Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
- 2008, 2009 Free Software Foundation, Inc.
+ 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
This file is part of GDB.
#include "language.h"
#include "solib.h"
#include "main.h"
+#include "dictionary.h"
+#include "block.h"
#include "gdb_assert.h"
#include "mi/mi-common.h"
#include "event-top.h"
#include "record.h"
#include "inline-frame.h"
#include "jit.h"
+#include "tracepoint.h"
/* Prototypes for local functions */
static int restore_selected_frame (void *);
-static void build_infrun (void);
-
static int follow_fork (void);
static void set_schedlock_func (char *args, int from_tty,
static int prepare_to_proceed (int);
+static void print_exited_reason (int exitstatus);
+
+static void print_signal_exited_reason (enum target_signal siggnal);
+
+static void print_no_history_reason (void);
+
+static void print_signal_received_reason (enum target_signal siggnal);
+
+static void print_end_stepping_range_reason (void);
+
void _initialize_infrun (void);
void nullify_last_target_wait_ptid (void);
+static void insert_step_resume_breakpoint_at_frame (struct frame_info *);
+
+static void insert_step_resume_breakpoint_at_caller (struct frame_info *);
+
+static void insert_step_resume_breakpoint_at_sal (struct gdbarch *,
+ struct symtab_and_line ,
+ struct frame_id);
+
+static void insert_longjmp_resume_breakpoint (struct gdbarch *, CORE_ADDR);
+
/* 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. */
fprintf_filtered (file, _("Mode of the step operation is %s.\n"), value);
}
-/* In asynchronous mode, but simulating synchronous execution. */
+/* In asynchronous mode, but simulating synchronous execution. */
int sync_execution = 0;
fprintf_filtered (file, _("Displace stepping debugging is %s.\n"), value);
}
-static int debug_infrun = 0;
+int debug_infrun = 0;
static void
show_debug_infrun (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
#define SOLIB_IN_DYNAMIC_LINKER(pid,pc) 0
#endif
+/* "Observer mode" is somewhat like a more extreme version of
+ non-stop, in which all GDB operations that might affect the
+ target's execution have been disabled. */
-/* Convert the #defines into values. This is temporary until wfi control
- flow is completely sorted out. */
+static int non_stop_1 = 0;
-#ifndef CANNOT_STEP_HW_WATCHPOINTS
-#define CANNOT_STEP_HW_WATCHPOINTS 0
-#else
-#undef CANNOT_STEP_HW_WATCHPOINTS
-#define CANNOT_STEP_HW_WATCHPOINTS 1
-#endif
+int observer_mode = 0;
+static int observer_mode_1 = 0;
+
+static void
+set_observer_mode (char *args, int from_tty,
+ struct cmd_list_element *c)
+{
+ extern int pagination_enabled;
+
+ if (target_has_execution)
+ {
+ observer_mode_1 = observer_mode;
+ error (_("Cannot change this setting while the inferior is running."));
+ }
+
+ observer_mode = observer_mode_1;
+
+ may_write_registers = !observer_mode;
+ may_write_memory = !observer_mode;
+ may_insert_breakpoints = !observer_mode;
+ may_insert_tracepoints = !observer_mode;
+ /* We can insert fast tracepoints in or out of observer mode,
+ but enable them if we're going into this mode. */
+ if (observer_mode)
+ may_insert_fast_tracepoints = 1;
+ may_stop = !observer_mode;
+ update_target_permissions ();
+
+ /* Going *into* observer mode we must force non-stop, then
+ going out we leave it that way. */
+ if (observer_mode)
+ {
+ target_async_permitted = 1;
+ pagination_enabled = 0;
+ non_stop = non_stop_1 = 1;
+ }
+
+ if (from_tty)
+ printf_filtered (_("Observer mode is now %s.\n"),
+ (observer_mode ? "on" : "off"));
+}
+
+static void
+show_observer_mode (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file, _("Observer mode is %s.\n"), value);
+}
+
+/* This updates the value of observer mode based on changes in
+ permissions. Note that we are deliberately ignoring the values of
+ may-write-registers and may-write-memory, since the user may have
+ reason to enable these during a session, for instance to turn on a
+ debugging-related global. */
+
+void
+update_observer_mode (void)
+{
+ int newval;
+
+ newval = (!may_insert_breakpoints
+ && !may_insert_tracepoints
+ && may_insert_fast_tracepoints
+ && !may_stop
+ && non_stop);
+
+ /* Let the user know if things change. */
+ if (newval != observer_mode)
+ printf_filtered (_("Observer mode is now %s.\n"),
+ (newval ? "on" : "off"));
+
+ observer_mode = observer_mode_1 = newval;
+}
/* Tables of how to react to signals; the user sets them. */
static unsigned char *signal_print;
static unsigned char *signal_program;
+/* Table of signals that the target may silently handle.
+ This is automatically determined from the flags above,
+ and simply cached here. */
+static unsigned char *signal_pass;
+
#define SET_SIGS(nsigs,sigs,flags) \
do { \
int signum = (nsigs); \
(flags)[signum] = 0; \
} while (0)
-/* Value to pass to target_resume() to cause all threads to resume */
+/* Value to pass to target_resume() to cause all threads to resume. */
#define RESUME_ALL minus_one_ptid
/* Nonzero if we want to give control to the user when we're notified
of shared library events by the dynamic linker. */
-static int stop_on_solib_events;
+int stop_on_solib_events;
static void
show_stop_on_solib_events (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
show_follow_fork_mode_string (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
- fprintf_filtered (file, _("\
-Debugger response to a program call of fork or vfork is \"%s\".\n"),
+ fprintf_filtered (file,
+ _("Debugger response to a program "
+ "call of fork or vfork is \"%s\".\n"),
value);
}
\f
parent thread structure's run control related fields, not just these.
Initialized to avoid "may be used uninitialized" warnings from gcc. */
struct breakpoint *step_resume_breakpoint = NULL;
+ struct breakpoint *exception_resume_breakpoint = NULL;
CORE_ADDR step_range_start = 0;
CORE_ADDR step_range_end = 0;
struct frame_id step_frame_id = { 0 };
preserve the stepping state in the fork child. */
if (follow_child && should_resume)
{
- step_resume_breakpoint
- = clone_momentary_breakpoint (tp->step_resume_breakpoint);
- step_range_start = tp->step_range_start;
- step_range_end = tp->step_range_end;
- step_frame_id = tp->step_frame_id;
+ step_resume_breakpoint = clone_momentary_breakpoint
+ (tp->control.step_resume_breakpoint);
+ step_range_start = tp->control.step_range_start;
+ step_range_end = tp->control.step_range_end;
+ step_frame_id = tp->control.step_frame_id;
+ exception_resume_breakpoint
+ = clone_momentary_breakpoint (tp->control.exception_resume_breakpoint);
/* For now, delete the parent's sr breakpoint, otherwise,
parent/child sr breakpoints are considered duplicates,
this when the breakpoints module becomes aware of
inferiors and address spaces. */
delete_step_resume_breakpoint (tp);
- tp->step_range_start = 0;
- tp->step_range_end = 0;
- tp->step_frame_id = null_frame_id;
+ tp->control.step_range_start = 0;
+ tp->control.step_range_end = 0;
+ tp->control.step_frame_id = null_frame_id;
+ delete_exception_resume_breakpoint (tp);
}
parent = inferior_ptid;
over from WAIT_PID" logic above. */
nullify_last_target_wait_ptid ();
- /* If we followed the child, switch to it... */
+ /* If we followed the child, switch to it... */
if (follow_child)
{
switch_to_thread (child);
if (should_resume)
{
tp = inferior_thread ();
- tp->step_resume_breakpoint = step_resume_breakpoint;
- tp->step_range_start = step_range_start;
- tp->step_range_end = step_range_end;
- tp->step_frame_id = step_frame_id;
+ tp->control.step_resume_breakpoint
+ = step_resume_breakpoint;
+ tp->control.step_range_start = step_range_start;
+ tp->control.step_range_end = step_range_end;
+ tp->control.step_frame_id = step_frame_id;
+ tp->control.exception_resume_breakpoint
+ = exception_resume_breakpoint;
}
else
{
forked. In that case, the resume command
issued is most likely not applicable to the
child, so just warn, and refuse to resume. */
- warning (_("\
-Not resuming: switched threads before following fork child.\n"));
+ warning (_("Not resuming: switched threads "
+ "before following fork child.\n"));
}
/* Reset breakpoints in the child as appropriate. */
"threads". We must update the bp's notion of which thread
it is for, or it'll be ignored when it triggers. */
- if (tp->step_resume_breakpoint)
- breakpoint_re_set_thread (tp->step_resume_breakpoint);
+ if (tp->control.step_resume_breakpoint)
+ breakpoint_re_set_thread (tp->control.step_resume_breakpoint);
+
+ if (tp->control.exception_resume_breakpoint)
+ breakpoint_re_set_thread (tp->control.exception_resume_breakpoint);
/* Reinsert all breakpoints in the child. The user may have set
breakpoints after catching the fork, in which case those
&& is_running (thread->ptid)
&& !is_executing (thread->ptid)
&& !thread->stop_requested
- && thread->stop_signal == TARGET_SIGNAL_0)
+ && thread->suspend.stop_signal == TARGET_SIGNAL_0)
{
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog,
struct program_space *pspace;
struct address_space *aspace;
- /* follow-fork child, detach-on-fork on */
+ /* follow-fork child, detach-on-fork on. */
old_chain = make_cleanup_restore_current_thread ();
if (exec)
fprintf_filtered (gdb_stdlog,
- "Detaching vfork parent process %d after child exec.\n",
+ "Detaching vfork parent process "
+ "%d after child exec.\n",
inf->vfork_parent->pid);
else
fprintf_filtered (gdb_stdlog,
- "Detaching vfork parent process %d after child exit.\n",
+ "Detaching vfork parent process "
+ "%d after child exit.\n",
inf->vfork_parent->pid);
}
inf->aspace = pspace->aspace;
/* Put back inferior_ptid. We'll continue mourning this
- inferior. */
+ inferior. */
do_cleanups (old_chain);
resume_parent = inf->vfork_parent->pid;
struct cleanup *old_chain = make_cleanup_restore_current_thread ();
if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "infrun: resuming vfork parent process %d\n",
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: resuming vfork parent process %d\n",
resume_parent);
iterate_over_threads (proceed_after_vfork_done, &resume_parent);
fprintf_filtered (file, _("Follow exec mode is \"%s\".\n"), value);
}
-/* EXECD_PATHNAME is assumed to be non-NULL. */
+/* EXECD_PATHNAME is assumed to be non-NULL. */
static void
follow_exec (ptid_t pid, char *execd_pathname)
{
- struct target_ops *tgt;
struct thread_info *th = inferior_thread ();
struct inferior *inf = current_inferior ();
And, we DON'T want to call delete_breakpoints() here, since
that may write the bp's "shadow contents" (the instruction
value that was overwritten witha TRAP instruction). Since
- we now have a new a.out, those shadow contents aren't valid. */
+ we now have a new a.out, those shadow contents aren't valid. */
mark_breakpoints_out ();
update_breakpoints_after_exec ();
/* If there was one, it's gone now. We cannot truly step-to-next
- statement through an exec(). */
- th->step_resume_breakpoint = NULL;
- th->step_range_start = 0;
- th->step_range_end = 0;
+ statement through an exec(). */
+ th->control.step_resume_breakpoint = NULL;
+ th->control.exception_resume_breakpoint = NULL;
+ th->control.step_range_start = 0;
+ th->control.step_range_end = 0;
/* The target reports the exec event to the main thread, even if
some other thread does the exec, and even if the main thread was
with scheduler-locking on in all-stop mode. */
th->stop_requested = 0;
- /* What is this a.out's name? */
+ /* What is this a.out's name? */
printf_unfiltered (_("%s is executing new program: %s\n"),
target_pid_to_str (inferior_ptid),
execd_pathname);
/* We've followed the inferior through an exec. Therefore, the
- inferior has essentially been killed & reborn. */
+ inferior has essentially been killed & reborn. */
gdb_flush (gdb_stdout);
char *name = alloca (strlen (gdb_sysroot)
+ strlen (execd_pathname)
+ 1);
+
strcpy (name, gdb_sysroot);
strcat (name, execd_pathname);
execd_pathname = name;
if (follow_exec_mode_string == follow_exec_mode_new)
{
struct program_space *pspace;
- struct inferior *new_inf;
/* The user wants to keep the old inferior and program spaces
around. Create a new fresh one, and switch to it. */
gdb_assert (current_program_space == inf->pspace);
- /* That a.out is now the one to use. */
+ /* That a.out is now the one to use. */
exec_file_attach (execd_pathname, 0);
- /* Load the main file's symbols. */
- symbol_file_add_main (execd_pathname, 0);
+ /* SYMFILE_DEFER_BP_RESET is used as the proper displacement for PIE
+ (Position Independent Executable) main symbol file will get applied by
+ solib_create_inferior_hook below. breakpoint_re_set would fail to insert
+ the breakpoints with the zero displacement. */
+
+ symbol_file_add (execd_pathname, SYMFILE_MAINLINE | SYMFILE_DEFER_BP_RESET,
+ NULL, 0);
+
+ set_initial_language ();
#ifdef SOLIB_CREATE_INFERIOR_HOOK
SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid));
#else
- solib_create_inferior_hook ();
+ solib_create_inferior_hook (0);
#endif
jit_inferior_created_hook ();
+ breakpoint_re_set ();
+
/* Reinsert all breakpoints. (Those which were symbolic have
been reset to the proper address in the new a.out, thanks
- to symbol_file_command...) */
+ to symbol_file_command...). */
insert_breakpoints ();
/* The next resume of this inferior should bring it to the shlib
startup breakpoints. (If the user had also set bp's on
"main" from the old (parent) process, then they'll auto-
- matically get reset there in the new process.) */
+ matically get reset there in the new process.). */
}
/* Non-zero if we just simulating a single-step. This is needed
is finished, we need to switch to deferred_step_ptid, and step it.
The use case is when one thread has hit a breakpoint, and then the user
- has switched to another thread and issued 'step'. We need to step over
+ has switched to another thread and issued 'step'. We need to step over
breakpoint in the thread which hit the breakpoint, but then continue
stepping the thread user has selected. */
static ptid_t deferred_step_ptid;
displaced step operation on it. See displaced_step_prepare and
displaced_step_fixup for details. */
-/* If this is not null_ptid, this is the thread carrying out a
- displaced single-step. This thread's state will require fixing up
- once it has completed its step. */
-static ptid_t displaced_step_ptid;
-
struct displaced_step_request
{
ptid_t ptid;
struct displaced_step_request *next;
};
-/* A queue of pending displaced stepping requests. */
-struct displaced_step_request *displaced_step_request_queue;
+/* Per-inferior displaced stepping state. */
+struct displaced_step_inferior_state
+{
+ /* Pointer to next in linked list. */
+ struct displaced_step_inferior_state *next;
+
+ /* The process this displaced step state refers to. */
+ int pid;
+
+ /* A queue of pending displaced stepping requests. One entry per
+ thread that needs to do a displaced step. */
+ struct displaced_step_request *step_request_queue;
+
+ /* If this is not null_ptid, this is the thread carrying out a
+ displaced single-step in process PID. This thread's state will
+ require fixing up once it has completed its step. */
+ ptid_t step_ptid;
+
+ /* The architecture the thread had when we stepped it. */
+ struct gdbarch *step_gdbarch;
+
+ /* The closure provided gdbarch_displaced_step_copy_insn, to be used
+ for post-step cleanup. */
+ struct displaced_step_closure *step_closure;
+
+ /* The address of the original instruction, and the copy we
+ made. */
+ CORE_ADDR step_original, step_copy;
+
+ /* Saved contents of copy area. */
+ gdb_byte *step_saved_copy;
+};
+
+/* The list of states of processes involved in displaced stepping
+ presently. */
+static struct displaced_step_inferior_state *displaced_step_inferior_states;
+
+/* Get the displaced stepping state of process PID. */
+
+static struct displaced_step_inferior_state *
+get_displaced_stepping_state (int pid)
+{
+ struct displaced_step_inferior_state *state;
+
+ for (state = displaced_step_inferior_states;
+ state != NULL;
+ state = state->next)
+ if (state->pid == pid)
+ return state;
+
+ return NULL;
+}
+
+/* Add a new displaced stepping state for process PID to the displaced
+ stepping state list, or return a pointer to an already existing
+ entry, if it already exists. Never returns NULL. */
+
+static struct displaced_step_inferior_state *
+add_displaced_stepping_state (int pid)
+{
+ struct displaced_step_inferior_state *state;
+
+ for (state = displaced_step_inferior_states;
+ state != NULL;
+ state = state->next)
+ if (state->pid == pid)
+ return state;
+
+ state = xcalloc (1, sizeof (*state));
+ state->pid = pid;
+ state->next = displaced_step_inferior_states;
+ displaced_step_inferior_states = state;
+
+ return state;
+}
+
+/* If inferior is in displaced stepping, and ADDR equals to starting address
+ of copy area, return corresponding displaced_step_closure. Otherwise,
+ return NULL. */
+
+struct displaced_step_closure*
+get_displaced_step_closure_by_addr (CORE_ADDR addr)
+{
+ struct displaced_step_inferior_state *displaced
+ = get_displaced_stepping_state (ptid_get_pid (inferior_ptid));
+
+ /* If checking the mode of displaced instruction in copy area. */
+ if (displaced && !ptid_equal (displaced->step_ptid, null_ptid)
+ && (displaced->step_copy == addr))
+ return displaced->step_closure;
+
+ return NULL;
+}
+
+/* Remove the displaced stepping state of process PID. */
+
+static void
+remove_displaced_stepping_state (int pid)
+{
+ struct displaced_step_inferior_state *it, **prev_next_p;
-/* The architecture the thread had when we stepped it. */
-static struct gdbarch *displaced_step_gdbarch;
+ gdb_assert (pid != 0);
-/* The closure provided gdbarch_displaced_step_copy_insn, to be used
- for post-step cleanup. */
-static struct displaced_step_closure *displaced_step_closure;
+ it = displaced_step_inferior_states;
+ prev_next_p = &displaced_step_inferior_states;
+ while (it)
+ {
+ if (it->pid == pid)
+ {
+ *prev_next_p = it->next;
+ xfree (it);
+ return;
+ }
-/* The address of the original instruction, and the copy we made. */
-static CORE_ADDR displaced_step_original, displaced_step_copy;
+ prev_next_p = &it->next;
+ it = *prev_next_p;
+ }
+}
-/* Saved contents of copy area. */
-static gdb_byte *displaced_step_saved_copy;
+static void
+infrun_inferior_exit (struct inferior *inf)
+{
+ remove_displaced_stepping_state (inf->pid);
+}
/* Enum strings for "set|show displaced-stepping". */
const char *value)
{
if (can_use_displaced_stepping == can_use_displaced_stepping_auto)
- fprintf_filtered (file, _("\
-Debugger's willingness to use displaced stepping to step over \
-breakpoints is %s (currently %s).\n"),
+ fprintf_filtered (file,
+ _("Debugger's willingness to use displaced stepping "
+ "to step over breakpoints is %s (currently %s).\n"),
value, non_stop ? "on" : "off");
else
- fprintf_filtered (file, _("\
-Debugger's willingness to use displaced stepping to step over \
-breakpoints is %s.\n"), value);
+ fprintf_filtered (file,
+ _("Debugger's willingness to use displaced stepping "
+ "to step over breakpoints is %s.\n"), value);
}
/* Return non-zero if displaced stepping can/should be used to step
/* Clean out any stray displaced stepping state. */
static void
-displaced_step_clear (void)
+displaced_step_clear (struct displaced_step_inferior_state *displaced)
{
/* Indicate that there is no cleanup pending. */
- displaced_step_ptid = null_ptid;
+ displaced->step_ptid = null_ptid;
- if (displaced_step_closure)
+ if (displaced->step_closure)
{
- gdbarch_displaced_step_free_closure (displaced_step_gdbarch,
- displaced_step_closure);
- displaced_step_closure = NULL;
+ gdbarch_displaced_step_free_closure (displaced->step_gdbarch,
+ displaced->step_closure);
+ displaced->step_closure = NULL;
}
}
static void
-displaced_step_clear_cleanup (void *ignore)
+displaced_step_clear_cleanup (void *arg)
{
- displaced_step_clear ();
+ struct displaced_step_inferior_state *state = arg;
+
+ displaced_step_clear (state);
}
/* Dump LEN bytes at BUF in hex to FILE, followed by a newline. */
CORE_ADDR original, copy;
ULONGEST len;
struct displaced_step_closure *closure;
+ struct displaced_step_inferior_state *displaced;
/* We should never reach this function if the architecture does not
support displaced stepping. */
gdb_assert (gdbarch_displaced_step_copy_insn_p (gdbarch));
- /* For the first cut, we're displaced stepping one thread at a
- time. */
+ /* We have to displaced step one thread at a time, as we only have
+ access to a single scratch space per inferior. */
+
+ displaced = add_displaced_stepping_state (ptid_get_pid (ptid));
- if (!ptid_equal (displaced_step_ptid, null_ptid))
+ if (!ptid_equal (displaced->step_ptid, null_ptid))
{
/* Already waiting for a displaced step to finish. Defer this
request and place in queue. */
new_req->ptid = ptid;
new_req->next = NULL;
- if (displaced_step_request_queue)
+ if (displaced->step_request_queue)
{
- for (req = displaced_step_request_queue;
+ for (req = displaced->step_request_queue;
req && req->next;
req = req->next)
;
req->next = new_req;
}
else
- displaced_step_request_queue = new_req;
+ displaced->step_request_queue = new_req;
return 0;
}
target_pid_to_str (ptid));
}
- displaced_step_clear ();
+ displaced_step_clear (displaced);
old_cleanups = save_inferior_ptid ();
inferior_ptid = ptid;
len = gdbarch_max_insn_length (gdbarch);
/* Save the original contents of the copy area. */
- displaced_step_saved_copy = xmalloc (len);
+ displaced->step_saved_copy = xmalloc (len);
ignore_cleanups = make_cleanup (free_current_contents,
- &displaced_step_saved_copy);
- read_memory (copy, displaced_step_saved_copy, len);
+ &displaced->step_saved_copy);
+ read_memory (copy, displaced->step_saved_copy, len);
if (debug_displaced)
{
fprintf_unfiltered (gdb_stdlog, "displaced: saved %s: ",
paddress (gdbarch, copy));
- displaced_step_dump_bytes (gdb_stdlog, displaced_step_saved_copy, len);
+ displaced_step_dump_bytes (gdb_stdlog,
+ displaced->step_saved_copy,
+ len);
};
closure = gdbarch_displaced_step_copy_insn (gdbarch,
/* Save the information we need to fix things up if the step
succeeds. */
- displaced_step_ptid = ptid;
- displaced_step_gdbarch = gdbarch;
- displaced_step_closure = closure;
- displaced_step_original = original;
- displaced_step_copy = copy;
+ displaced->step_ptid = ptid;
+ displaced->step_gdbarch = gdbarch;
+ displaced->step_closure = closure;
+ displaced->step_original = original;
+ displaced->step_copy = copy;
- make_cleanup (displaced_step_clear_cleanup, 0);
+ make_cleanup (displaced_step_clear_cleanup, displaced);
/* Resume execution at the copy. */
regcache_write_pc (regcache, copy);
}
static void
-write_memory_ptid (ptid_t ptid, CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
+write_memory_ptid (ptid_t ptid, CORE_ADDR memaddr,
+ const gdb_byte *myaddr, int len)
{
struct cleanup *ptid_cleanup = save_inferior_ptid ();
+
inferior_ptid = ptid;
write_memory (memaddr, myaddr, len);
do_cleanups (ptid_cleanup);
displaced_step_fixup (ptid_t event_ptid, enum target_signal signal)
{
struct cleanup *old_cleanups;
+ struct displaced_step_inferior_state *displaced
+ = get_displaced_stepping_state (ptid_get_pid (event_ptid));
+
+ /* Was any thread of this process doing a displaced step? */
+ if (displaced == NULL)
+ return;
/* Was this event for the pid we displaced? */
- if (ptid_equal (displaced_step_ptid, null_ptid)
- || ! ptid_equal (displaced_step_ptid, event_ptid))
+ if (ptid_equal (displaced->step_ptid, null_ptid)
+ || ! ptid_equal (displaced->step_ptid, event_ptid))
return;
- old_cleanups = make_cleanup (displaced_step_clear_cleanup, 0);
+ old_cleanups = make_cleanup (displaced_step_clear_cleanup, displaced);
/* Restore the contents of the copy area. */
{
- ULONGEST len = gdbarch_max_insn_length (displaced_step_gdbarch);
- write_memory_ptid (displaced_step_ptid, displaced_step_copy,
- displaced_step_saved_copy, len);
+ ULONGEST len = gdbarch_max_insn_length (displaced->step_gdbarch);
+
+ write_memory_ptid (displaced->step_ptid, displaced->step_copy,
+ displaced->step_saved_copy, len);
if (debug_displaced)
fprintf_unfiltered (gdb_stdlog, "displaced: restored %s\n",
- paddress (displaced_step_gdbarch,
- displaced_step_copy));
+ paddress (displaced->step_gdbarch,
+ displaced->step_copy));
}
/* Did the instruction complete successfully? */
if (signal == TARGET_SIGNAL_TRAP)
{
/* Fix up the resulting state. */
- gdbarch_displaced_step_fixup (displaced_step_gdbarch,
- displaced_step_closure,
- displaced_step_original,
- displaced_step_copy,
- get_thread_regcache (displaced_step_ptid));
+ gdbarch_displaced_step_fixup (displaced->step_gdbarch,
+ displaced->step_closure,
+ displaced->step_original,
+ displaced->step_copy,
+ get_thread_regcache (displaced->step_ptid));
}
else
{
relocate the PC. */
struct regcache *regcache = get_thread_regcache (event_ptid);
CORE_ADDR pc = regcache_read_pc (regcache);
- pc = displaced_step_original + (pc - displaced_step_copy);
+
+ pc = displaced->step_original + (pc - displaced->step_copy);
regcache_write_pc (regcache, pc);
}
do_cleanups (old_cleanups);
- displaced_step_ptid = null_ptid;
+ displaced->step_ptid = null_ptid;
/* Are there any pending displaced stepping requests? If so, run
- one now. */
- while (displaced_step_request_queue)
+ one now. Leave the state object around, since we're likely to
+ need it again soon. */
+ while (displaced->step_request_queue)
{
struct displaced_step_request *head;
ptid_t ptid;
CORE_ADDR actual_pc;
struct address_space *aspace;
- head = displaced_step_request_queue;
+ head = displaced->step_request_queue;
ptid = head->ptid;
- displaced_step_request_queue = head->next;
+ displaced->step_request_queue = head->next;
xfree (head);
context_switch (ptid);
displaced_step_dump_bytes (gdb_stdlog, buf, sizeof (buf));
}
- if (gdbarch_displaced_step_hw_singlestep
- (gdbarch, displaced_step_closure))
+ if (gdbarch_displaced_step_hw_singlestep (gdbarch,
+ displaced->step_closure))
target_resume (ptid, 1, TARGET_SIGNAL_0);
else
target_resume (ptid, 0, TARGET_SIGNAL_0);
/* The breakpoint we were sitting under has since been
removed. */
- tp->trap_expected = 0;
+ tp->control.trap_expected = 0;
/* Go back to what we were trying to do. */
step = currently_stepping (tp);
if (debug_displaced)
- fprintf_unfiltered (gdb_stdlog, "breakpoint is gone %s: step(%d)\n",
+ fprintf_unfiltered (gdb_stdlog,
+ "breakpoint is gone %s: step(%d)\n",
target_pid_to_str (tp->ptid), step);
target_resume (ptid, step, TARGET_SIGNAL_0);
- tp->stop_signal = TARGET_SIGNAL_0;
+ tp->suspend.stop_signal = TARGET_SIGNAL_0;
/* This request was discarded. See if there's any other
thread waiting for its turn. */
infrun_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid)
{
struct displaced_step_request *it;
+ struct displaced_step_inferior_state *displaced;
if (ptid_equal (inferior_ptid, old_ptid))
inferior_ptid = new_ptid;
if (ptid_equal (singlestep_ptid, old_ptid))
singlestep_ptid = new_ptid;
- if (ptid_equal (displaced_step_ptid, old_ptid))
- displaced_step_ptid = new_ptid;
-
if (ptid_equal (deferred_step_ptid, old_ptid))
deferred_step_ptid = new_ptid;
- for (it = displaced_step_request_queue; it; it = it->next)
- if (ptid_equal (it->ptid, old_ptid))
- it->ptid = new_ptid;
+ for (displaced = displaced_step_inferior_states;
+ displaced;
+ displaced = displaced->next)
+ {
+ if (ptid_equal (displaced->step_ptid, old_ptid))
+ displaced->step_ptid = new_ptid;
+
+ for (it = displaced->step_request_queue; it; it = it->next)
+ if (ptid_equal (it->ptid, old_ptid))
+ it->ptid = new_ptid;
+ }
}
\f
show_scheduler_mode (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
- fprintf_filtered (file, _("\
-Mode for locking scheduler during execution is \"%s\".\n"),
+ fprintf_filtered (file,
+ _("Mode for locking scheduler "
+ "during execution is \"%s\".\n"),
value);
}
{
int hw_step = 1;
- if (gdbarch_software_single_step_p (gdbarch)
+ if (execution_direction == EXEC_FORWARD
+ && gdbarch_software_single_step_p (gdbarch)
&& gdbarch_software_single_step (gdbarch, get_current_frame ()))
{
hw_step = 0;
/* Do not pull these breakpoints until after a `wait' in
- `wait_for_inferior' */
+ `wait_for_inferior'. */
singlestep_breakpoints_inserted_p = 1;
singlestep_ptid = inferior_ptid;
singlestep_pc = pc;
QUIT;
+ if (current_inferior ()->waiting_for_vfork_done)
+ {
+ /* Don't try to single-step a vfork parent that is waiting for
+ the child to get out of the shared memory region (by exec'ing
+ or exiting). This is particularly important on software
+ single-step archs, as the child process would trip on the
+ software single step breakpoint inserted for the parent
+ process. Since the parent will not actually execute any
+ instruction until the child is out of the shared region (such
+ are vfork's semantics), it is safe to simply continue it.
+ Eventually, we'll see a TARGET_WAITKIND_VFORK_DONE event for
+ the parent, and tell it to `keep_going', which automatically
+ re-sets it stepping. */
+ if (debug_infrun)
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: resume : clear step\n");
+ step = 0;
+ }
+
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog,
"infrun: resume (step=%d, signal=%d), "
- "trap_expected=%d\n",
- step, sig, tp->trap_expected);
-
- /* 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)
- remove_hw_watchpoints ();
-
+ "trap_expected=%d, current thread [%s] at %s\n",
+ step, sig, tp->control.trap_expected,
+ target_pid_to_str (inferior_ptid),
+ paddress (gdbarch, pc));
/* Normally, by the time we reach `resume', the breakpoints are either
removed or inserted, as appropriate. The exception is if we're sitting
We can't use displaced stepping when we have a signal to deliver;
the comments for displaced_step_prepare explain why. The
comments in the handle_inferior event for dealing with 'random
- signals' explain what we do instead. */
+ signals' explain what we do instead.
+
+ We can't use displaced stepping when we are waiting for vfork_done
+ event, displaced stepping breaks the vfork child similarly as single
+ step software breakpoint. */
if (use_displaced_stepping (gdbarch)
- && (tp->trap_expected
+ && (tp->control.trap_expected
|| (step && gdbarch_software_single_step_p (gdbarch)))
- && sig == TARGET_SIGNAL_0)
+ && sig == TARGET_SIGNAL_0
+ && !current_inferior ()->waiting_for_vfork_done)
{
+ struct displaced_step_inferior_state *displaced;
+
if (!displaced_step_prepare (inferior_ptid))
{
/* Got placed in displaced stepping queue. Will be resumed
return;
}
- step = gdbarch_displaced_step_hw_singlestep
- (gdbarch, displaced_step_closure);
+ displaced = get_displaced_stepping_state (ptid_get_pid (inferior_ptid));
+ step = gdbarch_displaced_step_hw_singlestep (gdbarch,
+ displaced->step_closure);
}
/* Do we need to do it the hard way, w/temp breakpoints? */
else if (step)
step = maybe_software_singlestep (gdbarch, pc);
+ /* Currently, our software single-step implementation leads to different
+ results than hardware single-stepping in one situation: when stepping
+ into delivering a signal which has an associated signal handler,
+ hardware single-step will stop at the first instruction of the handler,
+ while software single-step will simply skip execution of the handler.
+
+ For now, this difference in behavior is accepted since there is no
+ easy way to actually implement single-stepping into a signal handler
+ without kernel support.
+
+ However, there is one scenario where this difference leads to follow-on
+ problems: if we're stepping off a breakpoint by removing all breakpoints
+ and then single-stepping. In this case, the software single-step
+ behavior means that even if there is a *breakpoint* in the signal
+ handler, GDB still would not stop.
+
+ Fortunately, we can at least fix this particular issue. We detect
+ here the case where we are about to deliver a signal while software
+ single-stepping with breakpoints removed. In this situation, we
+ revert the decisions to remove all breakpoints and insert single-
+ step breakpoints, and instead we install a step-resume breakpoint
+ at the current address, deliver the signal without stepping, and
+ once we arrive back at the step-resume breakpoint, actually step
+ over the breakpoint we originally wanted to step over. */
+ if (singlestep_breakpoints_inserted_p
+ && tp->control.trap_expected && sig != TARGET_SIGNAL_0)
+ {
+ /* If we have nested signals or a pending signal is delivered
+ immediately after a handler returns, might might already have
+ a step-resume breakpoint set on the earlier handler. We cannot
+ set another step-resume breakpoint; just continue on until the
+ original breakpoint is hit. */
+ if (tp->control.step_resume_breakpoint == NULL)
+ {
+ insert_step_resume_breakpoint_at_frame (get_current_frame ());
+ tp->step_after_step_resume_breakpoint = 1;
+ }
+
+ remove_single_step_breakpoints ();
+ singlestep_breakpoints_inserted_p = 0;
+
+ insert_breakpoints ();
+ tp->control.trap_expected = 0;
+ }
+
if (should_resume)
{
ptid_t resume_ptid;
resume_ptid = inferior_ptid;
}
else if ((step || singlestep_breakpoints_inserted_p)
- && tp->trap_expected)
+ && tp->control.trap_expected)
{
/* We're allowing a thread to run past a breakpoint it has
hit, by single-stepping the thread with the breakpoint
|| (scheduler_mode == schedlock_step
&& (step || singlestep_breakpoints_inserted_p)))
{
- /* User-settable 'scheduler' mode requires solo thread resume. */
+ /* User-settable 'scheduler' mode requires solo thread resume. */
resume_ptid = inferior_ptid;
}
if (debug_displaced
&& use_displaced_stepping (gdbarch)
- && tp->trap_expected)
+ && tp->control.trap_expected)
{
struct regcache *resume_regcache = get_thread_regcache (resume_ptid);
struct gdbarch *resume_gdbarch = get_regcache_arch (resume_regcache);
/* Avoid confusing the next resume, if the next stop/resume
happens to apply to another thread. */
- tp->stop_signal = TARGET_SIGNAL_0;
+ tp->suspend.stop_signal = TARGET_SIGNAL_0;
+
+ /* Advise target which signals may be handled silently. If we have
+ removed breakpoints because we are stepping over one (which can
+ happen only if we are not using displaced stepping), we need to
+ receive all signals to avoid accidentally skipping a breakpoint
+ during execution of a signal handler. */
+ if ((step || singlestep_breakpoints_inserted_p)
+ && tp->control.trap_expected
+ && !use_displaced_stepping (gdbarch))
+ target_pass_signals (0, NULL);
+ else
+ target_pass_signals ((int) TARGET_SIGNAL_LAST, signal_pass);
target_resume (resume_ptid, step, sig);
}
"infrun: clear_proceed_status_thread (%s)\n",
target_pid_to_str (tp->ptid));
- tp->trap_expected = 0;
- tp->step_range_start = 0;
- tp->step_range_end = 0;
- tp->step_frame_id = null_frame_id;
- tp->step_stack_frame_id = null_frame_id;
- tp->step_over_calls = STEP_OVER_UNDEBUGGABLE;
+ tp->control.trap_expected = 0;
+ tp->control.step_range_start = 0;
+ tp->control.step_range_end = 0;
+ tp->control.step_frame_id = null_frame_id;
+ tp->control.step_stack_frame_id = null_frame_id;
+ tp->control.step_over_calls = STEP_OVER_UNDEBUGGABLE;
tp->stop_requested = 0;
- tp->stop_step = 0;
+ tp->control.stop_step = 0;
- tp->proceed_to_finish = 0;
+ tp->control.proceed_to_finish = 0;
/* Discard any remaining commands or status from previous stop. */
- bpstat_clear (&tp->stop_bpstat);
+ bpstat_clear (&tp->control.stop_bpstat);
}
static int
}
inferior = current_inferior ();
- inferior->stop_soon = NO_STOP_QUIETLY;
+ inferior->control.stop_soon = NO_STOP_QUIETLY;
}
stop_after_trap = 0;
event. If a step-over is required return TRUE and set the current thread
to the old thread. Otherwise return FALSE.
- This should be suitable for any targets that support threads. */
+ This should be suitable for any targets that support threads. */
static int
prepare_to_proceed (int step)
/* Make sure we were stopped at a breakpoint. */
if (wait_status.kind != TARGET_WAITKIND_STOPPED
- || wait_status.value.sig != TARGET_SIGNAL_TRAP)
+ || (wait_status.value.sig != TARGET_SIGNAL_TRAP
+ && wait_status.value.sig != TARGET_SIGNAL_ILL
+ && wait_status.value.sig != TARGET_SIGNAL_SEGV
+ && wait_status.value.sig != TARGET_SIGNAL_EMT))
{
return 0;
}
/* Switch back to WAIT_PID thread. */
switch_to_thread (wait_ptid);
+ if (debug_infrun)
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: prepare_to_proceed (step=%d), "
+ "switched to [%s]\n",
+ step, target_pid_to_str (inferior_ptid));
+
/* We return 1 to indicate that there is a breakpoint here,
so we need to step over it before continuing to avoid
- hitting it straight away. */
+ hitting it straight away. */
return 1;
}
}
prepare_to_proceed checks the current thread against the
thread that reported the most recent event. If a step-over
is required it returns TRUE and sets the current thread to
- the old thread. */
+ the old thread. */
if (prepare_to_proceed (step))
oneproc = 1;
}
if (oneproc)
{
- tp->trap_expected = 1;
+ tp->control.trap_expected = 1;
/* If displaced stepping is enabled, we can step over the
breakpoint without hitting it, so leave all breakpoints
inserted. Otherwise we need to disable all breakpoints, step
/* We can insert breakpoints if we're not trying to step over one,
or if we are stepping over one but we're using displaced stepping
to do so. */
- if (! tp->trap_expected || use_displaced_stepping (gdbarch))
+ if (! tp->control.trap_expected || use_displaced_stepping (gdbarch))
insert_breakpoints ();
if (!non_stop)
last_thread = find_thread_ptid (last_ptid);
if (last_thread)
{
- tp->stop_signal = last_thread->stop_signal;
- last_thread->stop_signal = TARGET_SIGNAL_0;
+ tp->suspend.stop_signal = last_thread->suspend.stop_signal;
+ last_thread->suspend.stop_signal = TARGET_SIGNAL_0;
}
}
}
if (siggnal != TARGET_SIGNAL_DEFAULT)
- tp->stop_signal = siggnal;
+ tp->suspend.stop_signal = siggnal;
/* If this signal should not be seen by program,
give it zero. Used for debugging signals. */
- else if (!signal_program[tp->stop_signal])
- tp->stop_signal = TARGET_SIGNAL_0;
+ else if (!signal_program[tp->suspend.stop_signal])
+ tp->suspend.stop_signal = TARGET_SIGNAL_0;
annotate_starting ();
or a return command, we often end up a few instructions forward, still
within the original line we started.
- An attempt was made to have init_execution_control_state () refresh
- the prev_pc value before calculating the line number. This approach
- did not work because on platforms that use ptrace, the pc register
- cannot be read unless the inferior is stopped. At that point, we
- are not guaranteed the inferior is stopped and so the regcache_read_pc ()
- call can fail. Setting the prev_pc value here ensures the value is
- updated correctly when the inferior is stopped. */
+ An attempt was made to refresh the prev_pc at the same time the
+ execution_control_state is initialized (for instance, just before
+ waiting for an inferior event). But this approach did not work
+ because of platforms that use ptrace, where the pc register cannot
+ be read unless the inferior is stopped. At that point, we are not
+ guaranteed the inferior is stopped and so the regcache_read_pc() call
+ can fail. Setting the prev_pc value here ensures the value is updated
+ correctly when the inferior is stopped. */
tp->prev_pc = regcache_read_pc (get_current_regcache ());
/* Fill in with reasonable starting values. */
init_infwait_state ();
/* Resume inferior. */
- resume (oneproc || step || bpstat_should_step (), tp->stop_signal);
+ resume (oneproc || step || bpstat_should_step (), tp->suspend.stop_signal);
/* Wait for it to stop (if not standalone)
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. */
+ does not support asynchronous execution. */
if (!target_can_async_p ())
{
- wait_for_inferior (0);
+ wait_for_inferior ();
normal_stop ();
}
}
start_remote (int from_tty)
{
struct inferior *inferior;
- init_wait_for_inferior ();
+ init_wait_for_inferior ();
inferior = current_inferior ();
- inferior->stop_soon = STOP_QUIETLY_REMOTE;
+ inferior->control.stop_soon = STOP_QUIETLY_REMOTE;
- /* Always go on waiting for the target, regardless of the mode. */
+ /* 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. */
+ 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 (0);
+ for an async run. */
+ wait_for_inferior ();
/* Now that the inferior has stopped, do any bookkeeping like
loading shared libraries. We want to do this before normal_stop,
previous_inferior_ptid = null_ptid;
init_infwait_state ();
- displaced_step_clear ();
-
/* Discard any skipped inlined frames. */
clear_inline_frame_state (minus_one_ptid);
}
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
-{
- /* Step, next, nexti, stepi finished. */
- END_STEPPING_RANGE,
- /* Inferior terminated by signal. */
- SIGNAL_EXITED,
- /* Inferior exited. */
- EXITED,
- /* Inferior received signal, and user asked to be notified. */
- SIGNAL_RECEIVED,
- /* Reverse execution -- target ran out of history info. */
- NO_HISTORY
-};
-
/* The PTID we'll do a target_wait on.*/
ptid_t waiton_ptid;
int wait_some_more;
};
-static void init_execution_control_state (struct execution_control_state *ecs);
-
static void handle_inferior_event (struct execution_control_state *ecs);
static void handle_step_into_function (struct gdbarch *gdbarch,
struct execution_control_state *ecs);
static void handle_step_into_function_backward (struct gdbarch *gdbarch,
struct execution_control_state *ecs);
-static void insert_step_resume_breakpoint_at_frame (struct frame_info *step_frame);
-static void insert_step_resume_breakpoint_at_caller (struct frame_info *);
-static void insert_step_resume_breakpoint_at_sal (struct gdbarch *gdbarch,
- struct symtab_and_line sr_sal,
- struct frame_id sr_id);
-static void insert_longjmp_resume_breakpoint (struct gdbarch *, CORE_ADDR);
+static void check_exception_resume (struct execution_control_state *,
+ struct frame_info *, struct symbol *);
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);
/* Callback for iterate over threads. If the thread is stopped, but
the user/frontend doesn't know about that yet, go through
static void
infrun_thread_stop_requested (ptid_t ptid)
{
- struct displaced_step_request *it, *next, *prev = NULL;
+ struct displaced_step_inferior_state *displaced;
/* PTID was requested to stop. Remove it from the displaced
stepping queue, so we don't try to resume it automatically. */
- for (it = displaced_step_request_queue; it; it = next)
+
+ for (displaced = displaced_step_inferior_states;
+ displaced;
+ displaced = displaced->next)
{
- next = it->next;
+ struct displaced_step_request *it, **prev_next_p;
- if (ptid_equal (it->ptid, ptid)
- || ptid_equal (minus_one_ptid, ptid)
- || (ptid_is_pid (ptid)
- && ptid_get_pid (ptid) == ptid_get_pid (it->ptid)))
+ it = displaced->step_request_queue;
+ prev_next_p = &displaced->step_request_queue;
+ while (it)
{
- if (displaced_step_request_queue == it)
- displaced_step_request_queue = it->next;
+ if (ptid_match (it->ptid, ptid))
+ {
+ *prev_next_p = it->next;
+ it->next = NULL;
+ xfree (it);
+ }
else
- prev->next = it->next;
+ {
+ prev_next_p = &it->next;
+ }
- xfree (it);
+ it = *prev_next_p;
}
- else
- prev = it;
}
iterate_over_threads (infrun_thread_stop_requested_callback, &ptid);
return 0;
delete_step_resume_breakpoint (info);
+ delete_exception_resume_breakpoint (info);
return 0;
}
longjmp-resume breakpoint of the thread that just stopped
stepping. */
struct thread_info *tp = inferior_thread ();
+
delete_step_resume_breakpoint (tp);
+ delete_exception_resume_breakpoint (tp);
}
else
/* In all-stop mode, delete all step-resume and longjmp-resume
iterate_over_threads (delete_step_resume_breakpoint_callback, NULL);
}
-/* A cleanup wrapper. */
+/* A cleanup wrapper. */
static void
delete_step_thread_step_resume_breakpoint_cleanup (void *arg)
ui_file_delete (tmp_stream);
}
-/* Wait for control to return from inferior to debugger.
+/* Prepare and stabilize the inferior for detaching it. E.g.,
+ detaching while a thread is displaced stepping is a recipe for
+ crashing it, as nothing would readjust the PC out of the scratch
+ pad. */
+
+void
+prepare_for_detach (void)
+{
+ struct inferior *inf = current_inferior ();
+ ptid_t pid_ptid = pid_to_ptid (inf->pid);
+ struct cleanup *old_chain_1;
+ struct displaced_step_inferior_state *displaced;
+
+ displaced = get_displaced_stepping_state (inf->pid);
+
+ /* Is any thread of this process displaced stepping? If not,
+ there's nothing else to do. */
+ if (displaced == NULL || ptid_equal (displaced->step_ptid, null_ptid))
+ return;
+
+ if (debug_infrun)
+ fprintf_unfiltered (gdb_stdlog,
+ "displaced-stepping in-process while detaching");
+
+ old_chain_1 = make_cleanup_restore_integer (&inf->detaching);
+ inf->detaching = 1;
+
+ while (!ptid_equal (displaced->step_ptid, null_ptid))
+ {
+ struct cleanup *old_chain_2;
+ struct execution_control_state ecss;
+ struct execution_control_state *ecs;
+
+ ecs = &ecss;
+ memset (ecs, 0, sizeof (*ecs));
+
+ overlay_cache_invalid = 1;
+
+ /* We have to invalidate the registers BEFORE calling
+ target_wait because they can be loaded from the target while
+ in target_wait. This makes remote debugging a bit more
+ efficient for those targets that provide critical registers
+ as part of their normal status mechanism. */
+
+ registers_changed ();
+
+ if (deprecated_target_wait_hook)
+ ecs->ptid = deprecated_target_wait_hook (pid_ptid, &ecs->ws, 0);
+ else
+ ecs->ptid = target_wait (pid_ptid, &ecs->ws, 0);
+
+ if (debug_infrun)
+ print_target_wait_results (pid_ptid, ecs->ptid, &ecs->ws);
+
+ /* If an error happens while handling the event, propagate GDB's
+ knowledge of the executing state to the frontend/user running
+ state. */
+ old_chain_2 = make_cleanup (finish_thread_state_cleanup,
+ &minus_one_ptid);
+
+ /* In non-stop mode, each thread is handled individually.
+ Switch early, so the global state is set correctly for this
+ thread. */
+ if (non_stop
+ && ecs->ws.kind != TARGET_WAITKIND_EXITED
+ && ecs->ws.kind != TARGET_WAITKIND_SIGNALLED)
+ context_switch (ecs->ptid);
+
+ /* Now figure out what to do with the result of the result. */
+ handle_inferior_event (ecs);
+
+ /* No error, don't finish the state yet. */
+ discard_cleanups (old_chain_2);
+
+ /* Breakpoints and watchpoints are not installed on the target
+ at this point, and signals are passed directly to the
+ inferior, so this must mean the process is gone. */
+ if (!ecs->wait_some_more)
+ {
+ discard_cleanups (old_chain_1);
+ error (_("Program exited while detaching"));
+ }
+ }
+
+ discard_cleanups (old_chain_1);
+}
- If TREAT_EXEC_AS_SIGTRAP is non-zero, then handle EXEC signals
- as if they were SIGTRAP signals. This can be useful during
- the startup sequence on some targets such as HP/UX, where
- we receive an EXEC event instead of the expected SIGTRAP.
+/* Wait for control to return from inferior to debugger.
If inferior gets a signal, we may decide to start it up again
instead of returning. That is why there is a loop in this function.
should be left stopped and GDB should read more commands. */
void
-wait_for_inferior (int treat_exec_as_sigtrap)
+wait_for_inferior (void)
{
struct cleanup *old_cleanups;
struct execution_control_state ecss;
if (debug_infrun)
fprintf_unfiltered
- (gdb_stdlog, "infrun: wait_for_inferior (treat_exec_as_sigtrap=%d)\n",
- treat_exec_as_sigtrap);
+ (gdb_stdlog, "infrun: wait_for_inferior ()\n");
old_cleanups =
make_cleanup (delete_step_thread_step_resume_breakpoint_cleanup, NULL);
because they can be loaded from the target while in target_wait.
This makes remote debugging a bit more efficient for those
targets that provide critical registers as part of their normal
- status mechanism. */
+ status mechanism. */
overlay_cache_invalid = 1;
registers_changed ();
if (debug_infrun)
print_target_wait_results (waiton_ptid, ecs->ptid, &ecs->ws);
- if (treat_exec_as_sigtrap && ecs->ws.kind == TARGET_WAITKIND_EXECD)
- {
- xfree (ecs->ws.value.execd_pathname);
- ecs->ws.kind = TARGET_WAITKIND_STOPPED;
- ecs->ws.value.sig = TARGET_SIGNAL_TRAP;
- }
-
/* If an error happens while handling the event, propagate GDB's
knowledge of the executing state to the frontend/user running
state. */
do_cleanups (old_cleanups);
}
-/* Asynchronous version of wait_for_inferior. It is called by the
+/* Asynchronous version of wait_for_inferior. It is called by the
event loop whenever a change of state is detected on the file
- descriptor corresponding to the target. It can be called more than
- once to complete a single execution command. In such cases we need
- to keep the state in a global variable ECSS. If it is the last time
+ descriptor corresponding to the target. It can be called more than
+ once to complete a single execution command. In such cases we need
+ to keep the state in a global variable ECSS. If it is the last time
that this function is called for a single execution command, then
report to the user that the inferior has stopped, and do the
- necessary cleanups. */
+ necessary cleanups. */
void
fetch_inferior_event (void *client_data)
/* We'll update this if & when we switch to a new thread. */
previous_inferior_ptid = inferior_ptid;
+ /* We're handling a live event, so make sure we're doing live
+ debugging. If we're looking at traceframes while the target is
+ running, we're going to need to get back to that mode after
+ handling the event. */
+ if (non_stop)
+ {
+ make_cleanup_restore_current_traceframe ();
+ set_current_traceframe (-1);
+ }
+
if (non_stop)
/* In non-stop mode, the user/frontend should not notice a thread
switch due to internal events. Make sure we reverse to the
because they can be loaded from the target while in target_wait.
This makes remote debugging a bit more efficient for those
targets that provide critical registers as part of their normal
- status mechanism. */
+ status mechanism. */
overlay_cache_invalid = 1;
registers_changed ();
delete_step_thread_step_resume_breakpoint ();
/* We may not find an inferior if this was a process exit. */
- if (inf == NULL || inf->stop_soon == NO_STOP_QUIETLY)
+ if (inf == NULL || inf->control.stop_soon == NO_STOP_QUIETLY)
normal_stop ();
if (target_has_execution
&& ecs->ws.kind != TARGET_WAITKIND_EXITED
&& ecs->ws.kind != TARGET_WAITKIND_SIGNALLED
&& ecs->event_thread->step_multi
- && ecs->event_thread->stop_step)
+ && ecs->event_thread->control.stop_step)
inferior_event_handler (INF_EXEC_CONTINUE, NULL);
else
inferior_event_handler (INF_EXEC_COMPLETE, NULL);
{
struct thread_info *tp = inferior_thread ();
- tp->step_frame_id = get_frame_id (frame);
- tp->step_stack_frame_id = get_stack_frame_id (frame);
+ tp->control.step_frame_id = get_frame_id (frame);
+ tp->control.step_stack_frame_id = get_stack_frame_id (frame);
tp->current_symtab = sal.symtab;
tp->current_line = sal.line;
}
-/* Prepare an execution control state for looping through a
- wait_for_inferior-type loop. */
-
-static void
-init_execution_control_state (struct execution_control_state *ecs)
-{
- ecs->random_signal = 0;
-}
-
/* Clear context switchable stepping state. */
void
|| (non_stop && moribund_breakpoint_here_p (aspace, breakpoint_pc)))
{
struct cleanup *old_cleanups = NULL;
+
if (RECORD_IS_USED)
old_cleanups = record_gdb_operation_disable_set ();
void
error_is_running (void)
{
- error (_("\
-Cannot execute this command while the selected thread is running."));
+ error (_("Cannot execute this command while "
+ "the selected thread is running."));
}
void
fprintf_unfiltered (gdb_stdlog, "infrun: syscall number = '%d'\n",
syscall_number);
- ecs->event_thread->stop_bpstat
+ ecs->event_thread->control.stop_bpstat
= bpstat_stop_status (get_regcache_aspace (regcache),
stop_pc, ecs->ptid);
- ecs->random_signal = !bpstat_explains_signal (ecs->event_thread->stop_bpstat);
+ ecs->random_signal
+ = !bpstat_explains_signal (ecs->event_thread->control.stop_bpstat);
if (!ecs->random_signal)
{
/* Catchpoint hit. */
- ecs->event_thread->stop_signal = TARGET_SIGNAL_TRAP;
+ ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_TRAP;
return 0;
}
}
/* If no catchpoint triggered for this, then keep going. */
- ecs->event_thread->stop_signal = TARGET_SIGNAL_0;
+ ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
keep_going (ecs);
return 1;
}
&& ecs->ws.kind != TARGET_WAITKIND_SIGNALLED)
{
struct inferior *inf = find_inferior_pid (ptid_get_pid (ecs->ptid));
+
gdb_assert (inf);
- stop_soon = inf->stop_soon;
+ stop_soon = inf->control.stop_soon;
}
else
stop_soon = NO_STOP_QUIETLY;
- /* Cache the last pid/waitstatus. */
+ /* Cache the last pid/waitstatus. */
target_last_wait_ptid = ecs->ptid;
target_last_waitstatus = ecs->ws;
/* Always clear state belonging to the previous time we stopped. */
- stop_stack_dummy = 0;
+ stop_stack_dummy = STOP_NONE;
- /* If it's a new process, add it to the thread database */
+ /* If it's a new process, add it to the thread database. */
ecs->new_thread_event = (!ptid_equal (ecs->ptid, inferior_ptid)
&& !ptid_equal (ecs->ptid, minus_one_ptid)
breakpoint_retire_moribund ();
+ /* First, distinguish signals caused by the debugger from signals
+ that have to do with the program's own actions. Note that
+ breakpoint insns may cause SIGTRAP or SIGILL or SIGEMT, depending
+ on the operating system version. Here we detect when a SIGILL or
+ SIGEMT is really a breakpoint and change it to SIGTRAP. We do
+ something similar for SIGSEGV, since a SIGSEGV will be generated
+ when we're trying to execute a breakpoint instruction on a
+ non-executable stack. This happens for call dummy breakpoints
+ for architectures like SPARC that place call dummies on the
+ stack. */
+ if (ecs->ws.kind == TARGET_WAITKIND_STOPPED
+ && (ecs->ws.value.sig == TARGET_SIGNAL_ILL
+ || ecs->ws.value.sig == TARGET_SIGNAL_SEGV
+ || ecs->ws.value.sig == TARGET_SIGNAL_EMT))
+ {
+ struct regcache *regcache = get_thread_regcache (ecs->ptid);
+
+ if (breakpoint_inserted_here_p (get_regcache_aspace (regcache),
+ regcache_read_pc (regcache)))
+ {
+ if (debug_infrun)
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: Treating signal as SIGTRAP\n");
+ ecs->ws.value.sig = TARGET_SIGNAL_TRAP;
+ }
+ }
+
/* Mark the non-executing threads accordingly. In all-stop, all
threads of all processes are stopped when we get any event
reported. In non-stop mode, only the event thread stops. If
set_current_inferior (find_inferior_pid (ptid_get_pid (ecs->ptid)));
set_current_program_space (current_inferior ()->pspace);
handle_vfork_child_exec_or_exit (0);
- target_terminal_ours (); /* Must do this before mourn anyway */
- print_stop_reason (EXITED, ecs->ws.value.integer);
+ target_terminal_ours (); /* Must do this before mourn anyway. */
+ print_exited_reason (ecs->ws.value.integer);
/* Record the exit code in the convenience variable $_exitcode, so
that the user can inspect this again later. */
gdb_flush (gdb_stdout);
target_mourn_inferior ();
singlestep_breakpoints_inserted_p = 0;
+ cancel_single_step_breakpoints ();
stop_print_frame = 0;
stop_stepping (ecs);
return;
set_current_program_space (current_inferior ()->pspace);
handle_vfork_child_exec_or_exit (0);
stop_print_frame = 0;
- target_terminal_ours (); /* Must do this before mourn anyway */
+ target_terminal_ours (); /* Must do this before mourn anyway. */
/* 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. */
+ may be needed. */
target_mourn_inferior ();
- print_stop_reason (SIGNAL_EXITED, ecs->ws.value.sig);
+ print_signal_exited_reason (ecs->ws.value.sig);
singlestep_breakpoints_inserted_p = 0;
+ cancel_single_step_breakpoints ();
stop_stepping (ecs);
return;
/* The following are the only cases in which we keep going;
- the above cases end in a continue or goto. */
+ the above cases end in a continue or goto. */
case TARGET_WAITKIND_FORKED:
case TARGET_WAITKIND_VFORKED:
if (debug_infrun)
detach_breakpoints (child_pid);
}
+ if (singlestep_breakpoints_inserted_p)
+ {
+ /* Pull the single step breakpoints out of the target. */
+ remove_single_step_breakpoints ();
+ singlestep_breakpoints_inserted_p = 0;
+ }
+
/* In case the event is caught by a catchpoint, remember that
the event is to be followed at the next resume of the thread,
and not immediately. */
stop_pc = regcache_read_pc (get_thread_regcache (ecs->ptid));
- ecs->event_thread->stop_bpstat
+ ecs->event_thread->control.stop_bpstat
= bpstat_stop_status (get_regcache_aspace (get_current_regcache ()),
stop_pc, ecs->ptid);
causes a stop, not just if it may explain the signal.
Software watchpoints, for example, always appear in the
bpstat. */
- ecs->random_signal = !bpstat_causes_stop (ecs->event_thread->stop_bpstat);
+ ecs->random_signal
+ = !bpstat_causes_stop (ecs->event_thread->control.stop_bpstat);
/* If no catchpoint triggered for this, then keep going. */
if (ecs->random_signal)
ptid_t parent;
ptid_t child;
int should_resume;
- int follow_child = (follow_fork_mode_string == follow_fork_mode_child);
+ int follow_child
+ = (follow_fork_mode_string == follow_fork_mode_child);
- ecs->event_thread->stop_signal = TARGET_SIGNAL_0;
+ ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
should_resume = follow_fork ();
stop_stepping (ecs);
return;
}
- ecs->event_thread->stop_signal = TARGET_SIGNAL_TRAP;
+ ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_TRAP;
goto process_event_stop_test;
case TARGET_WAITKIND_VFORK_DONE:
the parent, and keep going. */
if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_VFORK_DONE\n");
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: TARGET_WAITKIND_VFORK_DONE\n");
if (!ptid_equal (ecs->ptid, inferior_ptid))
context_switch (ecs->ptid);
reinit_frame_cache ();
}
+ singlestep_breakpoints_inserted_p = 0;
+ cancel_single_step_breakpoints ();
+
stop_pc = regcache_read_pc (get_thread_regcache (ecs->ptid));
/* Do whatever is necessary to the parent branch of the vfork. */
stop. */
follow_exec (inferior_ptid, ecs->ws.value.execd_pathname);
- ecs->event_thread->stop_bpstat
+ ecs->event_thread->control.stop_bpstat
= bpstat_stop_status (get_regcache_aspace (get_current_regcache ()),
stop_pc, ecs->ptid);
- ecs->random_signal = !bpstat_explains_signal (ecs->event_thread->stop_bpstat);
+ ecs->random_signal
+ = !bpstat_explains_signal (ecs->event_thread->control.stop_bpstat);
/* Note that this may be referenced from inside
bpstat_stop_status above, through inferior_has_execd. */
/* If no catchpoint triggered for this, then keep going. */
if (ecs->random_signal)
{
- ecs->event_thread->stop_signal = TARGET_SIGNAL_0;
+ ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
keep_going (ecs);
return;
}
- ecs->event_thread->stop_signal = TARGET_SIGNAL_TRAP;
+ ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_TRAP;
goto process_event_stop_test;
/* Be careful not to try to gather much state about a thread
that's in a syscall. It's frequently a losing proposition. */
case TARGET_WAITKIND_SYSCALL_ENTRY:
if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_SYSCALL_ENTRY\n");
- /* Getting the current syscall number */
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: TARGET_WAITKIND_SYSCALL_ENTRY\n");
+ /* Getting the current syscall number. */
if (handle_syscall_event (ecs) != 0)
return;
goto process_event_stop_test;
into user code.) */
case TARGET_WAITKIND_SYSCALL_RETURN:
if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_SYSCALL_RETURN\n");
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: TARGET_WAITKIND_SYSCALL_RETURN\n");
if (handle_syscall_event (ecs) != 0)
return;
goto process_event_stop_test;
case TARGET_WAITKIND_STOPPED:
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_STOPPED\n");
- ecs->event_thread->stop_signal = ecs->ws.value.sig;
+ ecs->event_thread->suspend.stop_signal = ecs->ws.value.sig;
break;
case TARGET_WAITKIND_NO_HISTORY:
/* Reverse execution: target ran out of history info. */
stop_pc = regcache_read_pc (get_thread_regcache (ecs->ptid));
- print_stop_reason (NO_HISTORY, 0);
+ print_no_history_reason ();
stop_stepping (ecs);
return;
}
if (non_stop)
/* Non-stop assumes that the target handles adding new threads
to the thread list. */
- internal_error (__FILE__, __LINE__, "\
-targets should add new threads to the thread list themselves in non-stop mode.");
+ internal_error (__FILE__, __LINE__,
+ "targets should add new threads to the thread "
+ "list themselves in non-stop mode.");
/* We may want to consider not doing a resume here in order to
give the user a chance to play with the new thread. It might
/* Do we need to clean up the state of a thread that has
completed a displaced single-step? (Doing so usually affects
the PC, so do it here, before we set stop_pc.) */
- displaced_step_fixup (ecs->ptid, ecs->event_thread->stop_signal);
+ displaced_step_fixup (ecs->ptid,
+ ecs->event_thread->suspend.stop_signal);
/* If we either finished a single-step or hit a breakpoint, but
the user wanted this thread to be stopped, pretend we got a
SIG0 (generic unsignaled stop). */
if (ecs->event_thread->stop_requested
- && ecs->event_thread->stop_signal == TARGET_SIGNAL_TRAP)
- ecs->event_thread->stop_signal = TARGET_SIGNAL_0;
+ && ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP)
+ ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
}
stop_pc = regcache_read_pc (get_thread_regcache (ecs->ptid));
if (target_stopped_by_watchpoint ())
{
CORE_ADDR addr;
+
fprintf_unfiltered (gdb_stdlog, "infrun: stopped by watchpoint\n");
if (target_stopped_data_address (¤t_target, &addr))
/* We've either finished single-stepping past the single-step
breakpoint, or stopped for some other reason. It would be nice if
we could tell, but we can't reliably. */
- if (ecs->event_thread->stop_signal == TARGET_SIGNAL_TRAP)
+ if (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP)
{
if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "infrun: stepping_past_singlestep_breakpoint\n");
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: stepping_past_"
+ "singlestep_breakpoint\n");
/* Pull the single step breakpoints out of the target. */
remove_single_step_breakpoints ();
singlestep_breakpoints_inserted_p = 0;
ecs->random_signal = 0;
- ecs->event_thread->trap_expected = 0;
+ ecs->event_thread->control.trap_expected = 0;
context_switch (saved_singlestep_ptid);
if (deprecated_context_hook)
/* If we stopped for some other reason than single-stepping, ignore
the fact that we were supposed to switch back. */
- if (ecs->event_thread->stop_signal == TARGET_SIGNAL_TRAP)
+ if (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP)
{
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog,
singlestep_breakpoints_inserted_p = 0;
}
+ ecs->event_thread->control.trap_expected = 0;
+
/* Note: We do not call context_switch at this point, as the
context is already set up for stepping the original thread. */
switch_to_thread (deferred_step_ptid);
another thread. If so, then step that thread past the breakpoint,
and continue it. */
- if (ecs->event_thread->stop_signal == TARGET_SIGNAL_TRAP)
+ if (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP)
{
int thread_hop_needed = 0;
- struct address_space *aspace = get_regcache_aspace (get_current_regcache ());
+ struct address_space *aspace =
+ get_regcache_aspace (get_thread_regcache (ecs->ptid));
/* Check if a regular breakpoint has been hit before checking
- for a potential single step breakpoint. Otherwise, GDB will
+ for a potential single step breakpoint. Otherwise, GDB will
not see this breakpoint hit when stepping onto breakpoints. */
if (regular_breakpoint_inserted_here_p (aspace, stop_pc))
{
singlestep_ptid. Don't swap here, since that's
the context we want to use. Just fudge our
state and continue. */
- stop_signal = ecs->event_thread->stop_signal;
- ecs->event_thread->stop_signal = TARGET_SIGNAL_0;
+ stop_signal = ecs->event_thread->suspend.stop_signal;
+ ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
ecs->ptid = singlestep_ptid;
ecs->event_thread = find_thread_ptid (ecs->ptid);
- ecs->event_thread->stop_signal = stop_signal;
+ ecs->event_thread->suspend.stop_signal = stop_signal;
stop_pc = new_singlestep_pc;
}
else
context_switch (ecs->ptid);
/* Saw a breakpoint, but it was hit by the wrong thread.
- Just continue. */
+ Just continue. */
if (singlestep_breakpoints_inserted_p)
{
- /* Pull the single step breakpoints out of the target. */
+ /* Pull the single step breakpoints out of the target. */
remove_single_step_breakpoints ();
singlestep_breakpoints_inserted_p = 0;
}
the bp's: On HP-UX's that use ttrace, we can't
change the address space of a vforking child
process until the child exits (well, okay, not
- then either :-) or execs. */
+ then either :-) or execs. */
if (remove_status != 0)
error (_("Cannot step over breakpoint hit in wrong thread"));
else
if (singlestep_breakpoints_inserted_p)
{
- /* Pull the single step breakpoints out of the target. */
+ /* Pull the single step breakpoints out of the target. */
remove_single_step_breakpoints ();
singlestep_breakpoints_inserted_p = 0;
}
int hw_step = 1;
if (!target_have_steppable_watchpoint)
- remove_breakpoints ();
+ {
+ remove_breakpoints ();
+ /* See comment in resume why we need to stop bypassing signals
+ while breakpoints have been removed. */
+ target_pass_signals (0, NULL);
+ }
/* Single step */
hw_step = maybe_software_singlestep (gdbarch, stop_pc);
target_resume (ecs->ptid, hw_step, TARGET_SIGNAL_0);
ecs->stop_func_start
+= gdbarch_deprecated_function_start_offset (gdbarch);
ecs->event_thread->stepping_over_breakpoint = 0;
- bpstat_clear (&ecs->event_thread->stop_bpstat);
- ecs->event_thread->stop_step = 0;
+ bpstat_clear (&ecs->event_thread->control.stop_bpstat);
+ ecs->event_thread->control.stop_step = 0;
stop_print_frame = 1;
ecs->random_signal = 0;
stopped_by_random_signal = 0;
/* Hide inlined functions starting here, unless we just performed stepi or
nexti. After stepi and nexti, always show the innermost frame (not any
inline function call sites). */
- if (ecs->event_thread->step_range_end != 1)
+ if (ecs->event_thread->control.step_range_end != 1)
skip_inline_frames (ecs->ptid);
- if (ecs->event_thread->stop_signal == TARGET_SIGNAL_TRAP
- && ecs->event_thread->trap_expected
+ if (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP
+ && ecs->event_thread->control.trap_expected
&& gdbarch_single_step_through_delay_p (gdbarch)
&& currently_stepping (ecs->event_thread))
{
/* We're trying to step off a breakpoint. Turns out that we're
also on an instruction that needs to be stepped multiple
- times before it's been fully executing. E.g., architectures
+ times before it's been fully executing. E.g., architectures
with a delay slot. It needs to be stepped twice, once for
the instruction and once for the delay slot. */
int step_through_delay
= gdbarch_single_step_through_delay (gdbarch, frame);
+
if (debug_infrun && step_through_delay)
fprintf_unfiltered (gdb_stdlog, "infrun: step through delay\n");
- if (ecs->event_thread->step_range_end == 0 && step_through_delay)
+ if (ecs->event_thread->control.step_range_end == 0
+ && step_through_delay)
{
/* The user issued a continue when stopped at a breakpoint.
Set up for another trap and get out of here. */
3) set ecs->random_signal to 1, and the decision between 1 and 2
will be made according to the signal handling tables. */
- /* First, distinguish signals caused by the debugger from signals
- that have to do with the program's own actions. Note that
- breakpoint insns may cause SIGTRAP or SIGILL or SIGEMT, depending
- on the operating system version. Here we detect when a SIGILL or
- SIGEMT is really a breakpoint and change it to SIGTRAP. We do
- something similar for SIGSEGV, since a SIGSEGV will be generated
- when we're trying to execute a breakpoint instruction on a
- non-executable stack. This happens for call dummy breakpoints
- for architectures like SPARC that place call dummies on the
- stack.
-
- If we're doing a displaced step past a breakpoint, then the
- breakpoint is always inserted at the original instruction;
- non-standard signals can't be explained by the breakpoint. */
- if (ecs->event_thread->stop_signal == TARGET_SIGNAL_TRAP
- || (! ecs->event_thread->trap_expected
- && breakpoint_inserted_here_p (get_regcache_aspace (get_current_regcache ()),
- stop_pc)
- && (ecs->event_thread->stop_signal == TARGET_SIGNAL_ILL
- || ecs->event_thread->stop_signal == TARGET_SIGNAL_SEGV
- || ecs->event_thread->stop_signal == TARGET_SIGNAL_EMT))
+ if (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP
|| stop_soon == STOP_QUIETLY || stop_soon == STOP_QUIETLY_NO_SIGSTOP
|| stop_soon == STOP_QUIETLY_REMOTE)
{
- if (ecs->event_thread->stop_signal == TARGET_SIGNAL_TRAP && stop_after_trap)
+ if (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP
+ && stop_after_trap)
{
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog, "infrun: stopped\n");
TARGET_SIGNAL_0, meaning: stopped for no particular reason
other than GDB's request. */
if (stop_soon == STOP_QUIETLY_NO_SIGSTOP
- && (ecs->event_thread->stop_signal == TARGET_SIGNAL_STOP
- || ecs->event_thread->stop_signal == TARGET_SIGNAL_TRAP
- || ecs->event_thread->stop_signal == TARGET_SIGNAL_0))
+ && (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_STOP
+ || ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP
+ || ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_0))
{
stop_stepping (ecs);
- ecs->event_thread->stop_signal = TARGET_SIGNAL_0;
+ ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
return;
}
/* See if there is a breakpoint at the current PC. */
- ecs->event_thread->stop_bpstat
+ ecs->event_thread->control.stop_bpstat
= bpstat_stop_status (get_regcache_aspace (get_current_regcache ()),
stop_pc, ecs->ptid);
function. */
stop_print_frame = 1;
+ /* This is where we handle "moribund" watchpoints. Unlike
+ software breakpoints traps, hardware watchpoint traps are
+ always distinguishable from random traps. If no high-level
+ watchpoint is associated with the reported stop data address
+ anymore, then the bpstat does not explain the signal ---
+ simply make sure to ignore it if `stopped_by_watchpoint' is
+ set. */
+
+ if (debug_infrun
+ && ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP
+ && !bpstat_explains_signal (ecs->event_thread->control.stop_bpstat)
+ && stopped_by_watchpoint)
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: no user watchpoint explains "
+ "watchpoint SIGTRAP, ignoring\n");
+
/* NOTE: cagney/2003-03-29: These two checks for a random signal
at one stage in the past included checks for an inferior
function call's call dummy's return breakpoint. The original
be necessary for call dummies on a non-executable stack on
SPARC. */
- if (ecs->event_thread->stop_signal == TARGET_SIGNAL_TRAP)
+ if (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP)
ecs->random_signal
- = !(bpstat_explains_signal (ecs->event_thread->stop_bpstat)
- || ecs->event_thread->trap_expected
- || (ecs->event_thread->step_range_end
- && ecs->event_thread->step_resume_breakpoint == NULL));
+ = !(bpstat_explains_signal (ecs->event_thread->control.stop_bpstat)
+ || stopped_by_watchpoint
+ || ecs->event_thread->control.trap_expected
+ || (ecs->event_thread->control.step_range_end
+ && (ecs->event_thread->control.step_resume_breakpoint
+ == NULL)));
else
{
- ecs->random_signal = !bpstat_explains_signal (ecs->event_thread->stop_bpstat);
+ ecs->random_signal = !bpstat_explains_signal
+ (ecs->event_thread->control.stop_bpstat);
if (!ecs->random_signal)
- ecs->event_thread->stop_signal = TARGET_SIGNAL_TRAP;
+ ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_TRAP;
}
}
/* When we reach this point, we've pretty much decided
that the reason for stopping must've been a random
- (unexpected) signal. */
+ (unexpected) signal. */
else
ecs->random_signal = 1;
{
/* Signal not for debugging purposes. */
int printed = 0;
+ struct inferior *inf = find_inferior_pid (ptid_get_pid (ecs->ptid));
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog, "infrun: random signal %d\n",
- ecs->event_thread->stop_signal);
+ ecs->event_thread->suspend.stop_signal);
stopped_by_random_signal = 1;
- if (signal_print[ecs->event_thread->stop_signal])
+ if (signal_print[ecs->event_thread->suspend.stop_signal])
{
printed = 1;
target_terminal_ours_for_output ();
- print_stop_reason (SIGNAL_RECEIVED, ecs->event_thread->stop_signal);
+ print_signal_received_reason
+ (ecs->event_thread->suspend.stop_signal);
}
/* Always stop on signals if we're either just gaining control
of the program, or the user explicitly requested this thread
to remain stopped. */
if (stop_soon != NO_STOP_QUIETLY
|| ecs->event_thread->stop_requested
- || signal_stop_state (ecs->event_thread->stop_signal))
+ || (!inf->detaching
+ && signal_stop_state (ecs->event_thread->suspend.stop_signal)))
{
stop_stepping (ecs);
return;
target_terminal_inferior ();
/* Clear the signal if it should not be passed. */
- if (signal_program[ecs->event_thread->stop_signal] == 0)
- ecs->event_thread->stop_signal = TARGET_SIGNAL_0;
+ if (signal_program[ecs->event_thread->suspend.stop_signal] == 0)
+ ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
if (ecs->event_thread->prev_pc == stop_pc
- && ecs->event_thread->trap_expected
- && ecs->event_thread->step_resume_breakpoint == NULL)
+ && ecs->event_thread->control.trap_expected
+ && ecs->event_thread->control.step_resume_breakpoint == NULL)
{
/* We were just starting a new sequence, attempting to
single-step off of a breakpoint and expecting a SIGTRAP.
insert_step_resume_breakpoint_at_frame (frame);
ecs->event_thread->step_after_step_resume_breakpoint = 1;
+ /* Reset trap_expected to ensure breakpoints are re-inserted. */
+ ecs->event_thread->control.trap_expected = 0;
keep_going (ecs);
return;
}
- if (ecs->event_thread->step_range_end != 0
- && ecs->event_thread->stop_signal != TARGET_SIGNAL_0
- && (ecs->event_thread->step_range_start <= stop_pc
- && stop_pc < ecs->event_thread->step_range_end)
+ if (ecs->event_thread->control.step_range_end != 0
+ && ecs->event_thread->suspend.stop_signal != TARGET_SIGNAL_0
+ && (ecs->event_thread->control.step_range_start <= stop_pc
+ && stop_pc < ecs->event_thread->control.step_range_end)
&& frame_id_eq (get_stack_frame_id (frame),
- ecs->event_thread->step_stack_frame_id)
- && ecs->event_thread->step_resume_breakpoint == NULL)
+ ecs->event_thread->control.step_stack_frame_id)
+ && ecs->event_thread->control.step_resume_breakpoint == NULL)
{
/* The inferior is about to take a signal that will take it
out of the single step range. Set a breakpoint at the
"single-step range\n");
insert_step_resume_breakpoint_at_frame (frame);
+ /* Reset trap_expected to ensure breakpoints are re-inserted. */
+ ecs->event_thread->control.trap_expected = 0;
keep_going (ecs);
return;
}
CORE_ADDR jmp_buf_pc;
struct bpstat_what what;
- what = bpstat_what (ecs->event_thread->stop_bpstat);
+ what = bpstat_what (ecs->event_thread->control.stop_bpstat);
if (what.call_dummy)
{
- stop_stack_dummy = 1;
+ stop_stack_dummy = what.call_dummy;
}
+ /* If we hit an internal event that triggers symbol changes, the
+ current frame will be invalidated within bpstat_what (e.g., if
+ we hit an internal solib event). Re-fetch it. */
+ frame = get_current_frame ();
+ gdbarch = get_frame_arch (frame);
+
switch (what.main_action)
{
case BPSTAT_WHAT_SET_LONGJMP_RESUME:
ecs->event_thread->stepping_over_breakpoint = 1;
- if (!gdbarch_get_longjmp_target_p (gdbarch)
- || !gdbarch_get_longjmp_target (gdbarch, frame, &jmp_buf_pc))
+ if (what.is_longjmp)
{
- if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "\
-infrun: BPSTAT_WHAT_SET_LONGJMP_RESUME (!gdbarch_get_longjmp_target)\n");
- keep_going (ecs);
- return;
- }
+ if (!gdbarch_get_longjmp_target_p (gdbarch)
+ || !gdbarch_get_longjmp_target (gdbarch,
+ frame, &jmp_buf_pc))
+ {
+ if (debug_infrun)
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: BPSTAT_WHAT_SET_LONGJMP_RESUME "
+ "(!gdbarch_get_longjmp_target)\n");
+ keep_going (ecs);
+ return;
+ }
- /* We're going to replace the current step-resume breakpoint
- with a longjmp-resume breakpoint. */
- delete_step_resume_breakpoint (ecs->event_thread);
+ /* We're going to replace the current step-resume breakpoint
+ with a longjmp-resume breakpoint. */
+ delete_step_resume_breakpoint (ecs->event_thread);
- /* Insert a breakpoint at resume address. */
- insert_longjmp_resume_breakpoint (gdbarch, jmp_buf_pc);
+ /* Insert a breakpoint at resume address. */
+ insert_longjmp_resume_breakpoint (gdbarch, jmp_buf_pc);
+ }
+ else
+ {
+ struct symbol *func = get_frame_function (frame);
+ if (func)
+ check_exception_resume (ecs, frame, func);
+ }
keep_going (ecs);
return;
fprintf_unfiltered (gdb_stdlog,
"infrun: BPSTAT_WHAT_CLEAR_LONGJMP_RESUME\n");
- gdb_assert (ecs->event_thread->step_resume_breakpoint != NULL);
- delete_step_resume_breakpoint (ecs->event_thread);
+ if (what.is_longjmp)
+ {
+ gdb_assert (ecs->event_thread->control.step_resume_breakpoint
+ != NULL);
+ delete_step_resume_breakpoint (ecs->event_thread);
+ }
+ else
+ {
+ /* There are several cases to consider.
- ecs->event_thread->stop_step = 1;
- print_stop_reason (END_STEPPING_RANGE, 0);
+ 1. The initiating frame no longer exists. In this case
+ we must stop, because the exception has gone too far.
+
+ 2. The initiating frame exists, and is the same as the
+ current frame. We stop, because the exception has been
+ caught.
+
+ 3. The initiating frame exists and is different from
+ the current frame. This means the exception has been
+ caught beneath the initiating frame, so keep going. */
+ struct frame_info *init_frame
+ = frame_find_by_id (ecs->event_thread->initiating_frame);
+
+ gdb_assert (ecs->event_thread->control.exception_resume_breakpoint
+ != NULL);
+ delete_exception_resume_breakpoint (ecs->event_thread);
+
+ if (init_frame)
+ {
+ struct frame_id current_id
+ = get_frame_id (get_current_frame ());
+ if (frame_id_eq (current_id,
+ ecs->event_thread->initiating_frame))
+ {
+ /* Case 2. Fall through. */
+ }
+ else
+ {
+ /* Case 3. */
+ keep_going (ecs);
+ return;
+ }
+ }
+
+ /* For Cases 1 and 2, remove the step-resume breakpoint,
+ if it exists. */
+ delete_step_resume_breakpoint (ecs->event_thread);
+ }
+
+ ecs->event_thread->control.stop_step = 1;
+ print_end_stepping_range_reason ();
stop_stepping (ecs);
return;
}
break;
- case BPSTAT_WHAT_CHECK_SHLIBS:
- {
- if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_CHECK_SHLIBS\n");
-
- /* Check for any newly added shared libraries if we're
- supposed to be adding them automatically. Switch
- terminal for any messages produced by
- breakpoint_re_set. */
- target_terminal_ours_for_output ();
- /* NOTE: cagney/2003-11-25: Make certain that the target
- stack's section table is kept up-to-date. Architectures,
- (e.g., PPC64), use the section table to perform
- operations such as address => section name and hence
- require the table to contain all sections (including
- those found in shared libraries). */
-#ifdef SOLIB_ADD
- SOLIB_ADD (NULL, 0, ¤t_target, auto_solib_add);
-#else
- solib_add (NULL, 0, ¤t_target, auto_solib_add);
-#endif
- target_terminal_inferior ();
-
- /* If requested, stop when the dynamic linker notifies
- gdb of events. This allows the user to get control
- and place breakpoints in initializer routines for
- dynamically loaded objects (among other things). */
- if (stop_on_solib_events || stop_stack_dummy)
- {
- stop_stepping (ecs);
- return;
- }
- else
- {
- /* We want to step over this breakpoint, then keep going. */
- ecs->event_thread->stepping_over_breakpoint = 1;
- break;
- }
- }
- break;
-
- case BPSTAT_WHAT_CHECK_JIT:
- if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_CHECK_JIT\n");
-
- /* Switch terminal for any messages produced by breakpoint_re_set. */
- target_terminal_ours_for_output ();
-
- jit_event_handler (gdbarch);
-
- target_terminal_inferior ();
-
- /* We want to step over this breakpoint, then keep going. */
- ecs->event_thread->stepping_over_breakpoint = 1;
-
- break;
-
- case BPSTAT_WHAT_LAST:
- /* Not a real code, but listed here to shut up gcc -Wall. */
-
case BPSTAT_WHAT_KEEP_CHECKING:
break;
}
if (!non_stop)
{
struct thread_info *tp;
+
tp = iterate_over_threads (currently_stepping_or_nexting_callback,
ecs->event_thread);
if (tp)
/* However, if the current thread is blocked on some internal
breakpoint, and we simply need to step over that breakpoint
to get it going again, do that first. */
- if ((ecs->event_thread->trap_expected
- && ecs->event_thread->stop_signal != TARGET_SIGNAL_TRAP)
+ if ((ecs->event_thread->control.trap_expected
+ && ecs->event_thread->suspend.stop_signal != TARGET_SIGNAL_TRAP)
|| ecs->event_thread->stepping_over_breakpoint)
{
keep_going (ecs);
|| !target_thread_alive (tp->ptid))
{
if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "\
-infrun: not switching back to stepped thread, it has vanished\n");
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: not switching back to "
+ "stepped thread, it has vanished\n");
delete_thread (tp->ptid);
keep_going (ecs);
/* Otherwise, we no longer expect a trap in the current thread.
Clear the trap_expected flag before switching back -- this is
what keep_going would do as well, if we called it. */
- ecs->event_thread->trap_expected = 0;
+ ecs->event_thread->control.trap_expected = 0;
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog,
if (ecs->event_thread->stepping_through_solib_after_catch)
{
#if defined(SOLIB_ADD)
- /* Have we reached our destination? If not, keep going. */
+ /* Have we reached our destination? If not, keep going. */
if (SOLIB_IN_DYNAMIC_LINKER (PIDGET (ecs->ptid), stop_pc))
{
if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "infrun: stepping in dynamic linker\n");
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: stepping in dynamic linker\n");
ecs->event_thread->stepping_over_breakpoint = 1;
keep_going (ecs);
return;
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog, "infrun: step past dynamic linker\n");
/* Else, stop and report the catchpoint(s) whose triggering
- caused us to begin stepping. */
+ caused us to begin stepping. */
ecs->event_thread->stepping_through_solib_after_catch = 0;
- bpstat_clear (&ecs->event_thread->stop_bpstat);
- ecs->event_thread->stop_bpstat
+ bpstat_clear (&ecs->event_thread->control.stop_bpstat);
+ ecs->event_thread->control.stop_bpstat
= bpstat_copy (ecs->event_thread->stepping_through_solib_catchpoints);
bpstat_clear (&ecs->event_thread->stepping_through_solib_catchpoints);
stop_print_frame = 1;
return;
}
- if (ecs->event_thread->step_resume_breakpoint)
+ if (ecs->event_thread->control.step_resume_breakpoint)
{
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog,
return;
}
- if (ecs->event_thread->step_range_end == 0)
+ if (ecs->event_thread->control.step_range_end == 0)
{
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog, "infrun: no stepping, continue\n");
return;
}
+ /* Re-fetch current thread's frame in case the code above caused
+ the frame cache to be re-initialized, making our FRAME variable
+ a dangling pointer. */
+ frame = get_current_frame ();
+ gdbarch = get_frame_arch (frame);
+
/* If stepping through a line, keep going if still within it.
Note that step_range_end is the address of the first instruction
through a function epilogue and therefore must detect when
the current-frame changes in the middle of a line. */
- if (stop_pc >= ecs->event_thread->step_range_start
- && stop_pc < ecs->event_thread->step_range_end
+ if (stop_pc >= ecs->event_thread->control.step_range_start
+ && stop_pc < ecs->event_thread->control.step_range_end
&& (execution_direction != EXEC_REVERSE
|| frame_id_eq (get_frame_id (frame),
- ecs->event_thread->step_frame_id)))
+ ecs->event_thread->control.step_frame_id)))
{
if (debug_infrun)
fprintf_unfiltered
(gdb_stdlog, "infrun: stepping inside range [%s-%s]\n",
- paddress (gdbarch, ecs->event_thread->step_range_start),
- paddress (gdbarch, ecs->event_thread->step_range_end));
+ paddress (gdbarch, ecs->event_thread->control.step_range_start),
+ paddress (gdbarch, ecs->event_thread->control.step_range_end));
/* When stepping backward, stop at beginning of line range
(unless it's the function entry point, in which case
keep going back to the call point). */
- if (stop_pc == ecs->event_thread->step_range_start
+ if (stop_pc == ecs->event_thread->control.step_range_start
&& stop_pc != ecs->stop_func_start
&& execution_direction == EXEC_REVERSE)
{
- ecs->event_thread->stop_step = 1;
- print_stop_reason (END_STEPPING_RANGE, 0);
+ ecs->event_thread->control.stop_step = 1;
+ print_end_stepping_range_reason ();
stop_stepping (ecs);
}
else
down, so there is nothing for us to do here. */
if (execution_direction != EXEC_REVERSE
- && ecs->event_thread->step_over_calls == STEP_OVER_UNDEBUGGABLE
+ && ecs->event_thread->control.step_over_calls == STEP_OVER_UNDEBUGGABLE
&& in_solib_dynsym_resolve_code (stop_pc))
{
CORE_ADDR pc_after_resolver =
gdbarch_skip_solib_resolver (gdbarch, stop_pc);
if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "infrun: stepped into dynsym resolve code\n");
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: stepped into dynsym resolve code\n");
if (pc_after_resolver)
{
/* Set up a step-resume breakpoint at the address
indicated by SKIP_SOLIB_RESOLVER. */
struct symtab_and_line sr_sal;
+
init_sal (&sr_sal);
sr_sal.pc = pc_after_resolver;
sr_sal.pspace = get_frame_program_space (frame);
return;
}
- if (ecs->event_thread->step_range_end != 1
- && (ecs->event_thread->step_over_calls == STEP_OVER_UNDEBUGGABLE
- || ecs->event_thread->step_over_calls == STEP_OVER_ALL)
+ if (ecs->event_thread->control.step_range_end != 1
+ && (ecs->event_thread->control.step_over_calls == STEP_OVER_UNDEBUGGABLE
+ || ecs->event_thread->control.step_over_calls == STEP_OVER_ALL)
&& get_frame_type (frame) == SIGTRAMP_FRAME)
{
if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "infrun: stepped into signal trampoline\n");
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: stepped into signal trampoline\n");
/* The inferior, while doing a "step" or "next", has ended up in
a signal trampoline (either by a signal being delivered or by
the signal handler returning). Just single-step until the
"outermost" function. This could be fixed by marking
outermost frames as !stack_p,code_p,special_p. Then the
initial outermost frame, before sp was valid, would
- have code_addr == &_start. See the commend in frame_id_eq
+ have code_addr == &_start. See the comment in frame_id_eq
for more. */
if (!frame_id_eq (get_stack_frame_id (frame),
- ecs->event_thread->step_stack_frame_id)
+ ecs->event_thread->control.step_stack_frame_id)
&& (frame_id_eq (frame_unwind_caller_id (get_current_frame ()),
- ecs->event_thread->step_stack_frame_id)
- && (!frame_id_eq (ecs->event_thread->step_stack_frame_id,
+ ecs->event_thread->control.step_stack_frame_id)
+ && (!frame_id_eq (ecs->event_thread->control.step_stack_frame_id,
outer_frame_id)
|| step_start_function != find_pc_function (stop_pc))))
{
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog, "infrun: stepped into subroutine\n");
- if ((ecs->event_thread->step_over_calls == STEP_OVER_NONE)
- || ((ecs->event_thread->step_range_end == 1)
+ if ((ecs->event_thread->control.step_over_calls == STEP_OVER_NONE)
+ || ((ecs->event_thread->control.step_range_end == 1)
&& in_prologue (gdbarch, ecs->event_thread->prev_pc,
ecs->stop_func_start)))
{
thought it was a subroutine call but it was not. Stop as
well. FENN */
/* And this works the same backward as frontward. MVS */
- ecs->event_thread->stop_step = 1;
- print_stop_reason (END_STEPPING_RANGE, 0);
+ ecs->event_thread->control.stop_step = 1;
+ print_end_stepping_range_reason ();
stop_stepping (ecs);
return;
}
/* Reverse stepping through solib trampolines. */
if (execution_direction == EXEC_REVERSE
- && ecs->event_thread->step_over_calls != STEP_OVER_NONE
+ && ecs->event_thread->control.step_over_calls != STEP_OVER_NONE
&& (gdbarch_skip_trampoline_code (gdbarch, frame, stop_pc)
|| (ecs->stop_func_start == 0
&& in_solib_dynsym_resolve_code (stop_pc))))
return;
}
- if (ecs->event_thread->step_over_calls == STEP_OVER_ALL)
+ if (ecs->event_thread->control.step_over_calls == STEP_OVER_ALL)
{
/* We're doing a "next".
if (real_stop_pc != 0 && in_solib_dynsym_resolve_code (real_stop_pc))
{
struct symtab_and_line sr_sal;
+
init_sal (&sr_sal);
sr_sal.pc = ecs->stop_func_start;
sr_sal.pspace = get_frame_program_space (frame);
struct symtab_and_line tmp_sal;
tmp_sal = find_pc_line (ecs->stop_func_start, 0);
- tmp_sal.pspace = get_frame_program_space (frame);
if (tmp_sal.line != 0)
{
if (execution_direction == EXEC_REVERSE)
/* 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 (ecs->event_thread->step_over_calls == STEP_OVER_UNDEBUGGABLE
+ if (ecs->event_thread->control.step_over_calls == STEP_OVER_UNDEBUGGABLE
&& step_stop_if_no_debug)
{
- ecs->event_thread->stop_step = 1;
- print_stop_reason (END_STEPPING_RANGE, 0);
+ ecs->event_thread->control.stop_step = 1;
+ print_end_stepping_range_reason ();
stop_stepping (ecs);
return;
}
/* Set a breakpoint at callee's start address.
From there we can step once and be back in the caller. */
struct symtab_and_line sr_sal;
+
init_sal (&sr_sal);
sr_sal.pc = ecs->stop_func_start;
sr_sal.pspace = get_frame_program_space (frame);
/* Reverse stepping through solib trampolines. */
if (execution_direction == EXEC_REVERSE
- && ecs->event_thread->step_over_calls != STEP_OVER_NONE)
+ && ecs->event_thread->control.step_over_calls != STEP_OVER_NONE)
{
if (gdbarch_skip_trampoline_code (gdbarch, frame, stop_pc)
|| (ecs->stop_func_start == 0
Set a breakpoint at its start and continue, then
one more step will take us out. */
struct symtab_and_line sr_sal;
+
init_sal (&sr_sal);
sr_sal.pc = ecs->stop_func_start;
sr_sal.pspace = get_frame_program_space (frame);
{
/* Determine where this trampoline returns. */
CORE_ADDR real_stop_pc;
+
real_stop_pc = gdbarch_skip_trampoline_code (gdbarch, frame, stop_pc);
if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "infrun: stepped into solib return tramp\n");
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: stepped into solib return tramp\n");
/* Only proceed through if we know where it's going. */
if (real_stop_pc)
{
- /* And put the step-breakpoint there and go until there. */
+ /* And put the step-breakpoint there and go until there. */
struct symtab_and_line sr_sal;
init_sal (&sr_sal); /* initialize to zeroes */
/* NOTE: tausq/2004-05-24: This if block used to be done before all
the trampoline processing logic, however, there are some trampolines
that have no names, so we should do trampoline handling first. */
- if (ecs->event_thread->step_over_calls == STEP_OVER_UNDEBUGGABLE
+ if (ecs->event_thread->control.step_over_calls == STEP_OVER_UNDEBUGGABLE
&& ecs->stop_func_name == NULL
&& stop_pc_sal.line == 0)
{
if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "infrun: stepped into undebuggable function\n");
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: stepped into undebuggable function\n");
/* The inferior just stepped into, or returned to, an
undebuggable function (where there is no debugging information
/* 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. */
- ecs->event_thread->stop_step = 1;
- print_stop_reason (END_STEPPING_RANGE, 0);
+ ecs->event_thread->control.stop_step = 1;
+ print_end_stepping_range_reason ();
stop_stepping (ecs);
return;
}
}
}
- if (ecs->event_thread->step_range_end == 1)
+ if (ecs->event_thread->control.step_range_end == 1)
{
/* It is stepi or nexti. We always want to stop stepping after
one instruction. */
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog, "infrun: stepi/nexti\n");
- ecs->event_thread->stop_step = 1;
- print_stop_reason (END_STEPPING_RANGE, 0);
+ ecs->event_thread->control.stop_step = 1;
+ print_end_stepping_range_reason ();
stop_stepping (ecs);
return;
}
or can this happen as a result of a return or longjmp?). */
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog, "infrun: no line number info\n");
- ecs->event_thread->stop_step = 1;
- print_stop_reason (END_STEPPING_RANGE, 0);
+ ecs->event_thread->control.stop_step = 1;
+ print_end_stepping_range_reason ();
stop_stepping (ecs);
return;
}
a new inline function. */
if (frame_id_eq (get_frame_id (get_current_frame ()),
- ecs->event_thread->step_frame_id)
+ ecs->event_thread->control.step_frame_id)
&& inline_skipped_frames (ecs->ptid))
{
struct symtab_and_line call_sal;
find_frame_sal (get_current_frame (), &call_sal);
- if (ecs->event_thread->step_over_calls != STEP_OVER_ALL)
+ if (ecs->event_thread->control.step_over_calls != STEP_OVER_ALL)
{
/* For "step", we're going to stop. But if the call site
for this inlined function is on the same source line as
&& call_sal.symtab == ecs->event_thread->current_symtab)
step_into_inline_frame (ecs->ptid);
- ecs->event_thread->stop_step = 1;
- print_stop_reason (END_STEPPING_RANGE, 0);
+ ecs->event_thread->control.stop_step = 1;
+ print_end_stepping_range_reason ();
stop_stepping (ecs);
return;
}
keep_going (ecs);
else
{
- ecs->event_thread->stop_step = 1;
- print_stop_reason (END_STEPPING_RANGE, 0);
+ ecs->event_thread->control.stop_step = 1;
+ print_end_stepping_range_reason ();
stop_stepping (ecs);
}
return;
if (get_frame_type (get_current_frame ()) == INLINE_FRAME
&& !frame_id_eq (get_frame_id (get_current_frame ()),
- ecs->event_thread->step_frame_id)
+ ecs->event_thread->control.step_frame_id)
&& stepped_in_from (get_current_frame (),
- ecs->event_thread->step_frame_id))
+ ecs->event_thread->control.step_frame_id))
{
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog,
"infrun: stepping through inlined function\n");
- if (ecs->event_thread->step_over_calls == STEP_OVER_ALL)
+ if (ecs->event_thread->control.step_over_calls == STEP_OVER_ALL)
keep_going (ecs);
else
{
- ecs->event_thread->stop_step = 1;
- print_stop_reason (END_STEPPING_RANGE, 0);
+ ecs->event_thread->control.stop_step = 1;
+ print_end_stepping_range_reason ();
stop_stepping (ecs);
}
return;
That is said to make things like for (;;) statements work
better. */
if (debug_infrun)
- fprintf_unfiltered (gdb_stdlog, "infrun: stepped to a different line\n");
- ecs->event_thread->stop_step = 1;
- print_stop_reason (END_STEPPING_RANGE, 0);
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: stepped to a different line\n");
+ ecs->event_thread->control.stop_step = 1;
+ print_end_stepping_range_reason ();
stop_stepping (ecs);
return;
}
new line in mid-statement, we continue stepping. This makes
things like for(;;) statements work better.) */
- ecs->event_thread->step_range_start = stop_pc_sal.pc;
- ecs->event_thread->step_range_end = stop_pc_sal.end;
+ ecs->event_thread->control.step_range_start = stop_pc_sal.pc;
+ ecs->event_thread->control.step_range_end = stop_pc_sal.end;
set_step_info (frame, stop_pc_sal);
if (debug_infrun)
static int
currently_stepping (struct thread_info *tp)
{
- return ((tp->step_range_end && tp->step_resume_breakpoint == NULL)
- || tp->trap_expected
- || tp->stepping_through_solib_after_catch
- || bpstat_should_step ());
+ return ((tp->control.step_range_end
+ && tp->control.step_resume_breakpoint == NULL)
+ || tp->control.trap_expected
+ || tp->stepping_through_solib_after_catch
+ || bpstat_should_step ());
}
/* Returns true if any thread *but* the one passed in "data" is in the
if (tp == data)
return 0;
- return (tp->step_range_end
- || tp->trap_expected
+ return (tp->control.step_range_end
+ || tp->control.trap_expected
|| tp->stepping_through_solib_after_catch);
}
if (ecs->stop_func_start == stop_pc)
{
/* We are already there: stop now. */
- ecs->event_thread->stop_step = 1;
- print_stop_reason (END_STEPPING_RANGE, 0);
+ ecs->event_thread->control.stop_step = 1;
+ print_end_stepping_range_reason ();
stop_stepping (ecs);
return;
}
insert_step_resume_breakpoint_at_sal (gdbarch, sr_sal, null_frame_id);
/* And make sure stepping stops right away then. */
- ecs->event_thread->step_range_end = ecs->event_thread->step_range_start;
+ ecs->event_thread->control.step_range_end
+ = ecs->event_thread->control.step_range_start;
}
keep_going (ecs);
}
struct execution_control_state *ecs)
{
struct symtab *s;
- struct symtab_and_line stop_func_sal, sr_sal;
+ struct symtab_and_line stop_func_sal;
s = find_pc_symtab (stop_pc);
if (s && s->language != language_asm)
if (stop_func_sal.pc == stop_pc)
{
/* We're there already. Just stop stepping now. */
- ecs->event_thread->stop_step = 1;
- print_stop_reason (END_STEPPING_RANGE, 0);
+ ecs->event_thread->control.stop_step = 1;
+ print_end_stepping_range_reason ();
stop_stepping (ecs);
}
else
/* Else just reset the step range and keep going.
No step-resume breakpoint, they don't work for
epilogues, which can have multiple entry paths. */
- ecs->event_thread->step_range_start = stop_func_sal.pc;
- ecs->event_thread->step_range_end = stop_func_sal.end;
+ ecs->event_thread->control.step_range_start = stop_func_sal.pc;
+ ecs->event_thread->control.step_range_end = stop_func_sal.end;
keep_going (ecs);
}
return;
/* There should never be more than one step-resume or longjmp-resume
breakpoint per thread, so we should never be setting a new
step_resume_breakpoint when one is already active. */
- gdb_assert (inferior_thread ()->step_resume_breakpoint == NULL);
+ gdb_assert (inferior_thread ()->control.step_resume_breakpoint == NULL);
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog,
"infrun: inserting step-resume breakpoint at %s\n",
paddress (gdbarch, sr_sal.pc));
- inferior_thread ()->step_resume_breakpoint
+ inferior_thread ()->control.step_resume_breakpoint
= set_momentary_breakpoint (gdbarch, sr_sal, sr_id, bp_step_resume);
}
/* There should never be more than one step-resume or longjmp-resume
breakpoint per thread, so we should never be setting a new
longjmp_resume_breakpoint when one is already active. */
- gdb_assert (inferior_thread ()->step_resume_breakpoint == NULL);
+ gdb_assert (inferior_thread ()->control.step_resume_breakpoint == NULL);
if (debug_infrun)
fprintf_unfiltered (gdb_stdlog,
"infrun: inserting longjmp-resume breakpoint at %s\n",
paddress (gdbarch, pc));
- inferior_thread ()->step_resume_breakpoint =
+ inferior_thread ()->control.step_resume_breakpoint =
set_momentary_breakpoint_at_pc (gdbarch, pc, bp_longjmp_resume);
}
+/* Insert an exception resume breakpoint. TP is the thread throwing
+ the exception. The block B is the block of the unwinder debug hook
+ function. FRAME is the frame corresponding to the call to this
+ function. SYM is the symbol of the function argument holding the
+ target PC of the exception. */
+
+static void
+insert_exception_resume_breakpoint (struct thread_info *tp,
+ struct block *b,
+ struct frame_info *frame,
+ struct symbol *sym)
+{
+ struct gdb_exception e;
+
+ /* We want to ignore errors here. */
+ TRY_CATCH (e, RETURN_MASK_ERROR)
+ {
+ struct symbol *vsym;
+ struct value *value;
+ CORE_ADDR handler;
+ struct breakpoint *bp;
+
+ vsym = lookup_symbol (SYMBOL_LINKAGE_NAME (sym), b, VAR_DOMAIN, NULL);
+ value = read_var_value (vsym, frame);
+ /* If the value was optimized out, revert to the old behavior. */
+ if (! value_optimized_out (value))
+ {
+ handler = value_as_address (value);
+
+ if (debug_infrun)
+ fprintf_unfiltered (gdb_stdlog,
+ "infrun: exception resume at %lx\n",
+ (unsigned long) handler);
+
+ bp = set_momentary_breakpoint_at_pc (get_frame_arch (frame),
+ handler, bp_exception_resume);
+ bp->thread = tp->num;
+ inferior_thread ()->control.exception_resume_breakpoint = bp;
+ }
+ }
+}
+
+/* This is called when an exception has been intercepted. Check to
+ see whether the exception's destination is of interest, and if so,
+ set an exception resume breakpoint there. */
+
+static void
+check_exception_resume (struct execution_control_state *ecs,
+ struct frame_info *frame, struct symbol *func)
+{
+ struct gdb_exception e;
+
+ TRY_CATCH (e, RETURN_MASK_ERROR)
+ {
+ struct block *b;
+ struct dict_iterator iter;
+ struct symbol *sym;
+ int argno = 0;
+
+ /* The exception breakpoint is a thread-specific breakpoint on
+ the unwinder's debug hook, declared as:
+
+ void _Unwind_DebugHook (void *cfa, void *handler);
+
+ The CFA argument indicates the frame to which control is
+ about to be transferred. HANDLER is the destination PC.
+
+ We ignore the CFA and set a temporary breakpoint at HANDLER.
+ This is not extremely efficient but it avoids issues in gdb
+ with computing the DWARF CFA, and it also works even in weird
+ cases such as throwing an exception from inside a signal
+ handler. */
+
+ b = SYMBOL_BLOCK_VALUE (func);
+ ALL_BLOCK_SYMBOLS (b, iter, sym)
+ {
+ if (!SYMBOL_IS_ARGUMENT (sym))
+ continue;
+
+ if (argno == 0)
+ ++argno;
+ else
+ {
+ insert_exception_resume_breakpoint (ecs->event_thread,
+ b, frame, sym);
+ break;
+ }
+ }
+ }
+}
+
static void
stop_stepping (struct execution_control_state *ecs)
{
/* This function handles various cases where we need to continue
waiting for the inferior. */
-/* (Used to be the keep_going: label in the old wait_for_inferior) */
+/* (Used to be the keep_going: label in the old wait_for_inferior). */
static void
keep_going (struct execution_control_state *ecs)
/* If we did not do break;, it means we should keep running the
inferior and not return to debugger. */
- if (ecs->event_thread->trap_expected
- && ecs->event_thread->stop_signal != TARGET_SIGNAL_TRAP)
+ if (ecs->event_thread->control.trap_expected
+ && ecs->event_thread->suspend.stop_signal != TARGET_SIGNAL_TRAP)
{
/* We took a signal (which we are supposed to pass through to
the inferior, else we'd not get here) and we haven't yet
discard_cleanups (old_cleanups);
resume (currently_stepping (ecs->event_thread),
- ecs->event_thread->stop_signal);
+ ecs->event_thread->suspend.stop_signal);
}
else
{
if (ecs->event_thread->stepping_over_breakpoint)
{
struct regcache *thread_regcache = get_thread_regcache (ecs->ptid);
+
if (!use_displaced_stepping (get_regcache_arch (thread_regcache)))
/* Since we can't do a displaced step, we have to remove
the breakpoint while we step it. To keep things
else
{
struct gdb_exception e;
+
/* Stop stepping when inserting breakpoints
has failed. */
TRY_CATCH (e, RETURN_MASK_ERROR)
}
}
- ecs->event_thread->trap_expected = ecs->event_thread->stepping_over_breakpoint;
+ ecs->event_thread->control.trap_expected
+ = ecs->event_thread->stepping_over_breakpoint;
/* Do not deliver SIGNAL_TRAP (except when the user explicitly
specifies that such a signal should be delivered to the
halts the simulation handing control to GDB; GDB, noteing
that the break-point isn't valid, returns control back to the
simulator; the simulator then delivers the hardware
- equivalent of a SIGNAL_TRAP to the program being debugged. */
+ equivalent of a SIGNAL_TRAP to the program being debugged. */
- if (ecs->event_thread->stop_signal == TARGET_SIGNAL_TRAP
- && !signal_program[ecs->event_thread->stop_signal])
- ecs->event_thread->stop_signal = TARGET_SIGNAL_0;
+ if (ecs->event_thread->suspend.stop_signal == TARGET_SIGNAL_TRAP
+ && !signal_program[ecs->event_thread->suspend.stop_signal])
+ ecs->event_thread->suspend.stop_signal = TARGET_SIGNAL_0;
discard_cleanups (old_cleanups);
resume (currently_stepping (ecs->event_thread),
- ecs->event_thread->stop_signal);
+ ecs->event_thread->suspend.stop_signal);
}
prepare_to_wait (ecs);
ecs->wait_some_more = 1;
}
-/* 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.*/
+/* Several print_*_reason functions to 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 one of these
+ print_*_reason functions functions from handle_inferior_event each time
+ stop_stepping is called. */
+
+/* Print why the inferior has stopped.
+ We are done with a step/next/si/ni command, print why the inferior has
+ stopped. For now print nothing. Print a message only if not in the middle
+ of doing a "step n" operation for n > 1. */
+
+static void
+print_end_stepping_range_reason (void)
+{
+ if ((!inferior_thread ()->step_multi
+ || !inferior_thread ()->control.stop_step)
+ && ui_out_is_mi_like_p (uiout))
+ ui_out_field_string (uiout, "reason",
+ async_reason_lookup (EXEC_ASYNC_END_STEPPING_RANGE));
+}
+
+/* The inferior was terminated by a signal, print why it stopped. */
+
static void
-print_stop_reason (enum inferior_stop_reason stop_reason, int stop_info)
+print_signal_exited_reason (enum target_signal siggnal)
{
- switch (stop_reason)
+ annotate_signalled ();
+ if (ui_out_is_mi_like_p (uiout))
+ ui_out_field_string
+ (uiout, "reason", async_reason_lookup (EXEC_ASYNC_EXITED_SIGNALLED));
+ ui_out_text (uiout, "\nProgram terminated with signal ");
+ annotate_signal_name ();
+ ui_out_field_string (uiout, "signal-name",
+ target_signal_to_name (siggnal));
+ annotate_signal_name_end ();
+ ui_out_text (uiout, ", ");
+ annotate_signal_string ();
+ ui_out_field_string (uiout, "signal-meaning",
+ target_signal_to_string (siggnal));
+ annotate_signal_string_end ();
+ ui_out_text (uiout, ".\n");
+ ui_out_text (uiout, "The program no longer exists.\n");
+}
+
+/* The inferior program is finished, print why it stopped. */
+
+static void
+print_exited_reason (int exitstatus)
+{
+ struct inferior *inf = current_inferior ();
+ const char *pidstr = target_pid_to_str (pid_to_ptid (inf->pid));
+
+ annotate_exited (exitstatus);
+ if (exitstatus)
+ {
+ if (ui_out_is_mi_like_p (uiout))
+ ui_out_field_string (uiout, "reason",
+ async_reason_lookup (EXEC_ASYNC_EXITED));
+ ui_out_text (uiout, "[Inferior ");
+ ui_out_text (uiout, plongest (inf->num));
+ ui_out_text (uiout, " (");
+ ui_out_text (uiout, pidstr);
+ ui_out_text (uiout, ") exited with code ");
+ ui_out_field_fmt (uiout, "exit-code", "0%o", (unsigned int) exitstatus);
+ ui_out_text (uiout, "]\n");
+ }
+ else
{
- case END_STEPPING_RANGE:
- /* We are done with a step/next/si/ni command. */
- /* For now print nothing. */
- /* Print a message only if not in the middle of doing a "step n"
- operation for n > 1 */
- if (!inferior_thread ()->step_multi
- || !inferior_thread ()->stop_step)
- if (ui_out_is_mi_like_p (uiout))
- ui_out_field_string
- (uiout, "reason",
- async_reason_lookup (EXEC_ASYNC_END_STEPPING_RANGE));
- break;
- case SIGNAL_EXITED:
- /* The inferior was terminated by a signal. */
- annotate_signalled ();
if (ui_out_is_mi_like_p (uiout))
ui_out_field_string
- (uiout, "reason",
- async_reason_lookup (EXEC_ASYNC_EXITED_SIGNALLED));
- ui_out_text (uiout, "\nProgram terminated with signal ");
+ (uiout, "reason", async_reason_lookup (EXEC_ASYNC_EXITED_NORMALLY));
+ ui_out_text (uiout, "[Inferior ");
+ ui_out_text (uiout, plongest (inf->num));
+ ui_out_text (uiout, " (");
+ ui_out_text (uiout, pidstr);
+ ui_out_text (uiout, ") exited normally]\n");
+ }
+ /* Support the --return-child-result option. */
+ return_child_result_value = exitstatus;
+}
+
+/* Signal received, print why the inferior has stopped. The signal table
+ tells us to print about it. */
+
+static void
+print_signal_received_reason (enum target_signal siggnal)
+{
+ annotate_signal ();
+
+ if (siggnal == TARGET_SIGNAL_0 && !ui_out_is_mi_like_p (uiout))
+ {
+ struct thread_info *t = inferior_thread ();
+
+ ui_out_text (uiout, "\n[");
+ ui_out_field_string (uiout, "thread-name",
+ target_pid_to_str (t->ptid));
+ ui_out_field_fmt (uiout, "thread-id", "] #%d", t->num);
+ ui_out_text (uiout, " stopped");
+ }
+ else
+ {
+ ui_out_text (uiout, "\nProgram received signal ");
annotate_signal_name ();
+ if (ui_out_is_mi_like_p (uiout))
+ ui_out_field_string
+ (uiout, "reason", async_reason_lookup (EXEC_ASYNC_SIGNAL_RECEIVED));
ui_out_field_string (uiout, "signal-name",
- target_signal_to_name (stop_info));
+ target_signal_to_name (siggnal));
annotate_signal_name_end ();
ui_out_text (uiout, ", ");
annotate_signal_string ();
ui_out_field_string (uiout, "signal-meaning",
- target_signal_to_string (stop_info));
+ target_signal_to_string (siggnal));
annotate_signal_string_end ();
- ui_out_text (uiout, ".\n");
- ui_out_text (uiout, "The program no longer exists.\n");
- break;
- case EXITED:
- /* The inferior program is finished. */
- annotate_exited (stop_info);
- if (stop_info)
- {
- if (ui_out_is_mi_like_p (uiout))
- ui_out_field_string (uiout, "reason",
- async_reason_lookup (EXEC_ASYNC_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",
- async_reason_lookup (EXEC_ASYNC_EXITED_NORMALLY));
- ui_out_text (uiout, "\nProgram exited normally.\n");
- }
- /* Support the --return-child-result option. */
- return_child_result_value = stop_info;
- break;
- case SIGNAL_RECEIVED:
- /* Signal received. The signal table tells us to print about
- it. */
- annotate_signal ();
+ }
+ ui_out_text (uiout, ".\n");
+}
- if (stop_info == TARGET_SIGNAL_0 && !ui_out_is_mi_like_p (uiout))
- {
- struct thread_info *t = inferior_thread ();
+/* Reverse execution: target ran out of history info, print why the inferior
+ has stopped. */
- ui_out_text (uiout, "\n[");
- ui_out_field_string (uiout, "thread-name",
- target_pid_to_str (t->ptid));
- ui_out_field_fmt (uiout, "thread-id", "] #%d", t->num);
- ui_out_text (uiout, " stopped");
- }
- else
- {
- ui_out_text (uiout, "\nProgram received signal ");
- annotate_signal_name ();
- if (ui_out_is_mi_like_p (uiout))
- ui_out_field_string
- (uiout, "reason", async_reason_lookup (EXEC_ASYNC_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");
- break;
- case NO_HISTORY:
- /* Reverse execution: target ran out of history info. */
- ui_out_text (uiout, "\nNo more reverse-execution history.\n");
- break;
- default:
- internal_error (__FILE__, __LINE__,
- _("print_stop_reason: unrecognized enum value"));
- break;
- }
+static void
+print_no_history_reason (void)
+{
+ ui_out_text (uiout, "\nNo more reverse-execution history.\n");
}
-\f
/* Here to return control to GDB when the inferior stops for real.
Print appropriate messages, remove breakpoints, give terminal our modes.
if (remove_breakpoints ())
{
target_terminal_ours_for_output ();
- printf_filtered (_("\
-Cannot remove breakpoints because program is no longer writable.\n\
-Further execution is probably impossible.\n"));
+ printf_filtered (_("Cannot remove breakpoints because "
+ "program is no longer writable.\nFurther "
+ "execution is probably impossible.\n"));
}
}
&& last.kind != TARGET_WAITKIND_SIGNALLED
&& last.kind != TARGET_WAITKIND_EXITED
&& inferior_thread ()->step_multi
- && inferior_thread ()->stop_step)
+ && inferior_thread ()->control.stop_step)
goto done;
target_terminal_ours ();
/* Select innermost stack frame - i.e., current frame is frame 0,
and current location is based on that.
Don't do this on return from a stack dummy routine,
- or if the program has exited. */
+ or if the program has exited. */
if (!stop_stack_dummy)
{
we have changed functions or hit a breakpoint.
Print source line if we have one.
bpstat_print() contains the logic deciding in detail
- what to print, based on the event(s) that just occurred. */
+ what to print, based on the event(s) that just occurred. */
/* If --batch-silent is enabled then there's no need to print the current
source location, and to try risks causing an error message about
int do_frame_printing = 1;
struct thread_info *tp = inferior_thread ();
- bpstat_ret = bpstat_print (tp->stop_bpstat);
+ bpstat_ret = bpstat_print (tp->control.stop_bpstat);
switch (bpstat_ret)
{
case PRINT_UNKNOWN:
/* FIXME: cagney/2002-12-01: Given that a frame ID does
(or should) carry around the function and does (or
should) use that when doing a frame comparison. */
- if (tp->stop_step
- && frame_id_eq (tp->step_frame_id,
+ if (tp->control.stop_step
+ && frame_id_eq (tp->control.step_frame_id,
get_frame_id (get_current_frame ()))
&& step_start_function == find_pc_function (stop_pc))
- source_flag = SRC_LINE; /* finished step, just print source line */
+ source_flag = SRC_LINE; /* Finished step, just
+ print source line. */
else
- source_flag = SRC_AND_LOC; /* print location and source line */
+ 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 */
+ source_flag = SRC_AND_LOC; /* Print location and
+ source line. */
break;
case PRINT_SRC_ONLY:
source_flag = SRC_LINE;
flag is:
SRC_LINE: Print only source line
LOCATION: Print only location
- SRC_AND_LOC: Print location and source line */
+ SRC_AND_LOC: Print location and source line. */
if (do_frame_printing)
print_stack_frame (get_selected_frame (NULL), 0, source_flag);
/* Save the function value return registers, if we care.
We might be about to restore their previous contents. */
- if (inferior_thread ()->proceed_to_finish)
+ if (inferior_thread ()->control.proceed_to_finish)
{
/* This should not be necessary. */
if (stop_registers)
stop_registers = regcache_dup (get_current_regcache ());
}
- if (stop_stack_dummy)
+ if (stop_stack_dummy == STOP_STACK_DUMMY)
{
/* Pop the empty frame that contains the stack dummy.
This also restores inferior state prior to the call
- (struct inferior_thread_state). */
+ (struct infcall_suspend_state). */
struct frame_info *frame = get_current_frame ();
+
gdb_assert (get_frame_type (frame) == DUMMY_FRAME);
frame_pop (frame);
- /* frame_pop() calls reinit_frame_cache as the last thing it does
- which means there's currently no selected frame. We don't need
- to re-establish a selected frame if the dummy call returns normally,
- that will be done by restore_inferior_status. However, we do have
- to handle the case where the dummy call is returning after being
- stopped (e.g. the dummy call previously hit a breakpoint). We
- can't know which case we have so just always re-establish a
- selected frame here. */
+ /* frame_pop() calls reinit_frame_cache as the last thing it
+ does which means there's currently no selected frame. We
+ don't need to re-establish a selected frame if the dummy call
+ returns normally, that will be done by
+ restore_infcall_control_state. However, we do have to handle
+ the case where the dummy call is returning after being
+ stopped (e.g. the dummy call previously hit a breakpoint).
+ We can't know which case we have so just always re-establish
+ a selected frame here. */
select_frame (get_current_frame ());
}
|| last.kind == TARGET_WAITKIND_SIGNALLED
|| last.kind == TARGET_WAITKIND_EXITED
|| (!inferior_thread ()->step_multi
- && !(inferior_thread ()->stop_bpstat
- && inferior_thread ()->proceed_to_finish)
- && !inferior_thread ()->in_infcall))
+ && !(inferior_thread ()->control.stop_bpstat
+ && inferior_thread ()->control.proceed_to_finish)
+ && !inferior_thread ()->control.in_infcall))
{
if (!ptid_equal (inferior_ptid, null_ptid))
- observer_notify_normal_stop (inferior_thread ()->stop_bpstat,
+ observer_notify_normal_stop (inferior_thread ()->control.stop_bpstat,
stop_print_frame);
else
observer_notify_normal_stop (NULL, stop_print_frame);
&& last.kind != TARGET_WAITKIND_EXITED)
/* Delete the breakpoint we stopped at, if it wants to be deleted.
Delete any breakpoint that is to be deleted at the next stop. */
- breakpoint_auto_delete (inferior_thread ()->stop_bpstat);
+ breakpoint_auto_delete (inferior_thread ()->control.stop_bpstat);
}
/* Try to get rid of automatically added inferiors that are no
return signal_program[signo];
}
+static void
+signal_cache_update (int signo)
+{
+ if (signo == -1)
+ {
+ for (signo = 0; signo < (int) TARGET_SIGNAL_LAST; signo++)
+ signal_cache_update (signo);
+
+ return;
+ }
+
+ signal_pass[signo] = (signal_stop[signo] == 0
+ && signal_print[signo] == 0
+ && signal_program[signo] == 1);
+}
+
int
signal_stop_update (int signo, int state)
{
int ret = signal_stop[signo];
+
signal_stop[signo] = state;
+ signal_cache_update (signo);
return ret;
}
signal_print_update (int signo, int state)
{
int ret = signal_print[signo];
+
signal_print[signo] = state;
+ signal_cache_update (signo);
return ret;
}
signal_pass_update (int signo, int state)
{
int ret = signal_program[signo];
+
signal_program[signo] = state;
+ signal_cache_update (signo);
return ret;
}
static void
sig_print_header (void)
{
- printf_filtered (_("\
-Signal Stop\tPrint\tPass to program\tDescription\n"));
+ printf_filtered (_("Signal Stop\tPrint\tPass "
+ "to program\tDescription\n"));
}
static void
error_no_arg (_("signal to handle"));
}
- /* Allocate and zero an array of flags for which signals to handle. */
+ /* Allocate and zero an array of flags for which signals to handle. */
nsigs = (int) TARGET_SIGNAL_LAST;
sigs = (unsigned char *) alloca (nsigs);
memset (sigs, 0, nsigs);
- /* Break the command line up into args. */
+ /* Break the command line up into args. */
argv = gdb_buildargv (args);
old_chain = make_cleanup_freeargv (argv);
/* Walk through the args, looking for signal oursigs, signal names, and
actions. Signal numbers and signal names may be interspersed with
actions, with the actions being performed for all signals cumulatively
- specified. Signal ranges can be specified as <LOW>-<HIGH>. */
+ specified. Signal ranges can be specified as <LOW>-<HIGH>. */
while (*argv != NULL)
{
if (wordlen >= 1 && !strncmp (*argv, "all", wordlen))
{
/* Apply action to all signals except those used by the
- debugger. Silently skip those. */
+ debugger. Silently skip those. */
allsigs = 1;
sigfirst = 0;
siglast = nsigs - 1;
}
if (sigfirst > siglast)
{
- /* Bet he didn't figure we'd think of this case... */
+ /* Bet he didn't figure we'd think of this case... */
signum = sigfirst;
sigfirst = siglast;
siglast = signum;
}
/* If any signal numbers or symbol names were found, set flags for
- which signals to apply actions to. */
+ which signals to apply actions to. */
for (signum = sigfirst; signum >= 0 && signum <= siglast; signum++)
{
if (!allsigs && !sigs[signum])
{
if (query (_("%s is used by the debugger.\n\
-Are you sure you want to change it? "), target_signal_to_name ((enum target_signal) signum)))
+Are you sure you want to change it? "),
+ target_signal_to_name ((enum target_signal) signum)))
{
sigs[signum] = 1;
}
for (signum = 0; signum < nsigs; signum++)
if (sigs[signum])
{
- target_notice_signals (inferior_ptid);
+ signal_cache_update (-1);
+ target_pass_signals ((int) TARGET_SIGNAL_LAST, signal_pass);
if (from_tty)
{
if (args == NULL)
error_no_arg (_("xdb command"));
- /* Break the command line up into args. */
+ /* Break the command line up into args. */
argv = gdb_buildargv (args);
old_chain = make_cleanup_freeargv (argv);
signals_info (char *signum_exp, int from_tty)
{
enum target_signal oursig;
+
sig_print_header ();
if (signum_exp)
sig_print_info (oursig);
}
- printf_filtered (_("\nUse the \"handle\" command to change these tables.\n"));
+ printf_filtered (_("\nUse the \"handle\" command "
+ "to change these tables.\n"));
}
/* The $_siginfo convenience variable is a bit special. We don't know
for sure the type of the value until we actually have a chance to
- fetch the data. The type can change depending on gdbarch, so it it
+ fetch the data. The type can change depending on gdbarch, so it is
also dependent on which thread you have selected.
1. making $_siginfo be an internalvar that creates a new value on
&& gdbarch_get_siginfo_type_p (gdbarch))
{
struct type *type = gdbarch_get_siginfo_type (gdbarch);
+
return allocate_computed_value (type, &siginfo_value_funcs, NULL);
}
}
\f
-/* Inferior thread state.
- These are details related to the inferior itself, and don't include
- things like what frame the user had selected or what gdb was doing
- with the target at the time.
- For inferior function calls these are things we want to restore
- regardless of whether the function call successfully completes
- or the dummy frame has to be manually popped. */
+/* infcall_suspend_state contains state about the program itself like its
+ registers and any signal it received when it last stopped.
+ This state must be restored regardless of how the inferior function call
+ ends (either successfully, or after it hits a breakpoint or signal)
+ if the program is to properly continue where it left off. */
-struct inferior_thread_state
+struct infcall_suspend_state
{
- enum target_signal stop_signal;
+ struct thread_suspend_state thread_suspend;
+ struct inferior_suspend_state inferior_suspend;
+
+ /* Other fields: */
CORE_ADDR stop_pc;
struct regcache *registers;
+
+ /* Format of SIGINFO_DATA or NULL if it is not present. */
+ struct gdbarch *siginfo_gdbarch;
+
+ /* The inferior format depends on SIGINFO_GDBARCH and it has a length of
+ TYPE_LENGTH (gdbarch_get_siginfo_type ()). For different gdbarch the
+ content would be invalid. */
+ gdb_byte *siginfo_data;
};
-struct inferior_thread_state *
-save_inferior_thread_state (void)
+struct infcall_suspend_state *
+save_infcall_suspend_state (void)
{
- struct inferior_thread_state *inf_state = XMALLOC (struct inferior_thread_state);
+ struct infcall_suspend_state *inf_state;
struct thread_info *tp = inferior_thread ();
+ struct inferior *inf = current_inferior ();
+ struct regcache *regcache = get_current_regcache ();
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ gdb_byte *siginfo_data = NULL;
+
+ if (gdbarch_get_siginfo_type_p (gdbarch))
+ {
+ struct type *type = gdbarch_get_siginfo_type (gdbarch);
+ size_t len = TYPE_LENGTH (type);
+ struct cleanup *back_to;
+
+ siginfo_data = xmalloc (len);
+ back_to = make_cleanup (xfree, siginfo_data);
+
+ if (target_read (¤t_target, TARGET_OBJECT_SIGNAL_INFO, NULL,
+ siginfo_data, 0, len) == len)
+ discard_cleanups (back_to);
+ else
+ {
+ /* Errors ignored. */
+ do_cleanups (back_to);
+ siginfo_data = NULL;
+ }
+ }
+
+ inf_state = XZALLOC (struct infcall_suspend_state);
+
+ if (siginfo_data)
+ {
+ inf_state->siginfo_gdbarch = gdbarch;
+ inf_state->siginfo_data = siginfo_data;
+ }
+
+ inf_state->thread_suspend = tp->suspend;
+ inf_state->inferior_suspend = inf->suspend;
+
+ /* run_inferior_call will not use the signal due to its `proceed' call with
+ TARGET_SIGNAL_0 anyway. */
+ tp->suspend.stop_signal = TARGET_SIGNAL_0;
- inf_state->stop_signal = tp->stop_signal;
inf_state->stop_pc = stop_pc;
- inf_state->registers = regcache_dup (get_current_regcache ());
+ inf_state->registers = regcache_dup (regcache);
return inf_state;
}
/* Restore inferior session state to INF_STATE. */
void
-restore_inferior_thread_state (struct inferior_thread_state *inf_state)
+restore_infcall_suspend_state (struct infcall_suspend_state *inf_state)
{
struct thread_info *tp = inferior_thread ();
+ struct inferior *inf = current_inferior ();
+ struct regcache *regcache = get_current_regcache ();
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+
+ tp->suspend = inf_state->thread_suspend;
+ inf->suspend = inf_state->inferior_suspend;
- tp->stop_signal = inf_state->stop_signal;
stop_pc = inf_state->stop_pc;
+ if (inf_state->siginfo_gdbarch == gdbarch)
+ {
+ struct type *type = gdbarch_get_siginfo_type (gdbarch);
+ size_t len = TYPE_LENGTH (type);
+
+ /* Errors ignored. */
+ target_write (¤t_target, TARGET_OBJECT_SIGNAL_INFO, NULL,
+ inf_state->siginfo_data, 0, len);
+ }
+
/* The inferior can be gone if the user types "print exit(0)"
(and perhaps other times). */
if (target_has_execution)
/* NB: The register write goes through to the target. */
- regcache_cpy (get_current_regcache (), inf_state->registers);
- regcache_xfree (inf_state->registers);
- xfree (inf_state);
+ regcache_cpy (regcache, inf_state->registers);
+
+ discard_infcall_suspend_state (inf_state);
}
static void
-do_restore_inferior_thread_state_cleanup (void *state)
+do_restore_infcall_suspend_state_cleanup (void *state)
{
- restore_inferior_thread_state (state);
+ restore_infcall_suspend_state (state);
}
struct cleanup *
-make_cleanup_restore_inferior_thread_state (struct inferior_thread_state *inf_state)
+make_cleanup_restore_infcall_suspend_state
+ (struct infcall_suspend_state *inf_state)
{
- return make_cleanup (do_restore_inferior_thread_state_cleanup, inf_state);
+ return make_cleanup (do_restore_infcall_suspend_state_cleanup, inf_state);
}
void
-discard_inferior_thread_state (struct inferior_thread_state *inf_state)
+discard_infcall_suspend_state (struct infcall_suspend_state *inf_state)
{
regcache_xfree (inf_state->registers);
+ xfree (inf_state->siginfo_data);
xfree (inf_state);
}
struct regcache *
-get_inferior_thread_state_regcache (struct inferior_thread_state *inf_state)
+get_infcall_suspend_state_regcache (struct infcall_suspend_state *inf_state)
{
return inf_state->registers;
}
-/* Session related state for inferior function calls.
- These are the additional bits of state that need to be restored
- when an inferior function call successfully completes. */
+/* infcall_control_state contains state regarding gdb's control of the
+ inferior itself like stepping control. It also contains session state like
+ the user's currently selected frame. */
-struct inferior_status
+struct infcall_control_state
{
- bpstat stop_bpstat;
- int stop_step;
- int stop_stack_dummy;
+ struct thread_control_state thread_control;
+ struct inferior_control_state inferior_control;
+
+ /* Other fields: */
+ enum stop_stack_kind stop_stack_dummy;
int stopped_by_random_signal;
- int stepping_over_breakpoint;
- CORE_ADDR step_range_start;
- CORE_ADDR step_range_end;
- struct frame_id step_frame_id;
- struct frame_id step_stack_frame_id;
- enum step_over_calls_kind step_over_calls;
- CORE_ADDR step_resume_break_address;
int stop_after_trap;
- int stop_soon;
/* ID if the selected frame when the inferior function call was made. */
struct frame_id selected_frame_id;
-
- int proceed_to_finish;
- int in_infcall;
};
/* Save all of the information associated with the inferior<==>gdb
connection. */
-struct inferior_status *
-save_inferior_status (void)
+struct infcall_control_state *
+save_infcall_control_state (void)
{
- struct inferior_status *inf_status = XMALLOC (struct inferior_status);
+ struct infcall_control_state *inf_status = xmalloc (sizeof (*inf_status));
struct thread_info *tp = inferior_thread ();
struct inferior *inf = current_inferior ();
- inf_status->stop_step = tp->stop_step;
+ inf_status->thread_control = tp->control;
+ inf_status->inferior_control = inf->control;
+
+ tp->control.step_resume_breakpoint = NULL;
+ tp->control.exception_resume_breakpoint = NULL;
+
+ /* Save original bpstat chain to INF_STATUS; replace it in TP with copy of
+ chain. If caller's caller is walking the chain, they'll be happier if we
+ hand them back the original chain when restore_infcall_control_state is
+ called. */
+ tp->control.stop_bpstat = bpstat_copy (tp->control.stop_bpstat);
+
+ /* Other fields: */
inf_status->stop_stack_dummy = stop_stack_dummy;
inf_status->stopped_by_random_signal = stopped_by_random_signal;
- inf_status->stepping_over_breakpoint = tp->trap_expected;
- inf_status->step_range_start = tp->step_range_start;
- inf_status->step_range_end = tp->step_range_end;
- inf_status->step_frame_id = tp->step_frame_id;
- inf_status->step_stack_frame_id = tp->step_stack_frame_id;
- inf_status->step_over_calls = tp->step_over_calls;
inf_status->stop_after_trap = stop_after_trap;
- inf_status->stop_soon = inf->stop_soon;
- /* Save original bpstat chain here; replace it with copy of chain.
- If caller's caller is walking the chain, they'll be happier if we
- hand them back the original chain when restore_inferior_status is
- called. */
- inf_status->stop_bpstat = tp->stop_bpstat;
- tp->stop_bpstat = bpstat_copy (tp->stop_bpstat);
- inf_status->proceed_to_finish = tp->proceed_to_finish;
- inf_status->in_infcall = tp->in_infcall;
inf_status->selected_frame_id = get_frame_id (get_selected_frame (NULL));
/* Restore inferior session state to INF_STATUS. */
void
-restore_inferior_status (struct inferior_status *inf_status)
+restore_infcall_control_state (struct infcall_control_state *inf_status)
{
struct thread_info *tp = inferior_thread ();
struct inferior *inf = current_inferior ();
- tp->stop_step = inf_status->stop_step;
+ if (tp->control.step_resume_breakpoint)
+ tp->control.step_resume_breakpoint->disposition = disp_del_at_next_stop;
+
+ if (tp->control.exception_resume_breakpoint)
+ tp->control.exception_resume_breakpoint->disposition
+ = disp_del_at_next_stop;
+
+ /* Handle the bpstat_copy of the chain. */
+ bpstat_clear (&tp->control.stop_bpstat);
+
+ tp->control = inf_status->thread_control;
+ inf->control = inf_status->inferior_control;
+
+ /* Other fields: */
stop_stack_dummy = inf_status->stop_stack_dummy;
stopped_by_random_signal = inf_status->stopped_by_random_signal;
- tp->trap_expected = inf_status->stepping_over_breakpoint;
- tp->step_range_start = inf_status->step_range_start;
- tp->step_range_end = inf_status->step_range_end;
- tp->step_frame_id = inf_status->step_frame_id;
- tp->step_stack_frame_id = inf_status->step_stack_frame_id;
- tp->step_over_calls = inf_status->step_over_calls;
stop_after_trap = inf_status->stop_after_trap;
- inf->stop_soon = inf_status->stop_soon;
- bpstat_clear (&tp->stop_bpstat);
- tp->stop_bpstat = inf_status->stop_bpstat;
- inf_status->stop_bpstat = NULL;
- tp->proceed_to_finish = inf_status->proceed_to_finish;
- tp->in_infcall = inf_status->in_infcall;
if (target_has_stack)
{
}
static void
-do_restore_inferior_status_cleanup (void *sts)
+do_restore_infcall_control_state_cleanup (void *sts)
{
- restore_inferior_status (sts);
+ restore_infcall_control_state (sts);
}
struct cleanup *
-make_cleanup_restore_inferior_status (struct inferior_status *inf_status)
+make_cleanup_restore_infcall_control_state
+ (struct infcall_control_state *inf_status)
{
- return make_cleanup (do_restore_inferior_status_cleanup, inf_status);
+ return make_cleanup (do_restore_infcall_control_state_cleanup, inf_status);
}
void
-discard_inferior_status (struct inferior_status *inf_status)
+discard_infcall_control_state (struct infcall_control_state *inf_status)
{
- /* See save_inferior_status for info on stop_bpstat. */
- bpstat_clear (&inf_status->stop_bpstat);
+ if (inf_status->thread_control.step_resume_breakpoint)
+ inf_status->thread_control.step_resume_breakpoint->disposition
+ = disp_del_at_next_stop;
+
+ if (inf_status->thread_control.exception_resume_breakpoint)
+ inf_status->thread_control.exception_resume_breakpoint->disposition
+ = disp_del_at_next_stop;
+
+ /* See save_infcall_control_state for info on stop_bpstat. */
+ bpstat_clear (&inf_status->thread_control.stop_bpstat);
+
xfree (inf_status);
}
\f
return (ptid_get_lwp (ptid) == 0 && ptid_get_tid (ptid) == 0);
}
+int
+ptid_match (ptid_t ptid, ptid_t filter)
+{
+ if (ptid_equal (filter, minus_one_ptid))
+ return 1;
+ if (ptid_is_pid (filter)
+ && ptid_get_pid (ptid) == ptid_get_pid (filter))
+ return 1;
+ else if (ptid_equal (ptid, filter))
+ return 1;
+
+ return 0;
+}
+
/* restore_inferior_ptid() will be used by the cleanup machinery
to restore the inferior_ptid value saved in a call to
save_inferior_ptid(). */
restore_inferior_ptid (void *arg)
{
ptid_t *saved_ptid_ptr = arg;
+
inferior_ptid = *saved_ptid_ptr;
xfree (arg);
}
else if (!strcmp (exec_direction, exec_reverse))
execution_direction = EXEC_REVERSE;
}
+ else
+ {
+ exec_direction = exec_forward;
+ error (_("Target does not support this operation."));
+ }
}
static void
break;
case EXEC_ERROR:
default:
- fprintf_filtered (out,
- _("Forward (target `%s' does not support exec-direction).\n"),
+ fprintf_filtered (out, _("Forward (target `%s' does not "
+ "support exec-direction).\n"),
target_shortname);
break;
}
/* User interface for non-stop mode. */
int non_stop = 0;
-static int non_stop_1 = 0;
static void
set_non_stop (char *args, int from_tty,
show_schedule_multiple (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
- fprintf_filtered (file, _("\
-Resuming the execution of threads of all processes is %s.\n"), value);
+ fprintf_filtered (file, _("Resuming the execution of threads "
+ "of all processes is %s.\n"), value);
}
void
{
int i;
int numsigs;
- struct cmd_list_element *c;
add_info ("signals", signals_info, _("\
What debugger does when program gets various signals.\n\
Numeric ranges may be specified with the form LOW-HIGH (e.g. 1-5).\n\
The special arg \"all\" is recognized to mean all signals except those\n\
used by the debugger, typically SIGTRAP and SIGINT.\n\
-Recognized actions include \"s\" (toggles between stop and nostop), \n\
+Recognized actions include \"s\" (toggles between stop and nostop),\n\
\"r\" (toggles between print and noprint), \"i\" (toggles between pass and \
nopass), \"Q\" (noprint)\n\
Stop means reenter debugger if this signal happens (implies print).\n\
show_debug_infrun,
&setdebuglist, &showdebuglist);
- add_setshow_boolean_cmd ("displaced", class_maintenance, &debug_displaced, _("\
+ add_setshow_boolean_cmd ("displaced", class_maintenance,
+ &debug_displaced, _("\
Set displaced stepping debugging."), _("\
Show displaced stepping debugging."), _("\
When non-zero, displaced stepping specific debugging is enabled."),
xmalloc (sizeof (signal_print[0]) * numsigs);
signal_program = (unsigned char *)
xmalloc (sizeof (signal_program[0]) * numsigs);
+ signal_pass = (unsigned char *)
+ xmalloc (sizeof (signal_program[0]) * numsigs);
for (i = 0; i < numsigs; i++)
{
signal_stop[i] = 1;
signal_print[TARGET_SIGNAL_URG] = 0;
signal_stop[TARGET_SIGNAL_WINCH] = 0;
signal_print[TARGET_SIGNAL_WINCH] = 0;
+ signal_stop[TARGET_SIGNAL_PRIO] = 0;
+ signal_print[TARGET_SIGNAL_PRIO] = 0;
/* These signals are used internally by user-level thread
implementations. (See signal(5) on Solaris.) Like the above
signal_stop[TARGET_SIGNAL_CANCEL] = 0;
signal_print[TARGET_SIGNAL_CANCEL] = 0;
+ /* Update cached state. */
+ signal_cache_update (-1);
+
add_setshow_zinteger_cmd ("stop-on-solib-events", class_support,
&stop_on_solib_events, _("\
Set stopping for shared library events."), _("\
\n\
follow-exec-mode can be:\n\
\n\
- new - the debugger creates a new inferior and rebinds the process \n\
+ new - the debugger creates a new inferior and rebinds the process\n\
to this new inferior. The program the process was running before\n\
the exec call can be restarted afterwards by restarting the original\n\
inferior.\n\
minus_one_ptid = ptid_build (-1, 0, 0);
inferior_ptid = null_ptid;
target_last_wait_ptid = minus_one_ptid;
- displaced_step_ptid = null_ptid;
observer_attach_thread_ptid_changed (infrun_thread_ptid_changed);
observer_attach_thread_stop_requested (infrun_thread_stop_requested);
observer_attach_thread_exit (infrun_thread_thread_exit);
+ observer_attach_inferior_exit (infrun_inferior_exit);
/* Explicitly create without lookup, since that tries to create a
value with a void typed value, and when we get here, gdbarch
isn't initialized yet. At this point, we're quite sure there
isn't another convenience variable of the same name. */
create_internalvar_type_lazy ("_siginfo", siginfo_make_value);
+
+ add_setshow_boolean_cmd ("observer", no_class,
+ &observer_mode_1, _("\
+Set whether gdb controls the inferior in observer mode."), _("\
+Show whether gdb controls the inferior in observer mode."), _("\
+In observer mode, GDB can get data from the inferior, but not\n\
+affect its execution. Registers and memory may not be changed,\n\
+breakpoints may not be set, and the program cannot be interrupted\n\
+or signalled."),
+ set_observer_mode,
+ show_observer_mode,
+ &setlist,
+ &showlist);
}
projects / deliverable / binutils-gdb.git / blobdiff