LOC; /* print location and source line */
+ break;
+ case PRINT_SRC_ONLY:
+ source_flag = SRC_LINE;
+ break;
+ case PRINT_NOTHING:
+ source_flag = SRC_LINE; /* something bogus */
+ do_frame_printing = 0;
+ break;
+ default:
+ internal_error (__FILE__, __LINE__,
+ "Unknown value.");
+ }
+#ifdef UI_OUT
+ /* For mi, have the same behavior every time we stop:
+ print everything but the source line. */
+ if (ui_out_is_mi_like_p (uiout))
+ source_flag = LOC_AND_ADDRESS;
+#endif
+#ifdef UI_OUT
+ if (ui_out_is_mi_like_p (uiout))
+ ui_out_field_int (uiout, "thread-id",
+ pid_to_thread_id (inferior_ptid));
+#endif
/* The behavior of this routine with respect to the source
flag is:
- -1: Print only source line
- 0: Print only location
- 1: Print location and source line */
- show_and_print_stack_frame (selected_frame, -1, source_flag);
+ SRC_LINE: Print only source line
+ LOCATION: Print only location
+ SRC_AND_LOC: Print location and source line */
+ if (do_frame_printing)
+ show_and_print_stack_frame (selected_frame, -1, source_flag);
/* Display the auto-display expressions. */
do_displays ();
select_frame (get_current_frame (), 0);
}
-
- TUIDO (((TuiOpaqueFuncPtr) tui_vCheckDataValues, selected_frame));
-
done:
annotate_stopped ();
}
argv++;
}
- target_notice_signals (inferior_pid);
+ target_notice_signals (inferior_ptid);
if (from_tty)
{
else
printf_filtered ("Invalid signal handling flag.\n");
if (argBuf)
- free (argBuf);
+ xfree (argBuf);
}
}
do_cleanups (old_chain);
{
/* No, try numeric. */
oursig =
- target_signal_from_command (parse_and_eval_address (signum_exp));
+ target_signal_from_command (parse_and_eval_long (signum_exp));
}
sig_print_info (oursig);
return;
CORE_ADDR step_range_start;
CORE_ADDR step_range_end;
CORE_ADDR step_frame_address;
- int step_over_calls;
+ enum step_over_calls_kind step_over_calls;
CORE_ADDR step_resume_break_address;
int stop_after_trap;
int stop_soon_quietly;
static void
free_inferior_status (struct inferior_status *inf_status)
{
- free (inf_status->registers);
- free (inf_status->stop_registers);
- free (inf_status);
+ xfree (inf_status->registers);
+ xfree (inf_status->stop_registers);
+ xfree (inf_status);
}
void
free_inferior_status (inf_status);
}
+static void
+do_restore_inferior_status_cleanup (void *sts)
+{
+ restore_inferior_status (sts);
+}
+
+struct cleanup *
+make_cleanup_restore_inferior_status (struct inferior_status *inf_status)
+{
+ return make_cleanup (do_restore_inferior_status_cleanup, inf_status);
+}
+
void
discard_inferior_status (struct inferior_status *inf_status)
{
free_inferior_status (inf_status);
}
+/* Oft used ptids */
+ptid_t null_ptid;
+ptid_t minus_one_ptid;
+
+/* Create a ptid given the necessary PID, LWP, and TID components. */
+
+ptid_t
+ptid_build (int pid, long lwp, long tid)
+{
+ ptid_t ptid;
+
+ ptid.pid = pid;
+ ptid.lwp = lwp;
+ ptid.tid = tid;
+ return ptid;
+}
+
+/* Create a ptid from just a pid. */
+
+ptid_t
+pid_to_ptid (int pid)
+{
+ return ptid_build (pid, 0, 0);
+}
+
+/* Fetch the pid (process id) component from a ptid. */
+
+int
+ptid_get_pid (ptid_t ptid)
+{
+ return ptid.pid;
+}
+
+/* Fetch the lwp (lightweight process) component from a ptid. */
+
+long
+ptid_get_lwp (ptid_t ptid)
+{
+ return ptid.lwp;
+}
+
+/* Fetch the tid (thread id) component from a ptid. */
+
+long
+ptid_get_tid (ptid_t ptid)
+{
+ return ptid.tid;
+}
+
+/* ptid_equal() is used to test equality of two ptids. */
+
+int
+ptid_equal (ptid_t ptid1, ptid_t ptid2)
+{
+ return (ptid1.pid == ptid2.pid && ptid1.lwp == ptid2.lwp
+ && ptid1.tid == ptid2.tid);
+}
+
+/* restore_inferior_ptid() will be used by the cleanup machinery
+ to restore the inferior_ptid value saved in a call to
+ save_inferior_ptid(). */
+
static void
-set_follow_fork_mode_command (char *arg, int from_tty,
- struct cmd_list_element *c)
+restore_inferior_ptid (void *arg)
+{
+ ptid_t *saved_ptid_ptr = arg;
+ inferior_ptid = *saved_ptid_ptr;
+ xfree (arg);
+}
+
+/* Save the value of inferior_ptid so that it may be restored by a
+ later call to do_cleanups(). Returns the struct cleanup pointer
+ needed for later doing the cleanup. */
+
+struct cleanup *
+save_inferior_ptid (void)
{
- if (!STREQ (arg, "parent") &&
- !STREQ (arg, "child") &&
- !STREQ (arg, "both") &&
- !STREQ (arg, "ask"))
- error ("follow-fork-mode must be one of \"parent\", \"child\", \"both\" or \"ask\".");
-
- if (follow_fork_mode_string != NULL)
- free (follow_fork_mode_string);
- follow_fork_mode_string = savestring (arg, strlen (arg));
+ ptid_t *saved_ptid_ptr;
+
+ saved_ptid_ptr = xmalloc (sizeof (ptid_t));
+ *saved_ptid_ptr = inferior_ptid;
+ return make_cleanup (restore_inferior_ptid, saved_ptid_ptr);
}
+
\f
static void
build_infrun (void)
c = add_set_enum_cmd ("follow-fork-mode",
class_run,
follow_fork_mode_kind_names,
- (char *) &follow_fork_mode_string,
+ &follow_fork_mode_string,
/* ??rehrauer: The "both" option is broken, by what may be a 10.20
kernel problem. It's also not terribly useful without a GUI to
help the user drive two debuggers. So for now, I'm disabling
/* c->function.sfunc = ; */
add_show_from_set (c, &showlist);
- set_follow_fork_mode_command ("parent", 0, NULL);
-
c = add_set_enum_cmd ("scheduler-locking", class_run,
scheduler_enums, /* array of string names */
- (char *) &scheduler_mode, /* current mode */
+ &scheduler_mode, /* current mode */
"Set mode for locking scheduler during execution.\n\
off == no locking (threads may preempt at any time)\n\
on == full locking (no thread except the current thread may run)\n\
c->function.sfunc = set_schedlock_func; /* traps on target vector */
add_show_from_set (c, &showlist);
+
+ c = add_set_cmd ("step-mode", class_run,
+ var_boolean, (char*) &step_stop_if_no_debug,
+"Set mode of the step operation. When set, doing a step over a\n\
+function without debug line information will stop at the first\n\
+instruction of that function. Otherwise, the function is skipped and\n\
+the step command stops at a different source line.",
+ &setlist);
+ add_show_from_set (c, &showlist);
+
+ /* ptid initializations */
+ null_ptid = ptid_build (0, 0, 0);
+ minus_one_ptid = ptid_build (-1, 0, 0);
+ inferior_ptid = null_ptid;
+ target_last_wait_ptid = minus_one_ptid;
}