static int stabilizing_threads;
static void unsuspend_all_lwps (struct lwp_info *except);
-static struct lwp_info *add_lwp (ptid_t ptid);
static void mark_lwp_dead (struct lwp_info *lwp, int wstat);
static int lwp_is_marked_dead (struct lwp_info *lwp);
static int finish_step_over (struct lwp_info *lwp);
return 0;
}
-/* True if the low target can software single-step. Such targets
- implement the GET_NEXT_PCS callback. */
-
-static int
-can_software_single_step (void)
-{
- return (the_low_target.get_next_pcs != NULL);
-}
-
bool
linux_process_target::low_supports_breakpoints ()
{
gdb_assert_not_reached ("linux target op low_set_pc is not implemented");
}
+std::vector<CORE_ADDR>
+linux_process_target::low_get_next_pcs (regcache *regcache)
+{
+ gdb_assert_not_reached ("linux target op low_get_next_pcs is not "
+ "implemented");
+}
+
+int
+linux_process_target::low_decr_pc_after_break ()
+{
+ return 0;
+}
+
/* Returns true if this target can support fast tracepoints. This
does not mean that the in-process agent has been loaded in the
inferior. */
return elf_64_file_p (file, machine);
}
-static void
-delete_lwp (struct lwp_info *lwp)
+void
+linux_process_target::delete_lwp (lwp_info *lwp)
{
struct thread_info *thr = get_lwp_thread (lwp);
remove_thread (thr);
- if (the_low_target.delete_thread != NULL)
- the_low_target.delete_thread (lwp->arch_private);
- else
- gdb_assert (lwp->arch_private == NULL);
+ low_delete_thread (lwp->arch_private);
free (lwp);
}
-/* Add a process to the common process list, and set its private
- data. */
+void
+linux_process_target::low_delete_thread (arch_lwp_info *info)
+{
+ /* Default implementation should be overridden if architecture-specific
+ info is being used. */
+ gdb_assert (info == nullptr);
+}
-static struct process_info *
-linux_add_process (int pid, int attached)
+process_info *
+linux_process_target::add_linux_process (int pid, int attached)
{
struct process_info *proc;
proc = add_process (pid, attached);
proc->priv = XCNEW (struct process_info_private);
- if (the_low_target.new_process != NULL)
- proc->priv->arch_private = the_low_target.new_process ();
+ proc->priv->arch_private = low_new_process ();
return proc;
}
+arch_process_info *
+linux_process_target::low_new_process ()
+{
+ return nullptr;
+}
+
+void
+linux_process_target::low_delete_process (arch_process_info *info)
+{
+ /* Default implementation must be overridden if architecture-specific
+ info exists. */
+ gdb_assert (info == nullptr);
+}
+
+void
+linux_process_target::low_new_fork (process_info *parent, process_info *child)
+{
+ /* Nop. */
+}
+
void
linux_process_target::arch_setup_thread (thread_info *thread)
{
will be detached, since we will need the process object and the
breakpoints to remove any breakpoints from memory when we
detach, and the client side will access registers. */
- child_proc = linux_add_process (new_pid, 0);
+ child_proc = add_linux_process (new_pid, 0);
gdb_assert (child_proc != NULL);
child_lwp = add_lwp (ptid);
gdb_assert (child_lwp != NULL);
child_proc->attached = parent_proc->attached;
if (event_lwp->bp_reinsert != 0
- && can_software_single_step ()
+ && supports_software_single_step ()
&& event == PTRACE_EVENT_VFORK)
{
/* If we leave single-step breakpoints there, child will
child_proc->tdesc = tdesc;
/* Clone arch-specific process data. */
- if (the_low_target.new_fork != NULL)
- the_low_target.new_fork (parent_proc, child_proc);
+ low_new_fork (parent_proc, child_proc);
/* Save fork info in the parent thread. */
if (event == PTRACE_EVENT_FORK)
In case of vfork, we'll reinsert them back once vforked
child is done. */
if (event_lwp->bp_reinsert != 0
- && can_software_single_step ())
+ && supports_software_single_step ())
{
/* The child process is forked and stopped, so it is safe
to access its memory without stopping all other threads
{
event_lwp->waitstatus.kind = TARGET_WAITKIND_VFORK_DONE;
- if (event_lwp->bp_reinsert != 0 && can_software_single_step ())
+ if (event_lwp->bp_reinsert != 0 && supports_software_single_step ())
{
reinsert_single_step_breakpoints (event_thr);
current_thread = NULL;
/* Create a new process/lwp/thread. */
- proc = linux_add_process (event_pid, 0);
+ proc = add_linux_process (event_pid, 0);
event_lwp = add_lwp (event_ptid);
event_thr = get_lwp_thread (event_lwp);
gdb_assert (current_thread == event_thr);
current_thread = saved_thread;
}
-static int check_stopped_by_watchpoint (struct lwp_info *child);
-
bool
linux_process_target::save_stop_reason (lwp_info *lwp)
{
return false;
pc = get_pc (lwp);
- sw_breakpoint_pc = pc - the_low_target.decr_pc_after_break;
+ sw_breakpoint_pc = pc - low_decr_pc_after_break ();
/* breakpoint_at reads from the current thread. */
saved_thread = current_thread;
then the user inserts a breakpoint inside the range. In that
case we need to report the breakpoint PC. */
if ((!lwp->stepping || lwp->stop_pc == sw_breakpoint_pc)
- && (*the_low_target.breakpoint_at) (sw_breakpoint_pc))
+ && low_breakpoint_at (sw_breakpoint_pc))
lwp->stop_reason = TARGET_STOPPED_BY_SW_BREAKPOINT;
if (hardware_breakpoint_inserted_here (pc))
return true;
}
-static struct lwp_info *
-add_lwp (ptid_t ptid)
+lwp_info *
+linux_process_target::add_lwp (ptid_t ptid)
{
struct lwp_info *lwp;
lwp->thread = add_thread (ptid, lwp);
- if (the_low_target.new_thread != NULL)
- the_low_target.new_thread (lwp);
+ low_new_thread (lwp);
return lwp;
}
+void
+linux_process_target::low_new_thread (lwp_info *info)
+{
+ /* Nop. */
+}
+
/* Callback to be used when calling fork_inferior, responsible for
actually initiating the tracing of the inferior. */
NULL, NULL, NULL, NULL);
}
- linux_add_process (pid, 0);
+ add_linux_process (pid, 0);
ptid = ptid_t (pid, pid, 0);
new_lwp = add_lwp (ptid);
}
}
-/* Attach to an inferior process. Returns 0 on success, ERRNO on
- error. */
-
int
-linux_attach_lwp (ptid_t ptid)
+linux_process_target::attach_lwp (ptid_t ptid)
{
struct lwp_info *new_lwp;
int lwpid = ptid.lwp ();
if (debug_threads)
debug_printf ("Found new lwp %d\n", lwpid);
- err = linux_attach_lwp (ptid);
+ err = the_linux_target->attach_lwp (ptid);
/* Be quiet if we simply raced with the thread exiting. EPERM
is returned if the thread's task still exists, and is marked
ptid_t ptid = ptid_t (pid, pid, 0);
int err;
- proc = linux_add_process (pid, 1);
+ proc = add_linux_process (pid, 1);
/* Attach to PID. We will check for other threads
soon. */
- err = linux_attach_lwp (ptid);
+ err = attach_lwp (ptid);
if (err != 0)
{
remove_process (proc);
}
}
-/* Detach from LWP. */
-
-static void
-linux_detach_one_lwp (struct lwp_info *lwp)
+void
+linux_process_target::detach_one_lwp (lwp_info *lwp)
{
struct thread_info *thread = get_lwp_thread (lwp);
int sig;
regcache_invalidate_thread (thread);
/* Finally, let it resume. */
- if (the_low_target.prepare_to_resume != NULL)
- the_low_target.prepare_to_resume (lwp);
+ low_prepare_to_resume (lwp);
}
catch (const gdb_exception_error &ex)
{
delete_lwp (lwp);
}
-/* Callback for for_each_thread. Detaches from non-leader threads of a
- given process. */
-
-static void
-linux_detach_lwp_callback (thread_info *thread)
-{
- /* We don't actually detach from the thread group leader just yet.
- If the thread group exits, we must reap the zombie clone lwps
- before we're able to reap the leader. */
- if (thread->id.pid () == thread->id.lwp ())
- return;
-
- lwp_info *lwp = get_thread_lwp (thread);
- linux_detach_one_lwp (lwp);
-}
-
int
linux_process_target::detach (process_info *process)
{
/* Detach from the clone lwps first. If the thread group exits just
while we're detaching, we must reap the clone lwps before we're
able to reap the leader. */
- for_each_thread (process->pid, linux_detach_lwp_callback);
+ for_each_thread (process->pid, [this] (thread_info *thread)
+ {
+ /* We don't actually detach from the thread group leader just yet.
+ If the thread group exits, we must reap the zombie clone lwps
+ before we're able to reap the leader. */
+ if (thread->id.pid () == thread->id.lwp ())
+ return;
+
+ lwp_info *lwp = get_thread_lwp (thread);
+ detach_one_lwp (lwp);
+ });
main_lwp = find_lwp_pid (ptid_t (process->pid));
- linux_detach_one_lwp (main_lwp);
+ detach_one_lwp (main_lwp);
mourn (process);
thread_db_mourn (process);
#endif
- for_each_thread (process->pid, [] (thread_info *thread)
+ for_each_thread (process->pid, [this] (thread_info *thread)
{
delete_lwp (get_thread_lwp (thread));
});
/* Freeing all private data. */
priv = process->priv;
- if (the_low_target.delete_process != NULL)
- the_low_target.delete_process (priv->arch_private);
- else
- gdb_assert (priv->arch_private == NULL);
+ low_delete_process (priv->arch_private);
free (priv);
process->priv = NULL;
#if !USE_SIGTRAP_SIGINFO
else if (lp->stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT
- && !(*the_low_target.breakpoint_at) (pc))
+ && !low_breakpoint_at (pc))
{
if (debug_threads)
debug_printf ("previous SW breakpoint of %ld gone\n",
return get_thread_lwp (thread);
}
-/* Detect zombie thread group leaders, and "exit" them. We can't reap
- their exits until all other threads in the group have exited. */
-
-static void
-check_zombie_leaders (void)
+void
+linux_process_target::check_zombie_leaders ()
{
- for_each_process ([] (process_info *proc) {
+ for_each_process ([this] (process_info *proc) {
pid_t leader_pid = pid_of (proc);
struct lwp_info *leader_lp;
return 0;
}
-/* Fetch the possibly triggered data watchpoint info and store it in
- CHILD.
-
- On some archs, like x86, that use debug registers to set
- watchpoints, it's possible that the way to know which watched
- address trapped, is to check the register that is used to select
- which address to watch. Problem is, between setting the watchpoint
- and reading back which data address trapped, the user may change
- the set of watchpoints, and, as a consequence, GDB changes the
- debug registers in the inferior. To avoid reading back a stale
- stopped-data-address when that happens, we cache in LP the fact
- that a watchpoint trapped, and the corresponding data address, as
- soon as we see CHILD stop with a SIGTRAP. If GDB changes the debug
- registers meanwhile, we have the cached data we can rely on. */
-
-static int
-check_stopped_by_watchpoint (struct lwp_info *child)
+bool
+linux_process_target::check_stopped_by_watchpoint (lwp_info *child)
{
- if (the_low_target.stopped_by_watchpoint != NULL)
- {
- struct thread_info *saved_thread;
+ struct thread_info *saved_thread = current_thread;
+ current_thread = get_lwp_thread (child);
- saved_thread = current_thread;
- current_thread = get_lwp_thread (child);
+ if (low_stopped_by_watchpoint ())
+ {
+ child->stop_reason = TARGET_STOPPED_BY_WATCHPOINT;
+ child->stopped_data_address = low_stopped_data_address ();
+ }
- if (the_low_target.stopped_by_watchpoint ())
- {
- child->stop_reason = TARGET_STOPPED_BY_WATCHPOINT;
+ current_thread = saved_thread;
- if (the_low_target.stopped_data_address != NULL)
- child->stopped_data_address
- = the_low_target.stopped_data_address ();
- else
- child->stopped_data_address = 0;
- }
+ return child->stop_reason == TARGET_STOPPED_BY_WATCHPOINT;
+}
- current_thread = saved_thread;
- }
+bool
+linux_process_target::low_stopped_by_watchpoint ()
+{
+ return false;
+}
- return child->stop_reason == TARGET_STOPPED_BY_WATCHPOINT;
+CORE_ADDR
+linux_process_target::low_stopped_data_address ()
+{
+ return 0;
}
/* Return the ptrace options that we want to try to enable. */
return null_ptid;
}
-/* Convenience function that is called when the kernel reports an exit
- event. This decides whether to report the event to GDB as a
- process exit event, a thread exit event, or to suppress the
- event. */
-
-static ptid_t
-filter_exit_event (struct lwp_info *event_child,
- struct target_waitstatus *ourstatus)
+ptid_t
+linux_process_target::filter_exit_event (lwp_info *event_child,
+ target_waitstatus *ourstatus)
{
client_state &cs = get_client_state ();
struct thread_info *thread = get_lwp_thread (event_child);
event_child->stop_pc += increment_pc;
low_set_pc (regcache, event_child->stop_pc);
- if (!(*the_low_target.breakpoint_at) (event_child->stop_pc))
+ if (!low_breakpoint_at (event_child->stop_pc))
event_child->stop_reason = TARGET_STOPPED_BY_NO_REASON;
}
}
&& (WSTOPSIG (w) == SIGTRAP
|| ((WSTOPSIG (w) == SIGILL
|| WSTOPSIG (w) == SIGSEGV)
- && (*the_low_target.breakpoint_at) (event_child->stop_pc))));
+ && low_breakpoint_at (event_child->stop_pc))));
if (maybe_internal_trap)
{
/* Remove the single-step breakpoints if any. Note that
there isn't single-step breakpoint if we finished stepping
over. */
- if (can_software_single_step ()
+ if (supports_software_single_step ()
&& has_single_step_breakpoints (current_thread))
{
stop_all_lwps (0, event_child);
/* Alright, we're going to report a stop. */
/* Remove single-step breakpoints. */
- if (can_software_single_step ())
+ if (supports_software_single_step ())
{
/* Remove single-step breakpoints or not. It it is true, stop all
lwps, so that other threads won't hit the breakpoint in the
if (event_child->stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT
&& !cs.swbreak_feature)
{
- int decr_pc = the_low_target.decr_pc_after_break;
+ int decr_pc = low_decr_pc_after_break ();
if (decr_pc != 0)
{
scoped_restore save_current_thread = make_scoped_restore (¤t_thread);
current_thread = thread;
- std::vector<CORE_ADDR> next_pcs = the_low_target.get_next_pcs (regcache);
+ std::vector<CORE_ADDR> next_pcs = low_get_next_pcs (regcache);
for (CORE_ADDR pc : next_pcs)
set_single_step_breakpoint (pc, current_ptid);
{
step = 1;
}
- else if (can_software_single_step ())
+ else if (supports_software_single_step ())
{
install_software_single_step_breakpoints (lwp);
step = 0;
lwpid_of (thread), step ? "step" : "continue", signal,
lwp->stop_expected ? "expected" : "not expected");
- if (the_low_target.prepare_to_resume != NULL)
- the_low_target.prepare_to_resume (lwp);
+ low_prepare_to_resume (lwp);
regcache_invalidate_thread (thread);
errno = 0;
lwp->stop_reason = TARGET_STOPPED_BY_NO_REASON;
}
+void
+linux_process_target::low_prepare_to_resume (lwp_info *lwp)
+{
+ /* Nop. */
+}
+
/* Called when we try to resume a stopped LWP and that errors out. If
the LWP is no longer in ptrace-stopped state (meaning it's zombie,
or about to become), discard the error, clear any pending status
/* On software single step target, resume the inferior with signal
rather than stepping over. */
- if (can_software_single_step ()
+ if (supports_software_single_step ()
&& lwp->pending_signals != NULL
&& lwp_signal_can_be_delivered (lwp))
{
/* If resume_step is requested by GDB, install single-step
breakpoints when the thread is about to be actually resumed if
the single-step breakpoints weren't removed. */
- if (can_software_single_step ()
+ if (supports_software_single_step ()
&& !has_single_step_breakpoints (thread))
install_software_single_step_breakpoints (lwp);
}
}
- if (the_low_target.supply_ptrace_register)
- the_low_target.supply_ptrace_register (regcache, regno, buf);
- else
- supply_register (regcache, regno, buf);
+ low_supply_ptrace_register (regcache, regno, buf);
}
void
buf = (char *) alloca (size);
memset (buf, 0, size);
- if (the_low_target.collect_ptrace_register)
- the_low_target.collect_ptrace_register (regcache, regno, buf);
- else
- collect_register (regcache, regno, buf);
+ low_collect_ptrace_register (regcache, regno, buf);
pid = lwpid_of (current_thread);
for (i = 0; i < size; i += sizeof (PTRACE_XFER_TYPE))
}
#endif /* HAVE_LINUX_USRREGS */
+void
+linux_process_target::low_collect_ptrace_register (regcache *regcache,
+ int regno, char *buf)
+{
+ collect_register (regcache, regno, buf);
+}
+
+void
+linux_process_target::low_supply_ptrace_register (regcache *regcache,
+ int regno, const char *buf)
+{
+ supply_register (regcache, regno, buf);
+}
+
void
linux_process_target::usr_fetch_inferior_registers (const regs_info *regs_info,
regcache *regcache,
return n;
}
-/* These breakpoint and watchpoint related wrapper functions simply
- pass on the function call if the target has registered a
- corresponding function. */
-
-bool
-linux_process_target::supports_z_point_type (char z_type)
-{
- return (the_low_target.supports_z_point_type != NULL
- && the_low_target.supports_z_point_type (z_type));
-}
-
int
linux_process_target::insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
int size, raw_breakpoint *bp)
{
if (type == raw_bkpt_type_sw)
return insert_memory_breakpoint (bp);
- else if (the_low_target.insert_point != NULL)
- return the_low_target.insert_point (type, addr, size, bp);
else
- /* Unsupported (see target.h). */
- return 1;
+ return low_insert_point (type, addr, size, bp);
+}
+
+int
+linux_process_target::low_insert_point (raw_bkpt_type type, CORE_ADDR addr,
+ int size, raw_breakpoint *bp)
+{
+ /* Unsupported (see target.h). */
+ return 1;
}
int
{
if (type == raw_bkpt_type_sw)
return remove_memory_breakpoint (bp);
- else if (the_low_target.remove_point != NULL)
- return the_low_target.remove_point (type, addr, size, bp);
else
- /* Unsupported (see target.h). */
- return 1;
+ return low_remove_point (type, addr, size, bp);
+}
+
+int
+linux_process_target::low_remove_point (raw_bkpt_type type, CORE_ADDR addr,
+ int size, raw_breakpoint *bp)
+{
+ /* Unsupported (see target.h). */
+ return 1;
}
/* Implement the stopped_by_sw_breakpoint target_ops
return can_hardware_single_step ();
}
-bool
-linux_process_target::supports_software_single_step ()
-{
- return can_software_single_step ();
-}
-
bool
linux_process_target::stopped_by_watchpoint ()
{
return linux_common_xfer_osdata (annex, readbuf, offset, len);
}
-/* Convert a native/host siginfo object, into/from the siginfo in the
- layout of the inferiors' architecture. */
-
-static void
-siginfo_fixup (siginfo_t *siginfo, gdb_byte *inf_siginfo, int direction)
+void
+linux_process_target::siginfo_fixup (siginfo_t *siginfo,
+ gdb_byte *inf_siginfo, int direction)
{
- int done = 0;
-
- if (the_low_target.siginfo_fixup != NULL)
- done = the_low_target.siginfo_fixup (siginfo, inf_siginfo, direction);
+ bool done = low_siginfo_fixup (siginfo, inf_siginfo, direction);
/* If there was no callback, or the callback didn't do anything,
then just do a straight memcpy. */
}
}
+bool
+linux_process_target::low_siginfo_fixup (siginfo_t *native, gdb_byte *inf,
+ int direction)
+{
+ return false;
+}
+
bool
linux_process_target::supports_qxfer_siginfo ()
{
bool
linux_process_target::supports_range_stepping ()
{
- if (can_software_single_step ())
+ if (supports_software_single_step ())
return true;
if (*the_low_target.supports_range_stepping == NULL)
return false;
}
#endif /* defined PT_GETDSBT || defined PTRACE_GETFDPIC */
-void
-linux_process_target::process_qsupported (char **features, int count)
-{
- if (the_low_target.process_qsupported != NULL)
- the_low_target.process_qsupported (features, count);
-}
-
bool
linux_process_target::supports_catch_syscall ()
{
return (*the_low_target.get_ipa_tdesc_idx) ();
}
-bool
-linux_process_target::supports_tracepoints ()
-{
- if (*the_low_target.supports_tracepoints == NULL)
- return false;
-
- return (*the_low_target.supports_tracepoints) ();
-}
-
CORE_ADDR
linux_process_target::read_pc (regcache *regcache)
{
return ptid_of (current_thread);
}
-/* Implementation of the target_ops method "sw_breakpoint_from_kind". */
-
-const gdb_byte *
-linux_process_target::sw_breakpoint_from_kind (int kind, int *size)
-{
- gdb_assert (the_low_target.sw_breakpoint_from_kind != NULL);
-
- return (*the_low_target.sw_breakpoint_from_kind) (kind, size);
-}
-
const char *
linux_process_target::thread_name (ptid_t thread)
{
projects / deliverable / binutils-gdb.git / blobdiff